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sfurman |
/* PowerPC64-specific support for 64-bit ELF.
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Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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Written by Linus Nordberg, Swox AB <info@swox.com>,
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based on elf32-ppc.c by Ian Lance Taylor.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* This file is based on the 64-bit PowerPC ELF ABI. It is also based
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on the file elf32-ppc.c. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/ppc.h"
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#include "elf64-ppc.h"
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static void ppc_howto_init
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PARAMS ((void));
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static reloc_howto_type *ppc64_elf_reloc_type_lookup
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
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static void ppc64_elf_info_to_howto
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PARAMS ((bfd *abfd, arelent *cache_ptr, Elf64_Internal_Rela *dst));
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static bfd_reloc_status_type ppc64_elf_ha_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc64_elf_brtaken_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc64_elf_sectoff_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc64_elf_toc_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc64_elf_toc_ha_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc64_elf_toc64_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc64_elf_unhandled_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static boolean ppc64_elf_object_p
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PARAMS ((bfd *));
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static boolean ppc64_elf_merge_private_bfd_data
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PARAMS ((bfd *, bfd *));
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/* The name of the dynamic interpreter. This is put in the .interp
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section. */
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#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
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/* The size in bytes of an entry in the procedure linkage table. */
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#define PLT_ENTRY_SIZE 24
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/* The initial size of the plt reserved for the dynamic linker. */
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#define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE
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/* TOC base pointers offset from start of TOC. */
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#define TOC_BASE_OFF (0x8000)
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/* .plt call stub instructions. */
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#define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */
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#define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */
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#define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */
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#define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */
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#define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */
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/* ld %r11,xxx+16@l(%r12) */
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#define BCTR 0x4e800420 /* bctr */
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/* The normal stub is this size. */
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#define PLT_CALL_STUB_SIZE (7*4)
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/* But sometimes the .plt entry crosses a 64k boundary, and we need
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to adjust the high word with this insn. */
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#define ADDIS_R12_R12_1 0x3d8c0001 /* addis %r12,%r12,1 */
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/* The .glink fixup call stub is the same as the .plt call stub, but
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the first instruction restores r2, and the std is omitted. */
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#define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */
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/* Always allow this much space. */
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#define GLINK_CALL_STUB_SIZE (8*4)
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/* Pad with this. */
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#define NOP 0x60000000
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/* Some other nops. */
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#define CROR_151515 0x4def7b82
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#define CROR_313131 0x4ffffb82
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/* .glink entries for the first 32k functions are two instructions. */
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#define LI_R0_0 0x38000000 /* li %r0,0 */
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#define B_DOT 0x48000000 /* b . */
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/* After that, we need two instructions to load the index, followed by
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a branch. */
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#define LIS_R0_0 0x3c000000 /* lis %r0,0 */
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#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */
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/* Instructions to save and restore floating point regs. */
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#define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */
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#define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */
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#define BLR 0x4e800020 /* blr */
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/* Since .opd is an array of descriptors and each entry will end up
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with identical R_PPC64_RELATIVE relocs, there is really no need to
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propagate .opd relocs; The dynamic linker should be taught to
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relocate .opd without reloc entries. */
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#ifndef NO_OPD_RELOCS
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#define NO_OPD_RELOCS 0
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#endif
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#define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1)
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/* Relocation HOWTO's. */
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static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC_max];
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static reloc_howto_type ppc64_elf_howto_raw[] = {
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/* This reloc does nothing. */
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HOWTO (R_PPC64_NONE, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_NONE", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* A standard 32 bit relocation. */
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HOWTO (R_PPC64_ADDR32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR32", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 26 bit branch; the lower two bits must be zero.
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FIXME: we don't check that, we just clear them. */
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HOWTO (R_PPC64_ADDR24, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR24", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x03fffffc, /* dst_mask */
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false), /* pcrel_offset */
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/* A standard 16 bit relocation. */
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HOWTO (R_PPC64_ADDR16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR16", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 16 bit relocation without overflow. */
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HOWTO (R_PPC64_ADDR16_LO, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR16_LO", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Bits 16-31 of an address. */
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HOWTO (R_PPC64_ADDR16_HI, /* type */
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16, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR16_HI", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Bits 16-31 of an address, plus 1 if the contents of the low 16
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bits, treated as a signed number, is negative. */
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HOWTO (R_PPC64_ADDR16_HA, /* type */
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16, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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ppc64_elf_ha_reloc, /* special_function */
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"R_PPC64_ADDR16_HA", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 16 bit branch; the lower two bits must be zero.
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FIXME: we don't check that, we just clear them. */
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HOWTO (R_PPC64_ADDR14, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR14", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x0000fffc, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 16 bit branch, for which bit 10 should be set to
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indicate that the branch is expected to be taken. The lower two
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bits must be zero. */
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HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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ppc64_elf_brtaken_reloc, /* special_function */
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"R_PPC64_ADDR14_BRTAKEN",/* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x0000fffc, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 16 bit branch, for which bit 10 should be set to
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indicate that the branch is not expected to be taken. The lower
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two bits must be zero. */
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HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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ppc64_elf_brtaken_reloc, /* special_function */
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"R_PPC64_ADDR14_BRNTAKEN",/* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x0000fffc, /* dst_mask */
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false), /* pcrel_offset */
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/* A relative 26 bit branch; the lower two bits must be zero. */
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HOWTO (R_PPC64_REL24, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_REL24", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x03fffffc, /* dst_mask */
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true), /* pcrel_offset */
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/* A relative 16 bit branch; the lower two bits must be zero. */
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HOWTO (R_PPC64_REL14, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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313 |
|
|
"R_PPC64_REL14", /* name */
|
314 |
|
|
false, /* partial_inplace */
|
315 |
|
|
0, /* src_mask */
|
316 |
|
|
0x0000fffc, /* dst_mask */
|
317 |
|
|
true), /* pcrel_offset */
|
318 |
|
|
|
319 |
|
|
/* A relative 16 bit branch. Bit 10 should be set to indicate that
|
320 |
|
|
the branch is expected to be taken. The lower two bits must be
|
321 |
|
|
zero. */
|
322 |
|
|
HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
|
323 |
|
|
0, /* rightshift */
|
324 |
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
325 |
|
|
16, /* bitsize */
|
326 |
|
|
true, /* pc_relative */
|
327 |
|
|
0, /* bitpos */
|
328 |
|
|
complain_overflow_signed, /* complain_on_overflow */
|
329 |
|
|
ppc64_elf_brtaken_reloc, /* special_function */
|
330 |
|
|
"R_PPC64_REL14_BRTAKEN", /* name */
|
331 |
|
|
false, /* partial_inplace */
|
332 |
|
|
0, /* src_mask */
|
333 |
|
|
0x0000fffc, /* dst_mask */
|
334 |
|
|
true), /* pcrel_offset */
|
335 |
|
|
|
336 |
|
|
/* A relative 16 bit branch. Bit 10 should be set to indicate that
|
337 |
|
|
the branch is not expected to be taken. The lower two bits must
|
338 |
|
|
be zero. */
|
339 |
|
|
HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
|
340 |
|
|
0, /* rightshift */
|
341 |
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
342 |
|
|
16, /* bitsize */
|
343 |
|
|
true, /* pc_relative */
|
344 |
|
|
0, /* bitpos */
|
345 |
|
|
complain_overflow_signed, /* complain_on_overflow */
|
346 |
|
|
ppc64_elf_brtaken_reloc, /* special_function */
|
347 |
|
|
"R_PPC64_REL14_BRNTAKEN",/* name */
|
348 |
|
|
false, /* partial_inplace */
|
349 |
|
|
0, /* src_mask */
|
350 |
|
|
0x0000fffc, /* dst_mask */
|
351 |
|
|
true), /* pcrel_offset */
|
352 |
|
|
|
353 |
|
|
/* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
|
354 |
|
|
symbol. */
|
355 |
|
|
HOWTO (R_PPC64_GOT16, /* type */
|
356 |
|
|
0, /* rightshift */
|
357 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
358 |
|
|
16, /* bitsize */
|
359 |
|
|
false, /* pc_relative */
|
360 |
|
|
0, /* bitpos */
|
361 |
|
|
complain_overflow_signed, /* complain_on_overflow */
|
362 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
363 |
|
|
"R_PPC64_GOT16", /* name */
|
364 |
|
|
false, /* partial_inplace */
|
365 |
|
|
0, /* src_mask */
|
366 |
|
|
0xffff, /* dst_mask */
|
367 |
|
|
false), /* pcrel_offset */
|
368 |
|
|
|
369 |
|
|
/* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
|
370 |
|
|
the symbol. */
|
371 |
|
|
HOWTO (R_PPC64_GOT16_LO, /* type */
|
372 |
|
|
0, /* rightshift */
|
373 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
374 |
|
|
16, /* bitsize */
|
375 |
|
|
false, /* pc_relative */
|
376 |
|
|
0, /* bitpos */
|
377 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
378 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
379 |
|
|
"R_PPC64_GOT16_LO", /* name */
|
380 |
|
|
false, /* partial_inplace */
|
381 |
|
|
0, /* src_mask */
|
382 |
|
|
0xffff, /* dst_mask */
|
383 |
|
|
false), /* pcrel_offset */
|
384 |
|
|
|
385 |
|
|
/* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
|
386 |
|
|
the symbol. */
|
387 |
|
|
HOWTO (R_PPC64_GOT16_HI, /* type */
|
388 |
|
|
16, /* rightshift */
|
389 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
390 |
|
|
16, /* bitsize */
|
391 |
|
|
false, /* pc_relative */
|
392 |
|
|
0, /* bitpos */
|
393 |
|
|
complain_overflow_dont,/* complain_on_overflow */
|
394 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
395 |
|
|
"R_PPC64_GOT16_HI", /* name */
|
396 |
|
|
false, /* partial_inplace */
|
397 |
|
|
0, /* src_mask */
|
398 |
|
|
0xffff, /* dst_mask */
|
399 |
|
|
false), /* pcrel_offset */
|
400 |
|
|
|
401 |
|
|
/* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
|
402 |
|
|
the symbol. */
|
403 |
|
|
HOWTO (R_PPC64_GOT16_HA, /* type */
|
404 |
|
|
16, /* rightshift */
|
405 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
406 |
|
|
16, /* bitsize */
|
407 |
|
|
false, /* pc_relative */
|
408 |
|
|
0, /* bitpos */
|
409 |
|
|
complain_overflow_dont,/* complain_on_overflow */
|
410 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
411 |
|
|
"R_PPC64_GOT16_HA", /* name */
|
412 |
|
|
false, /* partial_inplace */
|
413 |
|
|
0, /* src_mask */
|
414 |
|
|
0xffff, /* dst_mask */
|
415 |
|
|
false), /* pcrel_offset */
|
416 |
|
|
|
417 |
|
|
/* This is used only by the dynamic linker. The symbol should exist
|
418 |
|
|
both in the object being run and in some shared library. The
|
419 |
|
|
dynamic linker copies the data addressed by the symbol from the
|
420 |
|
|
shared library into the object, because the object being
|
421 |
|
|
run has to have the data at some particular address. */
|
422 |
|
|
HOWTO (R_PPC64_COPY, /* type */
|
423 |
|
|
0, /* rightshift */
|
424 |
|
|
0, /* this one is variable size */
|
425 |
|
|
0, /* bitsize */
|
426 |
|
|
false, /* pc_relative */
|
427 |
|
|
0, /* bitpos */
|
428 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
429 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
430 |
|
|
"R_PPC64_COPY", /* name */
|
431 |
|
|
false, /* partial_inplace */
|
432 |
|
|
0, /* src_mask */
|
433 |
|
|
0, /* dst_mask */
|
434 |
|
|
false), /* pcrel_offset */
|
435 |
|
|
|
436 |
|
|
/* Like R_PPC64_ADDR64, but used when setting global offset table
|
437 |
|
|
entries. */
|
438 |
|
|
HOWTO (R_PPC64_GLOB_DAT, /* type */
|
439 |
|
|
0, /* rightshift */
|
440 |
|
|
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
441 |
|
|
64, /* bitsize */
|
442 |
|
|
false, /* pc_relative */
|
443 |
|
|
0, /* bitpos */
|
444 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
445 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
446 |
|
|
"R_PPC64_GLOB_DAT", /* name */
|
447 |
|
|
false, /* partial_inplace */
|
448 |
|
|
0, /* src_mask */
|
449 |
|
|
ONES (64), /* dst_mask */
|
450 |
|
|
false), /* pcrel_offset */
|
451 |
|
|
|
452 |
|
|
/* Created by the link editor. Marks a procedure linkage table
|
453 |
|
|
entry for a symbol. */
|
454 |
|
|
HOWTO (R_PPC64_JMP_SLOT, /* type */
|
455 |
|
|
0, /* rightshift */
|
456 |
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
457 |
|
|
0, /* bitsize */
|
458 |
|
|
false, /* pc_relative */
|
459 |
|
|
0, /* bitpos */
|
460 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
461 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
462 |
|
|
"R_PPC64_JMP_SLOT", /* name */
|
463 |
|
|
false, /* partial_inplace */
|
464 |
|
|
0, /* src_mask */
|
465 |
|
|
0, /* dst_mask */
|
466 |
|
|
false), /* pcrel_offset */
|
467 |
|
|
|
468 |
|
|
/* Used only by the dynamic linker. When the object is run, this
|
469 |
|
|
doubleword64 is set to the load address of the object, plus the
|
470 |
|
|
addend. */
|
471 |
|
|
HOWTO (R_PPC64_RELATIVE, /* type */
|
472 |
|
|
0, /* rightshift */
|
473 |
|
|
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
474 |
|
|
64, /* bitsize */
|
475 |
|
|
false, /* pc_relative */
|
476 |
|
|
0, /* bitpos */
|
477 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
478 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
479 |
|
|
"R_PPC64_RELATIVE", /* name */
|
480 |
|
|
false, /* partial_inplace */
|
481 |
|
|
0, /* src_mask */
|
482 |
|
|
ONES (64), /* dst_mask */
|
483 |
|
|
false), /* pcrel_offset */
|
484 |
|
|
|
485 |
|
|
/* Like R_PPC64_ADDR32, but may be unaligned. */
|
486 |
|
|
HOWTO (R_PPC64_UADDR32, /* type */
|
487 |
|
|
0, /* rightshift */
|
488 |
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
489 |
|
|
32, /* bitsize */
|
490 |
|
|
false, /* pc_relative */
|
491 |
|
|
0, /* bitpos */
|
492 |
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
493 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
494 |
|
|
"R_PPC64_UADDR32", /* name */
|
495 |
|
|
false, /* partial_inplace */
|
496 |
|
|
0, /* src_mask */
|
497 |
|
|
0xffffffff, /* dst_mask */
|
498 |
|
|
false), /* pcrel_offset */
|
499 |
|
|
|
500 |
|
|
/* Like R_PPC64_ADDR16, but may be unaligned. */
|
501 |
|
|
HOWTO (R_PPC64_UADDR16, /* type */
|
502 |
|
|
0, /* rightshift */
|
503 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
504 |
|
|
16, /* bitsize */
|
505 |
|
|
false, /* pc_relative */
|
506 |
|
|
0, /* bitpos */
|
507 |
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
508 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
509 |
|
|
"R_PPC64_UADDR16", /* name */
|
510 |
|
|
false, /* partial_inplace */
|
511 |
|
|
0, /* src_mask */
|
512 |
|
|
0xffff, /* dst_mask */
|
513 |
|
|
false), /* pcrel_offset */
|
514 |
|
|
|
515 |
|
|
/* 32-bit PC relative. */
|
516 |
|
|
HOWTO (R_PPC64_REL32, /* type */
|
517 |
|
|
0, /* rightshift */
|
518 |
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
519 |
|
|
32, /* bitsize */
|
520 |
|
|
true, /* pc_relative */
|
521 |
|
|
0, /* bitpos */
|
522 |
|
|
/* FIXME: Verify. Was complain_overflow_bitfield. */
|
523 |
|
|
complain_overflow_signed, /* complain_on_overflow */
|
524 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
525 |
|
|
"R_PPC64_REL32", /* name */
|
526 |
|
|
false, /* partial_inplace */
|
527 |
|
|
0, /* src_mask */
|
528 |
|
|
0xffffffff, /* dst_mask */
|
529 |
|
|
true), /* pcrel_offset */
|
530 |
|
|
|
531 |
|
|
/* 32-bit relocation to the symbol's procedure linkage table. */
|
532 |
|
|
HOWTO (R_PPC64_PLT32, /* type */
|
533 |
|
|
0, /* rightshift */
|
534 |
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
535 |
|
|
32, /* bitsize */
|
536 |
|
|
false, /* pc_relative */
|
537 |
|
|
0, /* bitpos */
|
538 |
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
539 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
540 |
|
|
"R_PPC64_PLT32", /* name */
|
541 |
|
|
false, /* partial_inplace */
|
542 |
|
|
0, /* src_mask */
|
543 |
|
|
0xffffffff, /* dst_mask */
|
544 |
|
|
false), /* pcrel_offset */
|
545 |
|
|
|
546 |
|
|
/* 32-bit PC relative relocation to the symbol's procedure linkage table.
|
547 |
|
|
FIXME: R_PPC64_PLTREL32 not supported. */
|
548 |
|
|
HOWTO (R_PPC64_PLTREL32, /* type */
|
549 |
|
|
0, /* rightshift */
|
550 |
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
551 |
|
|
32, /* bitsize */
|
552 |
|
|
true, /* pc_relative */
|
553 |
|
|
0, /* bitpos */
|
554 |
|
|
complain_overflow_signed, /* complain_on_overflow */
|
555 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
556 |
|
|
"R_PPC64_PLTREL32", /* name */
|
557 |
|
|
false, /* partial_inplace */
|
558 |
|
|
0, /* src_mask */
|
559 |
|
|
0xffffffff, /* dst_mask */
|
560 |
|
|
true), /* pcrel_offset */
|
561 |
|
|
|
562 |
|
|
/* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
|
563 |
|
|
the symbol. */
|
564 |
|
|
HOWTO (R_PPC64_PLT16_LO, /* type */
|
565 |
|
|
0, /* rightshift */
|
566 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
567 |
|
|
16, /* bitsize */
|
568 |
|
|
false, /* pc_relative */
|
569 |
|
|
0, /* bitpos */
|
570 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
571 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
572 |
|
|
"R_PPC64_PLT16_LO", /* name */
|
573 |
|
|
false, /* partial_inplace */
|
574 |
|
|
0, /* src_mask */
|
575 |
|
|
0xffff, /* dst_mask */
|
576 |
|
|
false), /* pcrel_offset */
|
577 |
|
|
|
578 |
|
|
/* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
|
579 |
|
|
the symbol. */
|
580 |
|
|
HOWTO (R_PPC64_PLT16_HI, /* type */
|
581 |
|
|
16, /* rightshift */
|
582 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
583 |
|
|
16, /* bitsize */
|
584 |
|
|
false, /* pc_relative */
|
585 |
|
|
0, /* bitpos */
|
586 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
587 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
588 |
|
|
"R_PPC64_PLT16_HI", /* name */
|
589 |
|
|
false, /* partial_inplace */
|
590 |
|
|
0, /* src_mask */
|
591 |
|
|
0xffff, /* dst_mask */
|
592 |
|
|
false), /* pcrel_offset */
|
593 |
|
|
|
594 |
|
|
/* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
|
595 |
|
|
the symbol. */
|
596 |
|
|
HOWTO (R_PPC64_PLT16_HA, /* type */
|
597 |
|
|
16, /* rightshift */
|
598 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
599 |
|
|
16, /* bitsize */
|
600 |
|
|
false, /* pc_relative */
|
601 |
|
|
0, /* bitpos */
|
602 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
603 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
604 |
|
|
"R_PPC64_PLT16_HA", /* name */
|
605 |
|
|
false, /* partial_inplace */
|
606 |
|
|
0, /* src_mask */
|
607 |
|
|
0xffff, /* dst_mask */
|
608 |
|
|
false), /* pcrel_offset */
|
609 |
|
|
|
610 |
|
|
/* 16-bit section relative relocation. */
|
611 |
|
|
HOWTO (R_PPC64_SECTOFF, /* type */
|
612 |
|
|
0, /* rightshift */
|
613 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
614 |
|
|
16, /* bitsize */
|
615 |
|
|
false, /* pc_relative */
|
616 |
|
|
0, /* bitpos */
|
617 |
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
618 |
|
|
ppc64_elf_sectoff_reloc, /* special_function */
|
619 |
|
|
"R_PPC64_SECTOFF", /* name */
|
620 |
|
|
false, /* partial_inplace */
|
621 |
|
|
0, /* src_mask */
|
622 |
|
|
0xffff, /* dst_mask */
|
623 |
|
|
false), /* pcrel_offset */
|
624 |
|
|
|
625 |
|
|
/* Like R_PPC64_SECTOFF, but no overflow warning. */
|
626 |
|
|
HOWTO (R_PPC64_SECTOFF_LO, /* type */
|
627 |
|
|
0, /* rightshift */
|
628 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
629 |
|
|
16, /* bitsize */
|
630 |
|
|
false, /* pc_relative */
|
631 |
|
|
0, /* bitpos */
|
632 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
633 |
|
|
ppc64_elf_sectoff_reloc, /* special_function */
|
634 |
|
|
"R_PPC64_SECTOFF_LO", /* name */
|
635 |
|
|
false, /* partial_inplace */
|
636 |
|
|
0, /* src_mask */
|
637 |
|
|
0xffff, /* dst_mask */
|
638 |
|
|
false), /* pcrel_offset */
|
639 |
|
|
|
640 |
|
|
/* 16-bit upper half section relative relocation. */
|
641 |
|
|
HOWTO (R_PPC64_SECTOFF_HI, /* type */
|
642 |
|
|
16, /* rightshift */
|
643 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
644 |
|
|
16, /* bitsize */
|
645 |
|
|
false, /* pc_relative */
|
646 |
|
|
0, /* bitpos */
|
647 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
648 |
|
|
ppc64_elf_sectoff_reloc, /* special_function */
|
649 |
|
|
"R_PPC64_SECTOFF_HI", /* name */
|
650 |
|
|
false, /* partial_inplace */
|
651 |
|
|
0, /* src_mask */
|
652 |
|
|
0xffff, /* dst_mask */
|
653 |
|
|
false), /* pcrel_offset */
|
654 |
|
|
|
655 |
|
|
/* 16-bit upper half adjusted section relative relocation. */
|
656 |
|
|
HOWTO (R_PPC64_SECTOFF_HA, /* type */
|
657 |
|
|
16, /* rightshift */
|
658 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
659 |
|
|
16, /* bitsize */
|
660 |
|
|
false, /* pc_relative */
|
661 |
|
|
0, /* bitpos */
|
662 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
663 |
|
|
ppc64_elf_sectoff_ha_reloc, /* special_function */
|
664 |
|
|
"R_PPC64_SECTOFF_HA", /* name */
|
665 |
|
|
false, /* partial_inplace */
|
666 |
|
|
0, /* src_mask */
|
667 |
|
|
0xffff, /* dst_mask */
|
668 |
|
|
false), /* pcrel_offset */
|
669 |
|
|
|
670 |
|
|
/* Like R_PPC64_REL24 without touching the two least significant
|
671 |
|
|
bits. Should have been named R_PPC64_REL30! */
|
672 |
|
|
HOWTO (R_PPC64_ADDR30, /* type */
|
673 |
|
|
2, /* rightshift */
|
674 |
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
675 |
|
|
30, /* bitsize */
|
676 |
|
|
true, /* pc_relative */
|
677 |
|
|
0, /* bitpos */
|
678 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
679 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
680 |
|
|
"R_PPC64_ADDR30", /* name */
|
681 |
|
|
false, /* partial_inplace */
|
682 |
|
|
0, /* src_mask */
|
683 |
|
|
0xfffffffc, /* dst_mask */
|
684 |
|
|
true), /* pcrel_offset */
|
685 |
|
|
|
686 |
|
|
/* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
|
687 |
|
|
|
688 |
|
|
/* A standard 64-bit relocation. */
|
689 |
|
|
HOWTO (R_PPC64_ADDR64, /* type */
|
690 |
|
|
0, /* rightshift */
|
691 |
|
|
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
692 |
|
|
64, /* bitsize */
|
693 |
|
|
false, /* pc_relative */
|
694 |
|
|
0, /* bitpos */
|
695 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
696 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
697 |
|
|
"R_PPC64_ADDR64", /* name */
|
698 |
|
|
false, /* partial_inplace */
|
699 |
|
|
0, /* src_mask */
|
700 |
|
|
ONES (64), /* dst_mask */
|
701 |
|
|
false), /* pcrel_offset */
|
702 |
|
|
|
703 |
|
|
/* The bits 32-47 of an address. */
|
704 |
|
|
HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
|
705 |
|
|
32, /* rightshift */
|
706 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
707 |
|
|
16, /* bitsize */
|
708 |
|
|
false, /* pc_relative */
|
709 |
|
|
0, /* bitpos */
|
710 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
711 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
712 |
|
|
"R_PPC64_ADDR16_HIGHER", /* name */
|
713 |
|
|
false, /* partial_inplace */
|
714 |
|
|
0, /* src_mask */
|
715 |
|
|
0xffff, /* dst_mask */
|
716 |
|
|
false), /* pcrel_offset */
|
717 |
|
|
|
718 |
|
|
/* The bits 32-47 of an address, plus 1 if the contents of the low
|
719 |
|
|
16 bits, treated as a signed number, is negative. */
|
720 |
|
|
HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
|
721 |
|
|
32, /* rightshift */
|
722 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
723 |
|
|
16, /* bitsize */
|
724 |
|
|
false, /* pc_relative */
|
725 |
|
|
0, /* bitpos */
|
726 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
727 |
|
|
ppc64_elf_ha_reloc, /* special_function */
|
728 |
|
|
"R_PPC64_ADDR16_HIGHERA", /* name */
|
729 |
|
|
false, /* partial_inplace */
|
730 |
|
|
0, /* src_mask */
|
731 |
|
|
0xffff, /* dst_mask */
|
732 |
|
|
false), /* pcrel_offset */
|
733 |
|
|
|
734 |
|
|
/* The bits 48-63 of an address. */
|
735 |
|
|
HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
|
736 |
|
|
48, /* rightshift */
|
737 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
738 |
|
|
16, /* bitsize */
|
739 |
|
|
false, /* pc_relative */
|
740 |
|
|
0, /* bitpos */
|
741 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
742 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
743 |
|
|
"R_PPC64_ADDR16_HIGHEST", /* name */
|
744 |
|
|
false, /* partial_inplace */
|
745 |
|
|
0, /* src_mask */
|
746 |
|
|
0xffff, /* dst_mask */
|
747 |
|
|
false), /* pcrel_offset */
|
748 |
|
|
|
749 |
|
|
/* The bits 48-63 of an address, plus 1 if the contents of the low
|
750 |
|
|
16 bits, treated as a signed number, is negative. */
|
751 |
|
|
HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
|
752 |
|
|
48, /* rightshift */
|
753 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
754 |
|
|
16, /* bitsize */
|
755 |
|
|
false, /* pc_relative */
|
756 |
|
|
0, /* bitpos */
|
757 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
758 |
|
|
ppc64_elf_ha_reloc, /* special_function */
|
759 |
|
|
"R_PPC64_ADDR16_HIGHESTA", /* name */
|
760 |
|
|
false, /* partial_inplace */
|
761 |
|
|
0, /* src_mask */
|
762 |
|
|
0xffff, /* dst_mask */
|
763 |
|
|
false), /* pcrel_offset */
|
764 |
|
|
|
765 |
|
|
/* Like ADDR64, but may be unaligned. */
|
766 |
|
|
HOWTO (R_PPC64_UADDR64, /* type */
|
767 |
|
|
0, /* rightshift */
|
768 |
|
|
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
769 |
|
|
64, /* bitsize */
|
770 |
|
|
false, /* pc_relative */
|
771 |
|
|
0, /* bitpos */
|
772 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
773 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
774 |
|
|
"R_PPC64_UADDR64", /* name */
|
775 |
|
|
false, /* partial_inplace */
|
776 |
|
|
0, /* src_mask */
|
777 |
|
|
ONES (64), /* dst_mask */
|
778 |
|
|
false), /* pcrel_offset */
|
779 |
|
|
|
780 |
|
|
/* 64-bit relative relocation. */
|
781 |
|
|
HOWTO (R_PPC64_REL64, /* type */
|
782 |
|
|
0, /* rightshift */
|
783 |
|
|
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
784 |
|
|
64, /* bitsize */
|
785 |
|
|
true, /* pc_relative */
|
786 |
|
|
0, /* bitpos */
|
787 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
788 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
789 |
|
|
"R_PPC64_REL64", /* name */
|
790 |
|
|
false, /* partial_inplace */
|
791 |
|
|
0, /* src_mask */
|
792 |
|
|
ONES (64), /* dst_mask */
|
793 |
|
|
true), /* pcrel_offset */
|
794 |
|
|
|
795 |
|
|
/* 64-bit relocation to the symbol's procedure linkage table. */
|
796 |
|
|
HOWTO (R_PPC64_PLT64, /* type */
|
797 |
|
|
0, /* rightshift */
|
798 |
|
|
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
799 |
|
|
64, /* bitsize */
|
800 |
|
|
false, /* pc_relative */
|
801 |
|
|
0, /* bitpos */
|
802 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
803 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
804 |
|
|
"R_PPC64_PLT64", /* name */
|
805 |
|
|
false, /* partial_inplace */
|
806 |
|
|
0, /* src_mask */
|
807 |
|
|
ONES (64), /* dst_mask */
|
808 |
|
|
false), /* pcrel_offset */
|
809 |
|
|
|
810 |
|
|
/* 64-bit PC relative relocation to the symbol's procedure linkage
|
811 |
|
|
table. */
|
812 |
|
|
/* FIXME: R_PPC64_PLTREL64 not supported. */
|
813 |
|
|
HOWTO (R_PPC64_PLTREL64, /* type */
|
814 |
|
|
0, /* rightshift */
|
815 |
|
|
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
816 |
|
|
64, /* bitsize */
|
817 |
|
|
true, /* pc_relative */
|
818 |
|
|
0, /* bitpos */
|
819 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
820 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
821 |
|
|
"R_PPC64_PLTREL64", /* name */
|
822 |
|
|
false, /* partial_inplace */
|
823 |
|
|
0, /* src_mask */
|
824 |
|
|
ONES (64), /* dst_mask */
|
825 |
|
|
true), /* pcrel_offset */
|
826 |
|
|
|
827 |
|
|
/* 16 bit TOC-relative relocation. */
|
828 |
|
|
|
829 |
|
|
/* R_PPC64_TOC16 47 half16* S + A - .TOC. */
|
830 |
|
|
HOWTO (R_PPC64_TOC16, /* type */
|
831 |
|
|
0, /* rightshift */
|
832 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
833 |
|
|
16, /* bitsize */
|
834 |
|
|
false, /* pc_relative */
|
835 |
|
|
0, /* bitpos */
|
836 |
|
|
complain_overflow_signed, /* complain_on_overflow */
|
837 |
|
|
ppc64_elf_toc_reloc, /* special_function */
|
838 |
|
|
"R_PPC64_TOC16", /* name */
|
839 |
|
|
false, /* partial_inplace */
|
840 |
|
|
0, /* src_mask */
|
841 |
|
|
0xffff, /* dst_mask */
|
842 |
|
|
false), /* pcrel_offset */
|
843 |
|
|
|
844 |
|
|
/* 16 bit TOC-relative relocation without overflow. */
|
845 |
|
|
|
846 |
|
|
/* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
|
847 |
|
|
HOWTO (R_PPC64_TOC16_LO, /* type */
|
848 |
|
|
0, /* rightshift */
|
849 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
850 |
|
|
16, /* bitsize */
|
851 |
|
|
false, /* pc_relative */
|
852 |
|
|
0, /* bitpos */
|
853 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
854 |
|
|
ppc64_elf_toc_reloc, /* special_function */
|
855 |
|
|
"R_PPC64_TOC16_LO", /* name */
|
856 |
|
|
false, /* partial_inplace */
|
857 |
|
|
0, /* src_mask */
|
858 |
|
|
0xffff, /* dst_mask */
|
859 |
|
|
false), /* pcrel_offset */
|
860 |
|
|
|
861 |
|
|
/* 16 bit TOC-relative relocation, high 16 bits. */
|
862 |
|
|
|
863 |
|
|
/* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
|
864 |
|
|
HOWTO (R_PPC64_TOC16_HI, /* type */
|
865 |
|
|
16, /* rightshift */
|
866 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
867 |
|
|
16, /* bitsize */
|
868 |
|
|
false, /* pc_relative */
|
869 |
|
|
0, /* bitpos */
|
870 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
871 |
|
|
ppc64_elf_toc_reloc, /* special_function */
|
872 |
|
|
"R_PPC64_TOC16_HI", /* name */
|
873 |
|
|
false, /* partial_inplace */
|
874 |
|
|
0, /* src_mask */
|
875 |
|
|
0xffff, /* dst_mask */
|
876 |
|
|
false), /* pcrel_offset */
|
877 |
|
|
|
878 |
|
|
/* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
|
879 |
|
|
contents of the low 16 bits, treated as a signed number, is
|
880 |
|
|
negative. */
|
881 |
|
|
|
882 |
|
|
/* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
|
883 |
|
|
HOWTO (R_PPC64_TOC16_HA, /* type */
|
884 |
|
|
16, /* rightshift */
|
885 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
886 |
|
|
16, /* bitsize */
|
887 |
|
|
false, /* pc_relative */
|
888 |
|
|
0, /* bitpos */
|
889 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
890 |
|
|
ppc64_elf_toc_ha_reloc, /* special_function */
|
891 |
|
|
"R_PPC64_TOC16_HA", /* name */
|
892 |
|
|
false, /* partial_inplace */
|
893 |
|
|
0, /* src_mask */
|
894 |
|
|
0xffff, /* dst_mask */
|
895 |
|
|
false), /* pcrel_offset */
|
896 |
|
|
|
897 |
|
|
/* 64-bit relocation; insert value of TOC base (.TOC.). */
|
898 |
|
|
|
899 |
|
|
/* R_PPC64_TOC 51 doubleword64 .TOC. */
|
900 |
|
|
HOWTO (R_PPC64_TOC, /* type */
|
901 |
|
|
0, /* rightshift */
|
902 |
|
|
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
|
903 |
|
|
64, /* bitsize */
|
904 |
|
|
false, /* pc_relative */
|
905 |
|
|
0, /* bitpos */
|
906 |
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
907 |
|
|
ppc64_elf_toc64_reloc, /* special_function */
|
908 |
|
|
"R_PPC64_TOC", /* name */
|
909 |
|
|
false, /* partial_inplace */
|
910 |
|
|
0, /* src_mask */
|
911 |
|
|
ONES (64), /* dst_mask */
|
912 |
|
|
false), /* pcrel_offset */
|
913 |
|
|
|
914 |
|
|
/* Like R_PPC64_GOT16, but also informs the link editor that the
|
915 |
|
|
value to relocate may (!) refer to a PLT entry which the link
|
916 |
|
|
editor (a) may replace with the symbol value. If the link editor
|
917 |
|
|
is unable to fully resolve the symbol, it may (b) create a PLT
|
918 |
|
|
entry and store the address to the new PLT entry in the GOT.
|
919 |
|
|
This permits lazy resolution of function symbols at run time.
|
920 |
|
|
The link editor may also skip all of this and just (c) emit a
|
921 |
|
|
R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
|
922 |
|
|
/* FIXME: R_PPC64_PLTGOT16 not implemented. */
|
923 |
|
|
HOWTO (R_PPC64_PLTGOT16, /* type */
|
924 |
|
|
0, /* rightshift */
|
925 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
926 |
|
|
16, /* bitsize */
|
927 |
|
|
false, /* pc_relative */
|
928 |
|
|
0, /* bitpos */
|
929 |
|
|
complain_overflow_signed, /* complain_on_overflow */
|
930 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
931 |
|
|
"R_PPC64_PLTGOT16", /* name */
|
932 |
|
|
false, /* partial_inplace */
|
933 |
|
|
0, /* src_mask */
|
934 |
|
|
0xffff, /* dst_mask */
|
935 |
|
|
false), /* pcrel_offset */
|
936 |
|
|
|
937 |
|
|
/* Like R_PPC64_PLTGOT16, but without overflow. */
|
938 |
|
|
/* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
|
939 |
|
|
HOWTO (R_PPC64_PLTGOT16_LO, /* type */
|
940 |
|
|
0, /* rightshift */
|
941 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
942 |
|
|
16, /* bitsize */
|
943 |
|
|
false, /* pc_relative */
|
944 |
|
|
0, /* bitpos */
|
945 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
946 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
947 |
|
|
"R_PPC64_PLTGOT16_LO", /* name */
|
948 |
|
|
false, /* partial_inplace */
|
949 |
|
|
0, /* src_mask */
|
950 |
|
|
0xffff, /* dst_mask */
|
951 |
|
|
false), /* pcrel_offset */
|
952 |
|
|
|
953 |
|
|
/* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
|
954 |
|
|
/* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
|
955 |
|
|
HOWTO (R_PPC64_PLTGOT16_HI, /* type */
|
956 |
|
|
16, /* rightshift */
|
957 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
958 |
|
|
16, /* bitsize */
|
959 |
|
|
false, /* pc_relative */
|
960 |
|
|
0, /* bitpos */
|
961 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
962 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
963 |
|
|
"R_PPC64_PLTGOT16_HI", /* name */
|
964 |
|
|
false, /* partial_inplace */
|
965 |
|
|
0, /* src_mask */
|
966 |
|
|
0xffff, /* dst_mask */
|
967 |
|
|
false), /* pcrel_offset */
|
968 |
|
|
|
969 |
|
|
/* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
|
970 |
|
|
1 if the contents of the low 16 bits, treated as a signed number,
|
971 |
|
|
is negative. */
|
972 |
|
|
/* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
|
973 |
|
|
HOWTO (R_PPC64_PLTGOT16_HA, /* type */
|
974 |
|
|
16, /* rightshift */
|
975 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
976 |
|
|
16, /* bitsize */
|
977 |
|
|
false, /* pc_relative */
|
978 |
|
|
0, /* bitpos */
|
979 |
|
|
complain_overflow_dont,/* complain_on_overflow */
|
980 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
981 |
|
|
"R_PPC64_PLTGOT16_HA", /* name */
|
982 |
|
|
false, /* partial_inplace */
|
983 |
|
|
0, /* src_mask */
|
984 |
|
|
0xffff, /* dst_mask */
|
985 |
|
|
false), /* pcrel_offset */
|
986 |
|
|
|
987 |
|
|
/* Like R_PPC64_ADDR16, but for instructions with a DS field. */
|
988 |
|
|
HOWTO (R_PPC64_ADDR16_DS, /* type */
|
989 |
|
|
0, /* rightshift */
|
990 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
991 |
|
|
16, /* bitsize */
|
992 |
|
|
false, /* pc_relative */
|
993 |
|
|
0, /* bitpos */
|
994 |
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
995 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
996 |
|
|
"R_PPC64_ADDR16_DS", /* name */
|
997 |
|
|
false, /* partial_inplace */
|
998 |
|
|
0, /* src_mask */
|
999 |
|
|
0xfffc, /* dst_mask */
|
1000 |
|
|
false), /* pcrel_offset */
|
1001 |
|
|
|
1002 |
|
|
/* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
|
1003 |
|
|
HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
|
1004 |
|
|
0, /* rightshift */
|
1005 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
1006 |
|
|
16, /* bitsize */
|
1007 |
|
|
false, /* pc_relative */
|
1008 |
|
|
0, /* bitpos */
|
1009 |
|
|
complain_overflow_dont,/* complain_on_overflow */
|
1010 |
|
|
bfd_elf_generic_reloc, /* special_function */
|
1011 |
|
|
"R_PPC64_ADDR16_LO_DS",/* name */
|
1012 |
|
|
false, /* partial_inplace */
|
1013 |
|
|
0, /* src_mask */
|
1014 |
|
|
0xfffc, /* dst_mask */
|
1015 |
|
|
false), /* pcrel_offset */
|
1016 |
|
|
|
1017 |
|
|
/* Like R_PPC64_GOT16, but for instructions with a DS field. */
|
1018 |
|
|
HOWTO (R_PPC64_GOT16_DS, /* type */
|
1019 |
|
|
0, /* rightshift */
|
1020 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
1021 |
|
|
16, /* bitsize */
|
1022 |
|
|
false, /* pc_relative */
|
1023 |
|
|
0, /* bitpos */
|
1024 |
|
|
complain_overflow_signed, /* complain_on_overflow */
|
1025 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
1026 |
|
|
"R_PPC64_GOT16_DS", /* name */
|
1027 |
|
|
false, /* partial_inplace */
|
1028 |
|
|
0, /* src_mask */
|
1029 |
|
|
0xfffc, /* dst_mask */
|
1030 |
|
|
false), /* pcrel_offset */
|
1031 |
|
|
|
1032 |
|
|
/* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
|
1033 |
|
|
HOWTO (R_PPC64_GOT16_LO_DS, /* type */
|
1034 |
|
|
0, /* rightshift */
|
1035 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
1036 |
|
|
16, /* bitsize */
|
1037 |
|
|
false, /* pc_relative */
|
1038 |
|
|
0, /* bitpos */
|
1039 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
1040 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
1041 |
|
|
"R_PPC64_GOT16_LO_DS", /* name */
|
1042 |
|
|
false, /* partial_inplace */
|
1043 |
|
|
0, /* src_mask */
|
1044 |
|
|
0xfffc, /* dst_mask */
|
1045 |
|
|
false), /* pcrel_offset */
|
1046 |
|
|
|
1047 |
|
|
/* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
|
1048 |
|
|
HOWTO (R_PPC64_PLT16_LO_DS, /* type */
|
1049 |
|
|
0, /* rightshift */
|
1050 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
1051 |
|
|
16, /* bitsize */
|
1052 |
|
|
false, /* pc_relative */
|
1053 |
|
|
0, /* bitpos */
|
1054 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
1055 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
1056 |
|
|
"R_PPC64_PLT16_LO_DS", /* name */
|
1057 |
|
|
false, /* partial_inplace */
|
1058 |
|
|
0, /* src_mask */
|
1059 |
|
|
0xfffc, /* dst_mask */
|
1060 |
|
|
false), /* pcrel_offset */
|
1061 |
|
|
|
1062 |
|
|
/* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
|
1063 |
|
|
HOWTO (R_PPC64_SECTOFF_DS, /* type */
|
1064 |
|
|
0, /* rightshift */
|
1065 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
1066 |
|
|
16, /* bitsize */
|
1067 |
|
|
false, /* pc_relative */
|
1068 |
|
|
0, /* bitpos */
|
1069 |
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
1070 |
|
|
ppc64_elf_sectoff_reloc, /* special_function */
|
1071 |
|
|
"R_PPC64_SECTOFF_DS", /* name */
|
1072 |
|
|
false, /* partial_inplace */
|
1073 |
|
|
0, /* src_mask */
|
1074 |
|
|
0xfffc, /* dst_mask */
|
1075 |
|
|
false), /* pcrel_offset */
|
1076 |
|
|
|
1077 |
|
|
/* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
|
1078 |
|
|
HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
|
1079 |
|
|
0, /* rightshift */
|
1080 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
1081 |
|
|
16, /* bitsize */
|
1082 |
|
|
false, /* pc_relative */
|
1083 |
|
|
0, /* bitpos */
|
1084 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
1085 |
|
|
ppc64_elf_sectoff_reloc, /* special_function */
|
1086 |
|
|
"R_PPC64_SECTOFF_LO_DS",/* name */
|
1087 |
|
|
false, /* partial_inplace */
|
1088 |
|
|
0, /* src_mask */
|
1089 |
|
|
0xfffc, /* dst_mask */
|
1090 |
|
|
false), /* pcrel_offset */
|
1091 |
|
|
|
1092 |
|
|
/* Like R_PPC64_TOC16, but for instructions with a DS field. */
|
1093 |
|
|
HOWTO (R_PPC64_TOC16_DS, /* type */
|
1094 |
|
|
0, /* rightshift */
|
1095 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
1096 |
|
|
16, /* bitsize */
|
1097 |
|
|
false, /* pc_relative */
|
1098 |
|
|
0, /* bitpos */
|
1099 |
|
|
complain_overflow_signed, /* complain_on_overflow */
|
1100 |
|
|
ppc64_elf_toc_reloc, /* special_function */
|
1101 |
|
|
"R_PPC64_TOC16_DS", /* name */
|
1102 |
|
|
false, /* partial_inplace */
|
1103 |
|
|
0, /* src_mask */
|
1104 |
|
|
0xfffc, /* dst_mask */
|
1105 |
|
|
false), /* pcrel_offset */
|
1106 |
|
|
|
1107 |
|
|
/* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
|
1108 |
|
|
HOWTO (R_PPC64_TOC16_LO_DS, /* type */
|
1109 |
|
|
0, /* rightshift */
|
1110 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
1111 |
|
|
16, /* bitsize */
|
1112 |
|
|
false, /* pc_relative */
|
1113 |
|
|
0, /* bitpos */
|
1114 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
1115 |
|
|
ppc64_elf_toc_reloc, /* special_function */
|
1116 |
|
|
"R_PPC64_TOC16_LO_DS", /* name */
|
1117 |
|
|
false, /* partial_inplace */
|
1118 |
|
|
0, /* src_mask */
|
1119 |
|
|
0xfffc, /* dst_mask */
|
1120 |
|
|
false), /* pcrel_offset */
|
1121 |
|
|
|
1122 |
|
|
/* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
|
1123 |
|
|
/* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
|
1124 |
|
|
HOWTO (R_PPC64_PLTGOT16_DS, /* type */
|
1125 |
|
|
0, /* rightshift */
|
1126 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
1127 |
|
|
16, /* bitsize */
|
1128 |
|
|
false, /* pc_relative */
|
1129 |
|
|
0, /* bitpos */
|
1130 |
|
|
complain_overflow_signed, /* complain_on_overflow */
|
1131 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
1132 |
|
|
"R_PPC64_PLTGOT16_DS", /* name */
|
1133 |
|
|
false, /* partial_inplace */
|
1134 |
|
|
0, /* src_mask */
|
1135 |
|
|
0xfffc, /* dst_mask */
|
1136 |
|
|
false), /* pcrel_offset */
|
1137 |
|
|
|
1138 |
|
|
/* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
|
1139 |
|
|
/* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
|
1140 |
|
|
HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
|
1141 |
|
|
0, /* rightshift */
|
1142 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
1143 |
|
|
16, /* bitsize */
|
1144 |
|
|
false, /* pc_relative */
|
1145 |
|
|
0, /* bitpos */
|
1146 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
1147 |
|
|
ppc64_elf_unhandled_reloc, /* special_function */
|
1148 |
|
|
"R_PPC64_PLTGOT16_LO_DS",/* name */
|
1149 |
|
|
false, /* partial_inplace */
|
1150 |
|
|
0, /* src_mask */
|
1151 |
|
|
0xfffc, /* dst_mask */
|
1152 |
|
|
false), /* pcrel_offset */
|
1153 |
|
|
|
1154 |
|
|
/* GNU extension to record C++ vtable hierarchy. */
|
1155 |
|
|
HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
|
1156 |
|
|
0, /* rightshift */
|
1157 |
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
1158 |
|
|
0, /* bitsize */
|
1159 |
|
|
false, /* pc_relative */
|
1160 |
|
|
0, /* bitpos */
|
1161 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
1162 |
|
|
NULL, /* special_function */
|
1163 |
|
|
"R_PPC64_GNU_VTINHERIT", /* name */
|
1164 |
|
|
false, /* partial_inplace */
|
1165 |
|
|
0, /* src_mask */
|
1166 |
|
|
0, /* dst_mask */
|
1167 |
|
|
false), /* pcrel_offset */
|
1168 |
|
|
|
1169 |
|
|
/* GNU extension to record C++ vtable member usage. */
|
1170 |
|
|
HOWTO (R_PPC64_GNU_VTENTRY, /* type */
|
1171 |
|
|
0, /* rightshift */
|
1172 |
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
1173 |
|
|
0, /* bitsize */
|
1174 |
|
|
false, /* pc_relative */
|
1175 |
|
|
0, /* bitpos */
|
1176 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
1177 |
|
|
NULL, /* special_function */
|
1178 |
|
|
"R_PPC64_GNU_VTENTRY", /* name */
|
1179 |
|
|
false, /* partial_inplace */
|
1180 |
|
|
0, /* src_mask */
|
1181 |
|
|
0, /* dst_mask */
|
1182 |
|
|
false), /* pcrel_offset */
|
1183 |
|
|
};
|
1184 |
|
|
|
1185 |
|
|
|
1186 |
|
|
/* Initialize the ppc64_elf_howto_table, so that linear accesses can
|
1187 |
|
|
be done. */
|
1188 |
|
|
|
1189 |
|
|
static void
|
1190 |
|
|
ppc_howto_init ()
|
1191 |
|
|
{
|
1192 |
|
|
unsigned int i, type;
|
1193 |
|
|
|
1194 |
|
|
for (i = 0;
|
1195 |
|
|
i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
|
1196 |
|
|
i++)
|
1197 |
|
|
{
|
1198 |
|
|
type = ppc64_elf_howto_raw[i].type;
|
1199 |
|
|
BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
|
1200 |
|
|
/ sizeof (ppc64_elf_howto_table[0])));
|
1201 |
|
|
ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
|
1202 |
|
|
}
|
1203 |
|
|
}
|
1204 |
|
|
|
1205 |
|
|
static reloc_howto_type *
|
1206 |
|
|
ppc64_elf_reloc_type_lookup (abfd, code)
|
1207 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
1208 |
|
|
bfd_reloc_code_real_type code;
|
1209 |
|
|
{
|
1210 |
|
|
enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE;
|
1211 |
|
|
|
1212 |
|
|
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
|
1213 |
|
|
/* Initialize howto table if needed. */
|
1214 |
|
|
ppc_howto_init ();
|
1215 |
|
|
|
1216 |
|
|
switch ((int) code)
|
1217 |
|
|
{
|
1218 |
|
|
default:
|
1219 |
|
|
return (reloc_howto_type *) NULL;
|
1220 |
|
|
|
1221 |
|
|
case BFD_RELOC_NONE: ppc_reloc = R_PPC64_NONE;
|
1222 |
|
|
break;
|
1223 |
|
|
case BFD_RELOC_32: ppc_reloc = R_PPC64_ADDR32;
|
1224 |
|
|
break;
|
1225 |
|
|
case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC64_ADDR24;
|
1226 |
|
|
break;
|
1227 |
|
|
case BFD_RELOC_16: ppc_reloc = R_PPC64_ADDR16;
|
1228 |
|
|
break;
|
1229 |
|
|
case BFD_RELOC_LO16: ppc_reloc = R_PPC64_ADDR16_LO;
|
1230 |
|
|
break;
|
1231 |
|
|
case BFD_RELOC_HI16: ppc_reloc = R_PPC64_ADDR16_HI;
|
1232 |
|
|
break;
|
1233 |
|
|
case BFD_RELOC_HI16_S: ppc_reloc = R_PPC64_ADDR16_HA;
|
1234 |
|
|
break;
|
1235 |
|
|
case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC64_ADDR14;
|
1236 |
|
|
break;
|
1237 |
|
|
case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC64_ADDR14_BRTAKEN;
|
1238 |
|
|
break;
|
1239 |
|
|
case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC64_ADDR14_BRNTAKEN;
|
1240 |
|
|
break;
|
1241 |
|
|
case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC64_REL24;
|
1242 |
|
|
break;
|
1243 |
|
|
case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC64_REL14;
|
1244 |
|
|
break;
|
1245 |
|
|
case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC64_REL14_BRTAKEN;
|
1246 |
|
|
break;
|
1247 |
|
|
case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC64_REL14_BRNTAKEN;
|
1248 |
|
|
break;
|
1249 |
|
|
case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC64_GOT16;
|
1250 |
|
|
break;
|
1251 |
|
|
case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC64_GOT16_LO;
|
1252 |
|
|
break;
|
1253 |
|
|
case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC64_GOT16_HI;
|
1254 |
|
|
break;
|
1255 |
|
|
case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC64_GOT16_HA;
|
1256 |
|
|
break;
|
1257 |
|
|
case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC64_COPY;
|
1258 |
|
|
break;
|
1259 |
|
|
case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC64_GLOB_DAT;
|
1260 |
|
|
break;
|
1261 |
|
|
case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC64_REL32;
|
1262 |
|
|
break;
|
1263 |
|
|
case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC64_PLT32;
|
1264 |
|
|
break;
|
1265 |
|
|
case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL32;
|
1266 |
|
|
break;
|
1267 |
|
|
case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC64_PLT16_LO;
|
1268 |
|
|
break;
|
1269 |
|
|
case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC64_PLT16_HI;
|
1270 |
|
|
break;
|
1271 |
|
|
case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC64_PLT16_HA;
|
1272 |
|
|
break;
|
1273 |
|
|
case BFD_RELOC_16_BASEREL: ppc_reloc = R_PPC64_SECTOFF;
|
1274 |
|
|
break;
|
1275 |
|
|
case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_LO;
|
1276 |
|
|
break;
|
1277 |
|
|
case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HI;
|
1278 |
|
|
break;
|
1279 |
|
|
case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HA;
|
1280 |
|
|
break;
|
1281 |
|
|
case BFD_RELOC_CTOR: ppc_reloc = R_PPC64_ADDR64;
|
1282 |
|
|
break;
|
1283 |
|
|
case BFD_RELOC_64: ppc_reloc = R_PPC64_ADDR64;
|
1284 |
|
|
break;
|
1285 |
|
|
case BFD_RELOC_PPC64_HIGHER: ppc_reloc = R_PPC64_ADDR16_HIGHER;
|
1286 |
|
|
break;
|
1287 |
|
|
case BFD_RELOC_PPC64_HIGHER_S: ppc_reloc = R_PPC64_ADDR16_HIGHERA;
|
1288 |
|
|
break;
|
1289 |
|
|
case BFD_RELOC_PPC64_HIGHEST: ppc_reloc = R_PPC64_ADDR16_HIGHEST;
|
1290 |
|
|
break;
|
1291 |
|
|
case BFD_RELOC_PPC64_HIGHEST_S: ppc_reloc = R_PPC64_ADDR16_HIGHESTA;
|
1292 |
|
|
break;
|
1293 |
|
|
case BFD_RELOC_64_PCREL: ppc_reloc = R_PPC64_REL64;
|
1294 |
|
|
break;
|
1295 |
|
|
case BFD_RELOC_64_PLTOFF: ppc_reloc = R_PPC64_PLT64;
|
1296 |
|
|
break;
|
1297 |
|
|
case BFD_RELOC_64_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL64;
|
1298 |
|
|
break;
|
1299 |
|
|
case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC64_TOC16;
|
1300 |
|
|
break;
|
1301 |
|
|
case BFD_RELOC_PPC64_TOC16_LO: ppc_reloc = R_PPC64_TOC16_LO;
|
1302 |
|
|
break;
|
1303 |
|
|
case BFD_RELOC_PPC64_TOC16_HI: ppc_reloc = R_PPC64_TOC16_HI;
|
1304 |
|
|
break;
|
1305 |
|
|
case BFD_RELOC_PPC64_TOC16_HA: ppc_reloc = R_PPC64_TOC16_HA;
|
1306 |
|
|
break;
|
1307 |
|
|
case BFD_RELOC_PPC64_TOC: ppc_reloc = R_PPC64_TOC;
|
1308 |
|
|
break;
|
1309 |
|
|
case BFD_RELOC_PPC64_PLTGOT16: ppc_reloc = R_PPC64_PLTGOT16;
|
1310 |
|
|
break;
|
1311 |
|
|
case BFD_RELOC_PPC64_PLTGOT16_LO: ppc_reloc = R_PPC64_PLTGOT16_LO;
|
1312 |
|
|
break;
|
1313 |
|
|
case BFD_RELOC_PPC64_PLTGOT16_HI: ppc_reloc = R_PPC64_PLTGOT16_HI;
|
1314 |
|
|
break;
|
1315 |
|
|
case BFD_RELOC_PPC64_PLTGOT16_HA: ppc_reloc = R_PPC64_PLTGOT16_HA;
|
1316 |
|
|
break;
|
1317 |
|
|
case BFD_RELOC_PPC64_ADDR16_DS: ppc_reloc = R_PPC64_ADDR16_DS;
|
1318 |
|
|
break;
|
1319 |
|
|
case BFD_RELOC_PPC64_ADDR16_LO_DS: ppc_reloc = R_PPC64_ADDR16_LO_DS;
|
1320 |
|
|
break;
|
1321 |
|
|
case BFD_RELOC_PPC64_GOT16_DS: ppc_reloc = R_PPC64_GOT16_DS;
|
1322 |
|
|
break;
|
1323 |
|
|
case BFD_RELOC_PPC64_GOT16_LO_DS: ppc_reloc = R_PPC64_GOT16_LO_DS;
|
1324 |
|
|
break;
|
1325 |
|
|
case BFD_RELOC_PPC64_PLT16_LO_DS: ppc_reloc = R_PPC64_PLT16_LO_DS;
|
1326 |
|
|
break;
|
1327 |
|
|
case BFD_RELOC_PPC64_SECTOFF_DS: ppc_reloc = R_PPC64_SECTOFF_DS;
|
1328 |
|
|
break;
|
1329 |
|
|
case BFD_RELOC_PPC64_SECTOFF_LO_DS: ppc_reloc = R_PPC64_SECTOFF_LO_DS;
|
1330 |
|
|
break;
|
1331 |
|
|
case BFD_RELOC_PPC64_TOC16_DS: ppc_reloc = R_PPC64_TOC16_DS;
|
1332 |
|
|
break;
|
1333 |
|
|
case BFD_RELOC_PPC64_TOC16_LO_DS: ppc_reloc = R_PPC64_TOC16_LO_DS;
|
1334 |
|
|
break;
|
1335 |
|
|
case BFD_RELOC_PPC64_PLTGOT16_DS: ppc_reloc = R_PPC64_PLTGOT16_DS;
|
1336 |
|
|
break;
|
1337 |
|
|
case BFD_RELOC_PPC64_PLTGOT16_LO_DS: ppc_reloc = R_PPC64_PLTGOT16_LO_DS;
|
1338 |
|
|
break;
|
1339 |
|
|
case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC64_GNU_VTINHERIT;
|
1340 |
|
|
break;
|
1341 |
|
|
case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC64_GNU_VTENTRY;
|
1342 |
|
|
break;
|
1343 |
|
|
}
|
1344 |
|
|
|
1345 |
|
|
return ppc64_elf_howto_table[(int) ppc_reloc];
|
1346 |
|
|
};
|
1347 |
|
|
|
1348 |
|
|
/* Set the howto pointer for a PowerPC ELF reloc. */
|
1349 |
|
|
|
1350 |
|
|
static void
|
1351 |
|
|
ppc64_elf_info_to_howto (abfd, cache_ptr, dst)
|
1352 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
1353 |
|
|
arelent *cache_ptr;
|
1354 |
|
|
Elf64_Internal_Rela *dst;
|
1355 |
|
|
{
|
1356 |
|
|
unsigned int type;
|
1357 |
|
|
|
1358 |
|
|
/* Initialize howto table if needed. */
|
1359 |
|
|
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
|
1360 |
|
|
ppc_howto_init ();
|
1361 |
|
|
|
1362 |
|
|
type = ELF64_R_TYPE (dst->r_info);
|
1363 |
|
|
BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
|
1364 |
|
|
/ sizeof (ppc64_elf_howto_table[0])));
|
1365 |
|
|
cache_ptr->howto = ppc64_elf_howto_table[type];
|
1366 |
|
|
}
|
1367 |
|
|
|
1368 |
|
|
/* Handle the R_PPC_ADDR16_HA and similar relocs. */
|
1369 |
|
|
|
1370 |
|
|
static bfd_reloc_status_type
|
1371 |
|
|
ppc64_elf_ha_reloc (abfd, reloc_entry, symbol, data,
|
1372 |
|
|
input_section, output_bfd, error_message)
|
1373 |
|
|
bfd *abfd;
|
1374 |
|
|
arelent *reloc_entry;
|
1375 |
|
|
asymbol *symbol;
|
1376 |
|
|
PTR data;
|
1377 |
|
|
asection *input_section;
|
1378 |
|
|
bfd *output_bfd;
|
1379 |
|
|
char **error_message;
|
1380 |
|
|
{
|
1381 |
|
|
/* If this is a relocatable link (output_bfd test tells us), just
|
1382 |
|
|
call the generic function. Any adjustment will be done at final
|
1383 |
|
|
link time. */
|
1384 |
|
|
if (output_bfd != NULL)
|
1385 |
|
|
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
1386 |
|
|
input_section, output_bfd, error_message);
|
1387 |
|
|
|
1388 |
|
|
/* Adjust the addend for sign extension of the low 16 bits.
|
1389 |
|
|
We won't actually be using the low 16 bits, so trashing them
|
1390 |
|
|
doesn't matter. */
|
1391 |
|
|
reloc_entry->addend += 0x8000;
|
1392 |
|
|
return bfd_reloc_continue;
|
1393 |
|
|
}
|
1394 |
|
|
|
1395 |
|
|
static bfd_reloc_status_type
|
1396 |
|
|
ppc64_elf_brtaken_reloc (abfd, reloc_entry, symbol, data,
|
1397 |
|
|
input_section, output_bfd, error_message)
|
1398 |
|
|
bfd *abfd;
|
1399 |
|
|
arelent *reloc_entry;
|
1400 |
|
|
asymbol *symbol;
|
1401 |
|
|
PTR data;
|
1402 |
|
|
asection *input_section;
|
1403 |
|
|
bfd *output_bfd;
|
1404 |
|
|
char **error_message;
|
1405 |
|
|
{
|
1406 |
|
|
long insn;
|
1407 |
|
|
enum elf_ppc_reloc_type r_type;
|
1408 |
|
|
bfd_size_type octets;
|
1409 |
|
|
/* Disabled until we sort out how ld should choose 'y' vs 'at'. */
|
1410 |
|
|
boolean is_power4 = false;
|
1411 |
|
|
|
1412 |
|
|
/* If this is a relocatable link (output_bfd test tells us), just
|
1413 |
|
|
call the generic function. Any adjustment will be done at final
|
1414 |
|
|
link time. */
|
1415 |
|
|
if (output_bfd != NULL)
|
1416 |
|
|
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
1417 |
|
|
input_section, output_bfd, error_message);
|
1418 |
|
|
|
1419 |
|
|
octets = reloc_entry->address * bfd_octets_per_byte (abfd);
|
1420 |
|
|
insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
|
1421 |
|
|
insn &= ~(0x01 << 21);
|
1422 |
|
|
r_type = (enum elf_ppc_reloc_type) reloc_entry->howto->type;
|
1423 |
|
|
if (r_type == R_PPC64_ADDR14_BRTAKEN
|
1424 |
|
|
|| r_type == R_PPC64_REL14_BRTAKEN)
|
1425 |
|
|
insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
|
1426 |
|
|
|
1427 |
|
|
if (is_power4)
|
1428 |
|
|
{
|
1429 |
|
|
/* Set 'a' bit. This is 0b00010 in BO field for branch
|
1430 |
|
|
on CR(BI) insns (BO == 001at or 011at), and 0b01000
|
1431 |
|
|
for branch on CTR insns (BO == 1a00t or 1a01t). */
|
1432 |
|
|
if ((insn & (0x14 << 21)) == (0x04 << 21))
|
1433 |
|
|
insn |= 0x02 << 21;
|
1434 |
|
|
else if ((insn & (0x14 << 21)) == (0x10 << 21))
|
1435 |
|
|
insn |= 0x08 << 21;
|
1436 |
|
|
else
|
1437 |
|
|
return bfd_reloc_continue;
|
1438 |
|
|
}
|
1439 |
|
|
else
|
1440 |
|
|
{
|
1441 |
|
|
bfd_vma target = 0;
|
1442 |
|
|
bfd_vma from;
|
1443 |
|
|
|
1444 |
|
|
if (!bfd_is_com_section (symbol->section))
|
1445 |
|
|
target = symbol->value;
|
1446 |
|
|
target += symbol->section->output_section->vma;
|
1447 |
|
|
target += symbol->section->output_offset;
|
1448 |
|
|
target += reloc_entry->addend;
|
1449 |
|
|
|
1450 |
|
|
from = (reloc_entry->address
|
1451 |
|
|
+ input_section->output_offset
|
1452 |
|
|
+ input_section->output_section->vma);
|
1453 |
|
|
|
1454 |
|
|
/* Invert 'y' bit if not the default. */
|
1455 |
|
|
if ((bfd_signed_vma) (target - from) < 0)
|
1456 |
|
|
insn ^= 0x01 << 21;
|
1457 |
|
|
}
|
1458 |
|
|
bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + octets);
|
1459 |
|
|
return bfd_reloc_continue;
|
1460 |
|
|
}
|
1461 |
|
|
|
1462 |
|
|
static bfd_reloc_status_type
|
1463 |
|
|
ppc64_elf_sectoff_reloc (abfd, reloc_entry, symbol, data,
|
1464 |
|
|
input_section, output_bfd, error_message)
|
1465 |
|
|
bfd *abfd;
|
1466 |
|
|
arelent *reloc_entry;
|
1467 |
|
|
asymbol *symbol;
|
1468 |
|
|
PTR data;
|
1469 |
|
|
asection *input_section;
|
1470 |
|
|
bfd *output_bfd;
|
1471 |
|
|
char **error_message;
|
1472 |
|
|
{
|
1473 |
|
|
/* If this is a relocatable link (output_bfd test tells us), just
|
1474 |
|
|
call the generic function. Any adjustment will be done at final
|
1475 |
|
|
link time. */
|
1476 |
|
|
if (output_bfd != NULL)
|
1477 |
|
|
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
1478 |
|
|
input_section, output_bfd, error_message);
|
1479 |
|
|
|
1480 |
|
|
/* Subtract the symbol section base address. */
|
1481 |
|
|
reloc_entry->addend -= symbol->section->output_section->vma;
|
1482 |
|
|
return bfd_reloc_continue;
|
1483 |
|
|
}
|
1484 |
|
|
|
1485 |
|
|
static bfd_reloc_status_type
|
1486 |
|
|
ppc64_elf_sectoff_ha_reloc (abfd, reloc_entry, symbol, data,
|
1487 |
|
|
input_section, output_bfd, error_message)
|
1488 |
|
|
bfd *abfd;
|
1489 |
|
|
arelent *reloc_entry;
|
1490 |
|
|
asymbol *symbol;
|
1491 |
|
|
PTR data;
|
1492 |
|
|
asection *input_section;
|
1493 |
|
|
bfd *output_bfd;
|
1494 |
|
|
char **error_message;
|
1495 |
|
|
{
|
1496 |
|
|
/* If this is a relocatable link (output_bfd test tells us), just
|
1497 |
|
|
call the generic function. Any adjustment will be done at final
|
1498 |
|
|
link time. */
|
1499 |
|
|
if (output_bfd != NULL)
|
1500 |
|
|
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
1501 |
|
|
input_section, output_bfd, error_message);
|
1502 |
|
|
|
1503 |
|
|
/* Subtract the symbol section base address. */
|
1504 |
|
|
reloc_entry->addend -= symbol->section->output_section->vma;
|
1505 |
|
|
|
1506 |
|
|
/* Adjust the addend for sign extension of the low 16 bits. */
|
1507 |
|
|
reloc_entry->addend += 0x8000;
|
1508 |
|
|
return bfd_reloc_continue;
|
1509 |
|
|
}
|
1510 |
|
|
|
1511 |
|
|
static bfd_reloc_status_type
|
1512 |
|
|
ppc64_elf_toc_reloc (abfd, reloc_entry, symbol, data,
|
1513 |
|
|
input_section, output_bfd, error_message)
|
1514 |
|
|
bfd *abfd;
|
1515 |
|
|
arelent *reloc_entry;
|
1516 |
|
|
asymbol *symbol;
|
1517 |
|
|
PTR data;
|
1518 |
|
|
asection *input_section;
|
1519 |
|
|
bfd *output_bfd;
|
1520 |
|
|
char **error_message;
|
1521 |
|
|
{
|
1522 |
|
|
bfd_vma TOCstart;
|
1523 |
|
|
|
1524 |
|
|
/* If this is a relocatable link (output_bfd test tells us), just
|
1525 |
|
|
call the generic function. Any adjustment will be done at final
|
1526 |
|
|
link time. */
|
1527 |
|
|
if (output_bfd != NULL)
|
1528 |
|
|
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
1529 |
|
|
input_section, output_bfd, error_message);
|
1530 |
|
|
|
1531 |
|
|
TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
|
1532 |
|
|
if (TOCstart == 0)
|
1533 |
|
|
TOCstart = ppc64_elf_toc (input_section->output_section->owner);
|
1534 |
|
|
|
1535 |
|
|
/* Subtract the TOC base address. */
|
1536 |
|
|
reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
|
1537 |
|
|
return bfd_reloc_continue;
|
1538 |
|
|
}
|
1539 |
|
|
|
1540 |
|
|
static bfd_reloc_status_type
|
1541 |
|
|
ppc64_elf_toc_ha_reloc (abfd, reloc_entry, symbol, data,
|
1542 |
|
|
input_section, output_bfd, error_message)
|
1543 |
|
|
bfd *abfd;
|
1544 |
|
|
arelent *reloc_entry;
|
1545 |
|
|
asymbol *symbol;
|
1546 |
|
|
PTR data;
|
1547 |
|
|
asection *input_section;
|
1548 |
|
|
bfd *output_bfd;
|
1549 |
|
|
char **error_message;
|
1550 |
|
|
{
|
1551 |
|
|
bfd_vma TOCstart;
|
1552 |
|
|
|
1553 |
|
|
/* If this is a relocatable link (output_bfd test tells us), just
|
1554 |
|
|
call the generic function. Any adjustment will be done at final
|
1555 |
|
|
link time. */
|
1556 |
|
|
if (output_bfd != NULL)
|
1557 |
|
|
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
1558 |
|
|
input_section, output_bfd, error_message);
|
1559 |
|
|
|
1560 |
|
|
TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
|
1561 |
|
|
if (TOCstart == 0)
|
1562 |
|
|
TOCstart = ppc64_elf_toc (input_section->output_section->owner);
|
1563 |
|
|
|
1564 |
|
|
/* Subtract the TOC base address. */
|
1565 |
|
|
reloc_entry->addend -= TOCstart + TOC_BASE_OFF;
|
1566 |
|
|
|
1567 |
|
|
/* Adjust the addend for sign extension of the low 16 bits. */
|
1568 |
|
|
reloc_entry->addend += 0x8000;
|
1569 |
|
|
return bfd_reloc_continue;
|
1570 |
|
|
}
|
1571 |
|
|
|
1572 |
|
|
static bfd_reloc_status_type
|
1573 |
|
|
ppc64_elf_toc64_reloc (abfd, reloc_entry, symbol, data,
|
1574 |
|
|
input_section, output_bfd, error_message)
|
1575 |
|
|
bfd *abfd;
|
1576 |
|
|
arelent *reloc_entry;
|
1577 |
|
|
asymbol *symbol;
|
1578 |
|
|
PTR data;
|
1579 |
|
|
asection *input_section;
|
1580 |
|
|
bfd *output_bfd;
|
1581 |
|
|
char **error_message;
|
1582 |
|
|
{
|
1583 |
|
|
bfd_vma TOCstart;
|
1584 |
|
|
bfd_size_type octets;
|
1585 |
|
|
|
1586 |
|
|
/* If this is a relocatable link (output_bfd test tells us), just
|
1587 |
|
|
call the generic function. Any adjustment will be done at final
|
1588 |
|
|
link time. */
|
1589 |
|
|
if (output_bfd != NULL)
|
1590 |
|
|
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
1591 |
|
|
input_section, output_bfd, error_message);
|
1592 |
|
|
|
1593 |
|
|
TOCstart = _bfd_get_gp_value (input_section->output_section->owner);
|
1594 |
|
|
if (TOCstart == 0)
|
1595 |
|
|
TOCstart = ppc64_elf_toc (input_section->output_section->owner);
|
1596 |
|
|
|
1597 |
|
|
octets = reloc_entry->address * bfd_octets_per_byte (abfd);
|
1598 |
|
|
bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets);
|
1599 |
|
|
return bfd_reloc_ok;
|
1600 |
|
|
}
|
1601 |
|
|
|
1602 |
|
|
static bfd_reloc_status_type
|
1603 |
|
|
ppc64_elf_unhandled_reloc (abfd, reloc_entry, symbol, data,
|
1604 |
|
|
input_section, output_bfd, error_message)
|
1605 |
|
|
bfd *abfd;
|
1606 |
|
|
arelent *reloc_entry;
|
1607 |
|
|
asymbol *symbol;
|
1608 |
|
|
PTR data;
|
1609 |
|
|
asection *input_section;
|
1610 |
|
|
bfd *output_bfd;
|
1611 |
|
|
char **error_message;
|
1612 |
|
|
{
|
1613 |
|
|
/* If this is a relocatable link (output_bfd test tells us), just
|
1614 |
|
|
call the generic function. Any adjustment will be done at final
|
1615 |
|
|
link time. */
|
1616 |
|
|
if (output_bfd != NULL)
|
1617 |
|
|
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
1618 |
|
|
input_section, output_bfd, error_message);
|
1619 |
|
|
|
1620 |
|
|
if (error_message != NULL)
|
1621 |
|
|
{
|
1622 |
|
|
static char buf[60];
|
1623 |
|
|
sprintf (buf, "generic linker can't handle %s",
|
1624 |
|
|
reloc_entry->howto->name);
|
1625 |
|
|
*error_message = buf;
|
1626 |
|
|
}
|
1627 |
|
|
return bfd_reloc_dangerous;
|
1628 |
|
|
}
|
1629 |
|
|
|
1630 |
|
|
/* Fix bad default arch selected for a 64 bit input bfd when the
|
1631 |
|
|
default is 32 bit. */
|
1632 |
|
|
|
1633 |
|
|
static boolean
|
1634 |
|
|
ppc64_elf_object_p (abfd)
|
1635 |
|
|
bfd *abfd;
|
1636 |
|
|
{
|
1637 |
|
|
if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32)
|
1638 |
|
|
{
|
1639 |
|
|
Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
|
1640 |
|
|
|
1641 |
|
|
if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64)
|
1642 |
|
|
{
|
1643 |
|
|
/* Relies on arch after 32 bit default being 64 bit default. */
|
1644 |
|
|
abfd->arch_info = abfd->arch_info->next;
|
1645 |
|
|
BFD_ASSERT (abfd->arch_info->bits_per_word == 64);
|
1646 |
|
|
}
|
1647 |
|
|
}
|
1648 |
|
|
return true;
|
1649 |
|
|
}
|
1650 |
|
|
|
1651 |
|
|
/* Merge backend specific data from an object file to the output
|
1652 |
|
|
object file when linking. */
|
1653 |
|
|
|
1654 |
|
|
static boolean
|
1655 |
|
|
ppc64_elf_merge_private_bfd_data (ibfd, obfd)
|
1656 |
|
|
bfd *ibfd;
|
1657 |
|
|
bfd *obfd;
|
1658 |
|
|
{
|
1659 |
|
|
/* Check if we have the same endianess. */
|
1660 |
|
|
if (ibfd->xvec->byteorder != obfd->xvec->byteorder
|
1661 |
|
|
&& obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
|
1662 |
|
|
{
|
1663 |
|
|
const char *msg;
|
1664 |
|
|
|
1665 |
|
|
if (bfd_big_endian (ibfd))
|
1666 |
|
|
msg = _("%s: compiled for a big endian system and target is little endian");
|
1667 |
|
|
else
|
1668 |
|
|
msg = _("%s: compiled for a little endian system and target is big endian");
|
1669 |
|
|
|
1670 |
|
|
(*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
|
1671 |
|
|
|
1672 |
|
|
bfd_set_error (bfd_error_wrong_format);
|
1673 |
|
|
return false;
|
1674 |
|
|
}
|
1675 |
|
|
|
1676 |
|
|
return true;
|
1677 |
|
|
}
|
1678 |
|
|
|
1679 |
|
|
/* The following functions are specific to the ELF linker, while
|
1680 |
|
|
functions above are used generally. Those named ppc64_elf_* are
|
1681 |
|
|
called by the main ELF linker code. They appear in this file more
|
1682 |
|
|
or less in the order in which they are called. eg.
|
1683 |
|
|
ppc64_elf_check_relocs is called early in the link process,
|
1684 |
|
|
ppc64_elf_finish_dynamic_sections is one of the last functions
|
1685 |
|
|
called.
|
1686 |
|
|
|
1687 |
|
|
PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that
|
1688 |
|
|
functions have both a function code symbol and a function descriptor
|
1689 |
|
|
symbol. A call to foo in a relocatable object file looks like:
|
1690 |
|
|
|
1691 |
|
|
. .text
|
1692 |
|
|
. x:
|
1693 |
|
|
. bl .foo
|
1694 |
|
|
. nop
|
1695 |
|
|
|
1696 |
|
|
The function definition in another object file might be:
|
1697 |
|
|
|
1698 |
|
|
. .section .opd
|
1699 |
|
|
. foo: .quad .foo
|
1700 |
|
|
. .quad .TOC.@tocbase
|
1701 |
|
|
. .quad 0
|
1702 |
|
|
.
|
1703 |
|
|
. .text
|
1704 |
|
|
. .foo: blr
|
1705 |
|
|
|
1706 |
|
|
When the linker resolves the call during a static link, the branch
|
1707 |
|
|
unsurprisingly just goes to .foo and the .opd information is unused.
|
1708 |
|
|
If the function definition is in a shared library, things are a little
|
1709 |
|
|
different: The call goes via a plt call stub, the opd information gets
|
1710 |
|
|
copied to the plt, and the linker patches the nop.
|
1711 |
|
|
|
1712 |
|
|
. x:
|
1713 |
|
|
. bl .foo_stub
|
1714 |
|
|
. ld 2,40(1)
|
1715 |
|
|
.
|
1716 |
|
|
.
|
1717 |
|
|
. .foo_stub:
|
1718 |
|
|
. addis 12,2,Lfoo@toc@ha # in practice, the call stub
|
1719 |
|
|
. addi 12,12,Lfoo@toc@l # is slightly optimised, but
|
1720 |
|
|
. std 2,40(1) # this is the general idea
|
1721 |
|
|
. ld 11,0(12)
|
1722 |
|
|
. ld 2,8(12)
|
1723 |
|
|
. mtctr 11
|
1724 |
|
|
. ld 11,16(12)
|
1725 |
|
|
. bctr
|
1726 |
|
|
.
|
1727 |
|
|
. .section .plt
|
1728 |
|
|
. Lfoo: reloc (R_PPC64_JMP_SLOT, foo)
|
1729 |
|
|
|
1730 |
|
|
The "reloc ()" notation is supposed to indicate that the linker emits
|
1731 |
|
|
an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd
|
1732 |
|
|
copying.
|
1733 |
|
|
|
1734 |
|
|
What are the difficulties here? Well, firstly, the relocations
|
1735 |
|
|
examined by the linker in check_relocs are against the function code
|
1736 |
|
|
sym .foo, while the dynamic relocation in the plt is emitted against
|
1737 |
|
|
the function descriptor symbol, foo. Somewhere along the line, we need
|
1738 |
|
|
to carefully copy dynamic link information from one symbol to the other.
|
1739 |
|
|
Secondly, the generic part of the elf linker will make .foo a dynamic
|
1740 |
|
|
symbol as is normal for most other backends. We need foo dynamic
|
1741 |
|
|
instead, at least for an application final link. However, when
|
1742 |
|
|
creating a shared library containing foo, we need to have both symbols
|
1743 |
|
|
dynamic so that references to .foo are satisfied during the early
|
1744 |
|
|
stages of linking. Otherwise the linker might decide to pull in a
|
1745 |
|
|
definition from some other object, eg. a static library. */
|
1746 |
|
|
|
1747 |
|
|
/* The linker needs to keep track of the number of relocs that it
|
1748 |
|
|
decides to copy as dynamic relocs in check_relocs for each symbol.
|
1749 |
|
|
This is so that it can later discard them if they are found to be
|
1750 |
|
|
unnecessary. We store the information in a field extending the
|
1751 |
|
|
regular ELF linker hash table. */
|
1752 |
|
|
|
1753 |
|
|
struct ppc_dyn_relocs
|
1754 |
|
|
{
|
1755 |
|
|
struct ppc_dyn_relocs *next;
|
1756 |
|
|
|
1757 |
|
|
/* The input section of the reloc. */
|
1758 |
|
|
asection *sec;
|
1759 |
|
|
|
1760 |
|
|
/* Total number of relocs copied for the input section. */
|
1761 |
|
|
bfd_size_type count;
|
1762 |
|
|
|
1763 |
|
|
/* Number of pc-relative relocs copied for the input section. */
|
1764 |
|
|
bfd_size_type pc_count;
|
1765 |
|
|
};
|
1766 |
|
|
|
1767 |
|
|
/* Of those relocs that might be copied as dynamic relocs, this macro
|
1768 |
|
|
selects between relative and absolute types. */
|
1769 |
|
|
|
1770 |
|
|
#define IS_ABSOLUTE_RELOC(RTYPE) \
|
1771 |
|
|
((RTYPE) != R_PPC64_REL32 \
|
1772 |
|
|
&& (RTYPE) != R_PPC64_REL64 \
|
1773 |
|
|
&& (RTYPE) != R_PPC64_ADDR30)
|
1774 |
|
|
|
1775 |
|
|
/* Section name for stubs is the associated section name plus this
|
1776 |
|
|
string. */
|
1777 |
|
|
#define STUB_SUFFIX ".stub"
|
1778 |
|
|
|
1779 |
|
|
/* Linker stubs.
|
1780 |
|
|
ppc_stub_long_branch:
|
1781 |
|
|
Used when a 14 bit branch (or even a 24 bit branch) can't reach its
|
1782 |
|
|
destination, but a 24 bit branch in a stub section will reach.
|
1783 |
|
|
. b dest
|
1784 |
|
|
|
1785 |
|
|
ppc_stub_plt_branch:
|
1786 |
|
|
Similar to the above, but a 24 bit branch in the stub section won't
|
1787 |
|
|
reach its destination.
|
1788 |
|
|
. addis %r12,%r2,xxx@ha
|
1789 |
|
|
. ld %r11,xxx@l(%r12)
|
1790 |
|
|
. mtctr %r11
|
1791 |
|
|
. bctr
|
1792 |
|
|
|
1793 |
|
|
ppc_stub_plt_call:
|
1794 |
|
|
Used to call a function in a shared library.
|
1795 |
|
|
. addis %r12,%r2,xxx@ha
|
1796 |
|
|
. std %r2,40(%r1)
|
1797 |
|
|
. ld %r11,xxx+0@l(%r12)
|
1798 |
|
|
. ld %r2,xxx+8@l(%r12)
|
1799 |
|
|
. mtctr %r11
|
1800 |
|
|
. ld %r11,xxx+16@l(%r12)
|
1801 |
|
|
. bctr
|
1802 |
|
|
*/
|
1803 |
|
|
|
1804 |
|
|
enum ppc_stub_type {
|
1805 |
|
|
ppc_stub_none,
|
1806 |
|
|
ppc_stub_long_branch,
|
1807 |
|
|
ppc_stub_plt_branch,
|
1808 |
|
|
ppc_stub_plt_call
|
1809 |
|
|
};
|
1810 |
|
|
|
1811 |
|
|
struct ppc_stub_hash_entry {
|
1812 |
|
|
|
1813 |
|
|
/* Base hash table entry structure. */
|
1814 |
|
|
struct bfd_hash_entry root;
|
1815 |
|
|
|
1816 |
|
|
/* The stub section. */
|
1817 |
|
|
asection *stub_sec;
|
1818 |
|
|
|
1819 |
|
|
/* Offset within stub_sec of the beginning of this stub. */
|
1820 |
|
|
bfd_vma stub_offset;
|
1821 |
|
|
|
1822 |
|
|
/* Given the symbol's value and its section we can determine its final
|
1823 |
|
|
value when building the stubs (so the stub knows where to jump. */
|
1824 |
|
|
bfd_vma target_value;
|
1825 |
|
|
asection *target_section;
|
1826 |
|
|
|
1827 |
|
|
enum ppc_stub_type stub_type;
|
1828 |
|
|
|
1829 |
|
|
/* The symbol table entry, if any, that this was derived from. */
|
1830 |
|
|
struct ppc_link_hash_entry *h;
|
1831 |
|
|
|
1832 |
|
|
/* Where this stub is being called from, or, in the case of combined
|
1833 |
|
|
stub sections, the first input section in the group. */
|
1834 |
|
|
asection *id_sec;
|
1835 |
|
|
};
|
1836 |
|
|
|
1837 |
|
|
struct ppc_branch_hash_entry {
|
1838 |
|
|
|
1839 |
|
|
/* Base hash table entry structure. */
|
1840 |
|
|
struct bfd_hash_entry root;
|
1841 |
|
|
|
1842 |
|
|
/* Offset within .branch_lt. */
|
1843 |
|
|
unsigned int offset;
|
1844 |
|
|
|
1845 |
|
|
/* Generation marker. */
|
1846 |
|
|
unsigned int iter;
|
1847 |
|
|
};
|
1848 |
|
|
|
1849 |
|
|
struct ppc_link_hash_entry
|
1850 |
|
|
{
|
1851 |
|
|
struct elf_link_hash_entry elf;
|
1852 |
|
|
|
1853 |
|
|
/* A pointer to the most recently used stub hash entry against this
|
1854 |
|
|
symbol. */
|
1855 |
|
|
struct ppc_stub_hash_entry *stub_cache;
|
1856 |
|
|
|
1857 |
|
|
/* Track dynamic relocs copied for this symbol. */
|
1858 |
|
|
struct ppc_dyn_relocs *dyn_relocs;
|
1859 |
|
|
|
1860 |
|
|
/* Link between function code and descriptor symbols. */
|
1861 |
|
|
struct elf_link_hash_entry *oh;
|
1862 |
|
|
|
1863 |
|
|
/* Flag function code and descriptor symbols. */
|
1864 |
|
|
unsigned int is_func:1;
|
1865 |
|
|
unsigned int is_func_descriptor:1;
|
1866 |
|
|
unsigned int is_entry:1;
|
1867 |
|
|
};
|
1868 |
|
|
|
1869 |
|
|
/* ppc64 ELF linker hash table. */
|
1870 |
|
|
|
1871 |
|
|
struct ppc_link_hash_table
|
1872 |
|
|
{
|
1873 |
|
|
struct elf_link_hash_table elf;
|
1874 |
|
|
|
1875 |
|
|
/* The stub hash table. */
|
1876 |
|
|
struct bfd_hash_table stub_hash_table;
|
1877 |
|
|
|
1878 |
|
|
/* Another hash table for plt_branch stubs. */
|
1879 |
|
|
struct bfd_hash_table branch_hash_table;
|
1880 |
|
|
|
1881 |
|
|
/* Linker stub bfd. */
|
1882 |
|
|
bfd *stub_bfd;
|
1883 |
|
|
|
1884 |
|
|
/* Linker call-backs. */
|
1885 |
|
|
asection * (*add_stub_section) PARAMS ((const char *, asection *));
|
1886 |
|
|
void (*layout_sections_again) PARAMS ((void));
|
1887 |
|
|
|
1888 |
|
|
/* Array to keep track of which stub sections have been created, and
|
1889 |
|
|
information on stub grouping. */
|
1890 |
|
|
struct map_stub {
|
1891 |
|
|
/* This is the section to which stubs in the group will be attached. */
|
1892 |
|
|
asection *link_sec;
|
1893 |
|
|
/* The stub section. */
|
1894 |
|
|
asection *stub_sec;
|
1895 |
|
|
} *stub_group;
|
1896 |
|
|
|
1897 |
|
|
/* Assorted information used by ppc64_elf_size_stubs. */
|
1898 |
|
|
int top_index;
|
1899 |
|
|
asection **input_list;
|
1900 |
|
|
|
1901 |
|
|
/* Short-cuts to get to dynamic linker sections. */
|
1902 |
|
|
asection *sgot;
|
1903 |
|
|
asection *srelgot;
|
1904 |
|
|
asection *splt;
|
1905 |
|
|
asection *srelplt;
|
1906 |
|
|
asection *sdynbss;
|
1907 |
|
|
asection *srelbss;
|
1908 |
|
|
asection *sglink;
|
1909 |
|
|
asection *sfpr;
|
1910 |
|
|
asection *sbrlt;
|
1911 |
|
|
asection *srelbrlt;
|
1912 |
|
|
|
1913 |
|
|
/* Set on error. */
|
1914 |
|
|
unsigned int stub_error;
|
1915 |
|
|
|
1916 |
|
|
/* Flag set when small branches are detected. Used to
|
1917 |
|
|
select suitable defaults for the stub group size. */
|
1918 |
|
|
unsigned int has_14bit_branch;
|
1919 |
|
|
|
1920 |
|
|
/* Set if we detect a reference undefined weak symbol. */
|
1921 |
|
|
unsigned int have_undefweak;
|
1922 |
|
|
|
1923 |
|
|
/* Incremented every time we size stubs. */
|
1924 |
|
|
unsigned int stub_iteration;
|
1925 |
|
|
|
1926 |
|
|
/* Small local sym to section mapping cache. */
|
1927 |
|
|
struct sym_sec_cache sym_sec;
|
1928 |
|
|
};
|
1929 |
|
|
|
1930 |
|
|
static struct bfd_hash_entry *stub_hash_newfunc
|
1931 |
|
|
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
|
1932 |
|
|
static struct bfd_hash_entry *branch_hash_newfunc
|
1933 |
|
|
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
|
1934 |
|
|
static struct bfd_hash_entry *link_hash_newfunc
|
1935 |
|
|
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
|
1936 |
|
|
static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create
|
1937 |
|
|
PARAMS ((bfd *));
|
1938 |
|
|
static void ppc64_elf_link_hash_table_free
|
1939 |
|
|
PARAMS ((struct bfd_link_hash_table *));
|
1940 |
|
|
static char *ppc_stub_name
|
1941 |
|
|
PARAMS ((const asection *, const asection *,
|
1942 |
|
|
const struct ppc_link_hash_entry *, const Elf_Internal_Rela *));
|
1943 |
|
|
static struct ppc_stub_hash_entry *ppc_get_stub_entry
|
1944 |
|
|
PARAMS ((const asection *, const asection *, struct elf_link_hash_entry *,
|
1945 |
|
|
const Elf_Internal_Rela *, struct ppc_link_hash_table *));
|
1946 |
|
|
static struct ppc_stub_hash_entry *ppc_add_stub
|
1947 |
|
|
PARAMS ((const char *, asection *, struct ppc_link_hash_table *));
|
1948 |
|
|
static boolean create_linkage_sections
|
1949 |
|
|
PARAMS ((bfd *, struct bfd_link_info *));
|
1950 |
|
|
static boolean create_got_section
|
1951 |
|
|
PARAMS ((bfd *, struct bfd_link_info *));
|
1952 |
|
|
static boolean ppc64_elf_create_dynamic_sections
|
1953 |
|
|
PARAMS ((bfd *, struct bfd_link_info *));
|
1954 |
|
|
static void ppc64_elf_copy_indirect_symbol
|
1955 |
|
|
PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
|
1956 |
|
|
struct elf_link_hash_entry *));
|
1957 |
|
|
static boolean ppc64_elf_check_relocs
|
1958 |
|
|
PARAMS ((bfd *, struct bfd_link_info *, asection *,
|
1959 |
|
|
const Elf_Internal_Rela *));
|
1960 |
|
|
static asection * ppc64_elf_gc_mark_hook
|
1961 |
|
|
PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
|
1962 |
|
|
struct elf_link_hash_entry *, Elf_Internal_Sym *));
|
1963 |
|
|
static boolean ppc64_elf_gc_sweep_hook
|
1964 |
|
|
PARAMS ((bfd *, struct bfd_link_info *, asection *,
|
1965 |
|
|
const Elf_Internal_Rela *));
|
1966 |
|
|
static boolean func_desc_adjust
|
1967 |
|
|
PARAMS ((struct elf_link_hash_entry *, PTR));
|
1968 |
|
|
static boolean ppc64_elf_func_desc_adjust
|
1969 |
|
|
PARAMS ((bfd *, struct bfd_link_info *));
|
1970 |
|
|
static boolean ppc64_elf_adjust_dynamic_symbol
|
1971 |
|
|
PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
|
1972 |
|
|
static void ppc64_elf_hide_symbol
|
1973 |
|
|
PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean));
|
1974 |
|
|
static boolean edit_opd
|
1975 |
|
|
PARAMS ((bfd *, struct bfd_link_info *));
|
1976 |
|
|
static boolean allocate_dynrelocs
|
1977 |
|
|
PARAMS ((struct elf_link_hash_entry *, PTR));
|
1978 |
|
|
static boolean readonly_dynrelocs
|
1979 |
|
|
PARAMS ((struct elf_link_hash_entry *, PTR));
|
1980 |
|
|
static enum elf_reloc_type_class ppc64_elf_reloc_type_class
|
1981 |
|
|
PARAMS ((const Elf_Internal_Rela *));
|
1982 |
|
|
static boolean ppc64_elf_size_dynamic_sections
|
1983 |
|
|
PARAMS ((bfd *, struct bfd_link_info *));
|
1984 |
|
|
static INLINE enum ppc_stub_type ppc_type_of_stub
|
1985 |
|
|
PARAMS ((asection *, const Elf_Internal_Rela *,
|
1986 |
|
|
struct ppc_link_hash_entry **, bfd_vma));
|
1987 |
|
|
static bfd_byte *build_plt_stub
|
1988 |
|
|
PARAMS ((bfd *, bfd_byte *, int, int));
|
1989 |
|
|
static boolean ppc_build_one_stub
|
1990 |
|
|
PARAMS ((struct bfd_hash_entry *, PTR));
|
1991 |
|
|
static boolean ppc_size_one_stub
|
1992 |
|
|
PARAMS ((struct bfd_hash_entry *, PTR));
|
1993 |
|
|
static void group_sections
|
1994 |
|
|
PARAMS ((struct ppc_link_hash_table *, bfd_size_type, boolean));
|
1995 |
|
|
static boolean ppc64_elf_relocate_section
|
1996 |
|
|
PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *,
|
1997 |
|
|
Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
|
1998 |
|
|
asection **));
|
1999 |
|
|
static boolean ppc64_elf_finish_dynamic_symbol
|
2000 |
|
|
PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
|
2001 |
|
|
Elf_Internal_Sym *));
|
2002 |
|
|
static boolean ppc64_elf_finish_dynamic_sections
|
2003 |
|
|
PARAMS ((bfd *, struct bfd_link_info *));
|
2004 |
|
|
|
2005 |
|
|
/* Get the ppc64 ELF linker hash table from a link_info structure. */
|
2006 |
|
|
|
2007 |
|
|
#define ppc_hash_table(p) \
|
2008 |
|
|
((struct ppc_link_hash_table *) ((p)->hash))
|
2009 |
|
|
|
2010 |
|
|
#define ppc_stub_hash_lookup(table, string, create, copy) \
|
2011 |
|
|
((struct ppc_stub_hash_entry *) \
|
2012 |
|
|
bfd_hash_lookup ((table), (string), (create), (copy)))
|
2013 |
|
|
|
2014 |
|
|
#define ppc_branch_hash_lookup(table, string, create, copy) \
|
2015 |
|
|
((struct ppc_branch_hash_entry *) \
|
2016 |
|
|
bfd_hash_lookup ((table), (string), (create), (copy)))
|
2017 |
|
|
|
2018 |
|
|
/* Create an entry in the stub hash table. */
|
2019 |
|
|
|
2020 |
|
|
static struct bfd_hash_entry *
|
2021 |
|
|
stub_hash_newfunc (entry, table, string)
|
2022 |
|
|
struct bfd_hash_entry *entry;
|
2023 |
|
|
struct bfd_hash_table *table;
|
2024 |
|
|
const char *string;
|
2025 |
|
|
{
|
2026 |
|
|
/* Allocate the structure if it has not already been allocated by a
|
2027 |
|
|
subclass. */
|
2028 |
|
|
if (entry == NULL)
|
2029 |
|
|
{
|
2030 |
|
|
entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry));
|
2031 |
|
|
if (entry == NULL)
|
2032 |
|
|
return entry;
|
2033 |
|
|
}
|
2034 |
|
|
|
2035 |
|
|
/* Call the allocation method of the superclass. */
|
2036 |
|
|
entry = bfd_hash_newfunc (entry, table, string);
|
2037 |
|
|
if (entry != NULL)
|
2038 |
|
|
{
|
2039 |
|
|
struct ppc_stub_hash_entry *eh;
|
2040 |
|
|
|
2041 |
|
|
/* Initialize the local fields. */
|
2042 |
|
|
eh = (struct ppc_stub_hash_entry *) entry;
|
2043 |
|
|
eh->stub_sec = NULL;
|
2044 |
|
|
eh->stub_offset = 0;
|
2045 |
|
|
eh->target_value = 0;
|
2046 |
|
|
eh->target_section = NULL;
|
2047 |
|
|
eh->stub_type = ppc_stub_none;
|
2048 |
|
|
eh->h = NULL;
|
2049 |
|
|
eh->id_sec = NULL;
|
2050 |
|
|
}
|
2051 |
|
|
|
2052 |
|
|
return entry;
|
2053 |
|
|
}
|
2054 |
|
|
|
2055 |
|
|
/* Create an entry in the branch hash table. */
|
2056 |
|
|
|
2057 |
|
|
static struct bfd_hash_entry *
|
2058 |
|
|
branch_hash_newfunc (entry, table, string)
|
2059 |
|
|
struct bfd_hash_entry *entry;
|
2060 |
|
|
struct bfd_hash_table *table;
|
2061 |
|
|
const char *string;
|
2062 |
|
|
{
|
2063 |
|
|
/* Allocate the structure if it has not already been allocated by a
|
2064 |
|
|
subclass. */
|
2065 |
|
|
if (entry == NULL)
|
2066 |
|
|
{
|
2067 |
|
|
entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry));
|
2068 |
|
|
if (entry == NULL)
|
2069 |
|
|
return entry;
|
2070 |
|
|
}
|
2071 |
|
|
|
2072 |
|
|
/* Call the allocation method of the superclass. */
|
2073 |
|
|
entry = bfd_hash_newfunc (entry, table, string);
|
2074 |
|
|
if (entry != NULL)
|
2075 |
|
|
{
|
2076 |
|
|
struct ppc_branch_hash_entry *eh;
|
2077 |
|
|
|
2078 |
|
|
/* Initialize the local fields. */
|
2079 |
|
|
eh = (struct ppc_branch_hash_entry *) entry;
|
2080 |
|
|
eh->offset = 0;
|
2081 |
|
|
eh->iter = 0;
|
2082 |
|
|
}
|
2083 |
|
|
|
2084 |
|
|
return entry;
|
2085 |
|
|
}
|
2086 |
|
|
|
2087 |
|
|
/* Create an entry in a ppc64 ELF linker hash table. */
|
2088 |
|
|
|
2089 |
|
|
static struct bfd_hash_entry *
|
2090 |
|
|
link_hash_newfunc (entry, table, string)
|
2091 |
|
|
struct bfd_hash_entry *entry;
|
2092 |
|
|
struct bfd_hash_table *table;
|
2093 |
|
|
const char *string;
|
2094 |
|
|
{
|
2095 |
|
|
/* Allocate the structure if it has not already been allocated by a
|
2096 |
|
|
subclass. */
|
2097 |
|
|
if (entry == NULL)
|
2098 |
|
|
{
|
2099 |
|
|
entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
|
2100 |
|
|
if (entry == NULL)
|
2101 |
|
|
return entry;
|
2102 |
|
|
}
|
2103 |
|
|
|
2104 |
|
|
/* Call the allocation method of the superclass. */
|
2105 |
|
|
entry = _bfd_elf_link_hash_newfunc (entry, table, string);
|
2106 |
|
|
if (entry != NULL)
|
2107 |
|
|
{
|
2108 |
|
|
struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
|
2109 |
|
|
|
2110 |
|
|
eh->stub_cache = NULL;
|
2111 |
|
|
eh->dyn_relocs = NULL;
|
2112 |
|
|
eh->oh = NULL;
|
2113 |
|
|
eh->is_func = 0;
|
2114 |
|
|
eh->is_func_descriptor = 0;
|
2115 |
|
|
eh->is_entry = 0;
|
2116 |
|
|
}
|
2117 |
|
|
|
2118 |
|
|
return entry;
|
2119 |
|
|
}
|
2120 |
|
|
|
2121 |
|
|
/* Create a ppc64 ELF linker hash table. */
|
2122 |
|
|
|
2123 |
|
|
static struct bfd_link_hash_table *
|
2124 |
|
|
ppc64_elf_link_hash_table_create (abfd)
|
2125 |
|
|
bfd *abfd;
|
2126 |
|
|
{
|
2127 |
|
|
struct ppc_link_hash_table *htab;
|
2128 |
|
|
bfd_size_type amt = sizeof (struct ppc_link_hash_table);
|
2129 |
|
|
|
2130 |
|
|
htab = (struct ppc_link_hash_table *) bfd_malloc (amt);
|
2131 |
|
|
if (htab == NULL)
|
2132 |
|
|
return NULL;
|
2133 |
|
|
|
2134 |
|
|
if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
|
2135 |
|
|
{
|
2136 |
|
|
free (htab);
|
2137 |
|
|
return NULL;
|
2138 |
|
|
}
|
2139 |
|
|
|
2140 |
|
|
/* Init the stub hash table too. */
|
2141 |
|
|
if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc))
|
2142 |
|
|
return NULL;
|
2143 |
|
|
|
2144 |
|
|
/* And the branch hash table. */
|
2145 |
|
|
if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc))
|
2146 |
|
|
return NULL;
|
2147 |
|
|
|
2148 |
|
|
htab->stub_bfd = NULL;
|
2149 |
|
|
htab->add_stub_section = NULL;
|
2150 |
|
|
htab->layout_sections_again = NULL;
|
2151 |
|
|
htab->stub_group = NULL;
|
2152 |
|
|
htab->sgot = NULL;
|
2153 |
|
|
htab->srelgot = NULL;
|
2154 |
|
|
htab->splt = NULL;
|
2155 |
|
|
htab->srelplt = NULL;
|
2156 |
|
|
htab->sdynbss = NULL;
|
2157 |
|
|
htab->srelbss = NULL;
|
2158 |
|
|
htab->sglink = NULL;
|
2159 |
|
|
htab->sfpr = NULL;
|
2160 |
|
|
htab->sbrlt = NULL;
|
2161 |
|
|
htab->srelbrlt = NULL;
|
2162 |
|
|
htab->stub_error = 0;
|
2163 |
|
|
htab->has_14bit_branch = 0;
|
2164 |
|
|
htab->have_undefweak = 0;
|
2165 |
|
|
htab->stub_iteration = 0;
|
2166 |
|
|
htab->sym_sec.abfd = NULL;
|
2167 |
|
|
|
2168 |
|
|
return &htab->elf.root;
|
2169 |
|
|
}
|
2170 |
|
|
|
2171 |
|
|
/* Free the derived linker hash table. */
|
2172 |
|
|
|
2173 |
|
|
static void
|
2174 |
|
|
ppc64_elf_link_hash_table_free (hash)
|
2175 |
|
|
struct bfd_link_hash_table *hash;
|
2176 |
|
|
{
|
2177 |
|
|
struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash;
|
2178 |
|
|
|
2179 |
|
|
bfd_hash_table_free (&ret->stub_hash_table);
|
2180 |
|
|
bfd_hash_table_free (&ret->branch_hash_table);
|
2181 |
|
|
_bfd_generic_link_hash_table_free (hash);
|
2182 |
|
|
}
|
2183 |
|
|
|
2184 |
|
|
/* Build a name for an entry in the stub hash table. */
|
2185 |
|
|
|
2186 |
|
|
static char *
|
2187 |
|
|
ppc_stub_name (input_section, sym_sec, h, rel)
|
2188 |
|
|
const asection *input_section;
|
2189 |
|
|
const asection *sym_sec;
|
2190 |
|
|
const struct ppc_link_hash_entry *h;
|
2191 |
|
|
const Elf_Internal_Rela *rel;
|
2192 |
|
|
{
|
2193 |
|
|
char *stub_name;
|
2194 |
|
|
bfd_size_type len;
|
2195 |
|
|
|
2196 |
|
|
/* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31
|
2197 |
|
|
offsets from a sym as a branch target? In fact, we could
|
2198 |
|
|
probably assume the addend is always zero. */
|
2199 |
|
|
BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend);
|
2200 |
|
|
|
2201 |
|
|
if (h)
|
2202 |
|
|
{
|
2203 |
|
|
len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1;
|
2204 |
|
|
stub_name = bfd_malloc (len);
|
2205 |
|
|
if (stub_name != NULL)
|
2206 |
|
|
{
|
2207 |
|
|
sprintf (stub_name, "%08x_%s+%x",
|
2208 |
|
|
input_section->id & 0xffffffff,
|
2209 |
|
|
h->elf.root.root.string,
|
2210 |
|
|
(int) rel->r_addend & 0xffffffff);
|
2211 |
|
|
}
|
2212 |
|
|
}
|
2213 |
|
|
else
|
2214 |
|
|
{
|
2215 |
|
|
len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
|
2216 |
|
|
stub_name = bfd_malloc (len);
|
2217 |
|
|
if (stub_name != NULL)
|
2218 |
|
|
{
|
2219 |
|
|
sprintf (stub_name, "%08x_%x:%x+%x",
|
2220 |
|
|
input_section->id & 0xffffffff,
|
2221 |
|
|
sym_sec->id & 0xffffffff,
|
2222 |
|
|
(int) ELF64_R_SYM (rel->r_info) & 0xffffffff,
|
2223 |
|
|
(int) rel->r_addend & 0xffffffff);
|
2224 |
|
|
}
|
2225 |
|
|
}
|
2226 |
|
|
return stub_name;
|
2227 |
|
|
}
|
2228 |
|
|
|
2229 |
|
|
/* Look up an entry in the stub hash. Stub entries are cached because
|
2230 |
|
|
creating the stub name takes a bit of time. */
|
2231 |
|
|
|
2232 |
|
|
static struct ppc_stub_hash_entry *
|
2233 |
|
|
ppc_get_stub_entry (input_section, sym_sec, hash, rel, htab)
|
2234 |
|
|
const asection *input_section;
|
2235 |
|
|
const asection *sym_sec;
|
2236 |
|
|
struct elf_link_hash_entry *hash;
|
2237 |
|
|
const Elf_Internal_Rela *rel;
|
2238 |
|
|
struct ppc_link_hash_table *htab;
|
2239 |
|
|
{
|
2240 |
|
|
struct ppc_stub_hash_entry *stub_entry;
|
2241 |
|
|
struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash;
|
2242 |
|
|
const asection *id_sec;
|
2243 |
|
|
|
2244 |
|
|
/* If this input section is part of a group of sections sharing one
|
2245 |
|
|
stub section, then use the id of the first section in the group.
|
2246 |
|
|
Stub names need to include a section id, as there may well be
|
2247 |
|
|
more than one stub used to reach say, printf, and we need to
|
2248 |
|
|
distinguish between them. */
|
2249 |
|
|
id_sec = htab->stub_group[input_section->id].link_sec;
|
2250 |
|
|
|
2251 |
|
|
if (h != NULL && h->stub_cache != NULL
|
2252 |
|
|
&& h->stub_cache->h == h
|
2253 |
|
|
&& h->stub_cache->id_sec == id_sec)
|
2254 |
|
|
{
|
2255 |
|
|
stub_entry = h->stub_cache;
|
2256 |
|
|
}
|
2257 |
|
|
else
|
2258 |
|
|
{
|
2259 |
|
|
char *stub_name;
|
2260 |
|
|
|
2261 |
|
|
stub_name = ppc_stub_name (id_sec, sym_sec, h, rel);
|
2262 |
|
|
if (stub_name == NULL)
|
2263 |
|
|
return NULL;
|
2264 |
|
|
|
2265 |
|
|
stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
|
2266 |
|
|
stub_name, false, false);
|
2267 |
|
|
if (h != NULL)
|
2268 |
|
|
h->stub_cache = stub_entry;
|
2269 |
|
|
|
2270 |
|
|
free (stub_name);
|
2271 |
|
|
}
|
2272 |
|
|
|
2273 |
|
|
return stub_entry;
|
2274 |
|
|
}
|
2275 |
|
|
|
2276 |
|
|
/* Add a new stub entry to the stub hash. Not all fields of the new
|
2277 |
|
|
stub entry are initialised. */
|
2278 |
|
|
|
2279 |
|
|
static struct ppc_stub_hash_entry *
|
2280 |
|
|
ppc_add_stub (stub_name, section, htab)
|
2281 |
|
|
const char *stub_name;
|
2282 |
|
|
asection *section;
|
2283 |
|
|
struct ppc_link_hash_table *htab;
|
2284 |
|
|
{
|
2285 |
|
|
asection *link_sec;
|
2286 |
|
|
asection *stub_sec;
|
2287 |
|
|
struct ppc_stub_hash_entry *stub_entry;
|
2288 |
|
|
|
2289 |
|
|
link_sec = htab->stub_group[section->id].link_sec;
|
2290 |
|
|
stub_sec = htab->stub_group[section->id].stub_sec;
|
2291 |
|
|
if (stub_sec == NULL)
|
2292 |
|
|
{
|
2293 |
|
|
stub_sec = htab->stub_group[link_sec->id].stub_sec;
|
2294 |
|
|
if (stub_sec == NULL)
|
2295 |
|
|
{
|
2296 |
|
|
size_t namelen;
|
2297 |
|
|
bfd_size_type len;
|
2298 |
|
|
char *s_name;
|
2299 |
|
|
|
2300 |
|
|
namelen = strlen (link_sec->name);
|
2301 |
|
|
len = namelen + sizeof (STUB_SUFFIX);
|
2302 |
|
|
s_name = bfd_alloc (htab->stub_bfd, len);
|
2303 |
|
|
if (s_name == NULL)
|
2304 |
|
|
return NULL;
|
2305 |
|
|
|
2306 |
|
|
memcpy (s_name, link_sec->name, namelen);
|
2307 |
|
|
memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
|
2308 |
|
|
stub_sec = (*htab->add_stub_section) (s_name, link_sec);
|
2309 |
|
|
if (stub_sec == NULL)
|
2310 |
|
|
return NULL;
|
2311 |
|
|
htab->stub_group[link_sec->id].stub_sec = stub_sec;
|
2312 |
|
|
}
|
2313 |
|
|
htab->stub_group[section->id].stub_sec = stub_sec;
|
2314 |
|
|
}
|
2315 |
|
|
|
2316 |
|
|
/* Enter this entry into the linker stub hash table. */
|
2317 |
|
|
stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name,
|
2318 |
|
|
true, false);
|
2319 |
|
|
if (stub_entry == NULL)
|
2320 |
|
|
{
|
2321 |
|
|
(*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
|
2322 |
|
|
bfd_archive_filename (section->owner),
|
2323 |
|
|
stub_name);
|
2324 |
|
|
return NULL;
|
2325 |
|
|
}
|
2326 |
|
|
|
2327 |
|
|
stub_entry->stub_sec = stub_sec;
|
2328 |
|
|
stub_entry->stub_offset = 0;
|
2329 |
|
|
stub_entry->id_sec = link_sec;
|
2330 |
|
|
return stub_entry;
|
2331 |
|
|
}
|
2332 |
|
|
|
2333 |
|
|
/* Create sections for linker generated code. */
|
2334 |
|
|
|
2335 |
|
|
static boolean
|
2336 |
|
|
create_linkage_sections (dynobj, info)
|
2337 |
|
|
bfd *dynobj;
|
2338 |
|
|
struct bfd_link_info *info;
|
2339 |
|
|
{
|
2340 |
|
|
struct ppc_link_hash_table *htab;
|
2341 |
|
|
flagword flags;
|
2342 |
|
|
|
2343 |
|
|
htab = ppc_hash_table (info);
|
2344 |
|
|
|
2345 |
|
|
/* Create .sfpr for code to save and restore fp regs. */
|
2346 |
|
|
flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
|
2347 |
|
|
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
2348 |
|
|
htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr");
|
2349 |
|
|
if (htab->sfpr == NULL
|
2350 |
|
|
|| ! bfd_set_section_flags (dynobj, htab->sfpr, flags)
|
2351 |
|
|
|| ! bfd_set_section_alignment (dynobj, htab->sfpr, 2))
|
2352 |
|
|
return false;
|
2353 |
|
|
|
2354 |
|
|
/* Create .glink for lazy dynamic linking support. */
|
2355 |
|
|
htab->sglink = bfd_make_section_anyway (dynobj, ".glink");
|
2356 |
|
|
if (htab->sglink == NULL
|
2357 |
|
|
|| ! bfd_set_section_flags (dynobj, htab->sglink, flags)
|
2358 |
|
|
|| ! bfd_set_section_alignment (dynobj, htab->sglink, 2))
|
2359 |
|
|
return false;
|
2360 |
|
|
|
2361 |
|
|
/* Create .branch_lt for plt_branch stubs. */
|
2362 |
|
|
flags = (SEC_ALLOC | SEC_LOAD
|
2363 |
|
|
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
2364 |
|
|
htab->sbrlt = bfd_make_section_anyway (dynobj, ".branch_lt");
|
2365 |
|
|
if (htab->sbrlt == NULL
|
2366 |
|
|
|| ! bfd_set_section_flags (dynobj, htab->sbrlt, flags)
|
2367 |
|
|
|| ! bfd_set_section_alignment (dynobj, htab->sbrlt, 3))
|
2368 |
|
|
return false;
|
2369 |
|
|
|
2370 |
|
|
if (info->shared)
|
2371 |
|
|
{
|
2372 |
|
|
flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
|
2373 |
|
|
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
2374 |
|
|
htab->srelbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt");
|
2375 |
|
|
if (!htab->srelbrlt
|
2376 |
|
|
|| ! bfd_set_section_flags (dynobj, htab->srelbrlt, flags)
|
2377 |
|
|
|| ! bfd_set_section_alignment (dynobj, htab->srelbrlt, 3))
|
2378 |
|
|
return false;
|
2379 |
|
|
}
|
2380 |
|
|
return true;
|
2381 |
|
|
}
|
2382 |
|
|
|
2383 |
|
|
/* Create .got and .rela.got sections in DYNOBJ, and set up
|
2384 |
|
|
shortcuts to them in our hash table. */
|
2385 |
|
|
|
2386 |
|
|
static boolean
|
2387 |
|
|
create_got_section (dynobj, info)
|
2388 |
|
|
bfd *dynobj;
|
2389 |
|
|
struct bfd_link_info *info;
|
2390 |
|
|
{
|
2391 |
|
|
struct ppc_link_hash_table *htab;
|
2392 |
|
|
|
2393 |
|
|
if (! _bfd_elf_create_got_section (dynobj, info))
|
2394 |
|
|
return false;
|
2395 |
|
|
|
2396 |
|
|
htab = ppc_hash_table (info);
|
2397 |
|
|
htab->sgot = bfd_get_section_by_name (dynobj, ".got");
|
2398 |
|
|
if (!htab->sgot)
|
2399 |
|
|
abort ();
|
2400 |
|
|
|
2401 |
|
|
htab->srelgot = bfd_make_section (dynobj, ".rela.got");
|
2402 |
|
|
if (!htab->srelgot
|
2403 |
|
|
|| ! bfd_set_section_flags (dynobj, htab->srelgot,
|
2404 |
|
|
(SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
|
2405 |
|
|
| SEC_IN_MEMORY | SEC_LINKER_CREATED
|
2406 |
|
|
| SEC_READONLY))
|
2407 |
|
|
|| ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
|
2408 |
|
|
return false;
|
2409 |
|
|
return true;
|
2410 |
|
|
}
|
2411 |
|
|
|
2412 |
|
|
/* Create the dynamic sections, and set up shortcuts. */
|
2413 |
|
|
|
2414 |
|
|
static boolean
|
2415 |
|
|
ppc64_elf_create_dynamic_sections (dynobj, info)
|
2416 |
|
|
bfd *dynobj;
|
2417 |
|
|
struct bfd_link_info *info;
|
2418 |
|
|
{
|
2419 |
|
|
struct ppc_link_hash_table *htab;
|
2420 |
|
|
|
2421 |
|
|
htab = ppc_hash_table (info);
|
2422 |
|
|
if (!htab->sgot && !create_got_section (dynobj, info))
|
2423 |
|
|
return false;
|
2424 |
|
|
|
2425 |
|
|
if (!_bfd_elf_create_dynamic_sections (dynobj, info))
|
2426 |
|
|
return false;
|
2427 |
|
|
|
2428 |
|
|
htab->splt = bfd_get_section_by_name (dynobj, ".plt");
|
2429 |
|
|
htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
|
2430 |
|
|
htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
|
2431 |
|
|
if (!info->shared)
|
2432 |
|
|
htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
|
2433 |
|
|
|
2434 |
|
|
if (!htab->splt || !htab->srelplt || !htab->sdynbss
|
2435 |
|
|
|| (!info->shared && !htab->srelbss))
|
2436 |
|
|
abort ();
|
2437 |
|
|
|
2438 |
|
|
return true;
|
2439 |
|
|
}
|
2440 |
|
|
|
2441 |
|
|
/* Copy the extra info we tack onto an elf_link_hash_entry. */
|
2442 |
|
|
|
2443 |
|
|
static void
|
2444 |
|
|
ppc64_elf_copy_indirect_symbol (bed, dir, ind)
|
2445 |
|
|
struct elf_backend_data *bed;
|
2446 |
|
|
struct elf_link_hash_entry *dir, *ind;
|
2447 |
|
|
{
|
2448 |
|
|
struct ppc_link_hash_entry *edir, *eind;
|
2449 |
|
|
|
2450 |
|
|
edir = (struct ppc_link_hash_entry *) dir;
|
2451 |
|
|
eind = (struct ppc_link_hash_entry *) ind;
|
2452 |
|
|
|
2453 |
|
|
if (eind->dyn_relocs != NULL)
|
2454 |
|
|
{
|
2455 |
|
|
if (edir->dyn_relocs != NULL)
|
2456 |
|
|
{
|
2457 |
|
|
struct ppc_dyn_relocs **pp;
|
2458 |
|
|
struct ppc_dyn_relocs *p;
|
2459 |
|
|
|
2460 |
|
|
if (ind->root.type == bfd_link_hash_indirect)
|
2461 |
|
|
abort ();
|
2462 |
|
|
|
2463 |
|
|
/* Add reloc counts against the weak sym to the strong sym
|
2464 |
|
|
list. Merge any entries against the same section. */
|
2465 |
|
|
for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
|
2466 |
|
|
{
|
2467 |
|
|
struct ppc_dyn_relocs *q;
|
2468 |
|
|
|
2469 |
|
|
for (q = edir->dyn_relocs; q != NULL; q = q->next)
|
2470 |
|
|
if (q->sec == p->sec)
|
2471 |
|
|
{
|
2472 |
|
|
q->pc_count += p->pc_count;
|
2473 |
|
|
q->count += p->count;
|
2474 |
|
|
*pp = p->next;
|
2475 |
|
|
break;
|
2476 |
|
|
}
|
2477 |
|
|
if (q == NULL)
|
2478 |
|
|
pp = &p->next;
|
2479 |
|
|
}
|
2480 |
|
|
*pp = edir->dyn_relocs;
|
2481 |
|
|
}
|
2482 |
|
|
|
2483 |
|
|
edir->dyn_relocs = eind->dyn_relocs;
|
2484 |
|
|
eind->dyn_relocs = NULL;
|
2485 |
|
|
}
|
2486 |
|
|
|
2487 |
|
|
edir->is_func |= eind->is_func;
|
2488 |
|
|
edir->is_func_descriptor |= eind->is_func_descriptor;
|
2489 |
|
|
edir->is_entry |= eind->is_entry;
|
2490 |
|
|
|
2491 |
|
|
_bfd_elf_link_hash_copy_indirect (bed, dir, ind);
|
2492 |
|
|
}
|
2493 |
|
|
|
2494 |
|
|
/* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and
|
2495 |
|
|
symbols undefined on the command-line. */
|
2496 |
|
|
|
2497 |
|
|
boolean
|
2498 |
|
|
ppc64_elf_mark_entry_syms (info)
|
2499 |
|
|
struct bfd_link_info *info;
|
2500 |
|
|
{
|
2501 |
|
|
struct ppc_link_hash_table *htab;
|
2502 |
|
|
struct bfd_sym_chain *sym;
|
2503 |
|
|
|
2504 |
|
|
htab = ppc_hash_table (info);
|
2505 |
|
|
for (sym = info->gc_sym_list; sym; sym = sym->next)
|
2506 |
|
|
{
|
2507 |
|
|
struct elf_link_hash_entry *h;
|
2508 |
|
|
|
2509 |
|
|
h = elf_link_hash_lookup (&htab->elf, sym->name, false, false, false);
|
2510 |
|
|
if (h != NULL)
|
2511 |
|
|
((struct ppc_link_hash_entry *) h)->is_entry = 1;
|
2512 |
|
|
}
|
2513 |
|
|
return true;
|
2514 |
|
|
}
|
2515 |
|
|
|
2516 |
|
|
/* Look through the relocs for a section during the first phase, and
|
2517 |
|
|
calculate needed space in the global offset table, procedure
|
2518 |
|
|
linkage table, and dynamic reloc sections. */
|
2519 |
|
|
|
2520 |
|
|
static boolean
|
2521 |
|
|
ppc64_elf_check_relocs (abfd, info, sec, relocs)
|
2522 |
|
|
bfd *abfd;
|
2523 |
|
|
struct bfd_link_info *info;
|
2524 |
|
|
asection *sec;
|
2525 |
|
|
const Elf_Internal_Rela *relocs;
|
2526 |
|
|
{
|
2527 |
|
|
struct ppc_link_hash_table *htab;
|
2528 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
2529 |
|
|
struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
|
2530 |
|
|
const Elf_Internal_Rela *rel;
|
2531 |
|
|
const Elf_Internal_Rela *rel_end;
|
2532 |
|
|
asection *sreloc;
|
2533 |
|
|
asection **opd_sym_map;
|
2534 |
|
|
|
2535 |
|
|
if (info->relocateable)
|
2536 |
|
|
return true;
|
2537 |
|
|
|
2538 |
|
|
htab = ppc_hash_table (info);
|
2539 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
2540 |
|
|
|
2541 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
2542 |
|
|
sym_hashes_end = (sym_hashes
|
2543 |
|
|
+ symtab_hdr->sh_size / sizeof (Elf64_External_Sym)
|
2544 |
|
|
- symtab_hdr->sh_info);
|
2545 |
|
|
|
2546 |
|
|
sreloc = NULL;
|
2547 |
|
|
opd_sym_map = NULL;
|
2548 |
|
|
if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0)
|
2549 |
|
|
{
|
2550 |
|
|
/* Garbage collection needs some extra help with .opd sections.
|
2551 |
|
|
We don't want to necessarily keep everything referenced by
|
2552 |
|
|
relocs in .opd, as that would keep all functions. Instead,
|
2553 |
|
|
if we reference an .opd symbol (a function descriptor), we
|
2554 |
|
|
want to keep the function code symbol's section. This is
|
2555 |
|
|
easy for global symbols, but for local syms we need to keep
|
2556 |
|
|
information about the associated function section. Later, if
|
2557 |
|
|
edit_opd deletes entries, we'll use this array to adjust
|
2558 |
|
|
local syms in .opd. */
|
2559 |
|
|
union opd_info {
|
2560 |
|
|
asection *func_section;
|
2561 |
|
|
long entry_adjust;
|
2562 |
|
|
};
|
2563 |
|
|
bfd_size_type amt;
|
2564 |
|
|
|
2565 |
|
|
amt = sec->_raw_size * sizeof (union opd_info) / 24;
|
2566 |
|
|
opd_sym_map = (asection **) bfd_zalloc (abfd, amt);
|
2567 |
|
|
if (opd_sym_map == NULL)
|
2568 |
|
|
return false;
|
2569 |
|
|
elf_section_data (sec)->tdata = opd_sym_map;
|
2570 |
|
|
}
|
2571 |
|
|
|
2572 |
|
|
if (htab->elf.dynobj == NULL)
|
2573 |
|
|
htab->elf.dynobj = abfd;
|
2574 |
|
|
if (htab->sfpr == NULL
|
2575 |
|
|
&& !create_linkage_sections (htab->elf.dynobj, info))
|
2576 |
|
|
return false;
|
2577 |
|
|
|
2578 |
|
|
rel_end = relocs + sec->reloc_count;
|
2579 |
|
|
for (rel = relocs; rel < rel_end; rel++)
|
2580 |
|
|
{
|
2581 |
|
|
unsigned long r_symndx;
|
2582 |
|
|
struct elf_link_hash_entry *h;
|
2583 |
|
|
enum elf_ppc_reloc_type r_type;
|
2584 |
|
|
|
2585 |
|
|
r_symndx = ELF64_R_SYM (rel->r_info);
|
2586 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
2587 |
|
|
h = NULL;
|
2588 |
|
|
else
|
2589 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
2590 |
|
|
|
2591 |
|
|
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
|
2592 |
|
|
switch (r_type)
|
2593 |
|
|
{
|
2594 |
|
|
/* GOT16 relocations */
|
2595 |
|
|
case R_PPC64_GOT16:
|
2596 |
|
|
case R_PPC64_GOT16_DS:
|
2597 |
|
|
case R_PPC64_GOT16_HA:
|
2598 |
|
|
case R_PPC64_GOT16_HI:
|
2599 |
|
|
case R_PPC64_GOT16_LO:
|
2600 |
|
|
case R_PPC64_GOT16_LO_DS:
|
2601 |
|
|
|
2602 |
|
|
/* This symbol requires a global offset table entry. */
|
2603 |
|
|
if (htab->sgot == NULL
|
2604 |
|
|
&& !create_got_section (htab->elf.dynobj, info))
|
2605 |
|
|
return false;
|
2606 |
|
|
|
2607 |
|
|
if (h != NULL)
|
2608 |
|
|
{
|
2609 |
|
|
h->got.refcount += 1;
|
2610 |
|
|
}
|
2611 |
|
|
else
|
2612 |
|
|
{
|
2613 |
|
|
bfd_signed_vma *local_got_refcounts;
|
2614 |
|
|
|
2615 |
|
|
/* This is a global offset table entry for a local symbol. */
|
2616 |
|
|
local_got_refcounts = elf_local_got_refcounts (abfd);
|
2617 |
|
|
if (local_got_refcounts == NULL)
|
2618 |
|
|
{
|
2619 |
|
|
bfd_size_type size;
|
2620 |
|
|
|
2621 |
|
|
size = symtab_hdr->sh_info;
|
2622 |
|
|
size *= sizeof (bfd_signed_vma);
|
2623 |
|
|
local_got_refcounts = ((bfd_signed_vma *)
|
2624 |
|
|
bfd_zalloc (abfd, size));
|
2625 |
|
|
if (local_got_refcounts == NULL)
|
2626 |
|
|
return false;
|
2627 |
|
|
elf_local_got_refcounts (abfd) = local_got_refcounts;
|
2628 |
|
|
}
|
2629 |
|
|
local_got_refcounts[r_symndx] += 1;
|
2630 |
|
|
}
|
2631 |
|
|
break;
|
2632 |
|
|
|
2633 |
|
|
case R_PPC64_PLT16_HA:
|
2634 |
|
|
case R_PPC64_PLT16_HI:
|
2635 |
|
|
case R_PPC64_PLT16_LO:
|
2636 |
|
|
case R_PPC64_PLT32:
|
2637 |
|
|
case R_PPC64_PLT64:
|
2638 |
|
|
/* This symbol requires a procedure linkage table entry. We
|
2639 |
|
|
actually build the entry in adjust_dynamic_symbol,
|
2640 |
|
|
because this might be a case of linking PIC code without
|
2641 |
|
|
linking in any dynamic objects, in which case we don't
|
2642 |
|
|
need to generate a procedure linkage table after all. */
|
2643 |
|
|
if (h == NULL)
|
2644 |
|
|
{
|
2645 |
|
|
/* It does not make sense to have a procedure linkage
|
2646 |
|
|
table entry for a local symbol. */
|
2647 |
|
|
bfd_set_error (bfd_error_bad_value);
|
2648 |
|
|
return false;
|
2649 |
|
|
}
|
2650 |
|
|
|
2651 |
|
|
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
|
2652 |
|
|
h->plt.refcount += 1;
|
2653 |
|
|
((struct ppc_link_hash_entry *) h)->is_func = 1;
|
2654 |
|
|
break;
|
2655 |
|
|
|
2656 |
|
|
/* The following relocations don't need to propagate the
|
2657 |
|
|
relocation if linking a shared object since they are
|
2658 |
|
|
section relative. */
|
2659 |
|
|
case R_PPC64_SECTOFF:
|
2660 |
|
|
case R_PPC64_SECTOFF_LO:
|
2661 |
|
|
case R_PPC64_SECTOFF_HI:
|
2662 |
|
|
case R_PPC64_SECTOFF_HA:
|
2663 |
|
|
case R_PPC64_SECTOFF_DS:
|
2664 |
|
|
case R_PPC64_SECTOFF_LO_DS:
|
2665 |
|
|
case R_PPC64_TOC16:
|
2666 |
|
|
case R_PPC64_TOC16_LO:
|
2667 |
|
|
case R_PPC64_TOC16_HI:
|
2668 |
|
|
case R_PPC64_TOC16_HA:
|
2669 |
|
|
case R_PPC64_TOC16_DS:
|
2670 |
|
|
case R_PPC64_TOC16_LO_DS:
|
2671 |
|
|
break;
|
2672 |
|
|
|
2673 |
|
|
/* This relocation describes the C++ object vtable hierarchy.
|
2674 |
|
|
Reconstruct it for later use during GC. */
|
2675 |
|
|
case R_PPC64_GNU_VTINHERIT:
|
2676 |
|
|
if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
2677 |
|
|
return false;
|
2678 |
|
|
break;
|
2679 |
|
|
|
2680 |
|
|
/* This relocation describes which C++ vtable entries are actually
|
2681 |
|
|
used. Record for later use during GC. */
|
2682 |
|
|
case R_PPC64_GNU_VTENTRY:
|
2683 |
|
|
if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
2684 |
|
|
return false;
|
2685 |
|
|
break;
|
2686 |
|
|
|
2687 |
|
|
case R_PPC64_REL14:
|
2688 |
|
|
case R_PPC64_REL14_BRTAKEN:
|
2689 |
|
|
case R_PPC64_REL14_BRNTAKEN:
|
2690 |
|
|
htab->has_14bit_branch = 1;
|
2691 |
|
|
/* Fall through. */
|
2692 |
|
|
|
2693 |
|
|
case R_PPC64_REL24:
|
2694 |
|
|
if (h != NULL
|
2695 |
|
|
&& h->root.root.string[0] == '.'
|
2696 |
|
|
&& h->root.root.string[1] != 0)
|
2697 |
|
|
{
|
2698 |
|
|
/* We may need a .plt entry if the function this reloc
|
2699 |
|
|
refers to is in a shared lib. */
|
2700 |
|
|
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
|
2701 |
|
|
h->plt.refcount += 1;
|
2702 |
|
|
((struct ppc_link_hash_entry *) h)->is_func = 1;
|
2703 |
|
|
}
|
2704 |
|
|
break;
|
2705 |
|
|
|
2706 |
|
|
case R_PPC64_ADDR64:
|
2707 |
|
|
if (opd_sym_map != NULL
|
2708 |
|
|
&& h != NULL
|
2709 |
|
|
&& h->root.root.string[0] == '.'
|
2710 |
|
|
&& h->root.root.string[1] != 0)
|
2711 |
|
|
{
|
2712 |
|
|
struct elf_link_hash_entry *fdh;
|
2713 |
|
|
|
2714 |
|
|
fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
|
2715 |
|
|
false, false, false);
|
2716 |
|
|
if (fdh != NULL)
|
2717 |
|
|
{
|
2718 |
|
|
((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
|
2719 |
|
|
((struct ppc_link_hash_entry *) fdh)->oh = h;
|
2720 |
|
|
((struct ppc_link_hash_entry *) h)->is_func = 1;
|
2721 |
|
|
((struct ppc_link_hash_entry *) h)->oh = fdh;
|
2722 |
|
|
}
|
2723 |
|
|
}
|
2724 |
|
|
if (opd_sym_map != NULL
|
2725 |
|
|
&& h == NULL
|
2726 |
|
|
&& rel + 1 < rel_end
|
2727 |
|
|
&& ((enum elf_ppc_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info)
|
2728 |
|
|
== R_PPC64_TOC))
|
2729 |
|
|
{
|
2730 |
|
|
asection *s;
|
2731 |
|
|
|
2732 |
|
|
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
|
2733 |
|
|
r_symndx);
|
2734 |
|
|
if (s == NULL)
|
2735 |
|
|
return false;
|
2736 |
|
|
else if (s != sec)
|
2737 |
|
|
opd_sym_map[rel->r_offset / 24] = s;
|
2738 |
|
|
}
|
2739 |
|
|
/* Fall through. */
|
2740 |
|
|
|
2741 |
|
|
case R_PPC64_REL64:
|
2742 |
|
|
case R_PPC64_REL32:
|
2743 |
|
|
case R_PPC64_ADDR14:
|
2744 |
|
|
case R_PPC64_ADDR14_BRNTAKEN:
|
2745 |
|
|
case R_PPC64_ADDR14_BRTAKEN:
|
2746 |
|
|
case R_PPC64_ADDR16:
|
2747 |
|
|
case R_PPC64_ADDR16_DS:
|
2748 |
|
|
case R_PPC64_ADDR16_HA:
|
2749 |
|
|
case R_PPC64_ADDR16_HI:
|
2750 |
|
|
case R_PPC64_ADDR16_HIGHER:
|
2751 |
|
|
case R_PPC64_ADDR16_HIGHERA:
|
2752 |
|
|
case R_PPC64_ADDR16_HIGHEST:
|
2753 |
|
|
case R_PPC64_ADDR16_HIGHESTA:
|
2754 |
|
|
case R_PPC64_ADDR16_LO:
|
2755 |
|
|
case R_PPC64_ADDR16_LO_DS:
|
2756 |
|
|
case R_PPC64_ADDR24:
|
2757 |
|
|
case R_PPC64_ADDR30:
|
2758 |
|
|
case R_PPC64_ADDR32:
|
2759 |
|
|
case R_PPC64_UADDR16:
|
2760 |
|
|
case R_PPC64_UADDR32:
|
2761 |
|
|
case R_PPC64_UADDR64:
|
2762 |
|
|
case R_PPC64_TOC:
|
2763 |
|
|
/* Don't propagate .opd relocs. */
|
2764 |
|
|
if (NO_OPD_RELOCS && opd_sym_map != NULL)
|
2765 |
|
|
break;
|
2766 |
|
|
|
2767 |
|
|
/* If we are creating a shared library, and this is a reloc
|
2768 |
|
|
against a global symbol, or a non PC relative reloc
|
2769 |
|
|
against a local symbol, then we need to copy the reloc
|
2770 |
|
|
into the shared library. However, if we are linking with
|
2771 |
|
|
-Bsymbolic, we do not need to copy a reloc against a
|
2772 |
|
|
global symbol which is defined in an object we are
|
2773 |
|
|
including in the link (i.e., DEF_REGULAR is set). At
|
2774 |
|
|
this point we have not seen all the input files, so it is
|
2775 |
|
|
possible that DEF_REGULAR is not set now but will be set
|
2776 |
|
|
later (it is never cleared). In case of a weak definition,
|
2777 |
|
|
DEF_REGULAR may be cleared later by a strong definition in
|
2778 |
|
|
a shared library. We account for that possibility below by
|
2779 |
|
|
storing information in the relocs_copied field of the hash
|
2780 |
|
|
table entry. A similar situation occurs when creating
|
2781 |
|
|
shared libraries and symbol visibility changes render the
|
2782 |
|
|
symbol local.
|
2783 |
|
|
|
2784 |
|
|
If on the other hand, we are creating an executable, we
|
2785 |
|
|
may need to keep relocations for symbols satisfied by a
|
2786 |
|
|
dynamic library if we manage to avoid copy relocs for the
|
2787 |
|
|
symbol. */
|
2788 |
|
|
if ((info->shared
|
2789 |
|
|
&& (sec->flags & SEC_ALLOC) != 0
|
2790 |
|
|
&& (IS_ABSOLUTE_RELOC (r_type)
|
2791 |
|
|
|| (h != NULL
|
2792 |
|
|
&& (! info->symbolic
|
2793 |
|
|
|| h->root.type == bfd_link_hash_defweak
|
2794 |
|
|
|| (h->elf_link_hash_flags
|
2795 |
|
|
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|
2796 |
|
|
|| (!info->shared
|
2797 |
|
|
&& (sec->flags & SEC_ALLOC) != 0
|
2798 |
|
|
&& h != NULL
|
2799 |
|
|
&& (h->root.type == bfd_link_hash_defweak
|
2800 |
|
|
|| (h->elf_link_hash_flags
|
2801 |
|
|
& ELF_LINK_HASH_DEF_REGULAR) == 0)))
|
2802 |
|
|
{
|
2803 |
|
|
struct ppc_dyn_relocs *p;
|
2804 |
|
|
struct ppc_dyn_relocs **head;
|
2805 |
|
|
|
2806 |
|
|
/* We must copy these reloc types into the output file.
|
2807 |
|
|
Create a reloc section in dynobj and make room for
|
2808 |
|
|
this reloc. */
|
2809 |
|
|
if (sreloc == NULL)
|
2810 |
|
|
{
|
2811 |
|
|
const char *name;
|
2812 |
|
|
bfd *dynobj;
|
2813 |
|
|
|
2814 |
|
|
name = (bfd_elf_string_from_elf_section
|
2815 |
|
|
(abfd,
|
2816 |
|
|
elf_elfheader (abfd)->e_shstrndx,
|
2817 |
|
|
elf_section_data (sec)->rel_hdr.sh_name));
|
2818 |
|
|
if (name == NULL)
|
2819 |
|
|
return false;
|
2820 |
|
|
|
2821 |
|
|
if (strncmp (name, ".rela", 5) != 0
|
2822 |
|
|
|| strcmp (bfd_get_section_name (abfd, sec),
|
2823 |
|
|
name + 5) != 0)
|
2824 |
|
|
{
|
2825 |
|
|
(*_bfd_error_handler)
|
2826 |
|
|
(_("%s: bad relocation section name `%s\'"),
|
2827 |
|
|
bfd_archive_filename (abfd), name);
|
2828 |
|
|
bfd_set_error (bfd_error_bad_value);
|
2829 |
|
|
}
|
2830 |
|
|
|
2831 |
|
|
dynobj = htab->elf.dynobj;
|
2832 |
|
|
sreloc = bfd_get_section_by_name (dynobj, name);
|
2833 |
|
|
if (sreloc == NULL)
|
2834 |
|
|
{
|
2835 |
|
|
flagword flags;
|
2836 |
|
|
|
2837 |
|
|
sreloc = bfd_make_section (dynobj, name);
|
2838 |
|
|
flags = (SEC_HAS_CONTENTS | SEC_READONLY
|
2839 |
|
|
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
2840 |
|
|
if ((sec->flags & SEC_ALLOC) != 0)
|
2841 |
|
|
flags |= SEC_ALLOC | SEC_LOAD;
|
2842 |
|
|
if (sreloc == NULL
|
2843 |
|
|
|| ! bfd_set_section_flags (dynobj, sreloc, flags)
|
2844 |
|
|
|| ! bfd_set_section_alignment (dynobj, sreloc, 3))
|
2845 |
|
|
return false;
|
2846 |
|
|
}
|
2847 |
|
|
elf_section_data (sec)->sreloc = sreloc;
|
2848 |
|
|
}
|
2849 |
|
|
|
2850 |
|
|
/* If this is a global symbol, we count the number of
|
2851 |
|
|
relocations we need for this symbol. */
|
2852 |
|
|
if (h != NULL)
|
2853 |
|
|
{
|
2854 |
|
|
head = &((struct ppc_link_hash_entry *) h)->dyn_relocs;
|
2855 |
|
|
}
|
2856 |
|
|
else
|
2857 |
|
|
{
|
2858 |
|
|
/* Track dynamic relocs needed for local syms too.
|
2859 |
|
|
We really need local syms available to do this
|
2860 |
|
|
easily. Oh well. */
|
2861 |
|
|
|
2862 |
|
|
asection *s;
|
2863 |
|
|
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
|
2864 |
|
|
sec, r_symndx);
|
2865 |
|
|
if (s == NULL)
|
2866 |
|
|
return false;
|
2867 |
|
|
|
2868 |
|
|
head = ((struct ppc_dyn_relocs **)
|
2869 |
|
|
&elf_section_data (s)->local_dynrel);
|
2870 |
|
|
}
|
2871 |
|
|
|
2872 |
|
|
p = *head;
|
2873 |
|
|
if (p == NULL || p->sec != sec)
|
2874 |
|
|
{
|
2875 |
|
|
p = ((struct ppc_dyn_relocs *)
|
2876 |
|
|
bfd_alloc (htab->elf.dynobj,
|
2877 |
|
|
(bfd_size_type) sizeof *p));
|
2878 |
|
|
if (p == NULL)
|
2879 |
|
|
return false;
|
2880 |
|
|
p->next = *head;
|
2881 |
|
|
*head = p;
|
2882 |
|
|
p->sec = sec;
|
2883 |
|
|
p->count = 0;
|
2884 |
|
|
p->pc_count = 0;
|
2885 |
|
|
}
|
2886 |
|
|
|
2887 |
|
|
p->count += 1;
|
2888 |
|
|
if (!IS_ABSOLUTE_RELOC (r_type))
|
2889 |
|
|
p->pc_count += 1;
|
2890 |
|
|
}
|
2891 |
|
|
break;
|
2892 |
|
|
|
2893 |
|
|
default:
|
2894 |
|
|
break;
|
2895 |
|
|
}
|
2896 |
|
|
}
|
2897 |
|
|
|
2898 |
|
|
return true;
|
2899 |
|
|
}
|
2900 |
|
|
|
2901 |
|
|
/* Return the section that should be marked against GC for a given
|
2902 |
|
|
relocation. */
|
2903 |
|
|
|
2904 |
|
|
static asection *
|
2905 |
|
|
ppc64_elf_gc_mark_hook (sec, info, rel, h, sym)
|
2906 |
|
|
asection *sec;
|
2907 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
2908 |
|
|
Elf_Internal_Rela *rel;
|
2909 |
|
|
struct elf_link_hash_entry *h;
|
2910 |
|
|
Elf_Internal_Sym *sym;
|
2911 |
|
|
{
|
2912 |
|
|
asection *rsec = NULL;
|
2913 |
|
|
|
2914 |
|
|
if (h != NULL)
|
2915 |
|
|
{
|
2916 |
|
|
enum elf_ppc_reloc_type r_type;
|
2917 |
|
|
struct ppc_link_hash_entry *fdh;
|
2918 |
|
|
|
2919 |
|
|
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
|
2920 |
|
|
switch (r_type)
|
2921 |
|
|
{
|
2922 |
|
|
case R_PPC64_GNU_VTINHERIT:
|
2923 |
|
|
case R_PPC64_GNU_VTENTRY:
|
2924 |
|
|
break;
|
2925 |
|
|
|
2926 |
|
|
default:
|
2927 |
|
|
switch (h->root.type)
|
2928 |
|
|
{
|
2929 |
|
|
case bfd_link_hash_defined:
|
2930 |
|
|
case bfd_link_hash_defweak:
|
2931 |
|
|
fdh = (struct ppc_link_hash_entry *) h;
|
2932 |
|
|
|
2933 |
|
|
/* Function descriptor syms cause the associated
|
2934 |
|
|
function code sym section to be marked. */
|
2935 |
|
|
if (fdh->is_func_descriptor)
|
2936 |
|
|
rsec = fdh->oh->root.u.def.section;
|
2937 |
|
|
|
2938 |
|
|
/* Function entry syms return NULL if they are in .opd
|
2939 |
|
|
and are not ._start (or others undefined on the ld
|
2940 |
|
|
command line). Thus we avoid marking all function
|
2941 |
|
|
sections, as all functions are referenced in .opd. */
|
2942 |
|
|
else if ((fdh->oh != NULL
|
2943 |
|
|
&& ((struct ppc_link_hash_entry *) fdh->oh)->is_entry)
|
2944 |
|
|
|| elf_section_data (sec)->tdata == NULL)
|
2945 |
|
|
rsec = h->root.u.def.section;
|
2946 |
|
|
break;
|
2947 |
|
|
|
2948 |
|
|
case bfd_link_hash_common:
|
2949 |
|
|
rsec = h->root.u.c.p->section;
|
2950 |
|
|
break;
|
2951 |
|
|
|
2952 |
|
|
default:
|
2953 |
|
|
break;
|
2954 |
|
|
}
|
2955 |
|
|
}
|
2956 |
|
|
}
|
2957 |
|
|
else
|
2958 |
|
|
{
|
2959 |
|
|
asection **opd_sym_section;
|
2960 |
|
|
|
2961 |
|
|
rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx);
|
2962 |
|
|
opd_sym_section = (asection **) elf_section_data (rsec)->tdata;
|
2963 |
|
|
if (opd_sym_section != NULL)
|
2964 |
|
|
rsec = opd_sym_section[sym->st_value / 24];
|
2965 |
|
|
else if (elf_section_data (sec)->tdata != NULL)
|
2966 |
|
|
rsec = NULL;
|
2967 |
|
|
}
|
2968 |
|
|
|
2969 |
|
|
return rsec;
|
2970 |
|
|
}
|
2971 |
|
|
|
2972 |
|
|
/* Update the .got, .plt. and dynamic reloc reference counts for the
|
2973 |
|
|
section being removed. */
|
2974 |
|
|
|
2975 |
|
|
static boolean
|
2976 |
|
|
ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs)
|
2977 |
|
|
bfd *abfd;
|
2978 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
2979 |
|
|
asection *sec;
|
2980 |
|
|
const Elf_Internal_Rela *relocs;
|
2981 |
|
|
{
|
2982 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
2983 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
2984 |
|
|
bfd_signed_vma *local_got_refcounts;
|
2985 |
|
|
const Elf_Internal_Rela *rel, *relend;
|
2986 |
|
|
|
2987 |
|
|
elf_section_data (sec)->local_dynrel = NULL;
|
2988 |
|
|
|
2989 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
2990 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
2991 |
|
|
local_got_refcounts = elf_local_got_refcounts (abfd);
|
2992 |
|
|
|
2993 |
|
|
relend = relocs + sec->reloc_count;
|
2994 |
|
|
for (rel = relocs; rel < relend; rel++)
|
2995 |
|
|
{
|
2996 |
|
|
unsigned long r_symndx;
|
2997 |
|
|
enum elf_ppc_reloc_type r_type;
|
2998 |
|
|
struct elf_link_hash_entry *h;
|
2999 |
|
|
|
3000 |
|
|
r_symndx = ELF64_R_SYM (rel->r_info);
|
3001 |
|
|
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
|
3002 |
|
|
switch (r_type)
|
3003 |
|
|
{
|
3004 |
|
|
case R_PPC64_GOT16:
|
3005 |
|
|
case R_PPC64_GOT16_DS:
|
3006 |
|
|
case R_PPC64_GOT16_HA:
|
3007 |
|
|
case R_PPC64_GOT16_HI:
|
3008 |
|
|
case R_PPC64_GOT16_LO:
|
3009 |
|
|
case R_PPC64_GOT16_LO_DS:
|
3010 |
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
3011 |
|
|
{
|
3012 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
3013 |
|
|
if (h->got.refcount > 0)
|
3014 |
|
|
h->got.refcount--;
|
3015 |
|
|
}
|
3016 |
|
|
else
|
3017 |
|
|
{
|
3018 |
|
|
if (local_got_refcounts[r_symndx] > 0)
|
3019 |
|
|
local_got_refcounts[r_symndx]--;
|
3020 |
|
|
}
|
3021 |
|
|
break;
|
3022 |
|
|
|
3023 |
|
|
case R_PPC64_PLT16_HA:
|
3024 |
|
|
case R_PPC64_PLT16_HI:
|
3025 |
|
|
case R_PPC64_PLT16_LO:
|
3026 |
|
|
case R_PPC64_PLT32:
|
3027 |
|
|
case R_PPC64_PLT64:
|
3028 |
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
3029 |
|
|
{
|
3030 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
3031 |
|
|
if (h->plt.refcount > 0)
|
3032 |
|
|
h->plt.refcount--;
|
3033 |
|
|
}
|
3034 |
|
|
break;
|
3035 |
|
|
|
3036 |
|
|
case R_PPC64_REL14:
|
3037 |
|
|
case R_PPC64_REL14_BRNTAKEN:
|
3038 |
|
|
case R_PPC64_REL14_BRTAKEN:
|
3039 |
|
|
case R_PPC64_REL24:
|
3040 |
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
3041 |
|
|
{
|
3042 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
3043 |
|
|
if (h->plt.refcount > 0)
|
3044 |
|
|
h->plt.refcount--;
|
3045 |
|
|
}
|
3046 |
|
|
break;
|
3047 |
|
|
|
3048 |
|
|
case R_PPC64_REL32:
|
3049 |
|
|
case R_PPC64_REL64:
|
3050 |
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
3051 |
|
|
{
|
3052 |
|
|
struct ppc_link_hash_entry *eh;
|
3053 |
|
|
struct ppc_dyn_relocs **pp;
|
3054 |
|
|
struct ppc_dyn_relocs *p;
|
3055 |
|
|
|
3056 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
3057 |
|
|
eh = (struct ppc_link_hash_entry *) h;
|
3058 |
|
|
|
3059 |
|
|
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
|
3060 |
|
|
if (p->sec == sec)
|
3061 |
|
|
{
|
3062 |
|
|
p->pc_count -= 1;
|
3063 |
|
|
p->count -= 1;
|
3064 |
|
|
if (p->count == 0)
|
3065 |
|
|
*pp = p->next;
|
3066 |
|
|
break;
|
3067 |
|
|
}
|
3068 |
|
|
}
|
3069 |
|
|
break;
|
3070 |
|
|
|
3071 |
|
|
case R_PPC64_ADDR14:
|
3072 |
|
|
case R_PPC64_ADDR14_BRNTAKEN:
|
3073 |
|
|
case R_PPC64_ADDR14_BRTAKEN:
|
3074 |
|
|
case R_PPC64_ADDR16:
|
3075 |
|
|
case R_PPC64_ADDR16_DS:
|
3076 |
|
|
case R_PPC64_ADDR16_HA:
|
3077 |
|
|
case R_PPC64_ADDR16_HI:
|
3078 |
|
|
case R_PPC64_ADDR16_HIGHER:
|
3079 |
|
|
case R_PPC64_ADDR16_HIGHERA:
|
3080 |
|
|
case R_PPC64_ADDR16_HIGHEST:
|
3081 |
|
|
case R_PPC64_ADDR16_HIGHESTA:
|
3082 |
|
|
case R_PPC64_ADDR16_LO:
|
3083 |
|
|
case R_PPC64_ADDR16_LO_DS:
|
3084 |
|
|
case R_PPC64_ADDR24:
|
3085 |
|
|
case R_PPC64_ADDR30:
|
3086 |
|
|
case R_PPC64_ADDR32:
|
3087 |
|
|
case R_PPC64_ADDR64:
|
3088 |
|
|
case R_PPC64_UADDR16:
|
3089 |
|
|
case R_PPC64_UADDR32:
|
3090 |
|
|
case R_PPC64_UADDR64:
|
3091 |
|
|
case R_PPC64_TOC:
|
3092 |
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
3093 |
|
|
{
|
3094 |
|
|
struct ppc_link_hash_entry *eh;
|
3095 |
|
|
struct ppc_dyn_relocs **pp;
|
3096 |
|
|
struct ppc_dyn_relocs *p;
|
3097 |
|
|
|
3098 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
3099 |
|
|
eh = (struct ppc_link_hash_entry *) h;
|
3100 |
|
|
|
3101 |
|
|
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
|
3102 |
|
|
if (p->sec == sec)
|
3103 |
|
|
{
|
3104 |
|
|
p->count -= 1;
|
3105 |
|
|
if (p->count == 0)
|
3106 |
|
|
*pp = p->next;
|
3107 |
|
|
break;
|
3108 |
|
|
}
|
3109 |
|
|
}
|
3110 |
|
|
break;
|
3111 |
|
|
|
3112 |
|
|
default:
|
3113 |
|
|
break;
|
3114 |
|
|
}
|
3115 |
|
|
}
|
3116 |
|
|
return true;
|
3117 |
|
|
}
|
3118 |
|
|
|
3119 |
|
|
/* Called via elf_link_hash_traverse to transfer dynamic linking
|
3120 |
|
|
information on function code symbol entries to their corresponding
|
3121 |
|
|
function descriptor symbol entries. */
|
3122 |
|
|
static boolean
|
3123 |
|
|
func_desc_adjust (h, inf)
|
3124 |
|
|
struct elf_link_hash_entry *h;
|
3125 |
|
|
PTR inf;
|
3126 |
|
|
{
|
3127 |
|
|
struct bfd_link_info *info;
|
3128 |
|
|
struct ppc_link_hash_table *htab;
|
3129 |
|
|
|
3130 |
|
|
if (h->root.type == bfd_link_hash_indirect)
|
3131 |
|
|
return true;
|
3132 |
|
|
|
3133 |
|
|
if (h->root.type == bfd_link_hash_warning)
|
3134 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
3135 |
|
|
|
3136 |
|
|
info = (struct bfd_link_info *) inf;
|
3137 |
|
|
htab = ppc_hash_table (info);
|
3138 |
|
|
|
3139 |
|
|
/* If this is a function code symbol, transfer dynamic linking
|
3140 |
|
|
information to the function descriptor symbol. */
|
3141 |
|
|
if (!((struct ppc_link_hash_entry *) h)->is_func)
|
3142 |
|
|
return true;
|
3143 |
|
|
|
3144 |
|
|
if (h->root.type == bfd_link_hash_undefweak
|
3145 |
|
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR))
|
3146 |
|
|
htab->have_undefweak = true;
|
3147 |
|
|
|
3148 |
|
|
if (h->plt.refcount > 0
|
3149 |
|
|
&& h->root.root.string[0] == '.'
|
3150 |
|
|
&& h->root.root.string[1] != '\0')
|
3151 |
|
|
{
|
3152 |
|
|
struct elf_link_hash_entry *fdh = ((struct ppc_link_hash_entry *) h)->oh;
|
3153 |
|
|
boolean force_local;
|
3154 |
|
|
|
3155 |
|
|
/* Find the corresponding function descriptor symbol. Create it
|
3156 |
|
|
as undefined if necessary. */
|
3157 |
|
|
|
3158 |
|
|
if (fdh == NULL)
|
3159 |
|
|
fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1,
|
3160 |
|
|
false, false, true);
|
3161 |
|
|
|
3162 |
|
|
if (fdh == NULL
|
3163 |
|
|
&& info->shared
|
3164 |
|
|
&& (h->root.type == bfd_link_hash_undefined
|
3165 |
|
|
|| h->root.type == bfd_link_hash_undefweak))
|
3166 |
|
|
{
|
3167 |
|
|
bfd *abfd;
|
3168 |
|
|
asymbol *newsym;
|
3169 |
|
|
|
3170 |
|
|
abfd = h->root.u.undef.abfd;
|
3171 |
|
|
newsym = bfd_make_empty_symbol (abfd);
|
3172 |
|
|
newsym->name = h->root.root.string + 1;
|
3173 |
|
|
newsym->section = bfd_und_section_ptr;
|
3174 |
|
|
newsym->value = 0;
|
3175 |
|
|
newsym->flags = BSF_OBJECT;
|
3176 |
|
|
if (h->root.type == bfd_link_hash_undefweak)
|
3177 |
|
|
newsym->flags |= BSF_WEAK;
|
3178 |
|
|
|
3179 |
|
|
if ( !(_bfd_generic_link_add_one_symbol
|
3180 |
|
|
(info, abfd, newsym->name, newsym->flags,
|
3181 |
|
|
newsym->section, newsym->value, NULL, false, false,
|
3182 |
|
|
(struct bfd_link_hash_entry **) &fdh)))
|
3183 |
|
|
{
|
3184 |
|
|
return false;
|
3185 |
|
|
}
|
3186 |
|
|
fdh->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
|
3187 |
|
|
}
|
3188 |
|
|
|
3189 |
|
|
if (fdh != NULL
|
3190 |
|
|
&& (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
|
3191 |
|
|
&& (info->shared
|
3192 |
|
|
|| (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
3193 |
|
|
|| (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0))
|
3194 |
|
|
{
|
3195 |
|
|
if (fdh->dynindx == -1)
|
3196 |
|
|
if (! bfd_elf64_link_record_dynamic_symbol (info, fdh))
|
3197 |
|
|
return false;
|
3198 |
|
|
fdh->elf_link_hash_flags |= (h->elf_link_hash_flags
|
3199 |
|
|
& (ELF_LINK_HASH_REF_REGULAR
|
3200 |
|
|
| ELF_LINK_HASH_REF_DYNAMIC
|
3201 |
|
|
| ELF_LINK_HASH_REF_REGULAR_NONWEAK
|
3202 |
|
|
| ELF_LINK_NON_GOT_REF));
|
3203 |
|
|
if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
|
3204 |
|
|
{
|
3205 |
|
|
fdh->plt.refcount = h->plt.refcount;
|
3206 |
|
|
fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
|
3207 |
|
|
}
|
3208 |
|
|
((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1;
|
3209 |
|
|
((struct ppc_link_hash_entry *) fdh)->oh = h;
|
3210 |
|
|
((struct ppc_link_hash_entry *) h)->oh = fdh;
|
3211 |
|
|
}
|
3212 |
|
|
|
3213 |
|
|
/* Now that the info is on the function descriptor, clear the
|
3214 |
|
|
function code sym info. Any function code syms for which we
|
3215 |
|
|
don't have a definition in a regular file, we force local.
|
3216 |
|
|
This prevents a shared library from exporting syms that have
|
3217 |
|
|
been imported from another library. Function code syms that
|
3218 |
|
|
are really in the library we must leave global to prevent the
|
3219 |
|
|
linker dragging in a definition from a static library. */
|
3220 |
|
|
force_local = (info->shared
|
3221 |
|
|
&& ((h->elf_link_hash_flags
|
3222 |
|
|
& ELF_LINK_HASH_DEF_REGULAR) == 0
|
3223 |
|
|
|| fdh == NULL
|
3224 |
|
|
|| (fdh->elf_link_hash_flags
|
3225 |
|
|
& ELF_LINK_HASH_DEF_REGULAR) == 0
|
3226 |
|
|
|| (fdh->elf_link_hash_flags
|
3227 |
|
|
& ELF_LINK_FORCED_LOCAL) != 0));
|
3228 |
|
|
_bfd_elf_link_hash_hide_symbol (info, h, force_local);
|
3229 |
|
|
}
|
3230 |
|
|
|
3231 |
|
|
return true;
|
3232 |
|
|
}
|
3233 |
|
|
|
3234 |
|
|
#define MIN_SAVE_FPR 14
|
3235 |
|
|
#define MAX_SAVE_FPR 31
|
3236 |
|
|
|
3237 |
|
|
/* Called near the start of bfd_elf_size_dynamic_sections. We use
|
3238 |
|
|
this hook to a) provide some gcc support functions, and b) transfer
|
3239 |
|
|
dynamic linking information gathered so far on function code symbol
|
3240 |
|
|
entries, to their corresponding function descriptor symbol entries. */
|
3241 |
|
|
static boolean
|
3242 |
|
|
ppc64_elf_func_desc_adjust (obfd, info)
|
3243 |
|
|
bfd *obfd ATTRIBUTE_UNUSED;
|
3244 |
|
|
struct bfd_link_info *info;
|
3245 |
|
|
{
|
3246 |
|
|
struct ppc_link_hash_table *htab;
|
3247 |
|
|
unsigned int lowest_savef = MAX_SAVE_FPR + 2;
|
3248 |
|
|
unsigned int lowest_restf = MAX_SAVE_FPR + 2;
|
3249 |
|
|
unsigned int i;
|
3250 |
|
|
struct elf_link_hash_entry *h;
|
3251 |
|
|
bfd_byte *p;
|
3252 |
|
|
char sym[10];
|
3253 |
|
|
|
3254 |
|
|
htab = ppc_hash_table (info);
|
3255 |
|
|
|
3256 |
|
|
if (htab->sfpr == NULL)
|
3257 |
|
|
/* We don't have any relocs. */
|
3258 |
|
|
return true;
|
3259 |
|
|
|
3260 |
|
|
/* First provide any missing ._savef* and ._restf* functions. */
|
3261 |
|
|
memcpy (sym, "._savef14", 10);
|
3262 |
|
|
for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
|
3263 |
|
|
{
|
3264 |
|
|
sym[7] = i / 10 + '0';
|
3265 |
|
|
sym[8] = i % 10 + '0';
|
3266 |
|
|
h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
|
3267 |
|
|
if (h != NULL
|
3268 |
|
|
&& h->root.type == bfd_link_hash_undefined)
|
3269 |
|
|
{
|
3270 |
|
|
if (lowest_savef > i)
|
3271 |
|
|
lowest_savef = i;
|
3272 |
|
|
h->root.type = bfd_link_hash_defined;
|
3273 |
|
|
h->root.u.def.section = htab->sfpr;
|
3274 |
|
|
h->root.u.def.value = (i - lowest_savef) * 4;
|
3275 |
|
|
h->type = STT_FUNC;
|
3276 |
|
|
h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
|
3277 |
|
|
_bfd_elf_link_hash_hide_symbol (info, h, info->shared);
|
3278 |
|
|
}
|
3279 |
|
|
}
|
3280 |
|
|
|
3281 |
|
|
memcpy (sym, "._restf14", 10);
|
3282 |
|
|
for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++)
|
3283 |
|
|
{
|
3284 |
|
|
sym[7] = i / 10 + '0';
|
3285 |
|
|
sym[8] = i % 10 + '0';
|
3286 |
|
|
h = elf_link_hash_lookup (&htab->elf, sym, false, false, true);
|
3287 |
|
|
if (h != NULL
|
3288 |
|
|
&& h->root.type == bfd_link_hash_undefined)
|
3289 |
|
|
{
|
3290 |
|
|
if (lowest_restf > i)
|
3291 |
|
|
lowest_restf = i;
|
3292 |
|
|
h->root.type = bfd_link_hash_defined;
|
3293 |
|
|
h->root.u.def.section = htab->sfpr;
|
3294 |
|
|
h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
|
3295 |
|
|
+ (i - lowest_restf) * 4);
|
3296 |
|
|
h->type = STT_FUNC;
|
3297 |
|
|
h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
|
3298 |
|
|
_bfd_elf_link_hash_hide_symbol (info, h, info->shared);
|
3299 |
|
|
}
|
3300 |
|
|
}
|
3301 |
|
|
|
3302 |
|
|
elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info);
|
3303 |
|
|
|
3304 |
|
|
htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4
|
3305 |
|
|
+ (MAX_SAVE_FPR + 2 - lowest_restf) * 4);
|
3306 |
|
|
|
3307 |
|
|
if (htab->sfpr->_raw_size == 0)
|
3308 |
|
|
{
|
3309 |
|
|
if (!htab->have_undefweak)
|
3310 |
|
|
{
|
3311 |
|
|
_bfd_strip_section_from_output (info, htab->sfpr);
|
3312 |
|
|
return true;
|
3313 |
|
|
}
|
3314 |
|
|
|
3315 |
|
|
htab->sfpr->_raw_size = 4;
|
3316 |
|
|
}
|
3317 |
|
|
|
3318 |
|
|
p = (bfd_byte *) bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size);
|
3319 |
|
|
if (p == NULL)
|
3320 |
|
|
return false;
|
3321 |
|
|
htab->sfpr->contents = p;
|
3322 |
|
|
|
3323 |
|
|
for (i = lowest_savef; i <= MAX_SAVE_FPR; i++)
|
3324 |
|
|
{
|
3325 |
|
|
unsigned int fpr = i << 21;
|
3326 |
|
|
unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
|
3327 |
|
|
bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p);
|
3328 |
|
|
p += 4;
|
3329 |
|
|
}
|
3330 |
|
|
if (lowest_savef <= MAX_SAVE_FPR)
|
3331 |
|
|
{
|
3332 |
|
|
bfd_put_32 (htab->elf.dynobj, BLR, p);
|
3333 |
|
|
p += 4;
|
3334 |
|
|
}
|
3335 |
|
|
|
3336 |
|
|
for (i = lowest_restf; i <= MAX_SAVE_FPR; i++)
|
3337 |
|
|
{
|
3338 |
|
|
unsigned int fpr = i << 21;
|
3339 |
|
|
unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8;
|
3340 |
|
|
bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p);
|
3341 |
|
|
p += 4;
|
3342 |
|
|
}
|
3343 |
|
|
if (lowest_restf <= MAX_SAVE_FPR
|
3344 |
|
|
|| htab->sfpr->_raw_size == 4)
|
3345 |
|
|
{
|
3346 |
|
|
bfd_put_32 (htab->elf.dynobj, BLR, p);
|
3347 |
|
|
}
|
3348 |
|
|
|
3349 |
|
|
return true;
|
3350 |
|
|
}
|
3351 |
|
|
|
3352 |
|
|
/* Adjust a symbol defined by a dynamic object and referenced by a
|
3353 |
|
|
regular object. The current definition is in some section of the
|
3354 |
|
|
dynamic object, but we're not including those sections. We have to
|
3355 |
|
|
change the definition to something the rest of the link can
|
3356 |
|
|
understand. */
|
3357 |
|
|
|
3358 |
|
|
static boolean
|
3359 |
|
|
ppc64_elf_adjust_dynamic_symbol (info, h)
|
3360 |
|
|
struct bfd_link_info *info;
|
3361 |
|
|
struct elf_link_hash_entry *h;
|
3362 |
|
|
{
|
3363 |
|
|
struct ppc_link_hash_table *htab;
|
3364 |
|
|
struct ppc_link_hash_entry * eh;
|
3365 |
|
|
struct ppc_dyn_relocs *p;
|
3366 |
|
|
asection *s;
|
3367 |
|
|
unsigned int power_of_two;
|
3368 |
|
|
|
3369 |
|
|
htab = ppc_hash_table (info);
|
3370 |
|
|
|
3371 |
|
|
/* Deal with function syms. */
|
3372 |
|
|
if (h->type == STT_FUNC
|
3373 |
|
|
|| (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
|
3374 |
|
|
{
|
3375 |
|
|
/* Clear procedure linkage table information for any symbol that
|
3376 |
|
|
won't need a .plt entry. */
|
3377 |
|
|
if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor
|
3378 |
|
|
|| h->plt.refcount <= 0
|
3379 |
|
|
|| (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
|
3380 |
|
|
|| (! info->shared
|
3381 |
|
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
|
3382 |
|
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0))
|
3383 |
|
|
{
|
3384 |
|
|
h->plt.offset = (bfd_vma) -1;
|
3385 |
|
|
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
|
3386 |
|
|
}
|
3387 |
|
|
return true;
|
3388 |
|
|
}
|
3389 |
|
|
else
|
3390 |
|
|
h->plt.offset = (bfd_vma) -1;
|
3391 |
|
|
|
3392 |
|
|
/* If this is a weak symbol, and there is a real definition, the
|
3393 |
|
|
processor independent code will have arranged for us to see the
|
3394 |
|
|
real definition first, and we can just use the same value. */
|
3395 |
|
|
if (h->weakdef != NULL)
|
3396 |
|
|
{
|
3397 |
|
|
BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
|
3398 |
|
|
|| h->weakdef->root.type == bfd_link_hash_defweak);
|
3399 |
|
|
h->root.u.def.section = h->weakdef->root.u.def.section;
|
3400 |
|
|
h->root.u.def.value = h->weakdef->root.u.def.value;
|
3401 |
|
|
return true;
|
3402 |
|
|
}
|
3403 |
|
|
|
3404 |
|
|
/* This is a reference to a symbol defined by a dynamic object which
|
3405 |
|
|
is not a function. */
|
3406 |
|
|
|
3407 |
|
|
/* If we are creating a shared library, we must presume that the
|
3408 |
|
|
only references to the symbol are via the global offset table.
|
3409 |
|
|
For such cases we need not do anything here; the relocations will
|
3410 |
|
|
be handled correctly by relocate_section. */
|
3411 |
|
|
if (info->shared)
|
3412 |
|
|
return true;
|
3413 |
|
|
|
3414 |
|
|
/* If there are no references to this symbol that do not use the
|
3415 |
|
|
GOT, we don't need to generate a copy reloc. */
|
3416 |
|
|
if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
|
3417 |
|
|
return true;
|
3418 |
|
|
|
3419 |
|
|
eh = (struct ppc_link_hash_entry *) h;
|
3420 |
|
|
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
3421 |
|
|
{
|
3422 |
|
|
s = p->sec->output_section;
|
3423 |
|
|
if (s != NULL && (s->flags & SEC_READONLY) != 0)
|
3424 |
|
|
break;
|
3425 |
|
|
}
|
3426 |
|
|
|
3427 |
|
|
/* If we didn't find any dynamic relocs in read-only sections, then
|
3428 |
|
|
we'll be keeping the dynamic relocs and avoiding the copy reloc. */
|
3429 |
|
|
if (p == NULL)
|
3430 |
|
|
{
|
3431 |
|
|
h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
|
3432 |
|
|
return true;
|
3433 |
|
|
}
|
3434 |
|
|
|
3435 |
|
|
/* We must allocate the symbol in our .dynbss section, which will
|
3436 |
|
|
become part of the .bss section of the executable. There will be
|
3437 |
|
|
an entry for this symbol in the .dynsym section. The dynamic
|
3438 |
|
|
object will contain position independent code, so all references
|
3439 |
|
|
from the dynamic object to this symbol will go through the global
|
3440 |
|
|
offset table. The dynamic linker will use the .dynsym entry to
|
3441 |
|
|
determine the address it must put in the global offset table, so
|
3442 |
|
|
both the dynamic object and the regular object will refer to the
|
3443 |
|
|
same memory location for the variable. */
|
3444 |
|
|
|
3445 |
|
|
/* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
|
3446 |
|
|
copy the initial value out of the dynamic object and into the
|
3447 |
|
|
runtime process image. We need to remember the offset into the
|
3448 |
|
|
.rela.bss section we are going to use. */
|
3449 |
|
|
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
3450 |
|
|
{
|
3451 |
|
|
htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
|
3452 |
|
|
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
|
3453 |
|
|
}
|
3454 |
|
|
|
3455 |
|
|
/* We need to figure out the alignment required for this symbol. I
|
3456 |
|
|
have no idea how ELF linkers handle this. */
|
3457 |
|
|
power_of_two = bfd_log2 (h->size);
|
3458 |
|
|
if (power_of_two > 4)
|
3459 |
|
|
power_of_two = 4;
|
3460 |
|
|
|
3461 |
|
|
/* Apply the required alignment. */
|
3462 |
|
|
s = htab->sdynbss;
|
3463 |
|
|
s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
|
3464 |
|
|
if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
|
3465 |
|
|
{
|
3466 |
|
|
if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
|
3467 |
|
|
return false;
|
3468 |
|
|
}
|
3469 |
|
|
|
3470 |
|
|
/* Define the symbol as being at this point in the section. */
|
3471 |
|
|
h->root.u.def.section = s;
|
3472 |
|
|
h->root.u.def.value = s->_raw_size;
|
3473 |
|
|
|
3474 |
|
|
/* Increment the section size to make room for the symbol. */
|
3475 |
|
|
s->_raw_size += h->size;
|
3476 |
|
|
|
3477 |
|
|
return true;
|
3478 |
|
|
}
|
3479 |
|
|
|
3480 |
|
|
/* If given a function descriptor symbol, hide both the function code
|
3481 |
|
|
sym and the descriptor. */
|
3482 |
|
|
static void
|
3483 |
|
|
ppc64_elf_hide_symbol (info, h, force_local)
|
3484 |
|
|
struct bfd_link_info *info;
|
3485 |
|
|
struct elf_link_hash_entry *h;
|
3486 |
|
|
boolean force_local;
|
3487 |
|
|
{
|
3488 |
|
|
_bfd_elf_link_hash_hide_symbol (info, h, force_local);
|
3489 |
|
|
|
3490 |
|
|
if (((struct ppc_link_hash_entry *) h)->is_func_descriptor)
|
3491 |
|
|
{
|
3492 |
|
|
struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh;
|
3493 |
|
|
|
3494 |
|
|
if (fh == NULL)
|
3495 |
|
|
{
|
3496 |
|
|
const char *p, *q;
|
3497 |
|
|
struct ppc_link_hash_table *htab;
|
3498 |
|
|
char save;
|
3499 |
|
|
|
3500 |
|
|
/* We aren't supposed to use alloca in BFD because on
|
3501 |
|
|
systems which do not have alloca the version in libiberty
|
3502 |
|
|
calls xmalloc, which might cause the program to crash
|
3503 |
|
|
when it runs out of memory. This function doesn't have a
|
3504 |
|
|
return status, so there's no way to gracefully return an
|
3505 |
|
|
error. So cheat. We know that string[-1] can be safely
|
3506 |
|
|
dereferenced; It's either a string in an ELF string
|
3507 |
|
|
table, or allocated in an objalloc structure. */
|
3508 |
|
|
|
3509 |
|
|
p = h->root.root.string - 1;
|
3510 |
|
|
save = *p;
|
3511 |
|
|
*(char *) p = '.';
|
3512 |
|
|
htab = ppc_hash_table (info);
|
3513 |
|
|
fh = elf_link_hash_lookup (&htab->elf, p, false, false, false);
|
3514 |
|
|
*(char *) p = save;
|
3515 |
|
|
|
3516 |
|
|
/* Unfortunately, if it so happens that the string we were
|
3517 |
|
|
looking for was allocated immediately before this string,
|
3518 |
|
|
then we overwrote the string terminator. That's the only
|
3519 |
|
|
reason the lookup should fail. */
|
3520 |
|
|
if (fh == NULL)
|
3521 |
|
|
{
|
3522 |
|
|
q = h->root.root.string + strlen (h->root.root.string);
|
3523 |
|
|
while (q >= h->root.root.string && *q == *p)
|
3524 |
|
|
--q, --p;
|
3525 |
|
|
if (q < h->root.root.string && *p == '.')
|
3526 |
|
|
fh = elf_link_hash_lookup (&htab->elf, p, false, false, false);
|
3527 |
|
|
}
|
3528 |
|
|
if (fh != NULL)
|
3529 |
|
|
{
|
3530 |
|
|
((struct ppc_link_hash_entry *) h)->oh = fh;
|
3531 |
|
|
((struct ppc_link_hash_entry *) fh)->oh = h;
|
3532 |
|
|
}
|
3533 |
|
|
}
|
3534 |
|
|
if (fh != NULL)
|
3535 |
|
|
_bfd_elf_link_hash_hide_symbol (info, fh, force_local);
|
3536 |
|
|
}
|
3537 |
|
|
}
|
3538 |
|
|
|
3539 |
|
|
static boolean
|
3540 |
|
|
edit_opd (obfd, info)
|
3541 |
|
|
bfd *obfd;
|
3542 |
|
|
struct bfd_link_info *info;
|
3543 |
|
|
{
|
3544 |
|
|
bfd *ibfd;
|
3545 |
|
|
unsigned int bfd_indx;
|
3546 |
|
|
|
3547 |
|
|
for (bfd_indx = 0, ibfd = info->input_bfds;
|
3548 |
|
|
ibfd != NULL;
|
3549 |
|
|
ibfd = ibfd->link_next, bfd_indx++)
|
3550 |
|
|
{
|
3551 |
|
|
asection *sec;
|
3552 |
|
|
Elf_Internal_Rela *relstart, *rel, *relend;
|
3553 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
3554 |
|
|
Elf_Internal_Sym *local_syms;
|
3555 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
3556 |
|
|
bfd_vma offset;
|
3557 |
|
|
long *adjust;
|
3558 |
|
|
boolean need_edit;
|
3559 |
|
|
|
3560 |
|
|
sec = bfd_get_section_by_name (ibfd, ".opd");
|
3561 |
|
|
if (sec == NULL)
|
3562 |
|
|
continue;
|
3563 |
|
|
|
3564 |
|
|
adjust = (long *) elf_section_data (sec)->tdata;
|
3565 |
|
|
BFD_ASSERT (adjust != NULL);
|
3566 |
|
|
memset (adjust, 0, (size_t) sec->_raw_size * sizeof (long) / 24);
|
3567 |
|
|
|
3568 |
|
|
if (sec->output_section == bfd_abs_section_ptr)
|
3569 |
|
|
continue;
|
3570 |
|
|
|
3571 |
|
|
/* Look through the section relocs. */
|
3572 |
|
|
if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0)
|
3573 |
|
|
continue;
|
3574 |
|
|
|
3575 |
|
|
local_syms = NULL;
|
3576 |
|
|
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
|
3577 |
|
|
sym_hashes = elf_sym_hashes (ibfd);
|
3578 |
|
|
|
3579 |
|
|
/* Read the relocations. */
|
3580 |
|
|
relstart = _bfd_elf64_link_read_relocs (obfd, sec, (PTR) NULL,
|
3581 |
|
|
(Elf_Internal_Rela *) NULL,
|
3582 |
|
|
info->keep_memory);
|
3583 |
|
|
if (relstart == NULL)
|
3584 |
|
|
return false;
|
3585 |
|
|
|
3586 |
|
|
/* First run through the relocs to check they are sane, and to
|
3587 |
|
|
determine whether we need to edit this opd section. */
|
3588 |
|
|
need_edit = false;
|
3589 |
|
|
offset = 0;
|
3590 |
|
|
relend = relstart + sec->reloc_count;
|
3591 |
|
|
for (rel = relstart; rel < relend; rel++)
|
3592 |
|
|
{
|
3593 |
|
|
enum elf_ppc_reloc_type r_type;
|
3594 |
|
|
unsigned long r_symndx;
|
3595 |
|
|
asection *sym_sec;
|
3596 |
|
|
struct elf_link_hash_entry *h;
|
3597 |
|
|
Elf_Internal_Sym *sym;
|
3598 |
|
|
|
3599 |
|
|
/* .opd contains a regular array of 24 byte entries. We're
|
3600 |
|
|
only interested in the reloc pointing to a function entry
|
3601 |
|
|
point. */
|
3602 |
|
|
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
|
3603 |
|
|
if (r_type == R_PPC64_TOC)
|
3604 |
|
|
continue;
|
3605 |
|
|
|
3606 |
|
|
if (r_type != R_PPC64_ADDR64)
|
3607 |
|
|
{
|
3608 |
|
|
(*_bfd_error_handler)
|
3609 |
|
|
(_("%s: unexpected reloc type %u in .opd section"),
|
3610 |
|
|
bfd_archive_filename (ibfd), r_type);
|
3611 |
|
|
need_edit = false;
|
3612 |
|
|
break;
|
3613 |
|
|
}
|
3614 |
|
|
|
3615 |
|
|
if (rel + 1 >= relend)
|
3616 |
|
|
continue;
|
3617 |
|
|
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info);
|
3618 |
|
|
if (r_type != R_PPC64_TOC)
|
3619 |
|
|
continue;
|
3620 |
|
|
|
3621 |
|
|
if (rel->r_offset != offset)
|
3622 |
|
|
{
|
3623 |
|
|
/* If someone messes with .opd alignment then after a
|
3624 |
|
|
"ld -r" we might have padding in the middle of .opd.
|
3625 |
|
|
Also, there's nothing to prevent someone putting
|
3626 |
|
|
something silly in .opd with the assembler. No .opd
|
3627 |
|
|
optimization for them! */
|
3628 |
|
|
(*_bfd_error_handler)
|
3629 |
|
|
(_("%s: .opd is not a regular array of opd entries"),
|
3630 |
|
|
bfd_archive_filename (ibfd));
|
3631 |
|
|
need_edit = false;
|
3632 |
|
|
break;
|
3633 |
|
|
}
|
3634 |
|
|
|
3635 |
|
|
r_symndx = ELF64_R_SYM (rel->r_info);
|
3636 |
|
|
sym_sec = NULL;
|
3637 |
|
|
h = NULL;
|
3638 |
|
|
sym = NULL;
|
3639 |
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
3640 |
|
|
{
|
3641 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
3642 |
|
|
while (h->root.type == bfd_link_hash_indirect
|
3643 |
|
|
|| h->root.type == bfd_link_hash_warning)
|
3644 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
3645 |
|
|
if (h->root.type == bfd_link_hash_defined
|
3646 |
|
|
|| h->root.type == bfd_link_hash_defweak)
|
3647 |
|
|
sym_sec = h->root.u.def.section;
|
3648 |
|
|
}
|
3649 |
|
|
else
|
3650 |
|
|
{
|
3651 |
|
|
if (local_syms == NULL)
|
3652 |
|
|
{
|
3653 |
|
|
local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
|
3654 |
|
|
if (local_syms == NULL)
|
3655 |
|
|
local_syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
|
3656 |
|
|
symtab_hdr->sh_info, 0,
|
3657 |
|
|
NULL, NULL, NULL);
|
3658 |
|
|
if (local_syms == NULL)
|
3659 |
|
|
goto error_free_rel;
|
3660 |
|
|
}
|
3661 |
|
|
sym = local_syms + r_symndx;
|
3662 |
|
|
if ((sym->st_shndx != SHN_UNDEF
|
3663 |
|
|
&& sym->st_shndx < SHN_LORESERVE)
|
3664 |
|
|
|| sym->st_shndx > SHN_HIRESERVE)
|
3665 |
|
|
sym_sec = bfd_section_from_elf_index (ibfd, sym->st_shndx);
|
3666 |
|
|
}
|
3667 |
|
|
|
3668 |
|
|
if (sym_sec == NULL || sym_sec->owner == NULL)
|
3669 |
|
|
{
|
3670 |
|
|
(*_bfd_error_handler)
|
3671 |
|
|
(_("%s: undefined sym `%s' in .opd section"),
|
3672 |
|
|
bfd_archive_filename (ibfd),
|
3673 |
|
|
h != NULL ? h->root.root.string : "<local symbol>");
|
3674 |
|
|
need_edit = false;
|
3675 |
|
|
break;
|
3676 |
|
|
}
|
3677 |
|
|
|
3678 |
|
|
if (sym_sec->output_section == bfd_abs_section_ptr)
|
3679 |
|
|
{
|
3680 |
|
|
/* OK, we've found a function that's excluded from the
|
3681 |
|
|
link. */
|
3682 |
|
|
need_edit = true;
|
3683 |
|
|
}
|
3684 |
|
|
|
3685 |
|
|
offset += 24;
|
3686 |
|
|
}
|
3687 |
|
|
|
3688 |
|
|
if (need_edit)
|
3689 |
|
|
{
|
3690 |
|
|
Elf_Internal_Rela *write_rel;
|
3691 |
|
|
bfd_byte *rptr, *wptr;
|
3692 |
|
|
boolean skip;
|
3693 |
|
|
|
3694 |
|
|
/* This seems a waste of time as input .opd sections are all
|
3695 |
|
|
zeros as generated by gcc, but I suppose there's no reason
|
3696 |
|
|
this will always be so. We might start putting something in
|
3697 |
|
|
the third word of .opd entries. */
|
3698 |
|
|
if ((sec->flags & SEC_IN_MEMORY) == 0)
|
3699 |
|
|
{
|
3700 |
|
|
bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size);
|
3701 |
|
|
if (loc == NULL
|
3702 |
|
|
|| !bfd_get_section_contents (ibfd, sec, loc, (bfd_vma) 0,
|
3703 |
|
|
sec->_raw_size))
|
3704 |
|
|
{
|
3705 |
|
|
if (local_syms != NULL
|
3706 |
|
|
&& symtab_hdr->contents != (unsigned char *) local_syms)
|
3707 |
|
|
free (local_syms);
|
3708 |
|
|
error_free_rel:
|
3709 |
|
|
if (elf_section_data (sec)->relocs != relstart)
|
3710 |
|
|
free (relstart);
|
3711 |
|
|
return false;
|
3712 |
|
|
}
|
3713 |
|
|
sec->contents = loc;
|
3714 |
|
|
sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS);
|
3715 |
|
|
}
|
3716 |
|
|
|
3717 |
|
|
elf_section_data (sec)->relocs = relstart;
|
3718 |
|
|
|
3719 |
|
|
wptr = sec->contents;
|
3720 |
|
|
rptr = sec->contents;
|
3721 |
|
|
write_rel = relstart;
|
3722 |
|
|
skip = false;
|
3723 |
|
|
offset = 0;
|
3724 |
|
|
for (rel = relstart; rel < relend; rel++)
|
3725 |
|
|
{
|
3726 |
|
|
if (rel->r_offset == offset)
|
3727 |
|
|
{
|
3728 |
|
|
unsigned long r_symndx;
|
3729 |
|
|
asection *sym_sec;
|
3730 |
|
|
struct elf_link_hash_entry *h;
|
3731 |
|
|
Elf_Internal_Sym *sym;
|
3732 |
|
|
|
3733 |
|
|
r_symndx = ELF64_R_SYM (rel->r_info);
|
3734 |
|
|
sym_sec = NULL;
|
3735 |
|
|
h = NULL;
|
3736 |
|
|
sym = NULL;
|
3737 |
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
3738 |
|
|
{
|
3739 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
3740 |
|
|
while (h->root.type == bfd_link_hash_indirect
|
3741 |
|
|
|| h->root.type == bfd_link_hash_warning)
|
3742 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
3743 |
|
|
if (h->root.type == bfd_link_hash_defined
|
3744 |
|
|
|| h->root.type == bfd_link_hash_defweak)
|
3745 |
|
|
sym_sec = h->root.u.def.section;
|
3746 |
|
|
}
|
3747 |
|
|
else
|
3748 |
|
|
{
|
3749 |
|
|
sym = local_syms + r_symndx;
|
3750 |
|
|
if ((sym->st_shndx != SHN_UNDEF
|
3751 |
|
|
&& sym->st_shndx < SHN_LORESERVE)
|
3752 |
|
|
|| sym->st_shndx > SHN_HIRESERVE)
|
3753 |
|
|
sym_sec = bfd_section_from_elf_index (ibfd,
|
3754 |
|
|
sym->st_shndx);
|
3755 |
|
|
}
|
3756 |
|
|
|
3757 |
|
|
skip = sym_sec->output_section == bfd_abs_section_ptr;
|
3758 |
|
|
if (skip)
|
3759 |
|
|
{
|
3760 |
|
|
if (h != NULL)
|
3761 |
|
|
{
|
3762 |
|
|
/* Arrange for the function descriptor sym
|
3763 |
|
|
to be dropped. */
|
3764 |
|
|
struct elf_link_hash_entry *fdh;
|
3765 |
|
|
struct ppc_link_hash_entry *fh;
|
3766 |
|
|
|
3767 |
|
|
fh = (struct ppc_link_hash_entry *) h;
|
3768 |
|
|
BFD_ASSERT (fh->is_func);
|
3769 |
|
|
fdh = fh->oh;
|
3770 |
|
|
fdh->root.u.def.value = 0;
|
3771 |
|
|
fdh->root.u.def.section = sym_sec;
|
3772 |
|
|
}
|
3773 |
|
|
}
|
3774 |
|
|
else
|
3775 |
|
|
{
|
3776 |
|
|
/* We'll be keeping this opd entry. */
|
3777 |
|
|
|
3778 |
|
|
if (h != NULL)
|
3779 |
|
|
{
|
3780 |
|
|
/* Redefine the function descriptor symbol
|
3781 |
|
|
to this location in the opd section.
|
3782 |
|
|
We've checked above that opd relocs are
|
3783 |
|
|
ordered. */
|
3784 |
|
|
struct elf_link_hash_entry *fdh;
|
3785 |
|
|
struct ppc_link_hash_entry *fh;
|
3786 |
|
|
|
3787 |
|
|
fh = (struct ppc_link_hash_entry *) h;
|
3788 |
|
|
BFD_ASSERT (fh->is_func);
|
3789 |
|
|
fdh = fh->oh;
|
3790 |
|
|
fdh->root.u.def.value = wptr - sec->contents;
|
3791 |
|
|
}
|
3792 |
|
|
else
|
3793 |
|
|
{
|
3794 |
|
|
/* Local syms are a bit tricky. We could
|
3795 |
|
|
tweak them as they can be cached, but
|
3796 |
|
|
we'd need to look through the local syms
|
3797 |
|
|
for the function descriptor sym which we
|
3798 |
|
|
don't have at the moment. So keep an
|
3799 |
|
|
array of adjustments. */
|
3800 |
|
|
adjust[(rel->r_offset + wptr - rptr) / 24]
|
3801 |
|
|
= wptr - rptr;
|
3802 |
|
|
}
|
3803 |
|
|
|
3804 |
|
|
if (wptr != rptr)
|
3805 |
|
|
memcpy (wptr, rptr, 24);
|
3806 |
|
|
wptr += 24;
|
3807 |
|
|
}
|
3808 |
|
|
rptr += 24;
|
3809 |
|
|
offset += 24;
|
3810 |
|
|
}
|
3811 |
|
|
|
3812 |
|
|
/* We need to adjust any reloc offsets to point to the
|
3813 |
|
|
new opd entries. While we're at it, we may as well
|
3814 |
|
|
remove redundant relocs. */
|
3815 |
|
|
if (!skip)
|
3816 |
|
|
{
|
3817 |
|
|
rel->r_offset += wptr - rptr;
|
3818 |
|
|
if (write_rel != rel)
|
3819 |
|
|
memcpy (write_rel, rel, sizeof (*rel));
|
3820 |
|
|
++write_rel;
|
3821 |
|
|
}
|
3822 |
|
|
}
|
3823 |
|
|
|
3824 |
|
|
sec->_cooked_size = wptr - sec->contents;
|
3825 |
|
|
sec->reloc_count = write_rel - relstart;
|
3826 |
|
|
}
|
3827 |
|
|
else if (elf_section_data (sec)->relocs != relstart)
|
3828 |
|
|
free (relstart);
|
3829 |
|
|
|
3830 |
|
|
if (local_syms != NULL
|
3831 |
|
|
&& symtab_hdr->contents != (unsigned char *) local_syms)
|
3832 |
|
|
{
|
3833 |
|
|
if (!info->keep_memory)
|
3834 |
|
|
free (local_syms);
|
3835 |
|
|
else
|
3836 |
|
|
symtab_hdr->contents = (unsigned char *) local_syms;
|
3837 |
|
|
}
|
3838 |
|
|
}
|
3839 |
|
|
|
3840 |
|
|
return true;
|
3841 |
|
|
}
|
3842 |
|
|
|
3843 |
|
|
/* This is the condition under which ppc64_elf_finish_dynamic_symbol
|
3844 |
|
|
will be called from elflink.h. If elflink.h doesn't call our
|
3845 |
|
|
finish_dynamic_symbol routine, we'll need to do something about
|
3846 |
|
|
initializing any .plt and .got entries in ppc64_elf_relocate_section. */
|
3847 |
|
|
#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
|
3848 |
|
|
((DYN) \
|
3849 |
|
|
&& ((INFO)->shared \
|
3850 |
|
|
|| ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
|
3851 |
|
|
&& ((H)->dynindx != -1 \
|
3852 |
|
|
|| ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
|
3853 |
|
|
|
3854 |
|
|
/* Allocate space in .plt, .got and associated reloc sections for
|
3855 |
|
|
dynamic relocs. */
|
3856 |
|
|
|
3857 |
|
|
static boolean
|
3858 |
|
|
allocate_dynrelocs (h, inf)
|
3859 |
|
|
struct elf_link_hash_entry *h;
|
3860 |
|
|
PTR inf;
|
3861 |
|
|
{
|
3862 |
|
|
struct bfd_link_info *info;
|
3863 |
|
|
struct ppc_link_hash_table *htab;
|
3864 |
|
|
asection *s;
|
3865 |
|
|
struct ppc_link_hash_entry *eh;
|
3866 |
|
|
struct ppc_dyn_relocs *p;
|
3867 |
|
|
|
3868 |
|
|
if (h->root.type == bfd_link_hash_indirect)
|
3869 |
|
|
return true;
|
3870 |
|
|
|
3871 |
|
|
if (h->root.type == bfd_link_hash_warning)
|
3872 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
3873 |
|
|
|
3874 |
|
|
info = (struct bfd_link_info *) inf;
|
3875 |
|
|
htab = ppc_hash_table (info);
|
3876 |
|
|
|
3877 |
|
|
if (htab->elf.dynamic_sections_created
|
3878 |
|
|
&& h->plt.refcount > 0
|
3879 |
|
|
&& h->dynindx != -1)
|
3880 |
|
|
{
|
3881 |
|
|
BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor);
|
3882 |
|
|
|
3883 |
|
|
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
|
3884 |
|
|
{
|
3885 |
|
|
/* If this is the first .plt entry, make room for the special
|
3886 |
|
|
first entry. */
|
3887 |
|
|
s = htab->splt;
|
3888 |
|
|
if (s->_raw_size == 0)
|
3889 |
|
|
s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
|
3890 |
|
|
|
3891 |
|
|
h->plt.offset = s->_raw_size;
|
3892 |
|
|
|
3893 |
|
|
/* Make room for this entry. */
|
3894 |
|
|
s->_raw_size += PLT_ENTRY_SIZE;
|
3895 |
|
|
|
3896 |
|
|
/* Make room for the .glink code. */
|
3897 |
|
|
s = htab->sglink;
|
3898 |
|
|
if (s->_raw_size == 0)
|
3899 |
|
|
s->_raw_size += GLINK_CALL_STUB_SIZE;
|
3900 |
|
|
/* We need bigger stubs past index 32767. */
|
3901 |
|
|
if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4)
|
3902 |
|
|
s->_raw_size += 4;
|
3903 |
|
|
s->_raw_size += 2*4;
|
3904 |
|
|
|
3905 |
|
|
/* We also need to make an entry in the .rela.plt section. */
|
3906 |
|
|
s = htab->srelplt;
|
3907 |
|
|
s->_raw_size += sizeof (Elf64_External_Rela);
|
3908 |
|
|
}
|
3909 |
|
|
else
|
3910 |
|
|
{
|
3911 |
|
|
h->plt.offset = (bfd_vma) -1;
|
3912 |
|
|
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
|
3913 |
|
|
}
|
3914 |
|
|
}
|
3915 |
|
|
else
|
3916 |
|
|
{
|
3917 |
|
|
h->plt.offset = (bfd_vma) -1;
|
3918 |
|
|
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
|
3919 |
|
|
}
|
3920 |
|
|
|
3921 |
|
|
if (h->got.refcount > 0)
|
3922 |
|
|
{
|
3923 |
|
|
boolean dyn;
|
3924 |
|
|
|
3925 |
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
3926 |
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
3927 |
|
|
if (h->dynindx == -1
|
3928 |
|
|
&& (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
|
3929 |
|
|
{
|
3930 |
|
|
if (! bfd_elf64_link_record_dynamic_symbol (info, h))
|
3931 |
|
|
return false;
|
3932 |
|
|
}
|
3933 |
|
|
|
3934 |
|
|
s = htab->sgot;
|
3935 |
|
|
h->got.offset = s->_raw_size;
|
3936 |
|
|
s->_raw_size += 8;
|
3937 |
|
|
dyn = htab->elf.dynamic_sections_created;
|
3938 |
|
|
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
|
3939 |
|
|
htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
|
3940 |
|
|
}
|
3941 |
|
|
else
|
3942 |
|
|
h->got.offset = (bfd_vma) -1;
|
3943 |
|
|
|
3944 |
|
|
eh = (struct ppc_link_hash_entry *) h;
|
3945 |
|
|
if (eh->dyn_relocs == NULL)
|
3946 |
|
|
return true;
|
3947 |
|
|
|
3948 |
|
|
/* In the shared -Bsymbolic case, discard space allocated for
|
3949 |
|
|
dynamic pc-relative relocs against symbols which turn out to be
|
3950 |
|
|
defined in regular objects. For the normal shared case, discard
|
3951 |
|
|
space for relocs that have become local due to symbol visibility
|
3952 |
|
|
changes. */
|
3953 |
|
|
|
3954 |
|
|
if (info->shared)
|
3955 |
|
|
{
|
3956 |
|
|
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
|
3957 |
|
|
&& ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
|
3958 |
|
|
|| info->symbolic))
|
3959 |
|
|
{
|
3960 |
|
|
struct ppc_dyn_relocs **pp;
|
3961 |
|
|
|
3962 |
|
|
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
|
3963 |
|
|
{
|
3964 |
|
|
p->count -= p->pc_count;
|
3965 |
|
|
p->pc_count = 0;
|
3966 |
|
|
if (p->count == 0)
|
3967 |
|
|
*pp = p->next;
|
3968 |
|
|
else
|
3969 |
|
|
pp = &p->next;
|
3970 |
|
|
}
|
3971 |
|
|
}
|
3972 |
|
|
}
|
3973 |
|
|
else
|
3974 |
|
|
{
|
3975 |
|
|
/* For the non-shared case, discard space for relocs against
|
3976 |
|
|
symbols which turn out to need copy relocs or are not
|
3977 |
|
|
dynamic. */
|
3978 |
|
|
|
3979 |
|
|
if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
|
3980 |
|
|
&& (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
3981 |
|
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
3982 |
|
|
|| (htab->elf.dynamic_sections_created
|
3983 |
|
|
&& (h->root.type == bfd_link_hash_undefweak
|
3984 |
|
|
|| h->root.type == bfd_link_hash_undefined))))
|
3985 |
|
|
{
|
3986 |
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
3987 |
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
3988 |
|
|
if (h->dynindx == -1
|
3989 |
|
|
&& (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
|
3990 |
|
|
{
|
3991 |
|
|
if (! bfd_elf64_link_record_dynamic_symbol (info, h))
|
3992 |
|
|
return false;
|
3993 |
|
|
}
|
3994 |
|
|
|
3995 |
|
|
/* If that succeeded, we know we'll be keeping all the
|
3996 |
|
|
relocs. */
|
3997 |
|
|
if (h->dynindx != -1)
|
3998 |
|
|
goto keep;
|
3999 |
|
|
}
|
4000 |
|
|
|
4001 |
|
|
eh->dyn_relocs = NULL;
|
4002 |
|
|
|
4003 |
|
|
keep: ;
|
4004 |
|
|
}
|
4005 |
|
|
|
4006 |
|
|
/* Finally, allocate space. */
|
4007 |
|
|
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
4008 |
|
|
{
|
4009 |
|
|
asection *sreloc = elf_section_data (p->sec)->sreloc;
|
4010 |
|
|
sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
|
4011 |
|
|
}
|
4012 |
|
|
|
4013 |
|
|
return true;
|
4014 |
|
|
}
|
4015 |
|
|
|
4016 |
|
|
/* Find any dynamic relocs that apply to read-only sections. */
|
4017 |
|
|
|
4018 |
|
|
static boolean
|
4019 |
|
|
readonly_dynrelocs (h, inf)
|
4020 |
|
|
struct elf_link_hash_entry *h;
|
4021 |
|
|
PTR inf;
|
4022 |
|
|
{
|
4023 |
|
|
struct ppc_link_hash_entry *eh;
|
4024 |
|
|
struct ppc_dyn_relocs *p;
|
4025 |
|
|
|
4026 |
|
|
if (h->root.type == bfd_link_hash_warning)
|
4027 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
4028 |
|
|
|
4029 |
|
|
eh = (struct ppc_link_hash_entry *) h;
|
4030 |
|
|
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
4031 |
|
|
{
|
4032 |
|
|
asection *s = p->sec->output_section;
|
4033 |
|
|
|
4034 |
|
|
if (s != NULL && (s->flags & SEC_READONLY) != 0)
|
4035 |
|
|
{
|
4036 |
|
|
struct bfd_link_info *info = (struct bfd_link_info *) inf;
|
4037 |
|
|
|
4038 |
|
|
info->flags |= DF_TEXTREL;
|
4039 |
|
|
|
4040 |
|
|
/* Not an error, just cut short the traversal. */
|
4041 |
|
|
return false;
|
4042 |
|
|
}
|
4043 |
|
|
}
|
4044 |
|
|
return true;
|
4045 |
|
|
}
|
4046 |
|
|
|
4047 |
|
|
/* Set the sizes of the dynamic sections. */
|
4048 |
|
|
|
4049 |
|
|
static boolean
|
4050 |
|
|
ppc64_elf_size_dynamic_sections (output_bfd, info)
|
4051 |
|
|
bfd *output_bfd ATTRIBUTE_UNUSED;
|
4052 |
|
|
struct bfd_link_info *info;
|
4053 |
|
|
{
|
4054 |
|
|
struct ppc_link_hash_table *htab;
|
4055 |
|
|
bfd *dynobj;
|
4056 |
|
|
asection *s;
|
4057 |
|
|
boolean relocs;
|
4058 |
|
|
bfd *ibfd;
|
4059 |
|
|
|
4060 |
|
|
htab = ppc_hash_table (info);
|
4061 |
|
|
dynobj = htab->elf.dynobj;
|
4062 |
|
|
if (dynobj == NULL)
|
4063 |
|
|
abort ();
|
4064 |
|
|
|
4065 |
|
|
if (htab->elf.dynamic_sections_created)
|
4066 |
|
|
{
|
4067 |
|
|
/* Set the contents of the .interp section to the interpreter. */
|
4068 |
|
|
if (! info->shared)
|
4069 |
|
|
{
|
4070 |
|
|
s = bfd_get_section_by_name (dynobj, ".interp");
|
4071 |
|
|
if (s == NULL)
|
4072 |
|
|
abort ();
|
4073 |
|
|
s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
|
4074 |
|
|
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
4075 |
|
|
}
|
4076 |
|
|
}
|
4077 |
|
|
|
4078 |
|
|
/* Set up .got offsets for local syms, and space for local dynamic
|
4079 |
|
|
relocs. */
|
4080 |
|
|
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
|
4081 |
|
|
{
|
4082 |
|
|
bfd_signed_vma *local_got;
|
4083 |
|
|
bfd_signed_vma *end_local_got;
|
4084 |
|
|
bfd_size_type locsymcount;
|
4085 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
4086 |
|
|
asection *srel;
|
4087 |
|
|
|
4088 |
|
|
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
|
4089 |
|
|
continue;
|
4090 |
|
|
|
4091 |
|
|
for (s = ibfd->sections; s != NULL; s = s->next)
|
4092 |
|
|
{
|
4093 |
|
|
struct ppc_dyn_relocs *p;
|
4094 |
|
|
|
4095 |
|
|
for (p = *((struct ppc_dyn_relocs **)
|
4096 |
|
|
&elf_section_data (s)->local_dynrel);
|
4097 |
|
|
p != NULL;
|
4098 |
|
|
p = p->next)
|
4099 |
|
|
{
|
4100 |
|
|
if (!bfd_is_abs_section (p->sec)
|
4101 |
|
|
&& bfd_is_abs_section (p->sec->output_section))
|
4102 |
|
|
{
|
4103 |
|
|
/* Input section has been discarded, either because
|
4104 |
|
|
it is a copy of a linkonce section or due to
|
4105 |
|
|
linker script /DISCARD/, so we'll be discarding
|
4106 |
|
|
the relocs too. */
|
4107 |
|
|
}
|
4108 |
|
|
else if (p->count != 0)
|
4109 |
|
|
{
|
4110 |
|
|
srel = elf_section_data (p->sec)->sreloc;
|
4111 |
|
|
srel->_raw_size += p->count * sizeof (Elf64_External_Rela);
|
4112 |
|
|
if ((p->sec->output_section->flags & SEC_READONLY) != 0)
|
4113 |
|
|
info->flags |= DF_TEXTREL;
|
4114 |
|
|
}
|
4115 |
|
|
}
|
4116 |
|
|
}
|
4117 |
|
|
|
4118 |
|
|
local_got = elf_local_got_refcounts (ibfd);
|
4119 |
|
|
if (!local_got)
|
4120 |
|
|
continue;
|
4121 |
|
|
|
4122 |
|
|
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
|
4123 |
|
|
locsymcount = symtab_hdr->sh_info;
|
4124 |
|
|
end_local_got = local_got + locsymcount;
|
4125 |
|
|
s = htab->sgot;
|
4126 |
|
|
srel = htab->srelgot;
|
4127 |
|
|
for (; local_got < end_local_got; ++local_got)
|
4128 |
|
|
{
|
4129 |
|
|
if (*local_got > 0)
|
4130 |
|
|
{
|
4131 |
|
|
*local_got = s->_raw_size;
|
4132 |
|
|
s->_raw_size += 8;
|
4133 |
|
|
if (info->shared)
|
4134 |
|
|
srel->_raw_size += sizeof (Elf64_External_Rela);
|
4135 |
|
|
}
|
4136 |
|
|
else
|
4137 |
|
|
*local_got = (bfd_vma) -1;
|
4138 |
|
|
}
|
4139 |
|
|
}
|
4140 |
|
|
|
4141 |
|
|
if (!edit_opd (output_bfd, info))
|
4142 |
|
|
return false;
|
4143 |
|
|
|
4144 |
|
|
/* Allocate global sym .plt and .got entries, and space for global
|
4145 |
|
|
sym dynamic relocs. */
|
4146 |
|
|
elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
|
4147 |
|
|
|
4148 |
|
|
/* We now have determined the sizes of the various dynamic sections.
|
4149 |
|
|
Allocate memory for them. */
|
4150 |
|
|
relocs = false;
|
4151 |
|
|
for (s = dynobj->sections; s != NULL; s = s->next)
|
4152 |
|
|
{
|
4153 |
|
|
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
4154 |
|
|
continue;
|
4155 |
|
|
|
4156 |
|
|
if (s == htab->sbrlt || s == htab->srelbrlt)
|
4157 |
|
|
/* These haven't been allocated yet; don't strip. */
|
4158 |
|
|
continue;
|
4159 |
|
|
else if (s == htab->splt
|
4160 |
|
|
|| s == htab->sgot
|
4161 |
|
|
|| s == htab->sglink)
|
4162 |
|
|
{
|
4163 |
|
|
/* Strip this section if we don't need it; see the
|
4164 |
|
|
comment below. */
|
4165 |
|
|
}
|
4166 |
|
|
else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
|
4167 |
|
|
{
|
4168 |
|
|
if (s->_raw_size == 0)
|
4169 |
|
|
{
|
4170 |
|
|
/* If we don't need this section, strip it from the
|
4171 |
|
|
output file. This is mostly to handle .rela.bss and
|
4172 |
|
|
.rela.plt. We must create both sections in
|
4173 |
|
|
create_dynamic_sections, because they must be created
|
4174 |
|
|
before the linker maps input sections to output
|
4175 |
|
|
sections. The linker does that before
|
4176 |
|
|
adjust_dynamic_symbol is called, and it is that
|
4177 |
|
|
function which decides whether anything needs to go
|
4178 |
|
|
into these sections. */
|
4179 |
|
|
}
|
4180 |
|
|
else
|
4181 |
|
|
{
|
4182 |
|
|
if (s != htab->srelplt)
|
4183 |
|
|
relocs = true;
|
4184 |
|
|
|
4185 |
|
|
/* We use the reloc_count field as a counter if we need
|
4186 |
|
|
to copy relocs into the output file. */
|
4187 |
|
|
s->reloc_count = 0;
|
4188 |
|
|
}
|
4189 |
|
|
}
|
4190 |
|
|
else
|
4191 |
|
|
{
|
4192 |
|
|
/* It's not one of our sections, so don't allocate space. */
|
4193 |
|
|
continue;
|
4194 |
|
|
}
|
4195 |
|
|
|
4196 |
|
|
if (s->_raw_size == 0)
|
4197 |
|
|
{
|
4198 |
|
|
_bfd_strip_section_from_output (info, s);
|
4199 |
|
|
continue;
|
4200 |
|
|
}
|
4201 |
|
|
|
4202 |
|
|
/* .plt is in the bss section. We don't initialise it. */
|
4203 |
|
|
if ((s->flags & SEC_LOAD) == 0)
|
4204 |
|
|
continue;
|
4205 |
|
|
|
4206 |
|
|
/* Allocate memory for the section contents. We use bfd_zalloc
|
4207 |
|
|
here in case unused entries are not reclaimed before the
|
4208 |
|
|
section's contents are written out. This should not happen,
|
4209 |
|
|
but this way if it does, we get a R_PPC64_NONE reloc instead
|
4210 |
|
|
of garbage. */
|
4211 |
|
|
s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
|
4212 |
|
|
if (s->contents == NULL)
|
4213 |
|
|
return false;
|
4214 |
|
|
}
|
4215 |
|
|
|
4216 |
|
|
if (htab->elf.dynamic_sections_created)
|
4217 |
|
|
{
|
4218 |
|
|
/* Add some entries to the .dynamic section. We fill in the
|
4219 |
|
|
values later, in ppc64_elf_finish_dynamic_sections, but we
|
4220 |
|
|
must add the entries now so that we get the correct size for
|
4221 |
|
|
the .dynamic section. The DT_DEBUG entry is filled in by the
|
4222 |
|
|
dynamic linker and used by the debugger. */
|
4223 |
|
|
#define add_dynamic_entry(TAG, VAL) \
|
4224 |
|
|
bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
|
4225 |
|
|
|
4226 |
|
|
if (!info->shared)
|
4227 |
|
|
{
|
4228 |
|
|
if (!add_dynamic_entry (DT_DEBUG, 0))
|
4229 |
|
|
return false;
|
4230 |
|
|
}
|
4231 |
|
|
|
4232 |
|
|
if (htab->splt != NULL && htab->splt->_raw_size != 0)
|
4233 |
|
|
{
|
4234 |
|
|
if (!add_dynamic_entry (DT_PLTGOT, 0)
|
4235 |
|
|
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
|
4236 |
|
|
|| !add_dynamic_entry (DT_PLTREL, DT_RELA)
|
4237 |
|
|
|| !add_dynamic_entry (DT_JMPREL, 0)
|
4238 |
|
|
|| !add_dynamic_entry (DT_PPC64_GLINK, 0))
|
4239 |
|
|
return false;
|
4240 |
|
|
}
|
4241 |
|
|
|
4242 |
|
|
if (NO_OPD_RELOCS)
|
4243 |
|
|
{
|
4244 |
|
|
if (!add_dynamic_entry (DT_PPC64_OPD, 0)
|
4245 |
|
|
|| !add_dynamic_entry (DT_PPC64_OPDSZ, 0))
|
4246 |
|
|
return false;
|
4247 |
|
|
}
|
4248 |
|
|
|
4249 |
|
|
if (relocs)
|
4250 |
|
|
{
|
4251 |
|
|
if (!add_dynamic_entry (DT_RELA, 0)
|
4252 |
|
|
|| !add_dynamic_entry (DT_RELASZ, 0)
|
4253 |
|
|
|| !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
|
4254 |
|
|
return false;
|
4255 |
|
|
|
4256 |
|
|
/* If any dynamic relocs apply to a read-only section,
|
4257 |
|
|
then we need a DT_TEXTREL entry. */
|
4258 |
|
|
if ((info->flags & DF_TEXTREL) == 0)
|
4259 |
|
|
elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
|
4260 |
|
|
(PTR) info);
|
4261 |
|
|
|
4262 |
|
|
if ((info->flags & DF_TEXTREL) != 0)
|
4263 |
|
|
{
|
4264 |
|
|
if (!add_dynamic_entry (DT_TEXTREL, 0))
|
4265 |
|
|
return false;
|
4266 |
|
|
}
|
4267 |
|
|
}
|
4268 |
|
|
}
|
4269 |
|
|
#undef add_dynamic_entry
|
4270 |
|
|
|
4271 |
|
|
return true;
|
4272 |
|
|
}
|
4273 |
|
|
|
4274 |
|
|
/* Determine the type of stub needed, if any, for a call. */
|
4275 |
|
|
|
4276 |
|
|
static INLINE enum ppc_stub_type
|
4277 |
|
|
ppc_type_of_stub (input_sec, rel, hash, destination)
|
4278 |
|
|
asection *input_sec;
|
4279 |
|
|
const Elf_Internal_Rela *rel;
|
4280 |
|
|
struct ppc_link_hash_entry **hash;
|
4281 |
|
|
bfd_vma destination;
|
4282 |
|
|
{
|
4283 |
|
|
struct ppc_link_hash_entry *h = *hash;
|
4284 |
|
|
bfd_vma location;
|
4285 |
|
|
bfd_vma branch_offset;
|
4286 |
|
|
bfd_vma max_branch_offset;
|
4287 |
|
|
unsigned int r_type;
|
4288 |
|
|
|
4289 |
|
|
if (h != NULL)
|
4290 |
|
|
{
|
4291 |
|
|
if (h->oh != NULL
|
4292 |
|
|
&& h->oh->plt.offset != (bfd_vma) -1
|
4293 |
|
|
&& h->oh->dynindx != -1)
|
4294 |
|
|
{
|
4295 |
|
|
*hash = (struct ppc_link_hash_entry *) h->oh;
|
4296 |
|
|
return ppc_stub_plt_call;
|
4297 |
|
|
}
|
4298 |
|
|
|
4299 |
|
|
if (h->elf.root.type == bfd_link_hash_undefweak
|
4300 |
|
|
|| h->elf.root.type == bfd_link_hash_undefined)
|
4301 |
|
|
return ppc_stub_none;
|
4302 |
|
|
}
|
4303 |
|
|
|
4304 |
|
|
/* Determine where the call point is. */
|
4305 |
|
|
location = (input_sec->output_offset
|
4306 |
|
|
+ input_sec->output_section->vma
|
4307 |
|
|
+ rel->r_offset);
|
4308 |
|
|
|
4309 |
|
|
branch_offset = destination - location;
|
4310 |
|
|
r_type = ELF64_R_TYPE (rel->r_info);
|
4311 |
|
|
|
4312 |
|
|
/* Determine if a long branch stub is needed. */
|
4313 |
|
|
max_branch_offset = 1 << 25;
|
4314 |
|
|
if (r_type != (unsigned int) R_PPC64_REL24)
|
4315 |
|
|
max_branch_offset = 1 << 15;
|
4316 |
|
|
|
4317 |
|
|
if (branch_offset + max_branch_offset >= 2 * max_branch_offset)
|
4318 |
|
|
/* We need a stub. Figure out whether a long_branch or plt_branch
|
4319 |
|
|
is needed later. */
|
4320 |
|
|
return ppc_stub_long_branch;
|
4321 |
|
|
|
4322 |
|
|
return ppc_stub_none;
|
4323 |
|
|
}
|
4324 |
|
|
|
4325 |
|
|
/* Build a .plt call stub. */
|
4326 |
|
|
|
4327 |
|
|
static bfd_byte *
|
4328 |
|
|
build_plt_stub (obfd, p, offset, glink)
|
4329 |
|
|
bfd *obfd;
|
4330 |
|
|
bfd_byte *p;
|
4331 |
|
|
int offset;
|
4332 |
|
|
int glink;
|
4333 |
|
|
{
|
4334 |
|
|
#define PPC_LO(v) ((v) & 0xffff)
|
4335 |
|
|
#define PPC_HI(v) (((v) >> 16) & 0xffff)
|
4336 |
|
|
#define PPC_HA(v) PPC_HI ((v) + 0x8000)
|
4337 |
|
|
|
4338 |
|
|
if (glink)
|
4339 |
|
|
bfd_put_32 (obfd, LD_R2_40R1, p), p += 4;
|
4340 |
|
|
bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4;
|
4341 |
|
|
if (!glink)
|
4342 |
|
|
bfd_put_32 (obfd, STD_R2_40R1, p), p += 4;
|
4343 |
|
|
bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
|
4344 |
|
|
if (PPC_HA (offset + 8) != PPC_HA (offset))
|
4345 |
|
|
bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
|
4346 |
|
|
offset += 8;
|
4347 |
|
|
bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4;
|
4348 |
|
|
if (PPC_HA (offset + 8) != PPC_HA (offset))
|
4349 |
|
|
bfd_put_32 (obfd, ADDIS_R12_R12_1, p), p += 4;
|
4350 |
|
|
offset += 8;
|
4351 |
|
|
bfd_put_32 (obfd, MTCTR_R11, p), p += 4;
|
4352 |
|
|
bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4;
|
4353 |
|
|
bfd_put_32 (obfd, BCTR, p), p += 4;
|
4354 |
|
|
return p;
|
4355 |
|
|
}
|
4356 |
|
|
|
4357 |
|
|
static boolean
|
4358 |
|
|
ppc_build_one_stub (gen_entry, in_arg)
|
4359 |
|
|
struct bfd_hash_entry *gen_entry;
|
4360 |
|
|
PTR in_arg;
|
4361 |
|
|
{
|
4362 |
|
|
struct ppc_stub_hash_entry *stub_entry;
|
4363 |
|
|
struct ppc_branch_hash_entry *br_entry;
|
4364 |
|
|
struct bfd_link_info *info;
|
4365 |
|
|
struct ppc_link_hash_table *htab;
|
4366 |
|
|
asection *stub_sec;
|
4367 |
|
|
bfd *stub_bfd;
|
4368 |
|
|
bfd_byte *loc;
|
4369 |
|
|
bfd_byte *p;
|
4370 |
|
|
unsigned int indx;
|
4371 |
|
|
bfd_vma off;
|
4372 |
|
|
int size;
|
4373 |
|
|
|
4374 |
|
|
/* Massage our args to the form they really have. */
|
4375 |
|
|
stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
|
4376 |
|
|
info = (struct bfd_link_info *) in_arg;
|
4377 |
|
|
|
4378 |
|
|
htab = ppc_hash_table (info);
|
4379 |
|
|
stub_sec = stub_entry->stub_sec;
|
4380 |
|
|
|
4381 |
|
|
/* Make a note of the offset within the stubs for this entry. */
|
4382 |
|
|
stub_entry->stub_offset = stub_sec->_cooked_size;
|
4383 |
|
|
loc = stub_sec->contents + stub_entry->stub_offset;
|
4384 |
|
|
|
4385 |
|
|
stub_bfd = stub_sec->owner;
|
4386 |
|
|
|
4387 |
|
|
switch (stub_entry->stub_type)
|
4388 |
|
|
{
|
4389 |
|
|
case ppc_stub_long_branch:
|
4390 |
|
|
/* Branches are relative. This is where we are going to. */
|
4391 |
|
|
off = (stub_entry->target_value
|
4392 |
|
|
+ stub_entry->target_section->output_offset
|
4393 |
|
|
+ stub_entry->target_section->output_section->vma);
|
4394 |
|
|
|
4395 |
|
|
/* And this is where we are coming from. */
|
4396 |
|
|
off -= (stub_entry->stub_offset
|
4397 |
|
|
+ stub_sec->output_offset
|
4398 |
|
|
+ stub_sec->output_section->vma);
|
4399 |
|
|
|
4400 |
|
|
BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26));
|
4401 |
|
|
|
4402 |
|
|
bfd_put_32 (stub_bfd, (bfd_vma) B_DOT | (off & 0x3fffffc), loc);
|
4403 |
|
|
size = 4;
|
4404 |
|
|
break;
|
4405 |
|
|
|
4406 |
|
|
case ppc_stub_plt_branch:
|
4407 |
|
|
br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
|
4408 |
|
|
stub_entry->root.string + 9,
|
4409 |
|
|
false, false);
|
4410 |
|
|
if (br_entry == NULL)
|
4411 |
|
|
{
|
4412 |
|
|
(*_bfd_error_handler) (_("can't find branch stub `%s'"),
|
4413 |
|
|
stub_entry->root.string + 9);
|
4414 |
|
|
htab->stub_error = true;
|
4415 |
|
|
return false;
|
4416 |
|
|
}
|
4417 |
|
|
|
4418 |
|
|
off = (stub_entry->target_value
|
4419 |
|
|
+ stub_entry->target_section->output_offset
|
4420 |
|
|
+ stub_entry->target_section->output_section->vma);
|
4421 |
|
|
|
4422 |
|
|
bfd_put_64 (htab->sbrlt->owner, off,
|
4423 |
|
|
htab->sbrlt->contents + br_entry->offset);
|
4424 |
|
|
|
4425 |
|
|
if (info->shared)
|
4426 |
|
|
{
|
4427 |
|
|
/* Create a reloc for the branch lookup table entry. */
|
4428 |
|
|
Elf_Internal_Rela rela;
|
4429 |
|
|
Elf64_External_Rela *r;
|
4430 |
|
|
|
4431 |
|
|
rela.r_offset = (br_entry->offset
|
4432 |
|
|
+ htab->sbrlt->output_offset
|
4433 |
|
|
+ htab->sbrlt->output_section->vma);
|
4434 |
|
|
rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
|
4435 |
|
|
rela.r_addend = off;
|
4436 |
|
|
|
4437 |
|
|
r = (Elf64_External_Rela *) htab->srelbrlt->contents;
|
4438 |
|
|
r += htab->srelbrlt->reloc_count++;
|
4439 |
|
|
bfd_elf64_swap_reloca_out (htab->srelbrlt->owner, &rela, r);
|
4440 |
|
|
}
|
4441 |
|
|
|
4442 |
|
|
off = (br_entry->offset
|
4443 |
|
|
+ htab->sbrlt->output_offset
|
4444 |
|
|
+ htab->sbrlt->output_section->vma
|
4445 |
|
|
- elf_gp (htab->sbrlt->output_section->owner)
|
4446 |
|
|
- TOC_BASE_OFF);
|
4447 |
|
|
|
4448 |
|
|
if (off + 0x80000000 > 0xffffffff || (off & 7) != 0)
|
4449 |
|
|
{
|
4450 |
|
|
(*_bfd_error_handler)
|
4451 |
|
|
(_("linkage table error against `%s'"),
|
4452 |
|
|
stub_entry->root.string);
|
4453 |
|
|
bfd_set_error (bfd_error_bad_value);
|
4454 |
|
|
htab->stub_error = true;
|
4455 |
|
|
return false;
|
4456 |
|
|
}
|
4457 |
|
|
|
4458 |
|
|
indx = off;
|
4459 |
|
|
bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc);
|
4460 |
|
|
bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc + 4);
|
4461 |
|
|
bfd_put_32 (stub_bfd, (bfd_vma) MTCTR_R11, loc + 8);
|
4462 |
|
|
bfd_put_32 (stub_bfd, (bfd_vma) BCTR, loc + 12);
|
4463 |
|
|
size = 16;
|
4464 |
|
|
break;
|
4465 |
|
|
|
4466 |
|
|
case ppc_stub_plt_call:
|
4467 |
|
|
/* Build the .glink lazy link call stub. */
|
4468 |
|
|
p = htab->sglink->contents + htab->sglink->_cooked_size;
|
4469 |
|
|
indx = htab->sglink->reloc_count;
|
4470 |
|
|
if (indx < 0x8000)
|
4471 |
|
|
{
|
4472 |
|
|
bfd_put_32 (htab->sglink->owner, LI_R0_0 | indx, p);
|
4473 |
|
|
p += 4;
|
4474 |
|
|
}
|
4475 |
|
|
else
|
4476 |
|
|
{
|
4477 |
|
|
bfd_put_32 (htab->sglink->owner, LIS_R0_0 | PPC_HI (indx), p);
|
4478 |
|
|
p += 4;
|
4479 |
|
|
bfd_put_32 (htab->sglink->owner, ORI_R0_R0_0 | PPC_LO (indx), p);
|
4480 |
|
|
p += 4;
|
4481 |
|
|
}
|
4482 |
|
|
bfd_put_32 (htab->sglink->owner,
|
4483 |
|
|
B_DOT | ((htab->sglink->contents - p) & 0x3fffffc), p);
|
4484 |
|
|
p += 4;
|
4485 |
|
|
htab->sglink->_cooked_size = p - htab->sglink->contents;
|
4486 |
|
|
htab->sglink->reloc_count += 1;
|
4487 |
|
|
|
4488 |
|
|
/* Do the best we can for shared libraries built without
|
4489 |
|
|
exporting ".foo" for each "foo". This can happen when symbol
|
4490 |
|
|
versioning scripts strip all bar a subset of symbols. */
|
4491 |
|
|
if (stub_entry->h->oh->root.type != bfd_link_hash_defined
|
4492 |
|
|
&& stub_entry->h->oh->root.type != bfd_link_hash_defweak)
|
4493 |
|
|
{
|
4494 |
|
|
/* Point the symbol at the stub. There may be multiple stubs,
|
4495 |
|
|
we don't really care; The main thing is to make this sym
|
4496 |
|
|
defined somewhere. */
|
4497 |
|
|
stub_entry->h->oh->root.type = bfd_link_hash_defined;
|
4498 |
|
|
stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec;
|
4499 |
|
|
stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset;
|
4500 |
|
|
}
|
4501 |
|
|
|
4502 |
|
|
/* Now build the stub. */
|
4503 |
|
|
off = stub_entry->h->elf.plt.offset;
|
4504 |
|
|
if (off >= (bfd_vma) -2)
|
4505 |
|
|
abort ();
|
4506 |
|
|
|
4507 |
|
|
off &= ~ (bfd_vma) 1;
|
4508 |
|
|
off += (htab->splt->output_offset
|
4509 |
|
|
+ htab->splt->output_section->vma
|
4510 |
|
|
- elf_gp (htab->splt->output_section->owner)
|
4511 |
|
|
- TOC_BASE_OFF);
|
4512 |
|
|
|
4513 |
|
|
if (off + 0x80000000 > 0xffffffff || (off & 7) != 0)
|
4514 |
|
|
{
|
4515 |
|
|
(*_bfd_error_handler)
|
4516 |
|
|
(_("linkage table error against `%s'"),
|
4517 |
|
|
stub_entry->h->elf.root.root.string);
|
4518 |
|
|
bfd_set_error (bfd_error_bad_value);
|
4519 |
|
|
htab->stub_error = true;
|
4520 |
|
|
return false;
|
4521 |
|
|
}
|
4522 |
|
|
|
4523 |
|
|
p = build_plt_stub (stub_bfd, loc, (int) off, 0);
|
4524 |
|
|
size = p - loc;
|
4525 |
|
|
break;
|
4526 |
|
|
|
4527 |
|
|
default:
|
4528 |
|
|
BFD_FAIL ();
|
4529 |
|
|
return false;
|
4530 |
|
|
}
|
4531 |
|
|
|
4532 |
|
|
stub_sec->_cooked_size += size;
|
4533 |
|
|
return true;
|
4534 |
|
|
}
|
4535 |
|
|
|
4536 |
|
|
/* As above, but don't actually build the stub. Just bump offset so
|
4537 |
|
|
we know stub section sizes, and select plt_branch stubs where
|
4538 |
|
|
long_branch stubs won't do. */
|
4539 |
|
|
|
4540 |
|
|
static boolean
|
4541 |
|
|
ppc_size_one_stub (gen_entry, in_arg)
|
4542 |
|
|
struct bfd_hash_entry *gen_entry;
|
4543 |
|
|
PTR in_arg;
|
4544 |
|
|
{
|
4545 |
|
|
struct ppc_stub_hash_entry *stub_entry;
|
4546 |
|
|
struct ppc_link_hash_table *htab;
|
4547 |
|
|
bfd_vma off;
|
4548 |
|
|
int size;
|
4549 |
|
|
|
4550 |
|
|
/* Massage our args to the form they really have. */
|
4551 |
|
|
stub_entry = (struct ppc_stub_hash_entry *) gen_entry;
|
4552 |
|
|
htab = (struct ppc_link_hash_table *) in_arg;
|
4553 |
|
|
|
4554 |
|
|
if (stub_entry->stub_type == ppc_stub_plt_call)
|
4555 |
|
|
{
|
4556 |
|
|
off = stub_entry->h->elf.plt.offset & ~(bfd_vma) 1;
|
4557 |
|
|
off += (htab->splt->output_offset
|
4558 |
|
|
+ htab->splt->output_section->vma
|
4559 |
|
|
- elf_gp (htab->splt->output_section->owner)
|
4560 |
|
|
- TOC_BASE_OFF);
|
4561 |
|
|
|
4562 |
|
|
size = 28;
|
4563 |
|
|
if (PPC_HA ((int) off + 16) != PPC_HA ((int) off))
|
4564 |
|
|
size += 4;
|
4565 |
|
|
}
|
4566 |
|
|
else
|
4567 |
|
|
{
|
4568 |
|
|
/* ppc_stub_long_branch or ppc_stub_plt_branch. */
|
4569 |
|
|
stub_entry->stub_type = ppc_stub_long_branch;
|
4570 |
|
|
size = 4;
|
4571 |
|
|
|
4572 |
|
|
off = (stub_entry->target_value
|
4573 |
|
|
+ stub_entry->target_section->output_offset
|
4574 |
|
|
+ stub_entry->target_section->output_section->vma);
|
4575 |
|
|
off -= (stub_entry->stub_sec->_raw_size
|
4576 |
|
|
+ stub_entry->stub_sec->output_offset
|
4577 |
|
|
+ stub_entry->stub_sec->output_section->vma);
|
4578 |
|
|
|
4579 |
|
|
if (off + (1 << 25) >= (bfd_vma) (1 << 26))
|
4580 |
|
|
{
|
4581 |
|
|
struct ppc_branch_hash_entry *br_entry;
|
4582 |
|
|
|
4583 |
|
|
br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table,
|
4584 |
|
|
stub_entry->root.string + 9,
|
4585 |
|
|
true, false);
|
4586 |
|
|
if (br_entry == NULL)
|
4587 |
|
|
{
|
4588 |
|
|
(*_bfd_error_handler) (_("can't build branch stub `%s'"),
|
4589 |
|
|
stub_entry->root.string + 9);
|
4590 |
|
|
htab->stub_error = true;
|
4591 |
|
|
return false;
|
4592 |
|
|
}
|
4593 |
|
|
|
4594 |
|
|
if (br_entry->iter != htab->stub_iteration)
|
4595 |
|
|
{
|
4596 |
|
|
br_entry->iter = htab->stub_iteration;
|
4597 |
|
|
br_entry->offset = htab->sbrlt->_raw_size;
|
4598 |
|
|
htab->sbrlt->_raw_size += 8;
|
4599 |
|
|
}
|
4600 |
|
|
stub_entry->stub_type = ppc_stub_plt_branch;
|
4601 |
|
|
size = 16;
|
4602 |
|
|
}
|
4603 |
|
|
}
|
4604 |
|
|
|
4605 |
|
|
stub_entry->stub_sec->_raw_size += size;
|
4606 |
|
|
return true;
|
4607 |
|
|
}
|
4608 |
|
|
|
4609 |
|
|
/* Set up various things so that we can make a list of input sections
|
4610 |
|
|
for each output section included in the link. Returns -1 on error,
|
4611 |
|
|
|
4612 |
|
|
|
4613 |
|
|
int
|
4614 |
|
|
ppc64_elf_setup_section_lists (output_bfd, info)
|
4615 |
|
|
bfd *output_bfd;
|
4616 |
|
|
struct bfd_link_info *info;
|
4617 |
|
|
{
|
4618 |
|
|
bfd *input_bfd;
|
4619 |
|
|
int top_id, top_index;
|
4620 |
|
|
asection *section;
|
4621 |
|
|
asection **input_list, **list;
|
4622 |
|
|
bfd_size_type amt;
|
4623 |
|
|
struct ppc_link_hash_table *htab = ppc_hash_table (info);
|
4624 |
|
|
|
4625 |
|
|
if (htab->elf.root.creator->flavour != bfd_target_elf_flavour
|
4626 |
|
|
|| htab->sbrlt == NULL)
|
4627 |
|
|
return 0;
|
4628 |
|
|
|
4629 |
|
|
/* Find the top input section id. */
|
4630 |
|
|
for (input_bfd = info->input_bfds, top_id = 0;
|
4631 |
|
|
input_bfd != NULL;
|
4632 |
|
|
input_bfd = input_bfd->link_next)
|
4633 |
|
|
{
|
4634 |
|
|
for (section = input_bfd->sections;
|
4635 |
|
|
section != NULL;
|
4636 |
|
|
section = section->next)
|
4637 |
|
|
{
|
4638 |
|
|
if (top_id < section->id)
|
4639 |
|
|
top_id = section->id;
|
4640 |
|
|
}
|
4641 |
|
|
}
|
4642 |
|
|
|
4643 |
|
|
amt = sizeof (struct map_stub) * (top_id + 1);
|
4644 |
|
|
htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
|
4645 |
|
|
if (htab->stub_group == NULL)
|
4646 |
|
|
return -1;
|
4647 |
|
|
|
4648 |
|
|
/* We can't use output_bfd->section_count here to find the top output
|
4649 |
|
|
section index as some sections may have been removed, and
|
4650 |
|
|
_bfd_strip_section_from_output doesn't renumber the indices. */
|
4651 |
|
|
for (section = output_bfd->sections, top_index = 0;
|
4652 |
|
|
section != NULL;
|
4653 |
|
|
section = section->next)
|
4654 |
|
|
{
|
4655 |
|
|
if (top_index < section->index)
|
4656 |
|
|
top_index = section->index;
|
4657 |
|
|
}
|
4658 |
|
|
|
4659 |
|
|
htab->top_index = top_index;
|
4660 |
|
|
amt = sizeof (asection *) * (top_index + 1);
|
4661 |
|
|
input_list = (asection **) bfd_malloc (amt);
|
4662 |
|
|
htab->input_list = input_list;
|
4663 |
|
|
if (input_list == NULL)
|
4664 |
|
|
return -1;
|
4665 |
|
|
|
4666 |
|
|
/* For sections we aren't interested in, mark their entries with a
|
4667 |
|
|
value we can check later. */
|
4668 |
|
|
list = input_list + top_index;
|
4669 |
|
|
do
|
4670 |
|
|
*list = bfd_abs_section_ptr;
|
4671 |
|
|
while (list-- != input_list);
|
4672 |
|
|
|
4673 |
|
|
for (section = output_bfd->sections;
|
4674 |
|
|
section != NULL;
|
4675 |
|
|
section = section->next)
|
4676 |
|
|
{
|
4677 |
|
|
if ((section->flags & SEC_CODE) != 0)
|
4678 |
|
|
input_list[section->index] = NULL;
|
4679 |
|
|
}
|
4680 |
|
|
|
4681 |
|
|
return 1;
|
4682 |
|
|
}
|
4683 |
|
|
|
4684 |
|
|
/* The linker repeatedly calls this function for each input section,
|
4685 |
|
|
in the order that input sections are linked into output sections.
|
4686 |
|
|
Build lists of input sections to determine groupings between which
|
4687 |
|
|
we may insert linker stubs. */
|
4688 |
|
|
|
4689 |
|
|
void
|
4690 |
|
|
ppc64_elf_next_input_section (info, isec)
|
4691 |
|
|
struct bfd_link_info *info;
|
4692 |
|
|
asection *isec;
|
4693 |
|
|
{
|
4694 |
|
|
struct ppc_link_hash_table *htab = ppc_hash_table (info);
|
4695 |
|
|
|
4696 |
|
|
if (isec->output_section->index <= htab->top_index)
|
4697 |
|
|
{
|
4698 |
|
|
asection **list = htab->input_list + isec->output_section->index;
|
4699 |
|
|
if (*list != bfd_abs_section_ptr)
|
4700 |
|
|
{
|
4701 |
|
|
/* Steal the link_sec pointer for our list. */
|
4702 |
|
|
#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
|
4703 |
|
|
/* This happens to make the list in reverse order,
|
4704 |
|
|
which is what we want. */
|
4705 |
|
|
PREV_SEC (isec) = *list;
|
4706 |
|
|
*list = isec;
|
4707 |
|
|
}
|
4708 |
|
|
}
|
4709 |
|
|
}
|
4710 |
|
|
|
4711 |
|
|
/* See whether we can group stub sections together. Grouping stub
|
4712 |
|
|
sections may result in fewer stubs. More importantly, we need to
|
4713 |
|
|
put all .init* and .fini* stubs at the beginning of the .init or
|
4714 |
|
|
.fini output sections respectively, because glibc splits the
|
4715 |
|
|
_init and _fini functions into multiple parts. Putting a stub in
|
4716 |
|
|
the middle of a function is not a good idea. */
|
4717 |
|
|
|
4718 |
|
|
static void
|
4719 |
|
|
group_sections (htab, stub_group_size, stubs_always_before_branch)
|
4720 |
|
|
struct ppc_link_hash_table *htab;
|
4721 |
|
|
bfd_size_type stub_group_size;
|
4722 |
|
|
boolean stubs_always_before_branch;
|
4723 |
|
|
{
|
4724 |
|
|
asection **list = htab->input_list + htab->top_index;
|
4725 |
|
|
do
|
4726 |
|
|
{
|
4727 |
|
|
asection *tail = *list;
|
4728 |
|
|
if (tail == bfd_abs_section_ptr)
|
4729 |
|
|
continue;
|
4730 |
|
|
while (tail != NULL)
|
4731 |
|
|
{
|
4732 |
|
|
asection *curr;
|
4733 |
|
|
asection *prev;
|
4734 |
|
|
bfd_size_type total;
|
4735 |
|
|
|
4736 |
|
|
curr = tail;
|
4737 |
|
|
if (tail->_cooked_size)
|
4738 |
|
|
total = tail->_cooked_size;
|
4739 |
|
|
else
|
4740 |
|
|
total = tail->_raw_size;
|
4741 |
|
|
while ((prev = PREV_SEC (curr)) != NULL
|
4742 |
|
|
&& ((total += curr->output_offset - prev->output_offset)
|
4743 |
|
|
< stub_group_size))
|
4744 |
|
|
curr = prev;
|
4745 |
|
|
|
4746 |
|
|
/* OK, the size from the start of CURR to the end is less
|
4747 |
|
|
than stub_group_size and thus can be handled by one stub
|
4748 |
|
|
section. (or the tail section is itself larger than
|
4749 |
|
|
stub_group_size, in which case we may be toast.) We
|
4750 |
|
|
should really be keeping track of the total size of stubs
|
4751 |
|
|
added here, as stubs contribute to the final output
|
4752 |
|
|
section size. That's a little tricky, and this way will
|
4753 |
|
|
only break if stubs added make the total size more than
|
4754 |
|
|
2^25, ie. for the default stub_group_size, if stubs total
|
4755 |
|
|
more than 2834432 bytes, or over 100000 plt call stubs. */
|
4756 |
|
|
do
|
4757 |
|
|
{
|
4758 |
|
|
prev = PREV_SEC (tail);
|
4759 |
|
|
/* Set up this stub group. */
|
4760 |
|
|
htab->stub_group[tail->id].link_sec = curr;
|
4761 |
|
|
}
|
4762 |
|
|
while (tail != curr && (tail = prev) != NULL);
|
4763 |
|
|
|
4764 |
|
|
/* But wait, there's more! Input sections up to stub_group_size
|
4765 |
|
|
bytes before the stub section can be handled by it too. */
|
4766 |
|
|
if (!stubs_always_before_branch)
|
4767 |
|
|
{
|
4768 |
|
|
total = 0;
|
4769 |
|
|
while (prev != NULL
|
4770 |
|
|
&& ((total += tail->output_offset - prev->output_offset)
|
4771 |
|
|
< stub_group_size))
|
4772 |
|
|
{
|
4773 |
|
|
tail = prev;
|
4774 |
|
|
prev = PREV_SEC (tail);
|
4775 |
|
|
htab->stub_group[tail->id].link_sec = curr;
|
4776 |
|
|
}
|
4777 |
|
|
}
|
4778 |
|
|
tail = prev;
|
4779 |
|
|
}
|
4780 |
|
|
}
|
4781 |
|
|
while (list-- != htab->input_list);
|
4782 |
|
|
free (htab->input_list);
|
4783 |
|
|
#undef PREV_SEC
|
4784 |
|
|
}
|
4785 |
|
|
|
4786 |
|
|
/* Determine and set the size of the stub section for a final link.
|
4787 |
|
|
|
4788 |
|
|
The basic idea here is to examine all the relocations looking for
|
4789 |
|
|
PC-relative calls to a target that is unreachable with a "bl"
|
4790 |
|
|
instruction. */
|
4791 |
|
|
|
4792 |
|
|
boolean
|
4793 |
|
|
ppc64_elf_size_stubs (output_bfd, stub_bfd, info, group_size,
|
4794 |
|
|
add_stub_section, layout_sections_again)
|
4795 |
|
|
bfd *output_bfd;
|
4796 |
|
|
bfd *stub_bfd;
|
4797 |
|
|
struct bfd_link_info *info;
|
4798 |
|
|
bfd_signed_vma group_size;
|
4799 |
|
|
asection * (*add_stub_section) PARAMS ((const char *, asection *));
|
4800 |
|
|
void (*layout_sections_again) PARAMS ((void));
|
4801 |
|
|
{
|
4802 |
|
|
bfd_size_type stub_group_size;
|
4803 |
|
|
boolean stubs_always_before_branch;
|
4804 |
|
|
struct ppc_link_hash_table *htab = ppc_hash_table (info);
|
4805 |
|
|
|
4806 |
|
|
/* Stash our params away. */
|
4807 |
|
|
htab->stub_bfd = stub_bfd;
|
4808 |
|
|
htab->add_stub_section = add_stub_section;
|
4809 |
|
|
htab->layout_sections_again = layout_sections_again;
|
4810 |
|
|
stubs_always_before_branch = group_size < 0;
|
4811 |
|
|
if (group_size < 0)
|
4812 |
|
|
stub_group_size = -group_size;
|
4813 |
|
|
else
|
4814 |
|
|
stub_group_size = group_size;
|
4815 |
|
|
if (stub_group_size == 1)
|
4816 |
|
|
{
|
4817 |
|
|
/* Default values. */
|
4818 |
|
|
stub_group_size = 30720000;
|
4819 |
|
|
if (htab->has_14bit_branch)
|
4820 |
|
|
stub_group_size = 30000;
|
4821 |
|
|
}
|
4822 |
|
|
|
4823 |
|
|
group_sections (htab, stub_group_size, stubs_always_before_branch);
|
4824 |
|
|
|
4825 |
|
|
while (1)
|
4826 |
|
|
{
|
4827 |
|
|
bfd *input_bfd;
|
4828 |
|
|
unsigned int bfd_indx;
|
4829 |
|
|
asection *stub_sec;
|
4830 |
|
|
boolean stub_changed;
|
4831 |
|
|
|
4832 |
|
|
htab->stub_iteration += 1;
|
4833 |
|
|
stub_changed = false;
|
4834 |
|
|
|
4835 |
|
|
for (input_bfd = info->input_bfds, bfd_indx = 0;
|
4836 |
|
|
input_bfd != NULL;
|
4837 |
|
|
input_bfd = input_bfd->link_next, bfd_indx++)
|
4838 |
|
|
{
|
4839 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
4840 |
|
|
asection *section;
|
4841 |
|
|
Elf_Internal_Sym *local_syms = NULL;
|
4842 |
|
|
|
4843 |
|
|
/* We'll need the symbol table in a second. */
|
4844 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
4845 |
|
|
if (symtab_hdr->sh_info == 0)
|
4846 |
|
|
continue;
|
4847 |
|
|
|
4848 |
|
|
/* Walk over each section attached to the input bfd. */
|
4849 |
|
|
for (section = input_bfd->sections;
|
4850 |
|
|
section != NULL;
|
4851 |
|
|
section = section->next)
|
4852 |
|
|
{
|
4853 |
|
|
Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
|
4854 |
|
|
|
4855 |
|
|
/* If there aren't any relocs, then there's nothing more
|
4856 |
|
|
to do. */
|
4857 |
|
|
if ((section->flags & SEC_RELOC) == 0
|
4858 |
|
|
|| section->reloc_count == 0)
|
4859 |
|
|
continue;
|
4860 |
|
|
|
4861 |
|
|
/* If this section is a link-once section that will be
|
4862 |
|
|
discarded, then don't create any stubs. */
|
4863 |
|
|
if (section->output_section == NULL
|
4864 |
|
|
|| section->output_section->owner != output_bfd)
|
4865 |
|
|
continue;
|
4866 |
|
|
|
4867 |
|
|
/* Get the relocs. */
|
4868 |
|
|
internal_relocs
|
4869 |
|
|
= _bfd_elf64_link_read_relocs (input_bfd, section, NULL,
|
4870 |
|
|
(Elf_Internal_Rela *) NULL,
|
4871 |
|
|
info->keep_memory);
|
4872 |
|
|
if (internal_relocs == NULL)
|
4873 |
|
|
goto error_ret_free_local;
|
4874 |
|
|
|
4875 |
|
|
/* Now examine each relocation. */
|
4876 |
|
|
irela = internal_relocs;
|
4877 |
|
|
irelaend = irela + section->reloc_count;
|
4878 |
|
|
for (; irela < irelaend; irela++)
|
4879 |
|
|
{
|
4880 |
|
|
unsigned int r_type, r_indx;
|
4881 |
|
|
enum ppc_stub_type stub_type;
|
4882 |
|
|
struct ppc_stub_hash_entry *stub_entry;
|
4883 |
|
|
asection *sym_sec;
|
4884 |
|
|
bfd_vma sym_value;
|
4885 |
|
|
bfd_vma destination;
|
4886 |
|
|
struct ppc_link_hash_entry *hash;
|
4887 |
|
|
char *stub_name;
|
4888 |
|
|
const asection *id_sec;
|
4889 |
|
|
|
4890 |
|
|
r_type = ELF64_R_TYPE (irela->r_info);
|
4891 |
|
|
r_indx = ELF64_R_SYM (irela->r_info);
|
4892 |
|
|
|
4893 |
|
|
if (r_type >= (unsigned int) R_PPC_max)
|
4894 |
|
|
{
|
4895 |
|
|
bfd_set_error (bfd_error_bad_value);
|
4896 |
|
|
goto error_ret_free_internal;
|
4897 |
|
|
}
|
4898 |
|
|
|
4899 |
|
|
/* Only look for stubs on branch instructions. */
|
4900 |
|
|
if (r_type != (unsigned int) R_PPC64_REL24
|
4901 |
|
|
&& r_type != (unsigned int) R_PPC64_REL14
|
4902 |
|
|
&& r_type != (unsigned int) R_PPC64_REL14_BRTAKEN
|
4903 |
|
|
&& r_type != (unsigned int) R_PPC64_REL14_BRNTAKEN)
|
4904 |
|
|
continue;
|
4905 |
|
|
|
4906 |
|
|
/* Now determine the call target, its name, value,
|
4907 |
|
|
section. */
|
4908 |
|
|
sym_sec = NULL;
|
4909 |
|
|
sym_value = 0;
|
4910 |
|
|
destination = 0;
|
4911 |
|
|
hash = NULL;
|
4912 |
|
|
if (r_indx < symtab_hdr->sh_info)
|
4913 |
|
|
{
|
4914 |
|
|
/* It's a local symbol. */
|
4915 |
|
|
Elf_Internal_Sym *sym;
|
4916 |
|
|
Elf_Internal_Shdr *hdr;
|
4917 |
|
|
|
4918 |
|
|
if (local_syms == NULL)
|
4919 |
|
|
{
|
4920 |
|
|
local_syms
|
4921 |
|
|
= (Elf_Internal_Sym *) symtab_hdr->contents;
|
4922 |
|
|
if (local_syms == NULL)
|
4923 |
|
|
local_syms
|
4924 |
|
|
= bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
|
4925 |
|
|
symtab_hdr->sh_info, 0,
|
4926 |
|
|
NULL, NULL, NULL);
|
4927 |
|
|
if (local_syms == NULL)
|
4928 |
|
|
goto error_ret_free_internal;
|
4929 |
|
|
}
|
4930 |
|
|
sym = local_syms + r_indx;
|
4931 |
|
|
hdr = elf_elfsections (input_bfd)[sym->st_shndx];
|
4932 |
|
|
sym_sec = hdr->bfd_section;
|
4933 |
|
|
if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
|
4934 |
|
|
sym_value = sym->st_value;
|
4935 |
|
|
destination = (sym_value + irela->r_addend
|
4936 |
|
|
+ sym_sec->output_offset
|
4937 |
|
|
+ sym_sec->output_section->vma);
|
4938 |
|
|
}
|
4939 |
|
|
else
|
4940 |
|
|
{
|
4941 |
|
|
/* It's an external symbol. */
|
4942 |
|
|
int e_indx;
|
4943 |
|
|
|
4944 |
|
|
e_indx = r_indx - symtab_hdr->sh_info;
|
4945 |
|
|
hash = ((struct ppc_link_hash_entry *)
|
4946 |
|
|
elf_sym_hashes (input_bfd)[e_indx]);
|
4947 |
|
|
|
4948 |
|
|
while (hash->elf.root.type == bfd_link_hash_indirect
|
4949 |
|
|
|| hash->elf.root.type == bfd_link_hash_warning)
|
4950 |
|
|
hash = ((struct ppc_link_hash_entry *)
|
4951 |
|
|
hash->elf.root.u.i.link);
|
4952 |
|
|
|
4953 |
|
|
if (hash->elf.root.type == bfd_link_hash_defined
|
4954 |
|
|
|| hash->elf.root.type == bfd_link_hash_defweak)
|
4955 |
|
|
{
|
4956 |
|
|
sym_sec = hash->elf.root.u.def.section;
|
4957 |
|
|
sym_value = hash->elf.root.u.def.value;
|
4958 |
|
|
if (sym_sec->output_section != NULL)
|
4959 |
|
|
destination = (sym_value + irela->r_addend
|
4960 |
|
|
+ sym_sec->output_offset
|
4961 |
|
|
+ sym_sec->output_section->vma);
|
4962 |
|
|
}
|
4963 |
|
|
else if (hash->elf.root.type == bfd_link_hash_undefweak)
|
4964 |
|
|
;
|
4965 |
|
|
else if (hash->elf.root.type == bfd_link_hash_undefined)
|
4966 |
|
|
;
|
4967 |
|
|
else
|
4968 |
|
|
{
|
4969 |
|
|
bfd_set_error (bfd_error_bad_value);
|
4970 |
|
|
goto error_ret_free_internal;
|
4971 |
|
|
}
|
4972 |
|
|
}
|
4973 |
|
|
|
4974 |
|
|
/* Determine what (if any) linker stub is needed. */
|
4975 |
|
|
stub_type = ppc_type_of_stub (section, irela, &hash,
|
4976 |
|
|
destination);
|
4977 |
|
|
if (stub_type == ppc_stub_none)
|
4978 |
|
|
continue;
|
4979 |
|
|
|
4980 |
|
|
/* Support for grouping stub sections. */
|
4981 |
|
|
id_sec = htab->stub_group[section->id].link_sec;
|
4982 |
|
|
|
4983 |
|
|
/* Get the name of this stub. */
|
4984 |
|
|
stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela);
|
4985 |
|
|
if (!stub_name)
|
4986 |
|
|
goto error_ret_free_internal;
|
4987 |
|
|
|
4988 |
|
|
stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table,
|
4989 |
|
|
stub_name, false, false);
|
4990 |
|
|
if (stub_entry != NULL)
|
4991 |
|
|
{
|
4992 |
|
|
/* The proper stub has already been created. */
|
4993 |
|
|
free (stub_name);
|
4994 |
|
|
continue;
|
4995 |
|
|
}
|
4996 |
|
|
|
4997 |
|
|
stub_entry = ppc_add_stub (stub_name, section, htab);
|
4998 |
|
|
if (stub_entry == NULL)
|
4999 |
|
|
{
|
5000 |
|
|
free (stub_name);
|
5001 |
|
|
error_ret_free_internal:
|
5002 |
|
|
if (elf_section_data (section)->relocs == NULL)
|
5003 |
|
|
free (internal_relocs);
|
5004 |
|
|
error_ret_free_local:
|
5005 |
|
|
if (local_syms != NULL
|
5006 |
|
|
&& (symtab_hdr->contents
|
5007 |
|
|
!= (unsigned char *) local_syms))
|
5008 |
|
|
free (local_syms);
|
5009 |
|
|
return false;
|
5010 |
|
|
}
|
5011 |
|
|
|
5012 |
|
|
stub_entry->target_value = sym_value;
|
5013 |
|
|
stub_entry->target_section = sym_sec;
|
5014 |
|
|
stub_entry->stub_type = stub_type;
|
5015 |
|
|
stub_entry->h = hash;
|
5016 |
|
|
stub_changed = true;
|
5017 |
|
|
}
|
5018 |
|
|
|
5019 |
|
|
/* We're done with the internal relocs, free them. */
|
5020 |
|
|
if (elf_section_data (section)->relocs != internal_relocs)
|
5021 |
|
|
free (internal_relocs);
|
5022 |
|
|
}
|
5023 |
|
|
|
5024 |
|
|
if (local_syms != NULL
|
5025 |
|
|
&& symtab_hdr->contents != (unsigned char *) local_syms)
|
5026 |
|
|
{
|
5027 |
|
|
if (!info->keep_memory)
|
5028 |
|
|
free (local_syms);
|
5029 |
|
|
else
|
5030 |
|
|
symtab_hdr->contents = (unsigned char *) local_syms;
|
5031 |
|
|
}
|
5032 |
|
|
}
|
5033 |
|
|
|
5034 |
|
|
if (!stub_changed)
|
5035 |
|
|
break;
|
5036 |
|
|
|
5037 |
|
|
/* OK, we've added some stubs. Find out the new size of the
|
5038 |
|
|
stub sections. */
|
5039 |
|
|
for (stub_sec = htab->stub_bfd->sections;
|
5040 |
|
|
stub_sec != NULL;
|
5041 |
|
|
stub_sec = stub_sec->next)
|
5042 |
|
|
{
|
5043 |
|
|
stub_sec->_raw_size = 0;
|
5044 |
|
|
stub_sec->_cooked_size = 0;
|
5045 |
|
|
}
|
5046 |
|
|
htab->sbrlt->_raw_size = 0;
|
5047 |
|
|
htab->sbrlt->_cooked_size = 0;
|
5048 |
|
|
|
5049 |
|
|
bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab);
|
5050 |
|
|
|
5051 |
|
|
/* Ask the linker to do its stuff. */
|
5052 |
|
|
(*htab->layout_sections_again) ();
|
5053 |
|
|
}
|
5054 |
|
|
|
5055 |
|
|
/* It would be nice to strip .branch_lt from the output if the
|
5056 |
|
|
section is empty, but it's too late. If we strip sections here,
|
5057 |
|
|
the dynamic symbol table is corrupted since the section symbol
|
5058 |
|
|
for the stripped section isn't written. */
|
5059 |
|
|
|
5060 |
|
|
return true;
|
5061 |
|
|
}
|
5062 |
|
|
|
5063 |
|
|
/* Called after we have determined section placement. If sections
|
5064 |
|
|
move, we'll be called again. Provide a value for TOCstart. */
|
5065 |
|
|
|
5066 |
|
|
bfd_vma
|
5067 |
|
|
ppc64_elf_toc (obfd)
|
5068 |
|
|
bfd *obfd;
|
5069 |
|
|
{
|
5070 |
|
|
asection *s;
|
5071 |
|
|
bfd_vma TOCstart;
|
5072 |
|
|
|
5073 |
|
|
/* The TOC consists of sections .got, .toc, .tocbss, .plt in that
|
5074 |
|
|
order. The TOC starts where the first of these sections starts. */
|
5075 |
|
|
s = bfd_get_section_by_name (obfd, ".got");
|
5076 |
|
|
if (s == NULL)
|
5077 |
|
|
s = bfd_get_section_by_name (obfd, ".toc");
|
5078 |
|
|
if (s == NULL)
|
5079 |
|
|
s = bfd_get_section_by_name (obfd, ".tocbss");
|
5080 |
|
|
if (s == NULL)
|
5081 |
|
|
s = bfd_get_section_by_name (obfd, ".plt");
|
5082 |
|
|
if (s == NULL)
|
5083 |
|
|
{
|
5084 |
|
|
/* This may happen for
|
5085 |
|
|
o references to TOC base (SYM@toc / TOC[tc0]) without a
|
5086 |
|
|
.toc directive
|
5087 |
|
|
o bad linker script
|
5088 |
|
|
o --gc-sections and empty TOC sections
|
5089 |
|
|
|
5090 |
|
|
FIXME: Warn user? */
|
5091 |
|
|
|
5092 |
|
|
/* Look for a likely section. We probably won't even be
|
5093 |
|
|
using TOCstart. */
|
5094 |
|
|
for (s = obfd->sections; s != NULL; s = s->next)
|
5095 |
|
|
if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY))
|
5096 |
|
|
== (SEC_ALLOC | SEC_SMALL_DATA))
|
5097 |
|
|
break;
|
5098 |
|
|
if (s == NULL)
|
5099 |
|
|
for (s = obfd->sections; s != NULL; s = s->next)
|
5100 |
|
|
if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA))
|
5101 |
|
|
== (SEC_ALLOC | SEC_SMALL_DATA))
|
5102 |
|
|
break;
|
5103 |
|
|
if (s == NULL)
|
5104 |
|
|
for (s = obfd->sections; s != NULL; s = s->next)
|
5105 |
|
|
if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC)
|
5106 |
|
|
break;
|
5107 |
|
|
if (s == NULL)
|
5108 |
|
|
for (s = obfd->sections; s != NULL; s = s->next)
|
5109 |
|
|
if ((s->flags & SEC_ALLOC) == SEC_ALLOC)
|
5110 |
|
|
break;
|
5111 |
|
|
}
|
5112 |
|
|
|
5113 |
|
|
TOCstart = 0;
|
5114 |
|
|
if (s != NULL)
|
5115 |
|
|
TOCstart = s->output_section->vma + s->output_offset;
|
5116 |
|
|
|
5117 |
|
|
return TOCstart;
|
5118 |
|
|
}
|
5119 |
|
|
|
5120 |
|
|
/* Build all the stubs associated with the current output file.
|
5121 |
|
|
The stubs are kept in a hash table attached to the main linker
|
5122 |
|
|
hash table. This function is called via gldelf64ppc_finish. */
|
5123 |
|
|
|
5124 |
|
|
boolean
|
5125 |
|
|
ppc64_elf_build_stubs (info)
|
5126 |
|
|
struct bfd_link_info *info;
|
5127 |
|
|
{
|
5128 |
|
|
struct ppc_link_hash_table *htab = ppc_hash_table (info);
|
5129 |
|
|
asection *stub_sec;
|
5130 |
|
|
bfd_vma plt_r2;
|
5131 |
|
|
bfd_byte *p;
|
5132 |
|
|
|
5133 |
|
|
for (stub_sec = htab->stub_bfd->sections;
|
5134 |
|
|
stub_sec != NULL;
|
5135 |
|
|
stub_sec = stub_sec->next)
|
5136 |
|
|
{
|
5137 |
|
|
bfd_size_type size;
|
5138 |
|
|
|
5139 |
|
|
/* Allocate memory to hold the linker stubs. */
|
5140 |
|
|
size = stub_sec->_raw_size;
|
5141 |
|
|
if (size != 0)
|
5142 |
|
|
{
|
5143 |
|
|
stub_sec->contents = (bfd_byte *) bfd_zalloc (htab->stub_bfd, size);
|
5144 |
|
|
if (stub_sec->contents == NULL)
|
5145 |
|
|
return false;
|
5146 |
|
|
}
|
5147 |
|
|
stub_sec->_cooked_size = 0;
|
5148 |
|
|
}
|
5149 |
|
|
|
5150 |
|
|
if (htab->splt != NULL)
|
5151 |
|
|
{
|
5152 |
|
|
/* Build the .glink plt call stub. */
|
5153 |
|
|
plt_r2 = (htab->splt->output_offset
|
5154 |
|
|
+ htab->splt->output_section->vma
|
5155 |
|
|
- elf_gp (htab->splt->output_section->owner)
|
5156 |
|
|
- TOC_BASE_OFF);
|
5157 |
|
|
p = htab->sglink->contents;
|
5158 |
|
|
p = build_plt_stub (htab->sglink->owner, p, (int) plt_r2, 1);
|
5159 |
|
|
while (p - htab->sglink->contents < GLINK_CALL_STUB_SIZE)
|
5160 |
|
|
{
|
5161 |
|
|
bfd_put_32 (htab->sglink->owner, NOP, p);
|
5162 |
|
|
p += 4;
|
5163 |
|
|
}
|
5164 |
|
|
htab->sglink->_cooked_size = p - htab->sglink->contents;
|
5165 |
|
|
|
5166 |
|
|
/* Use reloc_count to count entries. */
|
5167 |
|
|
htab->sglink->reloc_count = 0;
|
5168 |
|
|
}
|
5169 |
|
|
|
5170 |
|
|
if (htab->sbrlt->_raw_size != 0)
|
5171 |
|
|
{
|
5172 |
|
|
htab->sbrlt->contents = (bfd_byte *) bfd_zalloc (htab->sbrlt->owner,
|
5173 |
|
|
htab->sbrlt->_raw_size);
|
5174 |
|
|
if (htab->sbrlt->contents == NULL)
|
5175 |
|
|
return false;
|
5176 |
|
|
}
|
5177 |
|
|
|
5178 |
|
|
/* Build the stubs as directed by the stub hash table. */
|
5179 |
|
|
bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info);
|
5180 |
|
|
htab->sglink->reloc_count = 0;
|
5181 |
|
|
|
5182 |
|
|
for (stub_sec = htab->stub_bfd->sections;
|
5183 |
|
|
stub_sec != NULL;
|
5184 |
|
|
stub_sec = stub_sec->next)
|
5185 |
|
|
{
|
5186 |
|
|
if (stub_sec->_raw_size != stub_sec->_cooked_size)
|
5187 |
|
|
break;
|
5188 |
|
|
}
|
5189 |
|
|
|
5190 |
|
|
if (stub_sec != NULL
|
5191 |
|
|
|| htab->sglink->_raw_size != htab->sglink->_cooked_size)
|
5192 |
|
|
{
|
5193 |
|
|
htab->stub_error = true;
|
5194 |
|
|
(*_bfd_error_handler) (_("stubs don't match calculated size"));
|
5195 |
|
|
}
|
5196 |
|
|
|
5197 |
|
|
return !htab->stub_error;
|
5198 |
|
|
}
|
5199 |
|
|
|
5200 |
|
|
/* The RELOCATE_SECTION function is called by the ELF backend linker
|
5201 |
|
|
to handle the relocations for a section.
|
5202 |
|
|
|
5203 |
|
|
The relocs are always passed as Rela structures; if the section
|
5204 |
|
|
actually uses Rel structures, the r_addend field will always be
|
5205 |
|
|
zero.
|
5206 |
|
|
|
5207 |
|
|
This function is responsible for adjust the section contents as
|
5208 |
|
|
necessary, and (if using Rela relocs and generating a
|
5209 |
|
|
relocateable output file) adjusting the reloc addend as
|
5210 |
|
|
necessary.
|
5211 |
|
|
|
5212 |
|
|
This function does not have to worry about setting the reloc
|
5213 |
|
|
address or the reloc symbol index.
|
5214 |
|
|
|
5215 |
|
|
LOCAL_SYMS is a pointer to the swapped in local symbols.
|
5216 |
|
|
|
5217 |
|
|
LOCAL_SECTIONS is an array giving the section in the input file
|
5218 |
|
|
corresponding to the st_shndx field of each local symbol.
|
5219 |
|
|
|
5220 |
|
|
The global hash table entry for the global symbols can be found
|
5221 |
|
|
via elf_sym_hashes (input_bfd).
|
5222 |
|
|
|
5223 |
|
|
When generating relocateable output, this function must handle
|
5224 |
|
|
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
|
5225 |
|
|
going to be the section symbol corresponding to the output
|
5226 |
|
|
section, which means that the addend must be adjusted
|
5227 |
|
|
accordingly. */
|
5228 |
|
|
|
5229 |
|
|
static boolean
|
5230 |
|
|
ppc64_elf_relocate_section (output_bfd, info, input_bfd, input_section,
|
5231 |
|
|
contents, relocs, local_syms, local_sections)
|
5232 |
|
|
bfd *output_bfd;
|
5233 |
|
|
struct bfd_link_info *info;
|
5234 |
|
|
bfd *input_bfd;
|
5235 |
|
|
asection *input_section;
|
5236 |
|
|
bfd_byte *contents;
|
5237 |
|
|
Elf_Internal_Rela *relocs;
|
5238 |
|
|
Elf_Internal_Sym *local_syms;
|
5239 |
|
|
asection **local_sections;
|
5240 |
|
|
{
|
5241 |
|
|
struct ppc_link_hash_table *htab;
|
5242 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
5243 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
5244 |
|
|
Elf_Internal_Rela *rel;
|
5245 |
|
|
Elf_Internal_Rela *relend;
|
5246 |
|
|
bfd_vma *local_got_offsets;
|
5247 |
|
|
bfd_vma TOCstart;
|
5248 |
|
|
boolean ret = true;
|
5249 |
|
|
boolean is_opd;
|
5250 |
|
|
/* Disabled until we sort out how ld should choose 'y' vs 'at'. */
|
5251 |
|
|
boolean is_power4 = false;
|
5252 |
|
|
|
5253 |
|
|
if (info->relocateable)
|
5254 |
|
|
return true;
|
5255 |
|
|
|
5256 |
|
|
/* Initialize howto table if needed. */
|
5257 |
|
|
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
|
5258 |
|
|
ppc_howto_init ();
|
5259 |
|
|
|
5260 |
|
|
htab = ppc_hash_table (info);
|
5261 |
|
|
local_got_offsets = elf_local_got_offsets (input_bfd);
|
5262 |
|
|
TOCstart = elf_gp (output_bfd);
|
5263 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
5264 |
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
5265 |
|
|
is_opd = elf_section_data (input_section)->tdata != NULL;
|
5266 |
|
|
|
5267 |
|
|
rel = relocs;
|
5268 |
|
|
relend = relocs + input_section->reloc_count;
|
5269 |
|
|
for (; rel < relend; rel++)
|
5270 |
|
|
{
|
5271 |
|
|
enum elf_ppc_reloc_type r_type;
|
5272 |
|
|
bfd_vma offset;
|
5273 |
|
|
bfd_vma addend;
|
5274 |
|
|
bfd_reloc_status_type r;
|
5275 |
|
|
Elf_Internal_Sym *sym;
|
5276 |
|
|
asection *sec;
|
5277 |
|
|
struct elf_link_hash_entry *h;
|
5278 |
|
|
struct elf_link_hash_entry *fdh;
|
5279 |
|
|
const char *sym_name;
|
5280 |
|
|
unsigned long r_symndx;
|
5281 |
|
|
bfd_vma relocation;
|
5282 |
|
|
boolean unresolved_reloc;
|
5283 |
|
|
boolean warned;
|
5284 |
|
|
long insn;
|
5285 |
|
|
struct ppc_stub_hash_entry *stub_entry;
|
5286 |
|
|
bfd_vma max_br_offset;
|
5287 |
|
|
bfd_vma from;
|
5288 |
|
|
|
5289 |
|
|
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
|
5290 |
|
|
r_symndx = ELF64_R_SYM (rel->r_info);
|
5291 |
|
|
offset = rel->r_offset;
|
5292 |
|
|
addend = rel->r_addend;
|
5293 |
|
|
r = bfd_reloc_other;
|
5294 |
|
|
sym = (Elf_Internal_Sym *) 0;
|
5295 |
|
|
sec = (asection *) 0;
|
5296 |
|
|
h = (struct elf_link_hash_entry *) 0;
|
5297 |
|
|
sym_name = (const char *) 0;
|
5298 |
|
|
unresolved_reloc = false;
|
5299 |
|
|
warned = false;
|
5300 |
|
|
|
5301 |
|
|
if (r_type == R_PPC64_TOC)
|
5302 |
|
|
{
|
5303 |
|
|
/* Relocation value is TOC base. Symbol is ignored. */
|
5304 |
|
|
relocation = TOCstart + TOC_BASE_OFF;
|
5305 |
|
|
}
|
5306 |
|
|
else if (r_symndx < symtab_hdr->sh_info)
|
5307 |
|
|
{
|
5308 |
|
|
/* It's a local symbol. */
|
5309 |
|
|
sym = local_syms + r_symndx;
|
5310 |
|
|
sec = local_sections[r_symndx];
|
5311 |
|
|
sym_name = "<local symbol>";
|
5312 |
|
|
|
5313 |
|
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
|
5314 |
|
|
/* rel may have changed, update our copy of addend. */
|
5315 |
|
|
addend = rel->r_addend;
|
5316 |
|
|
|
5317 |
|
|
if (elf_section_data (sec) != NULL)
|
5318 |
|
|
{
|
5319 |
|
|
long *opd_sym_adjust;
|
5320 |
|
|
|
5321 |
|
|
opd_sym_adjust = (long *) elf_section_data (sec)->tdata;
|
5322 |
|
|
if (opd_sym_adjust != NULL && sym->st_value % 24 == 0)
|
5323 |
|
|
relocation += opd_sym_adjust[sym->st_value / 24];
|
5324 |
|
|
}
|
5325 |
|
|
}
|
5326 |
|
|
else
|
5327 |
|
|
{
|
5328 |
|
|
/* It's a global symbol. */
|
5329 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
5330 |
|
|
while (h->root.type == bfd_link_hash_indirect
|
5331 |
|
|
|| h->root.type == bfd_link_hash_warning)
|
5332 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
5333 |
|
|
sym_name = h->root.root.string;
|
5334 |
|
|
relocation = 0;
|
5335 |
|
|
if (h->root.type == bfd_link_hash_defined
|
5336 |
|
|
|| h->root.type == bfd_link_hash_defweak)
|
5337 |
|
|
{
|
5338 |
|
|
sec = h->root.u.def.section;
|
5339 |
|
|
if (sec->output_section == NULL)
|
5340 |
|
|
/* Set a flag that will be cleared later if we find a
|
5341 |
|
|
relocation value for this symbol. output_section
|
5342 |
|
|
is typically NULL for symbols satisfied by a shared
|
5343 |
|
|
library. */
|
5344 |
|
|
unresolved_reloc = true;
|
5345 |
|
|
else
|
5346 |
|
|
relocation = (h->root.u.def.value
|
5347 |
|
|
+ sec->output_section->vma
|
5348 |
|
|
+ sec->output_offset);
|
5349 |
|
|
}
|
5350 |
|
|
else if (h->root.type == bfd_link_hash_undefweak)
|
5351 |
|
|
;
|
5352 |
|
|
else if (info->shared
|
5353 |
|
|
&& (!info->symbolic || info->allow_shlib_undefined)
|
5354 |
|
|
&& !info->no_undefined
|
5355 |
|
|
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
|
5356 |
|
|
;
|
5357 |
|
|
else
|
5358 |
|
|
{
|
5359 |
|
|
if (! ((*info->callbacks->undefined_symbol)
|
5360 |
|
|
(info, h->root.root.string, input_bfd, input_section,
|
5361 |
|
|
offset, (!info->shared
|
5362 |
|
|
|| info->no_undefined
|
5363 |
|
|
|| ELF_ST_VISIBILITY (h->other)))))
|
5364 |
|
|
return false;
|
5365 |
|
|
warned = true;
|
5366 |
|
|
}
|
5367 |
|
|
}
|
5368 |
|
|
|
5369 |
|
|
/* First handle relocations that tweak non-addend part of insn. */
|
5370 |
|
|
insn = 0;
|
5371 |
|
|
switch (r_type)
|
5372 |
|
|
{
|
5373 |
|
|
default:
|
5374 |
|
|
break;
|
5375 |
|
|
|
5376 |
|
|
/* Branch taken prediction relocations. */
|
5377 |
|
|
case R_PPC64_ADDR14_BRTAKEN:
|
5378 |
|
|
case R_PPC64_REL14_BRTAKEN:
|
5379 |
|
|
insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */
|
5380 |
|
|
/* Fall thru. */
|
5381 |
|
|
|
5382 |
|
|
/* Branch not taken prediction relocations. */
|
5383 |
|
|
case R_PPC64_ADDR14_BRNTAKEN:
|
5384 |
|
|
case R_PPC64_REL14_BRNTAKEN:
|
5385 |
|
|
insn |= bfd_get_32 (output_bfd, contents + offset) & ~(0x01 << 21);
|
5386 |
|
|
if (is_power4)
|
5387 |
|
|
{
|
5388 |
|
|
/* Set 'a' bit. This is 0b00010 in BO field for branch
|
5389 |
|
|
on CR(BI) insns (BO == 001at or 011at), and 0b01000
|
5390 |
|
|
for branch on CTR insns (BO == 1a00t or 1a01t). */
|
5391 |
|
|
if ((insn & (0x14 << 21)) == (0x04 << 21))
|
5392 |
|
|
insn |= 0x02 << 21;
|
5393 |
|
|
else if ((insn & (0x14 << 21)) == (0x10 << 21))
|
5394 |
|
|
insn |= 0x08 << 21;
|
5395 |
|
|
else
|
5396 |
|
|
break;
|
5397 |
|
|
}
|
5398 |
|
|
else
|
5399 |
|
|
{
|
5400 |
|
|
from = (offset
|
5401 |
|
|
+ input_section->output_offset
|
5402 |
|
|
+ input_section->output_section->vma);
|
5403 |
|
|
|
5404 |
|
|
/* Invert 'y' bit if not the default. */
|
5405 |
|
|
if ((bfd_signed_vma) (relocation + addend - from) < 0)
|
5406 |
|
|
insn ^= 0x01 << 21;
|
5407 |
|
|
}
|
5408 |
|
|
|
5409 |
|
|
bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset);
|
5410 |
|
|
break;
|
5411 |
|
|
|
5412 |
|
|
case R_PPC64_REL24:
|
5413 |
|
|
/* A REL24 branching to a linkage function is followed by a
|
5414 |
|
|
nop. We replace the nop with a ld in order to restore
|
5415 |
|
|
the TOC base pointer. Only calls to shared objects need
|
5416 |
|
|
to alter the TOC base. These are recognized by their
|
5417 |
|
|
need for a PLT entry. */
|
5418 |
|
|
if (h != NULL
|
5419 |
|
|
&& (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL
|
5420 |
|
|
&& fdh->plt.offset != (bfd_vma) -1
|
5421 |
|
|
&& (stub_entry = ppc_get_stub_entry (input_section, sec, fdh,
|
5422 |
|
|
rel, htab)) != NULL)
|
5423 |
|
|
{
|
5424 |
|
|
boolean can_plt_call = 0;
|
5425 |
|
|
|
5426 |
|
|
if (offset + 8 <= input_section->_cooked_size)
|
5427 |
|
|
{
|
5428 |
|
|
insn = bfd_get_32 (input_bfd, contents + offset + 4);
|
5429 |
|
|
if (insn == NOP
|
5430 |
|
|
|| insn == CROR_151515 || insn == CROR_313131)
|
5431 |
|
|
{
|
5432 |
|
|
bfd_put_32 (input_bfd, (bfd_vma) LD_R2_40R1,
|
5433 |
|
|
contents + offset + 4);
|
5434 |
|
|
can_plt_call = 1;
|
5435 |
|
|
}
|
5436 |
|
|
}
|
5437 |
|
|
|
5438 |
|
|
if (!can_plt_call)
|
5439 |
|
|
{
|
5440 |
|
|
/* If this is a plain branch rather than a branch
|
5441 |
|
|
and link, don't require a nop. */
|
5442 |
|
|
insn = bfd_get_32 (input_bfd, contents + offset);
|
5443 |
|
|
if ((insn & 1) == 0)
|
5444 |
|
|
can_plt_call = 1;
|
5445 |
|
|
}
|
5446 |
|
|
|
5447 |
|
|
if (can_plt_call)
|
5448 |
|
|
{
|
5449 |
|
|
relocation = (stub_entry->stub_offset
|
5450 |
|
|
+ stub_entry->stub_sec->output_offset
|
5451 |
|
|
+ stub_entry->stub_sec->output_section->vma);
|
5452 |
|
|
addend = 0;
|
5453 |
|
|
unresolved_reloc = false;
|
5454 |
|
|
}
|
5455 |
|
|
}
|
5456 |
|
|
|
5457 |
|
|
if (h != NULL
|
5458 |
|
|
&& h->root.type == bfd_link_hash_undefweak
|
5459 |
|
|
&& relocation == 0
|
5460 |
|
|
&& addend == 0)
|
5461 |
|
|
{
|
5462 |
|
|
/* Tweak calls to undefined weak functions to point at a
|
5463 |
|
|
blr. We can thus call a weak function without first
|
5464 |
|
|
checking whether the function is defined. We have a
|
5465 |
|
|
blr at the end of .sfpr. */
|
5466 |
|
|
BFD_ASSERT (htab->sfpr->_raw_size != 0);
|
5467 |
|
|
relocation = (htab->sfpr->_raw_size - 4
|
5468 |
|
|
+ htab->sfpr->output_offset
|
5469 |
|
|
+ htab->sfpr->output_section->vma);
|
5470 |
|
|
from = (offset
|
5471 |
|
|
+ input_section->output_offset
|
5472 |
|
|
+ input_section->output_section->vma);
|
5473 |
|
|
|
5474 |
|
|
/* But let's not be silly about it. If the blr isn't in
|
5475 |
|
|
reach, just go to the next instruction. */
|
5476 |
|
|
if (relocation - from + (1 << 25) >= (1 << 26)
|
5477 |
|
|
|| htab->sfpr->_raw_size == 0)
|
5478 |
|
|
relocation = from + 4;
|
5479 |
|
|
}
|
5480 |
|
|
break;
|
5481 |
|
|
}
|
5482 |
|
|
|
5483 |
|
|
/* Set `addend'. */
|
5484 |
|
|
switch (r_type)
|
5485 |
|
|
{
|
5486 |
|
|
default:
|
5487 |
|
|
(*_bfd_error_handler)
|
5488 |
|
|
(_("%s: unknown relocation type %d for symbol %s"),
|
5489 |
|
|
bfd_archive_filename (input_bfd), (int) r_type, sym_name);
|
5490 |
|
|
|
5491 |
|
|
bfd_set_error (bfd_error_bad_value);
|
5492 |
|
|
ret = false;
|
5493 |
|
|
continue;
|
5494 |
|
|
|
5495 |
|
|
case R_PPC64_NONE:
|
5496 |
|
|
case R_PPC_GNU_VTINHERIT:
|
5497 |
|
|
case R_PPC_GNU_VTENTRY:
|
5498 |
|
|
continue;
|
5499 |
|
|
|
5500 |
|
|
/* GOT16 relocations. Like an ADDR16 using the symbol's
|
5501 |
|
|
address in the GOT as relocation value instead of the
|
5502 |
|
|
symbols value itself. Also, create a GOT entry for the
|
5503 |
|
|
symbol and put the symbol value there. */
|
5504 |
|
|
case R_PPC64_GOT16:
|
5505 |
|
|
case R_PPC64_GOT16_LO:
|
5506 |
|
|
case R_PPC64_GOT16_HI:
|
5507 |
|
|
case R_PPC64_GOT16_HA:
|
5508 |
|
|
case R_PPC64_GOT16_DS:
|
5509 |
|
|
case R_PPC64_GOT16_LO_DS:
|
5510 |
|
|
{
|
5511 |
|
|
/* Relocation is to the entry for this symbol in the global
|
5512 |
|
|
offset table. */
|
5513 |
|
|
bfd_vma off;
|
5514 |
|
|
|
5515 |
|
|
if (htab->sgot == NULL)
|
5516 |
|
|
abort ();
|
5517 |
|
|
|
5518 |
|
|
if (h != NULL)
|
5519 |
|
|
{
|
5520 |
|
|
boolean dyn;
|
5521 |
|
|
|
5522 |
|
|
off = h->got.offset;
|
5523 |
|
|
dyn = htab->elf.dynamic_sections_created;
|
5524 |
|
|
if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
|
5525 |
|
|
|| (info->shared
|
5526 |
|
|
&& (info->symbolic
|
5527 |
|
|
|| h->dynindx == -1
|
5528 |
|
|
|| (h->elf_link_hash_flags
|
5529 |
|
|
& ELF_LINK_FORCED_LOCAL))
|
5530 |
|
|
&& (h->elf_link_hash_flags
|
5531 |
|
|
& ELF_LINK_HASH_DEF_REGULAR)))
|
5532 |
|
|
{
|
5533 |
|
|
/* This is actually a static link, or it is a
|
5534 |
|
|
-Bsymbolic link and the symbol is defined
|
5535 |
|
|
locally, or the symbol was forced to be local
|
5536 |
|
|
because of a version file. We must initialize
|
5537 |
|
|
this entry in the global offset table. Since the
|
5538 |
|
|
offset must always be a multiple of 8, we use the
|
5539 |
|
|
least significant bit to record whether we have
|
5540 |
|
|
initialized it already.
|
5541 |
|
|
|
5542 |
|
|
When doing a dynamic link, we create a .rel.got
|
5543 |
|
|
relocation entry to initialize the value. This
|
5544 |
|
|
is done in the finish_dynamic_symbol routine. */
|
5545 |
|
|
if ((off & 1) != 0)
|
5546 |
|
|
off &= ~1;
|
5547 |
|
|
else
|
5548 |
|
|
{
|
5549 |
|
|
bfd_put_64 (output_bfd, relocation,
|
5550 |
|
|
htab->sgot->contents + off);
|
5551 |
|
|
h->got.offset |= 1;
|
5552 |
|
|
}
|
5553 |
|
|
}
|
5554 |
|
|
else
|
5555 |
|
|
unresolved_reloc = false;
|
5556 |
|
|
}
|
5557 |
|
|
else
|
5558 |
|
|
{
|
5559 |
|
|
if (local_got_offsets == NULL)
|
5560 |
|
|
abort ();
|
5561 |
|
|
|
5562 |
|
|
off = local_got_offsets[r_symndx];
|
5563 |
|
|
|
5564 |
|
|
/* The offset must always be a multiple of 8. We use
|
5565 |
|
|
the least significant bit to record whether we have
|
5566 |
|
|
already processed this entry. */
|
5567 |
|
|
if ((off & 1) != 0)
|
5568 |
|
|
off &= ~1;
|
5569 |
|
|
else
|
5570 |
|
|
{
|
5571 |
|
|
bfd_put_64 (output_bfd, relocation,
|
5572 |
|
|
htab->sgot->contents + off);
|
5573 |
|
|
|
5574 |
|
|
if (info->shared)
|
5575 |
|
|
{
|
5576 |
|
|
Elf_Internal_Rela outrel;
|
5577 |
|
|
Elf64_External_Rela *loc;
|
5578 |
|
|
|
5579 |
|
|
/* We need to generate a R_PPC64_RELATIVE reloc
|
5580 |
|
|
for the dynamic linker. */
|
5581 |
|
|
outrel.r_offset = (htab->sgot->output_section->vma
|
5582 |
|
|
+ htab->sgot->output_offset
|
5583 |
|
|
+ off);
|
5584 |
|
|
outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
|
5585 |
|
|
outrel.r_addend = relocation;
|
5586 |
|
|
loc = (Elf64_External_Rela *) htab->srelgot->contents;
|
5587 |
|
|
loc += htab->srelgot->reloc_count++;
|
5588 |
|
|
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
|
5589 |
|
|
}
|
5590 |
|
|
|
5591 |
|
|
local_got_offsets[r_symndx] |= 1;
|
5592 |
|
|
}
|
5593 |
|
|
}
|
5594 |
|
|
|
5595 |
|
|
if (off >= (bfd_vma) -2)
|
5596 |
|
|
abort ();
|
5597 |
|
|
|
5598 |
|
|
relocation = htab->sgot->output_offset + off;
|
5599 |
|
|
|
5600 |
|
|
/* TOC base (r2) is TOC start plus 0x8000. */
|
5601 |
|
|
addend -= TOC_BASE_OFF;
|
5602 |
|
|
}
|
5603 |
|
|
break;
|
5604 |
|
|
|
5605 |
|
|
case R_PPC64_PLT16_HA:
|
5606 |
|
|
case R_PPC64_PLT16_HI:
|
5607 |
|
|
case R_PPC64_PLT16_LO:
|
5608 |
|
|
case R_PPC64_PLT32:
|
5609 |
|
|
case R_PPC64_PLT64:
|
5610 |
|
|
/* Relocation is to the entry for this symbol in the
|
5611 |
|
|
procedure linkage table. */
|
5612 |
|
|
|
5613 |
|
|
/* Resolve a PLT reloc against a local symbol directly,
|
5614 |
|
|
without using the procedure linkage table. */
|
5615 |
|
|
if (h == NULL)
|
5616 |
|
|
break;
|
5617 |
|
|
|
5618 |
|
|
if (h->plt.offset == (bfd_vma) -1
|
5619 |
|
|
|| htab->splt == NULL)
|
5620 |
|
|
{
|
5621 |
|
|
/* We didn't make a PLT entry for this symbol. This
|
5622 |
|
|
happens when statically linking PIC code, or when
|
5623 |
|
|
using -Bsymbolic. */
|
5624 |
|
|
break;
|
5625 |
|
|
}
|
5626 |
|
|
|
5627 |
|
|
relocation = (htab->splt->output_section->vma
|
5628 |
|
|
+ htab->splt->output_offset
|
5629 |
|
|
+ h->plt.offset);
|
5630 |
|
|
unresolved_reloc = false;
|
5631 |
|
|
break;
|
5632 |
|
|
|
5633 |
|
|
/* TOC16 relocs. We want the offset relative to the TOC base,
|
5634 |
|
|
which is the address of the start of the TOC plus 0x8000.
|
5635 |
|
|
The TOC consists of sections .got, .toc, .tocbss, and .plt,
|
5636 |
|
|
in this order. */
|
5637 |
|
|
case R_PPC64_TOC16:
|
5638 |
|
|
case R_PPC64_TOC16_LO:
|
5639 |
|
|
case R_PPC64_TOC16_HI:
|
5640 |
|
|
case R_PPC64_TOC16_DS:
|
5641 |
|
|
case R_PPC64_TOC16_LO_DS:
|
5642 |
|
|
case R_PPC64_TOC16_HA:
|
5643 |
|
|
addend -= TOCstart + TOC_BASE_OFF;
|
5644 |
|
|
break;
|
5645 |
|
|
|
5646 |
|
|
/* Relocate against the beginning of the section. */
|
5647 |
|
|
case R_PPC64_SECTOFF:
|
5648 |
|
|
case R_PPC64_SECTOFF_LO:
|
5649 |
|
|
case R_PPC64_SECTOFF_HI:
|
5650 |
|
|
case R_PPC64_SECTOFF_DS:
|
5651 |
|
|
case R_PPC64_SECTOFF_LO_DS:
|
5652 |
|
|
case R_PPC64_SECTOFF_HA:
|
5653 |
|
|
if (sec != (asection *) 0)
|
5654 |
|
|
addend -= sec->output_section->vma;
|
5655 |
|
|
break;
|
5656 |
|
|
|
5657 |
|
|
case R_PPC64_REL14:
|
5658 |
|
|
case R_PPC64_REL14_BRNTAKEN:
|
5659 |
|
|
case R_PPC64_REL14_BRTAKEN:
|
5660 |
|
|
case R_PPC64_REL24:
|
5661 |
|
|
break;
|
5662 |
|
|
|
5663 |
|
|
/* Relocations that may need to be propagated if this is a
|
5664 |
|
|
dynamic object. */
|
5665 |
|
|
case R_PPC64_REL32:
|
5666 |
|
|
case R_PPC64_REL64:
|
5667 |
|
|
case R_PPC64_ADDR14:
|
5668 |
|
|
case R_PPC64_ADDR14_BRNTAKEN:
|
5669 |
|
|
case R_PPC64_ADDR14_BRTAKEN:
|
5670 |
|
|
case R_PPC64_ADDR16:
|
5671 |
|
|
case R_PPC64_ADDR16_DS:
|
5672 |
|
|
case R_PPC64_ADDR16_HA:
|
5673 |
|
|
case R_PPC64_ADDR16_HI:
|
5674 |
|
|
case R_PPC64_ADDR16_HIGHER:
|
5675 |
|
|
case R_PPC64_ADDR16_HIGHERA:
|
5676 |
|
|
case R_PPC64_ADDR16_HIGHEST:
|
5677 |
|
|
case R_PPC64_ADDR16_HIGHESTA:
|
5678 |
|
|
case R_PPC64_ADDR16_LO:
|
5679 |
|
|
case R_PPC64_ADDR16_LO_DS:
|
5680 |
|
|
case R_PPC64_ADDR24:
|
5681 |
|
|
case R_PPC64_ADDR30:
|
5682 |
|
|
case R_PPC64_ADDR32:
|
5683 |
|
|
case R_PPC64_ADDR64:
|
5684 |
|
|
case R_PPC64_UADDR16:
|
5685 |
|
|
case R_PPC64_UADDR32:
|
5686 |
|
|
case R_PPC64_UADDR64:
|
5687 |
|
|
/* r_symndx will be zero only for relocs against symbols
|
5688 |
|
|
from removed linkonce sections, or sections discarded by
|
5689 |
|
|
a linker script. */
|
5690 |
|
|
if (r_symndx == 0)
|
5691 |
|
|
break;
|
5692 |
|
|
/* Fall thru. */
|
5693 |
|
|
|
5694 |
|
|
case R_PPC64_TOC:
|
5695 |
|
|
if ((input_section->flags & SEC_ALLOC) == 0)
|
5696 |
|
|
break;
|
5697 |
|
|
|
5698 |
|
|
if (NO_OPD_RELOCS && is_opd)
|
5699 |
|
|
break;
|
5700 |
|
|
|
5701 |
|
|
if ((info->shared
|
5702 |
|
|
&& (IS_ABSOLUTE_RELOC (r_type)
|
5703 |
|
|
|| (h != NULL
|
5704 |
|
|
&& h->dynindx != -1
|
5705 |
|
|
&& (! info->symbolic
|
5706 |
|
|
|| (h->elf_link_hash_flags
|
5707 |
|
|
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|
5708 |
|
|
|| (!info->shared
|
5709 |
|
|
&& h != NULL
|
5710 |
|
|
&& h->dynindx != -1
|
5711 |
|
|
&& (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
|
5712 |
|
|
&& (((h->elf_link_hash_flags
|
5713 |
|
|
& ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
5714 |
|
|
&& (h->elf_link_hash_flags
|
5715 |
|
|
& ELF_LINK_HASH_DEF_REGULAR) == 0)
|
5716 |
|
|
|| h->root.type == bfd_link_hash_undefweak
|
5717 |
|
|
|| h->root.type == bfd_link_hash_undefined)))
|
5718 |
|
|
{
|
5719 |
|
|
Elf_Internal_Rela outrel;
|
5720 |
|
|
boolean skip, relocate;
|
5721 |
|
|
asection *sreloc;
|
5722 |
|
|
Elf64_External_Rela *loc;
|
5723 |
|
|
|
5724 |
|
|
/* When generating a dynamic object, these relocations
|
5725 |
|
|
are copied into the output file to be resolved at run
|
5726 |
|
|
time. */
|
5727 |
|
|
|
5728 |
|
|
skip = false;
|
5729 |
|
|
relocate = false;
|
5730 |
|
|
|
5731 |
|
|
outrel.r_offset =
|
5732 |
|
|
_bfd_elf_section_offset (output_bfd, info, input_section,
|
5733 |
|
|
rel->r_offset);
|
5734 |
|
|
if (outrel.r_offset == (bfd_vma) -1)
|
5735 |
|
|
skip = true;
|
5736 |
|
|
else if (outrel.r_offset == (bfd_vma) -2)
|
5737 |
|
|
skip = true, relocate = true;
|
5738 |
|
|
outrel.r_offset += (input_section->output_section->vma
|
5739 |
|
|
+ input_section->output_offset);
|
5740 |
|
|
outrel.r_addend = addend;
|
5741 |
|
|
|
5742 |
|
|
if (skip)
|
5743 |
|
|
memset (&outrel, 0, sizeof outrel);
|
5744 |
|
|
else if (h != NULL
|
5745 |
|
|
&& h->dynindx != -1
|
5746 |
|
|
&& !is_opd
|
5747 |
|
|
&& (!IS_ABSOLUTE_RELOC (r_type)
|
5748 |
|
|
|| !info->shared
|
5749 |
|
|
|| !info->symbolic
|
5750 |
|
|
|| (h->elf_link_hash_flags
|
5751 |
|
|
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
5752 |
|
|
outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
|
5753 |
|
|
else
|
5754 |
|
|
{
|
5755 |
|
|
/* This symbol is local, or marked to become local,
|
5756 |
|
|
or this is an opd section reloc which must point
|
5757 |
|
|
at a local function. */
|
5758 |
|
|
outrel.r_addend += relocation;
|
5759 |
|
|
relocate = true;
|
5760 |
|
|
if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC)
|
5761 |
|
|
{
|
5762 |
|
|
if (is_opd && h != NULL)
|
5763 |
|
|
{
|
5764 |
|
|
/* Lie about opd entries. This case occurs
|
5765 |
|
|
when building shared libraries and we
|
5766 |
|
|
reference a function in another shared
|
5767 |
|
|
lib. The same thing happens for a weak
|
5768 |
|
|
definition in an application that's
|
5769 |
|
|
overridden by a strong definition in a
|
5770 |
|
|
shared lib. (I believe this is a generic
|
5771 |
|
|
bug in binutils handling of weak syms.)
|
5772 |
|
|
In these cases we won't use the opd
|
5773 |
|
|
entry in this lib. */
|
5774 |
|
|
unresolved_reloc = false;
|
5775 |
|
|
}
|
5776 |
|
|
outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
|
5777 |
|
|
}
|
5778 |
|
|
else
|
5779 |
|
|
{
|
5780 |
|
|
long indx = 0;
|
5781 |
|
|
|
5782 |
|
|
if (bfd_is_abs_section (sec))
|
5783 |
|
|
;
|
5784 |
|
|
else if (sec == NULL || sec->owner == NULL)
|
5785 |
|
|
{
|
5786 |
|
|
bfd_set_error (bfd_error_bad_value);
|
5787 |
|
|
return false;
|
5788 |
|
|
}
|
5789 |
|
|
else
|
5790 |
|
|
{
|
5791 |
|
|
asection *osec;
|
5792 |
|
|
|
5793 |
|
|
osec = sec->output_section;
|
5794 |
|
|
indx = elf_section_data (osec)->dynindx;
|
5795 |
|
|
|
5796 |
|
|
/* We are turning this relocation into one
|
5797 |
|
|
against a section symbol, so subtract out
|
5798 |
|
|
the output section's address but not the
|
5799 |
|
|
offset of the input section in the output
|
5800 |
|
|
section. */
|
5801 |
|
|
outrel.r_addend -= osec->vma;
|
5802 |
|
|
}
|
5803 |
|
|
|
5804 |
|
|
outrel.r_info = ELF64_R_INFO (indx, r_type);
|
5805 |
|
|
}
|
5806 |
|
|
}
|
5807 |
|
|
|
5808 |
|
|
sreloc = elf_section_data (input_section)->sreloc;
|
5809 |
|
|
if (sreloc == NULL)
|
5810 |
|
|
abort ();
|
5811 |
|
|
|
5812 |
|
|
loc = (Elf64_External_Rela *) sreloc->contents;
|
5813 |
|
|
loc += sreloc->reloc_count++;
|
5814 |
|
|
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
|
5815 |
|
|
|
5816 |
|
|
/* If this reloc is against an external symbol, it will
|
5817 |
|
|
be computed at runtime, so there's no need to do
|
5818 |
|
|
anything now. */
|
5819 |
|
|
if (! relocate)
|
5820 |
|
|
continue;
|
5821 |
|
|
}
|
5822 |
|
|
break;
|
5823 |
|
|
|
5824 |
|
|
case R_PPC64_COPY:
|
5825 |
|
|
case R_PPC64_GLOB_DAT:
|
5826 |
|
|
case R_PPC64_JMP_SLOT:
|
5827 |
|
|
case R_PPC64_RELATIVE:
|
5828 |
|
|
/* We shouldn't ever see these dynamic relocs in relocatable
|
5829 |
|
|
files. */
|
5830 |
|
|
/* Fall thru */
|
5831 |
|
|
|
5832 |
|
|
case R_PPC64_PLTGOT16:
|
5833 |
|
|
case R_PPC64_PLTGOT16_DS:
|
5834 |
|
|
case R_PPC64_PLTGOT16_HA:
|
5835 |
|
|
case R_PPC64_PLTGOT16_HI:
|
5836 |
|
|
case R_PPC64_PLTGOT16_LO:
|
5837 |
|
|
case R_PPC64_PLTGOT16_LO_DS:
|
5838 |
|
|
case R_PPC64_PLTREL32:
|
5839 |
|
|
case R_PPC64_PLTREL64:
|
5840 |
|
|
/* These ones haven't been implemented yet. */
|
5841 |
|
|
|
5842 |
|
|
(*_bfd_error_handler)
|
5843 |
|
|
(_("%s: Relocation %s is not supported for symbol %s."),
|
5844 |
|
|
bfd_archive_filename (input_bfd),
|
5845 |
|
|
ppc64_elf_howto_table[(int) r_type]->name, sym_name);
|
5846 |
|
|
|
5847 |
|
|
bfd_set_error (bfd_error_invalid_operation);
|
5848 |
|
|
ret = false;
|
5849 |
|
|
continue;
|
5850 |
|
|
}
|
5851 |
|
|
|
5852 |
|
|
/* Do any further special processing. */
|
5853 |
|
|
switch (r_type)
|
5854 |
|
|
{
|
5855 |
|
|
default:
|
5856 |
|
|
break;
|
5857 |
|
|
|
5858 |
|
|
case R_PPC64_ADDR16_HA:
|
5859 |
|
|
case R_PPC64_ADDR16_HIGHERA:
|
5860 |
|
|
case R_PPC64_ADDR16_HIGHESTA:
|
5861 |
|
|
case R_PPC64_PLT16_HA:
|
5862 |
|
|
case R_PPC64_TOC16_HA:
|
5863 |
|
|
case R_PPC64_SECTOFF_HA:
|
5864 |
|
|
/* It's just possible that this symbol is a weak symbol
|
5865 |
|
|
that's not actually defined anywhere. In that case,
|
5866 |
|
|
'sec' would be NULL, and we should leave the symbol
|
5867 |
|
|
alone (it will be set to zero elsewhere in the link). */
|
5868 |
|
|
if (sec != NULL)
|
5869 |
|
|
/* Add 0x10000 if sign bit in 0:15 is set. */
|
5870 |
|
|
addend += ((relocation + addend) & 0x8000) << 1;
|
5871 |
|
|
break;
|
5872 |
|
|
|
5873 |
|
|
case R_PPC64_ADDR16_DS:
|
5874 |
|
|
case R_PPC64_ADDR16_LO_DS:
|
5875 |
|
|
case R_PPC64_GOT16_DS:
|
5876 |
|
|
case R_PPC64_GOT16_LO_DS:
|
5877 |
|
|
case R_PPC64_PLT16_LO_DS:
|
5878 |
|
|
case R_PPC64_SECTOFF_DS:
|
5879 |
|
|
case R_PPC64_SECTOFF_LO_DS:
|
5880 |
|
|
case R_PPC64_TOC16_DS:
|
5881 |
|
|
case R_PPC64_TOC16_LO_DS:
|
5882 |
|
|
case R_PPC64_PLTGOT16_DS:
|
5883 |
|
|
case R_PPC64_PLTGOT16_LO_DS:
|
5884 |
|
|
if (((relocation + addend) & 3) != 0)
|
5885 |
|
|
{
|
5886 |
|
|
(*_bfd_error_handler)
|
5887 |
|
|
(_("%s: error: relocation %s not a multiple of 4"),
|
5888 |
|
|
bfd_archive_filename (input_bfd),
|
5889 |
|
|
ppc64_elf_howto_table[(int) r_type]->name);
|
5890 |
|
|
bfd_set_error (bfd_error_bad_value);
|
5891 |
|
|
ret = false;
|
5892 |
|
|
continue;
|
5893 |
|
|
}
|
5894 |
|
|
break;
|
5895 |
|
|
|
5896 |
|
|
case R_PPC64_REL14:
|
5897 |
|
|
case R_PPC64_REL14_BRNTAKEN:
|
5898 |
|
|
case R_PPC64_REL14_BRTAKEN:
|
5899 |
|
|
max_br_offset = 1 << 15;
|
5900 |
|
|
goto branch_check;
|
5901 |
|
|
|
5902 |
|
|
case R_PPC64_REL24:
|
5903 |
|
|
max_br_offset = 1 << 25;
|
5904 |
|
|
|
5905 |
|
|
branch_check:
|
5906 |
|
|
/* If the branch is out of reach, then redirect the
|
5907 |
|
|
call to the local stub for this function. */
|
5908 |
|
|
from = (offset
|
5909 |
|
|
+ input_section->output_offset
|
5910 |
|
|
+ input_section->output_section->vma);
|
5911 |
|
|
if (relocation + addend - from + max_br_offset >= 2 * max_br_offset
|
5912 |
|
|
&& (stub_entry = ppc_get_stub_entry (input_section, sec, h,
|
5913 |
|
|
rel, htab)) != NULL)
|
5914 |
|
|
{
|
5915 |
|
|
/* Munge up the value and addend so that we call the stub
|
5916 |
|
|
rather than the procedure directly. */
|
5917 |
|
|
relocation = (stub_entry->stub_offset
|
5918 |
|
|
+ stub_entry->stub_sec->output_offset
|
5919 |
|
|
+ stub_entry->stub_sec->output_section->vma);
|
5920 |
|
|
addend = 0;
|
5921 |
|
|
}
|
5922 |
|
|
break;
|
5923 |
|
|
}
|
5924 |
|
|
|
5925 |
|
|
/* Dynamic relocs are not propagated for SEC_DEBUGGING sections
|
5926 |
|
|
because such sections are not SEC_ALLOC and thus ld.so will
|
5927 |
|
|
not process them. */
|
5928 |
|
|
if (unresolved_reloc
|
5929 |
|
|
&& !((input_section->flags & SEC_DEBUGGING) != 0
|
5930 |
|
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
|
5931 |
|
|
{
|
5932 |
|
|
(*_bfd_error_handler)
|
5933 |
|
|
(_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
|
5934 |
|
|
bfd_archive_filename (input_bfd),
|
5935 |
|
|
bfd_get_section_name (input_bfd, input_section),
|
5936 |
|
|
(long) rel->r_offset,
|
5937 |
|
|
h->root.root.string);
|
5938 |
|
|
ret = false;
|
5939 |
|
|
}
|
5940 |
|
|
|
5941 |
|
|
r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
|
5942 |
|
|
input_bfd,
|
5943 |
|
|
input_section,
|
5944 |
|
|
contents,
|
5945 |
|
|
offset,
|
5946 |
|
|
relocation,
|
5947 |
|
|
addend);
|
5948 |
|
|
|
5949 |
|
|
if (r != bfd_reloc_ok)
|
5950 |
|
|
{
|
5951 |
|
|
const char *name;
|
5952 |
|
|
|
5953 |
|
|
if (h != NULL)
|
5954 |
|
|
{
|
5955 |
|
|
if (h->root.type == bfd_link_hash_undefweak
|
5956 |
|
|
&& ppc64_elf_howto_table[(int) r_type]->pc_relative)
|
5957 |
|
|
{
|
5958 |
|
|
/* Assume this is a call protected by other code that
|
5959 |
|
|
detects the symbol is undefined. If this is the case,
|
5960 |
|
|
we can safely ignore the overflow. If not, the
|
5961 |
|
|
program is hosed anyway, and a little warning isn't
|
5962 |
|
|
going to help. */
|
5963 |
|
|
|
5964 |
|
|
continue;
|
5965 |
|
|
}
|
5966 |
|
|
|
5967 |
|
|
name = h->root.root.string;
|
5968 |
|
|
}
|
5969 |
|
|
else
|
5970 |
|
|
{
|
5971 |
|
|
name = bfd_elf_string_from_elf_section (input_bfd,
|
5972 |
|
|
symtab_hdr->sh_link,
|
5973 |
|
|
sym->st_name);
|
5974 |
|
|
if (name == NULL)
|
5975 |
|
|
continue;
|
5976 |
|
|
if (*name == '\0')
|
5977 |
|
|
name = bfd_section_name (input_bfd, sec);
|
5978 |
|
|
}
|
5979 |
|
|
|
5980 |
|
|
if (r == bfd_reloc_overflow)
|
5981 |
|
|
{
|
5982 |
|
|
if (warned)
|
5983 |
|
|
continue;
|
5984 |
|
|
if (!((*info->callbacks->reloc_overflow)
|
5985 |
|
|
(info, name, ppc64_elf_howto_table[(int) r_type]->name,
|
5986 |
|
|
rel->r_addend, input_bfd, input_section, offset)))
|
5987 |
|
|
return false;
|
5988 |
|
|
}
|
5989 |
|
|
else
|
5990 |
|
|
{
|
5991 |
|
|
(*_bfd_error_handler)
|
5992 |
|
|
(_("%s(%s+0x%lx): reloc against `%s': error %d"),
|
5993 |
|
|
bfd_archive_filename (input_bfd),
|
5994 |
|
|
bfd_get_section_name (input_bfd, input_section),
|
5995 |
|
|
(long) rel->r_offset, name, (int) r);
|
5996 |
|
|
ret = false;
|
5997 |
|
|
}
|
5998 |
|
|
}
|
5999 |
|
|
}
|
6000 |
|
|
|
6001 |
|
|
return ret;
|
6002 |
|
|
}
|
6003 |
|
|
|
6004 |
|
|
/* Finish up dynamic symbol handling. We set the contents of various
|
6005 |
|
|
dynamic sections here. */
|
6006 |
|
|
|
6007 |
|
|
static boolean
|
6008 |
|
|
ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
|
6009 |
|
|
bfd *output_bfd;
|
6010 |
|
|
struct bfd_link_info *info;
|
6011 |
|
|
struct elf_link_hash_entry *h;
|
6012 |
|
|
Elf_Internal_Sym *sym;
|
6013 |
|
|
{
|
6014 |
|
|
struct ppc_link_hash_table *htab;
|
6015 |
|
|
bfd *dynobj;
|
6016 |
|
|
|
6017 |
|
|
htab = ppc_hash_table (info);
|
6018 |
|
|
dynobj = htab->elf.dynobj;
|
6019 |
|
|
|
6020 |
|
|
if (h->plt.offset != (bfd_vma) -1
|
6021 |
|
|
&& ((struct ppc_link_hash_entry *) h)->is_func_descriptor)
|
6022 |
|
|
{
|
6023 |
|
|
Elf_Internal_Rela rela;
|
6024 |
|
|
Elf64_External_Rela *loc;
|
6025 |
|
|
|
6026 |
|
|
/* This symbol has an entry in the procedure linkage table. Set
|
6027 |
|
|
it up. */
|
6028 |
|
|
|
6029 |
|
|
if (htab->splt == NULL
|
6030 |
|
|
|| htab->srelplt == NULL
|
6031 |
|
|
|| htab->sglink == NULL)
|
6032 |
|
|
abort ();
|
6033 |
|
|
|
6034 |
|
|
/* Create a JMP_SLOT reloc to inform the dynamic linker to
|
6035 |
|
|
fill in the PLT entry. */
|
6036 |
|
|
|
6037 |
|
|
rela.r_offset = (htab->splt->output_section->vma
|
6038 |
|
|
+ htab->splt->output_offset
|
6039 |
|
|
+ h->plt.offset);
|
6040 |
|
|
rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT);
|
6041 |
|
|
rela.r_addend = 0;
|
6042 |
|
|
|
6043 |
|
|
loc = (Elf64_External_Rela *) htab->srelplt->contents;
|
6044 |
|
|
loc += (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
|
6045 |
|
|
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
|
6046 |
|
|
}
|
6047 |
|
|
|
6048 |
|
|
if (h->got.offset != (bfd_vma) -1)
|
6049 |
|
|
{
|
6050 |
|
|
Elf_Internal_Rela rela;
|
6051 |
|
|
Elf64_External_Rela *loc;
|
6052 |
|
|
|
6053 |
|
|
/* This symbol has an entry in the global offset table. Set it
|
6054 |
|
|
up. */
|
6055 |
|
|
|
6056 |
|
|
if (htab->sgot == NULL || htab->srelgot == NULL)
|
6057 |
|
|
abort ();
|
6058 |
|
|
|
6059 |
|
|
rela.r_offset = (htab->sgot->output_section->vma
|
6060 |
|
|
+ htab->sgot->output_offset
|
6061 |
|
|
+ (h->got.offset &~ (bfd_vma) 1));
|
6062 |
|
|
|
6063 |
|
|
/* If this is a static link, or it is a -Bsymbolic link and the
|
6064 |
|
|
symbol is defined locally or was forced to be local because
|
6065 |
|
|
of a version file, we just want to emit a RELATIVE reloc.
|
6066 |
|
|
The entry in the global offset table will already have been
|
6067 |
|
|
initialized in the relocate_section function. */
|
6068 |
|
|
if (info->shared
|
6069 |
|
|
&& (info->symbolic
|
6070 |
|
|
|| h->dynindx == -1
|
6071 |
|
|
|| (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
|
6072 |
|
|
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
|
6073 |
|
|
{
|
6074 |
|
|
BFD_ASSERT((h->got.offset & 1) != 0);
|
6075 |
|
|
rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
|
6076 |
|
|
rela.r_addend = (h->root.u.def.value
|
6077 |
|
|
+ h->root.u.def.section->output_section->vma
|
6078 |
|
|
+ h->root.u.def.section->output_offset);
|
6079 |
|
|
}
|
6080 |
|
|
else
|
6081 |
|
|
{
|
6082 |
|
|
BFD_ASSERT ((h->got.offset & 1) == 0);
|
6083 |
|
|
bfd_put_64 (output_bfd, (bfd_vma) 0,
|
6084 |
|
|
htab->sgot->contents + h->got.offset);
|
6085 |
|
|
rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_GLOB_DAT);
|
6086 |
|
|
rela.r_addend = 0;
|
6087 |
|
|
}
|
6088 |
|
|
|
6089 |
|
|
loc = (Elf64_External_Rela *) htab->srelgot->contents;
|
6090 |
|
|
loc += htab->srelgot->reloc_count++;
|
6091 |
|
|
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
|
6092 |
|
|
}
|
6093 |
|
|
|
6094 |
|
|
if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
|
6095 |
|
|
{
|
6096 |
|
|
Elf_Internal_Rela rela;
|
6097 |
|
|
Elf64_External_Rela *loc;
|
6098 |
|
|
|
6099 |
|
|
/* This symbol needs a copy reloc. Set it up. */
|
6100 |
|
|
|
6101 |
|
|
if (h->dynindx == -1
|
6102 |
|
|
|| (h->root.type != bfd_link_hash_defined
|
6103 |
|
|
&& h->root.type != bfd_link_hash_defweak)
|
6104 |
|
|
|| htab->srelbss == NULL)
|
6105 |
|
|
abort ();
|
6106 |
|
|
|
6107 |
|
|
rela.r_offset = (h->root.u.def.value
|
6108 |
|
|
+ h->root.u.def.section->output_section->vma
|
6109 |
|
|
+ h->root.u.def.section->output_offset);
|
6110 |
|
|
rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY);
|
6111 |
|
|
rela.r_addend = 0;
|
6112 |
|
|
loc = (Elf64_External_Rela *) htab->srelbss->contents;
|
6113 |
|
|
loc += htab->srelbss->reloc_count++;
|
6114 |
|
|
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
|
6115 |
|
|
}
|
6116 |
|
|
|
6117 |
|
|
/* Mark some specially defined symbols as absolute. */
|
6118 |
|
|
if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
|
6119 |
|
|
sym->st_shndx = SHN_ABS;
|
6120 |
|
|
|
6121 |
|
|
return true;
|
6122 |
|
|
}
|
6123 |
|
|
|
6124 |
|
|
/* Used to decide how to sort relocs in an optimal manner for the
|
6125 |
|
|
dynamic linker, before writing them out. */
|
6126 |
|
|
|
6127 |
|
|
static enum elf_reloc_type_class
|
6128 |
|
|
ppc64_elf_reloc_type_class (rela)
|
6129 |
|
|
const Elf_Internal_Rela *rela;
|
6130 |
|
|
{
|
6131 |
|
|
enum elf_ppc_reloc_type r_type;
|
6132 |
|
|
|
6133 |
|
|
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rela->r_info);
|
6134 |
|
|
switch (r_type)
|
6135 |
|
|
{
|
6136 |
|
|
case R_PPC64_RELATIVE:
|
6137 |
|
|
return reloc_class_relative;
|
6138 |
|
|
case R_PPC64_JMP_SLOT:
|
6139 |
|
|
return reloc_class_plt;
|
6140 |
|
|
case R_PPC64_COPY:
|
6141 |
|
|
return reloc_class_copy;
|
6142 |
|
|
default:
|
6143 |
|
|
return reloc_class_normal;
|
6144 |
|
|
}
|
6145 |
|
|
}
|
6146 |
|
|
|
6147 |
|
|
/* Finish up the dynamic sections. */
|
6148 |
|
|
|
6149 |
|
|
static boolean
|
6150 |
|
|
ppc64_elf_finish_dynamic_sections (output_bfd, info)
|
6151 |
|
|
bfd *output_bfd;
|
6152 |
|
|
struct bfd_link_info *info;
|
6153 |
|
|
{
|
6154 |
|
|
struct ppc_link_hash_table *htab;
|
6155 |
|
|
bfd *dynobj;
|
6156 |
|
|
asection *sdyn;
|
6157 |
|
|
|
6158 |
|
|
htab = ppc_hash_table (info);
|
6159 |
|
|
dynobj = htab->elf.dynobj;
|
6160 |
|
|
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
6161 |
|
|
|
6162 |
|
|
if (htab->elf.dynamic_sections_created)
|
6163 |
|
|
{
|
6164 |
|
|
Elf64_External_Dyn *dyncon, *dynconend;
|
6165 |
|
|
|
6166 |
|
|
if (sdyn == NULL || htab->sgot == NULL)
|
6167 |
|
|
abort ();
|
6168 |
|
|
|
6169 |
|
|
dyncon = (Elf64_External_Dyn *) sdyn->contents;
|
6170 |
|
|
dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
|
6171 |
|
|
for (; dyncon < dynconend; dyncon++)
|
6172 |
|
|
{
|
6173 |
|
|
Elf_Internal_Dyn dyn;
|
6174 |
|
|
asection *s;
|
6175 |
|
|
|
6176 |
|
|
bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
|
6177 |
|
|
|
6178 |
|
|
switch (dyn.d_tag)
|
6179 |
|
|
{
|
6180 |
|
|
default:
|
6181 |
|
|
continue;
|
6182 |
|
|
|
6183 |
|
|
case DT_PPC64_GLINK:
|
6184 |
|
|
dyn.d_un.d_ptr = (htab->sglink->output_section->vma
|
6185 |
|
|
+ htab->sglink->output_offset);
|
6186 |
|
|
break;
|
6187 |
|
|
|
6188 |
|
|
case DT_PPC64_OPD:
|
6189 |
|
|
s = bfd_get_section_by_name (output_bfd, ".opd");
|
6190 |
|
|
if (s != NULL)
|
6191 |
|
|
dyn.d_un.d_ptr = s->vma;
|
6192 |
|
|
break;
|
6193 |
|
|
|
6194 |
|
|
case DT_PPC64_OPDSZ:
|
6195 |
|
|
s = bfd_get_section_by_name (output_bfd, ".opd");
|
6196 |
|
|
if (s != NULL)
|
6197 |
|
|
dyn.d_un.d_val = s->_raw_size;
|
6198 |
|
|
break;
|
6199 |
|
|
|
6200 |
|
|
case DT_PLTGOT:
|
6201 |
|
|
dyn.d_un.d_ptr = (htab->splt->output_section->vma
|
6202 |
|
|
+ htab->splt->output_offset);
|
6203 |
|
|
break;
|
6204 |
|
|
|
6205 |
|
|
case DT_JMPREL:
|
6206 |
|
|
dyn.d_un.d_ptr = (htab->srelplt->output_section->vma
|
6207 |
|
|
+ htab->srelplt->output_offset);
|
6208 |
|
|
break;
|
6209 |
|
|
|
6210 |
|
|
case DT_PLTRELSZ:
|
6211 |
|
|
dyn.d_un.d_val = htab->srelplt->_raw_size;
|
6212 |
|
|
break;
|
6213 |
|
|
|
6214 |
|
|
case DT_RELASZ:
|
6215 |
|
|
/* Don't count procedure linkage table relocs in the
|
6216 |
|
|
overall reloc count. */
|
6217 |
|
|
if (htab->srelplt != NULL)
|
6218 |
|
|
dyn.d_un.d_val -= htab->srelplt->_raw_size;
|
6219 |
|
|
break;
|
6220 |
|
|
}
|
6221 |
|
|
|
6222 |
|
|
bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
|
6223 |
|
|
}
|
6224 |
|
|
}
|
6225 |
|
|
|
6226 |
|
|
if (htab->sgot != NULL && htab->sgot->_raw_size != 0)
|
6227 |
|
|
{
|
6228 |
|
|
/* Fill in the first entry in the global offset table.
|
6229 |
|
|
We use it to hold the link-time TOCbase. */
|
6230 |
|
|
bfd_put_64 (output_bfd,
|
6231 |
|
|
elf_gp (output_bfd) + TOC_BASE_OFF,
|
6232 |
|
|
htab->sgot->contents);
|
6233 |
|
|
|
6234 |
|
|
/* Set .got entry size. */
|
6235 |
|
|
elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8;
|
6236 |
|
|
}
|
6237 |
|
|
|
6238 |
|
|
if (htab->splt != NULL && htab->splt->_raw_size != 0)
|
6239 |
|
|
{
|
6240 |
|
|
/* Set .plt entry size. */
|
6241 |
|
|
elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize
|
6242 |
|
|
= PLT_ENTRY_SIZE;
|
6243 |
|
|
}
|
6244 |
|
|
|
6245 |
|
|
return true;
|
6246 |
|
|
}
|
6247 |
|
|
|
6248 |
|
|
#define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
|
6249 |
|
|
#define TARGET_LITTLE_NAME "elf64-powerpcle"
|
6250 |
|
|
#define TARGET_BIG_SYM bfd_elf64_powerpc_vec
|
6251 |
|
|
#define TARGET_BIG_NAME "elf64-powerpc"
|
6252 |
|
|
#define ELF_ARCH bfd_arch_powerpc
|
6253 |
|
|
#define ELF_MACHINE_CODE EM_PPC64
|
6254 |
|
|
#define ELF_MAXPAGESIZE 0x10000
|
6255 |
|
|
#define elf_info_to_howto ppc64_elf_info_to_howto
|
6256 |
|
|
|
6257 |
|
|
#ifdef EM_CYGNUS_POWERPC
|
6258 |
|
|
#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
|
6259 |
|
|
#endif
|
6260 |
|
|
|
6261 |
|
|
#ifdef EM_PPC_OLD
|
6262 |
|
|
#define ELF_MACHINE_ALT2 EM_PPC_OLD
|
6263 |
|
|
#endif
|
6264 |
|
|
|
6265 |
|
|
#define elf_backend_want_got_sym 0
|
6266 |
|
|
#define elf_backend_want_plt_sym 0
|
6267 |
|
|
#define elf_backend_plt_alignment 3
|
6268 |
|
|
#define elf_backend_plt_not_loaded 1
|
6269 |
|
|
#define elf_backend_got_symbol_offset 0
|
6270 |
|
|
#define elf_backend_got_header_size 8
|
6271 |
|
|
#define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
|
6272 |
|
|
#define elf_backend_can_gc_sections 1
|
6273 |
|
|
#define elf_backend_can_refcount 1
|
6274 |
|
|
#define elf_backend_rela_normal 1
|
6275 |
|
|
|
6276 |
|
|
#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup
|
6277 |
|
|
#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data
|
6278 |
|
|
#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create
|
6279 |
|
|
#define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free
|
6280 |
|
|
|
6281 |
|
|
#define elf_backend_object_p ppc64_elf_object_p
|
6282 |
|
|
#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
|
6283 |
|
|
#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
|
6284 |
|
|
#define elf_backend_check_relocs ppc64_elf_check_relocs
|
6285 |
|
|
#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook
|
6286 |
|
|
#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook
|
6287 |
|
|
#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
|
6288 |
|
|
#define elf_backend_hide_symbol ppc64_elf_hide_symbol
|
6289 |
|
|
#define elf_backend_always_size_sections ppc64_elf_func_desc_adjust
|
6290 |
|
|
#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
|
6291 |
|
|
#define elf_backend_relocate_section ppc64_elf_relocate_section
|
6292 |
|
|
#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
|
6293 |
|
|
#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
|
6294 |
|
|
#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
|
6295 |
|
|
|
6296 |
|
|
#include "elf64-target.h"
|