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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [bfd/] [elf32-tilepro.c] - Rev 166
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/* TILEPro-specific support for 32-bit ELF. Copyright 2011 Free Software Foundation, Inc. This file is part of BFD, the Binary File Descriptor library. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #include "bfd.h" #include "sysdep.h" #include "libbfd.h" #include "elf-bfd.h" #include "elf/tilepro.h" #include "opcode/tilepro.h" #include "libiberty.h" #include "elf32-tilepro.h" #define TILEPRO_BYTES_PER_WORD 4 static reloc_howto_type tilepro_elf_howto_table [] = { /* This reloc does nothing. */ HOWTO (R_TILEPRO_NONE, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_NONE", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ FALSE), /* pcrel_offset */ /* A 32 bit absolute relocation. */ HOWTO (R_TILEPRO_32, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_32", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0xffffffff, /* dst_mask */ FALSE), /* pcrel_offset */ /* A 16 bit absolute relocation. */ HOWTO (R_TILEPRO_16, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_16", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0xffff, /* dst_mask */ FALSE), /* pcrel_offset */ /* An 8 bit absolute relocation. */ HOWTO (R_TILEPRO_8, /* type */ 0, /* rightshift */ 0, /* size (0 = byte, 1 = short, 2 = long) */ 8, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_unsigned, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_8", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0xff, /* dst_mask */ FALSE), /* pcrel_offset */ /* A 32 bit pc-relative relocation. */ HOWTO (R_TILEPRO_32_PCREL,/* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_32_PCREL", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0xffffffff, /* dst_mask */ TRUE), /* pcrel_offset */ /* A 16 bit pc-relative relocation. */ HOWTO (R_TILEPRO_16_PCREL,/* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_16_PCREL", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0xffff, /* dst_mask */ TRUE), /* pcrel_offset */ /* An 8 bit pc-relative relocation. */ HOWTO (R_TILEPRO_8_PCREL, /* type */ 0, /* rightshift */ 0, /* size (0 = byte, 1 = short, 2 = long) */ 8, /* bitsize */ TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_8_PCREL",/* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0xff, /* dst_mask */ TRUE), /* pcrel_offset */ /* A 16 bit relocation without overflow. */ HOWTO (R_TILEPRO_LO16, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont,/* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_LO16", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0xffff, /* dst_mask */ FALSE), /* pcrel_offset */ /* The high order 16 bits of an address. */ HOWTO (R_TILEPRO_HI16, /* type */ 16, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_HI16", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0xffff, /* dst_mask */ FALSE), /* pcrel_offset */ /* The high order 16 bits of an address, plus 1 if the contents of the low 16 bits, treated as a signed number, is negative. */ HOWTO (R_TILEPRO_HA16, /* type */ 16, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_HA16", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0xffff, /* dst_mask */ FALSE), /* pcrel_offset */ HOWTO (R_TILEPRO_COPY, /* type */ 0, /* rightshift */ 0, /* size (0 = byte, 1 = short, 2 = long) */ 0, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_COPY", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ TRUE), /* pcrel_offset */ HOWTO (R_TILEPRO_GLOB_DAT, /* type */ 0, /* rightshift */ 0, /* size (0 = byte, 1 = short, 2 = long) */ 0, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_GLOB_DAT", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ TRUE), /* pcrel_offset */ HOWTO (R_TILEPRO_JMP_SLOT, /* type */ 0, /* rightshift */ 0, /* size (0 = byte, 1 = short, 2 = long) */ 0, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_JMP_SLOT", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ TRUE), /* pcrel_offset */ HOWTO (R_TILEPRO_RELATIVE, /* type */ 0, /* rightshift */ 0, /* size (0 = byte, 1 = short, 2 = long) */ 0, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_RELATIVE", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ TRUE), /* pcrel_offset */ HOWTO (R_TILEPRO_BROFF_X1, /* type */ TILEPRO_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 17, /* bitsize */ TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_BROFF_X1", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ -1, /* dst_mask */ TRUE), /* pcrel_offset */ HOWTO (R_TILEPRO_JOFFLONG_X1, /* type */ TILEPRO_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 29, /* bitsize */ TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed,/* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_JOFFLONG_X1", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ -1, /* dst_mask */ TRUE), /* pcrel_offset */ HOWTO (R_TILEPRO_JOFFLONG_X1_PLT, /* type */ TILEPRO_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 29, /* bitsize */ TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed,/* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_JOFFLONG_X1_PLT", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ -1, /* dst_mask */ TRUE), /* pcrel_offset */ #define TILEPRO_IMM_HOWTO(name, size, bitsize) \ HOWTO (name, 0, size, bitsize, FALSE, 0, \ complain_overflow_signed, bfd_elf_generic_reloc, \ #name, FALSE, 0, -1, FALSE) #define TILEPRO_UIMM_HOWTO(name, size, bitsize) \ HOWTO (name, 0, size, bitsize, FALSE, 0, \ complain_overflow_unsigned, bfd_elf_generic_reloc, \ #name, FALSE, 0, -1, FALSE) TILEPRO_IMM_HOWTO(R_TILEPRO_IMM8_X0, 0, 8), TILEPRO_IMM_HOWTO(R_TILEPRO_IMM8_Y0, 0, 8), TILEPRO_IMM_HOWTO(R_TILEPRO_IMM8_X1, 0, 8), TILEPRO_IMM_HOWTO(R_TILEPRO_IMM8_Y1, 0, 8), TILEPRO_UIMM_HOWTO(R_TILEPRO_MT_IMM15_X1, 1, 15), TILEPRO_UIMM_HOWTO(R_TILEPRO_MF_IMM15_X1, 1, 15), TILEPRO_IMM_HOWTO(R_TILEPRO_IMM16_X0, 1, 16), TILEPRO_IMM_HOWTO(R_TILEPRO_IMM16_X1, 1, 16), #define TILEPRO_IMM16_HOWTO(name, rshift) \ HOWTO (name, rshift, 1, 16, FALSE, 0, \ complain_overflow_dont, bfd_elf_generic_reloc, \ #name, FALSE, 0, 0xffff, FALSE) TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_LO, 0), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_LO, 0), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_HI, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_HI, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_HA, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_HA, 16), /* PC-relative offsets. */ HOWTO (R_TILEPRO_IMM16_X0_PCREL, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_IMM16_X0_PCREL",/* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ -1, /* dst_mask */ TRUE), /* pcrel_offset */ HOWTO (R_TILEPRO_IMM16_X1_PCREL, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_IMM16_X1_PCREL",/* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ -1, /* dst_mask */ TRUE), /* pcrel_offset */ #define TILEPRO_IMM16_HOWTO_PCREL(name, rshift) \ HOWTO (name, rshift, 1, 16, TRUE, 0, \ complain_overflow_dont, bfd_elf_generic_reloc, \ #name, FALSE, 0, 0xffff, TRUE) TILEPRO_IMM16_HOWTO_PCREL (R_TILEPRO_IMM16_X0_LO_PCREL, 0), TILEPRO_IMM16_HOWTO_PCREL (R_TILEPRO_IMM16_X1_LO_PCREL, 0), TILEPRO_IMM16_HOWTO_PCREL (R_TILEPRO_IMM16_X0_HI_PCREL, 16), TILEPRO_IMM16_HOWTO_PCREL (R_TILEPRO_IMM16_X1_HI_PCREL, 16), TILEPRO_IMM16_HOWTO_PCREL (R_TILEPRO_IMM16_X0_HA_PCREL, 16), TILEPRO_IMM16_HOWTO_PCREL (R_TILEPRO_IMM16_X1_HA_PCREL, 16), /* Byte offset into GOT for a particular symbol. */ TILEPRO_IMM_HOWTO(R_TILEPRO_IMM16_X0_GOT, 1, 16), TILEPRO_IMM_HOWTO(R_TILEPRO_IMM16_X1_GOT, 1, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_GOT_LO, 0), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_GOT_LO, 0), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_GOT_HI, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_GOT_HI, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_GOT_HA, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_GOT_HA, 16), TILEPRO_UIMM_HOWTO(R_TILEPRO_MMSTART_X0, 0, 5), TILEPRO_UIMM_HOWTO(R_TILEPRO_MMEND_X0, 0, 5), TILEPRO_UIMM_HOWTO(R_TILEPRO_MMSTART_X1, 0, 5), TILEPRO_UIMM_HOWTO(R_TILEPRO_MMEND_X1, 0, 5), TILEPRO_UIMM_HOWTO(R_TILEPRO_SHAMT_X0, 0, 5), TILEPRO_UIMM_HOWTO(R_TILEPRO_SHAMT_X1, 0, 5), TILEPRO_UIMM_HOWTO(R_TILEPRO_SHAMT_Y0, 0, 5), TILEPRO_UIMM_HOWTO(R_TILEPRO_SHAMT_Y1, 0, 5), TILEPRO_IMM_HOWTO(R_TILEPRO_DEST_IMM8_X1, 0, 8), /* These relocs are currently not defined. */ EMPTY_HOWTO (56), EMPTY_HOWTO (57), EMPTY_HOWTO (58), EMPTY_HOWTO (59), HOWTO (R_TILEPRO_TLS_GD_CALL, /* type */ TILEPRO_LOG2_BUNDLE_ALIGNMENT_IN_BYTES, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 29, /* bitsize */ TRUE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed,/* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_TLS_GD_CALL", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ -1, /* dst_mask */ TRUE), /* pcrel_offset */ TILEPRO_IMM_HOWTO(R_TILEPRO_IMM8_X0_TLS_GD_ADD, 0, 8), TILEPRO_IMM_HOWTO(R_TILEPRO_IMM8_X1_TLS_GD_ADD, 0, 8), TILEPRO_IMM_HOWTO(R_TILEPRO_IMM8_Y0_TLS_GD_ADD, 0, 8), TILEPRO_IMM_HOWTO(R_TILEPRO_IMM8_Y1_TLS_GD_ADD, 0, 8), TILEPRO_IMM_HOWTO(R_TILEPRO_TLS_IE_LOAD, 0, 8), /* Offsets into the GOT of TLS Descriptors. */ HOWTO (R_TILEPRO_IMM16_X0_TLS_GD,/* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_IMM16_X0_TLS_GD",/* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0xffff, /* dst_mask */ FALSE), /* pcrel_offset */ HOWTO (R_TILEPRO_IMM16_X1_TLS_GD,/* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_IMM16_X1_TLS_GD",/* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0xffff, /* dst_mask */ FALSE), /* pcrel_offset */ TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_TLS_GD_LO, 0), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_TLS_GD_LO, 0), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_TLS_GD_HI, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_TLS_GD_HI, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_TLS_GD_HA, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_TLS_GD_HA, 16), /* Offsets into the GOT of TLS Descriptors. */ HOWTO (R_TILEPRO_IMM16_X0_TLS_IE,/* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_IMM16_X0_TLS_IE",/* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ -1, /* dst_mask */ TRUE), /* pcrel_offset */ HOWTO (R_TILEPRO_IMM16_X1_TLS_IE,/* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_IMM16_X1_TLS_IE",/* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ -1, /* dst_mask */ TRUE), /* pcrel_offset */ TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_TLS_IE_LO, 0), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_TLS_IE_LO, 0), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_TLS_IE_HI, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_TLS_IE_HI, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_TLS_IE_HA, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_TLS_IE_HA, 16), /* These are common with the Solaris TLS implementation. */ HOWTO(R_TILEPRO_TLS_DTPMOD32, 0, 0, 0, FALSE, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_TILEPRO_TLS_DTPMOD32", FALSE, 0, 0, TRUE), HOWTO(R_TILEPRO_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_TILEPRO_TLS_DTPOFF32", FALSE, 0, 0xFFFFFFFF, TRUE), HOWTO(R_TILEPRO_TLS_TPOFF32, 0, 0, 0, FALSE, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_TILEPRO_TLS_TPOFF32", FALSE, 0, 0, TRUE), HOWTO (R_TILEPRO_IMM16_X0_TLS_LE,/* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_IMM16_X0_TLS_LE",/* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ -1, /* dst_mask */ TRUE), /* pcrel_offset */ HOWTO (R_TILEPRO_IMM16_X1_TLS_LE,/* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_TILEPRO_IMM16_X1_TLS_LE",/* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ -1, /* dst_mask */ TRUE), /* pcrel_offset */ TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_TLS_LE_LO, 0), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_TLS_LE_LO, 0), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_TLS_LE_HI, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_TLS_LE_HI, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X0_TLS_LE_HA, 16), TILEPRO_IMM16_HOWTO (R_TILEPRO_IMM16_X1_TLS_LE_HA, 16), }; static reloc_howto_type tilepro_elf_howto_table2 [] = { /* GNU extension to record C++ vtable hierarchy */ HOWTO (R_TILEPRO_GNU_VTINHERIT, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 0, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ NULL, /* special_function */ "R_TILEPRO_GNU_VTINHERIT", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ FALSE), /* pcrel_offset */ /* GNU extension to record C++ vtable member usage */ HOWTO (R_TILEPRO_GNU_VTENTRY, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 0, /* bitsize */ FALSE, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ _bfd_elf_rel_vtable_reloc_fn, /* special_function */ "R_TILEPRO_GNU_VTENTRY", /* name */ FALSE, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ FALSE), /* pcrel_offset */ }; /* Map BFD reloc types to TILEPRO ELF reloc types. */ typedef struct tilepro_reloc_map { bfd_reloc_code_real_type bfd_reloc_val; unsigned int tilepro_reloc_val; reloc_howto_type * table; } reloc_map; static const reloc_map tilepro_reloc_map [] = { #define TH_REMAP(bfd, tilepro) \ { bfd, tilepro, tilepro_elf_howto_table }, /* Standard relocations. */ TH_REMAP (BFD_RELOC_NONE, R_TILEPRO_NONE) TH_REMAP (BFD_RELOC_32, R_TILEPRO_32) TH_REMAP (BFD_RELOC_16, R_TILEPRO_16) TH_REMAP (BFD_RELOC_8, R_TILEPRO_8) TH_REMAP (BFD_RELOC_32_PCREL, R_TILEPRO_32_PCREL) TH_REMAP (BFD_RELOC_16_PCREL, R_TILEPRO_16_PCREL) TH_REMAP (BFD_RELOC_8_PCREL, R_TILEPRO_8_PCREL) TH_REMAP (BFD_RELOC_LO16, R_TILEPRO_LO16) TH_REMAP (BFD_RELOC_HI16, R_TILEPRO_HI16) TH_REMAP (BFD_RELOC_HI16_S, R_TILEPRO_HA16) /* Custom relocations. */ TH_REMAP (BFD_RELOC_TILEPRO_COPY, R_TILEPRO_COPY) TH_REMAP (BFD_RELOC_TILEPRO_GLOB_DAT, R_TILEPRO_GLOB_DAT) TH_REMAP (BFD_RELOC_TILEPRO_JMP_SLOT, R_TILEPRO_JMP_SLOT) TH_REMAP (BFD_RELOC_TILEPRO_RELATIVE, R_TILEPRO_RELATIVE) TH_REMAP (BFD_RELOC_TILEPRO_BROFF_X1, R_TILEPRO_BROFF_X1) TH_REMAP (BFD_RELOC_TILEPRO_JOFFLONG_X1, R_TILEPRO_JOFFLONG_X1) TH_REMAP (BFD_RELOC_TILEPRO_JOFFLONG_X1_PLT, R_TILEPRO_JOFFLONG_X1_PLT) TH_REMAP (BFD_RELOC_TILEPRO_IMM8_X0, R_TILEPRO_IMM8_X0) TH_REMAP (BFD_RELOC_TILEPRO_IMM8_Y0, R_TILEPRO_IMM8_Y0) TH_REMAP (BFD_RELOC_TILEPRO_IMM8_X1, R_TILEPRO_IMM8_X1) TH_REMAP (BFD_RELOC_TILEPRO_IMM8_Y1, R_TILEPRO_IMM8_Y1) TH_REMAP (BFD_RELOC_TILEPRO_DEST_IMM8_X1, R_TILEPRO_DEST_IMM8_X1) TH_REMAP (BFD_RELOC_TILEPRO_MT_IMM15_X1, R_TILEPRO_MT_IMM15_X1) TH_REMAP (BFD_RELOC_TILEPRO_MF_IMM15_X1, R_TILEPRO_MF_IMM15_X1) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0, R_TILEPRO_IMM16_X0) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1, R_TILEPRO_IMM16_X1) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_LO, R_TILEPRO_IMM16_X0_LO) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_LO, R_TILEPRO_IMM16_X1_LO) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_HI, R_TILEPRO_IMM16_X0_HI) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_HI, R_TILEPRO_IMM16_X1_HI) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_HA, R_TILEPRO_IMM16_X0_HA) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_HA, R_TILEPRO_IMM16_X1_HA) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_PCREL, R_TILEPRO_IMM16_X0_PCREL) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_PCREL, R_TILEPRO_IMM16_X1_PCREL) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_LO_PCREL, R_TILEPRO_IMM16_X0_LO_PCREL) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_LO_PCREL, R_TILEPRO_IMM16_X1_LO_PCREL) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_HI_PCREL, R_TILEPRO_IMM16_X0_HI_PCREL) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_HI_PCREL, R_TILEPRO_IMM16_X1_HI_PCREL) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_HA_PCREL, R_TILEPRO_IMM16_X0_HA_PCREL) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_HA_PCREL, R_TILEPRO_IMM16_X1_HA_PCREL) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_GOT, R_TILEPRO_IMM16_X0_GOT) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_GOT, R_TILEPRO_IMM16_X1_GOT) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_GOT_LO, R_TILEPRO_IMM16_X0_GOT_LO) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_GOT_LO, R_TILEPRO_IMM16_X1_GOT_LO) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_GOT_HI, R_TILEPRO_IMM16_X0_GOT_HI) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_GOT_HI, R_TILEPRO_IMM16_X1_GOT_HI) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_GOT_HA, R_TILEPRO_IMM16_X0_GOT_HA) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_GOT_HA, R_TILEPRO_IMM16_X1_GOT_HA) TH_REMAP (BFD_RELOC_TILEPRO_MMSTART_X0, R_TILEPRO_MMSTART_X0) TH_REMAP (BFD_RELOC_TILEPRO_MMEND_X0, R_TILEPRO_MMEND_X0) TH_REMAP (BFD_RELOC_TILEPRO_MMSTART_X1, R_TILEPRO_MMSTART_X1) TH_REMAP (BFD_RELOC_TILEPRO_MMEND_X1, R_TILEPRO_MMEND_X1) TH_REMAP (BFD_RELOC_TILEPRO_SHAMT_X0, R_TILEPRO_SHAMT_X0) TH_REMAP (BFD_RELOC_TILEPRO_SHAMT_X1, R_TILEPRO_SHAMT_X1) TH_REMAP (BFD_RELOC_TILEPRO_SHAMT_Y0, R_TILEPRO_SHAMT_Y0) TH_REMAP (BFD_RELOC_TILEPRO_SHAMT_Y1, R_TILEPRO_SHAMT_Y1) TH_REMAP (BFD_RELOC_TILEPRO_TLS_GD_CALL, R_TILEPRO_TLS_GD_CALL) TH_REMAP (BFD_RELOC_TILEPRO_IMM8_X0_TLS_GD_ADD, R_TILEPRO_IMM8_X0_TLS_GD_ADD) TH_REMAP (BFD_RELOC_TILEPRO_IMM8_X1_TLS_GD_ADD, R_TILEPRO_IMM8_X1_TLS_GD_ADD) TH_REMAP (BFD_RELOC_TILEPRO_IMM8_Y0_TLS_GD_ADD, R_TILEPRO_IMM8_Y0_TLS_GD_ADD) TH_REMAP (BFD_RELOC_TILEPRO_IMM8_Y1_TLS_GD_ADD, R_TILEPRO_IMM8_Y1_TLS_GD_ADD) TH_REMAP (BFD_RELOC_TILEPRO_TLS_IE_LOAD, R_TILEPRO_TLS_IE_LOAD) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_TLS_GD, R_TILEPRO_IMM16_X0_TLS_GD) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_TLS_GD, R_TILEPRO_IMM16_X1_TLS_GD) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_TLS_GD_LO, R_TILEPRO_IMM16_X0_TLS_GD_LO) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_TLS_GD_LO, R_TILEPRO_IMM16_X1_TLS_GD_LO) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_TLS_GD_HI, R_TILEPRO_IMM16_X0_TLS_GD_HI) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_TLS_GD_HI, R_TILEPRO_IMM16_X1_TLS_GD_HI) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_TLS_GD_HA, R_TILEPRO_IMM16_X0_TLS_GD_HA) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_TLS_GD_HA, R_TILEPRO_IMM16_X1_TLS_GD_HA) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_TLS_IE, R_TILEPRO_IMM16_X0_TLS_IE) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_TLS_IE, R_TILEPRO_IMM16_X1_TLS_IE) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_TLS_IE_LO, R_TILEPRO_IMM16_X0_TLS_IE_LO) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_TLS_IE_LO, R_TILEPRO_IMM16_X1_TLS_IE_LO) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_TLS_IE_HI, R_TILEPRO_IMM16_X0_TLS_IE_HI) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_TLS_IE_HI, R_TILEPRO_IMM16_X1_TLS_IE_HI) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_TLS_IE_HA, R_TILEPRO_IMM16_X0_TLS_IE_HA) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_TLS_IE_HA, R_TILEPRO_IMM16_X1_TLS_IE_HA) TH_REMAP (BFD_RELOC_TILEPRO_TLS_DTPMOD32, R_TILEPRO_TLS_DTPMOD32) TH_REMAP (BFD_RELOC_TILEPRO_TLS_DTPOFF32, R_TILEPRO_TLS_DTPOFF32) TH_REMAP (BFD_RELOC_TILEPRO_TLS_TPOFF32, R_TILEPRO_TLS_TPOFF32) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_TLS_LE, R_TILEPRO_IMM16_X0_TLS_LE) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_TLS_LE, R_TILEPRO_IMM16_X1_TLS_LE) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_TLS_LE_LO, R_TILEPRO_IMM16_X0_TLS_LE_LO) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_TLS_LE_LO, R_TILEPRO_IMM16_X1_TLS_LE_LO) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_TLS_LE_HI, R_TILEPRO_IMM16_X0_TLS_LE_HI) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_TLS_LE_HI, R_TILEPRO_IMM16_X1_TLS_LE_HI) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X0_TLS_LE_HA, R_TILEPRO_IMM16_X0_TLS_LE_HA) TH_REMAP (BFD_RELOC_TILEPRO_IMM16_X1_TLS_LE_HA, R_TILEPRO_IMM16_X1_TLS_LE_HA) #undef TH_REMAP { BFD_RELOC_VTABLE_INHERIT, R_TILEPRO_GNU_VTINHERIT, tilepro_elf_howto_table2 }, { BFD_RELOC_VTABLE_ENTRY, R_TILEPRO_GNU_VTENTRY, tilepro_elf_howto_table2 }, }; /* The TILEPro linker needs to keep track of the number of relocs that it decides to copy as dynamic relocs in check_relocs for each symbol. This is so that it can later discard them if they are found to be unnecessary. We store the information in a field extending the regular ELF linker hash table. */ struct tilepro_elf_dyn_relocs { struct tilepro_elf_dyn_relocs *next; /* The input section of the reloc. */ asection *sec; /* Total number of relocs copied for the input section. */ bfd_size_type count; /* Number of pc-relative relocs copied for the input section. */ bfd_size_type pc_count; }; /* TILEPRO ELF linker hash entry. */ struct tilepro_elf_link_hash_entry { struct elf_link_hash_entry elf; /* Track dynamic relocs copied for this symbol. */ struct tilepro_elf_dyn_relocs *dyn_relocs; #define GOT_UNKNOWN 0 #define GOT_NORMAL 1 #define GOT_TLS_GD 2 #define GOT_TLS_IE 4 unsigned char tls_type; }; #define tilepro_elf_hash_entry(ent) \ ((struct tilepro_elf_link_hash_entry *)(ent)) struct _bfd_tilepro_elf_obj_tdata { struct elf_obj_tdata root; /* tls_type for each local got entry. */ char *local_got_tls_type; }; #define _bfd_tilepro_elf_tdata(abfd) \ ((struct _bfd_tilepro_elf_obj_tdata *) (abfd)->tdata.any) #define _bfd_tilepro_elf_local_got_tls_type(abfd) \ (_bfd_tilepro_elf_tdata (abfd)->local_got_tls_type) #define is_tilepro_elf(bfd) \ (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ && elf_tdata (bfd) != NULL \ && elf_object_id (bfd) == TILEPRO_ELF_DATA) #include "elf/common.h" #include "elf/internal.h" struct tilepro_elf_link_hash_table { struct elf_link_hash_table elf; /* Short-cuts to get to dynamic linker sections. */ asection *sdynbss; asection *srelbss; /* Small local sym to section mapping cache. */ struct sym_cache sym_cache; }; /* Get the Tilepro ELF linker hash table from a link_info structure. */ #define tilepro_elf_hash_table(p) \ (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ == TILEPRO_ELF_DATA \ ? ((struct tilepro_elf_link_hash_table *) ((p)->hash)) : NULL) static reloc_howto_type * tilepro_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) { unsigned int i; for (i = ARRAY_SIZE (tilepro_reloc_map); --i;) { const reloc_map * entry; entry = tilepro_reloc_map + i; if (entry->bfd_reloc_val == code) return entry->table + (entry->tilepro_reloc_val - entry->table[0].type); } return NULL; } static reloc_howto_type * tilepro_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) { unsigned int i; for (i = 0; i < (sizeof (tilepro_elf_howto_table) / sizeof (tilepro_elf_howto_table[0])); i++) if (tilepro_elf_howto_table[i].name != NULL && strcasecmp (tilepro_elf_howto_table[i].name, r_name) == 0) return &tilepro_elf_howto_table[i]; return NULL; } /* Set the howto pointer for an TILEPro ELF reloc. */ static void tilepro_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, arelent * cache_ptr, Elf_Internal_Rela * dst) { unsigned int r_type = ELF32_R_TYPE (dst->r_info); if (r_type <= (unsigned int) R_TILEPRO_IMM16_X1_TLS_LE_HA) cache_ptr->howto = &tilepro_elf_howto_table [r_type]; else if (r_type - R_TILEPRO_GNU_VTINHERIT <= (unsigned int) R_TILEPRO_GNU_VTENTRY) cache_ptr->howto = &tilepro_elf_howto_table2 [r_type - R_TILEPRO_GNU_VTINHERIT]; else abort (); } typedef tilepro_bundle_bits (*tilepro_create_func)(int); static const tilepro_create_func reloc_to_create_func[] = { /* The first fourteen relocation types don't correspond to operands */ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* The remaining relocations are used for immediate operands */ create_BrOff_X1, create_JOffLong_X1, create_JOffLong_X1, create_Imm8_X0, create_Imm8_Y0, create_Imm8_X1, create_Imm8_Y1, create_MT_Imm15_X1, create_MF_Imm15_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_MMStart_X0, create_MMEnd_X0, create_MMStart_X1, create_MMEnd_X1, create_ShAmt_X0, create_ShAmt_X1, create_ShAmt_Y0, create_ShAmt_Y1, create_Dest_Imm8_X1, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, NULL, NULL, NULL, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, create_Imm16_X0, create_Imm16_X1, }; #define NELEMS(a) ((int) (sizeof (a) / sizeof ((a)[0]))) /* Support for core dump NOTE sections. */ static bfd_boolean tilepro_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) { int offset; size_t size; if (note->descsz != TILEPRO_PRSTATUS_SIZEOF) return FALSE; /* pr_cursig */ elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + TILEPRO_PRSTATUS_OFFSET_PR_CURSIG); /* pr_pid */ elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + TILEPRO_PRSTATUS_OFFSET_PR_PID); /* pr_reg */ offset = TILEPRO_PRSTATUS_OFFSET_PR_REG; size = TILEPRO_GREGSET_T_SIZE; /* Make a ".reg/999" section. */ return _bfd_elfcore_make_pseudosection (abfd, ".reg", size, note->descpos + offset); } static bfd_boolean tilepro_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) { if (note->descsz != TILEPRO_PRPSINFO_SIZEOF) return FALSE; elf_tdata (abfd)->core_program = _bfd_elfcore_strndup (abfd, note->descdata + TILEPRO_PRPSINFO_OFFSET_PR_FNAME, 16); elf_tdata (abfd)->core_command = _bfd_elfcore_strndup (abfd, note->descdata + TILEPRO_PRPSINFO_OFFSET_PR_PSARGS, ELF_PR_PSARGS_SIZE); /* Note that for some reason, a spurious space is tacked onto the end of the args in some (at least one anyway) implementations, so strip it off if it exists. */ { char *command = elf_tdata (abfd)->core_command; int n = strlen (command); if (0 < n && command[n - 1] == ' ') command[n - 1] = '\0'; } return TRUE; } static void tilepro_elf_append_rela_32 (bfd *abfd, asection *s, Elf_Internal_Rela *rel) { Elf32_External_Rela *loc32; loc32 = (Elf32_External_Rela *) s->contents; loc32 += s->reloc_count++; bfd_elf32_swap_reloca_out (abfd, rel, (bfd_byte *) loc32); } /* PLT/GOT stuff */ /* The procedure linkage table starts with the following header: { rli r29, r29, 16 lwadd r28, r27, 4 } lw r27, r27 { info 10 ## SP not offset, return PC in LR jr r27 } Subsequent entries are the following, jumping to the header at the end: lnk r28 1: { auli r28, r28, <_GLOBAL_OFFSET_TABLE_ - 1b + MY_GOT_OFFSET> auli r27, r28, <_GLOBAL_OFFSET_TABLE_ - 1b> } { addli r28, r28, <_GLOBAL_OFFSET_TABLE_ - 1b + MY_GOT_OFFSET> addli r27, r27, <_GLOBAL_OFFSET_TABLE_ - 1b> } { auli r29, zero, MY_PLT_INDEX lw r28, r28 } { info 10 ## SP not offset, return PC in LR jr r28 } We initially store MY_PLT_INDEX in the high bits so that we can use the all 16 bits as an unsigned offset; if we use the low bits we would get an unwanted sign extension. The PLT header then rotates the index to get the right value, before calling the resolution routine. This computation can fit in unused bundle slots so it's free. This code sequence lets the code at at the start of the PLT determine which PLT entry was executed by examining 'r29'. Note that MY_PLT_INDEX skips over the header entries, so the first actual jump table entry has index zero. */ #define PLT_HEADER_SIZE_IN_BUNDLES 3 #define PLT_ENTRY_SIZE_IN_BUNDLES 5 #define PLT_HEADER_SIZE \ (PLT_HEADER_SIZE_IN_BUNDLES * TILEPRO_BUNDLE_SIZE_IN_BYTES) #define PLT_ENTRY_SIZE \ (PLT_ENTRY_SIZE_IN_BUNDLES * TILEPRO_BUNDLE_SIZE_IN_BYTES) /* The size in bytes of an entry in the global offset table. */ #define GOT_ENTRY_SIZE TILEPRO_BYTES_PER_WORD #define GOTPLT_HEADER_SIZE (2 * GOT_ENTRY_SIZE) static const bfd_byte tilepro_plt0_entry[PLT_HEADER_SIZE] = { 0x5d, 0x07, 0x03, 0x70, 0x6e, 0x23, 0xd0, 0x30, /* { rli r29, r29, 16 ; lwadd r28, r27, 4 } */ 0x00, 0x50, 0xba, 0x6d, 0x00, 0x08, 0x6d, 0xdc, /* { lw r27, r27 } */ 0xff, 0xaf, 0x10, 0x50, 0x60, 0x03, 0x18, 0x08, /* { info 10 ; jr r27 } */ }; static const bfd_byte tilepro_short_plt_entry[PLT_ENTRY_SIZE] = { 0x00, 0x50, 0x16, 0x70, 0x0e, 0x00, 0x1a, 0x08, /* { lnk r28 } */ 0x1c, 0x07, 0x00, 0xa0, 0x8d, 0x03, 0x00, 0x18, /* { addli r28, r28, 0 ; addli r27, r28, 0 } */ 0xdd, 0x0f, 0x00, 0x30, 0x8e, 0x73, 0x0b, 0x40, /* { auli r29, zero, 0 ; lw r28, r28 } */ 0xff, 0xaf, 0x10, 0x50, 0x80, 0x03, 0x18, 0x08, /* { info 10 ; jr r28 } */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }; static const bfd_byte tilepro_long_plt_entry[PLT_ENTRY_SIZE] = { 0x00, 0x50, 0x16, 0x70, 0x0e, 0x00, 0x1a, 0x08, /* { lnk r28 } */ 0x1c, 0x07, 0x00, 0xb0, 0x8d, 0x03, 0x00, 0x20, /* { auli r28, r28, 0 ; auli r27, r28, 0 } */ 0x1c, 0x07, 0x00, 0xa0, 0x6d, 0x03, 0x00, 0x18, /* { addli r28, r28, 0 ; addli r27, r27, 0 } */ 0xdd, 0x0f, 0x00, 0x30, 0x8e, 0x73, 0x0b, 0x40, /* { auli r29, zero, 0 ; lw r28, r28 } */ 0xff, 0xaf, 0x10, 0x50, 0x80, 0x03, 0x18, 0x08, /* { info 10 ; jr r28 } */ }; static bfd_vma tilepro_ha16(bfd_vma vma) { return ((vma >> 16) + ((vma >> 15) & 1)) & 0xffff; } static int tilepro_plt_entry_build (asection *splt, asection *sgotplt, bfd_vma offset, bfd_vma *r_offset) { int plt_index = (offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; int got_offset = plt_index * GOT_ENTRY_SIZE + GOTPLT_HEADER_SIZE; tilepro_bundle_bits *pc; /* Compute the distance from the got entry to the lnk. */ bfd_signed_vma dist_got_entry = sgotplt->output_section->vma + sgotplt->output_offset + got_offset - splt->output_section->vma - splt->output_offset - offset - TILEPRO_BUNDLE_SIZE_IN_BYTES; /* Compute the distance to GOTPLT[0]. */ bfd_signed_vma dist_got0 = dist_got_entry - got_offset; /* Check whether we can use the short plt entry with 16-bit offset. */ bfd_boolean short_plt_entry = (dist_got_entry <= 0x7fff && dist_got0 >= -0x8000); /* Copy the plt entry template. */ memcpy (splt->contents + offset, short_plt_entry ? tilepro_short_plt_entry : tilepro_long_plt_entry, PLT_ENTRY_SIZE); /* Write the immediate offsets. */ pc = (tilepro_bundle_bits *)(splt->contents + offset); pc++; if (!short_plt_entry) { /* { auli r28, r28, &GOTPLT[MY_GOT_INDEX] ; auli r27, r28, &GOTPLT[0] } */ *pc++ |= create_Imm16_X0 (tilepro_ha16 (dist_got_entry)) | create_Imm16_X1 (tilepro_ha16 (dist_got0)); } /* { addli r28, r28, &GOTPLT[MY_GOT_INDEX] ; addli r27, r28, &GOTPLT[0] } or { addli r28, r28, &GOTPLT[MY_GOT_INDEX] ; addli r27, r27, &GOTPLT[0] } */ *pc++ |= create_Imm16_X0 (dist_got_entry) | create_Imm16_X1 (dist_got0); /* { auli r29, zero, MY_PLT_INDEX ; lw r28, r28 } */ *pc |= create_Imm16_X0 (plt_index); /* Set the relocation offset. */ *r_offset = got_offset; return plt_index; } #define TILEPRO_ELF_RELA_BYTES (sizeof(Elf32_External_Rela)) /* Create an entry in an TILEPro ELF linker hash table. */ static struct bfd_hash_entry * link_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table, const char *string) { /* Allocate the structure if it has not already been allocated by a subclass. */ if (entry == NULL) { entry = bfd_hash_allocate (table, sizeof (struct tilepro_elf_link_hash_entry)); if (entry == NULL) return entry; } /* Call the allocation method of the superclass. */ entry = _bfd_elf_link_hash_newfunc (entry, table, string); if (entry != NULL) { struct tilepro_elf_link_hash_entry *eh; eh = (struct tilepro_elf_link_hash_entry *) entry; eh->dyn_relocs = NULL; eh->tls_type = GOT_UNKNOWN; } return entry; } /* Create a TILEPRO ELF linker hash table. */ static struct bfd_link_hash_table * tilepro_elf_link_hash_table_create (bfd *abfd) { struct tilepro_elf_link_hash_table *ret; bfd_size_type amt = sizeof (struct tilepro_elf_link_hash_table); ret = (struct tilepro_elf_link_hash_table *) bfd_zmalloc (amt); if (ret == NULL) return NULL; if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, sizeof (struct tilepro_elf_link_hash_entry), TILEPRO_ELF_DATA)) { free (ret); return NULL; } return &ret->elf.root; } /* Create the .got section. */ static bfd_boolean tilepro_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) { flagword flags; asection *s, *s_got; struct elf_link_hash_entry *h; const struct elf_backend_data *bed = get_elf_backend_data (abfd); struct elf_link_hash_table *htab = elf_hash_table (info); /* This function may be called more than once. */ s = bfd_get_section_by_name (abfd, ".got"); if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0) return TRUE; flags = bed->dynamic_sec_flags; s = bfd_make_section_with_flags (abfd, (bed->rela_plts_and_copies_p ? ".rela.got" : ".rel.got"), (bed->dynamic_sec_flags | SEC_READONLY)); if (s == NULL || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) return FALSE; htab->srelgot = s; s = s_got = bfd_make_section_with_flags (abfd, ".got", flags); if (s == NULL || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) return FALSE; htab->sgot = s; /* The first bit of the global offset table is the header. */ s->size += bed->got_header_size; if (bed->want_got_plt) { s = bfd_make_section_with_flags (abfd, ".got.plt", flags); if (s == NULL || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) return FALSE; htab->sgotplt = s; /* Reserve room for the header. */ s->size += GOTPLT_HEADER_SIZE; } if (bed->want_got_sym) { /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got section. We don't do this in the linker script because we don't want to define the symbol if we are not creating a global offset table. */ h = _bfd_elf_define_linkage_sym (abfd, info, s_got, "_GLOBAL_OFFSET_TABLE_"); elf_hash_table (info)->hgot = h; if (h == NULL) return FALSE; } return TRUE; } /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts to them in our hash table. */ static bfd_boolean tilepro_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) { struct tilepro_elf_link_hash_table *htab; htab = tilepro_elf_hash_table (info); BFD_ASSERT (htab != NULL); if (!tilepro_elf_create_got_section (dynobj, info)) return FALSE; if (!_bfd_elf_create_dynamic_sections (dynobj, info)) return FALSE; htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); if (!info->shared) htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss || (!info->shared && !htab->srelbss)) abort (); return TRUE; } /* Copy the extra info we tack onto an elf_link_hash_entry. */ static void tilepro_elf_copy_indirect_symbol (struct bfd_link_info *info, struct elf_link_hash_entry *dir, struct elf_link_hash_entry *ind) { struct tilepro_elf_link_hash_entry *edir, *eind; edir = (struct tilepro_elf_link_hash_entry *) dir; eind = (struct tilepro_elf_link_hash_entry *) ind; if (eind->dyn_relocs != NULL) { if (edir->dyn_relocs != NULL) { struct tilepro_elf_dyn_relocs **pp; struct tilepro_elf_dyn_relocs *p; /* Add reloc counts against the indirect sym to the direct sym list. Merge any entries against the same section. */ for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) { struct tilepro_elf_dyn_relocs *q; for (q = edir->dyn_relocs; q != NULL; q = q->next) if (q->sec == p->sec) { q->pc_count += p->pc_count; q->count += p->count; *pp = p->next; break; } if (q == NULL) pp = &p->next; } *pp = edir->dyn_relocs; } edir->dyn_relocs = eind->dyn_relocs; eind->dyn_relocs = NULL; } if (ind->root.type == bfd_link_hash_indirect && dir->got.refcount <= 0) { edir->tls_type = eind->tls_type; eind->tls_type = GOT_UNKNOWN; } _bfd_elf_link_hash_copy_indirect (info, dir, ind); } static int tilepro_tls_translate_to_le (int r_type) { switch (r_type) { case R_TILEPRO_IMM16_X0_TLS_GD: case R_TILEPRO_IMM16_X0_TLS_IE: return R_TILEPRO_IMM16_X0_TLS_LE; case R_TILEPRO_IMM16_X1_TLS_GD: case R_TILEPRO_IMM16_X1_TLS_IE: return R_TILEPRO_IMM16_X1_TLS_LE; case R_TILEPRO_IMM16_X0_TLS_GD_LO: case R_TILEPRO_IMM16_X0_TLS_IE_LO: return R_TILEPRO_IMM16_X0_TLS_LE_LO; case R_TILEPRO_IMM16_X1_TLS_GD_LO: case R_TILEPRO_IMM16_X1_TLS_IE_LO: return R_TILEPRO_IMM16_X1_TLS_LE_LO; case R_TILEPRO_IMM16_X0_TLS_GD_HI: case R_TILEPRO_IMM16_X0_TLS_IE_HI: return R_TILEPRO_IMM16_X0_TLS_LE_HI; case R_TILEPRO_IMM16_X1_TLS_GD_HI: case R_TILEPRO_IMM16_X1_TLS_IE_HI: return R_TILEPRO_IMM16_X1_TLS_LE_HI; case R_TILEPRO_IMM16_X0_TLS_GD_HA: case R_TILEPRO_IMM16_X0_TLS_IE_HA: return R_TILEPRO_IMM16_X0_TLS_LE_HA; case R_TILEPRO_IMM16_X1_TLS_GD_HA: case R_TILEPRO_IMM16_X1_TLS_IE_HA: return R_TILEPRO_IMM16_X1_TLS_LE_HA; } return r_type; } static int tilepro_tls_translate_to_ie (int r_type) { switch (r_type) { case R_TILEPRO_IMM16_X0_TLS_GD: case R_TILEPRO_IMM16_X0_TLS_IE: return R_TILEPRO_IMM16_X0_TLS_IE; case R_TILEPRO_IMM16_X1_TLS_GD: case R_TILEPRO_IMM16_X1_TLS_IE: return R_TILEPRO_IMM16_X1_TLS_IE; case R_TILEPRO_IMM16_X0_TLS_GD_LO: case R_TILEPRO_IMM16_X0_TLS_IE_LO: return R_TILEPRO_IMM16_X0_TLS_IE_LO; case R_TILEPRO_IMM16_X1_TLS_GD_LO: case R_TILEPRO_IMM16_X1_TLS_IE_LO: return R_TILEPRO_IMM16_X1_TLS_IE_LO; case R_TILEPRO_IMM16_X0_TLS_GD_HI: case R_TILEPRO_IMM16_X0_TLS_IE_HI: return R_TILEPRO_IMM16_X0_TLS_IE_HI; case R_TILEPRO_IMM16_X1_TLS_GD_HI: case R_TILEPRO_IMM16_X1_TLS_IE_HI: return R_TILEPRO_IMM16_X1_TLS_IE_HI; case R_TILEPRO_IMM16_X0_TLS_GD_HA: case R_TILEPRO_IMM16_X0_TLS_IE_HA: return R_TILEPRO_IMM16_X0_TLS_IE_HA; case R_TILEPRO_IMM16_X1_TLS_GD_HA: case R_TILEPRO_IMM16_X1_TLS_IE_HA: return R_TILEPRO_IMM16_X1_TLS_IE_HA; } return r_type; } static int tilepro_elf_tls_transition (struct bfd_link_info *info, int r_type, int is_local) { if (info->shared) return r_type; if (is_local) return tilepro_tls_translate_to_le (r_type); else return tilepro_tls_translate_to_ie (r_type); } /* Look through the relocs for a section during the first phase, and allocate space in the global offset table or procedure linkage table. */ static bfd_boolean tilepro_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec, const Elf_Internal_Rela *relocs) { struct tilepro_elf_link_hash_table *htab; Elf_Internal_Shdr *symtab_hdr; struct elf_link_hash_entry **sym_hashes; const Elf_Internal_Rela *rel; const Elf_Internal_Rela *rel_end; asection *sreloc; int num_relocs; if (info->relocatable) return TRUE; htab = tilepro_elf_hash_table (info); symtab_hdr = &elf_tdata (abfd)->symtab_hdr; sym_hashes = elf_sym_hashes (abfd); sreloc = NULL; num_relocs = sec->reloc_count; BFD_ASSERT (is_tilepro_elf (abfd) || num_relocs == 0); if (htab->elf.dynobj == NULL) htab->elf.dynobj = abfd; rel_end = relocs + num_relocs; for (rel = relocs; rel < rel_end; rel++) { unsigned int r_type; unsigned long r_symndx; struct elf_link_hash_entry *h; int tls_type; r_symndx = ELF32_R_SYM (rel->r_info); r_type = ELF32_R_TYPE (rel->r_info); if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) { (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd, r_symndx); return FALSE; } if (r_symndx < symtab_hdr->sh_info) h = NULL; else { h = sym_hashes[r_symndx - symtab_hdr->sh_info]; while (h->root.type == bfd_link_hash_indirect || h->root.type == bfd_link_hash_warning) h = (struct elf_link_hash_entry *) h->root.u.i.link; } r_type = tilepro_elf_tls_transition (info, r_type, h == NULL); switch (r_type) { case R_TILEPRO_IMM16_X0_TLS_LE: case R_TILEPRO_IMM16_X1_TLS_LE: case R_TILEPRO_IMM16_X0_TLS_LE_LO: case R_TILEPRO_IMM16_X1_TLS_LE_LO: case R_TILEPRO_IMM16_X0_TLS_LE_HI: case R_TILEPRO_IMM16_X1_TLS_LE_HI: case R_TILEPRO_IMM16_X0_TLS_LE_HA: case R_TILEPRO_IMM16_X1_TLS_LE_HA: if (info->shared) goto r_tilepro_plt32; break; case R_TILEPRO_IMM16_X0_TLS_GD: case R_TILEPRO_IMM16_X1_TLS_GD: case R_TILEPRO_IMM16_X0_TLS_GD_LO: case R_TILEPRO_IMM16_X1_TLS_GD_LO: case R_TILEPRO_IMM16_X0_TLS_GD_HI: case R_TILEPRO_IMM16_X1_TLS_GD_HI: case R_TILEPRO_IMM16_X0_TLS_GD_HA: case R_TILEPRO_IMM16_X1_TLS_GD_HA: BFD_ASSERT (info->shared); tls_type = GOT_TLS_GD; goto have_got_reference; case R_TILEPRO_IMM16_X0_TLS_IE: case R_TILEPRO_IMM16_X1_TLS_IE: case R_TILEPRO_IMM16_X0_TLS_IE_LO: case R_TILEPRO_IMM16_X1_TLS_IE_LO: case R_TILEPRO_IMM16_X0_TLS_IE_HI: case R_TILEPRO_IMM16_X1_TLS_IE_HI: case R_TILEPRO_IMM16_X0_TLS_IE_HA: case R_TILEPRO_IMM16_X1_TLS_IE_HA: tls_type = GOT_TLS_IE; if (info->shared) info->flags |= DF_STATIC_TLS; goto have_got_reference; case R_TILEPRO_IMM16_X0_GOT: case R_TILEPRO_IMM16_X1_GOT: case R_TILEPRO_IMM16_X0_GOT_LO: case R_TILEPRO_IMM16_X1_GOT_LO: case R_TILEPRO_IMM16_X0_GOT_HI: case R_TILEPRO_IMM16_X1_GOT_HI: case R_TILEPRO_IMM16_X0_GOT_HA: case R_TILEPRO_IMM16_X1_GOT_HA: tls_type = GOT_NORMAL; /* Fall Through */ have_got_reference: /* This symbol requires a global offset table entry. */ { int old_tls_type; if (h != NULL) { h->got.refcount += 1; old_tls_type = tilepro_elf_hash_entry(h)->tls_type; } else { bfd_signed_vma *local_got_refcounts; /* This is a global offset table entry for a local symbol. */ local_got_refcounts = elf_local_got_refcounts (abfd); if (local_got_refcounts == NULL) { bfd_size_type size; size = symtab_hdr->sh_info; size *= (sizeof (bfd_signed_vma) + sizeof(char)); local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, size)); if (local_got_refcounts == NULL) return FALSE; elf_local_got_refcounts (abfd) = local_got_refcounts; _bfd_tilepro_elf_local_got_tls_type (abfd) = (char *) (local_got_refcounts + symtab_hdr->sh_info); } local_got_refcounts[r_symndx] += 1; old_tls_type = _bfd_tilepro_elf_local_got_tls_type (abfd) [r_symndx]; } /* If a TLS symbol is accessed using IE at least once, there is no point to use dynamic model for it. */ if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN && (old_tls_type != GOT_TLS_GD || tls_type != GOT_TLS_IE)) { if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD) tls_type = old_tls_type; else { (*_bfd_error_handler) (_("%B: `%s' accessed both as normal and thread local symbol"), abfd, h ? h->root.root.string : "<local>"); return FALSE; } } if (old_tls_type != tls_type) { if (h != NULL) tilepro_elf_hash_entry (h)->tls_type = tls_type; else _bfd_tilepro_elf_local_got_tls_type (abfd) [r_symndx] = tls_type; } } if (htab->elf.sgot == NULL) { if (!tilepro_elf_create_got_section (htab->elf.dynobj, info)) return FALSE; } break; case R_TILEPRO_TLS_GD_CALL: if (info->shared) { /* These are basically R_TILEPRO_JOFFLONG_X1_PLT relocs against __tls_get_addr. */ struct bfd_link_hash_entry *bh = NULL; if (! _bfd_generic_link_add_one_symbol (info, abfd, "__tls_get_addr", 0, bfd_und_section_ptr, 0, NULL, FALSE, FALSE, &bh)) return FALSE; h = (struct elf_link_hash_entry *) bh; } else break; /* Fall through */ case R_TILEPRO_JOFFLONG_X1_PLT: /* This symbol requires a procedure linkage table entry. We actually build the entry in adjust_dynamic_symbol, because this might be a case of linking PIC code without linking in any dynamic objects, in which case we don't need to generate a procedure linkage table after all. */ if (h != NULL) { h->needs_plt = 1; h->plt.refcount += 1; } break; case R_TILEPRO_32_PCREL: case R_TILEPRO_16_PCREL: case R_TILEPRO_8_PCREL: case R_TILEPRO_IMM16_X0_PCREL: case R_TILEPRO_IMM16_X1_PCREL: case R_TILEPRO_IMM16_X0_LO_PCREL: case R_TILEPRO_IMM16_X1_LO_PCREL: case R_TILEPRO_IMM16_X0_HI_PCREL: case R_TILEPRO_IMM16_X1_HI_PCREL: case R_TILEPRO_IMM16_X0_HA_PCREL: case R_TILEPRO_IMM16_X1_HA_PCREL: if (h != NULL) h->non_got_ref = 1; if (h != NULL && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) break; /* Fall through. */ case R_TILEPRO_32: case R_TILEPRO_16: case R_TILEPRO_8: case R_TILEPRO_LO16: case R_TILEPRO_HI16: case R_TILEPRO_HA16: case R_TILEPRO_COPY: case R_TILEPRO_GLOB_DAT: case R_TILEPRO_JMP_SLOT: case R_TILEPRO_RELATIVE: case R_TILEPRO_BROFF_X1: case R_TILEPRO_JOFFLONG_X1: case R_TILEPRO_IMM8_X0: case R_TILEPRO_IMM8_Y0: case R_TILEPRO_IMM8_X1: case R_TILEPRO_IMM8_Y1: case R_TILEPRO_DEST_IMM8_X1: case R_TILEPRO_MT_IMM15_X1: case R_TILEPRO_MF_IMM15_X1: case R_TILEPRO_IMM16_X0: case R_TILEPRO_IMM16_X1: case R_TILEPRO_IMM16_X0_LO: case R_TILEPRO_IMM16_X1_LO: case R_TILEPRO_IMM16_X0_HI: case R_TILEPRO_IMM16_X1_HI: case R_TILEPRO_IMM16_X0_HA: case R_TILEPRO_IMM16_X1_HA: case R_TILEPRO_MMSTART_X0: case R_TILEPRO_MMEND_X0: case R_TILEPRO_MMSTART_X1: case R_TILEPRO_MMEND_X1: case R_TILEPRO_SHAMT_X0: case R_TILEPRO_SHAMT_X1: case R_TILEPRO_SHAMT_Y0: case R_TILEPRO_SHAMT_Y1: if (h != NULL) h->non_got_ref = 1; r_tilepro_plt32: if (h != NULL && !info->shared) { /* We may need a .plt entry if the function this reloc refers to is in a shared lib. */ h->plt.refcount += 1; } /* If we are creating a shared library, and this is a reloc against a global symbol, or a non PC relative reloc against a local symbol, then we need to copy the reloc into the shared library. However, if we are linking with -Bsymbolic, we do not need to copy a reloc against a global symbol which is defined in an object we are including in the link (i.e., DEF_REGULAR is set). At this point we have not seen all the input files, so it is possible that DEF_REGULAR is not set now but will be set later (it is never cleared). In case of a weak definition, DEF_REGULAR may be cleared later by a strong definition in a shared library. We account for that possibility below by storing information in the relocs_copied field of the hash table entry. A similar situation occurs when creating shared libraries and symbol visibility changes render the symbol local. If on the other hand, we are creating an executable, we may need to keep relocations for symbols satisfied by a dynamic library if we manage to avoid copy relocs for the symbol. */ if ((info->shared && (sec->flags & SEC_ALLOC) != 0 && (! tilepro_elf_howto_table[r_type].pc_relative || (h != NULL && (! info->symbolic || h->root.type == bfd_link_hash_defweak || !h->def_regular)))) || (!info->shared && (sec->flags & SEC_ALLOC) != 0 && h != NULL && (h->root.type == bfd_link_hash_defweak || !h->def_regular))) { struct tilepro_elf_dyn_relocs *p; struct tilepro_elf_dyn_relocs **head; /* When creating a shared object, we must copy these relocs into the output file. We create a reloc section in dynobj and make room for the reloc. */ if (sreloc == NULL) { sreloc = _bfd_elf_make_dynamic_reloc_section (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE); if (sreloc == NULL) return FALSE; } /* If this is a global symbol, we count the number of relocations we need for this symbol. */ if (h != NULL) head = &((struct tilepro_elf_link_hash_entry *) h)->dyn_relocs; else { /* Track dynamic relocs needed for local syms too. We really need local syms available to do this easily. Oh well. */ asection *s; void *vpp; Elf_Internal_Sym *isym; isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx); if (isym == NULL) return FALSE; s = bfd_section_from_elf_index (abfd, isym->st_shndx); if (s == NULL) s = sec; vpp = &elf_section_data (s)->local_dynrel; head = (struct tilepro_elf_dyn_relocs **) vpp; } p = *head; if (p == NULL || p->sec != sec) { bfd_size_type amt = sizeof *p; p = ((struct tilepro_elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, amt)); if (p == NULL) return FALSE; p->next = *head; *head = p; p->sec = sec; p->count = 0; p->pc_count = 0; } p->count += 1; if (tilepro_elf_howto_table[r_type].pc_relative) p->pc_count += 1; } break; case R_TILEPRO_GNU_VTINHERIT: if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) return FALSE; break; case R_TILEPRO_GNU_VTENTRY: if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) return FALSE; break; default: break; } } return TRUE; } static asection * tilepro_elf_gc_mark_hook (asection *sec, struct bfd_link_info *info, Elf_Internal_Rela *rel, struct elf_link_hash_entry *h, Elf_Internal_Sym *sym) { if (h != NULL) { switch (ELF32_R_TYPE (rel->r_info)) { case R_TILEPRO_GNU_VTINHERIT: case R_TILEPRO_GNU_VTENTRY: break; } } return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); } /* Update the got entry reference counts for the section being removed. */ static bfd_boolean tilepro_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, asection *sec, const Elf_Internal_Rela *relocs) { struct tilepro_elf_link_hash_table *htab; Elf_Internal_Shdr *symtab_hdr; struct elf_link_hash_entry **sym_hashes; bfd_signed_vma *local_got_refcounts; const Elf_Internal_Rela *rel, *relend; if (info->relocatable) return TRUE; BFD_ASSERT (is_tilepro_elf (abfd) || sec->reloc_count == 0); elf_section_data (sec)->local_dynrel = NULL; htab = tilepro_elf_hash_table (info); BFD_ASSERT (htab != NULL); symtab_hdr = &elf_symtab_hdr (abfd); sym_hashes = elf_sym_hashes (abfd); local_got_refcounts = elf_local_got_refcounts (abfd); relend = relocs + sec->reloc_count; for (rel = relocs; rel < relend; rel++) { unsigned long r_symndx; unsigned int r_type; struct elf_link_hash_entry *h = NULL; r_symndx = ELF32_R_SYM (rel->r_info); if (r_symndx >= symtab_hdr->sh_info) { struct tilepro_elf_link_hash_entry *eh; struct tilepro_elf_dyn_relocs **pp; struct tilepro_elf_dyn_relocs *p; h = sym_hashes[r_symndx - symtab_hdr->sh_info]; while (h->root.type == bfd_link_hash_indirect || h->root.type == bfd_link_hash_warning) h = (struct elf_link_hash_entry *) h->root.u.i.link; eh = (struct tilepro_elf_link_hash_entry *) h; for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) if (p->sec == sec) { /* Everything must go for SEC. */ *pp = p->next; break; } } r_type = ELF32_R_TYPE (rel->r_info); r_type = tilepro_elf_tls_transition (info, r_type, h != NULL); switch (r_type) { case R_TILEPRO_IMM16_X0_GOT: case R_TILEPRO_IMM16_X1_GOT: case R_TILEPRO_IMM16_X0_GOT_LO: case R_TILEPRO_IMM16_X1_GOT_LO: case R_TILEPRO_IMM16_X0_GOT_HI: case R_TILEPRO_IMM16_X1_GOT_HI: case R_TILEPRO_IMM16_X0_GOT_HA: case R_TILEPRO_IMM16_X1_GOT_HA: case R_TILEPRO_IMM16_X0_TLS_GD: case R_TILEPRO_IMM16_X1_TLS_GD: case R_TILEPRO_IMM16_X0_TLS_GD_LO: case R_TILEPRO_IMM16_X1_TLS_GD_LO: case R_TILEPRO_IMM16_X0_TLS_GD_HI: case R_TILEPRO_IMM16_X1_TLS_GD_HI: case R_TILEPRO_IMM16_X0_TLS_GD_HA: case R_TILEPRO_IMM16_X1_TLS_GD_HA: case R_TILEPRO_IMM16_X0_TLS_IE: case R_TILEPRO_IMM16_X1_TLS_IE: case R_TILEPRO_IMM16_X0_TLS_IE_LO: case R_TILEPRO_IMM16_X1_TLS_IE_LO: case R_TILEPRO_IMM16_X0_TLS_IE_HI: case R_TILEPRO_IMM16_X1_TLS_IE_HI: case R_TILEPRO_IMM16_X0_TLS_IE_HA: case R_TILEPRO_IMM16_X1_TLS_IE_HA: if (h != NULL) { if (h->got.refcount > 0) h->got.refcount--; } else { if (local_got_refcounts && local_got_refcounts[r_symndx] > 0) local_got_refcounts[r_symndx]--; } break; case R_TILEPRO_32_PCREL: case R_TILEPRO_16_PCREL: case R_TILEPRO_8_PCREL: case R_TILEPRO_IMM16_X0_PCREL: case R_TILEPRO_IMM16_X1_PCREL: case R_TILEPRO_IMM16_X0_LO_PCREL: case R_TILEPRO_IMM16_X1_LO_PCREL: case R_TILEPRO_IMM16_X0_HI_PCREL: case R_TILEPRO_IMM16_X1_HI_PCREL: case R_TILEPRO_IMM16_X0_HA_PCREL: case R_TILEPRO_IMM16_X1_HA_PCREL: if (h != NULL && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) break; /* Fall through. */ case R_TILEPRO_32: case R_TILEPRO_16: case R_TILEPRO_8: case R_TILEPRO_LO16: case R_TILEPRO_HI16: case R_TILEPRO_HA16: case R_TILEPRO_COPY: case R_TILEPRO_GLOB_DAT: case R_TILEPRO_JMP_SLOT: case R_TILEPRO_RELATIVE: case R_TILEPRO_BROFF_X1: case R_TILEPRO_JOFFLONG_X1: case R_TILEPRO_IMM8_X0: case R_TILEPRO_IMM8_Y0: case R_TILEPRO_IMM8_X1: case R_TILEPRO_IMM8_Y1: case R_TILEPRO_DEST_IMM8_X1: case R_TILEPRO_MT_IMM15_X1: case R_TILEPRO_MF_IMM15_X1: case R_TILEPRO_IMM16_X0: case R_TILEPRO_IMM16_X1: case R_TILEPRO_IMM16_X0_LO: case R_TILEPRO_IMM16_X1_LO: case R_TILEPRO_IMM16_X0_HI: case R_TILEPRO_IMM16_X1_HI: case R_TILEPRO_IMM16_X0_HA: case R_TILEPRO_IMM16_X1_HA: case R_TILEPRO_MMSTART_X0: case R_TILEPRO_MMEND_X0: case R_TILEPRO_MMSTART_X1: case R_TILEPRO_MMEND_X1: case R_TILEPRO_SHAMT_X0: case R_TILEPRO_SHAMT_X1: case R_TILEPRO_SHAMT_Y0: case R_TILEPRO_SHAMT_Y1: if (info->shared) break; /* Fall through. */ case R_TILEPRO_JOFFLONG_X1_PLT: if (h != NULL) { if (h->plt.refcount > 0) h->plt.refcount--; } break; default: break; } } return TRUE; } /* Adjust a symbol defined by a dynamic object and referenced by a regular object. The current definition is in some section of the dynamic object, but we're not including those sections. We have to change the definition to something the rest of the link can understand. */ static bfd_boolean tilepro_elf_adjust_dynamic_symbol (struct bfd_link_info *info, struct elf_link_hash_entry *h) { struct tilepro_elf_link_hash_table *htab; struct tilepro_elf_link_hash_entry * eh; struct tilepro_elf_dyn_relocs *p; asection *s; htab = tilepro_elf_hash_table (info); BFD_ASSERT (htab != NULL); /* Make sure we know what is going on here. */ BFD_ASSERT (htab->elf.dynobj != NULL && (h->needs_plt || h->u.weakdef != NULL || (h->def_dynamic && h->ref_regular && !h->def_regular))); /* If this is a function, put it in the procedure linkage table. We will fill in the contents of the procedure linkage table later (although we could actually do it here). */ if (h->type == STT_FUNC || h->needs_plt) { if (h->plt.refcount <= 0 || SYMBOL_CALLS_LOCAL (info, h) || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT && h->root.type == bfd_link_hash_undefweak)) { /* This case can occur if we saw a R_TILEPRO_JOFFLONG_X1_PLT reloc in an input file, but the symbol was never referred to by a dynamic object, or if all references were garbage collected. In such a case, we don't actually need to build a procedure linkage table, and we can just do a R_TILEPRO_JOFFLONG_X1 relocation instead. */ h->plt.offset = (bfd_vma) -1; h->needs_plt = 0; } return TRUE; } else h->plt.offset = (bfd_vma) -1; /* If this is a weak symbol, and there is a real definition, the processor independent code will have arranged for us to see the real definition first, and we can just use the same value. */ if (h->u.weakdef != NULL) { BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined || h->u.weakdef->root.type == bfd_link_hash_defweak); h->root.u.def.section = h->u.weakdef->root.u.def.section; h->root.u.def.value = h->u.weakdef->root.u.def.value; return TRUE; } /* This is a reference to a symbol defined by a dynamic object which is not a function. */ /* If we are creating a shared library, we must presume that the only references to the symbol are via the global offset table. For such cases we need not do anything here; the relocations will be handled correctly by relocate_section. */ if (info->shared) return TRUE; /* If there are no references to this symbol that do not use the GOT, we don't need to generate a copy reloc. */ if (!h->non_got_ref) return TRUE; /* If -z nocopyreloc was given, we won't generate them either. */ if (info->nocopyreloc) { h->non_got_ref = 0; return TRUE; } eh = (struct tilepro_elf_link_hash_entry *) h; for (p = eh->dyn_relocs; p != NULL; p = p->next) { s = p->sec->output_section; if (s != NULL && (s->flags & SEC_READONLY) != 0) break; } /* If we didn't find any dynamic relocs in read-only sections, then we'll be keeping the dynamic relocs and avoiding the copy reloc. */ if (p == NULL) { h->non_got_ref = 0; return TRUE; } if (h->size == 0) { (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), h->root.root.string); return TRUE; } /* We must allocate the symbol in our .dynbss section, which will become part of the .bss section of the executable. There will be an entry for this symbol in the .dynsym section. The dynamic object will contain position independent code, so all references from the dynamic object to this symbol will go through the global offset table. The dynamic linker will use the .dynsym entry to determine the address it must put in the global offset table, so both the dynamic object and the regular object will refer to the same memory location for the variable. */ /* We must generate a R_TILEPRO_COPY reloc to tell the dynamic linker to copy the initial value out of the dynamic object and into the runtime process image. We need to remember the offset into the .rel.bss section we are going to use. */ if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) { htab->srelbss->size += TILEPRO_ELF_RELA_BYTES; h->needs_copy = 1; } return _bfd_elf_adjust_dynamic_copy (h, htab->sdynbss); } /* Allocate space in .plt, .got and associated reloc sections for dynamic relocs. */ static bfd_boolean allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) { struct bfd_link_info *info; struct tilepro_elf_link_hash_table *htab; struct tilepro_elf_link_hash_entry *eh; struct tilepro_elf_dyn_relocs *p; if (h->root.type == bfd_link_hash_indirect) return TRUE; info = (struct bfd_link_info *) inf; htab = tilepro_elf_hash_table (info); BFD_ASSERT (htab != NULL); if (htab->elf.dynamic_sections_created && h->plt.refcount > 0) { /* Make sure this symbol is output as a dynamic symbol. Undefined weak syms won't yet be marked as dynamic. */ if (h->dynindx == -1 && !h->forced_local) { if (! bfd_elf_link_record_dynamic_symbol (info, h)) return FALSE; } if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) { asection *s = htab->elf.splt; /* Allocate room for the header. */ if (s->size == 0) { s->size = PLT_HEADER_SIZE; } h->plt.offset = s->size; /* If this symbol is not defined in a regular file, and we are not generating a shared library, then set the symbol to this location in the .plt. This is required to make function pointers compare as equal between the normal executable and the shared library. */ if (! info->shared && !h->def_regular) { h->root.u.def.section = s; h->root.u.def.value = h->plt.offset; } /* Make room for this entry. */ s->size += PLT_ENTRY_SIZE; /* We also need to make an entry in the .got.plt section. */ htab->elf.sgotplt->size += GOT_ENTRY_SIZE; /* We also need to make an entry in the .rela.plt section. */ htab->elf.srelplt->size += TILEPRO_ELF_RELA_BYTES; } else { h->plt.offset = (bfd_vma) -1; h->needs_plt = 0; } } else { h->plt.offset = (bfd_vma) -1; h->needs_plt = 0; } /* If a TLS_IE symbol is now local to the binary, make it a TLS_LE requiring no TLS entry. */ if (h->got.refcount > 0 && !info->shared && h->dynindx == -1 && tilepro_elf_hash_entry(h)->tls_type == GOT_TLS_IE) h->got.offset = (bfd_vma) -1; else if (h->got.refcount > 0) { asection *s; bfd_boolean dyn; int tls_type = tilepro_elf_hash_entry(h)->tls_type; /* Make sure this symbol is output as a dynamic symbol. Undefined weak syms won't yet be marked as dynamic. */ if (h->dynindx == -1 && !h->forced_local) { if (! bfd_elf_link_record_dynamic_symbol (info, h)) return FALSE; } s = htab->elf.sgot; h->got.offset = s->size; s->size += TILEPRO_BYTES_PER_WORD; /* R_TILEPRO_IMM16_Xn_TLS_GD entries need 2 consecutive GOT slots. */ if (tls_type == GOT_TLS_GD) s->size += TILEPRO_BYTES_PER_WORD; dyn = htab->elf.dynamic_sections_created; /* R_TILEPRO_IMM16_Xn_TLS_IE_xxx needs one dynamic relocation, R_TILEPRO_IMM16_Xn_TLS_GD_xxx needs two if local symbol and two if global. */ if (tls_type == GOT_TLS_GD || tls_type == GOT_TLS_IE) htab->elf.srelgot->size += 2 * TILEPRO_ELF_RELA_BYTES; else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)) htab->elf.srelgot->size += TILEPRO_ELF_RELA_BYTES; } else h->got.offset = (bfd_vma) -1; eh = (struct tilepro_elf_link_hash_entry *) h; if (eh->dyn_relocs == NULL) return TRUE; /* In the shared -Bsymbolic case, discard space allocated for dynamic pc-relative relocs against symbols which turn out to be defined in regular objects. For the normal shared case, discard space for pc-relative relocs that have become local due to symbol visibility changes. */ if (info->shared) { if (SYMBOL_CALLS_LOCAL (info, h)) { struct tilepro_elf_dyn_relocs **pp; for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) { p->count -= p->pc_count; p->pc_count = 0; if (p->count == 0) *pp = p->next; else pp = &p->next; } } /* Also discard relocs on undefined weak syms with non-default visibility. */ if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak) { if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) eh->dyn_relocs = NULL; /* Make sure undefined weak symbols are output as a dynamic symbol in PIEs. */ else if (h->dynindx == -1 && !h->forced_local) { if (! bfd_elf_link_record_dynamic_symbol (info, h)) return FALSE; } } } else { /* For the non-shared case, discard space for relocs against symbols which turn out to need copy relocs or are not dynamic. */ if (!h->non_got_ref && ((h->def_dynamic && !h->def_regular) || (htab->elf.dynamic_sections_created && (h->root.type == bfd_link_hash_undefweak || h->root.type == bfd_link_hash_undefined)))) { /* Make sure this symbol is output as a dynamic symbol. Undefined weak syms won't yet be marked as dynamic. */ if (h->dynindx == -1 && !h->forced_local) { if (! bfd_elf_link_record_dynamic_symbol (info, h)) return FALSE; } /* If that succeeded, we know we'll be keeping all the relocs. */ if (h->dynindx != -1) goto keep; } eh->dyn_relocs = NULL; keep: ; } /* Finally, allocate space. */ for (p = eh->dyn_relocs; p != NULL; p = p->next) { asection *sreloc = elf_section_data (p->sec)->sreloc; sreloc->size += p->count * TILEPRO_ELF_RELA_BYTES; } return TRUE; } /* Find any dynamic relocs that apply to read-only sections. */ static bfd_boolean readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) { struct tilepro_elf_link_hash_entry *eh; struct tilepro_elf_dyn_relocs *p; eh = (struct tilepro_elf_link_hash_entry *) h; for (p = eh->dyn_relocs; p != NULL; p = p->next) { asection *s = p->sec->output_section; if (s != NULL && (s->flags & SEC_READONLY) != 0) { struct bfd_link_info *info = (struct bfd_link_info *) inf; info->flags |= DF_TEXTREL; /* Not an error, just cut short the traversal. */ return FALSE; } } return TRUE; } /* Return true if the dynamic symbol for a given section should be omitted when creating a shared library. */ static bfd_boolean tilepro_elf_omit_section_dynsym (bfd *output_bfd, struct bfd_link_info *info, asection *p) { /* We keep the .got section symbol so that explicit relocations against the _GLOBAL_OFFSET_TABLE_ symbol emitted in PIC mode can be turned into relocations against the .got symbol. */ if (strcmp (p->name, ".got") == 0) return FALSE; return _bfd_elf_link_omit_section_dynsym (output_bfd, info, p); } /* Set the sizes of the dynamic sections. */ #define ELF32_DYNAMIC_INTERPRETER "/lib/ld.so.1" static bfd_boolean tilepro_elf_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) { (void)output_bfd; struct tilepro_elf_link_hash_table *htab; bfd *dynobj; asection *s; bfd *ibfd; htab = tilepro_elf_hash_table (info); BFD_ASSERT (htab != NULL); dynobj = htab->elf.dynobj; BFD_ASSERT (dynobj != NULL); if (elf_hash_table (info)->dynamic_sections_created) { /* Set the contents of the .interp section to the interpreter. */ if (info->executable) { s = bfd_get_section_by_name (dynobj, ".interp"); BFD_ASSERT (s != NULL); s->size = sizeof ELF32_DYNAMIC_INTERPRETER; s->contents = (unsigned char *) ELF32_DYNAMIC_INTERPRETER; } } /* Set up .got offsets for local syms, and space for local dynamic relocs. */ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) { bfd_signed_vma *local_got; bfd_signed_vma *end_local_got; char *local_tls_type; bfd_size_type locsymcount; Elf_Internal_Shdr *symtab_hdr; asection *srel; if (! is_tilepro_elf (ibfd)) continue; for (s = ibfd->sections; s != NULL; s = s->next) { struct tilepro_elf_dyn_relocs *p; for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) { if (!bfd_is_abs_section (p->sec) && bfd_is_abs_section (p->sec->output_section)) { /* Input section has been discarded, either because it is a copy of a linkonce section or due to linker script /DISCARD/, so we'll be discarding the relocs too. */ } else if (p->count != 0) { srel = elf_section_data (p->sec)->sreloc; srel->size += p->count * TILEPRO_ELF_RELA_BYTES; if ((p->sec->output_section->flags & SEC_READONLY) != 0) info->flags |= DF_TEXTREL; } } } local_got = elf_local_got_refcounts (ibfd); if (!local_got) continue; symtab_hdr = &elf_symtab_hdr (ibfd); locsymcount = symtab_hdr->sh_info; end_local_got = local_got + locsymcount; local_tls_type = _bfd_tilepro_elf_local_got_tls_type (ibfd); s = htab->elf.sgot; srel = htab->elf.srelgot; for (; local_got < end_local_got; ++local_got, ++local_tls_type) { if (*local_got > 0) { *local_got = s->size; s->size += TILEPRO_BYTES_PER_WORD; if (*local_tls_type == GOT_TLS_GD) s->size += TILEPRO_BYTES_PER_WORD; if (info->shared || *local_tls_type == GOT_TLS_GD || *local_tls_type == GOT_TLS_IE) srel->size += TILEPRO_ELF_RELA_BYTES; } else *local_got = (bfd_vma) -1; } } /* Allocate global sym .plt and .got entries, and space for global sym dynamic relocs. */ elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); if (elf_hash_table (info)->dynamic_sections_created) { /* If the .got section is more than 0x8000 bytes, we add 0x8000 to the value of _GLOBAL_OFFSET_TABLE_, so that 16 bit relocations have a greater chance of working. */ if (htab->elf.sgot->size >= 0x8000 && elf_hash_table (info)->hgot->root.u.def.value == 0) elf_hash_table (info)->hgot->root.u.def.value = 0x8000; } if (htab->elf.sgotplt) { struct elf_link_hash_entry *got; got = elf_link_hash_lookup (elf_hash_table (info), "_GLOBAL_OFFSET_TABLE_", FALSE, FALSE, FALSE); /* Don't allocate .got.plt section if there are no GOT nor PLT entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ if ((got == NULL || !got->ref_regular_nonweak) && (htab->elf.sgotplt->size == GOTPLT_HEADER_SIZE) && (htab->elf.splt == NULL || htab->elf.splt->size == 0) && (htab->elf.sgot == NULL || (htab->elf.sgot->size == get_elf_backend_data (output_bfd)->got_header_size))) htab->elf.sgotplt->size = 0; } /* The check_relocs and adjust_dynamic_symbol entry points have determined the sizes of the various dynamic sections. Allocate memory for them. */ for (s = dynobj->sections; s != NULL; s = s->next) { if ((s->flags & SEC_LINKER_CREATED) == 0) continue; if (s == htab->elf.splt || s == htab->elf.sgot || s == htab->elf.sgotplt || s == htab->sdynbss) { /* Strip this section if we don't need it; see the comment below. */ } else if (strncmp (s->name, ".rela", 5) == 0) { if (s->size != 0) { /* We use the reloc_count field as a counter if we need to copy relocs into the output file. */ s->reloc_count = 0; } } else { /* It's not one of our sections. */ continue; } if (s->size == 0) { /* If we don't need this section, strip it from the output file. This is mostly to handle .rela.bss and .rela.plt. We must create both sections in create_dynamic_sections, because they must be created before the linker maps input sections to output sections. The linker does that before adjust_dynamic_symbol is called, and it is that function which decides whether anything needs to go into these sections. */ s->flags |= SEC_EXCLUDE; continue; } if ((s->flags & SEC_HAS_CONTENTS) == 0) continue; /* Allocate memory for the section contents. Zero the memory for the benefit of .rela.plt, which has 4 unused entries at the beginning, and we don't want garbage. */ s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); if (s->contents == NULL) return FALSE; } if (elf_hash_table (info)->dynamic_sections_created) { /* Add some entries to the .dynamic section. We fill in the values later, in tilepro_elf_finish_dynamic_sections, but we must add the entries now so that we get the correct size for the .dynamic section. The DT_DEBUG entry is filled in by the dynamic linker and used by the debugger. */ #define add_dynamic_entry(TAG, VAL) \ _bfd_elf_add_dynamic_entry (info, TAG, VAL) if (info->executable) { if (!add_dynamic_entry (DT_DEBUG, 0)) return FALSE; } if (htab->elf.srelplt->size != 0) { if (!add_dynamic_entry (DT_PLTGOT, 0) || !add_dynamic_entry (DT_PLTRELSZ, 0) || !add_dynamic_entry (DT_PLTREL, DT_RELA) || !add_dynamic_entry (DT_JMPREL, 0)) return FALSE; } if (!add_dynamic_entry (DT_RELA, 0) || !add_dynamic_entry (DT_RELASZ, 0) || !add_dynamic_entry (DT_RELAENT, TILEPRO_ELF_RELA_BYTES)) return FALSE; /* If any dynamic relocs apply to a read-only section, then we need a DT_TEXTREL entry. */ if ((info->flags & DF_TEXTREL) == 0) elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info); if (info->flags & DF_TEXTREL) { if (!add_dynamic_entry (DT_TEXTREL, 0)) return FALSE; } } #undef add_dynamic_entry return TRUE; } /* Return the base VMA address which should be subtracted from real addresses when resolving @dtpoff relocation. This is PT_TLS segment p_vaddr. */ static bfd_vma dtpoff_base (struct bfd_link_info *info) { /* If tls_sec is NULL, we should have signalled an error already. */ if (elf_hash_table (info)->tls_sec == NULL) return 0; return elf_hash_table (info)->tls_sec->vma; } /* Return the relocation value for R_TILEPRO_TLS_TPOFF32. */ static bfd_vma tpoff (struct bfd_link_info *info, bfd_vma address) { struct elf_link_hash_table *htab = elf_hash_table (info); /* If tls_sec is NULL, we should have signalled an error already. */ if (htab->tls_sec == NULL) return 0; return (address - htab->tls_sec->vma); } /* Replace the MASK bits in ADDR with those in INSN, for the next TILEPRO_BUNDLE_SIZE_IN_BYTES bytes. */ static void tilepro_replace_insn (bfd_byte *addr, const bfd_byte *mask, const bfd_byte *insn) { int i; for (i = 0; i < TILEPRO_BUNDLE_SIZE_IN_BYTES; i++) { addr[i] = (addr[i] & ~mask[i]) | (insn[i] & mask[i]); } } /* Mask to extract the bits corresponding to an instruction in a specific pipe of a bundle. */ static const bfd_byte insn_mask_X1[] = { 0x00, 0x00, 0x00, 0x80, 0xff, 0xff, 0xff, 0x7f }; /* Mask to extract the bits corresponding to an instruction in a specific pipe of a bundle, minus the destination operand and the first source operand. */ static const bfd_byte insn_mask_X0_no_dest_no_srca[] = { 0x00, 0xf0, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00 }; static const bfd_byte insn_mask_X1_no_dest_no_srca[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0xff, 0x7f }; static const bfd_byte insn_mask_Y0_no_dest_no_srca[] = { 0x00, 0xf0, 0x0f, 0x78, 0x00, 0x00, 0x00, 0x00 }; static const bfd_byte insn_mask_Y1_no_dest_no_srca[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x07, 0x78 }; /* Mask to extract the first source operand of an instruction. */ static const bfd_byte srca_mask_X0[] = { 0xc0, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static const bfd_byte srca_mask_X1[] = { 0x00, 0x00, 0x00, 0x00, 0xe0, 0x07, 0x00, 0x00 }; /* Various instructions synthesized to support tls references. */ /* move r0, r0 in the X1 pipe, used for tls le. */ static const bfd_byte insn_tls_le_move_X1[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x33, 0x08 }; /* move r0, zero in the X0 and X1 pipe, used for tls le. */ static const bfd_byte insn_tls_le_move_zero_X0X1[] = { 0xc0, 0xff, 0xcf, 0x00, 0xe0, 0xff, 0x33, 0x08 }; /* lw r0, r0 in the X1 pipe, used for tls ie. */ static const bfd_byte insn_tls_ie_lw_X1[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x70, 0x0b, 0x40 }; /* add r0, r0, tp in various pipes, used for tls ie. */ static const bfd_byte insn_tls_ie_add_X0X1[] = { 0x00, 0x50, 0x0f, 0x00, 0x00, 0xa8, 0x07, 0x08 }; static const bfd_byte insn_tls_ie_add_Y0Y1[] = { 0x00, 0x50, 0x03, 0x08, 0x00, 0xa8, 0x01, 0x8c }; /* move r0, r0 in various pipes, used for tls gd. */ static const bfd_byte insn_tls_gd_add_X0X1[] = { 0x00, 0xf0, 0xcf, 0x00, 0x00, 0xf8, 0x33, 0x08 }; static const bfd_byte insn_tls_gd_add_Y0Y1[] = { 0x00, 0xf0, 0x0b, 0x18, 0x00, 0xf8, 0x05, 0x9c }; /* Relocate an TILEPRO ELF section. The RELOCATE_SECTION function is called by the new ELF backend linker to handle the relocations for a section. The relocs are always passed as Rela structures. This function is responsible for adjusting the section contents as necessary, and (if generating a relocatable output file) adjusting the reloc addend as necessary. This function does not have to worry about setting the reloc address or the reloc symbol index. LOCAL_SYMS is a pointer to the swapped in local symbols. LOCAL_SECTIONS is an array giving the section in the input file corresponding to the st_shndx field of each local symbol. The global hash table entry for the global symbols can be found via elf_sym_hashes (input_bfd). When generating relocatable output, this function must handle STB_LOCAL/STT_SECTION symbols specially. The output symbol is going to be the section symbol corresponding to the output section, which means that the addend must be adjusted accordingly. */ static bfd_boolean tilepro_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd, asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms, asection **local_sections) { struct tilepro_elf_link_hash_table *htab; Elf_Internal_Shdr *symtab_hdr; struct elf_link_hash_entry **sym_hashes; bfd_vma *local_got_offsets; bfd_vma got_base; asection *sreloc; Elf_Internal_Rela *rel; Elf_Internal_Rela *relend; int num_relocs; htab = tilepro_elf_hash_table (info); BFD_ASSERT (htab != NULL); symtab_hdr = &elf_symtab_hdr (input_bfd); sym_hashes = elf_sym_hashes (input_bfd); local_got_offsets = elf_local_got_offsets (input_bfd); if (elf_hash_table (info)->hgot == NULL) got_base = 0; else got_base = elf_hash_table (info)->hgot->root.u.def.value; sreloc = elf_section_data (input_section)->sreloc; rel = relocs; num_relocs = input_section->reloc_count; relend = relocs + num_relocs; for (; rel < relend; rel++) { int r_type, tls_type; bfd_boolean is_tls_iele, is_tls_le; reloc_howto_type *howto; unsigned long r_symndx; struct elf_link_hash_entry *h; Elf_Internal_Sym *sym; tilepro_create_func create_func; asection *sec; bfd_vma relocation; bfd_reloc_status_type r; const char *name; bfd_vma off; bfd_boolean is_plt = FALSE; bfd_boolean unresolved_reloc; r_type = ELF32_R_TYPE (rel->r_info); if (r_type == R_TILEPRO_GNU_VTINHERIT || r_type == R_TILEPRO_GNU_VTENTRY) continue; if ((unsigned int)r_type >= NELEMS(tilepro_elf_howto_table)) { /* Not clear if we need to check here, but just be paranoid. */ (*_bfd_error_handler) (_("%B: unrecognized relocation (0x%x) in section `%A'"), input_bfd, r_type, input_section); bfd_set_error (bfd_error_bad_value); return FALSE; } howto = tilepro_elf_howto_table + r_type; /* This is a final link. */ r_symndx = ELF32_R_SYM (rel->r_info); h = NULL; sym = NULL; sec = NULL; unresolved_reloc = FALSE; if (r_symndx < symtab_hdr->sh_info) { sym = local_syms + r_symndx; sec = local_sections[r_symndx]; relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); } else { bfd_boolean warned; RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, r_symndx, symtab_hdr, sym_hashes, h, sec, relocation, unresolved_reloc, warned); if (warned) { /* To avoid generating warning messages about truncated relocations, set the relocation's address to be the same as the start of this section. */ if (input_section->output_section != NULL) relocation = input_section->output_section->vma; else relocation = 0; } } if (sec != NULL && elf_discarded_section (sec)) RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, rel, relend, howto, contents); if (info->relocatable) continue; if (h != NULL) name = h->root.root.string; else { name = (bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, sym->st_name)); if (name == NULL || *name == '\0') name = bfd_section_name (input_bfd, sec); } switch (r_type) { case R_TILEPRO_TLS_GD_CALL: case R_TILEPRO_IMM8_X0_TLS_GD_ADD: case R_TILEPRO_IMM8_Y0_TLS_GD_ADD: case R_TILEPRO_IMM8_X1_TLS_GD_ADD: case R_TILEPRO_IMM8_Y1_TLS_GD_ADD: case R_TILEPRO_IMM16_X0_TLS_GD_HA: case R_TILEPRO_IMM16_X1_TLS_GD_HA: case R_TILEPRO_IMM16_X0_TLS_IE_HA: case R_TILEPRO_IMM16_X1_TLS_IE_HA: tls_type = GOT_UNKNOWN; if (h == NULL && local_got_offsets) tls_type = _bfd_tilepro_elf_local_got_tls_type (input_bfd) [r_symndx]; else if (h != NULL) tls_type = tilepro_elf_hash_entry(h)->tls_type; is_tls_iele = (! info->shared || tls_type == GOT_TLS_IE); is_tls_le = is_tls_iele && (!info->shared && (h == NULL || h->dynindx == -1)); if (r_type == R_TILEPRO_TLS_GD_CALL) { if (is_tls_le) { /* GD -> LE */ tilepro_replace_insn (contents + rel->r_offset, insn_mask_X1, insn_tls_le_move_X1); continue; } else if (is_tls_iele) { /* GD -> IE */ tilepro_replace_insn (contents + rel->r_offset, insn_mask_X1, insn_tls_ie_lw_X1); continue; } /* GD -> GD */ h = (struct elf_link_hash_entry *) bfd_link_hash_lookup (info->hash, "__tls_get_addr", FALSE, FALSE, TRUE); BFD_ASSERT (h != NULL); r_type = R_TILEPRO_JOFFLONG_X1_PLT; howto = tilepro_elf_howto_table + r_type; } else if (r_type == R_TILEPRO_IMM16_X0_TLS_GD_HA || r_type == R_TILEPRO_IMM16_X0_TLS_IE_HA) { if (is_tls_le) tilepro_replace_insn (contents + rel->r_offset, srca_mask_X0, insn_tls_le_move_zero_X0X1); } else if (r_type == R_TILEPRO_IMM16_X1_TLS_GD_HA || r_type == R_TILEPRO_IMM16_X1_TLS_IE_HA) { if (is_tls_le) tilepro_replace_insn (contents + rel->r_offset, srca_mask_X1, insn_tls_le_move_zero_X0X1); } else { const bfd_byte *mask = NULL; const bfd_byte *add_insn = NULL; switch (r_type) { case R_TILEPRO_IMM8_X0_TLS_GD_ADD: add_insn = is_tls_iele ? insn_tls_ie_add_X0X1 : insn_tls_gd_add_X0X1; mask = insn_mask_X0_no_dest_no_srca; break; case R_TILEPRO_IMM8_X1_TLS_GD_ADD: add_insn = is_tls_iele ? insn_tls_ie_add_X0X1 : insn_tls_gd_add_X0X1; mask = insn_mask_X1_no_dest_no_srca; break; case R_TILEPRO_IMM8_Y0_TLS_GD_ADD: add_insn = is_tls_iele ? insn_tls_ie_add_Y0Y1 : insn_tls_gd_add_Y0Y1; mask = insn_mask_Y0_no_dest_no_srca; break; case R_TILEPRO_IMM8_Y1_TLS_GD_ADD: add_insn = is_tls_iele ? insn_tls_ie_add_Y0Y1 : insn_tls_gd_add_Y0Y1; mask = insn_mask_Y1_no_dest_no_srca; break; } tilepro_replace_insn (contents + rel->r_offset, mask, add_insn); continue; } break; case R_TILEPRO_TLS_IE_LOAD: if (!info->shared && (h == NULL || h->dynindx == -1)) /* IE -> LE */ tilepro_replace_insn (contents + rel->r_offset, insn_mask_X1_no_dest_no_srca, insn_tls_le_move_X1); else /* IE -> IE */ tilepro_replace_insn (contents + rel->r_offset, insn_mask_X1_no_dest_no_srca, insn_tls_ie_lw_X1); continue; break; default: break; } switch (r_type) { case R_TILEPRO_IMM16_X0_GOT: case R_TILEPRO_IMM16_X1_GOT: case R_TILEPRO_IMM16_X0_GOT_LO: case R_TILEPRO_IMM16_X1_GOT_LO: case R_TILEPRO_IMM16_X0_GOT_HI: case R_TILEPRO_IMM16_X1_GOT_HI: case R_TILEPRO_IMM16_X0_GOT_HA: case R_TILEPRO_IMM16_X1_GOT_HA: /* Relocation is to the entry for this symbol in the global offset table. */ if (htab->elf.sgot == NULL) abort (); if (h != NULL) { bfd_boolean dyn; off = h->got.offset; BFD_ASSERT (off != (bfd_vma) -1); dyn = elf_hash_table (info)->dynamic_sections_created; if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) || (info->shared && SYMBOL_REFERENCES_LOCAL (info, h))) { /* This is actually a static link, or it is a -Bsymbolic link and the symbol is defined locally, or the symbol was forced to be local because of a version file. We must initialize this entry in the global offset table. Since the offset must always be a multiple of 4 for 32-bit, we use the least significant bit to record whether we have initialized it already. When doing a dynamic link, we create a .rela.got relocation entry to initialize the value. This is done in the finish_dynamic_symbol routine. */ if ((off & 1) != 0) off &= ~1; else { bfd_put_32 (output_bfd, relocation, htab->elf.sgot->contents + off); h->got.offset |= 1; } } else unresolved_reloc = FALSE; } else { BFD_ASSERT (local_got_offsets != NULL && local_got_offsets[r_symndx] != (bfd_vma) -1); off = local_got_offsets[r_symndx]; /* The offset must always be a multiple of 4 on 32-bit. We use the least significant bit to record whether we have already processed this entry. */ if ((off & 1) != 0) off &= ~1; else { if (info->shared) { asection *s; Elf_Internal_Rela outrel; /* We need to generate a R_TILEPRO_RELATIVE reloc for the dynamic linker. */ s = htab->elf.srelgot; BFD_ASSERT (s != NULL); outrel.r_offset = (htab->elf.sgot->output_section->vma + htab->elf.sgot->output_offset + off); outrel.r_info = ELF32_R_INFO (0, R_TILEPRO_RELATIVE); outrel.r_addend = relocation; relocation = 0; tilepro_elf_append_rela_32 (output_bfd, s, &outrel); } bfd_put_32 (output_bfd, relocation, htab->elf.sgot->contents + off); local_got_offsets[r_symndx] |= 1; } } relocation = htab->elf.sgot->output_offset + off - got_base; break; case R_TILEPRO_JOFFLONG_X1_PLT: /* Relocation is to the entry for this symbol in the procedure linkage table. */ BFD_ASSERT (h != NULL); if (h->plt.offset == (bfd_vma) -1 || htab->elf.splt == NULL) { /* We didn't make a PLT entry for this symbol. This happens when statically linking PIC code, or when using -Bsymbolic. */ break; } relocation = (htab->elf.splt->output_section->vma + htab->elf.splt->output_offset + h->plt.offset); unresolved_reloc = FALSE; break; case R_TILEPRO_32_PCREL: case R_TILEPRO_16_PCREL: case R_TILEPRO_8_PCREL: case R_TILEPRO_IMM16_X0_PCREL: case R_TILEPRO_IMM16_X1_PCREL: case R_TILEPRO_IMM16_X0_LO_PCREL: case R_TILEPRO_IMM16_X1_LO_PCREL: case R_TILEPRO_IMM16_X0_HI_PCREL: case R_TILEPRO_IMM16_X1_HI_PCREL: case R_TILEPRO_IMM16_X0_HA_PCREL: case R_TILEPRO_IMM16_X1_HA_PCREL: if (h != NULL && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) break; /* Fall through. */ case R_TILEPRO_32: case R_TILEPRO_16: case R_TILEPRO_8: case R_TILEPRO_LO16: case R_TILEPRO_HI16: case R_TILEPRO_HA16: case R_TILEPRO_COPY: case R_TILEPRO_GLOB_DAT: case R_TILEPRO_JMP_SLOT: case R_TILEPRO_RELATIVE: case R_TILEPRO_BROFF_X1: case R_TILEPRO_JOFFLONG_X1: case R_TILEPRO_IMM8_X0: case R_TILEPRO_IMM8_Y0: case R_TILEPRO_IMM8_X1: case R_TILEPRO_IMM8_Y1: case R_TILEPRO_DEST_IMM8_X1: case R_TILEPRO_MT_IMM15_X1: case R_TILEPRO_MF_IMM15_X1: case R_TILEPRO_IMM16_X0: case R_TILEPRO_IMM16_X1: case R_TILEPRO_IMM16_X0_LO: case R_TILEPRO_IMM16_X1_LO: case R_TILEPRO_IMM16_X0_HI: case R_TILEPRO_IMM16_X1_HI: case R_TILEPRO_IMM16_X0_HA: case R_TILEPRO_IMM16_X1_HA: case R_TILEPRO_MMSTART_X0: case R_TILEPRO_MMEND_X0: case R_TILEPRO_MMSTART_X1: case R_TILEPRO_MMEND_X1: case R_TILEPRO_SHAMT_X0: case R_TILEPRO_SHAMT_X1: case R_TILEPRO_SHAMT_Y0: case R_TILEPRO_SHAMT_Y1: if ((input_section->flags & SEC_ALLOC) == 0) break; if ((info->shared && (h == NULL || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT || h->root.type != bfd_link_hash_undefweak) && (! howto->pc_relative || !SYMBOL_CALLS_LOCAL (info, h))) || (!info->shared && h != NULL && h->dynindx != -1 && !h->non_got_ref && ((h->def_dynamic && !h->def_regular) || h->root.type == bfd_link_hash_undefweak || h->root.type == bfd_link_hash_undefined))) { Elf_Internal_Rela outrel; bfd_boolean skip, relocate = FALSE; /* When generating a shared object, these relocations are copied into the output file to be resolved at run time. */ BFD_ASSERT (sreloc != NULL); skip = FALSE; outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, input_section, rel->r_offset); if (outrel.r_offset == (bfd_vma) -1) skip = TRUE; else if (outrel.r_offset == (bfd_vma) -2) skip = TRUE, relocate = TRUE; outrel.r_offset += (input_section->output_section->vma + input_section->output_offset); switch (r_type) { case R_TILEPRO_32_PCREL: case R_TILEPRO_16_PCREL: case R_TILEPRO_8_PCREL: /* If the symbol is not dynamic, we should not keep a dynamic relocation. But an .rela.* slot has been allocated for it, output R_TILEPRO_NONE. FIXME: Add code tracking needed dynamic relocs as e.g. i386 has. */ if (h->dynindx == -1) skip = TRUE, relocate = TRUE; break; } if (skip) memset (&outrel, 0, sizeof outrel); /* h->dynindx may be -1 if the symbol was marked to become local. */ else if (h != NULL && h->dynindx != -1 && (! is_plt || !info->shared || !SYMBOLIC_BIND (info, h) || !h->def_regular)) { BFD_ASSERT (h->dynindx != -1); outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); outrel.r_addend = rel->r_addend; } else { if (r_type == R_TILEPRO_32) { outrel.r_info = ELF32_R_INFO (0, R_TILEPRO_RELATIVE); outrel.r_addend = relocation + rel->r_addend; } else { long indx; outrel.r_addend = relocation + rel->r_addend; if (is_plt) sec = htab->elf.splt; if (bfd_is_abs_section (sec)) indx = 0; else if (sec == NULL || sec->owner == NULL) { bfd_set_error (bfd_error_bad_value); return FALSE; } else { asection *osec; /* We are turning this relocation into one against a section symbol. It would be proper to subtract the symbol's value, osec->vma, from the emitted reloc addend, but ld.so expects buggy relocs. */ osec = sec->output_section; indx = elf_section_data (osec)->dynindx; if (indx == 0) { osec = htab->elf.text_index_section; indx = elf_section_data (osec)->dynindx; } /* FIXME: we really should be able to link non-pic shared libraries. */ if (indx == 0) { BFD_FAIL (); (*_bfd_error_handler) (_("%B: probably compiled without -fPIC?"), input_bfd); bfd_set_error (bfd_error_bad_value); return FALSE; } } outrel.r_info = ELF32_R_INFO (indx, r_type); } } tilepro_elf_append_rela_32 (output_bfd, sreloc, &outrel); /* This reloc will be computed at runtime, so there's no need to do anything now. */ if (! relocate) continue; } break; case R_TILEPRO_IMM16_X0_TLS_LE: case R_TILEPRO_IMM16_X1_TLS_LE: case R_TILEPRO_IMM16_X0_TLS_LE_LO: case R_TILEPRO_IMM16_X1_TLS_LE_LO: case R_TILEPRO_IMM16_X0_TLS_LE_HI: case R_TILEPRO_IMM16_X1_TLS_LE_HI: case R_TILEPRO_IMM16_X0_TLS_LE_HA: case R_TILEPRO_IMM16_X1_TLS_LE_HA: if (info->shared) { Elf_Internal_Rela outrel; bfd_boolean skip; BFD_ASSERT (sreloc != NULL); skip = FALSE; outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, input_section, rel->r_offset); if (outrel.r_offset == (bfd_vma) -1) skip = TRUE; else if (outrel.r_offset == (bfd_vma) -2) skip = TRUE; outrel.r_offset += (input_section->output_section->vma + input_section->output_offset); if (skip) memset (&outrel, 0, sizeof outrel); else { outrel.r_info = ELF32_R_INFO (0, r_type); outrel.r_addend = relocation - dtpoff_base (info) + rel->r_addend; } tilepro_elf_append_rela_32 (output_bfd, sreloc, &outrel); continue; } relocation = tpoff (info, relocation); break; case R_TILEPRO_IMM16_X0_TLS_GD: case R_TILEPRO_IMM16_X1_TLS_GD: case R_TILEPRO_IMM16_X0_TLS_GD_LO: case R_TILEPRO_IMM16_X1_TLS_GD_LO: case R_TILEPRO_IMM16_X0_TLS_GD_HI: case R_TILEPRO_IMM16_X1_TLS_GD_HI: case R_TILEPRO_IMM16_X0_TLS_GD_HA: case R_TILEPRO_IMM16_X1_TLS_GD_HA: case R_TILEPRO_IMM16_X0_TLS_IE: case R_TILEPRO_IMM16_X1_TLS_IE: case R_TILEPRO_IMM16_X0_TLS_IE_LO: case R_TILEPRO_IMM16_X1_TLS_IE_LO: case R_TILEPRO_IMM16_X0_TLS_IE_HI: case R_TILEPRO_IMM16_X1_TLS_IE_HI: case R_TILEPRO_IMM16_X0_TLS_IE_HA: case R_TILEPRO_IMM16_X1_TLS_IE_HA: r_type = tilepro_elf_tls_transition (info, r_type, h == NULL); tls_type = GOT_UNKNOWN; if (h == NULL && local_got_offsets) tls_type = _bfd_tilepro_elf_local_got_tls_type (input_bfd) [r_symndx]; else if (h != NULL) { tls_type = tilepro_elf_hash_entry(h)->tls_type; if (!info->shared && h->dynindx == -1 && tls_type == GOT_TLS_IE) r_type = tilepro_tls_translate_to_le (r_type); } if (tls_type == GOT_TLS_IE) r_type = tilepro_tls_translate_to_ie (r_type); if (r_type == R_TILEPRO_IMM16_X0_TLS_LE || r_type == R_TILEPRO_IMM16_X1_TLS_LE || r_type == R_TILEPRO_IMM16_X0_TLS_LE_LO || r_type == R_TILEPRO_IMM16_X1_TLS_LE_LO || r_type == R_TILEPRO_IMM16_X0_TLS_LE_HI || r_type == R_TILEPRO_IMM16_X1_TLS_LE_HI || r_type == R_TILEPRO_IMM16_X0_TLS_LE_HA || r_type == R_TILEPRO_IMM16_X1_TLS_LE_HA) { relocation = tpoff (info, relocation); break; } if (h != NULL) { off = h->got.offset; h->got.offset |= 1; } else { BFD_ASSERT (local_got_offsets != NULL); off = local_got_offsets[r_symndx]; local_got_offsets[r_symndx] |= 1; } if (htab->elf.sgot == NULL) abort (); if ((off & 1) != 0) off &= ~1; else { Elf_Internal_Rela outrel; int indx = 0; bfd_boolean need_relocs = FALSE; if (htab->elf.srelgot == NULL) abort (); if (h != NULL) { bfd_boolean dyn; dyn = htab->elf.dynamic_sections_created; if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) && (!info->shared || !SYMBOL_REFERENCES_LOCAL (info, h))) { indx = h->dynindx; } } /* The GOT entries have not been initialized yet. Do it now, and emit any relocations. */ if ((info->shared || indx != 0) && (h == NULL || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT || h->root.type != bfd_link_hash_undefweak)) need_relocs = TRUE; switch (r_type) { case R_TILEPRO_IMM16_X0_TLS_IE: case R_TILEPRO_IMM16_X1_TLS_IE: case R_TILEPRO_IMM16_X0_TLS_IE_LO: case R_TILEPRO_IMM16_X1_TLS_IE_LO: case R_TILEPRO_IMM16_X0_TLS_IE_HI: case R_TILEPRO_IMM16_X1_TLS_IE_HI: case R_TILEPRO_IMM16_X0_TLS_IE_HA: case R_TILEPRO_IMM16_X1_TLS_IE_HA: if (need_relocs) { bfd_put_32 (output_bfd, 0, htab->elf.sgot->contents + off); outrel.r_offset = (htab->elf.sgot->output_section->vma + htab->elf.sgot->output_offset + off); outrel.r_addend = 0; if (indx == 0) outrel.r_addend = relocation - dtpoff_base (info); outrel.r_info = ELF32_R_INFO (indx, R_TILEPRO_TLS_TPOFF32); tilepro_elf_append_rela_32 (output_bfd, htab->elf.srelgot, &outrel); } else { bfd_put_32 (output_bfd, tpoff (info, relocation), htab->elf.sgot->contents + off); } break; case R_TILEPRO_IMM16_X0_TLS_GD: case R_TILEPRO_IMM16_X1_TLS_GD: case R_TILEPRO_IMM16_X0_TLS_GD_LO: case R_TILEPRO_IMM16_X1_TLS_GD_LO: case R_TILEPRO_IMM16_X0_TLS_GD_HI: case R_TILEPRO_IMM16_X1_TLS_GD_HI: case R_TILEPRO_IMM16_X0_TLS_GD_HA: case R_TILEPRO_IMM16_X1_TLS_GD_HA: if (need_relocs) { outrel.r_offset = (htab->elf.sgot->output_section->vma + htab->elf.sgot->output_offset + off); outrel.r_addend = 0; outrel.r_info = ELF32_R_INFO (indx, R_TILEPRO_TLS_DTPMOD32); bfd_put_32 (output_bfd, 0, htab->elf.sgot->contents + off); tilepro_elf_append_rela_32 (output_bfd, htab->elf.srelgot, &outrel); if (indx == 0) { BFD_ASSERT (! unresolved_reloc); bfd_put_32 (output_bfd, relocation - dtpoff_base (info), (htab->elf.sgot->contents + off + TILEPRO_BYTES_PER_WORD)); } else { bfd_put_32 (output_bfd, 0, (htab->elf.sgot->contents + off + TILEPRO_BYTES_PER_WORD)); outrel.r_info = ELF32_R_INFO (indx, R_TILEPRO_TLS_DTPOFF32); outrel.r_offset += TILEPRO_BYTES_PER_WORD; tilepro_elf_append_rela_32 (output_bfd, htab->elf.srelgot, &outrel); } } else { /* If we are not emitting relocations for a general dynamic reference, then we must be in a static link or an executable link with the symbol binding locally. Mark it as belonging to module 1, the executable. */ bfd_put_32 (output_bfd, 1, htab->elf.sgot->contents + off ); bfd_put_32 (output_bfd, relocation - dtpoff_base (info), htab->elf.sgot->contents + off + TILEPRO_BYTES_PER_WORD); } break; } } if (off >= (bfd_vma) -2) abort (); relocation = htab->elf.sgot->output_offset + off - got_base; unresolved_reloc = FALSE; howto = tilepro_elf_howto_table + r_type; break; default: break; } /* Dynamic relocs are not propagated for SEC_DEBUGGING sections because such sections are not SEC_ALLOC and thus ld.so will not process them. */ if (unresolved_reloc && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic) && _bfd_elf_section_offset (output_bfd, info, input_section, rel->r_offset) != (bfd_vma) -1) (*_bfd_error_handler) (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), input_bfd, input_section, (long) rel->r_offset, howto->name, h->root.root.string); r = bfd_reloc_continue; /* For the _HA types, we add 0x8000 so that if bit 15 is set, * we will increment bit 16. The howto->rightshift takes care * of the rest for us. */ switch (r_type) { case R_TILEPRO_HA16: case R_TILEPRO_IMM16_X0_HA: case R_TILEPRO_IMM16_X1_HA: case R_TILEPRO_IMM16_X0_HA_PCREL: case R_TILEPRO_IMM16_X1_HA_PCREL: case R_TILEPRO_IMM16_X0_GOT_HA: case R_TILEPRO_IMM16_X1_GOT_HA: case R_TILEPRO_IMM16_X0_TLS_GD_HA: case R_TILEPRO_IMM16_X1_TLS_GD_HA: case R_TILEPRO_IMM16_X0_TLS_IE_HA: case R_TILEPRO_IMM16_X1_TLS_IE_HA: relocation += 0x8000; break; } /* Get the operand creation function, if any. */ create_func = reloc_to_create_func[r_type]; if (create_func == NULL) { r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents, rel->r_offset, relocation, rel->r_addend); } else { if (howto->pc_relative) { relocation -= input_section->output_section->vma + input_section->output_offset; if (howto->pcrel_offset) relocation -= rel->r_offset; } bfd_byte *data; /* Add the relocation addend if any to the final target value */ relocation += rel->r_addend; /* Do basic range checking */ r = bfd_check_overflow (howto->complain_on_overflow, howto->bitsize, howto->rightshift, 32, relocation); /* * Write the relocated value out into the raw section data. * Don't put a relocation out in the .rela section. */ tilepro_bundle_bits mask = create_func(-1); tilepro_bundle_bits value = create_func(relocation >> howto->rightshift); /* Only touch bytes while the mask is not 0, so we don't write to out of bounds memory if this is actually a 16-bit switch instruction. */ for (data = contents + rel->r_offset; mask != 0; data++) { bfd_byte byte_mask = (bfd_byte)mask; *data = (*data & ~byte_mask) | ((bfd_byte)value & byte_mask); mask >>= 8; value >>= 8; } } if (r != bfd_reloc_ok) { const char *msg = NULL; switch (r) { case bfd_reloc_overflow: r = info->callbacks->reloc_overflow (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0, input_bfd, input_section, rel->r_offset); break; case bfd_reloc_undefined: r = info->callbacks->undefined_symbol (info, name, input_bfd, input_section, rel->r_offset, TRUE); break; case bfd_reloc_outofrange: msg = _("internal error: out of range error"); break; case bfd_reloc_notsupported: msg = _("internal error: unsupported relocation error"); break; case bfd_reloc_dangerous: msg = _("internal error: dangerous relocation"); break; default: msg = _("internal error: unknown error"); break; } if (msg) r = info->callbacks->warning (info, msg, name, input_bfd, input_section, rel->r_offset); if (! r) return FALSE; } } return TRUE; } /* Finish up dynamic symbol handling. We set the contents of various dynamic sections here. */ static bfd_boolean tilepro_elf_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info, struct elf_link_hash_entry *h, Elf_Internal_Sym *sym) { struct tilepro_elf_link_hash_table *htab; htab = tilepro_elf_hash_table (info); BFD_ASSERT (htab != NULL); if (h->plt.offset != (bfd_vma) -1) { asection *splt; asection *srela; asection *sgotplt; Elf_Internal_Rela rela; bfd_byte *loc; bfd_vma r_offset; int rela_index; /* This symbol has an entry in the PLT. Set it up. */ BFD_ASSERT (h->dynindx != -1); splt = htab->elf.splt; srela = htab->elf.srelplt; sgotplt = htab->elf.sgotplt; if (splt == NULL || srela == NULL) abort (); /* Fill in the entry in the procedure linkage table. */ rela_index = tilepro_plt_entry_build (splt, sgotplt, h->plt.offset, &r_offset); /* Fill in the entry in the global offset table, which initially points to the beginning of the plt. */ bfd_put_32 (output_bfd, splt->output_section->vma + splt->output_offset, sgotplt->contents + r_offset); /* Fill in the entry in the .rela.plt section. */ rela.r_offset = (sgotplt->output_section->vma + sgotplt->output_offset + r_offset); rela.r_addend = 0; rela.r_info = ELF32_R_INFO (h->dynindx, R_TILEPRO_JMP_SLOT); loc = srela->contents + rela_index * sizeof (Elf32_External_Rela); bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); if (!h->def_regular) { /* Mark the symbol as undefined, rather than as defined in the .plt section. Leave the value alone. */ sym->st_shndx = SHN_UNDEF; /* If the symbol is weak, we do need to clear the value. Otherwise, the PLT entry would provide a definition for the symbol even if the symbol wasn't defined anywhere, and so the symbol would never be NULL. */ if (!h->ref_regular_nonweak) sym->st_value = 0; } } if (h->got.offset != (bfd_vma) -1 && tilepro_elf_hash_entry(h)->tls_type != GOT_TLS_GD && tilepro_elf_hash_entry(h)->tls_type != GOT_TLS_IE) { asection *sgot; asection *srela; Elf_Internal_Rela rela; /* This symbol has an entry in the GOT. Set it up. */ sgot = htab->elf.sgot; srela = htab->elf.srelgot; BFD_ASSERT (sgot != NULL && srela != NULL); rela.r_offset = (sgot->output_section->vma + sgot->output_offset + (h->got.offset &~ (bfd_vma) 1)); /* If this is a -Bsymbolic link, and the symbol is defined locally, we just want to emit a RELATIVE reloc. Likewise if the symbol was forced to be local because of a version file. The entry in the global offset table will already have been initialized in the relocate_section function. */ if (info->shared && (info->symbolic || h->dynindx == -1) && h->def_regular) { asection *sec = h->root.u.def.section; rela.r_info = ELF32_R_INFO (0, R_TILEPRO_RELATIVE); rela.r_addend = (h->root.u.def.value + sec->output_section->vma + sec->output_offset); } else { rela.r_info = ELF32_R_INFO (h->dynindx, R_TILEPRO_GLOB_DAT); rela.r_addend = 0; } bfd_put_32 (output_bfd, 0, sgot->contents + (h->got.offset & ~(bfd_vma) 1)); tilepro_elf_append_rela_32 (output_bfd, srela, &rela); } if (h->needs_copy) { asection *s; Elf_Internal_Rela rela; /* This symbols needs a copy reloc. Set it up. */ BFD_ASSERT (h->dynindx != -1); s = bfd_get_section_by_name (h->root.u.def.section->owner, ".rela.bss"); BFD_ASSERT (s != NULL); rela.r_offset = (h->root.u.def.value + h->root.u.def.section->output_section->vma + h->root.u.def.section->output_offset); rela.r_info = ELF32_R_INFO (h->dynindx, R_TILEPRO_COPY); rela.r_addend = 0; tilepro_elf_append_rela_32 (output_bfd, s, &rela); } /* Mark some specially defined symbols as absolute. */ if (strcmp (h->root.root.string, "_DYNAMIC") == 0 || (h == htab->elf.hgot || h == htab->elf.hplt)) sym->st_shndx = SHN_ABS; return TRUE; } /* Finish up the dynamic sections. */ static bfd_boolean tilepro_finish_dyn (bfd *output_bfd, struct bfd_link_info *info, bfd *dynobj, asection *sdyn, asection *splt ATTRIBUTE_UNUSED) { Elf32_External_Dyn *dyncon, *dynconend; struct tilepro_elf_link_hash_table *htab; htab = tilepro_elf_hash_table (info); BFD_ASSERT (htab != NULL); dyncon = (Elf32_External_Dyn *) sdyn->contents; dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); for (; dyncon < dynconend; dyncon++) { Elf_Internal_Dyn dyn; asection *s; bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); switch (dyn.d_tag) { case DT_PLTGOT: s = htab->elf.sgotplt; dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; break; case DT_JMPREL: s = htab->elf.srelplt; dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; break; case DT_PLTRELSZ: s = htab->elf.srelplt; dyn.d_un.d_val = s->size; break; default: continue; } bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); } return TRUE; } static bfd_boolean tilepro_elf_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) { bfd *dynobj; asection *sdyn; struct tilepro_elf_link_hash_table *htab; htab = tilepro_elf_hash_table (info); BFD_ASSERT (htab != NULL); dynobj = htab->elf.dynobj; sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); if (elf_hash_table (info)->dynamic_sections_created) { asection *splt; bfd_boolean ret; splt = bfd_get_section_by_name (dynobj, ".plt"); BFD_ASSERT (splt != NULL && sdyn != NULL); ret = tilepro_finish_dyn (output_bfd, info, dynobj, sdyn, splt); if (ret != TRUE) return ret; /* Fill in the first entry in the procedure linkage table. */ if (splt->size > 0) memcpy (splt->contents, tilepro_plt0_entry, PLT_HEADER_SIZE); elf_section_data (splt->output_section)->this_hdr.sh_entsize = PLT_ENTRY_SIZE; } if (htab->elf.sgotplt) { if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) { (*_bfd_error_handler) (_("discarded output section: `%A'"), htab->elf.sgotplt); return FALSE; } if (htab->elf.sgotplt->size > 0) { /* Write the first two entries in .got.plt, needed for the dynamic linker. */ bfd_put_32 (output_bfd, (bfd_vma) -1, htab->elf.sgotplt->contents); bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); } elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = GOT_ENTRY_SIZE; } if (htab->elf.sgot) { if (htab->elf.sgot->size > 0) { /* Set the first entry in the global offset table to the address of the dynamic section. */ bfd_vma val = (sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0); bfd_put_32 (output_bfd, val, htab->elf.sgot->contents); } elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = GOT_ENTRY_SIZE; } return TRUE; } /* Return address for Ith PLT stub in section PLT, for relocation REL or (bfd_vma) -1 if it should not be included. */ static bfd_vma tilepro_elf_plt_sym_val (bfd_vma i, const asection *plt, const arelent *rel ATTRIBUTE_UNUSED) { return plt->vma + PLT_HEADER_SIZE + i * PLT_ENTRY_SIZE; } static enum elf_reloc_type_class tilepro_reloc_type_class (const Elf_Internal_Rela *rela) { switch ((int) ELF32_R_TYPE (rela->r_info)) { case R_TILEPRO_RELATIVE: return reloc_class_relative; case R_TILEPRO_JMP_SLOT: return reloc_class_plt; case R_TILEPRO_COPY: return reloc_class_copy; default: return reloc_class_normal; } } static int tilepro_additional_program_headers (bfd *abfd, struct bfd_link_info *info ATTRIBUTE_UNUSED) { /* Each .intrpt section specified by the user adds another PT_LOAD header since the sections are discontiguous. */ static const char intrpt_sections[4][9] = { ".intrpt0", ".intrpt1", ".intrpt2", ".intrpt3" }; int count = 0; int i; for (i = 0; i < 4; i++) { asection *sec = bfd_get_section_by_name (abfd, intrpt_sections[i]); if (sec != NULL && (sec->flags & SEC_LOAD) != 0) ++count; } /* Add four "padding" headers in to leave room in case a custom linker script does something fancy. Otherwise ld complains that it ran out of program headers and refuses to link. */ count += 4; return count; } #define ELF_ARCH bfd_arch_tilepro #define ELF_TARGET_ID TILEPRO_ELF_DATA #define ELF_MACHINE_CODE EM_TILEPRO #define ELF_MAXPAGESIZE 0x10000 #define ELF_COMMONPAGESIZE 0x10000 #define TARGET_LITTLE_SYM bfd_elf32_tilepro_vec #define TARGET_LITTLE_NAME "elf32-tilepro" #define elf_backend_reloc_type_class tilepro_reloc_type_class #define bfd_elf32_bfd_reloc_name_lookup tilepro_reloc_name_lookup #define bfd_elf32_bfd_link_hash_table_create tilepro_elf_link_hash_table_create #define bfd_elf32_bfd_reloc_type_lookup tilepro_reloc_type_lookup #define elf_backend_copy_indirect_symbol tilepro_elf_copy_indirect_symbol #define elf_backend_create_dynamic_sections tilepro_elf_create_dynamic_sections #define elf_backend_check_relocs tilepro_elf_check_relocs #define elf_backend_adjust_dynamic_symbol tilepro_elf_adjust_dynamic_symbol #define elf_backend_omit_section_dynsym tilepro_elf_omit_section_dynsym #define elf_backend_size_dynamic_sections tilepro_elf_size_dynamic_sections #define elf_backend_relocate_section tilepro_elf_relocate_section #define elf_backend_finish_dynamic_symbol tilepro_elf_finish_dynamic_symbol #define elf_backend_finish_dynamic_sections tilepro_elf_finish_dynamic_sections #define elf_backend_gc_mark_hook tilepro_elf_gc_mark_hook #define elf_backend_gc_sweep_hook tilepro_elf_gc_sweep_hook #define elf_backend_plt_sym_val tilepro_elf_plt_sym_val #define elf_info_to_howto_rel NULL #define elf_info_to_howto tilepro_info_to_howto_rela #define elf_backend_grok_prstatus tilepro_elf_grok_prstatus #define elf_backend_grok_psinfo tilepro_elf_grok_psinfo #define elf_backend_additional_program_headers tilepro_additional_program_headers #define elf_backend_init_index_section _bfd_elf_init_1_index_section #define elf_backend_can_gc_sections 1 #define elf_backend_can_refcount 1 #define elf_backend_want_got_plt 1 #define elf_backend_plt_readonly 1 /* Align PLT mod 64 byte L2 line size. */ #define elf_backend_plt_alignment 6 #define elf_backend_want_plt_sym 1 #define elf_backend_got_header_size GOT_ENTRY_SIZE #define elf_backend_rela_normal 1 #define elf_backend_default_execstack 0 #include "elf32-target.h"