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markom |
/* M32R-specific support for 32-bit ELF.
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Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/m32r.h"
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static bfd_reloc_status_type m32r_elf_10_pcrel_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type m32r_elf_do_10_pcrel_reloc
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PARAMS ((bfd *, reloc_howto_type *, asection *,
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bfd_byte *, bfd_vma, asection *, bfd_vma, bfd_vma));
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static bfd_reloc_status_type m32r_elf_hi16_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static void m32r_elf_relocate_hi16
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PARAMS ((bfd *, int, Elf_Internal_Rela *, Elf_Internal_Rela *,
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bfd_byte *, bfd_vma));
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bfd_reloc_status_type m32r_elf_lo16_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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bfd_reloc_status_type m32r_elf_generic_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type m32r_elf_sda16_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
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static void m32r_info_to_howto_rel
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
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boolean _bfd_m32r_elf_section_from_bfd_section
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PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *));
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void _bfd_m32r_elf_symbol_processing
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PARAMS ((bfd *, asymbol *));
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static boolean m32r_elf_add_symbol_hook
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PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
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const char **, flagword *, asection **, bfd_vma *));
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static boolean m32r_elf_relocate_section
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
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Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
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#if 0 /* not yet */
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static boolean m32r_elf_relax_delete_bytes
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PARAMS ((bfd *, asection *, bfd_vma, int));
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#endif
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static bfd_reloc_status_type m32r_elf_final_sda_base
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PARAMS ((bfd *, struct bfd_link_info *, const char **, bfd_vma *));
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static boolean m32r_elf_object_p
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PARAMS ((bfd *));
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static void m32r_elf_final_write_processing
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PARAMS ((bfd *, boolean));
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static boolean m32r_elf_set_private_flags
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PARAMS ((bfd *, flagword));
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static boolean m32r_elf_copy_private_bfd_data
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PARAMS ((bfd *, bfd *));
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static boolean m32r_elf_merge_private_bfd_data
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PARAMS ((bfd *, bfd *));
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static boolean m32r_elf_print_private_bfd_data
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PARAMS ((bfd *, PTR));
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#define NOP_INSN 0x7000
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#define MAKE_PARALLEL(insn) ((insn) | 0x8000)
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/* Use REL instead of RELA to save space.
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This only saves space in libraries and object files, but perhaps
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relocs will be put in ROM? All in all though, REL relocs are a pain
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to work with. */
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#define USE_REL
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static reloc_howto_type m32r_elf_howto_table[] =
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{
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/* This reloc does nothing. */
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HOWTO (R_M32R_NONE, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M32R_NONE", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* A 16 bit absolute relocation. */
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HOWTO (R_M32R_16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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m32r_elf_generic_reloc,/* special_function */
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"R_M32R_16", /* name */
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true, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 32 bit absolute relocation. */
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HOWTO (R_M32R_32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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m32r_elf_generic_reloc,/* special_function */
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"R_M32R_32", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 24 bit address. */
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HOWTO (R_M32R_24, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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24, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_unsigned, /* complain_on_overflow */
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m32r_elf_generic_reloc,/* special_function */
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"R_M32R_24", /* name */
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true, /* partial_inplace */
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0xffffff, /* src_mask */
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0xffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* An PC Relative 10-bit relocation, shifted by 2.
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This reloc is complicated because relocations are relative to pc & -4.
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i.e. branches in the right insn slot use the address of the left insn
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slot for pc. */
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/* ??? It's not clear whether this should have partial_inplace set or not.
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Branch relaxing in the assembler can store the addend in the insn,
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and if bfd_install_relocation gets called the addend may get added
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again. */
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HOWTO (R_M32R_10_PCREL, /* type */
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2, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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10, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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m32r_elf_10_pcrel_reloc, /* special_function */
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"R_M32R_10_PCREL", /* name */
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false, /* partial_inplace */
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0xff, /* src_mask */
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0xff, /* dst_mask */
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true), /* pcrel_offset */
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/* A relative 18 bit relocation, right shifted by 2. */
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HOWTO (R_M32R_18_PCREL, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M32R_18_PCREL", /* name */
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false, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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true), /* pcrel_offset */
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/* A relative 26 bit relocation, right shifted by 2. */
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/* ??? It's not clear whether this should have partial_inplace set or not.
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Branch relaxing in the assembler can store the addend in the insn,
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and if bfd_install_relocation gets called the addend may get added
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again. */
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HOWTO (R_M32R_26_PCREL, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M32R_26_PCREL", /* name */
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false, /* partial_inplace */
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0xffffff, /* src_mask */
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0xffffff, /* dst_mask */
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true), /* pcrel_offset */
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/* High 16 bits of address when lower 16 is or'd in. */
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HOWTO (R_M32R_HI16_ULO, /* type */
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16, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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m32r_elf_hi16_reloc, /* special_function */
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"R_M32R_HI16_ULO", /* name */
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true, /* partial_inplace */
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0x0000ffff, /* src_mask */
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0x0000ffff, /* dst_mask */
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false), /* pcrel_offset */
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/* High 16 bits of address when lower 16 is added in. */
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HOWTO (R_M32R_HI16_SLO, /* type */
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16, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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m32r_elf_hi16_reloc, /* special_function */
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"R_M32R_HI16_SLO", /* name */
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true, /* partial_inplace */
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0x0000ffff, /* src_mask */
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0x0000ffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Lower 16 bits of address. */
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HOWTO (R_M32R_LO16, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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m32r_elf_lo16_reloc, /* special_function */
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"R_M32R_LO16", /* name */
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true, /* partial_inplace */
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0x0000ffff, /* src_mask */
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0x0000ffff, /* dst_mask */
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false), /* pcrel_offset */
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248 |
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/* Small data area 16 bits offset. */
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HOWTO (R_M32R_SDA16, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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254 |
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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256 |
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m32r_elf_sda16_reloc, /* special_function */
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257 |
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"R_M32R_SDA16", /* name */
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true, /* partial_inplace */ /* FIXME: correct? */
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259 |
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0x0000ffff, /* src_mask */
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260 |
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0x0000ffff, /* dst_mask */
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261 |
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false), /* pcrel_offset */
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262 |
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263 |
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/* GNU extension to record C++ vtable hierarchy */
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HOWTO (R_M32R_GNU_VTINHERIT, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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267 |
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0, /* bitsize */
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268 |
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false, /* pc_relative */
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269 |
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0, /* bitpos */
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270 |
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complain_overflow_dont, /* complain_on_overflow */
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271 |
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NULL, /* special_function */
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272 |
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"R_M32R_GNU_VTINHERIT", /* name */
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273 |
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false, /* partial_inplace */
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274 |
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0, /* src_mask */
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275 |
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0, /* dst_mask */
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276 |
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false), /* pcrel_offset */
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277 |
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278 |
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/* GNU extension to record C++ vtable member usage */
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279 |
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HOWTO (R_M32R_GNU_VTENTRY, /* type */
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280 |
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0, /* rightshift */
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281 |
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2, /* size (0 = byte, 1 = short, 2 = long) */
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282 |
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0, /* bitsize */
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283 |
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false, /* pc_relative */
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284 |
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0, /* bitpos */
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285 |
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complain_overflow_dont, /* complain_on_overflow */
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286 |
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_bfd_elf_rel_vtable_reloc_fn, /* special_function */
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287 |
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"R_M32R_GNU_VTENTRY", /* name */
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288 |
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false, /* partial_inplace */
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289 |
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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};
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294 |
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295 |
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/* Handle the R_M32R_10_PCREL reloc. */
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296 |
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297 |
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static bfd_reloc_status_type
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298 |
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m32r_elf_10_pcrel_reloc (abfd, reloc_entry, symbol, data,
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input_section, output_bfd, error_message)
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bfd * abfd;
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301 |
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arelent * reloc_entry;
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asymbol * symbol;
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PTR data;
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304 |
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asection * input_section;
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305 |
|
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bfd * output_bfd;
|
306 |
|
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char ** error_message ATTRIBUTE_UNUSED;
|
307 |
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{
|
308 |
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/* This part is from bfd_elf_generic_reloc. */
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309 |
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if (output_bfd != (bfd *) NULL
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310 |
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&& (symbol->flags & BSF_SECTION_SYM) == 0
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311 |
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&& (! reloc_entry->howto->partial_inplace
|
312 |
|
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|| reloc_entry->addend == 0))
|
313 |
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{
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314 |
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reloc_entry->address += input_section->output_offset;
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315 |
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return bfd_reloc_ok;
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316 |
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}
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317 |
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318 |
|
|
if (output_bfd != NULL)
|
319 |
|
|
{
|
320 |
|
|
/* FIXME: See bfd_perform_relocation. Is this right? */
|
321 |
|
|
return bfd_reloc_continue;
|
322 |
|
|
}
|
323 |
|
|
|
324 |
|
|
return m32r_elf_do_10_pcrel_reloc (abfd, reloc_entry->howto,
|
325 |
|
|
input_section,
|
326 |
|
|
data, reloc_entry->address,
|
327 |
|
|
symbol->section,
|
328 |
|
|
(symbol->value
|
329 |
|
|
+ symbol->section->output_section->vma
|
330 |
|
|
+ symbol->section->output_offset),
|
331 |
|
|
reloc_entry->addend);
|
332 |
|
|
}
|
333 |
|
|
|
334 |
|
|
/* Utility to actually perform an R_M32R_10_PCREL reloc. */
|
335 |
|
|
|
336 |
|
|
static bfd_reloc_status_type
|
337 |
|
|
m32r_elf_do_10_pcrel_reloc (abfd, howto, input_section, data, offset,
|
338 |
|
|
symbol_section, symbol_value, addend)
|
339 |
|
|
bfd *abfd;
|
340 |
|
|
reloc_howto_type *howto;
|
341 |
|
|
asection *input_section;
|
342 |
|
|
bfd_byte *data;
|
343 |
|
|
bfd_vma offset;
|
344 |
|
|
asection *symbol_section ATTRIBUTE_UNUSED;
|
345 |
|
|
bfd_vma symbol_value;
|
346 |
|
|
bfd_vma addend;
|
347 |
|
|
{
|
348 |
|
|
bfd_signed_vma relocation;
|
349 |
|
|
unsigned long x;
|
350 |
|
|
bfd_reloc_status_type status;
|
351 |
|
|
|
352 |
|
|
/* Sanity check the address (offset in section). */
|
353 |
|
|
if (offset > input_section->_cooked_size)
|
354 |
|
|
return bfd_reloc_outofrange;
|
355 |
|
|
|
356 |
|
|
relocation = symbol_value + addend;
|
357 |
|
|
/* Make it pc relative. */
|
358 |
|
|
relocation -= (input_section->output_section->vma
|
359 |
|
|
+ input_section->output_offset);
|
360 |
|
|
/* These jumps mask off the lower two bits of the current address
|
361 |
|
|
before doing pcrel calculations. */
|
362 |
|
|
relocation -= (offset & -4L);
|
363 |
|
|
|
364 |
|
|
if (relocation < -0x200 || relocation > 0x1ff)
|
365 |
|
|
status = bfd_reloc_overflow;
|
366 |
|
|
else
|
367 |
|
|
status = bfd_reloc_ok;
|
368 |
|
|
|
369 |
|
|
x = bfd_get_16 (abfd, data + offset);
|
370 |
|
|
relocation >>= howto->rightshift;
|
371 |
|
|
relocation <<= howto->bitpos;
|
372 |
|
|
x = (x & ~howto->dst_mask) | (((x & howto->src_mask) + relocation) & howto->dst_mask);
|
373 |
|
|
bfd_put_16 (abfd, x, data + offset);
|
374 |
|
|
|
375 |
|
|
return status;
|
376 |
|
|
}
|
377 |
|
|
|
378 |
|
|
/* Handle the R_M32R_HI16_[SU]LO relocs.
|
379 |
|
|
HI16_SLO is for the add3 and load/store with displacement instructions.
|
380 |
|
|
HI16_ULO is for the or3 instruction.
|
381 |
|
|
For R_M32R_HI16_SLO, the lower 16 bits are sign extended when added to
|
382 |
|
|
the high 16 bytes so if the lower 16 bits are negative (bit 15 == 1) then
|
383 |
|
|
we must add one to the high 16 bytes (which will get subtracted off when
|
384 |
|
|
the low 16 bits are added).
|
385 |
|
|
These relocs have to be done in combination with an R_M32R_LO16 reloc
|
386 |
|
|
because there is a carry from the LO16 to the HI16. Here we just save
|
387 |
|
|
the information we need; we do the actual relocation when we see the LO16.
|
388 |
|
|
This code is copied from the elf32-mips.c. We also support an arbitrary
|
389 |
|
|
number of HI16 relocs to be associated with a single LO16 reloc. The
|
390 |
|
|
assembler sorts the relocs to ensure each HI16 immediately precedes its
|
391 |
|
|
LO16. However if there are multiple copies, the assembler may not find
|
392 |
|
|
the real LO16 so it picks the first one it finds. */
|
393 |
|
|
|
394 |
|
|
struct m32r_hi16
|
395 |
|
|
{
|
396 |
|
|
struct m32r_hi16 *next;
|
397 |
|
|
bfd_byte *addr;
|
398 |
|
|
bfd_vma addend;
|
399 |
|
|
};
|
400 |
|
|
|
401 |
|
|
/* FIXME: This should not be a static variable. */
|
402 |
|
|
|
403 |
|
|
static struct m32r_hi16 *m32r_hi16_list;
|
404 |
|
|
|
405 |
|
|
static bfd_reloc_status_type
|
406 |
|
|
m32r_elf_hi16_reloc (abfd, reloc_entry, symbol, data,
|
407 |
|
|
input_section, output_bfd, error_message)
|
408 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
409 |
|
|
arelent *reloc_entry;
|
410 |
|
|
asymbol *symbol;
|
411 |
|
|
PTR data;
|
412 |
|
|
asection *input_section;
|
413 |
|
|
bfd *output_bfd;
|
414 |
|
|
char **error_message ATTRIBUTE_UNUSED;
|
415 |
|
|
{
|
416 |
|
|
bfd_reloc_status_type ret;
|
417 |
|
|
bfd_vma relocation;
|
418 |
|
|
struct m32r_hi16 *n;
|
419 |
|
|
|
420 |
|
|
/* This part is from bfd_elf_generic_reloc.
|
421 |
|
|
If we're relocating, and this an external symbol, we don't want
|
422 |
|
|
to change anything. */
|
423 |
|
|
if (output_bfd != (bfd *) NULL
|
424 |
|
|
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
425 |
|
|
&& reloc_entry->addend == 0)
|
426 |
|
|
{
|
427 |
|
|
reloc_entry->address += input_section->output_offset;
|
428 |
|
|
return bfd_reloc_ok;
|
429 |
|
|
}
|
430 |
|
|
|
431 |
|
|
/* Sanity check the address (offset in section). */
|
432 |
|
|
if (reloc_entry->address > input_section->_cooked_size)
|
433 |
|
|
return bfd_reloc_outofrange;
|
434 |
|
|
|
435 |
|
|
ret = bfd_reloc_ok;
|
436 |
|
|
if (bfd_is_und_section (symbol->section)
|
437 |
|
|
&& output_bfd == (bfd *) NULL)
|
438 |
|
|
ret = bfd_reloc_undefined;
|
439 |
|
|
|
440 |
|
|
if (bfd_is_com_section (symbol->section))
|
441 |
|
|
relocation = 0;
|
442 |
|
|
else
|
443 |
|
|
relocation = symbol->value;
|
444 |
|
|
|
445 |
|
|
relocation += symbol->section->output_section->vma;
|
446 |
|
|
relocation += symbol->section->output_offset;
|
447 |
|
|
relocation += reloc_entry->addend;
|
448 |
|
|
|
449 |
|
|
/* Save the information, and let LO16 do the actual relocation. */
|
450 |
|
|
n = (struct m32r_hi16 *) bfd_malloc (sizeof *n);
|
451 |
|
|
if (n == NULL)
|
452 |
|
|
return bfd_reloc_outofrange;
|
453 |
|
|
n->addr = (bfd_byte *) data + reloc_entry->address;
|
454 |
|
|
n->addend = relocation;
|
455 |
|
|
n->next = m32r_hi16_list;
|
456 |
|
|
m32r_hi16_list = n;
|
457 |
|
|
|
458 |
|
|
if (output_bfd != (bfd *) NULL)
|
459 |
|
|
reloc_entry->address += input_section->output_offset;
|
460 |
|
|
|
461 |
|
|
return ret;
|
462 |
|
|
}
|
463 |
|
|
|
464 |
|
|
/* Handle an M32R ELF HI16 reloc. */
|
465 |
|
|
|
466 |
|
|
static void
|
467 |
|
|
m32r_elf_relocate_hi16 (input_bfd, type, relhi, rello, contents, addend)
|
468 |
|
|
bfd *input_bfd;
|
469 |
|
|
int type;
|
470 |
|
|
Elf_Internal_Rela *relhi;
|
471 |
|
|
Elf_Internal_Rela *rello;
|
472 |
|
|
bfd_byte *contents;
|
473 |
|
|
bfd_vma addend;
|
474 |
|
|
{
|
475 |
|
|
unsigned long insn;
|
476 |
|
|
bfd_vma addlo;
|
477 |
|
|
|
478 |
|
|
insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
|
479 |
|
|
|
480 |
|
|
addlo = bfd_get_32 (input_bfd, contents + rello->r_offset);
|
481 |
|
|
if (type == R_M32R_HI16_SLO)
|
482 |
|
|
addlo = ((addlo & 0xffff) ^ 0x8000) - 0x8000;
|
483 |
|
|
else
|
484 |
|
|
addlo &= 0xffff;
|
485 |
|
|
|
486 |
|
|
addend += ((insn & 0xffff) << 16) + addlo;
|
487 |
|
|
|
488 |
|
|
/* Reaccount for sign extension of low part. */
|
489 |
|
|
if (type == R_M32R_HI16_SLO
|
490 |
|
|
&& (addend & 0x8000) != 0)
|
491 |
|
|
addend += 0x10000;
|
492 |
|
|
|
493 |
|
|
bfd_put_32 (input_bfd,
|
494 |
|
|
(insn & 0xffff0000) | ((addend >> 16) & 0xffff),
|
495 |
|
|
contents + relhi->r_offset);
|
496 |
|
|
}
|
497 |
|
|
|
498 |
|
|
/* Do an R_M32R_LO16 relocation. This is a straightforward 16 bit
|
499 |
|
|
inplace relocation; this function exists in order to do the
|
500 |
|
|
R_M32R_HI16_[SU]LO relocation described above. */
|
501 |
|
|
|
502 |
|
|
bfd_reloc_status_type
|
503 |
|
|
m32r_elf_lo16_reloc (input_bfd, reloc_entry, symbol, data,
|
504 |
|
|
input_section, output_bfd, error_message)
|
505 |
|
|
bfd *input_bfd;
|
506 |
|
|
arelent *reloc_entry;
|
507 |
|
|
asymbol *symbol;
|
508 |
|
|
PTR data;
|
509 |
|
|
asection *input_section;
|
510 |
|
|
bfd *output_bfd;
|
511 |
|
|
char **error_message;
|
512 |
|
|
{
|
513 |
|
|
/* This part is from bfd_elf_generic_reloc.
|
514 |
|
|
If we're relocating, and this an external symbol, we don't want
|
515 |
|
|
to change anything. */
|
516 |
|
|
if (output_bfd != (bfd *) NULL
|
517 |
|
|
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
518 |
|
|
&& reloc_entry->addend == 0)
|
519 |
|
|
{
|
520 |
|
|
reloc_entry->address += input_section->output_offset;
|
521 |
|
|
return bfd_reloc_ok;
|
522 |
|
|
}
|
523 |
|
|
|
524 |
|
|
if (m32r_hi16_list != NULL)
|
525 |
|
|
{
|
526 |
|
|
struct m32r_hi16 *l;
|
527 |
|
|
|
528 |
|
|
l = m32r_hi16_list;
|
529 |
|
|
while (l != NULL)
|
530 |
|
|
{
|
531 |
|
|
unsigned long insn;
|
532 |
|
|
unsigned long val;
|
533 |
|
|
unsigned long vallo;
|
534 |
|
|
struct m32r_hi16 *next;
|
535 |
|
|
|
536 |
|
|
/* Do the HI16 relocation. Note that we actually don't need
|
537 |
|
|
to know anything about the LO16 itself, except where to
|
538 |
|
|
find the low 16 bits of the addend needed by the LO16. */
|
539 |
|
|
insn = bfd_get_32 (input_bfd, l->addr);
|
540 |
|
|
vallo = ((bfd_get_32 (input_bfd, (bfd_byte *) data + reloc_entry->address)
|
541 |
|
|
& 0xffff) ^ 0x8000) - 0x8000;
|
542 |
|
|
val = ((insn & 0xffff) << 16) + vallo;
|
543 |
|
|
val += l->addend;
|
544 |
|
|
|
545 |
|
|
/* Reaccount for sign extension of low part. */
|
546 |
|
|
if ((val & 0x8000) != 0)
|
547 |
|
|
val += 0x10000;
|
548 |
|
|
|
549 |
|
|
insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff);
|
550 |
|
|
bfd_put_32 (input_bfd, insn, l->addr);
|
551 |
|
|
|
552 |
|
|
next = l->next;
|
553 |
|
|
free (l);
|
554 |
|
|
l = next;
|
555 |
|
|
}
|
556 |
|
|
|
557 |
|
|
m32r_hi16_list = NULL;
|
558 |
|
|
}
|
559 |
|
|
|
560 |
|
|
/* Now do the LO16 reloc in the usual way.
|
561 |
|
|
??? It would be nice to call bfd_elf_generic_reloc here,
|
562 |
|
|
but we have partial_inplace == TRUE. bfd_elf_generic_reloc will
|
563 |
|
|
pass the handling back to bfd_install_relocation which will install
|
564 |
|
|
a section relative addend which is wrong. */
|
565 |
|
|
return m32r_elf_generic_reloc (input_bfd, reloc_entry, symbol, data,
|
566 |
|
|
input_section, output_bfd, error_message);
|
567 |
|
|
}
|
568 |
|
|
|
569 |
|
|
/* Do generic partial_inplace relocation.
|
570 |
|
|
This is a local replacement for bfd_elf_generic_reloc. */
|
571 |
|
|
|
572 |
|
|
bfd_reloc_status_type
|
573 |
|
|
m32r_elf_generic_reloc (input_bfd, reloc_entry, symbol, data,
|
574 |
|
|
input_section, output_bfd, error_message)
|
575 |
|
|
bfd *input_bfd;
|
576 |
|
|
arelent *reloc_entry;
|
577 |
|
|
asymbol *symbol;
|
578 |
|
|
PTR data;
|
579 |
|
|
asection *input_section;
|
580 |
|
|
bfd *output_bfd;
|
581 |
|
|
char **error_message;
|
582 |
|
|
{
|
583 |
|
|
bfd_reloc_status_type ret;
|
584 |
|
|
bfd_vma relocation;
|
585 |
|
|
bfd_byte *inplace_address;
|
586 |
|
|
|
587 |
|
|
/* This part is from bfd_elf_generic_reloc.
|
588 |
|
|
If we're relocating, and this an external symbol, we don't want
|
589 |
|
|
to change anything. */
|
590 |
|
|
if (output_bfd != (bfd *) NULL
|
591 |
|
|
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
592 |
|
|
&& reloc_entry->addend == 0)
|
593 |
|
|
{
|
594 |
|
|
reloc_entry->address += input_section->output_offset;
|
595 |
|
|
return bfd_reloc_ok;
|
596 |
|
|
}
|
597 |
|
|
|
598 |
|
|
/* Now do the the reloc in the usual way.
|
599 |
|
|
??? It would be nice to call bfd_elf_generic_reloc here,
|
600 |
|
|
but we have partial_inplace == TRUE. bfd_elf_generic_reloc will
|
601 |
|
|
pass the handling back to bfd_install_relocation which will install
|
602 |
|
|
a section relative addend which is wrong. */
|
603 |
|
|
|
604 |
|
|
/* Sanity check the address (offset in section). */
|
605 |
|
|
if (reloc_entry->address > input_section->_cooked_size)
|
606 |
|
|
return bfd_reloc_outofrange;
|
607 |
|
|
|
608 |
|
|
ret = bfd_reloc_ok;
|
609 |
|
|
if (bfd_is_und_section (symbol->section)
|
610 |
|
|
&& output_bfd == (bfd *) NULL)
|
611 |
|
|
ret = bfd_reloc_undefined;
|
612 |
|
|
|
613 |
|
|
if (bfd_is_com_section (symbol->section)
|
614 |
|
|
|| output_bfd != (bfd *) NULL)
|
615 |
|
|
relocation = 0;
|
616 |
|
|
else
|
617 |
|
|
relocation = symbol->value;
|
618 |
|
|
|
619 |
|
|
/* Only do this for a final link. */
|
620 |
|
|
if (output_bfd == (bfd *) NULL)
|
621 |
|
|
{
|
622 |
|
|
relocation += symbol->section->output_section->vma;
|
623 |
|
|
relocation += symbol->section->output_offset;
|
624 |
|
|
}
|
625 |
|
|
|
626 |
|
|
relocation += reloc_entry->addend;
|
627 |
|
|
inplace_address = data + reloc_entry->address;
|
628 |
|
|
|
629 |
|
|
#define DOIT(x) \
|
630 |
|
|
x = ( (x & ~reloc_entry->howto->dst_mask) | \
|
631 |
|
|
(((x & reloc_entry->howto->src_mask) + relocation) & \
|
632 |
|
|
reloc_entry->howto->dst_mask))
|
633 |
|
|
|
634 |
|
|
switch (reloc_entry->howto->size)
|
635 |
|
|
{
|
636 |
|
|
case 1:
|
637 |
|
|
{
|
638 |
|
|
short x = bfd_get_16 (input_bfd, inplace_address);
|
639 |
|
|
DOIT (x);
|
640 |
|
|
bfd_put_16 (input_bfd, x, inplace_address);
|
641 |
|
|
}
|
642 |
|
|
break;
|
643 |
|
|
case 2:
|
644 |
|
|
{
|
645 |
|
|
unsigned long x = bfd_get_32 (input_bfd, inplace_address);
|
646 |
|
|
DOIT (x);
|
647 |
|
|
bfd_put_32 (input_bfd, x, inplace_address);
|
648 |
|
|
}
|
649 |
|
|
break;
|
650 |
|
|
default:
|
651 |
|
|
BFD_ASSERT (0);
|
652 |
|
|
}
|
653 |
|
|
|
654 |
|
|
if (output_bfd != (bfd *) NULL)
|
655 |
|
|
reloc_entry->address += input_section->output_offset;
|
656 |
|
|
|
657 |
|
|
return ret;
|
658 |
|
|
}
|
659 |
|
|
|
660 |
|
|
/* Handle the R_M32R_SDA16 reloc.
|
661 |
|
|
This reloc is used to compute the address of objects in the small data area
|
662 |
|
|
and to perform loads and stores from that area.
|
663 |
|
|
The lower 16 bits are sign extended and added to the register specified
|
664 |
|
|
in the instruction, which is assumed to point to _SDA_BASE_. */
|
665 |
|
|
|
666 |
|
|
static bfd_reloc_status_type
|
667 |
|
|
m32r_elf_sda16_reloc (abfd, reloc_entry, symbol, data,
|
668 |
|
|
input_section, output_bfd, error_message)
|
669 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
670 |
|
|
arelent *reloc_entry;
|
671 |
|
|
asymbol *symbol;
|
672 |
|
|
PTR data ATTRIBUTE_UNUSED;
|
673 |
|
|
asection *input_section;
|
674 |
|
|
bfd *output_bfd;
|
675 |
|
|
char **error_message ATTRIBUTE_UNUSED;
|
676 |
|
|
{
|
677 |
|
|
/* This part is from bfd_elf_generic_reloc. */
|
678 |
|
|
if (output_bfd != (bfd *) NULL
|
679 |
|
|
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
680 |
|
|
&& (! reloc_entry->howto->partial_inplace
|
681 |
|
|
|| reloc_entry->addend == 0))
|
682 |
|
|
{
|
683 |
|
|
reloc_entry->address += input_section->output_offset;
|
684 |
|
|
return bfd_reloc_ok;
|
685 |
|
|
}
|
686 |
|
|
|
687 |
|
|
if (output_bfd != NULL)
|
688 |
|
|
{
|
689 |
|
|
/* FIXME: See bfd_perform_relocation. Is this right? */
|
690 |
|
|
return bfd_reloc_continue;
|
691 |
|
|
}
|
692 |
|
|
|
693 |
|
|
/* FIXME: not sure what to do here yet. But then again, the linker
|
694 |
|
|
may never call us. */
|
695 |
|
|
abort ();
|
696 |
|
|
}
|
697 |
|
|
|
698 |
|
|
/* Map BFD reloc types to M32R ELF reloc types. */
|
699 |
|
|
|
700 |
|
|
struct m32r_reloc_map
|
701 |
|
|
{
|
702 |
|
|
bfd_reloc_code_real_type bfd_reloc_val;
|
703 |
|
|
unsigned char elf_reloc_val;
|
704 |
|
|
};
|
705 |
|
|
|
706 |
|
|
static const struct m32r_reloc_map m32r_reloc_map[] =
|
707 |
|
|
{
|
708 |
|
|
{ BFD_RELOC_NONE, R_M32R_NONE },
|
709 |
|
|
{ BFD_RELOC_16, R_M32R_16 },
|
710 |
|
|
{ BFD_RELOC_32, R_M32R_32 },
|
711 |
|
|
{ BFD_RELOC_M32R_24, R_M32R_24 },
|
712 |
|
|
{ BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL },
|
713 |
|
|
{ BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL },
|
714 |
|
|
{ BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL },
|
715 |
|
|
{ BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO },
|
716 |
|
|
{ BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO },
|
717 |
|
|
{ BFD_RELOC_M32R_LO16, R_M32R_LO16 },
|
718 |
|
|
{ BFD_RELOC_M32R_SDA16, R_M32R_SDA16 },
|
719 |
|
|
{ BFD_RELOC_VTABLE_INHERIT, R_M32R_GNU_VTINHERIT },
|
720 |
|
|
{ BFD_RELOC_VTABLE_ENTRY, R_M32R_GNU_VTENTRY },
|
721 |
|
|
};
|
722 |
|
|
|
723 |
|
|
static reloc_howto_type *
|
724 |
|
|
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
|
725 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
726 |
|
|
bfd_reloc_code_real_type code;
|
727 |
|
|
{
|
728 |
|
|
unsigned int i;
|
729 |
|
|
|
730 |
|
|
for (i = 0;
|
731 |
|
|
i < sizeof (m32r_reloc_map) / sizeof (struct m32r_reloc_map);
|
732 |
|
|
i++)
|
733 |
|
|
{
|
734 |
|
|
if (m32r_reloc_map[i].bfd_reloc_val == code)
|
735 |
|
|
return &m32r_elf_howto_table[m32r_reloc_map[i].elf_reloc_val];
|
736 |
|
|
}
|
737 |
|
|
|
738 |
|
|
return NULL;
|
739 |
|
|
}
|
740 |
|
|
|
741 |
|
|
/* Set the howto pointer for an M32R ELF reloc. */
|
742 |
|
|
|
743 |
|
|
static void
|
744 |
|
|
m32r_info_to_howto_rel (abfd, cache_ptr, dst)
|
745 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
746 |
|
|
arelent *cache_ptr;
|
747 |
|
|
Elf32_Internal_Rel *dst;
|
748 |
|
|
{
|
749 |
|
|
unsigned int r_type;
|
750 |
|
|
|
751 |
|
|
r_type = ELF32_R_TYPE (dst->r_info);
|
752 |
|
|
BFD_ASSERT (r_type < (unsigned int) R_M32R_max);
|
753 |
|
|
cache_ptr->howto = &m32r_elf_howto_table[r_type];
|
754 |
|
|
}
|
755 |
|
|
|
756 |
|
|
/* Given a BFD section, try to locate the corresponding ELF section
|
757 |
|
|
index. */
|
758 |
|
|
|
759 |
|
|
boolean
|
760 |
|
|
_bfd_m32r_elf_section_from_bfd_section (abfd, hdr, sec, retval)
|
761 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
762 |
|
|
Elf32_Internal_Shdr *hdr ATTRIBUTE_UNUSED;
|
763 |
|
|
asection *sec;
|
764 |
|
|
int *retval;
|
765 |
|
|
{
|
766 |
|
|
if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0)
|
767 |
|
|
{
|
768 |
|
|
*retval = SHN_M32R_SCOMMON;
|
769 |
|
|
return true;
|
770 |
|
|
}
|
771 |
|
|
return false;
|
772 |
|
|
}
|
773 |
|
|
|
774 |
|
|
/* M32R ELF uses two common sections. One is the usual one, and the other
|
775 |
|
|
is for small objects. All the small objects are kept together, and then
|
776 |
|
|
referenced via one register, which yields faster assembler code. It is
|
777 |
|
|
up to the compiler to emit an instruction to load the register with
|
778 |
|
|
_SDA_BASE. This is what we use for the small common section. This
|
779 |
|
|
approach is copied from elf32-mips.c. */
|
780 |
|
|
static asection m32r_elf_scom_section;
|
781 |
|
|
static asymbol m32r_elf_scom_symbol;
|
782 |
|
|
static asymbol *m32r_elf_scom_symbol_ptr;
|
783 |
|
|
|
784 |
|
|
/* Handle the special M32R section numbers that a symbol may use. */
|
785 |
|
|
|
786 |
|
|
void
|
787 |
|
|
_bfd_m32r_elf_symbol_processing (abfd, asym)
|
788 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
789 |
|
|
asymbol *asym;
|
790 |
|
|
{
|
791 |
|
|
elf_symbol_type *elfsym;
|
792 |
|
|
|
793 |
|
|
elfsym = (elf_symbol_type *) asym;
|
794 |
|
|
|
795 |
|
|
switch (elfsym->internal_elf_sym.st_shndx)
|
796 |
|
|
{
|
797 |
|
|
case SHN_M32R_SCOMMON:
|
798 |
|
|
if (m32r_elf_scom_section.name == NULL)
|
799 |
|
|
{
|
800 |
|
|
/* Initialize the small common section. */
|
801 |
|
|
m32r_elf_scom_section.name = ".scommon";
|
802 |
|
|
m32r_elf_scom_section.flags = SEC_IS_COMMON;
|
803 |
|
|
m32r_elf_scom_section.output_section = &m32r_elf_scom_section;
|
804 |
|
|
m32r_elf_scom_section.symbol = &m32r_elf_scom_symbol;
|
805 |
|
|
m32r_elf_scom_section.symbol_ptr_ptr = &m32r_elf_scom_symbol_ptr;
|
806 |
|
|
m32r_elf_scom_symbol.name = ".scommon";
|
807 |
|
|
m32r_elf_scom_symbol.flags = BSF_SECTION_SYM;
|
808 |
|
|
m32r_elf_scom_symbol.section = &m32r_elf_scom_section;
|
809 |
|
|
m32r_elf_scom_symbol_ptr = &m32r_elf_scom_symbol;
|
810 |
|
|
}
|
811 |
|
|
asym->section = &m32r_elf_scom_section;
|
812 |
|
|
asym->value = elfsym->internal_elf_sym.st_size;
|
813 |
|
|
break;
|
814 |
|
|
}
|
815 |
|
|
}
|
816 |
|
|
|
817 |
|
|
/* Hook called by the linker routine which adds symbols from an object
|
818 |
|
|
file. We must handle the special M32R section numbers here.
|
819 |
|
|
We also keep watching for whether we need to create the sdata special
|
820 |
|
|
linker sections. */
|
821 |
|
|
|
822 |
|
|
static boolean
|
823 |
|
|
m32r_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
|
824 |
|
|
bfd *abfd;
|
825 |
|
|
struct bfd_link_info *info;
|
826 |
|
|
const Elf_Internal_Sym *sym;
|
827 |
|
|
const char **namep;
|
828 |
|
|
flagword *flagsp ATTRIBUTE_UNUSED;
|
829 |
|
|
asection **secp;
|
830 |
|
|
bfd_vma *valp;
|
831 |
|
|
{
|
832 |
|
|
if (! info->relocateable
|
833 |
|
|
&& (*namep)[0] == '_' && (*namep)[1] == 'S'
|
834 |
|
|
&& strcmp (*namep, "_SDA_BASE_") == 0)
|
835 |
|
|
{
|
836 |
|
|
/* This is simpler than using _bfd_elf_create_linker_section
|
837 |
|
|
(our needs are simpler than ppc's needs). Also
|
838 |
|
|
_bfd_elf_create_linker_section currently has a bug where if a .sdata
|
839 |
|
|
section already exists a new one is created that follows it which
|
840 |
|
|
screws of _SDA_BASE_ address calcs because output_offset != 0. */
|
841 |
|
|
struct elf_link_hash_entry *h;
|
842 |
|
|
asection *s = bfd_get_section_by_name (abfd, ".sdata");
|
843 |
|
|
|
844 |
|
|
/* The following code was cobbled from elf32-ppc.c and elflink.c. */
|
845 |
|
|
|
846 |
|
|
if (s == NULL)
|
847 |
|
|
{
|
848 |
|
|
int flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
|
849 |
|
|
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
850 |
|
|
|
851 |
|
|
s = bfd_make_section_anyway (abfd, ".sdata");
|
852 |
|
|
if (s == NULL)
|
853 |
|
|
return false;
|
854 |
|
|
bfd_set_section_flags (abfd, s, flags);
|
855 |
|
|
bfd_set_section_alignment (abfd, s, 2);
|
856 |
|
|
}
|
857 |
|
|
|
858 |
|
|
h = (struct elf_link_hash_entry *)
|
859 |
|
|
bfd_link_hash_lookup (info->hash, "_SDA_BASE_", false, false, false);
|
860 |
|
|
|
861 |
|
|
if ((h == NULL || h->root.type == bfd_link_hash_undefined)
|
862 |
|
|
&& !(_bfd_generic_link_add_one_symbol (info,
|
863 |
|
|
abfd,
|
864 |
|
|
"_SDA_BASE_",
|
865 |
|
|
BSF_GLOBAL,
|
866 |
|
|
s,
|
867 |
|
|
32768,
|
868 |
|
|
(const char *) NULL,
|
869 |
|
|
false,
|
870 |
|
|
get_elf_backend_data (abfd)->collect,
|
871 |
|
|
(struct bfd_link_hash_entry **) &h)))
|
872 |
|
|
return false;
|
873 |
|
|
h->type = STT_OBJECT;
|
874 |
|
|
}
|
875 |
|
|
|
876 |
|
|
switch (sym->st_shndx)
|
877 |
|
|
{
|
878 |
|
|
case SHN_M32R_SCOMMON:
|
879 |
|
|
*secp = bfd_make_section_old_way (abfd, ".scommon");
|
880 |
|
|
(*secp)->flags |= SEC_IS_COMMON;
|
881 |
|
|
*valp = sym->st_size;
|
882 |
|
|
break;
|
883 |
|
|
}
|
884 |
|
|
|
885 |
|
|
return true;
|
886 |
|
|
}
|
887 |
|
|
|
888 |
|
|
/* We have to figure out the SDA_BASE value, so that we can adjust the
|
889 |
|
|
symbol value correctly. We look up the symbol _SDA_BASE_ in the output
|
890 |
|
|
BFD. If we can't find it, we're stuck. We cache it in the ELF
|
891 |
|
|
target data. We don't need to adjust the symbol value for an
|
892 |
|
|
external symbol if we are producing relocateable output. */
|
893 |
|
|
|
894 |
|
|
static bfd_reloc_status_type
|
895 |
|
|
m32r_elf_final_sda_base (output_bfd, info, error_message, psb)
|
896 |
|
|
bfd *output_bfd;
|
897 |
|
|
struct bfd_link_info *info;
|
898 |
|
|
const char **error_message;
|
899 |
|
|
bfd_vma *psb;
|
900 |
|
|
{
|
901 |
|
|
if (elf_gp (output_bfd) == 0)
|
902 |
|
|
{
|
903 |
|
|
struct bfd_link_hash_entry *h;
|
904 |
|
|
|
905 |
|
|
h = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", false, false, true);
|
906 |
|
|
if (h != (struct bfd_link_hash_entry *) NULL
|
907 |
|
|
&& h->type == bfd_link_hash_defined)
|
908 |
|
|
elf_gp (output_bfd) = (h->u.def.value
|
909 |
|
|
+ h->u.def.section->output_section->vma
|
910 |
|
|
+ h->u.def.section->output_offset);
|
911 |
|
|
else
|
912 |
|
|
{
|
913 |
|
|
/* Only get the error once. */
|
914 |
|
|
*psb = elf_gp (output_bfd) = 4;
|
915 |
|
|
*error_message =
|
916 |
|
|
(const char *) _("SDA relocation when _SDA_BASE_ not defined");
|
917 |
|
|
return bfd_reloc_dangerous;
|
918 |
|
|
}
|
919 |
|
|
}
|
920 |
|
|
*psb = elf_gp (output_bfd);
|
921 |
|
|
return bfd_reloc_ok;
|
922 |
|
|
}
|
923 |
|
|
|
924 |
|
|
/* Relocate an M32R/D ELF section.
|
925 |
|
|
There is some attempt to make this function usable for many architectures,
|
926 |
|
|
both USE_REL and USE_RELA ['twould be nice if such a critter existed],
|
927 |
|
|
if only to serve as a learning tool.
|
928 |
|
|
|
929 |
|
|
The RELOCATE_SECTION function is called by the new ELF backend linker
|
930 |
|
|
to handle the relocations for a section.
|
931 |
|
|
|
932 |
|
|
The relocs are always passed as Rela structures; if the section
|
933 |
|
|
actually uses Rel structures, the r_addend field will always be
|
934 |
|
|
zero.
|
935 |
|
|
|
936 |
|
|
This function is responsible for adjust the section contents as
|
937 |
|
|
necessary, and (if using Rela relocs and generating a
|
938 |
|
|
relocateable output file) adjusting the reloc addend as
|
939 |
|
|
necessary.
|
940 |
|
|
|
941 |
|
|
This function does not have to worry about setting the reloc
|
942 |
|
|
address or the reloc symbol index.
|
943 |
|
|
|
944 |
|
|
LOCAL_SYMS is a pointer to the swapped in local symbols.
|
945 |
|
|
|
946 |
|
|
LOCAL_SECTIONS is an array giving the section in the input file
|
947 |
|
|
corresponding to the st_shndx field of each local symbol.
|
948 |
|
|
|
949 |
|
|
The global hash table entry for the global symbols can be found
|
950 |
|
|
via elf_sym_hashes (input_bfd).
|
951 |
|
|
|
952 |
|
|
When generating relocateable output, this function must handle
|
953 |
|
|
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
|
954 |
|
|
going to be the section symbol corresponding to the output
|
955 |
|
|
section, which means that the addend must be adjusted
|
956 |
|
|
accordingly. */
|
957 |
|
|
|
958 |
|
|
static boolean
|
959 |
|
|
m32r_elf_relocate_section (output_bfd, info, input_bfd, input_section,
|
960 |
|
|
contents, relocs, local_syms, local_sections)
|
961 |
|
|
bfd *output_bfd ATTRIBUTE_UNUSED;
|
962 |
|
|
struct bfd_link_info *info;
|
963 |
|
|
bfd *input_bfd;
|
964 |
|
|
asection *input_section;
|
965 |
|
|
bfd_byte *contents;
|
966 |
|
|
Elf_Internal_Rela *relocs;
|
967 |
|
|
Elf_Internal_Sym *local_syms;
|
968 |
|
|
asection **local_sections;
|
969 |
|
|
{
|
970 |
|
|
Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
971 |
|
|
struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
|
972 |
|
|
Elf_Internal_Rela *rel, *relend;
|
973 |
|
|
/* Assume success. */
|
974 |
|
|
boolean ret = true;
|
975 |
|
|
|
976 |
|
|
rel = relocs;
|
977 |
|
|
relend = relocs + input_section->reloc_count;
|
978 |
|
|
for (; rel < relend; rel++)
|
979 |
|
|
{
|
980 |
|
|
int r_type;
|
981 |
|
|
reloc_howto_type *howto;
|
982 |
|
|
unsigned long r_symndx;
|
983 |
|
|
/* We can't modify r_addend here as elf_link_input_bfd has an assert to
|
984 |
|
|
ensure it's zero (we use REL relocs, not RELA). Therefore this
|
985 |
|
|
should be assigning zero to `addend', but for clarity we use
|
986 |
|
|
`r_addend'. */
|
987 |
|
|
bfd_vma addend = rel->r_addend;
|
988 |
|
|
bfd_vma offset = rel->r_offset;
|
989 |
|
|
struct elf_link_hash_entry *h;
|
990 |
|
|
Elf_Internal_Sym *sym;
|
991 |
|
|
asection *sec;
|
992 |
|
|
const char *sym_name;
|
993 |
|
|
bfd_reloc_status_type r;
|
994 |
|
|
const char *errmsg = NULL;
|
995 |
|
|
|
996 |
|
|
h = NULL;
|
997 |
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
998 |
|
|
if (r_type < 0 || r_type >= (int) R_M32R_max)
|
999 |
|
|
{
|
1000 |
|
|
(*_bfd_error_handler) (_("%s: unknown relocation type %d"),
|
1001 |
|
|
bfd_get_filename (input_bfd),
|
1002 |
|
|
(int) r_type);
|
1003 |
|
|
bfd_set_error (bfd_error_bad_value);
|
1004 |
|
|
ret = false;
|
1005 |
|
|
continue;
|
1006 |
|
|
}
|
1007 |
|
|
|
1008 |
|
|
if (r_type == R_M32R_GNU_VTENTRY
|
1009 |
|
|
|| r_type == R_M32R_GNU_VTINHERIT)
|
1010 |
|
|
continue;
|
1011 |
|
|
|
1012 |
|
|
howto = m32r_elf_howto_table + r_type;
|
1013 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
1014 |
|
|
|
1015 |
|
|
if (info->relocateable)
|
1016 |
|
|
{
|
1017 |
|
|
/* This is a relocateable link. We don't have to change
|
1018 |
|
|
anything, unless the reloc is against a section symbol,
|
1019 |
|
|
in which case we have to adjust according to where the
|
1020 |
|
|
section symbol winds up in the output section. */
|
1021 |
|
|
sec = NULL;
|
1022 |
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
1023 |
|
|
{
|
1024 |
|
|
/* External symbol. */
|
1025 |
|
|
continue;
|
1026 |
|
|
}
|
1027 |
|
|
|
1028 |
|
|
/* Local symbol. */
|
1029 |
|
|
sym = local_syms + r_symndx;
|
1030 |
|
|
sym_name = "<local symbol>";
|
1031 |
|
|
/* STT_SECTION: symbol is associated with a section. */
|
1032 |
|
|
if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
|
1033 |
|
|
{
|
1034 |
|
|
/* Symbol isn't associated with a section. Nothing to do. */
|
1035 |
|
|
continue;
|
1036 |
|
|
}
|
1037 |
|
|
|
1038 |
|
|
sec = local_sections[r_symndx];
|
1039 |
|
|
addend += sec->output_offset + sym->st_value;
|
1040 |
|
|
#ifndef USE_REL
|
1041 |
|
|
/* This can't be done for USE_REL because it doesn't mean anything
|
1042 |
|
|
and elf_link_input_bfd asserts this stays zero. */
|
1043 |
|
|
rel->r_addend = addend;
|
1044 |
|
|
#endif
|
1045 |
|
|
|
1046 |
|
|
#ifndef USE_REL
|
1047 |
|
|
/* Addends are stored with relocs. We're done. */
|
1048 |
|
|
continue;
|
1049 |
|
|
#else /* USE_REL */
|
1050 |
|
|
/* If partial_inplace, we need to store any additional addend
|
1051 |
|
|
back in the section. */
|
1052 |
|
|
if (! howto->partial_inplace)
|
1053 |
|
|
continue;
|
1054 |
|
|
/* ??? Here is a nice place to call a special_function
|
1055 |
|
|
like handler. */
|
1056 |
|
|
if (r_type != R_M32R_HI16_SLO && r_type != R_M32R_HI16_ULO)
|
1057 |
|
|
r = _bfd_relocate_contents (howto, input_bfd,
|
1058 |
|
|
addend, contents + offset);
|
1059 |
|
|
else
|
1060 |
|
|
{
|
1061 |
|
|
Elf_Internal_Rela *lorel;
|
1062 |
|
|
|
1063 |
|
|
/* We allow an arbitrary number of HI16 relocs before the
|
1064 |
|
|
LO16 reloc. This permits gcc to emit the HI and LO relocs
|
1065 |
|
|
itself. */
|
1066 |
|
|
for (lorel = rel + 1;
|
1067 |
|
|
(lorel < relend
|
1068 |
|
|
&& (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO
|
1069 |
|
|
|| ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO));
|
1070 |
|
|
lorel++)
|
1071 |
|
|
continue;
|
1072 |
|
|
if (lorel < relend
|
1073 |
|
|
&& ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16)
|
1074 |
|
|
{
|
1075 |
|
|
m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel,
|
1076 |
|
|
contents, addend);
|
1077 |
|
|
r = bfd_reloc_ok;
|
1078 |
|
|
}
|
1079 |
|
|
else
|
1080 |
|
|
r = _bfd_relocate_contents (howto, input_bfd,
|
1081 |
|
|
addend, contents + offset);
|
1082 |
|
|
}
|
1083 |
|
|
#endif /* USE_REL */
|
1084 |
|
|
}
|
1085 |
|
|
else
|
1086 |
|
|
{
|
1087 |
|
|
bfd_vma relocation;
|
1088 |
|
|
|
1089 |
|
|
/* This is a final link. */
|
1090 |
|
|
sym = NULL;
|
1091 |
|
|
sec = NULL;
|
1092 |
|
|
|
1093 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
1094 |
|
|
{
|
1095 |
|
|
/* Local symbol. */
|
1096 |
|
|
sym = local_syms + r_symndx;
|
1097 |
|
|
sec = local_sections[r_symndx];
|
1098 |
|
|
sym_name = "<local symbol>";
|
1099 |
|
|
relocation = (sec->output_section->vma
|
1100 |
|
|
+ sec->output_offset
|
1101 |
|
|
+ sym->st_value);
|
1102 |
|
|
}
|
1103 |
|
|
else
|
1104 |
|
|
{
|
1105 |
|
|
/* External symbol. */
|
1106 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
1107 |
|
|
while (h->root.type == bfd_link_hash_indirect
|
1108 |
|
|
|| h->root.type == bfd_link_hash_warning)
|
1109 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
1110 |
|
|
sym_name = h->root.root.string;
|
1111 |
|
|
|
1112 |
|
|
if (h->root.type == bfd_link_hash_defined
|
1113 |
|
|
|| h->root.type == bfd_link_hash_defweak)
|
1114 |
|
|
{
|
1115 |
|
|
sec = h->root.u.def.section;
|
1116 |
|
|
if (sec->output_section == NULL)
|
1117 |
|
|
relocation = 0;
|
1118 |
|
|
else
|
1119 |
|
|
relocation = (h->root.u.def.value
|
1120 |
|
|
+ sec->output_section->vma
|
1121 |
|
|
+ sec->output_offset);
|
1122 |
|
|
}
|
1123 |
|
|
else if (h->root.type == bfd_link_hash_undefweak)
|
1124 |
|
|
relocation = 0;
|
1125 |
|
|
else
|
1126 |
|
|
{
|
1127 |
|
|
if (! ((*info->callbacks->undefined_symbol)
|
1128 |
|
|
(info, h->root.root.string, input_bfd,
|
1129 |
|
|
input_section, offset, true)))
|
1130 |
|
|
return false;
|
1131 |
|
|
relocation = 0;
|
1132 |
|
|
}
|
1133 |
|
|
}
|
1134 |
|
|
|
1135 |
|
|
/* Sanity check the address. */
|
1136 |
|
|
if (offset > input_section->_raw_size)
|
1137 |
|
|
{
|
1138 |
|
|
r = bfd_reloc_outofrange;
|
1139 |
|
|
goto check_reloc;
|
1140 |
|
|
}
|
1141 |
|
|
|
1142 |
|
|
switch ((int) r_type)
|
1143 |
|
|
{
|
1144 |
|
|
case (int) R_M32R_10_PCREL :
|
1145 |
|
|
r = m32r_elf_do_10_pcrel_reloc (input_bfd, howto, input_section,
|
1146 |
|
|
contents, offset,
|
1147 |
|
|
sec, relocation, addend);
|
1148 |
|
|
break;
|
1149 |
|
|
|
1150 |
|
|
case (int) R_M32R_HI16_SLO :
|
1151 |
|
|
case (int) R_M32R_HI16_ULO :
|
1152 |
|
|
{
|
1153 |
|
|
Elf_Internal_Rela *lorel;
|
1154 |
|
|
|
1155 |
|
|
/* We allow an arbitrary number of HI16 relocs before the
|
1156 |
|
|
LO16 reloc. This permits gcc to emit the HI and LO relocs
|
1157 |
|
|
itself. */
|
1158 |
|
|
for (lorel = rel + 1;
|
1159 |
|
|
(lorel < relend
|
1160 |
|
|
&& (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO
|
1161 |
|
|
|| ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO));
|
1162 |
|
|
lorel++)
|
1163 |
|
|
continue;
|
1164 |
|
|
if (lorel < relend
|
1165 |
|
|
&& ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16)
|
1166 |
|
|
{
|
1167 |
|
|
m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel,
|
1168 |
|
|
contents, relocation + addend);
|
1169 |
|
|
r = bfd_reloc_ok;
|
1170 |
|
|
}
|
1171 |
|
|
else
|
1172 |
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
1173 |
|
|
contents, offset,
|
1174 |
|
|
relocation, addend);
|
1175 |
|
|
}
|
1176 |
|
|
break;
|
1177 |
|
|
|
1178 |
|
|
case (int) R_M32R_SDA16 :
|
1179 |
|
|
{
|
1180 |
|
|
const char *name;
|
1181 |
|
|
|
1182 |
|
|
BFD_ASSERT (sec != NULL);
|
1183 |
|
|
name = bfd_get_section_name (abfd, sec);
|
1184 |
|
|
|
1185 |
|
|
if (strcmp (name, ".sdata") == 0
|
1186 |
|
|
|| strcmp (name, ".sbss") == 0
|
1187 |
|
|
|| strcmp (name, ".scommon") == 0)
|
1188 |
|
|
{
|
1189 |
|
|
bfd_vma sda_base;
|
1190 |
|
|
bfd *out_bfd = sec->output_section->owner;
|
1191 |
|
|
|
1192 |
|
|
r = m32r_elf_final_sda_base (out_bfd, info,
|
1193 |
|
|
&errmsg,
|
1194 |
|
|
&sda_base);
|
1195 |
|
|
if (r != bfd_reloc_ok)
|
1196 |
|
|
{
|
1197 |
|
|
ret = false;
|
1198 |
|
|
goto check_reloc;
|
1199 |
|
|
}
|
1200 |
|
|
|
1201 |
|
|
/* At this point `relocation' contains the object's
|
1202 |
|
|
address. */
|
1203 |
|
|
relocation -= sda_base;
|
1204 |
|
|
/* Now it contains the offset from _SDA_BASE_. */
|
1205 |
|
|
}
|
1206 |
|
|
else
|
1207 |
|
|
{
|
1208 |
|
|
(*_bfd_error_handler) (_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"),
|
1209 |
|
|
bfd_get_filename (input_bfd),
|
1210 |
|
|
sym_name,
|
1211 |
|
|
m32r_elf_howto_table[(int) r_type].name,
|
1212 |
|
|
bfd_get_section_name (abfd, sec));
|
1213 |
|
|
/*bfd_set_error (bfd_error_bad_value); ??? why? */
|
1214 |
|
|
ret = false;
|
1215 |
|
|
continue;
|
1216 |
|
|
}
|
1217 |
|
|
}
|
1218 |
|
|
/* fall through */
|
1219 |
|
|
|
1220 |
|
|
default :
|
1221 |
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
1222 |
|
|
contents, offset,
|
1223 |
|
|
relocation, addend);
|
1224 |
|
|
break;
|
1225 |
|
|
}
|
1226 |
|
|
}
|
1227 |
|
|
|
1228 |
|
|
check_reloc:
|
1229 |
|
|
|
1230 |
|
|
if (r != bfd_reloc_ok)
|
1231 |
|
|
{
|
1232 |
|
|
/* FIXME: This should be generic enough to go in a utility. */
|
1233 |
|
|
const char *name;
|
1234 |
|
|
|
1235 |
|
|
if (h != NULL)
|
1236 |
|
|
name = h->root.root.string;
|
1237 |
|
|
else
|
1238 |
|
|
{
|
1239 |
|
|
name = (bfd_elf_string_from_elf_section
|
1240 |
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
1241 |
|
|
if (name == NULL || *name == '\0')
|
1242 |
|
|
name = bfd_section_name (input_bfd, sec);
|
1243 |
|
|
}
|
1244 |
|
|
|
1245 |
|
|
if (errmsg != NULL)
|
1246 |
|
|
goto common_error;
|
1247 |
|
|
|
1248 |
|
|
switch (r)
|
1249 |
|
|
{
|
1250 |
|
|
case bfd_reloc_overflow:
|
1251 |
|
|
if (! ((*info->callbacks->reloc_overflow)
|
1252 |
|
|
(info, name, howto->name, (bfd_vma) 0,
|
1253 |
|
|
input_bfd, input_section, offset)))
|
1254 |
|
|
return false;
|
1255 |
|
|
break;
|
1256 |
|
|
|
1257 |
|
|
case bfd_reloc_undefined:
|
1258 |
|
|
if (! ((*info->callbacks->undefined_symbol)
|
1259 |
|
|
(info, name, input_bfd, input_section,
|
1260 |
|
|
offset, true)))
|
1261 |
|
|
return false;
|
1262 |
|
|
break;
|
1263 |
|
|
|
1264 |
|
|
case bfd_reloc_outofrange:
|
1265 |
|
|
errmsg = _("internal error: out of range error");
|
1266 |
|
|
goto common_error;
|
1267 |
|
|
|
1268 |
|
|
case bfd_reloc_notsupported:
|
1269 |
|
|
errmsg = _("internal error: unsupported relocation error");
|
1270 |
|
|
goto common_error;
|
1271 |
|
|
|
1272 |
|
|
case bfd_reloc_dangerous:
|
1273 |
|
|
errmsg = _("internal error: dangerous error");
|
1274 |
|
|
goto common_error;
|
1275 |
|
|
|
1276 |
|
|
default:
|
1277 |
|
|
errmsg = _("internal error: unknown error");
|
1278 |
|
|
/* fall through */
|
1279 |
|
|
|
1280 |
|
|
common_error:
|
1281 |
|
|
if (!((*info->callbacks->warning)
|
1282 |
|
|
(info, errmsg, name, input_bfd, input_section,
|
1283 |
|
|
offset)))
|
1284 |
|
|
return false;
|
1285 |
|
|
break;
|
1286 |
|
|
}
|
1287 |
|
|
}
|
1288 |
|
|
}
|
1289 |
|
|
|
1290 |
|
|
return ret;
|
1291 |
|
|
}
|
1292 |
|
|
|
1293 |
|
|
#if 0 /* relaxing not supported yet */
|
1294 |
|
|
|
1295 |
|
|
/* This function handles relaxing for the m32r.
|
1296 |
|
|
Relaxing on the m32r is tricky because of instruction alignment
|
1297 |
|
|
requirements (4 byte instructions must be aligned on 4 byte boundaries).
|
1298 |
|
|
|
1299 |
|
|
The following relaxing opportunities are handled:
|
1300 |
|
|
|
1301 |
|
|
seth/add3/jl -> bl24 or bl8
|
1302 |
|
|
seth/add3 -> ld24
|
1303 |
|
|
|
1304 |
|
|
It would be nice to handle bl24 -> bl8 but given:
|
1305 |
|
|
|
1306 |
|
|
- 4 byte insns must be on 4 byte boundaries
|
1307 |
|
|
- branch instructions only branch to insns on 4 byte boundaries
|
1308 |
|
|
|
1309 |
|
|
this isn't much of a win because the insn in the 2 "deleted" bytes
|
1310 |
|
|
must become a nop. With some complexity some real relaxation could be
|
1311 |
|
|
done but the frequency just wouldn't make it worth it; it's better to
|
1312 |
|
|
try to do all the code compaction one can elsewhere.
|
1313 |
|
|
When the chip supports parallel 16 bit insns, things may change.
|
1314 |
|
|
*/
|
1315 |
|
|
|
1316 |
|
|
static boolean
|
1317 |
|
|
m32r_elf_relax_section (abfd, sec, link_info, again)
|
1318 |
|
|
bfd *abfd;
|
1319 |
|
|
asection *sec;
|
1320 |
|
|
struct bfd_link_info *link_info;
|
1321 |
|
|
boolean *again;
|
1322 |
|
|
{
|
1323 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
1324 |
|
|
/* The Rela structures are used here because that's what
|
1325 |
|
|
_bfd_elf32_link_read_relocs uses [for convenience - it sets the addend
|
1326 |
|
|
field to 0]. */
|
1327 |
|
|
Elf_Internal_Rela *internal_relocs;
|
1328 |
|
|
Elf_Internal_Rela *free_relocs = NULL;
|
1329 |
|
|
Elf_Internal_Rela *irel, *irelend;
|
1330 |
|
|
bfd_byte *contents = NULL;
|
1331 |
|
|
bfd_byte *free_contents = NULL;
|
1332 |
|
|
Elf32_External_Sym *extsyms = NULL;
|
1333 |
|
|
Elf32_External_Sym *free_extsyms = NULL;
|
1334 |
|
|
|
1335 |
|
|
/* Assume nothing changes. */
|
1336 |
|
|
*again = false;
|
1337 |
|
|
|
1338 |
|
|
/* We don't have to do anything for a relocateable link, if
|
1339 |
|
|
this section does not have relocs, or if this is not a
|
1340 |
|
|
code section. */
|
1341 |
|
|
if (link_info->relocateable
|
1342 |
|
|
|| (sec->flags & SEC_RELOC) == 0
|
1343 |
|
|
|| sec->reloc_count == 0
|
1344 |
|
|
|| (sec->flags & SEC_CODE) == 0
|
1345 |
|
|
|| 0 /* FIXME: check SHF_M32R_CAN_RELAX */)
|
1346 |
|
|
return true;
|
1347 |
|
|
|
1348 |
|
|
/* If this is the first time we have been called for this section,
|
1349 |
|
|
initialize the cooked size. */
|
1350 |
|
|
if (sec->_cooked_size == 0)
|
1351 |
|
|
sec->_cooked_size = sec->_raw_size;
|
1352 |
|
|
|
1353 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
1354 |
|
|
|
1355 |
|
|
/* Get a copy of the native relocations. */
|
1356 |
|
|
internal_relocs = (_bfd_elf32_link_read_relocs
|
1357 |
|
|
(abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
|
1358 |
|
|
link_info->keep_memory));
|
1359 |
|
|
if (internal_relocs == NULL)
|
1360 |
|
|
goto error_return;
|
1361 |
|
|
if (! link_info->keep_memory)
|
1362 |
|
|
free_relocs = internal_relocs;
|
1363 |
|
|
|
1364 |
|
|
/* Walk through them looking for relaxing opportunities. */
|
1365 |
|
|
irelend = internal_relocs + sec->reloc_count;
|
1366 |
|
|
for (irel = internal_relocs; irel < irelend; irel++)
|
1367 |
|
|
{
|
1368 |
|
|
bfd_vma symval;
|
1369 |
|
|
|
1370 |
|
|
/* If this isn't something that can be relaxed, then ignore
|
1371 |
|
|
this reloc. */
|
1372 |
|
|
if (ELF32_R_TYPE (irel->r_info) != (int) R_M32R_HI16_SLO)
|
1373 |
|
|
continue;
|
1374 |
|
|
|
1375 |
|
|
/* Get the section contents if we haven't done so already. */
|
1376 |
|
|
if (contents == NULL)
|
1377 |
|
|
{
|
1378 |
|
|
/* Get cached copy if it exists. */
|
1379 |
|
|
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
1380 |
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
1381 |
|
|
else
|
1382 |
|
|
{
|
1383 |
|
|
/* Go get them off disk. */
|
1384 |
|
|
contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
|
1385 |
|
|
if (contents == NULL)
|
1386 |
|
|
goto error_return;
|
1387 |
|
|
free_contents = contents;
|
1388 |
|
|
|
1389 |
|
|
if (! bfd_get_section_contents (abfd, sec, contents,
|
1390 |
|
|
(file_ptr) 0, sec->_raw_size))
|
1391 |
|
|
goto error_return;
|
1392 |
|
|
}
|
1393 |
|
|
}
|
1394 |
|
|
|
1395 |
|
|
/* Read this BFD's symbols if we haven't done so already. */
|
1396 |
|
|
if (extsyms == NULL)
|
1397 |
|
|
{
|
1398 |
|
|
/* Get cached copy if it exists. */
|
1399 |
|
|
if (symtab_hdr->contents != NULL)
|
1400 |
|
|
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
|
1401 |
|
|
else
|
1402 |
|
|
{
|
1403 |
|
|
/* Go get them off disk. */
|
1404 |
|
|
extsyms = ((Elf32_External_Sym *)
|
1405 |
|
|
bfd_malloc (symtab_hdr->sh_size));
|
1406 |
|
|
if (extsyms == NULL)
|
1407 |
|
|
goto error_return;
|
1408 |
|
|
free_extsyms = extsyms;
|
1409 |
|
|
if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|
1410 |
|
|
|| (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd)
|
1411 |
|
|
!= symtab_hdr->sh_size))
|
1412 |
|
|
goto error_return;
|
1413 |
|
|
}
|
1414 |
|
|
}
|
1415 |
|
|
|
1416 |
|
|
/* Get the value of the symbol referred to by the reloc. */
|
1417 |
|
|
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
1418 |
|
|
{
|
1419 |
|
|
Elf_Internal_Sym isym;
|
1420 |
|
|
asection *sym_sec;
|
1421 |
|
|
|
1422 |
|
|
/* A local symbol. */
|
1423 |
|
|
bfd_elf32_swap_symbol_in (abfd,
|
1424 |
|
|
extsyms + ELF32_R_SYM (irel->r_info),
|
1425 |
|
|
&isym);
|
1426 |
|
|
|
1427 |
|
|
sym_sec = bfd_section_from_elf_index (abfd, isym.st_shndx);
|
1428 |
|
|
symval = (isym.st_value
|
1429 |
|
|
+ sym_sec->output_section->vma
|
1430 |
|
|
+ sym_sec->output_offset);
|
1431 |
|
|
}
|
1432 |
|
|
else
|
1433 |
|
|
{
|
1434 |
|
|
unsigned long indx;
|
1435 |
|
|
struct elf_link_hash_entry *h;
|
1436 |
|
|
|
1437 |
|
|
/* An external symbol. */
|
1438 |
|
|
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
1439 |
|
|
h = elf_sym_hashes (abfd)[indx];
|
1440 |
|
|
BFD_ASSERT (h != NULL);
|
1441 |
|
|
if (h->root.type != bfd_link_hash_defined
|
1442 |
|
|
&& h->root.type != bfd_link_hash_defweak)
|
1443 |
|
|
{
|
1444 |
|
|
/* This appears to be a reference to an undefined
|
1445 |
|
|
symbol. Just ignore it--it will be caught by the
|
1446 |
|
|
regular reloc processing. */
|
1447 |
|
|
continue;
|
1448 |
|
|
}
|
1449 |
|
|
|
1450 |
|
|
symval = (h->root.u.def.value
|
1451 |
|
|
+ h->root.u.def.section->output_section->vma
|
1452 |
|
|
+ h->root.u.def.section->output_offset);
|
1453 |
|
|
}
|
1454 |
|
|
|
1455 |
|
|
/* For simplicity of coding, we are going to modify the section
|
1456 |
|
|
contents, the section relocs, and the BFD symbol table. We
|
1457 |
|
|
must tell the rest of the code not to free up this
|
1458 |
|
|
information. It would be possible to instead create a table
|
1459 |
|
|
of changes which have to be made, as is done in coff-mips.c;
|
1460 |
|
|
that would be more work, but would require less memory when
|
1461 |
|
|
the linker is run. */
|
1462 |
|
|
|
1463 |
|
|
/* Try to change a seth/add3/jl subroutine call to bl24 or bl8.
|
1464 |
|
|
This sequence is generated by the compiler when compiling in
|
1465 |
|
|
32 bit mode. Also look for seth/add3 -> ld24. */
|
1466 |
|
|
|
1467 |
|
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_M32R_HI16_SLO)
|
1468 |
|
|
{
|
1469 |
|
|
Elf_Internal_Rela *nrel;
|
1470 |
|
|
bfd_vma pc = (sec->output_section->vma + sec->output_offset
|
1471 |
|
|
+ irel->r_offset);
|
1472 |
|
|
bfd_signed_vma pcrel_value = symval - pc;
|
1473 |
|
|
unsigned int code,reg;
|
1474 |
|
|
int addend,nop_p,bl8_p,to_delete;
|
1475 |
|
|
|
1476 |
|
|
/* The tests are ordered so that we get out as quickly as possible
|
1477 |
|
|
if this isn't something we can relax, taking into account that
|
1478 |
|
|
we are looking for two separate possibilities (jl/ld24). */
|
1479 |
|
|
|
1480 |
|
|
/* Do nothing if no room in the section for this to be what we're
|
1481 |
|
|
looking for. */
|
1482 |
|
|
if (irel->r_offset > sec->_cooked_size - 8)
|
1483 |
|
|
continue;
|
1484 |
|
|
|
1485 |
|
|
/* Make sure the next relocation applies to the next
|
1486 |
|
|
instruction and that it's the add3's reloc. */
|
1487 |
|
|
nrel = irel + 1;
|
1488 |
|
|
if (nrel == irelend
|
1489 |
|
|
|| irel->r_offset + 4 != nrel->r_offset
|
1490 |
|
|
|| ELF32_R_TYPE (nrel->r_info) != (int) R_M32R_LO16)
|
1491 |
|
|
continue;
|
1492 |
|
|
|
1493 |
|
|
/* See if the instructions are seth/add3. */
|
1494 |
|
|
/* FIXME: This is where macros from cgen can come in. */
|
1495 |
|
|
code = bfd_get_16 (abfd, contents + irel->r_offset + 0);
|
1496 |
|
|
if ((code & 0xf0ff) != 0xd0c0)
|
1497 |
|
|
continue; /* not seth rN,foo */
|
1498 |
|
|
reg = (code & 0x0f00) >> 8;
|
1499 |
|
|
code = bfd_get_16 (abfd, contents + irel->r_offset + 4);
|
1500 |
|
|
if (code != (0x80a0 | reg | (reg << 8)))
|
1501 |
|
|
continue; /* not add3 rN,rN,foo */
|
1502 |
|
|
|
1503 |
|
|
/* At this point we've confirmed we have seth/add3. Now check
|
1504 |
|
|
whether the next insn is a jl, in which case try to change this
|
1505 |
|
|
to bl24 or bl8. */
|
1506 |
|
|
|
1507 |
|
|
/* Ensure the branch target is in range.
|
1508 |
|
|
The bl24 instruction has a 24 bit operand which is the target
|
1509 |
|
|
address right shifted by 2, giving a signed range of 26 bits.
|
1510 |
|
|
Note that 4 bytes are added to the high value because the target
|
1511 |
|
|
will be at least 4 bytes closer if we can relax. It'll actually
|
1512 |
|
|
be 4 or 8 bytes closer, but we don't know which just yet and
|
1513 |
|
|
the difference isn't significant enough to worry about. */
|
1514 |
|
|
#ifndef USE_REL /* put in for learning purposes */
|
1515 |
|
|
pcrel_value += irel->r_addend;
|
1516 |
|
|
#else
|
1517 |
|
|
addend = bfd_get_signed_16 (abfd, contents + irel->r_offset + 2);
|
1518 |
|
|
pcrel_value += addend;
|
1519 |
|
|
#endif
|
1520 |
|
|
|
1521 |
|
|
if (pcrel_value >= -(1 << 25) && pcrel_value < (1 << 25) + 4
|
1522 |
|
|
/* Do nothing if no room in the section for this to be what we're
|
1523 |
|
|
looking for. */
|
1524 |
|
|
&& (irel->r_offset <= sec->_cooked_size - 12)
|
1525 |
|
|
/* Ensure the next insn is "jl rN". */
|
1526 |
|
|
&& ((code = bfd_get_16 (abfd, contents + irel->r_offset + 8)),
|
1527 |
|
|
code != (0x1ec0 | reg)))
|
1528 |
|
|
{
|
1529 |
|
|
/* We can relax to bl24/bl8. */
|
1530 |
|
|
|
1531 |
|
|
/* See if there's a nop following the jl.
|
1532 |
|
|
Also see if we can use a bl8 insn. */
|
1533 |
|
|
code = bfd_get_16 (abfd, contents + irel->r_offset + 10);
|
1534 |
|
|
nop_p = (code & 0x7fff) == NOP_INSN;
|
1535 |
|
|
bl8_p = pcrel_value >= -0x200 && pcrel_value < 0x200;
|
1536 |
|
|
|
1537 |
|
|
if (bl8_p)
|
1538 |
|
|
{
|
1539 |
|
|
/* Change "seth rN,foo" to "bl8 foo || nop".
|
1540 |
|
|
We OR in CODE just in case it's not a nop (technically,
|
1541 |
|
|
CODE currently must be a nop, but for cleanness we
|
1542 |
|
|
allow it to be anything). */
|
1543 |
|
|
#ifndef USE_REL /* put in for learning purposes */
|
1544 |
|
|
code = 0x7e000000 | MAKE_PARALLEL (code);
|
1545 |
|
|
#else
|
1546 |
|
|
code = (0x7e000000 + (((addend >> 2) & 0xff) << 16)) | MAKE_PARALLEL (code);
|
1547 |
|
|
#endif
|
1548 |
|
|
to_delete = 8;
|
1549 |
|
|
}
|
1550 |
|
|
else
|
1551 |
|
|
{
|
1552 |
|
|
/* Change the seth rN,foo to a bl24 foo. */
|
1553 |
|
|
#ifndef USE_REL /* put in for learning purposes */
|
1554 |
|
|
code = 0xfe000000;
|
1555 |
|
|
#else
|
1556 |
|
|
code = 0xfe000000 + ((addend >> 2) & 0xffffff);
|
1557 |
|
|
#endif
|
1558 |
|
|
to_delete = nop_p ? 8 : 4;
|
1559 |
|
|
}
|
1560 |
|
|
|
1561 |
|
|
bfd_put_32 (abfd, code, contents + irel->r_offset);
|
1562 |
|
|
|
1563 |
|
|
/* Set the new reloc type. */
|
1564 |
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
|
1565 |
|
|
bl8_p ? R_M32R_10_PCREL : R_M32R_26_PCREL);
|
1566 |
|
|
|
1567 |
|
|
/* Delete the add3 reloc by making it a null reloc. */
|
1568 |
|
|
nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
|
1569 |
|
|
R_M32R_NONE);
|
1570 |
|
|
}
|
1571 |
|
|
else if (addend >= 0
|
1572 |
|
|
&& symval + addend <= 0xffffff)
|
1573 |
|
|
{
|
1574 |
|
|
/* We can relax to ld24. */
|
1575 |
|
|
|
1576 |
|
|
code = 0xe0000000 | (reg << 24) | (addend & 0xffffff);
|
1577 |
|
|
bfd_put_32 (abfd, code, contents + irel->r_offset);
|
1578 |
|
|
to_delete = 4;
|
1579 |
|
|
/* Tell the following code a nop filler isn't needed. */
|
1580 |
|
|
nop_p = 1;
|
1581 |
|
|
}
|
1582 |
|
|
else
|
1583 |
|
|
{
|
1584 |
|
|
/* Can't do anything here. */
|
1585 |
|
|
continue;
|
1586 |
|
|
}
|
1587 |
|
|
|
1588 |
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
1589 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
1590 |
|
|
free_relocs = NULL;
|
1591 |
|
|
|
1592 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
1593 |
|
|
free_contents = NULL;
|
1594 |
|
|
|
1595 |
|
|
symtab_hdr->contents = (bfd_byte *) extsyms;
|
1596 |
|
|
free_extsyms = NULL;
|
1597 |
|
|
|
1598 |
|
|
/* Delete TO_DELETE bytes of data. */
|
1599 |
|
|
if (!m32r_elf_relax_delete_bytes (abfd, sec,
|
1600 |
|
|
irel->r_offset + 4, to_delete))
|
1601 |
|
|
goto error_return;
|
1602 |
|
|
|
1603 |
|
|
/* Now that the following bytes have been moved into place, see if
|
1604 |
|
|
we need to replace the jl with a nop. This happens when we had
|
1605 |
|
|
to use a bl24 insn and the insn following the jl isn't a nop.
|
1606 |
|
|
Technically, this situation can't happen (since the insn can
|
1607 |
|
|
never be executed) but to be clean we do this. When the chip
|
1608 |
|
|
supports parallel 16 bit insns things may change.
|
1609 |
|
|
We don't need to do this in the case of relaxing to ld24,
|
1610 |
|
|
and the above code sets nop_p so this isn't done. */
|
1611 |
|
|
if (! nop_p && to_delete == 4)
|
1612 |
|
|
bfd_put_16 (abfd, NOP_INSN, contents + irel->r_offset + 4);
|
1613 |
|
|
|
1614 |
|
|
/* That will change things, so we should relax again.
|
1615 |
|
|
Note that this is not required, and it may be slow. */
|
1616 |
|
|
*again = true;
|
1617 |
|
|
|
1618 |
|
|
continue;
|
1619 |
|
|
}
|
1620 |
|
|
|
1621 |
|
|
/* loop to try the next reloc */
|
1622 |
|
|
}
|
1623 |
|
|
|
1624 |
|
|
if (free_relocs != NULL)
|
1625 |
|
|
{
|
1626 |
|
|
free (free_relocs);
|
1627 |
|
|
free_relocs = NULL;
|
1628 |
|
|
}
|
1629 |
|
|
|
1630 |
|
|
if (free_contents != NULL)
|
1631 |
|
|
{
|
1632 |
|
|
if (! link_info->keep_memory)
|
1633 |
|
|
free (free_contents);
|
1634 |
|
|
else
|
1635 |
|
|
{
|
1636 |
|
|
/* Cache the section contents for elf_link_input_bfd. */
|
1637 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
1638 |
|
|
}
|
1639 |
|
|
free_contents = NULL;
|
1640 |
|
|
}
|
1641 |
|
|
|
1642 |
|
|
if (free_extsyms != NULL)
|
1643 |
|
|
{
|
1644 |
|
|
if (! link_info->keep_memory)
|
1645 |
|
|
free (free_extsyms);
|
1646 |
|
|
else
|
1647 |
|
|
{
|
1648 |
|
|
/* Cache the symbols for elf_link_input_bfd. */
|
1649 |
|
|
symtab_hdr->contents = extsyms;
|
1650 |
|
|
}
|
1651 |
|
|
free_extsyms = NULL;
|
1652 |
|
|
}
|
1653 |
|
|
|
1654 |
|
|
return true;
|
1655 |
|
|
|
1656 |
|
|
error_return:
|
1657 |
|
|
if (free_relocs != NULL)
|
1658 |
|
|
free (free_relocs);
|
1659 |
|
|
if (free_contents != NULL)
|
1660 |
|
|
free (free_contents);
|
1661 |
|
|
if (free_extsyms != NULL)
|
1662 |
|
|
free (free_extsyms);
|
1663 |
|
|
return false;
|
1664 |
|
|
}
|
1665 |
|
|
|
1666 |
|
|
/* Delete some bytes from a section while relaxing. */
|
1667 |
|
|
|
1668 |
|
|
static boolean
|
1669 |
|
|
m32r_elf_relax_delete_bytes (abfd, sec, addr, count)
|
1670 |
|
|
bfd *abfd;
|
1671 |
|
|
asection *sec;
|
1672 |
|
|
bfd_vma addr;
|
1673 |
|
|
int count;
|
1674 |
|
|
{
|
1675 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
1676 |
|
|
Elf32_External_Sym *extsyms;
|
1677 |
|
|
int shndx, index;
|
1678 |
|
|
bfd_byte *contents;
|
1679 |
|
|
Elf_Internal_Rela *irel, *irelend;
|
1680 |
|
|
Elf_Internal_Rela *irelalign;
|
1681 |
|
|
bfd_vma toaddr;
|
1682 |
|
|
Elf32_External_Sym *esym, *esymend;
|
1683 |
|
|
struct elf_link_hash_entry *sym_hash;
|
1684 |
|
|
|
1685 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
1686 |
|
|
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
|
1687 |
|
|
|
1688 |
|
|
shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
1689 |
|
|
|
1690 |
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
1691 |
|
|
|
1692 |
|
|
/* The deletion must stop at the next ALIGN reloc for an aligment
|
1693 |
|
|
power larger than the number of bytes we are deleting. */
|
1694 |
|
|
|
1695 |
|
|
irelalign = NULL;
|
1696 |
|
|
toaddr = sec->_cooked_size;
|
1697 |
|
|
|
1698 |
|
|
irel = elf_section_data (sec)->relocs;
|
1699 |
|
|
irelend = irel + sec->reloc_count;
|
1700 |
|
|
|
1701 |
|
|
/* Actually delete the bytes. */
|
1702 |
|
|
memmove (contents + addr, contents + addr + count, toaddr - addr - count);
|
1703 |
|
|
sec->_cooked_size -= count;
|
1704 |
|
|
|
1705 |
|
|
/* Adjust all the relocs. */
|
1706 |
|
|
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
1707 |
|
|
{
|
1708 |
|
|
/* Get the new reloc address. */
|
1709 |
|
|
if ((irel->r_offset > addr
|
1710 |
|
|
&& irel->r_offset < toaddr))
|
1711 |
|
|
irel->r_offset -= count;
|
1712 |
|
|
}
|
1713 |
|
|
|
1714 |
|
|
/* Adjust the local symbols defined in this section. */
|
1715 |
|
|
esym = extsyms;
|
1716 |
|
|
esymend = esym + symtab_hdr->sh_info;
|
1717 |
|
|
for (; esym < esymend; esym++)
|
1718 |
|
|
{
|
1719 |
|
|
Elf_Internal_Sym isym;
|
1720 |
|
|
|
1721 |
|
|
bfd_elf32_swap_symbol_in (abfd, esym, &isym);
|
1722 |
|
|
|
1723 |
|
|
if (isym.st_shndx == shndx
|
1724 |
|
|
&& isym.st_value > addr
|
1725 |
|
|
&& isym.st_value < toaddr)
|
1726 |
|
|
{
|
1727 |
|
|
isym.st_value -= count;
|
1728 |
|
|
bfd_elf32_swap_symbol_out (abfd, &isym, esym);
|
1729 |
|
|
}
|
1730 |
|
|
}
|
1731 |
|
|
|
1732 |
|
|
/* Now adjust the global symbols defined in this section. */
|
1733 |
|
|
esym = extsyms + symtab_hdr->sh_info;
|
1734 |
|
|
esymend = extsyms + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym));
|
1735 |
|
|
for (index = 0; esym < esymend; esym++, index++)
|
1736 |
|
|
{
|
1737 |
|
|
Elf_Internal_Sym isym;
|
1738 |
|
|
|
1739 |
|
|
bfd_elf32_swap_symbol_in (abfd, esym, &isym);
|
1740 |
|
|
sym_hash = elf_sym_hashes (abfd)[index];
|
1741 |
|
|
if (isym.st_shndx == shndx
|
1742 |
|
|
&& ((sym_hash)->root.type == bfd_link_hash_defined
|
1743 |
|
|
|| (sym_hash)->root.type == bfd_link_hash_defweak)
|
1744 |
|
|
&& (sym_hash)->root.u.def.section == sec
|
1745 |
|
|
&& (sym_hash)->root.u.def.value > addr
|
1746 |
|
|
&& (sym_hash)->root.u.def.value < toaddr)
|
1747 |
|
|
{
|
1748 |
|
|
(sym_hash)->root.u.def.value -= count;
|
1749 |
|
|
}
|
1750 |
|
|
}
|
1751 |
|
|
|
1752 |
|
|
return true;
|
1753 |
|
|
}
|
1754 |
|
|
|
1755 |
|
|
/* This is a version of bfd_generic_get_relocated_section_contents
|
1756 |
|
|
which uses m32r_elf_relocate_section. */
|
1757 |
|
|
|
1758 |
|
|
static bfd_byte *
|
1759 |
|
|
m32r_elf_get_relocated_section_contents (output_bfd, link_info, link_order,
|
1760 |
|
|
data, relocateable, symbols)
|
1761 |
|
|
bfd *output_bfd;
|
1762 |
|
|
struct bfd_link_info *link_info;
|
1763 |
|
|
struct bfd_link_order *link_order;
|
1764 |
|
|
bfd_byte *data;
|
1765 |
|
|
boolean relocateable;
|
1766 |
|
|
asymbol **symbols;
|
1767 |
|
|
{
|
1768 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
1769 |
|
|
asection *input_section = link_order->u.indirect.section;
|
1770 |
|
|
bfd *input_bfd = input_section->owner;
|
1771 |
|
|
asection **sections = NULL;
|
1772 |
|
|
Elf_Internal_Rela *internal_relocs = NULL;
|
1773 |
|
|
Elf32_External_Sym *external_syms = NULL;
|
1774 |
|
|
Elf_Internal_Sym *internal_syms = NULL;
|
1775 |
|
|
|
1776 |
|
|
/* We only need to handle the case of relaxing, or of having a
|
1777 |
|
|
particular set of section contents, specially. */
|
1778 |
|
|
if (relocateable
|
1779 |
|
|
|| elf_section_data (input_section)->this_hdr.contents == NULL)
|
1780 |
|
|
return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
|
1781 |
|
|
link_order, data,
|
1782 |
|
|
relocateable,
|
1783 |
|
|
symbols);
|
1784 |
|
|
|
1785 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
1786 |
|
|
|
1787 |
|
|
memcpy (data, elf_section_data (input_section)->this_hdr.contents,
|
1788 |
|
|
input_section->_raw_size);
|
1789 |
|
|
|
1790 |
|
|
if ((input_section->flags & SEC_RELOC) != 0
|
1791 |
|
|
&& input_section->reloc_count > 0)
|
1792 |
|
|
{
|
1793 |
|
|
Elf_Internal_Sym *isymp;
|
1794 |
|
|
asection **secpp;
|
1795 |
|
|
Elf32_External_Sym *esym, *esymend;
|
1796 |
|
|
|
1797 |
|
|
if (symtab_hdr->contents != NULL)
|
1798 |
|
|
external_syms = (Elf32_External_Sym *) symtab_hdr->contents;
|
1799 |
|
|
else
|
1800 |
|
|
{
|
1801 |
|
|
external_syms = ((Elf32_External_Sym *)
|
1802 |
|
|
bfd_malloc (symtab_hdr->sh_info
|
1803 |
|
|
* sizeof (Elf32_External_Sym)));
|
1804 |
|
|
if (external_syms == NULL && symtab_hdr->sh_info > 0)
|
1805 |
|
|
goto error_return;
|
1806 |
|
|
if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|
1807 |
|
|
|| (bfd_read (external_syms, sizeof (Elf32_External_Sym),
|
1808 |
|
|
symtab_hdr->sh_info, input_bfd)
|
1809 |
|
|
!= (symtab_hdr->sh_info * sizeof (Elf32_External_Sym))))
|
1810 |
|
|
goto error_return;
|
1811 |
|
|
}
|
1812 |
|
|
|
1813 |
|
|
internal_relocs = (_bfd_elf32_link_read_relocs
|
1814 |
|
|
(input_bfd, input_section, (PTR) NULL,
|
1815 |
|
|
(Elf_Internal_Rela *) NULL, false));
|
1816 |
|
|
if (internal_relocs == NULL)
|
1817 |
|
|
goto error_return;
|
1818 |
|
|
|
1819 |
|
|
internal_syms = ((Elf_Internal_Sym *)
|
1820 |
|
|
bfd_malloc (symtab_hdr->sh_info
|
1821 |
|
|
* sizeof (Elf_Internal_Sym)));
|
1822 |
|
|
if (internal_syms == NULL && symtab_hdr->sh_info > 0)
|
1823 |
|
|
goto error_return;
|
1824 |
|
|
|
1825 |
|
|
sections = (asection **) bfd_malloc (symtab_hdr->sh_info
|
1826 |
|
|
* sizeof (asection *));
|
1827 |
|
|
if (sections == NULL && symtab_hdr->sh_info > 0)
|
1828 |
|
|
goto error_return;
|
1829 |
|
|
|
1830 |
|
|
isymp = internal_syms;
|
1831 |
|
|
secpp = sections;
|
1832 |
|
|
esym = external_syms;
|
1833 |
|
|
esymend = esym + symtab_hdr->sh_info;
|
1834 |
|
|
for (; esym < esymend; ++esym, ++isymp, ++secpp)
|
1835 |
|
|
{
|
1836 |
|
|
asection *isec;
|
1837 |
|
|
|
1838 |
|
|
bfd_elf32_swap_symbol_in (input_bfd, esym, isymp);
|
1839 |
|
|
|
1840 |
|
|
if (isymp->st_shndx == SHN_UNDEF)
|
1841 |
|
|
isec = bfd_und_section_ptr;
|
1842 |
|
|
else if (isymp->st_shndx > 0 && isymp->st_shndx < SHN_LORESERVE)
|
1843 |
|
|
isec = bfd_section_from_elf_index (input_bfd, isymp->st_shndx);
|
1844 |
|
|
else if (isymp->st_shndx == SHN_ABS)
|
1845 |
|
|
isec = bfd_abs_section_ptr;
|
1846 |
|
|
else if (isymp->st_shndx == SHN_COMMON)
|
1847 |
|
|
isec = bfd_com_section_ptr;
|
1848 |
|
|
else if (isymp->st_shndx == SHN_M32R_SCOMMON)
|
1849 |
|
|
isec = &m32r_elf_scom_section;
|
1850 |
|
|
else
|
1851 |
|
|
{
|
1852 |
|
|
/* Who knows? */
|
1853 |
|
|
isec = NULL;
|
1854 |
|
|
}
|
1855 |
|
|
|
1856 |
|
|
*secpp = isec;
|
1857 |
|
|
}
|
1858 |
|
|
|
1859 |
|
|
if (! m32r_elf_relocate_section (output_bfd, link_info, input_bfd,
|
1860 |
|
|
input_section, data, internal_relocs,
|
1861 |
|
|
internal_syms, sections))
|
1862 |
|
|
goto error_return;
|
1863 |
|
|
|
1864 |
|
|
if (sections != NULL)
|
1865 |
|
|
free (sections);
|
1866 |
|
|
sections = NULL;
|
1867 |
|
|
if (internal_syms != NULL)
|
1868 |
|
|
free (internal_syms);
|
1869 |
|
|
internal_syms = NULL;
|
1870 |
|
|
if (external_syms != NULL && symtab_hdr->contents == NULL)
|
1871 |
|
|
free (external_syms);
|
1872 |
|
|
external_syms = NULL;
|
1873 |
|
|
if (internal_relocs != elf_section_data (input_section)->relocs)
|
1874 |
|
|
free (internal_relocs);
|
1875 |
|
|
internal_relocs = NULL;
|
1876 |
|
|
}
|
1877 |
|
|
|
1878 |
|
|
return data;
|
1879 |
|
|
|
1880 |
|
|
error_return:
|
1881 |
|
|
if (internal_relocs != NULL
|
1882 |
|
|
&& internal_relocs != elf_section_data (input_section)->relocs)
|
1883 |
|
|
free (internal_relocs);
|
1884 |
|
|
if (external_syms != NULL && symtab_hdr->contents == NULL)
|
1885 |
|
|
free (external_syms);
|
1886 |
|
|
if (internal_syms != NULL)
|
1887 |
|
|
free (internal_syms);
|
1888 |
|
|
if (sections != NULL)
|
1889 |
|
|
free (sections);
|
1890 |
|
|
return NULL;
|
1891 |
|
|
}
|
1892 |
|
|
|
1893 |
|
|
#endif /* #if 0 */
|
1894 |
|
|
|
1895 |
|
|
/* Set the right machine number. */
|
1896 |
|
|
static boolean
|
1897 |
|
|
m32r_elf_object_p (abfd)
|
1898 |
|
|
bfd *abfd;
|
1899 |
|
|
{
|
1900 |
|
|
switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH)
|
1901 |
|
|
{
|
1902 |
|
|
default:
|
1903 |
|
|
case E_M32R_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r); break;
|
1904 |
|
|
case E_M32RX_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32rx); break;
|
1905 |
|
|
}
|
1906 |
|
|
return true;
|
1907 |
|
|
}
|
1908 |
|
|
|
1909 |
|
|
/* Store the machine number in the flags field. */
|
1910 |
|
|
static void
|
1911 |
|
|
m32r_elf_final_write_processing (abfd, linker)
|
1912 |
|
|
bfd * abfd;
|
1913 |
|
|
boolean linker ATTRIBUTE_UNUSED;
|
1914 |
|
|
{
|
1915 |
|
|
unsigned long val;
|
1916 |
|
|
|
1917 |
|
|
switch (bfd_get_mach (abfd))
|
1918 |
|
|
{
|
1919 |
|
|
default:
|
1920 |
|
|
case bfd_mach_m32r: val = E_M32R_ARCH; break;
|
1921 |
|
|
case bfd_mach_m32rx: val = E_M32RX_ARCH; break;
|
1922 |
|
|
}
|
1923 |
|
|
|
1924 |
|
|
elf_elfheader (abfd)->e_flags &=~ EF_M32R_ARCH;
|
1925 |
|
|
elf_elfheader (abfd)->e_flags |= val;
|
1926 |
|
|
}
|
1927 |
|
|
|
1928 |
|
|
/* Function to keep M32R specific file flags. */
|
1929 |
|
|
static boolean
|
1930 |
|
|
m32r_elf_set_private_flags (abfd, flags)
|
1931 |
|
|
bfd * abfd;
|
1932 |
|
|
flagword flags;
|
1933 |
|
|
{
|
1934 |
|
|
BFD_ASSERT (!elf_flags_init (abfd)
|
1935 |
|
|
|| elf_elfheader (abfd)->e_flags == flags);
|
1936 |
|
|
|
1937 |
|
|
elf_elfheader (abfd)->e_flags = flags;
|
1938 |
|
|
elf_flags_init (abfd) = true;
|
1939 |
|
|
return true;
|
1940 |
|
|
}
|
1941 |
|
|
|
1942 |
|
|
/* Copy backend specific data from one object module to another */
|
1943 |
|
|
static boolean
|
1944 |
|
|
m32r_elf_copy_private_bfd_data (ibfd, obfd)
|
1945 |
|
|
bfd * ibfd;
|
1946 |
|
|
bfd * obfd;
|
1947 |
|
|
{
|
1948 |
|
|
if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
1949 |
|
|
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
1950 |
|
|
return true;
|
1951 |
|
|
|
1952 |
|
|
BFD_ASSERT (!elf_flags_init (obfd)
|
1953 |
|
|
|| (elf_elfheader (obfd)->e_flags
|
1954 |
|
|
== elf_elfheader (ibfd)->e_flags));
|
1955 |
|
|
|
1956 |
|
|
elf_gp (obfd) = elf_gp (ibfd);
|
1957 |
|
|
elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
|
1958 |
|
|
elf_flags_init (obfd) = true;
|
1959 |
|
|
return true;
|
1960 |
|
|
}
|
1961 |
|
|
|
1962 |
|
|
/* Merge backend specific data from an object file to the output
|
1963 |
|
|
object file when linking. */
|
1964 |
|
|
static boolean
|
1965 |
|
|
m32r_elf_merge_private_bfd_data (ibfd, obfd)
|
1966 |
|
|
bfd * ibfd;
|
1967 |
|
|
bfd * obfd;
|
1968 |
|
|
{
|
1969 |
|
|
flagword out_flags;
|
1970 |
|
|
flagword in_flags;
|
1971 |
|
|
|
1972 |
|
|
if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
1973 |
|
|
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
1974 |
|
|
return true;
|
1975 |
|
|
|
1976 |
|
|
in_flags = elf_elfheader (ibfd)->e_flags;
|
1977 |
|
|
out_flags = elf_elfheader (obfd)->e_flags;
|
1978 |
|
|
|
1979 |
|
|
if (! elf_flags_init (obfd))
|
1980 |
|
|
{
|
1981 |
|
|
/* If the input is the default architecture then do not
|
1982 |
|
|
bother setting the flags for the output architecture,
|
1983 |
|
|
instead allow future merges to do this. If no future
|
1984 |
|
|
merges ever set these flags then they will retain their
|
1985 |
|
|
unitialised values, which surprise surprise, correspond
|
1986 |
|
|
to the default values. */
|
1987 |
|
|
if (bfd_get_arch_info (ibfd)->the_default)
|
1988 |
|
|
return true;
|
1989 |
|
|
|
1990 |
|
|
elf_flags_init (obfd) = true;
|
1991 |
|
|
elf_elfheader (obfd)->e_flags = in_flags;
|
1992 |
|
|
|
1993 |
|
|
if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
|
1994 |
|
|
&& bfd_get_arch_info (obfd)->the_default)
|
1995 |
|
|
{
|
1996 |
|
|
return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
|
1997 |
|
|
}
|
1998 |
|
|
|
1999 |
|
|
return true;
|
2000 |
|
|
}
|
2001 |
|
|
|
2002 |
|
|
/* Check flag compatibility. */
|
2003 |
|
|
if (in_flags == out_flags)
|
2004 |
|
|
return true;
|
2005 |
|
|
|
2006 |
|
|
if ((in_flags & EF_M32R_ARCH) != (out_flags & EF_M32R_ARCH))
|
2007 |
|
|
{
|
2008 |
|
|
if ((in_flags & EF_M32R_ARCH) != E_M32R_ARCH)
|
2009 |
|
|
{
|
2010 |
|
|
_bfd_error_handler (_("%s: Instruction set mismatch with previous modules"),
|
2011 |
|
|
bfd_get_filename (ibfd));
|
2012 |
|
|
|
2013 |
|
|
bfd_set_error (bfd_error_bad_value);
|
2014 |
|
|
return false;
|
2015 |
|
|
}
|
2016 |
|
|
}
|
2017 |
|
|
|
2018 |
|
|
return true;
|
2019 |
|
|
}
|
2020 |
|
|
|
2021 |
|
|
/* Display the flags field */
|
2022 |
|
|
static boolean
|
2023 |
|
|
m32r_elf_print_private_bfd_data (abfd, ptr)
|
2024 |
|
|
bfd * abfd;
|
2025 |
|
|
PTR ptr;
|
2026 |
|
|
{
|
2027 |
|
|
FILE * file = (FILE *) ptr;
|
2028 |
|
|
|
2029 |
|
|
BFD_ASSERT (abfd != NULL && ptr != NULL)
|
2030 |
|
|
|
2031 |
|
|
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
2032 |
|
|
|
2033 |
|
|
fprintf (file, _("private flags = %lx"), elf_elfheader (abfd)->e_flags);
|
2034 |
|
|
|
2035 |
|
|
switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH)
|
2036 |
|
|
{
|
2037 |
|
|
default:
|
2038 |
|
|
case E_M32R_ARCH: fprintf (file, _(": m32r instructions")); break;
|
2039 |
|
|
case E_M32RX_ARCH: fprintf (file, _(": m32rx instructions")); break;
|
2040 |
|
|
}
|
2041 |
|
|
|
2042 |
|
|
fputc ('\n', file);
|
2043 |
|
|
|
2044 |
|
|
return true;
|
2045 |
|
|
}
|
2046 |
|
|
|
2047 |
|
|
asection *
|
2048 |
|
|
m32r_elf_gc_mark_hook (abfd, info, rel, h, sym)
|
2049 |
|
|
bfd *abfd;
|
2050 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
2051 |
|
|
Elf_Internal_Rela *rel;
|
2052 |
|
|
struct elf_link_hash_entry *h;
|
2053 |
|
|
Elf_Internal_Sym *sym;
|
2054 |
|
|
{
|
2055 |
|
|
if (h != NULL)
|
2056 |
|
|
{
|
2057 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
2058 |
|
|
{
|
2059 |
|
|
case R_M32R_GNU_VTINHERIT:
|
2060 |
|
|
case R_M32R_GNU_VTENTRY:
|
2061 |
|
|
break;
|
2062 |
|
|
|
2063 |
|
|
default:
|
2064 |
|
|
switch (h->root.type)
|
2065 |
|
|
{
|
2066 |
|
|
case bfd_link_hash_defined:
|
2067 |
|
|
case bfd_link_hash_defweak:
|
2068 |
|
|
return h->root.u.def.section;
|
2069 |
|
|
|
2070 |
|
|
case bfd_link_hash_common:
|
2071 |
|
|
return h->root.u.c.p->section;
|
2072 |
|
|
|
2073 |
|
|
default:
|
2074 |
|
|
break;
|
2075 |
|
|
}
|
2076 |
|
|
}
|
2077 |
|
|
}
|
2078 |
|
|
else
|
2079 |
|
|
{
|
2080 |
|
|
if (!(elf_bad_symtab (abfd)
|
2081 |
|
|
&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
|
2082 |
|
|
&& ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
|
2083 |
|
|
&& sym->st_shndx != SHN_COMMON))
|
2084 |
|
|
{
|
2085 |
|
|
return bfd_section_from_elf_index (abfd, sym->st_shndx);
|
2086 |
|
|
}
|
2087 |
|
|
}
|
2088 |
|
|
return NULL;
|
2089 |
|
|
}
|
2090 |
|
|
|
2091 |
|
|
static boolean
|
2092 |
|
|
m32r_elf_gc_sweep_hook (abfd, info, sec, relocs)
|
2093 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
2094 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
2095 |
|
|
asection *sec ATTRIBUTE_UNUSED;
|
2096 |
|
|
const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
|
2097 |
|
|
{
|
2098 |
|
|
/* we don't use got and plt entries for m32r */
|
2099 |
|
|
return true;
|
2100 |
|
|
}
|
2101 |
|
|
|
2102 |
|
|
|
2103 |
|
|
/* Look through the relocs for a section during the first phase.
|
2104 |
|
|
Since we don't do .gots or .plts, we just need to consider the
|
2105 |
|
|
virtual table relocs for gc. */
|
2106 |
|
|
|
2107 |
|
|
static boolean
|
2108 |
|
|
m32r_elf_check_relocs (abfd, info, sec, relocs)
|
2109 |
|
|
bfd *abfd;
|
2110 |
|
|
struct bfd_link_info *info;
|
2111 |
|
|
asection *sec;
|
2112 |
|
|
const Elf_Internal_Rela *relocs;
|
2113 |
|
|
{
|
2114 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
2115 |
|
|
struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
|
2116 |
|
|
const Elf_Internal_Rela *rel;
|
2117 |
|
|
const Elf_Internal_Rela *rel_end;
|
2118 |
|
|
|
2119 |
|
|
if (info->relocateable)
|
2120 |
|
|
return true;
|
2121 |
|
|
|
2122 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
2123 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
2124 |
|
|
sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
|
2125 |
|
|
if (!elf_bad_symtab (abfd))
|
2126 |
|
|
sym_hashes_end -= symtab_hdr->sh_info;
|
2127 |
|
|
|
2128 |
|
|
rel_end = relocs + sec->reloc_count;
|
2129 |
|
|
for (rel = relocs; rel < rel_end; rel++)
|
2130 |
|
|
{
|
2131 |
|
|
struct elf_link_hash_entry *h;
|
2132 |
|
|
unsigned long r_symndx;
|
2133 |
|
|
|
2134 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
2135 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
2136 |
|
|
h = NULL;
|
2137 |
|
|
else
|
2138 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
2139 |
|
|
|
2140 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
2141 |
|
|
{
|
2142 |
|
|
/* This relocation describes the C++ object vtable hierarchy.
|
2143 |
|
|
Reconstruct it for later use during GC. */
|
2144 |
|
|
case R_M32R_GNU_VTINHERIT:
|
2145 |
|
|
if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
2146 |
|
|
return false;
|
2147 |
|
|
break;
|
2148 |
|
|
|
2149 |
|
|
/* This relocation describes which C++ vtable entries are actually
|
2150 |
|
|
used. Record for later use during GC. */
|
2151 |
|
|
case R_M32R_GNU_VTENTRY:
|
2152 |
|
|
if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
|
2153 |
|
|
return false;
|
2154 |
|
|
break;
|
2155 |
|
|
}
|
2156 |
|
|
}
|
2157 |
|
|
|
2158 |
|
|
return true;
|
2159 |
|
|
}
|
2160 |
|
|
|
2161 |
|
|
|
2162 |
|
|
|
2163 |
|
|
|
2164 |
|
|
#define ELF_ARCH bfd_arch_m32r
|
2165 |
|
|
#define ELF_MACHINE_CODE EM_CYGNUS_M32R
|
2166 |
|
|
#define ELF_MAXPAGESIZE 0x1 /* Explicitly requested by Mitsubishi. */
|
2167 |
|
|
|
2168 |
|
|
#define TARGET_BIG_SYM bfd_elf32_m32r_vec
|
2169 |
|
|
#define TARGET_BIG_NAME "elf32-m32r"
|
2170 |
|
|
|
2171 |
|
|
#define elf_info_to_howto 0
|
2172 |
|
|
#define elf_info_to_howto_rel m32r_info_to_howto_rel
|
2173 |
|
|
#define elf_backend_section_from_bfd_section _bfd_m32r_elf_section_from_bfd_section
|
2174 |
|
|
#define elf_backend_symbol_processing _bfd_m32r_elf_symbol_processing
|
2175 |
|
|
#define elf_backend_add_symbol_hook m32r_elf_add_symbol_hook
|
2176 |
|
|
#define elf_backend_relocate_section m32r_elf_relocate_section
|
2177 |
|
|
#define elf_backend_gc_mark_hook m32r_elf_gc_mark_hook
|
2178 |
|
|
#define elf_backend_gc_sweep_hook m32r_elf_gc_sweep_hook
|
2179 |
|
|
#define elf_backend_check_relocs m32r_elf_check_relocs
|
2180 |
|
|
|
2181 |
|
|
#define elf_backend_can_gc_sections 1
|
2182 |
|
|
#if 0 /* not yet */
|
2183 |
|
|
/* relax support */
|
2184 |
|
|
#define bfd_elf32_bfd_relax_section m32r_elf_relax_section
|
2185 |
|
|
#define bfd_elf32_bfd_get_relocated_section_contents \
|
2186 |
|
|
m32r_elf_get_relocated_section_contents
|
2187 |
|
|
#endif
|
2188 |
|
|
|
2189 |
|
|
#define elf_backend_object_p m32r_elf_object_p
|
2190 |
|
|
#define elf_backend_final_write_processing m32r_elf_final_write_processing
|
2191 |
|
|
#define bfd_elf32_bfd_copy_private_bfd_data m32r_elf_copy_private_bfd_data
|
2192 |
|
|
#define bfd_elf32_bfd_merge_private_bfd_data m32r_elf_merge_private_bfd_data
|
2193 |
|
|
#define bfd_elf32_bfd_set_private_flags m32r_elf_set_private_flags
|
2194 |
|
|
#define bfd_elf32_bfd_print_private_bfd_data m32r_elf_print_private_bfd_data
|
2195 |
|
|
|
2196 |
|
|
#include "elf32-target.h"
|