4601 lines
136 KiB
C
4601 lines
136 KiB
C
/* Hitachi SH specific support for 32-bit ELF
|
||
Copyright 1996, 1997, 1998, 1999, 2000, 2001
|
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Free Software Foundation, Inc.
|
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Contributed by Ian Lance Taylor, Cygnus Support.
|
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This file is part of BFD, the Binary File Descriptor library.
|
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|
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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
|
||
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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|
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/sh.h"
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|
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static bfd_reloc_status_type sh_elf_reloc
|
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type sh_elf_ignore_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static reloc_howto_type *sh_elf_reloc_type_lookup
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PARAMS ((bfd *, bfd_reloc_code_real_type));
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static void sh_elf_info_to_howto
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PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
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static boolean sh_elf_set_private_flags
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PARAMS ((bfd *, flagword));
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static boolean sh_elf_copy_private_data
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PARAMS ((bfd *, bfd *));
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static boolean sh_elf_merge_private_data
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PARAMS ((bfd *, bfd *));
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static boolean sh_elf_set_mach_from_flags
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PARAMS ((bfd *));
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static boolean sh_elf_relax_section
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PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
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static boolean sh_elf_relax_delete_bytes
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PARAMS ((bfd *, asection *, bfd_vma, int));
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static boolean sh_elf_align_loads
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PARAMS ((bfd *, asection *, Elf_Internal_Rela *, bfd_byte *, boolean *));
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static boolean sh_elf_swap_insns
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PARAMS ((bfd *, asection *, PTR, bfd_byte *, bfd_vma));
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static boolean sh_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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static bfd_byte *sh_elf_get_relocated_section_contents
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PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
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bfd_byte *, boolean, asymbol **));
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static boolean sh_elf_check_relocs
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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static struct bfd_hash_entry *sh_elf_link_hash_newfunc
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PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
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static struct bfd_link_hash_table *sh_elf_link_hash_table_create
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PARAMS ((bfd *));
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static boolean sh_elf_adjust_dynamic_symbol
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PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
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static boolean sh_elf_size_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static boolean sh_elf_finish_dynamic_symbol
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PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
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Elf_Internal_Sym *));
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static boolean sh_elf_finish_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static bfd_reloc_status_type sh_elf_reloc_loop
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PARAMS ((int, bfd *, asection *, bfd_byte *, bfd_vma, asection *,
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bfd_vma, bfd_vma));
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static boolean sh_elf_create_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static asection * sh_elf_gc_mark_hook
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PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
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struct elf_link_hash_entry *, Elf_Internal_Sym *));
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static boolean sh_elf_gc_sweep_hook
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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static enum elf_reloc_type_class sh_elf_reloc_type_class
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PARAMS ((const Elf_Internal_Rela *));
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/* The name of the dynamic interpreter. This is put in the .interp
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section. */
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#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
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static reloc_howto_type sh_elf_howto_table[] =
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{
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/* No relocation. */
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HOWTO (R_SH_NONE, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* 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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sh_elf_ignore_reloc, /* special_function */
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"R_SH_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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||
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||
/* 32 bit absolute relocation. Setting partial_inplace to true and
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src_mask to a non-zero value is similar to the COFF toolchain. */
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HOWTO (R_SH_DIR32, /* 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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sh_elf_reloc, /* special_function */
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"R_SH_DIR32", /* 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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||
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/* 32 bit PC relative relocation. */
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HOWTO (R_SH_REL32, /* 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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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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sh_elf_ignore_reloc, /* special_function */
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"R_SH_REL32", /* 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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true), /* pcrel_offset */
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/* 8 bit PC relative branch divided by 2. */
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HOWTO (R_SH_DIR8WPN, /* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* 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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sh_elf_ignore_reloc, /* special_function */
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"R_SH_DIR8WPN", /* name */
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true, /* 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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/* 12 bit PC relative branch divided by 2. */
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HOWTO (R_SH_IND12W, /* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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12, /* 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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sh_elf_reloc, /* special_function */
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"R_SH_IND12W", /* name */
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true, /* partial_inplace */
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0xfff, /* src_mask */
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0xfff, /* dst_mask */
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true), /* pcrel_offset */
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||
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/* 8 bit unsigned PC relative divided by 4. */
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HOWTO (R_SH_DIR8WPL, /* type */
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2, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_unsigned, /* complain_on_overflow */
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sh_elf_ignore_reloc, /* special_function */
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"R_SH_DIR8WPL", /* name */
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true, /* 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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/* 8 bit unsigned PC relative divided by 2. */
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HOWTO (R_SH_DIR8WPZ, /* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_unsigned, /* complain_on_overflow */
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sh_elf_ignore_reloc, /* special_function */
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"R_SH_DIR8WPZ", /* name */
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true, /* 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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||
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/* 8 bit GBR relative. FIXME: This only makes sense if we have some
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special symbol for the GBR relative area, and that is not
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implemented. */
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HOWTO (R_SH_DIR8BP, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_unsigned, /* complain_on_overflow */
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sh_elf_ignore_reloc, /* special_function */
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"R_SH_DIR8BP", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xff, /* dst_mask */
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true), /* pcrel_offset */
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||
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/* 8 bit GBR relative divided by 2. FIXME: This only makes sense if
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we have some special symbol for the GBR relative area, and that
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is not implemented. */
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HOWTO (R_SH_DIR8W, /* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_unsigned, /* complain_on_overflow */
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sh_elf_ignore_reloc, /* special_function */
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"R_SH_DIR8W", /* name */
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||
false, /* partial_inplace */
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||
0, /* src_mask */
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||
0xff, /* dst_mask */
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||
true), /* pcrel_offset */
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||
|
||
/* 8 bit GBR relative divided by 4. FIXME: This only makes sense if
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||
we have some special symbol for the GBR relative area, and that
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||
is not implemented. */
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||
HOWTO (R_SH_DIR8L, /* type */
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2, /* rightshift */
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||
1, /* size (0 = byte, 1 = short, 2 = long) */
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||
8, /* bitsize */
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||
false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_unsigned, /* complain_on_overflow */
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sh_elf_ignore_reloc, /* special_function */
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||
"R_SH_DIR8L", /* name */
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||
false, /* partial_inplace */
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||
0, /* src_mask */
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||
0xff, /* dst_mask */
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||
true), /* pcrel_offset */
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||
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EMPTY_HOWTO (10),
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EMPTY_HOWTO (11),
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EMPTY_HOWTO (12),
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EMPTY_HOWTO (13),
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EMPTY_HOWTO (14),
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EMPTY_HOWTO (15),
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EMPTY_HOWTO (16),
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EMPTY_HOWTO (17),
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||
EMPTY_HOWTO (18),
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||
EMPTY_HOWTO (19),
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||
EMPTY_HOWTO (20),
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||
EMPTY_HOWTO (21),
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||
EMPTY_HOWTO (22),
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EMPTY_HOWTO (23),
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EMPTY_HOWTO (24),
|
||
|
||
/* The remaining relocs are a GNU extension used for relaxing. The
|
||
final pass of the linker never needs to do anything with any of
|
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these relocs. Any required operations are handled by the
|
||
relaxation code. */
|
||
|
||
/* A 16 bit switch table entry. This is generated for an expression
|
||
such as ``.word L1 - L2''. The offset holds the difference
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||
between the reloc address and L2. */
|
||
HOWTO (R_SH_SWITCH16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_unsigned, /* complain_on_overflow */
|
||
sh_elf_ignore_reloc, /* special_function */
|
||
"R_SH_SWITCH16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A 32 bit switch table entry. This is generated for an expression
|
||
such as ``.long L1 - L2''. The offset holds the difference
|
||
between the reloc address and L2. */
|
||
HOWTO (R_SH_SWITCH32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_unsigned, /* complain_on_overflow */
|
||
sh_elf_ignore_reloc, /* special_function */
|
||
"R_SH_SWITCH32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* Indicates a .uses pseudo-op. The compiler will generate .uses
|
||
pseudo-ops when it finds a function call which can be relaxed.
|
||
The offset field holds the PC relative offset to the instruction
|
||
which loads the register used in the function call. */
|
||
HOWTO (R_SH_USES, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_unsigned, /* complain_on_overflow */
|
||
sh_elf_ignore_reloc, /* special_function */
|
||
"R_SH_USES", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* The assembler will generate this reloc for addresses referred to
|
||
by the register loads associated with USES relocs. The offset
|
||
field holds the number of times the address is referenced in the
|
||
object file. */
|
||
HOWTO (R_SH_COUNT, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_unsigned, /* complain_on_overflow */
|
||
sh_elf_ignore_reloc, /* special_function */
|
||
"R_SH_COUNT", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* Indicates an alignment statement. The offset field is the power
|
||
of 2 to which subsequent portions of the object file must be
|
||
aligned. */
|
||
HOWTO (R_SH_ALIGN, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_unsigned, /* complain_on_overflow */
|
||
sh_elf_ignore_reloc, /* special_function */
|
||
"R_SH_ALIGN", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* The assembler will generate this reloc before a block of
|
||
instructions. A section should be processed as assumining it
|
||
contains data, unless this reloc is seen. */
|
||
HOWTO (R_SH_CODE, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_unsigned, /* complain_on_overflow */
|
||
sh_elf_ignore_reloc, /* special_function */
|
||
"R_SH_CODE", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* The assembler will generate this reloc after a block of
|
||
instructions when it sees data that is not instructions. */
|
||
HOWTO (R_SH_DATA, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_unsigned, /* complain_on_overflow */
|
||
sh_elf_ignore_reloc, /* special_function */
|
||
"R_SH_DATA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* The assembler generates this reloc for each label within a block
|
||
of instructions. This permits the linker to avoid swapping
|
||
instructions which are the targets of branches. */
|
||
HOWTO (R_SH_LABEL, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_unsigned, /* complain_on_overflow */
|
||
sh_elf_ignore_reloc, /* special_function */
|
||
"R_SH_LABEL", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* An 8 bit switch table entry. This is generated for an expression
|
||
such as ``.word L1 - L2''. The offset holds the difference
|
||
between the reloc address and L2. */
|
||
HOWTO (R_SH_SWITCH8, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
8, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_unsigned, /* complain_on_overflow */
|
||
sh_elf_ignore_reloc, /* special_function */
|
||
"R_SH_SWITCH8", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* GNU extension to record C++ vtable hierarchy */
|
||
HOWTO (R_SH_GNU_VTINHERIT, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
NULL, /* special_function */
|
||
"R_SH_GNU_VTINHERIT", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* GNU extension to record C++ vtable member usage */
|
||
HOWTO (R_SH_GNU_VTENTRY, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
_bfd_elf_rel_vtable_reloc_fn, /* special_function */
|
||
"R_SH_GNU_VTENTRY", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 8 bit PC relative divided by 2 - but specified in a very odd way. */
|
||
HOWTO (R_SH_LOOP_START, /* type */
|
||
1, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
8, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
sh_elf_ignore_reloc, /* special_function */
|
||
"R_SH_LOOP_START", /* name */
|
||
true, /* partial_inplace */
|
||
0xff, /* src_mask */
|
||
0xff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* 8 bit PC relative divided by 2 - but specified in a very odd way. */
|
||
HOWTO (R_SH_LOOP_END, /* type */
|
||
1, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
8, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
sh_elf_ignore_reloc, /* special_function */
|
||
"R_SH_LOOP_END", /* name */
|
||
true, /* partial_inplace */
|
||
0xff, /* src_mask */
|
||
0xff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
EMPTY_HOWTO (38),
|
||
EMPTY_HOWTO (39),
|
||
EMPTY_HOWTO (40),
|
||
EMPTY_HOWTO (41),
|
||
EMPTY_HOWTO (42),
|
||
EMPTY_HOWTO (43),
|
||
EMPTY_HOWTO (44),
|
||
EMPTY_HOWTO (45),
|
||
EMPTY_HOWTO (46),
|
||
EMPTY_HOWTO (47),
|
||
EMPTY_HOWTO (48),
|
||
EMPTY_HOWTO (49),
|
||
EMPTY_HOWTO (50),
|
||
EMPTY_HOWTO (51),
|
||
EMPTY_HOWTO (52),
|
||
EMPTY_HOWTO (53),
|
||
EMPTY_HOWTO (54),
|
||
EMPTY_HOWTO (55),
|
||
EMPTY_HOWTO (56),
|
||
EMPTY_HOWTO (57),
|
||
EMPTY_HOWTO (58),
|
||
EMPTY_HOWTO (59),
|
||
EMPTY_HOWTO (60),
|
||
EMPTY_HOWTO (61),
|
||
EMPTY_HOWTO (62),
|
||
EMPTY_HOWTO (63),
|
||
EMPTY_HOWTO (64),
|
||
EMPTY_HOWTO (65),
|
||
EMPTY_HOWTO (66),
|
||
EMPTY_HOWTO (67),
|
||
EMPTY_HOWTO (68),
|
||
EMPTY_HOWTO (69),
|
||
EMPTY_HOWTO (70),
|
||
EMPTY_HOWTO (71),
|
||
EMPTY_HOWTO (72),
|
||
EMPTY_HOWTO (73),
|
||
EMPTY_HOWTO (74),
|
||
EMPTY_HOWTO (75),
|
||
EMPTY_HOWTO (76),
|
||
EMPTY_HOWTO (77),
|
||
EMPTY_HOWTO (78),
|
||
EMPTY_HOWTO (79),
|
||
EMPTY_HOWTO (80),
|
||
EMPTY_HOWTO (81),
|
||
EMPTY_HOWTO (82),
|
||
EMPTY_HOWTO (83),
|
||
EMPTY_HOWTO (84),
|
||
EMPTY_HOWTO (85),
|
||
EMPTY_HOWTO (86),
|
||
EMPTY_HOWTO (87),
|
||
EMPTY_HOWTO (88),
|
||
EMPTY_HOWTO (89),
|
||
EMPTY_HOWTO (90),
|
||
EMPTY_HOWTO (91),
|
||
EMPTY_HOWTO (92),
|
||
EMPTY_HOWTO (93),
|
||
EMPTY_HOWTO (94),
|
||
EMPTY_HOWTO (95),
|
||
EMPTY_HOWTO (96),
|
||
EMPTY_HOWTO (97),
|
||
EMPTY_HOWTO (98),
|
||
EMPTY_HOWTO (99),
|
||
EMPTY_HOWTO (100),
|
||
EMPTY_HOWTO (101),
|
||
EMPTY_HOWTO (102),
|
||
EMPTY_HOWTO (103),
|
||
EMPTY_HOWTO (104),
|
||
EMPTY_HOWTO (105),
|
||
EMPTY_HOWTO (106),
|
||
EMPTY_HOWTO (107),
|
||
EMPTY_HOWTO (108),
|
||
EMPTY_HOWTO (109),
|
||
EMPTY_HOWTO (110),
|
||
EMPTY_HOWTO (111),
|
||
EMPTY_HOWTO (112),
|
||
EMPTY_HOWTO (113),
|
||
EMPTY_HOWTO (114),
|
||
EMPTY_HOWTO (115),
|
||
EMPTY_HOWTO (116),
|
||
EMPTY_HOWTO (117),
|
||
EMPTY_HOWTO (118),
|
||
EMPTY_HOWTO (119),
|
||
EMPTY_HOWTO (120),
|
||
EMPTY_HOWTO (121),
|
||
EMPTY_HOWTO (122),
|
||
EMPTY_HOWTO (123),
|
||
EMPTY_HOWTO (124),
|
||
EMPTY_HOWTO (125),
|
||
EMPTY_HOWTO (126),
|
||
EMPTY_HOWTO (127),
|
||
EMPTY_HOWTO (128),
|
||
EMPTY_HOWTO (129),
|
||
EMPTY_HOWTO (130),
|
||
EMPTY_HOWTO (131),
|
||
EMPTY_HOWTO (132),
|
||
EMPTY_HOWTO (133),
|
||
EMPTY_HOWTO (134),
|
||
EMPTY_HOWTO (135),
|
||
EMPTY_HOWTO (136),
|
||
EMPTY_HOWTO (137),
|
||
EMPTY_HOWTO (138),
|
||
EMPTY_HOWTO (139),
|
||
EMPTY_HOWTO (140),
|
||
EMPTY_HOWTO (141),
|
||
EMPTY_HOWTO (142),
|
||
EMPTY_HOWTO (143),
|
||
EMPTY_HOWTO (144),
|
||
EMPTY_HOWTO (145),
|
||
EMPTY_HOWTO (146),
|
||
EMPTY_HOWTO (147),
|
||
EMPTY_HOWTO (148),
|
||
EMPTY_HOWTO (149),
|
||
EMPTY_HOWTO (150),
|
||
EMPTY_HOWTO (151),
|
||
EMPTY_HOWTO (152),
|
||
EMPTY_HOWTO (153),
|
||
EMPTY_HOWTO (154),
|
||
EMPTY_HOWTO (155),
|
||
EMPTY_HOWTO (156),
|
||
EMPTY_HOWTO (157),
|
||
EMPTY_HOWTO (158),
|
||
EMPTY_HOWTO (159),
|
||
|
||
HOWTO (R_SH_GOT32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* */
|
||
"R_SH_GOT32", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
HOWTO (R_SH_PLT32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* */
|
||
"R_SH_PLT32", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
HOWTO (R_SH_COPY, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* */
|
||
"R_SH_COPY", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
HOWTO (R_SH_GLOB_DAT, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* */
|
||
"R_SH_GLOB_DAT", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
HOWTO (R_SH_JMP_SLOT, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* */
|
||
"R_SH_JMP_SLOT", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
HOWTO (R_SH_RELATIVE, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* */
|
||
"R_SH_RELATIVE", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
HOWTO (R_SH_GOTOFF, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* */
|
||
"R_SH_GOTOFF", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
HOWTO (R_SH_GOTPC, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* */
|
||
"R_SH_GOTPC", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
};
|
||
|
||
static bfd_reloc_status_type
|
||
sh_elf_reloc_loop (r_type, input_bfd, input_section, contents, addr,
|
||
symbol_section, start, end)
|
||
int r_type ATTRIBUTE_UNUSED;
|
||
bfd *input_bfd;
|
||
asection *input_section;
|
||
bfd_byte *contents;
|
||
bfd_vma addr;
|
||
asection *symbol_section;
|
||
bfd_vma start, end;
|
||
{
|
||
static bfd_vma last_addr;
|
||
static asection *last_symbol_section;
|
||
bfd_byte *free_contents = NULL;
|
||
bfd_byte *start_ptr, *ptr, *last_ptr;
|
||
int diff, cum_diff;
|
||
bfd_signed_vma x;
|
||
int insn;
|
||
|
||
/* Sanity check the address. */
|
||
if (addr > input_section->_raw_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
/* We require the start and end relocations to be processed consecutively -
|
||
although we allow then to be processed forwards or backwards. */
|
||
if (! last_addr)
|
||
{
|
||
last_addr = addr;
|
||
last_symbol_section = symbol_section;
|
||
return bfd_reloc_ok;
|
||
}
|
||
if (last_addr != addr)
|
||
abort ();
|
||
last_addr = 0;
|
||
|
||
if (! symbol_section || last_symbol_section != symbol_section || end < start)
|
||
return bfd_reloc_outofrange;
|
||
|
||
/* Get the symbol_section contents. */
|
||
if (symbol_section != input_section)
|
||
{
|
||
if (elf_section_data (symbol_section)->this_hdr.contents != NULL)
|
||
contents = elf_section_data (symbol_section)->this_hdr.contents;
|
||
else
|
||
{
|
||
contents = (bfd_byte *) bfd_malloc (symbol_section->_raw_size);
|
||
if (contents == NULL)
|
||
return bfd_reloc_outofrange;
|
||
free_contents = contents;
|
||
if (! bfd_get_section_contents (input_bfd, symbol_section, contents,
|
||
(file_ptr) 0,
|
||
symbol_section->_raw_size))
|
||
{
|
||
free (contents);
|
||
return bfd_reloc_outofrange;
|
||
}
|
||
}
|
||
}
|
||
#define IS_PPI(PTR) ((bfd_get_16 (input_bfd, (PTR)) & 0xfc00) == 0xf800)
|
||
start_ptr = contents + start;
|
||
for (cum_diff = -6, ptr = contents + end; cum_diff < 0 && ptr > start_ptr;)
|
||
{
|
||
for (last_ptr = ptr, ptr -= 4; ptr >= start_ptr && IS_PPI (ptr);)
|
||
ptr -= 2;
|
||
ptr += 2;
|
||
diff = (last_ptr - ptr) >> 1;
|
||
cum_diff += diff & 1;
|
||
cum_diff += diff;
|
||
}
|
||
/* Calculate the start / end values to load into rs / re minus four -
|
||
so that will cancel out the four we would otherwise have to add to
|
||
addr to get the value to subtract in order to get relative addressing. */
|
||
if (cum_diff >= 0)
|
||
{
|
||
start -= 4;
|
||
end = (ptr + cum_diff * 2) - contents;
|
||
}
|
||
else
|
||
{
|
||
bfd_vma start0 = start - 4;
|
||
|
||
while (start0 && IS_PPI (contents + start0))
|
||
start0 -= 2;
|
||
start0 = start - 2 - ((start - start0) & 2);
|
||
start = start0 - cum_diff - 2;
|
||
end = start0;
|
||
}
|
||
|
||
if (free_contents)
|
||
free (free_contents);
|
||
|
||
insn = bfd_get_16 (input_bfd, contents + addr);
|
||
|
||
x = (insn & 0x200 ? end : start) - addr;
|
||
if (input_section != symbol_section)
|
||
x += ((symbol_section->output_section->vma + symbol_section->output_offset)
|
||
- (input_section->output_section->vma
|
||
+ input_section->output_offset));
|
||
x >>= 1;
|
||
if (x < -128 || x > 127)
|
||
return bfd_reloc_overflow;
|
||
|
||
x = (insn & ~0xff) | (x & 0xff);
|
||
bfd_put_16 (input_bfd, (bfd_vma) x, contents + addr);
|
||
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* This function is used for normal relocs. This used to be like the COFF
|
||
function, and is almost certainly incorrect for other ELF targets. */
|
||
|
||
static bfd_reloc_status_type
|
||
sh_elf_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
|
||
error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol_in;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message ATTRIBUTE_UNUSED;
|
||
{
|
||
unsigned long insn;
|
||
bfd_vma sym_value;
|
||
enum elf_sh_reloc_type r_type;
|
||
bfd_vma addr = reloc_entry->address;
|
||
bfd_byte *hit_data = addr + (bfd_byte *) data;
|
||
|
||
r_type = (enum elf_sh_reloc_type) reloc_entry->howto->type;
|
||
|
||
if (output_bfd != NULL)
|
||
{
|
||
/* Partial linking--do nothing. */
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* Almost all relocs have to do with relaxing. If any work must be
|
||
done for them, it has been done in sh_relax_section. */
|
||
if (r_type == R_SH_IND12W && (symbol_in->flags & BSF_LOCAL) != 0)
|
||
return bfd_reloc_ok;
|
||
|
||
if (symbol_in != NULL
|
||
&& bfd_is_und_section (symbol_in->section))
|
||
return bfd_reloc_undefined;
|
||
|
||
if (bfd_is_com_section (symbol_in->section))
|
||
sym_value = 0;
|
||
else
|
||
sym_value = (symbol_in->value +
|
||
symbol_in->section->output_section->vma +
|
||
symbol_in->section->output_offset);
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_SH_DIR32:
|
||
insn = bfd_get_32 (abfd, hit_data);
|
||
insn += sym_value + reloc_entry->addend;
|
||
bfd_put_32 (abfd, (bfd_vma) insn, hit_data);
|
||
break;
|
||
case R_SH_IND12W:
|
||
insn = bfd_get_16 (abfd, hit_data);
|
||
sym_value += reloc_entry->addend;
|
||
sym_value -= (input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
+ addr
|
||
+ 4);
|
||
sym_value += (insn & 0xfff) << 1;
|
||
if (insn & 0x800)
|
||
sym_value -= 0x1000;
|
||
insn = (insn & 0xf000) | (sym_value & 0xfff);
|
||
bfd_put_16 (abfd, (bfd_vma) insn, hit_data);
|
||
if (sym_value < (bfd_vma) -0x1000 || sym_value >= 0x1000)
|
||
return bfd_reloc_overflow;
|
||
break;
|
||
default:
|
||
abort ();
|
||
break;
|
||
}
|
||
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* This function is used for relocs which are only used for relaxing,
|
||
which the linker should otherwise ignore. */
|
||
|
||
static bfd_reloc_status_type
|
||
sh_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section,
|
||
output_bfd, error_message)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol ATTRIBUTE_UNUSED;
|
||
PTR data ATTRIBUTE_UNUSED;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message ATTRIBUTE_UNUSED;
|
||
{
|
||
if (output_bfd != NULL)
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* This structure is used to map BFD reloc codes to SH ELF relocs. */
|
||
|
||
struct elf_reloc_map
|
||
{
|
||
bfd_reloc_code_real_type bfd_reloc_val;
|
||
unsigned char elf_reloc_val;
|
||
};
|
||
|
||
/* An array mapping BFD reloc codes to SH ELF relocs. */
|
||
|
||
static const struct elf_reloc_map sh_reloc_map[] =
|
||
{
|
||
{ BFD_RELOC_NONE, R_SH_NONE },
|
||
{ BFD_RELOC_32, R_SH_DIR32 },
|
||
{ BFD_RELOC_CTOR, R_SH_DIR32 },
|
||
{ BFD_RELOC_32_PCREL, R_SH_REL32 },
|
||
{ BFD_RELOC_SH_PCDISP8BY2, R_SH_DIR8WPN },
|
||
{ BFD_RELOC_SH_PCDISP12BY2, R_SH_IND12W },
|
||
{ BFD_RELOC_SH_PCRELIMM8BY2, R_SH_DIR8WPZ },
|
||
{ BFD_RELOC_SH_PCRELIMM8BY4, R_SH_DIR8WPL },
|
||
{ BFD_RELOC_8_PCREL, R_SH_SWITCH8 },
|
||
{ BFD_RELOC_SH_SWITCH16, R_SH_SWITCH16 },
|
||
{ BFD_RELOC_SH_SWITCH32, R_SH_SWITCH32 },
|
||
{ BFD_RELOC_SH_USES, R_SH_USES },
|
||
{ BFD_RELOC_SH_COUNT, R_SH_COUNT },
|
||
{ BFD_RELOC_SH_ALIGN, R_SH_ALIGN },
|
||
{ BFD_RELOC_SH_CODE, R_SH_CODE },
|
||
{ BFD_RELOC_SH_DATA, R_SH_DATA },
|
||
{ BFD_RELOC_SH_LABEL, R_SH_LABEL },
|
||
{ BFD_RELOC_VTABLE_INHERIT, R_SH_GNU_VTINHERIT },
|
||
{ BFD_RELOC_VTABLE_ENTRY, R_SH_GNU_VTENTRY },
|
||
{ BFD_RELOC_SH_LOOP_START, R_SH_LOOP_START },
|
||
{ BFD_RELOC_SH_LOOP_END, R_SH_LOOP_END },
|
||
{ BFD_RELOC_32_GOT_PCREL, R_SH_GOT32 },
|
||
{ BFD_RELOC_32_PLT_PCREL, R_SH_PLT32 },
|
||
{ BFD_RELOC_SH_COPY, R_SH_COPY },
|
||
{ BFD_RELOC_SH_GLOB_DAT, R_SH_GLOB_DAT },
|
||
{ BFD_RELOC_SH_JMP_SLOT, R_SH_JMP_SLOT },
|
||
{ BFD_RELOC_SH_RELATIVE, R_SH_RELATIVE },
|
||
{ BFD_RELOC_32_GOTOFF, R_SH_GOTOFF },
|
||
{ BFD_RELOC_SH_GOTPC, R_SH_GOTPC },
|
||
};
|
||
|
||
/* Given a BFD reloc code, return the howto structure for the
|
||
corresponding SH ELf reloc. */
|
||
|
||
static reloc_howto_type *
|
||
sh_elf_reloc_type_lookup (abfd, code)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
bfd_reloc_code_real_type code;
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < sizeof (sh_reloc_map) / sizeof (struct elf_reloc_map); i++)
|
||
{
|
||
if (sh_reloc_map[i].bfd_reloc_val == code)
|
||
return &sh_elf_howto_table[(int) sh_reloc_map[i].elf_reloc_val];
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Given an ELF reloc, fill in the howto field of a relent. */
|
||
|
||
static void
|
||
sh_elf_info_to_howto (abfd, cache_ptr, dst)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
arelent *cache_ptr;
|
||
Elf_Internal_Rela *dst;
|
||
{
|
||
unsigned int r;
|
||
|
||
r = ELF32_R_TYPE (dst->r_info);
|
||
|
||
BFD_ASSERT (r < (unsigned int) R_SH_max);
|
||
BFD_ASSERT (r < R_SH_FIRST_INVALID_RELOC || r > R_SH_LAST_INVALID_RELOC);
|
||
BFD_ASSERT (r < R_SH_FIRST_INVALID_RELOC_2 || r > R_SH_LAST_INVALID_RELOC_2);
|
||
|
||
cache_ptr->howto = &sh_elf_howto_table[r];
|
||
}
|
||
|
||
/* This function handles relaxing for SH ELF. See the corresponding
|
||
function in coff-sh.c for a description of what this does. FIXME:
|
||
There is a lot of duplication here between this code and the COFF
|
||
specific code. The format of relocs and symbols is wound deeply
|
||
into this code, but it would still be better if the duplication
|
||
could be eliminated somehow. Note in particular that although both
|
||
functions use symbols like R_SH_CODE, those symbols have different
|
||
values; in coff-sh.c they come from include/coff/sh.h, whereas here
|
||
they come from enum elf_sh_reloc_type in include/elf/sh.h. */
|
||
|
||
static boolean
|
||
sh_elf_relax_section (abfd, sec, link_info, again)
|
||
bfd *abfd;
|
||
asection *sec;
|
||
struct bfd_link_info *link_info;
|
||
boolean *again;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf_Internal_Shdr *shndx_hdr;
|
||
Elf_Internal_Rela *internal_relocs;
|
||
Elf_Internal_Rela *free_relocs = NULL;
|
||
boolean have_code;
|
||
Elf_Internal_Rela *irel, *irelend;
|
||
bfd_byte *contents = NULL;
|
||
bfd_byte *free_contents = NULL;
|
||
Elf32_External_Sym *extsyms = NULL;
|
||
Elf32_External_Sym *free_extsyms = NULL;
|
||
Elf_External_Sym_Shndx *shndx_buf = NULL;
|
||
|
||
*again = false;
|
||
|
||
if (link_info->relocateable
|
||
|| (sec->flags & SEC_RELOC) == 0
|
||
|| sec->reloc_count == 0)
|
||
return true;
|
||
|
||
/* If this is the first time we have been called for this section,
|
||
initialize the cooked size. */
|
||
if (sec->_cooked_size == 0)
|
||
sec->_cooked_size = sec->_raw_size;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
|
||
|
||
internal_relocs = (_bfd_elf32_link_read_relocs
|
||
(abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
|
||
link_info->keep_memory));
|
||
if (internal_relocs == NULL)
|
||
goto error_return;
|
||
if (! link_info->keep_memory)
|
||
free_relocs = internal_relocs;
|
||
|
||
have_code = false;
|
||
|
||
irelend = internal_relocs + sec->reloc_count;
|
||
for (irel = internal_relocs; irel < irelend; irel++)
|
||
{
|
||
bfd_vma laddr, paddr, symval;
|
||
unsigned short insn;
|
||
Elf_Internal_Rela *irelfn, *irelscan, *irelcount;
|
||
bfd_signed_vma foff;
|
||
|
||
if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_CODE)
|
||
have_code = true;
|
||
|
||
if (ELF32_R_TYPE (irel->r_info) != (int) R_SH_USES)
|
||
continue;
|
||
|
||
/* Get the section contents. */
|
||
if (contents == NULL)
|
||
{
|
||
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
||
contents = elf_section_data (sec)->this_hdr.contents;
|
||
else
|
||
{
|
||
contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
|
||
if (contents == NULL)
|
||
goto error_return;
|
||
free_contents = contents;
|
||
|
||
if (! bfd_get_section_contents (abfd, sec, contents,
|
||
(file_ptr) 0, sec->_raw_size))
|
||
goto error_return;
|
||
}
|
||
}
|
||
|
||
/* The r_addend field of the R_SH_USES reloc will point us to
|
||
the register load. The 4 is because the r_addend field is
|
||
computed as though it were a jump offset, which are based
|
||
from 4 bytes after the jump instruction. */
|
||
laddr = irel->r_offset + 4 + irel->r_addend;
|
||
if (laddr >= sec->_raw_size)
|
||
{
|
||
(*_bfd_error_handler) (_("%s: 0x%lx: warning: bad R_SH_USES offset"),
|
||
bfd_archive_filename (abfd),
|
||
(unsigned long) irel->r_offset);
|
||
continue;
|
||
}
|
||
insn = bfd_get_16 (abfd, contents + laddr);
|
||
|
||
/* If the instruction is not mov.l NN,rN, we don't know what to
|
||
do. */
|
||
if ((insn & 0xf000) != 0xd000)
|
||
{
|
||
((*_bfd_error_handler)
|
||
(_("%s: 0x%lx: warning: R_SH_USES points to unrecognized insn 0x%x"),
|
||
bfd_archive_filename (abfd), (unsigned long) irel->r_offset, insn));
|
||
continue;
|
||
}
|
||
|
||
/* Get the address from which the register is being loaded. The
|
||
displacement in the mov.l instruction is quadrupled. It is a
|
||
displacement from four bytes after the movl instruction, but,
|
||
before adding in the PC address, two least significant bits
|
||
of the PC are cleared. We assume that the section is aligned
|
||
on a four byte boundary. */
|
||
paddr = insn & 0xff;
|
||
paddr *= 4;
|
||
paddr += (laddr + 4) &~ (bfd_vma) 3;
|
||
if (paddr >= sec->_raw_size)
|
||
{
|
||
((*_bfd_error_handler)
|
||
(_("%s: 0x%lx: warning: bad R_SH_USES load offset"),
|
||
bfd_archive_filename (abfd), (unsigned long) irel->r_offset));
|
||
continue;
|
||
}
|
||
|
||
/* Get the reloc for the address from which the register is
|
||
being loaded. This reloc will tell us which function is
|
||
actually being called. */
|
||
for (irelfn = internal_relocs; irelfn < irelend; irelfn++)
|
||
if (irelfn->r_offset == paddr
|
||
&& ELF32_R_TYPE (irelfn->r_info) == (int) R_SH_DIR32)
|
||
break;
|
||
if (irelfn >= irelend)
|
||
{
|
||
((*_bfd_error_handler)
|
||
(_("%s: 0x%lx: warning: could not find expected reloc"),
|
||
bfd_archive_filename (abfd), (unsigned long) paddr));
|
||
continue;
|
||
}
|
||
|
||
/* Read this BFD's symbols if we haven't done so already. */
|
||
if (extsyms == NULL)
|
||
{
|
||
if (symtab_hdr->contents != NULL)
|
||
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
|
||
else
|
||
{
|
||
bfd_size_type amt;
|
||
|
||
amt = symtab_hdr->sh_info;
|
||
amt *= sizeof (Elf32_External_Sym);
|
||
extsyms = (Elf32_External_Sym *) bfd_malloc (amt);
|
||
if (extsyms == NULL)
|
||
goto error_return;
|
||
free_extsyms = extsyms;
|
||
if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|
||
|| bfd_bread ((PTR) extsyms, amt, abfd) != amt)
|
||
goto error_return;
|
||
symtab_hdr->contents = (bfd_byte *) extsyms;
|
||
}
|
||
|
||
if (shndx_hdr->sh_size != 0)
|
||
{
|
||
bfd_size_type amt;
|
||
|
||
amt = symtab_hdr->sh_info;
|
||
amt *= sizeof (Elf_External_Sym_Shndx);
|
||
shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
|
||
if (shndx_buf == NULL)
|
||
goto error_return;
|
||
if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
|
||
|| bfd_bread ((PTR) shndx_buf, amt, abfd) != amt)
|
||
goto error_return;
|
||
shndx_hdr->contents = (bfd_byte *) shndx_buf;
|
||
}
|
||
}
|
||
|
||
/* Get the value of the symbol referred to by the reloc. */
|
||
if (ELF32_R_SYM (irelfn->r_info) < symtab_hdr->sh_info)
|
||
{
|
||
/* A local symbol. */
|
||
Elf32_External_Sym *esym;
|
||
Elf_External_Sym_Shndx *shndx;
|
||
Elf_Internal_Sym isym;
|
||
|
||
esym = extsyms + ELF32_R_SYM (irelfn->r_info);
|
||
shndx = shndx_buf + (shndx_buf ? ELF32_R_SYM (irelfn->r_info) : 0);
|
||
bfd_elf32_swap_symbol_in (abfd, esym, shndx, &isym);
|
||
|
||
if (isym.st_shndx != _bfd_elf_section_from_bfd_section (abfd, sec))
|
||
{
|
||
((*_bfd_error_handler)
|
||
(_("%s: 0x%lx: warning: symbol in unexpected section"),
|
||
bfd_archive_filename (abfd), (unsigned long) paddr));
|
||
continue;
|
||
}
|
||
|
||
symval = (isym.st_value
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
}
|
||
else
|
||
{
|
||
unsigned long indx;
|
||
struct elf_link_hash_entry *h;
|
||
|
||
indx = ELF32_R_SYM (irelfn->r_info) - symtab_hdr->sh_info;
|
||
h = elf_sym_hashes (abfd)[indx];
|
||
BFD_ASSERT (h != NULL);
|
||
if (h->root.type != bfd_link_hash_defined
|
||
&& h->root.type != bfd_link_hash_defweak)
|
||
{
|
||
/* This appears to be a reference to an undefined
|
||
symbol. Just ignore it--it will be caught by the
|
||
regular reloc processing. */
|
||
continue;
|
||
}
|
||
|
||
symval = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
}
|
||
|
||
symval += bfd_get_32 (abfd, contents + paddr);
|
||
|
||
/* See if this function call can be shortened. */
|
||
foff = (symval
|
||
- (irel->r_offset
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset
|
||
+ 4));
|
||
if (foff < -0x1000 || foff >= 0x1000)
|
||
{
|
||
/* After all that work, we can't shorten this function call. */
|
||
continue;
|
||
}
|
||
|
||
/* Shorten the function call. */
|
||
|
||
/* For simplicity of coding, we are going to modify the section
|
||
contents, the section relocs, and the BFD symbol table. We
|
||
must tell the rest of the code not to free up this
|
||
information. It would be possible to instead create a table
|
||
of changes which have to be made, as is done in coff-mips.c;
|
||
that would be more work, but would require less memory when
|
||
the linker is run. */
|
||
|
||
elf_section_data (sec)->relocs = internal_relocs;
|
||
free_relocs = NULL;
|
||
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
free_contents = NULL;
|
||
|
||
free_extsyms = NULL;
|
||
|
||
/* Replace the jsr with a bsr. */
|
||
|
||
/* Change the R_SH_USES reloc into an R_SH_IND12W reloc, and
|
||
replace the jsr with a bsr. */
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irelfn->r_info), R_SH_IND12W);
|
||
if (ELF32_R_SYM (irelfn->r_info) < symtab_hdr->sh_info)
|
||
{
|
||
/* If this needs to be changed because of future relaxing,
|
||
it will be handled here like other internal IND12W
|
||
relocs. */
|
||
bfd_put_16 (abfd,
|
||
(bfd_vma) 0xb000 | ((foff >> 1) & 0xfff),
|
||
contents + irel->r_offset);
|
||
}
|
||
else
|
||
{
|
||
/* We can't fully resolve this yet, because the external
|
||
symbol value may be changed by future relaxing. We let
|
||
the final link phase handle it. */
|
||
bfd_put_16 (abfd, (bfd_vma) 0xb000, contents + irel->r_offset);
|
||
}
|
||
|
||
/* See if there is another R_SH_USES reloc referring to the same
|
||
register load. */
|
||
for (irelscan = internal_relocs; irelscan < irelend; irelscan++)
|
||
if (ELF32_R_TYPE (irelscan->r_info) == (int) R_SH_USES
|
||
&& laddr == irelscan->r_offset + 4 + irelscan->r_addend)
|
||
break;
|
||
if (irelscan < irelend)
|
||
{
|
||
/* Some other function call depends upon this register load,
|
||
and we have not yet converted that function call.
|
||
Indeed, we may never be able to convert it. There is
|
||
nothing else we can do at this point. */
|
||
continue;
|
||
}
|
||
|
||
/* Look for a R_SH_COUNT reloc on the location where the
|
||
function address is stored. Do this before deleting any
|
||
bytes, to avoid confusion about the address. */
|
||
for (irelcount = internal_relocs; irelcount < irelend; irelcount++)
|
||
if (irelcount->r_offset == paddr
|
||
&& ELF32_R_TYPE (irelcount->r_info) == (int) R_SH_COUNT)
|
||
break;
|
||
|
||
/* Delete the register load. */
|
||
if (! sh_elf_relax_delete_bytes (abfd, sec, laddr, 2))
|
||
goto error_return;
|
||
|
||
/* That will change things, so, just in case it permits some
|
||
other function call to come within range, we should relax
|
||
again. Note that this is not required, and it may be slow. */
|
||
*again = true;
|
||
|
||
/* Now check whether we got a COUNT reloc. */
|
||
if (irelcount >= irelend)
|
||
{
|
||
((*_bfd_error_handler)
|
||
(_("%s: 0x%lx: warning: could not find expected COUNT reloc"),
|
||
bfd_archive_filename (abfd), (unsigned long) paddr));
|
||
continue;
|
||
}
|
||
|
||
/* The number of uses is stored in the r_addend field. We've
|
||
just deleted one. */
|
||
if (irelcount->r_addend == 0)
|
||
{
|
||
((*_bfd_error_handler) (_("%s: 0x%lx: warning: bad count"),
|
||
bfd_archive_filename (abfd),
|
||
(unsigned long) paddr));
|
||
continue;
|
||
}
|
||
|
||
--irelcount->r_addend;
|
||
|
||
/* If there are no more uses, we can delete the address. Reload
|
||
the address from irelfn, in case it was changed by the
|
||
previous call to sh_elf_relax_delete_bytes. */
|
||
if (irelcount->r_addend == 0)
|
||
{
|
||
if (! sh_elf_relax_delete_bytes (abfd, sec, irelfn->r_offset, 4))
|
||
goto error_return;
|
||
}
|
||
|
||
/* We've done all we can with that function call. */
|
||
}
|
||
|
||
/* Look for load and store instructions that we can align on four
|
||
byte boundaries. */
|
||
if (have_code)
|
||
{
|
||
boolean swapped;
|
||
|
||
/* Get the section contents. */
|
||
if (contents == NULL)
|
||
{
|
||
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
||
contents = elf_section_data (sec)->this_hdr.contents;
|
||
else
|
||
{
|
||
contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
|
||
if (contents == NULL)
|
||
goto error_return;
|
||
free_contents = contents;
|
||
|
||
if (! bfd_get_section_contents (abfd, sec, contents,
|
||
(file_ptr) 0, sec->_raw_size))
|
||
goto error_return;
|
||
}
|
||
}
|
||
|
||
if (! sh_elf_align_loads (abfd, sec, internal_relocs, contents,
|
||
&swapped))
|
||
goto error_return;
|
||
|
||
if (swapped)
|
||
{
|
||
elf_section_data (sec)->relocs = internal_relocs;
|
||
free_relocs = NULL;
|
||
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
free_contents = NULL;
|
||
|
||
free_extsyms = NULL;
|
||
}
|
||
}
|
||
|
||
if (free_relocs != NULL)
|
||
free (free_relocs);
|
||
|
||
if (free_contents != NULL)
|
||
{
|
||
if (! link_info->keep_memory)
|
||
free (free_contents);
|
||
else
|
||
{
|
||
/* Cache the section contents for elf_link_input_bfd. */
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
}
|
||
}
|
||
|
||
if (shndx_buf != NULL)
|
||
{
|
||
shndx_hdr->contents = NULL;
|
||
free (shndx_buf);
|
||
}
|
||
|
||
if (free_extsyms != NULL)
|
||
{
|
||
if (! link_info->keep_memory)
|
||
{
|
||
symtab_hdr->contents = NULL;
|
||
free (free_extsyms);
|
||
}
|
||
}
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
if (free_relocs != NULL)
|
||
free (free_relocs);
|
||
if (free_contents != NULL)
|
||
free (free_contents);
|
||
if (shndx_buf != NULL)
|
||
{
|
||
shndx_hdr->contents = NULL;
|
||
free (shndx_buf);
|
||
}
|
||
if (free_extsyms != NULL)
|
||
{
|
||
symtab_hdr->contents = NULL;
|
||
free (free_extsyms);
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
/* Delete some bytes from a section while relaxing. FIXME: There is a
|
||
lot of duplication between this function and sh_relax_delete_bytes
|
||
in coff-sh.c. */
|
||
|
||
static boolean
|
||
sh_elf_relax_delete_bytes (abfd, sec, addr, count)
|
||
bfd *abfd;
|
||
asection *sec;
|
||
bfd_vma addr;
|
||
int count;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf_Internal_Shdr *shndx_hdr;
|
||
Elf32_External_Sym *extsyms;
|
||
unsigned int sec_shndx;
|
||
bfd_byte *contents;
|
||
Elf_Internal_Rela *irel, *irelend;
|
||
Elf_Internal_Rela *irelalign;
|
||
bfd_vma toaddr;
|
||
Elf32_External_Sym *esym, *esymend;
|
||
Elf_External_Sym_Shndx *shndx_buf, *shndx;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
struct elf_link_hash_entry **end_hashes;
|
||
unsigned int symcount;
|
||
asection *o;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
|
||
|
||
shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
|
||
shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents;
|
||
|
||
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
||
|
||
contents = elf_section_data (sec)->this_hdr.contents;
|
||
|
||
/* The deletion must stop at the next ALIGN reloc for an aligment
|
||
power larger than the number of bytes we are deleting. */
|
||
|
||
irelalign = NULL;
|
||
toaddr = sec->_cooked_size;
|
||
|
||
irel = elf_section_data (sec)->relocs;
|
||
irelend = irel + sec->reloc_count;
|
||
for (; irel < irelend; irel++)
|
||
{
|
||
if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_ALIGN
|
||
&& irel->r_offset > addr
|
||
&& count < (1 << irel->r_addend))
|
||
{
|
||
irelalign = irel;
|
||
toaddr = irel->r_offset;
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Actually delete the bytes. */
|
||
memmove (contents + addr, contents + addr + count,
|
||
(size_t) (toaddr - addr - count));
|
||
if (irelalign == NULL)
|
||
sec->_cooked_size -= count;
|
||
else
|
||
{
|
||
int i;
|
||
|
||
#define NOP_OPCODE (0x0009)
|
||
|
||
BFD_ASSERT ((count & 1) == 0);
|
||
for (i = 0; i < count; i += 2)
|
||
bfd_put_16 (abfd, (bfd_vma) NOP_OPCODE, contents + toaddr - count + i);
|
||
}
|
||
|
||
/* Adjust all the relocs. */
|
||
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
||
{
|
||
bfd_vma nraddr, stop;
|
||
bfd_vma start = 0;
|
||
int insn = 0;
|
||
Elf_Internal_Sym sym;
|
||
int off, adjust, oinsn;
|
||
bfd_signed_vma voff = 0;
|
||
boolean overflow;
|
||
|
||
/* Get the new reloc address. */
|
||
nraddr = irel->r_offset;
|
||
if ((irel->r_offset > addr
|
||
&& irel->r_offset < toaddr)
|
||
|| (ELF32_R_TYPE (irel->r_info) == (int) R_SH_ALIGN
|
||
&& irel->r_offset == toaddr))
|
||
nraddr -= count;
|
||
|
||
/* See if this reloc was for the bytes we have deleted, in which
|
||
case we no longer care about it. Don't delete relocs which
|
||
represent addresses, though. */
|
||
if (irel->r_offset >= addr
|
||
&& irel->r_offset < addr + count
|
||
&& ELF32_R_TYPE (irel->r_info) != (int) R_SH_ALIGN
|
||
&& ELF32_R_TYPE (irel->r_info) != (int) R_SH_CODE
|
||
&& ELF32_R_TYPE (irel->r_info) != (int) R_SH_DATA
|
||
&& ELF32_R_TYPE (irel->r_info) != (int) R_SH_LABEL)
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
(int) R_SH_NONE);
|
||
|
||
/* If this is a PC relative reloc, see if the range it covers
|
||
includes the bytes we have deleted. */
|
||
switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info))
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case R_SH_DIR8WPN:
|
||
case R_SH_IND12W:
|
||
case R_SH_DIR8WPZ:
|
||
case R_SH_DIR8WPL:
|
||
start = irel->r_offset;
|
||
insn = bfd_get_16 (abfd, contents + nraddr);
|
||
break;
|
||
}
|
||
|
||
switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info))
|
||
{
|
||
default:
|
||
start = stop = addr;
|
||
break;
|
||
|
||
case R_SH_DIR32:
|
||
/* If this reloc is against a symbol defined in this
|
||
section, and the symbol will not be adjusted below, we
|
||
must check the addend to see it will put the value in
|
||
range to be adjusted, and hence must be changed. */
|
||
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
||
{
|
||
esym = extsyms + ELF32_R_SYM (irel->r_info);
|
||
shndx = shndx_buf + (shndx_buf ? ELF32_R_SYM (irel->r_info) : 0);
|
||
bfd_elf32_swap_symbol_in (abfd, esym, shndx, &sym);
|
||
|
||
if (sym.st_shndx == sec_shndx
|
||
&& (sym.st_value <= addr
|
||
|| sym.st_value >= toaddr))
|
||
{
|
||
bfd_vma val;
|
||
|
||
val = bfd_get_32 (abfd, contents + nraddr);
|
||
val += sym.st_value;
|
||
if (val > addr && val < toaddr)
|
||
bfd_put_32 (abfd, val - count, contents + nraddr);
|
||
}
|
||
}
|
||
start = stop = addr;
|
||
break;
|
||
|
||
case R_SH_DIR8WPN:
|
||
off = insn & 0xff;
|
||
if (off & 0x80)
|
||
off -= 0x100;
|
||
stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2);
|
||
break;
|
||
|
||
case R_SH_IND12W:
|
||
if (ELF32_R_SYM (irel->r_info) >= symtab_hdr->sh_info)
|
||
start = stop = addr;
|
||
else
|
||
{
|
||
off = insn & 0xfff;
|
||
if (off & 0x800)
|
||
off -= 0x1000;
|
||
stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2);
|
||
}
|
||
break;
|
||
|
||
case R_SH_DIR8WPZ:
|
||
off = insn & 0xff;
|
||
stop = start + 4 + off * 2;
|
||
break;
|
||
|
||
case R_SH_DIR8WPL:
|
||
off = insn & 0xff;
|
||
stop = (start & ~(bfd_vma) 3) + 4 + off * 4;
|
||
break;
|
||
|
||
case R_SH_SWITCH8:
|
||
case R_SH_SWITCH16:
|
||
case R_SH_SWITCH32:
|
||
/* These relocs types represent
|
||
.word L2-L1
|
||
The r_addend field holds the difference between the reloc
|
||
address and L1. That is the start of the reloc, and
|
||
adding in the contents gives us the top. We must adjust
|
||
both the r_offset field and the section contents.
|
||
N.B. in gas / coff bfd, the elf bfd r_addend is called r_offset,
|
||
and the elf bfd r_offset is called r_vaddr. */
|
||
|
||
stop = irel->r_offset;
|
||
start = (bfd_vma) ((bfd_signed_vma) stop - (long) irel->r_addend);
|
||
|
||
if (start > addr
|
||
&& start < toaddr
|
||
&& (stop <= addr || stop >= toaddr))
|
||
irel->r_addend += count;
|
||
else if (stop > addr
|
||
&& stop < toaddr
|
||
&& (start <= addr || start >= toaddr))
|
||
irel->r_addend -= count;
|
||
|
||
if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_SWITCH16)
|
||
voff = bfd_get_signed_16 (abfd, contents + nraddr);
|
||
else if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_SWITCH8)
|
||
voff = bfd_get_8 (abfd, contents + nraddr);
|
||
else
|
||
voff = bfd_get_signed_32 (abfd, contents + nraddr);
|
||
stop = (bfd_vma) ((bfd_signed_vma) start + voff);
|
||
|
||
break;
|
||
|
||
case R_SH_USES:
|
||
start = irel->r_offset;
|
||
stop = (bfd_vma) ((bfd_signed_vma) start
|
||
+ (long) irel->r_addend
|
||
+ 4);
|
||
break;
|
||
}
|
||
|
||
if (start > addr
|
||
&& start < toaddr
|
||
&& (stop <= addr || stop >= toaddr))
|
||
adjust = count;
|
||
else if (stop > addr
|
||
&& stop < toaddr
|
||
&& (start <= addr || start >= toaddr))
|
||
adjust = - count;
|
||
else
|
||
adjust = 0;
|
||
|
||
if (adjust != 0)
|
||
{
|
||
oinsn = insn;
|
||
overflow = false;
|
||
switch ((enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info))
|
||
{
|
||
default:
|
||
abort ();
|
||
break;
|
||
|
||
case R_SH_DIR8WPN:
|
||
case R_SH_DIR8WPZ:
|
||
insn += adjust / 2;
|
||
if ((oinsn & 0xff00) != (insn & 0xff00))
|
||
overflow = true;
|
||
bfd_put_16 (abfd, (bfd_vma) insn, contents + nraddr);
|
||
break;
|
||
|
||
case R_SH_IND12W:
|
||
insn += adjust / 2;
|
||
if ((oinsn & 0xf000) != (insn & 0xf000))
|
||
overflow = true;
|
||
bfd_put_16 (abfd, (bfd_vma) insn, contents + nraddr);
|
||
break;
|
||
|
||
case R_SH_DIR8WPL:
|
||
BFD_ASSERT (adjust == count || count >= 4);
|
||
if (count >= 4)
|
||
insn += adjust / 4;
|
||
else
|
||
{
|
||
if ((irel->r_offset & 3) == 0)
|
||
++insn;
|
||
}
|
||
if ((oinsn & 0xff00) != (insn & 0xff00))
|
||
overflow = true;
|
||
bfd_put_16 (abfd, (bfd_vma) insn, contents + nraddr);
|
||
break;
|
||
|
||
case R_SH_SWITCH8:
|
||
voff += adjust;
|
||
if (voff < 0 || voff >= 0xff)
|
||
overflow = true;
|
||
bfd_put_8 (abfd, voff, contents + nraddr);
|
||
break;
|
||
|
||
case R_SH_SWITCH16:
|
||
voff += adjust;
|
||
if (voff < - 0x8000 || voff >= 0x8000)
|
||
overflow = true;
|
||
bfd_put_signed_16 (abfd, (bfd_vma) voff, contents + nraddr);
|
||
break;
|
||
|
||
case R_SH_SWITCH32:
|
||
voff += adjust;
|
||
bfd_put_signed_32 (abfd, (bfd_vma) voff, contents + nraddr);
|
||
break;
|
||
|
||
case R_SH_USES:
|
||
irel->r_addend += adjust;
|
||
break;
|
||
}
|
||
|
||
if (overflow)
|
||
{
|
||
((*_bfd_error_handler)
|
||
(_("%s: 0x%lx: fatal: reloc overflow while relaxing"),
|
||
bfd_archive_filename (abfd), (unsigned long) irel->r_offset));
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
}
|
||
|
||
irel->r_offset = nraddr;
|
||
}
|
||
|
||
/* Look through all the other sections. If there contain any IMM32
|
||
relocs against internal symbols which we are not going to adjust
|
||
below, we may need to adjust the addends. */
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
{
|
||
Elf_Internal_Rela *internal_relocs;
|
||
Elf_Internal_Rela *irelscan, *irelscanend;
|
||
bfd_byte *ocontents;
|
||
|
||
if (o == sec
|
||
|| (o->flags & SEC_RELOC) == 0
|
||
|| o->reloc_count == 0)
|
||
continue;
|
||
|
||
/* We always cache the relocs. Perhaps, if info->keep_memory is
|
||
false, we should free them, if we are permitted to, when we
|
||
leave sh_coff_relax_section. */
|
||
internal_relocs = (_bfd_elf32_link_read_relocs
|
||
(abfd, o, (PTR) NULL, (Elf_Internal_Rela *) NULL,
|
||
true));
|
||
if (internal_relocs == NULL)
|
||
return false;
|
||
|
||
ocontents = NULL;
|
||
irelscanend = internal_relocs + o->reloc_count;
|
||
for (irelscan = internal_relocs; irelscan < irelscanend; irelscan++)
|
||
{
|
||
Elf_Internal_Sym sym;
|
||
|
||
/* Dwarf line numbers use R_SH_SWITCH32 relocs. */
|
||
if (ELF32_R_TYPE (irelscan->r_info) == (int) R_SH_SWITCH32)
|
||
{
|
||
bfd_vma start, stop;
|
||
bfd_signed_vma voff;
|
||
|
||
if (ocontents == NULL)
|
||
{
|
||
if (elf_section_data (o)->this_hdr.contents != NULL)
|
||
ocontents = elf_section_data (o)->this_hdr.contents;
|
||
else
|
||
{
|
||
/* We always cache the section contents.
|
||
Perhaps, if info->keep_memory is false, we
|
||
should free them, if we are permitted to,
|
||
when we leave sh_coff_relax_section. */
|
||
ocontents = (bfd_byte *) bfd_malloc (o->_raw_size);
|
||
if (ocontents == NULL)
|
||
return false;
|
||
if (! bfd_get_section_contents (abfd, o, ocontents,
|
||
(file_ptr) 0,
|
||
o->_raw_size))
|
||
return false;
|
||
elf_section_data (o)->this_hdr.contents = ocontents;
|
||
}
|
||
}
|
||
|
||
stop = irelscan->r_offset;
|
||
start
|
||
= (bfd_vma) ((bfd_signed_vma) stop - (long) irelscan->r_addend);
|
||
|
||
/* STOP is in a different section, so it won't change. */
|
||
if (start > addr && start < toaddr)
|
||
irelscan->r_addend += count;
|
||
|
||
voff = bfd_get_signed_32 (abfd, ocontents + irelscan->r_offset);
|
||
stop = (bfd_vma) ((bfd_signed_vma) start + voff);
|
||
|
||
if (start > addr
|
||
&& start < toaddr
|
||
&& (stop <= addr || stop >= toaddr))
|
||
bfd_put_signed_32 (abfd, (bfd_vma) voff + count,
|
||
ocontents + irelscan->r_offset);
|
||
else if (stop > addr
|
||
&& stop < toaddr
|
||
&& (start <= addr || start >= toaddr))
|
||
bfd_put_signed_32 (abfd, (bfd_vma) voff - count,
|
||
ocontents + irelscan->r_offset);
|
||
}
|
||
|
||
if (ELF32_R_TYPE (irelscan->r_info) != (int) R_SH_DIR32)
|
||
continue;
|
||
|
||
if (ELF32_R_SYM (irelscan->r_info) >= symtab_hdr->sh_info)
|
||
continue;
|
||
|
||
|
||
esym = extsyms + ELF32_R_SYM (irelscan->r_info);
|
||
shndx = shndx_buf + (shndx_buf ? ELF32_R_SYM (irelscan->r_info) : 0);
|
||
bfd_elf32_swap_symbol_in (abfd, esym, shndx, &sym);
|
||
|
||
if (sym.st_shndx == sec_shndx
|
||
&& (sym.st_value <= addr
|
||
|| sym.st_value >= toaddr))
|
||
{
|
||
bfd_vma val;
|
||
|
||
if (ocontents == NULL)
|
||
{
|
||
if (elf_section_data (o)->this_hdr.contents != NULL)
|
||
ocontents = elf_section_data (o)->this_hdr.contents;
|
||
else
|
||
{
|
||
/* We always cache the section contents.
|
||
Perhaps, if info->keep_memory is false, we
|
||
should free them, if we are permitted to,
|
||
when we leave sh_coff_relax_section. */
|
||
ocontents = (bfd_byte *) bfd_malloc (o->_raw_size);
|
||
if (ocontents == NULL)
|
||
return false;
|
||
if (! bfd_get_section_contents (abfd, o, ocontents,
|
||
(file_ptr) 0,
|
||
o->_raw_size))
|
||
return false;
|
||
elf_section_data (o)->this_hdr.contents = ocontents;
|
||
}
|
||
}
|
||
|
||
val = bfd_get_32 (abfd, ocontents + irelscan->r_offset);
|
||
val += sym.st_value;
|
||
if (val > addr && val < toaddr)
|
||
bfd_put_32 (abfd, val - count,
|
||
ocontents + irelscan->r_offset);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Adjust the local symbols defined in this section. */
|
||
shndx = shndx_buf;
|
||
esym = extsyms;
|
||
esymend = esym + symtab_hdr->sh_info;
|
||
for (; esym < esymend; esym++, shndx = (shndx ? shndx + 1 : NULL))
|
||
{
|
||
Elf_Internal_Sym isym;
|
||
Elf_External_Sym_Shndx dummy;
|
||
|
||
bfd_elf32_swap_symbol_in (abfd, esym, shndx, &isym);
|
||
|
||
if (isym.st_shndx == sec_shndx
|
||
&& isym.st_value > addr
|
||
&& isym.st_value < toaddr)
|
||
{
|
||
isym.st_value -= count;
|
||
bfd_elf32_swap_symbol_out (abfd, &isym, (PTR) esym, (PTR) &dummy);
|
||
}
|
||
}
|
||
|
||
/* Now adjust the global symbols defined in this section. */
|
||
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
||
- symtab_hdr->sh_info);
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
end_hashes = sym_hashes + symcount;
|
||
for (; sym_hashes < end_hashes; sym_hashes++)
|
||
{
|
||
struct elf_link_hash_entry *sym_hash = *sym_hashes;
|
||
if ((sym_hash->root.type == bfd_link_hash_defined
|
||
|| sym_hash->root.type == bfd_link_hash_defweak)
|
||
&& sym_hash->root.u.def.section == sec
|
||
&& sym_hash->root.u.def.value > addr
|
||
&& sym_hash->root.u.def.value < toaddr)
|
||
{
|
||
sym_hash->root.u.def.value -= count;
|
||
}
|
||
}
|
||
|
||
/* See if we can move the ALIGN reloc forward. We have adjusted
|
||
r_offset for it already. */
|
||
if (irelalign != NULL)
|
||
{
|
||
bfd_vma alignto, alignaddr;
|
||
|
||
alignto = BFD_ALIGN (toaddr, 1 << irelalign->r_addend);
|
||
alignaddr = BFD_ALIGN (irelalign->r_offset,
|
||
1 << irelalign->r_addend);
|
||
if (alignto != alignaddr)
|
||
{
|
||
/* Tail recursion. */
|
||
return sh_elf_relax_delete_bytes (abfd, sec, alignaddr,
|
||
(int) (alignto - alignaddr));
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Look for loads and stores which we can align to four byte
|
||
boundaries. This is like sh_align_loads in coff-sh.c. */
|
||
|
||
static boolean
|
||
sh_elf_align_loads (abfd, sec, internal_relocs, contents, pswapped)
|
||
bfd *abfd;
|
||
asection *sec;
|
||
Elf_Internal_Rela *internal_relocs;
|
||
bfd_byte *contents;
|
||
boolean *pswapped;
|
||
{
|
||
Elf_Internal_Rela *irel, *irelend;
|
||
bfd_vma *labels = NULL;
|
||
bfd_vma *label, *label_end;
|
||
bfd_size_type amt;
|
||
|
||
*pswapped = false;
|
||
|
||
irelend = internal_relocs + sec->reloc_count;
|
||
|
||
/* Get all the addresses with labels on them. */
|
||
amt = sec->reloc_count;
|
||
amt *= sizeof (bfd_vma);
|
||
labels = (bfd_vma *) bfd_malloc (amt);
|
||
if (labels == NULL)
|
||
goto error_return;
|
||
label_end = labels;
|
||
for (irel = internal_relocs; irel < irelend; irel++)
|
||
{
|
||
if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_LABEL)
|
||
{
|
||
*label_end = irel->r_offset;
|
||
++label_end;
|
||
}
|
||
}
|
||
|
||
/* Note that the assembler currently always outputs relocs in
|
||
address order. If that ever changes, this code will need to sort
|
||
the label values and the relocs. */
|
||
|
||
label = labels;
|
||
|
||
for (irel = internal_relocs; irel < irelend; irel++)
|
||
{
|
||
bfd_vma start, stop;
|
||
|
||
if (ELF32_R_TYPE (irel->r_info) != (int) R_SH_CODE)
|
||
continue;
|
||
|
||
start = irel->r_offset;
|
||
|
||
for (irel++; irel < irelend; irel++)
|
||
if (ELF32_R_TYPE (irel->r_info) == (int) R_SH_DATA)
|
||
break;
|
||
if (irel < irelend)
|
||
stop = irel->r_offset;
|
||
else
|
||
stop = sec->_cooked_size;
|
||
|
||
if (! _bfd_sh_align_load_span (abfd, sec, contents, sh_elf_swap_insns,
|
||
(PTR) internal_relocs, &label,
|
||
label_end, start, stop, pswapped))
|
||
goto error_return;
|
||
}
|
||
|
||
free (labels);
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
if (labels != NULL)
|
||
free (labels);
|
||
return false;
|
||
}
|
||
|
||
/* Swap two SH instructions. This is like sh_swap_insns in coff-sh.c. */
|
||
|
||
static boolean
|
||
sh_elf_swap_insns (abfd, sec, relocs, contents, addr)
|
||
bfd *abfd;
|
||
asection *sec;
|
||
PTR relocs;
|
||
bfd_byte *contents;
|
||
bfd_vma addr;
|
||
{
|
||
Elf_Internal_Rela *internal_relocs = (Elf_Internal_Rela *) relocs;
|
||
unsigned short i1, i2;
|
||
Elf_Internal_Rela *irel, *irelend;
|
||
|
||
/* Swap the instructions themselves. */
|
||
i1 = bfd_get_16 (abfd, contents + addr);
|
||
i2 = bfd_get_16 (abfd, contents + addr + 2);
|
||
bfd_put_16 (abfd, (bfd_vma) i2, contents + addr);
|
||
bfd_put_16 (abfd, (bfd_vma) i1, contents + addr + 2);
|
||
|
||
/* Adjust all reloc addresses. */
|
||
irelend = internal_relocs + sec->reloc_count;
|
||
for (irel = internal_relocs; irel < irelend; irel++)
|
||
{
|
||
enum elf_sh_reloc_type type;
|
||
int add;
|
||
|
||
/* There are a few special types of relocs that we don't want to
|
||
adjust. These relocs do not apply to the instruction itself,
|
||
but are only associated with the address. */
|
||
type = (enum elf_sh_reloc_type) ELF32_R_TYPE (irel->r_info);
|
||
if (type == R_SH_ALIGN
|
||
|| type == R_SH_CODE
|
||
|| type == R_SH_DATA
|
||
|| type == R_SH_LABEL)
|
||
continue;
|
||
|
||
/* If an R_SH_USES reloc points to one of the addresses being
|
||
swapped, we must adjust it. It would be incorrect to do this
|
||
for a jump, though, since we want to execute both
|
||
instructions after the jump. (We have avoided swapping
|
||
around a label, so the jump will not wind up executing an
|
||
instruction it shouldn't). */
|
||
if (type == R_SH_USES)
|
||
{
|
||
bfd_vma off;
|
||
|
||
off = irel->r_offset + 4 + irel->r_addend;
|
||
if (off == addr)
|
||
irel->r_offset += 2;
|
||
else if (off == addr + 2)
|
||
irel->r_offset -= 2;
|
||
}
|
||
|
||
if (irel->r_offset == addr)
|
||
{
|
||
irel->r_offset += 2;
|
||
add = -2;
|
||
}
|
||
else if (irel->r_offset == addr + 2)
|
||
{
|
||
irel->r_offset -= 2;
|
||
add = 2;
|
||
}
|
||
else
|
||
add = 0;
|
||
|
||
if (add != 0)
|
||
{
|
||
bfd_byte *loc;
|
||
unsigned short insn, oinsn;
|
||
boolean overflow;
|
||
|
||
loc = contents + irel->r_offset;
|
||
overflow = false;
|
||
switch (type)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case R_SH_DIR8WPN:
|
||
case R_SH_DIR8WPZ:
|
||
insn = bfd_get_16 (abfd, loc);
|
||
oinsn = insn;
|
||
insn += add / 2;
|
||
if ((oinsn & 0xff00) != (insn & 0xff00))
|
||
overflow = true;
|
||
bfd_put_16 (abfd, (bfd_vma) insn, loc);
|
||
break;
|
||
|
||
case R_SH_IND12W:
|
||
insn = bfd_get_16 (abfd, loc);
|
||
oinsn = insn;
|
||
insn += add / 2;
|
||
if ((oinsn & 0xf000) != (insn & 0xf000))
|
||
overflow = true;
|
||
bfd_put_16 (abfd, (bfd_vma) insn, loc);
|
||
break;
|
||
|
||
case R_SH_DIR8WPL:
|
||
/* This reloc ignores the least significant 3 bits of
|
||
the program counter before adding in the offset.
|
||
This means that if ADDR is at an even address, the
|
||
swap will not affect the offset. If ADDR is an at an
|
||
odd address, then the instruction will be crossing a
|
||
four byte boundary, and must be adjusted. */
|
||
if ((addr & 3) != 0)
|
||
{
|
||
insn = bfd_get_16 (abfd, loc);
|
||
oinsn = insn;
|
||
insn += add / 2;
|
||
if ((oinsn & 0xff00) != (insn & 0xff00))
|
||
overflow = true;
|
||
bfd_put_16 (abfd, (bfd_vma) insn, loc);
|
||
}
|
||
|
||
break;
|
||
}
|
||
|
||
if (overflow)
|
||
{
|
||
((*_bfd_error_handler)
|
||
(_("%s: 0x%lx: fatal: reloc overflow while relaxing"),
|
||
bfd_archive_filename (abfd), (unsigned long) irel->r_offset));
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* The size in bytes of an entry in the procedure linkage table. */
|
||
|
||
#define PLT_ENTRY_SIZE 28
|
||
|
||
/* First entry in an absolute procedure linkage table look like this. */
|
||
|
||
#if 1
|
||
/* Note - this code has been "optimised" not to use r2. r2 is used by
|
||
GCC to return the address of large strutcures, so it should not be
|
||
corrupted here. This does mean however, that this PLT does not conform
|
||
to the SH PIC ABI. That spec says that r0 contains the type of the PLT
|
||
and r2 contains the GOT id. This version stores the GOT id in r0 and
|
||
ignores the type. Loaders can easily detect this difference however,
|
||
since the type will always be 0 or 8, and the GOT ids will always be
|
||
greater than or equal to 12. */
|
||
static const bfd_byte elf_sh_plt0_entry_be[PLT_ENTRY_SIZE] =
|
||
{
|
||
0xd0, 0x05, /* mov.l 2f,r0 */
|
||
0x60, 0x02, /* mov.l @r0,r0 */
|
||
0x2f, 0x06, /* mov.l r0,@-r15 */
|
||
0xd0, 0x03, /* mov.l 1f,r0 */
|
||
0x60, 0x02, /* mov.l @r0,r0 */
|
||
0x40, 0x2b, /* jmp @r0 */
|
||
0x60, 0xf6, /* mov.l @r15+,r0 */
|
||
0x00, 0x09, /* nop */
|
||
0x00, 0x09, /* nop */
|
||
0x00, 0x09, /* nop */
|
||
0, 0, 0, 0, /* 1: replaced with address of .got.plt + 8. */
|
||
0, 0, 0, 0, /* 2: replaced with address of .got.plt + 4. */
|
||
};
|
||
|
||
static const bfd_byte elf_sh_plt0_entry_le[PLT_ENTRY_SIZE] =
|
||
{
|
||
0x05, 0xd0, /* mov.l 2f,r0 */
|
||
0x02, 0x60, /* mov.l @r0,r0 */
|
||
0x06, 0x2f, /* mov.l r0,@-r15 */
|
||
0x03, 0xd0, /* mov.l 1f,r0 */
|
||
0x02, 0x60, /* mov.l @r0,r0 */
|
||
0x2b, 0x40, /* jmp @r0 */
|
||
0xf6, 0x60, /* mov.l @r15+,r0 */
|
||
0x09, 0x00, /* nop */
|
||
0x09, 0x00, /* nop */
|
||
0x09, 0x00, /* nop */
|
||
0, 0, 0, 0, /* 1: replaced with address of .got.plt + 8. */
|
||
0, 0, 0, 0, /* 2: replaced with address of .got.plt + 4. */
|
||
};
|
||
|
||
/* Sebsequent entries in an absolute procedure linkage table look like
|
||
this. */
|
||
|
||
static const bfd_byte elf_sh_plt_entry_be[PLT_ENTRY_SIZE] =
|
||
{
|
||
0xd0, 0x04, /* mov.l 1f,r0 */
|
||
0x60, 0x02, /* mov.l @r0,r0 */
|
||
0xd1, 0x02, /* mov.l 0f,r1 */
|
||
0x40, 0x2b, /* jmp @r0 */
|
||
0x60, 0x13, /* mov r1,r0 */
|
||
0xd1, 0x03, /* mov.l 2f,r1 */
|
||
0x40, 0x2b, /* jmp @r0 */
|
||
0x00, 0x09, /* nop */
|
||
0, 0, 0, 0, /* 0: replaced with address of .PLT0. */
|
||
0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
|
||
0, 0, 0, 0, /* 2: replaced with offset into relocation table. */
|
||
};
|
||
|
||
static const bfd_byte elf_sh_plt_entry_le[PLT_ENTRY_SIZE] =
|
||
{
|
||
0x04, 0xd0, /* mov.l 1f,r0 */
|
||
0x02, 0x60, /* mov.l @r0,r0 */
|
||
0x02, 0xd1, /* mov.l 0f,r1 */
|
||
0x2b, 0x40, /* jmp @r0 */
|
||
0x13, 0x60, /* mov r1,r0 */
|
||
0x03, 0xd1, /* mov.l 2f,r1 */
|
||
0x2b, 0x40, /* jmp @r0 */
|
||
0x09, 0x00, /* nop */
|
||
0, 0, 0, 0, /* 0: replaced with address of .PLT0. */
|
||
0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
|
||
0, 0, 0, 0, /* 2: replaced with offset into relocation table. */
|
||
};
|
||
|
||
/* Entries in a PIC procedure linkage table look like this. */
|
||
|
||
static const bfd_byte elf_sh_pic_plt_entry_be[PLT_ENTRY_SIZE] =
|
||
{
|
||
0xd0, 0x04, /* mov.l 1f,r0 */
|
||
0x00, 0xce, /* mov.l @(r0,r12),r0 */
|
||
0x40, 0x2b, /* jmp @r0 */
|
||
0x00, 0x09, /* nop */
|
||
0x50, 0xc2, /* mov.l @(8,r12),r0 */
|
||
0xd1, 0x03, /* mov.l 2f,r1 */
|
||
0x40, 0x2b, /* jmp @r0 */
|
||
0x50, 0xc1, /* mov.l @(4,r12),r0 */
|
||
0x00, 0x09, /* nop */
|
||
0x00, 0x09, /* nop */
|
||
0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
|
||
0, 0, 0, 0 /* 2: replaced with offset into relocation table. */
|
||
};
|
||
|
||
static const bfd_byte elf_sh_pic_plt_entry_le[PLT_ENTRY_SIZE] =
|
||
{
|
||
0x04, 0xd0, /* mov.l 1f,r0 */
|
||
0xce, 0x00, /* mov.l @(r0,r12),r0 */
|
||
0x2b, 0x40, /* jmp @r0 */
|
||
0x09, 0x00, /* nop */
|
||
0xc2, 0x50, /* mov.l @(8,r12),r0 */
|
||
0x03, 0xd1, /* mov.l 2f,r1 */
|
||
0x2b, 0x40, /* jmp @r0 */
|
||
0xc1, 0x50, /* mov.l @(4,r12),r0 */
|
||
0x09, 0x00, /* nop */
|
||
0x09, 0x00, /* nop */
|
||
0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
|
||
0, 0, 0, 0 /* 2: replaced with offset into relocation table. */
|
||
};
|
||
|
||
#else /* These are the old style PLT entries. */
|
||
static const bfd_byte elf_sh_plt0_entry_be[PLT_ENTRY_SIZE] =
|
||
{
|
||
0xd0, 0x04, /* mov.l 1f,r0 */
|
||
0xd2, 0x05, /* mov.l 2f,r2 */
|
||
0x60, 0x02, /* mov.l @r0,r0 */
|
||
0x62, 0x22, /* mov.l @r2,r2 */
|
||
0x40, 0x2b, /* jmp @r0 */
|
||
0xe0, 0x00, /* mov #0,r0 */
|
||
0x00, 0x09, /* nop */
|
||
0x00, 0x09, /* nop */
|
||
0x00, 0x09, /* nop */
|
||
0x00, 0x09, /* nop */
|
||
0, 0, 0, 0, /* 1: replaced with address of .got.plt + 8. */
|
||
0, 0, 0, 0, /* 2: replaced with address of .got.plt + 4. */
|
||
};
|
||
|
||
static const bfd_byte elf_sh_plt0_entry_le[PLT_ENTRY_SIZE] =
|
||
{
|
||
0x04, 0xd0, /* mov.l 1f,r0 */
|
||
0x05, 0xd2, /* mov.l 2f,r2 */
|
||
0x02, 0x60, /* mov.l @r0,r0 */
|
||
0x22, 0x62, /* mov.l @r2,r2 */
|
||
0x2b, 0x40, /* jmp @r0 */
|
||
0x00, 0xe0, /* mov #0,r0 */
|
||
0x09, 0x00, /* nop */
|
||
0x09, 0x00, /* nop */
|
||
0x09, 0x00, /* nop */
|
||
0x09, 0x00, /* nop */
|
||
0, 0, 0, 0, /* 1: replaced with address of .got.plt + 8. */
|
||
0, 0, 0, 0, /* 2: replaced with address of .got.plt + 4. */
|
||
};
|
||
|
||
/* Sebsequent entries in an absolute procedure linkage table look like
|
||
this. */
|
||
|
||
static const bfd_byte elf_sh_plt_entry_be[PLT_ENTRY_SIZE] =
|
||
{
|
||
0xd0, 0x04, /* mov.l 1f,r0 */
|
||
0x60, 0x02, /* mov.l @r0,r0 */
|
||
0xd2, 0x02, /* mov.l 0f,r2 */
|
||
0x40, 0x2b, /* jmp @r0 */
|
||
0x60, 0x23, /* mov r2,r0 */
|
||
0xd1, 0x03, /* mov.l 2f,r1 */
|
||
0x40, 0x2b, /* jmp @r0 */
|
||
0x00, 0x09, /* nop */
|
||
0, 0, 0, 0, /* 0: replaced with address of .PLT0. */
|
||
0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
|
||
0, 0, 0, 0, /* 2: replaced with offset into relocation table. */
|
||
};
|
||
|
||
static const bfd_byte elf_sh_plt_entry_le[PLT_ENTRY_SIZE] =
|
||
{
|
||
0x04, 0xd0, /* mov.l 1f,r0 */
|
||
0x02, 0x60, /* mov.l @r0,r0 */
|
||
0x02, 0xd2, /* mov.l 0f,r2 */
|
||
0x2b, 0x40, /* jmp @r0 */
|
||
0x23, 0x60, /* mov r2,r0 */
|
||
0x03, 0xd1, /* mov.l 2f,r1 */
|
||
0x2b, 0x40, /* jmp @r0 */
|
||
0x09, 0x00, /* nop */
|
||
0, 0, 0, 0, /* 0: replaced with address of .PLT. */
|
||
0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
|
||
0, 0, 0, 0, /* 2: replaced with offset into relocation table. */
|
||
};
|
||
|
||
/* Entries in a PIC procedure linkage table look like this. */
|
||
|
||
static const bfd_byte elf_sh_pic_plt_entry_be[PLT_ENTRY_SIZE] =
|
||
{
|
||
0xd0, 0x04, /* mov.l 1f,r0 */
|
||
0x00, 0xce, /* mov.l @(r0,r12),r0 */
|
||
0x40, 0x2b, /* jmp @r0 */
|
||
0x00, 0x09, /* nop */
|
||
0x50, 0xc2, /* 0: mov.l @(8,r12),r0 */
|
||
0x52, 0xc1, /* 1: mov.l @(4,r12),r2 */
|
||
0xd1, 0x02, /* mov.l 2f,r1 */
|
||
0x40, 0x2b, /* jmp @r0 */
|
||
0xe0, 0x00, /* mov #0,r0 ! shows the type of PLT. */
|
||
0x00, 0x09, /* nop */
|
||
0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
|
||
0, 0, 0, 0 /* 2: replaced with offset into relocation table. */
|
||
};
|
||
|
||
static const bfd_byte elf_sh_pic_plt_entry_le[PLT_ENTRY_SIZE] =
|
||
{
|
||
0x04, 0xd0, /* mov.l 1f,r0 */
|
||
0xce, 0x00, /* mov.l @(r0,r12),r0 */
|
||
0x2b, 0x40, /* jmp @r0 */
|
||
0x09, 0x00, /* nop */
|
||
0xc2, 0x50, /* 0: mov.l @(8,r12),r0 */
|
||
0xc1, 0x52, /* 1: mov.l @(4,r12),r2 */
|
||
0x02, 0xd1, /* mov.l 2f,r1 */
|
||
0x2b, 0x40, /* jmp @r0 */
|
||
0x00, 0xe0, /* mov #0,r0 ! shows the type of PLT. */
|
||
0x09, 0x00, /* nop */
|
||
0, 0, 0, 0, /* 1: replaced with address of this symbol in .got. */
|
||
0, 0, 0, 0 /* 2: replaced with offset into relocation table. */
|
||
};
|
||
#endif /* old style PLT entries. */
|
||
|
||
static const bfd_byte *elf_sh_plt0_entry;
|
||
static const bfd_byte *elf_sh_plt_entry;
|
||
static const bfd_byte *elf_sh_pic_plt_entry;
|
||
|
||
/* Return size of a PLT entry. */
|
||
#define elf_sh_sizeof_plt(info) PLT_ENTRY_SIZE
|
||
|
||
/* Return offset of the PLT0 address in an absolute PLT entry. */
|
||
#define elf_sh_plt_plt0_offset(info) 16
|
||
|
||
/* Return offset of the linker in PLT0 entry. */
|
||
#define elf_sh_plt0_linker_offset(info) 20
|
||
|
||
/* Return offset of the GOT id in PLT0 entry. */
|
||
#define elf_sh_plt0_gotid_offset(info) 24
|
||
|
||
/* Return offset of the tempoline in PLT entry */
|
||
#define elf_sh_plt_temp_offset(info) 8
|
||
|
||
/* Return offset of the symbol in PLT entry. */
|
||
#define elf_sh_plt_symbol_offset(info) 20
|
||
|
||
/* Return offset of the relocation in PLT entry. */
|
||
#define elf_sh_plt_reloc_offset(info) 24
|
||
|
||
/* The sh linker needs to keep track of the number of relocs that it
|
||
decides to copy in check_relocs for each symbol. This is so that
|
||
it can discard PC relative relocs if it doesn't need them when
|
||
linking with -Bsymbolic. We store the information in a field
|
||
extending the regular ELF linker hash table. */
|
||
|
||
/* This structure keeps track of the number of PC relative relocs we
|
||
have copied for a given symbol. */
|
||
|
||
struct elf_sh_pcrel_relocs_copied
|
||
{
|
||
/* Next section. */
|
||
struct elf_sh_pcrel_relocs_copied *next;
|
||
/* A section in dynobj. */
|
||
asection *section;
|
||
/* Number of relocs copied in this section. */
|
||
bfd_size_type count;
|
||
};
|
||
|
||
/* sh ELF linker hash entry. */
|
||
|
||
struct elf_sh_link_hash_entry
|
||
{
|
||
struct elf_link_hash_entry root;
|
||
|
||
/* Number of PC relative relocs copied for this symbol. */
|
||
struct elf_sh_pcrel_relocs_copied *pcrel_relocs_copied;
|
||
};
|
||
|
||
/* sh ELF linker hash table. */
|
||
|
||
struct elf_sh_link_hash_table
|
||
{
|
||
struct elf_link_hash_table root;
|
||
};
|
||
|
||
/* Declare this now that the above structures are defined. */
|
||
|
||
static boolean sh_elf_discard_copies
|
||
PARAMS ((struct elf_sh_link_hash_entry *, PTR));
|
||
|
||
/* Traverse an sh ELF linker hash table. */
|
||
|
||
#define sh_elf_link_hash_traverse(table, func, info) \
|
||
(elf_link_hash_traverse \
|
||
(&(table)->root, \
|
||
(boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
|
||
(info)))
|
||
|
||
/* Get the sh ELF linker hash table from a link_info structure. */
|
||
|
||
#define sh_elf_hash_table(p) \
|
||
((struct elf_sh_link_hash_table *) ((p)->hash))
|
||
|
||
/* Create an entry in an sh ELF linker hash table. */
|
||
|
||
static struct bfd_hash_entry *
|
||
sh_elf_link_hash_newfunc (entry, table, string)
|
||
struct bfd_hash_entry *entry;
|
||
struct bfd_hash_table *table;
|
||
const char *string;
|
||
{
|
||
struct elf_sh_link_hash_entry *ret =
|
||
(struct elf_sh_link_hash_entry *) entry;
|
||
|
||
/* Allocate the structure if it has not already been allocated by a
|
||
subclass. */
|
||
if (ret == (struct elf_sh_link_hash_entry *) NULL)
|
||
ret = ((struct elf_sh_link_hash_entry *)
|
||
bfd_hash_allocate (table,
|
||
sizeof (struct elf_sh_link_hash_entry)));
|
||
if (ret == (struct elf_sh_link_hash_entry *) NULL)
|
||
return (struct bfd_hash_entry *) ret;
|
||
|
||
/* Call the allocation method of the superclass. */
|
||
ret = ((struct elf_sh_link_hash_entry *)
|
||
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
|
||
table, string));
|
||
if (ret != (struct elf_sh_link_hash_entry *) NULL)
|
||
{
|
||
ret->pcrel_relocs_copied = NULL;
|
||
}
|
||
|
||
return (struct bfd_hash_entry *) ret;
|
||
}
|
||
|
||
/* Create an sh ELF linker hash table. */
|
||
|
||
static struct bfd_link_hash_table *
|
||
sh_elf_link_hash_table_create (abfd)
|
||
bfd *abfd;
|
||
{
|
||
struct elf_sh_link_hash_table *ret;
|
||
bfd_size_type amt = sizeof (struct elf_sh_link_hash_table);
|
||
|
||
ret = (struct elf_sh_link_hash_table *) bfd_alloc (abfd, amt);
|
||
if (ret == (struct elf_sh_link_hash_table *) NULL)
|
||
return NULL;
|
||
|
||
if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
|
||
sh_elf_link_hash_newfunc))
|
||
{
|
||
bfd_release (abfd, ret);
|
||
return NULL;
|
||
}
|
||
|
||
return &ret->root.root;
|
||
}
|
||
|
||
/* Create dynamic sections when linking against a dynamic object. */
|
||
|
||
static boolean
|
||
sh_elf_create_dynamic_sections (abfd, info)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
flagword flags, pltflags;
|
||
register asection *s;
|
||
struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
int ptralign = 0;
|
||
|
||
switch (bed->s->arch_size)
|
||
{
|
||
case 32:
|
||
ptralign = 2;
|
||
break;
|
||
|
||
case 64:
|
||
ptralign = 3;
|
||
break;
|
||
|
||
default:
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
|
||
/* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
|
||
.rel[a].bss sections. */
|
||
|
||
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED);
|
||
|
||
pltflags = flags;
|
||
pltflags |= SEC_CODE;
|
||
if (bed->plt_not_loaded)
|
||
pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
|
||
if (bed->plt_readonly)
|
||
pltflags |= SEC_READONLY;
|
||
|
||
s = bfd_make_section (abfd, ".plt");
|
||
if (s == NULL
|
||
|| ! bfd_set_section_flags (abfd, s, pltflags)
|
||
|| ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
|
||
return false;
|
||
|
||
if (bed->want_plt_sym)
|
||
{
|
||
/* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
|
||
.plt section. */
|
||
struct elf_link_hash_entry *h = NULL;
|
||
if (! (_bfd_generic_link_add_one_symbol
|
||
(info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
|
||
(bfd_vma) 0, (const char *) NULL, false,
|
||
get_elf_backend_data (abfd)->collect,
|
||
(struct bfd_link_hash_entry **) &h)))
|
||
return false;
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
|
||
h->type = STT_OBJECT;
|
||
|
||
if (info->shared
|
||
&& ! _bfd_elf_link_record_dynamic_symbol (info, h))
|
||
return false;
|
||
}
|
||
|
||
s = bfd_make_section (abfd,
|
||
bed->default_use_rela_p ? ".rela.plt" : ".rel.plt");
|
||
if (s == NULL
|
||
|| ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
|
||
|| ! bfd_set_section_alignment (abfd, s, ptralign))
|
||
return false;
|
||
|
||
if (! _bfd_elf_create_got_section (abfd, info))
|
||
return false;
|
||
|
||
{
|
||
const char *secname;
|
||
char *relname;
|
||
flagword secflags;
|
||
asection *sec;
|
||
|
||
for (sec = abfd->sections; sec; sec = sec->next)
|
||
{
|
||
secflags = bfd_get_section_flags (abfd, sec);
|
||
if ((secflags & (SEC_DATA | SEC_LINKER_CREATED))
|
||
|| ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS))
|
||
continue;
|
||
secname = bfd_get_section_name (abfd, sec);
|
||
relname = (char *) bfd_malloc ((bfd_size_type) strlen (secname) + 6);
|
||
strcpy (relname, ".rela");
|
||
strcat (relname, secname);
|
||
s = bfd_make_section (abfd, relname);
|
||
if (s == NULL
|
||
|| ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
|
||
|| ! bfd_set_section_alignment (abfd, s, ptralign))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if (bed->want_dynbss)
|
||
{
|
||
/* The .dynbss section is a place to put symbols which are defined
|
||
by dynamic objects, are referenced by regular objects, and are
|
||
not functions. We must allocate space for them in the process
|
||
image and use a R_*_COPY reloc to tell the dynamic linker to
|
||
initialize them at run time. The linker script puts the .dynbss
|
||
section into the .bss section of the final image. */
|
||
s = bfd_make_section (abfd, ".dynbss");
|
||
if (s == NULL
|
||
|| ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
|
||
return false;
|
||
|
||
/* The .rel[a].bss section holds copy relocs. This section is not
|
||
normally needed. We need to create it here, though, so that the
|
||
linker will map it to an output section. We can't just create it
|
||
only if we need it, because we will not know whether we need it
|
||
until we have seen all the input files, and the first time the
|
||
main linker code calls BFD after examining all the input files
|
||
(size_dynamic_sections) the input sections have already been
|
||
mapped to the output sections. If the section turns out not to
|
||
be needed, we can discard it later. We will never need this
|
||
section when generating a shared object, since they do not use
|
||
copy relocs. */
|
||
if (! info->shared)
|
||
{
|
||
s = bfd_make_section (abfd,
|
||
(bed->default_use_rela_p
|
||
? ".rela.bss" : ".rel.bss"));
|
||
if (s == NULL
|
||
|| ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
|
||
|| ! bfd_set_section_alignment (abfd, s, ptralign))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Adjust a symbol defined by a dynamic object and referenced by a
|
||
regular object. The current definition is in some section of the
|
||
dynamic object, but we're not including those sections. We have to
|
||
change the definition to something the rest of the link can
|
||
understand. */
|
||
|
||
static boolean
|
||
sh_elf_adjust_dynamic_symbol (info, h)
|
||
struct bfd_link_info *info;
|
||
struct elf_link_hash_entry *h;
|
||
{
|
||
bfd *dynobj;
|
||
asection *s;
|
||
unsigned int power_of_two;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
/* Make sure we know what is going on here. */
|
||
BFD_ASSERT (dynobj != NULL
|
||
&& ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
|
||
|| h->weakdef != NULL
|
||
|| ((h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_REF_REGULAR) != 0
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0)));
|
||
|
||
/* If this is a function, put it in the procedure linkage table. We
|
||
will fill in the contents of the procedure linkage table later,
|
||
when we know the address of the .got section. */
|
||
if (h->type == STT_FUNC
|
||
|| (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
|
||
{
|
||
if (! info->shared
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
|
||
{
|
||
/* This case can occur if we saw a PLT reloc in an input
|
||
file, but the symbol was never referred to by a dynamic
|
||
object. In such a case, we don't actually need to build
|
||
a procedure linkage table, and we can just do a REL32
|
||
reloc instead. */
|
||
BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
|
||
return true;
|
||
}
|
||
|
||
/* Make sure this symbol is output as a dynamic symbol. */
|
||
if (h->dynindx == -1)
|
||
{
|
||
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
|
||
return false;
|
||
}
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
/* If this is the first .plt entry, make room for the special
|
||
first entry. */
|
||
if (s->_raw_size == 0)
|
||
s->_raw_size += PLT_ENTRY_SIZE;
|
||
|
||
/* If this symbol is not defined in a regular file, and we are
|
||
not generating a shared library, then set the symbol to this
|
||
location in the .plt. This is required to make function
|
||
pointers compare as equal between the normal executable and
|
||
the shared library. */
|
||
if (! info->shared
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
{
|
||
h->root.u.def.section = s;
|
||
h->root.u.def.value = s->_raw_size;
|
||
}
|
||
|
||
h->plt.offset = s->_raw_size;
|
||
|
||
/* Make room for this entry. */
|
||
s->_raw_size += elf_sh_sizeof_plt (info);
|
||
|
||
/* We also need to make an entry in the .got.plt section, which
|
||
will be placed in the .got section by the linker script. */
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".got.plt");
|
||
BFD_ASSERT (s != NULL);
|
||
s->_raw_size += 4;
|
||
|
||
/* We also need to make an entry in the .rela.plt section. */
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".rela.plt");
|
||
BFD_ASSERT (s != NULL);
|
||
s->_raw_size += sizeof (Elf32_External_Rela);
|
||
|
||
return true;
|
||
}
|
||
|
||
/* If this is a weak symbol, and there is a real definition, the
|
||
processor independent code will have arranged for us to see the
|
||
real definition first, and we can just use the same value. */
|
||
if (h->weakdef != NULL)
|
||
{
|
||
BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
|
||
|| h->weakdef->root.type == bfd_link_hash_defweak);
|
||
h->root.u.def.section = h->weakdef->root.u.def.section;
|
||
h->root.u.def.value = h->weakdef->root.u.def.value;
|
||
return true;
|
||
}
|
||
|
||
/* This is a reference to a symbol defined by a dynamic object which
|
||
is not a function. */
|
||
|
||
/* If we are creating a shared library, we must presume that the
|
||
only references to the symbol are via the global offset table.
|
||
For such cases we need not do anything here; the relocations will
|
||
be handled correctly by relocate_section. */
|
||
if (info->shared)
|
||
return true;
|
||
|
||
/* If there are no references to this symbol that do not use the
|
||
GOT, we don't need to generate a copy reloc. */
|
||
if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
|
||
return true;
|
||
|
||
/* We must allocate the symbol in our .dynbss section, which will
|
||
become part of the .bss section of the executable. There will be
|
||
an entry for this symbol in the .dynsym section. The dynamic
|
||
object will contain position independent code, so all references
|
||
from the dynamic object to this symbol will go through the global
|
||
offset table. The dynamic linker will use the .dynsym entry to
|
||
determine the address it must put in the global offset table, so
|
||
both the dynamic object and the regular object will refer to the
|
||
same memory location for the variable. */
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".dynbss");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
/* We must generate a R_SH_COPY reloc to tell the dynamic linker to
|
||
copy the initial value out of the dynamic object and into the
|
||
runtime process image. We need to remember the offset into the
|
||
.rela.bss section we are going to use. */
|
||
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
||
{
|
||
asection *srel;
|
||
|
||
srel = bfd_get_section_by_name (dynobj, ".rela.bss");
|
||
BFD_ASSERT (srel != NULL);
|
||
srel->_raw_size += sizeof (Elf32_External_Rela);
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
|
||
}
|
||
|
||
/* We need to figure out the alignment required for this symbol. I
|
||
have no idea how ELF linkers handle this. */
|
||
power_of_two = bfd_log2 (h->size);
|
||
if (power_of_two > 3)
|
||
power_of_two = 3;
|
||
|
||
/* Apply the required alignment. */
|
||
s->_raw_size = BFD_ALIGN (s->_raw_size,
|
||
(bfd_size_type) (1 << power_of_two));
|
||
if (power_of_two > bfd_get_section_alignment (dynobj, s))
|
||
{
|
||
if (! bfd_set_section_alignment (dynobj, s, power_of_two))
|
||
return false;
|
||
}
|
||
|
||
/* Define the symbol as being at this point in the section. */
|
||
h->root.u.def.section = s;
|
||
h->root.u.def.value = s->_raw_size;
|
||
|
||
/* Increment the section size to make room for the symbol. */
|
||
s->_raw_size += h->size;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Set the sizes of the dynamic sections. */
|
||
|
||
static boolean
|
||
sh_elf_size_dynamic_sections (output_bfd, info)
|
||
bfd *output_bfd ATTRIBUTE_UNUSED;
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd *dynobj;
|
||
asection *s;
|
||
boolean plt;
|
||
boolean relocs;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
BFD_ASSERT (dynobj != NULL);
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Set the contents of the .interp section to the interpreter. */
|
||
if (! info->shared)
|
||
{
|
||
s = bfd_get_section_by_name (dynobj, ".interp");
|
||
BFD_ASSERT (s != NULL);
|
||
s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
|
||
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* We may have created entries in the .rela.got section.
|
||
However, if we are not creating the dynamic sections, we will
|
||
not actually use these entries. Reset the size of .rela.got,
|
||
which will cause it to get stripped from the output file
|
||
below. */
|
||
s = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
if (s != NULL)
|
||
s->_raw_size = 0;
|
||
}
|
||
|
||
/* If this is a -Bsymbolic shared link, then we need to discard all
|
||
PC relative relocs against symbols defined in a regular object.
|
||
We allocated space for them in the check_relocs routine, but we
|
||
will not fill them in in the relocate_section routine. */
|
||
if (info->shared && info->symbolic)
|
||
sh_elf_link_hash_traverse (sh_elf_hash_table (info),
|
||
sh_elf_discard_copies,
|
||
(PTR) NULL);
|
||
|
||
/* The check_relocs and adjust_dynamic_symbol entry points have
|
||
determined the sizes of the various dynamic sections. Allocate
|
||
memory for them. */
|
||
plt = false;
|
||
relocs = false;
|
||
for (s = dynobj->sections; s != NULL; s = s->next)
|
||
{
|
||
const char *name;
|
||
boolean strip;
|
||
|
||
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
||
continue;
|
||
|
||
/* It's OK to base decisions on the section name, because none
|
||
of the dynobj section names depend upon the input files. */
|
||
name = bfd_get_section_name (dynobj, s);
|
||
|
||
strip = false;
|
||
|
||
if (strcmp (name, ".plt") == 0)
|
||
{
|
||
if (s->_raw_size == 0)
|
||
{
|
||
/* Strip this section if we don't need it; see the
|
||
comment below. */
|
||
strip = true;
|
||
}
|
||
else
|
||
{
|
||
/* Remember whether there is a PLT. */
|
||
plt = true;
|
||
}
|
||
}
|
||
else if (strncmp (name, ".rela", 5) == 0)
|
||
{
|
||
if (s->_raw_size == 0)
|
||
{
|
||
/* If we don't need this section, strip it from the
|
||
output file. This is mostly to handle .rela.bss and
|
||
.rela.plt. We must create both sections in
|
||
create_dynamic_sections, because they must be created
|
||
before the linker maps input sections to output
|
||
sections. The linker does that before
|
||
adjust_dynamic_symbol is called, and it is that
|
||
function which decides whether anything needs to go
|
||
into these sections. */
|
||
strip = true;
|
||
}
|
||
else
|
||
{
|
||
/* Remember whether there are any reloc sections other
|
||
than .rela.plt. */
|
||
if (strcmp (name, ".rela.plt") != 0)
|
||
relocs = true;
|
||
|
||
/* We use the reloc_count field as a counter if we need
|
||
to copy relocs into the output file. */
|
||
s->reloc_count = 0;
|
||
}
|
||
}
|
||
else if (strncmp (name, ".got", 4) != 0)
|
||
{
|
||
/* It's not one of our sections, so don't allocate space. */
|
||
continue;
|
||
}
|
||
|
||
if (strip)
|
||
{
|
||
_bfd_strip_section_from_output (info, s);
|
||
continue;
|
||
}
|
||
|
||
/* Allocate memory for the section contents. */
|
||
s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
|
||
if (s->contents == NULL && s->_raw_size != 0)
|
||
return false;
|
||
}
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Add some entries to the .dynamic section. We fill in the
|
||
values later, in sh_elf_finish_dynamic_sections, but we
|
||
must add the entries now so that we get the correct size for
|
||
the .dynamic section. The DT_DEBUG entry is filled in by the
|
||
dynamic linker and used by the debugger. */
|
||
#define add_dynamic_entry(TAG, VAL) \
|
||
bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
|
||
|
||
if (! info->shared)
|
||
{
|
||
if (!add_dynamic_entry (DT_DEBUG, 0))
|
||
return false;
|
||
}
|
||
|
||
if (plt)
|
||
{
|
||
if (!add_dynamic_entry (DT_PLTGOT, 0)
|
||
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
|
||
|| !add_dynamic_entry (DT_PLTREL, DT_RELA)
|
||
|| !add_dynamic_entry (DT_JMPREL, 0))
|
||
return false;
|
||
}
|
||
|
||
if (relocs)
|
||
{
|
||
if (!add_dynamic_entry (DT_RELA, 0)
|
||
|| !add_dynamic_entry (DT_RELASZ, 0)
|
||
|| !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
|
||
return false;
|
||
}
|
||
|
||
if ((info->flags & DF_TEXTREL) != 0)
|
||
{
|
||
if (!add_dynamic_entry (DT_TEXTREL, 0))
|
||
return false;
|
||
}
|
||
}
|
||
#undef add_dynamic_entry
|
||
|
||
return true;
|
||
}
|
||
|
||
/* This function is called via sh_elf_link_hash_traverse if we are
|
||
creating a shared object with -Bsymbolic. It discards the space
|
||
allocated to copy PC relative relocs against symbols which are
|
||
defined in regular objects. We allocated space for them in the
|
||
check_relocs routine, but we won't fill them in in the
|
||
relocate_section routine. */
|
||
|
||
static boolean
|
||
sh_elf_discard_copies (h, ignore)
|
||
struct elf_sh_link_hash_entry *h;
|
||
PTR ignore ATTRIBUTE_UNUSED;
|
||
{
|
||
struct elf_sh_pcrel_relocs_copied *s;
|
||
|
||
/* We only discard relocs for symbols defined in a regular object. */
|
||
if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
return true;
|
||
|
||
for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
|
||
s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela);
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Relocate an SH ELF section. */
|
||
|
||
static boolean
|
||
sh_elf_relocate_section (output_bfd, info, input_bfd, input_section,
|
||
contents, relocs, local_syms, local_sections)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
bfd *input_bfd;
|
||
asection *input_section;
|
||
bfd_byte *contents;
|
||
Elf_Internal_Rela *relocs;
|
||
Elf_Internal_Sym *local_syms;
|
||
asection **local_sections;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
Elf_Internal_Rela *rel, *relend;
|
||
bfd *dynobj;
|
||
bfd_vma *local_got_offsets;
|
||
asection *sgot;
|
||
asection *splt;
|
||
asection *sreloc;
|
||
|
||
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
local_got_offsets = elf_local_got_offsets (input_bfd);
|
||
|
||
sgot = NULL;
|
||
splt = NULL;
|
||
sreloc = NULL;
|
||
|
||
rel = relocs;
|
||
relend = relocs + input_section->reloc_count;
|
||
for (; rel < relend; rel++)
|
||
{
|
||
int r_type;
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
Elf_Internal_Sym *sym;
|
||
asection *sec;
|
||
struct elf_link_hash_entry *h;
|
||
bfd_vma relocation;
|
||
bfd_vma addend = (bfd_vma) 0;
|
||
bfd_reloc_status_type r;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
|
||
/* Many of the relocs are only used for relaxing, and are
|
||
handled entirely by the relaxation code. */
|
||
if (r_type > (int) R_SH_LAST_INVALID_RELOC
|
||
&& r_type < (int) R_SH_LOOP_START)
|
||
continue;
|
||
if (r_type == (int) R_SH_NONE)
|
||
continue;
|
||
|
||
if (r_type < 0
|
||
|| r_type >= R_SH_max
|
||
|| (r_type >= (int) R_SH_FIRST_INVALID_RELOC
|
||
&& r_type <= (int) R_SH_LAST_INVALID_RELOC)
|
||
|| (r_type >= (int) R_SH_FIRST_INVALID_RELOC_2
|
||
&& r_type <= (int) R_SH_LAST_INVALID_RELOC_2))
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
|
||
howto = sh_elf_howto_table + r_type;
|
||
|
||
/* For relocs that aren't partial_inplace, we get the addend from
|
||
the relocation. */
|
||
if (! howto->partial_inplace)
|
||
addend = rel->r_addend;
|
||
|
||
h = NULL;
|
||
sym = NULL;
|
||
sec = NULL;
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections[r_symndx];
|
||
relocation = (sec->output_section->vma
|
||
+ sec->output_offset
|
||
+ sym->st_value);
|
||
if (info->relocateable)
|
||
{
|
||
/* This is a relocateable link. We don't have to change
|
||
anything, unless the reloc is against a section symbol,
|
||
in which case we have to adjust according to where the
|
||
section symbol winds up in the output section. */
|
||
sym = local_syms + r_symndx;
|
||
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
||
{
|
||
if (! howto->partial_inplace)
|
||
{
|
||
/* For relocations with the addend in the
|
||
relocation, we need just to update the addend.
|
||
All real relocs are of type partial_inplace; this
|
||
code is mostly for completeness. */
|
||
rel->r_addend += sec->output_offset + sym->st_value;
|
||
|
||
continue;
|
||
}
|
||
|
||
/* Relocs of type partial_inplace need to pick up the
|
||
contents in the contents and add the offset resulting
|
||
from the changed location of the section symbol.
|
||
Using _bfd_final_link_relocate (e.g. goto
|
||
final_link_relocate) here would be wrong, because
|
||
relocations marked pc_relative would get the current
|
||
location subtracted, and we must only do that at the
|
||
final link. */
|
||
r = _bfd_relocate_contents (howto, input_bfd,
|
||
sec->output_offset
|
||
+ sym->st_value,
|
||
contents + rel->r_offset);
|
||
goto relocation_done;
|
||
}
|
||
|
||
continue;
|
||
}
|
||
else if (! howto->partial_inplace)
|
||
{
|
||
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
|
||
addend = rel->r_addend;
|
||
}
|
||
else if ((sec->flags & SEC_MERGE)
|
||
&& ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
||
{
|
||
asection *msec;
|
||
|
||
if (howto->rightshift || howto->src_mask != 0xffffffff)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"),
|
||
bfd_archive_filename (input_bfd),
|
||
bfd_get_section_name (input_bfd, input_section),
|
||
(long) rel->r_offset, howto->name);
|
||
return false;
|
||
}
|
||
|
||
addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
||
msec = sec;
|
||
addend =
|
||
_bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
|
||
- relocation;
|
||
addend += msec->output_section->vma + msec->output_offset;
|
||
bfd_put_32 (input_bfd, addend, contents + rel->r_offset);
|
||
addend = 0;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Section symbol are never (?) placed in the hash table, so
|
||
we can just ignore hash relocations when creating a
|
||
relocateable object file. */
|
||
if (info->relocateable)
|
||
continue;
|
||
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
while (h->root.type == bfd_link_hash_indirect
|
||
|| h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
sec = h->root.u.def.section;
|
||
/* In these cases, we don't need the relocation value.
|
||
We check specially because in some obscure cases
|
||
sec->output_section will be NULL. */
|
||
if (r_type == R_SH_GOTPC
|
||
|| (r_type == R_SH_PLT32
|
||
&& h->plt.offset != (bfd_vma) -1)
|
||
|| (r_type == R_SH_GOT32
|
||
&& elf_hash_table (info)->dynamic_sections_created
|
||
&& (! info->shared
|
||
|| (! info->symbolic && h->dynindx != -1)
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
||
/* The cases above are those in which relocation is
|
||
overwritten in the switch block below. The cases
|
||
below are those in which we must defer relocation
|
||
to run-time, because we can't resolve absolute
|
||
addresses when creating a shared library. */
|
||
|| (info->shared
|
||
&& ((! info->symbolic && h->dynindx != -1)
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
&& ((r_type == R_SH_DIR32
|
||
&& !(ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
|
||
|| ELF_ST_VISIBILITY (h->other) == STV_HIDDEN))
|
||
|| r_type == R_SH_REL32)
|
||
&& ((input_section->flags & SEC_ALLOC) != 0
|
||
/* DWARF will emit R_SH_DIR32 relocations in its
|
||
sections against symbols defined externally
|
||
in shared libraries. We can't do anything
|
||
with them here. */
|
||
|| (input_section->flags & SEC_DEBUGGING) != 0)))
|
||
relocation = 0;
|
||
else if (sec->output_section == NULL)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
|
||
bfd_archive_filename (input_bfd), h->root.root.string,
|
||
bfd_get_section_name (input_bfd, input_section));
|
||
relocation = 0;
|
||
}
|
||
else
|
||
relocation = (h->root.u.def.value
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
}
|
||
else if (h->root.type == bfd_link_hash_undefweak)
|
||
relocation = 0;
|
||
else if (info->shared
|
||
&& (!info->symbolic || info->allow_shlib_undefined)
|
||
&& !info->no_undefined)
|
||
relocation = 0;
|
||
else
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section, rel->r_offset, true)))
|
||
return false;
|
||
relocation = 0;
|
||
}
|
||
}
|
||
|
||
switch ((int) r_type)
|
||
{
|
||
final_link_relocate:
|
||
/* COFF relocs don't use the addend. The addend is used for
|
||
R_SH_DIR32 to be compatible with other compilers. */
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, addend);
|
||
break;
|
||
|
||
case R_SH_IND12W:
|
||
relocation -= 4;
|
||
goto final_link_relocate;
|
||
|
||
case R_SH_DIR8WPN:
|
||
case R_SH_DIR8WPZ:
|
||
case R_SH_DIR8WPL:
|
||
/* If the reloc is against the start of this section, then
|
||
the assembler has already taken care of it and the reloc
|
||
is here only to assist in relaxing. If the reloc is not
|
||
against the start of this section, then it's against an
|
||
external symbol and we must deal with it ourselves. */
|
||
if (input_section->output_section->vma + input_section->output_offset
|
||
!= relocation)
|
||
{
|
||
int disp = (relocation
|
||
- input_section->output_section->vma
|
||
- input_section->output_offset
|
||
- rel->r_offset);
|
||
int mask = 0;
|
||
switch (r_type)
|
||
{
|
||
case R_SH_DIR8WPN:
|
||
case R_SH_DIR8WPZ: mask = 1; break;
|
||
case R_SH_DIR8WPL: mask = 3; break;
|
||
default: mask = 0; break;
|
||
}
|
||
if (disp & mask)
|
||
{
|
||
((*_bfd_error_handler)
|
||
(_("%s: 0x%lx: fatal: unaligned branch target for relax-support relocation"),
|
||
bfd_archive_filename (input_section->owner),
|
||
(unsigned long) rel->r_offset));
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
relocation -= 4;
|
||
goto final_link_relocate;
|
||
}
|
||
r = bfd_reloc_ok;
|
||
break;
|
||
|
||
default:
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
|
||
case R_SH_DIR32:
|
||
case R_SH_REL32:
|
||
if (info->shared
|
||
&& r_symndx != 0
|
||
&& (input_section->flags & SEC_ALLOC) != 0
|
||
&& (r_type != R_SH_REL32
|
||
|| (h != NULL
|
||
&& h->dynindx != -1
|
||
&& (! info->symbolic
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
boolean skip, relocate;
|
||
|
||
/* When generating a shared object, these relocations
|
||
are copied into the output file to be resolved at run
|
||
time. */
|
||
|
||
if (sreloc == NULL)
|
||
{
|
||
const char *name;
|
||
|
||
name = (bfd_elf_string_from_elf_section
|
||
(input_bfd,
|
||
elf_elfheader (input_bfd)->e_shstrndx,
|
||
elf_section_data (input_section)->rel_hdr.sh_name));
|
||
if (name == NULL)
|
||
return false;
|
||
|
||
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
|
||
&& strcmp (bfd_get_section_name (input_bfd,
|
||
input_section),
|
||
name + 5) == 0);
|
||
|
||
sreloc = bfd_get_section_by_name (dynobj, name);
|
||
BFD_ASSERT (sreloc != NULL);
|
||
}
|
||
|
||
skip = false;
|
||
|
||
outrel.r_offset =
|
||
_bfd_elf_section_offset (output_bfd, info, input_section,
|
||
rel->r_offset);
|
||
if (outrel.r_offset == (bfd_vma) -1)
|
||
skip = true;
|
||
outrel.r_offset += (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
|
||
if (skip)
|
||
{
|
||
memset (&outrel, 0, sizeof outrel);
|
||
relocate = false;
|
||
}
|
||
else if (r_type == R_SH_REL32)
|
||
{
|
||
BFD_ASSERT (h != NULL && h->dynindx != -1);
|
||
relocate = false;
|
||
outrel.r_info = ELF32_R_INFO (h->dynindx, R_SH_REL32);
|
||
outrel.r_addend
|
||
= bfd_get_32 (input_bfd, contents + rel->r_offset);
|
||
}
|
||
else
|
||
{
|
||
/* h->dynindx may be -1 if this symbol was marked to
|
||
become local. */
|
||
if (h == NULL
|
||
|| ((info->symbolic || h->dynindx == -1)
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) != 0))
|
||
{
|
||
relocate = true;
|
||
outrel.r_info = ELF32_R_INFO (0, R_SH_RELATIVE);
|
||
outrel.r_addend
|
||
= relocation + bfd_get_32 (input_bfd,
|
||
contents + rel->r_offset);
|
||
}
|
||
else
|
||
{
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
relocate = false;
|
||
outrel.r_info = ELF32_R_INFO (h->dynindx, R_SH_DIR32);
|
||
outrel.r_addend
|
||
= relocation + bfd_get_32 (input_bfd,
|
||
contents + rel->r_offset);
|
||
}
|
||
}
|
||
|
||
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
|
||
(((Elf32_External_Rela *)
|
||
sreloc->contents)
|
||
+ sreloc->reloc_count));
|
||
++sreloc->reloc_count;
|
||
|
||
/* If this reloc is against an external symbol, we do
|
||
not want to fiddle with the addend. Otherwise, we
|
||
need to include the symbol value so that it becomes
|
||
an addend for the dynamic reloc. */
|
||
if (! relocate)
|
||
continue;
|
||
}
|
||
goto final_link_relocate;
|
||
|
||
case R_SH_GOT32:
|
||
/* Relocation is to the entry for this symbol in the global
|
||
offset table. */
|
||
if (sgot == NULL)
|
||
{
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != NULL);
|
||
}
|
||
|
||
if (h != NULL)
|
||
{
|
||
bfd_vma off;
|
||
|
||
off = h->got.offset;
|
||
BFD_ASSERT (off != (bfd_vma) -1);
|
||
|
||
if (! elf_hash_table (info)->dynamic_sections_created
|
||
|| (info->shared
|
||
&& (info->symbolic || h->dynindx == -1
|
||
|| ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
|
||
|| ELF_ST_VISIBILITY (h->other) == STV_HIDDEN)
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
|
||
{
|
||
/* This is actually a static link, or it is a
|
||
-Bsymbolic link and the symbol is defined
|
||
locally, or the symbol was forced to be local
|
||
because of a version file. We must initialize
|
||
this entry in the global offset table. Since the
|
||
offset must always be a multiple of 4, we use the
|
||
least significant bit to record whether we have
|
||
initialized it already.
|
||
|
||
When doing a dynamic link, we create a .rela.got
|
||
relocation entry to initialize the value. This
|
||
is done in the finish_dynamic_symbol routine. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, relocation,
|
||
sgot->contents + off);
|
||
h->got.offset |= 1;
|
||
}
|
||
}
|
||
|
||
relocation = sgot->output_offset + off;
|
||
}
|
||
else
|
||
{
|
||
bfd_vma off;
|
||
|
||
BFD_ASSERT (local_got_offsets != NULL
|
||
&& local_got_offsets[r_symndx] != (bfd_vma) -1);
|
||
|
||
off = local_got_offsets[r_symndx];
|
||
|
||
/* The offset must always be a multiple of 4. We use
|
||
the least significant bit to record whether we have
|
||
already generated the necessary reloc. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, relocation, sgot->contents + off);
|
||
|
||
if (info->shared)
|
||
{
|
||
asection *srelgot;
|
||
Elf_Internal_Rela outrel;
|
||
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
BFD_ASSERT (srelgot != NULL);
|
||
|
||
outrel.r_offset = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ off);
|
||
outrel.r_info = ELF32_R_INFO (0, R_SH_RELATIVE);
|
||
outrel.r_addend = relocation;
|
||
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
|
||
(((Elf32_External_Rela *)
|
||
srelgot->contents)
|
||
+ srelgot->reloc_count));
|
||
++srelgot->reloc_count;
|
||
}
|
||
|
||
local_got_offsets[r_symndx] |= 1;
|
||
}
|
||
|
||
relocation = sgot->output_offset + off;
|
||
}
|
||
|
||
goto final_link_relocate;
|
||
|
||
case R_SH_GOTOFF:
|
||
/* Relocation is relative to the start of the global offset
|
||
table. */
|
||
|
||
if (sgot == NULL)
|
||
{
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != NULL);
|
||
}
|
||
|
||
/* Note that sgot->output_offset is not involved in this
|
||
calculation. We always want the start of .got. If we
|
||
defined _GLOBAL_OFFSET_TABLE in a different way, as is
|
||
permitted by the ABI, we might have to change this
|
||
calculation. */
|
||
relocation -= sgot->output_section->vma;
|
||
|
||
goto final_link_relocate;
|
||
|
||
case R_SH_GOTPC:
|
||
/* Use global offset table as symbol value. */
|
||
|
||
if (sgot == NULL)
|
||
{
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != NULL);
|
||
}
|
||
|
||
relocation = sgot->output_section->vma;
|
||
|
||
goto final_link_relocate;
|
||
|
||
case R_SH_PLT32:
|
||
/* Relocation is to the entry for this symbol in the
|
||
procedure linkage table. */
|
||
|
||
/* Resolve a PLT reloc against a local symbol directly,
|
||
without using the procedure linkage table. */
|
||
if (h == NULL)
|
||
goto final_link_relocate;
|
||
|
||
if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
|
||
|| ELF_ST_VISIBILITY (h->other) == STV_HIDDEN)
|
||
goto final_link_relocate;
|
||
|
||
if (h->plt.offset == (bfd_vma) -1)
|
||
{
|
||
/* We didn't make a PLT entry for this symbol. This
|
||
happens when statically linking PIC code, or when
|
||
using -Bsymbolic. */
|
||
goto final_link_relocate;
|
||
}
|
||
|
||
if (splt == NULL)
|
||
{
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (splt != NULL);
|
||
}
|
||
|
||
relocation = (splt->output_section->vma
|
||
+ splt->output_offset
|
||
+ h->plt.offset);
|
||
|
||
goto final_link_relocate;
|
||
|
||
case R_SH_LOOP_START:
|
||
{
|
||
static bfd_vma start, end;
|
||
|
||
start = (relocation + rel->r_addend
|
||
- (sec->output_section->vma + sec->output_offset));
|
||
r = sh_elf_reloc_loop (r_type, input_bfd, input_section, contents,
|
||
rel->r_offset, sec, start, end);
|
||
break;
|
||
|
||
case R_SH_LOOP_END:
|
||
end = (relocation + rel->r_addend
|
||
- (sec->output_section->vma + sec->output_offset));
|
||
r = sh_elf_reloc_loop (r_type, input_bfd, input_section, contents,
|
||
rel->r_offset, sec, start, end);
|
||
break;
|
||
}
|
||
}
|
||
|
||
relocation_done:
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
switch (r)
|
||
{
|
||
default:
|
||
case bfd_reloc_outofrange:
|
||
abort ();
|
||
case bfd_reloc_overflow:
|
||
{
|
||
const char *name;
|
||
|
||
if (h != NULL)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
name = (bfd_elf_string_from_elf_section
|
||
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
||
if (name == NULL)
|
||
return false;
|
||
if (*name == '\0')
|
||
name = bfd_section_name (input_bfd, sec);
|
||
}
|
||
if (! ((*info->callbacks->reloc_overflow)
|
||
(info, name, howto->name, (bfd_vma) 0,
|
||
input_bfd, input_section, rel->r_offset)))
|
||
return false;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* This is a version of bfd_generic_get_relocated_section_contents
|
||
which uses sh_elf_relocate_section. */
|
||
|
||
static bfd_byte *
|
||
sh_elf_get_relocated_section_contents (output_bfd, link_info, link_order,
|
||
data, relocateable, symbols)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *link_info;
|
||
struct bfd_link_order *link_order;
|
||
bfd_byte *data;
|
||
boolean relocateable;
|
||
asymbol **symbols;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf_Internal_Shdr *shndx_hdr;
|
||
asection *input_section = link_order->u.indirect.section;
|
||
bfd *input_bfd = input_section->owner;
|
||
asection **sections = NULL;
|
||
Elf_Internal_Rela *internal_relocs = NULL;
|
||
Elf32_External_Sym *external_syms = NULL;
|
||
Elf_External_Sym_Shndx *shndx_buf = NULL;
|
||
Elf_External_Sym_Shndx *shndx;
|
||
Elf_Internal_Sym *internal_syms = NULL;
|
||
|
||
/* We only need to handle the case of relaxing, or of having a
|
||
particular set of section contents, specially. */
|
||
if (relocateable
|
||
|| elf_section_data (input_section)->this_hdr.contents == NULL)
|
||
return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
|
||
link_order, data,
|
||
relocateable,
|
||
symbols);
|
||
|
||
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
||
shndx_hdr = &elf_tdata (input_bfd)->symtab_shndx_hdr;
|
||
|
||
memcpy (data, elf_section_data (input_section)->this_hdr.contents,
|
||
(size_t) input_section->_raw_size);
|
||
|
||
if ((input_section->flags & SEC_RELOC) != 0
|
||
&& input_section->reloc_count > 0)
|
||
{
|
||
Elf_Internal_Sym *isymp;
|
||
asection **secpp;
|
||
Elf32_External_Sym *esym, *esymend;
|
||
bfd_size_type amt;
|
||
|
||
if (symtab_hdr->contents != NULL)
|
||
external_syms = (Elf32_External_Sym *) symtab_hdr->contents;
|
||
else if (symtab_hdr->sh_info != 0)
|
||
{
|
||
amt = symtab_hdr->sh_info;
|
||
amt *= sizeof (Elf32_External_Sym);
|
||
external_syms = (Elf32_External_Sym *) bfd_malloc (amt);
|
||
if (external_syms == NULL)
|
||
goto error_return;
|
||
if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|
||
|| bfd_bread ((PTR) external_syms, amt, input_bfd) != amt)
|
||
goto error_return;
|
||
}
|
||
|
||
if (symtab_hdr->sh_info != 0 && shndx_hdr->sh_size != 0)
|
||
{
|
||
amt = symtab_hdr->sh_info;
|
||
amt *= sizeof (Elf_External_Sym_Shndx);
|
||
shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
|
||
if (shndx_buf == NULL)
|
||
goto error_return;
|
||
if (bfd_seek (input_bfd, shndx_hdr->sh_offset, SEEK_SET) != 0
|
||
|| bfd_bread ((PTR) shndx_buf, amt, input_bfd) != amt)
|
||
goto error_return;
|
||
}
|
||
|
||
internal_relocs = (_bfd_elf32_link_read_relocs
|
||
(input_bfd, input_section, (PTR) NULL,
|
||
(Elf_Internal_Rela *) NULL, false));
|
||
if (internal_relocs == NULL)
|
||
goto error_return;
|
||
|
||
amt = symtab_hdr->sh_info;
|
||
amt *= sizeof (Elf_Internal_Sym);
|
||
internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt);
|
||
if (internal_syms == NULL && amt != 0)
|
||
goto error_return;
|
||
|
||
amt = symtab_hdr->sh_info;
|
||
amt *= sizeof (asection *);
|
||
sections = (asection **) bfd_malloc (amt);
|
||
if (sections == NULL && amt != 0)
|
||
goto error_return;
|
||
|
||
for (isymp = internal_syms, secpp = sections, shndx = shndx_buf,
|
||
esym = external_syms, esymend = esym + symtab_hdr->sh_info;
|
||
esym < esymend;
|
||
++esym, ++isymp, ++secpp, shndx = (shndx ? shndx + 1 : NULL))
|
||
{
|
||
asection *isec;
|
||
|
||
bfd_elf32_swap_symbol_in (input_bfd, esym, shndx, isymp);
|
||
|
||
if (isymp->st_shndx == SHN_UNDEF)
|
||
isec = bfd_und_section_ptr;
|
||
else if (isymp->st_shndx == SHN_ABS)
|
||
isec = bfd_abs_section_ptr;
|
||
else if (isymp->st_shndx == SHN_COMMON)
|
||
isec = bfd_com_section_ptr;
|
||
else
|
||
isec = bfd_section_from_elf_index (input_bfd, isymp->st_shndx);
|
||
|
||
*secpp = isec;
|
||
}
|
||
|
||
if (! sh_elf_relocate_section (output_bfd, link_info, input_bfd,
|
||
input_section, data, internal_relocs,
|
||
internal_syms, sections))
|
||
goto error_return;
|
||
|
||
if (sections != NULL)
|
||
free (sections);
|
||
if (internal_syms != NULL)
|
||
free (internal_syms);
|
||
if (shndx_buf != NULL)
|
||
free (shndx_buf);
|
||
if (external_syms != NULL && symtab_hdr->contents == NULL)
|
||
free (external_syms);
|
||
if (internal_relocs != elf_section_data (input_section)->relocs)
|
||
free (internal_relocs);
|
||
}
|
||
|
||
return data;
|
||
|
||
error_return:
|
||
if (internal_relocs != NULL
|
||
&& internal_relocs != elf_section_data (input_section)->relocs)
|
||
free (internal_relocs);
|
||
if (shndx_buf != NULL)
|
||
free (shndx_buf);
|
||
if (external_syms != NULL && symtab_hdr->contents == NULL)
|
||
free (external_syms);
|
||
if (internal_syms != NULL)
|
||
free (internal_syms);
|
||
if (sections != NULL)
|
||
free (sections);
|
||
return NULL;
|
||
}
|
||
|
||
static asection *
|
||
sh_elf_gc_mark_hook (abfd, info, rel, h, sym)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
||
Elf_Internal_Rela *rel;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *sym;
|
||
{
|
||
if (h != NULL)
|
||
{
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_SH_GNU_VTINHERIT:
|
||
case R_SH_GNU_VTENTRY:
|
||
break;
|
||
|
||
default:
|
||
switch (h->root.type)
|
||
{
|
||
case bfd_link_hash_defined:
|
||
case bfd_link_hash_defweak:
|
||
return h->root.u.def.section;
|
||
|
||
case bfd_link_hash_common:
|
||
return h->root.u.c.p->section;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
return bfd_section_from_elf_index (abfd, sym->st_shndx);
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Update the got entry reference counts for the section being removed. */
|
||
|
||
static boolean
|
||
sh_elf_gc_sweep_hook (abfd, info, sec, relocs)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
||
asection *sec ATTRIBUTE_UNUSED;
|
||
const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
|
||
{
|
||
/* We use got and plt entries for sh, but it would seem that the
|
||
existing SH code does no sort of reference counting or whatnot on
|
||
its GOT and PLT entries, so it is not possible to garbage collect
|
||
them at this time. */
|
||
return true;
|
||
}
|
||
|
||
/* Look through the relocs for a section during the first phase.
|
||
Since we don't do .gots or .plts, we just need to consider the
|
||
virtual table relocs for gc. */
|
||
|
||
static boolean
|
||
sh_elf_check_relocs (abfd, info, sec, relocs)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
asection *sec;
|
||
const Elf_Internal_Rela *relocs;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
|
||
const Elf_Internal_Rela *rel;
|
||
const Elf_Internal_Rela *rel_end;
|
||
bfd *dynobj;
|
||
bfd_vma *local_got_offsets;
|
||
asection *sgot;
|
||
asection *srelgot;
|
||
asection *sreloc;
|
||
|
||
sgot = NULL;
|
||
srelgot = NULL;
|
||
sreloc = NULL;
|
||
|
||
if (info->relocateable)
|
||
return true;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
|
||
if (!elf_bad_symtab (abfd))
|
||
sym_hashes_end -= symtab_hdr->sh_info;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
local_got_offsets = elf_local_got_offsets (abfd);
|
||
|
||
rel_end = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < rel_end; rel++)
|
||
{
|
||
struct elf_link_hash_entry *h;
|
||
unsigned long r_symndx;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
h = NULL;
|
||
else
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
|
||
/* Some relocs require a global offset table. */
|
||
if (dynobj == NULL)
|
||
{
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_SH_GOT32:
|
||
case R_SH_GOTOFF:
|
||
case R_SH_GOTPC:
|
||
elf_hash_table (info)->dynobj = dynobj = abfd;
|
||
if (! _bfd_elf_create_got_section (dynobj, info))
|
||
return false;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
/* This relocation describes the C++ object vtable hierarchy.
|
||
Reconstruct it for later use during GC. */
|
||
case R_SH_GNU_VTINHERIT:
|
||
if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
||
return false;
|
||
break;
|
||
|
||
/* This relocation describes which C++ vtable entries are actually
|
||
used. Record for later use during GC. */
|
||
case R_SH_GNU_VTENTRY:
|
||
if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
||
return false;
|
||
break;
|
||
|
||
case R_SH_GOT32:
|
||
/* This symbol requires a global offset table entry. */
|
||
|
||
if (sgot == NULL)
|
||
{
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != NULL);
|
||
}
|
||
|
||
if (srelgot == NULL
|
||
&& (h != NULL || info->shared))
|
||
{
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
if (srelgot == NULL)
|
||
{
|
||
srelgot = bfd_make_section (dynobj, ".rela.got");
|
||
if (srelgot == NULL
|
||
|| ! bfd_set_section_flags (dynobj, srelgot,
|
||
(SEC_ALLOC
|
||
| SEC_LOAD
|
||
| SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED
|
||
| SEC_READONLY))
|
||
|| ! bfd_set_section_alignment (dynobj, srelgot, 2))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if (h != NULL)
|
||
{
|
||
if (h->got.offset != (bfd_vma) -1)
|
||
{
|
||
/* We have already allocated space in the .got. */
|
||
break;
|
||
}
|
||
h->got.offset = sgot->_raw_size;
|
||
|
||
/* Make sure this symbol is output as a dynamic symbol. */
|
||
if (h->dynindx == -1)
|
||
{
|
||
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
|
||
return false;
|
||
}
|
||
|
||
srelgot->_raw_size += sizeof (Elf32_External_Rela);
|
||
}
|
||
else
|
||
{
|
||
/* This is a global offset table entry for a local
|
||
symbol. */
|
||
if (local_got_offsets == NULL)
|
||
{
|
||
bfd_size_type size;
|
||
register unsigned int i;
|
||
|
||
size = symtab_hdr->sh_info;
|
||
size *= sizeof (bfd_vma);
|
||
local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
|
||
if (local_got_offsets == NULL)
|
||
return false;
|
||
elf_local_got_offsets (abfd) = local_got_offsets;
|
||
for (i = 0; i < symtab_hdr->sh_info; i++)
|
||
local_got_offsets[i] = (bfd_vma) -1;
|
||
}
|
||
if (local_got_offsets[r_symndx] != (bfd_vma) -1)
|
||
{
|
||
/* We have already allocated space in the .got. */
|
||
break;
|
||
}
|
||
local_got_offsets[r_symndx] = sgot->_raw_size;
|
||
|
||
if (info->shared)
|
||
{
|
||
/* If we are generating a shared object, we need to
|
||
output a R_SH_RELATIVE reloc so that the dynamic
|
||
linker can adjust this GOT entry. */
|
||
srelgot->_raw_size += sizeof (Elf32_External_Rela);
|
||
}
|
||
}
|
||
|
||
sgot->_raw_size += 4;
|
||
|
||
break;
|
||
|
||
case R_SH_PLT32:
|
||
/* This symbol requires a procedure linkage table entry. We
|
||
actually build the entry in adjust_dynamic_symbol,
|
||
because this might be a case of linking PIC code which is
|
||
never referenced by a dynamic object, in which case we
|
||
don't need to generate a procedure linkage table entry
|
||
after all. */
|
||
|
||
/* If this is a local symbol, we resolve it directly without
|
||
creating a procedure linkage table entry. */
|
||
if (h == NULL)
|
||
continue;
|
||
|
||
if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
|
||
|| ELF_ST_VISIBILITY (h->other) == STV_HIDDEN)
|
||
break;
|
||
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
|
||
|
||
break;
|
||
|
||
case R_SH_DIR32:
|
||
case R_SH_REL32:
|
||
if (h != NULL)
|
||
h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
|
||
|
||
/* If we are creating a shared library, and this is a reloc
|
||
against a global symbol, or a non PC relative reloc
|
||
against a local symbol, then we need to copy the reloc
|
||
into the shared library. However, if we are linking with
|
||
-Bsymbolic, we do not need to copy a reloc against a
|
||
global symbol which is defined in an object we are
|
||
including in the link (i.e., DEF_REGULAR is set). At
|
||
this point we have not seen all the input files, so it is
|
||
possible that DEF_REGULAR is not set now but will be set
|
||
later (it is never cleared). We account for that
|
||
possibility below by storing information in the
|
||
pcrel_relocs_copied field of the hash table entry. */
|
||
if (info->shared
|
||
&& (sec->flags & SEC_ALLOC) != 0
|
||
&& (ELF32_R_TYPE (rel->r_info) != R_SH_REL32
|
||
|| (h != NULL
|
||
&& (! info->symbolic
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|
||
{
|
||
/* When creating a shared object, we must copy these
|
||
reloc types into the output file. We create a reloc
|
||
section in dynobj and make room for this reloc. */
|
||
if (sreloc == NULL)
|
||
{
|
||
const char *name;
|
||
|
||
name = (bfd_elf_string_from_elf_section
|
||
(abfd,
|
||
elf_elfheader (abfd)->e_shstrndx,
|
||
elf_section_data (sec)->rel_hdr.sh_name));
|
||
if (name == NULL)
|
||
return false;
|
||
|
||
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
|
||
&& strcmp (bfd_get_section_name (abfd, sec),
|
||
name + 5) == 0);
|
||
|
||
sreloc = bfd_get_section_by_name (dynobj, name);
|
||
if (sreloc == NULL)
|
||
{
|
||
flagword flags;
|
||
|
||
sreloc = bfd_make_section (dynobj, name);
|
||
flags = (SEC_HAS_CONTENTS | SEC_READONLY
|
||
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
||
if ((sec->flags & SEC_ALLOC) != 0)
|
||
flags |= SEC_ALLOC | SEC_LOAD;
|
||
if (sreloc == NULL
|
||
|| ! bfd_set_section_flags (dynobj, sreloc, flags)
|
||
|| ! bfd_set_section_alignment (dynobj, sreloc, 2))
|
||
return false;
|
||
}
|
||
if (sec->flags & SEC_READONLY)
|
||
info->flags |= DF_TEXTREL;
|
||
}
|
||
|
||
sreloc->_raw_size += sizeof (Elf32_External_Rela);
|
||
|
||
/* If we are linking with -Bsymbolic, and this is a
|
||
global symbol, we count the number of PC relative
|
||
relocations we have entered for this symbol, so that
|
||
we can discard them again if the symbol is later
|
||
defined by a regular object. Note that this function
|
||
is only called if we are using an elf_sh linker
|
||
hash table, which means that h is really a pointer to
|
||
an elf_sh_link_hash_entry. */
|
||
if (h != NULL && info->symbolic
|
||
&& ELF32_R_TYPE (rel->r_info) == R_SH_REL32)
|
||
{
|
||
struct elf_sh_link_hash_entry *eh;
|
||
struct elf_sh_pcrel_relocs_copied *p;
|
||
|
||
eh = (struct elf_sh_link_hash_entry *) h;
|
||
|
||
for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
|
||
if (p->section == sreloc)
|
||
break;
|
||
|
||
if (p == NULL)
|
||
{
|
||
p = ((struct elf_sh_pcrel_relocs_copied *)
|
||
bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
|
||
if (p == NULL)
|
||
return false;
|
||
p->next = eh->pcrel_relocs_copied;
|
||
eh->pcrel_relocs_copied = p;
|
||
p->section = sreloc;
|
||
p->count = 0;
|
||
}
|
||
|
||
++p->count;
|
||
}
|
||
}
|
||
|
||
break;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
static boolean
|
||
sh_elf_set_mach_from_flags (abfd)
|
||
bfd *abfd;
|
||
{
|
||
flagword flags = elf_elfheader (abfd)->e_flags;
|
||
|
||
switch (flags & EF_SH_MACH_MASK)
|
||
{
|
||
case EF_SH1:
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh);
|
||
break;
|
||
case EF_SH2:
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh2);
|
||
break;
|
||
case EF_SH_DSP:
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh_dsp);
|
||
break;
|
||
case EF_SH3:
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh3);
|
||
break;
|
||
case EF_SH3_DSP:
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh3_dsp);
|
||
break;
|
||
case EF_SH3E:
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh3e);
|
||
break;
|
||
case EF_SH_UNKNOWN:
|
||
case EF_SH4:
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh4);
|
||
break;
|
||
default:
|
||
return false;
|
||
}
|
||
return true;
|
||
}
|
||
|
||
/* Function to keep SH specific file flags. */
|
||
|
||
static boolean
|
||
sh_elf_set_private_flags (abfd, flags)
|
||
bfd *abfd;
|
||
flagword flags;
|
||
{
|
||
BFD_ASSERT (! elf_flags_init (abfd)
|
||
|| elf_elfheader (abfd)->e_flags == flags);
|
||
|
||
elf_elfheader (abfd)->e_flags = flags;
|
||
elf_flags_init (abfd) = true;
|
||
return sh_elf_set_mach_from_flags (abfd);
|
||
}
|
||
|
||
/* Copy backend specific data from one object module to another */
|
||
|
||
static boolean
|
||
sh_elf_copy_private_data (ibfd, obfd)
|
||
bfd * ibfd;
|
||
bfd * obfd;
|
||
{
|
||
if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
return sh_elf_set_private_flags (obfd, elf_elfheader (ibfd)->e_flags);
|
||
}
|
||
|
||
/* This routine checks for linking big and little endian objects
|
||
together, and for linking sh-dsp with sh3e / sh4 objects. */
|
||
|
||
static boolean
|
||
sh_elf_merge_private_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
flagword old_flags, new_flags;
|
||
|
||
if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
|
||
return false;
|
||
|
||
if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
if (! elf_flags_init (obfd))
|
||
{
|
||
/* This happens when ld starts out with a 'blank' output file. */
|
||
elf_flags_init (obfd) = true;
|
||
elf_elfheader (obfd)->e_flags = EF_SH1;
|
||
}
|
||
old_flags = elf_elfheader (obfd)->e_flags;
|
||
new_flags = elf_elfheader (ibfd)->e_flags;
|
||
if ((EF_SH_HAS_DSP (old_flags) && EF_SH_HAS_FP (new_flags))
|
||
|| (EF_SH_HAS_DSP (new_flags) && EF_SH_HAS_FP (old_flags)))
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: uses %s instructions while previous modules use %s instructions",
|
||
bfd_archive_filename (ibfd),
|
||
EF_SH_HAS_DSP (new_flags) ? "dsp" : "floating point",
|
||
EF_SH_HAS_DSP (new_flags) ? "floating point" : "dsp");
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
elf_elfheader (obfd)->e_flags = EF_SH_MERGE_MACH (old_flags, new_flags);
|
||
|
||
return sh_elf_set_mach_from_flags (obfd);
|
||
}
|
||
|
||
/* Finish up dynamic symbol handling. We set the contents of various
|
||
dynamic sections here. */
|
||
|
||
static boolean
|
||
sh_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *sym;
|
||
{
|
||
bfd *dynobj;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
if (h->plt.offset != (bfd_vma) -1)
|
||
{
|
||
asection *splt;
|
||
asection *sgot;
|
||
asection *srel;
|
||
|
||
bfd_vma plt_index;
|
||
bfd_vma got_offset;
|
||
Elf_Internal_Rela rel;
|
||
|
||
/* This symbol has an entry in the procedure linkage table. Set
|
||
it up. */
|
||
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
|
||
srel = bfd_get_section_by_name (dynobj, ".rela.plt");
|
||
BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
|
||
|
||
/* Get the index in the procedure linkage table which
|
||
corresponds to this symbol. This is the index of this symbol
|
||
in all the symbols for which we are making plt entries. The
|
||
first entry in the procedure linkage table is reserved. */
|
||
plt_index = h->plt.offset / elf_sh_sizeof_plt (info) - 1;
|
||
|
||
/* Get the offset into the .got table of the entry that
|
||
corresponds to this function. Each .got entry is 4 bytes.
|
||
The first three are reserved. */
|
||
got_offset = (plt_index + 3) * 4;
|
||
|
||
/* Fill in the entry in the procedure linkage table. */
|
||
if (! info->shared)
|
||
{
|
||
if (elf_sh_plt_entry == NULL)
|
||
{
|
||
elf_sh_plt_entry = (bfd_big_endian (output_bfd) ?
|
||
elf_sh_plt_entry_be : elf_sh_plt_entry_le);
|
||
}
|
||
memcpy (splt->contents + h->plt.offset, elf_sh_plt_entry,
|
||
elf_sh_sizeof_plt (info));
|
||
bfd_put_32 (output_bfd,
|
||
(sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ got_offset),
|
||
(splt->contents + h->plt.offset
|
||
+ elf_sh_plt_symbol_offset (info)));
|
||
|
||
bfd_put_32 (output_bfd,
|
||
(splt->output_section->vma + splt->output_offset),
|
||
(splt->contents + h->plt.offset
|
||
+ elf_sh_plt_plt0_offset (info)));
|
||
}
|
||
else
|
||
{
|
||
if (elf_sh_pic_plt_entry == NULL)
|
||
{
|
||
elf_sh_pic_plt_entry = (bfd_big_endian (output_bfd) ?
|
||
elf_sh_pic_plt_entry_be :
|
||
elf_sh_pic_plt_entry_le);
|
||
}
|
||
memcpy (splt->contents + h->plt.offset, elf_sh_pic_plt_entry,
|
||
elf_sh_sizeof_plt (info));
|
||
bfd_put_32 (output_bfd, got_offset,
|
||
(splt->contents + h->plt.offset
|
||
+ elf_sh_plt_symbol_offset (info)));
|
||
}
|
||
|
||
bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
|
||
(splt->contents + h->plt.offset
|
||
+ elf_sh_plt_reloc_offset (info)));
|
||
|
||
/* Fill in the entry in the global offset table. */
|
||
bfd_put_32 (output_bfd,
|
||
(splt->output_section->vma
|
||
+ splt->output_offset
|
||
+ h->plt.offset
|
||
+ elf_sh_plt_temp_offset (info)),
|
||
sgot->contents + got_offset);
|
||
|
||
/* Fill in the entry in the .rela.plt section. */
|
||
rel.r_offset = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ got_offset);
|
||
rel.r_info = ELF32_R_INFO (h->dynindx, R_SH_JMP_SLOT);
|
||
rel.r_addend = 0;
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rel,
|
||
((Elf32_External_Rela *) srel->contents
|
||
+ plt_index));
|
||
|
||
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
{
|
||
/* Mark the symbol as undefined, rather than as defined in
|
||
the .plt section. Leave the value alone. */
|
||
sym->st_shndx = SHN_UNDEF;
|
||
}
|
||
}
|
||
|
||
if (h->got.offset != (bfd_vma) -1)
|
||
{
|
||
asection *sgot;
|
||
asection *srel;
|
||
Elf_Internal_Rela rel;
|
||
|
||
/* This symbol has an entry in the global offset table. Set it
|
||
up. */
|
||
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
srel = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
BFD_ASSERT (sgot != NULL && srel != NULL);
|
||
|
||
rel.r_offset = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ (h->got.offset &~ (bfd_vma) 1));
|
||
|
||
/* If this is a -Bsymbolic link, and the symbol is defined
|
||
locally, we just want to emit a RELATIVE reloc. Likewise if
|
||
the symbol was forced to be local because of a version file.
|
||
The entry in the global offset table will already have been
|
||
initialized in the relocate_section function. */
|
||
if (info->shared
|
||
&& (info->symbolic || h->dynindx == -1)
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
|
||
{
|
||
rel.r_info = ELF32_R_INFO (0, R_SH_RELATIVE);
|
||
rel.r_addend = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
}
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
|
||
rel.r_info = ELF32_R_INFO (h->dynindx, R_SH_GLOB_DAT);
|
||
rel.r_addend = 0;
|
||
}
|
||
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rel,
|
||
((Elf32_External_Rela *) srel->contents
|
||
+ srel->reloc_count));
|
||
++srel->reloc_count;
|
||
}
|
||
|
||
if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
|
||
{
|
||
asection *s;
|
||
Elf_Internal_Rela rel;
|
||
|
||
/* This symbol needs a copy reloc. Set it up. */
|
||
|
||
BFD_ASSERT (h->dynindx != -1
|
||
&& (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak));
|
||
|
||
s = bfd_get_section_by_name (h->root.u.def.section->owner,
|
||
".rela.bss");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
rel.r_offset = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
rel.r_info = ELF32_R_INFO (h->dynindx, R_SH_COPY);
|
||
rel.r_addend = 0;
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rel,
|
||
((Elf32_External_Rela *) s->contents
|
||
+ s->reloc_count));
|
||
++s->reloc_count;
|
||
}
|
||
|
||
/* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
|
||
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|
||
|| strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
|
||
sym->st_shndx = SHN_ABS;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Finish up the dynamic sections. */
|
||
|
||
static boolean
|
||
sh_elf_finish_dynamic_sections (output_bfd, info)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd *dynobj;
|
||
asection *sgot;
|
||
asection *sdyn;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
|
||
BFD_ASSERT (sgot != NULL);
|
||
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
asection *splt;
|
||
Elf32_External_Dyn *dyncon, *dynconend;
|
||
|
||
BFD_ASSERT (sdyn != NULL);
|
||
|
||
dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
||
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
|
||
for (; dyncon < dynconend; dyncon++)
|
||
{
|
||
Elf_Internal_Dyn dyn;
|
||
const char *name;
|
||
asection *s;
|
||
|
||
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
||
|
||
switch (dyn.d_tag)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case DT_PLTGOT:
|
||
name = ".got";
|
||
goto get_vma;
|
||
|
||
case DT_JMPREL:
|
||
name = ".rela.plt";
|
||
get_vma:
|
||
s = bfd_get_section_by_name (output_bfd, name);
|
||
BFD_ASSERT (s != NULL);
|
||
dyn.d_un.d_ptr = s->vma;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_PLTRELSZ:
|
||
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
|
||
BFD_ASSERT (s != NULL);
|
||
if (s->_cooked_size != 0)
|
||
dyn.d_un.d_val = s->_cooked_size;
|
||
else
|
||
dyn.d_un.d_val = s->_raw_size;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_RELASZ:
|
||
/* My reading of the SVR4 ABI indicates that the
|
||
procedure linkage table relocs (DT_JMPREL) should be
|
||
included in the overall relocs (DT_RELA). This is
|
||
what Solaris does. However, UnixWare can not handle
|
||
that case. Therefore, we override the DT_RELASZ entry
|
||
here to make it not include the JMPREL relocs. Since
|
||
the linker script arranges for .rela.plt to follow all
|
||
other relocation sections, we don't have to worry
|
||
about changing the DT_RELA entry. */
|
||
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
|
||
if (s != NULL)
|
||
{
|
||
if (s->_cooked_size != 0)
|
||
dyn.d_un.d_val -= s->_cooked_size;
|
||
else
|
||
dyn.d_un.d_val -= s->_raw_size;
|
||
}
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Fill in the first entry in the procedure linkage table. */
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
if (splt && splt->_raw_size > 0)
|
||
{
|
||
if (info->shared)
|
||
{
|
||
if (elf_sh_pic_plt_entry == NULL)
|
||
{
|
||
elf_sh_pic_plt_entry = (bfd_big_endian (output_bfd) ?
|
||
elf_sh_pic_plt_entry_be :
|
||
elf_sh_pic_plt_entry_le);
|
||
}
|
||
memcpy (splt->contents, elf_sh_pic_plt_entry,
|
||
elf_sh_sizeof_plt (info));
|
||
}
|
||
else
|
||
{
|
||
if (elf_sh_plt0_entry == NULL)
|
||
{
|
||
elf_sh_plt0_entry = (bfd_big_endian (output_bfd) ?
|
||
elf_sh_plt0_entry_be :
|
||
elf_sh_plt0_entry_le);
|
||
}
|
||
memcpy (splt->contents, elf_sh_plt0_entry, PLT_ENTRY_SIZE);
|
||
bfd_put_32 (output_bfd,
|
||
sgot->output_section->vma + sgot->output_offset + 4,
|
||
splt->contents + elf_sh_plt0_gotid_offset (info));
|
||
bfd_put_32 (output_bfd,
|
||
sgot->output_section->vma + sgot->output_offset + 8,
|
||
splt->contents + elf_sh_plt0_linker_offset (info));
|
||
}
|
||
|
||
/* UnixWare sets the entsize of .plt to 4, although that doesn't
|
||
really seem like the right value. */
|
||
elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
|
||
}
|
||
}
|
||
|
||
/* Fill in the first three entries in the global offset table. */
|
||
if (sgot->_raw_size > 0)
|
||
{
|
||
if (sdyn == NULL)
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
|
||
else
|
||
bfd_put_32 (output_bfd,
|
||
sdyn->output_section->vma + sdyn->output_offset,
|
||
sgot->contents);
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
|
||
}
|
||
|
||
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
|
||
|
||
return true;
|
||
}
|
||
|
||
static enum elf_reloc_type_class
|
||
sh_elf_reloc_type_class (rela)
|
||
const Elf_Internal_Rela *rela;
|
||
{
|
||
switch ((int) ELF32_R_TYPE (rela->r_info))
|
||
{
|
||
case R_SH_RELATIVE:
|
||
return reloc_class_relative;
|
||
case R_SH_JMP_SLOT:
|
||
return reloc_class_plt;
|
||
case R_SH_COPY:
|
||
return reloc_class_copy;
|
||
default:
|
||
return reloc_class_normal;
|
||
}
|
||
}
|
||
|
||
#ifndef ELF_ARCH
|
||
#define TARGET_BIG_SYM bfd_elf32_sh_vec
|
||
#define TARGET_BIG_NAME "elf32-sh"
|
||
#define TARGET_LITTLE_SYM bfd_elf32_shl_vec
|
||
#define TARGET_LITTLE_NAME "elf32-shl"
|
||
#define ELF_ARCH bfd_arch_sh
|
||
#define ELF_MACHINE_CODE EM_SH
|
||
#define ELF_MAXPAGESIZE 128
|
||
|
||
#define elf_symbol_leading_char '_'
|
||
#endif /* ELF_ARCH */
|
||
|
||
#define bfd_elf32_bfd_reloc_type_lookup sh_elf_reloc_type_lookup
|
||
#define elf_info_to_howto sh_elf_info_to_howto
|
||
#define bfd_elf32_bfd_relax_section sh_elf_relax_section
|
||
#define elf_backend_relocate_section sh_elf_relocate_section
|
||
#define bfd_elf32_bfd_get_relocated_section_contents \
|
||
sh_elf_get_relocated_section_contents
|
||
#define elf_backend_object_p sh_elf_set_mach_from_flags
|
||
#define bfd_elf32_bfd_set_private_bfd_flags \
|
||
sh_elf_set_private_flags
|
||
#define bfd_elf32_bfd_copy_private_bfd_data \
|
||
sh_elf_copy_private_data
|
||
#define bfd_elf32_bfd_merge_private_bfd_data \
|
||
sh_elf_merge_private_data
|
||
|
||
#define elf_backend_gc_mark_hook sh_elf_gc_mark_hook
|
||
#define elf_backend_gc_sweep_hook sh_elf_gc_sweep_hook
|
||
#define elf_backend_check_relocs sh_elf_check_relocs
|
||
|
||
#define elf_backend_can_gc_sections 1
|
||
#define elf_backend_create_dynamic_sections \
|
||
sh_elf_create_dynamic_sections
|
||
#define bfd_elf32_bfd_link_hash_table_create \
|
||
sh_elf_link_hash_table_create
|
||
#define elf_backend_adjust_dynamic_symbol \
|
||
sh_elf_adjust_dynamic_symbol
|
||
#define elf_backend_size_dynamic_sections \
|
||
sh_elf_size_dynamic_sections
|
||
#define elf_backend_finish_dynamic_symbol \
|
||
sh_elf_finish_dynamic_symbol
|
||
#define elf_backend_finish_dynamic_sections \
|
||
sh_elf_finish_dynamic_sections
|
||
#define elf_backend_reloc_type_class sh_elf_reloc_type_class
|
||
|
||
#define elf_backend_want_got_plt 1
|
||
#define elf_backend_plt_readonly 1
|
||
#define elf_backend_want_plt_sym 0
|
||
#define elf_backend_got_header_size 12
|
||
#define elf_backend_plt_header_size PLT_ENTRY_SIZE
|
||
#include "elf32-target.h"
|