bfd/pe-x86_64.c

   1 /* BFD back-end for Intel/AMD x86_64 PECOFF files.
   2    Copyright (C) 2006-2023 Free Software Foundation, Inc.
   3
   4    This file is part of BFD, the Binary File Descriptor library.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  19    MA 02110-1301, USA.
  20
  21    Written by Kai Tietz, OneVision Software GmbH&CoKg.  */
  22
  23 #include "sysdep.h"
  24 #include "bfd.h"
  25 #include "libbfd.h"
  26 #include "libiberty.h"
  27 #include "coff/x86_64.h"
  28 #include "coff/internal.h"
  29 #include "coff/pe.h"
  30 #include "libcoff.h"
  31
  32 #define TARGET_SYM              x86_64_pe_vec
  33 #define TARGET_NAME             "pe-x86-64"
  34 #define TARGET_SYM_BIG          x86_64_pe_big_vec
  35 #define TARGET_NAME_BIG         "pe-bigobj-x86-64"
  36 #define COFF_WITH_PE
  37 #define COFF_WITH_pex64
  38 #define COFF_WITH_PE_BIGOBJ
  39 #define PCRELOFFSET             true
  40 #if defined (USE_MINGW64_LEADING_UNDERSCORES)
  41 #define TARGET_UNDERSCORE       '_'
  42 #else
  43 #define TARGET_UNDERSCORE       0
  44 #endif
  45 #define COFF_LONG_SECTION_NAMES
  46 #define COFF_SUPPORT_GNU_LINKONCE
  47 #define COFF_LONG_FILENAMES
  48
  49 #define COFF_SECTION_ALIGNMENT_ENTRIES \
  50 { COFF_SECTION_NAME_EXACT_MATCH (".bss"), \
  51   COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
  52 { COFF_SECTION_NAME_PARTIAL_MATCH (".data"), \
  53   COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
  54 { COFF_SECTION_NAME_PARTIAL_MATCH (".rdata"), \
  55   COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
  56 { COFF_SECTION_NAME_PARTIAL_MATCH (".text"), \
  57   COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 4 }, \
  58 { COFF_SECTION_NAME_PARTIAL_MATCH (".idata"), \
  59   COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 2 }, \
  60 { COFF_SECTION_NAME_EXACT_MATCH (".pdata"), \
  61   COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 2 }, \
  62 { COFF_SECTION_NAME_PARTIAL_MATCH (".debug"), \
  63   COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 }, \
  64 { COFF_SECTION_NAME_PARTIAL_MATCH (".zdebug"), \
  65   COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 }, \
  66 { COFF_SECTION_NAME_PARTIAL_MATCH (".gnu.linkonce.wi."), \
  67   COFF_ALIGNMENT_FIELD_EMPTY, COFF_ALIGNMENT_FIELD_EMPTY, 0 }
  68
  69 /* The function pex64_bfd_print_pdata is implemented in pei-x86_64.c
  70    source, but has be extended to also handle pe objects.  */
  71 extern bool pex64_bfd_print_pdata (bfd *, void *);
  72
  73 #define bfd_pe_print_pdata   pex64_bfd_print_pdata
  74
  75 static bool
  76 pex64_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
  77 {
  78   if (bfd_link_pde (info)
  79       && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
  80     {
  81       /* NB: When linking Windows x86-64 relocatable object files to
  82          generate ELF executable, create an indirect reference to
  83          __executable_start for __ImageBase to support R_AMD64_IMAGEBASE
  84          relocation which is relative to __ImageBase.  */
  85       struct bfd_link_hash_entry *h, *hi;
  86       hi = bfd_link_hash_lookup (info->hash, "__ImageBase", true, false,
  87                                  false);
  88       if (hi->type == bfd_link_hash_new
  89           || hi->type == bfd_link_hash_undefined
  90           || hi->type == bfd_link_hash_undefweak)
  91         {
  92           h = bfd_link_hash_lookup (info->hash, "__executable_start",
  93                                     true, false, true);
  94           hi->type = bfd_link_hash_indirect;
  95           hi->u.i.link = h;
  96         }
  97     }
  98
  99   return _bfd_coff_link_add_symbols (abfd, info);
 100 }
 101
 102 #define coff_bfd_link_add_symbols pex64_link_add_symbols
 103
 104 #include "coff-x86_64.c"