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      1 /* BFD back-end for Intel/AMD x86_64 PECOFF files.
      2    Copyright (C) 2006-2024 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"
    105