bfd/elf32-gen.c

   1 /* Generic support for 32-bit ELF
   2    Copyright (C) 1993-2023 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 #include "sysdep.h"
  22 #include "bfd.h"
  23 #include "libbfd.h"
  24 #include "elf-bfd.h"
  25
  26 /* This does not include any relocation information, but should be
  27    good enough for GDB or objdump to read the file.  */
  28
  29 static reloc_howto_type dummy =
  30   HOWTO (0,                     /* type */
  31          0,                     /* rightshift */
  32          0,                     /* size */
  33          0,                     /* bitsize */
  34          false,                 /* pc_relative */
  35          0,                     /* bitpos */
  36          complain_overflow_dont, /* complain_on_overflow */
  37          NULL,                  /* special_function */
  38          "UNKNOWN",             /* name */
  39          false,                 /* partial_inplace */
  40          0,                     /* src_mask */
  41          0,                     /* dst_mask */
  42          false);                /* pcrel_offset */
  43
  44 static bool
  45 elf_generic_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
  46                            arelent *bfd_reloc,
  47                            Elf_Internal_Rela *elf_reloc ATTRIBUTE_UNUSED)
  48 {
  49   bfd_reloc->howto = &dummy;
  50   return true;
  51 }
  52
  53 static bool
  54 elf_generic_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
  55                                arelent *bfd_reloc,
  56                                Elf_Internal_Rela *elf_reloc ATTRIBUTE_UNUSED)
  57 {
  58   bfd_reloc->howto = &dummy;
  59   return true;
  60 }
  61
  62 static void
  63 check_for_relocs (bfd * abfd, asection * o, void * failed)
  64 {
  65   if ((o->flags & SEC_RELOC) != 0)
  66     {
  67       Elf_Internal_Ehdr *ehdrp;
  68
  69       ehdrp = elf_elfheader (abfd);
  70       /* xgettext:c-format */
  71       _bfd_error_handler (_("%pB: relocations in generic ELF (EM: %d)"),
  72                           abfd, ehdrp->e_machine);
  73
  74       bfd_set_error (bfd_error_wrong_format);
  75       * (bool *) failed = true;
  76     }
  77 }
  78
  79 static bool
  80 elf32_generic_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
  81 {
  82   bool failed = false;
  83
  84   /* Check if there are any relocations.  */
  85   bfd_map_over_sections (abfd, check_for_relocs, & failed);
  86
  87   if (failed)
  88     return false;
  89   return bfd_elf_link_add_symbols (abfd, info);
  90 }
  91
  92 #define TARGET_LITTLE_SYM               elf32_le_vec
  93 #define TARGET_LITTLE_NAME              "elf32-little"
  94 #define TARGET_BIG_SYM                  elf32_be_vec
  95 #define TARGET_BIG_NAME                 "elf32-big"
  96 #define ELF_ARCH                        bfd_arch_unknown
  97 #define ELF_MACHINE_CODE                EM_NONE
  98 #define ELF_MAXPAGESIZE                 0x1
  99 #define bfd_elf32_bfd_reloc_type_lookup bfd_default_reloc_type_lookup
 100 #define bfd_elf32_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
 101 #define bfd_elf32_bfd_link_add_symbols  elf32_generic_link_add_symbols
 102 #define elf_info_to_howto               elf_generic_info_to_howto
 103 #define elf_info_to_howto_rel           elf_generic_info_to_howto_rel
 104
 105 #include "elf32-target.h"