1 /* Generic support for 32-bit ELF
2    Copyright (C) 1993-2016 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 (0 = byte, 1 = short, 2 = long) */
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 void
elf_generic_info_to_howto(bfd * abfd ATTRIBUTE_UNUSED,arelent * bfd_reloc,Elf_Internal_Rela * elf_reloc ATTRIBUTE_UNUSED)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 }
51 
52 static void
elf_generic_info_to_howto_rel(bfd * abfd ATTRIBUTE_UNUSED,arelent * bfd_reloc,Elf_Internal_Rela * elf_reloc ATTRIBUTE_UNUSED)53 elf_generic_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
54 			       arelent *bfd_reloc,
55 			       Elf_Internal_Rela *elf_reloc ATTRIBUTE_UNUSED)
56 {
57   bfd_reloc->howto = &dummy;
58 }
59 
60 static void
check_for_relocs(bfd * abfd,asection * o,void * failed)61 check_for_relocs (bfd * abfd, asection * o, void * failed)
62 {
63   if ((o->flags & SEC_RELOC) != 0)
64     {
65       Elf_Internal_Ehdr *ehdrp;
66 
67       ehdrp = elf_elfheader (abfd);
68       _bfd_error_handler (_("%B: Relocations in generic ELF (EM: %d)"),
69 			  abfd, ehdrp->e_machine);
70 
71       bfd_set_error (bfd_error_wrong_format);
72       * (bfd_boolean *) failed = TRUE;
73     }
74 }
75 
76 static bfd_boolean
elf32_generic_link_add_symbols(bfd * abfd,struct bfd_link_info * info)77 elf32_generic_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
78 {
79   bfd_boolean failed = FALSE;
80 
81   /* Check if there are any relocations.  */
82   bfd_map_over_sections (abfd, check_for_relocs, & failed);
83 
84   if (failed)
85     return FALSE;
86   return bfd_elf_link_add_symbols (abfd, info);
87 }
88 
89 #define TARGET_LITTLE_SYM		elf32_le_vec
90 #define TARGET_LITTLE_NAME		"elf32-little"
91 #define TARGET_BIG_SYM			elf32_be_vec
92 #define TARGET_BIG_NAME			"elf32-big"
93 #define ELF_ARCH			bfd_arch_unknown
94 #define ELF_MACHINE_CODE		EM_NONE
95 #define ELF_MAXPAGESIZE			0x1
96 #define bfd_elf32_bfd_reloc_type_lookup bfd_default_reloc_type_lookup
97 #define bfd_elf32_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
98 #define bfd_elf32_bfd_link_add_symbols	elf32_generic_link_add_symbols
99 #define elf_info_to_howto		elf_generic_info_to_howto
100 #define elf_info_to_howto_rel		elf_generic_info_to_howto_rel
101 
102 #include "elf32-target.h"
103