| 1 |
1624 |
jcastillo |
/* ELF support for BFD.
|
| 2 |
|
|
Copyright (C) 1991, 1992 Free Software Foundation, Inc.
|
| 3 |
|
|
|
| 4 |
|
|
Written by Fred Fish @ Cygnus Support, from information published
|
| 5 |
|
|
in "UNIX System V Release 4, Programmers Guide: ANSI C and
|
| 6 |
|
|
Programming Support Tools".
|
| 7 |
|
|
|
| 8 |
|
|
This file is part of BFD, the Binary File Descriptor library.
|
| 9 |
|
|
|
| 10 |
|
|
This program is free software; you can redistribute it and/or modify
|
| 11 |
|
|
it under the terms of the GNU General Public License as published by
|
| 12 |
|
|
the Free Software Foundation; either version 2 of the License, or
|
| 13 |
|
|
(at your option) any later version.
|
| 14 |
|
|
|
| 15 |
|
|
This program is distributed in the hope that it will be useful,
|
| 16 |
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 17 |
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| 18 |
|
|
GNU General Public License for more details.
|
| 19 |
|
|
|
| 20 |
|
|
You should have received a copy of the GNU General Public License
|
| 21 |
|
|
along with this program; if not, write to the Free Software
|
| 22 |
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
| 23 |
|
|
|
| 24 |
|
|
|
| 25 |
|
|
/* This file is part of ELF support for BFD, and contains the portions
|
| 26 |
|
|
that describe how ELF is represented externally by the BFD library.
|
| 27 |
|
|
I.E. it describes the in-file representation of ELF. It requires
|
| 28 |
|
|
the elf-common.h file which contains the portions that are common to
|
| 29 |
|
|
both the internal and external representations. */
|
| 30 |
|
|
|
| 31 |
|
|
/* The 64-bit stuff is kind of random. Perhaps someone will publish a
|
| 32 |
|
|
spec someday. */
|
| 33 |
|
|
|
| 34 |
|
|
/* ELF Header (32-bit implementations) */
|
| 35 |
|
|
|
| 36 |
|
|
typedef struct {
|
| 37 |
|
|
unsigned char e_ident[16]; /* ELF "magic number" */
|
| 38 |
|
|
unsigned char e_type[2]; /* Identifies object file type */
|
| 39 |
|
|
unsigned char e_machine[2]; /* Specifies required architecture */
|
| 40 |
|
|
unsigned char e_version[4]; /* Identifies object file version */
|
| 41 |
|
|
unsigned char e_entry[4]; /* Entry point virtual address */
|
| 42 |
|
|
unsigned char e_phoff[4]; /* Program header table file offset */
|
| 43 |
|
|
unsigned char e_shoff[4]; /* Section header table file offset */
|
| 44 |
|
|
unsigned char e_flags[4]; /* Processor-specific flags */
|
| 45 |
|
|
unsigned char e_ehsize[2]; /* ELF header size in bytes */
|
| 46 |
|
|
unsigned char e_phentsize[2]; /* Program header table entry size */
|
| 47 |
|
|
unsigned char e_phnum[2]; /* Program header table entry count */
|
| 48 |
|
|
unsigned char e_shentsize[2]; /* Section header table entry size */
|
| 49 |
|
|
unsigned char e_shnum[2]; /* Section header table entry count */
|
| 50 |
|
|
unsigned char e_shstrndx[2]; /* Section header string table index */
|
| 51 |
|
|
} Elf32_External_Ehdr;
|
| 52 |
|
|
|
| 53 |
|
|
typedef struct {
|
| 54 |
|
|
unsigned char e_ident[16]; /* ELF "magic number" */
|
| 55 |
|
|
unsigned char e_type[2]; /* Identifies object file type */
|
| 56 |
|
|
unsigned char e_machine[2]; /* Specifies required architecture */
|
| 57 |
|
|
unsigned char e_version[4]; /* Identifies object file version */
|
| 58 |
|
|
unsigned char e_entry[8]; /* Entry point virtual address */
|
| 59 |
|
|
unsigned char e_phoff[8]; /* Program header table file offset */
|
| 60 |
|
|
unsigned char e_shoff[8]; /* Section header table file offset */
|
| 61 |
|
|
unsigned char e_flags[4]; /* Processor-specific flags */
|
| 62 |
|
|
unsigned char e_ehsize[2]; /* ELF header size in bytes */
|
| 63 |
|
|
unsigned char e_phentsize[2]; /* Program header table entry size */
|
| 64 |
|
|
unsigned char e_phnum[2]; /* Program header table entry count */
|
| 65 |
|
|
unsigned char e_shentsize[2]; /* Section header table entry size */
|
| 66 |
|
|
unsigned char e_shnum[2]; /* Section header table entry count */
|
| 67 |
|
|
unsigned char e_shstrndx[2]; /* Section header string table index */
|
| 68 |
|
|
} Elf64_External_Ehdr;
|
| 69 |
|
|
|
| 70 |
|
|
/* Program header */
|
| 71 |
|
|
|
| 72 |
|
|
typedef struct {
|
| 73 |
|
|
unsigned char p_type[4]; /* Identifies program segment type */
|
| 74 |
|
|
unsigned char p_offset[4]; /* Segment file offset */
|
| 75 |
|
|
unsigned char p_vaddr[4]; /* Segment virtual address */
|
| 76 |
|
|
unsigned char p_paddr[4]; /* Segment physical address */
|
| 77 |
|
|
unsigned char p_filesz[4]; /* Segment size in file */
|
| 78 |
|
|
unsigned char p_memsz[4]; /* Segment size in memory */
|
| 79 |
|
|
unsigned char p_flags[4]; /* Segment flags */
|
| 80 |
|
|
unsigned char p_align[4]; /* Segment alignment, file & memory */
|
| 81 |
|
|
} Elf32_External_Phdr;
|
| 82 |
|
|
|
| 83 |
|
|
typedef struct {
|
| 84 |
|
|
unsigned char p_type[4]; /* Identifies program segment type */
|
| 85 |
|
|
unsigned char p_flags[4]; /* Segment flags */
|
| 86 |
|
|
unsigned char p_offset[8]; /* Segment file offset */
|
| 87 |
|
|
unsigned char p_vaddr[8]; /* Segment virtual address */
|
| 88 |
|
|
unsigned char p_paddr[8]; /* Segment physical address */
|
| 89 |
|
|
unsigned char p_filesz[8]; /* Segment size in file */
|
| 90 |
|
|
unsigned char p_memsz[8]; /* Segment size in memory */
|
| 91 |
|
|
unsigned char p_align[8]; /* Segment alignment, file & memory */
|
| 92 |
|
|
} Elf64_External_Phdr;
|
| 93 |
|
|
|
| 94 |
|
|
/* Section header */
|
| 95 |
|
|
|
| 96 |
|
|
typedef struct {
|
| 97 |
|
|
unsigned char sh_name[4]; /* Section name, index in string tbl */
|
| 98 |
|
|
unsigned char sh_type[4]; /* Type of section */
|
| 99 |
|
|
unsigned char sh_flags[4]; /* Miscellaneous section attributes */
|
| 100 |
|
|
unsigned char sh_addr[4]; /* Section virtual addr at execution */
|
| 101 |
|
|
unsigned char sh_offset[4]; /* Section file offset */
|
| 102 |
|
|
unsigned char sh_size[4]; /* Size of section in bytes */
|
| 103 |
|
|
unsigned char sh_link[4]; /* Index of another section */
|
| 104 |
|
|
unsigned char sh_info[4]; /* Additional section information */
|
| 105 |
|
|
unsigned char sh_addralign[4]; /* Section alignment */
|
| 106 |
|
|
unsigned char sh_entsize[4]; /* Entry size if section holds table */
|
| 107 |
|
|
} Elf32_External_Shdr;
|
| 108 |
|
|
|
| 109 |
|
|
typedef struct {
|
| 110 |
|
|
unsigned char sh_name[4]; /* Section name, index in string tbl */
|
| 111 |
|
|
unsigned char sh_type[4]; /* Type of section */
|
| 112 |
|
|
unsigned char sh_flags[8]; /* Miscellaneous section attributes */
|
| 113 |
|
|
unsigned char sh_addr[8]; /* Section virtual addr at execution */
|
| 114 |
|
|
unsigned char sh_offset[8]; /* Section file offset */
|
| 115 |
|
|
unsigned char sh_size[8]; /* Size of section in bytes */
|
| 116 |
|
|
unsigned char sh_link[4]; /* Index of another section */
|
| 117 |
|
|
unsigned char sh_info[4]; /* Additional section information */
|
| 118 |
|
|
unsigned char sh_addralign[8]; /* Section alignment */
|
| 119 |
|
|
unsigned char sh_entsize[8]; /* Entry size if section holds table */
|
| 120 |
|
|
} Elf64_External_Shdr;
|
| 121 |
|
|
|
| 122 |
|
|
/* Symbol table entry */
|
| 123 |
|
|
|
| 124 |
|
|
typedef struct {
|
| 125 |
|
|
unsigned char st_name[4]; /* Symbol name, index in string tbl */
|
| 126 |
|
|
unsigned char st_value[4]; /* Value of the symbol */
|
| 127 |
|
|
unsigned char st_size[4]; /* Associated symbol size */
|
| 128 |
|
|
unsigned char st_info[1]; /* Type and binding attributes */
|
| 129 |
|
|
unsigned char st_other[1]; /* No defined meaning, 0 */
|
| 130 |
|
|
unsigned char st_shndx[2]; /* Associated section index */
|
| 131 |
|
|
} Elf32_External_Sym;
|
| 132 |
|
|
|
| 133 |
|
|
typedef struct {
|
| 134 |
|
|
unsigned char st_name[4]; /* Symbol name, index in string tbl */
|
| 135 |
|
|
unsigned char st_info[1]; /* Type and binding attributes */
|
| 136 |
|
|
unsigned char st_other[1]; /* No defined meaning, 0 */
|
| 137 |
|
|
unsigned char st_shndx[2]; /* Associated section index */
|
| 138 |
|
|
unsigned char st_value[8]; /* Value of the symbol */
|
| 139 |
|
|
unsigned char st_size[8]; /* Associated symbol size */
|
| 140 |
|
|
} Elf64_External_Sym;
|
| 141 |
|
|
|
| 142 |
|
|
/* Note segments */
|
| 143 |
|
|
|
| 144 |
|
|
typedef struct {
|
| 145 |
|
|
unsigned char namesz[4]; /* Size of entry's owner string */
|
| 146 |
|
|
unsigned char descsz[4]; /* Size of the note descriptor */
|
| 147 |
|
|
unsigned char type[4]; /* Interpretation of the descriptor */
|
| 148 |
|
|
char name[1]; /* Start of the name+desc data */
|
| 149 |
|
|
} Elf_External_Note;
|
| 150 |
|
|
|
| 151 |
|
|
/* Relocation Entries */
|
| 152 |
|
|
typedef struct {
|
| 153 |
|
|
unsigned char r_offset[4]; /* Location at which to apply the action */
|
| 154 |
|
|
unsigned char r_info[4]; /* index and type of relocation */
|
| 155 |
|
|
} Elf32_External_Rel;
|
| 156 |
|
|
|
| 157 |
|
|
typedef struct {
|
| 158 |
|
|
unsigned char r_offset[4]; /* Location at which to apply the action */
|
| 159 |
|
|
unsigned char r_info[4]; /* index and type of relocation */
|
| 160 |
|
|
unsigned char r_addend[4]; /* Constant addend used to compute value */
|
| 161 |
|
|
} Elf32_External_Rela;
|
| 162 |
|
|
|
| 163 |
|
|
typedef struct {
|
| 164 |
|
|
unsigned char r_offset[8]; /* Location at which to apply the action */
|
| 165 |
|
|
unsigned char r_info[8]; /* index and type of relocation */
|
| 166 |
|
|
} Elf64_External_Rel;
|
| 167 |
|
|
|
| 168 |
|
|
typedef struct {
|
| 169 |
|
|
unsigned char r_offset[8]; /* Location at which to apply the action */
|
| 170 |
|
|
unsigned char r_info[8]; /* index and type of relocation */
|
| 171 |
|
|
unsigned char r_addend[8]; /* Constant addend used to compute value */
|
| 172 |
|
|
} Elf64_External_Rela;
|
| 173 |
|
|
|
| 174 |
|
|
/* dynamic section structure */
|
| 175 |
|
|
|
| 176 |
|
|
typedef struct {
|
| 177 |
|
|
unsigned char d_tag[4]; /* entry tag value */
|
| 178 |
|
|
union {
|
| 179 |
|
|
unsigned char d_val[4];
|
| 180 |
|
|
unsigned char d_ptr[4];
|
| 181 |
|
|
} d_un;
|
| 182 |
|
|
} Elf32_External_Dyn;
|
| 183 |
|
|
|
| 184 |
|
|
typedef struct {
|
| 185 |
|
|
unsigned char d_tag[8]; /* entry tag value */
|
| 186 |
|
|
union {
|
| 187 |
|
|
unsigned char d_val[8];
|
| 188 |
|
|
unsigned char d_ptr[8];
|
| 189 |
|
|
} d_un;
|
| 190 |
|
|
} Elf64_External_Dyn;
|
