forked from KolibriOS/kolibrios
303 lines
11 KiB
C
303 lines
11 KiB
C
/* ELF support for BFD.
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Copyright (C) 1991-2015 Free Software Foundation, Inc.
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Written by Fred Fish @ Cygnus Support, from information published
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in "UNIX System V Release 4, Programmers Guide: ANSI C and
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Programming Support Tools".
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/* This file is part of ELF support for BFD, and contains the portions
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that describe how ELF is represented externally by the BFD library.
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I.E. it describes the in-file representation of ELF. It requires
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the elf/common.h file which contains the portions that are common to
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both the internal and external representations. */
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/* The 64-bit stuff is kind of random. Perhaps someone will publish a
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spec someday. */
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#ifndef _ELF_EXTERNAL_H
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#define _ELF_EXTERNAL_H
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/* Special section indices, which may show up in st_shndx fields, among
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other places. */
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#define SHN_LORESERVE 0xFF00 /* Begin range of reserved indices */
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#define SHN_LOPROC 0xFF00 /* Begin range of appl-specific */
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#define SHN_HIPROC 0xFF1F /* End range of appl-specific */
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#define SHN_LOOS 0xFF20 /* OS specific semantics, lo */
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#define SHN_HIOS 0xFF3F /* OS specific semantics, hi */
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#define SHN_ABS 0xFFF1 /* Associated symbol is absolute */
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#define SHN_COMMON 0xFFF2 /* Associated symbol is in common */
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#define SHN_XINDEX 0xFFFF /* Section index is held elsewhere */
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#define SHN_HIRESERVE 0xFFFF /* End range of reserved indices */
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/* ELF Header (32-bit implementations) */
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typedef struct {
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unsigned char e_ident[16]; /* ELF "magic number" */
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unsigned char e_type[2]; /* Identifies object file type */
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unsigned char e_machine[2]; /* Specifies required architecture */
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unsigned char e_version[4]; /* Identifies object file version */
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unsigned char e_entry[4]; /* Entry point virtual address */
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unsigned char e_phoff[4]; /* Program header table file offset */
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unsigned char e_shoff[4]; /* Section header table file offset */
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unsigned char e_flags[4]; /* Processor-specific flags */
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unsigned char e_ehsize[2]; /* ELF header size in bytes */
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unsigned char e_phentsize[2]; /* Program header table entry size */
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unsigned char e_phnum[2]; /* Program header table entry count */
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unsigned char e_shentsize[2]; /* Section header table entry size */
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unsigned char e_shnum[2]; /* Section header table entry count */
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unsigned char e_shstrndx[2]; /* Section header string table index */
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} Elf32_External_Ehdr;
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typedef struct {
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unsigned char e_ident[16]; /* ELF "magic number" */
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unsigned char e_type[2]; /* Identifies object file type */
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unsigned char e_machine[2]; /* Specifies required architecture */
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unsigned char e_version[4]; /* Identifies object file version */
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unsigned char e_entry[8]; /* Entry point virtual address */
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unsigned char e_phoff[8]; /* Program header table file offset */
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unsigned char e_shoff[8]; /* Section header table file offset */
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unsigned char e_flags[4]; /* Processor-specific flags */
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unsigned char e_ehsize[2]; /* ELF header size in bytes */
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unsigned char e_phentsize[2]; /* Program header table entry size */
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unsigned char e_phnum[2]; /* Program header table entry count */
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unsigned char e_shentsize[2]; /* Section header table entry size */
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unsigned char e_shnum[2]; /* Section header table entry count */
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unsigned char e_shstrndx[2]; /* Section header string table index */
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} Elf64_External_Ehdr;
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/* Program header */
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typedef struct {
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unsigned char p_type[4]; /* Identifies program segment type */
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unsigned char p_offset[4]; /* Segment file offset */
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unsigned char p_vaddr[4]; /* Segment virtual address */
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unsigned char p_paddr[4]; /* Segment physical address */
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unsigned char p_filesz[4]; /* Segment size in file */
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unsigned char p_memsz[4]; /* Segment size in memory */
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unsigned char p_flags[4]; /* Segment flags */
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unsigned char p_align[4]; /* Segment alignment, file & memory */
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} Elf32_External_Phdr;
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typedef struct {
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unsigned char p_type[4]; /* Identifies program segment type */
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unsigned char p_flags[4]; /* Segment flags */
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unsigned char p_offset[8]; /* Segment file offset */
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unsigned char p_vaddr[8]; /* Segment virtual address */
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unsigned char p_paddr[8]; /* Segment physical address */
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unsigned char p_filesz[8]; /* Segment size in file */
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unsigned char p_memsz[8]; /* Segment size in memory */
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unsigned char p_align[8]; /* Segment alignment, file & memory */
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} Elf64_External_Phdr;
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/* Section header */
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typedef struct {
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unsigned char sh_name[4]; /* Section name, index in string tbl */
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unsigned char sh_type[4]; /* Type of section */
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unsigned char sh_flags[4]; /* Miscellaneous section attributes */
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unsigned char sh_addr[4]; /* Section virtual addr at execution */
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unsigned char sh_offset[4]; /* Section file offset */
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unsigned char sh_size[4]; /* Size of section in bytes */
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unsigned char sh_link[4]; /* Index of another section */
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unsigned char sh_info[4]; /* Additional section information */
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unsigned char sh_addralign[4]; /* Section alignment */
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unsigned char sh_entsize[4]; /* Entry size if section holds table */
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} Elf32_External_Shdr;
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typedef struct {
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unsigned char sh_name[4]; /* Section name, index in string tbl */
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unsigned char sh_type[4]; /* Type of section */
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unsigned char sh_flags[8]; /* Miscellaneous section attributes */
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unsigned char sh_addr[8]; /* Section virtual addr at execution */
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unsigned char sh_offset[8]; /* Section file offset */
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unsigned char sh_size[8]; /* Size of section in bytes */
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unsigned char sh_link[4]; /* Index of another section */
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unsigned char sh_info[4]; /* Additional section information */
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unsigned char sh_addralign[8]; /* Section alignment */
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unsigned char sh_entsize[8]; /* Entry size if section holds table */
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} Elf64_External_Shdr;
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/* Compression header */
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typedef struct {
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unsigned char ch_type[4]; /* Type of compression */
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unsigned char ch_size[4]; /* Size of uncompressed data in bytes */
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unsigned char ch_addralign[4]; /* Alignment of uncompressed data */
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} Elf32_External_Chdr;
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typedef struct {
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unsigned char ch_type[4]; /* Type of compression */
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unsigned char ch_reserved[4]; /* Padding */
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unsigned char ch_size[8]; /* Size of uncompressed data in bytes */
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unsigned char ch_addralign[8]; /* Alignment of uncompressed data */
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} Elf64_External_Chdr;
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/* Symbol table entry */
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typedef struct {
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unsigned char st_name[4]; /* Symbol name, index in string tbl */
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unsigned char st_value[4]; /* Value of the symbol */
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unsigned char st_size[4]; /* Associated symbol size */
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unsigned char st_info[1]; /* Type and binding attributes */
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unsigned char st_other[1]; /* No defined meaning, 0 */
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unsigned char st_shndx[2]; /* Associated section index */
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} Elf32_External_Sym;
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typedef struct {
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unsigned char st_name[4]; /* Symbol name, index in string tbl */
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unsigned char st_info[1]; /* Type and binding attributes */
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unsigned char st_other[1]; /* No defined meaning, 0 */
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unsigned char st_shndx[2]; /* Associated section index */
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unsigned char st_value[8]; /* Value of the symbol */
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unsigned char st_size[8]; /* Associated symbol size */
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} Elf64_External_Sym;
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typedef struct {
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unsigned char est_shndx[4]; /* Section index */
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} Elf_External_Sym_Shndx;
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/* Note segments */
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typedef struct {
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unsigned char namesz[4]; /* Size of entry's owner string */
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unsigned char descsz[4]; /* Size of the note descriptor */
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unsigned char type[4]; /* Interpretation of the descriptor */
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char name[1]; /* Start of the name+desc data */
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} Elf_External_Note;
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/* Relocation Entries */
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typedef struct {
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unsigned char r_offset[4]; /* Location at which to apply the action */
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unsigned char r_info[4]; /* index and type of relocation */
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} Elf32_External_Rel;
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typedef struct {
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unsigned char r_offset[4]; /* Location at which to apply the action */
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unsigned char r_info[4]; /* index and type of relocation */
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unsigned char r_addend[4]; /* Constant addend used to compute value */
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} Elf32_External_Rela;
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typedef struct {
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unsigned char r_offset[8]; /* Location at which to apply the action */
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unsigned char r_info[8]; /* index and type of relocation */
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} Elf64_External_Rel;
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typedef struct {
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unsigned char r_offset[8]; /* Location at which to apply the action */
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unsigned char r_info[8]; /* index and type of relocation */
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unsigned char r_addend[8]; /* Constant addend used to compute value */
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} Elf64_External_Rela;
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/* dynamic section structure */
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typedef struct {
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unsigned char d_tag[4]; /* entry tag value */
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union {
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unsigned char d_val[4];
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unsigned char d_ptr[4];
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} d_un;
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} Elf32_External_Dyn;
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typedef struct {
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unsigned char d_tag[8]; /* entry tag value */
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union {
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unsigned char d_val[8];
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unsigned char d_ptr[8];
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} d_un;
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} Elf64_External_Dyn;
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/* The version structures are currently size independent. They are
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named without a 32 or 64. If that ever changes, these structures
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will need to be renamed. */
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/* This structure appears in a SHT_GNU_verdef section. */
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typedef struct {
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unsigned char vd_version[2];
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unsigned char vd_flags[2];
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unsigned char vd_ndx[2];
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unsigned char vd_cnt[2];
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unsigned char vd_hash[4];
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unsigned char vd_aux[4];
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unsigned char vd_next[4];
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} Elf_External_Verdef;
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/* This structure appears in a SHT_GNU_verdef section. */
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typedef struct {
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unsigned char vda_name[4];
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unsigned char vda_next[4];
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} Elf_External_Verdaux;
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/* This structure appears in a SHT_GNU_verneed section. */
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typedef struct {
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unsigned char vn_version[2];
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unsigned char vn_cnt[2];
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unsigned char vn_file[4];
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unsigned char vn_aux[4];
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unsigned char vn_next[4];
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} Elf_External_Verneed;
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/* This structure appears in a SHT_GNU_verneed section. */
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typedef struct {
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unsigned char vna_hash[4];
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unsigned char vna_flags[2];
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unsigned char vna_other[2];
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unsigned char vna_name[4];
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unsigned char vna_next[4];
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} Elf_External_Vernaux;
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/* This structure appears in a SHT_GNU_versym section. This is not a
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standard ELF structure; ELF just uses Elf32_Half. */
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typedef struct {
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unsigned char vs_vers[2];
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} ATTRIBUTE_PACKED Elf_External_Versym;
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/* Structure for syminfo section. */
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typedef struct
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{
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unsigned char si_boundto[2];
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unsigned char si_flags[2];
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} Elf_External_Syminfo;
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/* This structure appears on the stack and in NT_AUXV core file notes. */
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typedef struct
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{
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unsigned char a_type[4];
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unsigned char a_val[4];
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} Elf32_External_Auxv;
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typedef struct
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{
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unsigned char a_type[8];
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unsigned char a_val[8];
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} Elf64_External_Auxv;
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/* Size of SHT_GROUP section entry. */
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#define GRP_ENTRY_SIZE 4
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#endif /* _ELF_EXTERNAL_H */
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