/* ELF support for BFD. Copyright 1991, 1992, 1993, 1995, 1997, 1998, 1999, 2001, 2003, 2005 Free Software Foundation, Inc. Written by Fred Fish @ Cygnus Support, from information published in "UNIX System V Release 4, Programmers Guide: ANSI C and Programming Support Tools". This file is part of BFD, the Binary File Descriptor library. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ /* This file is part of ELF support for BFD, and contains the portions that describe how ELF is represented externally by the BFD library. I.E. it describes the in-file representation of ELF. It requires the elf/common.h file which contains the portions that are common to both the internal and external representations. */ /* The 64-bit stuff is kind of random. Perhaps someone will publish a spec someday. */ #ifndef _ELF_EXTERNAL_H #define _ELF_EXTERNAL_H /* ELF Header (32-bit implementations) */ typedef struct { unsigned char e_ident[16]; /* ELF "magic number" */ unsigned char e_type[2]; /* Identifies object file type */ unsigned char e_machine[2]; /* Specifies required architecture */ unsigned char e_version[4]; /* Identifies object file version */ unsigned char e_entry[4]; /* Entry point virtual address */ unsigned char e_phoff[4]; /* Program header table file offset */ unsigned char e_shoff[4]; /* Section header table file offset */ unsigned char e_flags[4]; /* Processor-specific flags */ unsigned char e_ehsize[2]; /* ELF header size in bytes */ unsigned char e_phentsize[2]; /* Program header table entry size */ unsigned char e_phnum[2]; /* Program header table entry count */ unsigned char e_shentsize[2]; /* Section header table entry size */ unsigned char e_shnum[2]; /* Section header table entry count */ unsigned char e_shstrndx[2]; /* Section header string table index */ } Elf32_External_Ehdr; typedef struct { unsigned char e_ident[16]; /* ELF "magic number" */ unsigned char e_type[2]; /* Identifies object file type */ unsigned char e_machine[2]; /* Specifies required architecture */ unsigned char e_version[4]; /* Identifies object file version */ unsigned char e_entry[8]; /* Entry point virtual address */ unsigned char e_phoff[8]; /* Program header table file offset */ unsigned char e_shoff[8]; /* Section header table file offset */ unsigned char e_flags[4]; /* Processor-specific flags */ unsigned char e_ehsize[2]; /* ELF header size in bytes */ unsigned char e_phentsize[2]; /* Program header table entry size */ unsigned char e_phnum[2]; /* Program header table entry count */ unsigned char e_shentsize[2]; /* Section header table entry size */ unsigned char e_shnum[2]; /* Section header table entry count */ unsigned char e_shstrndx[2]; /* Section header string table index */ } Elf64_External_Ehdr; /* Program header */ typedef struct { unsigned char p_type[4]; /* Identifies program segment type */ unsigned char p_offset[4]; /* Segment file offset */ unsigned char p_vaddr[4]; /* Segment virtual address */ unsigned char p_paddr[4]; /* Segment physical address */ unsigned char p_filesz[4]; /* Segment size in file */ unsigned char p_memsz[4]; /* Segment size in memory */ unsigned char p_flags[4]; /* Segment flags */ unsigned char p_align[4]; /* Segment alignment, file & memory */ } Elf32_External_Phdr; typedef struct { unsigned char p_type[4]; /* Identifies program segment type */ unsigned char p_flags[4]; /* Segment flags */ unsigned char p_offset[8]; /* Segment file offset */ unsigned char p_vaddr[8]; /* Segment virtual address */ unsigned char p_paddr[8]; /* Segment physical address */ unsigned char p_filesz[8]; /* Segment size in file */ unsigned char p_memsz[8]; /* Segment size in memory */ unsigned char p_align[8]; /* Segment alignment, file & memory */ } Elf64_External_Phdr; /* Section header */ typedef struct { unsigned char sh_name[4]; /* Section name, index in string tbl */ unsigned char sh_type[4]; /* Type of section */ unsigned char sh_flags[4]; /* Miscellaneous section attributes */ unsigned char sh_addr[4]; /* Section virtual addr at execution */ unsigned char sh_offset[4]; /* Section file offset */ unsigned char sh_size[4]; /* Size of section in bytes */ unsigned char sh_link[4]; /* Index of another section */ unsigned char sh_info[4]; /* Additional section information */ unsigned char sh_addralign[4]; /* Section alignment */ unsigned char sh_entsize[4]; /* Entry size if section holds table */ } Elf32_External_Shdr; typedef struct { unsigned char sh_name[4]; /* Section name, index in string tbl */ unsigned char sh_type[4]; /* Type of section */ unsigned char sh_flags[8]; /* Miscellaneous section attributes */ unsigned char sh_addr[8]; /* Section virtual addr at execution */ unsigned char sh_offset[8]; /* Section file offset */ unsigned char sh_size[8]; /* Size of section in bytes */ unsigned char sh_link[4]; /* Index of another section */ unsigned char sh_info[4]; /* Additional section information */ unsigned char sh_addralign[8]; /* Section alignment */ unsigned char sh_entsize[8]; /* Entry size if section holds table */ } Elf64_External_Shdr; /* Symbol table entry */ typedef struct { unsigned char st_name[4]; /* Symbol name, index in string tbl */ unsigned char st_value[4]; /* Value of the symbol */ unsigned char st_size[4]; /* Associated symbol size */ unsigned char st_info[1]; /* Type and binding attributes */ unsigned char st_other[1]; /* No defined meaning, 0 */ unsigned char st_shndx[2]; /* Associated section index */ } Elf32_External_Sym; typedef struct { unsigned char st_name[4]; /* Symbol name, index in string tbl */ unsigned char st_info[1]; /* Type and binding attributes */ unsigned char st_other[1]; /* No defined meaning, 0 */ unsigned char st_shndx[2]; /* Associated section index */ unsigned char st_value[8]; /* Value of the symbol */ unsigned char st_size[8]; /* Associated symbol size */ } Elf64_External_Sym; typedef struct { unsigned char est_shndx[4]; /* Section index */ } Elf_External_Sym_Shndx; /* Note segments */ typedef struct { unsigned char namesz[4]; /* Size of entry's owner string */ unsigned char descsz[4]; /* Size of the note descriptor */ unsigned char type[4]; /* Interpretation of the descriptor */ char name[1]; /* Start of the name+desc data */ } Elf_External_Note; /* Relocation Entries */ typedef struct { unsigned char r_offset[4]; /* Location at which to apply the action */ unsigned char r_info[4]; /* index and type of relocation */ } Elf32_External_Rel; typedef struct { unsigned char r_offset[4]; /* Location at which to apply the action */ unsigned char r_info[4]; /* index and type of relocation */ unsigned char r_addend[4]; /* Constant addend used to compute value */ } Elf32_External_Rela; typedef struct { unsigned char r_offset[8]; /* Location at which to apply the action */ unsigned char r_info[8]; /* index and type of relocation */ } Elf64_External_Rel; typedef struct { unsigned char r_offset[8]; /* Location at which to apply the action */ unsigned char r_info[8]; /* index and type of relocation */ unsigned char r_addend[8]; /* Constant addend used to compute value */ } Elf64_External_Rela; /* dynamic section structure */ typedef struct { unsigned char d_tag[4]; /* entry tag value */ union { unsigned char d_val[4]; unsigned char d_ptr[4]; } d_un; } Elf32_External_Dyn; typedef struct { unsigned char d_tag[8]; /* entry tag value */ union { unsigned char d_val[8]; unsigned char d_ptr[8]; } d_un; } Elf64_External_Dyn; /* The version structures are currently size independent. They are named without a 32 or 64. If that ever changes, these structures will need to be renamed. */ /* This structure appears in a SHT_GNU_verdef section. */ typedef struct { unsigned char vd_version[2]; unsigned char vd_flags[2]; unsigned char vd_ndx[2]; unsigned char vd_cnt[2]; unsigned char vd_hash[4]; unsigned char vd_aux[4]; unsigned char vd_next[4]; } Elf_External_Verdef; /* This structure appears in a SHT_GNU_verdef section. */ typedef struct { unsigned char vda_name[4]; unsigned char vda_next[4]; } Elf_External_Verdaux; /* This structure appears in a SHT_GNU_verneed section. */ typedef struct { unsigned char vn_version[2]; unsigned char vn_cnt[2]; unsigned char vn_file[4]; unsigned char vn_aux[4]; unsigned char vn_next[4]; } Elf_External_Verneed; /* This structure appears in a SHT_GNU_verneed section. */ typedef struct { unsigned char vna_hash[4]; unsigned char vna_flags[2]; unsigned char vna_other[2]; unsigned char vna_name[4]; unsigned char vna_next[4]; } Elf_External_Vernaux; /* This structure appears in a SHT_GNU_versym section. This is not a standard ELF structure; ELF just uses Elf32_Half. */ typedef struct { unsigned char vs_vers[2]; } #ifdef __GNUC__ __attribute__ ((packed)) #endif Elf_External_Versym; /* Structure for syminfo section. */ typedef struct { unsigned char si_boundto[2]; unsigned char si_flags[2]; } Elf_External_Syminfo; /* This structure appears on the stack and in NT_AUXV core file notes. */ typedef struct { unsigned char a_type[4]; unsigned char a_val[4]; } Elf32_External_Auxv; typedef struct { unsigned char a_type[8]; unsigned char a_val[8]; } Elf64_External_Auxv; /* Size of SHT_GROUP section entry. */ #define GRP_ENTRY_SIZE 4 #endif /* _ELF_EXTERNAL_H */