internal.h revision 33965
133965Sjdp/* ELF support for BFD. 233965Sjdp Copyright (C) 1991, 92, 93, 94, 95, 1997 Free Software Foundation, Inc. 333965Sjdp 433965Sjdp Written by Fred Fish @ Cygnus Support, from information published 533965Sjdp in "UNIX System V Release 4, Programmers Guide: ANSI C and 633965Sjdp Programming Support Tools". 733965Sjdp 833965SjdpThis file is part of BFD, the Binary File Descriptor library. 933965Sjdp 1033965SjdpThis program is free software; you can redistribute it and/or modify 1133965Sjdpit under the terms of the GNU General Public License as published by 1233965Sjdpthe Free Software Foundation; either version 2 of the License, or 1333965Sjdp(at your option) any later version. 1433965Sjdp 1533965SjdpThis program is distributed in the hope that it will be useful, 1633965Sjdpbut WITHOUT ANY WARRANTY; without even the implied warranty of 1733965SjdpMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1833965SjdpGNU General Public License for more details. 1933965Sjdp 2033965SjdpYou should have received a copy of the GNU General Public License 2133965Sjdpalong with this program; if not, write to the Free Software 2233965SjdpFoundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 2333965Sjdp 2433965Sjdp 2533965Sjdp/* This file is part of ELF support for BFD, and contains the portions 2633965Sjdp that describe how ELF is represented internally in the BFD library. 2733965Sjdp I.E. it describes the in-memory representation of ELF. It requires 2833965Sjdp the elf-common.h file which contains the portions that are common to 2933965Sjdp both the internal and external representations. */ 3033965Sjdp 3133965Sjdp 3233965Sjdp/* NOTE that these structures are not kept in the same order as they appear 3333965Sjdp in the object file. In some cases they've been reordered for more optimal 3433965Sjdp packing under various circumstances. */ 3533965Sjdp 3633965Sjdp#ifndef _ELF_INTERNAL_H 3733965Sjdp#define _ELF_INTERNAL_H 3833965Sjdp 3933965Sjdp/* ELF Header */ 4033965Sjdp 4133965Sjdp#define EI_NIDENT 16 /* Size of e_ident[] */ 4233965Sjdp 4333965Sjdptypedef struct elf_internal_ehdr { 4433965Sjdp unsigned char e_ident[EI_NIDENT]; /* ELF "magic number" */ 4533965Sjdp bfd_vma e_entry; /* Entry point virtual address */ 4633965Sjdp bfd_signed_vma e_phoff; /* Program header table file offset */ 4733965Sjdp bfd_signed_vma e_shoff; /* Section header table file offset */ 4833965Sjdp unsigned long e_version; /* Identifies object file version */ 4933965Sjdp unsigned long e_flags; /* Processor-specific flags */ 5033965Sjdp unsigned short e_type; /* Identifies object file type */ 5133965Sjdp unsigned short e_machine; /* Specifies required architecture */ 5233965Sjdp unsigned short e_ehsize; /* ELF header size in bytes */ 5333965Sjdp unsigned short e_phentsize; /* Program header table entry size */ 5433965Sjdp unsigned short e_phnum; /* Program header table entry count */ 5533965Sjdp unsigned short e_shentsize; /* Section header table entry size */ 5633965Sjdp unsigned short e_shnum; /* Section header table entry count */ 5733965Sjdp unsigned short e_shstrndx; /* Section header string table index */ 5833965Sjdp} Elf_Internal_Ehdr; 5933965Sjdp 6033965Sjdp#define elf32_internal_ehdr elf_internal_ehdr 6133965Sjdp#define Elf32_Internal_Ehdr Elf_Internal_Ehdr 6233965Sjdp#define elf64_internal_ehdr elf_internal_ehdr 6333965Sjdp#define Elf64_Internal_Ehdr Elf_Internal_Ehdr 6433965Sjdp 6533965Sjdp/* Program header */ 6633965Sjdp 6733965Sjdpstruct elf_internal_phdr { 6833965Sjdp unsigned long p_type; /* Identifies program segment type */ 6933965Sjdp unsigned long p_flags; /* Segment flags */ 7033965Sjdp bfd_vma p_offset; /* Segment file offset */ 7133965Sjdp bfd_vma p_vaddr; /* Segment virtual address */ 7233965Sjdp bfd_vma p_paddr; /* Segment physical address */ 7333965Sjdp bfd_vma p_filesz; /* Segment size in file */ 7433965Sjdp bfd_vma p_memsz; /* Segment size in memory */ 7533965Sjdp bfd_vma p_align; /* Segment alignment, file & memory */ 7633965Sjdp}; 7733965Sjdp 7833965Sjdptypedef struct elf_internal_phdr Elf_Internal_Phdr; 7933965Sjdp#define elf32_internal_phdr elf_internal_phdr 8033965Sjdp#define Elf32_Internal_Phdr Elf_Internal_Phdr 8133965Sjdp#define elf64_internal_phdr elf_internal_phdr 8233965Sjdp#define Elf64_Internal_Phdr Elf_Internal_Phdr 8333965Sjdp 8433965Sjdp/* Section header */ 8533965Sjdp 8633965Sjdptypedef struct elf_internal_shdr { 8733965Sjdp unsigned int sh_name; /* Section name, index in string tbl */ 8833965Sjdp unsigned int sh_type; /* Type of section */ 8933965Sjdp bfd_vma sh_flags; /* Miscellaneous section attributes */ 9033965Sjdp bfd_vma sh_addr; /* Section virtual addr at execution */ 9133965Sjdp bfd_size_type sh_size; /* Size of section in bytes */ 9233965Sjdp bfd_size_type sh_entsize; /* Entry size if section holds table */ 9333965Sjdp unsigned long sh_link; /* Index of another section */ 9433965Sjdp unsigned long sh_info; /* Additional section information */ 9533965Sjdp file_ptr sh_offset; /* Section file offset */ 9633965Sjdp unsigned int sh_addralign; /* Section alignment */ 9733965Sjdp 9833965Sjdp /* The internal rep also has some cached info associated with it. */ 9933965Sjdp asection * bfd_section; /* Associated BFD section. */ 10033965Sjdp PTR contents; /* Section contents. */ 10133965Sjdp} Elf_Internal_Shdr; 10233965Sjdp 10333965Sjdp#define elf32_internal_shdr elf_internal_shdr 10433965Sjdp#define Elf32_Internal_Shdr Elf_Internal_Shdr 10533965Sjdp#define elf64_internal_shdr elf_internal_shdr 10633965Sjdp#define Elf64_Internal_Shdr Elf_Internal_Shdr 10733965Sjdp 10833965Sjdp/* Symbol table entry */ 10933965Sjdp 11033965Sjdpstruct elf_internal_sym { 11133965Sjdp bfd_vma st_value; /* Value of the symbol */ 11233965Sjdp bfd_vma st_size; /* Associated symbol size */ 11333965Sjdp unsigned long st_name; /* Symbol name, index in string tbl */ 11433965Sjdp unsigned char st_info; /* Type and binding attributes */ 11533965Sjdp unsigned char st_other; /* No defined meaning, 0 */ 11633965Sjdp unsigned short st_shndx; /* Associated section index */ 11733965Sjdp}; 11833965Sjdp 11933965Sjdptypedef struct elf_internal_sym Elf_Internal_Sym; 12033965Sjdp 12133965Sjdp#define elf32_internal_sym elf_internal_sym 12233965Sjdp#define elf64_internal_sym elf_internal_sym 12333965Sjdp#define Elf32_Internal_Sym Elf_Internal_Sym 12433965Sjdp#define Elf64_Internal_Sym Elf_Internal_Sym 12533965Sjdp 12633965Sjdp/* Note segments */ 12733965Sjdp 12833965Sjdptypedef struct elf_internal_note { 12933965Sjdp unsigned long namesz; /* Size of entry's owner string */ 13033965Sjdp unsigned long descsz; /* Size of the note descriptor */ 13133965Sjdp unsigned long type; /* Interpretation of the descriptor */ 13233965Sjdp char name[1]; /* Start of the name+desc data */ 13333965Sjdp} Elf_Internal_Note; 13433965Sjdp#define Elf32_Internal_Note Elf_Internal_Note 13533965Sjdp#define elf32_internal_note elf_internal_note 13633965Sjdp 13733965Sjdp/* Relocation Entries */ 13833965Sjdp 13933965Sjdptypedef struct elf_internal_rel { 14033965Sjdp bfd_vma r_offset; /* Location at which to apply the action */ 14133965Sjdp /* This needs to support 64-bit values in elf64. */ 14233965Sjdp bfd_vma r_info; /* index and type of relocation */ 14333965Sjdp} Elf_Internal_Rel; 14433965Sjdp 14533965Sjdp#define elf32_internal_rel elf_internal_rel 14633965Sjdp#define Elf32_Internal_Rel Elf_Internal_Rel 14733965Sjdp#define elf64_internal_rel elf_internal_rel 14833965Sjdp#define Elf64_Internal_Rel Elf_Internal_Rel 14933965Sjdp 15033965Sjdptypedef struct elf_internal_rela { 15133965Sjdp bfd_vma r_offset; /* Location at which to apply the action */ 15233965Sjdp bfd_vma r_info; /* Index and Type of relocation */ 15333965Sjdp bfd_signed_vma r_addend; /* Constant addend used to compute value */ 15433965Sjdp} Elf_Internal_Rela; 15533965Sjdp 15633965Sjdp#define elf32_internal_rela elf_internal_rela 15733965Sjdp#define elf64_internal_rela elf_internal_rela 15833965Sjdp#define Elf32_Internal_Rela Elf_Internal_Rela 15933965Sjdp#define Elf64_Internal_Rela Elf_Internal_Rela 16033965Sjdp 16133965Sjdp/* dynamic section structure */ 16233965Sjdp 16333965Sjdptypedef struct elf_internal_dyn { 16433965Sjdp /* This needs to support 64-bit values in elf64. */ 16533965Sjdp bfd_vma d_tag; /* entry tag value */ 16633965Sjdp union { 16733965Sjdp /* This needs to support 64-bit values in elf64. */ 16833965Sjdp bfd_vma d_val; 16933965Sjdp bfd_vma d_ptr; 17033965Sjdp } d_un; 17133965Sjdp} Elf_Internal_Dyn; 17233965Sjdp 17333965Sjdp#define elf32_internal_dyn elf_internal_dyn 17433965Sjdp#define elf64_internal_dyn elf_internal_dyn 17533965Sjdp#define Elf32_Internal_Dyn Elf_Internal_Dyn 17633965Sjdp#define Elf64_Internal_Dyn Elf_Internal_Dyn 17733965Sjdp 17833965Sjdp/* This structure appears in a SHT_GNU_verdef section. */ 17933965Sjdp 18033965Sjdptypedef struct elf_internal_verdef { 18133965Sjdp unsigned short vd_version; /* Version number of structure. */ 18233965Sjdp unsigned short vd_flags; /* Flags (VER_FLG_*). */ 18333965Sjdp unsigned short vd_ndx; /* Version index. */ 18433965Sjdp unsigned short vd_cnt; /* Number of verdaux entries. */ 18533965Sjdp unsigned long vd_hash; /* Hash of name. */ 18633965Sjdp unsigned long vd_aux; /* Offset to verdaux entries. */ 18733965Sjdp unsigned long vd_next; /* Offset to next verdef. */ 18833965Sjdp 18933965Sjdp /* These fields are set up when BFD reads in the structure. FIXME: 19033965Sjdp It would be cleaner to store these in a different structure. */ 19133965Sjdp bfd *vd_bfd; /* BFD. */ 19233965Sjdp const char *vd_nodename; /* Version name. */ 19333965Sjdp struct elf_internal_verdef *vd_nextdef; /* vd_next as pointer. */ 19433965Sjdp struct elf_internal_verdaux *vd_auxptr; /* vd_aux as pointer. */ 19533965Sjdp unsigned int vd_exp_refno; /* Used by the linker. */ 19633965Sjdp} Elf_Internal_Verdef; 19733965Sjdp 19833965Sjdp/* This structure appears in a SHT_GNU_verdef section. */ 19933965Sjdp 20033965Sjdptypedef struct elf_internal_verdaux { 20133965Sjdp unsigned long vda_name; /* String table offset of name. */ 20233965Sjdp unsigned long vda_next; /* Offset to next verdaux. */ 20333965Sjdp 20433965Sjdp /* These fields are set up when BFD reads in the structure. FIXME: 20533965Sjdp It would be cleaner to store these in a different structure. */ 20633965Sjdp const char *vda_nodename; /* vda_name as pointer. */ 20733965Sjdp struct elf_internal_verdaux *vda_nextptr; /* vda_next as pointer. */ 20833965Sjdp} Elf_Internal_Verdaux; 20933965Sjdp 21033965Sjdp/* This structure appears in a SHT_GNU_verneed section. */ 21133965Sjdp 21233965Sjdptypedef struct elf_internal_verneed { 21333965Sjdp unsigned short vn_version; /* Version number of structure. */ 21433965Sjdp unsigned short vn_cnt; /* Number of vernaux entries. */ 21533965Sjdp unsigned long vn_file; /* String table offset of library name. */ 21633965Sjdp unsigned long vn_aux; /* Offset to vernaux entries. */ 21733965Sjdp unsigned long vn_next; /* Offset to next verneed. */ 21833965Sjdp 21933965Sjdp /* These fields are set up when BFD reads in the structure. FIXME: 22033965Sjdp It would be cleaner to store these in a different structure. */ 22133965Sjdp bfd *vn_bfd; /* BFD. */ 22233965Sjdp const char *vn_filename; /* vn_file as pointer. */ 22333965Sjdp struct elf_internal_vernaux *vn_auxptr; /* vn_aux as pointer. */ 22433965Sjdp struct elf_internal_verneed *vn_nextref; /* vn_nextref as pointer. */ 22533965Sjdp} Elf_Internal_Verneed; 22633965Sjdp 22733965Sjdp/* This structure appears in a SHT_GNU_verneed section. */ 22833965Sjdp 22933965Sjdptypedef struct elf_internal_vernaux { 23033965Sjdp unsigned long vna_hash; /* Hash of dependency name. */ 23133965Sjdp unsigned short vna_flags; /* Flags (VER_FLG_*). */ 23233965Sjdp unsigned short vna_other; /* Unused. */ 23333965Sjdp unsigned long vna_name; /* String table offset to version name. */ 23433965Sjdp unsigned long vna_next; /* Offset to next vernaux. */ 23533965Sjdp 23633965Sjdp /* These fields are set up when BFD reads in the structure. FIXME: 23733965Sjdp It would be cleaner to store these in a different structure. */ 23833965Sjdp const char *vna_nodename; /* vna_name as pointer. */ 23933965Sjdp struct elf_internal_vernaux *vna_nextptr; /* vna_next as pointer. */ 24033965Sjdp} Elf_Internal_Vernaux; 24133965Sjdp 24233965Sjdp/* This structure appears in a SHT_GNU_versym section. This is not a 24333965Sjdp standard ELF structure; ELF just uses Elf32_Half. */ 24433965Sjdp 24533965Sjdptypedef struct elf_internal_versym { 24633965Sjdp unsigned short vs_vers; 24733965Sjdp} Elf_Internal_Versym; 24833965Sjdp 24933965Sjdp#define elf32_internal_verdef elf_internal_verdef 25033965Sjdp#define elf64_internal_verdef elf_internal_verdef 25133965Sjdp#define elf32_internal_verdaux elf_internal_verdaux 25233965Sjdp#define elf64_internal_verdaux elf_internal_verdaux 25333965Sjdp#define elf32_internal_verneed elf_internal_verneed 25433965Sjdp#define elf64_internal_verneed elf_internal_verneed 25533965Sjdp#define elf32_internal_vernaux elf_internal_vernaux 25633965Sjdp#define elf64_internal_vernaux elf_internal_vernaux 25733965Sjdp#define elf32_internal_versym elf_internal_versym 25833965Sjdp#define elf64_internal_versym elf_internal_versym 25933965Sjdp 26033965Sjdp#define Elf32_Internal_Verdef Elf_Internal_Verdef 26133965Sjdp#define Elf64_Internal_Verdef Elf_Internal_Verdef 26233965Sjdp#define Elf32_Internal_Verdaux Elf_Internal_Verdaux 26333965Sjdp#define Elf64_Internal_Verdaux Elf_Internal_Verdaux 26433965Sjdp#define Elf32_Internal_Verneed Elf_Internal_Verneed 26533965Sjdp#define Elf64_Internal_Verneed Elf_Internal_Verneed 26633965Sjdp#define Elf32_Internal_Vernaux Elf_Internal_Vernaux 26733965Sjdp#define Elf64_Internal_Vernaux Elf_Internal_Vernaux 26833965Sjdp#define Elf32_Internal_Versym Elf_Internal_Versym 26933965Sjdp#define Elf64_Internal_Versym Elf_Internal_Versym 27033965Sjdp 27133965Sjdp/* This structure is used to describe how sections should be assigned 27233965Sjdp to program segments. */ 27333965Sjdp 27433965Sjdpstruct elf_segment_map 27533965Sjdp{ 27633965Sjdp /* Next program segment. */ 27733965Sjdp struct elf_segment_map *next; 27833965Sjdp /* Program segment type. */ 27933965Sjdp unsigned long p_type; 28033965Sjdp /* Program segment flags. */ 28133965Sjdp unsigned long p_flags; 28233965Sjdp /* Program segment physical address. */ 28333965Sjdp bfd_vma p_paddr; 28433965Sjdp /* Whether the p_flags field is valid; if not, the flags are based 28533965Sjdp on the section flags. */ 28633965Sjdp unsigned int p_flags_valid : 1; 28733965Sjdp /* Whether the p_paddr field is valid; if not, the physical address 28833965Sjdp is based on the section lma values. */ 28933965Sjdp unsigned int p_paddr_valid : 1; 29033965Sjdp /* Whether this segment includes the file header. */ 29133965Sjdp unsigned int includes_filehdr : 1; 29233965Sjdp /* Whether this segment includes the program headers. */ 29333965Sjdp unsigned int includes_phdrs : 1; 29433965Sjdp /* Number of sections (may be 0). */ 29533965Sjdp unsigned int count; 29633965Sjdp /* Sections. Actual number of elements is in count field. */ 29733965Sjdp asection *sections[1]; 29833965Sjdp}; 29933965Sjdp 30033965Sjdp#endif /* _ELF_INTERNAL_H */ 301