| /* ELF support for BFD. |
| Copyright (C) 1991-2023 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 3 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 |
| |
| /* Special section indices, which may show up in st_shndx fields, among |
| other places. */ |
| |
| #define SHN_LORESERVE 0xFF00 /* Begin range of reserved indices */ |
| #define SHN_LOPROC 0xFF00 /* Begin range of appl-specific */ |
| #define SHN_HIPROC 0xFF1F /* End range of appl-specific */ |
| #define SHN_LOOS 0xFF20 /* OS specific semantics, lo */ |
| #define SHN_HIOS 0xFF3F /* OS specific semantics, hi */ |
| #define SHN_ABS 0xFFF1 /* Associated symbol is absolute */ |
| #define SHN_COMMON 0xFFF2 /* Associated symbol is in common */ |
| #define SHN_XINDEX 0xFFFF /* Section index is held elsewhere */ |
| #define SHN_HIRESERVE 0xFFFF /* End range of reserved indices */ |
| |
| /* 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; |
| |
| /* Compression header */ |
| |
| typedef struct { |
| unsigned char ch_type[4]; /* Type of compression */ |
| unsigned char ch_size[4]; /* Size of uncompressed data in bytes */ |
| unsigned char ch_addralign[4]; /* Alignment of uncompressed data */ |
| } Elf32_External_Chdr; |
| |
| typedef struct { |
| unsigned char ch_type[4]; /* Type of compression */ |
| unsigned char ch_reserved[4]; /* Padding */ |
| unsigned char ch_size[8]; /* Size of uncompressed data in bytes */ |
| unsigned char ch_addralign[8]; /* Alignment of uncompressed data */ |
| } Elf64_External_Chdr; |
| |
| /* 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; |
| |
| /* Align an address upward to a boundary, expressed as a number of bytes. |
| E.g. align to an 8-byte boundary with argument of 8. */ |
| #define ELF_ALIGN_UP(addr, boundary) \ |
| (((bfd_vma) (addr) + ((boundary) - 1)) & ~ (bfd_vma) ((boundary) -1)) |
| |
| /* Compute the offset of the note descriptor from size of note entry's |
| owner string and note alignment. */ |
| #define ELF_NOTE_DESC_OFFSET(namesz, align) \ |
| ELF_ALIGN_UP (offsetof (Elf_External_Note, name) + (namesz), (align)) |
| |
| /* Compute the offset of the next note entry from size of note entry's |
| owner string, size of the note descriptor and note alignment. */ |
| #define ELF_NOTE_NEXT_OFFSET(namesz, descsz, align) \ |
| ELF_ALIGN_UP (ELF_NOTE_DESC_OFFSET ((namesz), (align)) + (descsz), \ |
| (align)) |
| |
| /* 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_data[4]; /* RELR entry */ |
| } Elf32_External_Relr; |
| |
| 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; |
| |
| typedef struct { |
| unsigned char r_data[8]; /* RELR entry */ |
| } Elf64_External_Relr; |
| |
| /* 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]; |
| } ATTRIBUTE_PACKED 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 */ |
