elf_common.h revision 39189
1/*- 2 * Copyright (c) 1998 John D. Polstra. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $Id: elf_common.h,v 1.2 1998/09/08 20:38:06 jdp Exp $ 27 */ 28 29#ifndef _SYS_ELF_COMMON_H_ 30#define _SYS_ELF_COMMON_H_ 1 31 32/* 33 * ELF definitions that are independent of architecture or word size. 34 */ 35 36/* Indexes into the e_ident array. */ 37#define EI_MAG0 0 /* Magic number, byte 0. */ 38#define EI_MAG1 1 /* Magic number, byte 1. */ 39#define EI_MAG2 2 /* Magic number, byte 2. */ 40#define EI_MAG3 3 /* Magic number, byte 3. */ 41#define EI_CLASS 4 /* Class of machine. */ 42#define EI_DATA 5 /* Data format. */ 43#define EI_VERSION 6 /* ELF format version. */ 44#define EI_PAD 7 /* Start of padding (per SVR4 ABI). */ 45#define EI_BRAND 8 /* Start of architecture identification. */ 46#define EI_NIDENT 16 /* Size of e_ident array. */ 47 48/* Values for the magic number bytes. */ 49#define ELFMAG0 0x7f 50#define ELFMAG1 'E' 51#define ELFMAG2 'L' 52#define ELFMAG3 'F' 53 54/* Values for e_ident[EI_VERSION] and e_version. */ 55#define EV_NONE 0 56#define EV_CURRENT 1 57 58/* Values for e_ident[EI_CLASS]. */ 59#define ELFCLASSNONE 0 /* Unknown class. */ 60#define ELFCLASS32 1 /* 32-bit architecture. */ 61#define ELFCLASS64 2 /* 64-bit architecture. */ 62 63/* Values for e_ident[EI_DATA]. */ 64#define ELFDATANONE 0 /* Unknown data format. */ 65#define ELFDATA2LSB 1 /* 2's complement little-endian. */ 66#define ELFDATA2MSB 2 /* 2's complement big-endian. */ 67 68/* e_ident */ 69#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \ 70 (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \ 71 (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \ 72 (ehdr).e_ident[EI_MAG3] == ELFMAG3) 73 74/* Values for e_type. */ 75#define ET_NONE 0 /* Unknown type. */ 76#define ET_REL 1 /* Relocatable. */ 77#define ET_EXEC 2 /* Executable. */ 78#define ET_DYN 3 /* Shared object. */ 79#define ET_CORE 4 /* Core file. */ 80 81/* Values for e_machine. */ 82#define EM_NONE 0 /* Unknown machine. */ 83#define EM_M32 1 /* AT&T WE32100. */ 84#define EM_SPARC 2 /* Sun SPARC. */ 85#define EM_386 3 /* Intel i386. */ 86#define EM_68K 4 /* Motorola 68000. */ 87#define EM_88K 5 /* Motorola 88000. */ 88#define EM_486 6 /* Intel i486. */ 89#define EM_860 7 /* Intel i860. */ 90#define EM_MIPS 8 /* MIPS R3000 Big-Endian only */ 91 92/* Extensions */ 93#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ 94#define EM_SPARC64 11 /* SPARC v9 64-bit unoffical */ 95#define EM_PARISC 15 /* HPPA */ 96#define EM_PPC 20 /* PowerPC */ 97#define EM_ALPHA 0x9026 /* Alpha */ 98 99/* Special section indexes. */ 100#define SHN_UNDEF 0 /* Undefined, missing, irrelevant. */ 101#define SHN_LORESERVE 0xff00 /* First of reserved range. */ 102#define SHN_LOPROC 0xff00 /* First processor-specific. */ 103#define SHN_HIPROC 0xff1f /* Last processor-specific. */ 104#define SHN_ABS 0xfff1 /* Absolute values. */ 105#define SHN_COMMON 0xfff2 /* Common data. */ 106#define SHN_HIRESERVE 0xffff /* Last of reserved range. */ 107 108/* sh_type */ 109#define SHT_NULL 0 /* inactive */ 110#define SHT_PROGBITS 1 /* program defined information */ 111#define SHT_SYMTAB 2 /* symbol table section */ 112#define SHT_STRTAB 3 /* string table section */ 113#define SHT_RELA 4 /* relocation section with addends*/ 114#define SHT_HASH 5 /* symbol hash table section */ 115#define SHT_DYNAMIC 6 /* dynamic section */ 116#define SHT_NOTE 7 /* note section */ 117#define SHT_NOBITS 8 /* no space section */ 118#define SHT_REL 9 /* relation section without addends */ 119#define SHT_SHLIB 10 /* reserved - purpose unknown */ 120#define SHT_DYNSYM 11 /* dynamic symbol table section */ 121#define SHT_LOPROC 0x70000000 /* reserved range for processor */ 122#define SHT_HIPROC 0x7fffffff /* specific section header types */ 123#define SHT_LOUSER 0x80000000 /* reserved range for application */ 124#define SHT_HIUSER 0xffffffff /* specific indexes */ 125 126/* Flags for sh_flags. */ 127#define SHF_WRITE 0x1 /* Section contains writable data. */ 128#define SHF_ALLOC 0x2 /* Section occupies memory. */ 129#define SHF_EXECINSTR 0x4 /* Section contains instructions. */ 130#define SHF_MASKPROC 0xf0000000 /* Reserved for processor-specific. */ 131 132/* Values for p_type. */ 133#define PT_NULL 0 /* Unused entry. */ 134#define PT_LOAD 1 /* Loadable segment. */ 135#define PT_DYNAMIC 2 /* Dynamic linking information segment. */ 136#define PT_INTERP 3 /* Pathname of interpreter. */ 137#define PT_NOTE 4 /* Auxiliary information. */ 138#define PT_SHLIB 5 /* Reserved (not used). */ 139#define PT_PHDR 6 /* Location of program header itself. */ 140 141#define PT_COUNT 7 /* Number of defined p_type values. */ 142 143#define PT_LOPROC 0x70000000 /* First processor-specific type. */ 144#define PT_HIPROC 0x7fffffff /* Last processor-specific type. */ 145 146/* Values for p_flags. */ 147#define PF_X 0x1 /* Executable. */ 148#define PF_W 0x2 /* Writable. */ 149#define PF_R 0x4 /* Readable. */ 150 151/* Values for d_tag. */ 152#define DT_NULL 0 /* Terminating entry. */ 153#define DT_NEEDED 1 /* String table offset of a needed shared 154 library. */ 155#define DT_PLTRELSZ 2 /* Total size in bytes of PLT relocations. */ 156#define DT_PLTGOT 3 /* Processor-dependent address. */ 157#define DT_HASH 4 /* Address of symbol hash table. */ 158#define DT_STRTAB 5 /* Address of string table. */ 159#define DT_SYMTAB 6 /* Address of symbol table. */ 160#define DT_RELA 7 /* Address of ElfNN_Rela relocations. */ 161#define DT_RELASZ 8 /* Total size of ElfNN_Rela relocations. */ 162#define DT_RELAENT 9 /* Size of each ElfNN_Rela relocation entry. */ 163#define DT_STRSZ 10 /* Size of string table. */ 164#define DT_SYMENT 11 /* Size of each symbol table entry. */ 165#define DT_INIT 12 /* Address of initialization function. */ 166#define DT_FINI 13 /* Address of finalization function. */ 167#define DT_SONAME 14 /* String table offset of shared object 168 name. */ 169#define DT_RPATH 15 /* String table offset of library path. */ 170#define DT_SYMBOLIC 16 /* Indicates "symbolic" linking. */ 171#define DT_REL 17 /* Address of ElfNN_Rel relocations. */ 172#define DT_RELSZ 18 /* Total size of ElfNN_Rel relocations. */ 173#define DT_RELENT 19 /* Size of each ElfNN_Rel relocation. */ 174#define DT_PLTREL 20 /* Type of relocation used for PLT. */ 175#define DT_DEBUG 21 /* Reserved (not used). */ 176#define DT_TEXTREL 22 /* Indicates there may be relocations in 177 non-writable segments. */ 178#define DT_JMPREL 23 /* Address of PLT relocations. */ 179 180#define DT_COUNT 24 /* Number of defined d_tag values. */ 181 182/* Values for n_type. Used in core files. */ 183#define NT_PRSTATUS 1 /* Process status. */ 184#define NT_FPREGSET 2 /* Floating point registers. */ 185#define NT_PRPSINFO 3 /* Process state info. */ 186 187/* Symbol Binding - ELFNN_ST_BIND - st_info */ 188#define STB_LOCAL 0 /* Local symbol */ 189#define STB_GLOBAL 1 /* Global symbol */ 190#define STB_WEAK 2 /* like global - lower precedence */ 191#define STB_LOPROC 13 /* reserved range for processor */ 192#define STB_HIPROC 15 /* specific symbol bindings */ 193 194/* Symbol type - ELFNN_ST_TYPE - st_info */ 195#define STT_NOTYPE 0 /* Unspecified type. */ 196#define STT_OBJECT 1 /* Data object. */ 197#define STT_FUNC 2 /* Function. */ 198#define STT_SECTION 3 /* Section. */ 199#define STT_FILE 4 /* Source file. */ 200#define STT_LOPROC 13 /* reserved range for processor */ 201#define STT_HIPROC 15 /* specific symbol types */ 202 203/* Special symbol table indexes. */ 204#define STN_UNDEF 0 /* Undefined symbol index. */ 205 206#endif /* !_SYS_ELF_COMMON_H_ */ 207