elf_common.h revision 116511
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 * $FreeBSD: head/sys/sys/elf_common.h 116511 2003-06-18 03:34:29Z mdodd $ 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/* 37 * Note header. The ".note" section contains an array of notes. Each 38 * begins with this header, aligned to a word boundary. Immediately 39 * following the note header is n_namesz bytes of name, padded to the 40 * next word boundary. Then comes n_descsz bytes of descriptor, again 41 * padded to a word boundary. The values of n_namesz and n_descsz do 42 * not include the padding. 43 */ 44 45typedef struct { 46 u_int32_t n_namesz; /* Length of name. */ 47 u_int32_t n_descsz; /* Length of descriptor. */ 48 u_int32_t n_type; /* Type of this note. */ 49} Elf_Note; 50 51/* Indexes into the e_ident array. Keep synced with 52 http://www.sco.com/developer/gabi/ch4.eheader.html */ 53#define EI_MAG0 0 /* Magic number, byte 0. */ 54#define EI_MAG1 1 /* Magic number, byte 1. */ 55#define EI_MAG2 2 /* Magic number, byte 2. */ 56#define EI_MAG3 3 /* Magic number, byte 3. */ 57#define EI_CLASS 4 /* Class of machine. */ 58#define EI_DATA 5 /* Data format. */ 59#define EI_VERSION 6 /* ELF format version. */ 60#define EI_OSABI 7 /* Operating system / ABI identification */ 61#define EI_ABIVERSION 8 /* ABI version */ 62#define OLD_EI_BRAND 8 /* Start of architecture identification. */ 63#define EI_PAD 9 /* Start of padding (per SVR4 ABI). */ 64#define EI_NIDENT 16 /* Size of e_ident array. */ 65 66/* Values for the magic number bytes. */ 67#define ELFMAG0 0x7f 68#define ELFMAG1 'E' 69#define ELFMAG2 'L' 70#define ELFMAG3 'F' 71#define ELFMAG "\177ELF" /* magic string */ 72#define SELFMAG 4 /* magic string size */ 73 74/* Values for e_ident[EI_VERSION] and e_version. */ 75#define EV_NONE 0 76#define EV_CURRENT 1 77 78/* Values for e_ident[EI_CLASS]. */ 79#define ELFCLASSNONE 0 /* Unknown class. */ 80#define ELFCLASS32 1 /* 32-bit architecture. */ 81#define ELFCLASS64 2 /* 64-bit architecture. */ 82 83/* Values for e_ident[EI_DATA]. */ 84#define ELFDATANONE 0 /* Unknown data format. */ 85#define ELFDATA2LSB 1 /* 2's complement little-endian. */ 86#define ELFDATA2MSB 2 /* 2's complement big-endian. */ 87 88/* Values for e_ident[EI_OSABI]. */ 89#define ELFOSABI_SYSV 0 /* UNIX System V ABI */ 90#define ELFOSABI_NONE ELFOSABI_SYSV /* symbol used in old spec */ 91#define ELFOSABI_HPUX 1 /* HP-UX operating system */ 92#define ELFOSABI_NETBSD 2 /* NetBSD */ 93#define ELFOSABI_LINUX 3 /* GNU/Linux */ 94#define ELFOSABI_HURD 4 /* GNU/Hurd */ 95#define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */ 96#define ELFOSABI_SOLARIS 6 /* Solaris */ 97#define ELFOSABI_MONTEREY 7 /* Monterey */ 98#define ELFOSABI_IRIX 8 /* IRIX */ 99#define ELFOSABI_FREEBSD 9 /* FreeBSD */ 100#define ELFOSABI_TRU64 10 /* TRU64 UNIX */ 101#define ELFOSABI_MODESTO 11 /* Novell Modesto */ 102#define ELFOSABI_OPENBSD 12 /* OpenBSD */ 103#define ELFOSABI_ARM 97 /* ARM */ 104#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */ 105 106/* e_ident */ 107#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \ 108 (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \ 109 (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \ 110 (ehdr).e_ident[EI_MAG3] == ELFMAG3) 111 112/* Values for e_type. */ 113#define ET_NONE 0 /* Unknown type. */ 114#define ET_REL 1 /* Relocatable. */ 115#define ET_EXEC 2 /* Executable. */ 116#define ET_DYN 3 /* Shared object. */ 117#define ET_CORE 4 /* Core file. */ 118 119/* Values for e_machine. */ 120#define EM_NONE 0 /* Unknown machine. */ 121#define EM_M32 1 /* AT&T WE32100. */ 122#define EM_SPARC 2 /* Sun SPARC. */ 123#define EM_386 3 /* Intel i386. */ 124#define EM_68K 4 /* Motorola 68000. */ 125#define EM_88K 5 /* Motorola 88000. */ 126#define EM_486 6 /* Intel i486. */ 127#define EM_860 7 /* Intel i860. */ 128#define EM_MIPS 8 /* MIPS R3000 Big-Endian only */ 129 130/* Extensions. This list is not complete. */ 131#define EM_S370 9 /* IBM System/370 */ 132#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ /* Depreciated */ 133#define EM_PARISC 15 /* HPPA */ 134#define EM_SPARC32PLUS 18 /* SPARC v8plus */ 135#define EM_PPC 20 /* PowerPC 32-bit */ 136#define EM_PPC64 21 /* PowerPC 64-bit */ 137#define EM_ARM 40 /* ARM */ 138#define EM_SPARCV9 43 /* SPARC v9 64-bit */ 139#define EM_IA_64 50 /* Intel IA-46 Processor */ 140#define EM_X86_64 62 /* Advanced Micro Devices x86-64 */ 141#define EM_ALPHA 0x9026 /* Alpha (written in the absence of an ABI */ 142 143/* Special section indexes. */ 144#define SHN_UNDEF 0 /* Undefined, missing, irrelevant. */ 145#define SHN_LORESERVE 0xff00 /* First of reserved range. */ 146#define SHN_LOPROC 0xff00 /* First processor-specific. */ 147#define SHN_HIPROC 0xff1f /* Last processor-specific. */ 148#define SHN_ABS 0xfff1 /* Absolute values. */ 149#define SHN_COMMON 0xfff2 /* Common data. */ 150#define SHN_HIRESERVE 0xffff /* Last of reserved range. */ 151 152/* sh_type */ 153#define SHT_NULL 0 /* inactive */ 154#define SHT_PROGBITS 1 /* program defined information */ 155#define SHT_SYMTAB 2 /* symbol table section */ 156#define SHT_STRTAB 3 /* string table section */ 157#define SHT_RELA 4 /* relocation section with addends */ 158#define SHT_HASH 5 /* symbol hash table section */ 159#define SHT_DYNAMIC 6 /* dynamic section */ 160#define SHT_NOTE 7 /* note section */ 161#define SHT_NOBITS 8 /* no space section */ 162#define SHT_REL 9 /* relocation section - no addends */ 163#define SHT_SHLIB 10 /* reserved - purpose unknown */ 164#define SHT_DYNSYM 11 /* dynamic symbol table section */ 165#define SHT_NUM 12 /* number of section types */ 166#define SHT_LOOS 0x60000000 /* First of OS specific semantics */ 167#define SHT_HIOS 0x6fffffff /* Last of OS specific semantics */ 168#define SHT_LOPROC 0x70000000 /* reserved range for processor */ 169#define SHT_HIPROC 0x7fffffff /* specific section header types */ 170#define SHT_LOUSER 0x80000000 /* reserved range for application */ 171#define SHT_HIUSER 0xffffffff /* specific indexes */ 172 173/* Flags for sh_flags. */ 174#define SHF_WRITE 0x1 /* Section contains writable data. */ 175#define SHF_ALLOC 0x2 /* Section occupies memory. */ 176#define SHF_EXECINSTR 0x4 /* Section contains instructions. */ 177#define SHF_MASKPROC 0xf0000000 /* Reserved for processor-specific. */ 178 179/* Values for p_type. */ 180#define PT_NULL 0 /* Unused entry. */ 181#define PT_LOAD 1 /* Loadable segment. */ 182#define PT_DYNAMIC 2 /* Dynamic linking information segment. */ 183#define PT_INTERP 3 /* Pathname of interpreter. */ 184#define PT_NOTE 4 /* Auxiliary information. */ 185#define PT_SHLIB 5 /* Reserved (not used). */ 186#define PT_PHDR 6 /* Location of program header itself. */ 187#define PT_TLS 7 /* Thread local storage segment */ 188 189#define PT_COUNT 8 /* Number of defined p_type values. */ 190 191#define PT_LOOS 0x60000000 /* OS-specific */ 192#define PT_HIOS 0x6fffffff /* OS-specific */ 193#define PT_LOPROC 0x70000000 /* First processor-specific type. */ 194#define PT_HIPROC 0x7fffffff /* Last processor-specific type. */ 195 196/* Values for p_flags. */ 197#define PF_X 0x1 /* Executable. */ 198#define PF_W 0x2 /* Writable. */ 199#define PF_R 0x4 /* Readable. */ 200 201/* Values for d_tag. */ 202#define DT_NULL 0 /* Terminating entry. */ 203#define DT_NEEDED 1 /* String table offset of a needed shared 204 library. */ 205#define DT_PLTRELSZ 2 /* Total size in bytes of PLT relocations. */ 206#define DT_PLTGOT 3 /* Processor-dependent address. */ 207#define DT_HASH 4 /* Address of symbol hash table. */ 208#define DT_STRTAB 5 /* Address of string table. */ 209#define DT_SYMTAB 6 /* Address of symbol table. */ 210#define DT_RELA 7 /* Address of ElfNN_Rela relocations. */ 211#define DT_RELASZ 8 /* Total size of ElfNN_Rela relocations. */ 212#define DT_RELAENT 9 /* Size of each ElfNN_Rela relocation entry. */ 213#define DT_STRSZ 10 /* Size of string table. */ 214#define DT_SYMENT 11 /* Size of each symbol table entry. */ 215#define DT_INIT 12 /* Address of initialization function. */ 216#define DT_FINI 13 /* Address of finalization function. */ 217#define DT_SONAME 14 /* String table offset of shared object 218 name. */ 219#define DT_RPATH 15 /* String table offset of library path. [sup] */ 220#define DT_SYMBOLIC 16 /* Indicates "symbolic" linking. [sup] */ 221#define DT_REL 17 /* Address of ElfNN_Rel relocations. */ 222#define DT_RELSZ 18 /* Total size of ElfNN_Rel relocations. */ 223#define DT_RELENT 19 /* Size of each ElfNN_Rel relocation. */ 224#define DT_PLTREL 20 /* Type of relocation used for PLT. */ 225#define DT_DEBUG 21 /* Reserved (not used). */ 226#define DT_TEXTREL 22 /* Indicates there may be relocations in 227 non-writable segments. [sup] */ 228#define DT_JMPREL 23 /* Address of PLT relocations. */ 229#define DT_BIND_NOW 24 /* [sup] */ 230#define DT_INIT_ARRAY 25 /* Address of the array of pointers to 231 initialization functions */ 232#define DT_FINI_ARRAY 26 /* Address of the array of pointers to 233 termination functions */ 234#define DT_INIT_ARRAYSZ 27 /* Size in bytes of the array of 235 initialization functions. */ 236#define DT_FINI_ARRAYSZ 28 /* Size in bytes of the array of 237 terminationfunctions. */ 238#define DT_RUNPATH 29 /* String table offset of a null-terminated 239 library search path string. */ 240#define DT_FLAGS 30 /* Object specific flag values. 241#define DT_ENCODING 32 /* Values greater than or equal to DT_ENCODING 242 and less than DT_LOOS follow the rules for 243 the interpretation of the d_un union 244 as follows: even == 'd_ptr', even == 'd_val' 245 or none */ 246#define DT_PREINIT_ARRAY 32 /* Address of the array of pointers to 247 pre-initialization functions. */ 248#define DT_PREINIT_ARRAYSZ 33 /* Size in bytes of the array of 249 pre-initialization functions. */ 250 251#define DT_COUNT 33 /* Number of defined d_tag values. */ 252 253#define DT_LOOS 0x6000000d /* First OS-specific */ 254#define DT_HIOS 0x6fff0000 /* Last OS-specific */ 255#define DT_LOPROC 0x70000000 /* First processor-specific type. */ 256#define DT_HIPROC 0x7fffffff /* Last processor-specific type. */ 257 258/* Values for DT_FLAGS */ 259#define DF_ORIGIN 0x0001 /* Indicates that the object being loaded may 260 make reference to the $ORIGIN substitution 261 string */ 262#define DF_SYMBOLIC 0x0002 /* Indicates "symbolic" linking. */ 263#define DF_TEXTREL 0x0004 /* Indicates there may be relocations in 264 non-writable segments. */ 265#define DF_BIND_NOW 0x0008 /* Indicates that the dynamic linker should 266 process all relocations for the object 267 containing this entry before transferring 268 control to the program. */ 269#define DF_STATIC_TLS 0x0010 /* Indicates that the shared object or 270 executable contains code using a static 271 thread-local storage scheme. */ 272 273/* Values for n_type. Used in core files. */ 274#define NT_PRSTATUS 1 /* Process status. */ 275#define NT_FPREGSET 2 /* Floating point registers. */ 276#define NT_PRPSINFO 3 /* Process state info. */ 277 278/* Symbol Binding - ELFNN_ST_BIND - st_info */ 279#define STB_LOCAL 0 /* Local symbol */ 280#define STB_GLOBAL 1 /* Global symbol */ 281#define STB_WEAK 2 /* like global - lower precedence */ 282#define STB_LOPROC 13 /* reserved range for processor */ 283#define STB_HIPROC 15 /* specific symbol bindings */ 284 285/* Symbol type - ELFNN_ST_TYPE - st_info */ 286#define STT_NOTYPE 0 /* Unspecified type. */ 287#define STT_OBJECT 1 /* Data object. */ 288#define STT_FUNC 2 /* Function. */ 289#define STT_SECTION 3 /* Section. */ 290#define STT_FILE 4 /* Source file. */ 291#define STT_LOPROC 13 /* reserved range for processor */ 292#define STT_HIPROC 15 /* specific symbol types */ 293 294/* Special symbol table indexes. */ 295#define STN_UNDEF 0 /* Undefined symbol index. */ 296 297#endif /* !_SYS_ELF_COMMON_H_ */ 298