elf.h revision 6cf24f031bc97cb5a7c9df3b6e73c45b628b2b28
1#ifndef _LINUX_ELF_H 2#define _LINUX_ELF_H 3 4#include <linux/types.h> 5#include <linux/auxvec.h> 6#include <linux/elf-em.h> 7#include <asm/elf.h> 8 9struct file; 10 11#ifndef elf_read_implies_exec 12 /* Executables for which elf_read_implies_exec() returns TRUE will 13 have the READ_IMPLIES_EXEC personality flag set automatically. 14 Override in asm/elf.h as needed. */ 15# define elf_read_implies_exec(ex, have_pt_gnu_stack) 0 16#endif 17 18/* 32-bit ELF base types. */ 19typedef __u32 Elf32_Addr; 20typedef __u16 Elf32_Half; 21typedef __u32 Elf32_Off; 22typedef __s32 Elf32_Sword; 23typedef __u32 Elf32_Word; 24 25/* 64-bit ELF base types. */ 26typedef __u64 Elf64_Addr; 27typedef __u16 Elf64_Half; 28typedef __s16 Elf64_SHalf; 29typedef __u64 Elf64_Off; 30typedef __s32 Elf64_Sword; 31typedef __u32 Elf64_Word; 32typedef __u64 Elf64_Xword; 33typedef __s64 Elf64_Sxword; 34 35/* These constants are for the segment types stored in the image headers */ 36#define PT_NULL 0 37#define PT_LOAD 1 38#define PT_DYNAMIC 2 39#define PT_INTERP 3 40#define PT_NOTE 4 41#define PT_SHLIB 5 42#define PT_PHDR 6 43#define PT_TLS 7 /* Thread local storage segment */ 44#define PT_LOOS 0x60000000 /* OS-specific */ 45#define PT_HIOS 0x6fffffff /* OS-specific */ 46#define PT_LOPROC 0x70000000 47#define PT_HIPROC 0x7fffffff 48#define PT_GNU_EH_FRAME 0x6474e550 49 50#define PT_GNU_STACK (PT_LOOS + 0x474e551) 51 52/* These constants define the different elf file types */ 53#define ET_NONE 0 54#define ET_REL 1 55#define ET_EXEC 2 56#define ET_DYN 3 57#define ET_CORE 4 58#define ET_LOPROC 0xff00 59#define ET_HIPROC 0xffff 60 61/* This is the info that is needed to parse the dynamic section of the file */ 62#define DT_NULL 0 63#define DT_NEEDED 1 64#define DT_PLTRELSZ 2 65#define DT_PLTGOT 3 66#define DT_HASH 4 67#define DT_STRTAB 5 68#define DT_SYMTAB 6 69#define DT_RELA 7 70#define DT_RELASZ 8 71#define DT_RELAENT 9 72#define DT_STRSZ 10 73#define DT_SYMENT 11 74#define DT_INIT 12 75#define DT_FINI 13 76#define DT_SONAME 14 77#define DT_RPATH 15 78#define DT_SYMBOLIC 16 79#define DT_REL 17 80#define DT_RELSZ 18 81#define DT_RELENT 19 82#define DT_PLTREL 20 83#define DT_DEBUG 21 84#define DT_TEXTREL 22 85#define DT_JMPREL 23 86#define DT_LOPROC 0x70000000 87#define DT_HIPROC 0x7fffffff 88 89/* This info is needed when parsing the symbol table */ 90#define STB_LOCAL 0 91#define STB_GLOBAL 1 92#define STB_WEAK 2 93 94#define STT_NOTYPE 0 95#define STT_OBJECT 1 96#define STT_FUNC 2 97#define STT_SECTION 3 98#define STT_FILE 4 99#define STT_COMMON 5 100#define STT_TLS 6 101 102#define ELF_ST_BIND(x) ((x) >> 4) 103#define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf) 104#define ELF32_ST_BIND(x) ELF_ST_BIND(x) 105#define ELF32_ST_TYPE(x) ELF_ST_TYPE(x) 106#define ELF64_ST_BIND(x) ELF_ST_BIND(x) 107#define ELF64_ST_TYPE(x) ELF_ST_TYPE(x) 108 109typedef struct dynamic{ 110 Elf32_Sword d_tag; 111 union{ 112 Elf32_Sword d_val; 113 Elf32_Addr d_ptr; 114 } d_un; 115} Elf32_Dyn; 116 117typedef struct { 118 Elf64_Sxword d_tag; /* entry tag value */ 119 union { 120 Elf64_Xword d_val; 121 Elf64_Addr d_ptr; 122 } d_un; 123} Elf64_Dyn; 124 125/* The following are used with relocations */ 126#define ELF32_R_SYM(x) ((x) >> 8) 127#define ELF32_R_TYPE(x) ((x) & 0xff) 128 129#define ELF64_R_SYM(i) ((i) >> 32) 130#define ELF64_R_TYPE(i) ((i) & 0xffffffff) 131 132typedef struct elf32_rel { 133 Elf32_Addr r_offset; 134 Elf32_Word r_info; 135} Elf32_Rel; 136 137typedef struct elf64_rel { 138 Elf64_Addr r_offset; /* Location at which to apply the action */ 139 Elf64_Xword r_info; /* index and type of relocation */ 140} Elf64_Rel; 141 142typedef struct elf32_rela{ 143 Elf32_Addr r_offset; 144 Elf32_Word r_info; 145 Elf32_Sword r_addend; 146} Elf32_Rela; 147 148typedef struct elf64_rela { 149 Elf64_Addr r_offset; /* Location at which to apply the action */ 150 Elf64_Xword r_info; /* index and type of relocation */ 151 Elf64_Sxword r_addend; /* Constant addend used to compute value */ 152} Elf64_Rela; 153 154typedef struct elf32_sym{ 155 Elf32_Word st_name; 156 Elf32_Addr st_value; 157 Elf32_Word st_size; 158 unsigned char st_info; 159 unsigned char st_other; 160 Elf32_Half st_shndx; 161} Elf32_Sym; 162 163typedef struct elf64_sym { 164 Elf64_Word st_name; /* Symbol name, index in string tbl */ 165 unsigned char st_info; /* Type and binding attributes */ 166 unsigned char st_other; /* No defined meaning, 0 */ 167 Elf64_Half st_shndx; /* Associated section index */ 168 Elf64_Addr st_value; /* Value of the symbol */ 169 Elf64_Xword st_size; /* Associated symbol size */ 170} Elf64_Sym; 171 172 173#define EI_NIDENT 16 174 175typedef struct elf32_hdr{ 176 unsigned char e_ident[EI_NIDENT]; 177 Elf32_Half e_type; 178 Elf32_Half e_machine; 179 Elf32_Word e_version; 180 Elf32_Addr e_entry; /* Entry point */ 181 Elf32_Off e_phoff; 182 Elf32_Off e_shoff; 183 Elf32_Word e_flags; 184 Elf32_Half e_ehsize; 185 Elf32_Half e_phentsize; 186 Elf32_Half e_phnum; 187 Elf32_Half e_shentsize; 188 Elf32_Half e_shnum; 189 Elf32_Half e_shstrndx; 190} Elf32_Ehdr; 191 192typedef struct elf64_hdr { 193 unsigned char e_ident[16]; /* ELF "magic number" */ 194 Elf64_Half e_type; 195 Elf64_Half e_machine; 196 Elf64_Word e_version; 197 Elf64_Addr e_entry; /* Entry point virtual address */ 198 Elf64_Off e_phoff; /* Program header table file offset */ 199 Elf64_Off e_shoff; /* Section header table file offset */ 200 Elf64_Word e_flags; 201 Elf64_Half e_ehsize; 202 Elf64_Half e_phentsize; 203 Elf64_Half e_phnum; 204 Elf64_Half e_shentsize; 205 Elf64_Half e_shnum; 206 Elf64_Half e_shstrndx; 207} Elf64_Ehdr; 208 209/* These constants define the permissions on sections in the program 210 header, p_flags. */ 211#define PF_R 0x4 212#define PF_W 0x2 213#define PF_X 0x1 214 215typedef struct elf32_phdr{ 216 Elf32_Word p_type; 217 Elf32_Off p_offset; 218 Elf32_Addr p_vaddr; 219 Elf32_Addr p_paddr; 220 Elf32_Word p_filesz; 221 Elf32_Word p_memsz; 222 Elf32_Word p_flags; 223 Elf32_Word p_align; 224} Elf32_Phdr; 225 226typedef struct elf64_phdr { 227 Elf64_Word p_type; 228 Elf64_Word p_flags; 229 Elf64_Off p_offset; /* Segment file offset */ 230 Elf64_Addr p_vaddr; /* Segment virtual address */ 231 Elf64_Addr p_paddr; /* Segment physical address */ 232 Elf64_Xword p_filesz; /* Segment size in file */ 233 Elf64_Xword p_memsz; /* Segment size in memory */ 234 Elf64_Xword p_align; /* Segment alignment, file & memory */ 235} Elf64_Phdr; 236 237/* sh_type */ 238#define SHT_NULL 0 239#define SHT_PROGBITS 1 240#define SHT_SYMTAB 2 241#define SHT_STRTAB 3 242#define SHT_RELA 4 243#define SHT_HASH 5 244#define SHT_DYNAMIC 6 245#define SHT_NOTE 7 246#define SHT_NOBITS 8 247#define SHT_REL 9 248#define SHT_SHLIB 10 249#define SHT_DYNSYM 11 250#define SHT_NUM 12 251#define SHT_LOPROC 0x70000000 252#define SHT_HIPROC 0x7fffffff 253#define SHT_LOUSER 0x80000000 254#define SHT_HIUSER 0xffffffff 255 256/* sh_flags */ 257#define SHF_WRITE 0x1 258#define SHF_ALLOC 0x2 259#define SHF_EXECINSTR 0x4 260#define SHF_MASKPROC 0xf0000000 261 262/* special section indexes */ 263#define SHN_UNDEF 0 264#define SHN_LORESERVE 0xff00 265#define SHN_LOPROC 0xff00 266#define SHN_HIPROC 0xff1f 267#define SHN_ABS 0xfff1 268#define SHN_COMMON 0xfff2 269#define SHN_HIRESERVE 0xffff 270 271typedef struct { 272 Elf32_Word sh_name; 273 Elf32_Word sh_type; 274 Elf32_Word sh_flags; 275 Elf32_Addr sh_addr; 276 Elf32_Off sh_offset; 277 Elf32_Word sh_size; 278 Elf32_Word sh_link; 279 Elf32_Word sh_info; 280 Elf32_Word sh_addralign; 281 Elf32_Word sh_entsize; 282} Elf32_Shdr; 283 284typedef struct elf64_shdr { 285 Elf64_Word sh_name; /* Section name, index in string tbl */ 286 Elf64_Word sh_type; /* Type of section */ 287 Elf64_Xword sh_flags; /* Miscellaneous section attributes */ 288 Elf64_Addr sh_addr; /* Section virtual addr at execution */ 289 Elf64_Off sh_offset; /* Section file offset */ 290 Elf64_Xword sh_size; /* Size of section in bytes */ 291 Elf64_Word sh_link; /* Index of another section */ 292 Elf64_Word sh_info; /* Additional section information */ 293 Elf64_Xword sh_addralign; /* Section alignment */ 294 Elf64_Xword sh_entsize; /* Entry size if section holds table */ 295} Elf64_Shdr; 296 297#define EI_MAG0 0 /* e_ident[] indexes */ 298#define EI_MAG1 1 299#define EI_MAG2 2 300#define EI_MAG3 3 301#define EI_CLASS 4 302#define EI_DATA 5 303#define EI_VERSION 6 304#define EI_OSABI 7 305#define EI_PAD 8 306 307#define ELFMAG0 0x7f /* EI_MAG */ 308#define ELFMAG1 'E' 309#define ELFMAG2 'L' 310#define ELFMAG3 'F' 311#define ELFMAG "\177ELF" 312#define SELFMAG 4 313 314#define ELFCLASSNONE 0 /* EI_CLASS */ 315#define ELFCLASS32 1 316#define ELFCLASS64 2 317#define ELFCLASSNUM 3 318 319#define ELFDATANONE 0 /* e_ident[EI_DATA] */ 320#define ELFDATA2LSB 1 321#define ELFDATA2MSB 2 322 323#define EV_NONE 0 /* e_version, EI_VERSION */ 324#define EV_CURRENT 1 325#define EV_NUM 2 326 327#define ELFOSABI_NONE 0 328#define ELFOSABI_LINUX 3 329 330#ifndef ELF_OSABI 331#define ELF_OSABI ELFOSABI_NONE 332#endif 333 334/* Notes used in ET_CORE */ 335#define NT_PRSTATUS 1 336#define NT_PRFPREG 2 337#define NT_PRPSINFO 3 338#define NT_TASKSTRUCT 4 339#define NT_AUXV 6 340#define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */ 341 342 343/* Note header in a PT_NOTE section */ 344typedef struct elf32_note { 345 Elf32_Word n_namesz; /* Name size */ 346 Elf32_Word n_descsz; /* Content size */ 347 Elf32_Word n_type; /* Content type */ 348} Elf32_Nhdr; 349 350/* Note header in a PT_NOTE section */ 351typedef struct elf64_note { 352 Elf64_Word n_namesz; /* Name size */ 353 Elf64_Word n_descsz; /* Content size */ 354 Elf64_Word n_type; /* Content type */ 355} Elf64_Nhdr; 356 357#if ELF_CLASS == ELFCLASS32 358 359extern Elf32_Dyn _DYNAMIC []; 360#define elfhdr elf32_hdr 361#define elf_phdr elf32_phdr 362#define elf_note elf32_note 363#define elf_addr_t Elf32_Off 364 365#else 366 367extern Elf64_Dyn _DYNAMIC []; 368#define elfhdr elf64_hdr 369#define elf_phdr elf64_phdr 370#define elf_note elf64_note 371#define elf_addr_t Elf64_Off 372 373#endif 374 375#ifndef ARCH_HAVE_EXTRA_ELF_NOTES 376static inline int arch_notes_size(void) { return 0; } 377static inline void arch_write_notes(struct file *file) { } 378 379#define ELF_CORE_EXTRA_NOTES_SIZE arch_notes_size() 380#define ELF_CORE_WRITE_EXTRA_NOTES arch_write_notes(file) 381#endif /* ARCH_HAVE_EXTRA_ELF_NOTES */ 382 383#endif /* _LINUX_ELF_H */ 384