elf.h revision e55014923e65e4ee8e477a1212381cca0125f3aa
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_ENCODING 32 87#define OLD_DT_LOOS 0x60000000 88#define DT_LOOS 0x6000000d 89#define DT_HIOS 0x6ffff000 90#define DT_VALRNGLO 0x6ffffd00 91#define DT_VALRNGHI 0x6ffffdff 92#define DT_ADDRRNGLO 0x6ffffe00 93#define DT_ADDRRNGHI 0x6ffffeff 94#define DT_VERSYM 0x6ffffff0 95#define DT_RELACOUNT 0x6ffffff9 96#define DT_RELCOUNT 0x6ffffffa 97#define DT_FLAGS_1 0x6ffffffb 98#define DT_VERDEF 0x6ffffffc 99#define DT_VERDEFNUM 0x6ffffffd 100#define DT_VERNEED 0x6ffffffe 101#define DT_VERNEEDNUM 0x6fffffff 102#define OLD_DT_HIOS 0x6fffffff 103#define DT_LOPROC 0x70000000 104#define DT_HIPROC 0x7fffffff 105 106/* This info is needed when parsing the symbol table */ 107#define STB_LOCAL 0 108#define STB_GLOBAL 1 109#define STB_WEAK 2 110 111#define STT_NOTYPE 0 112#define STT_OBJECT 1 113#define STT_FUNC 2 114#define STT_SECTION 3 115#define STT_FILE 4 116#define STT_COMMON 5 117#define STT_TLS 6 118 119#define ELF_ST_BIND(x) ((x) >> 4) 120#define ELF_ST_TYPE(x) (((unsigned int) x) & 0xf) 121#define ELF32_ST_BIND(x) ELF_ST_BIND(x) 122#define ELF32_ST_TYPE(x) ELF_ST_TYPE(x) 123#define ELF64_ST_BIND(x) ELF_ST_BIND(x) 124#define ELF64_ST_TYPE(x) ELF_ST_TYPE(x) 125 126typedef struct dynamic{ 127 Elf32_Sword d_tag; 128 union{ 129 Elf32_Sword d_val; 130 Elf32_Addr d_ptr; 131 } d_un; 132} Elf32_Dyn; 133 134typedef struct { 135 Elf64_Sxword d_tag; /* entry tag value */ 136 union { 137 Elf64_Xword d_val; 138 Elf64_Addr d_ptr; 139 } d_un; 140} Elf64_Dyn; 141 142/* The following are used with relocations */ 143#define ELF32_R_SYM(x) ((x) >> 8) 144#define ELF32_R_TYPE(x) ((x) & 0xff) 145 146#define ELF64_R_SYM(i) ((i) >> 32) 147#define ELF64_R_TYPE(i) ((i) & 0xffffffff) 148 149typedef struct elf32_rel { 150 Elf32_Addr r_offset; 151 Elf32_Word r_info; 152} Elf32_Rel; 153 154typedef struct elf64_rel { 155 Elf64_Addr r_offset; /* Location at which to apply the action */ 156 Elf64_Xword r_info; /* index and type of relocation */ 157} Elf64_Rel; 158 159typedef struct elf32_rela{ 160 Elf32_Addr r_offset; 161 Elf32_Word r_info; 162 Elf32_Sword r_addend; 163} Elf32_Rela; 164 165typedef struct elf64_rela { 166 Elf64_Addr r_offset; /* Location at which to apply the action */ 167 Elf64_Xword r_info; /* index and type of relocation */ 168 Elf64_Sxword r_addend; /* Constant addend used to compute value */ 169} Elf64_Rela; 170 171typedef struct elf32_sym{ 172 Elf32_Word st_name; 173 Elf32_Addr st_value; 174 Elf32_Word st_size; 175 unsigned char st_info; 176 unsigned char st_other; 177 Elf32_Half st_shndx; 178} Elf32_Sym; 179 180typedef struct elf64_sym { 181 Elf64_Word st_name; /* Symbol name, index in string tbl */ 182 unsigned char st_info; /* Type and binding attributes */ 183 unsigned char st_other; /* No defined meaning, 0 */ 184 Elf64_Half st_shndx; /* Associated section index */ 185 Elf64_Addr st_value; /* Value of the symbol */ 186 Elf64_Xword st_size; /* Associated symbol size */ 187} Elf64_Sym; 188 189 190#define EI_NIDENT 16 191 192typedef struct elf32_hdr{ 193 unsigned char e_ident[EI_NIDENT]; 194 Elf32_Half e_type; 195 Elf32_Half e_machine; 196 Elf32_Word e_version; 197 Elf32_Addr e_entry; /* Entry point */ 198 Elf32_Off e_phoff; 199 Elf32_Off e_shoff; 200 Elf32_Word e_flags; 201 Elf32_Half e_ehsize; 202 Elf32_Half e_phentsize; 203 Elf32_Half e_phnum; 204 Elf32_Half e_shentsize; 205 Elf32_Half e_shnum; 206 Elf32_Half e_shstrndx; 207} Elf32_Ehdr; 208 209typedef struct elf64_hdr { 210 unsigned char e_ident[16]; /* ELF "magic number" */ 211 Elf64_Half e_type; 212 Elf64_Half e_machine; 213 Elf64_Word e_version; 214 Elf64_Addr e_entry; /* Entry point virtual address */ 215 Elf64_Off e_phoff; /* Program header table file offset */ 216 Elf64_Off e_shoff; /* Section header table file offset */ 217 Elf64_Word e_flags; 218 Elf64_Half e_ehsize; 219 Elf64_Half e_phentsize; 220 Elf64_Half e_phnum; 221 Elf64_Half e_shentsize; 222 Elf64_Half e_shnum; 223 Elf64_Half e_shstrndx; 224} Elf64_Ehdr; 225 226/* These constants define the permissions on sections in the program 227 header, p_flags. */ 228#define PF_R 0x4 229#define PF_W 0x2 230#define PF_X 0x1 231 232typedef struct elf32_phdr{ 233 Elf32_Word p_type; 234 Elf32_Off p_offset; 235 Elf32_Addr p_vaddr; 236 Elf32_Addr p_paddr; 237 Elf32_Word p_filesz; 238 Elf32_Word p_memsz; 239 Elf32_Word p_flags; 240 Elf32_Word p_align; 241} Elf32_Phdr; 242 243typedef struct elf64_phdr { 244 Elf64_Word p_type; 245 Elf64_Word p_flags; 246 Elf64_Off p_offset; /* Segment file offset */ 247 Elf64_Addr p_vaddr; /* Segment virtual address */ 248 Elf64_Addr p_paddr; /* Segment physical address */ 249 Elf64_Xword p_filesz; /* Segment size in file */ 250 Elf64_Xword p_memsz; /* Segment size in memory */ 251 Elf64_Xword p_align; /* Segment alignment, file & memory */ 252} Elf64_Phdr; 253 254/* sh_type */ 255#define SHT_NULL 0 256#define SHT_PROGBITS 1 257#define SHT_SYMTAB 2 258#define SHT_STRTAB 3 259#define SHT_RELA 4 260#define SHT_HASH 5 261#define SHT_DYNAMIC 6 262#define SHT_NOTE 7 263#define SHT_NOBITS 8 264#define SHT_REL 9 265#define SHT_SHLIB 10 266#define SHT_DYNSYM 11 267#define SHT_NUM 12 268#define SHT_LOPROC 0x70000000 269#define SHT_HIPROC 0x7fffffff 270#define SHT_LOUSER 0x80000000 271#define SHT_HIUSER 0xffffffff 272 273/* sh_flags */ 274#define SHF_WRITE 0x1 275#define SHF_ALLOC 0x2 276#define SHF_EXECINSTR 0x4 277#define SHF_MASKPROC 0xf0000000 278 279/* special section indexes */ 280#define SHN_UNDEF 0 281#define SHN_LORESERVE 0xff00 282#define SHN_LOPROC 0xff00 283#define SHN_HIPROC 0xff1f 284#define SHN_ABS 0xfff1 285#define SHN_COMMON 0xfff2 286#define SHN_HIRESERVE 0xffff 287 288typedef struct { 289 Elf32_Word sh_name; 290 Elf32_Word sh_type; 291 Elf32_Word sh_flags; 292 Elf32_Addr sh_addr; 293 Elf32_Off sh_offset; 294 Elf32_Word sh_size; 295 Elf32_Word sh_link; 296 Elf32_Word sh_info; 297 Elf32_Word sh_addralign; 298 Elf32_Word sh_entsize; 299} Elf32_Shdr; 300 301typedef struct elf64_shdr { 302 Elf64_Word sh_name; /* Section name, index in string tbl */ 303 Elf64_Word sh_type; /* Type of section */ 304 Elf64_Xword sh_flags; /* Miscellaneous section attributes */ 305 Elf64_Addr sh_addr; /* Section virtual addr at execution */ 306 Elf64_Off sh_offset; /* Section file offset */ 307 Elf64_Xword sh_size; /* Size of section in bytes */ 308 Elf64_Word sh_link; /* Index of another section */ 309 Elf64_Word sh_info; /* Additional section information */ 310 Elf64_Xword sh_addralign; /* Section alignment */ 311 Elf64_Xword sh_entsize; /* Entry size if section holds table */ 312} Elf64_Shdr; 313 314#define EI_MAG0 0 /* e_ident[] indexes */ 315#define EI_MAG1 1 316#define EI_MAG2 2 317#define EI_MAG3 3 318#define EI_CLASS 4 319#define EI_DATA 5 320#define EI_VERSION 6 321#define EI_OSABI 7 322#define EI_PAD 8 323 324#define ELFMAG0 0x7f /* EI_MAG */ 325#define ELFMAG1 'E' 326#define ELFMAG2 'L' 327#define ELFMAG3 'F' 328#define ELFMAG "\177ELF" 329#define SELFMAG 4 330 331#define ELFCLASSNONE 0 /* EI_CLASS */ 332#define ELFCLASS32 1 333#define ELFCLASS64 2 334#define ELFCLASSNUM 3 335 336#define ELFDATANONE 0 /* e_ident[EI_DATA] */ 337#define ELFDATA2LSB 1 338#define ELFDATA2MSB 2 339 340#define EV_NONE 0 /* e_version, EI_VERSION */ 341#define EV_CURRENT 1 342#define EV_NUM 2 343 344#define ELFOSABI_NONE 0 345#define ELFOSABI_LINUX 3 346 347#ifndef ELF_OSABI 348#define ELF_OSABI ELFOSABI_NONE 349#endif 350 351/* Notes used in ET_CORE */ 352#define NT_PRSTATUS 1 353#define NT_PRFPREG 2 354#define NT_PRPSINFO 3 355#define NT_TASKSTRUCT 4 356#define NT_AUXV 6 357#define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */ 358 359 360/* Note header in a PT_NOTE section */ 361typedef struct elf32_note { 362 Elf32_Word n_namesz; /* Name size */ 363 Elf32_Word n_descsz; /* Content size */ 364 Elf32_Word n_type; /* Content type */ 365} Elf32_Nhdr; 366 367/* Note header in a PT_NOTE section */ 368typedef struct elf64_note { 369 Elf64_Word n_namesz; /* Name size */ 370 Elf64_Word n_descsz; /* Content size */ 371 Elf64_Word n_type; /* Content type */ 372} Elf64_Nhdr; 373 374#if ELF_CLASS == ELFCLASS32 375 376extern Elf32_Dyn _DYNAMIC []; 377#define elfhdr elf32_hdr 378#define elf_phdr elf32_phdr 379#define elf_note elf32_note 380#define elf_addr_t Elf32_Off 381 382#else 383 384extern Elf64_Dyn _DYNAMIC []; 385#define elfhdr elf64_hdr 386#define elf_phdr elf64_phdr 387#define elf_note elf64_note 388#define elf_addr_t Elf64_Off 389 390#endif 391 392/* Optional callbacks to write extra ELF notes. */ 393#ifndef ARCH_HAVE_EXTRA_ELF_NOTES 394static inline int elf_coredump_extra_notes_size(void) { return 0; } 395static inline int elf_coredump_extra_notes_write(struct file *file, 396 loff_t *foffset) { return 0; } 397#else 398extern int elf_coredump_extra_notes_size(void); 399extern int elf_coredump_extra_notes_write(struct file *file, loff_t *foffset); 400#endif 401 402#endif /* _LINUX_ELF_H */ 403