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 9 struct 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. */ 19 typedef __u32 Elf32_Addr; 20 typedef __u16 Elf32_Half; 21 typedef __u32 Elf32_Off; 22 typedef __s32 Elf32_Sword; 23 typedef __u32 Elf32_Word; 24 25 /* 64-bit ELF base types. */ 26 typedef __u64 Elf64_Addr; 27 typedef __u16 Elf64_Half; 28 typedef __s16 Elf64_SHalf; 29 typedef __u64 Elf64_Off; 30 typedef __s32 Elf64_Sword; 31 typedef __u32 Elf64_Word; 32 typedef __u64 Elf64_Xword; 33 typedef __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) 108 109 typedef 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; 116 117 typedef 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) 131 132 typedef struct elf32_rel { 133 Elf32_Addr r_offset; 134 Elf32_Word r_info; 135 } Elf32_Rel; 136 137 typedef 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; 141 142 typedef struct elf32_rela{ 143 Elf32_Addr r_offset; 144 Elf32_Word r_info; 145 Elf32_Sword r_addend; 146 } Elf32_Rela; 147 148 typedef 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; 153 154 typedef 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; 162 163 typedef 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 16 174 175 typedef 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; 191 192 typedef 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 214 215 typedef 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; 225 226 typedef 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 270 271 typedef 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; 283 284 typedef 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 */ 344 typedef 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 */ 351 typedef 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 358 359 extern 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 366 367 extern 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 376 static inline int arch_notes_size(void) { return 0; } 377 static 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