1// Elf.h 2 3#ifndef _ELF_H 4#define _ELF_H 5 6// types 7typedef uint32 Elf32_Addr; 8typedef uint16 Elf32_Half; 9typedef uint32 Elf32_Off; 10typedef int32 Elf32_Sword; 11typedef uint32 Elf32_Word; 12 13// e_ident indices 14#define EI_MAG0 0 15#define EI_MAG1 1 16#define EI_MAG2 2 17#define EI_MAG3 3 18#define EI_CLASS 4 19#define EI_DATA 5 20#define EI_VERSION 6 21#define EI_PAD 7 22#define EI_NIDENT 16 23 24// ELF magic 25#define ELFMAG0 0x7f 26#define ELFMAG1 'E' 27#define ELFMAG2 'L' 28#define ELFMAG3 'F' 29 30// class 31#define ELFCLASSNONE 0 32#define ELFCLASS32 1 33#define ELFCLASS64 2 34 35// version 36#define EV_NONE 0 37#define EV_CURRENT 1 38 39// object file header 40typedef struct { 41 unsigned char e_ident[EI_NIDENT]; 42 Elf32_Half e_type; 43 Elf32_Half e_machine; 44 Elf32_Word e_version; 45 Elf32_Addr e_entry; 46 Elf32_Off e_phoff; 47 Elf32_Off e_shoff; 48 Elf32_Word e_flags; 49 Elf32_Half e_ehsize; 50 Elf32_Half e_phentsize; 51 Elf32_Half e_phnum; 52 Elf32_Half e_shentsize; 53 Elf32_Half e_shnum; 54 Elf32_Half e_shstrndx; 55} Elf32_Ehdr; 56 57// e_ident EI_CLASS and EI_DATA values 58#define ELFCLASSNONE 0 59#define ELFCLASS32 1 60#define ELFCLASS64 2 61#define ELFDATANONE 0 62#define ELFDATA2LSB 1 63#define ELFDATA2MSB 2 64 65// special section header indices 66#define SHN_UNDEF 0 67#define SHN_LORESERVE 0xff00 68#define SHN_LOPROC 0xff00 69#define SHN_HIPROC 0xff1f 70#define SHN_ABS 0xfff1 71#define SHN_COMMON 0xfff2 72#define SHN_HIRESERVE 0xffff 73 74// program header 75typedef struct { 76 Elf32_Word p_type; 77 Elf32_Off p_offset; 78 Elf32_Addr p_vaddr; 79 Elf32_Addr p_paddr; 80 Elf32_Word p_filesz; 81 Elf32_Word p_memsz; 82 Elf32_Word p_flags; 83 Elf32_Word p_align; 84} Elf32_Phdr; 85 86// p_type 87#define PT_NULL 0 88#define PT_LOAD 1 89#define PT_DYNAMIC 2 90#define PT_INTERP 3 91#define PT_NOTE 4 92#define PT_SHLIB 5 93#define PT_PHDIR 6 94#define PT_LOPROC 0x70000000 95#define PT_HIPROC 0x7fffffff 96 97// section header 98typedef struct { 99 Elf32_Word sh_name; 100 Elf32_Word sh_type; 101 Elf32_Word sh_flags; 102 Elf32_Addr sh_addr; 103 Elf32_Off sh_offset; 104 Elf32_Word sh_size; 105 Elf32_Word sh_link; 106 Elf32_Word sh_info; 107 Elf32_Word sh_addralign; 108 Elf32_Word sh_entsize; 109} Elf32_Shdr; 110 111// sh_type values 112#define SHT_NULL 0 113#define SHT_PROGBITS 1 114#define SHT_SYMTAB 2 115#define SHT_STRTAB 3 116#define SHT_RELA 4 117#define SHT_HASH 5 118#define SHT_DYNAMIC 6 119#define SHT_NOTE 7 120#define SHT_NOBITS 8 121#define SHT_REL 9 122#define SHT_SHLIB 10 123#define SHT_DYNSYM 11 124#define SHT_LOPROC 0x70000000 125#define SHT_HIPROC 0x7fffffff 126#define SHT_LOUSER 0x80000000 127#define SHT_HIUSER 0xffffffff 128 129// relocation entry 130typedef struct { 131 Elf32_Addr r_offset; 132 Elf32_Word r_info; 133} Elf32_Rel; 134 135// relocation entry with addend 136typedef struct { 137 Elf32_Addr r_offset; 138 Elf32_Word r_info; 139 Elf32_Sword r_addend; 140} Elf32_Rela; 141 142// r_info accessors 143#define ELF32_R_SYM(i) ((i) >> 8) 144#define ELF32_R_TYPE(i) ((unsigned char)(i)) 145#define ELF32_R_INFO(s, t) ((s) << 8 + (unsigned char)(t)) 146 147// relocation types (i368 specific) 148#define R_386_NONE 0 149#define R_386_32 1 150#define R_386_PC32 2 151#define R_386_GOT32 3 152#define R_386_PLT32 4 153#define R_386_COPY 5 154#define R_386_GLOB_DAT 6 155#define R_386_JMP_SLOT 7 156#define R_386_RELATIVE 8 157#define R_386_GOTOFF 9 158#define R_386_GOTPC 10 159 160// symbol table entry 161typedef struct { 162 Elf32_Word st_name; 163 Elf32_Addr st_value; 164 Elf32_Word st_size; 165 Elf32_Word st_info; 166 Elf32_Word st_other; 167 Elf32_Word st_shndx; 168} Elf32_Sym; 169 170// st_info accessors 171#define ELF32_ST_BIND(i) ((i) >> 4) 172#define ELF32_ST_TYPE(i) ((i) & 0xf) 173#define ELF32_ST_INFO(b, t) ((b) << 4 + (t) & 0xf) 174 175// symbol binding 176#define STB_LOCAL 0 177#define STB_GLOBAL 1 178#define STB_WEAK 2 179#define STB_LOPROC 13 180#define STB_HIPROC 15 181 182// symbol types 183#define STT_NOTYPE 0 184#define STT_OBJECT 1 185#define STT_FUNC 2 186#define STT_SECTION 3 187#define STT_FILE 4 188#define STT_LOPROC 13 189#define STT_HIPROC 15 190 191 192#endif // _ELF_H 193