elf.h

#pragma once

#include <stdint.h>

typedef uint64_t elf64_addr;
typedef uint64_t elf64_off;
typedef uint16_t elf64_half;
typedef uint32_t elf64_word;
typedef int32_t elf64_sword;
typedef uint64_t elf64_xword;
typedef int64_t elf64_sxword;

enum ehdr_id_fields
{
    ei_mag0 = 0,
    ei_mag1 = 1,
    ei_mag2 = 2,
    ei_mag3 = 3,
    ei_class = 4,
    ei_data = 5,
    ei_version = 6,
    ei_osabi = 7,
    ei_abiversion = 8,
    ei_pad = 9,
    ei_nident = 16,
};

#define ELFCLASS64 2
#define ELFDATA2LSB 1
#define EV_CURRENT 1

#define ELFOSABI_SYSV 0
#define ELFOSABI_HPUX 1
#define ELFOSABI_STANDALONE 255

#define ET_NONE 0
#define ET_REL 1
#define ET_EXEC 2
#define ET_DYN 3
#define ET_CORE 4
#define ET_LOOS 0xfe00
#define ET_HIOS 0xfeff
#define ET_LOPROC 0xff00
#define ET_HIPROC 0xffff

#define EM_X86_64 62

#define SHN_UNDEF 0

#define SHT_NULL 0
#define SHT_PROGBITS 1
#define SHT_SYMTAB 2
#define SHT_STRTAB 3
#define SHT_RELA 4
#define SHT_HASH 5
#define SHT_DYNAMIC 6
#define SHT_NOTE 7
#define SHT_NOBITS 8
#define SHT_REL 9
#define SHT_SHLIB 10
#define SHT_DYNSYM 11
#define SHT_LOOS 0x60000000
#define SHT_HIOS 0x6FFFFFFF
#define SHT_LOPROC 0x70000000
#define SHT_HIPROC 0x7FFFFFFF

#define SHF_WRITE 0x1
#define SHF_ALLOC 0x2
#define SHF_EXECINSTR 0x4
#define SHF_MASKOS 0x0F000000
#define SHF_MASKPROC 0xF0000000

#define STB_LOCAL 0
#define STB_GLOBAL 1
#define STB_WEAK 2
#define STB_LOOS 10
#define STB_HIOS 12
#define STB_LOPROC 13
#define STB_HIPROC 15

#define STT_NOTYPE 0
#define STT_OBJECT 1
#define STT_FUNC 2
#define STT_SECTION 3

#define PT_NULL 0
#define PT_LOAD 1
#define PT_DYNAMIC 2
#define PT_INTERP 3
#define PT_NOTE 4
#define PT_SHLIB 5
#define PT_PHDR 6
#define PT_LOOS 0x6000 0000
#define PT_HIOS 0x6FFF FFFF
#define PT_LOPROC 0x7000 0000
#define PT_HIPROC 0x7FFF FFFF

#define PF_X 0x1
#define PF_W 0x2
#define PF_R 0x4
#define PF_MASKOS 0x00FF 0000
#define PF_MASKPROC 0xFF00 0000

struct elf64_ehdr
{
    unsigned char e_ident[16];
    elf64_half e_type;
    elf64_half e_machine;
    elf64_word e_version;
    elf64_addr e_entry;
    elf64_off e_phoff;
    elf64_off e_shoff;
    elf64_word e_flags;
    elf64_half e_ehsize;
    elf64_half e_phentsize;
    elf64_half e_phnum;
    elf64_half e_shentsize;
    elf64_half e_shnum;
    elf64_half e_shstrndx;
};

struct elf64_phdr
{
    elf64_word p_type;
    elf64_word p_flags;
    elf64_off p_offset;
    elf64_addr p_vaddr;
    elf64_addr p_paddr;
    elf64_xword p_filesz;
    elf64_xword p_memsz;
    elf64_xword p_align;
};