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#ifndef ELF64HEADER_H
#define ELF64HEADER_H
#include "datatypes.h"
#define EI_NIDENT 16
// ELF header
typedef struct {
unsigned char e_ident[EI_NIDENT];
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;
} Elf64_Ehdr;
// Section header
typedef struct {
Elf64_Word sh_name;
Elf64_Word sh_type;
Elf64_Xword sh_flags;
Elf64_Addr sh_addr;
Elf64_Off sh_offset;
Elf64_Xword sh_size;
Elf64_Word sh_link;
Elf64_Word sh_info;
Elf64_Xword sh_addralign;
Elf64_Xword sh_entsize;
} Elf64_Shdr;
// indentification struct
enum Elf_Ident {
EI_MAG0 = 0, // 0x7F
EI_MAG1 = 1, // 'E'
EI_MAG2 = 2, // 'L'
EI_MAG3 = 3, // 'F'
EI_CLASS = 4, // Architecture (32/64)
EI_DATA = 5, // Byte Order
EI_VERSION = 6, // ELF Version
EI_OSABI = 7, // OS Specific
EI_ABIVERSION = 8, // OS Specific
EI_PAD = 9 // Padding
};
// MAgic Numbers
#define ELFMAG0 0x7F
#define ELFMAG1 'E'
#define ELFMAG2 'L'
#define ELFMAG3 'F'
#define ELFCLASS64 2
enum Elf_Type {
ET_NONE = 0, // Unkown Type
ET_REL = 1, // Relocatable File
ET_EXEC = 2 // Executable File
};
// Machine
#define EM_X86_64 62
// version
#define EV_CURRENT 1
// Section header specific values
# define SHN_UNDEF (0x00) // Undefined/Not present
enum ShT_Types {
SHT_NULL = 0,
SHT_PROGBITS = 1,
SHT_SYMTAB = 2,
SHT_STRTAB = 3,
SHT_RELA = 4,
SHT_NOBITS = 8,
SHT_REL = 9,
};
enum ShT_Attributes {
SHF_WRITE = 0x01,
SHF_ALLOC = 0x02
};
#endif // ELF64HEADER_H
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