#include <bits/types.h>

/* elfhdr.tag */

#define ELFTAG "\x7F" "ELF"

/* elfhdr.class */

#define ELF_32 1

#define ELF_64 2

/* elfhdr.data */

#define ELF_LSB 1

#define ELF_MSB 2

/* elfhdr.osabi */

#define ELF_ABI_SYSV 0

#define ELF_ABI_HPUX 1

#define ELF_ABI_NETBSD 2

#define ELF_ABI_GNU 3

#define ELF_ABI_SOLARIS 6

#define ELF_ABI_AIX 7

#define ELF_ABI_IRIX 8

#define ELF_ABI_FREEBSD 9

#define ELF_ABI_TRU64 10

#define ELF_ABI_MODESTO 11

#define ELF_ABI_OPENBSD 12

#define ELF_ABI_ARM_AEABI 64

#define ELF_ABI_ARM 97

#define ELF_ABI_STANDALONE 255

/* elf?hdr.type */

#define ET_NONE 0

#define ET_REL 1

#define ET_EXEC 2

#define ET_DYN 3

#define ET_CORE 4

struct elfhdr {

byte tag[4];

byte class;

byte data;

byte version;

byte osabi;

byte abiversion;

byte _pad[7];

} __attribute__((packed));

/* elf*hdr.phnum */

#define PN_XNUM 0xffff

struct elf32hdr {

struct elfhdr ident;

uint16_t type;

uint16_t machine;

uint32_t version;

uint32_t entry;

uint32_t phoff;

uint32_t shoff;

uint32_t flags;

uint16_t ehsize;

uint16_t phentsize;

uint16_t phnum;

uint16_t shentsize;

uint16_t shnum;

uint16_t shstrndx;

} __attribute__((packed));

struct elf64hdr {

struct elfhdr ident;

uint16_t type;

uint16_t machine;

uint32_t version;

uint64_t entry;

uint64_t phoff;

uint64_t shoff;

uint32_t flags;

uint16_t ehsize;

uint16_t phentsize;

uint16_t phnum;

uint16_t shentsize;

uint16_t shnum;

uint16_t shstrndx;

} __attribute__((packed));

/* elf?shdr.name */

#define SHN_UNDEF 0x0000

#define SHN_ABS 0xfff1

#define SHN_COMMON 0xfff2

#define SHN_XINDEX 0xffff

/* elf?shdr.type */

#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_INIT_ARRAY 14

#define SHT_FINI_ARRAY 15

#define SHT_PREINIT_ARRAY 16

#define SHT_GROUP 17

#define SHT_SYMTAB_SHNDX 18

#define SHT_NUM 19

/* elf?shdr.type platform extensions */

#define SHT_GNU_ATTRIBUTES 0x6ffffff5

#define SHT_GNU_HASH 0x6ffffff6

#define SHT_GNU_LIBLIST 0x6ffffff7

#define SHT_CHECKSUM 0x6ffffff8

#define SHT_GNU_verdef 0x6ffffffd

#define SHT_GNU_verneed 0x6ffffffe

#define SHT_GNU_versym 0x6fffffff

/* elf*shdr.flags */

#define SHF_WRITE (1<<0)

#define SHF_ALLOC (1<<1)

#define SHF_EXECINSTR (1<<2)

#define SHF_MERGE (1<<4)

#define SHF_STRINGS (1<<5)

#define SHF_INFO_LINK (1<<6)

#define SHF_LINK_ORDER (1<<7)

#define SHF_OS_NONSTD (1<<8)

#define SHF_GROUP (1<<9)

#define SHF_TLS (1<<10)

#define SHF_COMPRESSED (1<<11)

struct elf32shdr {

uint32_t name;

uint32_t type;

uint32_t flags;

uint32_t addr;

uint32_t offset;

uint32_t size;

uint32_t link;

uint32_t info;

uint32_t align;

uint32_t entsize;

} __attribute__((packed));

struct elf64shdr {

uint32_t name;

uint32_t type;

uint64_t flags;

uint64_t addr;

uint64_t offset;

uint64_t size;

uint32_t link;

uint32_t info;

uint64_t align;

uint64_t entsize;

} __attribute__((packed));

/* elf?phdr.type */

#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_TLS 7

#define PT_NUM 8

/* elf?phdr.type platform extensions */

#define PT_GNU_EH_FRAME 0x6474e550

#define PT_GNU_STACK 0x6474e551

#define PT_GNU_RELRO 0x6474e552

/* elf*phdr.flags */

#define PF_X (1 << 0)

#define PF_W (1 << 1)

#define PF_R (1 << 2)

struct elf32phdr {

uint32_t type;

uint32_t offset;

uint32_t vaddr;

uint32_t paddr;

uint32_t filesz;

uint32_t memsz;

uint32_t flags;

uint32_t align;

} __attribute__((packed));

struct elf64phdr {

uint32_t type;

uint32_t flags;

uint64_t offset;

uint64_t vaddr;

uint64_t paddr;

uint64_t filesz;

uint64_t memsz;

uint64_t align;

} __attribute__((packed));

/* elf*dyn.tag */

#define DT_NULL 0

#define DT_NEEDED 1

#define DT_PLTRELSZ 2

#define DT_PLTGOT 3

#define DT_HASH 4

#define DT_STRTAB 5

#define DT_SYMTAB 6

#define DT_RELA 7

#define DT_RELASZ 8

#define DT_RELAENT 9

#define DT_STRSZ 10

#define DT_SYMENT 11

#define DT_INIT 12

#define DT_FINI 13

#define DT_SONAME 14

#define DT_RPATH 15

#define DT_SYMBOLIC 16

#define DT_REL 17

#define DT_RELSZ 18

#define DT_RELENT 19

#define DT_PLTREL 20

#define DT_DEBUG 21

#define DT_TEXTREL 22

#define DT_JMPREL 23

#define DT_BIND_NOW 24

#define DT_INIT_ARRAY 25

#define DT_FINI_ARRAY 26

#define DT_INIT_ARRAYSZ 27

#define DT_FINI_ARRAYSZ 28

#define DT_RUNPATH 29

#define DT_FLAGS 30

#define DT_ENCODING 32

struct elf32dyn {

uint32_t tag;

uint32_t val;

} __attribute__((packed));

struct elf64dyn {

uint64_t tag;

uint64_t val;

} __attribute__((packed));

#define ELF_SYM_BIND(val) ((val >> 4) & 0x0F)

#define ELF_SYM_TYPE(val) ((val >> 0) & 0x0F)

/* elf*sym.info:bind */

#define STB_LOCAL 0

#define STB_GLOBAL 1

#define STB_WEAK 2

#define STB_NUM 3

/* elf*sym.info:type */

#define STT_NOTYPE 0

#define STT_OBJECT 1

#define STT_FUNC 2

#define STT_SECTION 3

#define STT_FILE 4

#define STT_COMMON 5

#define STT_TLS 6

#define STT_NUM 7

#define STT_LOOS 10

#define STT_GNU_IFUNC 10

#define STT_HIOS 12

#define STT_LOPROC 13

#define STT_HIPROC 15

struct elf32sym {

uint32_t name;

uint32_t value;

uint32_t size;

byte info;

byte other;

uint16_t shndx;

} __attribute__((packed));

struct elf64sym {

uint32_t name;

byte info;

byte other;

uint16_t shndx;

uint64_t value;

uint64_t size;

} __attribute__((packed));