elf.h File Reference

Data structures and constants defined in the ELF specification. More...

#include <stdint.h>

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Data Structures
struct	elf32_ehdr
	ELF Header(32-bit) More...
struct	elf64_ehdr
	ELF Header(64-bit) More...
struct	elf32_shdr
	Section Header(32-bit) More...
struct	elf64_shdr
	Section Header(64-bit) More...
struct	elf32_sym
	Symbol table entry(32-bit) More...
struct	elf64_sym
	Symbol table entry(64-bit) More...
struct	elf32_rel
	Relocation entry for 32-bit ELFs. More...
struct	elf32_rela
	Relocation entry for 32-bit ELFs with addend. More...
struct	elf64_rel
	Relocation entry for 64-bit ELFs. More...
struct	elf64_rela
	Relocation entry for 64-bit ELFs with addend. More...

Macros
#define	EI_NIDENT   16
	ELF identifier block.
#define	ET_REL   1
	Relocatable (unlinked) ELF.
#define	ET_EXEC   2
	Executable (without PIC/PIE) ELF.
#define	ET_DYN   3
	Dynamic (executable with PIC/PIE or shared lib) ELF.
#define	ET_CORE   4
	Core Dump.
#define	SHT_NULL   0x0
	ELF section types.
#define	SHT_PROGBITS   0x1
	Program data.
#define	SHT_SYMTAB   0x2
	Symbol table.
#define	SHT_STRTAB   0x3
	String table.
#define	SHT_RELA   0x4
	Relocation entries with addends.
#define	SHT_NOBITS   0x8
	Program data with no file image.
#define	SHT_REL   0x9
	Relocation entries without addends.
#define	SHT_DYNSYM   0xB
	Dynamic linking symbol table.
#define	SHF_WRITE   0x1
	ELF section flags.
#define	SHF_ALLOC   0x2
	Section is present in memory.
#define	SHF_EXECINSTR   0x4
	Section contains executable instructions.
#define	SHN_UNDEF   0
	ELF section numbers.
#define	SHN_LORESERVE   0xff00
	Start of reserved section numbers.
#define	SHN_ABS   0xfff1
	Special value for absolute symbols.
#define	SHN_COMMON   0xfff2
	Common block.
#define	SHN_HIRESERVE   0xffff
	End of reserved section numbers.
#define	STT_NOTYPE   0
	Symbol table entry types.
#define	STT_OBJECT   1
	Data or object.
#define	STT_FUNC   2
	Function.
#define	STT_SECTION   3
	Section.
#define	STT_FILE   4
	File name.
#define	STT_COMMON   5
	Common block.
#define	STT_LOOS   10
	Start of OS specific.
#define	STT_HIOS   12
	End of OS specific.
#define	STT_LOPROC   13
	Start of processor specific.
#define	STT_HIPROC   15
	End of processor specific.
#define	STB_LOCAL   0
	Symbol table entry bindings.
#define	STB_GLOBAL   1
	Global symbol.
#define	STB_WEAK   2
	Weak symbol.
#define	STB_LOOS   10
	Start of OS specific.
#define	STB_HIOS   12
	End of OS specific.
#define	STB_LOPROC   13
	Start of processor specific.
#define	STB_HIPROC   15
	End of processor specific.
#define	ELF32_ST_BIND(i)   ((i) >> 4)
	Symbol binding from 32bit st_info.
#define	ELF32_ST_TYPE(i)   ((i) & 0xf)
	Symbol type from 32bit st_info.
#define	ELF64_ST_BIND(i)   ((i) >> 4)
	Symbol binding from 32bit st_info.
#define	ELF64_ST_TYPE(i)   ((i) & 0xf)
	Symbol type from 32bit st_info.
#define	ELF32_R_SYM(i)   ((i) >> 8)
	Relocation symbol index from r_info.
#define	ELF32_R_TYPE(i)   ((i) & 0xff)
	Relocation type from r_info.
#define	ELF64_R_SYM(i)   ((i) >> 32)
	Relocation symbol from r_info.
#define	ELF64_R_TYPE(i)   ((i) & 0xffffffff)
	Relocation type from r_info.
#define	ELF_R_SYM   ELF64_R_SYM
	Machine sized macro alias for obtaining a relocation symbol.
#define	ELF_R_TYPE   ELF64_R_TYPE
	Machine sized macro alias for obtaining a relocation type.
#define	ELF_ST_BIND   ELF64_ST_BIND
	Machine sized macro alias for obtaining a symbol bind.
#define	ELF_ST_TYPE   ELF64_ST_TYPE
	Machine sized macro alias for obtaining a symbol type.

Typedefs
typedef uint32_t	elf32_addr
	Unsigned program address.
typedef uint16_t	elf32_half
	Unsigned medium integer.
typedef uint32_t	elf32_off
	Unsigned file offset.
typedef int32_t	elf32_sword
	Signed integer.
typedef uint32_t	elf32_word
	Unsigned integer.
typedef uint64_t	elf64_addr
	Unsigned program address.
typedef uint16_t	elf64_half
	Unsigned medium integer.
typedef uint64_t	elf64_off
	Unsigned file offset.
typedef int32_t	elf64_sword
	Signed integer.
typedef uint32_t	elf64_word
	Unsigned integer.
typedef int64_t	elf64_sxword
	Signed long integer.
typedef uint64_t	elf64_xword
	Unsigned long integer.
typedef struct elf64_ehdr	elf_ehdr_t
	Relocation names (should be moved to arch-specific files)
typedef struct elf64_shdr	elf_shdr_t
	Machine sized section header structure.
typedef struct elf64_phdr	elf_phdr_t
	Machine sized program header structure.
typedef elf64_addr	elf_addr
	Machine sized program address.
typedef elf64_half	elf_half
	Machine sized small integer.
typedef elf64_xword	elf_word
	Machine sized integer.
typedef struct elf64_rel	elf_rel_t
	Machine sized relocation struct.
typedef struct elf64_rela	elf_rela_t
	Machine sized relocation struct with addend.
typedef struct elf64_sym	elf_sym_t
	Machine sized symbol struct.

Detailed Description

Data structures and constants defined in the ELF specification.

Reference documents can be found here: https://refspecs.linuxfoundation.org/elf/