ELF constants and data types

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	SHT_INIT_ARRAY   0xe
	Array of pointers to init functions.
#define	SHT_FINI_ARRAY   0xf
	Array of pointers to termination functions.
#define	SHT_PREINIT_ARRAY   0x10
	Array of pointers to early init functions.
#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	SHF_BASIC_TYPE_MASK   (SHF_WRITE | SHF_ALLOC | SHF_EXECINSTR)
#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)
	Symbol binding from 32bit st_info.
#define	ELF32_ST_TYPE(i)
	Symbol type from 32bit st_info.
#define	ELF64_ST_BIND(i)
	Symbol binding from 32bit st_info.
#define	ELF64_ST_TYPE(i)
	Symbol type from 32bit st_info.
#define	ELF32_R_SYM(i)
	Relocation symbol index from r_info.
#define	ELF32_R_TYPE(i)
	Relocation type from r_info.
#define	ELF64_R_SYM(i)
	Relocation symbol from r_info.
#define	ELF64_R_TYPE(i)
	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

Macro Definition Documentation

EI_NIDENT

#define EI_NIDENT   16

#include <zephyr/llext/elf.h>

ELF identifier block.

4 byte magic (.ELF) 1 byte class (Invalid, 32 bit, 64 bit) 1 byte endianness (Invalid, LSB, MSB) 1 byte version (1) 1 byte OS ABI (0 None, 1 HP-UX, 2 NetBSD, 3 Linux) 1 byte ABI (0) 7 bytes padding

ELF32_R_SYM

#define ELF32_R_SYM

(

i

)

#include <zephyr/llext/elf.h>

Value:

((i) >> 8)

Relocation symbol index from r_info.

Parameters

i	Value of r_info

ELF32_R_TYPE

#define ELF32_R_TYPE

(

i

)

#include <zephyr/llext/elf.h>

Value:

((i) & 0xff)

Relocation type from r_info.

Parameters

i	Value of r_info

ELF32_ST_BIND

#define ELF32_ST_BIND

(

i

)

#include <zephyr/llext/elf.h>

Value:

((i) >> 4)

Symbol binding from 32bit st_info.

Parameters

i	Value of st_info

ELF32_ST_TYPE

#define ELF32_ST_TYPE

(

i

)

#include <zephyr/llext/elf.h>

Value:

((i) & 0xf)

Symbol type from 32bit st_info.

Parameters

i	Value of st_info

ELF64_R_SYM

#define ELF64_R_SYM

(

i

)

#include <zephyr/llext/elf.h>

Value:

((i) >> 32)

Relocation symbol from r_info.

Parameters

i	Value of r_info

ELF64_R_TYPE

#define ELF64_R_TYPE

(

i

)

#include <zephyr/llext/elf.h>

Value:

((i) & 0xffffffff)

Relocation type from r_info.

Parameters

i	Value of r_info

ELF64_ST_BIND

#define ELF64_ST_BIND

(

i

)

#include <zephyr/llext/elf.h>

Value:

((i) >> 4)

Symbol binding from 32bit st_info.

Parameters

i	Value of st_info

ELF64_ST_TYPE

#define ELF64_ST_TYPE

(

i

)

#include <zephyr/llext/elf.h>

Value:

((i) & 0xf)

Symbol type from 32bit st_info.

Parameters

i	Value of st_info

ELF_R_SYM

#define ELF_R_SYM   ELF64_R_SYM

#include <zephyr/llext/elf.h>

Machine sized macro alias for obtaining a relocation symbol.

ELF_R_TYPE

#define ELF_R_TYPE   ELF64_R_TYPE

#include <zephyr/llext/elf.h>

Machine sized macro alias for obtaining a relocation type.

ELF_ST_BIND

#define ELF_ST_BIND   ELF64_ST_BIND

#include <zephyr/llext/elf.h>

Machine sized macro alias for obtaining a symbol bind.

ELF_ST_TYPE

#define ELF_ST_TYPE   ELF64_ST_TYPE

#include <zephyr/llext/elf.h>

Machine sized macro alias for obtaining a symbol type.

ET_CORE

#define ET_CORE   4

#include <zephyr/llext/elf.h>

Core Dump.

ET_DYN

#define ET_DYN   3

#include <zephyr/llext/elf.h>

Dynamic (executable with PIC/PIE or shared lib) ELF.

ET_EXEC

#define ET_EXEC   2

#include <zephyr/llext/elf.h>

Executable (without PIC/PIE) ELF.

ET_REL

#define ET_REL   1

#include <zephyr/llext/elf.h>

Relocatable (unlinked) ELF.

SHF_ALLOC

#define SHF_ALLOC   0x2

#include <zephyr/llext/elf.h>

Section is present in memory.

SHF_BASIC_TYPE_MASK

#define SHF_BASIC_TYPE_MASK   (SHF_WRITE | SHF_ALLOC | SHF_EXECINSTR)

#include <zephyr/llext/elf.h>

SHF_EXECINSTR

#define SHF_EXECINSTR   0x4

#include <zephyr/llext/elf.h>

Section contains executable instructions.

SHF_WRITE

#define SHF_WRITE   0x1

#include <zephyr/llext/elf.h>

ELF section flags.

Section is writable

SHN_ABS

#define SHN_ABS   0xfff1

#include <zephyr/llext/elf.h>

Special value for absolute symbols.

SHN_COMMON

#define SHN_COMMON   0xfff2

#include <zephyr/llext/elf.h>

Common block.

SHN_HIRESERVE

#define SHN_HIRESERVE   0xffff

#include <zephyr/llext/elf.h>

End of reserved section numbers.

SHN_LORESERVE

#define SHN_LORESERVE   0xff00

#include <zephyr/llext/elf.h>

Start of reserved section numbers.

SHN_UNDEF

#define SHN_UNDEF   0

#include <zephyr/llext/elf.h>

ELF section numbers.

Undefined section

SHT_DYNSYM

#define SHT_DYNSYM   0xB

#include <zephyr/llext/elf.h>

Dynamic linking symbol table.

SHT_FINI_ARRAY

#define SHT_FINI_ARRAY   0xf

#include <zephyr/llext/elf.h>

Array of pointers to termination functions.

SHT_INIT_ARRAY

#define SHT_INIT_ARRAY   0xe

#include <zephyr/llext/elf.h>

Array of pointers to init functions.

SHT_NOBITS

#define SHT_NOBITS   0x8

#include <zephyr/llext/elf.h>

Program data with no file image.

SHT_NULL

#define SHT_NULL   0x0

#include <zephyr/llext/elf.h>

ELF section types.

Unused section

SHT_PREINIT_ARRAY

#define SHT_PREINIT_ARRAY   0x10

#include <zephyr/llext/elf.h>

Array of pointers to early init functions.

SHT_PROGBITS

#define SHT_PROGBITS   0x1

#include <zephyr/llext/elf.h>

Program data.

SHT_REL

#define SHT_REL   0x9

#include <zephyr/llext/elf.h>

Relocation entries without addends.

SHT_RELA

#define SHT_RELA   0x4

#include <zephyr/llext/elf.h>

Relocation entries with addends.

SHT_STRTAB

#define SHT_STRTAB   0x3

#include <zephyr/llext/elf.h>

String table.

SHT_SYMTAB

#define SHT_SYMTAB   0x2

#include <zephyr/llext/elf.h>

Symbol table.

STB_GLOBAL

#define STB_GLOBAL   1

#include <zephyr/llext/elf.h>

Global symbol.

STB_HIOS

#define STB_HIOS   12

#include <zephyr/llext/elf.h>

End of OS specific.

STB_HIPROC

#define STB_HIPROC   15

#include <zephyr/llext/elf.h>

End of processor specific.

STB_LOCAL

#define STB_LOCAL   0

#include <zephyr/llext/elf.h>

Symbol table entry bindings.

Local symbol

STB_LOOS

#define STB_LOOS   10

#include <zephyr/llext/elf.h>

Start of OS specific.

STB_LOPROC

#define STB_LOPROC   13

#include <zephyr/llext/elf.h>

Start of processor specific.

STB_WEAK

#define STB_WEAK   2

#include <zephyr/llext/elf.h>

Weak symbol.

STT_COMMON

#define STT_COMMON   5

#include <zephyr/llext/elf.h>

Common block.

STT_FILE

#define STT_FILE   4

#include <zephyr/llext/elf.h>

File name.

STT_FUNC

#define STT_FUNC   2

#include <zephyr/llext/elf.h>

Function.

STT_HIOS

#define STT_HIOS   12

#include <zephyr/llext/elf.h>

End of OS specific.

STT_HIPROC

#define STT_HIPROC   15

#include <zephyr/llext/elf.h>

End of processor specific.

STT_LOOS

#define STT_LOOS   10

#include <zephyr/llext/elf.h>

Start of OS specific.

STT_LOPROC

#define STT_LOPROC   13

#include <zephyr/llext/elf.h>

Start of processor specific.

STT_NOTYPE

#define STT_NOTYPE   0

#include <zephyr/llext/elf.h>

Symbol table entry types.

No type

STT_OBJECT

#define STT_OBJECT   1

#include <zephyr/llext/elf.h>

Data or object.

STT_SECTION

#define STT_SECTION   3

#include <zephyr/llext/elf.h>

Section.

Typedef Documentation

elf32_addr

typedef uint32_t elf32_addr

#include <zephyr/llext/elf.h>

Unsigned program address.

elf32_half

typedef uint16_t elf32_half

#include <zephyr/llext/elf.h>

Unsigned medium integer.

elf32_off

typedef uint32_t elf32_off

#include <zephyr/llext/elf.h>

Unsigned file offset.

elf32_sword

typedef int32_t elf32_sword

#include <zephyr/llext/elf.h>

Signed integer.

elf32_word

typedef uint32_t elf32_word

#include <zephyr/llext/elf.h>

Unsigned integer.

elf64_addr

typedef uint64_t elf64_addr

#include <zephyr/llext/elf.h>

Unsigned program address.

elf64_half

typedef uint16_t elf64_half

#include <zephyr/llext/elf.h>

Unsigned medium integer.

elf64_off

typedef uint64_t elf64_off

#include <zephyr/llext/elf.h>

Unsigned file offset.

elf64_sword

typedef int32_t elf64_sword

#include <zephyr/llext/elf.h>

Signed integer.

elf64_sxword

typedef int64_t elf64_sxword

#include <zephyr/llext/elf.h>

Signed long integer.

elf64_word

typedef uint32_t elf64_word

#include <zephyr/llext/elf.h>

Unsigned integer.

elf64_xword

typedef uint64_t elf64_xword

#include <zephyr/llext/elf.h>

Unsigned long integer.

elf_addr

typedef elf64_addr elf_addr

#include <zephyr/llext/elf.h>

Machine sized program address.

elf_ehdr_t

typedef struct elf64_ehdr elf_ehdr_t

#include <zephyr/llext/elf.h>

Relocation names (should be moved to arch-specific files)

Dynamic features currently not used by LLEXT Machine sized elf header structure

elf_half

typedef elf64_half elf_half

#include <zephyr/llext/elf.h>

Machine sized small integer.

elf_phdr_t

typedef struct elf64_phdr elf_phdr_t

#include <zephyr/llext/elf.h>

Machine sized program header structure.

elf_rel_t

typedef struct elf64_rel elf_rel_t

#include <zephyr/llext/elf.h>

Machine sized relocation struct.

elf_rela_t

typedef struct elf64_rela elf_rela_t

#include <zephyr/llext/elf.h>

Machine sized relocation struct with addend.

elf_shdr_t

typedef struct elf64_shdr elf_shdr_t

#include <zephyr/llext/elf.h>

Machine sized section header structure.

elf_sym_t

typedef struct elf64_sym elf_sym_t

#include <zephyr/llext/elf.h>

Machine sized symbol struct.

elf_word

typedef elf64_xword elf_word

#include <zephyr/llext/elf.h>

Machine sized integer.