toaruos/base/usr/include/elf.h

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2018-02-25 08:13:54 +03:00
/* vim: tabstop=4 shiftwidth=4 noexpandtab
*
* ELF Binary Executable headers
*
*/
#pragma once
/*
* Different bits of our build environment
* require different header files for definitions
*/
#ifdef _KERNEL_
# include <types.h>
#else
# include <stdint.h>
#endif
/*
* Unless otherwise stated, the definitions herein
* are sourced from the Portable Formats Specification,
* version 1.1 - ELF: Executable and Linkable Format
*/
/*
* ELF Magic Signature
*/
#define ELFMAG0 0x7f
#define ELFMAG1 'E'
#define ELFMAG2 'L'
#define ELFMAG3 'F'
#define EI_NIDENT 16
/*
* ELF Datatypes
*/
typedef uint32_t Elf32_Word;
typedef uint32_t Elf32_Addr;
typedef uint32_t Elf32_Off;
typedef uint32_t Elf32_Sword;
typedef uint16_t Elf32_Half;
/*
* ELF Header
*/
typedef struct {
unsigned char e_ident[EI_NIDENT];
Elf32_Half e_type;
Elf32_Half e_machine;
Elf32_Word e_version;
Elf32_Addr e_entry;
Elf32_Off e_phoff;
Elf32_Off e_shoff;
Elf32_Word e_flags;
Elf32_Half e_ehsize;
Elf32_Half e_phentsize;
Elf32_Half e_phnum;
Elf32_Half e_shentsize;
Elf32_Half e_shnum;
Elf32_Half e_shstrndx;
} Elf32_Header;
/*
* e_type
*/
#define ET_NONE 0 /* No file type */
#define ET_REL 1 /* Relocatable file */
#define ET_EXEC 2 /* Executable file */
#define ET_DYN 3 /* Shared object file */
#define ET_CORE 4 /* Core file */
#define ET_LOPROC 0xff0 /* [Processor Specific] */
#define ET_HIPROC 0xfff /* [Processor Specific] */
/*
* Machine types
*/
#define EM_NONE 0
#define EM_386 3
#define EV_NONE 0
#define EV_CURRENT 1
/** Program Header */
typedef struct {
Elf32_Word p_type;
Elf32_Off p_offset;
Elf32_Addr p_vaddr;
Elf32_Addr p_paddr;
Elf32_Word p_filesz;
Elf32_Word p_memsz;
Elf32_Word p_flags;
Elf32_Word p_align;
} Elf32_Phdr;
/* p_type values */
#define PT_NULL 0 /* Unused, skip me */
#define PT_LOAD 1 /* Loadable segment */
#define PT_DYNAMIC 2 /* Dynamic linking information */
#define PT_INTERP 3 /* Interpreter (null-terminated string, pathname) */
#define PT_NOTE 4 /* Auxillary information */
#define PT_SHLIB 5 /* Reserved. */
#define PT_PHDR 6 /* Oh, it's me. Hello! Back-reference to the header table itself */
#define PT_LOPROC 0x70000000
#define PT_HIPROC 0x7FFFFFFF
/** Section Header */
typedef struct {
Elf32_Word sh_name;
Elf32_Word sh_type;
Elf32_Word sh_flags;
Elf32_Addr sh_addr;
Elf32_Off sh_offset;
Elf32_Word sh_size;
Elf32_Word sh_link;
Elf32_Word sh_info;
Elf32_Word sh_addralign;
Elf32_Word sh_entsize;
} Elf32_Shdr;
typedef struct {
uint32_t id;
uintptr_t ptr;
} Elf32_auxv;
typedef struct {
Elf32_Word st_name;
Elf32_Addr st_value;
Elf32_Word st_size;
unsigned char st_info;
unsigned char st_other;
Elf32_Half st_shndx;
} Elf32_Sym;
typedef struct {
Elf32_Addr r_offset;
Elf32_Word r_info;
} Elf32_Rel;
typedef struct {
Elf32_Sword d_tag;
union {
Elf32_Word d_val;
Elf32_Addr d_ptr;
Elf32_Off d_off;
} d_un;
} Elf32_Dyn;
/* sh_type values */
#define SHT_NONE 0
#define SHT_PROGBITS 1
#define SHT_SYMTAB 2
#define SHT_STRTAB 3
#define SHT_NOBITS 8
#define SHT_REL 9
#define ELF32_R_SYM(i) ((i) >> 8)
#define ELF32_R_TYPE(i) ((unsigned char)(i))
#define ELF32_R_INFO(s,t) (((s) << 8) + (unsigned char)(t))
#define ELF32_ST_BIND(i) ((i) >> 4)
#define ELF32_ST_TYPE(i) ((i) & 0xf)
#define ELF32_ST_INFO(b,t) (((b) << 4) + ((t) & 0xf))
#define STB_LOCAL 0
#define STB_GLOBAL 1
#define STB_WEAK 2
#define STB_NUM 3
#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 STT_FILE 4
#define STT_COMMON 5
#define STT_TLS 6
#define STT_NUM 7
#define STT_LOPROC 13
#define STT_HIPROC 15