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//===-- elf.h ---------------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef __elf_h__
#define __elf_h__
typedef uint16_t Elf32_Half;
typedef uint32_t Elf32_Word;
typedef int32_t Elf32_Sword;
typedef uint32_t Elf32_Addr;
typedef uint32_t Elf32_Off;
#define EI_NIDENT 16
//----------------------------------------------------------------------
// ELF Header
//----------------------------------------------------------------------
typedef struct Elf32_Ehdr_Tag
{
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_Ehdr;
//----------------------------------------------------------------------
// e_type
//
// This member identifies the object file 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 0xff00 // Processor-specific
#define ET_HIPROC 0xffff // Processor-specific
//----------------------------------------------------------------------
// e_machine
//
// Machine Type
//----------------------------------------------------------------------
#define EM_NONE 0 // No machine
#define EM_M32 1 // AT&T WE 32100
#define EM_SPARC 2 // SPARC
#define EM_386 3 // Intel 80386
#define EM_68K 4 // Motorola 68000
#define EM_88K 5 // Motorola 88000
#define EM_860 7 // Intel 80860
#define EM_MIPS 8 // MIPS RS3000
#define EM_PPC 20 // PowerPC
#define EM_PPC64 21 // PowerPC64
#define EM_ARM 40 // ARM
//----------------------------------------------------------------------
// e_ident indexes
//----------------------------------------------------------------------
#define EI_MAG0 0 // File identification
#define EI_MAG1 1 // File identification
#define EI_MAG2 2 // File identification
#define EI_MAG3 3 // File identification
#define EI_CLASS 4 // File class
#define EI_DATA 5 // Data encoding
#define EI_VERSION 6 // File version
#define EI_PAD 7 // Start of padding bytes
//----------------------------------------------------------------------
// EI_DATA definitions
//----------------------------------------------------------------------
#define ELFDATANONE 0 // Invalid data encoding
#define ELFDATA2LSB 1 // Little Endian
#define ELFDATA2MSB 2 // Big Endian
//----------------------------------------------------------------------
// Section Header
//----------------------------------------------------------------------
typedef struct Elf32_Shdr_Tag
{
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;
//----------------------------------------------------------------------
// Section Types (sh_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_LOPROC 0x70000000
#define SHT_HIPROC 0x7fffffff
#define SHT_LOUSER 0x80000000
#define SHT_HIUSER 0xffffffff
//----------------------------------------------------------------------
// Special Section Indexes
//----------------------------------------------------------------------
#define SHN_UNDEF 0
#define SHN_LORESERVE 0xff00
#define SHN_LOPROC 0xff00
#define SHN_HIPROC 0xff1f
#define SHN_ABS 0xfff1
#define SHN_COMMON 0xfff2
#define SHN_HIRESERVE 0xffff
//----------------------------------------------------------------------
// Section Attribute Flags (sh_flags)
//----------------------------------------------------------------------
#define SHF_WRITE 0x1
#define SHF_ALLOC 0x2
#define SHF_EXECINSTR 0x4
#define SHF_MASKPROC 0xf0000000
//----------------------------------------------------------------------
// Symbol Table Entry Header
//----------------------------------------------------------------------
typedef struct Elf32_Sym_Tag
{
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;
#define ELF32_ST_BIND(i) ((i)>>4)
#define ELF32_ST_TYPE(i) ((i)&0xf)
#define ELF32_ST_INFO(b,t) (((b)<<4)+((t)&0xf))
// ST_BIND
#define STB_LOCAL 0
#define STB_GLOBAL 1
#define STB_WEAK 2
#define STB_LOPROC 13
#define STB_HIPROC 15
// ST_TYPE
#define STT_NOTYPE 0
#define STT_OBJECT 1
#define STT_FUNC 2
#define STT_SECTION 3
#define STT_FILE 4
#define STT_LOPROC 13
#define STT_HIPROC 15
//----------------------------------------------------------------------
// Relocation Entries
//----------------------------------------------------------------------
typedef struct Elf32_Rel_Tag
{
Elf32_Addr r_offset;
Elf32_Word r_info;
} Elf32_Rel;
typedef struct Elf32_Rela_Tag
{
Elf32_Addr r_offset;
Elf32_Word r_info;
Elf32_Sword r_addend;
} Elf32_Rela;
#define ELF32_R_SYM(i) ((i)>>8)
#define ELF32_R_TYPE(i) ((unsignedchar)(i))
#define ELF32_R_INFO(s,t) (((s)<<8)+(unsignedchar)(t))
//----------------------------------------------------------------------
// Program Headers
//----------------------------------------------------------------------
typedef struct Elf32_Phdr_Tag
{
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;
//----------------------------------------------------------------------
// Program Header Type (p_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_LOPROC 0x70000000
#define PT_HIPROC 0x7fffffff
#define PF_X (1 << 0) // executable
#define PF_W (1 << 1) // writable
#define PF_R (1 << 2) // readable
#endif // __elf_h__
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