241 lines
7.0 KiB
C++
241 lines
7.0 KiB
C++
//===-- elf.h ---------------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef __elf_h__
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#define __elf_h__
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typedef uint16_t Elf32_Half;
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typedef uint32_t Elf32_Word;
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typedef int32_t Elf32_Sword;
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typedef uint32_t Elf32_Addr;
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typedef uint32_t Elf32_Off;
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#define EI_NIDENT 16
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//----------------------------------------------------------------------
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// ELF Header
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//----------------------------------------------------------------------
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typedef struct Elf32_Ehdr_Tag
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{
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unsigned char e_ident[EI_NIDENT];
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Elf32_Half e_type;
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Elf32_Half e_machine;
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Elf32_Word e_version;
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Elf32_Addr e_entry;
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Elf32_Off e_phoff;
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Elf32_Off e_shoff;
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Elf32_Word e_flags;
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Elf32_Half e_ehsize;
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Elf32_Half e_phentsize;
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Elf32_Half e_phnum;
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Elf32_Half e_shentsize;
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Elf32_Half e_shnum;
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Elf32_Half e_shstrndx;
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} Elf32_Ehdr;
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//----------------------------------------------------------------------
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// e_type
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//
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// This member identifies the object file type.
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//----------------------------------------------------------------------
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#define ET_NONE 0 // No file type
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#define ET_REL 1 // Relocatable file
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#define ET_EXEC 2 // Executable file
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#define ET_DYN 3 // Shared object file
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#define ET_CORE 4 // Core file
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#define ET_LOPROC 0xff00 // Processor-specific
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#define ET_HIPROC 0xffff // Processor-specific
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//----------------------------------------------------------------------
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// e_machine
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//
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// Machine Type
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//----------------------------------------------------------------------
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#define EM_NONE 0 // No machine
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#define EM_M32 1 // AT&T WE 32100
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#define EM_SPARC 2 // SPARC
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#define EM_386 3 // Intel 80386
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#define EM_68K 4 // Motorola 68000
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#define EM_88K 5 // Motorola 88000
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#define EM_860 7 // Intel 80860
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#define EM_MIPS 8 // MIPS RS3000
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#define EM_PPC 20 // PowerPC
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#define EM_PPC64 21 // PowerPC64
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#define EM_ARM 40 // ARM
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//----------------------------------------------------------------------
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// e_ident indexes
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//----------------------------------------------------------------------
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#define EI_MAG0 0 // File identification
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#define EI_MAG1 1 // File identification
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#define EI_MAG2 2 // File identification
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#define EI_MAG3 3 // File identification
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#define EI_CLASS 4 // File class
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#define EI_DATA 5 // Data encoding
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#define EI_VERSION 6 // File version
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#define EI_PAD 7 // Start of padding bytes
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//----------------------------------------------------------------------
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// EI_DATA definitions
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//----------------------------------------------------------------------
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#define ELFDATANONE 0 // Invalid data encoding
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#define ELFDATA2LSB 1 // Little Endian
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#define ELFDATA2MSB 2 // Big Endian
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//----------------------------------------------------------------------
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// Section Header
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//----------------------------------------------------------------------
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typedef struct Elf32_Shdr_Tag
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{
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Elf32_Word sh_name;
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Elf32_Word sh_type;
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Elf32_Word sh_flags;
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Elf32_Addr sh_addr;
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Elf32_Off sh_offset;
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Elf32_Word sh_size;
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Elf32_Word sh_link;
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Elf32_Word sh_info;
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Elf32_Word sh_addralign;
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Elf32_Word sh_entsize;
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} Elf32_Shdr;
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//----------------------------------------------------------------------
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// Section Types (sh_type)
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//----------------------------------------------------------------------
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#define SHT_NULL 0
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#define SHT_PROGBITS 1
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#define SHT_SYMTAB 2
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#define SHT_STRTAB 3
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#define SHT_RELA 4
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#define SHT_HASH 5
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#define SHT_DYNAMIC 6
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#define SHT_NOTE 7
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#define SHT_NOBITS 8
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#define SHT_REL 9
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#define SHT_SHLIB 10
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#define SHT_DYNSYM 11
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#define SHT_LOPROC 0x70000000
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#define SHT_HIPROC 0x7fffffff
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#define SHT_LOUSER 0x80000000
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#define SHT_HIUSER 0xffffffff
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//----------------------------------------------------------------------
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// Special Section Indexes
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//----------------------------------------------------------------------
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#define SHN_UNDEF 0
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#define SHN_LORESERVE 0xff00
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#define SHN_LOPROC 0xff00
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#define SHN_HIPROC 0xff1f
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#define SHN_ABS 0xfff1
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#define SHN_COMMON 0xfff2
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#define SHN_HIRESERVE 0xffff
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//----------------------------------------------------------------------
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// Section Attribute Flags (sh_flags)
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//----------------------------------------------------------------------
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#define SHF_WRITE 0x1
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#define SHF_ALLOC 0x2
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#define SHF_EXECINSTR 0x4
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#define SHF_MASKPROC 0xf0000000
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//----------------------------------------------------------------------
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// Symbol Table Entry Header
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//----------------------------------------------------------------------
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typedef struct Elf32_Sym_Tag
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{
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Elf32_Word st_name;
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Elf32_Addr st_value;
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Elf32_Word st_size;
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unsigned char st_info;
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unsigned char st_other;
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Elf32_Half st_shndx;
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} Elf32_Sym;
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#define ELF32_ST_BIND(i) ((i)>>4)
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#define ELF32_ST_TYPE(i) ((i)&0xf)
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#define ELF32_ST_INFO(b,t) (((b)<<4)+((t)&0xf))
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// ST_BIND
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#define STB_LOCAL 0
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#define STB_GLOBAL 1
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#define STB_WEAK 2
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#define STB_LOPROC 13
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#define STB_HIPROC 15
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// ST_TYPE
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#define STT_NOTYPE 0
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#define STT_OBJECT 1
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#define STT_FUNC 2
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#define STT_SECTION 3
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#define STT_FILE 4
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#define STT_LOPROC 13
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#define STT_HIPROC 15
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//----------------------------------------------------------------------
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// Relocation Entries
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//----------------------------------------------------------------------
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typedef struct Elf32_Rel_Tag
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{
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Elf32_Addr r_offset;
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Elf32_Word r_info;
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} Elf32_Rel;
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typedef struct Elf32_Rela_Tag
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{
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Elf32_Addr r_offset;
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Elf32_Word r_info;
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Elf32_Sword r_addend;
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} Elf32_Rela;
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#define ELF32_R_SYM(i) ((i)>>8)
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#define ELF32_R_TYPE(i) ((unsignedchar)(i))
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#define ELF32_R_INFO(s,t) (((s)<<8)+(unsignedchar)(t))
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//----------------------------------------------------------------------
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// Program Headers
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//----------------------------------------------------------------------
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typedef struct Elf32_Phdr_Tag
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{
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Elf32_Word p_type;
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Elf32_Off p_offset;
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Elf32_Addr p_vaddr;
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Elf32_Addr p_paddr;
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Elf32_Word p_filesz;
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Elf32_Word p_memsz;
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Elf32_Word p_flags;
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Elf32_Word p_align;
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} Elf32_Phdr;
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//----------------------------------------------------------------------
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// Program Header Type (p_type)
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//----------------------------------------------------------------------
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#define PT_NULL 0
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#define PT_LOAD 1
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#define PT_DYNAMIC 2
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#define PT_INTERP 3
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#define PT_NOTE 4
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#define PT_SHLIB 5
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#define PT_PHDR 6
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#define PT_LOPROC 0x70000000
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#define PT_HIPROC 0x7fffffff
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#define PF_X (1 << 0) // executable
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#define PF_W (1 << 1) // writable
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#define PF_R (1 << 2) // readable
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#endif // __elf_h__
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