| //===-- 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__ |
| |
| //---------------------------------------------------------------------- |
| // Typedefs for ELF32. |
| //---------------------------------------------------------------------- |
| 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; |
| |
| //---------------------------------------------------------------------- |
| // Typedefs for ELF64. |
| //---------------------------------------------------------------------- |
| typedef uint16_t Elf64_Half; |
| typedef uint32_t Elf64_Word; |
| typedef int32_t Elf64_Sword; |
| typedef uint64_t Elf64_Xword; |
| typedef int64_t Elf64_Sxword; |
| typedef uint64_t Elf64_Addr; |
| typedef uint64_t Elf64_Off; |
| |
| #define EI_NIDENT 16 |
| |
| //---------------------------------------------------------------------- |
| // ELF Headers |
| //---------------------------------------------------------------------- |
| 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; |
| |
| typedef struct Elf64_Ehdr_Tag |
| { |
| unsigned char e_ident[EI_NIDENT]; |
| Elf64_Half e_type; |
| Elf64_Half e_machine; |
| Elf64_Word e_version; |
| Elf64_Addr e_entry; |
| Elf64_Off e_phoff; |
| Elf64_Off e_shoff; |
| Elf64_Word e_flags; |
| Elf64_Half e_ehsize; |
| Elf64_Half e_phentsize; |
| Elf64_Half e_phnum; |
| Elf64_Half e_shentsize; |
| Elf64_Half e_shnum; |
| Elf64_Half e_shstrndx; |
| } Elf64_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 |
| #define EM_X86_64 62 // AMD x86-64 |
| |
| |
| //---------------------------------------------------------------------- |
| // 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_CLASS definitions |
| //---------------------------------------------------------------------- |
| #define ELFCLASS32 1 // 32-bit object file |
| #define ELFCLASS64 2 // 64-bit object file |
| |
| //---------------------------------------------------------------------- |
| // EI_DATA definitions |
| //---------------------------------------------------------------------- |
| #define ELFDATANONE 0 // Invalid data encoding |
| #define ELFDATA2LSB 1 // Little Endian |
| #define ELFDATA2MSB 2 // Big Endian |
| |
| //---------------------------------------------------------------------- |
| // Section Headers |
| //---------------------------------------------------------------------- |
| 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; |
| |
| typedef struct Elf64_Shdr_Tag |
| { |
| Elf64_Word sh_name; |
| Elf64_Word sh_type; |
| Elf64_Xword sh_flags; |
| Elf64_Addr sh_addr; |
| Elf64_Off sh_offset; |
| Elf64_Xword sh_size; |
| Elf64_Word sh_link; |
| Elf64_Word sh_info; |
| Elf64_Xword sh_addralign; |
| Elf64_Xword sh_entsize; |
| } Elf64_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 Headers |
| //---------------------------------------------------------------------- |
| 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; |
| |
| typedef struct Elf64_Sym_Tag |
| { |
| Elf64_Word st_name; |
| unsigned char st_info; |
| unsigned char st_other; |
| Elf64_Half st_shndx; |
| Elf64_Addr st_value; |
| Elf64_Xword st_size; |
| } Elf64_Sym; |
| |
| //---------------------------------------------------------------------- |
| // Accessors to the binding and type bits in the st_info field of a |
| // symbol table entry. Valid for both 32 and 64 bit variations. |
| //---------------------------------------------------------------------- |
| #define ELF_ST_BIND(i) ((i)>>4) |
| #define ELF_ST_TYPE(i) ((i)&0xf) |
| #define ELF_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; |
| |
| typedef struct Elf64_Rel_Tag |
| { |
| Elf64_Addr r_offset; |
| Elf64_Word r_info; |
| } Elf64_Rel; |
| |
| typedef struct Elf64_Rela_Tag |
| { |
| Elf64_Addr r_offset; |
| Elf64_Word r_info; |
| Elf64_Sword r_addend; |
| } Elf64_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)) |
| |
| //---------------------------------------------------------------------- |
| // Dynamic Table Entry Headers |
| //---------------------------------------------------------------------- |
| typedef struct Elf64_Dyn_Tag |
| { |
| Elf64_Sxword d_tag; |
| union |
| { |
| Elf64_Xword d_val; |
| Elf64_Addr d_ptr; |
| } d_un; |
| } Elf64_Dyn; |
| |
| #define DT_NULL 0 // Marks end of dynamic array. |
| #define DT_NEEDED 1 // String table offset of needed library. |
| #define DT_PLTRELSZ 2 // Size of relocation entries in PLT. |
| #define DT_PLTGOT 3 // Address associated with linkage table. |
| #define DT_HASH 4 // Address of symbolic hash table. |
| #define DT_STRTAB 5 // Address of dynamic string table. |
| #define DT_SYMTAB 6 // Address of dynamic symbol table. |
| #define DT_RELA 7 // Address of relocation table (Rela entries). |
| #define DT_RELASZ 8 // Size of Rela relocation table. |
| #define DT_RELAENT 9 // Size of a Rela relocation entry. |
| #define DT_STRSZ 10 // Total size of the string table. |
| #define DT_SYMENT 11 // Size of a symbol table entry. |
| #define DT_INIT 12 // Address of initialization function. |
| #define DT_FINI 13 // Address of termination function. |
| #define DT_SONAME 14 // String table offset of a shared objects name. |
| #define DT_RPATH 15 // String table offset of library search path. |
| #define DT_SYMBOLIC 16 // Changes symbol resolution algorithm. |
| #define DT_REL 17 // Address of relocation table (Rel entries). |
| #define DT_RELSZ 18 // Size of Rel relocation table. |
| #define DT_RELENT 19 // Size of a Rel relocation entry. |
| #define DT_PLTREL 20 // Type of relocation entry used for linking. |
| #define DT_DEBUG 21 // Reserved for debugger. |
| #define DT_TEXTREL 22 // Relocations exist for non-writable segements. |
| #define DT_JMPREL 23 // Address of relocations associated with PLT. |
| #define DT_BIND_NOW 24 // Process all relocations before execution. |
| #define DT_INIT_ARRAY 25 // Pointer to array of initialization functions. |
| #define DT_FINI_ARRAY 26 // Pointer to array of termination functions. |
| #define DT_INIT_ARRAYSZ 27 // Size of DT_INIT_ARRAY. |
| #define DT_FINI_ARRAYSZ 28 // Size of DT_FINI_ARRAY. |
| #define DT_LOOS 0x60000000 // Start of environment specific tags. |
| #define DT_HIOS 0x6FFFFFFF // End of environment specific tags. |
| #define DT_LOPROC 0x70000000 // Start of processor specific tags. |
| #define DT_HIPROC 0x7FFFFFFF // End of processor specific tags. |
| |
| |
| //---------------------------------------------------------------------- |
| // 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; |
| |
| typedef struct Elf64_Phdr_Tag |
| { |
| Elf64_Word p_type; |
| Elf64_Off p_offset; |
| Elf64_Addr p_vaddr; |
| Elf64_Addr p_paddr; |
| Elf64_Word p_filesz; |
| Elf64_Word p_memsz; |
| Elf64_Word p_flags; |
| Elf64_Word p_align; |
| } Elf64_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__ |