diff options
Diffstat (limited to 'include/Support/ELF.h')
| -rw-r--r-- | include/Support/ELF.h | 295 |
1 files changed, 0 insertions, 295 deletions
diff --git a/include/Support/ELF.h b/include/Support/ELF.h deleted file mode 100644 index e4b87b9..0000000 --- a/include/Support/ELF.h +++ /dev/null @@ -1,295 +0,0 @@ -//===-- Support/ELF.h - ELF constants and data structures -------*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file was developed by the LLVM research group and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This header contains common, non-processor-specific data structures and -// constants for the ELF file format. -// -// The details of the ELF32 bits in this file are largely based on -// the Tool Interface Standard (TIS) Executable and Linking Format -// (ELF) Specification Version 1.2, May 1995. The ELF64 stuff is not -// standardized, as far as I can tell. It was largely based on information -// I found in OpenBSD header files. -// -//===----------------------------------------------------------------------===// - -#include "Support/DataTypes.h" -#include <cstring> -#include <cstdlib> - -namespace llvm { - -namespace ELF { - -typedef uint32_t Elf32_Addr; // Program address -typedef uint16_t Elf32_Half; -typedef uint32_t Elf32_Off; // File offset -typedef int32_t Elf32_Sword; -typedef uint32_t Elf32_Word; - -typedef uint64_t Elf64_Addr; -typedef uint64_t Elf64_Off; -typedef int32_t Elf64_Shalf; -typedef int32_t Elf64_Sword; -typedef uint32_t Elf64_Word; -typedef int64_t Elf64_Sxword; -typedef uint64_t Elf64_Xword; -typedef uint32_t Elf64_Half; -typedef uint16_t Elf64_Quarter; - -// Object file magic string. -static const char ElfMagic[] = { 0x7f, 'E', 'L', 'F', '\0' }; - -struct Elf32_Ehdr { - unsigned char e_ident[16]; // ELF Identification bytes - Elf32_Half e_type; // Type of file (see ET_* below) - Elf32_Half e_machine; // Required architecture for this file (see EM_*) - Elf32_Word e_version; // Must be equal to 1 - Elf32_Addr e_entry; // Address to jump to in order to start program - Elf32_Off e_phoff; // Program header table's file offset, in bytes - Elf32_Off e_shoff; // Section header table's file offset, in bytes - Elf32_Word e_flags; // Processor-specific flags - Elf32_Half e_ehsize; // Size of ELF header, in bytes - Elf32_Half e_phentsize; // Size of an entry in the program header table - Elf32_Half e_phnum; // Number of entries in the program header table - Elf32_Half e_shentsize; // Size of an entry in the section header table - Elf32_Half e_shnum; // Number of entries in the section header table - Elf32_Half e_shstrndx; // Sect hdr table index of sect name string table - bool checkMagic () const { - return (memcmp (e_ident, ElfMagic, strlen (ElfMagic))) == 0; - } - unsigned char getFileClass () const { return e_ident[4]; } - unsigned char getDataEncoding () { return e_ident[5]; } -}; - -// 64-bit ELF header. Fields are the same as for ELF32, but with different -// types (see above). -struct Elf64_Ehdr { - unsigned char e_ident[16]; - Elf64_Quarter e_type; - Elf64_Quarter e_machine; - Elf64_Half e_version; - Elf64_Addr e_entry; - Elf64_Off e_phoff; - Elf64_Off e_shoff; - Elf64_Half e_flags; - Elf64_Quarter e_ehsize; - Elf64_Quarter e_phentsize; - Elf64_Quarter e_phnum; - Elf64_Quarter e_shentsize; - Elf64_Quarter e_shnum; - Elf64_Quarter e_shstrndx; -}; - -// File types -enum { - ET_NONE = 0, // No file type - ET_REL = 1, // Relocatable file - ET_EXEC = 2, // Executable file - ET_DYN = 3, // Shared object file - ET_CORE = 4, // Core file - ET_LOPROC = 0xff00, // Beginning of processor-specific codes - ET_HIPROC = 0xffff // Processor-specific -}; - -// Machine architectures -enum { - EM_NONE = 0, // No machine - EM_M32 = 1, // AT&T WE 32100 - EM_SPARC = 2, // SPARC - EM_386 = 3, // Intel 386 - EM_68K = 4, // Motorola 68000 - EM_88K = 5, // Motorola 88000 - EM_486 = 6, // Intel 486 (deprecated) - EM_860 = 7, // Intel 80860 - EM_MIPS = 8, // MIPS R3000 - EM_PPC = 20, // PowerPC - EM_ARM = 40, // ARM - EM_ALPHA = 41, // DEC Alpha - EM_SPARCV9 = 43 // SPARC V9 -}; - -// Object file classes. -enum { - ELFCLASS32 = 1, // 32-bit object file - ELFCLASS64 = 2 // 64-bit object file -}; - -// Object file byte orderings. -enum { - ELFDATA2LSB = 1, // Little-endian object file - ELFDATA2MSB = 2 // Big-endian object file -}; - -// Section header. -struct Elf32_Shdr { - Elf32_Word sh_name; // Section name (index into string table) - Elf32_Word sh_type; // Section type (SHT_*) - Elf32_Word sh_flags; // Section flags (SHF_*) - Elf32_Addr sh_addr; // Address where section is to be loaded - Elf32_Off sh_offset; // File offset of section data, in bytes - Elf32_Word sh_size; // Size of section, in bytes - Elf32_Word sh_link; // Section type-specific header table index link - Elf32_Word sh_info; // Section type-specific extra information - Elf32_Word sh_addralign; // Section address alignment - Elf32_Word sh_entsize; // Size of records contained within the section -}; - -// Section header for ELF64 - same fields as ELF32, different types. -struct Elf64_Shdr { - Elf64_Half sh_name; - Elf64_Half sh_type; - Elf64_Xword sh_flags; - Elf64_Addr sh_addr; - Elf64_Off sh_offset; - Elf64_Xword sh_size; - Elf64_Half sh_link; - Elf64_Half sh_info; - Elf64_Xword sh_addralign; - Elf64_Xword sh_entsize; -}; - -// Special section indices. -enum { - SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless - SHN_LORESERVE = 0xff00, // Lowest reserved index - SHN_LOPROC = 0xff00, // Lowest processor-specific index - SHN_HIPROC = 0xff1f, // Highest processor-specific index - SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation - SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables - SHN_HIRESERVE = 0xffff // Highest reserved index -}; - -// Section types. -enum { - SHT_NULL = 0, // No associated section (inactive entry). - SHT_PROGBITS = 1, // Program-defined contents. - SHT_SYMTAB = 2, // Symbol table. - SHT_STRTAB = 3, // String table. - SHT_RELA = 4, // Relocation entries; explicit addends. - SHT_HASH = 5, // Symbol hash table. - SHT_DYNAMIC = 6, // Information for dynamic linking. - SHT_NOTE = 7, // Information about the file. - SHT_NOBITS = 8, // Data occupies no space in the file. - SHT_REL = 9, // Relocation entries; no explicit addends. - SHT_SHLIB = 10, // Reserved. - SHT_DYNSYM = 11, // Symbol table. - SHT_LOPROC = 0x70000000, // Lowest processor architecture-specific type. - SHT_HIPROC = 0x7fffffff, // Highest processor architecture-specific type. - SHT_LOUSER = 0x80000000, // Lowest type reserved for applications. - SHT_HIUSER = 0xffffffff // Highest type reserved for applications. -}; - -// Section flags. -enum { - SHF_WRITE = 0x1, // Section data should be writable during execution. - SHF_ALLOC = 0x2, // Section occupies memory during program execution. - SHF_EXECINSTR = 0x4, // Section contains executable machine instructions. - SHF_MASKPROC = 0xf0000000 // Bits indicating processor-specific flags. -}; - -// Symbol table entries. -struct Elf32_Sym { - Elf32_Word st_name; // Symbol name (index into string table) - Elf32_Addr st_value; // Value or address associated with the symbol - Elf32_Word st_size; // Size of the symbol - unsigned char st_info; // Symbol's type and binding attributes - unsigned char st_other; // Must be zero; reserved - Elf32_Half st_shndx; // Which section (header table index) it's defined in - - // These accessors and mutators correspond to the ELF32_ST_BIND, - // ELF32_ST_TYPE, and ELF32_ST_INFO macros defined in the ELF specification: - unsigned char getBinding () const { return st_info >> 4; } - unsigned char getType () const { return st_info & 0x0f; } - void setBinding (unsigned char b) { setBindingAndType (b, getType ()); } - void setType (unsigned char t) { setBindingAndType (getBinding (), t); } - void setBindingAndType (unsigned char b, unsigned char t) { - st_info = (b << 4) + (t & 0x0f); - } -}; - -// Symbol bindings. -enum { - STB_LOCAL = 0, // Local symbol, not visible outside obj file containing def - STB_GLOBAL = 1, // Global symbol, visible to all object files being combined - STB_WEAK = 2, // Weak symbol, like global but lower-precedence - STB_LOPROC = 13, // Lowest processor-specific binding type - STB_HIPROC = 15 // Highest processor-specific binding type -}; - -// Symbol types. -enum { - STT_NOTYPE = 0, // Symbol's type is not specified - STT_OBJECT = 1, // Symbol is a data object (variable, array, etc.) - STT_FUNC = 2, // Symbol is executable code (function, etc.) - STT_SECTION = 3, // Symbol refers to a section - STT_FILE = 4, // Local, absolute symbol that refers to a file - STT_LOPROC = 13, // Lowest processor-specific symbol type - STT_HIPROC = 15 // Highest processor-specific symbol type -}; - -// Relocation entry, without explicit addend. -struct Elf32_Rel { - Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) - Elf32_Word r_info; // Symbol table index and type of relocation to apply - - // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, - // and ELF32_R_INFO macros defined in the ELF specification: - Elf32_Word getSymbol () const { return (r_info >> 8); } - unsigned char getType () const { return (unsigned char) (r_info & 0x0ff); } - void setSymbol (Elf32_Word s) { setSymbolAndType (s, getType ()); } - void setType (unsigned char t) { setSymbolAndType (getSymbol(), t); } - void setSymbolAndType (Elf32_Word s, unsigned char t) { - r_info = (s << 8) + t; - }; -}; - -// Relocation entry with explicit addend. -struct Elf32_Rela { - Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr) - Elf32_Word r_info; // Symbol table index and type of relocation to apply - Elf32_Sword r_addend; // Compute value for relocatable field by adding this - - // These accessors and mutators correspond to the ELF32_R_SYM, ELF32_R_TYPE, - // and ELF32_R_INFO macros defined in the ELF specification: - Elf32_Word getSymbol () const { return (r_info >> 8); } - unsigned char getType () const { return (unsigned char) (r_info & 0x0ff); } - void setSymbol (Elf32_Word s) { setSymbolAndType (s, getType ()); } - void setType (unsigned char t) { setSymbolAndType (getSymbol(), t); } - void setSymbolAndType (Elf32_Word s, unsigned char t) { - r_info = (s << 8) + t; - }; -}; - -// Program header. -struct Elf32_Phdr { - Elf32_Word p_type; // Type of segment - Elf32_Off p_offset; // File offset where segment is located, in bytes - Elf32_Addr p_vaddr; // Virtual address of beginning of segment - Elf32_Addr p_paddr; // Physical address of beginning of segment (OS-specific) - Elf32_Word p_filesz; // Num. of bytes in file image of segment (may be zero) - Elf32_Word p_memsz; // Num. of bytes in mem image of segment (may be zero) - Elf32_Word p_flags; // Segment flags - Elf32_Word p_align; // Segment alignment constraint -}; - -enum { - PT_NULL = 0, // Unused segment. - PT_LOAD = 1, // Loadable segment. - PT_DYNAMIC = 2, // Dynamic linking information. - PT_INTERP = 3, // Interpreter pathname. - PT_NOTE = 4, // Auxiliary information. - PT_SHLIB = 5, // Reserved. - PT_PHDR = 6, // The program header table itself. - PT_LOPROC = 0x70000000, // Lowest processor-specific program hdr entry type. - PT_HIPROC = 0x7fffffff // Highest processor-specific program hdr entry type. -}; - -} // end namespace ELF - -} // end namespace llvm |