courgette/types_elf.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COURGETTE_ELF_TYPES_H_
   6 #define COURGETTE_ELF_TYPES_H_
   7
   8 //
   9 // This header defines various types from the ELF file spec, but no code
  10 // related to using them.
  11 //
  12
  13 typedef uint32 Elf32_Addr;  // Unsigned program address
  14 typedef uint16 Elf32_Half;  // Unsigned medium integer
  15 typedef uint32 Elf32_Off;  // Unsigned file offset
  16 typedef int32 Elf32_Sword;  // Signed large integer
  17 typedef uint32 Elf32_Word;  // Unsigned large integer
  18
  19
  20 // The header at the top of the file
  21 struct Elf32_Ehdr {
  22   unsigned char  e_ident[16];
  23   Elf32_Half     e_type;
  24   Elf32_Half     e_machine;
  25   Elf32_Word     e_version;
  26   Elf32_Addr     e_entry;
  27   Elf32_Off      e_phoff;
  28   Elf32_Off      e_shoff;
  29   Elf32_Word     e_flags;
  30   Elf32_Half     e_ehsize;
  31   Elf32_Half     e_phentsize;
  32   Elf32_Half     e_phnum;
  33   Elf32_Half     e_shentsize;
  34   Elf32_Half     e_shnum;
  35   Elf32_Half     e_shstrndx;
  36 };
  37
  38 // values for header->e_type
  39 enum e_type_values {
  40   ET_NONE = 0,  // No file type
  41   ET_REL = 1,  // Relocatable file
  42   ET_EXEC = 2,  // Executable file
  43   ET_DYN = 3,  // Shared object file
  44   ET_CORE = 4,  // Core file
  45   ET_LOPROC = 0xff00,  // Processor-specific
  46   ET_HIPROC = 0xfff  // Processor-specific
  47 };
  48
  49 // values for header->e_machine
  50 enum e_machine_values {
  51   EM_NONE = 0,  // No machine
  52   EM_386 = 3,  // Intel Architecture
  53   EM_ARM = 40,  // ARM Architecture
  54   EM_x86_64 = 62,  // Intel x86-64 Architecture
  55   // Other values skipped
  56 };
  57
  58 // A section header in the section header table
  59 struct Elf32_Shdr {
  60   Elf32_Word   sh_name;
  61   Elf32_Word   sh_type;
  62   Elf32_Word   sh_flags;
  63   Elf32_Addr   sh_addr;
  64   Elf32_Off    sh_offset;
  65   Elf32_Word   sh_size;
  66   Elf32_Word   sh_link;
  67   Elf32_Word   sh_info;
  68   Elf32_Word   sh_addralign;
  69   Elf32_Word   sh_entsize;
  70 };
  71
  72 // Values for the section type field in a section header
  73 enum sh_type_values {
  74   SHT_NULL = 0,
  75   SHT_PROGBITS = 1,
  76   SHT_SYMTAB = 2,
  77   SHT_STRTAB = 3,
  78   SHT_RELA = 4,
  79   SHT_HASH = 5,
  80   SHT_DYNAMIC = 6,
  81   SHT_NOTE = 7,
  82   SHT_NOBITS = 8,
  83   SHT_REL = 9,
  84   SHT_SHLIB = 10,
  85   SHT_DYNSYM = 11,
  86   SHT_INIT_ARRAY = 14,
  87   SHT_FINI_ARRAY = 15,
  88   SHT_LOPROC = 0x70000000,
  89   SHT_HIPROC = 0x7fffffff,
  90   SHT_LOUSER = 0x80000000,
  91   SHT_HIUSER = 0xffffffff,
  92 };
  93
  94 struct Elf32_Phdr {
  95   Elf32_Word    p_type;
  96   Elf32_Off     p_offset;
  97   Elf32_Addr    p_vaddr;
  98   Elf32_Addr    p_paddr;
  99   Elf32_Word    p_filesz;
 100   Elf32_Word    p_memsz;
 101   Elf32_Word    p_flags;
 102   Elf32_Word    p_align;
 103 };
 104
 105 // Values for the segment type field in a program segment header
 106 enum ph_type_values {
 107   PT_NULL = 0,
 108   PT_LOAD = 1,
 109   PT_DYNAMIC = 2,
 110   PT_INTERP = 3,
 111   PT_NOTE = 4,
 112   PT_SHLIB = 5,
 113   PT_PHDR = 6,
 114   PT_LOPROC = 0x70000000,
 115   PT_HIPROC = 0x7fffffff
 116 };
 117
 118 struct Elf32_Rel {
 119   Elf32_Addr    r_offset;
 120   Elf32_Word    r_info;
 121 };
 122
 123 struct Elf32_Rela {
 124   Elf32_Addr    r_offset;
 125   Elf32_Word    r_info;
 126   Elf32_Sword   r_addend;
 127 };
 128
 129 enum elf32_rel_386_type_values {
 130   R_386_NONE = 0,
 131   R_386_32 = 1,
 132   R_386_PC32 = 2,
 133   R_386_GOT32 = 3,
 134   R_386_PLT32 = 4,
 135   R_386_COPY = 5,
 136   R_386_GLOB_DAT = 6,
 137   R_386_JMP_SLOT = 7,
 138   R_386_RELATIVE = 8,
 139   R_386_GOTOFF = 9,
 140   R_386_GOTPC = 10,
 141   R_386_TLS_TPOFF = 14,
 142 };
 143
 144 enum elf32_rel_arm_type_values {
 145   R_ARM_RELATIVE = 23,
 146 };
 147
 148 #endif  // COURGETTE_ELF_TYPES_H_