types_elf.h revision 5821806d5e7f356e8fa4b058a389a808ea183019 
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
13typedef uint32 Elf32_Addr; // Unsigned program address
14typedef uint16 Elf32_Half; // Unsigned medium integer
15typedef uint32 Elf32_Off; // Unsigned file offset
16typedef int32 Elf32_Sword; // Signed large integer
17typedef uint32 Elf32_Word; // Unsigned large integer
18
19
20// The header at the top of the file
21struct 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
39enum 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
50enum e_machine_values {
51  EM_NONE = 0, // No machine
52  EM_386 = 3, // Intel Architecture
53  EM_x86_64 = 62, // Intel x86-64 Architecture
54  // Other values skipped
55};
56
57// A section header in the section header table
58struct Elf32_Shdr {
59  Elf32_Word   sh_name;
60  Elf32_Word   sh_type;
61  Elf32_Word   sh_flags;
62  Elf32_Addr   sh_addr;
63  Elf32_Off    sh_offset;
64  Elf32_Word   sh_size;
65  Elf32_Word   sh_link;
66  Elf32_Word   sh_info;
67  Elf32_Word   sh_addralign;
68  Elf32_Word   sh_entsize;
69};
70
71// Values for the section type field in a section header
72enum sh_type_values {
73  SHT_NULL = 0,
74  SHT_PROGBITS = 1,
75  SHT_SYMTAB = 2,
76  SHT_STRTAB = 3,
77  SHT_RELA = 4,
78  SHT_HASH = 5,
79  SHT_DYNAMIC = 6,
80  SHT_NOTE = 7,
81  SHT_NOBITS = 8,
82  SHT_REL = 9,
83  SHT_SHLIB = 10,
84  SHT_DYNSYM = 11,
85  SHT_LOPROC = 0x70000000,
86  SHT_HIPROC = 0x7fffffff,
87  SHT_LOUSER = 0x80000000,
88  SHT_HIUSER = 0xffffffff,
89};
90
91struct Elf32_Phdr {
92  Elf32_Word    p_type;
93  Elf32_Off     p_offset;
94  Elf32_Addr    p_vaddr;
95  Elf32_Addr    p_paddr;
96  Elf32_Word    p_filesz;
97  Elf32_Word    p_memsz;
98  Elf32_Word    p_flags;
99  Elf32_Word    p_align;
100};
101
102// Values for the segment type field in a program segment header
103enum ph_type_values {
104  PT_NULL = 0,
105  PT_LOAD = 1,
106  PT_DYNAMIC = 2,
107  PT_INTERP = 3,
108  PT_NOTE = 4,
109  PT_SHLIB = 5,
110  PT_PHDR = 6,
111  PT_LOPROC = 0x70000000,
112  PT_HIPROC = 0x7fffffff
113};
114
115struct Elf32_Rel {
116  Elf32_Addr    r_offset;
117  Elf32_Word    r_info;
118};
119
120struct Elf32_Rela {
121  Elf32_Addr    r_offset;
122  Elf32_Word    r_info;
123  Elf32_Sword   r_addend;
124};
125
126enum elf32_rel_386_type_values {
127  R_386_NONE = 0,
128  R_386_32 = 1,
129  R_386_PC32 = 2,
130  R_386_GOT32 = 3,
131  R_386_PLT32 = 4,
132  R_386_COPY = 5,
133  R_386_GLOB_DAT = 6,
134  R_386_JMP_SLOT = 7,
135  R_386_RELATIVE = 8,
136  R_386_GOTOFF = 9,
137  R_386_GOTPC = 10,
138  R_386_TLS_TPOFF = 14,
139};
140
141#endif  // COURGETTE_ELF_TYPES_H_
142