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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COURGETTE_TYPES_ELF_H_
#define COURGETTE_TYPES_ELF_H_
#include <stdint.h>
//
// This header defines various types from the ELF file spec, but no code
// related to using them.
//
typedef uint32_t Elf32_Addr; // Unsigned program address
typedef uint16_t Elf32_Half; // Unsigned medium integer
typedef uint32_t Elf32_Off; // Unsigned file offset
typedef int32_t Elf32_Sword; // Signed large integer
typedef uint32_t Elf32_Word; // Unsigned large integer
// The header at the top of the file
struct Elf32_Ehdr {
unsigned char e_ident[16];
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;
};
// Indexes for header->e_ident[].
enum e_ident_indexes {
EI_MAG0 = 0, // File identification.
EI_MAG1 = 1, // File identification.
EI_MAG2 = 2, // File identification.
EI_MAG3 = 3, // File identification.
EI_CLASS = 4, // File class.
EI_DATA = 5, // Data encoding.
EI_VERSION = 6, // File version.
EI_OSABI = 7, // Operating system/ABI identification.
EI_ABIVERSION = 8, // ABI version.
EI_PAD = 9, // Start of padding bytes.
EI_NIDENT = 16 // Size of e_ident[].
};
// Values for header->e_ident[EI_CLASS].
enum e_ident_class_values {
ELFCLASSNONE = 0, // Invalid class.
ELFCLASS32 = 1, // 32-bit objects.
ELFCLASS64 = 2 // 64-bit objects.
};
// Values for header->e_ident[EI_DATA].
enum e_ident_data_values {
ELFDATANONE = 0, // Unknown data format.
ELFDATA2LSB = 1, // Two's complement, little-endian.
ELFDATA2MSB = 2, // Two's complement, big-endian.
};
// values for header->e_type
enum e_type_values {
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, // Processor-specific
ET_HIPROC = 0xfff // Processor-specific
};
// values for header->e_machine
enum e_machine_values {
EM_NONE = 0, // No machine
EM_386 = 3, // Intel Architecture
EM_ARM = 40, // ARM Architecture
EM_x86_64 = 62, // Intel x86-64 Architecture
// Other values skipped
};
enum { SHN_UNDEF = 0 };
// A section header in the section header table
struct Elf32_Shdr {
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;
};
// Values for the section type field in a section header
enum sh_type_values {
SHT_NULL = 0,
SHT_PROGBITS = 1,
SHT_SYMTAB = 2,
SHT_STRTAB = 3,
SHT_RELA = 4,
SHT_HASH = 5,
SHT_DYNAMIC = 6,
SHT_NOTE = 7,
SHT_NOBITS = 8,
SHT_REL = 9,
SHT_SHLIB = 10,
SHT_DYNSYM = 11,
SHT_INIT_ARRAY = 14,
SHT_FINI_ARRAY = 15,
SHT_LOPROC = 0x70000000,
SHT_HIPROC = 0x7fffffff,
SHT_LOUSER = 0x80000000,
SHT_HIUSER = 0xffffffff,
};
struct Elf32_Phdr {
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;
};
// Values for the segment type field in a program segment header
enum ph_type_values {
PT_NULL = 0,
PT_LOAD = 1,
PT_DYNAMIC = 2,
PT_INTERP = 3,
PT_NOTE = 4,
PT_SHLIB = 5,
PT_PHDR = 6,
PT_LOPROC = 0x70000000,
PT_HIPROC = 0x7fffffff
};
struct Elf32_Rel {
Elf32_Addr r_offset;
Elf32_Word r_info;
};
struct Elf32_Rela {
Elf32_Addr r_offset;
Elf32_Word r_info;
Elf32_Sword r_addend;
};
enum elf32_rel_386_type_values {
R_386_NONE = 0,
R_386_32 = 1,
R_386_PC32 = 2,
R_386_GOT32 = 3,
R_386_PLT32 = 4,
R_386_COPY = 5,
R_386_GLOB_DAT = 6,
R_386_JMP_SLOT = 7,
R_386_RELATIVE = 8,
R_386_GOTOFF = 9,
R_386_GOTPC = 10,
R_386_TLS_TPOFF = 14,
};
#endif // COURGETTE_TYPES_ELF_H_
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