Add Elf 32 Support to Courgette.

courgette/types_elf.h

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COURGETTE_ELF_TYPES_H_
+#define COURGETTE_ELF_TYPES_H_
+
+//
+// This header defines various types from the ELF file spec, but no code
+// related to using them.
+//
+
+typedef uint32 Elf32_Addr; // Unsigned program address
+typedef uint16 Elf32_Half; // Unsigned medium integer
+typedef uint32 Elf32_Off; // Unsigned file offset
+typedef int32 Elf32_Sword; // Signed large integer
+typedef uint32 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;
+};
+
+// 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_x86_64 = 62, // Intel x86-64 Architecture
+  // Other values skipped
+};
+
+// 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_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_ELF_TYPES_H_