-//===-- Support/ELF.h - ELF constants and data structures -------*- C++ -*-===//
-//
+//===-- llvm/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 file 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 this file are largely based on the Tool Interface Standard
-// (TIS) Executable and Linking Format (ELF) Specification Version 1.2,
-// May 1995.
+//
+// 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"
+#ifndef LLVM_SUPPORT_ELF_H
+#define LLVM_SUPPORT_ELF_H
+
+#include "llvm/System/DataTypes.h"
#include <cstring>
-#include <cstdlib>
namespace llvm {
// 64-bit ELF header. Fields are the same as for ELF32, but with different
// types (see above).
-typedef struct {
+struct Elf64_Ehdr {
unsigned char e_ident[16];
Elf64_Quarter e_type;
Elf64_Quarter e_machine;
Elf64_Quarter e_shentsize;
Elf64_Quarter e_shnum;
Elf64_Quarter e_shstrndx;
-} Elf64_Ehdr;
+};
// File types
enum {
ET_HIPROC = 0xffff // Processor-specific
};
+// Versioning
+enum {
+ EV_NONE = 0,
+ EV_CURRENT = 1
+};
+
// Machine architectures
enum {
EM_NONE = 0, // No machine
EM_PPC = 20, // PowerPC
EM_ARM = 40, // ARM
EM_ALPHA = 41, // DEC Alpha
- EM_SPARCV9 = 43 // SPARC V9
+ EM_SPARCV9 = 43, // SPARC V9
+ EM_X86_64 = 62 // AMD64
};
// Object file classes.
ELFDATA2MSB = 2 // Big-endian object file
};
+// OS ABI identification -- unused.
+enum {
+ ELFOSABI_NONE = 0
+};
+
// Section header.
struct Elf32_Shdr {
Elf32_Word sh_name; // Section name (index into string table)
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_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.
-typedef struct {
+struct Elf64_Shdr {
Elf64_Half sh_name;
Elf64_Half sh_type;
Elf64_Xword sh_flags;
Elf64_Half sh_info;
Elf64_Xword sh_addralign;
Elf64_Xword sh_entsize;
-} Elf64_Shdr;
+};
// Special section indices.
enum {
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; }
// Relocation entry, without explicit addend.
struct Elf32_Rel {
- Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
+ 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); }
// Relocation entry with explicit addend.
struct Elf32_Rela {
- Elf32_Addr r_offset; // Location (file byte offset, or program virtual addr)
+ 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); }
Elf32_Word p_align; // Segment alignment constraint
};
+// Segment types.
enum {
PT_NULL = 0, // Unused segment.
PT_LOAD = 1, // Loadable segment.
PT_HIPROC = 0x7fffffff // Highest processor-specific program hdr entry type.
};
+// Segment flag bits.
+enum {
+ PF_X = 1, // Execute
+ PF_W = 2, // Write
+ PF_R = 4, // Read
+ PF_MASKPROC = 0xf0000000 // Unspecified
+};
+
} // end namespace ELF
} // end namespace llvm
+
+#endif