-//===-- 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 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/Support/DataTypes.h"
#include <cstring>
#include <cstdlib>
typedef int32_t Elf32_Sword;
typedef uint32_t Elf32_Word;
+typedef uint64_t Elf64_Addr;
+typedef uint64_t Elf64_Off;
+typedef int32_t Elf64_Shalf;
+typedef int32_t Elf64_Sword;
+typedef uint32_t Elf64_Word;
+typedef int64_t Elf64_Sxword;
+typedef uint64_t Elf64_Xword;
+typedef uint32_t Elf64_Half;
+typedef uint16_t Elf64_Quarter;
+
// Object file magic string.
-static const char *ElfMagic = "\x7fELF";
+static const char ElfMagic[] = { 0x7f, 'E', 'L', 'F', '\0' };
struct Elf32_Ehdr {
unsigned char e_ident[16]; // ELF Identification bytes
Elf32_Half e_shnum; // Number of entries in the section header table
Elf32_Half e_shstrndx; // Sect hdr table index of sect name string table
bool checkMagic () const {
- return (memcmp (e_ident, ElfMagic, strlen (ElfMagic)) == 0;
+ return (memcmp (e_ident, ElfMagic, strlen (ElfMagic))) == 0;
}
unsigned char getFileClass () const { return e_ident[4]; }
unsigned char getDataEncoding () { return e_ident[5]; }
};
+// 64-bit ELF header. Fields are the same as for ELF32, but with different
+// types (see above).
+struct Elf64_Ehdr {
+ unsigned char e_ident[16];
+ Elf64_Quarter e_type;
+ Elf64_Quarter e_machine;
+ Elf64_Half e_version;
+ Elf64_Addr e_entry;
+ Elf64_Off e_phoff;
+ Elf64_Off e_shoff;
+ Elf64_Half e_flags;
+ Elf64_Quarter e_ehsize;
+ Elf64_Quarter e_phentsize;
+ Elf64_Quarter e_phnum;
+ Elf64_Quarter e_shentsize;
+ Elf64_Quarter e_shnum;
+ Elf64_Quarter e_shstrndx;
+};
+
// File types
enum {
ET_NONE = 0, // No file type
EM_386 = 3, // Intel 386
EM_68K = 4, // Motorola 68000
EM_88K = 5, // Motorola 88000
+ EM_486 = 6, // Intel 486 (deprecated)
EM_860 = 7, // Intel 80860
- EM_MIPS = 8 // MIPS R3000
+ EM_MIPS = 8, // MIPS R3000
+ EM_PPC = 20, // PowerPC
+ EM_ARM = 40, // ARM
+ EM_ALPHA = 41, // DEC Alpha
+ EM_SPARCV9 = 43 // SPARC V9
};
// Object file classes.
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.
+struct Elf64_Shdr {
+ Elf64_Half sh_name;
+ Elf64_Half sh_type;
+ Elf64_Xword sh_flags;
+ Elf64_Addr sh_addr;
+ Elf64_Off sh_offset;
+ Elf64_Xword sh_size;
+ Elf64_Half sh_link;
+ Elf64_Half sh_info;
+ Elf64_Xword sh_addralign;
+ Elf64_Xword sh_entsize;
+};
+
// Special section indices.
enum {
SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless
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); }
unsigned char getType () const { return (unsigned char) (r_info & 0x0ff); }
- void setSymbol (Elf32_Word s) const { setSymbolAndType (s, getType ()); }
- void setType (unsigned char t) const { setSymbolAndType (getSymbol(), t); }
+ void setSymbol (Elf32_Word s) { setSymbolAndType (s, getType ()); }
+ void setType (unsigned char t) { setSymbolAndType (getSymbol(), t); }
void setSymbolAndType (Elf32_Word s, unsigned char t) {
r_info = (s << 8) + t;
};
// 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); }
unsigned char getType () const { return (unsigned char) (r_info & 0x0ff); }
- void setSymbol (Elf32_Word s) const { setSymbolAndType (s, getType ()); }
- void setType (unsigned char t) const { setSymbolAndType (getSymbol(), t); }
+ void setSymbol (Elf32_Word s) { setSymbolAndType (s, getType ()); }
+ void setType (unsigned char t) { setSymbolAndType (getSymbol(), t); }
void setSymbolAndType (Elf32_Word s, unsigned char t) {
r_info = (s << 8) + t;
};
} // end namespace ELF
} // end namespace llvm
+
+#endif
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