llvm-6502/include/llvm/Target/TargetELFWriterInfo.h

91 lines
2.9 KiB
C++

//===-- llvm/Target/TargetELFWriterInfo.h - ELF Writer Info -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the TargetELFWriterInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TARGET_TARGETELFWRITERINFO_H
#define LLVM_TARGET_TARGETELFWRITERINFO_H
namespace llvm {
class Function;
class TargetData;
class TargetMachine;
//===--------------------------------------------------------------------===//
// TargetELFWriterInfo
//===--------------------------------------------------------------------===//
class TargetELFWriterInfo {
protected:
// EMachine - This field is the target specific value to emit as the
// e_machine member of the ELF header.
unsigned short EMachine;
TargetMachine &TM;
bool is64Bit, isLittleEndian;
public:
// Machine architectures
enum MachineType {
EM_NONE = 0, // No machine
EM_M32 = 1, // AT&T WE 32100
EM_SPARC = 2, // SPARC
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_PPC = 20, // PowerPC
EM_ARM = 40, // ARM
EM_ALPHA = 41, // DEC Alpha
EM_SPARCV9 = 43, // SPARC V9
EM_X86_64 = 62 // AMD64
};
// ELF File classes
enum {
ELFCLASS32 = 1, // 32-bit object file
ELFCLASS64 = 2 // 64-bit object file
};
// ELF Endianess
enum {
ELFDATA2LSB = 1, // Little-endian object file
ELFDATA2MSB = 2 // Big-endian object file
};
explicit TargetELFWriterInfo(TargetMachine &tm);
virtual ~TargetELFWriterInfo();
unsigned short getEMachine() const { return EMachine; }
unsigned getEFlags() const { return 0; }
unsigned getEIClass() const { return is64Bit ? ELFCLASS64 : ELFCLASS32; }
unsigned getEIData() const {
return isLittleEndian ? ELFDATA2LSB : ELFDATA2MSB;
}
/// ELF Header and ELF Section Header Info
unsigned getHdrSize() const { return is64Bit ? 64 : 52; }
unsigned getSHdrSize() const { return is64Bit ? 64 : 40; }
/// Symbol Table Info
unsigned getSymTabEntrySize() const { return is64Bit ? 24 : 16; }
unsigned getSymTabAlignment() const { return is64Bit ? 8 : 4; }
/// getFunctionAlignment - Returns the alignment for function 'F', targets
/// with different alignment constraints should overload this method
virtual unsigned getFunctionAlignment(const Function *F) const;
};
} // end llvm namespace
#endif // LLVM_TARGET_TARGETELFWRITERINFO_H