llvm-6502/include/llvm/MC/MCWinCOFFObjectWriter.h
Nico Rieck 18d49acdab MC: Support COFF image-relative MCSymbolRefs
Add support for the COFF relocation types IMAGE_REL_I386_DIR32NB and
IMAGE_REL_AMD64_ADDR32NB for 32- and 64-bit respectively. These are
similar to normal 4-byte relocations except that they do not include
the base address of the image.

Image-relative relocations are used for debug information (32-bit) and
SEH unwind tables (64-bit).

A new MCSymbolRef variant called 'VK_COFF_IMGREL32' is introduced to
specify such relocations. For AT&T assembly, this variant can be accessed
using the symbol suffix '@imgrel'.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179240 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-10 23:28:17 +00:00

44 lines
1.3 KiB
C++

//===-- llvm/MC/MCWinCOFFObjectWriter.h - Win COFF Object Writer *- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCWINCOFFOBJECTWRITER_H
#define LLVM_MC_MCWINCOFFOBJECTWRITER_H
namespace llvm {
class MCFixup;
class MCObjectWriter;
class MCValue;
class raw_ostream;
class MCWinCOFFObjectTargetWriter {
const unsigned Machine;
protected:
MCWinCOFFObjectTargetWriter(unsigned Machine_);
public:
virtual ~MCWinCOFFObjectTargetWriter() {}
unsigned getMachine() const { return Machine; }
virtual unsigned getRelocType(const MCValue &Target,
const MCFixup &Fixup,
bool IsCrossSection) const = 0;
};
/// \brief Construct a new Win COFF writer instance.
///
/// \param MOTW - The target specific WinCOFF writer subclass.
/// \param OS - The stream to write to.
/// \returns The constructed object writer.
MCObjectWriter *createWinCOFFObjectWriter(MCWinCOFFObjectTargetWriter *MOTW,
raw_ostream &OS);
} // End llvm namespace
#endif