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Diffstat (limited to 'contrib/llvm/lib/Target/X86/X86ELFWriterInfo.h')
-rw-r--r-- | contrib/llvm/lib/Target/X86/X86ELFWriterInfo.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/X86/X86ELFWriterInfo.h b/contrib/llvm/lib/Target/X86/X86ELFWriterInfo.h new file mode 100644 index 0000000..342e6e6 --- /dev/null +++ b/contrib/llvm/lib/Target/X86/X86ELFWriterInfo.h @@ -0,0 +1,76 @@ +//===-- X86ELFWriterInfo.h - ELF Writer Info for X86 ------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements ELF writer information for the X86 backend. +// +//===----------------------------------------------------------------------===// + +#ifndef X86_ELF_WRITER_INFO_H +#define X86_ELF_WRITER_INFO_H + +#include "llvm/Target/TargetELFWriterInfo.h" + +namespace llvm { + + class X86ELFWriterInfo : public TargetELFWriterInfo { + + // ELF Relocation types for X86 + enum X86RelocationType { + R_386_NONE = 0, + R_386_32 = 1, + R_386_PC32 = 2 + }; + + // ELF Relocation types for X86_64 + enum X86_64RelocationType { + R_X86_64_NONE = 0, + R_X86_64_64 = 1, + R_X86_64_PC32 = 2, + R_X86_64_32 = 10, + R_X86_64_32S = 11, + R_X86_64_PC64 = 24 + }; + + public: + X86ELFWriterInfo(TargetMachine &TM); + virtual ~X86ELFWriterInfo(); + + /// getRelocationType - Returns the target specific ELF Relocation type. + /// 'MachineRelTy' contains the object code independent relocation type + virtual unsigned getRelocationType(unsigned MachineRelTy) const; + + /// hasRelocationAddend - True if the target uses an addend in the + /// ELF relocation entry. + virtual bool hasRelocationAddend() const { return is64Bit ? true : false; } + + /// getDefaultAddendForRelTy - Gets the default addend value for a + /// relocation entry based on the target ELF relocation type. + virtual long int getDefaultAddendForRelTy(unsigned RelTy, + long int Modifier = 0) const; + + /// getRelTySize - Returns the size of relocatable field in bits + virtual unsigned getRelocationTySize(unsigned RelTy) const; + + /// isPCRelativeRel - True if the relocation type is pc relative + virtual bool isPCRelativeRel(unsigned RelTy) const; + + /// getJumpTableRelocationTy - Returns the machine relocation type used + /// to reference a jumptable. + virtual unsigned getAbsoluteLabelMachineRelTy() const; + + /// computeRelocation - Some relocatable fields could be relocated + /// directly, avoiding the relocation symbol emission, compute the + /// final relocation value for this symbol. + virtual long int computeRelocation(unsigned SymOffset, unsigned RelOffset, + unsigned RelTy) const; + }; + +} // end llvm namespace + +#endif // X86_ELF_WRITER_INFO_H |