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101 lines
2.8 KiB
C++
101 lines
2.8 KiB
C++
//===-- llvm/Support/Win64EH.h ---Win64 EH Constants-------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains constants and structures used for implementing
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// exception handling on Win64 platforms. For more information, see
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// http://msdn.microsoft.com/en-us/library/1eyas8tf.aspx
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_WIN64EH_H
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#define LLVM_SUPPORT_WIN64EH_H
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#include "llvm/Support/DataTypes.h"
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namespace llvm {
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namespace Win64EH {
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/// UnwindOpcodes - Enumeration whose values specify a single operation in
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/// the prolog of a function.
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enum UnwindOpcodes {
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UOP_PushNonVol = 0,
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UOP_AllocLarge,
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UOP_AllocSmall,
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UOP_SetFPReg,
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UOP_SaveNonVol,
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UOP_SaveNonVolBig,
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UOP_SaveXMM128 = 8,
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UOP_SaveXMM128Big,
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UOP_PushMachFrame
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};
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/// UnwindCode - This union describes a single operation in a function prolog,
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/// or part thereof.
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union UnwindCode {
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struct {
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uint8_t codeOffset;
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uint8_t unwindOp:4,
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opInfo:4;
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} u;
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uint16_t frameOffset;
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};
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enum {
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/// UNW_ExceptionHandler - Specifies that this function has an exception
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/// handler.
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UNW_ExceptionHandler = 0x01,
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/// UNW_TerminateHandler - Specifies that this function has a termination
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/// handler.
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UNW_TerminateHandler = 0x02,
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/// UNW_ChainInfo - Specifies that this UnwindInfo structure is chained to
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/// another one.
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UNW_ChainInfo = 0x04
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};
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/// RuntimeFunction - An entry in the table of functions with unwind info.
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struct RuntimeFunction {
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uint64_t startAddress;
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uint64_t endAddress;
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uint64_t unwindInfoOffset;
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};
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/// UnwindInfo - An entry in the exception table.
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struct UnwindInfo {
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uint8_t version:3,
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flags:5;
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uint8_t prologSize;
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uint8_t numCodes;
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uint8_t frameRegister:4,
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frameOffset:4;
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UnwindCode unwindCodes[1];
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void *getLanguageSpecificData() {
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return reinterpret_cast<void *>(&unwindCodes[(numCodes+1) & ~1]);
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}
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uint64_t getLanguageSpecificHandlerOffset() {
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return *reinterpret_cast<uint64_t *>(getLanguageSpecificData());
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}
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void setLanguageSpecificHandlerOffset(uint64_t offset) {
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*reinterpret_cast<uint64_t *>(getLanguageSpecificData()) = offset;
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}
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RuntimeFunction *getChainedFunctionEntry() {
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return reinterpret_cast<RuntimeFunction *>(getLanguageSpecificData());
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}
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void *getExceptionData() {
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return reinterpret_cast<void *>(reinterpret_cast<uint64_t *>(
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getLanguageSpecificData())+1);
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}
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};
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} // End of namespace Win64EH
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} // End of namespace llvm
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#endif
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