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717a142823
Change member types of RuntimeFunction and UnwindInfo from uint64_t to uint32_t: These members represent addresses. According to MSDN, they are image relative, that is, they are 32-bit offsets from the starting address of the image that contains the function table entry. See MSDN for more information: RUNTIME_FUNCTION: http://msdn.microsoft.com/en-us/library/ft9x1kdx.aspx UNWIND_INFO: http://msdn.microsoft.com/en-us/library/ddssxxy8.aspx Make Win64.h platform-neutral: The standard types unit8_t, uint16_t and uint32_t are replaced with their counterparts from Endian.h. Accessor functions are introduced to replace bit fields. Patch by João Matos and Kai Nacke. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169414 91177308-0d34-0410-b5e6-96231b3b80d8
136 lines
4.1 KiB
C++
136 lines
4.1 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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#include "llvm/Support/Endian.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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support::ulittle8_t CodeOffset;
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support::ulittle8_t UnwindOpAndOpInfo;
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} u;
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support::ulittle16_t FrameOffset;
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uint8_t getUnwindOp() const {
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return u.UnwindOpAndOpInfo & 0x0F;
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}
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uint8_t getOpInfo() const {
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return (u.UnwindOpAndOpInfo >> 4) & 0x0F;
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}
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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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support::ulittle32_t StartAddress;
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support::ulittle32_t EndAddress;
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support::ulittle32_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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support::ulittle8_t VersionAndFlags;
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support::ulittle8_t PrologSize;
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support::ulittle8_t NumCodes;
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support::ulittle8_t FrameRegisterAndOffset;
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UnwindCode UnwindCodes[1];
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uint8_t getVersion() const {
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return VersionAndFlags & 0x07;
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}
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uint8_t getFlags() const {
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return (VersionAndFlags >> 3) & 0x1f;
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}
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uint8_t getFrameRegister() const {
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return FrameRegisterAndOffset & 0x0f;
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}
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uint8_t getFrameOffset() const {
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return (FrameRegisterAndOffset >> 4) & 0x0f;
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}
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// The data after unwindCodes depends on flags.
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// If UNW_ExceptionHandler or UNW_TerminateHandler is set then follows
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// the address of the language-specific exception handler.
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// If UNW_ChainInfo is set then follows a RuntimeFunction which defines
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// the chained unwind info.
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// For more information please see MSDN at:
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// http://msdn.microsoft.com/en-us/library/ddssxxy8.aspx
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/// \brief Return pointer to language specific data part of UnwindInfo.
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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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/// \brief Return image-relativ offset of language-specific exception handler.
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uint32_t getLanguageSpecificHandlerOffset() {
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return *reinterpret_cast<uint32_t *>(getLanguageSpecificData());
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}
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/// \brief Set image-relativ offset of language-specific exception handler.
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void setLanguageSpecificHandlerOffset(uint32_t offset) {
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*reinterpret_cast<uint32_t *>(getLanguageSpecificData()) = offset;
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}
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/// \brief Return pointer to exception-specific data.
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void *getExceptionData() {
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return reinterpret_cast<void *>(reinterpret_cast<uint32_t *>(
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getLanguageSpecificData())+1);
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}
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/// \brief Return pointer to chained unwind info.
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RuntimeFunction *getChainedFunctionEntry() {
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return reinterpret_cast<RuntimeFunction *>(getLanguageSpecificData());
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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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