diff options
| -rw-r--r-- | include/llvm/Support/Win64EH.h | 81 |
1 files changed, 58 insertions, 23 deletions
diff --git a/include/llvm/Support/Win64EH.h b/include/llvm/Support/Win64EH.h index 8d74e10be0..164aca16bf 100644 --- a/include/llvm/Support/Win64EH.h +++ b/include/llvm/Support/Win64EH.h @@ -17,6 +17,7 @@ #define LLVM_SUPPORT_WIN64EH_H #include "llvm/Support/DataTypes.h" +#include "llvm/Support/Endian.h" namespace llvm { namespace Win64EH { @@ -39,11 +40,17 @@ enum UnwindOpcodes { /// or part thereof. union UnwindCode { struct { - uint8_t codeOffset; - uint8_t unwindOp:4, - opInfo:4; + support::ulittle8_t CodeOffset; + support::ulittle8_t UnwindOpAndOpInfo; } u; - uint16_t frameOffset; + support::ulittle16_t FrameOffset; + + uint8_t getUnwindOp() const { + return u.UnwindOpAndOpInfo & 0x0F; + } + uint8_t getOpInfo() const { + return (u.UnwindOpAndOpInfo >> 4) & 0x0F; + } }; enum { @@ -60,37 +67,65 @@ enum { /// RuntimeFunction - An entry in the table of functions with unwind info. struct RuntimeFunction { - uint64_t startAddress; - uint64_t endAddress; - uint64_t unwindInfoOffset; + support::ulittle32_t StartAddress; + support::ulittle32_t EndAddress; + support::ulittle32_t UnwindInfoOffset; }; /// UnwindInfo - An entry in the exception table. struct UnwindInfo { - uint8_t version:3, - flags:5; - uint8_t prologSize; - uint8_t numCodes; - uint8_t frameRegister:4, - frameOffset:4; - UnwindCode unwindCodes[1]; + support::ulittle8_t VersionAndFlags; + support::ulittle8_t PrologSize; + support::ulittle8_t NumCodes; + support::ulittle8_t FrameRegisterAndOffset; + UnwindCode UnwindCodes[1]; - void *getLanguageSpecificData() { - return reinterpret_cast<void *>(&unwindCodes[(numCodes+1) & ~1]); + uint8_t getVersion() const { + return VersionAndFlags & 0x07; } - uint64_t getLanguageSpecificHandlerOffset() { - return *reinterpret_cast<uint64_t *>(getLanguageSpecificData()); + uint8_t getFlags() const { + return (VersionAndFlags >> 3) & 0x1f; } - void setLanguageSpecificHandlerOffset(uint64_t offset) { - *reinterpret_cast<uint64_t *>(getLanguageSpecificData()) = offset; + uint8_t getFrameRegister() const { + return FrameRegisterAndOffset & 0x0f; } - RuntimeFunction *getChainedFunctionEntry() { - return reinterpret_cast<RuntimeFunction *>(getLanguageSpecificData()); + uint8_t getFrameOffset() const { + return (FrameRegisterAndOffset >> 4) & 0x0f; + } + + // The data after unwindCodes depends on flags. + // If UNW_ExceptionHandler or UNW_TerminateHandler is set then follows + // the address of the language-specific exception handler. + // If UNW_ChainInfo is set then follows a RuntimeFunction which defines + // the chained unwind info. + // For more information please see MSDN at: + // http://msdn.microsoft.com/en-us/library/ddssxxy8.aspx + + /// \brief Return pointer to language specific data part of UnwindInfo. + void *getLanguageSpecificData() { + return reinterpret_cast<void *>(&UnwindCodes[(NumCodes+1) & ~1]); } + + /// \brief Return image-relativ offset of language-specific exception handler. + uint32_t getLanguageSpecificHandlerOffset() { + return *reinterpret_cast<uint32_t *>(getLanguageSpecificData()); + } + + /// \brief Set image-relativ offset of language-specific exception handler. + void setLanguageSpecificHandlerOffset(uint32_t offset) { + *reinterpret_cast<uint32_t *>(getLanguageSpecificData()) = offset; + } + + /// \brief Return pointer to exception-specific data. void *getExceptionData() { - return reinterpret_cast<void *>(reinterpret_cast<uint64_t *>( + return reinterpret_cast<void *>(reinterpret_cast<uint32_t *>( getLanguageSpecificData())+1); } + + /// \brief Return pointer to chained unwind info. + RuntimeFunction *getChainedFunctionEntry() { + return reinterpret_cast<RuntimeFunction *>(getLanguageSpecificData()); + } }; |