#ifndef LLVM_SUPPORT_WIN64EH_H
#define LLVM_SUPPORT_WIN64EH_H
+#include "llvm/Support/DataTypes.h"
+#include "llvm/Support/Endian.h"
+
namespace llvm {
namespace Win64EH {
-extern "C" {
-
/// UnwindOpcodes - Enumeration whose values specify a single operation in
/// the prolog of a function.
enum UnwindOpcodes {
UOP_SetFPReg,
UOP_SaveNonVol,
UOP_SaveNonVolBig,
- UOP_SaveXMM128,
+ UOP_SaveXMM128 = 8,
UOP_SaveXMM128Big,
UOP_PushMachFrame
};
/// or part thereof.
union UnwindCode {
struct {
- uint8_t codeOffset;
- uint8_t unwindOp:4,
- opInfo:4;
- };
- uint16_t frameOffset;
+ uint8_t CodeOffset;
+ uint8_t UnwindOpAndOpInfo;
+ } u;
+ support::ulittle16_t FrameOffset;
+
+ uint8_t getUnwindOp() const {
+ return u.UnwindOpAndOpInfo & 0x0F;
+ }
+ uint8_t getOpInfo() const {
+ return (u.UnwindOpAndOpInfo >> 4) & 0x0F;
+ }
};
enum {
UNW_ChainInfo = 0x04
};
+/// RuntimeFunction - An entry in the table of functions with unwind info.
+struct RuntimeFunction {
+ 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];
+ uint8_t VersionAndFlags;
+ uint8_t PrologSize;
+ uint8_t NumCodes;
+ uint8_t FrameRegisterAndOffset;
+ UnwindCode UnwindCodes[1];
+
+ uint8_t getVersion() const {
+ return VersionAndFlags & 0x07;
+ }
+ uint8_t getFlags() const {
+ return (VersionAndFlags >> 3) & 0x1f;
+ }
+ uint8_t getFrameRegister() const {
+ return FrameRegisterAndOffset & 0x0f;
+ }
+ 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 pointer to language specific data part of UnwindInfo.
+ const void *getLanguageSpecificData() const {
+ return reinterpret_cast<const void *>(&UnwindCodes[(NumCodes + 1) & ~1]);
+ }
+
+ /// \brief Return image-relative offset of language-specific exception handler.
+ uint32_t getLanguageSpecificHandlerOffset() const {
+ return *reinterpret_cast<const support::ulittle32_t *>(
+ getLanguageSpecificData());
+ }
+
+ /// \brief Set image-relative offset of language-specific exception handler.
+ void setLanguageSpecificHandlerOffset(uint32_t offset) {
+ *reinterpret_cast<support::ulittle32_t *>(getLanguageSpecificData()) =
+ offset;
+ }
+
+ /// \brief Return pointer to exception-specific data.
+ void *getExceptionData() {
+ return reinterpret_cast<void *>(reinterpret_cast<uint32_t *>(
+ getLanguageSpecificData())+1);
+ }
+
+ /// \brief Return pointer to chained unwind info.
+ RuntimeFunction *getChainedFunctionEntry() {
+ return reinterpret_cast<RuntimeFunction *>(getLanguageSpecificData());
+ }
+
+ /// \brief Return pointer to chained unwind info.
+ const RuntimeFunction *getChainedFunctionEntry() const {
+ return reinterpret_cast<const RuntimeFunction *>(getLanguageSpecificData());
+ }
};
-inline UnwindCode &getUnwindCodeEntry(UnwindInfo &info, uint32_t index) {
- return info.unwindCodes[index];
-}
-inline void *getLanguageSpecificData(UnwindInfo &info) {
- return reinterpret_cast<void *>(&getUnwindCodeEntry(info,info.numCodes+1)&~1);
-}
-inline uint64_t getLanguageSpecificHandlerOffset(UnwindInfo &info) {
- return *reinterpret_cast<uint64_t *>(getLangaugeSpecificData(info));
-}
-inline void setLanguageSpecificHandlerOffset(UnwindInfo &info, uint64_t offset){
- *reinterpret_cast<uint64_t *>(getLanguageSpecificData(info)) = offset;
-}
-inline uint64_t getChainedFunctionEntryOffset(UnwindInfo &info) {
- return *reinterpret_cast<uint64_t *>(getLanguageSpecificData(info));
-}
-inline void setChainedFunctionEntryOffset(UnwindInfo &info, uint64_t offset) {
- *reinterpret_cast<uint64_t *>(getLanguageSpecificData(info)) = offset;
-}
-inline void *getExceptionData(UnwindInfo &info) {
- return reinterpret_cast<void *>(reinterpret_cast<uint64_t *>(
- getLanguageSpecificData(info))+1);
-}
-
-} // End of extern "C"
} // End of namespace Win64EH
} // End of namespace llvm