X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FSupport%2FWin64EH.h;h=f6c492794875cccd07acef8886fd49782af7e17c;hb=8143b4da3f8df2506d768f2833a2888545489853;hp=54ed68c52f27ba15f49c0cee6b48a04e321e094e;hpb=c36849c4037a0a79945e9b03a4a31e81dbdfbece;p=oota-llvm.git

diff --git a/include/llvm/Support/Win64EH.h b/include/llvm/Support/Win64EH.h
index 54ed68c52f2..f6c49279487 100644
--- a/include/llvm/Support/Win64EH.h
+++ b/include/llvm/Support/Win64EH.h
@@ -16,11 +16,12 @@
 #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 {
@@ -30,7 +31,7 @@ enum UnwindOpcodes {
   UOP_SetFPReg,
   UOP_SaveNonVol,
   UOP_SaveNonVolBig,
-  UOP_SaveXMM128,
+  UOP_SaveXMM128 = 8,
   UOP_SaveXMM128Big,
   UOP_PushMachFrame
 };
@@ -39,11 +40,17 @@ enum UnwindOpcodes {
 /// 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 {
@@ -58,41 +65,81 @@ 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