[llvm-commits] [llvm] r131380 - /llvm/trunk/include/llvm/Support/Win64EH.h
Charles Davis
cdavis at mines.edu
Sun May 15 07:42:22 PDT 2011
Author: cdavis
Date: Sun May 15 09:42:22 2011
New Revision: 131380
URL: http://llvm.org/viewvc/llvm-project?rev=131380&view=rev
Log:
Add a header containing definitions used to implement Win64 exception handling.
Added:
llvm/trunk/include/llvm/Support/Win64EH.h
Added: llvm/trunk/include/llvm/Support/Win64EH.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Support/Win64EH.h?rev=131380&view=auto
==============================================================================
--- llvm/trunk/include/llvm/Support/Win64EH.h (added)
+++ llvm/trunk/include/llvm/Support/Win64EH.h Sun May 15 09:42:22 2011
@@ -0,0 +1,100 @@
+//===-- llvm/Support/Win64EH.h ---Win64 EH Constants-------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains constants and structures used for implementing
+// exception handling on Win64 platforms. For more information, see
+// http://msdn.microsoft.com/en-us/library/1eyas8tf.aspx
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_WIN64EH_H
+#define LLVM_SUPPORT_WIN64EH_H
+
+namespace llvm {
+namespace Win64EH {
+
+extern "C" {
+
+/// UnwindOpcodes - Enumeration whose values specify a single operation in
+/// the prolog of a function.
+enum UnwindOpcodes {
+ UOP_PushNonVol = 0,
+ UOP_AllocLarge,
+ UOP_AllocSmall,
+ UOP_SetFPReg,
+ UOP_SaveNonVol,
+ UOP_SaveNonVolBig,
+ UOP_SaveXMM128,
+ UOP_SaveXMM128Big,
+ UOP_PushMachFrame
+};
+
+/// UnwindCode - This union describes a single operation in a function prolog,
+/// or part thereof.
+union UnwindCode {
+ struct {
+ uint8_t codeOffset;
+ uint8_t unwindOp:4,
+ opInfo:4;
+ };
+ uint16_t frameOffset;
+};
+
+enum {
+ /// UNW_ExceptionHandler - Specifies that this function has an exception
+ /// handler.
+ UNW_ExceptionHandler = 0x01,
+ /// UNW_TerminateHandler - Specifies that this function has a termination
+ /// handler.
+ UNW_TerminateHandler = 0x02,
+ /// UNW_ChainInfo - Specifies that this UnwindInfo structure is chained to
+ /// another one.
+ UNW_ChainInfo = 0x04
+};
+
+/// 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];
+};
+
+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
+
+#endif
More information about the llvm-commits
mailing list