1 files changed, 163 insertions, 0 deletions
diff --git a/clang-r353983/include/llvm/Support/Win64EH.h b/clang-r353983/include/llvm/Support/Win64EH.h
new file mode 100644
index 00000000..bdd23b41
--- /dev/null
+++ b/clang-r353983/include/llvm/Support/Win64EH.h
@@ -0,0 +1,163 @@
+//===-- llvm/Support/Win64EH.h ---Win64 EH Constants-------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// 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
+
+#include "llvm/Support/DataTypes.h"
+#include "llvm/Support/Endian.h"
+
+namespace llvm {
+namespace Win64EH {
+
+/// 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 = 8,
+  UOP_SaveXMM128Big,
+  UOP_PushMachFrame,
+  // The following set of unwind opcodes is for ARM64.  They are documented at
+  // https://docs.microsoft.com/en-us/cpp/build/arm64-exception-handling
+  UOP_AllocMedium,
+  UOP_SaveFPLRX,
+  UOP_SaveFPLR,
+  UOP_SaveReg,
+  UOP_SaveRegX,
+  UOP_SaveRegP,
+  UOP_SaveRegPX,
+  UOP_SaveFReg,
+  UOP_SaveFRegX,
+  UOP_SaveFRegP,
+  UOP_SaveFRegPX,
+  UOP_SetFP,
+  UOP_AddFP,
+  UOP_Nop,
+  UOP_End
+};
+
+/// UnwindCode - This union describes a single operation in a function prolog,
+/// or part thereof.
+union UnwindCode {
+  struct {
+    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_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
+};
+
+/// 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 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
+
+  /// Return pointer to language specific data part of UnwindInfo.
+  void *getLanguageSpecificData() {
+    return reinterpret_cast<void *>(&UnwindCodes[(NumCodes+1) & ~1]);
+  }
+
+  /// Return pointer to language specific data part of UnwindInfo.
+  const void *getLanguageSpecificData() const {
+    return reinterpret_cast<const void *>(&UnwindCodes[(NumCodes + 1) & ~1]);
+  }
+
+  /// Return image-relative offset of language-specific exception handler.
+  uint32_t getLanguageSpecificHandlerOffset() const {
+    return *reinterpret_cast<const support::ulittle32_t *>(
+               getLanguageSpecificData());
+  }
+
+  /// Set image-relative offset of language-specific exception handler.
+  void setLanguageSpecificHandlerOffset(uint32_t offset) {
+    *reinterpret_cast<support::ulittle32_t *>(getLanguageSpecificData()) =
+        offset;
+  }
+
+  /// Return pointer to exception-specific data.
+  void *getExceptionData() {
+    return reinterpret_cast<void *>(reinterpret_cast<uint32_t *>(
+                                                  getLanguageSpecificData())+1);
+  }
+
+  /// Return pointer to chained unwind info.
+  RuntimeFunction *getChainedFunctionEntry() {
+    return reinterpret_cast<RuntimeFunction *>(getLanguageSpecificData());
+  }
+
+  /// Return pointer to chained unwind info.
+  const RuntimeFunction *getChainedFunctionEntry() const {
+    return reinterpret_cast<const RuntimeFunction *>(getLanguageSpecificData());
+  }
+};
+
+
+} // End of namespace Win64EH
+} // End of namespace llvm
+
+#endif