1 /*
   2  * Copyright (c) 2020, Microsoft Corporation. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef OS_CPU_WINDOWS_AARCH64_UNWIND_WINDOWS_AARCH64_HPP
  26 #define OS_CPU_WINDOWS_AARCH64_UNWIND_WINDOWS_AARCH64_HPP
  27 
  28 
  29 typedef unsigned char UBYTE;
  30 
  31 #if _MSC_VER < 1700
  32 
  33 /* Not needed for VS2012 compiler, comes from winnt.h. */
  34 #define UNW_FLAG_EHANDLER  0x01
  35 #define UNW_FLAG_UHANDLER  0x02
  36 #define UNW_FLAG_CHAININFO 0x04
  37 
  38 #endif
  39 
  40 // See https://docs.microsoft.com/en-us/cpp/build/arm64-exception-handling#xdata-records
  41 typedef struct _UNWIND_INFO_EH_ONLY {
  42     DWORD FunctionLength : 18;
  43     DWORD Version        : 2;
  44     DWORD X              : 1; // = 1
  45     DWORD E              : 1; // = 1
  46     DWORD EpilogCount    : 5; // = 0
  47     DWORD CodeWords      : 5; // = 1
  48     DWORD UnwindCode0    : 8;
  49     DWORD UnwindCode1    : 8;
  50     DWORD UnwindCode2    : 8;
  51     DWORD UnwindCode3    : 8;
  52     DWORD ExceptionHandler;
  53 } UNWIND_INFO_EH_ONLY, *PUNWIND_INFO_EH_ONLY;
  54 
  55 /*
  56 typedef struct _RUNTIME_FUNCTION {
  57     DWORD BeginAddress;
  58     union {
  59         DWORD UnwindData;
  60         struct {
  61             DWORD Flag : 2;
  62             DWORD FunctionLength : 11;
  63             DWORD RegF : 3;
  64             DWORD RegI : 4;
  65             DWORD H : 1;
  66             DWORD CR : 2;
  67             DWORD FrameSize : 9;
  68         } DUMMYSTRUCTNAME;
  69     } DUMMYUNIONNAME;
  70 } RUNTIME_FUNCTION, *PRUNTIME_FUNCTION;
  71 */
  72 
  73 #if _MSC_VER < 1700
  74 
  75 /* Not needed for VS2012 compiler, comes from winnt.h. */
  76 typedef struct _DISPATCHER_CONTEXT {
  77     ULONG64 ControlPc;
  78     ULONG64 ImageBase;
  79     PRUNTIME_FUNCTION FunctionEntry;
  80     ULONG64 EstablisherFrame;
  81     ULONG64 TargetIp;
  82     PCONTEXT ContextRecord;
  83 //    PEXCEPTION_ROUTINE LanguageHandler;
  84     char * LanguageHandler; // double dependency problem
  85     PVOID HandlerData;
  86 } DISPATCHER_CONTEXT, *PDISPATCHER_CONTEXT;
  87 
  88 #endif
  89 
  90 #if _MSC_VER < 1500
  91 
  92 /* Not needed for VS2008 compiler, comes from winnt.h. */
  93 typedef EXCEPTION_DISPOSITION (*PEXCEPTION_ROUTINE) (
  94     IN PEXCEPTION_RECORD ExceptionRecord,
  95     IN ULONG64 EstablisherFrame,
  96     IN OUT PCONTEXT ContextRecord,
  97     IN OUT PDISPATCHER_CONTEXT DispatcherContext
  98 );
  99 
 100 #endif
 101 
 102 #endif // OS_CPU_WINDOWS_AARCH64_UNWIND_WINDOWS_AARCH64_HPP