1 // Copyright (C) 2012 The Android Open Source Project 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions 6 // are met: 7 // 1. Redistributions of source code must retain the above copyright 8 // notice, this list of conditions and the following disclaimer. 9 // 2. Redistributions in binary form must reproduce the above copyright 10 // notice, this list of conditions and the following disclaimer in the 11 // documentation and/or other materials provided with the distribution. 12 // 3. Neither the name of the project nor the names of its contributors 13 // may be used to endorse or promote products derived from this software 14 // without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 17 // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 // ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 20 // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 // OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 // OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 // SUCH DAMAGE. 27 28 #ifndef __GXXABI_HELPER_FUNC_INTERNAL_H 29 #define __GXXABI_HELPER_FUNC_INTERNAL_H 30 31 #include <cxxabi.h> 32 #include <exception> 33 #include <unwind.h> 34 #include "dwarf_helper.h" 35 36 // Target-independent helper functions 37 namespace __cxxabiv1 { 38 39 _GABIXX_NORETURN void call_terminate(_Unwind_Exception* unwind_exception) _GABIXX_HIDDEN; 40 41 #if __arm__ 42 uint32_t decodeRelocTarget2 (uint32_t ptr) _GABIXX_HIDDEN; 43 #endif 44 45 // An exception spec acts like a catch handler, but in reverse. 46 // If any catchType in the list can catch an excpType, 47 // then this exception spec does not catch the excpType. 48 bool canExceptionSpecCatch(int64_t specIndex, 49 const uint8_t* classInfo, 50 uint8_t ttypeEncoding, 51 const std::type_info* excpType, 52 void* adjustedPtr, 53 _Unwind_Exception* unwind_exception) 54 _GABIXX_HIDDEN; 55 56 void setRegisters(_Unwind_Exception* unwind_exception, 57 _Unwind_Context* context, 58 const ScanResultInternal& results) _GABIXX_HIDDEN; 59 60 _Unwind_Reason_Code continueUnwinding(_Unwind_Exception *ex, 61 _Unwind_Context *context) 62 _GABIXX_HIDDEN; 63 64 void saveDataToBarrierCache(_Unwind_Exception* exc, 65 _Unwind_Context* ctx, 66 const ScanResultInternal& results) 67 _GABIXX_HIDDEN; 68 69 void loadDataFromBarrierCache(_Unwind_Exception* exc, 70 ScanResultInternal& results) 71 _GABIXX_HIDDEN; 72 73 void prepareBeginCleanup(_Unwind_Exception* exc) _GABIXX_HIDDEN; 74 75 void saveUnexpectedDataToBarrierCache(_Unwind_Exception* exc, 76 _Unwind_Context* ctx, 77 const ScanResultInternal& results) 78 _GABIXX_HIDDEN; 79 80 void scanEHTable(ScanResultInternal& results, 81 _Unwind_Action actions, 82 bool native_exception, 83 _Unwind_Exception* unwind_exception, 84 _Unwind_Context* context) _GABIXX_HIDDEN; 85 86 // Make it easier to adapt to Itanium PR 87 #ifdef __arm__ 88 89 extern "C" 90 _Unwind_Reason_Code __gxx_personality_v0(_Unwind_State, 91 _Unwind_Exception*, 92 _Unwind_Context*) _GABIXX_DEFAULT; 93 94 # define BEGIN_DEFINE_PERSONALITY_FUNC \ 95 __gxx_personality_v0(_Unwind_State state, \ 96 _Unwind_Exception* unwind_exception, \ 97 _Unwind_Context* context) { \ 98 int version = 1; \ 99 uint64_t exceptionClass = unwind_exception->exception_class; \ 100 _Unwind_Action actions = 0; \ 101 switch (state) { \ 102 default: { \ 103 return _URC_FAILURE; \ 104 } \ 105 case _US_VIRTUAL_UNWIND_FRAME: { \ 106 actions = _UA_SEARCH_PHASE; \ 107 break; \ 108 } \ 109 case _US_UNWIND_FRAME_STARTING: { \ 110 actions = _UA_CLEANUP_PHASE; \ 111 if (unwind_exception->barrier_cache.sp == _Unwind_GetGR(context, UNWIND_STACK_REG)) { \ 112 actions |= _UA_HANDLER_FRAME; \ 113 } \ 114 break; \ 115 } \ 116 case _US_UNWIND_FRAME_RESUME: { \ 117 return continueUnwinding(unwind_exception, context); \ 118 break; \ 119 } \ 120 } \ 121 _Unwind_SetGR (context, UNWIND_POINTER_REG, reinterpret_cast<uint32_t>(unwind_exception)); 122 #else // ! __arm__ 123 124 extern "C" 125 _Unwind_Reason_Code __gxx_personality_v0(int, _Unwind_Action, uint64_t, 126 _Unwind_Exception*, 127 _Unwind_Context*) _GABIXX_DEFAULT; 128 129 # define BEGIN_DEFINE_PERSONALITY_FUNC \ 130 __gxx_personality_v0(int version, _Unwind_Action actions, uint64_t exceptionClass, \ 131 _Unwind_Exception* unwind_exception, _Unwind_Context* context) { 132 #endif 133 134 } // namespace __cxxabiv1 135 136 #endif // __GXXABI_HELPER_FUNC_INTERNAL_H 137
