| //===----------------------------------------------------------------------===// | |
| // | |
| // 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 | |
| // | |
| // | |
| // C++ ABI Level 1 ABI documented at: | |
| // https://itanium-cxx-abi.github.io/cxx-abi/abi-eh.html | |
| // | |
| //===----------------------------------------------------------------------===// | |
| #ifndef __ITANIUM_UNWIND_H__ | |
| #define __ITANIUM_UNWIND_H__ | |
| struct _Unwind_Context; // opaque | |
| struct _Unwind_Exception; // forward declaration | |
| typedef struct _Unwind_Exception _Unwind_Exception; | |
| typedef uint64_t _Unwind_Exception_Class; | |
| struct _Unwind_Exception { | |
| _Unwind_Exception_Class exception_class; | |
| void (*exception_cleanup)(_Unwind_Reason_Code reason, | |
| _Unwind_Exception *exc); | |
| #if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__) | |
| uintptr_t private_[6]; | |
| #else | |
| uintptr_t private_1; // non-zero means forced unwind | |
| uintptr_t private_2; // holds sp that phase1 found for phase2 to use | |
| #endif | |
| #if __SIZEOF_POINTER__ == 4 | |
| // The implementation of _Unwind_Exception uses an attribute mode on the | |
| // above fields which has the side effect of causing this whole struct to | |
| // round up to 32 bytes in size (48 with SEH). To be more explicit, we add | |
| // pad fields for binary compatibility. | |
| uint32_t reserved[3]; | |
| #endif | |
| // The Itanium ABI requires that _Unwind_Exception objects are "double-word | |
| // aligned". GCC has interpreted this to mean "use the maximum useful | |
| // alignment for the target"; so do we. | |
| } __attribute__((__aligned__)); | |
| typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)( | |
| int version, _Unwind_Action actions, uint64_t exceptionClass, | |
| _Unwind_Exception *exceptionObject, struct _Unwind_Context *context); | |
| #ifdef __cplusplus | |
| extern "C" { | |
| #endif | |
| // | |
| // The following are the base functions documented by the C++ ABI | |
| // | |
| #ifdef __USING_SJLJ_EXCEPTIONS__ | |
| extern _Unwind_Reason_Code | |
| _Unwind_SjLj_RaiseException(_Unwind_Exception *exception_object); | |
| extern void _Unwind_SjLj_Resume(_Unwind_Exception *exception_object); | |
| #else | |
| extern _Unwind_Reason_Code | |
| _Unwind_RaiseException(_Unwind_Exception *exception_object); | |
| extern void _Unwind_Resume(_Unwind_Exception *exception_object); | |
| #endif | |
| extern void _Unwind_DeleteException(_Unwind_Exception *exception_object); | |
| extern uintptr_t _Unwind_GetGR(struct _Unwind_Context *context, int index); | |
| extern void _Unwind_SetGR(struct _Unwind_Context *context, int index, | |
| uintptr_t new_value); | |
| extern uintptr_t _Unwind_GetIP(struct _Unwind_Context *context); | |
| extern void _Unwind_SetIP(struct _Unwind_Context *, uintptr_t new_value); | |
| #ifdef __cplusplus | |
| } | |
| #endif | |
| #endif // __ITANIUM_UNWIND_H__ |