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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/contrib/llvm-project/libunwind/include/unwind_itanium.h
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//===----------------------------------------------------------------------===//

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//

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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

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// See https://llvm.org/LICENSE.txt for license information.

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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

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//

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//

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// C++ ABI Level 1 ABI documented at:

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//   https://itanium-cxx-abi.github.io/cxx-abi/abi-eh.html

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//

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//===----------------------------------------------------------------------===//

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#ifndef __ITANIUM_UNWIND_H__

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#define __ITANIUM_UNWIND_H__

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struct _Unwind_Context;   // opaque

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struct _Unwind_Exception; // forward declaration

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typedef struct _Unwind_Exception _Unwind_Exception;

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typedef uint64_t _Unwind_Exception_Class;

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struct _Unwind_Exception {

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  _Unwind_Exception_Class exception_class;

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  void (*exception_cleanup)(_Unwind_Reason_Code reason,

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                            _Unwind_Exception *exc);

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#if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__)

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  uintptr_t private_[6];

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#else

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  uintptr_t private_1; // non-zero means forced unwind

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  uintptr_t private_2; // holds sp that phase1 found for phase2 to use

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#endif

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#if __SIZEOF_POINTER__ == 4

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  // The implementation of _Unwind_Exception uses an attribute mode on the

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  // above fields which has the side effect of causing this whole struct to

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  // round up to 32 bytes in size (48 with SEH). To be more explicit, we add

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  // pad fields added for binary compatibility.

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  uint32_t reserved[3];

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#endif

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  // The Itanium ABI requires that _Unwind_Exception objects are "double-word

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  // aligned".  GCC has interpreted this to mean "use the maximum useful

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  // alignment for the target"; so do we.

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} __attribute__((__aligned__));

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typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)(

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    int version, _Unwind_Action actions, uint64_t exceptionClass,

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    _Unwind_Exception *exceptionObject, struct _Unwind_Context *context);

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#ifdef __cplusplus

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extern "C" {

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#endif

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//

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// The following are the base functions documented by the C++ ABI

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//

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#ifdef __USING_SJLJ_EXCEPTIONS__

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extern _Unwind_Reason_Code

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    _Unwind_SjLj_RaiseException(_Unwind_Exception *exception_object);

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extern void _Unwind_SjLj_Resume(_Unwind_Exception *exception_object);

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#else

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extern _Unwind_Reason_Code

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    _Unwind_RaiseException(_Unwind_Exception *exception_object);

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extern void _Unwind_Resume(_Unwind_Exception *exception_object);

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#endif

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extern void _Unwind_DeleteException(_Unwind_Exception *exception_object);

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extern uintptr_t _Unwind_GetGR(struct _Unwind_Context *context, int index);

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extern void _Unwind_SetGR(struct _Unwind_Context *context, int index,

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                          uintptr_t new_value);

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extern uintptr_t _Unwind_GetIP(struct _Unwind_Context *context);

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extern void _Unwind_SetIP(struct _Unwind_Context *, uintptr_t new_value);

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#ifdef __cplusplus

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}

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#endif

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#endif // __ITANIUM_UNWIND_H__

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