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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | // |
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| 8 | // C++ ABI Level 1 ABI documented at: |
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| 9 | // https://itanium-cxx-abi.github.io/cxx-abi/abi-eh.html |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |||
| 13 | #ifndef __ITANIUM_UNWIND_H__ |
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| 14 | #define __ITANIUM_UNWIND_H__ |
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| 15 | |||
| 16 | struct _Unwind_Context; // opaque |
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| 17 | struct _Unwind_Exception; // forward declaration |
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| 18 | typedef struct _Unwind_Exception _Unwind_Exception; |
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| 19 | typedef uint64_t _Unwind_Exception_Class; |
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| 20 | |||
| 21 | struct _Unwind_Exception { |
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| 22 | _Unwind_Exception_Class exception_class; |
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| 23 | void (*exception_cleanup)(_Unwind_Reason_Code reason, |
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| 24 | _Unwind_Exception *exc); |
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| 25 | #if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__) |
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| 26 | uintptr_t private_[6]; |
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| 27 | #else |
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| 28 | uintptr_t private_1; // non-zero means forced unwind |
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| 29 | uintptr_t private_2; // holds sp that phase1 found for phase2 to use |
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| 30 | #endif |
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| 31 | #if __SIZEOF_POINTER__ == 4 |
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| 32 | // The implementation of _Unwind_Exception uses an attribute mode on the |
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| 33 | // above fields which has the side effect of causing this whole struct to |
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| 34 | // round up to 32 bytes in size (48 with SEH). To be more explicit, we add |
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| 35 | // pad fields added for binary compatibility. |
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| 36 | uint32_t reserved[3]; |
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| 37 | #endif |
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| 38 | // The Itanium ABI requires that _Unwind_Exception objects are "double-word |
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| 39 | // aligned". GCC has interpreted this to mean "use the maximum useful |
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| 40 | // alignment for the target"; so do we. |
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| 41 | } __attribute__((__aligned__)); |
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| 42 | |||
| 43 | typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)( |
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| 44 | int version, _Unwind_Action actions, uint64_t exceptionClass, |
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| 45 | _Unwind_Exception *exceptionObject, struct _Unwind_Context *context); |
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| 46 | |||
| 47 | #ifdef __cplusplus |
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| 48 | extern "C" { |
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| 49 | #endif |
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| 50 | |||
| 51 | // |
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| 52 | // The following are the base functions documented by the C++ ABI |
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| 53 | // |
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| 54 | #ifdef __USING_SJLJ_EXCEPTIONS__ |
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| 55 | extern _Unwind_Reason_Code |
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| 56 | _Unwind_SjLj_RaiseException(_Unwind_Exception *exception_object); |
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| 57 | extern void _Unwind_SjLj_Resume(_Unwind_Exception *exception_object); |
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| 58 | #else |
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| 59 | extern _Unwind_Reason_Code |
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| 60 | _Unwind_RaiseException(_Unwind_Exception *exception_object); |
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| 61 | extern void _Unwind_Resume(_Unwind_Exception *exception_object); |
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| 62 | #endif |
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| 63 | extern void _Unwind_DeleteException(_Unwind_Exception *exception_object); |
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| 64 | |||
| 65 | |||
| 66 | extern uintptr_t _Unwind_GetGR(struct _Unwind_Context *context, int index); |
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| 67 | extern void _Unwind_SetGR(struct _Unwind_Context *context, int index, |
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| 68 | uintptr_t new_value); |
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| 69 | extern uintptr_t _Unwind_GetIP(struct _Unwind_Context *context); |
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| 70 | extern void _Unwind_SetIP(struct _Unwind_Context *, uintptr_t new_value); |
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| 71 | |||
| 72 | #ifdef __cplusplus |
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| 73 | } |
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| 74 | #endif |
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| 75 | |||
| 76 | #endif // __ITANIUM_UNWIND_H__ |