/*===---- unwind.h - Stack unwinding ----------------------------------------=== * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * *===-----------------------------------------------------------------------=== */ /* See "Data Definitions for libgcc_s" in the Linux Standard Base.*/ #ifndef __CLANG_UNWIND_H #define __CLANG_UNWIND_H #if defined(__APPLE__) && __has_include_next(<unwind.h>) /* Darwin (from 11.x on) provide an unwind.h. If that's available, * use it. libunwind wraps some of its definitions in #ifdef _GNU_SOURCE, * so define that around the include.*/ # ifndef _GNU_SOURCE # define _SHOULD_UNDEFINE_GNU_SOURCE # define _GNU_SOURCE # endif // libunwind's unwind.h reflects the current visibility. However, Mozilla // builds with -fvisibility=hidden and relies on gcc's unwind.h to reset the // visibility to default and export its contents. gcc also allows users to // override its override by #defining HIDE_EXPORTS (but note, this only obeys // the user's -fvisibility setting; it doesn't hide any exports on its own). We // imitate gcc's header here: # ifdef HIDE_EXPORTS # include_next <unwind.h> # else # pragma GCC visibility push(default) # include_next <unwind.h> # pragma GCC visibility pop # endif # ifdef _SHOULD_UNDEFINE_GNU_SOURCE # undef _GNU_SOURCE # undef _SHOULD_UNDEFINE_GNU_SOURCE # endif #else #include <stdint.h> #ifdef __cplusplus extern "C" { #endif /* It is a bit strange for a header to play with the visibility of the symbols it declares, but this matches gcc's behavior and some programs depend on it */ #ifndef HIDE_EXPORTS #pragma GCC visibility push(default) #endif typedef uintptr_t _Unwind_Word; typedef intptr_t _Unwind_Sword; typedef uintptr_t _Unwind_Ptr; typedef uintptr_t _Unwind_Internal_Ptr; typedef uint64_t _Unwind_Exception_Class; typedef intptr_t _sleb128_t; typedef uintptr_t _uleb128_t; struct _Unwind_Context; struct _Unwind_Exception; typedef enum { _URC_NO_REASON = 0, #if defined(__arm__) && !defined(__USING_SJLJ_EXCEPTIONS__) && \ !defined(__ARM_DWARF_EH__) _URC_OK = 0, /* used by ARM EHABI */ #endif _URC_FOREIGN_EXCEPTION_CAUGHT = 1, _URC_FATAL_PHASE2_ERROR = 2, _URC_FATAL_PHASE1_ERROR = 3, _URC_NORMAL_STOP = 4, _URC_END_OF_STACK = 5, _URC_HANDLER_FOUND = 6, _URC_INSTALL_CONTEXT = 7, _URC_CONTINUE_UNWIND = 8, #if defined(__arm__) && !defined(__USING_SJLJ_EXCEPTIONS__) && \ !defined(__ARM_DWARF_EH__) _URC_FAILURE = 9 /* used by ARM EHABI */ #endif } _Unwind_Reason_Code; typedef enum { _UA_SEARCH_PHASE = 1, _UA_CLEANUP_PHASE = 2, _UA_HANDLER_FRAME = 4, _UA_FORCE_UNWIND = 8, _UA_END_OF_STACK = 16 /* gcc extension to C++ ABI */ } _Unwind_Action; typedef void (*_Unwind_Exception_Cleanup_Fn)(_Unwind_Reason_Code, struct _Unwind_Exception *); struct _Unwind_Exception { _Unwind_Exception_Class exception_class; _Unwind_Exception_Cleanup_Fn exception_cleanup; _Unwind_Word private_1; _Unwind_Word private_2; /* 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_Stop_Fn)(int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *, struct _Unwind_Context *, void *); typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)( int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *, struct _Unwind_Context *); typedef _Unwind_Personality_Fn __personality_routine; typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn)(struct _Unwind_Context *, void *); #if defined(__arm__) && !defined(__APPLE__) typedef enum { _UVRSC_CORE = 0, /* integer register */ _UVRSC_VFP = 1, /* vfp */ _UVRSC_WMMXD = 3, /* Intel WMMX data register */ _UVRSC_WMMXC = 4 /* Intel WMMX control register */ } _Unwind_VRS_RegClass; typedef enum { _UVRSD_UINT32 = 0, _UVRSD_VFPX = 1, _UVRSD_UINT64 = 3, _UVRSD_FLOAT = 4, _UVRSD_DOUBLE = 5 } _Unwind_VRS_DataRepresentation; typedef enum { _UVRSR_OK = 0, _UVRSR_NOT_IMPLEMENTED = 1, _UVRSR_FAILED = 2 } _Unwind_VRS_Result; #if !defined(__USING_SJLJ_EXCEPTIONS__) && !defined(__ARM_DWARF_EH__) typedef uint32_t _Unwind_State; #define _US_VIRTUAL_UNWIND_FRAME ((_Unwind_State)0) #define _US_UNWIND_FRAME_STARTING ((_Unwind_State)1) #define _US_UNWIND_FRAME_RESUME ((_Unwind_State)2) #define _US_ACTION_MASK ((_Unwind_State)3) #define _US_FORCE_UNWIND ((_Unwind_State)8) #endif _Unwind_VRS_Result _Unwind_VRS_Get(struct _Unwind_Context *__context, _Unwind_VRS_RegClass __regclass, uint32_t __regno, _Unwind_VRS_DataRepresentation __representation, void *__valuep); _Unwind_VRS_Result _Unwind_VRS_Set(struct _Unwind_Context *__context, _Unwind_VRS_RegClass __regclass, uint32_t __regno, _Unwind_VRS_DataRepresentation __representation, void *__valuep); static __inline__ _Unwind_Word _Unwind_GetGR(struct _Unwind_Context *__context, int __index) { _Unwind_Word __value; _Unwind_VRS_Get(__context, _UVRSC_CORE, __index, _UVRSD_UINT32, &__value); return __value; } static __inline__ void _Unwind_SetGR(struct _Unwind_Context *__context, int __index, _Unwind_Word __value) { _Unwind_VRS_Set(__context, _UVRSC_CORE, __index, _UVRSD_UINT32, &__value); } static __inline__ _Unwind_Word _Unwind_GetIP(struct _Unwind_Context *__context) { _Unwind_Word __ip = _Unwind_GetGR(__context, 15); return __ip & ~(_Unwind_Word)(0x1); /* Remove thumb mode bit. */ } static __inline__ void _Unwind_SetIP(struct _Unwind_Context *__context, _Unwind_Word __value) { _Unwind_Word __thumb_mode_bit = _Unwind_GetGR(__context, 15) & 0x1; _Unwind_SetGR(__context, 15, __value | __thumb_mode_bit); } #else _Unwind_Word _Unwind_GetGR(struct _Unwind_Context *, int); void _Unwind_SetGR(struct _Unwind_Context *, int, _Unwind_Word); _Unwind_Word _Unwind_GetIP(struct _Unwind_Context *); void _Unwind_SetIP(struct _Unwind_Context *, _Unwind_Word); #endif _Unwind_Word _Unwind_GetIPInfo(struct _Unwind_Context *, int *); _Unwind_Word _Unwind_GetCFA(struct _Unwind_Context *); _Unwind_Word _Unwind_GetBSP(struct _Unwind_Context *); void *_Unwind_GetLanguageSpecificData(struct _Unwind_Context *); _Unwind_Ptr _Unwind_GetRegionStart(struct _Unwind_Context *); /* DWARF EH functions; currently not available on Darwin/ARM */ #if !defined(__APPLE__) || !defined(__arm__) _Unwind_Reason_Code _Unwind_RaiseException(struct _Unwind_Exception *); _Unwind_Reason_Code _Unwind_ForcedUnwind(struct _Unwind_Exception *, _Unwind_Stop_Fn, void *); void _Unwind_DeleteException(struct _Unwind_Exception *); void _Unwind_Resume(struct _Unwind_Exception *); _Unwind_Reason_Code _Unwind_Resume_or_Rethrow(struct _Unwind_Exception *); #endif _Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn, void *); /* setjmp(3)/longjmp(3) stuff */ typedef struct SjLj_Function_Context *_Unwind_FunctionContext_t; void _Unwind_SjLj_Register(_Unwind_FunctionContext_t); void _Unwind_SjLj_Unregister(_Unwind_FunctionContext_t); _Unwind_Reason_Code _Unwind_SjLj_RaiseException(struct _Unwind_Exception *); _Unwind_Reason_Code _Unwind_SjLj_ForcedUnwind(struct _Unwind_Exception *, _Unwind_Stop_Fn, void *); void _Unwind_SjLj_Resume(struct _Unwind_Exception *); _Unwind_Reason_Code _Unwind_SjLj_Resume_or_Rethrow(struct _Unwind_Exception *); void *_Unwind_FindEnclosingFunction(void *); #ifdef __APPLE__ _Unwind_Ptr _Unwind_GetDataRelBase(struct _Unwind_Context *) __attribute__((__unavailable__)); _Unwind_Ptr _Unwind_GetTextRelBase(struct _Unwind_Context *) __attribute__((__unavailable__)); /* Darwin-specific functions */ void __register_frame(const void *); void __deregister_frame(const void *); struct dwarf_eh_bases { uintptr_t tbase; uintptr_t dbase; uintptr_t func; }; void *_Unwind_Find_FDE(const void *, struct dwarf_eh_bases *); void __register_frame_info_bases(const void *, void *, void *, void *) __attribute__((__unavailable__)); void __register_frame_info(const void *, void *) __attribute__((__unavailable__)); void __register_frame_info_table_bases(const void *, void*, void *, void *) __attribute__((__unavailable__)); void __register_frame_info_table(const void *, void *) __attribute__((__unavailable__)); void __register_frame_table(const void *) __attribute__((__unavailable__)); void __deregister_frame_info(const void *) __attribute__((__unavailable__)); void __deregister_frame_info_bases(const void *)__attribute__((__unavailable__)); #else _Unwind_Ptr _Unwind_GetDataRelBase(struct _Unwind_Context *); _Unwind_Ptr _Unwind_GetTextRelBase(struct _Unwind_Context *); #endif #ifndef HIDE_EXPORTS #pragma GCC visibility pop #endif #ifdef __cplusplus } #endif #endif #endif /* __CLANG_UNWIND_H */