/* * msvcrt C++ exception handling * * Copyright 2011 Alexandre Julliard * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA */ #include "config.h" #include "wine/port.h" #ifdef __x86_64__ #include <stdarg.h> #include "ntstatus.h" #define WIN32_NO_STATUS #include "windef.h" #include "winbase.h" #include "winternl.h" #include "msvcrt.h" #include "wine/exception.h" #include "excpt.h" #include "wine/debug.h" #include "cppexcept.h" WINE_DEFAULT_DEBUG_CHANNEL(seh); typedef struct { int prev; UINT handler; } unwind_info; typedef struct { UINT flags; UINT type_info; int offset; UINT handler; UINT frame; } catchblock_info; #define TYPE_FLAG_CONST 1 #define TYPE_FLAG_VOLATILE 2 #define TYPE_FLAG_REFERENCE 8 typedef struct { int start_level; int end_level; int catch_level; int catchblock_count; UINT catchblock; } tryblock_info; typedef struct { int ip; int state; } ipmap_info; typedef struct __cxx_function_descr { UINT magic; UINT unwind_count; UINT unwind_table; UINT tryblock_count; UINT tryblock; UINT ipmap_count; UINT ipmap; UINT unwind_help; UINT expect_list; UINT flags; } cxx_function_descr; typedef struct { cxx_frame_info frame_info; BOOL rethrow; } cxx_catch_ctx; typedef struct { ULONG64 dest_frame; ULONG64 orig_frame; EXCEPTION_RECORD *seh_rec; DISPATCHER_CONTEXT *dispatch; const cxx_function_descr *descr; } se_translator_ctx; static inline void* rva_to_ptr(UINT rva, ULONG64 base) { return rva ? (void*)(base+rva) : NULL; } static inline void dump_type(UINT type_rva, ULONG64 base) { const cxx_type_info *type = rva_to_ptr(type_rva, base); TRACE("flags %x type %x %s offsets %d,%d,%d size %d copy ctor %x(%p)\n", type->flags, type->type_info, dbgstr_type_info(rva_to_ptr(type->type_info, base)), type->offsets.this_offset, type->offsets.vbase_descr, type->offsets.vbase_offset, type->size, type->copy_ctor, rva_to_ptr(type->copy_ctor, base)); } static void dump_exception_type(const cxx_exception_type *type, ULONG64 base) { const cxx_type_info_table *type_info_table = rva_to_ptr(type->type_info_table, base); UINT i; TRACE("flags %x destr %x(%p) handler %x(%p) type info %x(%p)\n", type->flags, type->destructor, rva_to_ptr(type->destructor, base), type->custom_handler, rva_to_ptr(type->custom_handler, base), type->type_info_table, type_info_table); for (i = 0; i < type_info_table->count; i++) { TRACE(" %d: ", i); dump_type(type_info_table->info[i], base); } } static void dump_function_descr(const cxx_function_descr *descr, ULONG64 image_base) { unwind_info *unwind_table = rva_to_ptr(descr->unwind_table, image_base); tryblock_info *tryblock = rva_to_ptr(descr->tryblock, image_base); ipmap_info *ipmap = rva_to_ptr(descr->ipmap, image_base); UINT i, j; TRACE("magic %x\n", descr->magic); TRACE("unwind table: %x(%p) %d\n", descr->unwind_table, unwind_table, descr->unwind_count); for (i=0; i<descr->unwind_count; i++) { TRACE(" %d: prev %d func %x(%p)\n", i, unwind_table[i].prev, unwind_table[i].handler, rva_to_ptr(unwind_table[i].handler, image_base)); } TRACE("try table: %x(%p) %d\n", descr->tryblock, tryblock, descr->tryblock_count); for (i=0; i<descr->tryblock_count; i++) { catchblock_info *catchblock = rva_to_ptr(tryblock[i].catchblock, image_base); TRACE(" %d: start %d end %d catchlevel %d catch %x(%p) %d\n", i, tryblock[i].start_level, tryblock[i].end_level, tryblock[i].catch_level, tryblock[i].catchblock, catchblock, tryblock[i].catchblock_count); for (j=0; j<tryblock[i].catchblock_count; j++) { TRACE(" %d: flags %x offset %d handler %x(%p) frame %x type %x %s\n", j, catchblock[j].flags, catchblock[j].offset, catchblock[j].handler, rva_to_ptr(catchblock[j].handler, image_base), catchblock[j].frame, catchblock[j].type_info, dbgstr_type_info(rva_to_ptr(catchblock[j].type_info, image_base))); } } TRACE("ipmap: %x(%p) %d\n", descr->ipmap, ipmap, descr->ipmap_count); for (i=0; i<descr->ipmap_count; i++) { TRACE(" %d: ip %x state %d\n", i, ipmap[i].ip, ipmap[i].state); } TRACE("unwind_help %d\n", descr->unwind_help); if (descr->magic <= CXX_FRAME_MAGIC_VC6) return; TRACE("expect list: %x\n", descr->expect_list); if (descr->magic <= CXX_FRAME_MAGIC_VC7) return; TRACE("flags: %08x\n", descr->flags); } static inline int ip_to_state(ipmap_info *ipmap, UINT count, int ip) { UINT low = 0, high = count-1, med; while (low < high) { med = low + (high-low)/2; if (ipmap[med].ip <= ip && ipmap[med+1].ip > ip) { low = med; break; } if (ipmap[med].ip < ip) low = med+1; else high = med-1; } TRACE("%x -> %d\n", ip, ipmap[low].state); return ipmap[low].state; } /* check if the exception type is caught by a given catch block, and return the type that matched */ static const cxx_type_info *find_caught_type(cxx_exception_type *exc_type, ULONG64 exc_base, const type_info *catch_ti, UINT catch_flags) { const cxx_type_info_table *type_info_table = rva_to_ptr(exc_type->type_info_table, exc_base); UINT i; for (i = 0; i < type_info_table->count; i++) { const cxx_type_info *type = rva_to_ptr(type_info_table->info[i], exc_base); const type_info *ti = rva_to_ptr(type->type_info, exc_base); if (!catch_ti) return type; /* catch(...) matches any type */ if (catch_ti != ti) { if (strcmp( catch_ti->mangled, ti->mangled )) continue; } /* type is the same, now check the flags */ if ((exc_type->flags & TYPE_FLAG_CONST) && !(catch_flags & TYPE_FLAG_CONST)) continue; if ((exc_type->flags & TYPE_FLAG_VOLATILE) && !(catch_flags & TYPE_FLAG_VOLATILE)) continue; return type; /* it matched */ } return NULL; } static inline void copy_exception(void *object, ULONG64 frame, DISPATCHER_CONTEXT *dispatch, const catchblock_info *catchblock, const cxx_type_info *type, ULONG64 exc_base) { const type_info *catch_ti = rva_to_ptr(catchblock->type_info, dispatch->ImageBase); void **dest = rva_to_ptr(catchblock->offset, frame); if (!catch_ti || !catch_ti->mangled[0]) return; if (!catchblock->offset) return; if (catchblock->flags & TYPE_FLAG_REFERENCE) { *dest = get_this_pointer(&type->offsets, object); } else if (type->flags & CLASS_IS_SIMPLE_TYPE) { memmove(dest, object, type->size); /* if it is a pointer, adjust it */ if (type->size == sizeof(void*)) *dest = get_this_pointer(&type->offsets, *dest); } else /* copy the object */ { if (type->copy_ctor) { if (type->flags & CLASS_HAS_VIRTUAL_BASE_CLASS) { void (__cdecl *copy_ctor)(void*, void*, int) = rva_to_ptr(type->copy_ctor, exc_base); copy_ctor(dest, get_this_pointer(&type->offsets, object), 1); } else { void (__cdecl *copy_ctor)(void*, void*) = rva_to_ptr(type->copy_ctor, exc_base); copy_ctor(dest, get_this_pointer(&type->offsets, object)); } } else memmove(dest, get_this_pointer(&type->offsets,object), type->size); } } static void cxx_local_unwind(ULONG64 frame, DISPATCHER_CONTEXT *dispatch, const cxx_function_descr *descr, int last_level) { const unwind_info *unwind_table = rva_to_ptr(descr->unwind_table, dispatch->ImageBase); void (__cdecl *handler)(ULONG64 unk, ULONG64 rbp); int *unwind_help = rva_to_ptr(descr->unwind_help, frame); int trylevel; if (unwind_help[0] == -2) { trylevel = ip_to_state(rva_to_ptr(descr->ipmap, dispatch->ImageBase), descr->ipmap_count, dispatch->ControlPc-dispatch->ImageBase); } else { trylevel = unwind_help[0]; } TRACE("current level: %d, last level: %d\n", trylevel, last_level); while (trylevel > last_level) { if (trylevel<0 || trylevel>=descr->unwind_count) { ERR("invalid trylevel %d\n", trylevel); MSVCRT_terminate(); } handler = rva_to_ptr(unwind_table[trylevel].handler, dispatch->ImageBase); if (handler) { TRACE("handler: %p\n", handler); handler(0, frame); } trylevel = unwind_table[trylevel].prev; } unwind_help[0] = trylevel; } static LONG CALLBACK cxx_rethrow_filter(PEXCEPTION_POINTERS eptrs, void *c) { EXCEPTION_RECORD *rec = eptrs->ExceptionRecord; thread_data_t *data = msvcrt_get_thread_data(); cxx_catch_ctx *ctx = c; if (rec->ExceptionCode != CXX_EXCEPTION) return EXCEPTION_CONTINUE_SEARCH; if (!rec->ExceptionInformation[1] && !rec->ExceptionInformation[2]) return EXCEPTION_EXECUTE_HANDLER; if (rec->ExceptionInformation[1] == data->exc_record->ExceptionInformation[1]) ctx->rethrow = TRUE; return EXCEPTION_CONTINUE_SEARCH; } static void CALLBACK cxx_catch_cleanup(BOOL normal, void *c) { cxx_catch_ctx *ctx = c; __CxxUnregisterExceptionObject(&ctx->frame_info, ctx->rethrow); } static void* WINAPI call_catch_block(EXCEPTION_RECORD *rec) { ULONG64 frame = rec->ExceptionInformation[1]; const cxx_function_descr *descr = (void*)rec->ExceptionInformation[2]; EXCEPTION_RECORD *prev_rec = (void*)rec->ExceptionInformation[4]; EXCEPTION_RECORD *untrans_rec = (void*)rec->ExceptionInformation[6]; CONTEXT *context = (void*)rec->ExceptionInformation[7]; void* (__cdecl *handler)(ULONG64 unk, ULONG64 rbp) = (void*)rec->ExceptionInformation[5]; int *unwind_help = rva_to_ptr(descr->unwind_help, frame); EXCEPTION_POINTERS ep = { prev_rec, context }; cxx_catch_ctx ctx; void *ret_addr = NULL; TRACE("calling handler %p\n", handler); ctx.rethrow = FALSE; __CxxRegisterExceptionObject(&ep, &ctx.frame_info); msvcrt_get_thread_data()->processing_throw--; __TRY { __TRY { ret_addr = handler(0, frame); } __EXCEPT_CTX(cxx_rethrow_filter, &ctx) { TRACE("detect rethrow: exception code: %x\n", prev_rec->ExceptionCode); ctx.rethrow = TRUE; if (untrans_rec) { __DestructExceptionObject(prev_rec); RaiseException(untrans_rec->ExceptionCode, untrans_rec->ExceptionFlags, untrans_rec->NumberParameters, untrans_rec->ExceptionInformation); } else { RaiseException(prev_rec->ExceptionCode, prev_rec->ExceptionFlags, prev_rec->NumberParameters, prev_rec->ExceptionInformation); } } __ENDTRY } __FINALLY_CTX(cxx_catch_cleanup, &ctx) unwind_help[0] = -2; unwind_help[1] = -1; return ret_addr; } static inline BOOL cxx_is_consolidate(const EXCEPTION_RECORD *rec) { return rec->ExceptionCode==STATUS_UNWIND_CONSOLIDATE && rec->NumberParameters==8 && rec->ExceptionInformation[0]==(ULONG_PTR)call_catch_block; } static inline void find_catch_block(EXCEPTION_RECORD *rec, CONTEXT *context, EXCEPTION_RECORD *untrans_rec, ULONG64 frame, DISPATCHER_CONTEXT *dispatch, const cxx_function_descr *descr, cxx_exception_type *info, ULONG64 orig_frame) { ULONG64 exc_base = (rec->NumberParameters == 4 ? rec->ExceptionInformation[3] : 0); int trylevel = ip_to_state(rva_to_ptr(descr->ipmap, dispatch->ImageBase), descr->ipmap_count, dispatch->ControlPc-dispatch->ImageBase); thread_data_t *data = msvcrt_get_thread_data(); const tryblock_info *in_catch; EXCEPTION_RECORD catch_record; CONTEXT ctx; UINT i, j; INT *unwind_help; data->processing_throw++; for (i=descr->tryblock_count; i>0; i--) { in_catch = rva_to_ptr(descr->tryblock, dispatch->ImageBase); in_catch = &in_catch[i-1]; if (trylevel>in_catch->end_level && trylevel<=in_catch->catch_level) break; } if (!i) in_catch = NULL; unwind_help = rva_to_ptr(descr->unwind_help, orig_frame); if (trylevel > unwind_help[1]) unwind_help[0] = unwind_help[1] = trylevel; else trylevel = unwind_help[1]; TRACE("current trylevel: %d\n", trylevel); for (i=0; i<descr->tryblock_count; i++) { const tryblock_info *tryblock = rva_to_ptr(descr->tryblock, dispatch->ImageBase); tryblock = &tryblock[i]; if (trylevel < tryblock->start_level) continue; if (trylevel > tryblock->end_level) continue; if (in_catch) { if(tryblock->start_level <= in_catch->end_level) continue; if(tryblock->end_level > in_catch->catch_level) continue; } /* got a try block */ for (j=0; j<tryblock->catchblock_count; j++) { const catchblock_info *catchblock = rva_to_ptr(tryblock->catchblock, dispatch->ImageBase); catchblock = &catchblock[j]; if (info) { const cxx_type_info *type = find_caught_type(info, exc_base, rva_to_ptr(catchblock->type_info, dispatch->ImageBase), catchblock->flags); if (!type) continue; TRACE("matched type %p in tryblock %d catchblock %d\n", type, i, j); /* copy the exception to its destination on the stack */ copy_exception((void*)rec->ExceptionInformation[1], orig_frame, dispatch, catchblock, type, exc_base); } else { /* no CXX_EXCEPTION only proceed with a catch(...) block*/ if (catchblock->type_info) continue; TRACE("found catch(...) block\n"); } /* unwind stack and call catch */ memset(&catch_record, 0, sizeof(catch_record)); catch_record.ExceptionCode = STATUS_UNWIND_CONSOLIDATE; catch_record.ExceptionFlags = EXCEPTION_NONCONTINUABLE; catch_record.NumberParameters = 8; catch_record.ExceptionInformation[0] = (ULONG_PTR)call_catch_block; catch_record.ExceptionInformation[1] = orig_frame; catch_record.ExceptionInformation[2] = (ULONG_PTR)descr; catch_record.ExceptionInformation[3] = tryblock->start_level; catch_record.ExceptionInformation[4] = (ULONG_PTR)rec; catch_record.ExceptionInformation[5] = (ULONG_PTR)rva_to_ptr(catchblock->handler, dispatch->ImageBase); catch_record.ExceptionInformation[6] = (ULONG_PTR)untrans_rec; catch_record.ExceptionInformation[7] = (ULONG_PTR)context; RtlUnwindEx((void*)frame, (void*)dispatch->ControlPc, &catch_record, NULL, &ctx, NULL); } } TRACE("no matching catch block found\n"); data->processing_throw--; } static LONG CALLBACK se_translation_filter(EXCEPTION_POINTERS *ep, void *c) { se_translator_ctx *ctx = (se_translator_ctx *)c; EXCEPTION_RECORD *rec = ep->ExceptionRecord; cxx_exception_type *exc_type; if (rec->ExceptionCode != CXX_EXCEPTION) { TRACE("non-c++ exception thrown in SEH handler: %x\n", rec->ExceptionCode); MSVCRT_terminate(); } exc_type = (cxx_exception_type *)rec->ExceptionInformation[2]; find_catch_block(rec, ep->ContextRecord, ctx->seh_rec, ctx->dest_frame, ctx->dispatch, ctx->descr, exc_type, ctx->orig_frame); __DestructExceptionObject(rec); return ExceptionContinueSearch; } static DWORD cxx_frame_handler(EXCEPTION_RECORD *rec, ULONG64 frame, CONTEXT *context, DISPATCHER_CONTEXT *dispatch, const cxx_function_descr *descr) { int trylevel = ip_to_state(rva_to_ptr(descr->ipmap, dispatch->ImageBase), descr->ipmap_count, dispatch->ControlPc-dispatch->ImageBase); cxx_exception_type *exc_type; ULONG64 orig_frame = frame; ULONG64 throw_base; DWORD throw_func_off; void *throw_func; UINT i, j; int unwindlevel = -1; if (descr->magic<CXX_FRAME_MAGIC_VC6 || descr->magic>CXX_FRAME_MAGIC_VC8) { FIXME("unhandled frame magic %x\n", descr->magic); return ExceptionContinueSearch; } if (descr->magic >= CXX_FRAME_MAGIC_VC8 && (descr->flags & FUNC_DESCR_SYNCHRONOUS) && (rec->ExceptionCode != CXX_EXCEPTION && !cxx_is_consolidate(rec) && rec->ExceptionCode != STATUS_LONGJUMP)) return ExceptionContinueSearch; /* handle only c++ exceptions */ /* update orig_frame if it's a nested exception */ throw_func_off = RtlLookupFunctionEntry(dispatch->ControlPc, &throw_base, NULL)->BeginAddress; throw_func = rva_to_ptr(throw_func_off, throw_base); TRACE("reconstructed handler pointer: %p\n", throw_func); for (i=descr->tryblock_count; i>0; i--) { const tryblock_info *tryblock = rva_to_ptr(descr->tryblock, dispatch->ImageBase); tryblock = &tryblock[i-1]; if (trylevel>tryblock->end_level && trylevel<=tryblock->catch_level) { for (j=0; j<tryblock->catchblock_count; j++) { const catchblock_info *catchblock = rva_to_ptr(tryblock->catchblock, dispatch->ImageBase); catchblock = &catchblock[j]; if (rva_to_ptr(catchblock->handler, dispatch->ImageBase) == throw_func) { TRACE("nested exception detected\n"); unwindlevel = tryblock->end_level; orig_frame = *(ULONG64*)rva_to_ptr(catchblock->frame, frame); TRACE("setting orig_frame to %lx\n", orig_frame); } } } } if (rec->ExceptionFlags & (EH_UNWINDING|EH_EXIT_UNWIND)) { if (rec->ExceptionFlags & EH_TARGET_UNWIND) cxx_local_unwind(orig_frame, dispatch, descr, cxx_is_consolidate(rec) ? rec->ExceptionInformation[3] : trylevel); else cxx_local_unwind(orig_frame, dispatch, descr, unwindlevel); return ExceptionContinueSearch; } if (!descr->tryblock_count) return ExceptionContinueSearch; if (rec->ExceptionCode == CXX_EXCEPTION) { exc_type = (cxx_exception_type *)rec->ExceptionInformation[2]; if (TRACE_ON(seh)) { TRACE("handling C++ exception rec %p frame %lx descr %p\n", rec, frame, descr); dump_exception_type(exc_type, rec->ExceptionInformation[3]); dump_function_descr(descr, dispatch->ImageBase); } } else { thread_data_t *data = msvcrt_get_thread_data(); exc_type = NULL; TRACE("handling C exception code %x rec %p frame %lx descr %p\n", rec->ExceptionCode, rec, frame, descr); if (data->se_translator) { EXCEPTION_POINTERS except_ptrs; se_translator_ctx ctx; ctx.dest_frame = frame; ctx.orig_frame = orig_frame; ctx.seh_rec = rec; ctx.dispatch = dispatch; ctx.descr = descr; __TRY { except_ptrs.ExceptionRecord = rec; except_ptrs.ContextRecord = context; data->se_translator(rec->ExceptionCode, &except_ptrs); } __EXCEPT_CTX(se_translation_filter, &ctx) { } __ENDTRY } } find_catch_block(rec, context, NULL, frame, dispatch, descr, exc_type, orig_frame); return ExceptionContinueSearch; } /********************************************************************* * __CxxExceptionFilter (MSVCRT.@) */ int CDECL __CxxExceptionFilter( PEXCEPTION_POINTERS ptrs, const type_info *ti, int flags, void **copy ) { FIXME( "%p %p %x %p: not implemented\n", ptrs, ti, flags, copy ); return EXCEPTION_CONTINUE_SEARCH; } /********************************************************************* * __CxxFrameHandler (MSVCRT.@) */ EXCEPTION_DISPOSITION CDECL __CxxFrameHandler( EXCEPTION_RECORD *rec, ULONG64 frame, CONTEXT *context, DISPATCHER_CONTEXT *dispatch ) { TRACE( "%p %lx %p %p\n", rec, frame, context, dispatch ); return cxx_frame_handler( rec, frame, context, dispatch, rva_to_ptr(*(UINT*)dispatch->HandlerData, dispatch->ImageBase) ); } /********************************************************************* * __CppXcptFilter (MSVCRT.@) */ int CDECL __CppXcptFilter(NTSTATUS ex, PEXCEPTION_POINTERS ptr) { /* only filter c++ exceptions */ if (ex != CXX_EXCEPTION) return EXCEPTION_CONTINUE_SEARCH; return _XcptFilter( ex, ptr ); } /********************************************************************* * __CxxDetectRethrow (MSVCRT.@) */ BOOL CDECL __CxxDetectRethrow(PEXCEPTION_POINTERS ptrs) { PEXCEPTION_RECORD rec; if (!ptrs) return FALSE; rec = ptrs->ExceptionRecord; if (rec->ExceptionCode == CXX_EXCEPTION && rec->NumberParameters == 4 && rec->ExceptionInformation[0] == CXX_FRAME_MAGIC_VC6 && rec->ExceptionInformation[2]) { ptrs->ExceptionRecord = msvcrt_get_thread_data()->exc_record; return TRUE; } return (msvcrt_get_thread_data()->exc_record == rec); } /********************************************************************* * __CxxQueryExceptionSize (MSVCRT.@) */ unsigned int CDECL __CxxQueryExceptionSize(void) { return sizeof(cxx_exception_type); } /******************************************************************* * _setjmp (MSVCRT.@) */ __ASM_GLOBAL_FUNC( MSVCRT__setjmp, "jmp " __ASM_NAME("__wine_setjmpex") ); /******************************************************************* * longjmp (MSVCRT.@) */ void __cdecl MSVCRT_longjmp( struct MSVCRT___JUMP_BUFFER *jmp, int retval ) { EXCEPTION_RECORD rec; if (!retval) retval = 1; if (jmp->Frame) { rec.ExceptionCode = STATUS_LONGJUMP; rec.ExceptionFlags = 0; rec.ExceptionRecord = NULL; rec.ExceptionAddress = NULL; rec.NumberParameters = 1; rec.ExceptionInformation[0] = (DWORD_PTR)jmp; RtlUnwind( (void *)jmp->Frame, (void *)jmp->Rip, &rec, IntToPtr(retval) ); } __wine_longjmp( (__wine_jmp_buf *)jmp, retval ); } /******************************************************************* * _local_unwind (MSVCRT.@) */ void __cdecl _local_unwind( void *frame, void *target ) { RtlUnwind( frame, target, NULL, 0 ); } /********************************************************************* * _fpieee_flt (MSVCRT.@) */ int __cdecl _fpieee_flt(ULONG exception_code, EXCEPTION_POINTERS *ep, int (__cdecl *handler)(_FPIEEE_RECORD*)) { FIXME("(%x %p %p) opcode: %s\n", exception_code, ep, handler, wine_dbgstr_longlong(*(ULONG64*)ep->ContextRecord->Rip)); return EXCEPTION_CONTINUE_SEARCH; } #if _MSVCR_VER>=110 && _MSVCR_VER<=120 /********************************************************************* * __crtCapturePreviousContext (MSVCR110.@) */ void __cdecl get_prev_context(CONTEXT *ctx, DWORD64 rip) { ULONG64 frame, image_base; RUNTIME_FUNCTION *rf; void *data; TRACE("(%p)\n", ctx); rf = RtlLookupFunctionEntry(ctx->Rip, &image_base, NULL); if(!rf) { FIXME("RtlLookupFunctionEntry failed\n"); return; } RtlVirtualUnwind(UNW_FLAG_NHANDLER, image_base, ctx->Rip, rf, ctx, &data, &frame, NULL); } __ASM_GLOBAL_FUNC( __crtCapturePreviousContext, "movq %rcx,8(%rsp)\n\t" "call " __ASM_NAME("RtlCaptureContext") "\n\t" "movq 8(%rsp),%rcx\n\t" /* context */ "leaq 8(%rsp),%rax\n\t" "movq %rax,0x98(%rcx)\n\t" /* context->Rsp */ "movq (%rsp),%rax\n\t" "movq %rax,0xf8(%rcx)\n\t" /* context->Rip */ "jmp " __ASM_NAME("get_prev_context") ) #endif #endif /* __x86_64__ */