| /* |
| * NT exception handling routines |
| * |
| * Copyright 1999 Turchanov Sergey |
| * Copyright 1999 Alexandre Julliard |
| */ |
| |
| #include <signal.h> |
| #include "winnt.h" |
| #include "ntddk.h" |
| #include "process.h" |
| #include "global.h" |
| #include "wine/exception.h" |
| #include "stackframe.h" |
| #include "sig_context.h" |
| #include "miscemu.h" |
| #include "debugtools.h" |
| |
| DEFAULT_DEBUG_CHANNEL(seh) |
| |
| /* Exception record for handling exceptions happening inside exception handlers */ |
| typedef struct |
| { |
| EXCEPTION_FRAME frame; |
| EXCEPTION_FRAME *prevFrame; |
| } EXC_NESTED_FRAME; |
| |
| #ifdef __i386__ |
| # define GET_IP(context) ((LPVOID)EIP_reg(context)) |
| #else |
| # define GET_IP(context) ((LPVOID)0) |
| #endif /* __i386__ */ |
| |
| /* Default hook for built-in debugger */ |
| static DWORD default_hook( EXCEPTION_RECORD *rec, CONTEXT *ctx, BOOL first ) |
| { |
| if (!first) |
| { |
| DPRINTF( "stopping process due to unhandled exception %08lx.\n", |
| rec->ExceptionCode ); |
| raise( SIGSTOP ); |
| } |
| return 0; /* not handled */ |
| } |
| static DEBUGHOOK debug_hook = default_hook; |
| |
| /******************************************************************* |
| * EXC_SetDebugEventHook |
| * EXC_GetDebugEventHook |
| * |
| * Set/Get the hook for the built-in debugger. |
| * |
| * FIXME: the built-in debugger should use the normal debug events. |
| */ |
| void EXC_SetDebugEventHook( DEBUGHOOK hook ) |
| { |
| debug_hook = hook; |
| } |
| DEBUGHOOK EXC_GetDebugEventHook(void) |
| { |
| return debug_hook; |
| } |
| |
| /******************************************************************* |
| * EXC_RaiseHandler |
| * |
| * Handler for exceptions happening inside a handler. |
| */ |
| static DWORD CALLBACK EXC_RaiseHandler( EXCEPTION_RECORD *rec, EXCEPTION_FRAME *frame, |
| CONTEXT *context, EXCEPTION_FRAME **dispatcher ) |
| { |
| if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)) |
| return ExceptionContinueSearch; |
| /* We shouldn't get here so we store faulty frame in dispatcher */ |
| *dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame; |
| return ExceptionNestedException; |
| } |
| |
| |
| /******************************************************************* |
| * EXC_UnwindHandler |
| * |
| * Handler for exceptions happening inside an unwind handler. |
| */ |
| static DWORD CALLBACK EXC_UnwindHandler( EXCEPTION_RECORD *rec, EXCEPTION_FRAME *frame, |
| CONTEXT *context, EXCEPTION_FRAME **dispatcher ) |
| { |
| if (!(rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))) |
| return ExceptionContinueSearch; |
| /* We shouldn't get here so we store faulty frame in dispatcher */ |
| *dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame; |
| return ExceptionCollidedUnwind; |
| } |
| |
| |
| /******************************************************************* |
| * EXC_CallHandler |
| * |
| * Call an exception handler, setting up an exception frame to catch exceptions |
| * happening during the handler execution. |
| */ |
| static DWORD EXC_CallHandler( PEXCEPTION_HANDLER handler, PEXCEPTION_HANDLER nested_handler, |
| EXCEPTION_RECORD *record, EXCEPTION_FRAME *frame, |
| CONTEXT *context, EXCEPTION_FRAME **dispatcher ) |
| { |
| EXC_NESTED_FRAME newframe; |
| DWORD ret; |
| |
| newframe.frame.Handler = nested_handler; |
| newframe.prevFrame = frame; |
| EXC_push_frame( &newframe.frame ); |
| TRACE( "calling handler at %p code=%lx flags=%lx\n", |
| handler, record->ExceptionCode, record->ExceptionFlags ); |
| ret = handler( record, frame, context, dispatcher ); |
| TRACE( "handler returned %lx\n", ret ); |
| EXC_pop_frame( &newframe.frame ); |
| return ret; |
| } |
| |
| |
| /******************************************************************* |
| * EXC_DefaultHandling |
| * |
| * Default handling for exceptions. Called when we didn't find a suitable handler. |
| */ |
| static void EXC_DefaultHandling( EXCEPTION_RECORD *rec, CONTEXT *context ) |
| { |
| if ((PROCESS_Current()->flags & PDB32_DEBUGGED) && |
| (DEBUG_SendExceptionEvent( rec, FALSE ) == DBG_CONTINUE)) |
| return; /* continue execution */ |
| |
| if (debug_hook( rec, context, FALSE ) == DBG_CONTINUE) |
| return; /* continue execution */ |
| |
| if (rec->ExceptionFlags & EH_STACK_INVALID) |
| ERR("Exception frame is not in stack limits => unable to dispatch exception.\n"); |
| else if (rec->ExceptionCode == EXCEPTION_NONCONTINUABLE_EXCEPTION) |
| ERR("Process attempted to continue execution after noncontinuable exception.\n"); |
| else |
| ERR("Unhandled exception code %lx flags %lx addr %p\n", |
| rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress ); |
| TerminateProcess( GetCurrentProcess(), 1 ); |
| } |
| |
| |
| /*********************************************************************** |
| * RtlRaiseException (NTDLL.464) |
| */ |
| void WINAPI REGS_FUNC(RtlRaiseException)( EXCEPTION_RECORD *rec, CONTEXT *context ) |
| { |
| PEXCEPTION_FRAME frame, dispatch, nested_frame; |
| EXCEPTION_RECORD newrec; |
| DWORD res; |
| |
| TRACE( "code=%lx flags=%lx\n", rec->ExceptionCode, rec->ExceptionFlags ); |
| |
| if ((PROCESS_Current()->flags & PDB32_DEBUGGED) && |
| (DEBUG_SendExceptionEvent( rec, TRUE ) == DBG_CONTINUE)) |
| return; /* continue execution */ |
| |
| if (debug_hook( rec, context, TRUE ) == DBG_CONTINUE) |
| return; /* continue execution */ |
| |
| frame = NtCurrentTeb()->except; |
| nested_frame = NULL; |
| while (frame != (PEXCEPTION_FRAME)0xFFFFFFFF) |
| { |
| /* Check frame address */ |
| if (((void*)frame < NtCurrentTeb()->stack_low) || |
| ((void*)(frame+1) > NtCurrentTeb()->stack_top) || |
| (int)frame & 3) |
| { |
| rec->ExceptionFlags |= EH_STACK_INVALID; |
| break; |
| } |
| |
| /* Call handler */ |
| res = EXC_CallHandler( frame->Handler, EXC_RaiseHandler, rec, frame, context, &dispatch ); |
| if (frame == nested_frame) |
| { |
| /* no longer nested */ |
| nested_frame = NULL; |
| rec->ExceptionFlags &= ~EH_NESTED_CALL; |
| } |
| |
| switch(res) |
| { |
| case ExceptionContinueExecution: |
| if (!(rec->ExceptionFlags & EH_NONCONTINUABLE)) return; |
| newrec.ExceptionCode = STATUS_NONCONTINUABLE_EXCEPTION; |
| newrec.ExceptionFlags = EH_NONCONTINUABLE; |
| newrec.ExceptionRecord = rec; |
| newrec.NumberParameters = 0; |
| RtlRaiseException( &newrec ); /* never returns */ |
| break; |
| case ExceptionContinueSearch: |
| break; |
| case ExceptionNestedException: |
| if (nested_frame < dispatch) nested_frame = dispatch; |
| rec->ExceptionFlags |= EH_NESTED_CALL; |
| break; |
| default: |
| newrec.ExceptionCode = STATUS_INVALID_DISPOSITION; |
| newrec.ExceptionFlags = EH_NONCONTINUABLE; |
| newrec.ExceptionRecord = rec; |
| newrec.NumberParameters = 0; |
| RtlRaiseException( &newrec ); /* never returns */ |
| break; |
| } |
| frame = frame->Prev; |
| } |
| EXC_DefaultHandling( rec, context ); |
| } |
| |
| |
| /******************************************************************* |
| * RtlUnwind (KERNEL32.590) (NTDLL.518) |
| */ |
| void WINAPI REGS_FUNC(RtlUnwind)( PEXCEPTION_FRAME pEndFrame, LPVOID unusedEip, |
| PEXCEPTION_RECORD pRecord, DWORD returnEax, |
| CONTEXT *context ) |
| { |
| EXCEPTION_RECORD record, newrec; |
| PEXCEPTION_FRAME frame, dispatch; |
| |
| #ifdef __i386__ |
| EAX_reg(context) = returnEax; |
| #endif |
| |
| /* build an exception record, if we do not have one */ |
| if (!pRecord) |
| { |
| record.ExceptionCode = STATUS_UNWIND; |
| record.ExceptionFlags = 0; |
| record.ExceptionRecord = NULL; |
| record.ExceptionAddress = GET_IP(context); |
| record.NumberParameters = 0; |
| pRecord = &record; |
| } |
| |
| pRecord->ExceptionFlags |= EH_UNWINDING | (pEndFrame ? 0 : EH_EXIT_UNWIND); |
| |
| TRACE( "code=%lx flags=%lx\n", pRecord->ExceptionCode, pRecord->ExceptionFlags ); |
| |
| /* get chain of exception frames */ |
| frame = NtCurrentTeb()->except; |
| while ((frame != (PEXCEPTION_FRAME)0xffffffff) && (frame != pEndFrame)) |
| { |
| /* Check frame address */ |
| if (pEndFrame && (frame > pEndFrame)) |
| { |
| newrec.ExceptionCode = STATUS_INVALID_UNWIND_TARGET; |
| newrec.ExceptionFlags = EH_NONCONTINUABLE; |
| newrec.ExceptionRecord = pRecord; |
| newrec.NumberParameters = 0; |
| RtlRaiseException( &newrec ); /* never returns */ |
| } |
| if (((void*)frame < NtCurrentTeb()->stack_low) || |
| ((void*)(frame+1) > NtCurrentTeb()->stack_top) || |
| (int)frame & 3) |
| { |
| newrec.ExceptionCode = STATUS_BAD_STACK; |
| newrec.ExceptionFlags = EH_NONCONTINUABLE; |
| newrec.ExceptionRecord = pRecord; |
| newrec.NumberParameters = 0; |
| RtlRaiseException( &newrec ); /* never returns */ |
| } |
| |
| /* Call handler */ |
| switch(EXC_CallHandler( frame->Handler, EXC_UnwindHandler, pRecord, |
| frame, context, &dispatch )) |
| { |
| case ExceptionContinueSearch: |
| break; |
| case ExceptionCollidedUnwind: |
| frame = dispatch; |
| break; |
| default: |
| newrec.ExceptionCode = STATUS_INVALID_DISPOSITION; |
| newrec.ExceptionFlags = EH_NONCONTINUABLE; |
| newrec.ExceptionRecord = pRecord; |
| newrec.NumberParameters = 0; |
| RtlRaiseException( &newrec ); /* never returns */ |
| break; |
| } |
| frame = EXC_pop_frame( frame ); |
| } |
| } |
| |
| |
| /******************************************************************* |
| * NtRaiseException (NTDLL.175) |
| * |
| * Real prototype: |
| * DWORD WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *ctx, BOOL first ); |
| */ |
| void WINAPI REGS_FUNC(NtRaiseException)( EXCEPTION_RECORD *rec, CONTEXT *ctx, |
| BOOL first, CONTEXT *context ) |
| { |
| REGS_FUNC(RtlRaiseException)( rec, ctx ); |
| *context = *ctx; |
| } |
| |
| |
| /*********************************************************************** |
| * RtlRaiseStatus (NTDLL.465) |
| * |
| * Raise an exception with ExceptionCode = status |
| */ |
| void WINAPI RtlRaiseStatus( NTSTATUS status ) |
| { |
| EXCEPTION_RECORD ExceptionRec; |
| |
| ExceptionRec.ExceptionCode = status; |
| ExceptionRec.ExceptionFlags = EH_NONCONTINUABLE; |
| ExceptionRec.ExceptionRecord = NULL; |
| ExceptionRec.NumberParameters = 0; |
| RtlRaiseException( &ExceptionRec ); |
| } |
| |
| |
| /*********************************************************************** |
| * DebugBreak (KERNEL32.181) |
| */ |
| void WINAPI REGS_FUNC(DebugBreak)( CONTEXT *context ) |
| { |
| EXCEPTION_RECORD rec; |
| |
| rec.ExceptionCode = EXCEPTION_BREAKPOINT; |
| rec.ExceptionFlags = 0; |
| rec.ExceptionRecord = NULL; |
| rec.NumberParameters = 0; |
| REGS_FUNC(RtlRaiseException)( &rec, context ); |
| } |
| |
| |
| /*********************************************************************** |
| * DebugBreak16 (KERNEL.203) |
| */ |
| void WINAPI DebugBreak16( CONTEXT86 *context ) |
| { |
| #ifdef __i386__ |
| REGS_FUNC(DebugBreak)( context ); |
| #endif /* defined(__i386__) */ |
| } |
| |
| |
| /*********************************************************************** |
| * EXC_SaveContext |
| * |
| * Set the register values from a sigcontext. |
| */ |
| static void EXC_SaveContext( CONTEXT *context, const SIGCONTEXT *sigcontext ) |
| { |
| #ifdef __i386__ |
| EAX_reg(context) = EAX_sig(sigcontext); |
| EBX_reg(context) = EBX_sig(sigcontext); |
| ECX_reg(context) = ECX_sig(sigcontext); |
| EDX_reg(context) = EDX_sig(sigcontext); |
| ESI_reg(context) = ESI_sig(sigcontext); |
| EDI_reg(context) = EDI_sig(sigcontext); |
| EBP_reg(context) = EBP_sig(sigcontext); |
| EFL_reg(context) = EFL_sig(sigcontext); |
| EIP_reg(context) = EIP_sig(sigcontext); |
| ESP_reg(context) = ESP_sig(sigcontext); |
| CS_reg(context) = LOWORD(CS_sig(sigcontext)); |
| DS_reg(context) = LOWORD(DS_sig(sigcontext)); |
| ES_reg(context) = LOWORD(ES_sig(sigcontext)); |
| SS_reg(context) = LOWORD(SS_sig(sigcontext)); |
| #ifdef FS_sig |
| FS_reg(context) = LOWORD(FS_sig(sigcontext)); |
| #else |
| GET_FS( FS_reg(context) ); |
| FS_reg(context) &= 0xffff; |
| #endif |
| #ifdef GS_sig |
| GS_reg(context) = LOWORD(GS_sig(sigcontext)); |
| #else |
| GET_GS( GS_reg(context) ); |
| GS_reg(context) &= 0xffff; |
| #endif |
| if (ISV86(context)) V86BASE(context) = (DWORD)DOSMEM_MemoryBase(0); |
| #endif /* __i386__ */ |
| } |
| |
| |
| /*********************************************************************** |
| * EXC_RestoreContext |
| * |
| * Build a sigcontext from the register values. |
| */ |
| static void EXC_RestoreContext( const CONTEXT *context, SIGCONTEXT *sigcontext ) |
| { |
| #ifdef __i386__ |
| EAX_sig(sigcontext) = EAX_reg(context); |
| EBX_sig(sigcontext) = EBX_reg(context); |
| ECX_sig(sigcontext) = ECX_reg(context); |
| EDX_sig(sigcontext) = EDX_reg(context); |
| ESI_sig(sigcontext) = ESI_reg(context); |
| EDI_sig(sigcontext) = EDI_reg(context); |
| EBP_sig(sigcontext) = EBP_reg(context); |
| EFL_sig(sigcontext) = EFL_reg(context); |
| EIP_sig(sigcontext) = EIP_reg(context); |
| ESP_sig(sigcontext) = ESP_reg(context); |
| CS_sig(sigcontext) = CS_reg(context); |
| DS_sig(sigcontext) = DS_reg(context); |
| ES_sig(sigcontext) = ES_reg(context); |
| SS_sig(sigcontext) = SS_reg(context); |
| #ifdef FS_sig |
| FS_sig(sigcontext) = FS_reg(context); |
| #else |
| SET_FS( FS_reg(context) ); |
| #endif |
| #ifdef GS_sig |
| GS_sig(sigcontext) = GS_reg(context); |
| #else |
| SET_GS( GS_reg(context) ); |
| #endif |
| #endif /* __i386__ */ |
| } |
| |
| |
| /********************************************************************** |
| * EXC_segv |
| * |
| * Handler for SIGSEGV and related errors. |
| */ |
| static HANDLER_DEF(EXC_segv) |
| { |
| EXCEPTION_RECORD rec; |
| CONTEXT context; |
| |
| HANDLER_INIT(); |
| |
| #if defined(TRAP_sig) && defined(CR2_sig) |
| /* we want the page-fault case to be fast */ |
| if (TRAP_sig(HANDLER_CONTEXT) == 14) |
| if (VIRTUAL_HandleFault( (LPVOID)CR2_sig(HANDLER_CONTEXT) )) return; |
| #endif |
| |
| EXC_SaveContext( &context, HANDLER_CONTEXT ); |
| rec.ExceptionRecord = NULL; |
| rec.ExceptionFlags = 0; |
| rec.ExceptionAddress = GET_IP(&context); |
| rec.NumberParameters = 0; |
| |
| #ifdef TRAP_sig |
| switch(TRAP_sig(HANDLER_CONTEXT)) |
| { |
| case 4: /* Overflow exception */ |
| rec.ExceptionCode = EXCEPTION_INT_OVERFLOW; |
| break; |
| case 5: /* Bound range exception */ |
| rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED; |
| break; |
| case 6: /* Invalid opcode exception */ |
| rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; |
| break; |
| case 12: /* Stack fault */ |
| rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW; |
| break; |
| case 11: /* Segment not present exception */ |
| case 13: /* General protection fault */ |
| if (INSTR_EmulateInstruction( &context )) goto restore; |
| rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION; |
| break; |
| case 14: /* Page fault */ |
| #ifdef CR2_sig |
| rec.NumberParameters = 2; |
| #ifdef ERROR_sig |
| rec.ExceptionInformation[0] = (ERROR_sig(HANDLER_CONTEXT) & 2) != 0; |
| #else |
| rec.ExceptionInformation[0] = 0; |
| #endif /* ERROR_sig */ |
| rec.ExceptionInformation[1] = CR2_sig(HANDLER_CONTEXT); |
| #endif /* CR2_sig */ |
| rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION; |
| break; |
| case 17: /* Alignment check exception */ |
| /* FIXME: pass through exception handler first? */ |
| if (EFL_reg(&context) & 0x00040000) |
| { |
| /* Disable AC flag, return */ |
| EFL_reg(&context) &= ~0x00040000; |
| goto restore; |
| } |
| rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT; |
| break; |
| default: |
| ERR( "Got unexpected trap %ld\n", TRAP_sig(HANDLER_CONTEXT) ); |
| /* fall through */ |
| case 2: /* NMI interrupt */ |
| case 7: /* Device not available exception */ |
| case 8: /* Double fault exception */ |
| case 10: /* Invalid TSS exception */ |
| case 15: /* Unknown exception */ |
| case 18: /* Machine check exception */ |
| case 19: /* Cache flush exception */ |
| rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; |
| break; |
| } |
| #else /* TRAP_sig */ |
| # ifdef __i386__ |
| if (INSTR_EmulateInstruction( &context )) goto restore; |
| # endif |
| rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION; /* generic error */ |
| #endif /* TRAP_sig */ |
| |
| REGS_FUNC(RtlRaiseException)( &rec, &context ); |
| restore: |
| EXC_RestoreContext( &context, HANDLER_CONTEXT ); |
| } |
| |
| |
| /********************************************************************** |
| * EXC_trap |
| * |
| * Handler for SIGTRAP. |
| */ |
| static HANDLER_DEF(EXC_trap) |
| { |
| EXCEPTION_RECORD rec; |
| CONTEXT context; |
| |
| HANDLER_INIT(); |
| |
| #ifdef TRAP_sig |
| rec.ExceptionCode = (TRAP_sig(HANDLER_CONTEXT) == 1) ? |
| EXCEPTION_SINGLE_STEP : EXCEPTION_BREAKPOINT; |
| #else |
| rec.ExceptionCode = EXCEPTION_BREAKPOINT; |
| #endif /* TRAP_sig */ |
| |
| EXC_SaveContext( &context, HANDLER_CONTEXT ); |
| rec.ExceptionFlags = EXCEPTION_CONTINUABLE; |
| rec.ExceptionRecord = NULL; |
| rec.ExceptionAddress = GET_IP(&context); |
| rec.NumberParameters = 0; |
| REGS_FUNC(RtlRaiseException)( &rec, &context ); |
| EXC_RestoreContext( &context, HANDLER_CONTEXT ); |
| } |
| |
| |
| /*********************************************************************** |
| * EXC_SaveFPU |
| * |
| * Set the FPU context from a sigcontext. |
| */ |
| static void inline EXC_SaveFPU( CONTEXT *context, const SIGCONTEXT *sigcontext ) |
| { |
| #ifdef __i386__ |
| # ifdef FPU_sig |
| if (FPU_sig(sigcontext)) |
| { |
| context->FloatSave = *FPU_sig(sigcontext); |
| return; |
| } |
| # endif /* FPU_sig */ |
| # ifdef __GNUC__ |
| __asm__ __volatile__( "fnsave %0; fwait" : "=m" (context->FloatSave) ); |
| # endif /* __GNUC__ */ |
| #endif /* __i386__ */ |
| } |
| |
| |
| /*********************************************************************** |
| * EXC_RestoreFPU |
| * |
| * Restore the FPU context to a sigcontext. |
| */ |
| static void inline EXC_RestoreFPU( CONTEXT *context, const SIGCONTEXT *sigcontext ) |
| { |
| #ifdef __i386__ |
| # ifdef FPU_sig |
| if (FPU_sig(sigcontext)) |
| { |
| *FPU_sig(sigcontext) = context->FloatSave; |
| return; |
| } |
| # endif /* FPU_sig */ |
| # ifdef __GNUC__ |
| /* avoid nested exceptions */ |
| context->FloatSave.StatusWord &= context->FloatSave.ControlWord | 0xffffff80; |
| __asm__ __volatile__( "frstor %0; fwait" : : "m" (context->FloatSave) ); |
| # endif /* __GNUC__ */ |
| #endif /* __i386__ */ |
| } |
| |
| |
| /********************************************************************** |
| * EXC_GetFPUCode |
| * |
| * Get the FPU exception code from the FPU status. |
| */ |
| static inline DWORD EXC_GetFPUCode( const CONTEXT *context ) |
| { |
| #ifdef __i386__ |
| DWORD status = context->FloatSave.StatusWord; |
| |
| if (status & 0x01) /* IE */ |
| { |
| if (status & 0x40) /* SF */ |
| return EXCEPTION_FLT_STACK_CHECK; |
| else |
| return EXCEPTION_FLT_INVALID_OPERATION; |
| } |
| if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */ |
| if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */ |
| if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */ |
| if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */ |
| if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */ |
| #endif /* __i386__ */ |
| return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */ |
| } |
| |
| |
| /********************************************************************** |
| * EXC_fpe |
| * |
| * Handler for SIGFPE. |
| */ |
| static HANDLER_DEF(EXC_fpe) |
| { |
| EXCEPTION_RECORD rec; |
| CONTEXT context; |
| |
| HANDLER_INIT(); |
| |
| EXC_SaveFPU( &context, HANDLER_CONTEXT ); |
| |
| #ifdef TRAP_sig |
| switch(TRAP_sig(HANDLER_CONTEXT)) |
| { |
| case 0: /* Division by zero exception */ |
| rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO; |
| break; |
| case 9: /* Coprocessor segment overrun */ |
| rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION; |
| break; |
| case 16: /* Floating point exception */ |
| rec.ExceptionCode = EXC_GetFPUCode( &context ); |
| break; |
| default: |
| ERR( "Got unexpected trap %ld\n", TRAP_sig(HANDLER_CONTEXT) ); |
| rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION; |
| break; |
| } |
| #else /* TRAP_sig */ |
| rec.ExceptionCode = EXC_GetFPUCode( &context ); |
| #endif /* TRAP_sig */ |
| |
| EXC_SaveContext( &context, HANDLER_CONTEXT ); |
| rec.ExceptionFlags = 0; |
| rec.ExceptionRecord = NULL; |
| rec.ExceptionAddress = GET_IP(&context); |
| rec.NumberParameters = 0; |
| REGS_FUNC(RtlRaiseException)( &rec, &context ); |
| EXC_RestoreContext( &context, HANDLER_CONTEXT ); |
| EXC_RestoreFPU( &context, HANDLER_CONTEXT ); |
| } |
| |
| |
| /********************************************************************** |
| * EXC_int |
| * |
| * Handler for SIGINT. |
| */ |
| static HANDLER_DEF(EXC_int) |
| { |
| EXCEPTION_RECORD rec; |
| CONTEXT context; |
| |
| HANDLER_INIT(); |
| |
| EXC_SaveContext( &context, HANDLER_CONTEXT ); |
| rec.ExceptionCode = CONTROL_C_EXIT; |
| rec.ExceptionFlags = 0; |
| rec.ExceptionRecord = NULL; |
| rec.ExceptionAddress = GET_IP(&context); |
| rec.NumberParameters = 0; |
| REGS_FUNC(RtlRaiseException)( &rec, &context ); |
| EXC_RestoreContext( &context, HANDLER_CONTEXT ); |
| } |
| |
| |
| /********************************************************************** |
| * EXC_InitHandlers |
| * |
| * Initialize the signal handlers for exception handling. |
| */ |
| void EXC_InitHandlers(void) |
| { |
| SIGNAL_SetHandler( SIGINT, (void (*)())EXC_int ); |
| SIGNAL_SetHandler( SIGFPE, (void (*)())EXC_fpe ); |
| SIGNAL_SetHandler( SIGSEGV, (void (*)())EXC_segv ); |
| SIGNAL_SetHandler( SIGILL, (void (*)())EXC_segv ); |
| #ifdef SIGBUS |
| SIGNAL_SetHandler( SIGBUS, (void (*)())EXC_segv ); |
| #endif |
| #ifdef SIGTRAP |
| SIGNAL_SetHandler( SIGTRAP, (void (*)())EXC_trap ); |
| #endif |
| return; |
| } |