2 * i386 signal handling routines
4 * Copyright 1999 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
24 #include "wine/port.h"
31 #include <sys/types.h>
36 #ifdef HAVE_SYS_PARAM_H
37 # include <sys/param.h>
42 # ifdef HAVE_SYS_SYSCALL_H
43 # include <sys/syscall.h>
47 #ifdef HAVE_SYS_VM86_H
48 # include <sys/vm86.h>
51 #ifdef HAVE_SYS_SIGNAL_H
52 # include <sys/signal.h>
54 #ifdef HAVE_SYS_SYSCTL_H
55 # include <sys/sysctl.h>
59 #define WIN32_NO_STATUS
61 #include "wine/library.h"
62 #include "ntdll_misc.h"
63 #include "wine/exception.h"
64 #include "wine/debug.h"
66 #ifdef HAVE_VALGRIND_MEMCHECK_H
67 #include <valgrind/memcheck.h>
70 #undef ERR /* Solaris needs to define this */
72 /* not defined for x86, so copy the x86_64 definition */
73 typedef struct DECLSPEC_ALIGN(16) _M128A
94 M128A FloatRegisters
[8];
95 M128A XmmRegisters
[16];
99 /***********************************************************************
100 * signal context platform-specific definitions
105 typedef ucontext_t SIGCONTEXT
;
107 #define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX])
108 #define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX])
109 #define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX])
110 #define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX])
111 #define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI])
112 #define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI])
113 #define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP])
114 #define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP])
116 #define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS])
117 #define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS])
118 #define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES])
119 #define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS])
120 #define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS])
121 #define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS])
123 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
124 #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
125 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
126 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
128 #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->uc_mcontext.fpregs))
129 #define FPUX_sig(context) (FPU_sig(context) && !((context)->uc_mcontext.fpregs->status >> 16) ? (XMM_SAVE_AREA32 *)(FPU_sig(context) + 1) : NULL)
131 #define VM86_EAX 0 /* the %eax value while vm86_enter is executing */
132 #define VIF_FLAG 0x00080000
133 #define VIP_FLAG 0x00100000
135 int vm86_enter( void **vm86_ptr
);
136 void vm86_return(void);
137 void vm86_return_end(void);
138 __ASM_GLOBAL_FUNC(vm86_enter
,
140 "movl %esp, %ebp\n\t"
141 "movl $166,%eax\n\t" /*SYS_vm86*/
142 "movl 8(%ebp),%ecx\n\t" /* vm86_ptr */
143 "movl (%ecx),%ecx\n\t"
145 "movl $1,%ebx\n\t" /*VM86_ENTER*/
146 "pushl %ecx\n\t" /* put vm86plus_struct ptr somewhere we can find it */
150 ".globl " __ASM_NAME("vm86_return") "\n\t"
151 __ASM_FUNC("vm86_return") "\n"
152 __ASM_NAME("vm86_return") ":\n\t"
158 "testl %eax,%eax\n\t"
160 "cmpb $0,%al\n\t" /* VM86_SIGNAL */
161 "je " __ASM_NAME("vm86_enter") "\n\t"
163 "movl 4(%esp),%ecx\n\t" /* vm86_ptr */
165 ".globl " __ASM_NAME("vm86_return_end") "\n\t"
166 __ASM_FUNC("vm86_return_end") "\n"
167 __ASM_NAME("vm86_return_end") ":\n\t"
170 #ifdef HAVE_SYS_VM86_H
178 #include <machine/frame.h>
179 typedef struct trapframe SIGCONTEXT
;
181 #define EAX_sig(context) ((context)->tf_eax)
182 #define EBX_sig(context) ((context)->tf_ebx)
183 #define ECX_sig(context) ((context)->tf_ecx)
184 #define EDX_sig(context) ((context)->tf_edx)
185 #define ESI_sig(context) ((context)->tf_esi)
186 #define EDI_sig(context) ((context)->tf_edi)
187 #define EBP_sig(context) ((context)->tf_ebp)
189 #define CS_sig(context) ((context)->tf_cs)
190 #define DS_sig(context) ((context)->tf_ds)
191 #define ES_sig(context) ((context)->tf_es)
192 #define SS_sig(context) ((context)->tf_ss)
194 #define EFL_sig(context) ((context)->tf_eflags)
196 #define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
197 #define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
199 #define FPU_sig(context) NULL /* FIXME */
200 #define FPUX_sig(context) NULL /* FIXME */
204 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
206 typedef struct sigcontext SIGCONTEXT
;
208 #define EAX_sig(context) ((context)->sc_eax)
209 #define EBX_sig(context) ((context)->sc_ebx)
210 #define ECX_sig(context) ((context)->sc_ecx)
211 #define EDX_sig(context) ((context)->sc_edx)
212 #define ESI_sig(context) ((context)->sc_esi)
213 #define EDI_sig(context) ((context)->sc_edi)
214 #define EBP_sig(context) ((context)->sc_ebp)
216 #define CS_sig(context) ((context)->sc_cs)
217 #define DS_sig(context) ((context)->sc_ds)
218 #define ES_sig(context) ((context)->sc_es)
219 #define FS_sig(context) ((context)->sc_fs)
220 #define GS_sig(context) ((context)->sc_gs)
221 #define SS_sig(context) ((context)->sc_ss)
223 #define TRAP_sig(context) ((context)->sc_trapno)
224 #define ERROR_sig(context) ((context)->sc_err)
225 #define EFL_sig(context) ((context)->sc_eflags)
227 #define EIP_sig(context) ((context)->sc_eip)
228 #define ESP_sig(context) ((context)->sc_esp)
230 #define FPU_sig(context) NULL /* FIXME */
231 #define FPUX_sig(context) NULL /* FIXME */
233 #endif /* __FreeBSD__ */
237 typedef struct sigcontext SIGCONTEXT
;
239 #define EAX_sig(context) ((context)->sc_eax)
240 #define EBX_sig(context) ((context)->sc_ebx)
241 #define ECX_sig(context) ((context)->sc_ecx)
242 #define EDX_sig(context) ((context)->sc_edx)
243 #define ESI_sig(context) ((context)->sc_esi)
244 #define EDI_sig(context) ((context)->sc_edi)
245 #define EBP_sig(context) ((context)->sc_ebp)
247 #define CS_sig(context) ((context)->sc_cs)
248 #define DS_sig(context) ((context)->sc_ds)
249 #define ES_sig(context) ((context)->sc_es)
250 #define FS_sig(context) ((context)->sc_fs)
251 #define GS_sig(context) ((context)->sc_gs)
252 #define SS_sig(context) ((context)->sc_ss)
254 #define TRAP_sig(context) ((context)->sc_trapno)
255 #define ERROR_sig(context) ((context)->sc_err)
256 #define EFL_sig(context) ((context)->sc_eflags)
258 #define EIP_sig(context) ((context)->sc_eip)
259 #define ESP_sig(context) ((context)->sc_esp)
261 #define FPU_sig(context) NULL /* FIXME */
262 #define FPUX_sig(context) NULL /* FIXME */
264 #define T_MCHK T_MACHK
265 #define T_XMMFLT T_XFTRAP
267 #endif /* __OpenBSD__ */
269 #if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
272 #include <sys/regset.h>
274 #include <sys/ucontext.h>
275 typedef struct ucontext SIGCONTEXT
;
281 #define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
282 #define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
283 #define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
284 #define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
285 #define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
286 #define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
287 #define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
289 #define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
290 #define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
291 #define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
292 #define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
294 #define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
295 #define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
297 #define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
299 #define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
301 #define ESP_sig(context) ((context)->uc_mcontext.gregs[UESP])
303 #define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
305 #define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
308 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[ERR])
311 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
314 #define FPU_sig(context) NULL /* FIXME */
315 #define FPUX_sig(context) NULL /* FIXME */
317 #endif /* svr4 || SCO_DS */
320 # include <sys/ucontext.h>
322 typedef ucontext_t SIGCONTEXT
;
324 /* work around silly renaming of struct members in OS X 10.5 */
325 #if __DARWIN_UNIX03 && defined(_STRUCT_X86_EXCEPTION_STATE32)
326 #define EAX_sig(context) ((context)->uc_mcontext->__ss.__eax)
327 #define EBX_sig(context) ((context)->uc_mcontext->__ss.__ebx)
328 #define ECX_sig(context) ((context)->uc_mcontext->__ss.__ecx)
329 #define EDX_sig(context) ((context)->uc_mcontext->__ss.__edx)
330 #define ESI_sig(context) ((context)->uc_mcontext->__ss.__esi)
331 #define EDI_sig(context) ((context)->uc_mcontext->__ss.__edi)
332 #define EBP_sig(context) ((context)->uc_mcontext->__ss.__ebp)
333 #define CS_sig(context) ((context)->uc_mcontext->__ss.__cs)
334 #define DS_sig(context) ((context)->uc_mcontext->__ss.__ds)
335 #define ES_sig(context) ((context)->uc_mcontext->__ss.__es)
336 #define FS_sig(context) ((context)->uc_mcontext->__ss.__fs)
337 #define GS_sig(context) ((context)->uc_mcontext->__ss.__gs)
338 #define SS_sig(context) ((context)->uc_mcontext->__ss.__ss)
339 #define EFL_sig(context) ((context)->uc_mcontext->__ss.__eflags)
340 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__eip))
341 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__esp))
342 #define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno)
343 #define ERROR_sig(context) ((context)->uc_mcontext->__es.__err)
344 #define FPU_sig(context) NULL
345 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->__fs.__fpu_fcw)
347 #define EAX_sig(context) ((context)->uc_mcontext->ss.eax)
348 #define EBX_sig(context) ((context)->uc_mcontext->ss.ebx)
349 #define ECX_sig(context) ((context)->uc_mcontext->ss.ecx)
350 #define EDX_sig(context) ((context)->uc_mcontext->ss.edx)
351 #define ESI_sig(context) ((context)->uc_mcontext->ss.esi)
352 #define EDI_sig(context) ((context)->uc_mcontext->ss.edi)
353 #define EBP_sig(context) ((context)->uc_mcontext->ss.ebp)
354 #define CS_sig(context) ((context)->uc_mcontext->ss.cs)
355 #define DS_sig(context) ((context)->uc_mcontext->ss.ds)
356 #define ES_sig(context) ((context)->uc_mcontext->ss.es)
357 #define FS_sig(context) ((context)->uc_mcontext->ss.fs)
358 #define GS_sig(context) ((context)->uc_mcontext->ss.gs)
359 #define SS_sig(context) ((context)->uc_mcontext->ss.ss)
360 #define EFL_sig(context) ((context)->uc_mcontext->ss.eflags)
361 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip))
362 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.esp))
363 #define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
364 #define ERROR_sig(context) ((context)->uc_mcontext->es.err)
365 #define FPU_sig(context) NULL
366 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->fs.fpu_fcw)
369 #endif /* __APPLE__ */
371 #if defined(__NetBSD__)
372 # include <sys/ucontext.h>
373 # include <sys/types.h>
376 typedef ucontext_t SIGCONTEXT
;
378 #define EAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EAX])
379 #define EBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBX])
380 #define ECX_sig(context) ((context)->uc_mcontext.__gregs[_REG_ECX])
381 #define EDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDX])
382 #define ESI_sig(context) ((context)->uc_mcontext.__gregs[_REG_ESI])
383 #define EDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDI])
384 #define EBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBP])
385 #define ESP_sig(context) _UC_MACHINE_SP(context)
387 #define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
388 #define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
389 #define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
390 #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
391 #define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
392 #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
394 #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_EFL])
395 #define EIP_sig(context) _UC_MACHINE_PC(context)
396 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
397 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
399 #define FPU_sig(context) NULL
400 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&((context)->uc_mcontext.__fpregs))
403 #define T_XMMFLT T_XMM
405 #endif /* __NetBSD__ */
407 WINE_DEFAULT_DEBUG_CHANNEL(seh
);
409 typedef int (*wine_signal_handler
)(unsigned int sig
);
411 static const size_t teb_size
= 4096; /* we reserve one page for the TEB */
412 static size_t signal_stack_mask
;
413 static size_t signal_stack_size
;
415 static wine_signal_handler handlers
[256];
417 static int fpux_support
; /* whether the CPU support extended fpu context */
419 extern void DECLSPEC_NORETURN
__wine_call_from_32_restore_regs( const CONTEXT
*context
);
423 TRAP_x86_UNKNOWN
= -1, /* Unknown fault (TRAP_sig not defined) */
424 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
425 TRAP_x86_DIVIDE
= T_DIVIDE
, /* Division by zero exception */
426 TRAP_x86_TRCTRAP
= T_TRCTRAP
, /* Single-step exception */
427 TRAP_x86_NMI
= T_NMI
, /* NMI interrupt */
428 TRAP_x86_BPTFLT
= T_BPTFLT
, /* Breakpoint exception */
429 TRAP_x86_OFLOW
= T_OFLOW
, /* Overflow exception */
430 TRAP_x86_BOUND
= T_BOUND
, /* Bound range exception */
431 TRAP_x86_PRIVINFLT
= T_PRIVINFLT
, /* Invalid opcode exception */
432 TRAP_x86_DNA
= T_DNA
, /* Device not available exception */
433 TRAP_x86_DOUBLEFLT
= T_DOUBLEFLT
, /* Double fault exception */
434 TRAP_x86_FPOPFLT
= T_FPOPFLT
, /* Coprocessor segment overrun */
435 TRAP_x86_TSSFLT
= T_TSSFLT
, /* Invalid TSS exception */
436 TRAP_x86_SEGNPFLT
= T_SEGNPFLT
, /* Segment not present exception */
437 TRAP_x86_STKFLT
= T_STKFLT
, /* Stack fault */
438 TRAP_x86_PROTFLT
= T_PROTFLT
, /* General protection fault */
439 TRAP_x86_PAGEFLT
= T_PAGEFLT
, /* Page fault */
440 TRAP_x86_ARITHTRAP
= T_ARITHTRAP
, /* Floating point exception */
441 TRAP_x86_ALIGNFLT
= T_ALIGNFLT
, /* Alignment check exception */
442 TRAP_x86_MCHK
= T_MCHK
, /* Machine check exception */
443 TRAP_x86_CACHEFLT
= T_XMMFLT
/* Cache flush exception */
445 TRAP_x86_DIVIDE
= 0, /* Division by zero exception */
446 TRAP_x86_TRCTRAP
= 1, /* Single-step exception */
447 TRAP_x86_NMI
= 2, /* NMI interrupt */
448 TRAP_x86_BPTFLT
= 3, /* Breakpoint exception */
449 TRAP_x86_OFLOW
= 4, /* Overflow exception */
450 TRAP_x86_BOUND
= 5, /* Bound range exception */
451 TRAP_x86_PRIVINFLT
= 6, /* Invalid opcode exception */
452 TRAP_x86_DNA
= 7, /* Device not available exception */
453 TRAP_x86_DOUBLEFLT
= 8, /* Double fault exception */
454 TRAP_x86_FPOPFLT
= 9, /* Coprocessor segment overrun */
455 TRAP_x86_TSSFLT
= 10, /* Invalid TSS exception */
456 TRAP_x86_SEGNPFLT
= 11, /* Segment not present exception */
457 TRAP_x86_STKFLT
= 12, /* Stack fault */
458 TRAP_x86_PROTFLT
= 13, /* General protection fault */
459 TRAP_x86_PAGEFLT
= 14, /* Page fault */
460 TRAP_x86_ARITHTRAP
= 16, /* Floating point exception */
461 TRAP_x86_ALIGNFLT
= 17, /* Alignment check exception */
462 TRAP_x86_MCHK
= 18, /* Machine check exception */
463 TRAP_x86_CACHEFLT
= 19 /* SIMD exception (via SIGFPE) if CPU is SSE capable
464 otherwise Cache flush exception (via SIGSEV) */
468 /* Exception record for handling exceptions happening inside exception handlers */
471 EXCEPTION_REGISTRATION_RECORD frame
;
472 EXCEPTION_REGISTRATION_RECORD
*prevFrame
;
475 extern DWORD
EXC_CallHandler( EXCEPTION_RECORD
*record
, EXCEPTION_REGISTRATION_RECORD
*frame
,
476 CONTEXT
*context
, EXCEPTION_REGISTRATION_RECORD
**dispatcher
,
477 PEXCEPTION_HANDLER handler
, PEXCEPTION_HANDLER nested_handler
);
479 /***********************************************************************
482 static inline int dispatch_signal(unsigned int sig
)
484 if (handlers
[sig
] == NULL
) return 0;
485 return handlers
[sig
](sig
);
489 /***********************************************************************
492 * Get the trap code for a signal.
494 static inline enum i386_trap_code
get_trap_code( const SIGCONTEXT
*sigcontext
)
497 return TRAP_sig(sigcontext
);
499 return TRAP_x86_UNKNOWN
; /* unknown trap code */
503 /***********************************************************************
506 * Get the error code for a signal.
508 static inline WORD
get_error_code( const SIGCONTEXT
*sigcontext
)
511 return ERROR_sig(sigcontext
);
517 /***********************************************************************
520 * Get the base of the signal stack for the current thread.
522 static inline void *get_signal_stack(void)
524 return (char *)NtCurrentTeb() + 4096;
528 /***********************************************************************
531 * Get the current teb based on the stack pointer.
533 static inline TEB
*get_current_teb(void)
536 __asm__("movl %%esp,%0" : "=g" (esp
) );
537 return (TEB
*)(esp
& ~signal_stack_mask
);
541 /*******************************************************************
544 * Handler for exceptions happening inside a handler.
546 static DWORD
raise_handler( EXCEPTION_RECORD
*rec
, EXCEPTION_REGISTRATION_RECORD
*frame
,
547 CONTEXT
*context
, EXCEPTION_REGISTRATION_RECORD
**dispatcher
)
549 if (rec
->ExceptionFlags
& (EH_UNWINDING
| EH_EXIT_UNWIND
))
550 return ExceptionContinueSearch
;
551 /* We shouldn't get here so we store faulty frame in dispatcher */
552 *dispatcher
= ((EXC_NESTED_FRAME
*)frame
)->prevFrame
;
553 return ExceptionNestedException
;
557 /*******************************************************************
560 * Handler for exceptions happening inside an unwind handler.
562 static DWORD
unwind_handler( EXCEPTION_RECORD
*rec
, EXCEPTION_REGISTRATION_RECORD
*frame
,
563 CONTEXT
*context
, EXCEPTION_REGISTRATION_RECORD
**dispatcher
)
565 if (!(rec
->ExceptionFlags
& (EH_UNWINDING
| EH_EXIT_UNWIND
)))
566 return ExceptionContinueSearch
;
567 /* We shouldn't get here so we store faulty frame in dispatcher */
568 *dispatcher
= ((EXC_NESTED_FRAME
*)frame
)->prevFrame
;
569 return ExceptionCollidedUnwind
;
573 /**********************************************************************
574 * call_stack_handlers
576 * Call the stack handlers chain.
578 static NTSTATUS
call_stack_handlers( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
580 EXCEPTION_REGISTRATION_RECORD
*frame
, *dispatch
, *nested_frame
;
583 frame
= NtCurrentTeb()->Tib
.ExceptionList
;
585 while (frame
!= (EXCEPTION_REGISTRATION_RECORD
*)~0UL)
587 /* Check frame address */
588 if (((void*)frame
< NtCurrentTeb()->Tib
.StackLimit
) ||
589 ((void*)(frame
+1) > NtCurrentTeb()->Tib
.StackBase
) ||
590 (ULONG_PTR
)frame
& 3)
592 rec
->ExceptionFlags
|= EH_STACK_INVALID
;
597 TRACE( "calling handler at %p code=%x flags=%x\n",
598 frame
->Handler
, rec
->ExceptionCode
, rec
->ExceptionFlags
);
599 res
= EXC_CallHandler( rec
, frame
, context
, &dispatch
, frame
->Handler
, raise_handler
);
600 TRACE( "handler at %p returned %x\n", frame
->Handler
, res
);
602 if (frame
== nested_frame
)
604 /* no longer nested */
606 rec
->ExceptionFlags
&= ~EH_NESTED_CALL
;
611 case ExceptionContinueExecution
:
612 if (!(rec
->ExceptionFlags
& EH_NONCONTINUABLE
)) return STATUS_SUCCESS
;
613 return STATUS_NONCONTINUABLE_EXCEPTION
;
614 case ExceptionContinueSearch
:
616 case ExceptionNestedException
:
617 if (nested_frame
< dispatch
) nested_frame
= dispatch
;
618 rec
->ExceptionFlags
|= EH_NESTED_CALL
;
621 return STATUS_INVALID_DISPOSITION
;
625 return STATUS_UNHANDLED_EXCEPTION
;
629 /*******************************************************************
632 * Implementation of NtRaiseException.
634 static NTSTATUS
raise_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
, BOOL first_chance
)
642 TRACE( "code=%x flags=%x addr=%p ip=%08x tid=%04x\n",
643 rec
->ExceptionCode
, rec
->ExceptionFlags
, rec
->ExceptionAddress
,
644 context
->Eip
, GetCurrentThreadId() );
645 for (c
= 0; c
< rec
->NumberParameters
; c
++)
646 TRACE( " info[%d]=%08lx\n", c
, rec
->ExceptionInformation
[c
] );
647 if (rec
->ExceptionCode
== EXCEPTION_WINE_STUB
)
649 if (rec
->ExceptionInformation
[1] >> 16)
650 MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
651 rec
->ExceptionAddress
,
652 (char*)rec
->ExceptionInformation
[0], (char*)rec
->ExceptionInformation
[1] );
654 MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
655 rec
->ExceptionAddress
,
656 (char*)rec
->ExceptionInformation
[0], rec
->ExceptionInformation
[1] );
660 TRACE(" eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n",
661 context
->Eax
, context
->Ebx
, context
->Ecx
,
662 context
->Edx
, context
->Esi
, context
->Edi
);
663 TRACE(" ebp=%08x esp=%08x cs=%04x ds=%04x es=%04x fs=%04x gs=%04x flags=%08x\n",
664 context
->Ebp
, context
->Esp
, context
->SegCs
, context
->SegDs
,
665 context
->SegEs
, context
->SegFs
, context
->SegGs
, context
->EFlags
);
667 status
= send_debug_event( rec
, TRUE
, context
);
668 if (status
== DBG_CONTINUE
|| status
== DBG_EXCEPTION_HANDLED
)
669 return STATUS_SUCCESS
;
671 /* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
672 if (rec
->ExceptionCode
== EXCEPTION_BREAKPOINT
) context
->Eip
--;
674 if (call_vectored_handlers( rec
, context
) == EXCEPTION_CONTINUE_EXECUTION
)
675 return STATUS_SUCCESS
;
677 if ((status
= call_stack_handlers( rec
, context
)) != STATUS_UNHANDLED_EXCEPTION
)
681 /* last chance exception */
683 status
= send_debug_event( rec
, FALSE
, context
);
684 if (status
!= DBG_CONTINUE
)
686 if (rec
->ExceptionFlags
& EH_STACK_INVALID
)
687 WINE_ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
688 else if (rec
->ExceptionCode
== STATUS_NONCONTINUABLE_EXCEPTION
)
689 WINE_ERR("Process attempted to continue execution after noncontinuable exception.\n");
691 WINE_ERR("Unhandled exception code %x flags %x addr %p\n",
692 rec
->ExceptionCode
, rec
->ExceptionFlags
, rec
->ExceptionAddress
);
693 NtTerminateProcess( NtCurrentProcess(), 1 );
695 return STATUS_SUCCESS
;
700 /***********************************************************************
703 * Set the register values from a vm86 structure.
705 static void save_vm86_context( CONTEXT
*context
, const struct vm86plus_struct
*vm86
)
707 context
->ContextFlags
= CONTEXT_FULL
;
708 context
->Eax
= vm86
->regs
.eax
;
709 context
->Ebx
= vm86
->regs
.ebx
;
710 context
->Ecx
= vm86
->regs
.ecx
;
711 context
->Edx
= vm86
->regs
.edx
;
712 context
->Esi
= vm86
->regs
.esi
;
713 context
->Edi
= vm86
->regs
.edi
;
714 context
->Esp
= vm86
->regs
.esp
;
715 context
->Ebp
= vm86
->regs
.ebp
;
716 context
->Eip
= vm86
->regs
.eip
;
717 context
->SegCs
= vm86
->regs
.cs
;
718 context
->SegDs
= vm86
->regs
.ds
;
719 context
->SegEs
= vm86
->regs
.es
;
720 context
->SegFs
= vm86
->regs
.fs
;
721 context
->SegGs
= vm86
->regs
.gs
;
722 context
->SegSs
= vm86
->regs
.ss
;
723 context
->EFlags
= vm86
->regs
.eflags
;
727 /***********************************************************************
728 * restore_vm86_context
730 * Build a vm86 structure from the register values.
732 static void restore_vm86_context( const CONTEXT
*context
, struct vm86plus_struct
*vm86
)
734 vm86
->regs
.eax
= context
->Eax
;
735 vm86
->regs
.ebx
= context
->Ebx
;
736 vm86
->regs
.ecx
= context
->Ecx
;
737 vm86
->regs
.edx
= context
->Edx
;
738 vm86
->regs
.esi
= context
->Esi
;
739 vm86
->regs
.edi
= context
->Edi
;
740 vm86
->regs
.esp
= context
->Esp
;
741 vm86
->regs
.ebp
= context
->Ebp
;
742 vm86
->regs
.eip
= context
->Eip
;
743 vm86
->regs
.cs
= context
->SegCs
;
744 vm86
->regs
.ds
= context
->SegDs
;
745 vm86
->regs
.es
= context
->SegEs
;
746 vm86
->regs
.fs
= context
->SegFs
;
747 vm86
->regs
.gs
= context
->SegGs
;
748 vm86
->regs
.ss
= context
->SegSs
;
749 vm86
->regs
.eflags
= context
->EFlags
;
753 /**********************************************************************
754 * merge_vm86_pending_flags
756 * Merges TEB.vm86_ptr and TEB.vm86_pending VIP flags and
757 * raises exception if there are pending events and VIF flag
758 * has been turned on.
760 * Called from __wine_enter_vm86 because vm86_enter
761 * doesn't check for pending events.
763 * Called from raise_vm86_sti_exception to check for
764 * pending events in a signal safe way.
766 static void merge_vm86_pending_flags( EXCEPTION_RECORD
*rec
)
768 BOOL check_pending
= TRUE
;
769 struct vm86plus_struct
*vm86
=
770 (struct vm86plus_struct
*)(ntdll_get_thread_data()->vm86_ptr
);
773 * In order to prevent a race when SIGUSR2 occurs while
774 * we are returning from exception handler, pending events
775 * will be rechecked after each raised exception.
777 while (check_pending
&& get_vm86_teb_info()->vm86_pending
)
779 check_pending
= FALSE
;
780 ntdll_get_thread_data()->vm86_ptr
= NULL
;
783 * If VIF is set, throw exception.
784 * Note that SIGUSR2 may turn VIF flag off so
785 * VIF check must occur only when TEB.vm86_ptr is NULL.
787 if (vm86
->regs
.eflags
& VIF_FLAG
)
790 save_vm86_context( &vcontext
, vm86
);
792 rec
->ExceptionCode
= EXCEPTION_VM86_STI
;
793 rec
->ExceptionFlags
= EXCEPTION_CONTINUABLE
;
794 rec
->ExceptionRecord
= NULL
;
795 rec
->NumberParameters
= 0;
796 rec
->ExceptionAddress
= (LPVOID
)vcontext
.Eip
;
798 vcontext
.EFlags
&= ~VIP_FLAG
;
799 get_vm86_teb_info()->vm86_pending
= 0;
800 raise_exception( rec
, &vcontext
, TRUE
);
802 restore_vm86_context( &vcontext
, vm86
);
803 check_pending
= TRUE
;
806 ntdll_get_thread_data()->vm86_ptr
= vm86
;
810 * Merge VIP flags in a signal safe way. This requires
811 * that the following operation compiles into atomic
814 vm86
->regs
.eflags
|= get_vm86_teb_info()->vm86_pending
;
816 #endif /* __HAVE_VM86 */
821 /* We have to workaround two Solaris breakages:
822 * - Solaris doesn't restore %ds and %es before calling the signal handler so exceptions in 16-bit
824 * - Solaris inserts a libc trampoline to call our handler, but the trampoline expects that registers
825 * are setup correctly. So we need to insert our own trampoline below the libc trampoline to set %gs.
828 extern int sigaction_syscall( int sig
, const struct sigaction
*new, struct sigaction
*old
);
829 __ASM_GLOBAL_FUNC( sigaction_syscall
,
830 "movl $0x62,%eax\n\t"
834 /* assume the same libc handler is used for all signals */
835 static void (*libc_sigacthandler
)( int signal
, siginfo_t
*siginfo
, void *context
);
837 static void wine_sigacthandler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
839 struct ntdll_thread_data
*thread_data
;
841 __asm__
__volatile__("mov %ss,%ax; mov %ax,%ds; mov %ax,%es");
843 thread_data
= (struct ntdll_thread_data
*)get_current_teb()->SystemReserved2
;
844 wine_set_fs( thread_data
->fs
);
845 wine_set_gs( thread_data
->gs
);
847 libc_sigacthandler( signal
, siginfo
, sigcontext
);
850 static int solaris_sigaction( int sig
, const struct sigaction
*new, struct sigaction
*old
)
852 struct sigaction real_act
;
854 if (sigaction( sig
, new, old
) == -1) return -1;
856 /* retrieve the real handler and flags with a direct syscall */
857 sigaction_syscall( sig
, NULL
, &real_act
);
858 libc_sigacthandler
= real_act
.sa_sigaction
;
859 real_act
.sa_sigaction
= wine_sigacthandler
;
860 sigaction_syscall( sig
, &real_act
, NULL
);
863 #define sigaction(sig,new,old) solaris_sigaction(sig,new,old)
867 typedef void (WINAPI
*raise_func
)( EXCEPTION_RECORD
*rec
, CONTEXT
*context
);
870 /***********************************************************************
873 * Handler initialization when the full context is not needed.
874 * Return the stack pointer to use for pushing the exception data.
876 static inline void *init_handler( const SIGCONTEXT
*sigcontext
, WORD
*fs
, WORD
*gs
)
878 TEB
*teb
= get_current_teb();
880 /* get %fs and %gs at time of the fault */
882 *fs
= LOWORD(FS_sig(sigcontext
));
887 *gs
= LOWORD(GS_sig(sigcontext
));
892 #ifndef __sun /* see above for Solaris handling */
894 struct ntdll_thread_data
*thread_data
= (struct ntdll_thread_data
*)teb
->SystemReserved2
;
895 wine_set_fs( thread_data
->fs
);
896 wine_set_gs( thread_data
->gs
);
900 if (!wine_ldt_is_system(CS_sig(sigcontext
)) ||
901 !wine_ldt_is_system(SS_sig(sigcontext
))) /* 16-bit mode */
904 * Win16 or DOS protected mode. Note that during switch
905 * from 16-bit mode to linear mode, CS may be set to system
906 * segment before FS is restored. Fortunately, in this case
907 * SS is still non-system segment. This is why both CS and SS
910 return teb
->WOW32Reserved
;
912 return (void *)(ESP_sig(sigcontext
) & ~3);
916 /***********************************************************************
919 * Save the thread FPU context.
921 static inline void save_fpu( CONTEXT
*context
)
924 context
->ContextFlags
|= CONTEXT_FLOATING_POINT
;
925 __asm__
__volatile__( "fnsave %0; fwait" : "=m" (context
->FloatSave
) );
930 /***********************************************************************
933 * Save the thread FPU extended context.
935 static inline void save_fpux( CONTEXT
*context
)
938 /* we have to enforce alignment by hand */
939 char buffer
[sizeof(XMM_SAVE_AREA32
) + 16];
940 XMM_SAVE_AREA32
*state
= (XMM_SAVE_AREA32
*)(((ULONG_PTR
)buffer
+ 15) & ~15);
942 __asm__
__volatile__( "fxsave %0" : "=m" (*state
) );
943 context
->ContextFlags
|= CONTEXT_EXTENDED_REGISTERS
;
944 memcpy( context
->ExtendedRegisters
, state
, sizeof(*state
) );
949 /***********************************************************************
952 * Restore the FPU context to a sigcontext.
954 static inline void restore_fpu( const CONTEXT
*context
)
956 FLOATING_SAVE_AREA float_status
= context
->FloatSave
;
957 /* reset the current interrupt status */
958 float_status
.StatusWord
&= float_status
.ControlWord
| 0xffffff80;
960 __asm__
__volatile__( "frstor %0; fwait" : : "m" (float_status
) );
961 #endif /* __GNUC__ */
965 /***********************************************************************
968 * Restore the FPU extended context to a sigcontext.
970 static inline void restore_fpux( const CONTEXT
*context
)
973 /* we have to enforce alignment by hand */
974 char buffer
[sizeof(XMM_SAVE_AREA32
) + 16];
975 XMM_SAVE_AREA32
*state
= (XMM_SAVE_AREA32
*)(((ULONG_PTR
)buffer
+ 15) & ~15);
977 memcpy( state
, context
->ExtendedRegisters
, sizeof(*state
) );
978 /* reset the current interrupt status */
979 state
->StatusWord
&= state
->ControlWord
| 0xff80;
980 __asm__
__volatile__( "fxrstor %0" : : "m" (*state
) );
985 /***********************************************************************
988 * Build a standard FPU context from an extended one.
990 static void fpux_to_fpu( FLOATING_SAVE_AREA
*fpu
, const XMM_SAVE_AREA32
*fpux
)
992 unsigned int i
, tag
, stack_top
;
994 fpu
->ControlWord
= fpux
->ControlWord
| 0xffff0000;
995 fpu
->StatusWord
= fpux
->StatusWord
| 0xffff0000;
996 fpu
->ErrorOffset
= fpux
->ErrorOffset
;
997 fpu
->ErrorSelector
= fpux
->ErrorSelector
| (fpux
->ErrorOpcode
<< 16);
998 fpu
->DataOffset
= fpux
->DataOffset
;
999 fpu
->DataSelector
= fpux
->DataSelector
;
1000 fpu
->Cr0NpxState
= fpux
->StatusWord
| 0xffff0000;
1002 stack_top
= (fpux
->StatusWord
>> 11) & 7;
1003 fpu
->TagWord
= 0xffff0000;
1004 for (i
= 0; i
< 8; i
++)
1006 memcpy( &fpu
->RegisterArea
[10 * i
], &fpux
->FloatRegisters
[i
], 10 );
1007 if (!(fpux
->TagWord
& (1 << i
))) tag
= 3; /* empty */
1010 const M128A
*reg
= &fpux
->FloatRegisters
[(i
- stack_top
) & 7];
1011 if ((reg
->High
& 0x7fff) == 0x7fff) /* exponent all ones */
1013 tag
= 2; /* special */
1015 else if (!(reg
->High
& 0x7fff)) /* exponent all zeroes */
1017 if (reg
->Low
) tag
= 2; /* special */
1018 else tag
= 1; /* zero */
1022 if (reg
->Low
>> 63) tag
= 0; /* valid */
1023 else tag
= 2; /* special */
1026 fpu
->TagWord
|= tag
<< (2 * i
);
1031 /***********************************************************************
1034 * Build a context structure from the signal info.
1036 static inline void save_context( CONTEXT
*context
, const SIGCONTEXT
*sigcontext
, WORD fs
, WORD gs
)
1038 struct ntdll_thread_regs
* const regs
= ntdll_get_thread_regs();
1039 FLOATING_SAVE_AREA
*fpu
= FPU_sig(sigcontext
);
1040 XMM_SAVE_AREA32
*fpux
= FPUX_sig(sigcontext
);
1042 memset(context
, 0, sizeof(*context
));
1043 context
->ContextFlags
= CONTEXT_FULL
| CONTEXT_DEBUG_REGISTERS
;
1044 context
->Eax
= EAX_sig(sigcontext
);
1045 context
->Ebx
= EBX_sig(sigcontext
);
1046 context
->Ecx
= ECX_sig(sigcontext
);
1047 context
->Edx
= EDX_sig(sigcontext
);
1048 context
->Esi
= ESI_sig(sigcontext
);
1049 context
->Edi
= EDI_sig(sigcontext
);
1050 context
->Ebp
= EBP_sig(sigcontext
);
1051 context
->EFlags
= EFL_sig(sigcontext
);
1052 context
->Eip
= EIP_sig(sigcontext
);
1053 context
->Esp
= ESP_sig(sigcontext
);
1054 context
->SegCs
= LOWORD(CS_sig(sigcontext
));
1055 context
->SegDs
= LOWORD(DS_sig(sigcontext
));
1056 context
->SegEs
= LOWORD(ES_sig(sigcontext
));
1057 context
->SegFs
= fs
;
1058 context
->SegGs
= gs
;
1059 context
->SegSs
= LOWORD(SS_sig(sigcontext
));
1060 context
->Dr0
= regs
->dr0
;
1061 context
->Dr1
= regs
->dr1
;
1062 context
->Dr2
= regs
->dr2
;
1063 context
->Dr3
= regs
->dr3
;
1064 context
->Dr6
= regs
->dr6
;
1065 context
->Dr7
= regs
->dr7
;
1069 context
->ContextFlags
|= CONTEXT_FLOATING_POINT
;
1070 context
->FloatSave
= *fpu
;
1074 context
->ContextFlags
|= CONTEXT_FLOATING_POINT
| CONTEXT_EXTENDED_REGISTERS
;
1075 memcpy( context
->ExtendedRegisters
, fpux
, sizeof(*fpux
) );
1077 if (!fpu
) fpux_to_fpu( &context
->FloatSave
, fpux
);
1079 if (!fpu
&& !fpux
) save_fpu( context
);
1083 /***********************************************************************
1086 * Restore the signal info from the context.
1088 static inline void restore_context( const CONTEXT
*context
, SIGCONTEXT
*sigcontext
)
1090 struct ntdll_thread_regs
* const regs
= ntdll_get_thread_regs();
1091 FLOATING_SAVE_AREA
*fpu
= FPU_sig(sigcontext
);
1092 XMM_SAVE_AREA32
*fpux
= FPUX_sig(sigcontext
);
1094 regs
->dr0
= context
->Dr0
;
1095 regs
->dr1
= context
->Dr1
;
1096 regs
->dr2
= context
->Dr2
;
1097 regs
->dr3
= context
->Dr3
;
1098 regs
->dr6
= context
->Dr6
;
1099 regs
->dr7
= context
->Dr7
;
1100 EAX_sig(sigcontext
) = context
->Eax
;
1101 EBX_sig(sigcontext
) = context
->Ebx
;
1102 ECX_sig(sigcontext
) = context
->Ecx
;
1103 EDX_sig(sigcontext
) = context
->Edx
;
1104 ESI_sig(sigcontext
) = context
->Esi
;
1105 EDI_sig(sigcontext
) = context
->Edi
;
1106 EBP_sig(sigcontext
) = context
->Ebp
;
1107 EFL_sig(sigcontext
) = context
->EFlags
;
1108 EIP_sig(sigcontext
) = context
->Eip
;
1109 ESP_sig(sigcontext
) = context
->Esp
;
1110 CS_sig(sigcontext
) = context
->SegCs
;
1111 DS_sig(sigcontext
) = context
->SegDs
;
1112 ES_sig(sigcontext
) = context
->SegEs
;
1113 SS_sig(sigcontext
) = context
->SegSs
;
1115 GS_sig(sigcontext
) = context
->SegGs
;
1117 wine_set_gs( context
->SegGs
);
1120 FS_sig(sigcontext
) = context
->SegFs
;
1122 wine_set_fs( context
->SegFs
);
1125 if (fpu
) *fpu
= context
->FloatSave
;
1126 if (fpux
) memcpy( fpux
, context
->ExtendedRegisters
, sizeof(*fpux
) );
1127 if (!fpu
&& !fpux
) restore_fpu( context
);
1131 /***********************************************************************
1132 * RtlCaptureContext (NTDLL.@)
1134 void WINAPI
__regs_RtlCaptureContext( CONTEXT
*context
, CONTEXT
*regs
)
1137 if (fpux_support
) save_fpux( context
);
1138 else save_fpu( context
);
1140 DEFINE_REGS_ENTRYPOINT( RtlCaptureContext
, 1 )
1143 /***********************************************************************
1146 * Set the new CPU context. Used by NtSetContextThread.
1148 void set_cpu_context( const CONTEXT
*context
)
1150 DWORD flags
= context
->ContextFlags
& ~CONTEXT_i386
;
1152 if ((flags
& CONTEXT_EXTENDED_REGISTERS
) && fpux_support
) restore_fpux( context
);
1153 else if (flags
& CONTEXT_FLOATING_POINT
) restore_fpu( context
);
1155 if (flags
& CONTEXT_DEBUG_REGISTERS
)
1157 struct ntdll_thread_regs
* const regs
= ntdll_get_thread_regs();
1158 regs
->dr0
= context
->Dr0
;
1159 regs
->dr1
= context
->Dr1
;
1160 regs
->dr2
= context
->Dr2
;
1161 regs
->dr3
= context
->Dr3
;
1162 regs
->dr6
= context
->Dr6
;
1163 regs
->dr7
= context
->Dr7
;
1165 if (flags
& CONTEXT_FULL
)
1167 if (!(flags
& CONTEXT_CONTROL
))
1168 FIXME( "setting partial context (%x) not supported\n", flags
);
1169 else if (flags
& CONTEXT_SEGMENTS
)
1170 __wine_call_from_32_restore_regs( context
);
1173 CONTEXT newcontext
= *context
;
1174 newcontext
.SegDs
= wine_get_ds();
1175 newcontext
.SegEs
= wine_get_es();
1176 newcontext
.SegFs
= wine_get_fs();
1177 newcontext
.SegGs
= wine_get_gs();
1178 __wine_call_from_32_restore_regs( &newcontext
);
1184 /***********************************************************************
1187 * Copy a register context according to the flags.
1189 void copy_context( CONTEXT
*to
, const CONTEXT
*from
, DWORD flags
)
1191 flags
&= ~CONTEXT_i386
; /* get rid of CPU id */
1192 if (flags
& CONTEXT_INTEGER
)
1194 to
->Eax
= from
->Eax
;
1195 to
->Ebx
= from
->Ebx
;
1196 to
->Ecx
= from
->Ecx
;
1197 to
->Edx
= from
->Edx
;
1198 to
->Esi
= from
->Esi
;
1199 to
->Edi
= from
->Edi
;
1201 if (flags
& CONTEXT_CONTROL
)
1203 to
->Ebp
= from
->Ebp
;
1204 to
->Esp
= from
->Esp
;
1205 to
->Eip
= from
->Eip
;
1206 to
->SegCs
= from
->SegCs
;
1207 to
->SegSs
= from
->SegSs
;
1208 to
->EFlags
= from
->EFlags
;
1210 if (flags
& CONTEXT_SEGMENTS
)
1212 to
->SegDs
= from
->SegDs
;
1213 to
->SegEs
= from
->SegEs
;
1214 to
->SegFs
= from
->SegFs
;
1215 to
->SegGs
= from
->SegGs
;
1217 if (flags
& CONTEXT_DEBUG_REGISTERS
)
1219 to
->Dr0
= from
->Dr0
;
1220 to
->Dr1
= from
->Dr1
;
1221 to
->Dr2
= from
->Dr2
;
1222 to
->Dr3
= from
->Dr3
;
1223 to
->Dr6
= from
->Dr6
;
1224 to
->Dr7
= from
->Dr7
;
1226 if (flags
& CONTEXT_FLOATING_POINT
)
1228 to
->FloatSave
= from
->FloatSave
;
1230 if (flags
& CONTEXT_EXTENDED_REGISTERS
)
1232 memcpy( to
->ExtendedRegisters
, from
->ExtendedRegisters
, sizeof(to
->ExtendedRegisters
) );
1237 /***********************************************************************
1240 * Convert a register context to the server format.
1242 NTSTATUS
context_to_server( context_t
*to
, const CONTEXT
*from
)
1244 DWORD flags
= from
->ContextFlags
& ~CONTEXT_i386
; /* get rid of CPU id */
1246 memset( to
, 0, sizeof(*to
) );
1249 if (flags
& CONTEXT_CONTROL
)
1251 to
->flags
|= SERVER_CTX_CONTROL
;
1252 to
->ctl
.i386_regs
.ebp
= from
->Ebp
;
1253 to
->ctl
.i386_regs
.esp
= from
->Esp
;
1254 to
->ctl
.i386_regs
.eip
= from
->Eip
;
1255 to
->ctl
.i386_regs
.cs
= from
->SegCs
;
1256 to
->ctl
.i386_regs
.ss
= from
->SegSs
;
1257 to
->ctl
.i386_regs
.eflags
= from
->EFlags
;
1259 if (flags
& CONTEXT_INTEGER
)
1261 to
->flags
|= SERVER_CTX_INTEGER
;
1262 to
->integer
.i386_regs
.eax
= from
->Eax
;
1263 to
->integer
.i386_regs
.ebx
= from
->Ebx
;
1264 to
->integer
.i386_regs
.ecx
= from
->Ecx
;
1265 to
->integer
.i386_regs
.edx
= from
->Edx
;
1266 to
->integer
.i386_regs
.esi
= from
->Esi
;
1267 to
->integer
.i386_regs
.edi
= from
->Edi
;
1269 if (flags
& CONTEXT_SEGMENTS
)
1271 to
->flags
|= SERVER_CTX_SEGMENTS
;
1272 to
->seg
.i386_regs
.ds
= from
->SegDs
;
1273 to
->seg
.i386_regs
.es
= from
->SegEs
;
1274 to
->seg
.i386_regs
.fs
= from
->SegFs
;
1275 to
->seg
.i386_regs
.gs
= from
->SegGs
;
1277 if (flags
& CONTEXT_FLOATING_POINT
)
1279 to
->flags
|= SERVER_CTX_FLOATING_POINT
;
1280 to
->fp
.i386_regs
.ctrl
= from
->FloatSave
.ControlWord
;
1281 to
->fp
.i386_regs
.status
= from
->FloatSave
.StatusWord
;
1282 to
->fp
.i386_regs
.tag
= from
->FloatSave
.TagWord
;
1283 to
->fp
.i386_regs
.err_off
= from
->FloatSave
.ErrorOffset
;
1284 to
->fp
.i386_regs
.err_sel
= from
->FloatSave
.ErrorSelector
;
1285 to
->fp
.i386_regs
.data_off
= from
->FloatSave
.DataOffset
;
1286 to
->fp
.i386_regs
.data_sel
= from
->FloatSave
.DataSelector
;
1287 to
->fp
.i386_regs
.cr0npx
= from
->FloatSave
.Cr0NpxState
;
1288 memcpy( to
->fp
.i386_regs
.regs
, from
->FloatSave
.RegisterArea
, sizeof(to
->fp
.i386_regs
.regs
) );
1290 if (flags
& CONTEXT_DEBUG_REGISTERS
)
1292 to
->flags
|= SERVER_CTX_DEBUG_REGISTERS
;
1293 to
->debug
.i386_regs
.dr0
= from
->Dr0
;
1294 to
->debug
.i386_regs
.dr1
= from
->Dr1
;
1295 to
->debug
.i386_regs
.dr2
= from
->Dr2
;
1296 to
->debug
.i386_regs
.dr3
= from
->Dr3
;
1297 to
->debug
.i386_regs
.dr6
= from
->Dr6
;
1298 to
->debug
.i386_regs
.dr7
= from
->Dr7
;
1300 if (flags
& CONTEXT_EXTENDED_REGISTERS
)
1302 to
->flags
|= SERVER_CTX_EXTENDED_REGISTERS
;
1303 memcpy( to
->ext
.i386_regs
, from
->ExtendedRegisters
, sizeof(to
->ext
.i386_regs
) );
1305 return STATUS_SUCCESS
;
1309 /***********************************************************************
1310 * context_from_server
1312 * Convert a register context from the server format.
1314 NTSTATUS
context_from_server( CONTEXT
*to
, const context_t
*from
)
1316 if (from
->cpu
!= CPU_x86
) return STATUS_INVALID_PARAMETER
;
1318 to
->ContextFlags
= CONTEXT_i386
;
1319 if (from
->flags
& SERVER_CTX_CONTROL
)
1321 to
->ContextFlags
|= CONTEXT_CONTROL
;
1322 to
->Ebp
= from
->ctl
.i386_regs
.ebp
;
1323 to
->Esp
= from
->ctl
.i386_regs
.esp
;
1324 to
->Eip
= from
->ctl
.i386_regs
.eip
;
1325 to
->SegCs
= from
->ctl
.i386_regs
.cs
;
1326 to
->SegSs
= from
->ctl
.i386_regs
.ss
;
1327 to
->EFlags
= from
->ctl
.i386_regs
.eflags
;
1329 if (from
->flags
& SERVER_CTX_INTEGER
)
1331 to
->ContextFlags
|= CONTEXT_INTEGER
;
1332 to
->Eax
= from
->integer
.i386_regs
.eax
;
1333 to
->Ebx
= from
->integer
.i386_regs
.ebx
;
1334 to
->Ecx
= from
->integer
.i386_regs
.ecx
;
1335 to
->Edx
= from
->integer
.i386_regs
.edx
;
1336 to
->Esi
= from
->integer
.i386_regs
.esi
;
1337 to
->Edi
= from
->integer
.i386_regs
.edi
;
1339 if (from
->flags
& SERVER_CTX_SEGMENTS
)
1341 to
->ContextFlags
|= CONTEXT_SEGMENTS
;
1342 to
->SegDs
= from
->seg
.i386_regs
.ds
;
1343 to
->SegEs
= from
->seg
.i386_regs
.es
;
1344 to
->SegFs
= from
->seg
.i386_regs
.fs
;
1345 to
->SegGs
= from
->seg
.i386_regs
.gs
;
1347 if (from
->flags
& SERVER_CTX_FLOATING_POINT
)
1349 to
->ContextFlags
|= CONTEXT_FLOATING_POINT
;
1350 to
->FloatSave
.ControlWord
= from
->fp
.i386_regs
.ctrl
;
1351 to
->FloatSave
.StatusWord
= from
->fp
.i386_regs
.status
;
1352 to
->FloatSave
.TagWord
= from
->fp
.i386_regs
.tag
;
1353 to
->FloatSave
.ErrorOffset
= from
->fp
.i386_regs
.err_off
;
1354 to
->FloatSave
.ErrorSelector
= from
->fp
.i386_regs
.err_sel
;
1355 to
->FloatSave
.DataOffset
= from
->fp
.i386_regs
.data_off
;
1356 to
->FloatSave
.DataSelector
= from
->fp
.i386_regs
.data_sel
;
1357 to
->FloatSave
.Cr0NpxState
= from
->fp
.i386_regs
.cr0npx
;
1358 memcpy( to
->FloatSave
.RegisterArea
, from
->fp
.i386_regs
.regs
, sizeof(to
->FloatSave
.RegisterArea
) );
1360 if (from
->flags
& SERVER_CTX_DEBUG_REGISTERS
)
1362 to
->ContextFlags
|= CONTEXT_DEBUG_REGISTERS
;
1363 to
->Dr0
= from
->debug
.i386_regs
.dr0
;
1364 to
->Dr1
= from
->debug
.i386_regs
.dr1
;
1365 to
->Dr2
= from
->debug
.i386_regs
.dr2
;
1366 to
->Dr3
= from
->debug
.i386_regs
.dr3
;
1367 to
->Dr6
= from
->debug
.i386_regs
.dr6
;
1368 to
->Dr7
= from
->debug
.i386_regs
.dr7
;
1370 if (from
->flags
& SERVER_CTX_EXTENDED_REGISTERS
)
1372 to
->ContextFlags
|= CONTEXT_EXTENDED_REGISTERS
;
1373 memcpy( to
->ExtendedRegisters
, from
->ext
.i386_regs
, sizeof(to
->ExtendedRegisters
) );
1375 return STATUS_SUCCESS
;
1379 /***********************************************************************
1380 * is_privileged_instr
1382 * Check if the fault location is a privileged instruction.
1383 * Based on the instruction emulation code in dlls/kernel/instr.c.
1385 static inline DWORD
is_privileged_instr( CONTEXT86
*context
)
1388 unsigned int prefix_count
= 0;
1390 if (!wine_ldt_is_system( context
->SegCs
)) return 0;
1391 instr
= (BYTE
*)context
->Eip
;
1393 for (;;) switch(*instr
)
1395 /* instruction prefixes */
1396 case 0x2e: /* %cs: */
1397 case 0x36: /* %ss: */
1398 case 0x3e: /* %ds: */
1399 case 0x26: /* %es: */
1400 case 0x64: /* %fs: */
1401 case 0x65: /* %gs: */
1402 case 0x66: /* opcode size */
1403 case 0x67: /* addr size */
1404 case 0xf0: /* lock */
1405 case 0xf2: /* repne */
1406 case 0xf3: /* repe */
1407 if (++prefix_count
>= 15) return EXCEPTION_ILLEGAL_INSTRUCTION
;
1411 case 0x0f: /* extended instruction */
1414 case 0x20: /* mov crX, reg */
1415 case 0x21: /* mov drX, reg */
1416 case 0x22: /* mov reg, crX */
1417 case 0x23: /* mov reg drX */
1418 return EXCEPTION_PRIV_INSTRUCTION
;
1421 case 0x6c: /* insb (%dx) */
1422 case 0x6d: /* insl (%dx) */
1423 case 0x6e: /* outsb (%dx) */
1424 case 0x6f: /* outsl (%dx) */
1425 case 0xcd: /* int $xx */
1426 case 0xe4: /* inb al,XX */
1427 case 0xe5: /* in (e)ax,XX */
1428 case 0xe6: /* outb XX,al */
1429 case 0xe7: /* out XX,(e)ax */
1430 case 0xec: /* inb (%dx),%al */
1431 case 0xed: /* inl (%dx),%eax */
1432 case 0xee: /* outb %al,(%dx) */
1433 case 0xef: /* outl %eax,(%dx) */
1434 case 0xf4: /* hlt */
1435 case 0xfa: /* cli */
1436 case 0xfb: /* sti */
1437 return EXCEPTION_PRIV_INSTRUCTION
;
1444 #include "pshpack1.h"
1447 DWORD movl
; /* movl this,4(%esp) */
1449 BYTE jmp
; /* jmp func */
1452 #include "poppack.h"
1454 /**********************************************************************
1457 * Check if code destination is an ATL thunk, and emulate it if so.
1459 static BOOL
check_atl_thunk( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1461 const struct atl_thunk
*thunk
= (const struct atl_thunk
*)rec
->ExceptionInformation
[1];
1466 if (thunk
->movl
== 0x042444c7 && thunk
->jmp
== 0xe9)
1468 *((DWORD
*)context
->Esp
+ 1) = thunk
->this;
1469 context
->Eip
= (DWORD_PTR
)(&thunk
->func
+ 1) + thunk
->func
;
1470 TRACE( "emulating ATL thunk at %p, func=%08x arg=%08x\n",
1471 thunk
, context
->Eip
, *((DWORD
*)context
->Esp
+ 1) );
1484 /***********************************************************************
1485 * setup_exception_record
1487 * Setup the exception record and context on the thread stack.
1489 static EXCEPTION_RECORD
*setup_exception_record( SIGCONTEXT
*sigcontext
, void *stack_ptr
,
1490 WORD fs
, WORD gs
, raise_func func
)
1494 void *ret_addr
; /* return address from raise_func */
1495 EXCEPTION_RECORD
*rec_ptr
; /* first arg for raise_func */
1496 CONTEXT
*context_ptr
; /* second arg for raise_func */
1498 EXCEPTION_RECORD rec
;
1501 } *stack
= stack_ptr
;
1502 DWORD exception_code
= 0;
1504 /* stack sanity checks */
1506 if ((char *)stack
>= (char *)get_signal_stack() &&
1507 (char *)stack
< (char *)get_signal_stack() + signal_stack_size
)
1509 WINE_ERR( "nested exception on signal stack in thread %04x eip %08x esp %08x stack %p-%p\n",
1510 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1511 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->Tib
.StackLimit
,
1512 NtCurrentTeb()->Tib
.StackBase
);
1516 if (stack
- 1 > stack
|| /* check for overflow in subtraction */
1517 (char *)stack
<= (char *)NtCurrentTeb()->DeallocationStack
||
1518 (char *)stack
> (char *)NtCurrentTeb()->Tib
.StackBase
)
1520 WARN( "exception outside of stack limits in thread %04x eip %08x esp %08x stack %p-%p\n",
1521 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1522 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->Tib
.StackLimit
,
1523 NtCurrentTeb()->Tib
.StackBase
);
1525 else if ((char *)(stack
- 1) < (char *)NtCurrentTeb()->DeallocationStack
+ 4096)
1527 /* stack overflow on last page, unrecoverable */
1528 UINT diff
= (char *)NtCurrentTeb()->DeallocationStack
+ 4096 - (char *)(stack
- 1);
1529 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1530 diff
, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1531 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->DeallocationStack
,
1532 NtCurrentTeb()->Tib
.StackLimit
, NtCurrentTeb()->Tib
.StackBase
);
1535 else if ((char *)(stack
- 1) < (char *)NtCurrentTeb()->Tib
.StackLimit
)
1537 /* stack access below stack limit, may be recoverable */
1538 if (virtual_handle_stack_fault( stack
- 1 )) exception_code
= EXCEPTION_STACK_OVERFLOW
;
1541 UINT diff
= (char *)NtCurrentTeb()->Tib
.StackLimit
- (char *)(stack
- 1);
1542 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1543 diff
, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1544 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->DeallocationStack
,
1545 NtCurrentTeb()->Tib
.StackLimit
, NtCurrentTeb()->Tib
.StackBase
);
1550 stack
--; /* push the stack_layout structure */
1551 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
1552 VALGRIND_MAKE_MEM_UNDEFINED(stack
, sizeof(*stack
));
1553 #elif defined(VALGRIND_MAKE_WRITABLE)
1554 VALGRIND_MAKE_WRITABLE(stack
, sizeof(*stack
));
1556 stack
->ret_addr
= (void *)0xdeadbabe; /* raise_func must not return */
1557 stack
->rec_ptr
= &stack
->rec
;
1558 stack
->context_ptr
= &stack
->context
;
1560 stack
->rec
.ExceptionRecord
= NULL
;
1561 stack
->rec
.ExceptionCode
= exception_code
;
1562 stack
->rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
1563 stack
->rec
.ExceptionAddress
= (LPVOID
)EIP_sig(sigcontext
);
1564 stack
->rec
.NumberParameters
= 0;
1566 save_context( &stack
->context
, sigcontext
, fs
, gs
);
1568 /* now modify the sigcontext to return to the raise function */
1569 ESP_sig(sigcontext
) = (DWORD
)stack
;
1570 EIP_sig(sigcontext
) = (DWORD
)func
;
1571 /* clear single-step, direction, and align check flag */
1572 EFL_sig(sigcontext
) &= ~(0x100|0x400|0x40000);
1573 CS_sig(sigcontext
) = wine_get_cs();
1574 DS_sig(sigcontext
) = wine_get_ds();
1575 ES_sig(sigcontext
) = wine_get_es();
1576 FS_sig(sigcontext
) = wine_get_fs();
1577 GS_sig(sigcontext
) = wine_get_gs();
1578 SS_sig(sigcontext
) = wine_get_ss();
1580 return stack
->rec_ptr
;
1584 /***********************************************************************
1587 * Setup a proper stack frame for the raise function, and modify the
1588 * sigcontext so that the return from the signal handler will call
1589 * the raise function.
1591 static EXCEPTION_RECORD
*setup_exception( SIGCONTEXT
*sigcontext
, raise_func func
)
1594 void *stack
= init_handler( sigcontext
, &fs
, &gs
);
1596 return setup_exception_record( sigcontext
, stack
, fs
, gs
, func
);
1600 /***********************************************************************
1601 * get_exception_context
1603 * Get a pointer to the context built by setup_exception.
1605 static inline CONTEXT
*get_exception_context( EXCEPTION_RECORD
*rec
)
1607 return (CONTEXT
*)rec
- 1; /* cf. stack_layout structure */
1611 /**********************************************************************
1614 * Get the FPU exception code from the FPU status.
1616 static inline DWORD
get_fpu_code( const CONTEXT
*context
)
1618 DWORD status
= context
->FloatSave
.StatusWord
& ~(context
->FloatSave
.ControlWord
& 0x3f);
1620 if (status
& 0x01) /* IE */
1622 if (status
& 0x40) /* SF */
1623 return EXCEPTION_FLT_STACK_CHECK
;
1625 return EXCEPTION_FLT_INVALID_OPERATION
;
1627 if (status
& 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND
; /* DE flag */
1628 if (status
& 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO
; /* ZE flag */
1629 if (status
& 0x08) return EXCEPTION_FLT_OVERFLOW
; /* OE flag */
1630 if (status
& 0x10) return EXCEPTION_FLT_UNDERFLOW
; /* UE flag */
1631 if (status
& 0x20) return EXCEPTION_FLT_INEXACT_RESULT
; /* PE flag */
1632 return EXCEPTION_FLT_INVALID_OPERATION
; /* generic error */
1636 /**********************************************************************
1637 * raise_segv_exception
1639 static void WINAPI
raise_segv_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1643 switch(rec
->ExceptionCode
)
1645 case EXCEPTION_ACCESS_VIOLATION
:
1646 if (rec
->NumberParameters
== 2)
1648 if (rec
->ExceptionInformation
[0] == EXCEPTION_EXECUTE_FAULT
&& check_atl_thunk( rec
, context
))
1650 if (!(rec
->ExceptionCode
= virtual_handle_fault( (void *)rec
->ExceptionInformation
[1],
1651 rec
->ExceptionInformation
[0] )))
1655 case EXCEPTION_DATATYPE_MISALIGNMENT
:
1656 /* FIXME: pass through exception handler first? */
1657 if (context
->EFlags
& 0x00040000)
1659 /* Disable AC flag, return */
1660 context
->EFlags
&= ~0x00040000;
1665 status
= NtRaiseException( rec
, context
, TRUE
);
1666 if (status
) raise_status( status
, rec
);
1668 NtSetContextThread( GetCurrentThread(), context
);
1672 /**********************************************************************
1673 * raise_trap_exception
1675 static void WINAPI
raise_trap_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1679 if (rec
->ExceptionCode
== EXCEPTION_SINGLE_STEP
)
1681 struct ntdll_thread_regs
* const regs
= ntdll_get_thread_regs();
1683 /* when single stepping can't tell whether this is a hw bp or a
1684 * single step interrupt. try to avoid as much overhead as possible
1685 * and only do a server call if there is any hw bp enabled. */
1687 if( !(context
->EFlags
& 0x100) || (regs
->dr7
& 0xff) )
1689 /* (possible) hardware breakpoint, fetch the debug registers */
1690 context
->ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
1691 NtGetContextThread(GetCurrentThread(), context
);
1692 context
->ContextFlags
|= CONTEXT_FULL
; /* restore flags */
1695 context
->EFlags
&= ~0x100; /* clear single-step flag */
1698 status
= NtRaiseException( rec
, context
, TRUE
);
1699 if (status
) raise_status( status
, rec
);
1703 /**********************************************************************
1704 * raise_generic_exception
1706 * Generic raise function for exceptions that don't need special treatment.
1708 static void WINAPI
raise_generic_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1712 status
= NtRaiseException( rec
, context
, TRUE
);
1713 if (status
) raise_status( status
, rec
);
1718 /**********************************************************************
1719 * raise_vm86_sti_exception
1721 static void WINAPI
raise_vm86_sti_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1723 /* merge_vm86_pending_flags merges the vm86_pending flag in safely */
1724 get_vm86_teb_info()->vm86_pending
|= VIP_FLAG
;
1726 if (ntdll_get_thread_data()->vm86_ptr
)
1728 if (((char*)context
->Eip
>= (char*)vm86_return
) &&
1729 ((char*)context
->Eip
<= (char*)vm86_return_end
) &&
1730 (VM86_TYPE(context
->Eax
) != VM86_SIGNAL
)) {
1731 /* exiting from VM86, can't throw */
1734 merge_vm86_pending_flags( rec
);
1736 else if (get_vm86_teb_info()->dpmi_vif
&&
1737 !wine_ldt_is_system(context
->SegCs
) &&
1738 !wine_ldt_is_system(context
->SegSs
))
1740 /* Executing DPMI code and virtual interrupts are enabled. */
1741 get_vm86_teb_info()->vm86_pending
= 0;
1742 NtRaiseException( rec
, context
, TRUE
);
1745 NtSetContextThread( GetCurrentThread(), context
);
1749 /**********************************************************************
1752 * Handler for SIGUSR2.
1753 * We use it to signal that the running __wine_enter_vm86() should
1754 * immediately set VIP_FLAG, causing pending events to be handled
1755 * as early as possible.
1757 static void usr2_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1759 EXCEPTION_RECORD
*rec
= setup_exception( sigcontext
, raise_vm86_sti_exception
);
1760 rec
->ExceptionCode
= EXCEPTION_VM86_STI
;
1762 #endif /* __HAVE_VM86 */
1765 /**********************************************************************
1768 * Handler for SIGSEGV and related errors.
1770 static void segv_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1773 EXCEPTION_RECORD
*rec
;
1774 SIGCONTEXT
*context
= sigcontext
;
1775 void *stack
= init_handler( sigcontext
, &fs
, &gs
);
1777 /* check for page fault inside the thread stack */
1778 if (get_trap_code(context
) == TRAP_x86_PAGEFLT
&&
1779 (char *)siginfo
->si_addr
>= (char *)NtCurrentTeb()->DeallocationStack
&&
1780 (char *)siginfo
->si_addr
< (char *)NtCurrentTeb()->Tib
.StackBase
&&
1781 virtual_handle_stack_fault( siginfo
->si_addr
))
1783 /* check if this was the last guard page */
1784 if ((char *)siginfo
->si_addr
< (char *)NtCurrentTeb()->DeallocationStack
+ 2*4096)
1786 rec
= setup_exception_record( context
, stack
, fs
, gs
, raise_segv_exception
);
1787 rec
->ExceptionCode
= EXCEPTION_STACK_OVERFLOW
;
1792 rec
= setup_exception_record( context
, stack
, fs
, gs
, raise_segv_exception
);
1793 if (rec
->ExceptionCode
== EXCEPTION_STACK_OVERFLOW
) return;
1795 switch(get_trap_code(context
))
1797 case TRAP_x86_OFLOW
: /* Overflow exception */
1798 rec
->ExceptionCode
= EXCEPTION_INT_OVERFLOW
;
1800 case TRAP_x86_BOUND
: /* Bound range exception */
1801 rec
->ExceptionCode
= EXCEPTION_ARRAY_BOUNDS_EXCEEDED
;
1803 case TRAP_x86_PRIVINFLT
: /* Invalid opcode exception */
1804 rec
->ExceptionCode
= EXCEPTION_ILLEGAL_INSTRUCTION
;
1806 case TRAP_x86_STKFLT
: /* Stack fault */
1807 rec
->ExceptionCode
= EXCEPTION_STACK_OVERFLOW
;
1809 case TRAP_x86_SEGNPFLT
: /* Segment not present exception */
1810 case TRAP_x86_PROTFLT
: /* General protection fault */
1811 case TRAP_x86_UNKNOWN
: /* Unknown fault code */
1813 WORD err
= get_error_code(context
);
1814 if (!err
&& (rec
->ExceptionCode
= is_privileged_instr( get_exception_context(rec
) ))) break;
1815 rec
->ExceptionCode
= EXCEPTION_ACCESS_VIOLATION
;
1816 rec
->NumberParameters
= 2;
1817 rec
->ExceptionInformation
[0] = 0;
1818 /* if error contains a LDT selector, use that as fault address */
1819 if ((err
& 7) == 4 && !wine_ldt_is_system( err
| 7 ))
1820 rec
->ExceptionInformation
[1] = err
& ~7;
1822 rec
->ExceptionInformation
[1] = 0xffffffff;
1825 case TRAP_x86_PAGEFLT
: /* Page fault */
1826 rec
->ExceptionCode
= EXCEPTION_ACCESS_VIOLATION
;
1827 rec
->NumberParameters
= 2;
1828 rec
->ExceptionInformation
[0] = (get_error_code(context
) >> 1) & 0x09;
1829 rec
->ExceptionInformation
[1] = (ULONG_PTR
)siginfo
->si_addr
;
1831 case TRAP_x86_ALIGNFLT
: /* Alignment check exception */
1832 rec
->ExceptionCode
= EXCEPTION_DATATYPE_MISALIGNMENT
;
1835 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context
) );
1837 case TRAP_x86_NMI
: /* NMI interrupt */
1838 case TRAP_x86_DNA
: /* Device not available exception */
1839 case TRAP_x86_DOUBLEFLT
: /* Double fault exception */
1840 case TRAP_x86_TSSFLT
: /* Invalid TSS exception */
1841 case TRAP_x86_MCHK
: /* Machine check exception */
1842 case TRAP_x86_CACHEFLT
: /* Cache flush exception */
1843 rec
->ExceptionCode
= EXCEPTION_ILLEGAL_INSTRUCTION
;
1849 /**********************************************************************
1852 * Handler for SIGTRAP.
1854 static void trap_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1856 SIGCONTEXT
*context
= sigcontext
;
1857 EXCEPTION_RECORD
*rec
= setup_exception( context
, raise_trap_exception
);
1859 switch(get_trap_code(context
))
1861 case TRAP_x86_TRCTRAP
: /* Single-step exception */
1862 rec
->ExceptionCode
= EXCEPTION_SINGLE_STEP
;
1864 case TRAP_x86_BPTFLT
: /* Breakpoint exception */
1865 rec
->ExceptionAddress
= (char *)rec
->ExceptionAddress
- 1; /* back up over the int3 instruction */
1868 rec
->ExceptionCode
= EXCEPTION_BREAKPOINT
;
1874 /**********************************************************************
1877 * Handler for SIGFPE.
1879 static void fpe_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1881 CONTEXT
*win_context
;
1882 SIGCONTEXT
*context
= sigcontext
;
1883 EXCEPTION_RECORD
*rec
= setup_exception( context
, raise_generic_exception
);
1885 win_context
= get_exception_context( rec
);
1887 switch(get_trap_code(context
))
1889 case TRAP_x86_DIVIDE
: /* Division by zero exception */
1890 rec
->ExceptionCode
= EXCEPTION_INT_DIVIDE_BY_ZERO
;
1892 case TRAP_x86_FPOPFLT
: /* Coprocessor segment overrun */
1893 rec
->ExceptionCode
= EXCEPTION_FLT_INVALID_OPERATION
;
1895 case TRAP_x86_ARITHTRAP
: /* Floating point exception */
1896 case TRAP_x86_UNKNOWN
: /* Unknown fault code */
1897 rec
->ExceptionCode
= get_fpu_code( win_context
);
1898 rec
->ExceptionAddress
= (LPVOID
)win_context
->FloatSave
.ErrorOffset
;
1900 case TRAP_x86_CACHEFLT
: /* SIMD exception */
1902 * Behaviour only tested for divide-by-zero exceptions
1903 * Check for other SIMD exceptions as well */
1904 if(siginfo
->si_code
!= FPE_FLTDIV
)
1905 FIXME("untested SIMD exception: %#x. Might not work correctly\n",
1908 rec
->ExceptionCode
= STATUS_FLOAT_MULTIPLE_TRAPS
;
1909 rec
->NumberParameters
= 1;
1910 /* no idea what meaning is actually behind this but that's what native does */
1911 rec
->ExceptionInformation
[0] = 0;
1914 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context
) );
1915 rec
->ExceptionCode
= EXCEPTION_FLT_INVALID_OPERATION
;
1921 /**********************************************************************
1924 * Handler for SIGINT.
1926 * FIXME: should not be calling external functions on the signal stack.
1928 static void int_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1931 init_handler( sigcontext
, &fs
, &gs
);
1932 if (!dispatch_signal(SIGINT
))
1934 EXCEPTION_RECORD
*rec
= setup_exception( sigcontext
, raise_generic_exception
);
1935 rec
->ExceptionCode
= CONTROL_C_EXIT
;
1939 /**********************************************************************
1942 * Handler for SIGABRT.
1944 static void abrt_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1946 EXCEPTION_RECORD
*rec
= setup_exception( sigcontext
, raise_generic_exception
);
1947 rec
->ExceptionCode
= EXCEPTION_WINE_ASSERTION
;
1948 rec
->ExceptionFlags
= EH_NONCONTINUABLE
;
1952 /**********************************************************************
1955 * Handler for SIGQUIT.
1957 static void quit_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1960 init_handler( sigcontext
, &fs
, &gs
);
1965 /**********************************************************************
1968 * Handler for SIGUSR1, used to signal a thread that it got suspended.
1970 static void usr1_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1975 init_handler( sigcontext
, &fs
, &gs
);
1976 save_context( &context
, sigcontext
, fs
, gs
);
1977 wait_suspend( &context
);
1978 restore_context( &context
, sigcontext
);
1982 /**********************************************************************
1983 * get_signal_stack_total_size
1985 * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
1986 * Must be a power of two.
1988 size_t get_signal_stack_total_size(void)
1990 if (!signal_stack_size
)
1992 size_t size
= 8192, min_size
= teb_size
+ max( MINSIGSTKSZ
, 8192 );
1993 /* find the first power of two not smaller than min_size */
1994 while (size
< min_size
) size
*= 2;
1995 signal_stack_mask
= size
- 1;
1996 signal_stack_size
= size
- teb_size
;
1998 return signal_stack_size
+ teb_size
;
2002 /***********************************************************************
2003 * __wine_set_signal_handler (NTDLL.@)
2005 int CDECL
__wine_set_signal_handler(unsigned int sig
, wine_signal_handler wsh
)
2007 if (sig
>= sizeof(handlers
) / sizeof(handlers
[0])) return -1;
2008 if (handlers
[sig
] != NULL
) return -2;
2009 handlers
[sig
] = wsh
;
2014 /**********************************************************************
2015 * signal_init_thread
2017 void signal_init_thread( TEB
*teb
)
2019 struct ntdll_thread_data
*thread_data
= (struct ntdll_thread_data
*)teb
->SystemReserved2
;
2024 int mib
[2], val
= 1;
2027 mib
[1] = KERN_THALTSTACK
;
2028 sysctl( mib
, 2, NULL
, NULL
, &val
, sizeof(val
) );
2031 ss
.ss_sp
= (char *)teb
+ teb_size
;
2032 ss
.ss_size
= signal_stack_size
;
2034 if (sigaltstack(&ss
, NULL
) == -1) perror( "sigaltstack" );
2036 wine_ldt_set_base( &fs_entry
, teb
);
2037 wine_ldt_set_limit( &fs_entry
, teb_size
- 1 );
2038 wine_ldt_set_flags( &fs_entry
, WINE_LDT_FLAGS_DATA
|WINE_LDT_FLAGS_32BIT
);
2039 wine_ldt_init_fs( thread_data
->fs
, &fs_entry
);
2040 thread_data
->gs
= wine_get_gs();
2043 /**********************************************************************
2044 * signal_init_process
2046 void signal_init_process(void)
2048 struct sigaction sig_act
;
2050 sig_act
.sa_mask
= server_block_set
;
2051 sig_act
.sa_flags
= SA_SIGINFO
| SA_RESTART
;
2053 sig_act
.sa_flags
|= SA_ONSTACK
;
2056 sig_act
.sa_sigaction
= int_handler
;
2057 if (sigaction( SIGINT
, &sig_act
, NULL
) == -1) goto error
;
2058 sig_act
.sa_sigaction
= fpe_handler
;
2059 if (sigaction( SIGFPE
, &sig_act
, NULL
) == -1) goto error
;
2060 sig_act
.sa_sigaction
= abrt_handler
;
2061 if (sigaction( SIGABRT
, &sig_act
, NULL
) == -1) goto error
;
2062 sig_act
.sa_sigaction
= quit_handler
;
2063 if (sigaction( SIGQUIT
, &sig_act
, NULL
) == -1) goto error
;
2064 sig_act
.sa_sigaction
= usr1_handler
;
2065 if (sigaction( SIGUSR1
, &sig_act
, NULL
) == -1) goto error
;
2067 sig_act
.sa_sigaction
= segv_handler
;
2068 if (sigaction( SIGSEGV
, &sig_act
, NULL
) == -1) goto error
;
2069 if (sigaction( SIGILL
, &sig_act
, NULL
) == -1) goto error
;
2071 if (sigaction( SIGBUS
, &sig_act
, NULL
) == -1) goto error
;
2075 sig_act
.sa_sigaction
= trap_handler
;
2076 if (sigaction( SIGTRAP
, &sig_act
, NULL
) == -1) goto error
;
2080 sig_act
.sa_sigaction
= usr2_handler
;
2081 if (sigaction( SIGUSR2
, &sig_act
, NULL
) == -1) goto error
;
2087 perror("sigaction");
2093 /**********************************************************************
2094 * __wine_enter_vm86 (NTDLL.@)
2096 * Enter vm86 mode with the specified register context.
2098 void __wine_enter_vm86( CONTEXT
*context
)
2100 EXCEPTION_RECORD rec
;
2102 struct vm86plus_struct vm86
;
2104 memset( &vm86
, 0, sizeof(vm86
) );
2107 restore_vm86_context( context
, &vm86
);
2109 ntdll_get_thread_data()->vm86_ptr
= &vm86
;
2110 merge_vm86_pending_flags( &rec
);
2112 res
= vm86_enter( &ntdll_get_thread_data()->vm86_ptr
); /* uses and clears teb->vm86_ptr */
2119 save_vm86_context( context
, &vm86
);
2121 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
2122 rec
.ExceptionRecord
= NULL
;
2123 rec
.ExceptionAddress
= (LPVOID
)context
->Eip
;
2124 rec
.NumberParameters
= 0;
2126 switch(VM86_TYPE(res
))
2128 case VM86_UNKNOWN
: /* unhandled GP fault - IO-instruction or similar */
2129 rec
.ExceptionCode
= EXCEPTION_PRIV_INSTRUCTION
;
2131 case VM86_TRAP
: /* return due to DOS-debugger request */
2132 switch(VM86_ARG(res
))
2134 case TRAP_x86_TRCTRAP
: /* Single-step exception */
2135 rec
.ExceptionCode
= EXCEPTION_SINGLE_STEP
;
2137 case TRAP_x86_BPTFLT
: /* Breakpoint exception */
2138 rec
.ExceptionAddress
= (char *)rec
.ExceptionAddress
- 1; /* back up over the int3 instruction */
2141 rec
.ExceptionCode
= EXCEPTION_BREAKPOINT
;
2145 case VM86_INTx
: /* int3/int x instruction (ARG = x) */
2146 rec
.ExceptionCode
= EXCEPTION_VM86_INTx
;
2147 rec
.NumberParameters
= 1;
2148 rec
.ExceptionInformation
[0] = VM86_ARG(res
);
2150 case VM86_STI
: /* sti/popf/iret instruction enabled virtual interrupts */
2151 context
->EFlags
|= VIF_FLAG
;
2152 context
->EFlags
&= ~VIP_FLAG
;
2153 get_vm86_teb_info()->vm86_pending
= 0;
2154 rec
.ExceptionCode
= EXCEPTION_VM86_STI
;
2156 case VM86_PICRETURN
: /* return due to pending PIC request */
2157 rec
.ExceptionCode
= EXCEPTION_VM86_PICRETURN
;
2159 case VM86_SIGNAL
: /* cannot happen because vm86_enter handles this case */
2161 WINE_ERR( "unhandled result from vm86 mode %x\n", res
);
2164 raise_exception( &rec
, context
, TRUE
);
2168 #else /* __HAVE_VM86 */
2169 /**********************************************************************
2170 * __wine_enter_vm86 (NTDLL.@)
2172 void __wine_enter_vm86( CONTEXT
*context
)
2174 MESSAGE("vm86 mode not supported on this platform\n");
2176 #endif /* __HAVE_VM86 */
2179 /*******************************************************************
2180 * RtlUnwind (NTDLL.@)
2182 void WINAPI
__regs_RtlUnwind( EXCEPTION_REGISTRATION_RECORD
* pEndFrame
, PVOID targetIp
,
2183 PEXCEPTION_RECORD pRecord
, PVOID retval
, CONTEXT
*context
)
2185 EXCEPTION_RECORD record
;
2186 EXCEPTION_REGISTRATION_RECORD
*frame
, *dispatch
;
2189 context
->Eax
= (DWORD
)retval
;
2191 /* build an exception record, if we do not have one */
2194 record
.ExceptionCode
= STATUS_UNWIND
;
2195 record
.ExceptionFlags
= 0;
2196 record
.ExceptionRecord
= NULL
;
2197 record
.ExceptionAddress
= (void *)context
->Eip
;
2198 record
.NumberParameters
= 0;
2202 pRecord
->ExceptionFlags
|= EH_UNWINDING
| (pEndFrame
? 0 : EH_EXIT_UNWIND
);
2204 TRACE( "code=%x flags=%x\n", pRecord
->ExceptionCode
, pRecord
->ExceptionFlags
);
2206 /* get chain of exception frames */
2207 frame
= NtCurrentTeb()->Tib
.ExceptionList
;
2208 while ((frame
!= (EXCEPTION_REGISTRATION_RECORD
*)~0UL) && (frame
!= pEndFrame
))
2210 /* Check frame address */
2211 if (pEndFrame
&& (frame
> pEndFrame
))
2212 raise_status( STATUS_INVALID_UNWIND_TARGET
, pRecord
);
2214 if (((void*)frame
< NtCurrentTeb()->Tib
.StackLimit
) ||
2215 ((void*)(frame
+1) > NtCurrentTeb()->Tib
.StackBase
) ||
2216 (UINT_PTR
)frame
& 3)
2217 raise_status( STATUS_BAD_STACK
, pRecord
);
2220 TRACE( "calling handler at %p code=%x flags=%x\n",
2221 frame
->Handler
, pRecord
->ExceptionCode
, pRecord
->ExceptionFlags
);
2222 res
= EXC_CallHandler( pRecord
, frame
, context
, &dispatch
, frame
->Handler
, unwind_handler
);
2223 TRACE( "handler at %p returned %x\n", frame
->Handler
, res
);
2227 case ExceptionContinueSearch
:
2229 case ExceptionCollidedUnwind
:
2233 raise_status( STATUS_INVALID_DISPOSITION
, pRecord
);
2236 frame
= __wine_pop_frame( frame
);
2239 DEFINE_REGS_ENTRYPOINT( RtlUnwind
, 4 )
2242 /*******************************************************************
2243 * NtRaiseException (NTDLL.@)
2245 NTSTATUS WINAPI
NtRaiseException( EXCEPTION_RECORD
*rec
, CONTEXT
*context
, BOOL first_chance
)
2247 NTSTATUS status
= raise_exception( rec
, context
, first_chance
);
2248 if (status
== STATUS_SUCCESS
) NtSetContextThread( GetCurrentThread(), context
);
2253 /***********************************************************************
2254 * RtlRaiseException (NTDLL.@)
2256 void WINAPI
__regs_RtlRaiseException( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
2260 rec
->ExceptionAddress
= (void *)context
->Eip
;
2261 status
= raise_exception( rec
, context
, TRUE
);
2262 if (status
!= STATUS_SUCCESS
) raise_status( status
, rec
);
2264 DEFINE_REGS_ENTRYPOINT( RtlRaiseException
, 1 )
2267 /**********************************************************************
2268 * DbgBreakPoint (NTDLL.@)
2270 __ASM_GLOBAL_FUNC( DbgBreakPoint
, "int $3; ret")
2272 /**********************************************************************
2273 * DbgUserBreakPoint (NTDLL.@)
2275 __ASM_GLOBAL_FUNC( DbgUserBreakPoint
, "int $3; ret")
2277 /**********************************************************************
2278 * NtCurrentTeb (NTDLL.@)
2280 __ASM_GLOBAL_FUNC( NtCurrentTeb
, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" )
2283 /**********************************************************************
2284 * EXC_CallHandler (internal)
2286 * Some exception handlers depend on EBP to have a fixed position relative to
2287 * the exception frame.
2288 * Shrinker depends on (*1) doing what it does,
2289 * (*2) being the exact instruction it is and (*3) beginning with 0x64
2290 * (i.e. the %fs prefix to the movl instruction). It also depends on the
2291 * function calling the handler having only 5 parameters (*4).
2293 __ASM_GLOBAL_FUNC( EXC_CallHandler
,
2295 " movl %esp, %ebp\n"
2297 " movl 28(%ebp), %edx\n" /* ugly hack to pass the 6th param needed because of Shrinker */
2303 " call " __ASM_NAME("call_exception_handler") "\n"
2308 __ASM_GLOBAL_FUNC(call_exception_handler
,
2310 " movl %esp, %ebp\n"
2312 " pushl 12(%ebp)\n" /* make any exceptions in this... */
2313 " pushl %edx\n" /* handler be handled by... */
2315 " pushl (0)\n" /* nested_handler (passed in edx). */
2317 " movl %esp,(0)\n" /* push the new exception frame onto the exception stack. */
2322 " movl 24(%ebp), %ecx\n" /* (*1) */
2323 " call *%ecx\n" /* call handler. (*2) */
2325 " movl (0), %esp\n" /* restore previous... (*3) */
2327 " popl (0)\n" /* exception frame. */
2328 " movl %ebp, %esp\n" /* restore saved stack, in case it was corrupted */
2330 " ret $20\n" /* (*4) */
2332 #endif /* __i386__ */