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 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
141 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
143 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
145 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
146 "movl $166,%eax\n\t" /*SYS_vm86*/
147 "movl 8(%ebp),%ecx\n\t" /* vm86_ptr */
148 "movl (%ecx),%ecx\n\t"
149 "movl $1,%ebx\n\t" /*VM86_ENTER*/
150 "pushl %ecx\n\t" /* put vm86plus_struct ptr somewhere we can find it */
154 ".globl " __ASM_NAME("vm86_return") "\n\t"
155 __ASM_FUNC("vm86_return") "\n"
156 __ASM_NAME("vm86_return") ":\n\t"
161 __ASM_CFI(".cfi_same_value %ebx\n\t")
163 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
164 __ASM_CFI(".cfi_same_value %ebp\n\t")
165 "testl %eax,%eax\n\t"
167 "cmpb $0,%al\n\t" /* VM86_SIGNAL */
168 "je " __ASM_NAME("vm86_enter") "\n\t"
170 "movl 4(%esp),%ecx\n\t" /* vm86_ptr */
172 ".globl " __ASM_NAME("vm86_return_end") "\n\t"
173 __ASM_FUNC("vm86_return_end") "\n"
174 __ASM_NAME("vm86_return_end") ":\n\t"
177 #ifdef HAVE_SYS_VM86_H
185 #include <machine/frame.h>
186 typedef struct trapframe SIGCONTEXT
;
188 #define EAX_sig(context) ((context)->tf_eax)
189 #define EBX_sig(context) ((context)->tf_ebx)
190 #define ECX_sig(context) ((context)->tf_ecx)
191 #define EDX_sig(context) ((context)->tf_edx)
192 #define ESI_sig(context) ((context)->tf_esi)
193 #define EDI_sig(context) ((context)->tf_edi)
194 #define EBP_sig(context) ((context)->tf_ebp)
196 #define CS_sig(context) ((context)->tf_cs)
197 #define DS_sig(context) ((context)->tf_ds)
198 #define ES_sig(context) ((context)->tf_es)
199 #define SS_sig(context) ((context)->tf_ss)
201 #define EFL_sig(context) ((context)->tf_eflags)
203 #define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
204 #define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
206 #define FPU_sig(context) NULL /* FIXME */
207 #define FPUX_sig(context) NULL /* FIXME */
211 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
213 typedef struct sigcontext SIGCONTEXT
;
215 #define EAX_sig(context) ((context)->sc_eax)
216 #define EBX_sig(context) ((context)->sc_ebx)
217 #define ECX_sig(context) ((context)->sc_ecx)
218 #define EDX_sig(context) ((context)->sc_edx)
219 #define ESI_sig(context) ((context)->sc_esi)
220 #define EDI_sig(context) ((context)->sc_edi)
221 #define EBP_sig(context) ((context)->sc_ebp)
223 #define CS_sig(context) ((context)->sc_cs)
224 #define DS_sig(context) ((context)->sc_ds)
225 #define ES_sig(context) ((context)->sc_es)
226 #define FS_sig(context) ((context)->sc_fs)
227 #define GS_sig(context) ((context)->sc_gs)
228 #define SS_sig(context) ((context)->sc_ss)
230 #define TRAP_sig(context) ((context)->sc_trapno)
231 #define ERROR_sig(context) ((context)->sc_err)
232 #define EFL_sig(context) ((context)->sc_eflags)
234 #define EIP_sig(context) ((context)->sc_eip)
235 #define ESP_sig(context) ((context)->sc_esp)
237 #define FPU_sig(context) NULL /* FIXME */
238 #define FPUX_sig(context) NULL /* FIXME */
240 #endif /* __FreeBSD__ */
244 typedef struct sigcontext SIGCONTEXT
;
246 #define EAX_sig(context) ((context)->sc_eax)
247 #define EBX_sig(context) ((context)->sc_ebx)
248 #define ECX_sig(context) ((context)->sc_ecx)
249 #define EDX_sig(context) ((context)->sc_edx)
250 #define ESI_sig(context) ((context)->sc_esi)
251 #define EDI_sig(context) ((context)->sc_edi)
252 #define EBP_sig(context) ((context)->sc_ebp)
254 #define CS_sig(context) ((context)->sc_cs)
255 #define DS_sig(context) ((context)->sc_ds)
256 #define ES_sig(context) ((context)->sc_es)
257 #define FS_sig(context) ((context)->sc_fs)
258 #define GS_sig(context) ((context)->sc_gs)
259 #define SS_sig(context) ((context)->sc_ss)
261 #define TRAP_sig(context) ((context)->sc_trapno)
262 #define ERROR_sig(context) ((context)->sc_err)
263 #define EFL_sig(context) ((context)->sc_eflags)
265 #define EIP_sig(context) ((context)->sc_eip)
266 #define ESP_sig(context) ((context)->sc_esp)
268 #define FPU_sig(context) NULL /* FIXME */
269 #define FPUX_sig(context) NULL /* FIXME */
271 #define T_MCHK T_MACHK
272 #define T_XMMFLT T_XFTRAP
274 #endif /* __OpenBSD__ */
276 #if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
279 #include <sys/regset.h>
281 #include <sys/ucontext.h>
282 typedef struct ucontext SIGCONTEXT
;
288 #define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
289 #define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
290 #define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
291 #define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
292 #define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
293 #define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
294 #define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
296 #define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
297 #define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
298 #define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
299 #define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
301 #define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
302 #define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
304 #define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
306 #define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
308 #define ESP_sig(context) ((context)->uc_mcontext.gregs[UESP])
310 #define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
312 #define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
315 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[ERR])
318 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
321 #define FPU_sig(context) NULL /* FIXME */
322 #define FPUX_sig(context) NULL /* FIXME */
324 #endif /* svr4 || SCO_DS */
327 # include <sys/ucontext.h>
329 typedef ucontext_t SIGCONTEXT
;
331 /* work around silly renaming of struct members in OS X 10.5 */
332 #if __DARWIN_UNIX03 && defined(_STRUCT_X86_EXCEPTION_STATE32)
333 #define EAX_sig(context) ((context)->uc_mcontext->__ss.__eax)
334 #define EBX_sig(context) ((context)->uc_mcontext->__ss.__ebx)
335 #define ECX_sig(context) ((context)->uc_mcontext->__ss.__ecx)
336 #define EDX_sig(context) ((context)->uc_mcontext->__ss.__edx)
337 #define ESI_sig(context) ((context)->uc_mcontext->__ss.__esi)
338 #define EDI_sig(context) ((context)->uc_mcontext->__ss.__edi)
339 #define EBP_sig(context) ((context)->uc_mcontext->__ss.__ebp)
340 #define CS_sig(context) ((context)->uc_mcontext->__ss.__cs)
341 #define DS_sig(context) ((context)->uc_mcontext->__ss.__ds)
342 #define ES_sig(context) ((context)->uc_mcontext->__ss.__es)
343 #define FS_sig(context) ((context)->uc_mcontext->__ss.__fs)
344 #define GS_sig(context) ((context)->uc_mcontext->__ss.__gs)
345 #define SS_sig(context) ((context)->uc_mcontext->__ss.__ss)
346 #define EFL_sig(context) ((context)->uc_mcontext->__ss.__eflags)
347 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__eip))
348 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__esp))
349 #define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno)
350 #define ERROR_sig(context) ((context)->uc_mcontext->__es.__err)
351 #define FPU_sig(context) NULL
352 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->__fs.__fpu_fcw)
354 #define EAX_sig(context) ((context)->uc_mcontext->ss.eax)
355 #define EBX_sig(context) ((context)->uc_mcontext->ss.ebx)
356 #define ECX_sig(context) ((context)->uc_mcontext->ss.ecx)
357 #define EDX_sig(context) ((context)->uc_mcontext->ss.edx)
358 #define ESI_sig(context) ((context)->uc_mcontext->ss.esi)
359 #define EDI_sig(context) ((context)->uc_mcontext->ss.edi)
360 #define EBP_sig(context) ((context)->uc_mcontext->ss.ebp)
361 #define CS_sig(context) ((context)->uc_mcontext->ss.cs)
362 #define DS_sig(context) ((context)->uc_mcontext->ss.ds)
363 #define ES_sig(context) ((context)->uc_mcontext->ss.es)
364 #define FS_sig(context) ((context)->uc_mcontext->ss.fs)
365 #define GS_sig(context) ((context)->uc_mcontext->ss.gs)
366 #define SS_sig(context) ((context)->uc_mcontext->ss.ss)
367 #define EFL_sig(context) ((context)->uc_mcontext->ss.eflags)
368 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip))
369 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.esp))
370 #define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
371 #define ERROR_sig(context) ((context)->uc_mcontext->es.err)
372 #define FPU_sig(context) NULL
373 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->fs.fpu_fcw)
376 #endif /* __APPLE__ */
378 #if defined(__NetBSD__)
379 # include <sys/ucontext.h>
380 # include <sys/types.h>
383 typedef ucontext_t SIGCONTEXT
;
385 #define EAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EAX])
386 #define EBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBX])
387 #define ECX_sig(context) ((context)->uc_mcontext.__gregs[_REG_ECX])
388 #define EDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDX])
389 #define ESI_sig(context) ((context)->uc_mcontext.__gregs[_REG_ESI])
390 #define EDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDI])
391 #define EBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBP])
392 #define ESP_sig(context) _UC_MACHINE_SP(context)
394 #define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
395 #define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
396 #define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
397 #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
398 #define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
399 #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
401 #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_EFL])
402 #define EIP_sig(context) _UC_MACHINE_PC(context)
403 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
404 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
406 #define FPU_sig(context) NULL
407 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&((context)->uc_mcontext.__fpregs))
410 #define T_XMMFLT T_XMM
412 #endif /* __NetBSD__ */
414 WINE_DEFAULT_DEBUG_CHANNEL(seh
);
416 typedef int (*wine_signal_handler
)(unsigned int sig
);
418 static const size_t teb_size
= 4096; /* we reserve one page for the TEB */
419 static size_t signal_stack_mask
;
420 static size_t signal_stack_size
;
422 static wine_signal_handler handlers
[256];
424 static int fpux_support
; /* whether the CPU support extended fpu context */
426 extern void DECLSPEC_NORETURN
__wine_call_from_32_restore_regs( const CONTEXT
*context
);
430 TRAP_x86_UNKNOWN
= -1, /* Unknown fault (TRAP_sig not defined) */
431 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
432 TRAP_x86_DIVIDE
= T_DIVIDE
, /* Division by zero exception */
433 TRAP_x86_TRCTRAP
= T_TRCTRAP
, /* Single-step exception */
434 TRAP_x86_NMI
= T_NMI
, /* NMI interrupt */
435 TRAP_x86_BPTFLT
= T_BPTFLT
, /* Breakpoint exception */
436 TRAP_x86_OFLOW
= T_OFLOW
, /* Overflow exception */
437 TRAP_x86_BOUND
= T_BOUND
, /* Bound range exception */
438 TRAP_x86_PRIVINFLT
= T_PRIVINFLT
, /* Invalid opcode exception */
439 TRAP_x86_DNA
= T_DNA
, /* Device not available exception */
440 TRAP_x86_DOUBLEFLT
= T_DOUBLEFLT
, /* Double fault exception */
441 TRAP_x86_FPOPFLT
= T_FPOPFLT
, /* Coprocessor segment overrun */
442 TRAP_x86_TSSFLT
= T_TSSFLT
, /* Invalid TSS exception */
443 TRAP_x86_SEGNPFLT
= T_SEGNPFLT
, /* Segment not present exception */
444 TRAP_x86_STKFLT
= T_STKFLT
, /* Stack fault */
445 TRAP_x86_PROTFLT
= T_PROTFLT
, /* General protection fault */
446 TRAP_x86_PAGEFLT
= T_PAGEFLT
, /* Page fault */
447 TRAP_x86_ARITHTRAP
= T_ARITHTRAP
, /* Floating point exception */
448 TRAP_x86_ALIGNFLT
= T_ALIGNFLT
, /* Alignment check exception */
449 TRAP_x86_MCHK
= T_MCHK
, /* Machine check exception */
450 TRAP_x86_CACHEFLT
= T_XMMFLT
/* Cache flush exception */
452 TRAP_x86_DIVIDE
= 0, /* Division by zero exception */
453 TRAP_x86_TRCTRAP
= 1, /* Single-step exception */
454 TRAP_x86_NMI
= 2, /* NMI interrupt */
455 TRAP_x86_BPTFLT
= 3, /* Breakpoint exception */
456 TRAP_x86_OFLOW
= 4, /* Overflow exception */
457 TRAP_x86_BOUND
= 5, /* Bound range exception */
458 TRAP_x86_PRIVINFLT
= 6, /* Invalid opcode exception */
459 TRAP_x86_DNA
= 7, /* Device not available exception */
460 TRAP_x86_DOUBLEFLT
= 8, /* Double fault exception */
461 TRAP_x86_FPOPFLT
= 9, /* Coprocessor segment overrun */
462 TRAP_x86_TSSFLT
= 10, /* Invalid TSS exception */
463 TRAP_x86_SEGNPFLT
= 11, /* Segment not present exception */
464 TRAP_x86_STKFLT
= 12, /* Stack fault */
465 TRAP_x86_PROTFLT
= 13, /* General protection fault */
466 TRAP_x86_PAGEFLT
= 14, /* Page fault */
467 TRAP_x86_ARITHTRAP
= 16, /* Floating point exception */
468 TRAP_x86_ALIGNFLT
= 17, /* Alignment check exception */
469 TRAP_x86_MCHK
= 18, /* Machine check exception */
470 TRAP_x86_CACHEFLT
= 19 /* SIMD exception (via SIGFPE) if CPU is SSE capable
471 otherwise Cache flush exception (via SIGSEV) */
475 /* Exception record for handling exceptions happening inside exception handlers */
478 EXCEPTION_REGISTRATION_RECORD frame
;
479 EXCEPTION_REGISTRATION_RECORD
*prevFrame
;
482 extern DWORD
EXC_CallHandler( EXCEPTION_RECORD
*record
, EXCEPTION_REGISTRATION_RECORD
*frame
,
483 CONTEXT
*context
, EXCEPTION_REGISTRATION_RECORD
**dispatcher
,
484 PEXCEPTION_HANDLER handler
, PEXCEPTION_HANDLER nested_handler
);
486 /***********************************************************************
489 static inline int dispatch_signal(unsigned int sig
)
491 if (handlers
[sig
] == NULL
) return 0;
492 return handlers
[sig
](sig
);
496 /***********************************************************************
499 * Get the trap code for a signal.
501 static inline enum i386_trap_code
get_trap_code( const SIGCONTEXT
*sigcontext
)
504 return TRAP_sig(sigcontext
);
506 return TRAP_x86_UNKNOWN
; /* unknown trap code */
510 /***********************************************************************
513 * Get the error code for a signal.
515 static inline WORD
get_error_code( const SIGCONTEXT
*sigcontext
)
518 return ERROR_sig(sigcontext
);
524 /***********************************************************************
527 * Get the base of the signal stack for the current thread.
529 static inline void *get_signal_stack(void)
531 return (char *)NtCurrentTeb() + 4096;
535 /***********************************************************************
538 * Get the current teb based on the stack pointer.
540 static inline TEB
*get_current_teb(void)
543 __asm__("movl %%esp,%0" : "=g" (esp
) );
544 return (TEB
*)(esp
& ~signal_stack_mask
);
548 /*******************************************************************
551 * Handler for exceptions happening inside a handler.
553 static DWORD
raise_handler( EXCEPTION_RECORD
*rec
, EXCEPTION_REGISTRATION_RECORD
*frame
,
554 CONTEXT
*context
, EXCEPTION_REGISTRATION_RECORD
**dispatcher
)
556 if (rec
->ExceptionFlags
& (EH_UNWINDING
| EH_EXIT_UNWIND
))
557 return ExceptionContinueSearch
;
558 /* We shouldn't get here so we store faulty frame in dispatcher */
559 *dispatcher
= ((EXC_NESTED_FRAME
*)frame
)->prevFrame
;
560 return ExceptionNestedException
;
564 /*******************************************************************
567 * Handler for exceptions happening inside an unwind handler.
569 static DWORD
unwind_handler( EXCEPTION_RECORD
*rec
, EXCEPTION_REGISTRATION_RECORD
*frame
,
570 CONTEXT
*context
, EXCEPTION_REGISTRATION_RECORD
**dispatcher
)
572 if (!(rec
->ExceptionFlags
& (EH_UNWINDING
| EH_EXIT_UNWIND
)))
573 return ExceptionContinueSearch
;
574 /* We shouldn't get here so we store faulty frame in dispatcher */
575 *dispatcher
= ((EXC_NESTED_FRAME
*)frame
)->prevFrame
;
576 return ExceptionCollidedUnwind
;
580 /**********************************************************************
581 * call_stack_handlers
583 * Call the stack handlers chain.
585 static NTSTATUS
call_stack_handlers( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
587 EXCEPTION_REGISTRATION_RECORD
*frame
, *dispatch
, *nested_frame
;
590 frame
= NtCurrentTeb()->Tib
.ExceptionList
;
592 while (frame
!= (EXCEPTION_REGISTRATION_RECORD
*)~0UL)
594 /* Check frame address */
595 if (((void*)frame
< NtCurrentTeb()->Tib
.StackLimit
) ||
596 ((void*)(frame
+1) > NtCurrentTeb()->Tib
.StackBase
) ||
597 (ULONG_PTR
)frame
& 3)
599 rec
->ExceptionFlags
|= EH_STACK_INVALID
;
604 TRACE( "calling handler at %p code=%x flags=%x\n",
605 frame
->Handler
, rec
->ExceptionCode
, rec
->ExceptionFlags
);
606 res
= EXC_CallHandler( rec
, frame
, context
, &dispatch
, frame
->Handler
, raise_handler
);
607 TRACE( "handler at %p returned %x\n", frame
->Handler
, res
);
609 if (frame
== nested_frame
)
611 /* no longer nested */
613 rec
->ExceptionFlags
&= ~EH_NESTED_CALL
;
618 case ExceptionContinueExecution
:
619 if (!(rec
->ExceptionFlags
& EH_NONCONTINUABLE
)) return STATUS_SUCCESS
;
620 return STATUS_NONCONTINUABLE_EXCEPTION
;
621 case ExceptionContinueSearch
:
623 case ExceptionNestedException
:
624 if (nested_frame
< dispatch
) nested_frame
= dispatch
;
625 rec
->ExceptionFlags
|= EH_NESTED_CALL
;
628 return STATUS_INVALID_DISPOSITION
;
632 return STATUS_UNHANDLED_EXCEPTION
;
636 /*******************************************************************
639 * Implementation of NtRaiseException.
641 static NTSTATUS
raise_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
, BOOL first_chance
)
649 TRACE( "code=%x flags=%x addr=%p ip=%08x tid=%04x\n",
650 rec
->ExceptionCode
, rec
->ExceptionFlags
, rec
->ExceptionAddress
,
651 context
->Eip
, GetCurrentThreadId() );
652 for (c
= 0; c
< rec
->NumberParameters
; c
++)
653 TRACE( " info[%d]=%08lx\n", c
, rec
->ExceptionInformation
[c
] );
654 if (rec
->ExceptionCode
== EXCEPTION_WINE_STUB
)
656 if (rec
->ExceptionInformation
[1] >> 16)
657 MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
658 rec
->ExceptionAddress
,
659 (char*)rec
->ExceptionInformation
[0], (char*)rec
->ExceptionInformation
[1] );
661 MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
662 rec
->ExceptionAddress
,
663 (char*)rec
->ExceptionInformation
[0], rec
->ExceptionInformation
[1] );
667 TRACE(" eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n",
668 context
->Eax
, context
->Ebx
, context
->Ecx
,
669 context
->Edx
, context
->Esi
, context
->Edi
);
670 TRACE(" ebp=%08x esp=%08x cs=%04x ds=%04x es=%04x fs=%04x gs=%04x flags=%08x\n",
671 context
->Ebp
, context
->Esp
, context
->SegCs
, context
->SegDs
,
672 context
->SegEs
, context
->SegFs
, context
->SegGs
, context
->EFlags
);
674 status
= send_debug_event( rec
, TRUE
, context
);
675 if (status
== DBG_CONTINUE
|| status
== DBG_EXCEPTION_HANDLED
)
676 return STATUS_SUCCESS
;
678 /* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
679 if (rec
->ExceptionCode
== EXCEPTION_BREAKPOINT
) context
->Eip
--;
681 if (call_vectored_handlers( rec
, context
) == EXCEPTION_CONTINUE_EXECUTION
)
682 return STATUS_SUCCESS
;
684 if ((status
= call_stack_handlers( rec
, context
)) != STATUS_UNHANDLED_EXCEPTION
)
688 /* last chance exception */
690 status
= send_debug_event( rec
, FALSE
, context
);
691 if (status
!= DBG_CONTINUE
)
693 if (rec
->ExceptionFlags
& EH_STACK_INVALID
)
694 WINE_ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
695 else if (rec
->ExceptionCode
== STATUS_NONCONTINUABLE_EXCEPTION
)
696 WINE_ERR("Process attempted to continue execution after noncontinuable exception.\n");
698 WINE_ERR("Unhandled exception code %x flags %x addr %p\n",
699 rec
->ExceptionCode
, rec
->ExceptionFlags
, rec
->ExceptionAddress
);
700 NtTerminateProcess( NtCurrentProcess(), 1 );
702 return STATUS_SUCCESS
;
707 /***********************************************************************
710 * Set the register values from a vm86 structure.
712 static void save_vm86_context( CONTEXT
*context
, const struct vm86plus_struct
*vm86
)
714 context
->ContextFlags
= CONTEXT_FULL
;
715 context
->Eax
= vm86
->regs
.eax
;
716 context
->Ebx
= vm86
->regs
.ebx
;
717 context
->Ecx
= vm86
->regs
.ecx
;
718 context
->Edx
= vm86
->regs
.edx
;
719 context
->Esi
= vm86
->regs
.esi
;
720 context
->Edi
= vm86
->regs
.edi
;
721 context
->Esp
= vm86
->regs
.esp
;
722 context
->Ebp
= vm86
->regs
.ebp
;
723 context
->Eip
= vm86
->regs
.eip
;
724 context
->SegCs
= vm86
->regs
.cs
;
725 context
->SegDs
= vm86
->regs
.ds
;
726 context
->SegEs
= vm86
->regs
.es
;
727 context
->SegFs
= vm86
->regs
.fs
;
728 context
->SegGs
= vm86
->regs
.gs
;
729 context
->SegSs
= vm86
->regs
.ss
;
730 context
->EFlags
= vm86
->regs
.eflags
;
734 /***********************************************************************
735 * restore_vm86_context
737 * Build a vm86 structure from the register values.
739 static void restore_vm86_context( const CONTEXT
*context
, struct vm86plus_struct
*vm86
)
741 vm86
->regs
.eax
= context
->Eax
;
742 vm86
->regs
.ebx
= context
->Ebx
;
743 vm86
->regs
.ecx
= context
->Ecx
;
744 vm86
->regs
.edx
= context
->Edx
;
745 vm86
->regs
.esi
= context
->Esi
;
746 vm86
->regs
.edi
= context
->Edi
;
747 vm86
->regs
.esp
= context
->Esp
;
748 vm86
->regs
.ebp
= context
->Ebp
;
749 vm86
->regs
.eip
= context
->Eip
;
750 vm86
->regs
.cs
= context
->SegCs
;
751 vm86
->regs
.ds
= context
->SegDs
;
752 vm86
->regs
.es
= context
->SegEs
;
753 vm86
->regs
.fs
= context
->SegFs
;
754 vm86
->regs
.gs
= context
->SegGs
;
755 vm86
->regs
.ss
= context
->SegSs
;
756 vm86
->regs
.eflags
= context
->EFlags
;
760 /**********************************************************************
761 * merge_vm86_pending_flags
763 * Merges TEB.vm86_ptr and TEB.vm86_pending VIP flags and
764 * raises exception if there are pending events and VIF flag
765 * has been turned on.
767 * Called from __wine_enter_vm86 because vm86_enter
768 * doesn't check for pending events.
770 * Called from raise_vm86_sti_exception to check for
771 * pending events in a signal safe way.
773 static void merge_vm86_pending_flags( EXCEPTION_RECORD
*rec
)
775 BOOL check_pending
= TRUE
;
776 struct vm86plus_struct
*vm86
=
777 (struct vm86plus_struct
*)(ntdll_get_thread_data()->vm86_ptr
);
780 * In order to prevent a race when SIGUSR2 occurs while
781 * we are returning from exception handler, pending events
782 * will be rechecked after each raised exception.
784 while (check_pending
&& get_vm86_teb_info()->vm86_pending
)
786 check_pending
= FALSE
;
787 ntdll_get_thread_data()->vm86_ptr
= NULL
;
790 * If VIF is set, throw exception.
791 * Note that SIGUSR2 may turn VIF flag off so
792 * VIF check must occur only when TEB.vm86_ptr is NULL.
794 if (vm86
->regs
.eflags
& VIF_FLAG
)
797 save_vm86_context( &vcontext
, vm86
);
799 rec
->ExceptionCode
= EXCEPTION_VM86_STI
;
800 rec
->ExceptionFlags
= EXCEPTION_CONTINUABLE
;
801 rec
->ExceptionRecord
= NULL
;
802 rec
->NumberParameters
= 0;
803 rec
->ExceptionAddress
= (LPVOID
)vcontext
.Eip
;
805 vcontext
.EFlags
&= ~VIP_FLAG
;
806 get_vm86_teb_info()->vm86_pending
= 0;
807 raise_exception( rec
, &vcontext
, TRUE
);
809 restore_vm86_context( &vcontext
, vm86
);
810 check_pending
= TRUE
;
813 ntdll_get_thread_data()->vm86_ptr
= vm86
;
817 * Merge VIP flags in a signal safe way. This requires
818 * that the following operation compiles into atomic
821 vm86
->regs
.eflags
|= get_vm86_teb_info()->vm86_pending
;
823 #endif /* __HAVE_VM86 */
828 /* We have to workaround two Solaris breakages:
829 * - Solaris doesn't restore %ds and %es before calling the signal handler so exceptions in 16-bit
831 * - Solaris inserts a libc trampoline to call our handler, but the trampoline expects that registers
832 * are setup correctly. So we need to insert our own trampoline below the libc trampoline to set %gs.
835 extern int sigaction_syscall( int sig
, const struct sigaction
*new, struct sigaction
*old
);
836 __ASM_GLOBAL_FUNC( sigaction_syscall
,
837 "movl $0x62,%eax\n\t"
841 /* assume the same libc handler is used for all signals */
842 static void (*libc_sigacthandler
)( int signal
, siginfo_t
*siginfo
, void *context
);
844 static void wine_sigacthandler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
846 struct ntdll_thread_data
*thread_data
;
848 __asm__
__volatile__("mov %ss,%ax; mov %ax,%ds; mov %ax,%es");
850 thread_data
= (struct ntdll_thread_data
*)get_current_teb()->SystemReserved2
;
851 wine_set_fs( thread_data
->fs
);
852 wine_set_gs( thread_data
->gs
);
854 libc_sigacthandler( signal
, siginfo
, sigcontext
);
857 static int solaris_sigaction( int sig
, const struct sigaction
*new, struct sigaction
*old
)
859 struct sigaction real_act
;
861 if (sigaction( sig
, new, old
) == -1) return -1;
863 /* retrieve the real handler and flags with a direct syscall */
864 sigaction_syscall( sig
, NULL
, &real_act
);
865 libc_sigacthandler
= real_act
.sa_sigaction
;
866 real_act
.sa_sigaction
= wine_sigacthandler
;
867 sigaction_syscall( sig
, &real_act
, NULL
);
870 #define sigaction(sig,new,old) solaris_sigaction(sig,new,old)
874 typedef void (WINAPI
*raise_func
)( EXCEPTION_RECORD
*rec
, CONTEXT
*context
);
877 /***********************************************************************
880 * Handler initialization when the full context is not needed.
881 * Return the stack pointer to use for pushing the exception data.
883 static inline void *init_handler( const SIGCONTEXT
*sigcontext
, WORD
*fs
, WORD
*gs
)
885 TEB
*teb
= get_current_teb();
887 /* get %fs and %gs at time of the fault */
889 *fs
= LOWORD(FS_sig(sigcontext
));
894 *gs
= LOWORD(GS_sig(sigcontext
));
899 #ifndef __sun /* see above for Solaris handling */
901 struct ntdll_thread_data
*thread_data
= (struct ntdll_thread_data
*)teb
->SystemReserved2
;
902 wine_set_fs( thread_data
->fs
);
903 wine_set_gs( thread_data
->gs
);
907 if (!wine_ldt_is_system(CS_sig(sigcontext
)) ||
908 !wine_ldt_is_system(SS_sig(sigcontext
))) /* 16-bit mode */
911 * Win16 or DOS protected mode. Note that during switch
912 * from 16-bit mode to linear mode, CS may be set to system
913 * segment before FS is restored. Fortunately, in this case
914 * SS is still non-system segment. This is why both CS and SS
917 return teb
->WOW32Reserved
;
919 return (void *)(ESP_sig(sigcontext
) & ~3);
923 /***********************************************************************
926 * Save the thread FPU context.
928 static inline void save_fpu( CONTEXT
*context
)
931 context
->ContextFlags
|= CONTEXT_FLOATING_POINT
;
932 __asm__
__volatile__( "fnsave %0; fwait" : "=m" (context
->FloatSave
) );
937 /***********************************************************************
940 * Save the thread FPU extended context.
942 static inline void save_fpux( CONTEXT
*context
)
945 /* we have to enforce alignment by hand */
946 char buffer
[sizeof(XMM_SAVE_AREA32
) + 16];
947 XMM_SAVE_AREA32
*state
= (XMM_SAVE_AREA32
*)(((ULONG_PTR
)buffer
+ 15) & ~15);
949 __asm__
__volatile__( "fxsave %0" : "=m" (*state
) );
950 context
->ContextFlags
|= CONTEXT_EXTENDED_REGISTERS
;
951 memcpy( context
->ExtendedRegisters
, state
, sizeof(*state
) );
956 /***********************************************************************
959 * Restore the FPU context to a sigcontext.
961 static inline void restore_fpu( const CONTEXT
*context
)
963 FLOATING_SAVE_AREA float_status
= context
->FloatSave
;
964 /* reset the current interrupt status */
965 float_status
.StatusWord
&= float_status
.ControlWord
| 0xffffff80;
967 __asm__
__volatile__( "frstor %0; fwait" : : "m" (float_status
) );
968 #endif /* __GNUC__ */
972 /***********************************************************************
975 * Restore the FPU extended context to a sigcontext.
977 static inline void restore_fpux( const CONTEXT
*context
)
980 /* we have to enforce alignment by hand */
981 char buffer
[sizeof(XMM_SAVE_AREA32
) + 16];
982 XMM_SAVE_AREA32
*state
= (XMM_SAVE_AREA32
*)(((ULONG_PTR
)buffer
+ 15) & ~15);
984 memcpy( state
, context
->ExtendedRegisters
, sizeof(*state
) );
985 /* reset the current interrupt status */
986 state
->StatusWord
&= state
->ControlWord
| 0xff80;
987 __asm__
__volatile__( "fxrstor %0" : : "m" (*state
) );
992 /***********************************************************************
995 * Build a standard FPU context from an extended one.
997 static void fpux_to_fpu( FLOATING_SAVE_AREA
*fpu
, const XMM_SAVE_AREA32
*fpux
)
999 unsigned int i
, tag
, stack_top
;
1001 fpu
->ControlWord
= fpux
->ControlWord
| 0xffff0000;
1002 fpu
->StatusWord
= fpux
->StatusWord
| 0xffff0000;
1003 fpu
->ErrorOffset
= fpux
->ErrorOffset
;
1004 fpu
->ErrorSelector
= fpux
->ErrorSelector
| (fpux
->ErrorOpcode
<< 16);
1005 fpu
->DataOffset
= fpux
->DataOffset
;
1006 fpu
->DataSelector
= fpux
->DataSelector
;
1007 fpu
->Cr0NpxState
= fpux
->StatusWord
| 0xffff0000;
1009 stack_top
= (fpux
->StatusWord
>> 11) & 7;
1010 fpu
->TagWord
= 0xffff0000;
1011 for (i
= 0; i
< 8; i
++)
1013 memcpy( &fpu
->RegisterArea
[10 * i
], &fpux
->FloatRegisters
[i
], 10 );
1014 if (!(fpux
->TagWord
& (1 << i
))) tag
= 3; /* empty */
1017 const M128A
*reg
= &fpux
->FloatRegisters
[(i
- stack_top
) & 7];
1018 if ((reg
->High
& 0x7fff) == 0x7fff) /* exponent all ones */
1020 tag
= 2; /* special */
1022 else if (!(reg
->High
& 0x7fff)) /* exponent all zeroes */
1024 if (reg
->Low
) tag
= 2; /* special */
1025 else tag
= 1; /* zero */
1029 if (reg
->Low
>> 63) tag
= 0; /* valid */
1030 else tag
= 2; /* special */
1033 fpu
->TagWord
|= tag
<< (2 * i
);
1038 /***********************************************************************
1041 * Build a context structure from the signal info.
1043 static inline void save_context( CONTEXT
*context
, const SIGCONTEXT
*sigcontext
, WORD fs
, WORD gs
)
1045 struct ntdll_thread_regs
* const regs
= ntdll_get_thread_regs();
1046 FLOATING_SAVE_AREA
*fpu
= FPU_sig(sigcontext
);
1047 XMM_SAVE_AREA32
*fpux
= FPUX_sig(sigcontext
);
1049 memset(context
, 0, sizeof(*context
));
1050 context
->ContextFlags
= CONTEXT_FULL
| CONTEXT_DEBUG_REGISTERS
;
1051 context
->Eax
= EAX_sig(sigcontext
);
1052 context
->Ebx
= EBX_sig(sigcontext
);
1053 context
->Ecx
= ECX_sig(sigcontext
);
1054 context
->Edx
= EDX_sig(sigcontext
);
1055 context
->Esi
= ESI_sig(sigcontext
);
1056 context
->Edi
= EDI_sig(sigcontext
);
1057 context
->Ebp
= EBP_sig(sigcontext
);
1058 context
->EFlags
= EFL_sig(sigcontext
);
1059 context
->Eip
= EIP_sig(sigcontext
);
1060 context
->Esp
= ESP_sig(sigcontext
);
1061 context
->SegCs
= LOWORD(CS_sig(sigcontext
));
1062 context
->SegDs
= LOWORD(DS_sig(sigcontext
));
1063 context
->SegEs
= LOWORD(ES_sig(sigcontext
));
1064 context
->SegFs
= fs
;
1065 context
->SegGs
= gs
;
1066 context
->SegSs
= LOWORD(SS_sig(sigcontext
));
1067 context
->Dr0
= regs
->dr0
;
1068 context
->Dr1
= regs
->dr1
;
1069 context
->Dr2
= regs
->dr2
;
1070 context
->Dr3
= regs
->dr3
;
1071 context
->Dr6
= regs
->dr6
;
1072 context
->Dr7
= regs
->dr7
;
1076 context
->ContextFlags
|= CONTEXT_FLOATING_POINT
;
1077 context
->FloatSave
= *fpu
;
1081 context
->ContextFlags
|= CONTEXT_FLOATING_POINT
| CONTEXT_EXTENDED_REGISTERS
;
1082 memcpy( context
->ExtendedRegisters
, fpux
, sizeof(*fpux
) );
1084 if (!fpu
) fpux_to_fpu( &context
->FloatSave
, fpux
);
1086 if (!fpu
&& !fpux
) save_fpu( context
);
1090 /***********************************************************************
1093 * Restore the signal info from the context.
1095 static inline void restore_context( const CONTEXT
*context
, SIGCONTEXT
*sigcontext
)
1097 struct ntdll_thread_regs
* const regs
= ntdll_get_thread_regs();
1098 FLOATING_SAVE_AREA
*fpu
= FPU_sig(sigcontext
);
1099 XMM_SAVE_AREA32
*fpux
= FPUX_sig(sigcontext
);
1101 regs
->dr0
= context
->Dr0
;
1102 regs
->dr1
= context
->Dr1
;
1103 regs
->dr2
= context
->Dr2
;
1104 regs
->dr3
= context
->Dr3
;
1105 regs
->dr6
= context
->Dr6
;
1106 regs
->dr7
= context
->Dr7
;
1107 EAX_sig(sigcontext
) = context
->Eax
;
1108 EBX_sig(sigcontext
) = context
->Ebx
;
1109 ECX_sig(sigcontext
) = context
->Ecx
;
1110 EDX_sig(sigcontext
) = context
->Edx
;
1111 ESI_sig(sigcontext
) = context
->Esi
;
1112 EDI_sig(sigcontext
) = context
->Edi
;
1113 EBP_sig(sigcontext
) = context
->Ebp
;
1114 EFL_sig(sigcontext
) = context
->EFlags
;
1115 EIP_sig(sigcontext
) = context
->Eip
;
1116 ESP_sig(sigcontext
) = context
->Esp
;
1117 CS_sig(sigcontext
) = context
->SegCs
;
1118 DS_sig(sigcontext
) = context
->SegDs
;
1119 ES_sig(sigcontext
) = context
->SegEs
;
1120 SS_sig(sigcontext
) = context
->SegSs
;
1122 GS_sig(sigcontext
) = context
->SegGs
;
1124 wine_set_gs( context
->SegGs
);
1127 FS_sig(sigcontext
) = context
->SegFs
;
1129 wine_set_fs( context
->SegFs
);
1132 if (fpu
) *fpu
= context
->FloatSave
;
1133 if (fpux
) memcpy( fpux
, context
->ExtendedRegisters
, sizeof(*fpux
) );
1134 if (!fpu
&& !fpux
) restore_fpu( context
);
1138 /***********************************************************************
1139 * RtlCaptureContext (NTDLL.@)
1141 void WINAPI
__regs_RtlCaptureContext( CONTEXT
*context
, CONTEXT
*regs
)
1144 if (fpux_support
) save_fpux( context
);
1145 else save_fpu( context
);
1147 DEFINE_REGS_ENTRYPOINT( RtlCaptureContext
, 1 )
1150 /***********************************************************************
1153 * Set the new CPU context. Used by NtSetContextThread.
1155 void set_cpu_context( const CONTEXT
*context
)
1157 DWORD flags
= context
->ContextFlags
& ~CONTEXT_i386
;
1159 if ((flags
& CONTEXT_EXTENDED_REGISTERS
) && fpux_support
) restore_fpux( context
);
1160 else if (flags
& CONTEXT_FLOATING_POINT
) restore_fpu( context
);
1162 if (flags
& CONTEXT_DEBUG_REGISTERS
)
1164 struct ntdll_thread_regs
* const regs
= ntdll_get_thread_regs();
1165 regs
->dr0
= context
->Dr0
;
1166 regs
->dr1
= context
->Dr1
;
1167 regs
->dr2
= context
->Dr2
;
1168 regs
->dr3
= context
->Dr3
;
1169 regs
->dr6
= context
->Dr6
;
1170 regs
->dr7
= context
->Dr7
;
1172 if (flags
& CONTEXT_FULL
)
1174 if (!(flags
& CONTEXT_CONTROL
))
1175 FIXME( "setting partial context (%x) not supported\n", flags
);
1176 else if (flags
& CONTEXT_SEGMENTS
)
1177 __wine_call_from_32_restore_regs( context
);
1180 CONTEXT newcontext
= *context
;
1181 newcontext
.SegDs
= wine_get_ds();
1182 newcontext
.SegEs
= wine_get_es();
1183 newcontext
.SegFs
= wine_get_fs();
1184 newcontext
.SegGs
= wine_get_gs();
1185 __wine_call_from_32_restore_regs( &newcontext
);
1191 /***********************************************************************
1194 * Copy a register context according to the flags.
1196 void copy_context( CONTEXT
*to
, const CONTEXT
*from
, DWORD flags
)
1198 flags
&= ~CONTEXT_i386
; /* get rid of CPU id */
1199 if (flags
& CONTEXT_INTEGER
)
1201 to
->Eax
= from
->Eax
;
1202 to
->Ebx
= from
->Ebx
;
1203 to
->Ecx
= from
->Ecx
;
1204 to
->Edx
= from
->Edx
;
1205 to
->Esi
= from
->Esi
;
1206 to
->Edi
= from
->Edi
;
1208 if (flags
& CONTEXT_CONTROL
)
1210 to
->Ebp
= from
->Ebp
;
1211 to
->Esp
= from
->Esp
;
1212 to
->Eip
= from
->Eip
;
1213 to
->SegCs
= from
->SegCs
;
1214 to
->SegSs
= from
->SegSs
;
1215 to
->EFlags
= from
->EFlags
;
1217 if (flags
& CONTEXT_SEGMENTS
)
1219 to
->SegDs
= from
->SegDs
;
1220 to
->SegEs
= from
->SegEs
;
1221 to
->SegFs
= from
->SegFs
;
1222 to
->SegGs
= from
->SegGs
;
1224 if (flags
& CONTEXT_DEBUG_REGISTERS
)
1226 to
->Dr0
= from
->Dr0
;
1227 to
->Dr1
= from
->Dr1
;
1228 to
->Dr2
= from
->Dr2
;
1229 to
->Dr3
= from
->Dr3
;
1230 to
->Dr6
= from
->Dr6
;
1231 to
->Dr7
= from
->Dr7
;
1233 if (flags
& CONTEXT_FLOATING_POINT
)
1235 to
->FloatSave
= from
->FloatSave
;
1237 if (flags
& CONTEXT_EXTENDED_REGISTERS
)
1239 memcpy( to
->ExtendedRegisters
, from
->ExtendedRegisters
, sizeof(to
->ExtendedRegisters
) );
1244 /***********************************************************************
1247 * Convert a register context to the server format.
1249 NTSTATUS
context_to_server( context_t
*to
, const CONTEXT
*from
)
1251 DWORD flags
= from
->ContextFlags
& ~CONTEXT_i386
; /* get rid of CPU id */
1253 memset( to
, 0, sizeof(*to
) );
1256 if (flags
& CONTEXT_CONTROL
)
1258 to
->flags
|= SERVER_CTX_CONTROL
;
1259 to
->ctl
.i386_regs
.ebp
= from
->Ebp
;
1260 to
->ctl
.i386_regs
.esp
= from
->Esp
;
1261 to
->ctl
.i386_regs
.eip
= from
->Eip
;
1262 to
->ctl
.i386_regs
.cs
= from
->SegCs
;
1263 to
->ctl
.i386_regs
.ss
= from
->SegSs
;
1264 to
->ctl
.i386_regs
.eflags
= from
->EFlags
;
1266 if (flags
& CONTEXT_INTEGER
)
1268 to
->flags
|= SERVER_CTX_INTEGER
;
1269 to
->integer
.i386_regs
.eax
= from
->Eax
;
1270 to
->integer
.i386_regs
.ebx
= from
->Ebx
;
1271 to
->integer
.i386_regs
.ecx
= from
->Ecx
;
1272 to
->integer
.i386_regs
.edx
= from
->Edx
;
1273 to
->integer
.i386_regs
.esi
= from
->Esi
;
1274 to
->integer
.i386_regs
.edi
= from
->Edi
;
1276 if (flags
& CONTEXT_SEGMENTS
)
1278 to
->flags
|= SERVER_CTX_SEGMENTS
;
1279 to
->seg
.i386_regs
.ds
= from
->SegDs
;
1280 to
->seg
.i386_regs
.es
= from
->SegEs
;
1281 to
->seg
.i386_regs
.fs
= from
->SegFs
;
1282 to
->seg
.i386_regs
.gs
= from
->SegGs
;
1284 if (flags
& CONTEXT_FLOATING_POINT
)
1286 to
->flags
|= SERVER_CTX_FLOATING_POINT
;
1287 to
->fp
.i386_regs
.ctrl
= from
->FloatSave
.ControlWord
;
1288 to
->fp
.i386_regs
.status
= from
->FloatSave
.StatusWord
;
1289 to
->fp
.i386_regs
.tag
= from
->FloatSave
.TagWord
;
1290 to
->fp
.i386_regs
.err_off
= from
->FloatSave
.ErrorOffset
;
1291 to
->fp
.i386_regs
.err_sel
= from
->FloatSave
.ErrorSelector
;
1292 to
->fp
.i386_regs
.data_off
= from
->FloatSave
.DataOffset
;
1293 to
->fp
.i386_regs
.data_sel
= from
->FloatSave
.DataSelector
;
1294 to
->fp
.i386_regs
.cr0npx
= from
->FloatSave
.Cr0NpxState
;
1295 memcpy( to
->fp
.i386_regs
.regs
, from
->FloatSave
.RegisterArea
, sizeof(to
->fp
.i386_regs
.regs
) );
1297 if (flags
& CONTEXT_DEBUG_REGISTERS
)
1299 to
->flags
|= SERVER_CTX_DEBUG_REGISTERS
;
1300 to
->debug
.i386_regs
.dr0
= from
->Dr0
;
1301 to
->debug
.i386_regs
.dr1
= from
->Dr1
;
1302 to
->debug
.i386_regs
.dr2
= from
->Dr2
;
1303 to
->debug
.i386_regs
.dr3
= from
->Dr3
;
1304 to
->debug
.i386_regs
.dr6
= from
->Dr6
;
1305 to
->debug
.i386_regs
.dr7
= from
->Dr7
;
1307 if (flags
& CONTEXT_EXTENDED_REGISTERS
)
1309 to
->flags
|= SERVER_CTX_EXTENDED_REGISTERS
;
1310 memcpy( to
->ext
.i386_regs
, from
->ExtendedRegisters
, sizeof(to
->ext
.i386_regs
) );
1312 return STATUS_SUCCESS
;
1316 /***********************************************************************
1317 * context_from_server
1319 * Convert a register context from the server format.
1321 NTSTATUS
context_from_server( CONTEXT
*to
, const context_t
*from
)
1323 if (from
->cpu
!= CPU_x86
) return STATUS_INVALID_PARAMETER
;
1325 to
->ContextFlags
= CONTEXT_i386
;
1326 if (from
->flags
& SERVER_CTX_CONTROL
)
1328 to
->ContextFlags
|= CONTEXT_CONTROL
;
1329 to
->Ebp
= from
->ctl
.i386_regs
.ebp
;
1330 to
->Esp
= from
->ctl
.i386_regs
.esp
;
1331 to
->Eip
= from
->ctl
.i386_regs
.eip
;
1332 to
->SegCs
= from
->ctl
.i386_regs
.cs
;
1333 to
->SegSs
= from
->ctl
.i386_regs
.ss
;
1334 to
->EFlags
= from
->ctl
.i386_regs
.eflags
;
1336 if (from
->flags
& SERVER_CTX_INTEGER
)
1338 to
->ContextFlags
|= CONTEXT_INTEGER
;
1339 to
->Eax
= from
->integer
.i386_regs
.eax
;
1340 to
->Ebx
= from
->integer
.i386_regs
.ebx
;
1341 to
->Ecx
= from
->integer
.i386_regs
.ecx
;
1342 to
->Edx
= from
->integer
.i386_regs
.edx
;
1343 to
->Esi
= from
->integer
.i386_regs
.esi
;
1344 to
->Edi
= from
->integer
.i386_regs
.edi
;
1346 if (from
->flags
& SERVER_CTX_SEGMENTS
)
1348 to
->ContextFlags
|= CONTEXT_SEGMENTS
;
1349 to
->SegDs
= from
->seg
.i386_regs
.ds
;
1350 to
->SegEs
= from
->seg
.i386_regs
.es
;
1351 to
->SegFs
= from
->seg
.i386_regs
.fs
;
1352 to
->SegGs
= from
->seg
.i386_regs
.gs
;
1354 if (from
->flags
& SERVER_CTX_FLOATING_POINT
)
1356 to
->ContextFlags
|= CONTEXT_FLOATING_POINT
;
1357 to
->FloatSave
.ControlWord
= from
->fp
.i386_regs
.ctrl
;
1358 to
->FloatSave
.StatusWord
= from
->fp
.i386_regs
.status
;
1359 to
->FloatSave
.TagWord
= from
->fp
.i386_regs
.tag
;
1360 to
->FloatSave
.ErrorOffset
= from
->fp
.i386_regs
.err_off
;
1361 to
->FloatSave
.ErrorSelector
= from
->fp
.i386_regs
.err_sel
;
1362 to
->FloatSave
.DataOffset
= from
->fp
.i386_regs
.data_off
;
1363 to
->FloatSave
.DataSelector
= from
->fp
.i386_regs
.data_sel
;
1364 to
->FloatSave
.Cr0NpxState
= from
->fp
.i386_regs
.cr0npx
;
1365 memcpy( to
->FloatSave
.RegisterArea
, from
->fp
.i386_regs
.regs
, sizeof(to
->FloatSave
.RegisterArea
) );
1367 if (from
->flags
& SERVER_CTX_DEBUG_REGISTERS
)
1369 to
->ContextFlags
|= CONTEXT_DEBUG_REGISTERS
;
1370 to
->Dr0
= from
->debug
.i386_regs
.dr0
;
1371 to
->Dr1
= from
->debug
.i386_regs
.dr1
;
1372 to
->Dr2
= from
->debug
.i386_regs
.dr2
;
1373 to
->Dr3
= from
->debug
.i386_regs
.dr3
;
1374 to
->Dr6
= from
->debug
.i386_regs
.dr6
;
1375 to
->Dr7
= from
->debug
.i386_regs
.dr7
;
1377 if (from
->flags
& SERVER_CTX_EXTENDED_REGISTERS
)
1379 to
->ContextFlags
|= CONTEXT_EXTENDED_REGISTERS
;
1380 memcpy( to
->ExtendedRegisters
, from
->ext
.i386_regs
, sizeof(to
->ExtendedRegisters
) );
1382 return STATUS_SUCCESS
;
1386 /***********************************************************************
1387 * is_privileged_instr
1389 * Check if the fault location is a privileged instruction.
1390 * Based on the instruction emulation code in dlls/kernel/instr.c.
1392 static inline DWORD
is_privileged_instr( CONTEXT86
*context
)
1395 unsigned int prefix_count
= 0;
1397 if (!wine_ldt_is_system( context
->SegCs
)) return 0;
1398 instr
= (BYTE
*)context
->Eip
;
1400 for (;;) switch(*instr
)
1402 /* instruction prefixes */
1403 case 0x2e: /* %cs: */
1404 case 0x36: /* %ss: */
1405 case 0x3e: /* %ds: */
1406 case 0x26: /* %es: */
1407 case 0x64: /* %fs: */
1408 case 0x65: /* %gs: */
1409 case 0x66: /* opcode size */
1410 case 0x67: /* addr size */
1411 case 0xf0: /* lock */
1412 case 0xf2: /* repne */
1413 case 0xf3: /* repe */
1414 if (++prefix_count
>= 15) return EXCEPTION_ILLEGAL_INSTRUCTION
;
1418 case 0x0f: /* extended instruction */
1421 case 0x20: /* mov crX, reg */
1422 case 0x21: /* mov drX, reg */
1423 case 0x22: /* mov reg, crX */
1424 case 0x23: /* mov reg drX */
1425 return EXCEPTION_PRIV_INSTRUCTION
;
1428 case 0x6c: /* insb (%dx) */
1429 case 0x6d: /* insl (%dx) */
1430 case 0x6e: /* outsb (%dx) */
1431 case 0x6f: /* outsl (%dx) */
1432 case 0xcd: /* int $xx */
1433 case 0xe4: /* inb al,XX */
1434 case 0xe5: /* in (e)ax,XX */
1435 case 0xe6: /* outb XX,al */
1436 case 0xe7: /* out XX,(e)ax */
1437 case 0xec: /* inb (%dx),%al */
1438 case 0xed: /* inl (%dx),%eax */
1439 case 0xee: /* outb %al,(%dx) */
1440 case 0xef: /* outl %eax,(%dx) */
1441 case 0xf4: /* hlt */
1442 case 0xfa: /* cli */
1443 case 0xfb: /* sti */
1444 return EXCEPTION_PRIV_INSTRUCTION
;
1451 #include "pshpack1.h"
1454 DWORD movl
; /* movl this,4(%esp) */
1456 BYTE jmp
; /* jmp func */
1459 #include "poppack.h"
1461 /**********************************************************************
1464 * Check if code destination is an ATL thunk, and emulate it if so.
1466 static BOOL
check_atl_thunk( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1468 const struct atl_thunk
*thunk
= (const struct atl_thunk
*)rec
->ExceptionInformation
[1];
1473 if (thunk
->movl
== 0x042444c7 && thunk
->jmp
== 0xe9)
1475 *((DWORD
*)context
->Esp
+ 1) = thunk
->this;
1476 context
->Eip
= (DWORD_PTR
)(&thunk
->func
+ 1) + thunk
->func
;
1477 TRACE( "emulating ATL thunk at %p, func=%08x arg=%08x\n",
1478 thunk
, context
->Eip
, *((DWORD
*)context
->Esp
+ 1) );
1491 /***********************************************************************
1492 * setup_exception_record
1494 * Setup the exception record and context on the thread stack.
1496 static EXCEPTION_RECORD
*setup_exception_record( SIGCONTEXT
*sigcontext
, void *stack_ptr
,
1497 WORD fs
, WORD gs
, raise_func func
)
1501 void *ret_addr
; /* return address from raise_func */
1502 EXCEPTION_RECORD
*rec_ptr
; /* first arg for raise_func */
1503 CONTEXT
*context_ptr
; /* second arg for raise_func */
1505 EXCEPTION_RECORD rec
;
1508 } *stack
= stack_ptr
;
1509 DWORD exception_code
= 0;
1511 /* stack sanity checks */
1513 if ((char *)stack
>= (char *)get_signal_stack() &&
1514 (char *)stack
< (char *)get_signal_stack() + signal_stack_size
)
1516 WINE_ERR( "nested exception on signal stack in thread %04x eip %08x esp %08x stack %p-%p\n",
1517 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1518 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->Tib
.StackLimit
,
1519 NtCurrentTeb()->Tib
.StackBase
);
1523 if (stack
- 1 > stack
|| /* check for overflow in subtraction */
1524 (char *)stack
<= (char *)NtCurrentTeb()->DeallocationStack
||
1525 (char *)stack
> (char *)NtCurrentTeb()->Tib
.StackBase
)
1527 WARN( "exception outside of stack limits in thread %04x eip %08x esp %08x stack %p-%p\n",
1528 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1529 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->Tib
.StackLimit
,
1530 NtCurrentTeb()->Tib
.StackBase
);
1532 else if ((char *)(stack
- 1) < (char *)NtCurrentTeb()->DeallocationStack
+ 4096)
1534 /* stack overflow on last page, unrecoverable */
1535 UINT diff
= (char *)NtCurrentTeb()->DeallocationStack
+ 4096 - (char *)(stack
- 1);
1536 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1537 diff
, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1538 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->DeallocationStack
,
1539 NtCurrentTeb()->Tib
.StackLimit
, NtCurrentTeb()->Tib
.StackBase
);
1542 else if ((char *)(stack
- 1) < (char *)NtCurrentTeb()->Tib
.StackLimit
)
1544 /* stack access below stack limit, may be recoverable */
1545 if (virtual_handle_stack_fault( stack
- 1 )) exception_code
= EXCEPTION_STACK_OVERFLOW
;
1548 UINT diff
= (char *)NtCurrentTeb()->Tib
.StackLimit
- (char *)(stack
- 1);
1549 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1550 diff
, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1551 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->DeallocationStack
,
1552 NtCurrentTeb()->Tib
.StackLimit
, NtCurrentTeb()->Tib
.StackBase
);
1557 stack
--; /* push the stack_layout structure */
1558 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
1559 VALGRIND_MAKE_MEM_UNDEFINED(stack
, sizeof(*stack
));
1560 #elif defined(VALGRIND_MAKE_WRITABLE)
1561 VALGRIND_MAKE_WRITABLE(stack
, sizeof(*stack
));
1563 stack
->ret_addr
= (void *)0xdeadbabe; /* raise_func must not return */
1564 stack
->rec_ptr
= &stack
->rec
;
1565 stack
->context_ptr
= &stack
->context
;
1567 stack
->rec
.ExceptionRecord
= NULL
;
1568 stack
->rec
.ExceptionCode
= exception_code
;
1569 stack
->rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
1570 stack
->rec
.ExceptionAddress
= (LPVOID
)EIP_sig(sigcontext
);
1571 stack
->rec
.NumberParameters
= 0;
1573 save_context( &stack
->context
, sigcontext
, fs
, gs
);
1575 /* now modify the sigcontext to return to the raise function */
1576 ESP_sig(sigcontext
) = (DWORD
)stack
;
1577 EIP_sig(sigcontext
) = (DWORD
)func
;
1578 /* clear single-step, direction, and align check flag */
1579 EFL_sig(sigcontext
) &= ~(0x100|0x400|0x40000);
1580 CS_sig(sigcontext
) = wine_get_cs();
1581 DS_sig(sigcontext
) = wine_get_ds();
1582 ES_sig(sigcontext
) = wine_get_es();
1583 FS_sig(sigcontext
) = wine_get_fs();
1584 GS_sig(sigcontext
) = wine_get_gs();
1585 SS_sig(sigcontext
) = wine_get_ss();
1587 return stack
->rec_ptr
;
1591 /***********************************************************************
1594 * Setup a proper stack frame for the raise function, and modify the
1595 * sigcontext so that the return from the signal handler will call
1596 * the raise function.
1598 static EXCEPTION_RECORD
*setup_exception( SIGCONTEXT
*sigcontext
, raise_func func
)
1601 void *stack
= init_handler( sigcontext
, &fs
, &gs
);
1603 return setup_exception_record( sigcontext
, stack
, fs
, gs
, func
);
1607 /***********************************************************************
1608 * get_exception_context
1610 * Get a pointer to the context built by setup_exception.
1612 static inline CONTEXT
*get_exception_context( EXCEPTION_RECORD
*rec
)
1614 return (CONTEXT
*)rec
- 1; /* cf. stack_layout structure */
1618 /**********************************************************************
1621 * Get the FPU exception code from the FPU status.
1623 static inline DWORD
get_fpu_code( const CONTEXT
*context
)
1625 DWORD status
= context
->FloatSave
.StatusWord
& ~(context
->FloatSave
.ControlWord
& 0x3f);
1627 if (status
& 0x01) /* IE */
1629 if (status
& 0x40) /* SF */
1630 return EXCEPTION_FLT_STACK_CHECK
;
1632 return EXCEPTION_FLT_INVALID_OPERATION
;
1634 if (status
& 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND
; /* DE flag */
1635 if (status
& 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO
; /* ZE flag */
1636 if (status
& 0x08) return EXCEPTION_FLT_OVERFLOW
; /* OE flag */
1637 if (status
& 0x10) return EXCEPTION_FLT_UNDERFLOW
; /* UE flag */
1638 if (status
& 0x20) return EXCEPTION_FLT_INEXACT_RESULT
; /* PE flag */
1639 return EXCEPTION_FLT_INVALID_OPERATION
; /* generic error */
1643 /**********************************************************************
1644 * raise_segv_exception
1646 static void WINAPI
raise_segv_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1650 switch(rec
->ExceptionCode
)
1652 case EXCEPTION_ACCESS_VIOLATION
:
1653 if (rec
->NumberParameters
== 2)
1655 if (rec
->ExceptionInformation
[0] == EXCEPTION_EXECUTE_FAULT
&& check_atl_thunk( rec
, context
))
1657 if (!(rec
->ExceptionCode
= virtual_handle_fault( (void *)rec
->ExceptionInformation
[1],
1658 rec
->ExceptionInformation
[0] )))
1662 case EXCEPTION_DATATYPE_MISALIGNMENT
:
1663 /* FIXME: pass through exception handler first? */
1664 if (context
->EFlags
& 0x00040000)
1666 /* Disable AC flag, return */
1667 context
->EFlags
&= ~0x00040000;
1672 status
= NtRaiseException( rec
, context
, TRUE
);
1673 if (status
) raise_status( status
, rec
);
1675 NtSetContextThread( GetCurrentThread(), context
);
1679 /**********************************************************************
1680 * raise_trap_exception
1682 static void WINAPI
raise_trap_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1686 if (rec
->ExceptionCode
== EXCEPTION_SINGLE_STEP
)
1688 struct ntdll_thread_regs
* const regs
= ntdll_get_thread_regs();
1690 /* when single stepping can't tell whether this is a hw bp or a
1691 * single step interrupt. try to avoid as much overhead as possible
1692 * and only do a server call if there is any hw bp enabled. */
1694 if( !(context
->EFlags
& 0x100) || (regs
->dr7
& 0xff) )
1696 /* (possible) hardware breakpoint, fetch the debug registers */
1697 context
->ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
1698 NtGetContextThread(GetCurrentThread(), context
);
1699 context
->ContextFlags
|= CONTEXT_FULL
; /* restore flags */
1702 context
->EFlags
&= ~0x100; /* clear single-step flag */
1705 status
= NtRaiseException( rec
, context
, TRUE
);
1706 if (status
) raise_status( status
, rec
);
1710 /**********************************************************************
1711 * raise_generic_exception
1713 * Generic raise function for exceptions that don't need special treatment.
1715 static void WINAPI
raise_generic_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1719 status
= NtRaiseException( rec
, context
, TRUE
);
1720 if (status
) raise_status( status
, rec
);
1725 /**********************************************************************
1726 * raise_vm86_sti_exception
1728 static void WINAPI
raise_vm86_sti_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1730 /* merge_vm86_pending_flags merges the vm86_pending flag in safely */
1731 get_vm86_teb_info()->vm86_pending
|= VIP_FLAG
;
1733 if (ntdll_get_thread_data()->vm86_ptr
)
1735 if (((char*)context
->Eip
>= (char*)vm86_return
) &&
1736 ((char*)context
->Eip
<= (char*)vm86_return_end
) &&
1737 (VM86_TYPE(context
->Eax
) != VM86_SIGNAL
)) {
1738 /* exiting from VM86, can't throw */
1741 merge_vm86_pending_flags( rec
);
1743 else if (get_vm86_teb_info()->dpmi_vif
&&
1744 !wine_ldt_is_system(context
->SegCs
) &&
1745 !wine_ldt_is_system(context
->SegSs
))
1747 /* Executing DPMI code and virtual interrupts are enabled. */
1748 get_vm86_teb_info()->vm86_pending
= 0;
1749 NtRaiseException( rec
, context
, TRUE
);
1752 NtSetContextThread( GetCurrentThread(), context
);
1756 /**********************************************************************
1759 * Handler for SIGUSR2.
1760 * We use it to signal that the running __wine_enter_vm86() should
1761 * immediately set VIP_FLAG, causing pending events to be handled
1762 * as early as possible.
1764 static void usr2_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1766 EXCEPTION_RECORD
*rec
= setup_exception( sigcontext
, raise_vm86_sti_exception
);
1767 rec
->ExceptionCode
= EXCEPTION_VM86_STI
;
1769 #endif /* __HAVE_VM86 */
1772 /**********************************************************************
1775 * Handler for SIGSEGV and related errors.
1777 static void segv_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1780 EXCEPTION_RECORD
*rec
;
1781 SIGCONTEXT
*context
= sigcontext
;
1782 void *stack
= init_handler( sigcontext
, &fs
, &gs
);
1784 /* check for page fault inside the thread stack */
1785 if (get_trap_code(context
) == TRAP_x86_PAGEFLT
&&
1786 (char *)siginfo
->si_addr
>= (char *)NtCurrentTeb()->DeallocationStack
&&
1787 (char *)siginfo
->si_addr
< (char *)NtCurrentTeb()->Tib
.StackBase
&&
1788 virtual_handle_stack_fault( siginfo
->si_addr
))
1790 /* check if this was the last guard page */
1791 if ((char *)siginfo
->si_addr
< (char *)NtCurrentTeb()->DeallocationStack
+ 2*4096)
1793 rec
= setup_exception_record( context
, stack
, fs
, gs
, raise_segv_exception
);
1794 rec
->ExceptionCode
= EXCEPTION_STACK_OVERFLOW
;
1799 rec
= setup_exception_record( context
, stack
, fs
, gs
, raise_segv_exception
);
1800 if (rec
->ExceptionCode
== EXCEPTION_STACK_OVERFLOW
) return;
1802 switch(get_trap_code(context
))
1804 case TRAP_x86_OFLOW
: /* Overflow exception */
1805 rec
->ExceptionCode
= EXCEPTION_INT_OVERFLOW
;
1807 case TRAP_x86_BOUND
: /* Bound range exception */
1808 rec
->ExceptionCode
= EXCEPTION_ARRAY_BOUNDS_EXCEEDED
;
1810 case TRAP_x86_PRIVINFLT
: /* Invalid opcode exception */
1811 rec
->ExceptionCode
= EXCEPTION_ILLEGAL_INSTRUCTION
;
1813 case TRAP_x86_STKFLT
: /* Stack fault */
1814 rec
->ExceptionCode
= EXCEPTION_STACK_OVERFLOW
;
1816 case TRAP_x86_SEGNPFLT
: /* Segment not present exception */
1817 case TRAP_x86_PROTFLT
: /* General protection fault */
1818 case TRAP_x86_UNKNOWN
: /* Unknown fault code */
1820 WORD err
= get_error_code(context
);
1821 if (!err
&& (rec
->ExceptionCode
= is_privileged_instr( get_exception_context(rec
) ))) break;
1822 rec
->ExceptionCode
= EXCEPTION_ACCESS_VIOLATION
;
1823 rec
->NumberParameters
= 2;
1824 rec
->ExceptionInformation
[0] = 0;
1825 /* if error contains a LDT selector, use that as fault address */
1826 if ((err
& 7) == 4 && !wine_ldt_is_system( err
| 7 ))
1827 rec
->ExceptionInformation
[1] = err
& ~7;
1829 rec
->ExceptionInformation
[1] = 0xffffffff;
1832 case TRAP_x86_PAGEFLT
: /* Page fault */
1833 rec
->ExceptionCode
= EXCEPTION_ACCESS_VIOLATION
;
1834 rec
->NumberParameters
= 2;
1835 rec
->ExceptionInformation
[0] = (get_error_code(context
) >> 1) & 0x09;
1836 /* Send code 8 (EXCEPTION_EXECUTE_FAULT) only if data execution
1837 prevention is enabled */
1838 if (rec
->ExceptionInformation
[0] & 8)
1841 NtQueryInformationProcess( GetCurrentProcess(), ProcessExecuteFlags
,
1842 &flags
, sizeof(flags
), NULL
);
1843 if (!(flags
& MEM_EXECUTE_OPTION_DISABLE
)) rec
->ExceptionInformation
[0] &= 1;
1845 rec
->ExceptionInformation
[1] = (ULONG_PTR
)siginfo
->si_addr
;
1847 case TRAP_x86_ALIGNFLT
: /* Alignment check exception */
1848 rec
->ExceptionCode
= EXCEPTION_DATATYPE_MISALIGNMENT
;
1851 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context
) );
1853 case TRAP_x86_NMI
: /* NMI interrupt */
1854 case TRAP_x86_DNA
: /* Device not available exception */
1855 case TRAP_x86_DOUBLEFLT
: /* Double fault exception */
1856 case TRAP_x86_TSSFLT
: /* Invalid TSS exception */
1857 case TRAP_x86_MCHK
: /* Machine check exception */
1858 case TRAP_x86_CACHEFLT
: /* Cache flush exception */
1859 rec
->ExceptionCode
= EXCEPTION_ILLEGAL_INSTRUCTION
;
1865 /**********************************************************************
1868 * Handler for SIGTRAP.
1870 static void trap_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1872 SIGCONTEXT
*context
= sigcontext
;
1873 EXCEPTION_RECORD
*rec
= setup_exception( context
, raise_trap_exception
);
1875 switch(get_trap_code(context
))
1877 case TRAP_x86_TRCTRAP
: /* Single-step exception */
1878 rec
->ExceptionCode
= EXCEPTION_SINGLE_STEP
;
1880 case TRAP_x86_BPTFLT
: /* Breakpoint exception */
1881 rec
->ExceptionAddress
= (char *)rec
->ExceptionAddress
- 1; /* back up over the int3 instruction */
1884 rec
->ExceptionCode
= EXCEPTION_BREAKPOINT
;
1890 /**********************************************************************
1893 * Handler for SIGFPE.
1895 static void fpe_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1897 CONTEXT
*win_context
;
1898 SIGCONTEXT
*context
= sigcontext
;
1899 EXCEPTION_RECORD
*rec
= setup_exception( context
, raise_generic_exception
);
1901 win_context
= get_exception_context( rec
);
1903 switch(get_trap_code(context
))
1905 case TRAP_x86_DIVIDE
: /* Division by zero exception */
1906 rec
->ExceptionCode
= EXCEPTION_INT_DIVIDE_BY_ZERO
;
1908 case TRAP_x86_FPOPFLT
: /* Coprocessor segment overrun */
1909 rec
->ExceptionCode
= EXCEPTION_FLT_INVALID_OPERATION
;
1911 case TRAP_x86_ARITHTRAP
: /* Floating point exception */
1912 case TRAP_x86_UNKNOWN
: /* Unknown fault code */
1913 rec
->ExceptionCode
= get_fpu_code( win_context
);
1914 rec
->ExceptionAddress
= (LPVOID
)win_context
->FloatSave
.ErrorOffset
;
1916 case TRAP_x86_CACHEFLT
: /* SIMD exception */
1918 * Behaviour only tested for divide-by-zero exceptions
1919 * Check for other SIMD exceptions as well */
1920 if(siginfo
->si_code
!= FPE_FLTDIV
)
1921 FIXME("untested SIMD exception: %#x. Might not work correctly\n",
1924 rec
->ExceptionCode
= STATUS_FLOAT_MULTIPLE_TRAPS
;
1925 rec
->NumberParameters
= 1;
1926 /* no idea what meaning is actually behind this but that's what native does */
1927 rec
->ExceptionInformation
[0] = 0;
1930 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context
) );
1931 rec
->ExceptionCode
= EXCEPTION_FLT_INVALID_OPERATION
;
1937 /**********************************************************************
1940 * Handler for SIGINT.
1942 * FIXME: should not be calling external functions on the signal stack.
1944 static void int_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1947 init_handler( sigcontext
, &fs
, &gs
);
1948 if (!dispatch_signal(SIGINT
))
1950 EXCEPTION_RECORD
*rec
= setup_exception( sigcontext
, raise_generic_exception
);
1951 rec
->ExceptionCode
= CONTROL_C_EXIT
;
1955 /**********************************************************************
1958 * Handler for SIGABRT.
1960 static void abrt_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1962 EXCEPTION_RECORD
*rec
= setup_exception( sigcontext
, raise_generic_exception
);
1963 rec
->ExceptionCode
= EXCEPTION_WINE_ASSERTION
;
1964 rec
->ExceptionFlags
= EH_NONCONTINUABLE
;
1968 /**********************************************************************
1971 * Handler for SIGQUIT.
1973 static void quit_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1976 init_handler( sigcontext
, &fs
, &gs
);
1981 /**********************************************************************
1984 * Handler for SIGUSR1, used to signal a thread that it got suspended.
1986 static void usr1_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1991 init_handler( sigcontext
, &fs
, &gs
);
1992 save_context( &context
, sigcontext
, fs
, gs
);
1993 wait_suspend( &context
);
1994 restore_context( &context
, sigcontext
);
1998 /**********************************************************************
1999 * get_signal_stack_total_size
2001 * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
2002 * Must be a power of two.
2004 size_t get_signal_stack_total_size(void)
2006 if (!signal_stack_size
)
2008 size_t size
= 8192, min_size
= teb_size
+ max( MINSIGSTKSZ
, 8192 );
2009 /* find the first power of two not smaller than min_size */
2010 while (size
< min_size
) size
*= 2;
2011 signal_stack_mask
= size
- 1;
2012 signal_stack_size
= size
- teb_size
;
2014 return signal_stack_size
+ teb_size
;
2018 /***********************************************************************
2019 * __wine_set_signal_handler (NTDLL.@)
2021 int CDECL
__wine_set_signal_handler(unsigned int sig
, wine_signal_handler wsh
)
2023 if (sig
>= sizeof(handlers
) / sizeof(handlers
[0])) return -1;
2024 if (handlers
[sig
] != NULL
) return -2;
2025 handlers
[sig
] = wsh
;
2030 /**********************************************************************
2031 * signal_init_thread
2033 void signal_init_thread( TEB
*teb
)
2035 struct ntdll_thread_data
*thread_data
= (struct ntdll_thread_data
*)teb
->SystemReserved2
;
2040 int mib
[2], val
= 1;
2043 mib
[1] = KERN_THALTSTACK
;
2044 sysctl( mib
, 2, NULL
, NULL
, &val
, sizeof(val
) );
2047 ss
.ss_sp
= (char *)teb
+ teb_size
;
2048 ss
.ss_size
= signal_stack_size
;
2050 if (sigaltstack(&ss
, NULL
) == -1) perror( "sigaltstack" );
2052 wine_ldt_set_base( &fs_entry
, teb
);
2053 wine_ldt_set_limit( &fs_entry
, teb_size
- 1 );
2054 wine_ldt_set_flags( &fs_entry
, WINE_LDT_FLAGS_DATA
|WINE_LDT_FLAGS_32BIT
);
2055 wine_ldt_init_fs( thread_data
->fs
, &fs_entry
);
2056 thread_data
->gs
= wine_get_gs();
2059 /**********************************************************************
2060 * signal_init_process
2062 void signal_init_process(void)
2064 struct sigaction sig_act
;
2066 sig_act
.sa_mask
= server_block_set
;
2067 sig_act
.sa_flags
= SA_SIGINFO
| SA_RESTART
;
2069 sig_act
.sa_flags
|= SA_ONSTACK
;
2072 sig_act
.sa_sigaction
= int_handler
;
2073 if (sigaction( SIGINT
, &sig_act
, NULL
) == -1) goto error
;
2074 sig_act
.sa_sigaction
= fpe_handler
;
2075 if (sigaction( SIGFPE
, &sig_act
, NULL
) == -1) goto error
;
2076 sig_act
.sa_sigaction
= abrt_handler
;
2077 if (sigaction( SIGABRT
, &sig_act
, NULL
) == -1) goto error
;
2078 sig_act
.sa_sigaction
= quit_handler
;
2079 if (sigaction( SIGQUIT
, &sig_act
, NULL
) == -1) goto error
;
2080 sig_act
.sa_sigaction
= usr1_handler
;
2081 if (sigaction( SIGUSR1
, &sig_act
, NULL
) == -1) goto error
;
2083 sig_act
.sa_sigaction
= segv_handler
;
2084 if (sigaction( SIGSEGV
, &sig_act
, NULL
) == -1) goto error
;
2085 if (sigaction( SIGILL
, &sig_act
, NULL
) == -1) goto error
;
2087 if (sigaction( SIGBUS
, &sig_act
, NULL
) == -1) goto error
;
2091 sig_act
.sa_sigaction
= trap_handler
;
2092 if (sigaction( SIGTRAP
, &sig_act
, NULL
) == -1) goto error
;
2096 sig_act
.sa_sigaction
= usr2_handler
;
2097 if (sigaction( SIGUSR2
, &sig_act
, NULL
) == -1) goto error
;
2103 perror("sigaction");
2109 /**********************************************************************
2110 * __wine_enter_vm86 (NTDLL.@)
2112 * Enter vm86 mode with the specified register context.
2114 void __wine_enter_vm86( CONTEXT
*context
)
2116 EXCEPTION_RECORD rec
;
2118 struct vm86plus_struct vm86
;
2120 memset( &vm86
, 0, sizeof(vm86
) );
2123 restore_vm86_context( context
, &vm86
);
2125 ntdll_get_thread_data()->vm86_ptr
= &vm86
;
2126 merge_vm86_pending_flags( &rec
);
2128 res
= vm86_enter( &ntdll_get_thread_data()->vm86_ptr
); /* uses and clears teb->vm86_ptr */
2135 save_vm86_context( context
, &vm86
);
2137 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
2138 rec
.ExceptionRecord
= NULL
;
2139 rec
.ExceptionAddress
= (LPVOID
)context
->Eip
;
2140 rec
.NumberParameters
= 0;
2142 switch(VM86_TYPE(res
))
2144 case VM86_UNKNOWN
: /* unhandled GP fault - IO-instruction or similar */
2145 rec
.ExceptionCode
= EXCEPTION_PRIV_INSTRUCTION
;
2147 case VM86_TRAP
: /* return due to DOS-debugger request */
2148 switch(VM86_ARG(res
))
2150 case TRAP_x86_TRCTRAP
: /* Single-step exception */
2151 rec
.ExceptionCode
= EXCEPTION_SINGLE_STEP
;
2153 case TRAP_x86_BPTFLT
: /* Breakpoint exception */
2154 rec
.ExceptionAddress
= (char *)rec
.ExceptionAddress
- 1; /* back up over the int3 instruction */
2157 rec
.ExceptionCode
= EXCEPTION_BREAKPOINT
;
2161 case VM86_INTx
: /* int3/int x instruction (ARG = x) */
2162 rec
.ExceptionCode
= EXCEPTION_VM86_INTx
;
2163 rec
.NumberParameters
= 1;
2164 rec
.ExceptionInformation
[0] = VM86_ARG(res
);
2166 case VM86_STI
: /* sti/popf/iret instruction enabled virtual interrupts */
2167 context
->EFlags
|= VIF_FLAG
;
2168 context
->EFlags
&= ~VIP_FLAG
;
2169 get_vm86_teb_info()->vm86_pending
= 0;
2170 rec
.ExceptionCode
= EXCEPTION_VM86_STI
;
2172 case VM86_PICRETURN
: /* return due to pending PIC request */
2173 rec
.ExceptionCode
= EXCEPTION_VM86_PICRETURN
;
2175 case VM86_SIGNAL
: /* cannot happen because vm86_enter handles this case */
2177 WINE_ERR( "unhandled result from vm86 mode %x\n", res
);
2180 raise_exception( &rec
, context
, TRUE
);
2184 #else /* __HAVE_VM86 */
2185 /**********************************************************************
2186 * __wine_enter_vm86 (NTDLL.@)
2188 void __wine_enter_vm86( CONTEXT
*context
)
2190 MESSAGE("vm86 mode not supported on this platform\n");
2192 #endif /* __HAVE_VM86 */
2195 /*******************************************************************
2196 * RtlUnwind (NTDLL.@)
2198 void WINAPI
__regs_RtlUnwind( EXCEPTION_REGISTRATION_RECORD
* pEndFrame
, PVOID targetIp
,
2199 PEXCEPTION_RECORD pRecord
, PVOID retval
, CONTEXT
*context
)
2201 EXCEPTION_RECORD record
;
2202 EXCEPTION_REGISTRATION_RECORD
*frame
, *dispatch
;
2205 context
->Eax
= (DWORD
)retval
;
2207 /* build an exception record, if we do not have one */
2210 record
.ExceptionCode
= STATUS_UNWIND
;
2211 record
.ExceptionFlags
= 0;
2212 record
.ExceptionRecord
= NULL
;
2213 record
.ExceptionAddress
= (void *)context
->Eip
;
2214 record
.NumberParameters
= 0;
2218 pRecord
->ExceptionFlags
|= EH_UNWINDING
| (pEndFrame
? 0 : EH_EXIT_UNWIND
);
2220 TRACE( "code=%x flags=%x\n", pRecord
->ExceptionCode
, pRecord
->ExceptionFlags
);
2222 /* get chain of exception frames */
2223 frame
= NtCurrentTeb()->Tib
.ExceptionList
;
2224 while ((frame
!= (EXCEPTION_REGISTRATION_RECORD
*)~0UL) && (frame
!= pEndFrame
))
2226 /* Check frame address */
2227 if (pEndFrame
&& (frame
> pEndFrame
))
2228 raise_status( STATUS_INVALID_UNWIND_TARGET
, pRecord
);
2230 if (((void*)frame
< NtCurrentTeb()->Tib
.StackLimit
) ||
2231 ((void*)(frame
+1) > NtCurrentTeb()->Tib
.StackBase
) ||
2232 (UINT_PTR
)frame
& 3)
2233 raise_status( STATUS_BAD_STACK
, pRecord
);
2236 TRACE( "calling handler at %p code=%x flags=%x\n",
2237 frame
->Handler
, pRecord
->ExceptionCode
, pRecord
->ExceptionFlags
);
2238 res
= EXC_CallHandler( pRecord
, frame
, context
, &dispatch
, frame
->Handler
, unwind_handler
);
2239 TRACE( "handler at %p returned %x\n", frame
->Handler
, res
);
2243 case ExceptionContinueSearch
:
2245 case ExceptionCollidedUnwind
:
2249 raise_status( STATUS_INVALID_DISPOSITION
, pRecord
);
2252 frame
= __wine_pop_frame( frame
);
2255 DEFINE_REGS_ENTRYPOINT( RtlUnwind
, 4 )
2258 /*******************************************************************
2259 * NtRaiseException (NTDLL.@)
2261 NTSTATUS WINAPI
NtRaiseException( EXCEPTION_RECORD
*rec
, CONTEXT
*context
, BOOL first_chance
)
2263 NTSTATUS status
= raise_exception( rec
, context
, first_chance
);
2264 if (status
== STATUS_SUCCESS
) NtSetContextThread( GetCurrentThread(), context
);
2269 /***********************************************************************
2270 * RtlRaiseException (NTDLL.@)
2272 void WINAPI
__regs_RtlRaiseException( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
2276 rec
->ExceptionAddress
= (void *)context
->Eip
;
2277 status
= raise_exception( rec
, context
, TRUE
);
2278 if (status
!= STATUS_SUCCESS
) raise_status( status
, rec
);
2280 DEFINE_REGS_ENTRYPOINT( RtlRaiseException
, 1 )
2283 /* wrapper for apps that don't declare the thread function correctly */
2284 extern void DECLSPEC_NORETURN
call_thread_func( LPTHREAD_START_ROUTINE entry
, void *arg
);
2285 __ASM_GLOBAL_FUNC(call_thread_func
,
2287 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2288 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2289 "movl %esp,%ebp\n\t"
2290 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2292 "pushl 12(%ebp)\n\t"
2294 "leal -4(%ebp),%esp\n\t"
2296 "call " __ASM_NAME("exit_thread") "\n\t"
2299 /***********************************************************************
2300 * call_thread_entry_point
2302 void call_thread_entry_point( LPTHREAD_START_ROUTINE entry
, void *arg
)
2306 call_thread_func( entry
, arg
);
2308 __EXCEPT(unhandled_exception_filter
)
2310 NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
2313 abort(); /* should not be reached */
2316 /***********************************************************************
2317 * RtlExitUserThread (NTDLL.@)
2319 void WINAPI
RtlExitUserThread( ULONG status
)
2321 exit_thread( status
);
2324 /**********************************************************************
2325 * DbgBreakPoint (NTDLL.@)
2327 __ASM_STDCALL_FUNC( DbgBreakPoint
, 0, "int $3; ret")
2329 /**********************************************************************
2330 * DbgUserBreakPoint (NTDLL.@)
2332 __ASM_STDCALL_FUNC( DbgUserBreakPoint
, 0, "int $3; ret")
2334 /**********************************************************************
2335 * NtCurrentTeb (NTDLL.@)
2337 __ASM_STDCALL_FUNC( NtCurrentTeb
, 0, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" )
2340 /**********************************************************************
2341 * EXC_CallHandler (internal)
2343 * Some exception handlers depend on EBP to have a fixed position relative to
2344 * the exception frame.
2345 * Shrinker depends on (*1) doing what it does,
2346 * (*2) being the exact instruction it is and (*3) beginning with 0x64
2347 * (i.e. the %fs prefix to the movl instruction). It also depends on the
2348 * function calling the handler having only 5 parameters (*4).
2350 __ASM_GLOBAL_FUNC( EXC_CallHandler
,
2352 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2353 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2354 "movl %esp,%ebp\n\t"
2355 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2357 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2358 "movl 28(%ebp), %edx\n\t" /* ugly hack to pass the 6th param needed because of Shrinker */
2359 "pushl 24(%ebp)\n\t"
2360 "pushl 20(%ebp)\n\t"
2361 "pushl 16(%ebp)\n\t"
2362 "pushl 12(%ebp)\n\t"
2364 "call " __ASM_NAME("call_exception_handler") "\n\t"
2366 __ASM_CFI(".cfi_same_value %ebx\n\t")
2368 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2369 __ASM_CFI(".cfi_same_value %ebp\n\t")
2371 __ASM_GLOBAL_FUNC(call_exception_handler
,
2373 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2374 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2375 "movl %esp,%ebp\n\t"
2376 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2378 "pushl 12(%ebp)\n\t" /* make any exceptions in this... */
2379 "pushl %edx\n\t" /* handler be handled by... */
2381 "pushl (0)\n\t" /* nested_handler (passed in edx). */
2383 "movl %esp,(0)\n\t" /* push the new exception frame onto the exception stack. */
2384 "pushl 20(%ebp)\n\t"
2385 "pushl 16(%ebp)\n\t"
2386 "pushl 12(%ebp)\n\t"
2388 "movl 24(%ebp), %ecx\n\t" /* (*1) */
2389 "call *%ecx\n\t" /* call handler. (*2) */
2391 "movl (0), %esp\n\t" /* restore previous... (*3) */
2393 "popl (0)\n\t" /* exception frame. */
2394 "movl %ebp, %esp\n\t" /* restore saved stack, in case it was corrupted */
2396 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2397 __ASM_CFI(".cfi_same_value %ebp\n\t")
2398 "ret $20" ) /* (*4) */
2400 #endif /* __i386__ */