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_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(), rec
->ExceptionCode
);
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()->SpareBytes1
;
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
);
876 extern void clear_alignment_flag(void);
877 __ASM_GLOBAL_FUNC( clear_alignment_flag
,
879 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
880 "andl $~0x40000,(%esp)\n\t"
882 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
886 /***********************************************************************
889 * Handler initialization when the full context is not needed.
890 * Return the stack pointer to use for pushing the exception data.
892 static inline void *init_handler( const SIGCONTEXT
*sigcontext
, WORD
*fs
, WORD
*gs
)
894 TEB
*teb
= get_current_teb();
896 clear_alignment_flag();
898 /* get %fs and %gs at time of the fault */
900 *fs
= LOWORD(FS_sig(sigcontext
));
905 *gs
= LOWORD(GS_sig(sigcontext
));
910 #ifndef __sun /* see above for Solaris handling */
912 struct ntdll_thread_data
*thread_data
= (struct ntdll_thread_data
*)teb
->SpareBytes1
;
913 wine_set_fs( thread_data
->fs
);
914 wine_set_gs( thread_data
->gs
);
918 if (!wine_ldt_is_system(CS_sig(sigcontext
)) ||
919 !wine_ldt_is_system(SS_sig(sigcontext
))) /* 16-bit mode */
922 * Win16 or DOS protected mode. Note that during switch
923 * from 16-bit mode to linear mode, CS may be set to system
924 * segment before FS is restored. Fortunately, in this case
925 * SS is still non-system segment. This is why both CS and SS
928 return teb
->WOW32Reserved
;
930 return (void *)(ESP_sig(sigcontext
) & ~3);
934 /***********************************************************************
937 * Save the thread FPU context.
939 static inline void save_fpu( CONTEXT
*context
)
942 context
->ContextFlags
|= CONTEXT_FLOATING_POINT
;
943 __asm__
__volatile__( "fnsave %0; fwait" : "=m" (context
->FloatSave
) );
948 /***********************************************************************
951 * Save the thread FPU extended context.
953 static inline void save_fpux( CONTEXT
*context
)
956 /* we have to enforce alignment by hand */
957 char buffer
[sizeof(XMM_SAVE_AREA32
) + 16];
958 XMM_SAVE_AREA32
*state
= (XMM_SAVE_AREA32
*)(((ULONG_PTR
)buffer
+ 15) & ~15);
960 __asm__
__volatile__( "fxsave %0" : "=m" (*state
) );
961 context
->ContextFlags
|= CONTEXT_EXTENDED_REGISTERS
;
962 memcpy( context
->ExtendedRegisters
, state
, sizeof(*state
) );
967 /***********************************************************************
970 * Restore the FPU context to a sigcontext.
972 static inline void restore_fpu( const CONTEXT
*context
)
974 FLOATING_SAVE_AREA float_status
= context
->FloatSave
;
975 /* reset the current interrupt status */
976 float_status
.StatusWord
&= float_status
.ControlWord
| 0xffffff80;
978 __asm__
__volatile__( "frstor %0; fwait" : : "m" (float_status
) );
979 #endif /* __GNUC__ */
983 /***********************************************************************
986 * Restore the FPU extended context to a sigcontext.
988 static inline void restore_fpux( const CONTEXT
*context
)
991 /* we have to enforce alignment by hand */
992 char buffer
[sizeof(XMM_SAVE_AREA32
) + 16];
993 XMM_SAVE_AREA32
*state
= (XMM_SAVE_AREA32
*)(((ULONG_PTR
)buffer
+ 15) & ~15);
995 memcpy( state
, context
->ExtendedRegisters
, sizeof(*state
) );
996 /* reset the current interrupt status */
997 state
->StatusWord
&= state
->ControlWord
| 0xff80;
998 __asm__
__volatile__( "fxrstor %0" : : "m" (*state
) );
1003 /***********************************************************************
1006 * Build a standard FPU context from an extended one.
1008 static void fpux_to_fpu( FLOATING_SAVE_AREA
*fpu
, const XMM_SAVE_AREA32
*fpux
)
1010 unsigned int i
, tag
, stack_top
;
1012 fpu
->ControlWord
= fpux
->ControlWord
| 0xffff0000;
1013 fpu
->StatusWord
= fpux
->StatusWord
| 0xffff0000;
1014 fpu
->ErrorOffset
= fpux
->ErrorOffset
;
1015 fpu
->ErrorSelector
= fpux
->ErrorSelector
| (fpux
->ErrorOpcode
<< 16);
1016 fpu
->DataOffset
= fpux
->DataOffset
;
1017 fpu
->DataSelector
= fpux
->DataSelector
;
1018 fpu
->Cr0NpxState
= fpux
->StatusWord
| 0xffff0000;
1020 stack_top
= (fpux
->StatusWord
>> 11) & 7;
1021 fpu
->TagWord
= 0xffff0000;
1022 for (i
= 0; i
< 8; i
++)
1024 memcpy( &fpu
->RegisterArea
[10 * i
], &fpux
->FloatRegisters
[i
], 10 );
1025 if (!(fpux
->TagWord
& (1 << i
))) tag
= 3; /* empty */
1028 const M128A
*reg
= &fpux
->FloatRegisters
[(i
- stack_top
) & 7];
1029 if ((reg
->High
& 0x7fff) == 0x7fff) /* exponent all ones */
1031 tag
= 2; /* special */
1033 else if (!(reg
->High
& 0x7fff)) /* exponent all zeroes */
1035 if (reg
->Low
) tag
= 2; /* special */
1036 else tag
= 1; /* zero */
1040 if (reg
->Low
>> 63) tag
= 0; /* valid */
1041 else tag
= 2; /* special */
1044 fpu
->TagWord
|= tag
<< (2 * i
);
1049 /***********************************************************************
1052 * Build a context structure from the signal info.
1054 static inline void save_context( CONTEXT
*context
, const SIGCONTEXT
*sigcontext
, WORD fs
, WORD gs
)
1056 struct ntdll_thread_data
* const regs
= ntdll_get_thread_data();
1057 FLOATING_SAVE_AREA
*fpu
= FPU_sig(sigcontext
);
1058 XMM_SAVE_AREA32
*fpux
= FPUX_sig(sigcontext
);
1060 memset(context
, 0, sizeof(*context
));
1061 context
->ContextFlags
= CONTEXT_FULL
| CONTEXT_DEBUG_REGISTERS
;
1062 context
->Eax
= EAX_sig(sigcontext
);
1063 context
->Ebx
= EBX_sig(sigcontext
);
1064 context
->Ecx
= ECX_sig(sigcontext
);
1065 context
->Edx
= EDX_sig(sigcontext
);
1066 context
->Esi
= ESI_sig(sigcontext
);
1067 context
->Edi
= EDI_sig(sigcontext
);
1068 context
->Ebp
= EBP_sig(sigcontext
);
1069 context
->EFlags
= EFL_sig(sigcontext
);
1070 context
->Eip
= EIP_sig(sigcontext
);
1071 context
->Esp
= ESP_sig(sigcontext
);
1072 context
->SegCs
= LOWORD(CS_sig(sigcontext
));
1073 context
->SegDs
= LOWORD(DS_sig(sigcontext
));
1074 context
->SegEs
= LOWORD(ES_sig(sigcontext
));
1075 context
->SegFs
= fs
;
1076 context
->SegGs
= gs
;
1077 context
->SegSs
= LOWORD(SS_sig(sigcontext
));
1078 context
->Dr0
= regs
->dr0
;
1079 context
->Dr1
= regs
->dr1
;
1080 context
->Dr2
= regs
->dr2
;
1081 context
->Dr3
= regs
->dr3
;
1082 context
->Dr6
= regs
->dr6
;
1083 context
->Dr7
= regs
->dr7
;
1087 context
->ContextFlags
|= CONTEXT_FLOATING_POINT
;
1088 context
->FloatSave
= *fpu
;
1092 context
->ContextFlags
|= CONTEXT_FLOATING_POINT
| CONTEXT_EXTENDED_REGISTERS
;
1093 memcpy( context
->ExtendedRegisters
, fpux
, sizeof(*fpux
) );
1095 if (!fpu
) fpux_to_fpu( &context
->FloatSave
, fpux
);
1097 if (!fpu
&& !fpux
) save_fpu( context
);
1101 /***********************************************************************
1104 * Restore the signal info from the context.
1106 static inline void restore_context( const CONTEXT
*context
, SIGCONTEXT
*sigcontext
)
1108 struct ntdll_thread_data
* const regs
= ntdll_get_thread_data();
1109 FLOATING_SAVE_AREA
*fpu
= FPU_sig(sigcontext
);
1110 XMM_SAVE_AREA32
*fpux
= FPUX_sig(sigcontext
);
1112 regs
->dr0
= context
->Dr0
;
1113 regs
->dr1
= context
->Dr1
;
1114 regs
->dr2
= context
->Dr2
;
1115 regs
->dr3
= context
->Dr3
;
1116 regs
->dr6
= context
->Dr6
;
1117 regs
->dr7
= context
->Dr7
;
1118 EAX_sig(sigcontext
) = context
->Eax
;
1119 EBX_sig(sigcontext
) = context
->Ebx
;
1120 ECX_sig(sigcontext
) = context
->Ecx
;
1121 EDX_sig(sigcontext
) = context
->Edx
;
1122 ESI_sig(sigcontext
) = context
->Esi
;
1123 EDI_sig(sigcontext
) = context
->Edi
;
1124 EBP_sig(sigcontext
) = context
->Ebp
;
1125 EFL_sig(sigcontext
) = context
->EFlags
;
1126 EIP_sig(sigcontext
) = context
->Eip
;
1127 ESP_sig(sigcontext
) = context
->Esp
;
1128 CS_sig(sigcontext
) = context
->SegCs
;
1129 DS_sig(sigcontext
) = context
->SegDs
;
1130 ES_sig(sigcontext
) = context
->SegEs
;
1131 SS_sig(sigcontext
) = context
->SegSs
;
1133 GS_sig(sigcontext
) = context
->SegGs
;
1135 wine_set_gs( context
->SegGs
);
1138 FS_sig(sigcontext
) = context
->SegFs
;
1140 wine_set_fs( context
->SegFs
);
1143 if (fpu
) *fpu
= context
->FloatSave
;
1144 if (fpux
) memcpy( fpux
, context
->ExtendedRegisters
, sizeof(*fpux
) );
1145 if (!fpu
&& !fpux
) restore_fpu( context
);
1149 /***********************************************************************
1150 * RtlCaptureContext (NTDLL.@)
1152 void WINAPI
__regs_RtlCaptureContext( CONTEXT
*context
, CONTEXT
*regs
)
1155 if (fpux_support
) save_fpux( context
);
1156 else save_fpu( context
);
1158 DEFINE_REGS_ENTRYPOINT( RtlCaptureContext
, 1 )
1161 /***********************************************************************
1164 * Set the new CPU context. Used by NtSetContextThread.
1166 void set_cpu_context( const CONTEXT
*context
)
1168 DWORD flags
= context
->ContextFlags
& ~CONTEXT_i386
;
1170 if ((flags
& CONTEXT_EXTENDED_REGISTERS
) && fpux_support
) restore_fpux( context
);
1171 else if (flags
& CONTEXT_FLOATING_POINT
) restore_fpu( context
);
1173 if (flags
& CONTEXT_DEBUG_REGISTERS
)
1175 ntdll_get_thread_data()->dr0
= context
->Dr0
;
1176 ntdll_get_thread_data()->dr1
= context
->Dr1
;
1177 ntdll_get_thread_data()->dr2
= context
->Dr2
;
1178 ntdll_get_thread_data()->dr3
= context
->Dr3
;
1179 ntdll_get_thread_data()->dr6
= context
->Dr6
;
1180 ntdll_get_thread_data()->dr7
= context
->Dr7
;
1182 if (flags
& CONTEXT_FULL
)
1184 if (!(flags
& CONTEXT_CONTROL
))
1185 FIXME( "setting partial context (%x) not supported\n", flags
);
1186 else if (flags
& CONTEXT_SEGMENTS
)
1187 __wine_restore_regs( context
);
1190 CONTEXT newcontext
= *context
;
1191 newcontext
.SegDs
= wine_get_ds();
1192 newcontext
.SegEs
= wine_get_es();
1193 newcontext
.SegFs
= wine_get_fs();
1194 newcontext
.SegGs
= wine_get_gs();
1195 __wine_restore_regs( &newcontext
);
1201 /***********************************************************************
1202 * set_debug_registers
1204 static void set_debug_registers( const CONTEXT
*context
)
1206 DWORD flags
= context
->ContextFlags
& ~CONTEXT_i386
;
1207 context_t server_context
;
1209 if (!(flags
& CONTEXT_DEBUG_REGISTERS
)) return;
1210 if (ntdll_get_thread_data()->dr0
== context
->Dr0
&&
1211 ntdll_get_thread_data()->dr1
== context
->Dr1
&&
1212 ntdll_get_thread_data()->dr2
== context
->Dr2
&&
1213 ntdll_get_thread_data()->dr3
== context
->Dr3
&&
1214 ntdll_get_thread_data()->dr6
== context
->Dr6
&&
1215 ntdll_get_thread_data()->dr7
== context
->Dr7
) return;
1217 context_to_server( &server_context
, context
);
1219 SERVER_START_REQ( set_thread_context
)
1221 req
->handle
= wine_server_obj_handle( GetCurrentThread() );
1223 wine_server_add_data( req
, &server_context
, sizeof(server_context
) );
1224 wine_server_call( req
);
1230 /***********************************************************************
1233 * Copy a register context according to the flags.
1235 void copy_context( CONTEXT
*to
, const CONTEXT
*from
, DWORD flags
)
1237 flags
&= ~CONTEXT_i386
; /* get rid of CPU id */
1238 if (flags
& CONTEXT_INTEGER
)
1240 to
->Eax
= from
->Eax
;
1241 to
->Ebx
= from
->Ebx
;
1242 to
->Ecx
= from
->Ecx
;
1243 to
->Edx
= from
->Edx
;
1244 to
->Esi
= from
->Esi
;
1245 to
->Edi
= from
->Edi
;
1247 if (flags
& CONTEXT_CONTROL
)
1249 to
->Ebp
= from
->Ebp
;
1250 to
->Esp
= from
->Esp
;
1251 to
->Eip
= from
->Eip
;
1252 to
->SegCs
= from
->SegCs
;
1253 to
->SegSs
= from
->SegSs
;
1254 to
->EFlags
= from
->EFlags
;
1256 if (flags
& CONTEXT_SEGMENTS
)
1258 to
->SegDs
= from
->SegDs
;
1259 to
->SegEs
= from
->SegEs
;
1260 to
->SegFs
= from
->SegFs
;
1261 to
->SegGs
= from
->SegGs
;
1263 if (flags
& CONTEXT_DEBUG_REGISTERS
)
1265 to
->Dr0
= from
->Dr0
;
1266 to
->Dr1
= from
->Dr1
;
1267 to
->Dr2
= from
->Dr2
;
1268 to
->Dr3
= from
->Dr3
;
1269 to
->Dr6
= from
->Dr6
;
1270 to
->Dr7
= from
->Dr7
;
1272 if (flags
& CONTEXT_FLOATING_POINT
)
1274 to
->FloatSave
= from
->FloatSave
;
1276 if (flags
& CONTEXT_EXTENDED_REGISTERS
)
1278 memcpy( to
->ExtendedRegisters
, from
->ExtendedRegisters
, sizeof(to
->ExtendedRegisters
) );
1283 /***********************************************************************
1286 * Convert a register context to the server format.
1288 NTSTATUS
context_to_server( context_t
*to
, const CONTEXT
*from
)
1290 DWORD flags
= from
->ContextFlags
& ~CONTEXT_i386
; /* get rid of CPU id */
1292 memset( to
, 0, sizeof(*to
) );
1295 if (flags
& CONTEXT_CONTROL
)
1297 to
->flags
|= SERVER_CTX_CONTROL
;
1298 to
->ctl
.i386_regs
.ebp
= from
->Ebp
;
1299 to
->ctl
.i386_regs
.esp
= from
->Esp
;
1300 to
->ctl
.i386_regs
.eip
= from
->Eip
;
1301 to
->ctl
.i386_regs
.cs
= from
->SegCs
;
1302 to
->ctl
.i386_regs
.ss
= from
->SegSs
;
1303 to
->ctl
.i386_regs
.eflags
= from
->EFlags
;
1305 if (flags
& CONTEXT_INTEGER
)
1307 to
->flags
|= SERVER_CTX_INTEGER
;
1308 to
->integer
.i386_regs
.eax
= from
->Eax
;
1309 to
->integer
.i386_regs
.ebx
= from
->Ebx
;
1310 to
->integer
.i386_regs
.ecx
= from
->Ecx
;
1311 to
->integer
.i386_regs
.edx
= from
->Edx
;
1312 to
->integer
.i386_regs
.esi
= from
->Esi
;
1313 to
->integer
.i386_regs
.edi
= from
->Edi
;
1315 if (flags
& CONTEXT_SEGMENTS
)
1317 to
->flags
|= SERVER_CTX_SEGMENTS
;
1318 to
->seg
.i386_regs
.ds
= from
->SegDs
;
1319 to
->seg
.i386_regs
.es
= from
->SegEs
;
1320 to
->seg
.i386_regs
.fs
= from
->SegFs
;
1321 to
->seg
.i386_regs
.gs
= from
->SegGs
;
1323 if (flags
& CONTEXT_FLOATING_POINT
)
1325 to
->flags
|= SERVER_CTX_FLOATING_POINT
;
1326 to
->fp
.i386_regs
.ctrl
= from
->FloatSave
.ControlWord
;
1327 to
->fp
.i386_regs
.status
= from
->FloatSave
.StatusWord
;
1328 to
->fp
.i386_regs
.tag
= from
->FloatSave
.TagWord
;
1329 to
->fp
.i386_regs
.err_off
= from
->FloatSave
.ErrorOffset
;
1330 to
->fp
.i386_regs
.err_sel
= from
->FloatSave
.ErrorSelector
;
1331 to
->fp
.i386_regs
.data_off
= from
->FloatSave
.DataOffset
;
1332 to
->fp
.i386_regs
.data_sel
= from
->FloatSave
.DataSelector
;
1333 to
->fp
.i386_regs
.cr0npx
= from
->FloatSave
.Cr0NpxState
;
1334 memcpy( to
->fp
.i386_regs
.regs
, from
->FloatSave
.RegisterArea
, sizeof(to
->fp
.i386_regs
.regs
) );
1336 if (flags
& CONTEXT_DEBUG_REGISTERS
)
1338 to
->flags
|= SERVER_CTX_DEBUG_REGISTERS
;
1339 to
->debug
.i386_regs
.dr0
= from
->Dr0
;
1340 to
->debug
.i386_regs
.dr1
= from
->Dr1
;
1341 to
->debug
.i386_regs
.dr2
= from
->Dr2
;
1342 to
->debug
.i386_regs
.dr3
= from
->Dr3
;
1343 to
->debug
.i386_regs
.dr6
= from
->Dr6
;
1344 to
->debug
.i386_regs
.dr7
= from
->Dr7
;
1346 if (flags
& CONTEXT_EXTENDED_REGISTERS
)
1348 to
->flags
|= SERVER_CTX_EXTENDED_REGISTERS
;
1349 memcpy( to
->ext
.i386_regs
, from
->ExtendedRegisters
, sizeof(to
->ext
.i386_regs
) );
1351 return STATUS_SUCCESS
;
1355 /***********************************************************************
1356 * context_from_server
1358 * Convert a register context from the server format.
1360 NTSTATUS
context_from_server( CONTEXT
*to
, const context_t
*from
)
1362 if (from
->cpu
!= CPU_x86
) return STATUS_INVALID_PARAMETER
;
1364 to
->ContextFlags
= CONTEXT_i386
;
1365 if (from
->flags
& SERVER_CTX_CONTROL
)
1367 to
->ContextFlags
|= CONTEXT_CONTROL
;
1368 to
->Ebp
= from
->ctl
.i386_regs
.ebp
;
1369 to
->Esp
= from
->ctl
.i386_regs
.esp
;
1370 to
->Eip
= from
->ctl
.i386_regs
.eip
;
1371 to
->SegCs
= from
->ctl
.i386_regs
.cs
;
1372 to
->SegSs
= from
->ctl
.i386_regs
.ss
;
1373 to
->EFlags
= from
->ctl
.i386_regs
.eflags
;
1375 if (from
->flags
& SERVER_CTX_INTEGER
)
1377 to
->ContextFlags
|= CONTEXT_INTEGER
;
1378 to
->Eax
= from
->integer
.i386_regs
.eax
;
1379 to
->Ebx
= from
->integer
.i386_regs
.ebx
;
1380 to
->Ecx
= from
->integer
.i386_regs
.ecx
;
1381 to
->Edx
= from
->integer
.i386_regs
.edx
;
1382 to
->Esi
= from
->integer
.i386_regs
.esi
;
1383 to
->Edi
= from
->integer
.i386_regs
.edi
;
1385 if (from
->flags
& SERVER_CTX_SEGMENTS
)
1387 to
->ContextFlags
|= CONTEXT_SEGMENTS
;
1388 to
->SegDs
= from
->seg
.i386_regs
.ds
;
1389 to
->SegEs
= from
->seg
.i386_regs
.es
;
1390 to
->SegFs
= from
->seg
.i386_regs
.fs
;
1391 to
->SegGs
= from
->seg
.i386_regs
.gs
;
1393 if (from
->flags
& SERVER_CTX_FLOATING_POINT
)
1395 to
->ContextFlags
|= CONTEXT_FLOATING_POINT
;
1396 to
->FloatSave
.ControlWord
= from
->fp
.i386_regs
.ctrl
;
1397 to
->FloatSave
.StatusWord
= from
->fp
.i386_regs
.status
;
1398 to
->FloatSave
.TagWord
= from
->fp
.i386_regs
.tag
;
1399 to
->FloatSave
.ErrorOffset
= from
->fp
.i386_regs
.err_off
;
1400 to
->FloatSave
.ErrorSelector
= from
->fp
.i386_regs
.err_sel
;
1401 to
->FloatSave
.DataOffset
= from
->fp
.i386_regs
.data_off
;
1402 to
->FloatSave
.DataSelector
= from
->fp
.i386_regs
.data_sel
;
1403 to
->FloatSave
.Cr0NpxState
= from
->fp
.i386_regs
.cr0npx
;
1404 memcpy( to
->FloatSave
.RegisterArea
, from
->fp
.i386_regs
.regs
, sizeof(to
->FloatSave
.RegisterArea
) );
1406 if (from
->flags
& SERVER_CTX_DEBUG_REGISTERS
)
1408 to
->ContextFlags
|= CONTEXT_DEBUG_REGISTERS
;
1409 to
->Dr0
= from
->debug
.i386_regs
.dr0
;
1410 to
->Dr1
= from
->debug
.i386_regs
.dr1
;
1411 to
->Dr2
= from
->debug
.i386_regs
.dr2
;
1412 to
->Dr3
= from
->debug
.i386_regs
.dr3
;
1413 to
->Dr6
= from
->debug
.i386_regs
.dr6
;
1414 to
->Dr7
= from
->debug
.i386_regs
.dr7
;
1416 if (from
->flags
& SERVER_CTX_EXTENDED_REGISTERS
)
1418 to
->ContextFlags
|= CONTEXT_EXTENDED_REGISTERS
;
1419 memcpy( to
->ExtendedRegisters
, from
->ext
.i386_regs
, sizeof(to
->ExtendedRegisters
) );
1421 return STATUS_SUCCESS
;
1425 /***********************************************************************
1426 * is_privileged_instr
1428 * Check if the fault location is a privileged instruction.
1429 * Based on the instruction emulation code in dlls/kernel/instr.c.
1431 static inline DWORD
is_privileged_instr( CONTEXT
*context
)
1434 unsigned int prefix_count
= 0;
1436 if (!wine_ldt_is_system( context
->SegCs
)) return 0;
1437 instr
= (BYTE
*)context
->Eip
;
1439 for (;;) switch(*instr
)
1441 /* instruction prefixes */
1442 case 0x2e: /* %cs: */
1443 case 0x36: /* %ss: */
1444 case 0x3e: /* %ds: */
1445 case 0x26: /* %es: */
1446 case 0x64: /* %fs: */
1447 case 0x65: /* %gs: */
1448 case 0x66: /* opcode size */
1449 case 0x67: /* addr size */
1450 case 0xf0: /* lock */
1451 case 0xf2: /* repne */
1452 case 0xf3: /* repe */
1453 if (++prefix_count
>= 15) return EXCEPTION_ILLEGAL_INSTRUCTION
;
1457 case 0x0f: /* extended instruction */
1460 case 0x20: /* mov crX, reg */
1461 case 0x21: /* mov drX, reg */
1462 case 0x22: /* mov reg, crX */
1463 case 0x23: /* mov reg drX */
1464 return EXCEPTION_PRIV_INSTRUCTION
;
1467 case 0x6c: /* insb (%dx) */
1468 case 0x6d: /* insl (%dx) */
1469 case 0x6e: /* outsb (%dx) */
1470 case 0x6f: /* outsl (%dx) */
1471 case 0xcd: /* int $xx */
1472 case 0xe4: /* inb al,XX */
1473 case 0xe5: /* in (e)ax,XX */
1474 case 0xe6: /* outb XX,al */
1475 case 0xe7: /* out XX,(e)ax */
1476 case 0xec: /* inb (%dx),%al */
1477 case 0xed: /* inl (%dx),%eax */
1478 case 0xee: /* outb %al,(%dx) */
1479 case 0xef: /* outl %eax,(%dx) */
1480 case 0xf4: /* hlt */
1481 case 0xfa: /* cli */
1482 case 0xfb: /* sti */
1483 return EXCEPTION_PRIV_INSTRUCTION
;
1490 #include "pshpack1.h"
1493 DWORD movl
; /* movl this,4(%esp) */
1495 BYTE jmp
; /* jmp func */
1498 #include "poppack.h"
1500 /**********************************************************************
1503 * Check if code destination is an ATL thunk, and emulate it if so.
1505 static BOOL
check_atl_thunk( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1507 const struct atl_thunk
*thunk
= (const struct atl_thunk
*)rec
->ExceptionInformation
[1];
1512 if (thunk
->movl
== 0x042444c7 && thunk
->jmp
== 0xe9)
1514 *((DWORD
*)context
->Esp
+ 1) = thunk
->this;
1515 context
->Eip
= (DWORD_PTR
)(&thunk
->func
+ 1) + thunk
->func
;
1516 TRACE( "emulating ATL thunk at %p, func=%08x arg=%08x\n",
1517 thunk
, context
->Eip
, *((DWORD
*)context
->Esp
+ 1) );
1530 /***********************************************************************
1531 * setup_exception_record
1533 * Setup the exception record and context on the thread stack.
1535 static EXCEPTION_RECORD
*setup_exception_record( SIGCONTEXT
*sigcontext
, void *stack_ptr
,
1536 WORD fs
, WORD gs
, raise_func func
)
1540 void *ret_addr
; /* return address from raise_func */
1541 EXCEPTION_RECORD
*rec_ptr
; /* first arg for raise_func */
1542 CONTEXT
*context_ptr
; /* second arg for raise_func */
1544 EXCEPTION_RECORD rec
;
1547 } *stack
= stack_ptr
;
1548 DWORD exception_code
= 0;
1550 /* stack sanity checks */
1552 if ((char *)stack
>= (char *)get_signal_stack() &&
1553 (char *)stack
< (char *)get_signal_stack() + signal_stack_size
)
1555 WINE_ERR( "nested exception on signal stack in thread %04x eip %08x esp %08x stack %p-%p\n",
1556 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1557 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->Tib
.StackLimit
,
1558 NtCurrentTeb()->Tib
.StackBase
);
1562 if (stack
- 1 > stack
|| /* check for overflow in subtraction */
1563 (char *)stack
<= (char *)NtCurrentTeb()->DeallocationStack
||
1564 (char *)stack
> (char *)NtCurrentTeb()->Tib
.StackBase
)
1566 WARN( "exception outside of stack limits in thread %04x eip %08x esp %08x stack %p-%p\n",
1567 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1568 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->Tib
.StackLimit
,
1569 NtCurrentTeb()->Tib
.StackBase
);
1571 else if ((char *)(stack
- 1) < (char *)NtCurrentTeb()->DeallocationStack
+ 4096)
1573 /* stack overflow on last page, unrecoverable */
1574 UINT diff
= (char *)NtCurrentTeb()->DeallocationStack
+ 4096 - (char *)(stack
- 1);
1575 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1576 diff
, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1577 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->DeallocationStack
,
1578 NtCurrentTeb()->Tib
.StackLimit
, NtCurrentTeb()->Tib
.StackBase
);
1581 else if ((char *)(stack
- 1) < (char *)NtCurrentTeb()->Tib
.StackLimit
)
1583 /* stack access below stack limit, may be recoverable */
1584 if (virtual_handle_stack_fault( stack
- 1 )) exception_code
= EXCEPTION_STACK_OVERFLOW
;
1587 UINT diff
= (char *)NtCurrentTeb()->Tib
.StackLimit
- (char *)(stack
- 1);
1588 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1589 diff
, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1590 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->DeallocationStack
,
1591 NtCurrentTeb()->Tib
.StackLimit
, NtCurrentTeb()->Tib
.StackBase
);
1596 stack
--; /* push the stack_layout structure */
1597 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
1598 VALGRIND_MAKE_MEM_UNDEFINED(stack
, sizeof(*stack
));
1599 #elif defined(VALGRIND_MAKE_WRITABLE)
1600 VALGRIND_MAKE_WRITABLE(stack
, sizeof(*stack
));
1602 stack
->ret_addr
= (void *)0xdeadbabe; /* raise_func must not return */
1603 stack
->rec_ptr
= &stack
->rec
;
1604 stack
->context_ptr
= &stack
->context
;
1606 stack
->rec
.ExceptionRecord
= NULL
;
1607 stack
->rec
.ExceptionCode
= exception_code
;
1608 stack
->rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
1609 stack
->rec
.ExceptionAddress
= (LPVOID
)EIP_sig(sigcontext
);
1610 stack
->rec
.NumberParameters
= 0;
1612 save_context( &stack
->context
, sigcontext
, fs
, gs
);
1614 /* now modify the sigcontext to return to the raise function */
1615 ESP_sig(sigcontext
) = (DWORD
)stack
;
1616 EIP_sig(sigcontext
) = (DWORD
)func
;
1617 /* clear single-step, direction, and align check flag */
1618 EFL_sig(sigcontext
) &= ~(0x100|0x400|0x40000);
1619 CS_sig(sigcontext
) = wine_get_cs();
1620 DS_sig(sigcontext
) = wine_get_ds();
1621 ES_sig(sigcontext
) = wine_get_es();
1622 FS_sig(sigcontext
) = wine_get_fs();
1623 GS_sig(sigcontext
) = wine_get_gs();
1624 SS_sig(sigcontext
) = wine_get_ss();
1626 return stack
->rec_ptr
;
1630 /***********************************************************************
1633 * Setup a proper stack frame for the raise function, and modify the
1634 * sigcontext so that the return from the signal handler will call
1635 * the raise function.
1637 static EXCEPTION_RECORD
*setup_exception( SIGCONTEXT
*sigcontext
, raise_func func
)
1640 void *stack
= init_handler( sigcontext
, &fs
, &gs
);
1642 return setup_exception_record( sigcontext
, stack
, fs
, gs
, func
);
1646 /***********************************************************************
1647 * get_exception_context
1649 * Get a pointer to the context built by setup_exception.
1651 static inline CONTEXT
*get_exception_context( EXCEPTION_RECORD
*rec
)
1653 return (CONTEXT
*)rec
- 1; /* cf. stack_layout structure */
1657 /**********************************************************************
1660 * Get the FPU exception code from the FPU status.
1662 static inline DWORD
get_fpu_code( const CONTEXT
*context
)
1664 DWORD status
= context
->FloatSave
.StatusWord
& ~(context
->FloatSave
.ControlWord
& 0x3f);
1666 if (status
& 0x01) /* IE */
1668 if (status
& 0x40) /* SF */
1669 return EXCEPTION_FLT_STACK_CHECK
;
1671 return EXCEPTION_FLT_INVALID_OPERATION
;
1673 if (status
& 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND
; /* DE flag */
1674 if (status
& 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO
; /* ZE flag */
1675 if (status
& 0x08) return EXCEPTION_FLT_OVERFLOW
; /* OE flag */
1676 if (status
& 0x10) return EXCEPTION_FLT_UNDERFLOW
; /* UE flag */
1677 if (status
& 0x20) return EXCEPTION_FLT_INEXACT_RESULT
; /* PE flag */
1678 return EXCEPTION_FLT_INVALID_OPERATION
; /* generic error */
1682 /**********************************************************************
1683 * raise_segv_exception
1685 static void WINAPI
raise_segv_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1689 switch(rec
->ExceptionCode
)
1691 case EXCEPTION_ACCESS_VIOLATION
:
1692 if (rec
->NumberParameters
== 2)
1694 if (rec
->ExceptionInformation
[0] == EXCEPTION_EXECUTE_FAULT
&& check_atl_thunk( rec
, context
))
1696 if (!(rec
->ExceptionCode
= virtual_handle_fault( (void *)rec
->ExceptionInformation
[1],
1697 rec
->ExceptionInformation
[0] )))
1699 /* send EXCEPTION_EXECUTE_FAULT only if data execution prevention is enabled */
1700 if (rec
->ExceptionInformation
[0] == EXCEPTION_EXECUTE_FAULT
)
1703 NtQueryInformationProcess( GetCurrentProcess(), ProcessExecuteFlags
,
1704 &flags
, sizeof(flags
), NULL
);
1705 if (!(flags
& MEM_EXECUTE_OPTION_DISABLE
))
1706 rec
->ExceptionInformation
[0] = EXCEPTION_READ_FAULT
;
1710 case EXCEPTION_DATATYPE_MISALIGNMENT
:
1711 /* FIXME: pass through exception handler first? */
1712 if (context
->EFlags
& 0x00040000)
1714 /* Disable AC flag, return */
1715 context
->EFlags
&= ~0x00040000;
1720 status
= NtRaiseException( rec
, context
, TRUE
);
1721 raise_status( status
, rec
);
1723 set_cpu_context( context
);
1727 /**********************************************************************
1728 * raise_trap_exception
1730 static void WINAPI
raise_trap_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1734 if (rec
->ExceptionCode
== EXCEPTION_SINGLE_STEP
)
1736 /* when single stepping can't tell whether this is a hw bp or a
1737 * single step interrupt. try to avoid as much overhead as possible
1738 * and only do a server call if there is any hw bp enabled. */
1740 if( !(context
->EFlags
& 0x100) || (ntdll_get_thread_data()->dr7
& 0xff) )
1742 /* (possible) hardware breakpoint, fetch the debug registers */
1743 context
->ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
1744 NtGetContextThread(GetCurrentThread(), context
);
1745 context
->ContextFlags
|= CONTEXT_FULL
; /* restore flags */
1748 context
->EFlags
&= ~0x100; /* clear single-step flag */
1751 status
= NtRaiseException( rec
, context
, TRUE
);
1752 raise_status( status
, rec
);
1756 /**********************************************************************
1757 * raise_generic_exception
1759 * Generic raise function for exceptions that don't need special treatment.
1761 static void WINAPI
raise_generic_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1765 status
= NtRaiseException( rec
, context
, TRUE
);
1766 raise_status( status
, rec
);
1771 /**********************************************************************
1772 * raise_vm86_sti_exception
1774 static void WINAPI
raise_vm86_sti_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1776 /* merge_vm86_pending_flags merges the vm86_pending flag in safely */
1777 get_vm86_teb_info()->vm86_pending
|= VIP_FLAG
;
1779 if (ntdll_get_thread_data()->vm86_ptr
)
1781 if (((char*)context
->Eip
>= (char*)vm86_return
) &&
1782 ((char*)context
->Eip
<= (char*)vm86_return_end
) &&
1783 (VM86_TYPE(context
->Eax
) != VM86_SIGNAL
)) {
1784 /* exiting from VM86, can't throw */
1787 merge_vm86_pending_flags( rec
);
1789 else if (get_vm86_teb_info()->dpmi_vif
&&
1790 !wine_ldt_is_system(context
->SegCs
) &&
1791 !wine_ldt_is_system(context
->SegSs
))
1793 /* Executing DPMI code and virtual interrupts are enabled. */
1794 get_vm86_teb_info()->vm86_pending
= 0;
1795 NtRaiseException( rec
, context
, TRUE
);
1798 set_cpu_context( context
);
1802 /**********************************************************************
1805 * Handler for SIGUSR2.
1806 * We use it to signal that the running __wine_enter_vm86() should
1807 * immediately set VIP_FLAG, causing pending events to be handled
1808 * as early as possible.
1810 static void usr2_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1812 EXCEPTION_RECORD
*rec
= setup_exception( sigcontext
, raise_vm86_sti_exception
);
1813 rec
->ExceptionCode
= EXCEPTION_VM86_STI
;
1815 #endif /* __HAVE_VM86 */
1818 /**********************************************************************
1821 * Handler for SIGSEGV and related errors.
1823 static void segv_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1826 EXCEPTION_RECORD
*rec
;
1827 SIGCONTEXT
*context
= sigcontext
;
1828 void *stack
= init_handler( sigcontext
, &fs
, &gs
);
1830 /* check for page fault inside the thread stack */
1831 if (get_trap_code(context
) == TRAP_x86_PAGEFLT
&&
1832 (char *)siginfo
->si_addr
>= (char *)NtCurrentTeb()->DeallocationStack
&&
1833 (char *)siginfo
->si_addr
< (char *)NtCurrentTeb()->Tib
.StackBase
&&
1834 virtual_handle_stack_fault( siginfo
->si_addr
))
1836 /* check if this was the last guard page */
1837 if ((char *)siginfo
->si_addr
< (char *)NtCurrentTeb()->DeallocationStack
+ 2*4096)
1839 rec
= setup_exception_record( context
, stack
, fs
, gs
, raise_segv_exception
);
1840 rec
->ExceptionCode
= EXCEPTION_STACK_OVERFLOW
;
1845 rec
= setup_exception_record( context
, stack
, fs
, gs
, raise_segv_exception
);
1846 if (rec
->ExceptionCode
== EXCEPTION_STACK_OVERFLOW
) return;
1848 switch(get_trap_code(context
))
1850 case TRAP_x86_OFLOW
: /* Overflow exception */
1851 rec
->ExceptionCode
= EXCEPTION_INT_OVERFLOW
;
1853 case TRAP_x86_BOUND
: /* Bound range exception */
1854 rec
->ExceptionCode
= EXCEPTION_ARRAY_BOUNDS_EXCEEDED
;
1856 case TRAP_x86_PRIVINFLT
: /* Invalid opcode exception */
1857 rec
->ExceptionCode
= EXCEPTION_ILLEGAL_INSTRUCTION
;
1859 case TRAP_x86_STKFLT
: /* Stack fault */
1860 rec
->ExceptionCode
= EXCEPTION_STACK_OVERFLOW
;
1862 case TRAP_x86_SEGNPFLT
: /* Segment not present exception */
1863 case TRAP_x86_PROTFLT
: /* General protection fault */
1864 case TRAP_x86_UNKNOWN
: /* Unknown fault code */
1866 WORD err
= get_error_code(context
);
1867 if (!err
&& (rec
->ExceptionCode
= is_privileged_instr( get_exception_context(rec
) ))) break;
1868 rec
->ExceptionCode
= EXCEPTION_ACCESS_VIOLATION
;
1869 rec
->NumberParameters
= 2;
1870 rec
->ExceptionInformation
[0] = 0;
1871 /* if error contains a LDT selector, use that as fault address */
1872 if ((err
& 7) == 4 && !wine_ldt_is_system( err
| 7 ))
1873 rec
->ExceptionInformation
[1] = err
& ~7;
1875 rec
->ExceptionInformation
[1] = 0xffffffff;
1878 case TRAP_x86_PAGEFLT
: /* Page fault */
1879 rec
->ExceptionCode
= EXCEPTION_ACCESS_VIOLATION
;
1880 rec
->NumberParameters
= 2;
1881 rec
->ExceptionInformation
[0] = (get_error_code(context
) >> 1) & 0x09;
1882 rec
->ExceptionInformation
[1] = (ULONG_PTR
)siginfo
->si_addr
;
1884 case TRAP_x86_ALIGNFLT
: /* Alignment check exception */
1885 rec
->ExceptionCode
= EXCEPTION_DATATYPE_MISALIGNMENT
;
1888 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context
) );
1890 case TRAP_x86_NMI
: /* NMI interrupt */
1891 case TRAP_x86_DNA
: /* Device not available exception */
1892 case TRAP_x86_DOUBLEFLT
: /* Double fault exception */
1893 case TRAP_x86_TSSFLT
: /* Invalid TSS exception */
1894 case TRAP_x86_MCHK
: /* Machine check exception */
1895 case TRAP_x86_CACHEFLT
: /* Cache flush exception */
1896 rec
->ExceptionCode
= EXCEPTION_ILLEGAL_INSTRUCTION
;
1902 /**********************************************************************
1905 * Handler for SIGTRAP.
1907 static void trap_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1909 SIGCONTEXT
*context
= sigcontext
;
1910 EXCEPTION_RECORD
*rec
= setup_exception( context
, raise_trap_exception
);
1912 switch(get_trap_code(context
))
1914 case TRAP_x86_TRCTRAP
: /* Single-step exception */
1915 rec
->ExceptionCode
= EXCEPTION_SINGLE_STEP
;
1917 case TRAP_x86_BPTFLT
: /* Breakpoint exception */
1918 rec
->ExceptionAddress
= (char *)rec
->ExceptionAddress
- 1; /* back up over the int3 instruction */
1921 rec
->ExceptionCode
= EXCEPTION_BREAKPOINT
;
1927 /**********************************************************************
1930 * Handler for SIGFPE.
1932 static void fpe_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1934 CONTEXT
*win_context
;
1935 SIGCONTEXT
*context
= sigcontext
;
1936 EXCEPTION_RECORD
*rec
= setup_exception( context
, raise_generic_exception
);
1938 win_context
= get_exception_context( rec
);
1940 switch(get_trap_code(context
))
1942 case TRAP_x86_DIVIDE
: /* Division by zero exception */
1943 rec
->ExceptionCode
= EXCEPTION_INT_DIVIDE_BY_ZERO
;
1945 case TRAP_x86_FPOPFLT
: /* Coprocessor segment overrun */
1946 rec
->ExceptionCode
= EXCEPTION_FLT_INVALID_OPERATION
;
1948 case TRAP_x86_ARITHTRAP
: /* Floating point exception */
1949 case TRAP_x86_UNKNOWN
: /* Unknown fault code */
1950 rec
->ExceptionCode
= get_fpu_code( win_context
);
1951 rec
->ExceptionAddress
= (LPVOID
)win_context
->FloatSave
.ErrorOffset
;
1953 case TRAP_x86_CACHEFLT
: /* SIMD exception */
1955 * Behaviour only tested for divide-by-zero exceptions
1956 * Check for other SIMD exceptions as well */
1957 if(siginfo
->si_code
!= FPE_FLTDIV
)
1958 FIXME("untested SIMD exception: %#x. Might not work correctly\n",
1961 rec
->ExceptionCode
= STATUS_FLOAT_MULTIPLE_TRAPS
;
1962 rec
->NumberParameters
= 1;
1963 /* no idea what meaning is actually behind this but that's what native does */
1964 rec
->ExceptionInformation
[0] = 0;
1967 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context
) );
1968 rec
->ExceptionCode
= EXCEPTION_FLT_INVALID_OPERATION
;
1974 /**********************************************************************
1977 * Handler for SIGINT.
1979 * FIXME: should not be calling external functions on the signal stack.
1981 static void int_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1984 init_handler( sigcontext
, &fs
, &gs
);
1985 if (!dispatch_signal(SIGINT
))
1987 EXCEPTION_RECORD
*rec
= setup_exception( sigcontext
, raise_generic_exception
);
1988 rec
->ExceptionCode
= CONTROL_C_EXIT
;
1992 /**********************************************************************
1995 * Handler for SIGABRT.
1997 static void abrt_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
1999 EXCEPTION_RECORD
*rec
= setup_exception( sigcontext
, raise_generic_exception
);
2000 rec
->ExceptionCode
= EXCEPTION_WINE_ASSERTION
;
2001 rec
->ExceptionFlags
= EH_NONCONTINUABLE
;
2005 /**********************************************************************
2008 * Handler for SIGQUIT.
2010 static void quit_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
2013 init_handler( sigcontext
, &fs
, &gs
);
2018 /**********************************************************************
2021 * Handler for SIGUSR1, used to signal a thread that it got suspended.
2023 static void usr1_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
2028 init_handler( sigcontext
, &fs
, &gs
);
2029 save_context( &context
, sigcontext
, fs
, gs
);
2030 wait_suspend( &context
);
2031 restore_context( &context
, sigcontext
);
2035 /***********************************************************************
2036 * __wine_set_signal_handler (NTDLL.@)
2038 int CDECL
__wine_set_signal_handler(unsigned int sig
, wine_signal_handler wsh
)
2040 if (sig
>= sizeof(handlers
) / sizeof(handlers
[0])) return -1;
2041 if (handlers
[sig
] != NULL
) return -2;
2042 handlers
[sig
] = wsh
;
2047 /***********************************************************************
2048 * locking for LDT routines
2050 static RTL_CRITICAL_SECTION ldt_section
;
2051 static RTL_CRITICAL_SECTION_DEBUG critsect_debug
=
2054 { &critsect_debug
.ProcessLocksList
, &critsect_debug
.ProcessLocksList
},
2055 0, 0, { (DWORD_PTR
)(__FILE__
": ldt_section") }
2057 static RTL_CRITICAL_SECTION ldt_section
= { &critsect_debug
, -1, 0, 0, 0, 0 };
2058 static sigset_t ldt_sigset
;
2060 static void ldt_lock(void)
2064 pthread_sigmask( SIG_BLOCK
, &server_block_set
, &sigset
);
2065 RtlEnterCriticalSection( &ldt_section
);
2066 if (ldt_section
.RecursionCount
== 1) ldt_sigset
= sigset
;
2069 static void ldt_unlock(void)
2071 if (ldt_section
.RecursionCount
== 1)
2073 sigset_t sigset
= ldt_sigset
;
2074 RtlLeaveCriticalSection( &ldt_section
);
2075 pthread_sigmask( SIG_SETMASK
, &sigset
, NULL
);
2077 else RtlLeaveCriticalSection( &ldt_section
);
2081 /**********************************************************************
2082 * signal_alloc_thread
2084 NTSTATUS
signal_alloc_thread( TEB
**teb
)
2086 static size_t sigstack_zero_bits
;
2087 struct ntdll_thread_data
*thread_data
;
2088 struct ntdll_thread_data
*parent_data
= NULL
;
2093 if (!sigstack_zero_bits
)
2095 size_t min_size
= teb_size
+ max( MINSIGSTKSZ
, 8192 );
2096 /* find the first power of two not smaller than min_size */
2097 sigstack_zero_bits
= 12;
2098 while ((1u << sigstack_zero_bits
) < min_size
) sigstack_zero_bits
++;
2099 signal_stack_mask
= (1 << sigstack_zero_bits
) - 1;
2100 signal_stack_size
= (1 << sigstack_zero_bits
) - teb_size
;
2102 else parent_data
= ntdll_get_thread_data();
2104 size
= signal_stack_mask
+ 1;
2105 if (!(status
= NtAllocateVirtualMemory( NtCurrentProcess(), &addr
, sigstack_zero_bits
,
2106 &size
, MEM_COMMIT
| MEM_TOP_DOWN
, PAGE_READWRITE
)))
2109 (*teb
)->Tib
.Self
= &(*teb
)->Tib
;
2110 (*teb
)->Tib
.ExceptionList
= (void *)~0UL;
2111 thread_data
= (struct ntdll_thread_data
*)(*teb
)->SpareBytes1
;
2112 if (!(thread_data
->fs
= wine_ldt_alloc_fs()))
2115 NtFreeVirtualMemory( NtCurrentProcess(), &addr
, &size
, MEM_RELEASE
);
2116 status
= STATUS_TOO_MANY_THREADS
;
2120 /* inherit debug registers from parent thread */
2121 thread_data
->dr0
= parent_data
->dr0
;
2122 thread_data
->dr1
= parent_data
->dr1
;
2123 thread_data
->dr2
= parent_data
->dr2
;
2124 thread_data
->dr3
= parent_data
->dr3
;
2125 thread_data
->dr6
= parent_data
->dr6
;
2126 thread_data
->dr7
= parent_data
->dr7
;
2134 /**********************************************************************
2135 * signal_free_thread
2137 void signal_free_thread( TEB
*teb
)
2140 struct ntdll_thread_data
*thread_data
= (struct ntdll_thread_data
*)teb
->SpareBytes1
;
2142 if (thread_data
) wine_ldt_free_fs( thread_data
->fs
);
2143 if (teb
->DeallocationStack
)
2146 NtFreeVirtualMemory( GetCurrentProcess(), &teb
->DeallocationStack
, &size
, MEM_RELEASE
);
2149 NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb
, &size
, MEM_RELEASE
);
2153 /**********************************************************************
2154 * signal_init_thread
2156 void signal_init_thread( TEB
*teb
)
2158 const WORD fpu_cw
= 0x27f;
2159 struct ntdll_thread_data
*thread_data
= (struct ntdll_thread_data
*)teb
->SpareBytes1
;
2164 int mib
[2], val
= 1;
2167 mib
[1] = KERN_THALTSTACK
;
2168 sysctl( mib
, 2, NULL
, NULL
, &val
, sizeof(val
) );
2171 ss
.ss_sp
= (char *)teb
+ teb_size
;
2172 ss
.ss_size
= signal_stack_size
;
2174 if (sigaltstack(&ss
, NULL
) == -1) perror( "sigaltstack" );
2176 wine_ldt_set_base( &fs_entry
, teb
);
2177 wine_ldt_set_limit( &fs_entry
, teb_size
- 1 );
2178 wine_ldt_set_flags( &fs_entry
, WINE_LDT_FLAGS_DATA
|WINE_LDT_FLAGS_32BIT
);
2179 wine_ldt_init_fs( thread_data
->fs
, &fs_entry
);
2180 thread_data
->gs
= wine_get_gs();
2183 __asm__
volatile ("fninit; fldcw %0" : : "m" (fpu_cw
));
2185 FIXME("FPU setup not implemented for this platform.\n");
2189 /**********************************************************************
2190 * signal_init_process
2192 void signal_init_process(void)
2194 struct sigaction sig_act
;
2196 sig_act
.sa_mask
= server_block_set
;
2197 sig_act
.sa_flags
= SA_SIGINFO
| SA_RESTART
;
2199 sig_act
.sa_flags
|= SA_ONSTACK
;
2202 sig_act
.sa_sigaction
= int_handler
;
2203 if (sigaction( SIGINT
, &sig_act
, NULL
) == -1) goto error
;
2204 sig_act
.sa_sigaction
= fpe_handler
;
2205 if (sigaction( SIGFPE
, &sig_act
, NULL
) == -1) goto error
;
2206 sig_act
.sa_sigaction
= abrt_handler
;
2207 if (sigaction( SIGABRT
, &sig_act
, NULL
) == -1) goto error
;
2208 sig_act
.sa_sigaction
= quit_handler
;
2209 if (sigaction( SIGQUIT
, &sig_act
, NULL
) == -1) goto error
;
2210 sig_act
.sa_sigaction
= usr1_handler
;
2211 if (sigaction( SIGUSR1
, &sig_act
, NULL
) == -1) goto error
;
2213 sig_act
.sa_sigaction
= segv_handler
;
2214 if (sigaction( SIGSEGV
, &sig_act
, NULL
) == -1) goto error
;
2215 if (sigaction( SIGILL
, &sig_act
, NULL
) == -1) goto error
;
2217 if (sigaction( SIGBUS
, &sig_act
, NULL
) == -1) goto error
;
2221 sig_act
.sa_sigaction
= trap_handler
;
2222 if (sigaction( SIGTRAP
, &sig_act
, NULL
) == -1) goto error
;
2226 sig_act
.sa_sigaction
= usr2_handler
;
2227 if (sigaction( SIGUSR2
, &sig_act
, NULL
) == -1) goto error
;
2230 wine_ldt_init_locking( ldt_lock
, ldt_unlock
);
2234 perror("sigaction");
2240 /**********************************************************************
2241 * __wine_enter_vm86 (NTDLL.@)
2243 * Enter vm86 mode with the specified register context.
2245 void __wine_enter_vm86( CONTEXT
*context
)
2247 EXCEPTION_RECORD rec
;
2249 struct vm86plus_struct vm86
;
2251 memset( &vm86
, 0, sizeof(vm86
) );
2254 restore_vm86_context( context
, &vm86
);
2256 ntdll_get_thread_data()->vm86_ptr
= &vm86
;
2257 merge_vm86_pending_flags( &rec
);
2259 res
= vm86_enter( &ntdll_get_thread_data()->vm86_ptr
); /* uses and clears teb->vm86_ptr */
2266 save_vm86_context( context
, &vm86
);
2268 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
2269 rec
.ExceptionRecord
= NULL
;
2270 rec
.ExceptionAddress
= (LPVOID
)context
->Eip
;
2271 rec
.NumberParameters
= 0;
2273 switch(VM86_TYPE(res
))
2275 case VM86_UNKNOWN
: /* unhandled GP fault - IO-instruction or similar */
2276 rec
.ExceptionCode
= EXCEPTION_PRIV_INSTRUCTION
;
2278 case VM86_TRAP
: /* return due to DOS-debugger request */
2279 switch(VM86_ARG(res
))
2281 case TRAP_x86_TRCTRAP
: /* Single-step exception */
2282 rec
.ExceptionCode
= EXCEPTION_SINGLE_STEP
;
2284 case TRAP_x86_BPTFLT
: /* Breakpoint exception */
2285 rec
.ExceptionAddress
= (char *)rec
.ExceptionAddress
- 1; /* back up over the int3 instruction */
2288 rec
.ExceptionCode
= EXCEPTION_BREAKPOINT
;
2292 case VM86_INTx
: /* int3/int x instruction (ARG = x) */
2293 rec
.ExceptionCode
= EXCEPTION_VM86_INTx
;
2294 rec
.NumberParameters
= 1;
2295 rec
.ExceptionInformation
[0] = VM86_ARG(res
);
2297 case VM86_STI
: /* sti/popf/iret instruction enabled virtual interrupts */
2298 context
->EFlags
|= VIF_FLAG
;
2299 context
->EFlags
&= ~VIP_FLAG
;
2300 get_vm86_teb_info()->vm86_pending
= 0;
2301 rec
.ExceptionCode
= EXCEPTION_VM86_STI
;
2303 case VM86_PICRETURN
: /* return due to pending PIC request */
2304 rec
.ExceptionCode
= EXCEPTION_VM86_PICRETURN
;
2306 case VM86_SIGNAL
: /* cannot happen because vm86_enter handles this case */
2308 WINE_ERR( "unhandled result from vm86 mode %x\n", res
);
2311 raise_exception( &rec
, context
, TRUE
);
2315 #else /* __HAVE_VM86 */
2316 /**********************************************************************
2317 * __wine_enter_vm86 (NTDLL.@)
2319 void __wine_enter_vm86( CONTEXT
*context
)
2321 MESSAGE("vm86 mode not supported on this platform\n");
2323 #endif /* __HAVE_VM86 */
2326 /*******************************************************************
2327 * RtlUnwind (NTDLL.@)
2329 void WINAPI
__regs_RtlUnwind( EXCEPTION_REGISTRATION_RECORD
* pEndFrame
, PVOID targetIp
,
2330 PEXCEPTION_RECORD pRecord
, PVOID retval
, CONTEXT
*context
)
2332 EXCEPTION_RECORD record
;
2333 EXCEPTION_REGISTRATION_RECORD
*frame
, *dispatch
;
2336 context
->Eax
= (DWORD
)retval
;
2338 /* build an exception record, if we do not have one */
2341 record
.ExceptionCode
= STATUS_UNWIND
;
2342 record
.ExceptionFlags
= 0;
2343 record
.ExceptionRecord
= NULL
;
2344 record
.ExceptionAddress
= (void *)context
->Eip
;
2345 record
.NumberParameters
= 0;
2349 pRecord
->ExceptionFlags
|= EH_UNWINDING
| (pEndFrame
? 0 : EH_EXIT_UNWIND
);
2351 TRACE( "code=%x flags=%x\n", pRecord
->ExceptionCode
, pRecord
->ExceptionFlags
);
2353 /* get chain of exception frames */
2354 frame
= NtCurrentTeb()->Tib
.ExceptionList
;
2355 while ((frame
!= (EXCEPTION_REGISTRATION_RECORD
*)~0UL) && (frame
!= pEndFrame
))
2357 /* Check frame address */
2358 if (pEndFrame
&& (frame
> pEndFrame
))
2359 raise_status( STATUS_INVALID_UNWIND_TARGET
, pRecord
);
2361 if (((void*)frame
< NtCurrentTeb()->Tib
.StackLimit
) ||
2362 ((void*)(frame
+1) > NtCurrentTeb()->Tib
.StackBase
) ||
2363 (UINT_PTR
)frame
& 3)
2364 raise_status( STATUS_BAD_STACK
, pRecord
);
2367 TRACE( "calling handler at %p code=%x flags=%x\n",
2368 frame
->Handler
, pRecord
->ExceptionCode
, pRecord
->ExceptionFlags
);
2369 res
= EXC_CallHandler( pRecord
, frame
, context
, &dispatch
, frame
->Handler
, unwind_handler
);
2370 TRACE( "handler at %p returned %x\n", frame
->Handler
, res
);
2374 case ExceptionContinueSearch
:
2376 case ExceptionCollidedUnwind
:
2380 raise_status( STATUS_INVALID_DISPOSITION
, pRecord
);
2383 frame
= __wine_pop_frame( frame
);
2386 DEFINE_REGS_ENTRYPOINT( RtlUnwind
, 4 )
2389 /*******************************************************************
2390 * NtRaiseException (NTDLL.@)
2392 NTSTATUS WINAPI
NtRaiseException( EXCEPTION_RECORD
*rec
, CONTEXT
*context
, BOOL first_chance
)
2394 NTSTATUS status
= raise_exception( rec
, context
, first_chance
);
2395 if (status
== STATUS_SUCCESS
)
2397 set_debug_registers( context
);
2398 set_cpu_context( context
);
2404 /***********************************************************************
2405 * RtlRaiseException (NTDLL.@)
2407 void WINAPI
__regs_RtlRaiseException( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
2411 rec
->ExceptionAddress
= (void *)context
->Eip
;
2412 status
= raise_exception( rec
, context
, TRUE
);
2413 if (status
!= STATUS_SUCCESS
) raise_status( status
, rec
);
2415 DEFINE_REGS_ENTRYPOINT( RtlRaiseException
, 1 )
2418 /*************************************************************************
2419 * RtlCaptureStackBackTrace (NTDLL.@)
2421 USHORT WINAPI
RtlCaptureStackBackTrace( ULONG skip
, ULONG count
, PVOID
*buffer
, ULONG
*hash
)
2427 RtlCaptureContext( &context
);
2428 if (hash
) *hash
= 0;
2429 frame
= (ULONG
*)context
.Ebp
;
2433 if (((void *)frame
< NtCurrentTeb()->Tib
.StackLimit
) ||
2434 ((void *)(frame
+ 1) >= NtCurrentTeb()->Tib
.StackBase
)) return 0;
2435 frame
= (ULONG
*)*frame
;
2438 for (i
= 0; i
< count
; i
++)
2440 if (((void *)frame
< NtCurrentTeb()->Tib
.StackLimit
) ||
2441 ((void *)(frame
+ 1) >= NtCurrentTeb()->Tib
.StackBase
)) break;
2442 buffer
[i
] = (void *)frame
[1];
2443 if (hash
) *hash
+= frame
[1];
2444 frame
= (ULONG
*)*frame
;
2450 /* wrapper for apps that don't declare the thread function correctly */
2451 extern void DECLSPEC_NORETURN
call_thread_func( LPTHREAD_START_ROUTINE entry
, void *arg
);
2452 __ASM_GLOBAL_FUNC(call_thread_func
,
2454 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2455 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2456 "movl %esp,%ebp\n\t"
2457 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2459 "pushl 12(%ebp)\n\t"
2461 "leal -4(%ebp),%esp\n\t"
2463 "call " __ASM_NAME("exit_thread") "\n\t"
2466 /***********************************************************************
2467 * call_thread_entry_point
2469 void call_thread_entry_point( LPTHREAD_START_ROUTINE entry
, void *arg
)
2473 call_thread_func( entry
, arg
);
2475 __EXCEPT(unhandled_exception_filter
)
2477 NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
2480 abort(); /* should not be reached */
2483 /***********************************************************************
2484 * RtlExitUserThread (NTDLL.@)
2486 void WINAPI
RtlExitUserThread( ULONG status
)
2488 exit_thread( status
);
2491 /***********************************************************************
2494 void abort_thread( int status
)
2496 terminate_thread( status
);
2499 /**********************************************************************
2500 * DbgBreakPoint (NTDLL.@)
2502 __ASM_STDCALL_FUNC( DbgBreakPoint
, 0, "int $3; ret")
2504 /**********************************************************************
2505 * DbgUserBreakPoint (NTDLL.@)
2507 __ASM_STDCALL_FUNC( DbgUserBreakPoint
, 0, "int $3; ret")
2509 /**********************************************************************
2510 * NtCurrentTeb (NTDLL.@)
2512 __ASM_STDCALL_FUNC( NtCurrentTeb
, 0, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" )
2515 /**********************************************************************
2516 * EXC_CallHandler (internal)
2518 * Some exception handlers depend on EBP to have a fixed position relative to
2519 * the exception frame.
2520 * Shrinker depends on (*1) doing what it does,
2521 * (*2) being the exact instruction it is and (*3) beginning with 0x64
2522 * (i.e. the %fs prefix to the movl instruction). It also depends on the
2523 * function calling the handler having only 5 parameters (*4).
2525 __ASM_GLOBAL_FUNC( EXC_CallHandler
,
2527 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2528 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2529 "movl %esp,%ebp\n\t"
2530 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2532 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2533 "movl 28(%ebp), %edx\n\t" /* ugly hack to pass the 6th param needed because of Shrinker */
2534 "pushl 24(%ebp)\n\t"
2535 "pushl 20(%ebp)\n\t"
2536 "pushl 16(%ebp)\n\t"
2537 "pushl 12(%ebp)\n\t"
2539 "call " __ASM_NAME("call_exception_handler") "\n\t"
2541 __ASM_CFI(".cfi_same_value %ebx\n\t")
2543 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2544 __ASM_CFI(".cfi_same_value %ebp\n\t")
2546 __ASM_GLOBAL_FUNC(call_exception_handler
,
2548 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2549 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2550 "movl %esp,%ebp\n\t"
2551 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2553 "pushl 12(%ebp)\n\t" /* make any exceptions in this... */
2554 "pushl %edx\n\t" /* handler be handled by... */
2556 "pushl (0)\n\t" /* nested_handler (passed in edx). */
2558 "movl %esp,(0)\n\t" /* push the new exception frame onto the exception stack. */
2559 "pushl 20(%ebp)\n\t"
2560 "pushl 16(%ebp)\n\t"
2561 "pushl 12(%ebp)\n\t"
2563 "movl 24(%ebp), %ecx\n\t" /* (*1) */
2564 "call *%ecx\n\t" /* call handler. (*2) */
2566 "movl (0), %esp\n\t" /* restore previous... (*3) */
2568 "popl (0)\n\t" /* exception frame. */
2569 "movl %ebp, %esp\n\t" /* restore saved stack, in case it was corrupted */
2571 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2572 __ASM_CFI(".cfi_same_value %ebp\n\t")
2573 "ret $20" ) /* (*4) */
2575 #endif /* __i386__ */