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>
35 #ifdef HAVE_SYS_PARAM_H
36 # include <sys/param.h>
41 # ifdef HAVE_SYS_SYSCALL_H
42 # include <sys/syscall.h>
45 #ifdef HAVE_SYS_VM86_H
46 # include <sys/vm86.h>
48 #ifdef HAVE_SYS_SIGNAL_H
49 # include <sys/signal.h>
51 #ifdef HAVE_SYS_SYSCTL_H
52 # include <sys/sysctl.h>
54 #ifdef HAVE_SYS_UCONTEXT_H
55 # include <sys/ucontext.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 #ifndef HAVE_SYS_UCONTEXT_H
109 REG_GS
, REG_FS
, REG_ES
, REG_DS
, REG_EDI
, REG_ESI
, REG_EBP
, REG_ESP
,
110 REG_EBX
, REG_EDX
, REG_ECX
, REG_EAX
, REG_TRAPNO
, REG_ERR
, REG_EIP
,
111 REG_CS
, REG_EFL
, REG_UESP
, REG_SS
, NGREG
115 typedef greg_t gregset_t
[NGREG
];
119 unsigned short significand
[4];
120 unsigned short exponent
;
130 unsigned long dataoff
;
131 unsigned long datasel
;
132 struct _libc_fpreg _st
[8];
133 unsigned long status
;
136 typedef struct _libc_fpstate
* fpregset_t
;
142 unsigned long oldmask
;
146 typedef struct ucontext
148 unsigned long uc_flags
;
149 struct ucontext
*uc_link
;
151 mcontext_t uc_mcontext
;
154 #endif /* HAVE_SYS_UCONTEXT_H */
156 #define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX])
157 #define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX])
158 #define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX])
159 #define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX])
160 #define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI])
161 #define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI])
162 #define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP])
163 #define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP])
165 #define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS])
166 #define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS])
167 #define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES])
168 #define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS])
169 #define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS])
170 #define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS])
172 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
173 #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
174 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
175 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
177 #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->uc_mcontext.fpregs))
178 #define FPUX_sig(context) (FPU_sig(context) && !((context)->uc_mcontext.fpregs->status >> 16) ? (XMM_SAVE_AREA32 *)(FPU_sig(context) + 1) : NULL)
180 #define VIF_FLAG 0x00080000
181 #define VIP_FLAG 0x00100000
183 int vm86_enter( void **vm86_ptr
);
184 void vm86_return(void);
185 void vm86_return_end(void);
186 __ASM_GLOBAL_FUNC(vm86_enter
,
188 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
189 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
191 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
193 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
194 "movl $166,%eax\n\t" /*SYS_vm86*/
195 "movl 8(%ebp),%ecx\n\t" /* vm86_ptr */
196 "movl (%ecx),%ecx\n\t"
197 "movl $1,%ebx\n\t" /*VM86_ENTER*/
198 "pushl %ecx\n\t" /* put vm86plus_struct ptr somewhere we can find it */
202 ".globl " __ASM_NAME("vm86_return") "\n\t"
203 __ASM_FUNC("vm86_return") "\n"
204 __ASM_NAME("vm86_return") ":\n\t"
209 __ASM_CFI(".cfi_same_value %ebx\n\t")
211 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
212 __ASM_CFI(".cfi_same_value %ebp\n\t")
213 "testl %eax,%eax\n\t"
215 "cmpb $0,%al\n\t" /* VM86_SIGNAL */
216 "je " __ASM_NAME("vm86_enter") "\n\t"
218 "movl 4(%esp),%ecx\n\t" /* vm86_ptr */
220 ".globl " __ASM_NAME("vm86_return_end") "\n\t"
221 __ASM_FUNC("vm86_return_end") "\n"
222 __ASM_NAME("vm86_return_end") ":\n\t"
225 #ifdef HAVE_SYS_VM86_H
230 /* custom signal restorer since we may have unmapped the one in vdso, and bionic doesn't check for that */
231 void rt_sigreturn(void);
232 __ASM_GLOBAL_FUNC( rt_sigreturn
,
233 "movl $173,%eax\n\t" /* NR_rt_sigreturn */
237 #elif defined (__BSDI__)
239 #include <machine/frame.h>
240 typedef struct trapframe ucontext_t
;
242 #define EAX_sig(context) ((context)->tf_eax)
243 #define EBX_sig(context) ((context)->tf_ebx)
244 #define ECX_sig(context) ((context)->tf_ecx)
245 #define EDX_sig(context) ((context)->tf_edx)
246 #define ESI_sig(context) ((context)->tf_esi)
247 #define EDI_sig(context) ((context)->tf_edi)
248 #define EBP_sig(context) ((context)->tf_ebp)
250 #define CS_sig(context) ((context)->tf_cs)
251 #define DS_sig(context) ((context)->tf_ds)
252 #define ES_sig(context) ((context)->tf_es)
253 #define SS_sig(context) ((context)->tf_ss)
255 #define EFL_sig(context) ((context)->tf_eflags)
257 #define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
258 #define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
260 #define FPU_sig(context) NULL /* FIXME */
261 #define FPUX_sig(context) NULL /* FIXME */
263 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
265 #include <machine/trap.h>
267 #define EAX_sig(context) ((context)->uc_mcontext.mc_eax)
268 #define EBX_sig(context) ((context)->uc_mcontext.mc_ebx)
269 #define ECX_sig(context) ((context)->uc_mcontext.mc_ecx)
270 #define EDX_sig(context) ((context)->uc_mcontext.mc_edx)
271 #define ESI_sig(context) ((context)->uc_mcontext.mc_esi)
272 #define EDI_sig(context) ((context)->uc_mcontext.mc_edi)
273 #define EBP_sig(context) ((context)->uc_mcontext.mc_ebp)
275 #define CS_sig(context) ((context)->uc_mcontext.mc_cs)
276 #define DS_sig(context) ((context)->uc_mcontext.mc_ds)
277 #define ES_sig(context) ((context)->uc_mcontext.mc_es)
278 #define FS_sig(context) ((context)->uc_mcontext.mc_fs)
279 #define GS_sig(context) ((context)->uc_mcontext.mc_gs)
280 #define SS_sig(context) ((context)->uc_mcontext.mc_ss)
282 #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
283 #define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
284 #define EFL_sig(context) ((context)->uc_mcontext.mc_eflags)
286 #define EIP_sig(context) ((context)->uc_mcontext.mc_eip)
287 #define ESP_sig(context) ((context)->uc_mcontext.mc_esp)
289 #define FPU_sig(context) NULL /* FIXME */
290 #define FPUX_sig(context) NULL /* FIXME */
292 #elif defined (__OpenBSD__)
294 #define EAX_sig(context) ((context)->sc_eax)
295 #define EBX_sig(context) ((context)->sc_ebx)
296 #define ECX_sig(context) ((context)->sc_ecx)
297 #define EDX_sig(context) ((context)->sc_edx)
298 #define ESI_sig(context) ((context)->sc_esi)
299 #define EDI_sig(context) ((context)->sc_edi)
300 #define EBP_sig(context) ((context)->sc_ebp)
302 #define CS_sig(context) ((context)->sc_cs)
303 #define DS_sig(context) ((context)->sc_ds)
304 #define ES_sig(context) ((context)->sc_es)
305 #define FS_sig(context) ((context)->sc_fs)
306 #define GS_sig(context) ((context)->sc_gs)
307 #define SS_sig(context) ((context)->sc_ss)
309 #define TRAP_sig(context) ((context)->sc_trapno)
310 #define ERROR_sig(context) ((context)->sc_err)
311 #define EFL_sig(context) ((context)->sc_eflags)
313 #define EIP_sig(context) ((context)->sc_eip)
314 #define ESP_sig(context) ((context)->sc_esp)
316 #define FPU_sig(context) NULL /* FIXME */
317 #define FPUX_sig(context) NULL /* FIXME */
319 #define T_MCHK T_MACHK
320 #define T_XMMFLT T_XFTRAP
322 #elif defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
325 #include <sys/regset.h>
329 #define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
330 #define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
331 #define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
332 #define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
333 #define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
334 #define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
335 #define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
337 #define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
338 #define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
339 #define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
340 #define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
342 #define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
343 #define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
345 #define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
347 #define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
349 #define ESP_sig(context) ((context)->uc_mcontext.gregs[UESP])
351 #define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
353 #define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
356 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[ERR])
359 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
362 #define FPU_sig(context) NULL /* FIXME */
363 #define FPUX_sig(context) NULL /* FIXME */
365 #elif defined (__APPLE__)
367 /* work around silly renaming of struct members in OS X 10.5 */
368 #if __DARWIN_UNIX03 && defined(_STRUCT_X86_EXCEPTION_STATE32)
369 #define EAX_sig(context) ((context)->uc_mcontext->__ss.__eax)
370 #define EBX_sig(context) ((context)->uc_mcontext->__ss.__ebx)
371 #define ECX_sig(context) ((context)->uc_mcontext->__ss.__ecx)
372 #define EDX_sig(context) ((context)->uc_mcontext->__ss.__edx)
373 #define ESI_sig(context) ((context)->uc_mcontext->__ss.__esi)
374 #define EDI_sig(context) ((context)->uc_mcontext->__ss.__edi)
375 #define EBP_sig(context) ((context)->uc_mcontext->__ss.__ebp)
376 #define CS_sig(context) ((context)->uc_mcontext->__ss.__cs)
377 #define DS_sig(context) ((context)->uc_mcontext->__ss.__ds)
378 #define ES_sig(context) ((context)->uc_mcontext->__ss.__es)
379 #define FS_sig(context) ((context)->uc_mcontext->__ss.__fs)
380 #define GS_sig(context) ((context)->uc_mcontext->__ss.__gs)
381 #define SS_sig(context) ((context)->uc_mcontext->__ss.__ss)
382 #define EFL_sig(context) ((context)->uc_mcontext->__ss.__eflags)
383 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__eip))
384 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__esp))
385 #define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno)
386 #define ERROR_sig(context) ((context)->uc_mcontext->__es.__err)
387 #define FPU_sig(context) NULL
388 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->__fs.__fpu_fcw)
390 #define EAX_sig(context) ((context)->uc_mcontext->ss.eax)
391 #define EBX_sig(context) ((context)->uc_mcontext->ss.ebx)
392 #define ECX_sig(context) ((context)->uc_mcontext->ss.ecx)
393 #define EDX_sig(context) ((context)->uc_mcontext->ss.edx)
394 #define ESI_sig(context) ((context)->uc_mcontext->ss.esi)
395 #define EDI_sig(context) ((context)->uc_mcontext->ss.edi)
396 #define EBP_sig(context) ((context)->uc_mcontext->ss.ebp)
397 #define CS_sig(context) ((context)->uc_mcontext->ss.cs)
398 #define DS_sig(context) ((context)->uc_mcontext->ss.ds)
399 #define ES_sig(context) ((context)->uc_mcontext->ss.es)
400 #define FS_sig(context) ((context)->uc_mcontext->ss.fs)
401 #define GS_sig(context) ((context)->uc_mcontext->ss.gs)
402 #define SS_sig(context) ((context)->uc_mcontext->ss.ss)
403 #define EFL_sig(context) ((context)->uc_mcontext->ss.eflags)
404 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip))
405 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.esp))
406 #define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
407 #define ERROR_sig(context) ((context)->uc_mcontext->es.err)
408 #define FPU_sig(context) NULL
409 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->fs.fpu_fcw)
412 #elif defined(__NetBSD__)
414 #define EAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EAX])
415 #define EBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBX])
416 #define ECX_sig(context) ((context)->uc_mcontext.__gregs[_REG_ECX])
417 #define EDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDX])
418 #define ESI_sig(context) ((context)->uc_mcontext.__gregs[_REG_ESI])
419 #define EDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDI])
420 #define EBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBP])
421 #define ESP_sig(context) _UC_MACHINE_SP(context)
423 #define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
424 #define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
425 #define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
426 #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
427 #define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
428 #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
430 #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_EFL])
431 #define EIP_sig(context) _UC_MACHINE_PC(context)
432 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
433 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
435 #define FPU_sig(context) NULL
436 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&((context)->uc_mcontext.__fpregs))
439 #define T_XMMFLT T_XMM
441 #elif defined(__GNU__)
443 #define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX])
444 #define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX])
445 #define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX])
446 #define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX])
447 #define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI])
448 #define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI])
449 #define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP])
450 #define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP])
452 #define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS])
453 #define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS])
454 #define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES])
455 #define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS])
456 #define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS])
457 #define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS])
459 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
460 #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
461 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
462 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
464 #define FPU_sig(context) ((FLOATING_SAVE_AREA *)&(context)->uc_mcontext.fpregs.fp_reg_set.fpchip_state)
465 #define FPUX_sig(context) NULL
468 #error You must define the signal context functions for your platform
471 WINE_DEFAULT_DEBUG_CHANNEL(seh
);
473 typedef int (*wine_signal_handler
)(unsigned int sig
);
475 static const size_t teb_size
= 4096; /* we reserve one page for the TEB */
476 static size_t signal_stack_mask
;
477 static size_t signal_stack_size
;
479 static wine_signal_handler handlers
[256];
481 static BOOL fpux_support
; /* whether the CPU supports extended fpu context */
483 extern void DECLSPEC_NORETURN
__wine_restore_regs( const CONTEXT
*context
);
487 TRAP_x86_UNKNOWN
= -1, /* Unknown fault (TRAP_sig not defined) */
488 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
489 TRAP_x86_DIVIDE
= T_DIVIDE
, /* Division by zero exception */
490 TRAP_x86_TRCTRAP
= T_TRCTRAP
, /* Single-step exception */
491 TRAP_x86_NMI
= T_NMI
, /* NMI interrupt */
492 TRAP_x86_BPTFLT
= T_BPTFLT
, /* Breakpoint exception */
493 TRAP_x86_OFLOW
= T_OFLOW
, /* Overflow exception */
494 TRAP_x86_BOUND
= T_BOUND
, /* Bound range exception */
495 TRAP_x86_PRIVINFLT
= T_PRIVINFLT
, /* Invalid opcode exception */
496 TRAP_x86_DNA
= T_DNA
, /* Device not available exception */
497 TRAP_x86_DOUBLEFLT
= T_DOUBLEFLT
, /* Double fault exception */
498 TRAP_x86_FPOPFLT
= T_FPOPFLT
, /* Coprocessor segment overrun */
499 TRAP_x86_TSSFLT
= T_TSSFLT
, /* Invalid TSS exception */
500 TRAP_x86_SEGNPFLT
= T_SEGNPFLT
, /* Segment not present exception */
501 TRAP_x86_STKFLT
= T_STKFLT
, /* Stack fault */
502 TRAP_x86_PROTFLT
= T_PROTFLT
, /* General protection fault */
503 TRAP_x86_PAGEFLT
= T_PAGEFLT
, /* Page fault */
504 TRAP_x86_ARITHTRAP
= T_ARITHTRAP
, /* Floating point exception */
505 TRAP_x86_ALIGNFLT
= T_ALIGNFLT
, /* Alignment check exception */
506 TRAP_x86_MCHK
= T_MCHK
, /* Machine check exception */
507 TRAP_x86_CACHEFLT
= T_XMMFLT
/* Cache flush exception */
509 TRAP_x86_DIVIDE
= 0, /* Division by zero exception */
510 TRAP_x86_TRCTRAP
= 1, /* Single-step exception */
511 TRAP_x86_NMI
= 2, /* NMI interrupt */
512 TRAP_x86_BPTFLT
= 3, /* Breakpoint exception */
513 TRAP_x86_OFLOW
= 4, /* Overflow exception */
514 TRAP_x86_BOUND
= 5, /* Bound range exception */
515 TRAP_x86_PRIVINFLT
= 6, /* Invalid opcode exception */
516 TRAP_x86_DNA
= 7, /* Device not available exception */
517 TRAP_x86_DOUBLEFLT
= 8, /* Double fault exception */
518 TRAP_x86_FPOPFLT
= 9, /* Coprocessor segment overrun */
519 TRAP_x86_TSSFLT
= 10, /* Invalid TSS exception */
520 TRAP_x86_SEGNPFLT
= 11, /* Segment not present exception */
521 TRAP_x86_STKFLT
= 12, /* Stack fault */
522 TRAP_x86_PROTFLT
= 13, /* General protection fault */
523 TRAP_x86_PAGEFLT
= 14, /* Page fault */
524 TRAP_x86_ARITHTRAP
= 16, /* Floating point exception */
525 TRAP_x86_ALIGNFLT
= 17, /* Alignment check exception */
526 TRAP_x86_MCHK
= 18, /* Machine check exception */
527 TRAP_x86_CACHEFLT
= 19 /* SIMD exception (via SIGFPE) if CPU is SSE capable
528 otherwise Cache flush exception (via SIGSEV) */
532 struct x86_thread_data
534 DWORD fs
; /* 1d4 TEB selector */
535 DWORD gs
; /* 1d8 libc selector; update winebuild if you move this! */
536 DWORD dr0
; /* 1dc debug registers */
542 void *exit_frame
; /* 1f4 exit frame pointer */
544 void *vm86_ptr
; /* 1f8 data for vm86 mode */
545 WINE_VM86_TEB_INFO vm86
; /* 1fc vm86 private data */
547 /* the ntdll_thread_data structure follows here */
550 C_ASSERT( offsetof( TEB
, SystemReserved2
) + offsetof( struct x86_thread_data
, gs
) == 0x1d8 );
552 C_ASSERT( offsetof( TEB
, SystemReserved2
) + offsetof( struct x86_thread_data
, vm86
) ==
553 offsetof( TEB
, GdiTebBatch
) + offsetof( struct ntdll_thread_data
, __vm86
));
556 static inline struct x86_thread_data
*x86_thread_data(void)
558 return (struct x86_thread_data
*)NtCurrentTeb()->SystemReserved2
;
561 /* Exception record for handling exceptions happening inside exception handlers */
564 EXCEPTION_REGISTRATION_RECORD frame
;
565 EXCEPTION_REGISTRATION_RECORD
*prevFrame
;
568 extern DWORD
EXC_CallHandler( EXCEPTION_RECORD
*record
, EXCEPTION_REGISTRATION_RECORD
*frame
,
569 CONTEXT
*context
, EXCEPTION_REGISTRATION_RECORD
**dispatcher
,
570 PEXCEPTION_HANDLER handler
, PEXCEPTION_HANDLER nested_handler
);
572 /***********************************************************************
575 static inline int dispatch_signal(unsigned int sig
)
577 if (handlers
[sig
] == NULL
) return 0;
578 return handlers
[sig
](sig
);
582 /***********************************************************************
585 * Get the trap code for a signal.
587 static inline enum i386_trap_code
get_trap_code( const ucontext_t
*sigcontext
)
590 return TRAP_sig(sigcontext
);
592 return TRAP_x86_UNKNOWN
; /* unknown trap code */
596 /***********************************************************************
599 * Get the error code for a signal.
601 static inline WORD
get_error_code( const ucontext_t
*sigcontext
)
604 return ERROR_sig(sigcontext
);
610 /***********************************************************************
613 * Get the base of the signal stack for the current thread.
615 static inline void *get_signal_stack(void)
617 return (char *)NtCurrentTeb() + 4096;
621 /***********************************************************************
624 * Get the current teb based on the stack pointer.
626 static inline TEB
*get_current_teb(void)
629 __asm__("movl %%esp,%0" : "=g" (esp
) );
630 return (TEB
*)(esp
& ~signal_stack_mask
);
634 /*******************************************************************
637 static inline BOOL
is_valid_frame( void *frame
)
639 if ((ULONG_PTR
)frame
& 3) return FALSE
;
640 return (frame
>= NtCurrentTeb()->Tib
.StackLimit
&&
641 (void **)frame
< (void **)NtCurrentTeb()->Tib
.StackBase
- 1);
644 /*******************************************************************
647 * Handler for exceptions happening inside a handler.
649 static DWORD
raise_handler( EXCEPTION_RECORD
*rec
, EXCEPTION_REGISTRATION_RECORD
*frame
,
650 CONTEXT
*context
, EXCEPTION_REGISTRATION_RECORD
**dispatcher
)
652 if (rec
->ExceptionFlags
& (EH_UNWINDING
| EH_EXIT_UNWIND
))
653 return ExceptionContinueSearch
;
654 /* We shouldn't get here so we store faulty frame in dispatcher */
655 *dispatcher
= ((EXC_NESTED_FRAME
*)frame
)->prevFrame
;
656 return ExceptionNestedException
;
660 /*******************************************************************
663 * Handler for exceptions happening inside an unwind handler.
665 static DWORD
unwind_handler( EXCEPTION_RECORD
*rec
, EXCEPTION_REGISTRATION_RECORD
*frame
,
666 CONTEXT
*context
, EXCEPTION_REGISTRATION_RECORD
**dispatcher
)
668 if (!(rec
->ExceptionFlags
& (EH_UNWINDING
| EH_EXIT_UNWIND
)))
669 return ExceptionContinueSearch
;
670 /* We shouldn't get here so we store faulty frame in dispatcher */
671 *dispatcher
= ((EXC_NESTED_FRAME
*)frame
)->prevFrame
;
672 return ExceptionCollidedUnwind
;
676 /**********************************************************************
677 * call_stack_handlers
679 * Call the stack handlers chain.
681 static NTSTATUS
call_stack_handlers( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
683 EXCEPTION_REGISTRATION_RECORD
*frame
, *dispatch
, *nested_frame
;
686 frame
= NtCurrentTeb()->Tib
.ExceptionList
;
688 while (frame
!= (EXCEPTION_REGISTRATION_RECORD
*)~0UL)
690 /* Check frame address */
691 if (!is_valid_frame( frame
))
693 rec
->ExceptionFlags
|= EH_STACK_INVALID
;
698 TRACE( "calling handler at %p code=%x flags=%x\n",
699 frame
->Handler
, rec
->ExceptionCode
, rec
->ExceptionFlags
);
700 res
= EXC_CallHandler( rec
, frame
, context
, &dispatch
, frame
->Handler
, raise_handler
);
701 TRACE( "handler at %p returned %x\n", frame
->Handler
, res
);
703 if (frame
== nested_frame
)
705 /* no longer nested */
707 rec
->ExceptionFlags
&= ~EH_NESTED_CALL
;
712 case ExceptionContinueExecution
:
713 if (!(rec
->ExceptionFlags
& EH_NONCONTINUABLE
)) return STATUS_SUCCESS
;
714 return STATUS_NONCONTINUABLE_EXCEPTION
;
715 case ExceptionContinueSearch
:
717 case ExceptionNestedException
:
718 if (nested_frame
< dispatch
) nested_frame
= dispatch
;
719 rec
->ExceptionFlags
|= EH_NESTED_CALL
;
722 return STATUS_INVALID_DISPOSITION
;
726 return STATUS_UNHANDLED_EXCEPTION
;
730 /*******************************************************************
733 * Implementation of NtRaiseException.
735 static NTSTATUS
raise_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
, BOOL first_chance
)
743 TRACE( "code=%x flags=%x addr=%p ip=%08x tid=%04x\n",
744 rec
->ExceptionCode
, rec
->ExceptionFlags
, rec
->ExceptionAddress
,
745 context
->Eip
, GetCurrentThreadId() );
746 for (c
= 0; c
< rec
->NumberParameters
; c
++)
747 TRACE( " info[%d]=%08lx\n", c
, rec
->ExceptionInformation
[c
] );
748 if (rec
->ExceptionCode
== EXCEPTION_WINE_STUB
)
750 if (rec
->ExceptionInformation
[1] >> 16)
751 MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
752 rec
->ExceptionAddress
,
753 (char*)rec
->ExceptionInformation
[0], (char*)rec
->ExceptionInformation
[1] );
755 MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
756 rec
->ExceptionAddress
,
757 (char*)rec
->ExceptionInformation
[0], rec
->ExceptionInformation
[1] );
761 TRACE(" eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n",
762 context
->Eax
, context
->Ebx
, context
->Ecx
,
763 context
->Edx
, context
->Esi
, context
->Edi
);
764 TRACE(" ebp=%08x esp=%08x cs=%04x ds=%04x es=%04x fs=%04x gs=%04x flags=%08x\n",
765 context
->Ebp
, context
->Esp
, context
->SegCs
, context
->SegDs
,
766 context
->SegEs
, context
->SegFs
, context
->SegGs
, context
->EFlags
);
768 status
= send_debug_event( rec
, TRUE
, context
);
769 if (status
== DBG_CONTINUE
|| status
== DBG_EXCEPTION_HANDLED
)
770 return STATUS_SUCCESS
;
772 /* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
773 if (rec
->ExceptionCode
== EXCEPTION_BREAKPOINT
) context
->Eip
--;
775 if (call_vectored_handlers( rec
, context
) == EXCEPTION_CONTINUE_EXECUTION
)
776 return STATUS_SUCCESS
;
778 if ((status
= call_stack_handlers( rec
, context
)) != STATUS_UNHANDLED_EXCEPTION
)
782 /* last chance exception */
784 status
= send_debug_event( rec
, FALSE
, context
);
785 if (status
!= DBG_CONTINUE
)
787 if (rec
->ExceptionFlags
& EH_STACK_INVALID
)
788 WINE_ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
789 else if (rec
->ExceptionCode
== STATUS_NONCONTINUABLE_EXCEPTION
)
790 WINE_ERR("Process attempted to continue execution after noncontinuable exception.\n");
792 WINE_ERR("Unhandled exception code %x flags %x addr %p\n",
793 rec
->ExceptionCode
, rec
->ExceptionFlags
, rec
->ExceptionAddress
);
794 NtTerminateProcess( NtCurrentProcess(), rec
->ExceptionCode
);
796 return STATUS_SUCCESS
;
801 /***********************************************************************
804 * Set the register values from a vm86 structure.
806 static void save_vm86_context( CONTEXT
*context
, const struct vm86plus_struct
*vm86
)
808 context
->ContextFlags
= CONTEXT_FULL
;
809 context
->Eax
= vm86
->regs
.eax
;
810 context
->Ebx
= vm86
->regs
.ebx
;
811 context
->Ecx
= vm86
->regs
.ecx
;
812 context
->Edx
= vm86
->regs
.edx
;
813 context
->Esi
= vm86
->regs
.esi
;
814 context
->Edi
= vm86
->regs
.edi
;
815 context
->Esp
= vm86
->regs
.esp
;
816 context
->Ebp
= vm86
->regs
.ebp
;
817 context
->Eip
= vm86
->regs
.eip
;
818 context
->SegCs
= vm86
->regs
.cs
;
819 context
->SegDs
= vm86
->regs
.ds
;
820 context
->SegEs
= vm86
->regs
.es
;
821 context
->SegFs
= vm86
->regs
.fs
;
822 context
->SegGs
= vm86
->regs
.gs
;
823 context
->SegSs
= vm86
->regs
.ss
;
824 context
->EFlags
= vm86
->regs
.eflags
;
828 /***********************************************************************
829 * restore_vm86_context
831 * Build a vm86 structure from the register values.
833 static void restore_vm86_context( const CONTEXT
*context
, struct vm86plus_struct
*vm86
)
835 vm86
->regs
.eax
= context
->Eax
;
836 vm86
->regs
.ebx
= context
->Ebx
;
837 vm86
->regs
.ecx
= context
->Ecx
;
838 vm86
->regs
.edx
= context
->Edx
;
839 vm86
->regs
.esi
= context
->Esi
;
840 vm86
->regs
.edi
= context
->Edi
;
841 vm86
->regs
.esp
= context
->Esp
;
842 vm86
->regs
.ebp
= context
->Ebp
;
843 vm86
->regs
.eip
= context
->Eip
;
844 vm86
->regs
.cs
= context
->SegCs
;
845 vm86
->regs
.ds
= context
->SegDs
;
846 vm86
->regs
.es
= context
->SegEs
;
847 vm86
->regs
.fs
= context
->SegFs
;
848 vm86
->regs
.gs
= context
->SegGs
;
849 vm86
->regs
.ss
= context
->SegSs
;
850 vm86
->regs
.eflags
= context
->EFlags
;
854 /**********************************************************************
855 * merge_vm86_pending_flags
857 * Merges TEB.vm86_ptr and TEB.vm86_pending VIP flags and
858 * raises exception if there are pending events and VIF flag
859 * has been turned on.
861 * Called from __wine_enter_vm86 because vm86_enter
862 * doesn't check for pending events.
864 * Called from raise_vm86_sti_exception to check for
865 * pending events in a signal safe way.
867 static void merge_vm86_pending_flags( EXCEPTION_RECORD
*rec
)
869 BOOL check_pending
= TRUE
;
870 struct vm86plus_struct
*vm86
=
871 (struct vm86plus_struct
*)x86_thread_data()->vm86_ptr
;
874 * In order to prevent a race when SIGUSR2 occurs while
875 * we are returning from exception handler, pending events
876 * will be rechecked after each raised exception.
878 while (check_pending
&& get_vm86_teb_info()->vm86_pending
)
880 check_pending
= FALSE
;
881 x86_thread_data()->vm86_ptr
= NULL
;
884 * If VIF is set, throw exception.
885 * Note that SIGUSR2 may turn VIF flag off so
886 * VIF check must occur only when TEB.vm86_ptr is NULL.
888 if (vm86
->regs
.eflags
& VIF_FLAG
)
891 save_vm86_context( &vcontext
, vm86
);
893 rec
->ExceptionCode
= EXCEPTION_VM86_STI
;
894 rec
->ExceptionFlags
= EXCEPTION_CONTINUABLE
;
895 rec
->ExceptionRecord
= NULL
;
896 rec
->NumberParameters
= 0;
897 rec
->ExceptionAddress
= (LPVOID
)vcontext
.Eip
;
899 vcontext
.EFlags
&= ~VIP_FLAG
;
900 get_vm86_teb_info()->vm86_pending
= 0;
901 raise_exception( rec
, &vcontext
, TRUE
);
903 restore_vm86_context( &vcontext
, vm86
);
904 check_pending
= TRUE
;
907 x86_thread_data()->vm86_ptr
= vm86
;
911 * Merge VIP flags in a signal safe way. This requires
912 * that the following operation compiles into atomic
915 vm86
->regs
.eflags
|= get_vm86_teb_info()->vm86_pending
;
917 #endif /* __HAVE_VM86 */
922 /* We have to workaround two Solaris breakages:
923 * - Solaris doesn't restore %ds and %es before calling the signal handler so exceptions in 16-bit
925 * - Solaris inserts a libc trampoline to call our handler, but the trampoline expects that registers
926 * are setup correctly. So we need to insert our own trampoline below the libc trampoline to set %gs.
929 extern int sigaction_syscall( int sig
, const struct sigaction
*new, struct sigaction
*old
);
930 __ASM_GLOBAL_FUNC( sigaction_syscall
,
931 "movl $0x62,%eax\n\t"
935 /* assume the same libc handler is used for all signals */
936 static void (*libc_sigacthandler
)( int signal
, siginfo_t
*siginfo
, void *context
);
938 static void wine_sigacthandler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
940 struct x86_thread_data
*thread_data
;
942 __asm__
__volatile__("mov %ss,%ax; mov %ax,%ds; mov %ax,%es");
944 thread_data
= (struct x86_thread_data
*)get_current_teb()->SystemReserved2
;
945 wine_set_fs( thread_data
->fs
);
946 wine_set_gs( thread_data
->gs
);
948 libc_sigacthandler( signal
, siginfo
, sigcontext
);
951 static int solaris_sigaction( int sig
, const struct sigaction
*new, struct sigaction
*old
)
953 struct sigaction real_act
;
955 if (sigaction( sig
, new, old
) == -1) return -1;
957 /* retrieve the real handler and flags with a direct syscall */
958 sigaction_syscall( sig
, NULL
, &real_act
);
959 libc_sigacthandler
= real_act
.sa_sigaction
;
960 real_act
.sa_sigaction
= wine_sigacthandler
;
961 sigaction_syscall( sig
, &real_act
, NULL
);
964 #define sigaction(sig,new,old) solaris_sigaction(sig,new,old)
968 typedef void (WINAPI
*raise_func
)( EXCEPTION_RECORD
*rec
, CONTEXT
*context
);
970 extern void clear_alignment_flag(void);
971 __ASM_GLOBAL_FUNC( clear_alignment_flag
,
973 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
974 "andl $~0x40000,(%esp)\n\t"
976 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
980 /***********************************************************************
983 * Handler initialization when the full context is not needed.
984 * Return the stack pointer to use for pushing the exception data.
986 static inline void *init_handler( const ucontext_t
*sigcontext
, WORD
*fs
, WORD
*gs
)
988 TEB
*teb
= get_current_teb();
990 clear_alignment_flag();
992 /* get %fs and %gs at time of the fault */
994 *fs
= LOWORD(FS_sig(sigcontext
));
999 *gs
= LOWORD(GS_sig(sigcontext
));
1001 *gs
= wine_get_gs();
1004 #ifndef __sun /* see above for Solaris handling */
1006 struct x86_thread_data
*thread_data
= (struct x86_thread_data
*)teb
->SystemReserved2
;
1007 wine_set_fs( thread_data
->fs
);
1008 wine_set_gs( thread_data
->gs
);
1012 if (!wine_ldt_is_system(CS_sig(sigcontext
)) ||
1013 !wine_ldt_is_system(SS_sig(sigcontext
))) /* 16-bit mode */
1016 * Win16 or DOS protected mode. Note that during switch
1017 * from 16-bit mode to linear mode, CS may be set to system
1018 * segment before FS is restored. Fortunately, in this case
1019 * SS is still non-system segment. This is why both CS and SS
1022 return teb
->WOW32Reserved
;
1024 return (void *)(ESP_sig(sigcontext
) & ~3);
1028 /***********************************************************************
1031 * Save the thread FPU context.
1033 static inline void save_fpu( CONTEXT
*context
)
1036 context
->ContextFlags
|= CONTEXT_FLOATING_POINT
;
1037 __asm__
__volatile__( "fnsave %0; fwait" : "=m" (context
->FloatSave
) );
1042 /***********************************************************************
1045 * Restore the FPU context to a sigcontext.
1047 static inline void restore_fpu( const CONTEXT
*context
)
1049 FLOATING_SAVE_AREA float_status
= context
->FloatSave
;
1050 /* reset the current interrupt status */
1051 float_status
.StatusWord
&= float_status
.ControlWord
| 0xffffff80;
1053 __asm__
__volatile__( "frstor %0; fwait" : : "m" (float_status
) );
1054 #endif /* __GNUC__ */
1058 /***********************************************************************
1061 * Restore the FPU extended context to a sigcontext.
1063 static inline void restore_fpux( const CONTEXT
*context
)
1066 /* we have to enforce alignment by hand */
1067 char buffer
[sizeof(XMM_SAVE_AREA32
) + 16];
1068 XMM_SAVE_AREA32
*state
= (XMM_SAVE_AREA32
*)(((ULONG_PTR
)buffer
+ 15) & ~15);
1070 memcpy( state
, context
->ExtendedRegisters
, sizeof(*state
) );
1071 /* reset the current interrupt status */
1072 state
->StatusWord
&= state
->ControlWord
| 0xff80;
1073 __asm__
__volatile__( "fxrstor %0" : : "m" (*state
) );
1078 /***********************************************************************
1081 * Build a standard FPU context from an extended one.
1083 static void fpux_to_fpu( FLOATING_SAVE_AREA
*fpu
, const XMM_SAVE_AREA32
*fpux
)
1085 unsigned int i
, tag
, stack_top
;
1087 fpu
->ControlWord
= fpux
->ControlWord
| 0xffff0000;
1088 fpu
->StatusWord
= fpux
->StatusWord
| 0xffff0000;
1089 fpu
->ErrorOffset
= fpux
->ErrorOffset
;
1090 fpu
->ErrorSelector
= fpux
->ErrorSelector
| (fpux
->ErrorOpcode
<< 16);
1091 fpu
->DataOffset
= fpux
->DataOffset
;
1092 fpu
->DataSelector
= fpux
->DataSelector
;
1093 fpu
->Cr0NpxState
= fpux
->StatusWord
| 0xffff0000;
1095 stack_top
= (fpux
->StatusWord
>> 11) & 7;
1096 fpu
->TagWord
= 0xffff0000;
1097 for (i
= 0; i
< 8; i
++)
1099 memcpy( &fpu
->RegisterArea
[10 * i
], &fpux
->FloatRegisters
[i
], 10 );
1100 if (!(fpux
->TagWord
& (1 << i
))) tag
= 3; /* empty */
1103 const M128A
*reg
= &fpux
->FloatRegisters
[(i
- stack_top
) & 7];
1104 if ((reg
->High
& 0x7fff) == 0x7fff) /* exponent all ones */
1106 tag
= 2; /* special */
1108 else if (!(reg
->High
& 0x7fff)) /* exponent all zeroes */
1110 if (reg
->Low
) tag
= 2; /* special */
1111 else tag
= 1; /* zero */
1115 if (reg
->Low
>> 63) tag
= 0; /* valid */
1116 else tag
= 2; /* special */
1119 fpu
->TagWord
|= tag
<< (2 * i
);
1124 /***********************************************************************
1127 * Build a context structure from the signal info.
1129 static inline void save_context( CONTEXT
*context
, const ucontext_t
*sigcontext
, WORD fs
, WORD gs
)
1131 FLOATING_SAVE_AREA
*fpu
= FPU_sig(sigcontext
);
1132 XMM_SAVE_AREA32
*fpux
= FPUX_sig(sigcontext
);
1134 memset(context
, 0, sizeof(*context
));
1135 context
->ContextFlags
= CONTEXT_FULL
| CONTEXT_DEBUG_REGISTERS
;
1136 context
->Eax
= EAX_sig(sigcontext
);
1137 context
->Ebx
= EBX_sig(sigcontext
);
1138 context
->Ecx
= ECX_sig(sigcontext
);
1139 context
->Edx
= EDX_sig(sigcontext
);
1140 context
->Esi
= ESI_sig(sigcontext
);
1141 context
->Edi
= EDI_sig(sigcontext
);
1142 context
->Ebp
= EBP_sig(sigcontext
);
1143 context
->EFlags
= EFL_sig(sigcontext
);
1144 context
->Eip
= EIP_sig(sigcontext
);
1145 context
->Esp
= ESP_sig(sigcontext
);
1146 context
->SegCs
= LOWORD(CS_sig(sigcontext
));
1147 context
->SegDs
= LOWORD(DS_sig(sigcontext
));
1148 context
->SegEs
= LOWORD(ES_sig(sigcontext
));
1149 context
->SegFs
= fs
;
1150 context
->SegGs
= gs
;
1151 context
->SegSs
= LOWORD(SS_sig(sigcontext
));
1152 context
->Dr0
= x86_thread_data()->dr0
;
1153 context
->Dr1
= x86_thread_data()->dr1
;
1154 context
->Dr2
= x86_thread_data()->dr2
;
1155 context
->Dr3
= x86_thread_data()->dr3
;
1156 context
->Dr6
= x86_thread_data()->dr6
;
1157 context
->Dr7
= x86_thread_data()->dr7
;
1161 context
->ContextFlags
|= CONTEXT_FLOATING_POINT
;
1162 context
->FloatSave
= *fpu
;
1166 context
->ContextFlags
|= CONTEXT_FLOATING_POINT
| CONTEXT_EXTENDED_REGISTERS
;
1167 memcpy( context
->ExtendedRegisters
, fpux
, sizeof(*fpux
) );
1168 fpux_support
= TRUE
;
1169 if (!fpu
) fpux_to_fpu( &context
->FloatSave
, fpux
);
1171 if (!fpu
&& !fpux
) save_fpu( context
);
1175 /***********************************************************************
1178 * Restore the signal info from the context.
1180 static inline void restore_context( const CONTEXT
*context
, ucontext_t
*sigcontext
)
1182 FLOATING_SAVE_AREA
*fpu
= FPU_sig(sigcontext
);
1183 XMM_SAVE_AREA32
*fpux
= FPUX_sig(sigcontext
);
1185 x86_thread_data()->dr0
= context
->Dr0
;
1186 x86_thread_data()->dr1
= context
->Dr1
;
1187 x86_thread_data()->dr2
= context
->Dr2
;
1188 x86_thread_data()->dr3
= context
->Dr3
;
1189 x86_thread_data()->dr6
= context
->Dr6
;
1190 x86_thread_data()->dr7
= context
->Dr7
;
1191 EAX_sig(sigcontext
) = context
->Eax
;
1192 EBX_sig(sigcontext
) = context
->Ebx
;
1193 ECX_sig(sigcontext
) = context
->Ecx
;
1194 EDX_sig(sigcontext
) = context
->Edx
;
1195 ESI_sig(sigcontext
) = context
->Esi
;
1196 EDI_sig(sigcontext
) = context
->Edi
;
1197 EBP_sig(sigcontext
) = context
->Ebp
;
1198 EFL_sig(sigcontext
) = context
->EFlags
;
1199 EIP_sig(sigcontext
) = context
->Eip
;
1200 ESP_sig(sigcontext
) = context
->Esp
;
1201 CS_sig(sigcontext
) = context
->SegCs
;
1202 DS_sig(sigcontext
) = context
->SegDs
;
1203 ES_sig(sigcontext
) = context
->SegEs
;
1204 SS_sig(sigcontext
) = context
->SegSs
;
1206 GS_sig(sigcontext
) = context
->SegGs
;
1208 wine_set_gs( context
->SegGs
);
1211 FS_sig(sigcontext
) = context
->SegFs
;
1213 wine_set_fs( context
->SegFs
);
1216 if (fpu
) *fpu
= context
->FloatSave
;
1217 if (fpux
) memcpy( fpux
, context
->ExtendedRegisters
, sizeof(*fpux
) );
1218 if (!fpu
&& !fpux
) restore_fpu( context
);
1222 /***********************************************************************
1223 * RtlCaptureContext (NTDLL.@)
1225 __ASM_STDCALL_FUNC( RtlCaptureContext
, 4,
1227 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
1228 "movl 8(%esp),%eax\n\t" /* context */
1229 "movl $0x10007,(%eax)\n\t" /* context->ContextFlags */
1230 "movw %gs,0x8c(%eax)\n\t" /* context->SegGs */
1231 "movw %fs,0x90(%eax)\n\t" /* context->SegFs */
1232 "movw %es,0x94(%eax)\n\t" /* context->SegEs */
1233 "movw %ds,0x98(%eax)\n\t" /* context->SegDs */
1234 "movl %edi,0x9c(%eax)\n\t" /* context->Edi */
1235 "movl %esi,0xa0(%eax)\n\t" /* context->Esi */
1236 "movl %ebx,0xa4(%eax)\n\t" /* context->Ebx */
1237 "movl %edx,0xa8(%eax)\n\t" /* context->Edx */
1238 "movl %ecx,0xac(%eax)\n\t" /* context->Ecx */
1239 "movl 0(%ebp),%edx\n\t"
1240 "movl %edx,0xb4(%eax)\n\t" /* context->Ebp */
1241 "movl 4(%ebp),%edx\n\t"
1242 "movl %edx,0xb8(%eax)\n\t" /* context->Eip */
1243 "movw %cs,0xbc(%eax)\n\t" /* context->SegCs */
1245 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
1246 "popl 0xc0(%eax)\n\t" /* context->EFlags */
1247 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
1248 "leal 8(%ebp),%edx\n\t"
1249 "movl %edx,0xc4(%eax)\n\t" /* context->Esp */
1250 "movw %ss,0xc8(%eax)\n\t" /* context->SegSs */
1251 "popl 0xb0(%eax)\n\t" /* context->Eax */
1252 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
1256 /***********************************************************************
1259 * Set the new CPU context. Used by NtSetContextThread.
1261 static void set_cpu_context( const CONTEXT
*context
)
1263 DWORD flags
= context
->ContextFlags
& ~CONTEXT_i386
;
1265 if ((flags
& CONTEXT_EXTENDED_REGISTERS
) && fpux_support
) restore_fpux( context
);
1266 else if (flags
& CONTEXT_FLOATING_POINT
) restore_fpu( context
);
1268 if (flags
& CONTEXT_DEBUG_REGISTERS
)
1270 x86_thread_data()->dr0
= context
->Dr0
;
1271 x86_thread_data()->dr1
= context
->Dr1
;
1272 x86_thread_data()->dr2
= context
->Dr2
;
1273 x86_thread_data()->dr3
= context
->Dr3
;
1274 x86_thread_data()->dr6
= context
->Dr6
;
1275 x86_thread_data()->dr7
= context
->Dr7
;
1277 if (flags
& CONTEXT_FULL
)
1279 if (!(flags
& CONTEXT_CONTROL
))
1280 FIXME( "setting partial context (%x) not supported\n", flags
);
1281 else if (flags
& CONTEXT_SEGMENTS
)
1282 __wine_restore_regs( context
);
1285 CONTEXT newcontext
= *context
;
1286 newcontext
.SegDs
= wine_get_ds();
1287 newcontext
.SegEs
= wine_get_es();
1288 newcontext
.SegFs
= wine_get_fs();
1289 newcontext
.SegGs
= wine_get_gs();
1290 __wine_restore_regs( &newcontext
);
1296 /***********************************************************************
1299 * Convert a register context to the server format.
1301 NTSTATUS
context_to_server( context_t
*to
, const CONTEXT
*from
)
1303 DWORD flags
= from
->ContextFlags
& ~CONTEXT_i386
; /* get rid of CPU id */
1305 memset( to
, 0, sizeof(*to
) );
1308 if (flags
& CONTEXT_CONTROL
)
1310 to
->flags
|= SERVER_CTX_CONTROL
;
1311 to
->ctl
.i386_regs
.ebp
= from
->Ebp
;
1312 to
->ctl
.i386_regs
.esp
= from
->Esp
;
1313 to
->ctl
.i386_regs
.eip
= from
->Eip
;
1314 to
->ctl
.i386_regs
.cs
= from
->SegCs
;
1315 to
->ctl
.i386_regs
.ss
= from
->SegSs
;
1316 to
->ctl
.i386_regs
.eflags
= from
->EFlags
;
1318 if (flags
& CONTEXT_INTEGER
)
1320 to
->flags
|= SERVER_CTX_INTEGER
;
1321 to
->integer
.i386_regs
.eax
= from
->Eax
;
1322 to
->integer
.i386_regs
.ebx
= from
->Ebx
;
1323 to
->integer
.i386_regs
.ecx
= from
->Ecx
;
1324 to
->integer
.i386_regs
.edx
= from
->Edx
;
1325 to
->integer
.i386_regs
.esi
= from
->Esi
;
1326 to
->integer
.i386_regs
.edi
= from
->Edi
;
1328 if (flags
& CONTEXT_SEGMENTS
)
1330 to
->flags
|= SERVER_CTX_SEGMENTS
;
1331 to
->seg
.i386_regs
.ds
= from
->SegDs
;
1332 to
->seg
.i386_regs
.es
= from
->SegEs
;
1333 to
->seg
.i386_regs
.fs
= from
->SegFs
;
1334 to
->seg
.i386_regs
.gs
= from
->SegGs
;
1336 if (flags
& CONTEXT_FLOATING_POINT
)
1338 to
->flags
|= SERVER_CTX_FLOATING_POINT
;
1339 to
->fp
.i386_regs
.ctrl
= from
->FloatSave
.ControlWord
;
1340 to
->fp
.i386_regs
.status
= from
->FloatSave
.StatusWord
;
1341 to
->fp
.i386_regs
.tag
= from
->FloatSave
.TagWord
;
1342 to
->fp
.i386_regs
.err_off
= from
->FloatSave
.ErrorOffset
;
1343 to
->fp
.i386_regs
.err_sel
= from
->FloatSave
.ErrorSelector
;
1344 to
->fp
.i386_regs
.data_off
= from
->FloatSave
.DataOffset
;
1345 to
->fp
.i386_regs
.data_sel
= from
->FloatSave
.DataSelector
;
1346 to
->fp
.i386_regs
.cr0npx
= from
->FloatSave
.Cr0NpxState
;
1347 memcpy( to
->fp
.i386_regs
.regs
, from
->FloatSave
.RegisterArea
, sizeof(to
->fp
.i386_regs
.regs
) );
1349 if (flags
& CONTEXT_DEBUG_REGISTERS
)
1351 to
->flags
|= SERVER_CTX_DEBUG_REGISTERS
;
1352 to
->debug
.i386_regs
.dr0
= from
->Dr0
;
1353 to
->debug
.i386_regs
.dr1
= from
->Dr1
;
1354 to
->debug
.i386_regs
.dr2
= from
->Dr2
;
1355 to
->debug
.i386_regs
.dr3
= from
->Dr3
;
1356 to
->debug
.i386_regs
.dr6
= from
->Dr6
;
1357 to
->debug
.i386_regs
.dr7
= from
->Dr7
;
1359 if (flags
& CONTEXT_EXTENDED_REGISTERS
)
1361 to
->flags
|= SERVER_CTX_EXTENDED_REGISTERS
;
1362 memcpy( to
->ext
.i386_regs
, from
->ExtendedRegisters
, sizeof(to
->ext
.i386_regs
) );
1364 return STATUS_SUCCESS
;
1368 /***********************************************************************
1369 * context_from_server
1371 * Convert a register context from the server format.
1373 NTSTATUS
context_from_server( CONTEXT
*to
, const context_t
*from
)
1375 if (from
->cpu
!= CPU_x86
) return STATUS_INVALID_PARAMETER
;
1377 to
->ContextFlags
= CONTEXT_i386
;
1378 if (from
->flags
& SERVER_CTX_CONTROL
)
1380 to
->ContextFlags
|= CONTEXT_CONTROL
;
1381 to
->Ebp
= from
->ctl
.i386_regs
.ebp
;
1382 to
->Esp
= from
->ctl
.i386_regs
.esp
;
1383 to
->Eip
= from
->ctl
.i386_regs
.eip
;
1384 to
->SegCs
= from
->ctl
.i386_regs
.cs
;
1385 to
->SegSs
= from
->ctl
.i386_regs
.ss
;
1386 to
->EFlags
= from
->ctl
.i386_regs
.eflags
;
1388 if (from
->flags
& SERVER_CTX_INTEGER
)
1390 to
->ContextFlags
|= CONTEXT_INTEGER
;
1391 to
->Eax
= from
->integer
.i386_regs
.eax
;
1392 to
->Ebx
= from
->integer
.i386_regs
.ebx
;
1393 to
->Ecx
= from
->integer
.i386_regs
.ecx
;
1394 to
->Edx
= from
->integer
.i386_regs
.edx
;
1395 to
->Esi
= from
->integer
.i386_regs
.esi
;
1396 to
->Edi
= from
->integer
.i386_regs
.edi
;
1398 if (from
->flags
& SERVER_CTX_SEGMENTS
)
1400 to
->ContextFlags
|= CONTEXT_SEGMENTS
;
1401 to
->SegDs
= from
->seg
.i386_regs
.ds
;
1402 to
->SegEs
= from
->seg
.i386_regs
.es
;
1403 to
->SegFs
= from
->seg
.i386_regs
.fs
;
1404 to
->SegGs
= from
->seg
.i386_regs
.gs
;
1406 if (from
->flags
& SERVER_CTX_FLOATING_POINT
)
1408 to
->ContextFlags
|= CONTEXT_FLOATING_POINT
;
1409 to
->FloatSave
.ControlWord
= from
->fp
.i386_regs
.ctrl
;
1410 to
->FloatSave
.StatusWord
= from
->fp
.i386_regs
.status
;
1411 to
->FloatSave
.TagWord
= from
->fp
.i386_regs
.tag
;
1412 to
->FloatSave
.ErrorOffset
= from
->fp
.i386_regs
.err_off
;
1413 to
->FloatSave
.ErrorSelector
= from
->fp
.i386_regs
.err_sel
;
1414 to
->FloatSave
.DataOffset
= from
->fp
.i386_regs
.data_off
;
1415 to
->FloatSave
.DataSelector
= from
->fp
.i386_regs
.data_sel
;
1416 to
->FloatSave
.Cr0NpxState
= from
->fp
.i386_regs
.cr0npx
;
1417 memcpy( to
->FloatSave
.RegisterArea
, from
->fp
.i386_regs
.regs
, sizeof(to
->FloatSave
.RegisterArea
) );
1419 if (from
->flags
& SERVER_CTX_DEBUG_REGISTERS
)
1421 to
->ContextFlags
|= CONTEXT_DEBUG_REGISTERS
;
1422 to
->Dr0
= from
->debug
.i386_regs
.dr0
;
1423 to
->Dr1
= from
->debug
.i386_regs
.dr1
;
1424 to
->Dr2
= from
->debug
.i386_regs
.dr2
;
1425 to
->Dr3
= from
->debug
.i386_regs
.dr3
;
1426 to
->Dr6
= from
->debug
.i386_regs
.dr6
;
1427 to
->Dr7
= from
->debug
.i386_regs
.dr7
;
1429 if (from
->flags
& SERVER_CTX_EXTENDED_REGISTERS
)
1431 to
->ContextFlags
|= CONTEXT_EXTENDED_REGISTERS
;
1432 memcpy( to
->ExtendedRegisters
, from
->ext
.i386_regs
, sizeof(to
->ExtendedRegisters
) );
1434 return STATUS_SUCCESS
;
1438 /***********************************************************************
1439 * NtSetContextThread (NTDLL.@)
1440 * ZwSetContextThread (NTDLL.@)
1442 NTSTATUS WINAPI
NtSetContextThread( HANDLE handle
, const CONTEXT
*context
)
1444 NTSTATUS ret
= STATUS_SUCCESS
;
1445 BOOL self
= (handle
== GetCurrentThread());
1447 /* debug registers require a server call */
1448 if (self
&& (context
->ContextFlags
& (CONTEXT_DEBUG_REGISTERS
& ~CONTEXT_i386
)))
1449 self
= (x86_thread_data()->dr0
== context
->Dr0
&&
1450 x86_thread_data()->dr1
== context
->Dr1
&&
1451 x86_thread_data()->dr2
== context
->Dr2
&&
1452 x86_thread_data()->dr3
== context
->Dr3
&&
1453 x86_thread_data()->dr6
== context
->Dr6
&&
1454 x86_thread_data()->dr7
== context
->Dr7
);
1456 if (!self
) ret
= set_thread_context( handle
, context
, &self
);
1458 if (self
&& ret
== STATUS_SUCCESS
) set_cpu_context( context
);
1463 /***********************************************************************
1464 * NtGetContextThread (NTDLL.@)
1465 * ZwGetContextThread (NTDLL.@)
1467 * Note: we use a small assembly wrapper to save the necessary registers
1468 * in case we are fetching the context of the current thread.
1470 NTSTATUS CDECL DECLSPEC_HIDDEN
__regs_NtGetContextThread( DWORD edi
, DWORD esi
, DWORD ebx
, DWORD eflags
,
1471 DWORD ebp
, DWORD retaddr
, HANDLE handle
,
1475 DWORD needed_flags
= context
->ContextFlags
& ~CONTEXT_i386
;
1476 BOOL self
= (handle
== GetCurrentThread());
1478 /* debug registers require a server call */
1479 if (needed_flags
& CONTEXT_DEBUG_REGISTERS
) self
= FALSE
;
1483 if ((ret
= get_thread_context( handle
, context
, &self
))) return ret
;
1484 needed_flags
&= ~context
->ContextFlags
;
1489 if (needed_flags
& CONTEXT_INTEGER
)
1497 context
->ContextFlags
|= CONTEXT_INTEGER
;
1499 if (needed_flags
& CONTEXT_CONTROL
)
1502 context
->Esp
= (DWORD
)&retaddr
;
1503 context
->Eip
= *(&edi
- 1);
1504 context
->SegCs
= wine_get_cs();
1505 context
->SegSs
= wine_get_ss();
1506 context
->EFlags
= eflags
;
1507 context
->ContextFlags
|= CONTEXT_CONTROL
;
1509 if (needed_flags
& CONTEXT_SEGMENTS
)
1511 context
->SegDs
= wine_get_ds();
1512 context
->SegEs
= wine_get_es();
1513 context
->SegFs
= wine_get_fs();
1514 context
->SegGs
= wine_get_gs();
1515 context
->ContextFlags
|= CONTEXT_SEGMENTS
;
1517 if (needed_flags
& CONTEXT_FLOATING_POINT
) save_fpu( context
);
1518 /* FIXME: extended floating point */
1519 /* update the cached version of the debug registers */
1520 if (context
->ContextFlags
& (CONTEXT_DEBUG_REGISTERS
& ~CONTEXT_i386
))
1522 x86_thread_data()->dr0
= context
->Dr0
;
1523 x86_thread_data()->dr1
= context
->Dr1
;
1524 x86_thread_data()->dr2
= context
->Dr2
;
1525 x86_thread_data()->dr3
= context
->Dr3
;
1526 x86_thread_data()->dr6
= context
->Dr6
;
1527 x86_thread_data()->dr7
= context
->Dr7
;
1531 if (context
->ContextFlags
& (CONTEXT_INTEGER
& ~CONTEXT_i386
))
1532 TRACE( "%p: eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n", handle
,
1533 context
->Eax
, context
->Ebx
, context
->Ecx
, context
->Edx
, context
->Esi
, context
->Edi
);
1534 if (context
->ContextFlags
& (CONTEXT_CONTROL
& ~CONTEXT_i386
))
1535 TRACE( "%p: ebp=%08x esp=%08x eip=%08x cs=%04x ss=%04x flags=%08x\n", handle
,
1536 context
->Ebp
, context
->Esp
, context
->Eip
, context
->SegCs
, context
->SegSs
, context
->EFlags
);
1537 if (context
->ContextFlags
& (CONTEXT_SEGMENTS
& ~CONTEXT_i386
))
1538 TRACE( "%p: ds=%04x es=%04x fs=%04x gs=%04x\n", handle
,
1539 context
->SegCs
, context
->SegDs
, context
->SegEs
, context
->SegFs
);
1540 if (context
->ContextFlags
& (CONTEXT_DEBUG_REGISTERS
& ~CONTEXT_i386
))
1541 TRACE( "%p: dr0=%08x dr1=%08x dr2=%08x dr3=%08x dr6=%08x dr7=%08x\n", handle
,
1542 context
->Dr0
, context
->Dr1
, context
->Dr2
, context
->Dr3
, context
->Dr6
, context
->Dr7
);
1544 return STATUS_SUCCESS
;
1546 __ASM_STDCALL_FUNC( NtGetContextThread
, 8,
1548 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
1549 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
1550 "movl %esp,%ebp\n\t"
1551 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
1554 __ASM_CFI(".cfi_rel_offset %ebx,-8\n\t")
1556 __ASM_CFI(".cfi_rel_offset %esi,-12\n\t")
1558 __ASM_CFI(".cfi_rel_offset %edi,-16\n\t")
1559 "call " __ASM_NAME("__regs_NtGetContextThread") "\n\t"
1561 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
1562 __ASM_CFI(".cfi_same_value %ebp\n\t")
1566 /***********************************************************************
1567 * is_privileged_instr
1569 * Check if the fault location is a privileged instruction.
1570 * Based on the instruction emulation code in dlls/kernel/instr.c.
1572 static inline DWORD
is_privileged_instr( CONTEXT
*context
)
1575 unsigned int prefix_count
= 0;
1577 if (!wine_ldt_is_system( context
->SegCs
)) return 0;
1578 instr
= (BYTE
*)context
->Eip
;
1580 for (;;) switch(*instr
)
1582 /* instruction prefixes */
1583 case 0x2e: /* %cs: */
1584 case 0x36: /* %ss: */
1585 case 0x3e: /* %ds: */
1586 case 0x26: /* %es: */
1587 case 0x64: /* %fs: */
1588 case 0x65: /* %gs: */
1589 case 0x66: /* opcode size */
1590 case 0x67: /* addr size */
1591 case 0xf0: /* lock */
1592 case 0xf2: /* repne */
1593 case 0xf3: /* repe */
1594 if (++prefix_count
>= 15) return EXCEPTION_ILLEGAL_INSTRUCTION
;
1598 case 0x0f: /* extended instruction */
1601 case 0x20: /* mov crX, reg */
1602 case 0x21: /* mov drX, reg */
1603 case 0x22: /* mov reg, crX */
1604 case 0x23: /* mov reg drX */
1605 return EXCEPTION_PRIV_INSTRUCTION
;
1608 case 0x6c: /* insb (%dx) */
1609 case 0x6d: /* insl (%dx) */
1610 case 0x6e: /* outsb (%dx) */
1611 case 0x6f: /* outsl (%dx) */
1612 case 0xcd: /* int $xx */
1613 case 0xe4: /* inb al,XX */
1614 case 0xe5: /* in (e)ax,XX */
1615 case 0xe6: /* outb XX,al */
1616 case 0xe7: /* out XX,(e)ax */
1617 case 0xec: /* inb (%dx),%al */
1618 case 0xed: /* inl (%dx),%eax */
1619 case 0xee: /* outb %al,(%dx) */
1620 case 0xef: /* outl %eax,(%dx) */
1621 case 0xf4: /* hlt */
1622 case 0xfa: /* cli */
1623 case 0xfb: /* sti */
1624 return EXCEPTION_PRIV_INSTRUCTION
;
1631 /***********************************************************************
1634 * Handle an interrupt.
1636 static inline BOOL
handle_interrupt( unsigned int interrupt
, EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1642 rec
->ExceptionCode
= EXCEPTION_BREAKPOINT
;
1643 rec
->ExceptionAddress
= (void *)context
->Eip
;
1644 rec
->NumberParameters
= is_wow64
? 1 : 3;
1645 rec
->ExceptionInformation
[0] = context
->Eax
;
1646 rec
->ExceptionInformation
[1] = context
->Ecx
;
1647 rec
->ExceptionInformation
[2] = context
->Edx
;
1655 /***********************************************************************
1658 * Check for fault caused by invalid %gs value (some copy protection schemes mess with it).
1660 static inline BOOL
check_invalid_gs( CONTEXT
*context
)
1662 unsigned int prefix_count
= 0;
1663 const BYTE
*instr
= (BYTE
*)context
->Eip
;
1664 WORD system_gs
= x86_thread_data()->gs
;
1666 if (context
->SegGs
== system_gs
) return FALSE
;
1667 if (!wine_ldt_is_system( context
->SegCs
)) return FALSE
;
1668 /* only handle faults in system libraries */
1669 if (virtual_is_valid_code_address( instr
, 1 )) return FALSE
;
1671 for (;;) switch(*instr
)
1673 /* instruction prefixes */
1674 case 0x2e: /* %cs: */
1675 case 0x36: /* %ss: */
1676 case 0x3e: /* %ds: */
1677 case 0x26: /* %es: */
1678 case 0x64: /* %fs: */
1679 case 0x66: /* opcode size */
1680 case 0x67: /* addr size */
1681 case 0xf0: /* lock */
1682 case 0xf2: /* repne */
1683 case 0xf3: /* repe */
1684 if (++prefix_count
>= 15) return FALSE
;
1687 case 0x65: /* %gs: */
1688 TRACE( "%04x/%04x at %p, fixing up\n", context
->SegGs
, system_gs
, instr
);
1689 context
->SegGs
= system_gs
;
1697 #include "pshpack1.h"
1702 DWORD movl
; /* movl this,4(%esp) */
1704 BYTE jmp
; /* jmp func */
1709 BYTE movl
; /* movl this,ecx */
1711 BYTE jmp
; /* jmp func */
1716 BYTE movl1
; /* movl this,edx */
1718 BYTE movl2
; /* movl func,ecx */
1720 WORD jmp
; /* jmp ecx */
1724 BYTE movl1
; /* movl this,ecx */
1726 BYTE movl2
; /* movl func,eax */
1728 WORD jmp
; /* jmp eax */
1732 DWORD inst1
; /* pop ecx
1739 #include "poppack.h"
1741 /**********************************************************************
1744 * Check if code destination is an ATL thunk, and emulate it if so.
1746 static BOOL
check_atl_thunk( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1748 const union atl_thunk
*thunk
= (const union atl_thunk
*)rec
->ExceptionInformation
[1];
1749 union atl_thunk thunk_copy
;
1752 thunk_len
= virtual_uninterrupted_read_memory( thunk
, &thunk_copy
, sizeof(*thunk
) );
1753 if (!thunk_len
) return FALSE
;
1755 if (thunk_len
>= sizeof(thunk_copy
.t1
) && thunk_copy
.t1
.movl
== 0x042444c7 &&
1756 thunk_copy
.t1
.jmp
== 0xe9)
1758 if (virtual_uninterrupted_write_memory( (DWORD
*)context
->Esp
+ 1,
1759 &thunk_copy
.t1
.this, sizeof(DWORD
) ) == sizeof(DWORD
))
1761 context
->Eip
= (DWORD_PTR
)(&thunk
->t1
.func
+ 1) + thunk_copy
.t1
.func
;
1762 TRACE( "emulating ATL thunk type 1 at %p, func=%08x arg=%08x\n",
1763 thunk
, context
->Eip
, thunk_copy
.t1
.this );
1767 else if (thunk_len
>= sizeof(thunk_copy
.t2
) && thunk_copy
.t2
.movl
== 0xb9 &&
1768 thunk_copy
.t2
.jmp
== 0xe9)
1770 context
->Ecx
= thunk_copy
.t2
.this;
1771 context
->Eip
= (DWORD_PTR
)(&thunk
->t2
.func
+ 1) + thunk_copy
.t2
.func
;
1772 TRACE( "emulating ATL thunk type 2 at %p, func=%08x ecx=%08x\n",
1773 thunk
, context
->Eip
, context
->Ecx
);
1776 else if (thunk_len
>= sizeof(thunk_copy
.t3
) && thunk_copy
.t3
.movl1
== 0xba &&
1777 thunk_copy
.t3
.movl2
== 0xb9 &&
1778 thunk_copy
.t3
.jmp
== 0xe1ff)
1780 context
->Edx
= thunk_copy
.t3
.this;
1781 context
->Ecx
= thunk_copy
.t3
.func
;
1782 context
->Eip
= thunk_copy
.t3
.func
;
1783 TRACE( "emulating ATL thunk type 3 at %p, func=%08x ecx=%08x edx=%08x\n",
1784 thunk
, context
->Eip
, context
->Ecx
, context
->Edx
);
1787 else if (thunk_len
>= sizeof(thunk_copy
.t4
) && thunk_copy
.t4
.movl1
== 0xb9 &&
1788 thunk_copy
.t4
.movl2
== 0xb8 &&
1789 thunk_copy
.t4
.jmp
== 0xe0ff)
1791 context
->Ecx
= thunk_copy
.t4
.this;
1792 context
->Eax
= thunk_copy
.t4
.func
;
1793 context
->Eip
= thunk_copy
.t4
.func
;
1794 TRACE( "emulating ATL thunk type 4 at %p, func=%08x eax=%08x ecx=%08x\n",
1795 thunk
, context
->Eip
, context
->Eax
, context
->Ecx
);
1798 else if (thunk_len
>= sizeof(thunk_copy
.t5
) && thunk_copy
.t5
.inst1
== 0xff515859 &&
1799 thunk_copy
.t5
.inst2
== 0x0460)
1801 DWORD func
, stack
[2];
1802 if (virtual_uninterrupted_read_memory( (DWORD
*)context
->Esp
,
1803 stack
, sizeof(stack
) ) == sizeof(stack
) &&
1804 virtual_uninterrupted_read_memory( (DWORD
*)stack
[1] + 1,
1805 &func
, sizeof(DWORD
) ) == sizeof(DWORD
) &&
1806 virtual_uninterrupted_write_memory( (DWORD
*)context
->Esp
+ 1,
1807 &stack
[0], sizeof(stack
[0]) ) == sizeof(stack
[0]))
1809 context
->Ecx
= stack
[0];
1810 context
->Eax
= stack
[1];
1811 context
->Esp
= context
->Esp
+ sizeof(DWORD
);
1812 context
->Eip
= func
;
1813 TRACE( "emulating ATL thunk type 5 at %p, func=%08x eax=%08x ecx=%08x esp=%08x\n",
1814 thunk
, context
->Eip
, context
->Eax
, context
->Ecx
, context
->Esp
);
1823 /***********************************************************************
1824 * setup_exception_record
1826 * Setup the exception record and context on the thread stack.
1828 static EXCEPTION_RECORD
*setup_exception_record( ucontext_t
*sigcontext
, void *stack_ptr
,
1829 WORD fs
, WORD gs
, raise_func func
)
1833 void *ret_addr
; /* return address from raise_func */
1834 EXCEPTION_RECORD
*rec_ptr
; /* first arg for raise_func */
1835 CONTEXT
*context_ptr
; /* second arg for raise_func */
1837 EXCEPTION_RECORD rec
;
1840 } *stack
= stack_ptr
;
1841 DWORD exception_code
= 0;
1843 /* stack sanity checks */
1845 if ((char *)stack
>= (char *)get_signal_stack() &&
1846 (char *)stack
< (char *)get_signal_stack() + signal_stack_size
)
1848 WINE_ERR( "nested exception on signal stack in thread %04x eip %08x esp %08x stack %p-%p\n",
1849 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1850 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->Tib
.StackLimit
,
1851 NtCurrentTeb()->Tib
.StackBase
);
1855 if (stack
- 1 > stack
|| /* check for overflow in subtraction */
1856 (char *)stack
<= (char *)NtCurrentTeb()->DeallocationStack
||
1857 (char *)stack
> (char *)NtCurrentTeb()->Tib
.StackBase
)
1859 WARN( "exception outside of stack limits in thread %04x eip %08x esp %08x stack %p-%p\n",
1860 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1861 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->Tib
.StackLimit
,
1862 NtCurrentTeb()->Tib
.StackBase
);
1864 else if ((char *)(stack
- 1) < (char *)NtCurrentTeb()->DeallocationStack
+ 4096)
1866 /* stack overflow on last page, unrecoverable */
1867 UINT diff
= (char *)NtCurrentTeb()->DeallocationStack
+ 4096 - (char *)(stack
- 1);
1868 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1869 diff
, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1870 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->DeallocationStack
,
1871 NtCurrentTeb()->Tib
.StackLimit
, NtCurrentTeb()->Tib
.StackBase
);
1874 else if ((char *)(stack
- 1) < (char *)NtCurrentTeb()->Tib
.StackLimit
)
1876 /* stack access below stack limit, may be recoverable */
1877 if (virtual_handle_stack_fault( stack
- 1 )) exception_code
= EXCEPTION_STACK_OVERFLOW
;
1880 UINT diff
= (char *)NtCurrentTeb()->Tib
.StackLimit
- (char *)(stack
- 1);
1881 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1882 diff
, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext
),
1883 (unsigned int) ESP_sig(sigcontext
), NtCurrentTeb()->DeallocationStack
,
1884 NtCurrentTeb()->Tib
.StackLimit
, NtCurrentTeb()->Tib
.StackBase
);
1889 stack
--; /* push the stack_layout structure */
1890 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
1891 VALGRIND_MAKE_MEM_UNDEFINED(stack
, sizeof(*stack
));
1892 #elif defined(VALGRIND_MAKE_WRITABLE)
1893 VALGRIND_MAKE_WRITABLE(stack
, sizeof(*stack
));
1895 stack
->ret_addr
= (void *)0xdeadbabe; /* raise_func must not return */
1896 stack
->rec_ptr
= &stack
->rec
;
1897 stack
->context_ptr
= &stack
->context
;
1899 stack
->rec
.ExceptionRecord
= NULL
;
1900 stack
->rec
.ExceptionCode
= exception_code
;
1901 stack
->rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
1902 stack
->rec
.ExceptionAddress
= (LPVOID
)EIP_sig(sigcontext
);
1903 stack
->rec
.NumberParameters
= 0;
1905 save_context( &stack
->context
, sigcontext
, fs
, gs
);
1907 /* now modify the sigcontext to return to the raise function */
1908 ESP_sig(sigcontext
) = (DWORD
)stack
;
1909 EIP_sig(sigcontext
) = (DWORD
)func
;
1910 /* clear single-step, direction, and align check flag */
1911 EFL_sig(sigcontext
) &= ~(0x100|0x400|0x40000);
1912 CS_sig(sigcontext
) = wine_get_cs();
1913 DS_sig(sigcontext
) = wine_get_ds();
1914 ES_sig(sigcontext
) = wine_get_es();
1915 FS_sig(sigcontext
) = wine_get_fs();
1916 GS_sig(sigcontext
) = wine_get_gs();
1917 SS_sig(sigcontext
) = wine_get_ss();
1919 return stack
->rec_ptr
;
1923 /***********************************************************************
1926 * Setup a proper stack frame for the raise function, and modify the
1927 * sigcontext so that the return from the signal handler will call
1928 * the raise function.
1930 static EXCEPTION_RECORD
*setup_exception( ucontext_t
*sigcontext
, raise_func func
)
1933 void *stack
= init_handler( sigcontext
, &fs
, &gs
);
1935 return setup_exception_record( sigcontext
, stack
, fs
, gs
, func
);
1939 /***********************************************************************
1940 * get_exception_context
1942 * Get a pointer to the context built by setup_exception.
1944 static inline CONTEXT
*get_exception_context( EXCEPTION_RECORD
*rec
)
1946 return (CONTEXT
*)rec
- 1; /* cf. stack_layout structure */
1950 /**********************************************************************
1953 * Get the FPU exception code from the FPU status.
1955 static inline DWORD
get_fpu_code( const CONTEXT
*context
)
1957 DWORD status
= context
->FloatSave
.StatusWord
& ~(context
->FloatSave
.ControlWord
& 0x3f);
1959 if (status
& 0x01) /* IE */
1961 if (status
& 0x40) /* SF */
1962 return EXCEPTION_FLT_STACK_CHECK
;
1964 return EXCEPTION_FLT_INVALID_OPERATION
;
1966 if (status
& 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND
; /* DE flag */
1967 if (status
& 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO
; /* ZE flag */
1968 if (status
& 0x08) return EXCEPTION_FLT_OVERFLOW
; /* OE flag */
1969 if (status
& 0x10) return EXCEPTION_FLT_UNDERFLOW
; /* UE flag */
1970 if (status
& 0x20) return EXCEPTION_FLT_INEXACT_RESULT
; /* PE flag */
1971 return EXCEPTION_FLT_INVALID_OPERATION
; /* generic error */
1975 /**********************************************************************
1976 * raise_segv_exception
1978 static void WINAPI
raise_segv_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
1982 switch(rec
->ExceptionCode
)
1984 case EXCEPTION_ACCESS_VIOLATION
:
1985 if (rec
->NumberParameters
== 2)
1987 if (rec
->ExceptionInformation
[1] == 0xffffffff && check_invalid_gs( context
))
1989 if (!(rec
->ExceptionCode
= virtual_handle_fault( (void *)rec
->ExceptionInformation
[1],
1990 rec
->ExceptionInformation
[0], FALSE
)))
1992 if (rec
->ExceptionCode
== EXCEPTION_ACCESS_VIOLATION
&&
1993 rec
->ExceptionInformation
[0] == EXCEPTION_EXECUTE_FAULT
)
1996 NtQueryInformationProcess( GetCurrentProcess(), ProcessExecuteFlags
,
1997 &flags
, sizeof(flags
), NULL
);
1999 if (!(flags
& MEM_EXECUTE_OPTION_DISABLE_THUNK_EMULATION
) && check_atl_thunk( rec
, context
))
2002 /* send EXCEPTION_EXECUTE_FAULT only if data execution prevention is enabled */
2003 if (!(flags
& MEM_EXECUTE_OPTION_DISABLE
))
2004 rec
->ExceptionInformation
[0] = EXCEPTION_READ_FAULT
;
2008 case EXCEPTION_DATATYPE_MISALIGNMENT
:
2009 /* FIXME: pass through exception handler first? */
2010 if (context
->EFlags
& 0x00040000)
2012 /* Disable AC flag, return */
2013 context
->EFlags
&= ~0x00040000;
2017 case EXCEPTION_BREAKPOINT
:
2020 /* On Wow64, the upper DWORD of Rax contains garbage, and the debug
2021 * service is usually not recognized when called from usermode. */
2022 switch (rec
->ExceptionInformation
[0])
2024 case 1: /* BREAKPOINT_PRINT */
2025 case 3: /* BREAKPOINT_LOAD_SYMBOLS */
2026 case 4: /* BREAKPOINT_UNLOAD_SYMBOLS */
2027 case 5: /* BREAKPOINT_COMMAND_STRING (>= Win2003) */
2033 status
= NtRaiseException( rec
, context
, TRUE
);
2034 raise_status( status
, rec
);
2036 set_cpu_context( context
);
2040 /**********************************************************************
2041 * raise_trap_exception
2043 static void WINAPI
raise_trap_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
2047 if (rec
->ExceptionCode
== EXCEPTION_SINGLE_STEP
)
2049 /* when single stepping can't tell whether this is a hw bp or a
2050 * single step interrupt. try to avoid as much overhead as possible
2051 * and only do a server call if there is any hw bp enabled. */
2053 if( !(context
->EFlags
& 0x100) || (x86_thread_data()->dr7
& 0xff) )
2055 /* (possible) hardware breakpoint, fetch the debug registers */
2056 DWORD saved_flags
= context
->ContextFlags
;
2057 context
->ContextFlags
= CONTEXT_DEBUG_REGISTERS
;
2058 NtGetContextThread(GetCurrentThread(), context
);
2059 context
->ContextFlags
|= saved_flags
; /* restore flags */
2062 context
->EFlags
&= ~0x100; /* clear single-step flag */
2065 status
= NtRaiseException( rec
, context
, TRUE
);
2066 raise_status( status
, rec
);
2070 /**********************************************************************
2071 * raise_generic_exception
2073 * Generic raise function for exceptions that don't need special treatment.
2075 static void WINAPI
raise_generic_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
2079 status
= NtRaiseException( rec
, context
, TRUE
);
2080 raise_status( status
, rec
);
2085 /**********************************************************************
2086 * raise_vm86_sti_exception
2088 static void WINAPI
raise_vm86_sti_exception( EXCEPTION_RECORD
*rec
, CONTEXT
*context
)
2090 /* merge_vm86_pending_flags merges the vm86_pending flag in safely */
2091 get_vm86_teb_info()->vm86_pending
|= VIP_FLAG
;
2093 if (x86_thread_data()->vm86_ptr
)
2095 if (((char*)context
->Eip
>= (char*)vm86_return
) &&
2096 ((char*)context
->Eip
<= (char*)vm86_return_end
) &&
2097 (VM86_TYPE(context
->Eax
) != VM86_SIGNAL
)) {
2098 /* exiting from VM86, can't throw */
2101 merge_vm86_pending_flags( rec
);
2103 else if (get_vm86_teb_info()->dpmi_vif
&&
2104 !wine_ldt_is_system(context
->SegCs
) &&
2105 !wine_ldt_is_system(context
->SegSs
))
2107 /* Executing DPMI code and virtual interrupts are enabled. */
2108 get_vm86_teb_info()->vm86_pending
= 0;
2109 NtRaiseException( rec
, context
, TRUE
);
2112 set_cpu_context( context
);
2116 /**********************************************************************
2119 * Handler for SIGUSR2.
2120 * We use it to signal that the running __wine_enter_vm86() should
2121 * immediately set VIP_FLAG, causing pending events to be handled
2122 * as early as possible.
2124 static void usr2_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
2126 EXCEPTION_RECORD
*rec
= setup_exception( sigcontext
, raise_vm86_sti_exception
);
2127 rec
->ExceptionCode
= EXCEPTION_VM86_STI
;
2129 #endif /* __HAVE_VM86 */
2132 /**********************************************************************
2135 * Handler for SIGSEGV and related errors.
2137 static void segv_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
2140 EXCEPTION_RECORD
*rec
;
2141 ucontext_t
*context
= sigcontext
;
2142 void *stack
= init_handler( sigcontext
, &fs
, &gs
);
2144 /* check for exceptions on the signal stack caused by write watches */
2145 if (get_trap_code(context
) == TRAP_x86_PAGEFLT
&&
2146 (char *)stack
>= (char *)get_signal_stack() &&
2147 (char *)stack
< (char *)get_signal_stack() + signal_stack_size
&&
2148 !virtual_handle_fault( siginfo
->si_addr
, (get_error_code(context
) >> 1) & 0x09, TRUE
))
2153 /* check for page fault inside the thread stack */
2154 if (get_trap_code(context
) == TRAP_x86_PAGEFLT
&&
2155 (char *)siginfo
->si_addr
>= (char *)NtCurrentTeb()->DeallocationStack
&&
2156 (char *)siginfo
->si_addr
< (char *)NtCurrentTeb()->Tib
.StackBase
&&
2157 virtual_handle_stack_fault( siginfo
->si_addr
))
2159 /* check if this was the last guard page */
2160 if ((char *)siginfo
->si_addr
< (char *)NtCurrentTeb()->DeallocationStack
+ 2*4096)
2162 rec
= setup_exception_record( context
, stack
, fs
, gs
, raise_segv_exception
);
2163 rec
->ExceptionCode
= EXCEPTION_STACK_OVERFLOW
;
2168 rec
= setup_exception_record( context
, stack
, fs
, gs
, raise_segv_exception
);
2169 if (rec
->ExceptionCode
== EXCEPTION_STACK_OVERFLOW
) return;
2171 switch(get_trap_code(context
))
2173 case TRAP_x86_OFLOW
: /* Overflow exception */
2174 rec
->ExceptionCode
= EXCEPTION_INT_OVERFLOW
;
2176 case TRAP_x86_BOUND
: /* Bound range exception */
2177 rec
->ExceptionCode
= EXCEPTION_ARRAY_BOUNDS_EXCEEDED
;
2179 case TRAP_x86_PRIVINFLT
: /* Invalid opcode exception */
2180 rec
->ExceptionCode
= EXCEPTION_ILLEGAL_INSTRUCTION
;
2182 case TRAP_x86_STKFLT
: /* Stack fault */
2183 rec
->ExceptionCode
= EXCEPTION_STACK_OVERFLOW
;
2185 case TRAP_x86_SEGNPFLT
: /* Segment not present exception */
2186 case TRAP_x86_PROTFLT
: /* General protection fault */
2187 case TRAP_x86_UNKNOWN
: /* Unknown fault code */
2189 CONTEXT
*win_context
= get_exception_context( rec
);
2190 WORD err
= get_error_code(context
);
2191 if (!err
&& (rec
->ExceptionCode
= is_privileged_instr( win_context
))) break;
2192 if ((err
& 7) == 2 && handle_interrupt( err
>> 3, rec
, win_context
)) break;
2193 rec
->ExceptionCode
= EXCEPTION_ACCESS_VIOLATION
;
2194 rec
->NumberParameters
= 2;
2195 rec
->ExceptionInformation
[0] = 0;
2196 /* if error contains a LDT selector, use that as fault address */
2197 if ((err
& 7) == 4 && !wine_ldt_is_system( err
| 7 ))
2198 rec
->ExceptionInformation
[1] = err
& ~7;
2200 rec
->ExceptionInformation
[1] = 0xffffffff;
2203 case TRAP_x86_PAGEFLT
: /* Page fault */
2204 rec
->ExceptionCode
= EXCEPTION_ACCESS_VIOLATION
;
2205 rec
->NumberParameters
= 2;
2206 rec
->ExceptionInformation
[0] = (get_error_code(context
) >> 1) & 0x09;
2207 rec
->ExceptionInformation
[1] = (ULONG_PTR
)siginfo
->si_addr
;
2209 case TRAP_x86_ALIGNFLT
: /* Alignment check exception */
2210 rec
->ExceptionCode
= EXCEPTION_DATATYPE_MISALIGNMENT
;
2213 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context
) );
2215 case TRAP_x86_NMI
: /* NMI interrupt */
2216 case TRAP_x86_DNA
: /* Device not available exception */
2217 case TRAP_x86_DOUBLEFLT
: /* Double fault exception */
2218 case TRAP_x86_TSSFLT
: /* Invalid TSS exception */
2219 case TRAP_x86_MCHK
: /* Machine check exception */
2220 case TRAP_x86_CACHEFLT
: /* Cache flush exception */
2221 rec
->ExceptionCode
= EXCEPTION_ILLEGAL_INSTRUCTION
;
2227 /**********************************************************************
2230 * Handler for SIGTRAP.
2232 static void trap_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
2234 ucontext_t
*context
= sigcontext
;
2235 EXCEPTION_RECORD
*rec
= setup_exception( context
, raise_trap_exception
);
2237 switch(get_trap_code(context
))
2239 case TRAP_x86_TRCTRAP
: /* Single-step exception */
2240 rec
->ExceptionCode
= EXCEPTION_SINGLE_STEP
;
2242 case TRAP_x86_BPTFLT
: /* Breakpoint exception */
2243 rec
->ExceptionAddress
= (char *)rec
->ExceptionAddress
- 1; /* back up over the int3 instruction */
2246 rec
->ExceptionCode
= EXCEPTION_BREAKPOINT
;
2247 rec
->NumberParameters
= is_wow64
? 1 : 3;
2248 rec
->ExceptionInformation
[0] = 0;
2249 rec
->ExceptionInformation
[1] = 0; /* FIXME */
2250 rec
->ExceptionInformation
[2] = 0; /* FIXME */
2256 /**********************************************************************
2259 * Handler for SIGFPE.
2261 static void fpe_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
2263 CONTEXT
*win_context
;
2264 ucontext_t
*context
= sigcontext
;
2265 EXCEPTION_RECORD
*rec
= setup_exception( context
, raise_generic_exception
);
2267 win_context
= get_exception_context( rec
);
2269 switch(get_trap_code(context
))
2271 case TRAP_x86_DIVIDE
: /* Division by zero exception */
2272 rec
->ExceptionCode
= EXCEPTION_INT_DIVIDE_BY_ZERO
;
2274 case TRAP_x86_FPOPFLT
: /* Coprocessor segment overrun */
2275 rec
->ExceptionCode
= EXCEPTION_FLT_INVALID_OPERATION
;
2277 case TRAP_x86_ARITHTRAP
: /* Floating point exception */
2278 case TRAP_x86_UNKNOWN
: /* Unknown fault code */
2279 rec
->ExceptionCode
= get_fpu_code( win_context
);
2280 rec
->ExceptionAddress
= (LPVOID
)win_context
->FloatSave
.ErrorOffset
;
2282 case TRAP_x86_CACHEFLT
: /* SIMD exception */
2284 * Behaviour only tested for divide-by-zero exceptions
2285 * Check for other SIMD exceptions as well */
2286 if(siginfo
->si_code
!= FPE_FLTDIV
&& siginfo
->si_code
!= FPE_FLTINV
)
2287 FIXME("untested SIMD exception: %#x. Might not work correctly\n",
2290 rec
->ExceptionCode
= STATUS_FLOAT_MULTIPLE_TRAPS
;
2291 rec
->NumberParameters
= 1;
2292 /* no idea what meaning is actually behind this but that's what native does */
2293 rec
->ExceptionInformation
[0] = 0;
2296 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context
) );
2297 rec
->ExceptionCode
= EXCEPTION_FLT_INVALID_OPERATION
;
2303 /**********************************************************************
2306 * Handler for SIGINT.
2308 * FIXME: should not be calling external functions on the signal stack.
2310 static void int_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
2313 init_handler( sigcontext
, &fs
, &gs
);
2314 if (!dispatch_signal(SIGINT
))
2316 EXCEPTION_RECORD
*rec
= setup_exception( sigcontext
, raise_generic_exception
);
2317 rec
->ExceptionCode
= CONTROL_C_EXIT
;
2321 /**********************************************************************
2324 * Handler for SIGABRT.
2326 static void abrt_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
2328 EXCEPTION_RECORD
*rec
= setup_exception( sigcontext
, raise_generic_exception
);
2329 rec
->ExceptionCode
= EXCEPTION_WINE_ASSERTION
;
2330 rec
->ExceptionFlags
= EH_NONCONTINUABLE
;
2334 /**********************************************************************
2337 * Handler for SIGQUIT.
2339 static void quit_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
2342 init_handler( sigcontext
, &fs
, &gs
);
2347 /**********************************************************************
2350 * Handler for SIGUSR1, used to signal a thread that it got suspended.
2352 static void usr1_handler( int signal
, siginfo_t
*siginfo
, void *sigcontext
)
2357 init_handler( sigcontext
, &fs
, &gs
);
2358 save_context( &context
, sigcontext
, fs
, gs
);
2359 wait_suspend( &context
);
2360 restore_context( &context
, sigcontext
);
2364 /***********************************************************************
2365 * __wine_set_signal_handler (NTDLL.@)
2367 int CDECL
__wine_set_signal_handler(unsigned int sig
, wine_signal_handler wsh
)
2369 if (sig
>= sizeof(handlers
) / sizeof(handlers
[0])) return -1;
2370 if (handlers
[sig
] != NULL
) return -2;
2371 handlers
[sig
] = wsh
;
2376 /***********************************************************************
2377 * locking for LDT routines
2379 static RTL_CRITICAL_SECTION ldt_section
;
2380 static RTL_CRITICAL_SECTION_DEBUG critsect_debug
=
2383 { &critsect_debug
.ProcessLocksList
, &critsect_debug
.ProcessLocksList
},
2384 0, 0, { (DWORD_PTR
)(__FILE__
": ldt_section") }
2386 static RTL_CRITICAL_SECTION ldt_section
= { &critsect_debug
, -1, 0, 0, 0, 0 };
2387 static sigset_t ldt_sigset
;
2389 static void ldt_lock(void)
2393 pthread_sigmask( SIG_BLOCK
, &server_block_set
, &sigset
);
2394 RtlEnterCriticalSection( &ldt_section
);
2395 if (ldt_section
.RecursionCount
== 1) ldt_sigset
= sigset
;
2398 static void ldt_unlock(void)
2400 if (ldt_section
.RecursionCount
== 1)
2402 sigset_t sigset
= ldt_sigset
;
2403 RtlLeaveCriticalSection( &ldt_section
);
2404 pthread_sigmask( SIG_SETMASK
, &sigset
, NULL
);
2406 else RtlLeaveCriticalSection( &ldt_section
);
2410 /**********************************************************************
2411 * signal_alloc_thread
2413 NTSTATUS
signal_alloc_thread( TEB
**teb
)
2415 static size_t sigstack_zero_bits
;
2416 struct x86_thread_data
*thread_data
;
2421 if (!sigstack_zero_bits
)
2423 size_t min_size
= teb_size
+ max( MINSIGSTKSZ
, 8192 );
2424 /* find the first power of two not smaller than min_size */
2425 sigstack_zero_bits
= 12;
2426 while ((1u << sigstack_zero_bits
) < min_size
) sigstack_zero_bits
++;
2427 signal_stack_mask
= (1 << sigstack_zero_bits
) - 1;
2428 signal_stack_size
= (1 << sigstack_zero_bits
) - teb_size
;
2431 size
= signal_stack_mask
+ 1;
2432 if (!(status
= NtAllocateVirtualMemory( NtCurrentProcess(), &addr
, sigstack_zero_bits
,
2433 &size
, MEM_COMMIT
| MEM_TOP_DOWN
, PAGE_READWRITE
)))
2436 (*teb
)->Tib
.Self
= &(*teb
)->Tib
;
2437 (*teb
)->Tib
.ExceptionList
= (void *)~0UL;
2438 thread_data
= (struct x86_thread_data
*)(*teb
)->SystemReserved2
;
2439 if (!(thread_data
->fs
= wine_ldt_alloc_fs()))
2442 NtFreeVirtualMemory( NtCurrentProcess(), &addr
, &size
, MEM_RELEASE
);
2443 status
= STATUS_TOO_MANY_THREADS
;
2450 /**********************************************************************
2451 * signal_free_thread
2453 void signal_free_thread( TEB
*teb
)
2456 struct x86_thread_data
*thread_data
= (struct x86_thread_data
*)teb
->SystemReserved2
;
2458 if (thread_data
) wine_ldt_free_fs( thread_data
->fs
);
2459 if (teb
->DeallocationStack
)
2462 NtFreeVirtualMemory( GetCurrentProcess(), &teb
->DeallocationStack
, &size
, MEM_RELEASE
);
2465 NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb
, &size
, MEM_RELEASE
);
2469 /**********************************************************************
2470 * signal_init_thread
2472 void signal_init_thread( TEB
*teb
)
2474 const WORD fpu_cw
= 0x27f;
2475 struct x86_thread_data
*thread_data
= (struct x86_thread_data
*)teb
->SystemReserved2
;
2480 int mib
[2], val
= 1;
2483 mib
[1] = KERN_THALTSTACK
;
2484 sysctl( mib
, 2, NULL
, NULL
, &val
, sizeof(val
) );
2487 ss
.ss_sp
= (char *)teb
+ teb_size
;
2488 ss
.ss_size
= signal_stack_size
;
2490 if (sigaltstack(&ss
, NULL
) == -1) perror( "sigaltstack" );
2492 wine_ldt_set_base( &fs_entry
, teb
);
2493 wine_ldt_set_limit( &fs_entry
, teb_size
- 1 );
2494 wine_ldt_set_flags( &fs_entry
, WINE_LDT_FLAGS_DATA
|WINE_LDT_FLAGS_32BIT
);
2495 wine_ldt_init_fs( thread_data
->fs
, &fs_entry
);
2496 thread_data
->gs
= wine_get_gs();
2499 __asm__
volatile ("fninit; fldcw %0" : : "m" (fpu_cw
));
2501 FIXME("FPU setup not implemented for this platform.\n");
2505 /**********************************************************************
2506 * signal_init_process
2508 void signal_init_process(void)
2510 struct sigaction sig_act
;
2512 sig_act
.sa_mask
= server_block_set
;
2513 sig_act
.sa_flags
= SA_SIGINFO
| SA_RESTART
;
2515 sig_act
.sa_flags
|= SA_ONSTACK
;
2518 sig_act
.sa_flags
|= SA_RESTORER
;
2519 sig_act
.sa_restorer
= rt_sigreturn
;
2521 sig_act
.sa_sigaction
= int_handler
;
2522 if (sigaction( SIGINT
, &sig_act
, NULL
) == -1) goto error
;
2523 sig_act
.sa_sigaction
= fpe_handler
;
2524 if (sigaction( SIGFPE
, &sig_act
, NULL
) == -1) goto error
;
2525 sig_act
.sa_sigaction
= abrt_handler
;
2526 if (sigaction( SIGABRT
, &sig_act
, NULL
) == -1) goto error
;
2527 sig_act
.sa_sigaction
= quit_handler
;
2528 if (sigaction( SIGQUIT
, &sig_act
, NULL
) == -1) goto error
;
2529 sig_act
.sa_sigaction
= usr1_handler
;
2530 if (sigaction( SIGUSR1
, &sig_act
, NULL
) == -1) goto error
;
2532 sig_act
.sa_sigaction
= segv_handler
;
2533 if (sigaction( SIGSEGV
, &sig_act
, NULL
) == -1) goto error
;
2534 if (sigaction( SIGILL
, &sig_act
, NULL
) == -1) goto error
;
2536 if (sigaction( SIGBUS
, &sig_act
, NULL
) == -1) goto error
;
2540 sig_act
.sa_sigaction
= trap_handler
;
2541 if (sigaction( SIGTRAP
, &sig_act
, NULL
) == -1) goto error
;
2545 sig_act
.sa_sigaction
= usr2_handler
;
2546 if (sigaction( SIGUSR2
, &sig_act
, NULL
) == -1) goto error
;
2549 wine_ldt_init_locking( ldt_lock
, ldt_unlock
);
2553 perror("sigaction");
2559 /**********************************************************************
2560 * __wine_enter_vm86 (NTDLL.@)
2562 * Enter vm86 mode with the specified register context.
2564 void __wine_enter_vm86( CONTEXT
*context
)
2566 EXCEPTION_RECORD rec
;
2568 struct vm86plus_struct vm86
;
2570 memset( &vm86
, 0, sizeof(vm86
) );
2573 restore_vm86_context( context
, &vm86
);
2575 x86_thread_data()->vm86_ptr
= &vm86
;
2576 merge_vm86_pending_flags( &rec
);
2578 res
= vm86_enter( &x86_thread_data()->vm86_ptr
); /* uses and clears teb->vm86_ptr */
2585 save_vm86_context( context
, &vm86
);
2587 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
2588 rec
.ExceptionRecord
= NULL
;
2589 rec
.ExceptionAddress
= (LPVOID
)context
->Eip
;
2590 rec
.NumberParameters
= 0;
2592 switch(VM86_TYPE(res
))
2594 case VM86_UNKNOWN
: /* unhandled GP fault - IO-instruction or similar */
2595 rec
.ExceptionCode
= EXCEPTION_PRIV_INSTRUCTION
;
2597 case VM86_TRAP
: /* return due to DOS-debugger request */
2598 switch(VM86_ARG(res
))
2600 case TRAP_x86_TRCTRAP
: /* Single-step exception */
2601 rec
.ExceptionCode
= EXCEPTION_SINGLE_STEP
;
2603 case TRAP_x86_BPTFLT
: /* Breakpoint exception */
2604 rec
.ExceptionAddress
= (char *)rec
.ExceptionAddress
- 1; /* back up over the int3 instruction */
2607 rec
.ExceptionCode
= EXCEPTION_BREAKPOINT
;
2611 case VM86_INTx
: /* int3/int x instruction (ARG = x) */
2612 rec
.ExceptionCode
= EXCEPTION_VM86_INTx
;
2613 rec
.NumberParameters
= 1;
2614 rec
.ExceptionInformation
[0] = VM86_ARG(res
);
2616 case VM86_STI
: /* sti/popf/iret instruction enabled virtual interrupts */
2617 context
->EFlags
|= VIF_FLAG
;
2618 context
->EFlags
&= ~VIP_FLAG
;
2619 get_vm86_teb_info()->vm86_pending
= 0;
2620 rec
.ExceptionCode
= EXCEPTION_VM86_STI
;
2622 case VM86_PICRETURN
: /* return due to pending PIC request */
2623 rec
.ExceptionCode
= EXCEPTION_VM86_PICRETURN
;
2625 case VM86_SIGNAL
: /* cannot happen because vm86_enter handles this case */
2627 WINE_ERR( "unhandled result from vm86 mode %x\n", res
);
2630 raise_exception( &rec
, context
, TRUE
);
2634 #else /* __HAVE_VM86 */
2635 /**********************************************************************
2636 * __wine_enter_vm86 (NTDLL.@)
2638 void __wine_enter_vm86( CONTEXT
*context
)
2640 MESSAGE("vm86 mode not supported on this platform\n");
2642 #endif /* __HAVE_VM86 */
2645 /*******************************************************************
2646 * RtlUnwind (NTDLL.@)
2648 void WINAPI DECLSPEC_HIDDEN
__regs_RtlUnwind( EXCEPTION_REGISTRATION_RECORD
* pEndFrame
, PVOID targetIp
,
2649 PEXCEPTION_RECORD pRecord
, PVOID retval
, CONTEXT
*context
)
2651 EXCEPTION_RECORD record
;
2652 EXCEPTION_REGISTRATION_RECORD
*frame
, *dispatch
;
2655 context
->Eax
= (DWORD
)retval
;
2657 /* build an exception record, if we do not have one */
2660 record
.ExceptionCode
= STATUS_UNWIND
;
2661 record
.ExceptionFlags
= 0;
2662 record
.ExceptionRecord
= NULL
;
2663 record
.ExceptionAddress
= (void *)context
->Eip
;
2664 record
.NumberParameters
= 0;
2668 pRecord
->ExceptionFlags
|= EH_UNWINDING
| (pEndFrame
? 0 : EH_EXIT_UNWIND
);
2670 TRACE( "code=%x flags=%x\n", pRecord
->ExceptionCode
, pRecord
->ExceptionFlags
);
2671 TRACE( "eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n",
2672 context
->Eax
, context
->Ebx
, context
->Ecx
, context
->Edx
, context
->Esi
, context
->Edi
);
2673 TRACE( "ebp=%08x esp=%08x eip=%08x cs=%04x ds=%04x fs=%04x gs=%04x flags=%08x\n",
2674 context
->Ebp
, context
->Esp
, context
->Eip
, LOWORD(context
->SegCs
), LOWORD(context
->SegDs
),
2675 LOWORD(context
->SegFs
), LOWORD(context
->SegGs
), context
->EFlags
);
2677 /* get chain of exception frames */
2678 frame
= NtCurrentTeb()->Tib
.ExceptionList
;
2679 while ((frame
!= (EXCEPTION_REGISTRATION_RECORD
*)~0UL) && (frame
!= pEndFrame
))
2681 /* Check frame address */
2682 if (pEndFrame
&& (frame
> pEndFrame
))
2683 raise_status( STATUS_INVALID_UNWIND_TARGET
, pRecord
);
2685 if (!is_valid_frame( frame
)) raise_status( STATUS_BAD_STACK
, pRecord
);
2688 TRACE( "calling handler at %p code=%x flags=%x\n",
2689 frame
->Handler
, pRecord
->ExceptionCode
, pRecord
->ExceptionFlags
);
2690 res
= EXC_CallHandler( pRecord
, frame
, context
, &dispatch
, frame
->Handler
, unwind_handler
);
2691 TRACE( "handler at %p returned %x\n", frame
->Handler
, res
);
2695 case ExceptionContinueSearch
:
2697 case ExceptionCollidedUnwind
:
2701 raise_status( STATUS_INVALID_DISPOSITION
, pRecord
);
2704 frame
= __wine_pop_frame( frame
);
2707 NtSetContextThread( GetCurrentThread(), context
);
2709 __ASM_STDCALL_FUNC( RtlUnwind
, 16,
2711 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2712 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2713 "movl %esp,%ebp\n\t"
2714 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2715 "leal -(0x2cc+8)(%esp),%esp\n\t" /* sizeof(CONTEXT) + alignment */
2716 "pushl %esp\n\t" /* context */
2717 "call " __ASM_NAME("RtlCaptureContext") __ASM_STDCALL(4) "\n\t"
2718 "leal 24(%ebp),%eax\n\t"
2719 "movl %eax,0xc4(%esp)\n\t" /* context->Esp */
2721 "pushl 20(%ebp)\n\t"
2722 "pushl 16(%ebp)\n\t"
2723 "pushl 12(%ebp)\n\t"
2725 "call " __ASM_NAME("__regs_RtlUnwind") __ASM_STDCALL(20) "\n\t"
2727 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2728 __ASM_CFI(".cfi_same_value %ebp\n\t")
2729 "ret $16" ) /* actually never returns */
2732 /*******************************************************************
2733 * NtRaiseException (NTDLL.@)
2735 NTSTATUS WINAPI
NtRaiseException( EXCEPTION_RECORD
*rec
, CONTEXT
*context
, BOOL first_chance
)
2737 NTSTATUS status
= raise_exception( rec
, context
, first_chance
);
2738 if (status
== STATUS_SUCCESS
) NtSetContextThread( GetCurrentThread(), context
);
2743 /***********************************************************************
2744 * RtlRaiseException (NTDLL.@)
2746 __ASM_STDCALL_FUNC( RtlRaiseException
, 4,
2748 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2749 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2750 "movl %esp,%ebp\n\t"
2751 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2752 "leal -0x2cc(%esp),%esp\n\t" /* sizeof(CONTEXT) */
2753 "pushl %esp\n\t" /* context */
2754 "call " __ASM_NAME("RtlCaptureContext") __ASM_STDCALL(4) "\n\t"
2755 "movl 4(%ebp),%eax\n\t" /* return address */
2756 "movl 8(%ebp),%ecx\n\t" /* rec */
2757 "movl %eax,12(%ecx)\n\t" /* rec->ExceptionAddress */
2758 "leal 12(%ebp),%eax\n\t"
2759 "movl %eax,0xc4(%esp)\n\t" /* context->Esp */
2760 "movl %esp,%eax\n\t"
2764 "call " __ASM_NAME("NtRaiseException") __ASM_STDCALL(12) "\n\t"
2766 "call " __ASM_NAME("RtlRaiseStatus") __ASM_STDCALL(4) "\n\t"
2768 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2769 __ASM_CFI(".cfi_same_value %ebp\n\t")
2770 "ret $4" ) /* actually never returns */
2773 /*************************************************************************
2774 * RtlCaptureStackBackTrace (NTDLL.@)
2776 USHORT WINAPI
RtlCaptureStackBackTrace( ULONG skip
, ULONG count
, PVOID
*buffer
, ULONG
*hash
)
2782 RtlCaptureContext( &context
);
2783 if (hash
) *hash
= 0;
2784 frame
= (ULONG
*)context
.Ebp
;
2788 if (!is_valid_frame( frame
)) return 0;
2789 frame
= (ULONG
*)*frame
;
2792 for (i
= 0; i
< count
; i
++)
2794 if (!is_valid_frame( frame
)) break;
2795 buffer
[i
] = (void *)frame
[1];
2796 if (hash
) *hash
+= frame
[1];
2797 frame
= (ULONG
*)*frame
;
2803 extern void DECLSPEC_NORETURN
call_thread_entry_point( LPTHREAD_START_ROUTINE entry
, void *arg
);
2804 __ASM_GLOBAL_FUNC( call_thread_entry_point
,
2806 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2807 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2808 "movl %esp,%ebp\n\t"
2809 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2811 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2813 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
2815 __ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
2817 "pushl 12(%ebp)\n\t"
2819 "call " __ASM_NAME("call_thread_func") );
2821 extern void DECLSPEC_NORETURN
call_thread_exit_func( int status
, void (*func
)(int), void *frame
);
2822 __ASM_GLOBAL_FUNC( call_thread_exit_func
,
2823 "movl 4(%esp),%eax\n\t"
2824 "movl 8(%esp),%ecx\n\t"
2825 "movl 12(%esp),%ebp\n\t"
2826 __ASM_CFI(".cfi_def_cfa %ebp,4\n\t")
2827 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2828 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2829 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
2830 __ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
2831 "leal -20(%ebp),%esp\n\t"
2835 /* wrapper for apps that don't declare the thread function correctly */
2836 extern void DECLSPEC_NORETURN
call_thread_func_wrapper( LPTHREAD_START_ROUTINE entry
, void *arg
);
2837 __ASM_GLOBAL_FUNC(call_thread_func_wrapper
,
2839 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2840 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2841 "movl %esp,%ebp\n\t"
2842 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2844 "pushl 12(%ebp)\n\t"
2846 "leal -4(%ebp),%esp\n\t"
2848 "call " __ASM_NAME("exit_thread") "\n\t"
2851 /***********************************************************************
2854 void DECLSPEC_HIDDEN
call_thread_func( LPTHREAD_START_ROUTINE entry
, void *arg
, void *frame
)
2856 x86_thread_data()->exit_frame
= frame
;
2859 call_thread_func_wrapper( entry
, arg
);
2861 __EXCEPT(unhandled_exception_filter
)
2863 NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
2866 abort(); /* should not be reached */
2869 /***********************************************************************
2870 * RtlExitUserThread (NTDLL.@)
2872 void WINAPI
RtlExitUserThread( ULONG status
)
2874 if (!x86_thread_data()->exit_frame
) exit_thread( status
);
2875 call_thread_exit_func( status
, exit_thread
, x86_thread_data()->exit_frame
);
2878 /***********************************************************************
2881 void abort_thread( int status
)
2883 if (!x86_thread_data()->exit_frame
) terminate_thread( status
);
2884 call_thread_exit_func( status
, terminate_thread
, x86_thread_data()->exit_frame
);
2887 /**********************************************************************
2888 * DbgBreakPoint (NTDLL.@)
2890 __ASM_STDCALL_FUNC( DbgBreakPoint
, 0, "int $3; ret")
2892 /**********************************************************************
2893 * DbgUserBreakPoint (NTDLL.@)
2895 __ASM_STDCALL_FUNC( DbgUserBreakPoint
, 0, "int $3; ret")
2897 /**********************************************************************
2898 * NtCurrentTeb (NTDLL.@)
2900 __ASM_STDCALL_FUNC( NtCurrentTeb
, 0, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" )
2903 /**************************************************************************
2906 __ASM_STDCALL_FUNC( _chkstk
, 0,
2908 "addl %esp,%eax\n\t"
2909 "xchgl %esp,%eax\n\t"
2910 "movl 0(%eax),%eax\n\t" /* copy return address from old location */
2911 "movl %eax,0(%esp)\n\t"
2914 /**************************************************************************
2915 * _alloca_probe (NTDLL.@)
2917 __ASM_STDCALL_FUNC( _alloca_probe
, 0,
2919 "addl %esp,%eax\n\t"
2920 "xchgl %esp,%eax\n\t"
2921 "movl 0(%eax),%eax\n\t" /* copy return address from old location */
2922 "movl %eax,0(%esp)\n\t"
2926 /**********************************************************************
2927 * EXC_CallHandler (internal)
2929 * Some exception handlers depend on EBP to have a fixed position relative to
2930 * the exception frame.
2931 * Shrinker depends on (*1) doing what it does,
2932 * (*2) being the exact instruction it is and (*3) beginning with 0x64
2933 * (i.e. the %fs prefix to the movl instruction). It also depends on the
2934 * function calling the handler having only 5 parameters (*4).
2936 __ASM_GLOBAL_FUNC( EXC_CallHandler
,
2938 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2939 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2940 "movl %esp,%ebp\n\t"
2941 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2943 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2944 "movl 28(%ebp), %edx\n\t" /* ugly hack to pass the 6th param needed because of Shrinker */
2945 "pushl 24(%ebp)\n\t"
2946 "pushl 20(%ebp)\n\t"
2947 "pushl 16(%ebp)\n\t"
2948 "pushl 12(%ebp)\n\t"
2950 "call " __ASM_NAME("call_exception_handler") "\n\t"
2952 __ASM_CFI(".cfi_same_value %ebx\n\t")
2954 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2955 __ASM_CFI(".cfi_same_value %ebp\n\t")
2957 __ASM_GLOBAL_FUNC(call_exception_handler
,
2959 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2960 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2961 "movl %esp,%ebp\n\t"
2962 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2964 "pushl 12(%ebp)\n\t" /* make any exceptions in this... */
2965 "pushl %edx\n\t" /* handler be handled by... */
2967 "pushl (0)\n\t" /* nested_handler (passed in edx). */
2969 "movl %esp,(0)\n\t" /* push the new exception frame onto the exception stack. */
2970 "pushl 20(%ebp)\n\t"
2971 "pushl 16(%ebp)\n\t"
2972 "pushl 12(%ebp)\n\t"
2974 "movl 24(%ebp), %ecx\n\t" /* (*1) */
2975 "call *%ecx\n\t" /* call handler. (*2) */
2977 "movl (0), %esp\n\t" /* restore previous... (*3) */
2979 "popl (0)\n\t" /* exception frame. */
2980 "movl %ebp, %esp\n\t" /* restore saved stack, in case it was corrupted */
2982 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2983 __ASM_CFI(".cfi_same_value %ebp\n\t")
2984 "ret $20" ) /* (*4) */
2986 #endif /* __i386__ */