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ntdll: Directly use ucontext_t instead of SIGCONTEXT on all platforms.
[wine/wine-gecko.git] / dlls / ntdll / signal_i386.c
blob52aeb60a3b93b6278db3d8f27a946aac754f0caa
1 /*
2 * i386 signal handling routines
3 *
4 * Copyright 1999 Alexandre Julliard
5 *
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.
10 *
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.
15 *
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
19 */
20
21 #ifdef __i386__
22
23 #include "config.h"
24 #include "wine/port.h"
25
26 #include <errno.h>
27 #include <signal.h>
28 #include <stdlib.h>
29 #include <stdarg.h>
30 #include <stdio.h>
31 #include <sys/types.h>
32 #ifdef HAVE_UNISTD_H
33 # include <unistd.h>
34 #endif
35 #ifdef HAVE_SYS_PARAM_H
36 # include <sys/param.h>
37 #endif
38 #ifdef HAVE_SYSCALL_H
39 # include <syscall.h>
40 #else
41 # ifdef HAVE_SYS_SYSCALL_H
42 # include <sys/syscall.h>
43 # endif
44 #endif
45 #ifdef HAVE_SYS_VM86_H
46 # include <sys/vm86.h>
47 #endif
48 #ifdef HAVE_SYS_SIGNAL_H
49 # include <sys/signal.h>
50 #endif
51 #ifdef HAVE_SYS_SYSCTL_H
52 # include <sys/sysctl.h>
53 #endif
54 #ifdef HAVE_SYS_UCONTEXT_H
55 # include <sys/ucontext.h>
56 #endif
57
58 #include "ntstatus.h"
59 #define WIN32_NO_STATUS
60 #include "windef.h"
61 #include "wine/library.h"
62 #include "ntdll_misc.h"
63 #include "wine/exception.h"
64 #include "wine/debug.h"
65
66 #ifdef HAVE_VALGRIND_MEMCHECK_H
67 #include <valgrind/memcheck.h>
68 #endif
69
70 #undef ERR /* Solaris needs to define this */
71
72 /* not defined for x86, so copy the x86_64 definition */
73 typedef struct DECLSPEC_ALIGN(16) _M128A
74 {
75 ULONGLONG Low;
76 LONGLONG High;
77 } M128A;
78
79 typedef struct
80 {
81 WORD ControlWord;
82 WORD StatusWord;
83 BYTE TagWord;
84 BYTE Reserved1;
85 WORD ErrorOpcode;
86 DWORD ErrorOffset;
87 WORD ErrorSelector;
88 WORD Reserved2;
89 DWORD DataOffset;
90 WORD DataSelector;
91 WORD Reserved3;
92 DWORD MxCsr;
93 DWORD MxCsr_Mask;
94 M128A FloatRegisters[8];
95 M128A XmmRegisters[16];
96 BYTE Reserved4[96];
97 } XMM_SAVE_AREA32;
98
99 /***********************************************************************
100 * signal context platform-specific definitions
101 */
102
103 #ifdef __ANDROID__
104
105 #ifndef HAVE_SYS_UCONTEXT_H
106 typedef struct ucontext
107 {
108 unsigned long uc_flags;
109 struct ucontext *uc_link;
110 stack_t uc_stack;
111 struct sigcontext uc_mcontext;
112 sigset_t uc_sigmask;
113 } ucontext_t;
114 #endif
115
116 #define EAX_sig(context) ((context)->uc_mcontext.eax)
117 #define EBX_sig(context) ((context)->uc_mcontext.ebx)
118 #define ECX_sig(context) ((context)->uc_mcontext.ecx)
119 #define EDX_sig(context) ((context)->uc_mcontext.edx)
120 #define ESI_sig(context) ((context)->uc_mcontext.esi)
121 #define EDI_sig(context) ((context)->uc_mcontext.edi)
122 #define EBP_sig(context) ((context)->uc_mcontext.ebp)
123 #define ESP_sig(context) ((context)->uc_mcontext.esp)
124
125 #define CS_sig(context) ((context)->uc_mcontext.cs)
126 #define DS_sig(context) ((context)->uc_mcontext.ds)
127 #define ES_sig(context) ((context)->uc_mcontext.es)
128 #define SS_sig(context) ((context)->uc_mcontext.ss)
129 #define FS_sig(context) ((context)->uc_mcontext.fs)
130 #define GS_sig(context) ((context)->uc_mcontext.gs)
131
132 #define EFL_sig(context) ((context)->uc_mcontext.eflags)
133 #define EIP_sig(context) ((context)->uc_mcontext.eip)
134 #define TRAP_sig(context) ((context)->uc_mcontext.trapno)
135 #define ERROR_sig(context) ((context)->uc_mcontext.err)
136
137 #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->uc_mcontext.fpstate))
138 #define FPUX_sig(context) (FPU_sig(context) && !((context)->uc_mcontext.fpstate->status >> 16) ? (XMM_SAVE_AREA32 *)(FPU_sig(context) + 1) : NULL)
139
140 /* custom signal restorer since we may have unmapped the one in vdso, and bionic doesn't check for that */
141 void rt_sigreturn(void);
142 __ASM_GLOBAL_FUNC( rt_sigreturn,
143 "movl $173,%eax\n\t" /* NR_rt_sigreturn */
144 "int $0x80" );
145
146 #elif defined (__linux__)
147
148 #define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX])
149 #define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX])
150 #define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX])
151 #define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX])
152 #define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI])
153 #define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI])
154 #define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP])
155 #define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP])
156
157 #define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS])
158 #define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS])
159 #define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES])
160 #define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS])
161 #define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS])
162 #define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS])
163
164 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
165 #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
166 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
167 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
168
169 #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->uc_mcontext.fpregs))
170 #define FPUX_sig(context) (FPU_sig(context) && !((context)->uc_mcontext.fpregs->status >> 16) ? (XMM_SAVE_AREA32 *)(FPU_sig(context) + 1) : NULL)
171
172 #define VM86_EAX 0 /* the %eax value while vm86_enter is executing */
173 #define VIF_FLAG 0x00080000
174 #define VIP_FLAG 0x00100000
175
176 int vm86_enter( void **vm86_ptr );
177 void vm86_return(void);
178 void vm86_return_end(void);
179 __ASM_GLOBAL_FUNC(vm86_enter,
180 "pushl %ebp\n\t"
181 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
182 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
183 "movl %esp,%ebp\n\t"
184 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
185 "pushl %ebx\n\t"
186 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
187 "movl $166,%eax\n\t" /*SYS_vm86*/
188 "movl 8(%ebp),%ecx\n\t" /* vm86_ptr */
189 "movl (%ecx),%ecx\n\t"
190 "movl $1,%ebx\n\t" /*VM86_ENTER*/
191 "pushl %ecx\n\t" /* put vm86plus_struct ptr somewhere we can find it */
192 "pushl %fs\n\t"
193 "pushl %gs\n\t"
194 "int $0x80\n"
195 ".globl " __ASM_NAME("vm86_return") "\n\t"
196 __ASM_FUNC("vm86_return") "\n"
197 __ASM_NAME("vm86_return") ":\n\t"
198 "popl %gs\n\t"
199 "popl %fs\n\t"
200 "popl %ecx\n\t"
201 "popl %ebx\n\t"
202 __ASM_CFI(".cfi_same_value %ebx\n\t")
203 "popl %ebp\n\t"
204 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
205 __ASM_CFI(".cfi_same_value %ebp\n\t")
206 "testl %eax,%eax\n\t"
207 "jl 0f\n\t"
208 "cmpb $0,%al\n\t" /* VM86_SIGNAL */
209 "je " __ASM_NAME("vm86_enter") "\n\t"
210 "0:\n\t"
211 "movl 4(%esp),%ecx\n\t" /* vm86_ptr */
212 "movl $0,(%ecx)\n\t"
213 ".globl " __ASM_NAME("vm86_return_end") "\n\t"
214 __ASM_FUNC("vm86_return_end") "\n"
215 __ASM_NAME("vm86_return_end") ":\n\t"
216 "ret" )
217
218 #ifdef HAVE_SYS_VM86_H
219 # define __HAVE_VM86
220 #endif
221
222 #elif defined (__BSDI__)
223
224 #include <machine/frame.h>
225 typedef struct trapframe ucontext_t;
226
227 #define EAX_sig(context) ((context)->tf_eax)
228 #define EBX_sig(context) ((context)->tf_ebx)
229 #define ECX_sig(context) ((context)->tf_ecx)
230 #define EDX_sig(context) ((context)->tf_edx)
231 #define ESI_sig(context) ((context)->tf_esi)
232 #define EDI_sig(context) ((context)->tf_edi)
233 #define EBP_sig(context) ((context)->tf_ebp)
234
235 #define CS_sig(context) ((context)->tf_cs)
236 #define DS_sig(context) ((context)->tf_ds)
237 #define ES_sig(context) ((context)->tf_es)
238 #define SS_sig(context) ((context)->tf_ss)
239
240 #define EFL_sig(context) ((context)->tf_eflags)
241
242 #define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
243 #define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
244
245 #define FPU_sig(context) NULL /* FIXME */
246 #define FPUX_sig(context) NULL /* FIXME */
247
248 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
249
250 #include <machine/trap.h>
251
252 #define EAX_sig(context) ((context)->sc_eax)
253 #define EBX_sig(context) ((context)->sc_ebx)
254 #define ECX_sig(context) ((context)->sc_ecx)
255 #define EDX_sig(context) ((context)->sc_edx)
256 #define ESI_sig(context) ((context)->sc_esi)
257 #define EDI_sig(context) ((context)->sc_edi)
258 #define EBP_sig(context) ((context)->sc_ebp)
259
260 #define CS_sig(context) ((context)->sc_cs)
261 #define DS_sig(context) ((context)->sc_ds)
262 #define ES_sig(context) ((context)->sc_es)
263 #define FS_sig(context) ((context)->sc_fs)
264 #define GS_sig(context) ((context)->sc_gs)
265 #define SS_sig(context) ((context)->sc_ss)
266
267 #define TRAP_sig(context) ((context)->sc_trapno)
268 #define ERROR_sig(context) ((context)->sc_err)
269 #define EFL_sig(context) ((context)->sc_eflags)
270
271 #define EIP_sig(context) ((context)->sc_eip)
272 #define ESP_sig(context) ((context)->sc_esp)
273
274 #define FPU_sig(context) NULL /* FIXME */
275 #define FPUX_sig(context) NULL /* FIXME */
276
277 #elif defined (__OpenBSD__)
278
279 #define EAX_sig(context) ((context)->sc_eax)
280 #define EBX_sig(context) ((context)->sc_ebx)
281 #define ECX_sig(context) ((context)->sc_ecx)
282 #define EDX_sig(context) ((context)->sc_edx)
283 #define ESI_sig(context) ((context)->sc_esi)
284 #define EDI_sig(context) ((context)->sc_edi)
285 #define EBP_sig(context) ((context)->sc_ebp)
286
287 #define CS_sig(context) ((context)->sc_cs)
288 #define DS_sig(context) ((context)->sc_ds)
289 #define ES_sig(context) ((context)->sc_es)
290 #define FS_sig(context) ((context)->sc_fs)
291 #define GS_sig(context) ((context)->sc_gs)
292 #define SS_sig(context) ((context)->sc_ss)
293
294 #define TRAP_sig(context) ((context)->sc_trapno)
295 #define ERROR_sig(context) ((context)->sc_err)
296 #define EFL_sig(context) ((context)->sc_eflags)
297
298 #define EIP_sig(context) ((context)->sc_eip)
299 #define ESP_sig(context) ((context)->sc_esp)
300
301 #define FPU_sig(context) NULL /* FIXME */
302 #define FPUX_sig(context) NULL /* FIXME */
303
304 #define T_MCHK T_MACHK
305 #define T_XMMFLT T_XFTRAP
306
307 #elif defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
308
309 #ifdef _SCO_DS
310 #include <sys/regset.h>
311 #define gregs regs
312 #endif
313
314 #define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
315 #define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
316 #define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
317 #define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
318 #define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
319 #define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
320 #define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
321
322 #define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
323 #define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
324 #define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
325 #define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
326
327 #define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
328 #define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
329
330 #define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
331
332 #define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
333 #ifdef UESP
334 #define ESP_sig(context) ((context)->uc_mcontext.gregs[UESP])
335 #elif defined(R_ESP)
336 #define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
337 #else
338 #define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
339 #endif
340 #ifdef ERR
341 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[ERR])
342 #endif
343 #ifdef TRAPNO
344 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
345 #endif
346
347 #define FPU_sig(context) NULL /* FIXME */
348 #define FPUX_sig(context) NULL /* FIXME */
349
350 #elif defined (__APPLE__)
351
352 /* work around silly renaming of struct members in OS X 10.5 */
353 #if __DARWIN_UNIX03 && defined(_STRUCT_X86_EXCEPTION_STATE32)
354 #define EAX_sig(context) ((context)->uc_mcontext->__ss.__eax)
355 #define EBX_sig(context) ((context)->uc_mcontext->__ss.__ebx)
356 #define ECX_sig(context) ((context)->uc_mcontext->__ss.__ecx)
357 #define EDX_sig(context) ((context)->uc_mcontext->__ss.__edx)
358 #define ESI_sig(context) ((context)->uc_mcontext->__ss.__esi)
359 #define EDI_sig(context) ((context)->uc_mcontext->__ss.__edi)
360 #define EBP_sig(context) ((context)->uc_mcontext->__ss.__ebp)
361 #define CS_sig(context) ((context)->uc_mcontext->__ss.__cs)
362 #define DS_sig(context) ((context)->uc_mcontext->__ss.__ds)
363 #define ES_sig(context) ((context)->uc_mcontext->__ss.__es)
364 #define FS_sig(context) ((context)->uc_mcontext->__ss.__fs)
365 #define GS_sig(context) ((context)->uc_mcontext->__ss.__gs)
366 #define SS_sig(context) ((context)->uc_mcontext->__ss.__ss)
367 #define EFL_sig(context) ((context)->uc_mcontext->__ss.__eflags)
368 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__eip))
369 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__esp))
370 #define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno)
371 #define ERROR_sig(context) ((context)->uc_mcontext->__es.__err)
372 #define FPU_sig(context) NULL
373 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->__fs.__fpu_fcw)
374 #else
375 #define EAX_sig(context) ((context)->uc_mcontext->ss.eax)
376 #define EBX_sig(context) ((context)->uc_mcontext->ss.ebx)
377 #define ECX_sig(context) ((context)->uc_mcontext->ss.ecx)
378 #define EDX_sig(context) ((context)->uc_mcontext->ss.edx)
379 #define ESI_sig(context) ((context)->uc_mcontext->ss.esi)
380 #define EDI_sig(context) ((context)->uc_mcontext->ss.edi)
381 #define EBP_sig(context) ((context)->uc_mcontext->ss.ebp)
382 #define CS_sig(context) ((context)->uc_mcontext->ss.cs)
383 #define DS_sig(context) ((context)->uc_mcontext->ss.ds)
384 #define ES_sig(context) ((context)->uc_mcontext->ss.es)
385 #define FS_sig(context) ((context)->uc_mcontext->ss.fs)
386 #define GS_sig(context) ((context)->uc_mcontext->ss.gs)
387 #define SS_sig(context) ((context)->uc_mcontext->ss.ss)
388 #define EFL_sig(context) ((context)->uc_mcontext->ss.eflags)
389 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip))
390 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.esp))
391 #define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
392 #define ERROR_sig(context) ((context)->uc_mcontext->es.err)
393 #define FPU_sig(context) NULL
394 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->fs.fpu_fcw)
395 #endif
396
397 #elif defined(__NetBSD__)
398
399 #define EAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EAX])
400 #define EBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBX])
401 #define ECX_sig(context) ((context)->uc_mcontext.__gregs[_REG_ECX])
402 #define EDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDX])
403 #define ESI_sig(context) ((context)->uc_mcontext.__gregs[_REG_ESI])
404 #define EDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDI])
405 #define EBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBP])
406 #define ESP_sig(context) _UC_MACHINE_SP(context)
407
408 #define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
409 #define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
410 #define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
411 #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
412 #define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
413 #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
414
415 #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_EFL])
416 #define EIP_sig(context) _UC_MACHINE_PC(context)
417 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
418 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
419
420 #define FPU_sig(context) NULL
421 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&((context)->uc_mcontext.__fpregs))
422
423 #define T_MCHK T_MCA
424 #define T_XMMFLT T_XMM
425
426 #elif defined(__GNU__)
427
428 #define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX])
429 #define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX])
430 #define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX])
431 #define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX])
432 #define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI])
433 #define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI])
434 #define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP])
435 #define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP])
436
437 #define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS])
438 #define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS])
439 #define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES])
440 #define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS])
441 #define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS])
442 #define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS])
443
444 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
445 #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
446 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
447 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
448
449 #define FPU_sig(context) ((FLOATING_SAVE_AREA *)&(context)->uc_mcontext.fpregs.fp_reg_set.fpchip_state)
450 #define FPUX_sig(context) NULL
451
452 #else
453 #error You must define the signal context functions for your platform
454 #endif /* linux */
455
456 WINE_DEFAULT_DEBUG_CHANNEL(seh);
457
458 typedef int (*wine_signal_handler)(unsigned int sig);
459
460 static const size_t teb_size = 4096; /* we reserve one page for the TEB */
461 static size_t signal_stack_mask;
462 static size_t signal_stack_size;
463
464 static wine_signal_handler handlers[256];
465
466 static BOOL fpux_support; /* whether the CPU supports extended fpu context */
467
468 extern void DECLSPEC_NORETURN __wine_restore_regs( const CONTEXT *context );
469
470 enum i386_trap_code
471 {
472 TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
473 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
474 TRAP_x86_DIVIDE = T_DIVIDE, /* Division by zero exception */
475 TRAP_x86_TRCTRAP = T_TRCTRAP, /* Single-step exception */
476 TRAP_x86_NMI = T_NMI, /* NMI interrupt */
477 TRAP_x86_BPTFLT = T_BPTFLT, /* Breakpoint exception */
478 TRAP_x86_OFLOW = T_OFLOW, /* Overflow exception */
479 TRAP_x86_BOUND = T_BOUND, /* Bound range exception */
480 TRAP_x86_PRIVINFLT = T_PRIVINFLT, /* Invalid opcode exception */
481 TRAP_x86_DNA = T_DNA, /* Device not available exception */
482 TRAP_x86_DOUBLEFLT = T_DOUBLEFLT, /* Double fault exception */
483 TRAP_x86_FPOPFLT = T_FPOPFLT, /* Coprocessor segment overrun */
484 TRAP_x86_TSSFLT = T_TSSFLT, /* Invalid TSS exception */
485 TRAP_x86_SEGNPFLT = T_SEGNPFLT, /* Segment not present exception */
486 TRAP_x86_STKFLT = T_STKFLT, /* Stack fault */
487 TRAP_x86_PROTFLT = T_PROTFLT, /* General protection fault */
488 TRAP_x86_PAGEFLT = T_PAGEFLT, /* Page fault */
489 TRAP_x86_ARITHTRAP = T_ARITHTRAP, /* Floating point exception */
490 TRAP_x86_ALIGNFLT = T_ALIGNFLT, /* Alignment check exception */
491 TRAP_x86_MCHK = T_MCHK, /* Machine check exception */
492 TRAP_x86_CACHEFLT = T_XMMFLT /* Cache flush exception */
493 #else
494 TRAP_x86_DIVIDE = 0, /* Division by zero exception */
495 TRAP_x86_TRCTRAP = 1, /* Single-step exception */
496 TRAP_x86_NMI = 2, /* NMI interrupt */
497 TRAP_x86_BPTFLT = 3, /* Breakpoint exception */
498 TRAP_x86_OFLOW = 4, /* Overflow exception */
499 TRAP_x86_BOUND = 5, /* Bound range exception */
500 TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */
501 TRAP_x86_DNA = 7, /* Device not available exception */
502 TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */
503 TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */
504 TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */
505 TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */
506 TRAP_x86_STKFLT = 12, /* Stack fault */
507 TRAP_x86_PROTFLT = 13, /* General protection fault */
508 TRAP_x86_PAGEFLT = 14, /* Page fault */
509 TRAP_x86_ARITHTRAP = 16, /* Floating point exception */
510 TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */
511 TRAP_x86_MCHK = 18, /* Machine check exception */
512 TRAP_x86_CACHEFLT = 19 /* SIMD exception (via SIGFPE) if CPU is SSE capable
513 otherwise Cache flush exception (via SIGSEV) */
514 #endif
515 };
516
517 /* Exception record for handling exceptions happening inside exception handlers */
518 typedef struct
519 {
520 EXCEPTION_REGISTRATION_RECORD frame;
521 EXCEPTION_REGISTRATION_RECORD *prevFrame;
522 } EXC_NESTED_FRAME;
523
524 extern DWORD EXC_CallHandler( EXCEPTION_RECORD *record, EXCEPTION_REGISTRATION_RECORD *frame,
525 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher,
526 PEXCEPTION_HANDLER handler, PEXCEPTION_HANDLER nested_handler );
527
528 /***********************************************************************
529 * dispatch_signal
530 */
531 static inline int dispatch_signal(unsigned int sig)
532 {
533 if (handlers[sig] == NULL) return 0;
534 return handlers[sig](sig);
535 }
536
537
538 /***********************************************************************
539 * get_trap_code
540 *
541 * Get the trap code for a signal.
542 */
543 static inline enum i386_trap_code get_trap_code( const ucontext_t *sigcontext )
544 {
545 #ifdef TRAP_sig
546 return TRAP_sig(sigcontext);
547 #else
548 return TRAP_x86_UNKNOWN; /* unknown trap code */
549 #endif
550 }
551
552 /***********************************************************************
553 * get_error_code
554 *
555 * Get the error code for a signal.
556 */
557 static inline WORD get_error_code( const ucontext_t *sigcontext )
558 {
559 #ifdef ERROR_sig
560 return ERROR_sig(sigcontext);
561 #else
562 return 0;
563 #endif
564 }
565
566 /***********************************************************************
567 * get_signal_stack
568 *
569 * Get the base of the signal stack for the current thread.
570 */
571 static inline void *get_signal_stack(void)
572 {
573 return (char *)NtCurrentTeb() + 4096;
574 }
575
576
577 /***********************************************************************
578 * get_current_teb
579 *
580 * Get the current teb based on the stack pointer.
581 */
582 static inline TEB *get_current_teb(void)
583 {
584 unsigned long esp;
585 __asm__("movl %%esp,%0" : "=g" (esp) );
586 return (TEB *)(esp & ~signal_stack_mask);
587 }
588
589
590 /*******************************************************************
591 * is_valid_frame
592 */
593 static inline BOOL is_valid_frame( void *frame )
594 {
595 if ((ULONG_PTR)frame & 3) return FALSE;
596 return (frame >= NtCurrentTeb()->Tib.StackLimit &&
597 (void **)frame < (void **)NtCurrentTeb()->Tib.StackBase - 1);
598 }
599
600 /*******************************************************************
601 * raise_handler
602 *
603 * Handler for exceptions happening inside a handler.
604 */
605 static DWORD raise_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
606 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
607 {
608 if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
609 return ExceptionContinueSearch;
610 /* We shouldn't get here so we store faulty frame in dispatcher */
611 *dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame;
612 return ExceptionNestedException;
613 }
614
615
616 /*******************************************************************
617 * unwind_handler
618 *
619 * Handler for exceptions happening inside an unwind handler.
620 */
621 static DWORD unwind_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
622 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
623 {
624 if (!(rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)))
625 return ExceptionContinueSearch;
626 /* We shouldn't get here so we store faulty frame in dispatcher */
627 *dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame;
628 return ExceptionCollidedUnwind;
629 }
630
631
632 /**********************************************************************
633 * call_stack_handlers
634 *
635 * Call the stack handlers chain.
636 */
637 static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *context )
638 {
639 EXCEPTION_REGISTRATION_RECORD *frame, *dispatch, *nested_frame;
640 DWORD res;
641
642 frame = NtCurrentTeb()->Tib.ExceptionList;
643 nested_frame = NULL;
644 while (frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL)
645 {
646 /* Check frame address */
647 if (!is_valid_frame( frame ))
648 {
649 rec->ExceptionFlags |= EH_STACK_INVALID;
650 break;
651 }
652
653 /* Call handler */
654 TRACE( "calling handler at %p code=%x flags=%x\n",
655 frame->Handler, rec->ExceptionCode, rec->ExceptionFlags );
656 res = EXC_CallHandler( rec, frame, context, &dispatch, frame->Handler, raise_handler );
657 TRACE( "handler at %p returned %x\n", frame->Handler, res );
658
659 if (frame == nested_frame)
660 {
661 /* no longer nested */
662 nested_frame = NULL;
663 rec->ExceptionFlags &= ~EH_NESTED_CALL;
664 }
665
666 switch(res)
667 {
668 case ExceptionContinueExecution:
669 if (!(rec->ExceptionFlags & EH_NONCONTINUABLE)) return STATUS_SUCCESS;
670 return STATUS_NONCONTINUABLE_EXCEPTION;
671 case ExceptionContinueSearch:
672 break;
673 case ExceptionNestedException:
674 if (nested_frame < dispatch) nested_frame = dispatch;
675 rec->ExceptionFlags |= EH_NESTED_CALL;
676 break;
677 default:
678 return STATUS_INVALID_DISPOSITION;
679 }
680 frame = frame->Prev;
681 }
682 return STATUS_UNHANDLED_EXCEPTION;
683 }
684
685
686 /*******************************************************************
687 * raise_exception
688 *
689 * Implementation of NtRaiseException.
690 */
691 static NTSTATUS raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
692 {
693 NTSTATUS status;
694
695 if (first_chance)
696 {
697 DWORD c;
698
699 TRACE( "code=%x flags=%x addr=%p ip=%08x tid=%04x\n",
700 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
701 context->Eip, GetCurrentThreadId() );
702 for (c = 0; c < rec->NumberParameters; c++)
703 TRACE( " info[%d]=%08lx\n", c, rec->ExceptionInformation[c] );
704 if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
705 {
706 if (rec->ExceptionInformation[1] >> 16)
707 MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
708 rec->ExceptionAddress,
709 (char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
710 else
711 MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
712 rec->ExceptionAddress,
713 (char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
714 }
715 else
716 {
717 TRACE(" eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n",
718 context->Eax, context->Ebx, context->Ecx,
719 context->Edx, context->Esi, context->Edi );
720 TRACE(" ebp=%08x esp=%08x cs=%04x ds=%04x es=%04x fs=%04x gs=%04x flags=%08x\n",
721 context->Ebp, context->Esp, context->SegCs, context->SegDs,
722 context->SegEs, context->SegFs, context->SegGs, context->EFlags );
723 }
724 status = send_debug_event( rec, TRUE, context );
725 if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
726 return STATUS_SUCCESS;
727
728 /* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
729 if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context->Eip--;
730
731 if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION)
732 return STATUS_SUCCESS;
733
734 if ((status = call_stack_handlers( rec, context )) != STATUS_UNHANDLED_EXCEPTION)
735 return status;
736 }
737
738 /* last chance exception */
739
740 status = send_debug_event( rec, FALSE, context );
741 if (status != DBG_CONTINUE)
742 {
743 if (rec->ExceptionFlags & EH_STACK_INVALID)
744 WINE_ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
745 else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
746 WINE_ERR("Process attempted to continue execution after noncontinuable exception.\n");
747 else
748 WINE_ERR("Unhandled exception code %x flags %x addr %p\n",
749 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
750 NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode );
751 }
752 return STATUS_SUCCESS;
753 }
754
755
756 #ifdef __HAVE_VM86
757 /***********************************************************************
758 * save_vm86_context
759 *
760 * Set the register values from a vm86 structure.
761 */
762 static void save_vm86_context( CONTEXT *context, const struct vm86plus_struct *vm86 )
763 {
764 context->ContextFlags = CONTEXT_FULL;
765 context->Eax = vm86->regs.eax;
766 context->Ebx = vm86->regs.ebx;
767 context->Ecx = vm86->regs.ecx;
768 context->Edx = vm86->regs.edx;
769 context->Esi = vm86->regs.esi;
770 context->Edi = vm86->regs.edi;
771 context->Esp = vm86->regs.esp;
772 context->Ebp = vm86->regs.ebp;
773 context->Eip = vm86->regs.eip;
774 context->SegCs = vm86->regs.cs;
775 context->SegDs = vm86->regs.ds;
776 context->SegEs = vm86->regs.es;
777 context->SegFs = vm86->regs.fs;
778 context->SegGs = vm86->regs.gs;
779 context->SegSs = vm86->regs.ss;
780 context->EFlags = vm86->regs.eflags;
781 }
782
783
784 /***********************************************************************
785 * restore_vm86_context
786 *
787 * Build a vm86 structure from the register values.
788 */
789 static void restore_vm86_context( const CONTEXT *context, struct vm86plus_struct *vm86 )
790 {
791 vm86->regs.eax = context->Eax;
792 vm86->regs.ebx = context->Ebx;
793 vm86->regs.ecx = context->Ecx;
794 vm86->regs.edx = context->Edx;
795 vm86->regs.esi = context->Esi;
796 vm86->regs.edi = context->Edi;
797 vm86->regs.esp = context->Esp;
798 vm86->regs.ebp = context->Ebp;
799 vm86->regs.eip = context->Eip;
800 vm86->regs.cs = context->SegCs;
801 vm86->regs.ds = context->SegDs;
802 vm86->regs.es = context->SegEs;
803 vm86->regs.fs = context->SegFs;
804 vm86->regs.gs = context->SegGs;
805 vm86->regs.ss = context->SegSs;
806 vm86->regs.eflags = context->EFlags;
807 }
808
809
810 /**********************************************************************
811 * merge_vm86_pending_flags
812 *
813 * Merges TEB.vm86_ptr and TEB.vm86_pending VIP flags and
814 * raises exception if there are pending events and VIF flag
815 * has been turned on.
816 *
817 * Called from __wine_enter_vm86 because vm86_enter
818 * doesn't check for pending events.
819 *
820 * Called from raise_vm86_sti_exception to check for
821 * pending events in a signal safe way.
822 */
823 static void merge_vm86_pending_flags( EXCEPTION_RECORD *rec )
824 {
825 BOOL check_pending = TRUE;
826 struct vm86plus_struct *vm86 =
827 (struct vm86plus_struct*)(ntdll_get_thread_data()->vm86_ptr);
828
829 /*
830 * In order to prevent a race when SIGUSR2 occurs while
831 * we are returning from exception handler, pending events
832 * will be rechecked after each raised exception.
833 */
834 while (check_pending && get_vm86_teb_info()->vm86_pending)
835 {
836 check_pending = FALSE;
837 ntdll_get_thread_data()->vm86_ptr = NULL;
838
839 /*
840 * If VIF is set, throw exception.
841 * Note that SIGUSR2 may turn VIF flag off so
842 * VIF check must occur only when TEB.vm86_ptr is NULL.
843 */
844 if (vm86->regs.eflags & VIF_FLAG)
845 {
846 CONTEXT vcontext;
847 save_vm86_context( &vcontext, vm86 );
848
849 rec->ExceptionCode = EXCEPTION_VM86_STI;
850 rec->ExceptionFlags = EXCEPTION_CONTINUABLE;
851 rec->ExceptionRecord = NULL;
852 rec->NumberParameters = 0;
853 rec->ExceptionAddress = (LPVOID)vcontext.Eip;
854
855 vcontext.EFlags &= ~VIP_FLAG;
856 get_vm86_teb_info()->vm86_pending = 0;
857 raise_exception( rec, &vcontext, TRUE );
858
859 restore_vm86_context( &vcontext, vm86 );
860 check_pending = TRUE;
861 }
862
863 ntdll_get_thread_data()->vm86_ptr = vm86;
864 }
865
866 /*
867 * Merge VIP flags in a signal safe way. This requires
868 * that the following operation compiles into atomic
869 * instruction.
870 */
871 vm86->regs.eflags |= get_vm86_teb_info()->vm86_pending;
872 }
873 #endif /* __HAVE_VM86 */
874
875
876 #ifdef __sun
877
878 /* We have to workaround two Solaris breakages:
879 * - Solaris doesn't restore %ds and %es before calling the signal handler so exceptions in 16-bit
880 * code crash badly.
881 * - Solaris inserts a libc trampoline to call our handler, but the trampoline expects that registers
882 * are setup correctly. So we need to insert our own trampoline below the libc trampoline to set %gs.
883 */
884
885 extern int sigaction_syscall( int sig, const struct sigaction *new, struct sigaction *old );
886 __ASM_GLOBAL_FUNC( sigaction_syscall,
887 "movl $0x62,%eax\n\t"
888 "int $0x91\n\t"
889 "ret" )
890
891 /* assume the same libc handler is used for all signals */
892 static void (*libc_sigacthandler)( int signal, siginfo_t *siginfo, void *context );
893
894 static void wine_sigacthandler( int signal, siginfo_t *siginfo, void *sigcontext )
895 {
896 struct ntdll_thread_data *thread_data;
897
898 __asm__ __volatile__("mov %ss,%ax; mov %ax,%ds; mov %ax,%es");
899
900 thread_data = (struct ntdll_thread_data *)get_current_teb()->SpareBytes1;
901 wine_set_fs( thread_data->fs );
902 wine_set_gs( thread_data->gs );
903
904 libc_sigacthandler( signal, siginfo, sigcontext );
905 }
906
907 static int solaris_sigaction( int sig, const struct sigaction *new, struct sigaction *old )
908 {
909 struct sigaction real_act;
910
911 if (sigaction( sig, new, old ) == -1) return -1;
912
913 /* retrieve the real handler and flags with a direct syscall */
914 sigaction_syscall( sig, NULL, &real_act );
915 libc_sigacthandler = real_act.sa_sigaction;
916 real_act.sa_sigaction = wine_sigacthandler;
917 sigaction_syscall( sig, &real_act, NULL );
918 return 0;
919 }
920 #define sigaction(sig,new,old) solaris_sigaction(sig,new,old)
921
922 #endif
923
924 typedef void (WINAPI *raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context );
925
926 extern void clear_alignment_flag(void);
927 __ASM_GLOBAL_FUNC( clear_alignment_flag,
928 "pushfl\n\t"
929 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
930 "andl $~0x40000,(%esp)\n\t"
931 "popfl\n\t"
932 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
933 "ret" )
934
935
936 /***********************************************************************
937 * init_handler
938 *
939 * Handler initialization when the full context is not needed.
940 * Return the stack pointer to use for pushing the exception data.
941 */
942 static inline void *init_handler( const ucontext_t *sigcontext, WORD *fs, WORD *gs )
943 {
944 TEB *teb = get_current_teb();
945
946 clear_alignment_flag();
947
948 /* get %fs and %gs at time of the fault */
949 #ifdef FS_sig
950 *fs = LOWORD(FS_sig(sigcontext));
951 #else
952 *fs = wine_get_fs();
953 #endif
954 #ifdef GS_sig
955 *gs = LOWORD(GS_sig(sigcontext));
956 #else
957 *gs = wine_get_gs();
958 #endif
959
960 #ifndef __sun /* see above for Solaris handling */
961 {
962 struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)teb->SpareBytes1;
963 wine_set_fs( thread_data->fs );
964 wine_set_gs( thread_data->gs );
965 }
966 #endif
967
968 if (!wine_ldt_is_system(CS_sig(sigcontext)) ||
969 !wine_ldt_is_system(SS_sig(sigcontext))) /* 16-bit mode */
970 {
971 /*
972 * Win16 or DOS protected mode. Note that during switch
973 * from 16-bit mode to linear mode, CS may be set to system
974 * segment before FS is restored. Fortunately, in this case
975 * SS is still non-system segment. This is why both CS and SS
976 * are checked.
977 */
978 return teb->WOW32Reserved;
979 }
980 return (void *)(ESP_sig(sigcontext) & ~3);
981 }
982
983
984 /***********************************************************************
985 * save_fpu
986 *
987 * Save the thread FPU context.
988 */
989 static inline void save_fpu( CONTEXT *context )
990 {
991 #ifdef __GNUC__
992 context->ContextFlags |= CONTEXT_FLOATING_POINT;
993 __asm__ __volatile__( "fnsave %0; fwait" : "=m" (context->FloatSave) );
994 #endif
995 }
996
997
998 /***********************************************************************
999 * save_fpux
1000 *
1001 * Save the thread FPU extended context.
1002 */
1003 static inline void save_fpux( CONTEXT *context )
1004 {
1005 #ifdef __GNUC__
1006 /* we have to enforce alignment by hand */
1007 char buffer[sizeof(XMM_SAVE_AREA32) + 16];
1008 XMM_SAVE_AREA32 *state = (XMM_SAVE_AREA32 *)(((ULONG_PTR)buffer + 15) & ~15);
1009
1010 __asm__ __volatile__( "fxsave %0" : "=m" (*state) );
1011 context->ContextFlags |= CONTEXT_EXTENDED_REGISTERS;
1012 memcpy( context->ExtendedRegisters, state, sizeof(*state) );
1013 #endif
1014 }
1015
1016
1017 /***********************************************************************
1018 * restore_fpu
1019 *
1020 * Restore the FPU context to a sigcontext.
1021 */
1022 static inline void restore_fpu( const CONTEXT *context )
1023 {
1024 FLOATING_SAVE_AREA float_status = context->FloatSave;
1025 /* reset the current interrupt status */
1026 float_status.StatusWord &= float_status.ControlWord | 0xffffff80;
1027 #ifdef __GNUC__
1028 __asm__ __volatile__( "frstor %0; fwait" : : "m" (float_status) );
1029 #endif /* __GNUC__ */
1030 }
1031
1032
1033 /***********************************************************************
1034 * restore_fpux
1035 *
1036 * Restore the FPU extended context to a sigcontext.
1037 */
1038 static inline void restore_fpux( const CONTEXT *context )
1039 {
1040 #ifdef __GNUC__
1041 /* we have to enforce alignment by hand */
1042 char buffer[sizeof(XMM_SAVE_AREA32) + 16];
1043 XMM_SAVE_AREA32 *state = (XMM_SAVE_AREA32 *)(((ULONG_PTR)buffer + 15) & ~15);
1044
1045 memcpy( state, context->ExtendedRegisters, sizeof(*state) );
1046 /* reset the current interrupt status */
1047 state->StatusWord &= state->ControlWord | 0xff80;
1048 __asm__ __volatile__( "fxrstor %0" : : "m" (*state) );
1049 #endif
1050 }
1051
1052
1053 /***********************************************************************
1054 * fpux_to_fpu
1055 *
1056 * Build a standard FPU context from an extended one.
1057 */
1058 static void fpux_to_fpu( FLOATING_SAVE_AREA *fpu, const XMM_SAVE_AREA32 *fpux )
1059 {
1060 unsigned int i, tag, stack_top;
1061
1062 fpu->ControlWord = fpux->ControlWord | 0xffff0000;
1063 fpu->StatusWord = fpux->StatusWord | 0xffff0000;
1064 fpu->ErrorOffset = fpux->ErrorOffset;
1065 fpu->ErrorSelector = fpux->ErrorSelector | (fpux->ErrorOpcode << 16);
1066 fpu->DataOffset = fpux->DataOffset;
1067 fpu->DataSelector = fpux->DataSelector;
1068 fpu->Cr0NpxState = fpux->StatusWord | 0xffff0000;
1069
1070 stack_top = (fpux->StatusWord >> 11) & 7;
1071 fpu->TagWord = 0xffff0000;
1072 for (i = 0; i < 8; i++)
1073 {
1074 memcpy( &fpu->RegisterArea[10 * i], &fpux->FloatRegisters[i], 10 );
1075 if (!(fpux->TagWord & (1 << i))) tag = 3; /* empty */
1076 else
1077 {
1078 const M128A *reg = &fpux->FloatRegisters[(i - stack_top) & 7];
1079 if ((reg->High & 0x7fff) == 0x7fff) /* exponent all ones */
1080 {
1081 tag = 2; /* special */
1082 }
1083 else if (!(reg->High & 0x7fff)) /* exponent all zeroes */
1084 {
1085 if (reg->Low) tag = 2; /* special */
1086 else tag = 1; /* zero */
1087 }
1088 else
1089 {
1090 if (reg->Low >> 63) tag = 0; /* valid */
1091 else tag = 2; /* special */
1092 }
1093 }
1094 fpu->TagWord |= tag << (2 * i);
1095 }
1096 }
1097
1098
1099 /***********************************************************************
1100 * save_context
1101 *
1102 * Build a context structure from the signal info.
1103 */
1104 static inline void save_context( CONTEXT *context, const ucontext_t *sigcontext, WORD fs, WORD gs )
1105 {
1106 struct ntdll_thread_data * const regs = ntdll_get_thread_data();
1107 FLOATING_SAVE_AREA *fpu = FPU_sig(sigcontext);
1108 XMM_SAVE_AREA32 *fpux = FPUX_sig(sigcontext);
1109
1110 memset(context, 0, sizeof(*context));
1111 context->ContextFlags = CONTEXT_FULL | CONTEXT_DEBUG_REGISTERS;
1112 context->Eax = EAX_sig(sigcontext);
1113 context->Ebx = EBX_sig(sigcontext);
1114 context->Ecx = ECX_sig(sigcontext);
1115 context->Edx = EDX_sig(sigcontext);
1116 context->Esi = ESI_sig(sigcontext);
1117 context->Edi = EDI_sig(sigcontext);
1118 context->Ebp = EBP_sig(sigcontext);
1119 context->EFlags = EFL_sig(sigcontext);
1120 context->Eip = EIP_sig(sigcontext);
1121 context->Esp = ESP_sig(sigcontext);
1122 context->SegCs = LOWORD(CS_sig(sigcontext));
1123 context->SegDs = LOWORD(DS_sig(sigcontext));
1124 context->SegEs = LOWORD(ES_sig(sigcontext));
1125 context->SegFs = fs;
1126 context->SegGs = gs;
1127 context->SegSs = LOWORD(SS_sig(sigcontext));
1128 context->Dr0 = regs->dr0;
1129 context->Dr1 = regs->dr1;
1130 context->Dr2 = regs->dr2;
1131 context->Dr3 = regs->dr3;
1132 context->Dr6 = regs->dr6;
1133 context->Dr7 = regs->dr7;
1134
1135 if (fpu)
1136 {
1137 context->ContextFlags |= CONTEXT_FLOATING_POINT;
1138 context->FloatSave = *fpu;
1139 }
1140 if (fpux)
1141 {
1142 context->ContextFlags |= CONTEXT_FLOATING_POINT | CONTEXT_EXTENDED_REGISTERS;
1143 memcpy( context->ExtendedRegisters, fpux, sizeof(*fpux) );
1144 fpux_support = TRUE;
1145 if (!fpu) fpux_to_fpu( &context->FloatSave, fpux );
1146 }
1147 if (!fpu && !fpux) save_fpu( context );
1148 }
1149
1150
1151 /***********************************************************************
1152 * restore_context
1153 *
1154 * Restore the signal info from the context.
1155 */
1156 static inline void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
1157 {
1158 struct ntdll_thread_data * const regs = ntdll_get_thread_data();
1159 FLOATING_SAVE_AREA *fpu = FPU_sig(sigcontext);
1160 XMM_SAVE_AREA32 *fpux = FPUX_sig(sigcontext);
1161
1162 regs->dr0 = context->Dr0;
1163 regs->dr1 = context->Dr1;
1164 regs->dr2 = context->Dr2;
1165 regs->dr3 = context->Dr3;
1166 regs->dr6 = context->Dr6;
1167 regs->dr7 = context->Dr7;
1168 EAX_sig(sigcontext) = context->Eax;
1169 EBX_sig(sigcontext) = context->Ebx;
1170 ECX_sig(sigcontext) = context->Ecx;
1171 EDX_sig(sigcontext) = context->Edx;
1172 ESI_sig(sigcontext) = context->Esi;
1173 EDI_sig(sigcontext) = context->Edi;
1174 EBP_sig(sigcontext) = context->Ebp;
1175 EFL_sig(sigcontext) = context->EFlags;
1176 EIP_sig(sigcontext) = context->Eip;
1177 ESP_sig(sigcontext) = context->Esp;
1178 CS_sig(sigcontext) = context->SegCs;
1179 DS_sig(sigcontext) = context->SegDs;
1180 ES_sig(sigcontext) = context->SegEs;
1181 SS_sig(sigcontext) = context->SegSs;
1182 #ifdef GS_sig
1183 GS_sig(sigcontext) = context->SegGs;
1184 #else
1185 wine_set_gs( context->SegGs );
1186 #endif
1187 #ifdef FS_sig
1188 FS_sig(sigcontext) = context->SegFs;
1189 #else
1190 wine_set_fs( context->SegFs );
1191 #endif
1192
1193 if (fpu) *fpu = context->FloatSave;
1194 if (fpux) memcpy( fpux, context->ExtendedRegisters, sizeof(*fpux) );
1195 if (!fpu && !fpux) restore_fpu( context );
1196 }
1197
1198
1199 /***********************************************************************
1200 * RtlCaptureContext (NTDLL.@)
1201 */
1202 __ASM_STDCALL_FUNC( RtlCaptureContext, 4,
1203 "pushl %eax\n\t"
1204 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
1205 "movl 8(%esp),%eax\n\t" /* context */
1206 "movl $0x10007,(%eax)\n\t" /* context->ContextFlags */
1207 "movw %gs,0x8c(%eax)\n\t" /* context->SegGs */
1208 "movw %fs,0x90(%eax)\n\t" /* context->SegFs */
1209 "movw %es,0x94(%eax)\n\t" /* context->SegEs */
1210 "movw %ds,0x98(%eax)\n\t" /* context->SegDs */
1211 "movl %edi,0x9c(%eax)\n\t" /* context->Edi */
1212 "movl %esi,0xa0(%eax)\n\t" /* context->Esi */
1213 "movl %ebx,0xa4(%eax)\n\t" /* context->Ebx */
1214 "movl %edx,0xa8(%eax)\n\t" /* context->Edx */
1215 "movl %ecx,0xac(%eax)\n\t" /* context->Ecx */
1216 "movl %ebp,0xb4(%eax)\n\t" /* context->Ebp */
1217 "movl 4(%esp),%edx\n\t"
1218 "movl %edx,0xb8(%eax)\n\t" /* context->Eip */
1219 "movw %cs,0xbc(%eax)\n\t" /* context->SegCs */
1220 "pushfl\n\t"
1221 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
1222 "popl 0xc0(%eax)\n\t" /* context->EFlags */
1223 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
1224 "leal 8(%esp),%edx\n\t"
1225 "movl %edx,0xc4(%eax)\n\t" /* context->Esp */
1226 "movw %ss,0xc8(%eax)\n\t" /* context->SegSs */
1227 "popl 0xb0(%eax)\n\t" /* context->Eax */
1228 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
1229 "ret $4" )
1230
1231
1232 /***********************************************************************
1233 * set_cpu_context
1234 *
1235 * Set the new CPU context. Used by NtSetContextThread.
1236 */
1237 void set_cpu_context( const CONTEXT *context )
1238 {
1239 DWORD flags = context->ContextFlags & ~CONTEXT_i386;
1240
1241 if ((flags & CONTEXT_EXTENDED_REGISTERS) && fpux_support) restore_fpux( context );
1242 else if (flags & CONTEXT_FLOATING_POINT) restore_fpu( context );
1243
1244 if (flags & CONTEXT_DEBUG_REGISTERS)
1245 {
1246 ntdll_get_thread_data()->dr0 = context->Dr0;
1247 ntdll_get_thread_data()->dr1 = context->Dr1;
1248 ntdll_get_thread_data()->dr2 = context->Dr2;
1249 ntdll_get_thread_data()->dr3 = context->Dr3;
1250 ntdll_get_thread_data()->dr6 = context->Dr6;
1251 ntdll_get_thread_data()->dr7 = context->Dr7;
1252 }
1253 if (flags & CONTEXT_FULL)
1254 {
1255 if (!(flags & CONTEXT_CONTROL))
1256 FIXME( "setting partial context (%x) not supported\n", flags );
1257 else if (flags & CONTEXT_SEGMENTS)
1258 __wine_restore_regs( context );
1259 else
1260 {
1261 CONTEXT newcontext = *context;
1262 newcontext.SegDs = wine_get_ds();
1263 newcontext.SegEs = wine_get_es();
1264 newcontext.SegFs = wine_get_fs();
1265 newcontext.SegGs = wine_get_gs();
1266 __wine_restore_regs( &newcontext );
1267 }
1268 }
1269 }
1270
1271
1272 /***********************************************************************
1273 * set_debug_registers
1274 */
1275 static void set_debug_registers( const CONTEXT *context )
1276 {
1277 DWORD flags = context->ContextFlags & ~CONTEXT_i386;
1278 context_t server_context;
1279
1280 if (!(flags & CONTEXT_DEBUG_REGISTERS)) return;
1281 if (ntdll_get_thread_data()->dr0 == context->Dr0 &&
1282 ntdll_get_thread_data()->dr1 == context->Dr1 &&
1283 ntdll_get_thread_data()->dr2 == context->Dr2 &&
1284 ntdll_get_thread_data()->dr3 == context->Dr3 &&
1285 ntdll_get_thread_data()->dr6 == context->Dr6 &&
1286 ntdll_get_thread_data()->dr7 == context->Dr7) return;
1287
1288 context_to_server( &server_context, context );
1289
1290 SERVER_START_REQ( set_thread_context )
1291 {
1292 req->handle = wine_server_obj_handle( GetCurrentThread() );
1293 req->suspend = 0;
1294 wine_server_add_data( req, &server_context, sizeof(server_context) );
1295 wine_server_call( req );
1296 }
1297 SERVER_END_REQ;
1298 }
1299
1300
1301 /***********************************************************************
1302 * copy_context
1303 *
1304 * Copy a register context according to the flags.
1305 */
1306 void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags )
1307 {
1308 flags &= ~CONTEXT_i386; /* get rid of CPU id */
1309 if (flags & CONTEXT_INTEGER)
1310 {
1311 to->Eax = from->Eax;
1312 to->Ebx = from->Ebx;
1313 to->Ecx = from->Ecx;
1314 to->Edx = from->Edx;
1315 to->Esi = from->Esi;
1316 to->Edi = from->Edi;
1317 }
1318 if (flags & CONTEXT_CONTROL)
1319 {
1320 to->Ebp = from->Ebp;
1321 to->Esp = from->Esp;
1322 to->Eip = from->Eip;
1323 to->SegCs = from->SegCs;
1324 to->SegSs = from->SegSs;
1325 to->EFlags = from->EFlags;
1326 }
1327 if (flags & CONTEXT_SEGMENTS)
1328 {
1329 to->SegDs = from->SegDs;
1330 to->SegEs = from->SegEs;
1331 to->SegFs = from->SegFs;
1332 to->SegGs = from->SegGs;
1333 }
1334 if (flags & CONTEXT_DEBUG_REGISTERS)
1335 {
1336 to->Dr0 = from->Dr0;
1337 to->Dr1 = from->Dr1;
1338 to->Dr2 = from->Dr2;
1339 to->Dr3 = from->Dr3;
1340 to->Dr6 = from->Dr6;
1341 to->Dr7 = from->Dr7;
1342 }
1343 if (flags & CONTEXT_FLOATING_POINT)
1344 {
1345 to->FloatSave = from->FloatSave;
1346 }
1347 if (flags & CONTEXT_EXTENDED_REGISTERS)
1348 {
1349 memcpy( to->ExtendedRegisters, from->ExtendedRegisters, sizeof(to->ExtendedRegisters) );
1350 }
1351 }
1352
1353
1354 /***********************************************************************
1355 * context_to_server
1356 *
1357 * Convert a register context to the server format.
1358 */
1359 NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
1360 {
1361 DWORD flags = from->ContextFlags & ~CONTEXT_i386; /* get rid of CPU id */
1362
1363 memset( to, 0, sizeof(*to) );
1364 to->cpu = CPU_x86;
1365
1366 if (flags & CONTEXT_CONTROL)
1367 {
1368 to->flags |= SERVER_CTX_CONTROL;
1369 to->ctl.i386_regs.ebp = from->Ebp;
1370 to->ctl.i386_regs.esp = from->Esp;
1371 to->ctl.i386_regs.eip = from->Eip;
1372 to->ctl.i386_regs.cs = from->SegCs;
1373 to->ctl.i386_regs.ss = from->SegSs;
1374 to->ctl.i386_regs.eflags = from->EFlags;
1375 }
1376 if (flags & CONTEXT_INTEGER)
1377 {
1378 to->flags |= SERVER_CTX_INTEGER;
1379 to->integer.i386_regs.eax = from->Eax;
1380 to->integer.i386_regs.ebx = from->Ebx;
1381 to->integer.i386_regs.ecx = from->Ecx;
1382 to->integer.i386_regs.edx = from->Edx;
1383 to->integer.i386_regs.esi = from->Esi;
1384 to->integer.i386_regs.edi = from->Edi;
1385 }
1386 if (flags & CONTEXT_SEGMENTS)
1387 {
1388 to->flags |= SERVER_CTX_SEGMENTS;
1389 to->seg.i386_regs.ds = from->SegDs;
1390 to->seg.i386_regs.es = from->SegEs;
1391 to->seg.i386_regs.fs = from->SegFs;
1392 to->seg.i386_regs.gs = from->SegGs;
1393 }
1394 if (flags & CONTEXT_FLOATING_POINT)
1395 {
1396 to->flags |= SERVER_CTX_FLOATING_POINT;
1397 to->fp.i386_regs.ctrl = from->FloatSave.ControlWord;
1398 to->fp.i386_regs.status = from->FloatSave.StatusWord;
1399 to->fp.i386_regs.tag = from->FloatSave.TagWord;
1400 to->fp.i386_regs.err_off = from->FloatSave.ErrorOffset;
1401 to->fp.i386_regs.err_sel = from->FloatSave.ErrorSelector;
1402 to->fp.i386_regs.data_off = from->FloatSave.DataOffset;
1403 to->fp.i386_regs.data_sel = from->FloatSave.DataSelector;
1404 to->fp.i386_regs.cr0npx = from->FloatSave.Cr0NpxState;
1405 memcpy( to->fp.i386_regs.regs, from->FloatSave.RegisterArea, sizeof(to->fp.i386_regs.regs) );
1406 }
1407 if (flags & CONTEXT_DEBUG_REGISTERS)
1408 {
1409 to->flags |= SERVER_CTX_DEBUG_REGISTERS;
1410 to->debug.i386_regs.dr0 = from->Dr0;
1411 to->debug.i386_regs.dr1 = from->Dr1;
1412 to->debug.i386_regs.dr2 = from->Dr2;
1413 to->debug.i386_regs.dr3 = from->Dr3;
1414 to->debug.i386_regs.dr6 = from->Dr6;
1415 to->debug.i386_regs.dr7 = from->Dr7;
1416 }
1417 if (flags & CONTEXT_EXTENDED_REGISTERS)
1418 {
1419 to->flags |= SERVER_CTX_EXTENDED_REGISTERS;
1420 memcpy( to->ext.i386_regs, from->ExtendedRegisters, sizeof(to->ext.i386_regs) );
1421 }
1422 return STATUS_SUCCESS;
1423 }
1424
1425
1426 /***********************************************************************
1427 * context_from_server
1428 *
1429 * Convert a register context from the server format.
1430 */
1431 NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
1432 {
1433 if (from->cpu != CPU_x86) return STATUS_INVALID_PARAMETER;
1434
1435 to->ContextFlags = CONTEXT_i386;
1436 if (from->flags & SERVER_CTX_CONTROL)
1437 {
1438 to->ContextFlags |= CONTEXT_CONTROL;
1439 to->Ebp = from->ctl.i386_regs.ebp;
1440 to->Esp = from->ctl.i386_regs.esp;
1441 to->Eip = from->ctl.i386_regs.eip;
1442 to->SegCs = from->ctl.i386_regs.cs;
1443 to->SegSs = from->ctl.i386_regs.ss;
1444 to->EFlags = from->ctl.i386_regs.eflags;
1445 }
1446 if (from->flags & SERVER_CTX_INTEGER)
1447 {
1448 to->ContextFlags |= CONTEXT_INTEGER;
1449 to->Eax = from->integer.i386_regs.eax;
1450 to->Ebx = from->integer.i386_regs.ebx;
1451 to->Ecx = from->integer.i386_regs.ecx;
1452 to->Edx = from->integer.i386_regs.edx;
1453 to->Esi = from->integer.i386_regs.esi;
1454 to->Edi = from->integer.i386_regs.edi;
1455 }
1456 if (from->flags & SERVER_CTX_SEGMENTS)
1457 {
1458 to->ContextFlags |= CONTEXT_SEGMENTS;
1459 to->SegDs = from->seg.i386_regs.ds;
1460 to->SegEs = from->seg.i386_regs.es;
1461 to->SegFs = from->seg.i386_regs.fs;
1462 to->SegGs = from->seg.i386_regs.gs;
1463 }
1464 if (from->flags & SERVER_CTX_FLOATING_POINT)
1465 {
1466 to->ContextFlags |= CONTEXT_FLOATING_POINT;
1467 to->FloatSave.ControlWord = from->fp.i386_regs.ctrl;
1468 to->FloatSave.StatusWord = from->fp.i386_regs.status;
1469 to->FloatSave.TagWord = from->fp.i386_regs.tag;
1470 to->FloatSave.ErrorOffset = from->fp.i386_regs.err_off;
1471 to->FloatSave.ErrorSelector = from->fp.i386_regs.err_sel;
1472 to->FloatSave.DataOffset = from->fp.i386_regs.data_off;
1473 to->FloatSave.DataSelector = from->fp.i386_regs.data_sel;
1474 to->FloatSave.Cr0NpxState = from->fp.i386_regs.cr0npx;
1475 memcpy( to->FloatSave.RegisterArea, from->fp.i386_regs.regs, sizeof(to->FloatSave.RegisterArea) );
1476 }
1477 if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
1478 {
1479 to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
1480 to->Dr0 = from->debug.i386_regs.dr0;
1481 to->Dr1 = from->debug.i386_regs.dr1;
1482 to->Dr2 = from->debug.i386_regs.dr2;
1483 to->Dr3 = from->debug.i386_regs.dr3;
1484 to->Dr6 = from->debug.i386_regs.dr6;
1485 to->Dr7 = from->debug.i386_regs.dr7;
1486 }
1487 if (from->flags & SERVER_CTX_EXTENDED_REGISTERS)
1488 {
1489 to->ContextFlags |= CONTEXT_EXTENDED_REGISTERS;
1490 memcpy( to->ExtendedRegisters, from->ext.i386_regs, sizeof(to->ExtendedRegisters) );
1491 }
1492 return STATUS_SUCCESS;
1493 }
1494
1495
1496 /***********************************************************************
1497 * is_privileged_instr
1498 *
1499 * Check if the fault location is a privileged instruction.
1500 * Based on the instruction emulation code in dlls/kernel/instr.c.
1501 */
1502 static inline DWORD is_privileged_instr( CONTEXT *context )
1503 {
1504 const BYTE *instr;
1505 unsigned int prefix_count = 0;
1506
1507 if (!wine_ldt_is_system( context->SegCs )) return 0;
1508 instr = (BYTE *)context->Eip;
1509
1510 for (;;) switch(*instr)
1511 {
1512 /* instruction prefixes */
1513 case 0x2e: /* %cs: */
1514 case 0x36: /* %ss: */
1515 case 0x3e: /* %ds: */
1516 case 0x26: /* %es: */
1517 case 0x64: /* %fs: */
1518 case 0x65: /* %gs: */
1519 case 0x66: /* opcode size */
1520 case 0x67: /* addr size */
1521 case 0xf0: /* lock */
1522 case 0xf2: /* repne */
1523 case 0xf3: /* repe */
1524 if (++prefix_count >= 15) return EXCEPTION_ILLEGAL_INSTRUCTION;
1525 instr++;
1526 continue;
1527
1528 case 0x0f: /* extended instruction */
1529 switch(instr[1])
1530 {
1531 case 0x20: /* mov crX, reg */
1532 case 0x21: /* mov drX, reg */
1533 case 0x22: /* mov reg, crX */
1534 case 0x23: /* mov reg drX */
1535 return EXCEPTION_PRIV_INSTRUCTION;
1536 }
1537 return 0;
1538 case 0x6c: /* insb (%dx) */
1539 case 0x6d: /* insl (%dx) */
1540 case 0x6e: /* outsb (%dx) */
1541 case 0x6f: /* outsl (%dx) */
1542 case 0xcd: /* int $xx */
1543 case 0xe4: /* inb al,XX */
1544 case 0xe5: /* in (e)ax,XX */
1545 case 0xe6: /* outb XX,al */
1546 case 0xe7: /* out XX,(e)ax */
1547 case 0xec: /* inb (%dx),%al */
1548 case 0xed: /* inl (%dx),%eax */
1549 case 0xee: /* outb %al,(%dx) */
1550 case 0xef: /* outl %eax,(%dx) */
1551 case 0xf4: /* hlt */
1552 case 0xfa: /* cli */
1553 case 0xfb: /* sti */
1554 return EXCEPTION_PRIV_INSTRUCTION;
1555 default:
1556 return 0;
1557 }
1558 }
1559
1560 /***********************************************************************
1561 * check_invalid_gs
1562 *
1563 * Check for fault caused by invalid %gs value (some copy protection schemes mess with it).
1564 */
1565 static inline BOOL check_invalid_gs( CONTEXT *context )
1566 {
1567 unsigned int prefix_count = 0;
1568 const BYTE *instr = (BYTE *)context->Eip;
1569 WORD system_gs = ntdll_get_thread_data()->gs;
1570
1571 if (context->SegGs == system_gs) return FALSE;
1572 if (!wine_ldt_is_system( context->SegCs )) return FALSE;
1573 /* only handle faults in system libraries */
1574 if (virtual_is_valid_code_address( instr, 1 )) return FALSE;
1575
1576 for (;;) switch(*instr)
1577 {
1578 /* instruction prefixes */
1579 case 0x2e: /* %cs: */
1580 case 0x36: /* %ss: */
1581 case 0x3e: /* %ds: */
1582 case 0x26: /* %es: */
1583 case 0x64: /* %fs: */
1584 case 0x66: /* opcode size */
1585 case 0x67: /* addr size */
1586 case 0xf0: /* lock */
1587 case 0xf2: /* repne */
1588 case 0xf3: /* repe */
1589 if (++prefix_count >= 15) return FALSE;
1590 instr++;
1591 continue;
1592 case 0x65: /* %gs: */
1593 TRACE( "%04x/%04x at %p, fixing up\n", context->SegGs, system_gs, instr );
1594 context->SegGs = system_gs;
1595 return TRUE;
1596 default:
1597 return FALSE;
1598 }
1599 }
1600
1601
1602 #include "pshpack1.h"
1603 struct atl_thunk
1604 {
1605 DWORD movl; /* movl this,4(%esp) */
1606 DWORD this;
1607 BYTE jmp; /* jmp func */
1608 int func;
1609 };
1610 #include "poppack.h"
1611
1612 /**********************************************************************
1613 * check_atl_thunk
1614 *
1615 * Check if code destination is an ATL thunk, and emulate it if so.
1616 */
1617 static BOOL check_atl_thunk( EXCEPTION_RECORD *rec, CONTEXT *context )
1618 {
1619 const struct atl_thunk *thunk = (const struct atl_thunk *)rec->ExceptionInformation[1];
1620 BOOL ret = FALSE;
1621
1622 if (!virtual_is_valid_code_address( thunk, sizeof(*thunk) )) return FALSE;
1623
1624 __TRY
1625 {
1626 if (thunk->movl == 0x042444c7 && thunk->jmp == 0xe9)
1627 {
1628 *((DWORD *)context->Esp + 1) = thunk->this;
1629 context->Eip = (DWORD_PTR)(&thunk->func + 1) + thunk->func;
1630 TRACE( "emulating ATL thunk at %p, func=%08x arg=%08x\n",
1631 thunk, context->Eip, *((DWORD *)context->Esp + 1) );
1632 ret = TRUE;
1633 }
1634 }
1635 __EXCEPT_PAGE_FAULT
1636 {
1637 return FALSE;
1638 }
1639 __ENDTRY
1640 return ret;
1641 }
1642
1643
1644 /***********************************************************************
1645 * setup_exception_record
1646 *
1647 * Setup the exception record and context on the thread stack.
1648 */
1649 static EXCEPTION_RECORD *setup_exception_record( ucontext_t *sigcontext, void *stack_ptr,
1650 WORD fs, WORD gs, raise_func func )
1651 {
1652 struct stack_layout
1653 {
1654 void *ret_addr; /* return address from raise_func */
1655 EXCEPTION_RECORD *rec_ptr; /* first arg for raise_func */
1656 CONTEXT *context_ptr; /* second arg for raise_func */
1657 CONTEXT context;
1658 EXCEPTION_RECORD rec;
1659 DWORD ebp;
1660 DWORD eip;
1661 } *stack = stack_ptr;
1662 DWORD exception_code = 0;
1663
1664 /* stack sanity checks */
1665
1666 if ((char *)stack >= (char *)get_signal_stack() &&
1667 (char *)stack < (char *)get_signal_stack() + signal_stack_size)
1668 {
1669 WINE_ERR( "nested exception on signal stack in thread %04x eip %08x esp %08x stack %p-%p\n",
1670 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1671 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit,
1672 NtCurrentTeb()->Tib.StackBase );
1673 abort_thread(1);
1674 }
1675
1676 if (stack - 1 > stack || /* check for overflow in subtraction */
1677 (char *)stack <= (char *)NtCurrentTeb()->DeallocationStack ||
1678 (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase)
1679 {
1680 WARN( "exception outside of stack limits in thread %04x eip %08x esp %08x stack %p-%p\n",
1681 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1682 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit,
1683 NtCurrentTeb()->Tib.StackBase );
1684 }
1685 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->DeallocationStack + 4096)
1686 {
1687 /* stack overflow on last page, unrecoverable */
1688 UINT diff = (char *)NtCurrentTeb()->DeallocationStack + 4096 - (char *)(stack - 1);
1689 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1690 diff, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1691 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1692 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1693 abort_thread(1);
1694 }
1695 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit)
1696 {
1697 /* stack access below stack limit, may be recoverable */
1698 if (virtual_handle_stack_fault( stack - 1 )) exception_code = EXCEPTION_STACK_OVERFLOW;
1699 else
1700 {
1701 UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)(stack - 1);
1702 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1703 diff, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1704 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1705 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1706 abort_thread(1);
1707 }
1708 }
1709
1710 stack--; /* push the stack_layout structure */
1711 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
1712 VALGRIND_MAKE_MEM_UNDEFINED(stack, sizeof(*stack));
1713 #elif defined(VALGRIND_MAKE_WRITABLE)
1714 VALGRIND_MAKE_WRITABLE(stack, sizeof(*stack));
1715 #endif
1716 stack->ret_addr = (void *)0xdeadbabe; /* raise_func must not return */
1717 stack->rec_ptr = &stack->rec;
1718 stack->context_ptr = &stack->context;
1719
1720 stack->rec.ExceptionRecord = NULL;
1721 stack->rec.ExceptionCode = exception_code;
1722 stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
1723 stack->rec.ExceptionAddress = (LPVOID)EIP_sig(sigcontext);
1724 stack->rec.NumberParameters = 0;
1725
1726 save_context( &stack->context, sigcontext, fs, gs );
1727
1728 /* now modify the sigcontext to return to the raise function */
1729 ESP_sig(sigcontext) = (DWORD)stack;
1730 EIP_sig(sigcontext) = (DWORD)func;
1731 /* clear single-step, direction, and align check flag */
1732 EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000);
1733 CS_sig(sigcontext) = wine_get_cs();
1734 DS_sig(sigcontext) = wine_get_ds();
1735 ES_sig(sigcontext) = wine_get_es();
1736 FS_sig(sigcontext) = wine_get_fs();
1737 GS_sig(sigcontext) = wine_get_gs();
1738 SS_sig(sigcontext) = wine_get_ss();
1739
1740 return stack->rec_ptr;
1741 }
1742
1743
1744 /***********************************************************************
1745 * setup_exception
1746 *
1747 * Setup a proper stack frame for the raise function, and modify the
1748 * sigcontext so that the return from the signal handler will call
1749 * the raise function.
1750 */
1751 static EXCEPTION_RECORD *setup_exception( ucontext_t *sigcontext, raise_func func )
1752 {
1753 WORD fs, gs;
1754 void *stack = init_handler( sigcontext, &fs, &gs );
1755
1756 return setup_exception_record( sigcontext, stack, fs, gs, func );
1757 }
1758
1759
1760 /***********************************************************************
1761 * get_exception_context
1762 *
1763 * Get a pointer to the context built by setup_exception.
1764 */
1765 static inline CONTEXT *get_exception_context( EXCEPTION_RECORD *rec )
1766 {
1767 return (CONTEXT *)rec - 1; /* cf. stack_layout structure */
1768 }
1769
1770
1771 /**********************************************************************
1772 * get_fpu_code
1773 *
1774 * Get the FPU exception code from the FPU status.
1775 */
1776 static inline DWORD get_fpu_code( const CONTEXT *context )
1777 {
1778 DWORD status = context->FloatSave.StatusWord & ~(context->FloatSave.ControlWord & 0x3f);
1779
1780 if (status & 0x01) /* IE */
1781 {
1782 if (status & 0x40) /* SF */
1783 return EXCEPTION_FLT_STACK_CHECK;
1784 else
1785 return EXCEPTION_FLT_INVALID_OPERATION;
1786 }
1787 if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
1788 if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
1789 if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
1790 if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
1791 if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
1792 return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
1793 }
1794
1795
1796 /**********************************************************************
1797 * raise_segv_exception
1798 */
1799 static void WINAPI raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1800 {
1801 NTSTATUS status;
1802
1803 switch(rec->ExceptionCode)
1804 {
1805 case EXCEPTION_ACCESS_VIOLATION:
1806 if (rec->NumberParameters == 2)
1807 {
1808 if (rec->ExceptionInformation[0] == EXCEPTION_EXECUTE_FAULT && check_atl_thunk( rec, context ))
1809 goto done;
1810 if (rec->ExceptionInformation[1] == 0xffffffff && check_invalid_gs( context ))
1811 goto done;
1812 if (!(rec->ExceptionCode = virtual_handle_fault( (void *)rec->ExceptionInformation[1],
1813 rec->ExceptionInformation[0] )))
1814 goto done;
1815 /* send EXCEPTION_EXECUTE_FAULT only if data execution prevention is enabled */
1816 if (rec->ExceptionInformation[0] == EXCEPTION_EXECUTE_FAULT)
1817 {
1818 ULONG flags;
1819 NtQueryInformationProcess( GetCurrentProcess(), ProcessExecuteFlags,
1820 &flags, sizeof(flags), NULL );
1821 if (!(flags & MEM_EXECUTE_OPTION_DISABLE))
1822 rec->ExceptionInformation[0] = EXCEPTION_READ_FAULT;
1823 }
1824 }
1825 break;
1826 case EXCEPTION_DATATYPE_MISALIGNMENT:
1827 /* FIXME: pass through exception handler first? */
1828 if (context->EFlags & 0x00040000)
1829 {
1830 /* Disable AC flag, return */
1831 context->EFlags &= ~0x00040000;
1832 goto done;
1833 }
1834 break;
1835 }
1836 status = NtRaiseException( rec, context, TRUE );
1837 raise_status( status, rec );
1838 done:
1839 set_cpu_context( context );
1840 }
1841
1842
1843 /**********************************************************************
1844 * raise_trap_exception
1845 */
1846 static void WINAPI raise_trap_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1847 {
1848 NTSTATUS status;
1849
1850 if (rec->ExceptionCode == EXCEPTION_SINGLE_STEP)
1851 {
1852 /* when single stepping can't tell whether this is a hw bp or a
1853 * single step interrupt. try to avoid as much overhead as possible
1854 * and only do a server call if there is any hw bp enabled. */
1855
1856 if( !(context->EFlags & 0x100) || (ntdll_get_thread_data()->dr7 & 0xff) )
1857 {
1858 /* (possible) hardware breakpoint, fetch the debug registers */
1859 DWORD saved_flags = context->ContextFlags;
1860 context->ContextFlags = CONTEXT_DEBUG_REGISTERS;
1861 NtGetContextThread(GetCurrentThread(), context);
1862 context->ContextFlags |= saved_flags; /* restore flags */
1863 }
1864
1865 context->EFlags &= ~0x100; /* clear single-step flag */
1866 }
1867
1868 status = NtRaiseException( rec, context, TRUE );
1869 raise_status( status, rec );
1870 }
1871
1872
1873 /**********************************************************************
1874 * raise_generic_exception
1875 *
1876 * Generic raise function for exceptions that don't need special treatment.
1877 */
1878 static void WINAPI raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1879 {
1880 NTSTATUS status;
1881
1882 status = NtRaiseException( rec, context, TRUE );
1883 raise_status( status, rec );
1884 }
1885
1886
1887 #ifdef __HAVE_VM86
1888 /**********************************************************************
1889 * raise_vm86_sti_exception
1890 */
1891 static void WINAPI raise_vm86_sti_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1892 {
1893 /* merge_vm86_pending_flags merges the vm86_pending flag in safely */
1894 get_vm86_teb_info()->vm86_pending |= VIP_FLAG;
1895
1896 if (ntdll_get_thread_data()->vm86_ptr)
1897 {
1898 if (((char*)context->Eip >= (char*)vm86_return) &&
1899 ((char*)context->Eip <= (char*)vm86_return_end) &&
1900 (VM86_TYPE(context->Eax) != VM86_SIGNAL)) {
1901 /* exiting from VM86, can't throw */
1902 goto done;
1903 }
1904 merge_vm86_pending_flags( rec );
1905 }
1906 else if (get_vm86_teb_info()->dpmi_vif &&
1907 !wine_ldt_is_system(context->SegCs) &&
1908 !wine_ldt_is_system(context->SegSs))
1909 {
1910 /* Executing DPMI code and virtual interrupts are enabled. */
1911 get_vm86_teb_info()->vm86_pending = 0;
1912 NtRaiseException( rec, context, TRUE );
1913 }
1914 done:
1915 set_cpu_context( context );
1916 }
1917
1918
1919 /**********************************************************************
1920 * usr2_handler
1921 *
1922 * Handler for SIGUSR2.
1923 * We use it to signal that the running __wine_enter_vm86() should
1924 * immediately set VIP_FLAG, causing pending events to be handled
1925 * as early as possible.
1926 */
1927 static void usr2_handler( int signal, siginfo_t *siginfo, void *sigcontext )
1928 {
1929 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_vm86_sti_exception );
1930 rec->ExceptionCode = EXCEPTION_VM86_STI;
1931 }
1932 #endif /* __HAVE_VM86 */
1933
1934
1935 /**********************************************************************
1936 * segv_handler
1937 *
1938 * Handler for SIGSEGV and related errors.
1939 */
1940 static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
1941 {
1942 WORD fs, gs;
1943 EXCEPTION_RECORD *rec;
1944 ucontext_t *context = sigcontext;
1945 void *stack = init_handler( sigcontext, &fs, &gs );
1946
1947 /* check for page fault inside the thread stack */
1948 if (get_trap_code(context) == TRAP_x86_PAGEFLT &&
1949 (char *)siginfo->si_addr >= (char *)NtCurrentTeb()->DeallocationStack &&
1950 (char *)siginfo->si_addr < (char *)NtCurrentTeb()->Tib.StackBase &&
1951 virtual_handle_stack_fault( siginfo->si_addr ))
1952 {
1953 /* check if this was the last guard page */
1954 if ((char *)siginfo->si_addr < (char *)NtCurrentTeb()->DeallocationStack + 2*4096)
1955 {
1956 rec = setup_exception_record( context, stack, fs, gs, raise_segv_exception );
1957 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
1958 }
1959 return;
1960 }
1961
1962 rec = setup_exception_record( context, stack, fs, gs, raise_segv_exception );
1963 if (rec->ExceptionCode == EXCEPTION_STACK_OVERFLOW) return;
1964
1965 switch(get_trap_code(context))
1966 {
1967 case TRAP_x86_OFLOW: /* Overflow exception */
1968 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
1969 break;
1970 case TRAP_x86_BOUND: /* Bound range exception */
1971 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
1972 break;
1973 case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
1974 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
1975 break;
1976 case TRAP_x86_STKFLT: /* Stack fault */
1977 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
1978 break;
1979 case TRAP_x86_SEGNPFLT: /* Segment not present exception */
1980 case TRAP_x86_PROTFLT: /* General protection fault */
1981 case TRAP_x86_UNKNOWN: /* Unknown fault code */
1982 {
1983 WORD err = get_error_code(context);
1984 if (!err && (rec->ExceptionCode = is_privileged_instr( get_exception_context(rec) ))) break;
1985 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
1986 rec->NumberParameters = 2;
1987 rec->ExceptionInformation[0] = 0;
1988 /* if error contains a LDT selector, use that as fault address */
1989 if ((err & 7) == 4 && !wine_ldt_is_system( err | 7 ))
1990 rec->ExceptionInformation[1] = err & ~7;
1991 else
1992 rec->ExceptionInformation[1] = 0xffffffff;
1993 }
1994 break;
1995 case TRAP_x86_PAGEFLT: /* Page fault */
1996 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
1997 rec->NumberParameters = 2;
1998 rec->ExceptionInformation[0] = (get_error_code(context) >> 1) & 0x09;
1999 rec->ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
2000 break;
2001 case TRAP_x86_ALIGNFLT: /* Alignment check exception */
2002 rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
2003 break;
2004 default:
2005 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) );
2006 /* fall through */
2007 case TRAP_x86_NMI: /* NMI interrupt */
2008 case TRAP_x86_DNA: /* Device not available exception */
2009 case TRAP_x86_DOUBLEFLT: /* Double fault exception */
2010 case TRAP_x86_TSSFLT: /* Invalid TSS exception */
2011 case TRAP_x86_MCHK: /* Machine check exception */
2012 case TRAP_x86_CACHEFLT: /* Cache flush exception */
2013 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2014 break;
2015 }
2016 }
2017
2018
2019 /**********************************************************************
2020 * trap_handler
2021 *
2022 * Handler for SIGTRAP.
2023 */
2024 static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2025 {
2026 ucontext_t *context = sigcontext;
2027 EXCEPTION_RECORD *rec = setup_exception( context, raise_trap_exception );
2028
2029 switch(get_trap_code(context))
2030 {
2031 case TRAP_x86_TRCTRAP: /* Single-step exception */
2032 rec->ExceptionCode = EXCEPTION_SINGLE_STEP;
2033 break;
2034 case TRAP_x86_BPTFLT: /* Breakpoint exception */
2035 rec->ExceptionAddress = (char *)rec->ExceptionAddress - 1; /* back up over the int3 instruction */
2036 /* fall through */
2037 default:
2038 rec->ExceptionCode = EXCEPTION_BREAKPOINT;
2039 break;
2040 }
2041 }
2042
2043
2044 /**********************************************************************
2045 * fpe_handler
2046 *
2047 * Handler for SIGFPE.
2048 */
2049 static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2050 {
2051 CONTEXT *win_context;
2052 ucontext_t *context = sigcontext;
2053 EXCEPTION_RECORD *rec = setup_exception( context, raise_generic_exception );
2054
2055 win_context = get_exception_context( rec );
2056
2057 switch(get_trap_code(context))
2058 {
2059 case TRAP_x86_DIVIDE: /* Division by zero exception */
2060 rec->ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
2061 break;
2062 case TRAP_x86_FPOPFLT: /* Coprocessor segment overrun */
2063 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2064 break;
2065 case TRAP_x86_ARITHTRAP: /* Floating point exception */
2066 case TRAP_x86_UNKNOWN: /* Unknown fault code */
2067 rec->ExceptionCode = get_fpu_code( win_context );
2068 rec->ExceptionAddress = (LPVOID)win_context->FloatSave.ErrorOffset;
2069 break;
2070 case TRAP_x86_CACHEFLT: /* SIMD exception */
2071 /* TODO:
2072 * Behaviour only tested for divide-by-zero exceptions
2073 * Check for other SIMD exceptions as well */
2074 if(siginfo->si_code != FPE_FLTDIV)
2075 FIXME("untested SIMD exception: %#x. Might not work correctly\n",
2076 siginfo->si_code);
2077
2078 rec->ExceptionCode = STATUS_FLOAT_MULTIPLE_TRAPS;
2079 rec->NumberParameters = 1;
2080 /* no idea what meaning is actually behind this but that's what native does */
2081 rec->ExceptionInformation[0] = 0;
2082 break;
2083 default:
2084 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) );
2085 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2086 break;
2087 }
2088 }
2089
2090
2091 /**********************************************************************
2092 * int_handler
2093 *
2094 * Handler for SIGINT.
2095 *
2096 * FIXME: should not be calling external functions on the signal stack.
2097 */
2098 static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2099 {
2100 WORD fs, gs;
2101 init_handler( sigcontext, &fs, &gs );
2102 if (!dispatch_signal(SIGINT))
2103 {
2104 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2105 rec->ExceptionCode = CONTROL_C_EXIT;
2106 }
2107 }
2108
2109 /**********************************************************************
2110 * abrt_handler
2111 *
2112 * Handler for SIGABRT.
2113 */
2114 static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2115 {
2116 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2117 rec->ExceptionCode = EXCEPTION_WINE_ASSERTION;
2118 rec->ExceptionFlags = EH_NONCONTINUABLE;
2119 }
2120
2121
2122 /**********************************************************************
2123 * quit_handler
2124 *
2125 * Handler for SIGQUIT.
2126 */
2127 static void quit_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2128 {
2129 WORD fs, gs;
2130 init_handler( sigcontext, &fs, &gs );
2131 abort_thread(0);
2132 }
2133
2134
2135 /**********************************************************************
2136 * usr1_handler
2137 *
2138 * Handler for SIGUSR1, used to signal a thread that it got suspended.
2139 */
2140 static void usr1_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2141 {
2142 CONTEXT context;
2143 WORD fs, gs;
2144
2145 init_handler( sigcontext, &fs, &gs );
2146 save_context( &context, sigcontext, fs, gs );
2147 wait_suspend( &context );
2148 restore_context( &context, sigcontext );
2149 }
2150
2151
2152 /***********************************************************************
2153 * __wine_set_signal_handler (NTDLL.@)
2154 */
2155 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
2156 {
2157 if (sig >= sizeof(handlers) / sizeof(handlers[0])) return -1;
2158 if (handlers[sig] != NULL) return -2;
2159 handlers[sig] = wsh;
2160 return 0;
2161 }
2162
2163
2164 /***********************************************************************
2165 * locking for LDT routines
2166 */
2167 static RTL_CRITICAL_SECTION ldt_section;
2168 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
2169 {
2170 0, 0, &ldt_section,
2171 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
2172 0, 0, { (DWORD_PTR)(__FILE__ ": ldt_section") }
2173 };
2174 static RTL_CRITICAL_SECTION ldt_section = { &critsect_debug, -1, 0, 0, 0, 0 };
2175 static sigset_t ldt_sigset;
2176
2177 static void ldt_lock(void)
2178 {
2179 sigset_t sigset;
2180
2181 pthread_sigmask( SIG_BLOCK, &server_block_set, &sigset );
2182 RtlEnterCriticalSection( &ldt_section );
2183 if (ldt_section.RecursionCount == 1) ldt_sigset = sigset;
2184 }
2185
2186 static void ldt_unlock(void)
2187 {
2188 if (ldt_section.RecursionCount == 1)
2189 {
2190 sigset_t sigset = ldt_sigset;
2191 RtlLeaveCriticalSection( &ldt_section );
2192 pthread_sigmask( SIG_SETMASK, &sigset, NULL );
2193 }
2194 else RtlLeaveCriticalSection( &ldt_section );
2195 }
2196
2197
2198 /**********************************************************************
2199 * signal_alloc_thread
2200 */
2201 NTSTATUS signal_alloc_thread( TEB **teb )
2202 {
2203 static size_t sigstack_zero_bits;
2204 struct ntdll_thread_data *thread_data;
2205 struct ntdll_thread_data *parent_data = NULL;
2206 SIZE_T size;
2207 void *addr = NULL;
2208 NTSTATUS status;
2209
2210 if (!sigstack_zero_bits)
2211 {
2212 size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 );
2213 /* find the first power of two not smaller than min_size */
2214 sigstack_zero_bits = 12;
2215 while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
2216 signal_stack_mask = (1 << sigstack_zero_bits) - 1;
2217 signal_stack_size = (1 << sigstack_zero_bits) - teb_size;
2218 }
2219 else parent_data = ntdll_get_thread_data();
2220
2221 size = signal_stack_mask + 1;
2222 if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), &addr, sigstack_zero_bits,
2223 &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
2224 {
2225 *teb = addr;
2226 (*teb)->Tib.Self = &(*teb)->Tib;
2227 (*teb)->Tib.ExceptionList = (void *)~0UL;
2228 thread_data = (struct ntdll_thread_data *)(*teb)->SpareBytes1;
2229 if (!(thread_data->fs = wine_ldt_alloc_fs()))
2230 {
2231 size = 0;
2232 NtFreeVirtualMemory( NtCurrentProcess(), &addr, &size, MEM_RELEASE );
2233 status = STATUS_TOO_MANY_THREADS;
2234 }
2235 if (parent_data)
2236 {
2237 /* inherit debug registers from parent thread */
2238 thread_data->dr0 = parent_data->dr0;
2239 thread_data->dr1 = parent_data->dr1;
2240 thread_data->dr2 = parent_data->dr2;
2241 thread_data->dr3 = parent_data->dr3;
2242 thread_data->dr6 = parent_data->dr6;
2243 thread_data->dr7 = parent_data->dr7;
2244 }
2245
2246 }
2247 return status;
2248 }
2249
2250
2251 /**********************************************************************
2252 * signal_free_thread
2253 */
2254 void signal_free_thread( TEB *teb )
2255 {
2256 SIZE_T size;
2257 struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)teb->SpareBytes1;
2258
2259 if (thread_data) wine_ldt_free_fs( thread_data->fs );
2260 if (teb->DeallocationStack)
2261 {
2262 size = 0;
2263 NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE );
2264 }
2265 size = 0;
2266 NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
2267 }
2268
2269
2270 /**********************************************************************
2271 * signal_init_thread
2272 */
2273 void signal_init_thread( TEB *teb )
2274 {
2275 const WORD fpu_cw = 0x27f;
2276 struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)teb->SpareBytes1;
2277 LDT_ENTRY fs_entry;
2278 stack_t ss;
2279
2280 #ifdef __APPLE__
2281 int mib[2], val = 1;
2282
2283 mib[0] = CTL_KERN;
2284 mib[1] = KERN_THALTSTACK;
2285 sysctl( mib, 2, NULL, NULL, &val, sizeof(val) );
2286 #endif
2287
2288 ss.ss_sp = (char *)teb + teb_size;
2289 ss.ss_size = signal_stack_size;
2290 ss.ss_flags = 0;
2291 if (sigaltstack(&ss, NULL) == -1) perror( "sigaltstack" );
2292
2293 wine_ldt_set_base( &fs_entry, teb );
2294 wine_ldt_set_limit( &fs_entry, teb_size - 1 );
2295 wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
2296 wine_ldt_init_fs( thread_data->fs, &fs_entry );
2297 thread_data->gs = wine_get_gs();
2298
2299 #ifdef __GNUC__
2300 __asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw));
2301 #else
2302 FIXME("FPU setup not implemented for this platform.\n");
2303 #endif
2304 }
2305
2306 /**********************************************************************
2307 * signal_init_process
2308 */
2309 void signal_init_process(void)
2310 {
2311 struct sigaction sig_act;
2312
2313 sig_act.sa_mask = server_block_set;
2314 sig_act.sa_flags = SA_SIGINFO | SA_RESTART;
2315 #ifdef SA_ONSTACK
2316 sig_act.sa_flags |= SA_ONSTACK;
2317 #endif
2318 #ifdef __ANDROID__
2319 sig_act.sa_flags |= SA_RESTORER;
2320 sig_act.sa_restorer = rt_sigreturn;
2321 #endif
2322 sig_act.sa_sigaction = int_handler;
2323 if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
2324 sig_act.sa_sigaction = fpe_handler;
2325 if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
2326 sig_act.sa_sigaction = abrt_handler;
2327 if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
2328 sig_act.sa_sigaction = quit_handler;
2329 if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
2330 sig_act.sa_sigaction = usr1_handler;
2331 if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
2332
2333 sig_act.sa_sigaction = segv_handler;
2334 if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
2335 if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
2336 #ifdef SIGBUS
2337 if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
2338 #endif
2339
2340 #ifdef SIGTRAP
2341 sig_act.sa_sigaction = trap_handler;
2342 if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
2343 #endif
2344
2345 #ifdef __HAVE_VM86
2346 sig_act.sa_sigaction = usr2_handler;
2347 if (sigaction( SIGUSR2, &sig_act, NULL ) == -1) goto error;
2348 #endif
2349
2350 wine_ldt_init_locking( ldt_lock, ldt_unlock );
2351 return;
2352
2353 error:
2354 perror("sigaction");
2355 exit(1);
2356 }
2357
2358
2359 #ifdef __HAVE_VM86
2360 /**********************************************************************
2361 * __wine_enter_vm86 (NTDLL.@)
2362 *
2363 * Enter vm86 mode with the specified register context.
2364 */
2365 void __wine_enter_vm86( CONTEXT *context )
2366 {
2367 EXCEPTION_RECORD rec;
2368 int res;
2369 struct vm86plus_struct vm86;
2370
2371 memset( &vm86, 0, sizeof(vm86) );
2372 for (;;)
2373 {
2374 restore_vm86_context( context, &vm86 );
2375
2376 ntdll_get_thread_data()->vm86_ptr = &vm86;
2377 merge_vm86_pending_flags( &rec );
2378
2379 res = vm86_enter( &ntdll_get_thread_data()->vm86_ptr ); /* uses and clears teb->vm86_ptr */
2380 if (res < 0)
2381 {
2382 errno = -res;
2383 return;
2384 }
2385
2386 save_vm86_context( context, &vm86 );
2387
2388 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
2389 rec.ExceptionRecord = NULL;
2390 rec.ExceptionAddress = (LPVOID)context->Eip;
2391 rec.NumberParameters = 0;
2392
2393 switch(VM86_TYPE(res))
2394 {
2395 case VM86_UNKNOWN: /* unhandled GP fault - IO-instruction or similar */
2396 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
2397 break;
2398 case VM86_TRAP: /* return due to DOS-debugger request */
2399 switch(VM86_ARG(res))
2400 {
2401 case TRAP_x86_TRCTRAP: /* Single-step exception */
2402 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
2403 break;
2404 case TRAP_x86_BPTFLT: /* Breakpoint exception */
2405 rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */
2406 /* fall through */
2407 default:
2408 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
2409 break;
2410 }
2411 break;
2412 case VM86_INTx: /* int3/int x instruction (ARG = x) */
2413 rec.ExceptionCode = EXCEPTION_VM86_INTx;
2414 rec.NumberParameters = 1;
2415 rec.ExceptionInformation[0] = VM86_ARG(res);
2416 break;
2417 case VM86_STI: /* sti/popf/iret instruction enabled virtual interrupts */
2418 context->EFlags |= VIF_FLAG;
2419 context->EFlags &= ~VIP_FLAG;
2420 get_vm86_teb_info()->vm86_pending = 0;
2421 rec.ExceptionCode = EXCEPTION_VM86_STI;
2422 break;
2423 case VM86_PICRETURN: /* return due to pending PIC request */
2424 rec.ExceptionCode = EXCEPTION_VM86_PICRETURN;
2425 break;
2426 case VM86_SIGNAL: /* cannot happen because vm86_enter handles this case */
2427 default:
2428 WINE_ERR( "unhandled result from vm86 mode %x\n", res );
2429 continue;
2430 }
2431 raise_exception( &rec, context, TRUE );
2432 }
2433 }
2434
2435 #else /* __HAVE_VM86 */
2436 /**********************************************************************
2437 * __wine_enter_vm86 (NTDLL.@)
2438 */
2439 void __wine_enter_vm86( CONTEXT *context )
2440 {
2441 MESSAGE("vm86 mode not supported on this platform\n");
2442 }
2443 #endif /* __HAVE_VM86 */
2444
2445
2446 /*******************************************************************
2447 * RtlUnwind (NTDLL.@)
2448 */
2449 void WINAPI __regs_RtlUnwind( EXCEPTION_REGISTRATION_RECORD* pEndFrame, PVOID targetIp,
2450 PEXCEPTION_RECORD pRecord, PVOID retval, CONTEXT *context )
2451 {
2452 EXCEPTION_RECORD record;
2453 EXCEPTION_REGISTRATION_RECORD *frame, *dispatch;
2454 DWORD res;
2455
2456 context->Eax = (DWORD)retval;
2457
2458 /* build an exception record, if we do not have one */
2459 if (!pRecord)
2460 {
2461 record.ExceptionCode = STATUS_UNWIND;
2462 record.ExceptionFlags = 0;
2463 record.ExceptionRecord = NULL;
2464 record.ExceptionAddress = (void *)context->Eip;
2465 record.NumberParameters = 0;
2466 pRecord = &record;
2467 }
2468
2469 pRecord->ExceptionFlags |= EH_UNWINDING | (pEndFrame ? 0 : EH_EXIT_UNWIND);
2470
2471 TRACE( "code=%x flags=%x\n", pRecord->ExceptionCode, pRecord->ExceptionFlags );
2472
2473 /* get chain of exception frames */
2474 frame = NtCurrentTeb()->Tib.ExceptionList;
2475 while ((frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL) && (frame != pEndFrame))
2476 {
2477 /* Check frame address */
2478 if (pEndFrame && (frame > pEndFrame))
2479 raise_status( STATUS_INVALID_UNWIND_TARGET, pRecord );
2480
2481 if (!is_valid_frame( frame )) raise_status( STATUS_BAD_STACK, pRecord );
2482
2483 /* Call handler */
2484 TRACE( "calling handler at %p code=%x flags=%x\n",
2485 frame->Handler, pRecord->ExceptionCode, pRecord->ExceptionFlags );
2486 res = EXC_CallHandler( pRecord, frame, context, &dispatch, frame->Handler, unwind_handler );
2487 TRACE( "handler at %p returned %x\n", frame->Handler, res );
2488
2489 switch(res)
2490 {
2491 case ExceptionContinueSearch:
2492 break;
2493 case ExceptionCollidedUnwind:
2494 frame = dispatch;
2495 break;
2496 default:
2497 raise_status( STATUS_INVALID_DISPOSITION, pRecord );
2498 break;
2499 }
2500 frame = __wine_pop_frame( frame );
2501 }
2502 }
2503 DEFINE_REGS_ENTRYPOINT( RtlUnwind, 4 )
2504
2505
2506 /*******************************************************************
2507 * NtRaiseException (NTDLL.@)
2508 */
2509 NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
2510 {
2511 NTSTATUS status = raise_exception( rec, context, first_chance );
2512 if (status == STATUS_SUCCESS)
2513 {
2514 set_debug_registers( context );
2515 set_cpu_context( context );
2516 }
2517 return status;
2518 }
2519
2520
2521 /***********************************************************************
2522 * RtlRaiseException (NTDLL.@)
2523 */
2524 void WINAPI __regs_RtlRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context )
2525 {
2526 NTSTATUS status;
2527
2528 rec->ExceptionAddress = (void *)context->Eip;
2529 status = raise_exception( rec, context, TRUE );
2530 if (status != STATUS_SUCCESS) raise_status( status, rec );
2531 }
2532 DEFINE_REGS_ENTRYPOINT( RtlRaiseException, 1 )
2533
2534
2535 /*************************************************************************
2536 * RtlCaptureStackBackTrace (NTDLL.@)
2537 */
2538 USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
2539 {
2540 CONTEXT context;
2541 ULONG i;
2542 ULONG *frame;
2543
2544 RtlCaptureContext( &context );
2545 if (hash) *hash = 0;
2546 frame = (ULONG *)context.Ebp;
2547
2548 while (skip--)
2549 {
2550 if (!is_valid_frame( frame )) return 0;
2551 frame = (ULONG *)*frame;
2552 }
2553
2554 for (i = 0; i < count; i++)
2555 {
2556 if (!is_valid_frame( frame )) break;
2557 buffer[i] = (void *)frame[1];
2558 if (hash) *hash += frame[1];
2559 frame = (ULONG *)*frame;
2560 }
2561 return i;
2562 }
2563
2564
2565 extern void DECLSPEC_NORETURN call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void *arg );
2566 __ASM_GLOBAL_FUNC( call_thread_entry_point,
2567 "pushl %ebp\n\t"
2568 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2569 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2570 "movl %esp,%ebp\n\t"
2571 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2572 "pushl %ebx\n\t"
2573 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2574 "pushl %esi\n\t"
2575 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
2576 "pushl %edi\n\t"
2577 __ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
2578 "pushl %ebp\n\t"
2579 "pushl 12(%ebp)\n\t"
2580 "pushl 8(%ebp)\n\t"
2581 "call " __ASM_NAME("call_thread_func") );
2582
2583 extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), void *frame );
2584 __ASM_GLOBAL_FUNC( call_thread_exit_func,
2585 "movl 4(%esp),%eax\n\t"
2586 "movl 8(%esp),%ecx\n\t"
2587 "movl 12(%esp),%ebp\n\t"
2588 __ASM_CFI(".cfi_def_cfa %ebp,4\n\t")
2589 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2590 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2591 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
2592 __ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
2593 "leal -20(%ebp),%esp\n\t"
2594 "pushl %eax\n\t"
2595 "call *%ecx" );
2596
2597 /* wrapper for apps that don't declare the thread function correctly */
2598 extern void DECLSPEC_NORETURN call_thread_func_wrapper( LPTHREAD_START_ROUTINE entry, void *arg );
2599 __ASM_GLOBAL_FUNC(call_thread_func_wrapper,
2600 "pushl %ebp\n\t"
2601 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2602 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2603 "movl %esp,%ebp\n\t"
2604 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2605 "subl $4,%esp\n\t"
2606 "pushl 12(%ebp)\n\t"
2607 "call *8(%ebp)\n\t"
2608 "leal -4(%ebp),%esp\n\t"
2609 "pushl %eax\n\t"
2610 "call " __ASM_NAME("exit_thread") "\n\t"
2611 "int $3" )
2612
2613 /***********************************************************************
2614 * call_thread_func
2615 */
2616 void call_thread_func( LPTHREAD_START_ROUTINE entry, void *arg, void *frame )
2617 {
2618 ntdll_get_thread_data()->exit_frame = frame;
2619 __TRY
2620 {
2621 call_thread_func_wrapper( entry, arg );
2622 }
2623 __EXCEPT(unhandled_exception_filter)
2624 {
2625 NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
2626 }
2627 __ENDTRY
2628 abort(); /* should not be reached */
2629 }
2630
2631 /***********************************************************************
2632 * RtlExitUserThread (NTDLL.@)
2633 */
2634 void WINAPI RtlExitUserThread( ULONG status )
2635 {
2636 if (!ntdll_get_thread_data()->exit_frame) exit_thread( status );
2637 call_thread_exit_func( status, exit_thread, ntdll_get_thread_data()->exit_frame );
2638 }
2639
2640 /***********************************************************************
2641 * abort_thread
2642 */
2643 void abort_thread( int status )
2644 {
2645 if (!ntdll_get_thread_data()->exit_frame) terminate_thread( status );
2646 call_thread_exit_func( status, terminate_thread, ntdll_get_thread_data()->exit_frame );
2647 }
2648
2649 /**********************************************************************
2650 * DbgBreakPoint (NTDLL.@)
2651 */
2652 __ASM_STDCALL_FUNC( DbgBreakPoint, 0, "int $3; ret")
2653
2654 /**********************************************************************
2655 * DbgUserBreakPoint (NTDLL.@)
2656 */
2657 __ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "int $3; ret")
2658
2659 /**********************************************************************
2660 * NtCurrentTeb (NTDLL.@)
2661 */
2662 __ASM_STDCALL_FUNC( NtCurrentTeb, 0, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" )
2663
2664
2665 /**************************************************************************
2666 * _chkstk (NTDLL.@)
2667 */
2668 __ASM_STDCALL_FUNC( _chkstk, 0,
2669 "negl %eax\n\t"
2670 "addl %esp,%eax\n\t"
2671 "xchgl %esp,%eax\n\t"
2672 "movl 0(%eax),%eax\n\t" /* copy return address from old location */
2673 "movl %eax,0(%esp)\n\t"
2674 "ret" )
2675
2676 /**************************************************************************
2677 * _alloca_probe (NTDLL.@)
2678 */
2679 __ASM_STDCALL_FUNC( _alloca_probe, 0,
2680 "negl %eax\n\t"
2681 "addl %esp,%eax\n\t"
2682 "xchgl %esp,%eax\n\t"
2683 "movl 0(%eax),%eax\n\t" /* copy return address from old location */
2684 "movl %eax,0(%esp)\n\t"
2685 "ret" )
2686
2687
2688 /**********************************************************************
2689 * EXC_CallHandler (internal)
2690 *
2691 * Some exception handlers depend on EBP to have a fixed position relative to
2692 * the exception frame.
2693 * Shrinker depends on (*1) doing what it does,
2694 * (*2) being the exact instruction it is and (*3) beginning with 0x64
2695 * (i.e. the %fs prefix to the movl instruction). It also depends on the
2696 * function calling the handler having only 5 parameters (*4).
2697 */
2698 __ASM_GLOBAL_FUNC( EXC_CallHandler,
2699 "pushl %ebp\n\t"
2700 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2701 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2702 "movl %esp,%ebp\n\t"
2703 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2704 "pushl %ebx\n\t"
2705 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2706 "movl 28(%ebp), %edx\n\t" /* ugly hack to pass the 6th param needed because of Shrinker */
2707 "pushl 24(%ebp)\n\t"
2708 "pushl 20(%ebp)\n\t"
2709 "pushl 16(%ebp)\n\t"
2710 "pushl 12(%ebp)\n\t"
2711 "pushl 8(%ebp)\n\t"
2712 "call " __ASM_NAME("call_exception_handler") "\n\t"
2713 "popl %ebx\n\t"
2714 __ASM_CFI(".cfi_same_value %ebx\n\t")
2715 "leave\n"
2716 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2717 __ASM_CFI(".cfi_same_value %ebp\n\t")
2718 "ret" )
2719 __ASM_GLOBAL_FUNC(call_exception_handler,
2720 "pushl %ebp\n\t"
2721 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2722 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2723 "movl %esp,%ebp\n\t"
2724 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2725 "subl $12,%esp\n\t"
2726 "pushl 12(%ebp)\n\t" /* make any exceptions in this... */
2727 "pushl %edx\n\t" /* handler be handled by... */
2728 ".byte 0x64\n\t"
2729 "pushl (0)\n\t" /* nested_handler (passed in edx). */
2730 ".byte 0x64\n\t"
2731 "movl %esp,(0)\n\t" /* push the new exception frame onto the exception stack. */
2732 "pushl 20(%ebp)\n\t"
2733 "pushl 16(%ebp)\n\t"
2734 "pushl 12(%ebp)\n\t"
2735 "pushl 8(%ebp)\n\t"
2736 "movl 24(%ebp), %ecx\n\t" /* (*1) */
2737 "call *%ecx\n\t" /* call handler. (*2) */
2738 ".byte 0x64\n\t"
2739 "movl (0), %esp\n\t" /* restore previous... (*3) */
2740 ".byte 0x64\n\t"
2741 "popl (0)\n\t" /* exception frame. */
2742 "movl %ebp, %esp\n\t" /* restore saved stack, in case it was corrupted */
2743 "popl %ebp\n\t"
2744 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2745 __ASM_CFI(".cfi_same_value %ebp\n\t")
2746 "ret $20" ) /* (*4) */
2747
2748 #endif /* __i386__ */
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