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ntdll: Make sure we don't try to attach the main exe a second time.
[wine/zf.git] / dlls / ntdll / signal_i386.c
blobc953d18a652d3bee6566c4cb22c6a65a430f0924
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_SIGNAL_H
46 # include <sys/signal.h>
47 #endif
48 #ifdef HAVE_SYS_SYSCTL_H
49 # include <sys/sysctl.h>
50 #endif
51 #ifdef HAVE_SYS_UCONTEXT_H
52 # include <sys/ucontext.h>
53 #endif
54
55 #include "ntstatus.h"
56 #define WIN32_NO_STATUS
57 #include "windef.h"
58 #include "wine/library.h"
59 #include "ntdll_misc.h"
60 #include "wine/exception.h"
61 #include "wine/debug.h"
62
63 #ifdef HAVE_VALGRIND_MEMCHECK_H
64 #include <valgrind/memcheck.h>
65 #endif
66
67 #undef ERR /* Solaris needs to define this */
68
69 WINE_DEFAULT_DEBUG_CHANNEL(seh);
70 WINE_DECLARE_DEBUG_CHANNEL(relay);
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 __linux__
104
105 #ifndef HAVE_SYS_UCONTEXT_H
106
107 enum
108 {
109 REG_GS, REG_FS, REG_ES, REG_DS, REG_EDI, REG_ESI, REG_EBP, REG_ESP,
110 REG_EBX, REG_EDX, REG_ECX, REG_EAX, REG_TRAPNO, REG_ERR, REG_EIP,
111 REG_CS, REG_EFL, REG_UESP, REG_SS, NGREG
112 };
113
114 typedef int greg_t;
115 typedef greg_t gregset_t[NGREG];
116
117 struct _libc_fpreg
118 {
119 unsigned short significand[4];
120 unsigned short exponent;
121 };
122
123 struct _libc_fpstate
124 {
125 unsigned long cw;
126 unsigned long sw;
127 unsigned long tag;
128 unsigned long ipoff;
129 unsigned long cssel;
130 unsigned long dataoff;
131 unsigned long datasel;
132 struct _libc_fpreg _st[8];
133 unsigned long status;
134 };
135
136 typedef struct _libc_fpstate* fpregset_t;
137
138 typedef struct
139 {
140 gregset_t gregs;
141 fpregset_t fpregs;
142 unsigned long oldmask;
143 unsigned long cr2;
144 } mcontext_t;
145
146 typedef struct ucontext
147 {
148 unsigned long uc_flags;
149 struct ucontext *uc_link;
150 stack_t uc_stack;
151 mcontext_t uc_mcontext;
152 sigset_t uc_sigmask;
153 } ucontext_t;
154 #endif /* HAVE_SYS_UCONTEXT_H */
155
156 #define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX])
157 #define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX])
158 #define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX])
159 #define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX])
160 #define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI])
161 #define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI])
162 #define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP])
163 #define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP])
164
165 #define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS])
166 #define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS])
167 #define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES])
168 #define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS])
169 #define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS])
170 #define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS])
171
172 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
173 #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
174 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
175 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
176
177 #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->uc_mcontext.fpregs))
178 #define FPUX_sig(context) (FPU_sig(context) && !((context)->uc_mcontext.fpregs->status >> 16) ? (XMM_SAVE_AREA32 *)(FPU_sig(context) + 1) : NULL)
179
180 #ifdef __ANDROID__
181 /* custom signal restorer since we may have unmapped the one in vdso, and bionic doesn't check for that */
182 void rt_sigreturn(void);
183 __ASM_GLOBAL_FUNC( rt_sigreturn,
184 "movl $173,%eax\n\t" /* NR_rt_sigreturn */
185 "int $0x80" );
186 #endif
187
188 struct modify_ldt_s
189 {
190 unsigned int entry_number;
191 void *base_addr;
192 unsigned int limit;
193 unsigned int seg_32bit : 1;
194 unsigned int contents : 2;
195 unsigned int read_exec_only : 1;
196 unsigned int limit_in_pages : 1;
197 unsigned int seg_not_present : 1;
198 unsigned int usable : 1;
199 unsigned int garbage : 25;
200 };
201
202 static inline int modify_ldt( int func, struct modify_ldt_s *ptr, unsigned long count )
203 {
204 return syscall( 123 /* SYS_modify_ldt */, func, ptr, count );
205 }
206
207 static inline int set_thread_area( struct modify_ldt_s *ptr )
208 {
209 return syscall( 243 /* SYS_set_thread_area */, ptr );
210 }
211
212 #elif defined (__BSDI__)
213
214 #include <machine/frame.h>
215 typedef struct trapframe ucontext_t;
216
217 #define EAX_sig(context) ((context)->tf_eax)
218 #define EBX_sig(context) ((context)->tf_ebx)
219 #define ECX_sig(context) ((context)->tf_ecx)
220 #define EDX_sig(context) ((context)->tf_edx)
221 #define ESI_sig(context) ((context)->tf_esi)
222 #define EDI_sig(context) ((context)->tf_edi)
223 #define EBP_sig(context) ((context)->tf_ebp)
224
225 #define CS_sig(context) ((context)->tf_cs)
226 #define DS_sig(context) ((context)->tf_ds)
227 #define ES_sig(context) ((context)->tf_es)
228 #define SS_sig(context) ((context)->tf_ss)
229
230 #define EFL_sig(context) ((context)->tf_eflags)
231
232 #define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
233 #define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
234
235 #define FPU_sig(context) NULL /* FIXME */
236 #define FPUX_sig(context) NULL /* FIXME */
237
238 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
239
240 #include <machine/trap.h>
241 #include <machine/segments.h>
242 #include <machine/sysarch.h>
243
244 #define EAX_sig(context) ((context)->uc_mcontext.mc_eax)
245 #define EBX_sig(context) ((context)->uc_mcontext.mc_ebx)
246 #define ECX_sig(context) ((context)->uc_mcontext.mc_ecx)
247 #define EDX_sig(context) ((context)->uc_mcontext.mc_edx)
248 #define ESI_sig(context) ((context)->uc_mcontext.mc_esi)
249 #define EDI_sig(context) ((context)->uc_mcontext.mc_edi)
250 #define EBP_sig(context) ((context)->uc_mcontext.mc_ebp)
251
252 #define CS_sig(context) ((context)->uc_mcontext.mc_cs)
253 #define DS_sig(context) ((context)->uc_mcontext.mc_ds)
254 #define ES_sig(context) ((context)->uc_mcontext.mc_es)
255 #define FS_sig(context) ((context)->uc_mcontext.mc_fs)
256 #define GS_sig(context) ((context)->uc_mcontext.mc_gs)
257 #define SS_sig(context) ((context)->uc_mcontext.mc_ss)
258
259 #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
260 #define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
261 #define EFL_sig(context) ((context)->uc_mcontext.mc_eflags)
262
263 #define EIP_sig(context) ((context)->uc_mcontext.mc_eip)
264 #define ESP_sig(context) ((context)->uc_mcontext.mc_esp)
265
266 #define FPU_sig(context) NULL /* FIXME */
267 #define FPUX_sig(context) NULL /* FIXME */
268
269 #elif defined (__OpenBSD__)
270
271 #include <machine/segments.h>
272 #include <machine/sysarch.h>
273
274 #define EAX_sig(context) ((context)->sc_eax)
275 #define EBX_sig(context) ((context)->sc_ebx)
276 #define ECX_sig(context) ((context)->sc_ecx)
277 #define EDX_sig(context) ((context)->sc_edx)
278 #define ESI_sig(context) ((context)->sc_esi)
279 #define EDI_sig(context) ((context)->sc_edi)
280 #define EBP_sig(context) ((context)->sc_ebp)
281
282 #define CS_sig(context) ((context)->sc_cs)
283 #define DS_sig(context) ((context)->sc_ds)
284 #define ES_sig(context) ((context)->sc_es)
285 #define FS_sig(context) ((context)->sc_fs)
286 #define GS_sig(context) ((context)->sc_gs)
287 #define SS_sig(context) ((context)->sc_ss)
288
289 #define TRAP_sig(context) ((context)->sc_trapno)
290 #define ERROR_sig(context) ((context)->sc_err)
291 #define EFL_sig(context) ((context)->sc_eflags)
292
293 #define EIP_sig(context) ((context)->sc_eip)
294 #define ESP_sig(context) ((context)->sc_esp)
295
296 #define FPU_sig(context) NULL /* FIXME */
297 #define FPUX_sig(context) NULL /* FIXME */
298
299 #define T_MCHK T_MACHK
300 #define T_XMMFLT T_XFTRAP
301
302 #elif defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
303
304 #if defined(_SCO_DS) || defined(__sun)
305 #include <sys/regset.h>
306 #endif
307
308 #ifdef _SCO_DS
309 #define gregs regs
310 #endif
311
312 #define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
313 #define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
314 #define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
315 #define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
316 #define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
317 #define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
318 #define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
319
320 #define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
321 #define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
322 #define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
323 #define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
324
325 #define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
326 #define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
327
328 #define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
329
330 #define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
331 #ifdef UESP
332 #define ESP_sig(context) ((context)->uc_mcontext.gregs[UESP])
333 #elif defined(R_ESP)
334 #define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
335 #else
336 #define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
337 #endif
338 #ifdef ERR
339 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[ERR])
340 #endif
341 #ifdef TRAPNO
342 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
343 #endif
344
345 #define FPU_sig(context) NULL /* FIXME */
346 #define FPUX_sig(context) NULL /* FIXME */
347
348 #elif defined (__APPLE__)
349
350 #include <i386/user_ldt.h>
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 #include <machine/segments.h>
400 #include <machine/sysarch.h>
401
402 #define EAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EAX])
403 #define EBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBX])
404 #define ECX_sig(context) ((context)->uc_mcontext.__gregs[_REG_ECX])
405 #define EDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDX])
406 #define ESI_sig(context) ((context)->uc_mcontext.__gregs[_REG_ESI])
407 #define EDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDI])
408 #define EBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBP])
409 #define ESP_sig(context) _UC_MACHINE_SP(context)
410
411 #define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
412 #define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
413 #define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
414 #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
415 #define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
416 #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
417
418 #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_EFL])
419 #define EIP_sig(context) _UC_MACHINE_PC(context)
420 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
421 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
422
423 #define FPU_sig(context) NULL
424 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&((context)->uc_mcontext.__fpregs))
425
426 #define T_MCHK T_MCA
427 #define T_XMMFLT T_XMM
428
429 #elif defined(__GNU__)
430
431 #include <mach/i386/mach_i386.h>
432 #include <mach/mach_traps.h>
433
434 #define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX])
435 #define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX])
436 #define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX])
437 #define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX])
438 #define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI])
439 #define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI])
440 #define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP])
441 #define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP])
442
443 #define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS])
444 #define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS])
445 #define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES])
446 #define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS])
447 #define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS])
448 #define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS])
449
450 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
451 #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
452 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
453 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
454
455 #define FPU_sig(context) ((FLOATING_SAVE_AREA *)&(context)->uc_mcontext.fpregs.fp_reg_set.fpchip_state)
456 #define FPUX_sig(context) NULL
457
458 #else
459 #error You must define the signal context functions for your platform
460 #endif /* linux */
461
462 /* stack layout when calling an exception raise function */
463 struct stack_layout
464 {
465 void *ret_addr; /* return address from raise_generic_exception */
466 EXCEPTION_RECORD *rec_ptr; /* first arg for raise_generic_exception */
467 CONTEXT *context_ptr; /* second arg for raise_generic_exception */
468 CONTEXT context;
469 EXCEPTION_RECORD rec;
470 DWORD ebp;
471 DWORD eip;
472 };
473
474 typedef int (*wine_signal_handler)(unsigned int sig);
475
476 static const size_t teb_size = 4096; /* we reserve one page for the TEB */
477 static size_t signal_stack_mask;
478 static size_t signal_stack_size;
479
480 static ULONG first_ldt_entry = 32;
481
482 static wine_signal_handler handlers[256];
483
484 enum i386_trap_code
485 {
486 TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
487 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
488 TRAP_x86_DIVIDE = T_DIVIDE, /* Division by zero exception */
489 TRAP_x86_TRCTRAP = T_TRCTRAP, /* Single-step exception */
490 TRAP_x86_NMI = T_NMI, /* NMI interrupt */
491 TRAP_x86_BPTFLT = T_BPTFLT, /* Breakpoint exception */
492 TRAP_x86_OFLOW = T_OFLOW, /* Overflow exception */
493 TRAP_x86_BOUND = T_BOUND, /* Bound range exception */
494 TRAP_x86_PRIVINFLT = T_PRIVINFLT, /* Invalid opcode exception */
495 TRAP_x86_DNA = T_DNA, /* Device not available exception */
496 TRAP_x86_DOUBLEFLT = T_DOUBLEFLT, /* Double fault exception */
497 TRAP_x86_FPOPFLT = T_FPOPFLT, /* Coprocessor segment overrun */
498 TRAP_x86_TSSFLT = T_TSSFLT, /* Invalid TSS exception */
499 TRAP_x86_SEGNPFLT = T_SEGNPFLT, /* Segment not present exception */
500 TRAP_x86_STKFLT = T_STKFLT, /* Stack fault */
501 TRAP_x86_PROTFLT = T_PROTFLT, /* General protection fault */
502 TRAP_x86_PAGEFLT = T_PAGEFLT, /* Page fault */
503 TRAP_x86_ARITHTRAP = T_ARITHTRAP, /* Floating point exception */
504 TRAP_x86_ALIGNFLT = T_ALIGNFLT, /* Alignment check exception */
505 TRAP_x86_MCHK = T_MCHK, /* Machine check exception */
506 TRAP_x86_CACHEFLT = T_XMMFLT /* Cache flush exception */
507 #else
508 TRAP_x86_DIVIDE = 0, /* Division by zero exception */
509 TRAP_x86_TRCTRAP = 1, /* Single-step exception */
510 TRAP_x86_NMI = 2, /* NMI interrupt */
511 TRAP_x86_BPTFLT = 3, /* Breakpoint exception */
512 TRAP_x86_OFLOW = 4, /* Overflow exception */
513 TRAP_x86_BOUND = 5, /* Bound range exception */
514 TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */
515 TRAP_x86_DNA = 7, /* Device not available exception */
516 TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */
517 TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */
518 TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */
519 TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */
520 TRAP_x86_STKFLT = 12, /* Stack fault */
521 TRAP_x86_PROTFLT = 13, /* General protection fault */
522 TRAP_x86_PAGEFLT = 14, /* Page fault */
523 TRAP_x86_ARITHTRAP = 16, /* Floating point exception */
524 TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */
525 TRAP_x86_MCHK = 18, /* Machine check exception */
526 TRAP_x86_CACHEFLT = 19 /* SIMD exception (via SIGFPE) if CPU is SSE capable
527 otherwise Cache flush exception (via SIGSEV) */
528 #endif
529 };
530
531 struct x86_thread_data
532 {
533 DWORD fs; /* 1d4 TEB selector */
534 DWORD gs; /* 1d8 libc selector; update winebuild if you move this! */
535 DWORD dr0; /* 1dc debug registers */
536 DWORD dr1; /* 1e0 */
537 DWORD dr2; /* 1e4 */
538 DWORD dr3; /* 1e8 */
539 DWORD dr6; /* 1ec */
540 DWORD dr7; /* 1f0 */
541 void *exit_frame; /* 1f4 exit frame pointer */
542 /* the ntdll_thread_data structure follows here */
543 };
544
545 C_ASSERT( offsetof( TEB, SystemReserved2 ) + offsetof( struct x86_thread_data, gs ) == 0x1d8 );
546 C_ASSERT( offsetof( TEB, SystemReserved2 ) + offsetof( struct x86_thread_data, exit_frame ) == 0x1f4 );
547
548 static inline struct x86_thread_data *x86_thread_data(void)
549 {
550 return (struct x86_thread_data *)NtCurrentTeb()->SystemReserved2;
551 }
552
553 static inline WORD get_cs(void) { WORD res; __asm__( "movw %%cs,%0" : "=r" (res) ); return res; }
554 static inline WORD get_ds(void) { WORD res; __asm__( "movw %%ds,%0" : "=r" (res) ); return res; }
555 static inline WORD get_fs(void) { WORD res; __asm__( "movw %%fs,%0" : "=r" (res) ); return res; }
556 static inline WORD get_gs(void) { WORD res; __asm__( "movw %%gs,%0" : "=r" (res) ); return res; }
557 static inline void set_fs( WORD val ) { __asm__( "mov %0,%%fs" :: "r" (val)); }
558 static inline void set_gs( WORD val ) { __asm__( "mov %0,%%gs" :: "r" (val)); }
559
560 /* Exception record for handling exceptions happening inside exception handlers */
561 typedef struct
562 {
563 EXCEPTION_REGISTRATION_RECORD frame;
564 EXCEPTION_REGISTRATION_RECORD *prevFrame;
565 } EXC_NESTED_FRAME;
566
567 extern DWORD EXC_CallHandler( EXCEPTION_RECORD *record, EXCEPTION_REGISTRATION_RECORD *frame,
568 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher,
569 PEXCEPTION_HANDLER handler, PEXCEPTION_HANDLER nested_handler );
570
571 /***********************************************************************
572 * is_gdt_sel
573 */
574 static inline int is_gdt_sel( WORD sel )
575 {
576 return !(sel & 4);
577 }
578
579 /***********************************************************************
580 * ldt_is_system
581 */
582 static inline int ldt_is_system( WORD sel )
583 {
584 return is_gdt_sel( sel ) || ((sel >> 3) < first_ldt_entry);
585 }
586
587 /***********************************************************************
588 * dispatch_signal
589 */
590 static inline int dispatch_signal(unsigned int sig)
591 {
592 if (handlers[sig] == NULL) return 0;
593 return handlers[sig](sig);
594 }
595
596
597 /***********************************************************************
598 * get_trap_code
599 *
600 * Get the trap code for a signal.
601 */
602 static inline enum i386_trap_code get_trap_code( const ucontext_t *sigcontext )
603 {
604 #ifdef TRAP_sig
605 return TRAP_sig(sigcontext);
606 #else
607 return TRAP_x86_UNKNOWN; /* unknown trap code */
608 #endif
609 }
610
611 /***********************************************************************
612 * get_error_code
613 *
614 * Get the error code for a signal.
615 */
616 static inline WORD get_error_code( const ucontext_t *sigcontext )
617 {
618 #ifdef ERROR_sig
619 return ERROR_sig(sigcontext);
620 #else
621 return 0;
622 #endif
623 }
624
625 /***********************************************************************
626 * get_signal_stack
627 *
628 * Get the base of the signal stack for the current thread.
629 */
630 static inline void *get_signal_stack(void)
631 {
632 return (char *)NtCurrentTeb() + 4096;
633 }
634
635
636 /***********************************************************************
637 * has_fpux
638 */
639 static inline int has_fpux(void)
640 {
641 return (cpu_info.FeatureSet & CPU_FEATURE_FXSR);
642 }
643
644
645 /***********************************************************************
646 * get_current_teb
647 *
648 * Get the current teb based on the stack pointer.
649 */
650 static inline TEB *get_current_teb(void)
651 {
652 unsigned long esp;
653 __asm__("movl %%esp,%0" : "=g" (esp) );
654 return (TEB *)(esp & ~signal_stack_mask);
655 }
656
657
658 /*******************************************************************
659 * is_valid_frame
660 */
661 static inline BOOL is_valid_frame( void *frame )
662 {
663 if ((ULONG_PTR)frame & 3) return FALSE;
664 return (frame >= NtCurrentTeb()->Tib.StackLimit &&
665 (void **)frame < (void **)NtCurrentTeb()->Tib.StackBase - 1);
666 }
667
668 /*******************************************************************
669 * raise_handler
670 *
671 * Handler for exceptions happening inside a handler.
672 */
673 static DWORD raise_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
674 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
675 {
676 if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
677 return ExceptionContinueSearch;
678 /* We shouldn't get here so we store faulty frame in dispatcher */
679 *dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame;
680 return ExceptionNestedException;
681 }
682
683
684 /*******************************************************************
685 * unwind_handler
686 *
687 * Handler for exceptions happening inside an unwind handler.
688 */
689 static DWORD unwind_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
690 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
691 {
692 if (!(rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)))
693 return ExceptionContinueSearch;
694 /* We shouldn't get here so we store faulty frame in dispatcher */
695 *dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame;
696 return ExceptionCollidedUnwind;
697 }
698
699
700 /**********************************************************************
701 * call_stack_handlers
702 *
703 * Call the stack handlers chain.
704 */
705 static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *context )
706 {
707 EXCEPTION_REGISTRATION_RECORD *frame, *dispatch, *nested_frame;
708 DWORD res;
709
710 frame = NtCurrentTeb()->Tib.ExceptionList;
711 nested_frame = NULL;
712 while (frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL)
713 {
714 /* Check frame address */
715 if (!is_valid_frame( frame ))
716 {
717 rec->ExceptionFlags |= EH_STACK_INVALID;
718 break;
719 }
720
721 /* Call handler */
722 TRACE( "calling handler at %p code=%x flags=%x\n",
723 frame->Handler, rec->ExceptionCode, rec->ExceptionFlags );
724 res = EXC_CallHandler( rec, frame, context, &dispatch, frame->Handler, raise_handler );
725 TRACE( "handler at %p returned %x\n", frame->Handler, res );
726
727 if (frame == nested_frame)
728 {
729 /* no longer nested */
730 nested_frame = NULL;
731 rec->ExceptionFlags &= ~EH_NESTED_CALL;
732 }
733
734 switch(res)
735 {
736 case ExceptionContinueExecution:
737 if (!(rec->ExceptionFlags & EH_NONCONTINUABLE)) return STATUS_SUCCESS;
738 return STATUS_NONCONTINUABLE_EXCEPTION;
739 case ExceptionContinueSearch:
740 break;
741 case ExceptionNestedException:
742 if (nested_frame < dispatch) nested_frame = dispatch;
743 rec->ExceptionFlags |= EH_NESTED_CALL;
744 break;
745 default:
746 return STATUS_INVALID_DISPOSITION;
747 }
748 frame = frame->Prev;
749 }
750 return STATUS_UNHANDLED_EXCEPTION;
751 }
752
753
754 /*******************************************************************
755 * raise_exception
756 *
757 * Implementation of NtRaiseException.
758 */
759 static NTSTATUS raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
760 {
761 NTSTATUS status;
762
763 if (first_chance)
764 {
765 DWORD c;
766
767 TRACE( "code=%x flags=%x addr=%p ip=%08x tid=%04x\n",
768 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
769 context->Eip, GetCurrentThreadId() );
770 for (c = 0; c < rec->NumberParameters; c++)
771 TRACE( " info[%d]=%08lx\n", c, rec->ExceptionInformation[c] );
772 if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
773 {
774 if (rec->ExceptionInformation[1] >> 16)
775 MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
776 rec->ExceptionAddress,
777 (char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
778 else
779 MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
780 rec->ExceptionAddress,
781 (char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
782 }
783 else
784 {
785 TRACE(" eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n",
786 context->Eax, context->Ebx, context->Ecx,
787 context->Edx, context->Esi, context->Edi );
788 TRACE(" ebp=%08x esp=%08x cs=%04x ds=%04x es=%04x fs=%04x gs=%04x flags=%08x\n",
789 context->Ebp, context->Esp, context->SegCs, context->SegDs,
790 context->SegEs, context->SegFs, context->SegGs, context->EFlags );
791 }
792
793 /* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
794 if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context->Eip--;
795
796 if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION) goto done;
797
798 if ((status = call_stack_handlers( rec, context )) == STATUS_SUCCESS) goto done;
799 if (status != STATUS_UNHANDLED_EXCEPTION) return status;
800 }
801
802 /* last chance exception */
803
804 status = send_debug_event( rec, FALSE, context );
805 if (status != DBG_CONTINUE)
806 {
807 if (rec->ExceptionFlags & EH_STACK_INVALID)
808 WINE_ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
809 else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
810 WINE_ERR("Process attempted to continue execution after noncontinuable exception.\n");
811 else
812 WINE_ERR("Unhandled exception code %x flags %x addr %p\n",
813 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
814 NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode );
815 }
816 done:
817 return NtSetContextThread( GetCurrentThread(), context );
818 }
819
820
821 #ifdef __sun
822
823 /* We have to workaround two Solaris breakages:
824 * - Solaris doesn't restore %ds and %es before calling the signal handler so exceptions in 16-bit
825 * code crash badly.
826 * - Solaris inserts a libc trampoline to call our handler, but the trampoline expects that registers
827 * are setup correctly. So we need to insert our own trampoline below the libc trampoline to set %gs.
828 */
829
830 extern int sigaction_syscall( int sig, const struct sigaction *new, struct sigaction *old );
831 __ASM_GLOBAL_FUNC( sigaction_syscall,
832 "movl $0x62,%eax\n\t"
833 "int $0x91\n\t"
834 "ret" )
835
836 /* assume the same libc handler is used for all signals */
837 static void (*libc_sigacthandler)( int signal, siginfo_t *siginfo, void *context );
838
839 static void wine_sigacthandler( int signal, siginfo_t *siginfo, void *sigcontext )
840 {
841 struct x86_thread_data *thread_data;
842
843 __asm__ __volatile__("mov %ss,%ax; mov %ax,%ds; mov %ax,%es");
844
845 thread_data = (struct x86_thread_data *)get_current_teb()->SystemReserved2;
846 set_fs( thread_data->fs );
847 set_gs( thread_data->gs );
848
849 libc_sigacthandler( signal, siginfo, sigcontext );
850 }
851
852 static int solaris_sigaction( int sig, const struct sigaction *new, struct sigaction *old )
853 {
854 struct sigaction real_act;
855
856 if (sigaction( sig, new, old ) == -1) return -1;
857
858 /* retrieve the real handler and flags with a direct syscall */
859 sigaction_syscall( sig, NULL, &real_act );
860 libc_sigacthandler = real_act.sa_sigaction;
861 real_act.sa_sigaction = wine_sigacthandler;
862 sigaction_syscall( sig, &real_act, NULL );
863 return 0;
864 }
865 #define sigaction(sig,new,old) solaris_sigaction(sig,new,old)
866
867 #endif
868
869 extern void clear_alignment_flag(void);
870 __ASM_GLOBAL_FUNC( clear_alignment_flag,
871 "pushfl\n\t"
872 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
873 "andl $~0x40000,(%esp)\n\t"
874 "popfl\n\t"
875 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
876 "ret" )
877
878
879 /***********************************************************************
880 * init_handler
881 *
882 * Handler initialization when the full context is not needed.
883 * Return the stack pointer to use for pushing the exception data.
884 */
885 static inline void *init_handler( const ucontext_t *sigcontext, WORD *fs, WORD *gs )
886 {
887 TEB *teb = get_current_teb();
888
889 clear_alignment_flag();
890
891 /* get %fs and %gs at time of the fault */
892 #ifdef FS_sig
893 *fs = LOWORD(FS_sig(sigcontext));
894 #else
895 *fs = get_fs();
896 #endif
897 #ifdef GS_sig
898 *gs = LOWORD(GS_sig(sigcontext));
899 #else
900 *gs = get_gs();
901 #endif
902
903 #ifndef __sun /* see above for Solaris handling */
904 {
905 struct x86_thread_data *thread_data = (struct x86_thread_data *)teb->SystemReserved2;
906 set_fs( thread_data->fs );
907 set_gs( thread_data->gs );
908 }
909 #endif
910
911 if (!ldt_is_system(CS_sig(sigcontext)) || !ldt_is_system(SS_sig(sigcontext))) /* 16-bit mode */
912 {
913 /*
914 * Win16 or DOS protected mode. Note that during switch
915 * from 16-bit mode to linear mode, CS may be set to system
916 * segment before FS is restored. Fortunately, in this case
917 * SS is still non-system segment. This is why both CS and SS
918 * are checked.
919 */
920 return teb->WOW32Reserved;
921 }
922 return (void *)(ESP_sig(sigcontext) & ~3);
923 }
924
925
926 /***********************************************************************
927 * save_fpu
928 *
929 * Save the thread FPU context.
930 */
931 static inline void save_fpu( CONTEXT *context )
932 {
933 #ifdef __GNUC__
934 struct
935 {
936 DWORD ControlWord;
937 DWORD StatusWord;
938 DWORD TagWord;
939 DWORD ErrorOffset;
940 DWORD ErrorSelector;
941 DWORD DataOffset;
942 DWORD DataSelector;
943 }
944 float_status;
945
946 context->ContextFlags |= CONTEXT_FLOATING_POINT;
947 __asm__ __volatile__( "fnsave %0; fwait" : "=m" (context->FloatSave) );
948
949 /* Reset unmasked exceptions status to avoid firing an exception. */
950 memcpy(&float_status, &context->FloatSave, sizeof(float_status));
951 float_status.StatusWord &= float_status.ControlWord | 0xffffff80;
952
953 __asm__ __volatile__( "fldenv %0" : : "m" (float_status) );
954 #endif
955 }
956
957
958 /***********************************************************************
959 * save_fpux
960 *
961 * Save the thread FPU extended context.
962 */
963 static inline void save_fpux( CONTEXT *context )
964 {
965 #ifdef __GNUC__
966 /* we have to enforce alignment by hand */
967 char buffer[sizeof(XMM_SAVE_AREA32) + 16];
968 XMM_SAVE_AREA32 *state = (XMM_SAVE_AREA32 *)(((ULONG_PTR)buffer + 15) & ~15);
969
970 if (!has_fpux()) return;
971 context->ContextFlags |= CONTEXT_EXTENDED_REGISTERS;
972 __asm__ __volatile__( "fxsave %0" : "=m" (*state) );
973 memcpy( context->ExtendedRegisters, state, sizeof(*state) );
974 #endif
975 }
976
977
978 /***********************************************************************
979 * restore_fpu
980 *
981 * Restore the FPU context to a sigcontext.
982 */
983 static inline void restore_fpu( const CONTEXT *context )
984 {
985 FLOATING_SAVE_AREA float_status = context->FloatSave;
986 /* reset the current interrupt status */
987 float_status.StatusWord &= float_status.ControlWord | 0xffffff80;
988 #ifdef __GNUC__
989 __asm__ __volatile__( "frstor %0; fwait" : : "m" (float_status) );
990 #endif /* __GNUC__ */
991 }
992
993
994 /***********************************************************************
995 * restore_fpux
996 *
997 * Restore the FPU extended context to a sigcontext.
998 */
999 static inline void restore_fpux( const CONTEXT *context )
1000 {
1001 #ifdef __GNUC__
1002 /* we have to enforce alignment by hand */
1003 char buffer[sizeof(XMM_SAVE_AREA32) + 16];
1004 XMM_SAVE_AREA32 *state = (XMM_SAVE_AREA32 *)(((ULONG_PTR)buffer + 15) & ~15);
1005
1006 memcpy( state, context->ExtendedRegisters, sizeof(*state) );
1007 /* reset the current interrupt status */
1008 state->StatusWord &= state->ControlWord | 0xff80;
1009 __asm__ __volatile__( "fxrstor %0" : : "m" (*state) );
1010 #endif
1011 }
1012
1013
1014 /***********************************************************************
1015 * fpux_to_fpu
1016 *
1017 * Build a standard FPU context from an extended one.
1018 */
1019 static void fpux_to_fpu( FLOATING_SAVE_AREA *fpu, const XMM_SAVE_AREA32 *fpux )
1020 {
1021 unsigned int i, tag, stack_top;
1022
1023 fpu->ControlWord = fpux->ControlWord | 0xffff0000;
1024 fpu->StatusWord = fpux->StatusWord | 0xffff0000;
1025 fpu->ErrorOffset = fpux->ErrorOffset;
1026 fpu->ErrorSelector = fpux->ErrorSelector | (fpux->ErrorOpcode << 16);
1027 fpu->DataOffset = fpux->DataOffset;
1028 fpu->DataSelector = fpux->DataSelector;
1029 fpu->Cr0NpxState = fpux->StatusWord | 0xffff0000;
1030
1031 stack_top = (fpux->StatusWord >> 11) & 7;
1032 fpu->TagWord = 0xffff0000;
1033 for (i = 0; i < 8; i++)
1034 {
1035 memcpy( &fpu->RegisterArea[10 * i], &fpux->FloatRegisters[i], 10 );
1036 if (!(fpux->TagWord & (1 << i))) tag = 3; /* empty */
1037 else
1038 {
1039 const M128A *reg = &fpux->FloatRegisters[(i - stack_top) & 7];
1040 if ((reg->High & 0x7fff) == 0x7fff) /* exponent all ones */
1041 {
1042 tag = 2; /* special */
1043 }
1044 else if (!(reg->High & 0x7fff)) /* exponent all zeroes */
1045 {
1046 if (reg->Low) tag = 2; /* special */
1047 else tag = 1; /* zero */
1048 }
1049 else
1050 {
1051 if (reg->Low >> 63) tag = 0; /* valid */
1052 else tag = 2; /* special */
1053 }
1054 }
1055 fpu->TagWord |= tag << (2 * i);
1056 }
1057 }
1058
1059
1060 /***********************************************************************
1061 * save_context
1062 *
1063 * Build a context structure from the signal info.
1064 */
1065 static inline void save_context( CONTEXT *context, const ucontext_t *sigcontext, WORD fs, WORD gs )
1066 {
1067 FLOATING_SAVE_AREA *fpu = FPU_sig(sigcontext);
1068 XMM_SAVE_AREA32 *fpux = FPUX_sig(sigcontext);
1069
1070 memset(context, 0, sizeof(*context));
1071 context->ContextFlags = CONTEXT_FULL | CONTEXT_DEBUG_REGISTERS;
1072 context->Eax = EAX_sig(sigcontext);
1073 context->Ebx = EBX_sig(sigcontext);
1074 context->Ecx = ECX_sig(sigcontext);
1075 context->Edx = EDX_sig(sigcontext);
1076 context->Esi = ESI_sig(sigcontext);
1077 context->Edi = EDI_sig(sigcontext);
1078 context->Ebp = EBP_sig(sigcontext);
1079 context->EFlags = EFL_sig(sigcontext);
1080 context->Eip = EIP_sig(sigcontext);
1081 context->Esp = ESP_sig(sigcontext);
1082 context->SegCs = LOWORD(CS_sig(sigcontext));
1083 context->SegDs = LOWORD(DS_sig(sigcontext));
1084 context->SegEs = LOWORD(ES_sig(sigcontext));
1085 context->SegFs = fs;
1086 context->SegGs = gs;
1087 context->SegSs = LOWORD(SS_sig(sigcontext));
1088 context->Dr0 = x86_thread_data()->dr0;
1089 context->Dr1 = x86_thread_data()->dr1;
1090 context->Dr2 = x86_thread_data()->dr2;
1091 context->Dr3 = x86_thread_data()->dr3;
1092 context->Dr6 = x86_thread_data()->dr6;
1093 context->Dr7 = x86_thread_data()->dr7;
1094
1095 if (fpu)
1096 {
1097 context->ContextFlags |= CONTEXT_FLOATING_POINT;
1098 context->FloatSave = *fpu;
1099 }
1100 if (fpux)
1101 {
1102 context->ContextFlags |= CONTEXT_FLOATING_POINT | CONTEXT_EXTENDED_REGISTERS;
1103 memcpy( context->ExtendedRegisters, fpux, sizeof(*fpux) );
1104 if (!fpu) fpux_to_fpu( &context->FloatSave, fpux );
1105 }
1106 if (!fpu && !fpux) save_fpu( context );
1107 }
1108
1109
1110 /***********************************************************************
1111 * restore_context
1112 *
1113 * Restore the signal info from the context.
1114 */
1115 static inline void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
1116 {
1117 FLOATING_SAVE_AREA *fpu = FPU_sig(sigcontext);
1118 XMM_SAVE_AREA32 *fpux = FPUX_sig(sigcontext);
1119
1120 x86_thread_data()->dr0 = context->Dr0;
1121 x86_thread_data()->dr1 = context->Dr1;
1122 x86_thread_data()->dr2 = context->Dr2;
1123 x86_thread_data()->dr3 = context->Dr3;
1124 x86_thread_data()->dr6 = context->Dr6;
1125 x86_thread_data()->dr7 = context->Dr7;
1126 EAX_sig(sigcontext) = context->Eax;
1127 EBX_sig(sigcontext) = context->Ebx;
1128 ECX_sig(sigcontext) = context->Ecx;
1129 EDX_sig(sigcontext) = context->Edx;
1130 ESI_sig(sigcontext) = context->Esi;
1131 EDI_sig(sigcontext) = context->Edi;
1132 EBP_sig(sigcontext) = context->Ebp;
1133 EFL_sig(sigcontext) = context->EFlags;
1134 EIP_sig(sigcontext) = context->Eip;
1135 ESP_sig(sigcontext) = context->Esp;
1136 CS_sig(sigcontext) = context->SegCs;
1137 DS_sig(sigcontext) = context->SegDs;
1138 ES_sig(sigcontext) = context->SegEs;
1139 SS_sig(sigcontext) = context->SegSs;
1140 #ifdef GS_sig
1141 GS_sig(sigcontext) = context->SegGs;
1142 #else
1143 set_gs( context->SegGs );
1144 #endif
1145 #ifdef FS_sig
1146 FS_sig(sigcontext) = context->SegFs;
1147 #else
1148 set_fs( context->SegFs );
1149 #endif
1150
1151 if (fpu) *fpu = context->FloatSave;
1152 if (fpux) memcpy( fpux, context->ExtendedRegisters, sizeof(*fpux) );
1153 if (!fpu && !fpux) restore_fpu( context );
1154 }
1155
1156
1157 /***********************************************************************
1158 * RtlCaptureContext (NTDLL.@)
1159 */
1160 __ASM_STDCALL_FUNC( RtlCaptureContext, 4,
1161 "pushl %eax\n\t"
1162 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
1163 "movl 8(%esp),%eax\n\t" /* context */
1164 "movl $0x10007,(%eax)\n\t" /* context->ContextFlags */
1165 "movw %gs,0x8c(%eax)\n\t" /* context->SegGs */
1166 "movw %fs,0x90(%eax)\n\t" /* context->SegFs */
1167 "movw %es,0x94(%eax)\n\t" /* context->SegEs */
1168 "movw %ds,0x98(%eax)\n\t" /* context->SegDs */
1169 "movl %edi,0x9c(%eax)\n\t" /* context->Edi */
1170 "movl %esi,0xa0(%eax)\n\t" /* context->Esi */
1171 "movl %ebx,0xa4(%eax)\n\t" /* context->Ebx */
1172 "movl %edx,0xa8(%eax)\n\t" /* context->Edx */
1173 "movl %ecx,0xac(%eax)\n\t" /* context->Ecx */
1174 "movl 0(%ebp),%edx\n\t"
1175 "movl %edx,0xb4(%eax)\n\t" /* context->Ebp */
1176 "movl 4(%ebp),%edx\n\t"
1177 "movl %edx,0xb8(%eax)\n\t" /* context->Eip */
1178 "movw %cs,0xbc(%eax)\n\t" /* context->SegCs */
1179 "pushfl\n\t"
1180 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
1181 "popl 0xc0(%eax)\n\t" /* context->EFlags */
1182 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
1183 "leal 8(%ebp),%edx\n\t"
1184 "movl %edx,0xc4(%eax)\n\t" /* context->Esp */
1185 "movw %ss,0xc8(%eax)\n\t" /* context->SegSs */
1186 "popl 0xb0(%eax)\n\t" /* context->Eax */
1187 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
1188 "ret $4" )
1189
1190 /***********************************************************************
1191 * set_full_cpu_context
1192 *
1193 * Set the new CPU context.
1194 */
1195 extern void set_full_cpu_context( const CONTEXT *context );
1196 __ASM_GLOBAL_FUNC( set_full_cpu_context,
1197 "movl 4(%esp),%ecx\n\t"
1198 "movw 0x8c(%ecx),%gs\n\t" /* SegGs */
1199 "movw 0x90(%ecx),%fs\n\t" /* SegFs */
1200 "movw 0x94(%ecx),%es\n\t" /* SegEs */
1201 "movl 0x9c(%ecx),%edi\n\t" /* Edi */
1202 "movl 0xa0(%ecx),%esi\n\t" /* Esi */
1203 "movl 0xa4(%ecx),%ebx\n\t" /* Ebx */
1204 "movl 0xb4(%ecx),%ebp\n\t" /* Ebp */
1205 "movw %ss,%ax\n\t"
1206 "cmpw 0xc8(%ecx),%ax\n\t" /* SegSs */
1207 "jne 1f\n\t"
1208 /* As soon as we have switched stacks the context structure could
1209 * be invalid (when signal handlers are executed for example). Copy
1210 * values on the target stack before changing ESP. */
1211 "movl 0xc4(%ecx),%eax\n\t" /* Esp */
1212 "leal -4*4(%eax),%eax\n\t"
1213 "movl 0xc0(%ecx),%edx\n\t" /* EFlags */
1214 "movl %edx,3*4(%eax)\n\t"
1215 "movl 0xbc(%ecx),%edx\n\t" /* SegCs */
1216 "movl %edx,2*4(%eax)\n\t"
1217 "movl 0xb8(%ecx),%edx\n\t" /* Eip */
1218 "movl %edx,1*4(%eax)\n\t"
1219 "movl 0xb0(%ecx),%edx\n\t" /* Eax */
1220 "movl %edx,0*4(%eax)\n\t"
1221 "pushl 0x98(%ecx)\n\t" /* SegDs */
1222 "movl 0xa8(%ecx),%edx\n\t" /* Edx */
1223 "movl 0xac(%ecx),%ecx\n\t" /* Ecx */
1224 "popl %ds\n\t"
1225 "movl %eax,%esp\n\t"
1226 "popl %eax\n\t"
1227 "iret\n"
1228 /* Restore the context when the stack segment changes. We can't use
1229 * the same code as above because we do not know if the stack segment
1230 * is 16 or 32 bit, and 'movl' will throw an exception when we try to
1231 * access memory above the limit. */
1232 "1:\n\t"
1233 "movl 0xa8(%ecx),%edx\n\t" /* Edx */
1234 "movl 0xb0(%ecx),%eax\n\t" /* Eax */
1235 "movw 0xc8(%ecx),%ss\n\t" /* SegSs */
1236 "movl 0xc4(%ecx),%esp\n\t" /* Esp */
1237 "pushl 0xc0(%ecx)\n\t" /* EFlags */
1238 "pushl 0xbc(%ecx)\n\t" /* SegCs */
1239 "pushl 0xb8(%ecx)\n\t" /* Eip */
1240 "pushl 0x98(%ecx)\n\t" /* SegDs */
1241 "movl 0xac(%ecx),%ecx\n\t" /* Ecx */
1242 "popl %ds\n\t"
1243 "iret" )
1244
1245
1246 /***********************************************************************
1247 * set_cpu_context
1248 *
1249 * Set the new CPU context. Used by NtSetContextThread.
1250 */
1251 void DECLSPEC_HIDDEN set_cpu_context( const CONTEXT *context )
1252 {
1253 DWORD flags = context->ContextFlags & ~CONTEXT_i386;
1254
1255 if ((flags & CONTEXT_EXTENDED_REGISTERS) && has_fpux()) restore_fpux( context );
1256 else if (flags & CONTEXT_FLOATING_POINT) restore_fpu( context );
1257
1258 if (flags & CONTEXT_DEBUG_REGISTERS)
1259 {
1260 x86_thread_data()->dr0 = context->Dr0;
1261 x86_thread_data()->dr1 = context->Dr1;
1262 x86_thread_data()->dr2 = context->Dr2;
1263 x86_thread_data()->dr3 = context->Dr3;
1264 x86_thread_data()->dr6 = context->Dr6;
1265 x86_thread_data()->dr7 = context->Dr7;
1266 }
1267 if (flags & CONTEXT_FULL)
1268 {
1269 if (!(flags & CONTEXT_CONTROL))
1270 FIXME( "setting partial context (%x) not supported\n", flags );
1271 else if (flags & CONTEXT_SEGMENTS)
1272 set_full_cpu_context( context );
1273 else
1274 {
1275 CONTEXT newcontext = *context;
1276 newcontext.SegDs = get_ds();
1277 newcontext.SegEs = get_ds();
1278 newcontext.SegFs = get_fs();
1279 newcontext.SegGs = get_gs();
1280 set_full_cpu_context( &newcontext );
1281 }
1282 }
1283 }
1284
1285
1286 /***********************************************************************
1287 * get_server_context_flags
1288 *
1289 * Convert CPU-specific flags to generic server flags
1290 */
1291 static unsigned int get_server_context_flags( DWORD flags )
1292 {
1293 unsigned int ret = 0;
1294
1295 flags &= ~CONTEXT_i386; /* get rid of CPU id */
1296 if (flags & CONTEXT_CONTROL) ret |= SERVER_CTX_CONTROL;
1297 if (flags & CONTEXT_INTEGER) ret |= SERVER_CTX_INTEGER;
1298 if (flags & CONTEXT_SEGMENTS) ret |= SERVER_CTX_SEGMENTS;
1299 if (flags & CONTEXT_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT;
1300 if (flags & CONTEXT_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS;
1301 if (flags & CONTEXT_EXTENDED_REGISTERS) ret |= SERVER_CTX_EXTENDED_REGISTERS;
1302 return ret;
1303 }
1304
1305
1306 /***********************************************************************
1307 * context_to_server
1308 *
1309 * Convert a register context to the server format.
1310 */
1311 NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
1312 {
1313 DWORD flags = from->ContextFlags & ~CONTEXT_i386; /* get rid of CPU id */
1314
1315 memset( to, 0, sizeof(*to) );
1316 to->cpu = CPU_x86;
1317
1318 if (flags & CONTEXT_CONTROL)
1319 {
1320 to->flags |= SERVER_CTX_CONTROL;
1321 to->ctl.i386_regs.ebp = from->Ebp;
1322 to->ctl.i386_regs.esp = from->Esp;
1323 to->ctl.i386_regs.eip = from->Eip;
1324 to->ctl.i386_regs.cs = from->SegCs;
1325 to->ctl.i386_regs.ss = from->SegSs;
1326 to->ctl.i386_regs.eflags = from->EFlags;
1327 }
1328 if (flags & CONTEXT_INTEGER)
1329 {
1330 to->flags |= SERVER_CTX_INTEGER;
1331 to->integer.i386_regs.eax = from->Eax;
1332 to->integer.i386_regs.ebx = from->Ebx;
1333 to->integer.i386_regs.ecx = from->Ecx;
1334 to->integer.i386_regs.edx = from->Edx;
1335 to->integer.i386_regs.esi = from->Esi;
1336 to->integer.i386_regs.edi = from->Edi;
1337 }
1338 if (flags & CONTEXT_SEGMENTS)
1339 {
1340 to->flags |= SERVER_CTX_SEGMENTS;
1341 to->seg.i386_regs.ds = from->SegDs;
1342 to->seg.i386_regs.es = from->SegEs;
1343 to->seg.i386_regs.fs = from->SegFs;
1344 to->seg.i386_regs.gs = from->SegGs;
1345 }
1346 if (flags & CONTEXT_FLOATING_POINT)
1347 {
1348 to->flags |= SERVER_CTX_FLOATING_POINT;
1349 to->fp.i386_regs.ctrl = from->FloatSave.ControlWord;
1350 to->fp.i386_regs.status = from->FloatSave.StatusWord;
1351 to->fp.i386_regs.tag = from->FloatSave.TagWord;
1352 to->fp.i386_regs.err_off = from->FloatSave.ErrorOffset;
1353 to->fp.i386_regs.err_sel = from->FloatSave.ErrorSelector;
1354 to->fp.i386_regs.data_off = from->FloatSave.DataOffset;
1355 to->fp.i386_regs.data_sel = from->FloatSave.DataSelector;
1356 to->fp.i386_regs.cr0npx = from->FloatSave.Cr0NpxState;
1357 memcpy( to->fp.i386_regs.regs, from->FloatSave.RegisterArea, sizeof(to->fp.i386_regs.regs) );
1358 }
1359 if (flags & CONTEXT_DEBUG_REGISTERS)
1360 {
1361 to->flags |= SERVER_CTX_DEBUG_REGISTERS;
1362 to->debug.i386_regs.dr0 = from->Dr0;
1363 to->debug.i386_regs.dr1 = from->Dr1;
1364 to->debug.i386_regs.dr2 = from->Dr2;
1365 to->debug.i386_regs.dr3 = from->Dr3;
1366 to->debug.i386_regs.dr6 = from->Dr6;
1367 to->debug.i386_regs.dr7 = from->Dr7;
1368 }
1369 if (flags & CONTEXT_EXTENDED_REGISTERS)
1370 {
1371 to->flags |= SERVER_CTX_EXTENDED_REGISTERS;
1372 memcpy( to->ext.i386_regs, from->ExtendedRegisters, sizeof(to->ext.i386_regs) );
1373 }
1374 return STATUS_SUCCESS;
1375 }
1376
1377
1378 /***********************************************************************
1379 * context_from_server
1380 *
1381 * Convert a register context from the server format.
1382 */
1383 NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
1384 {
1385 if (from->cpu != CPU_x86) return STATUS_INVALID_PARAMETER;
1386
1387 to->ContextFlags = CONTEXT_i386;
1388 if (from->flags & SERVER_CTX_CONTROL)
1389 {
1390 to->ContextFlags |= CONTEXT_CONTROL;
1391 to->Ebp = from->ctl.i386_regs.ebp;
1392 to->Esp = from->ctl.i386_regs.esp;
1393 to->Eip = from->ctl.i386_regs.eip;
1394 to->SegCs = from->ctl.i386_regs.cs;
1395 to->SegSs = from->ctl.i386_regs.ss;
1396 to->EFlags = from->ctl.i386_regs.eflags;
1397 }
1398 if (from->flags & SERVER_CTX_INTEGER)
1399 {
1400 to->ContextFlags |= CONTEXT_INTEGER;
1401 to->Eax = from->integer.i386_regs.eax;
1402 to->Ebx = from->integer.i386_regs.ebx;
1403 to->Ecx = from->integer.i386_regs.ecx;
1404 to->Edx = from->integer.i386_regs.edx;
1405 to->Esi = from->integer.i386_regs.esi;
1406 to->Edi = from->integer.i386_regs.edi;
1407 }
1408 if (from->flags & SERVER_CTX_SEGMENTS)
1409 {
1410 to->ContextFlags |= CONTEXT_SEGMENTS;
1411 to->SegDs = from->seg.i386_regs.ds;
1412 to->SegEs = from->seg.i386_regs.es;
1413 to->SegFs = from->seg.i386_regs.fs;
1414 to->SegGs = from->seg.i386_regs.gs;
1415 }
1416 if (from->flags & SERVER_CTX_FLOATING_POINT)
1417 {
1418 to->ContextFlags |= CONTEXT_FLOATING_POINT;
1419 to->FloatSave.ControlWord = from->fp.i386_regs.ctrl;
1420 to->FloatSave.StatusWord = from->fp.i386_regs.status;
1421 to->FloatSave.TagWord = from->fp.i386_regs.tag;
1422 to->FloatSave.ErrorOffset = from->fp.i386_regs.err_off;
1423 to->FloatSave.ErrorSelector = from->fp.i386_regs.err_sel;
1424 to->FloatSave.DataOffset = from->fp.i386_regs.data_off;
1425 to->FloatSave.DataSelector = from->fp.i386_regs.data_sel;
1426 to->FloatSave.Cr0NpxState = from->fp.i386_regs.cr0npx;
1427 memcpy( to->FloatSave.RegisterArea, from->fp.i386_regs.regs, sizeof(to->FloatSave.RegisterArea) );
1428 }
1429 if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
1430 {
1431 to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
1432 to->Dr0 = from->debug.i386_regs.dr0;
1433 to->Dr1 = from->debug.i386_regs.dr1;
1434 to->Dr2 = from->debug.i386_regs.dr2;
1435 to->Dr3 = from->debug.i386_regs.dr3;
1436 to->Dr6 = from->debug.i386_regs.dr6;
1437 to->Dr7 = from->debug.i386_regs.dr7;
1438 }
1439 if (from->flags & SERVER_CTX_EXTENDED_REGISTERS)
1440 {
1441 to->ContextFlags |= CONTEXT_EXTENDED_REGISTERS;
1442 memcpy( to->ExtendedRegisters, from->ext.i386_regs, sizeof(to->ExtendedRegisters) );
1443 }
1444 return STATUS_SUCCESS;
1445 }
1446
1447
1448 /***********************************************************************
1449 * NtSetContextThread (NTDLL.@)
1450 * ZwSetContextThread (NTDLL.@)
1451 */
1452 NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
1453 {
1454 NTSTATUS ret = STATUS_SUCCESS;
1455 BOOL self = (handle == GetCurrentThread());
1456
1457 /* debug registers require a server call */
1458 if (self && (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386)))
1459 self = (x86_thread_data()->dr0 == context->Dr0 &&
1460 x86_thread_data()->dr1 == context->Dr1 &&
1461 x86_thread_data()->dr2 == context->Dr2 &&
1462 x86_thread_data()->dr3 == context->Dr3 &&
1463 x86_thread_data()->dr6 == context->Dr6 &&
1464 x86_thread_data()->dr7 == context->Dr7);
1465
1466 if (!self)
1467 {
1468 context_t server_context;
1469 context_to_server( &server_context, context );
1470 ret = set_thread_context( handle, &server_context, &self );
1471 }
1472
1473 if (self && ret == STATUS_SUCCESS) set_cpu_context( context );
1474 return ret;
1475 }
1476
1477
1478 /***********************************************************************
1479 * NtGetContextThread (NTDLL.@)
1480 * ZwGetContextThread (NTDLL.@)
1481 *
1482 * Note: we use a small assembly wrapper to save the necessary registers
1483 * in case we are fetching the context of the current thread.
1484 */
1485 NTSTATUS CDECL DECLSPEC_HIDDEN __regs_NtGetContextThread( DWORD edi, DWORD esi, DWORD ebx, DWORD eflags,
1486 DWORD ebp, DWORD retaddr, HANDLE handle,
1487 CONTEXT *context )
1488 {
1489 NTSTATUS ret;
1490 DWORD needed_flags = context->ContextFlags & ~CONTEXT_i386;
1491 BOOL self = (handle == GetCurrentThread());
1492
1493 /* debug registers require a server call */
1494 if (needed_flags & CONTEXT_DEBUG_REGISTERS) self = FALSE;
1495
1496 if (!self)
1497 {
1498 context_t server_context;
1499 unsigned int server_flags = get_server_context_flags( context->ContextFlags );
1500
1501 if ((ret = get_thread_context( handle, &server_context, server_flags, &self ))) return ret;
1502 if ((ret = context_from_server( context, &server_context ))) return ret;
1503 needed_flags &= ~context->ContextFlags;
1504 }
1505
1506 if (self)
1507 {
1508 if (needed_flags & CONTEXT_INTEGER)
1509 {
1510 context->Eax = 0;
1511 context->Ebx = ebx;
1512 context->Ecx = 0;
1513 context->Edx = 0;
1514 context->Esi = esi;
1515 context->Edi = edi;
1516 context->ContextFlags |= CONTEXT_INTEGER;
1517 }
1518 if (needed_flags & CONTEXT_CONTROL)
1519 {
1520 context->Ebp = ebp;
1521 context->Esp = (DWORD)&retaddr;
1522 context->Eip = *(&edi - 1);
1523 context->SegCs = get_cs();
1524 context->SegSs = get_ds();
1525 context->EFlags = eflags;
1526 context->ContextFlags |= CONTEXT_CONTROL;
1527 }
1528 if (needed_flags & CONTEXT_SEGMENTS)
1529 {
1530 context->SegDs = get_ds();
1531 context->SegEs = get_ds();
1532 context->SegFs = get_fs();
1533 context->SegGs = get_gs();
1534 context->ContextFlags |= CONTEXT_SEGMENTS;
1535 }
1536 if (needed_flags & CONTEXT_FLOATING_POINT) save_fpu( context );
1537 if (needed_flags & CONTEXT_EXTENDED_REGISTERS) save_fpux( context );
1538 /* FIXME: xstate */
1539 /* update the cached version of the debug registers */
1540 if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386))
1541 {
1542 x86_thread_data()->dr0 = context->Dr0;
1543 x86_thread_data()->dr1 = context->Dr1;
1544 x86_thread_data()->dr2 = context->Dr2;
1545 x86_thread_data()->dr3 = context->Dr3;
1546 x86_thread_data()->dr6 = context->Dr6;
1547 x86_thread_data()->dr7 = context->Dr7;
1548 }
1549 }
1550
1551 if (context->ContextFlags & (CONTEXT_INTEGER & ~CONTEXT_i386))
1552 TRACE( "%p: eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n", handle,
1553 context->Eax, context->Ebx, context->Ecx, context->Edx, context->Esi, context->Edi );
1554 if (context->ContextFlags & (CONTEXT_CONTROL & ~CONTEXT_i386))
1555 TRACE( "%p: ebp=%08x esp=%08x eip=%08x cs=%04x ss=%04x flags=%08x\n", handle,
1556 context->Ebp, context->Esp, context->Eip, context->SegCs, context->SegSs, context->EFlags );
1557 if (context->ContextFlags & (CONTEXT_SEGMENTS & ~CONTEXT_i386))
1558 TRACE( "%p: ds=%04x es=%04x fs=%04x gs=%04x\n", handle,
1559 context->SegDs, context->SegEs, context->SegFs, context->SegGs );
1560 if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386))
1561 TRACE( "%p: dr0=%08x dr1=%08x dr2=%08x dr3=%08x dr6=%08x dr7=%08x\n", handle,
1562 context->Dr0, context->Dr1, context->Dr2, context->Dr3, context->Dr6, context->Dr7 );
1563
1564 return STATUS_SUCCESS;
1565 }
1566 __ASM_STDCALL_FUNC( NtGetContextThread, 8,
1567 "pushl %ebp\n\t"
1568 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
1569 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
1570 "movl %esp,%ebp\n\t"
1571 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
1572 "pushfl\n\t"
1573 "pushl %ebx\n\t"
1574 __ASM_CFI(".cfi_rel_offset %ebx,-8\n\t")
1575 "pushl %esi\n\t"
1576 __ASM_CFI(".cfi_rel_offset %esi,-12\n\t")
1577 "pushl %edi\n\t"
1578 __ASM_CFI(".cfi_rel_offset %edi,-16\n\t")
1579 "call " __ASM_NAME("__regs_NtGetContextThread") "\n\t"
1580 "leave\n\t"
1581 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
1582 __ASM_CFI(".cfi_same_value %ebp\n\t")
1583 "ret $8" )
1584
1585
1586 /***********************************************************************
1587 * is_privileged_instr
1588 *
1589 * Check if the fault location is a privileged instruction.
1590 * Based on the instruction emulation code in dlls/kernel/instr.c.
1591 */
1592 static inline DWORD is_privileged_instr( CONTEXT *context )
1593 {
1594 BYTE instr[16];
1595 unsigned int i, len, prefix_count = 0;
1596
1597 if (!ldt_is_system( context->SegCs )) return 0;
1598 len = virtual_uninterrupted_read_memory( (BYTE *)context->Eip, instr, sizeof(instr) );
1599
1600 for (i = 0; i < len; i++) switch (instr[i])
1601 {
1602 /* instruction prefixes */
1603 case 0x2e: /* %cs: */
1604 case 0x36: /* %ss: */
1605 case 0x3e: /* %ds: */
1606 case 0x26: /* %es: */
1607 case 0x64: /* %fs: */
1608 case 0x65: /* %gs: */
1609 case 0x66: /* opcode size */
1610 case 0x67: /* addr size */
1611 case 0xf0: /* lock */
1612 case 0xf2: /* repne */
1613 case 0xf3: /* repe */
1614 if (++prefix_count >= 15) return EXCEPTION_ILLEGAL_INSTRUCTION;
1615 continue;
1616
1617 case 0x0f: /* extended instruction */
1618 if (i == len - 1) return 0;
1619 switch(instr[i + 1])
1620 {
1621 case 0x20: /* mov crX, reg */
1622 case 0x21: /* mov drX, reg */
1623 case 0x22: /* mov reg, crX */
1624 case 0x23: /* mov reg drX */
1625 return EXCEPTION_PRIV_INSTRUCTION;
1626 }
1627 return 0;
1628 case 0x6c: /* insb (%dx) */
1629 case 0x6d: /* insl (%dx) */
1630 case 0x6e: /* outsb (%dx) */
1631 case 0x6f: /* outsl (%dx) */
1632 case 0xcd: /* int $xx */
1633 case 0xe4: /* inb al,XX */
1634 case 0xe5: /* in (e)ax,XX */
1635 case 0xe6: /* outb XX,al */
1636 case 0xe7: /* out XX,(e)ax */
1637 case 0xec: /* inb (%dx),%al */
1638 case 0xed: /* inl (%dx),%eax */
1639 case 0xee: /* outb %al,(%dx) */
1640 case 0xef: /* outl %eax,(%dx) */
1641 case 0xf4: /* hlt */
1642 case 0xfa: /* cli */
1643 case 0xfb: /* sti */
1644 return EXCEPTION_PRIV_INSTRUCTION;
1645 default:
1646 return 0;
1647 }
1648 return 0;
1649 }
1650
1651
1652 /***********************************************************************
1653 * check_invalid_gs
1654 *
1655 * Check for fault caused by invalid %gs value (some copy protection schemes mess with it).
1656 */
1657 static inline BOOL check_invalid_gs( ucontext_t *sigcontext, CONTEXT *context )
1658 {
1659 unsigned int prefix_count = 0;
1660 const BYTE *instr = (BYTE *)context->Eip;
1661 WORD system_gs = x86_thread_data()->gs;
1662
1663 if (context->SegGs == system_gs) return FALSE;
1664 if (!ldt_is_system( context->SegCs )) return FALSE;
1665 /* only handle faults in system libraries */
1666 if (virtual_is_valid_code_address( instr, 1 )) return FALSE;
1667
1668 for (;;) switch(*instr)
1669 {
1670 /* instruction prefixes */
1671 case 0x2e: /* %cs: */
1672 case 0x36: /* %ss: */
1673 case 0x3e: /* %ds: */
1674 case 0x26: /* %es: */
1675 case 0x64: /* %fs: */
1676 case 0x66: /* opcode size */
1677 case 0x67: /* addr size */
1678 case 0xf0: /* lock */
1679 case 0xf2: /* repne */
1680 case 0xf3: /* repe */
1681 if (++prefix_count >= 15) return FALSE;
1682 instr++;
1683 continue;
1684 case 0x65: /* %gs: */
1685 TRACE( "%04x/%04x at %p, fixing up\n", context->SegGs, system_gs, instr );
1686 #ifdef GS_sig
1687 GS_sig(sigcontext) = system_gs;
1688 #endif
1689 return TRUE;
1690 default:
1691 return FALSE;
1692 }
1693 }
1694
1695
1696 #include "pshpack1.h"
1697 union atl_thunk
1698 {
1699 struct
1700 {
1701 DWORD movl; /* movl this,4(%esp) */
1702 DWORD this;
1703 BYTE jmp; /* jmp func */
1704 int func;
1705 } t1;
1706 struct
1707 {
1708 BYTE movl; /* movl this,ecx */
1709 DWORD this;
1710 BYTE jmp; /* jmp func */
1711 int func;
1712 } t2;
1713 struct
1714 {
1715 BYTE movl1; /* movl this,edx */
1716 DWORD this;
1717 BYTE movl2; /* movl func,ecx */
1718 DWORD func;
1719 WORD jmp; /* jmp ecx */
1720 } t3;
1721 struct
1722 {
1723 BYTE movl1; /* movl this,ecx */
1724 DWORD this;
1725 BYTE movl2; /* movl func,eax */
1726 DWORD func;
1727 WORD jmp; /* jmp eax */
1728 } t4;
1729 struct
1730 {
1731 DWORD inst1; /* pop ecx
1732 * pop eax
1733 * push ecx
1734 * jmp 4(%eax) */
1735 WORD inst2;
1736 } t5;
1737 };
1738 #include "poppack.h"
1739
1740 /**********************************************************************
1741 * check_atl_thunk
1742 *
1743 * Check if code destination is an ATL thunk, and emulate it if so.
1744 */
1745 static BOOL check_atl_thunk( ucontext_t *sigcontext, struct stack_layout *stack )
1746 {
1747 const union atl_thunk *thunk = (const union atl_thunk *)stack->rec.ExceptionInformation[1];
1748 union atl_thunk thunk_copy;
1749 SIZE_T thunk_len;
1750
1751 thunk_len = virtual_uninterrupted_read_memory( thunk, &thunk_copy, sizeof(*thunk) );
1752 if (!thunk_len) return FALSE;
1753
1754 if (thunk_len >= sizeof(thunk_copy.t1) && thunk_copy.t1.movl == 0x042444c7 &&
1755 thunk_copy.t1.jmp == 0xe9)
1756 {
1757 if (!virtual_uninterrupted_write_memory( (DWORD *)stack->context.Esp + 1,
1758 &thunk_copy.t1.this, sizeof(DWORD) ))
1759 {
1760 EIP_sig(sigcontext) = (DWORD_PTR)(&thunk->t1.func + 1) + thunk_copy.t1.func;
1761 TRACE( "emulating ATL thunk type 1 at %p, func=%08x arg=%08x\n",
1762 thunk, EIP_sig(sigcontext), thunk_copy.t1.this );
1763 return TRUE;
1764 }
1765 }
1766 else if (thunk_len >= sizeof(thunk_copy.t2) && thunk_copy.t2.movl == 0xb9 &&
1767 thunk_copy.t2.jmp == 0xe9)
1768 {
1769 ECX_sig(sigcontext) = thunk_copy.t2.this;
1770 EIP_sig(sigcontext) = (DWORD_PTR)(&thunk->t2.func + 1) + thunk_copy.t2.func;
1771 TRACE( "emulating ATL thunk type 2 at %p, func=%08x ecx=%08x\n",
1772 thunk, EIP_sig(sigcontext), ECX_sig(sigcontext) );
1773 return TRUE;
1774 }
1775 else if (thunk_len >= sizeof(thunk_copy.t3) && thunk_copy.t3.movl1 == 0xba &&
1776 thunk_copy.t3.movl2 == 0xb9 &&
1777 thunk_copy.t3.jmp == 0xe1ff)
1778 {
1779 EDX_sig(sigcontext) = thunk_copy.t3.this;
1780 ECX_sig(sigcontext) = thunk_copy.t3.func;
1781 EIP_sig(sigcontext) = thunk_copy.t3.func;
1782 TRACE( "emulating ATL thunk type 3 at %p, func=%08x ecx=%08x edx=%08x\n",
1783 thunk, EIP_sig(sigcontext), ECX_sig(sigcontext), EDX_sig(sigcontext) );
1784 return TRUE;
1785 }
1786 else if (thunk_len >= sizeof(thunk_copy.t4) && thunk_copy.t4.movl1 == 0xb9 &&
1787 thunk_copy.t4.movl2 == 0xb8 &&
1788 thunk_copy.t4.jmp == 0xe0ff)
1789 {
1790 ECX_sig(sigcontext) = thunk_copy.t4.this;
1791 EAX_sig(sigcontext) = thunk_copy.t4.func;
1792 EIP_sig(sigcontext) = thunk_copy.t4.func;
1793 TRACE( "emulating ATL thunk type 4 at %p, func=%08x eax=%08x ecx=%08x\n",
1794 thunk, EIP_sig(sigcontext), EAX_sig(sigcontext), ECX_sig(sigcontext) );
1795 return TRUE;
1796 }
1797 else if (thunk_len >= sizeof(thunk_copy.t5) && thunk_copy.t5.inst1 == 0xff515859 &&
1798 thunk_copy.t5.inst2 == 0x0460)
1799 {
1800 DWORD func, sp[2];
1801 if (virtual_uninterrupted_read_memory( (DWORD *)stack->context.Esp, sp, sizeof(sp) ) == sizeof(sp) &&
1802 virtual_uninterrupted_read_memory( (DWORD *)sp[1] + 1, &func, sizeof(DWORD) ) == sizeof(DWORD) &&
1803 !virtual_uninterrupted_write_memory( (DWORD *)stack->context.Esp + 1, &sp[0], sizeof(sp[0]) ))
1804 {
1805 ECX_sig(sigcontext) = sp[0];
1806 EAX_sig(sigcontext) = sp[1];
1807 ESP_sig(sigcontext) += sizeof(DWORD);
1808 EIP_sig(sigcontext) = func;
1809 TRACE( "emulating ATL thunk type 5 at %p, func=%08x eax=%08x ecx=%08x esp=%08x\n",
1810 thunk, EIP_sig(sigcontext), EAX_sig(sigcontext),
1811 ECX_sig(sigcontext), ESP_sig(sigcontext) );
1812 return TRUE;
1813 }
1814 }
1815
1816 return FALSE;
1817 }
1818
1819
1820 /***********************************************************************
1821 * setup_exception_record
1822 *
1823 * Setup the exception record and context on the thread stack.
1824 */
1825 static struct stack_layout *setup_exception_record( ucontext_t *sigcontext, void *stack_ptr,
1826 WORD fs, WORD gs )
1827 {
1828 struct stack_layout *stack = stack_ptr;
1829 DWORD exception_code = 0;
1830
1831 /* stack sanity checks */
1832
1833 if ((char *)stack >= (char *)get_signal_stack() &&
1834 (char *)stack < (char *)get_signal_stack() + signal_stack_size)
1835 {
1836 WINE_ERR( "nested exception on signal stack in thread %04x eip %08x esp %08x stack %p-%p\n",
1837 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1838 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit,
1839 NtCurrentTeb()->Tib.StackBase );
1840 abort_thread(1);
1841 }
1842
1843 if (stack - 1 > stack || /* check for overflow in subtraction */
1844 (char *)stack <= (char *)NtCurrentTeb()->DeallocationStack ||
1845 (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase)
1846 {
1847 WARN( "exception outside of stack limits in thread %04x eip %08x esp %08x stack %p-%p\n",
1848 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1849 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit,
1850 NtCurrentTeb()->Tib.StackBase );
1851 }
1852 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->DeallocationStack + 4096)
1853 {
1854 /* stack overflow on last page, unrecoverable */
1855 UINT diff = (char *)NtCurrentTeb()->DeallocationStack + 4096 - (char *)(stack - 1);
1856 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1857 diff, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1858 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1859 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1860 abort_thread(1);
1861 }
1862 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit)
1863 {
1864 /* stack access below stack limit, may be recoverable */
1865 switch (virtual_handle_stack_fault( stack - 1 ))
1866 {
1867 case 0: /* not handled */
1868 {
1869 UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)(stack - 1);
1870 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1871 diff, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1872 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1873 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1874 abort_thread(1);
1875 }
1876 case -1: /* overflow */
1877 exception_code = EXCEPTION_STACK_OVERFLOW;
1878 break;
1879 }
1880 }
1881
1882 stack--; /* push the stack_layout structure */
1883 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
1884 VALGRIND_MAKE_MEM_UNDEFINED(stack, sizeof(*stack));
1885 #elif defined(VALGRIND_MAKE_WRITABLE)
1886 VALGRIND_MAKE_WRITABLE(stack, sizeof(*stack));
1887 #endif
1888 stack->rec.ExceptionRecord = NULL;
1889 stack->rec.ExceptionCode = exception_code;
1890 stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
1891 stack->rec.ExceptionAddress = (LPVOID)EIP_sig(sigcontext);
1892 stack->rec.NumberParameters = 0;
1893
1894 save_context( &stack->context, sigcontext, fs, gs );
1895 return stack;
1896 }
1897
1898
1899 /***********************************************************************
1900 * setup_exception
1901 *
1902 * Setup a proper stack frame for the raise function, and modify the
1903 * sigcontext so that the return from the signal handler will call
1904 * the raise function.
1905 */
1906 static struct stack_layout *setup_exception( ucontext_t *sigcontext )
1907 {
1908 WORD fs, gs;
1909 void *stack = init_handler( sigcontext, &fs, &gs );
1910
1911 return setup_exception_record( sigcontext, stack, fs, gs );
1912 }
1913
1914
1915 /**********************************************************************
1916 * raise_generic_exception
1917 *
1918 * Generic raise function for exceptions that don't need special treatment.
1919 */
1920 static void WINAPI raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1921 {
1922 NTSTATUS status;
1923
1924 status = raise_exception( rec, context, TRUE );
1925 raise_status( status, rec );
1926 }
1927
1928
1929 /***********************************************************************
1930 * setup_raise_exception
1931 *
1932 * Change context to setup a call to a raise exception function.
1933 */
1934 static void setup_raise_exception( ucontext_t *sigcontext, struct stack_layout *stack )
1935 {
1936 NTSTATUS status = send_debug_event( &stack->rec, TRUE, &stack->context );
1937
1938 if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
1939 {
1940 restore_context( &stack->context, sigcontext );
1941 return;
1942 }
1943 ESP_sig(sigcontext) = (DWORD)stack;
1944 EIP_sig(sigcontext) = (DWORD)raise_generic_exception;
1945 /* clear single-step, direction, and align check flag */
1946 EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000);
1947 CS_sig(sigcontext) = get_cs();
1948 DS_sig(sigcontext) = get_ds();
1949 ES_sig(sigcontext) = get_ds();
1950 FS_sig(sigcontext) = get_fs();
1951 GS_sig(sigcontext) = get_gs();
1952 SS_sig(sigcontext) = get_ds();
1953 stack->ret_addr = (void *)0xdeadbabe; /* raise_generic_exception must not return */
1954 stack->rec_ptr = &stack->rec; /* arguments for raise_generic_exception */
1955 stack->context_ptr = &stack->context;
1956 }
1957
1958
1959 /**********************************************************************
1960 * get_fpu_code
1961 *
1962 * Get the FPU exception code from the FPU status.
1963 */
1964 static inline DWORD get_fpu_code( const CONTEXT *context )
1965 {
1966 DWORD status = context->FloatSave.StatusWord & ~(context->FloatSave.ControlWord & 0x3f);
1967
1968 if (status & 0x01) /* IE */
1969 {
1970 if (status & 0x40) /* SF */
1971 return EXCEPTION_FLT_STACK_CHECK;
1972 else
1973 return EXCEPTION_FLT_INVALID_OPERATION;
1974 }
1975 if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
1976 if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
1977 if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
1978 if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
1979 if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
1980 return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
1981 }
1982
1983
1984 /***********************************************************************
1985 * handle_interrupt
1986 *
1987 * Handle an interrupt.
1988 */
1989 static BOOL handle_interrupt( unsigned int interrupt, ucontext_t *sigcontext, struct stack_layout *stack )
1990 {
1991 switch(interrupt)
1992 {
1993 case 0x2d:
1994 if (!is_wow64)
1995 {
1996 /* On Wow64, the upper DWORD of Rax contains garbage, and the debug
1997 * service is usually not recognized when called from usermode. */
1998 switch (stack->context.Eax)
1999 {
2000 case 1: /* BREAKPOINT_PRINT */
2001 case 3: /* BREAKPOINT_LOAD_SYMBOLS */
2002 case 4: /* BREAKPOINT_UNLOAD_SYMBOLS */
2003 case 5: /* BREAKPOINT_COMMAND_STRING (>= Win2003) */
2004 EIP_sig(sigcontext) += 3;
2005 return TRUE;
2006 }
2007 }
2008 stack->context.Eip += 3;
2009 stack->rec.ExceptionCode = EXCEPTION_BREAKPOINT;
2010 stack->rec.ExceptionAddress = (void *)stack->context.Eip;
2011 stack->rec.NumberParameters = is_wow64 ? 1 : 3;
2012 stack->rec.ExceptionInformation[0] = stack->context.Eax;
2013 stack->rec.ExceptionInformation[1] = stack->context.Ecx;
2014 stack->rec.ExceptionInformation[2] = stack->context.Edx;
2015 setup_raise_exception( sigcontext, stack );
2016 return TRUE;
2017 default:
2018 return FALSE;
2019 }
2020 }
2021
2022
2023 /**********************************************************************
2024 * segv_handler
2025 *
2026 * Handler for SIGSEGV and related errors.
2027 */
2028 static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2029 {
2030 WORD fs, gs;
2031 struct stack_layout *stack;
2032 ucontext_t *context = sigcontext;
2033 void *stack_ptr = init_handler( sigcontext, &fs, &gs );
2034
2035 /* check for exceptions on the signal stack caused by write watches */
2036 if (get_trap_code(context) == TRAP_x86_PAGEFLT &&
2037 (char *)stack_ptr >= (char *)get_signal_stack() &&
2038 (char *)stack_ptr < (char *)get_signal_stack() + signal_stack_size &&
2039 !virtual_handle_fault( siginfo->si_addr, (get_error_code(context) >> 1) & 0x09, TRUE ))
2040 {
2041 return;
2042 }
2043
2044 /* check for page fault inside the thread stack */
2045 if (get_trap_code(context) == TRAP_x86_PAGEFLT)
2046 {
2047 switch (virtual_handle_stack_fault( siginfo->si_addr ))
2048 {
2049 case 1: /* handled */
2050 return;
2051 case -1: /* overflow */
2052 stack = setup_exception_record( context, stack_ptr, fs, gs );
2053 stack->rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
2054 goto done;
2055 }
2056 }
2057
2058 stack = setup_exception_record( context, stack_ptr, fs, gs );
2059 if (stack->rec.ExceptionCode == EXCEPTION_STACK_OVERFLOW) goto done;
2060
2061 switch(get_trap_code(context))
2062 {
2063 case TRAP_x86_OFLOW: /* Overflow exception */
2064 stack->rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
2065 break;
2066 case TRAP_x86_BOUND: /* Bound range exception */
2067 stack->rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
2068 break;
2069 case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
2070 stack->rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2071 break;
2072 case TRAP_x86_STKFLT: /* Stack fault */
2073 stack->rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
2074 break;
2075 case TRAP_x86_SEGNPFLT: /* Segment not present exception */
2076 case TRAP_x86_PROTFLT: /* General protection fault */
2077 case TRAP_x86_UNKNOWN: /* Unknown fault code */
2078 {
2079 WORD err = get_error_code(context);
2080 if (!err && (stack->rec.ExceptionCode = is_privileged_instr( &stack->context ))) break;
2081 if ((err & 7) == 2 && handle_interrupt( err >> 3, context, stack )) return;
2082 stack->rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2083 stack->rec.NumberParameters = 2;
2084 stack->rec.ExceptionInformation[0] = 0;
2085 /* if error contains a LDT selector, use that as fault address */
2086 if ((err & 7) == 4 && !ldt_is_system( err | 7 ))
2087 stack->rec.ExceptionInformation[1] = err & ~7;
2088 else
2089 {
2090 stack->rec.ExceptionInformation[1] = 0xffffffff;
2091 if (check_invalid_gs( context, &stack->context )) return;
2092 }
2093 }
2094 break;
2095 case TRAP_x86_PAGEFLT: /* Page fault */
2096 stack->rec.NumberParameters = 2;
2097 stack->rec.ExceptionInformation[0] = (get_error_code(context) >> 1) & 0x09;
2098 stack->rec.ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
2099 stack->rec.ExceptionCode = virtual_handle_fault( (void *)stack->rec.ExceptionInformation[1],
2100 stack->rec.ExceptionInformation[0], FALSE );
2101 if (!stack->rec.ExceptionCode) return;
2102 if (stack->rec.ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
2103 stack->rec.ExceptionInformation[0] == EXCEPTION_EXECUTE_FAULT)
2104 {
2105 ULONG flags;
2106 NtQueryInformationProcess( GetCurrentProcess(), ProcessExecuteFlags,
2107 &flags, sizeof(flags), NULL );
2108 if (!(flags & MEM_EXECUTE_OPTION_DISABLE_THUNK_EMULATION) && check_atl_thunk( context, stack ))
2109 return;
2110
2111 /* send EXCEPTION_EXECUTE_FAULT only if data execution prevention is enabled */
2112 if (!(flags & MEM_EXECUTE_OPTION_DISABLE))
2113 stack->rec.ExceptionInformation[0] = EXCEPTION_READ_FAULT;
2114 }
2115 break;
2116 case TRAP_x86_ALIGNFLT: /* Alignment check exception */
2117 /* FIXME: pass through exception handler first? */
2118 if (stack->context.EFlags & 0x00040000)
2119 {
2120 EFL_sig(context) &= ~0x00040000; /* disable AC flag */
2121 return;
2122 }
2123 stack->rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
2124 break;
2125 default:
2126 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) );
2127 /* fall through */
2128 case TRAP_x86_NMI: /* NMI interrupt */
2129 case TRAP_x86_DNA: /* Device not available exception */
2130 case TRAP_x86_DOUBLEFLT: /* Double fault exception */
2131 case TRAP_x86_TSSFLT: /* Invalid TSS exception */
2132 case TRAP_x86_MCHK: /* Machine check exception */
2133 case TRAP_x86_CACHEFLT: /* Cache flush exception */
2134 stack->rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2135 break;
2136 }
2137 done:
2138 setup_raise_exception( context, stack );
2139 }
2140
2141
2142 /**********************************************************************
2143 * trap_handler
2144 *
2145 * Handler for SIGTRAP.
2146 */
2147 static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2148 {
2149 ucontext_t *context = sigcontext;
2150 struct stack_layout *stack = setup_exception( context );
2151
2152 switch(get_trap_code(context))
2153 {
2154 case TRAP_x86_TRCTRAP: /* Single-step exception */
2155 stack->rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
2156 /* when single stepping can't tell whether this is a hw bp or a
2157 * single step interrupt. try to avoid as much overhead as possible
2158 * and only do a server call if there is any hw bp enabled. */
2159 if (!(stack->context.EFlags & 0x100) || (stack->context.Dr7 & 0xff))
2160 {
2161 /* (possible) hardware breakpoint, fetch the debug registers */
2162 DWORD saved_flags = stack->context.ContextFlags;
2163 stack->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
2164 NtGetContextThread( GetCurrentThread(), &stack->context );
2165 stack->context.ContextFlags |= saved_flags; /* restore flags */
2166 }
2167 stack->context.EFlags &= ~0x100; /* clear single-step flag */
2168 break;
2169 case TRAP_x86_BPTFLT: /* Breakpoint exception */
2170 stack->rec.ExceptionAddress = (char *)stack->rec.ExceptionAddress - 1; /* back up over the int3 instruction */
2171 /* fall through */
2172 default:
2173 stack->rec.ExceptionCode = EXCEPTION_BREAKPOINT;
2174 stack->rec.NumberParameters = is_wow64 ? 1 : 3;
2175 stack->rec.ExceptionInformation[0] = 0;
2176 stack->rec.ExceptionInformation[1] = 0; /* FIXME */
2177 stack->rec.ExceptionInformation[2] = 0; /* FIXME */
2178 break;
2179 }
2180 setup_raise_exception( context, stack );
2181 }
2182
2183
2184 /**********************************************************************
2185 * fpe_handler
2186 *
2187 * Handler for SIGFPE.
2188 */
2189 static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2190 {
2191 ucontext_t *context = sigcontext;
2192 struct stack_layout *stack = setup_exception( context );
2193
2194 switch(get_trap_code(context))
2195 {
2196 case TRAP_x86_DIVIDE: /* Division by zero exception */
2197 stack->rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
2198 break;
2199 case TRAP_x86_FPOPFLT: /* Coprocessor segment overrun */
2200 stack->rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2201 break;
2202 case TRAP_x86_ARITHTRAP: /* Floating point exception */
2203 case TRAP_x86_UNKNOWN: /* Unknown fault code */
2204 stack->rec.ExceptionCode = get_fpu_code( &stack->context );
2205 stack->rec.ExceptionAddress = (LPVOID)stack->context.FloatSave.ErrorOffset;
2206 break;
2207 case TRAP_x86_CACHEFLT: /* SIMD exception */
2208 /* TODO:
2209 * Behaviour only tested for divide-by-zero exceptions
2210 * Check for other SIMD exceptions as well */
2211 if(siginfo->si_code != FPE_FLTDIV && siginfo->si_code != FPE_FLTINV)
2212 FIXME("untested SIMD exception: %#x. Might not work correctly\n",
2213 siginfo->si_code);
2214
2215 stack->rec.ExceptionCode = STATUS_FLOAT_MULTIPLE_TRAPS;
2216 stack->rec.NumberParameters = 1;
2217 /* no idea what meaning is actually behind this but that's what native does */
2218 stack->rec.ExceptionInformation[0] = 0;
2219 break;
2220 default:
2221 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) );
2222 stack->rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2223 break;
2224 }
2225
2226 setup_raise_exception( context, stack );
2227 }
2228
2229
2230 /**********************************************************************
2231 * int_handler
2232 *
2233 * Handler for SIGINT.
2234 *
2235 * FIXME: should not be calling external functions on the signal stack.
2236 */
2237 static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2238 {
2239 WORD fs, gs;
2240 void *stack_ptr = init_handler( sigcontext, &fs, &gs );
2241 if (!dispatch_signal(SIGINT))
2242 {
2243 struct stack_layout *stack = setup_exception_record( sigcontext, stack_ptr, fs, gs );
2244 stack->rec.ExceptionCode = CONTROL_C_EXIT;
2245 setup_raise_exception( sigcontext, stack );
2246 }
2247 }
2248
2249 /**********************************************************************
2250 * abrt_handler
2251 *
2252 * Handler for SIGABRT.
2253 */
2254 static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2255 {
2256 struct stack_layout *stack = setup_exception( sigcontext );
2257 stack->rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
2258 stack->rec.ExceptionFlags = EH_NONCONTINUABLE;
2259 setup_raise_exception( sigcontext, stack );
2260 }
2261
2262
2263 /**********************************************************************
2264 * quit_handler
2265 *
2266 * Handler for SIGQUIT.
2267 */
2268 static void quit_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2269 {
2270 WORD fs, gs;
2271 init_handler( sigcontext, &fs, &gs );
2272 abort_thread(0);
2273 }
2274
2275
2276 /**********************************************************************
2277 * usr1_handler
2278 *
2279 * Handler for SIGUSR1, used to signal a thread that it got suspended.
2280 */
2281 static void usr1_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2282 {
2283 CONTEXT context;
2284 WORD fs, gs;
2285
2286 init_handler( sigcontext, &fs, &gs );
2287 save_context( &context, sigcontext, fs, gs );
2288 wait_suspend( &context );
2289 restore_context( &context, sigcontext );
2290 }
2291
2292
2293 /***********************************************************************
2294 * __wine_set_signal_handler (NTDLL.@)
2295 */
2296 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
2297 {
2298 if (sig >= ARRAY_SIZE(handlers)) return -1;
2299 if (handlers[sig] != NULL) return -2;
2300 handlers[sig] = wsh;
2301 return 0;
2302 }
2303
2304
2305 /***********************************************************************
2306 * LDT support
2307 */
2308
2309 #define LDT_SIZE 8192
2310
2311 #define LDT_FLAGS_DATA 0x13 /* Data segment */
2312 #define LDT_FLAGS_CODE 0x1b /* Code segment */
2313 #define LDT_FLAGS_32BIT 0x40 /* Segment is 32-bit (code or stack) */
2314 #define LDT_FLAGS_ALLOCATED 0x80 /* Segment is allocated */
2315
2316 struct ldt_copy
2317 {
2318 void *base[LDT_SIZE];
2319 unsigned int limit[LDT_SIZE];
2320 unsigned char flags[LDT_SIZE];
2321 } __wine_ldt_copy;
2322
2323 static WORD gdt_fs_sel;
2324
2325 static RTL_CRITICAL_SECTION ldt_section;
2326 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
2327 {
2328 0, 0, &ldt_section,
2329 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
2330 0, 0, { (DWORD_PTR)(__FILE__ ": ldt_section") }
2331 };
2332 static RTL_CRITICAL_SECTION ldt_section = { &critsect_debug, -1, 0, 0, 0, 0 };
2333 static sigset_t ldt_sigset;
2334
2335 static const LDT_ENTRY null_entry;
2336
2337 static void ldt_lock(void)
2338 {
2339 sigset_t sigset;
2340
2341 pthread_sigmask( SIG_BLOCK, &server_block_set, &sigset );
2342 RtlEnterCriticalSection( &ldt_section );
2343 if (ldt_section.RecursionCount == 1) ldt_sigset = sigset;
2344 }
2345
2346 static void ldt_unlock(void)
2347 {
2348 if (ldt_section.RecursionCount == 1)
2349 {
2350 sigset_t sigset = ldt_sigset;
2351 RtlLeaveCriticalSection( &ldt_section );
2352 pthread_sigmask( SIG_SETMASK, &sigset, NULL );
2353 }
2354 else RtlLeaveCriticalSection( &ldt_section );
2355 }
2356
2357 static inline void *ldt_get_base( LDT_ENTRY ent )
2358 {
2359 return (void *)(ent.BaseLow |
2360 (ULONG_PTR)ent.HighWord.Bits.BaseMid << 16 |
2361 (ULONG_PTR)ent.HighWord.Bits.BaseHi << 24);
2362 }
2363
2364 static inline unsigned int ldt_get_limit( LDT_ENTRY ent )
2365 {
2366 unsigned int limit = ent.LimitLow | (ent.HighWord.Bits.LimitHi << 16);
2367 if (ent.HighWord.Bits.Granularity) limit = (limit << 12) | 0xfff;
2368 return limit;
2369 }
2370
2371 static LDT_ENTRY ldt_make_entry( void *base, unsigned int limit, unsigned char flags )
2372 {
2373 LDT_ENTRY entry;
2374
2375 entry.BaseLow = (WORD)(ULONG_PTR)base;
2376 entry.HighWord.Bits.BaseMid = (BYTE)((ULONG_PTR)base >> 16);
2377 entry.HighWord.Bits.BaseHi = (BYTE)((ULONG_PTR)base >> 24);
2378 if ((entry.HighWord.Bits.Granularity = (limit >= 0x100000))) limit >>= 12;
2379 entry.LimitLow = (WORD)limit;
2380 entry.HighWord.Bits.LimitHi = limit >> 16;
2381 entry.HighWord.Bits.Dpl = 3;
2382 entry.HighWord.Bits.Pres = 1;
2383 entry.HighWord.Bits.Type = flags;
2384 entry.HighWord.Bits.Sys = 0;
2385 entry.HighWord.Bits.Reserved_0 = 0;
2386 entry.HighWord.Bits.Default_Big = (flags & LDT_FLAGS_32BIT) != 0;
2387 return entry;
2388 }
2389
2390 static void ldt_set_entry( WORD sel, LDT_ENTRY entry )
2391 {
2392 int index = sel >> 3;
2393
2394 #ifdef linux
2395 struct modify_ldt_s ldt_info = { index };
2396
2397 ldt_info.base_addr = ldt_get_base( entry );
2398 ldt_info.limit = entry.LimitLow | (entry.HighWord.Bits.LimitHi << 16);
2399 ldt_info.seg_32bit = entry.HighWord.Bits.Default_Big;
2400 ldt_info.contents = (entry.HighWord.Bits.Type >> 2) & 3;
2401 ldt_info.read_exec_only = !(entry.HighWord.Bits.Type & 2);
2402 ldt_info.limit_in_pages = entry.HighWord.Bits.Granularity;
2403 ldt_info.seg_not_present = !entry.HighWord.Bits.Pres;
2404 ldt_info.usable = entry.HighWord.Bits.Sys;
2405 if (modify_ldt( 0x11, &ldt_info, sizeof(ldt_info) ) < 0) perror( "modify_ldt" );
2406 #elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__DragonFly__)
2407 /* The kernel will only let us set LDTs with user priority level */
2408 if (entry.HighWord.Bits.Pres && entry.HighWord.Bits.Dpl != 3) entry.HighWord.Bits.Dpl = 3;
2409 if (i386_set_ldt(index, (union descriptor *)&entry, 1) < 0)
2410 {
2411 perror("i386_set_ldt");
2412 fprintf( stderr, "Did you reconfigure the kernel with \"options USER_LDT\"?\n" );
2413 exit(1);
2414 }
2415 #elif defined(__svr4__) || defined(_SCO_DS)
2416 struct ssd ldt_mod;
2417
2418 ldt_mod.sel = sel;
2419 ldt_mod.bo = (unsigned long)ldt_get_base( entry );
2420 ldt_mod.ls = entry.LimitLow | (entry.HighWord.Bits.LimitHi << 16);
2421 ldt_mod.acc1 = entry.HighWord.Bytes.Flags1;
2422 ldt_mod.acc2 = entry.HighWord.Bytes.Flags2 >> 4;
2423 if (sysi86(SI86DSCR, &ldt_mod) == -1) perror("sysi86");
2424 #elif defined(__APPLE__)
2425 if (i386_set_ldt(index, (union ldt_entry *)&entry, 1) < 0) perror("i386_set_ldt");
2426 #elif defined(__GNU__)
2427 if (i386_set_ldt(mach_thread_self(), sel, (descriptor_list_t)&entry, 1) != KERN_SUCCESS)
2428 perror("i386_set_ldt");
2429 #else
2430 fprintf( stderr, "No LDT support on this platform\n" );
2431 exit(1);
2432 #endif
2433
2434 __wine_ldt_copy.base[index] = ldt_get_base( entry );
2435 __wine_ldt_copy.limit[index] = ldt_get_limit( entry );
2436 __wine_ldt_copy.flags[index] = (entry.HighWord.Bits.Type |
2437 (entry.HighWord.Bits.Default_Big ? LDT_FLAGS_32BIT : 0) |
2438 LDT_FLAGS_ALLOCATED);
2439 }
2440
2441 static void ldt_init(void)
2442 {
2443 #ifdef __linux__
2444 /* the preloader may have allocated it already */
2445 gdt_fs_sel = get_fs();
2446 if (!gdt_fs_sel || !is_gdt_sel( gdt_fs_sel ))
2447 {
2448 struct modify_ldt_s ldt_info = { -1 };
2449
2450 ldt_info.seg_32bit = 1;
2451 ldt_info.usable = 1;
2452 if (set_thread_area( &ldt_info ) >= 0) gdt_fs_sel = (ldt_info.entry_number << 3) | 3;
2453 else gdt_fs_sel = 0;
2454 }
2455 #elif defined(__FreeBSD__) || defined (__FreeBSD_kernel__)
2456 gdt_fs_sel = GSEL( GUFS_SEL, SEL_UPL );
2457 #endif
2458 }
2459
2460 WORD ldt_alloc_fs( TEB *teb, int first_thread )
2461 {
2462 LDT_ENTRY entry;
2463 int idx;
2464
2465 if (gdt_fs_sel) return gdt_fs_sel;
2466
2467 entry = ldt_make_entry( teb, teb_size - 1, LDT_FLAGS_DATA | LDT_FLAGS_32BIT );
2468
2469 if (first_thread) /* no locking for first thread */
2470 {
2471 /* leave some space if libc is using the LDT for %gs */
2472 if (!is_gdt_sel( get_gs() )) first_ldt_entry = 512;
2473 idx = first_ldt_entry;
2474 ldt_set_entry( (idx << 3) | 7, entry );
2475 }
2476 else
2477 {
2478 ldt_lock();
2479 for (idx = first_ldt_entry; idx < LDT_SIZE; idx++)
2480 {
2481 if (__wine_ldt_copy.flags[idx]) continue;
2482 ldt_set_entry( (idx << 3) | 7, entry );
2483 break;
2484 }
2485 ldt_unlock();
2486 if (idx == LDT_SIZE) return 0;
2487 }
2488 return (idx << 3) | 7;
2489 }
2490
2491 static void ldt_free_fs( WORD sel )
2492 {
2493 if (sel == gdt_fs_sel) return;
2494
2495 ldt_lock();
2496 __wine_ldt_copy.flags[sel >> 3] = 0;
2497 ldt_unlock();
2498 }
2499
2500 static void ldt_set_fs( WORD sel, TEB *teb )
2501 {
2502 if (sel == gdt_fs_sel)
2503 {
2504 #ifdef __linux__
2505 struct modify_ldt_s ldt_info = { sel >> 3 };
2506
2507 ldt_info.base_addr = teb;
2508 ldt_info.limit = teb_size - 1;
2509 ldt_info.seg_32bit = 1;
2510 if (set_thread_area( &ldt_info ) < 0) perror( "set_thread_area" );
2511 #elif defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__DragonFly__)
2512 i386_set_fsbase( teb );
2513 #endif
2514 }
2515 set_fs( sel );
2516 }
2517
2518
2519 /**********************************************************************
2520 * get_thread_ldt_entry
2521 */
2522 NTSTATUS get_thread_ldt_entry( HANDLE handle, void *data, ULONG len, ULONG *ret_len )
2523 {
2524 THREAD_DESCRIPTOR_INFORMATION *info = data;
2525 NTSTATUS status = STATUS_SUCCESS;
2526
2527 if (len < sizeof(*info)) return STATUS_INFO_LENGTH_MISMATCH;
2528 if (info->Selector >> 16) return STATUS_UNSUCCESSFUL;
2529
2530 if (is_gdt_sel( info->Selector ))
2531 {
2532 if (!(info->Selector & ~3))
2533 info->Entry = null_entry;
2534 else if ((info->Selector | 3) == get_cs())
2535 info->Entry = ldt_make_entry( 0, ~0u, LDT_FLAGS_CODE | LDT_FLAGS_32BIT );
2536 else if ((info->Selector | 3) == get_ds())
2537 info->Entry = ldt_make_entry( 0, ~0u, LDT_FLAGS_DATA | LDT_FLAGS_32BIT );
2538 else if ((info->Selector | 3) == get_fs())
2539 info->Entry = ldt_make_entry( NtCurrentTeb(), 0xfff, LDT_FLAGS_DATA | LDT_FLAGS_32BIT );
2540 else
2541 return STATUS_UNSUCCESSFUL;
2542 }
2543 else
2544 {
2545 SERVER_START_REQ( get_selector_entry )
2546 {
2547 req->handle = wine_server_obj_handle( handle );
2548 req->entry = info->Selector >> 3;
2549 status = wine_server_call( req );
2550 if (!status)
2551 {
2552 if (reply->flags)
2553 info->Entry = ldt_make_entry( (void *)reply->base, reply->limit, reply->flags );
2554 else
2555 status = STATUS_UNSUCCESSFUL;
2556 }
2557 }
2558 SERVER_END_REQ;
2559 }
2560 if (status == STATUS_SUCCESS && ret_len)
2561 /* yes, that's a bit strange, but it's the way it is */
2562 *ret_len = sizeof(info->Entry);
2563
2564 return status;
2565 }
2566
2567
2568 /******************************************************************************
2569 * NtSetLdtEntries (NTDLL.@)
2570 * ZwSetLdtEntries (NTDLL.@)
2571 */
2572 NTSTATUS WINAPI NtSetLdtEntries( ULONG sel1, LDT_ENTRY entry1, ULONG sel2, LDT_ENTRY entry2 )
2573 {
2574 if (sel1 >> 16 || sel2 >> 16) return STATUS_INVALID_LDT_DESCRIPTOR;
2575 if (sel1 && (sel1 >> 3) < first_ldt_entry) return STATUS_INVALID_LDT_DESCRIPTOR;
2576 if (sel2 && (sel2 >> 3) < first_ldt_entry) return STATUS_INVALID_LDT_DESCRIPTOR;
2577
2578 ldt_lock();
2579 if (sel1) ldt_set_entry( sel1, entry1 );
2580 if (sel2) ldt_set_entry( sel2, entry2 );
2581 ldt_unlock();
2582 return STATUS_SUCCESS;
2583 }
2584
2585
2586 /**********************************************************************
2587 * signal_alloc_thread
2588 */
2589 NTSTATUS signal_alloc_thread( TEB **teb )
2590 {
2591 static size_t sigstack_alignment;
2592 struct x86_thread_data *thread_data;
2593 SIZE_T size;
2594 void *addr = NULL;
2595 NTSTATUS status;
2596 int first_thread = !sigstack_alignment;
2597
2598 if (!sigstack_alignment)
2599 {
2600 size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 );
2601 /* find the first power of two not smaller than min_size */
2602 sigstack_alignment = 12;
2603 while ((1u << sigstack_alignment) < min_size) sigstack_alignment++;
2604 signal_stack_mask = (1 << sigstack_alignment) - 1;
2605 signal_stack_size = (1 << sigstack_alignment) - teb_size;
2606 ldt_init();
2607 }
2608
2609 size = signal_stack_mask + 1;
2610 if (!(status = virtual_alloc_aligned( &addr, 0, &size, MEM_COMMIT | MEM_TOP_DOWN,
2611 PAGE_READWRITE, sigstack_alignment )))
2612 {
2613 *teb = addr;
2614 (*teb)->Tib.Self = &(*teb)->Tib;
2615 (*teb)->Tib.ExceptionList = (void *)~0UL;
2616 thread_data = (struct x86_thread_data *)(*teb)->SystemReserved2;
2617 if (!(thread_data->fs = ldt_alloc_fs( *teb, first_thread )))
2618 {
2619 size = 0;
2620 NtFreeVirtualMemory( NtCurrentProcess(), &addr, &size, MEM_RELEASE );
2621 status = STATUS_TOO_MANY_THREADS;
2622 }
2623 }
2624 return status;
2625 }
2626
2627
2628 /**********************************************************************
2629 * signal_free_thread
2630 */
2631 void signal_free_thread( TEB *teb )
2632 {
2633 SIZE_T size = 0;
2634 struct x86_thread_data *thread_data = (struct x86_thread_data *)teb->SystemReserved2;
2635
2636 ldt_free_fs( thread_data->fs );
2637 NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
2638 }
2639
2640
2641 /**********************************************************************
2642 * signal_init_thread
2643 */
2644 void signal_init_thread( TEB *teb )
2645 {
2646 const WORD fpu_cw = 0x27f;
2647 struct x86_thread_data *thread_data = (struct x86_thread_data *)teb->SystemReserved2;
2648 stack_t ss;
2649
2650 #ifdef __APPLE__
2651 int mib[2], val = 1;
2652
2653 mib[0] = CTL_KERN;
2654 mib[1] = KERN_THALTSTACK;
2655 sysctl( mib, 2, NULL, NULL, &val, sizeof(val) );
2656 #endif
2657
2658 ss.ss_sp = (char *)teb + teb_size;
2659 ss.ss_size = signal_stack_size;
2660 ss.ss_flags = 0;
2661 if (sigaltstack(&ss, NULL) == -1) perror( "sigaltstack" );
2662
2663 ldt_set_fs( thread_data->fs, teb );
2664 thread_data->gs = get_gs();
2665
2666 #ifdef __GNUC__
2667 __asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw));
2668 #else
2669 FIXME("FPU setup not implemented for this platform.\n");
2670 #endif
2671 }
2672
2673 /**********************************************************************
2674 * signal_init_process
2675 */
2676 void signal_init_process(void)
2677 {
2678 struct sigaction sig_act;
2679
2680 sig_act.sa_mask = server_block_set;
2681 sig_act.sa_flags = SA_SIGINFO | SA_RESTART;
2682 #ifdef SA_ONSTACK
2683 sig_act.sa_flags |= SA_ONSTACK;
2684 #endif
2685 #ifdef __ANDROID__
2686 sig_act.sa_flags |= SA_RESTORER;
2687 sig_act.sa_restorer = rt_sigreturn;
2688 #endif
2689 sig_act.sa_sigaction = int_handler;
2690 if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
2691 sig_act.sa_sigaction = fpe_handler;
2692 if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
2693 sig_act.sa_sigaction = abrt_handler;
2694 if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
2695 sig_act.sa_sigaction = quit_handler;
2696 if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
2697 sig_act.sa_sigaction = usr1_handler;
2698 if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
2699
2700 sig_act.sa_sigaction = segv_handler;
2701 if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
2702 if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
2703 #ifdef SIGBUS
2704 if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
2705 #endif
2706
2707 #ifdef SIGTRAP
2708 sig_act.sa_sigaction = trap_handler;
2709 if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
2710 #endif
2711 return;
2712
2713 error:
2714 perror("sigaction");
2715 exit(1);
2716 }
2717
2718
2719 /*******************************************************************
2720 * RtlUnwind (NTDLL.@)
2721 */
2722 void WINAPI DECLSPEC_HIDDEN __regs_RtlUnwind( EXCEPTION_REGISTRATION_RECORD* pEndFrame, PVOID targetIp,
2723 PEXCEPTION_RECORD pRecord, PVOID retval, CONTEXT *context )
2724 {
2725 EXCEPTION_RECORD record;
2726 EXCEPTION_REGISTRATION_RECORD *frame, *dispatch;
2727 DWORD res;
2728
2729 context->Eax = (DWORD)retval;
2730
2731 /* build an exception record, if we do not have one */
2732 if (!pRecord)
2733 {
2734 record.ExceptionCode = STATUS_UNWIND;
2735 record.ExceptionFlags = 0;
2736 record.ExceptionRecord = NULL;
2737 record.ExceptionAddress = (void *)context->Eip;
2738 record.NumberParameters = 0;
2739 pRecord = &record;
2740 }
2741
2742 pRecord->ExceptionFlags |= EH_UNWINDING | (pEndFrame ? 0 : EH_EXIT_UNWIND);
2743
2744 TRACE( "code=%x flags=%x\n", pRecord->ExceptionCode, pRecord->ExceptionFlags );
2745 TRACE( "eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n",
2746 context->Eax, context->Ebx, context->Ecx, context->Edx, context->Esi, context->Edi );
2747 TRACE( "ebp=%08x esp=%08x eip=%08x cs=%04x ds=%04x fs=%04x gs=%04x flags=%08x\n",
2748 context->Ebp, context->Esp, context->Eip, LOWORD(context->SegCs), LOWORD(context->SegDs),
2749 LOWORD(context->SegFs), LOWORD(context->SegGs), context->EFlags );
2750
2751 /* get chain of exception frames */
2752 frame = NtCurrentTeb()->Tib.ExceptionList;
2753 while ((frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL) && (frame != pEndFrame))
2754 {
2755 /* Check frame address */
2756 if (pEndFrame && (frame > pEndFrame))
2757 raise_status( STATUS_INVALID_UNWIND_TARGET, pRecord );
2758
2759 if (!is_valid_frame( frame )) raise_status( STATUS_BAD_STACK, pRecord );
2760
2761 /* Call handler */
2762 TRACE( "calling handler at %p code=%x flags=%x\n",
2763 frame->Handler, pRecord->ExceptionCode, pRecord->ExceptionFlags );
2764 res = EXC_CallHandler( pRecord, frame, context, &dispatch, frame->Handler, unwind_handler );
2765 TRACE( "handler at %p returned %x\n", frame->Handler, res );
2766
2767 switch(res)
2768 {
2769 case ExceptionContinueSearch:
2770 break;
2771 case ExceptionCollidedUnwind:
2772 frame = dispatch;
2773 break;
2774 default:
2775 raise_status( STATUS_INVALID_DISPOSITION, pRecord );
2776 break;
2777 }
2778 frame = __wine_pop_frame( frame );
2779 }
2780
2781 NtSetContextThread( GetCurrentThread(), context );
2782 }
2783 __ASM_STDCALL_FUNC( RtlUnwind, 16,
2784 "pushl %ebp\n\t"
2785 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2786 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2787 "movl %esp,%ebp\n\t"
2788 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2789 "leal -(0x2cc+8)(%esp),%esp\n\t" /* sizeof(CONTEXT) + alignment */
2790 "pushl %eax\n\t"
2791 "leal 4(%esp),%eax\n\t" /* context */
2792 "xchgl %eax,(%esp)\n\t"
2793 "call " __ASM_STDCALL("RtlCaptureContext",4) "\n\t"
2794 "leal 24(%ebp),%eax\n\t"
2795 "movl %eax,0xc4(%esp)\n\t" /* context->Esp */
2796 "pushl %esp\n\t"
2797 "pushl 20(%ebp)\n\t"
2798 "pushl 16(%ebp)\n\t"
2799 "pushl 12(%ebp)\n\t"
2800 "pushl 8(%ebp)\n\t"
2801 "call " __ASM_STDCALL("__regs_RtlUnwind",20) "\n\t"
2802 "leave\n\t"
2803 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2804 __ASM_CFI(".cfi_same_value %ebp\n\t")
2805 "ret $16" ) /* actually never returns */
2806
2807
2808 /*******************************************************************
2809 * NtRaiseException (NTDLL.@)
2810 */
2811 NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
2812 {
2813 if (first_chance)
2814 {
2815 NTSTATUS status = send_debug_event( rec, TRUE, context );
2816 if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
2817 NtSetContextThread( GetCurrentThread(), context );
2818 }
2819 return raise_exception( rec, context, first_chance );
2820 }
2821
2822
2823 /*******************************************************************
2824 * raise_exception_full_context
2825 *
2826 * Raise an exception with the full CPU context.
2827 */
2828 void raise_exception_full_context( EXCEPTION_RECORD *rec, CONTEXT *context )
2829 {
2830 save_fpu( context );
2831 save_fpux( context );
2832 /* FIXME: xstate */
2833 context->Dr0 = x86_thread_data()->dr0;
2834 context->Dr1 = x86_thread_data()->dr1;
2835 context->Dr2 = x86_thread_data()->dr2;
2836 context->Dr3 = x86_thread_data()->dr3;
2837 context->Dr6 = x86_thread_data()->dr6;
2838 context->Dr7 = x86_thread_data()->dr7;
2839 context->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
2840
2841 RtlRaiseStatus( NtRaiseException( rec, context, TRUE ));
2842 }
2843
2844
2845 /***********************************************************************
2846 * RtlRaiseException (NTDLL.@)
2847 */
2848 __ASM_STDCALL_FUNC( RtlRaiseException, 4,
2849 "pushl %ebp\n\t"
2850 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2851 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2852 "movl %esp,%ebp\n\t"
2853 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2854 "leal -0x2cc(%esp),%esp\n\t" /* sizeof(CONTEXT) */
2855 "pushl %esp\n\t" /* context */
2856 "call " __ASM_STDCALL("RtlCaptureContext",4) "\n\t"
2857 "movl 4(%ebp),%eax\n\t" /* return address */
2858 "movl 8(%ebp),%ecx\n\t" /* rec */
2859 "movl %eax,12(%ecx)\n\t" /* rec->ExceptionAddress */
2860 "leal 12(%ebp),%eax\n\t"
2861 "movl %eax,0xc4(%esp)\n\t" /* context->Esp */
2862 "movl %esp,%eax\n\t"
2863 "pushl %eax\n\t"
2864 "pushl %ecx\n\t"
2865 "call " __ASM_NAME("raise_exception_full_context") "\n\t"
2866 "leave\n\t"
2867 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2868 __ASM_CFI(".cfi_same_value %ebp\n\t")
2869 "ret $4" ) /* actually never returns */
2870
2871
2872 /*************************************************************************
2873 * RtlCaptureStackBackTrace (NTDLL.@)
2874 */
2875 USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
2876 {
2877 CONTEXT context;
2878 ULONG i;
2879 ULONG *frame;
2880
2881 RtlCaptureContext( &context );
2882 if (hash) *hash = 0;
2883 frame = (ULONG *)context.Ebp;
2884
2885 while (skip--)
2886 {
2887 if (!is_valid_frame( frame )) return 0;
2888 frame = (ULONG *)*frame;
2889 }
2890
2891 for (i = 0; i < count; i++)
2892 {
2893 if (!is_valid_frame( frame )) break;
2894 buffer[i] = (void *)frame[1];
2895 if (hash) *hash += frame[1];
2896 frame = (ULONG *)*frame;
2897 }
2898 return i;
2899 }
2900
2901
2902 extern void DECLSPEC_NORETURN start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend,
2903 void *relay );
2904 __ASM_GLOBAL_FUNC( start_thread,
2905 "pushl %ebp\n\t"
2906 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2907 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2908 "movl %esp,%ebp\n\t"
2909 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2910 "pushl %ebx\n\t"
2911 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2912 "pushl %esi\n\t"
2913 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
2914 "pushl %edi\n\t"
2915 __ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
2916 /* store exit frame */
2917 "movl %ebp,%fs:0x1f4\n\t" /* x86_thread_data()->exit_frame */
2918 /* switch to thread stack */
2919 "movl %fs:4,%eax\n\t" /* NtCurrentTeb()->StackBase */
2920 "leal -0x1000(%eax),%esp\n\t"
2921 /* attach dlls */
2922 "pushl 20(%ebp)\n\t" /* relay */
2923 "pushl 16(%ebp)\n\t" /* suspend */
2924 "pushl 12(%ebp)\n\t" /* arg */
2925 "pushl 8(%ebp)\n\t" /* entry */
2926 "xorl %ebp,%ebp\n\t"
2927 "call " __ASM_NAME("attach_thread") "\n\t"
2928 "movl %eax,%esi\n\t"
2929 "leal -12(%eax),%esp\n\t"
2930 /* clear the stack */
2931 "andl $~0xfff,%eax\n\t" /* round down to page size */
2932 "movl %eax,(%esp)\n\t"
2933 "call " __ASM_NAME("virtual_clear_thread_stack") "\n\t"
2934 /* switch to the initial context */
2935 "movl %esi,(%esp)\n\t"
2936 "call " __ASM_NAME("set_cpu_context") )
2937
2938 extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int) );
2939 __ASM_GLOBAL_FUNC( call_thread_exit_func,
2940 "movl 8(%esp),%ecx\n\t"
2941 /* fetch exit frame */
2942 "movl %fs:0x1f4,%edx\n\t" /* x86_thread_data()->exit_frame */
2943 "testl %edx,%edx\n\t"
2944 "jnz 1f\n\t"
2945 "jmp *%ecx\n\t"
2946 /* switch to exit frame stack */
2947 "1:\tmovl 4(%esp),%eax\n\t"
2948 "movl $0,%fs:0x1f4\n\t"
2949 "movl %edx,%ebp\n\t"
2950 __ASM_CFI(".cfi_def_cfa %ebp,4\n\t")
2951 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2952 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2953 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
2954 __ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
2955 "leal -20(%ebp),%esp\n\t"
2956 "pushl %eax\n\t"
2957 "call *%ecx" )
2958
2959 extern void call_thread_entry(void) DECLSPEC_HIDDEN;
2960 __ASM_GLOBAL_FUNC( call_thread_entry,
2961 "pushl %ebp\n\t"
2962 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2963 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2964 "movl %esp,%ebp\n\t"
2965 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2966 "pushl %ebx\n\t" /* arg */
2967 "pushl %eax\n\t" /* entry */
2968 "call " __ASM_NAME("call_thread_func") )
2969
2970 /* wrapper for apps that don't declare the thread function correctly */
2971 extern DWORD call_thread_func_wrapper( LPTHREAD_START_ROUTINE entry, void *arg );
2972 __ASM_GLOBAL_FUNC(call_thread_func_wrapper,
2973 "pushl %ebp\n\t"
2974 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2975 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2976 "movl %esp,%ebp\n\t"
2977 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2978 "subl $4,%esp\n\t"
2979 "pushl 12(%ebp)\n\t"
2980 "call *8(%ebp)\n\t"
2981 "leave\n\t"
2982 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2983 __ASM_CFI(".cfi_same_value %ebp\n\t")
2984 "ret" )
2985
2986 /***********************************************************************
2987 * call_thread_func
2988 */
2989 void DECLSPEC_HIDDEN call_thread_func( LPTHREAD_START_ROUTINE entry, void *arg )
2990 {
2991 __TRY
2992 {
2993 TRACE_(relay)( "\1Starting thread proc %p (arg=%p)\n", entry, arg );
2994 RtlExitUserThread( call_thread_func_wrapper( entry, arg ));
2995 }
2996 __EXCEPT(call_unhandled_exception_filter)
2997 {
2998 NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
2999 }
3000 __ENDTRY
3001 abort(); /* should not be reached */
3002 }
3003
3004
3005 /***********************************************************************
3006 * init_thread_context
3007 */
3008 static void init_thread_context( CONTEXT *context, LPTHREAD_START_ROUTINE entry, void *arg, void *relay )
3009 {
3010 context->SegCs = get_cs();
3011 context->SegDs = get_ds();
3012 context->SegEs = get_ds();
3013 context->SegFs = get_fs();
3014 context->SegGs = get_gs();
3015 context->SegSs = get_ds();
3016 context->EFlags = 0x202;
3017 context->Eax = (DWORD)entry;
3018 context->Ebx = (DWORD)arg;
3019 context->Esp = (DWORD)NtCurrentTeb()->Tib.StackBase - 16;
3020 context->Eip = (DWORD)relay;
3021 context->FloatSave.ControlWord = 0x27f;
3022 ((XMM_SAVE_AREA32 *)context->ExtendedRegisters)->ControlWord = 0x27f;
3023 ((XMM_SAVE_AREA32 *)context->ExtendedRegisters)->MxCsr = 0x1f80;
3024 }
3025
3026
3027 /***********************************************************************
3028 * attach_thread
3029 */
3030 PCONTEXT DECLSPEC_HIDDEN attach_thread( LPTHREAD_START_ROUTINE entry, void *arg,
3031 BOOL suspend, void *relay )
3032 {
3033 CONTEXT *ctx;
3034
3035 if (suspend)
3036 {
3037 CONTEXT context = { CONTEXT_ALL };
3038
3039 init_thread_context( &context, entry, arg, relay );
3040 wait_suspend( &context );
3041 ctx = (CONTEXT *)((ULONG_PTR)context.Esp & ~15) - 1;
3042 *ctx = context;
3043 }
3044 else
3045 {
3046 ctx = (CONTEXT *)((char *)NtCurrentTeb()->Tib.StackBase - 16) - 1;
3047 init_thread_context( ctx, entry, arg, relay );
3048 }
3049 ctx->ContextFlags = CONTEXT_FULL | CONTEXT_FLOATING_POINT | CONTEXT_EXTENDED_REGISTERS;
3050 LdrInitializeThunk( ctx, (void **)&ctx->Eax, 0, 0 );
3051 return ctx;
3052 }
3053
3054
3055 /***********************************************************************
3056 * signal_start_thread
3057 *
3058 * Thread startup sequence:
3059 * signal_start_thread()
3060 * -> start_thread()
3061 * -> call_thread_entry()
3062 * -> call_thread_func()
3063 */
3064 void signal_start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend )
3065 {
3066 start_thread( entry, arg, suspend, call_thread_entry );
3067 }
3068
3069 /**********************************************************************
3070 * signal_start_process
3071 *
3072 * Process startup sequence:
3073 * signal_start_process()
3074 * -> start_thread()
3075 * -> kernel32_start_process()
3076 */
3077 void signal_start_process( LPTHREAD_START_ROUTINE entry, BOOL suspend )
3078 {
3079 start_thread( entry, NtCurrentTeb()->Peb, suspend, kernel32_start_process );
3080 }
3081
3082
3083 /***********************************************************************
3084 * signal_exit_thread
3085 */
3086 void signal_exit_thread( int status )
3087 {
3088 call_thread_exit_func( status, exit_thread );
3089 }
3090
3091 /***********************************************************************
3092 * signal_exit_process
3093 */
3094 void signal_exit_process( int status )
3095 {
3096 call_thread_exit_func( status, exit );
3097 }
3098
3099 /**********************************************************************
3100 * DbgBreakPoint (NTDLL.@)
3101 */
3102 __ASM_STDCALL_FUNC( DbgBreakPoint, 0, "int $3; ret")
3103
3104 /**********************************************************************
3105 * DbgUserBreakPoint (NTDLL.@)
3106 */
3107 __ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "int $3; ret")
3108
3109 /**********************************************************************
3110 * NtCurrentTeb (NTDLL.@)
3111 */
3112 __ASM_STDCALL_FUNC( NtCurrentTeb, 0, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" )
3113
3114
3115 /**************************************************************************
3116 * _chkstk (NTDLL.@)
3117 */
3118 __ASM_STDCALL_FUNC( _chkstk, 0,
3119 "negl %eax\n\t"
3120 "addl %esp,%eax\n\t"
3121 "xchgl %esp,%eax\n\t"
3122 "movl 0(%eax),%eax\n\t" /* copy return address from old location */
3123 "movl %eax,0(%esp)\n\t"
3124 "ret" )
3125
3126 /**************************************************************************
3127 * _alloca_probe (NTDLL.@)
3128 */
3129 __ASM_STDCALL_FUNC( _alloca_probe, 0,
3130 "negl %eax\n\t"
3131 "addl %esp,%eax\n\t"
3132 "xchgl %esp,%eax\n\t"
3133 "movl 0(%eax),%eax\n\t" /* copy return address from old location */
3134 "movl %eax,0(%esp)\n\t"
3135 "ret" )
3136
3137
3138 /**********************************************************************
3139 * EXC_CallHandler (internal)
3140 *
3141 * Some exception handlers depend on EBP to have a fixed position relative to
3142 * the exception frame.
3143 * Shrinker depends on (*1) doing what it does,
3144 * (*2) being the exact instruction it is and (*3) beginning with 0x64
3145 * (i.e. the %fs prefix to the movl instruction). It also depends on the
3146 * function calling the handler having only 5 parameters (*4).
3147 */
3148 __ASM_GLOBAL_FUNC( EXC_CallHandler,
3149 "pushl %ebp\n\t"
3150 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
3151 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
3152 "movl %esp,%ebp\n\t"
3153 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
3154 "pushl %ebx\n\t"
3155 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
3156 "movl 28(%ebp), %edx\n\t" /* ugly hack to pass the 6th param needed because of Shrinker */
3157 "pushl 24(%ebp)\n\t"
3158 "pushl 20(%ebp)\n\t"
3159 "pushl 16(%ebp)\n\t"
3160 "pushl 12(%ebp)\n\t"
3161 "pushl 8(%ebp)\n\t"
3162 "call " __ASM_NAME("call_exception_handler") "\n\t"
3163 "popl %ebx\n\t"
3164 __ASM_CFI(".cfi_same_value %ebx\n\t")
3165 "leave\n"
3166 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
3167 __ASM_CFI(".cfi_same_value %ebp\n\t")
3168 "ret" )
3169 __ASM_GLOBAL_FUNC(call_exception_handler,
3170 "pushl %ebp\n\t"
3171 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
3172 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
3173 "movl %esp,%ebp\n\t"
3174 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
3175 "subl $12,%esp\n\t"
3176 "pushl 12(%ebp)\n\t" /* make any exceptions in this... */
3177 "pushl %edx\n\t" /* handler be handled by... */
3178 ".byte 0x64\n\t"
3179 "pushl (0)\n\t" /* nested_handler (passed in edx). */
3180 ".byte 0x64\n\t"
3181 "movl %esp,(0)\n\t" /* push the new exception frame onto the exception stack. */
3182 "pushl 20(%ebp)\n\t"
3183 "pushl 16(%ebp)\n\t"
3184 "pushl 12(%ebp)\n\t"
3185 "pushl 8(%ebp)\n\t"
3186 "movl 24(%ebp), %ecx\n\t" /* (*1) */
3187 "call *%ecx\n\t" /* call handler. (*2) */
3188 ".byte 0x64\n\t"
3189 "movl (0), %esp\n\t" /* restore previous... (*3) */
3190 ".byte 0x64\n\t"
3191 "popl (0)\n\t" /* exception frame. */
3192 "movl %ebp, %esp\n\t" /* restore saved stack, in case it was corrupted */
3193 "popl %ebp\n\t"
3194 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
3195 __ASM_CFI(".cfi_same_value %ebp\n\t")
3196 "ret $20" ) /* (*4) */
3197
3198 #endif /* __i386__ */
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