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wined3d: Support getdc with user memory.
[wine.git] / dlls / ntdll / signal_i386.c
blobfe6d517ce4d5ff84eb211ef6f12664b5c24fd51b
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
36 #ifdef HAVE_SYS_PARAM_H
37 # include <sys/param.h>
38 #endif
39 #ifdef HAVE_SYSCALL_H
40 # include <syscall.h>
41 #else
42 # ifdef HAVE_SYS_SYSCALL_H
43 # include <sys/syscall.h>
44 # endif
45 #endif
46
47 #ifdef HAVE_SYS_VM86_H
48 # include <sys/vm86.h>
49 #endif
50
51 #ifdef HAVE_SYS_SIGNAL_H
52 # include <sys/signal.h>
53 #endif
54 #ifdef HAVE_SYS_SYSCTL_H
55 # include <sys/sysctl.h>
56 #endif
57
58 #include "ntstatus.h"
59 #define WIN32_NO_STATUS
60 #include "windef.h"
61 #include "wine/library.h"
62 #include "ntdll_misc.h"
63 #include "wine/exception.h"
64 #include "wine/debug.h"
65
66 #ifdef HAVE_VALGRIND_MEMCHECK_H
67 #include <valgrind/memcheck.h>
68 #endif
69
70 #undef ERR /* Solaris needs to define this */
71
72 /* not defined for x86, so copy the x86_64 definition */
73 typedef struct DECLSPEC_ALIGN(16) _M128A
74 {
75 ULONGLONG Low;
76 LONGLONG High;
77 } M128A;
78
79 typedef struct
80 {
81 WORD ControlWord;
82 WORD StatusWord;
83 BYTE TagWord;
84 BYTE Reserved1;
85 WORD ErrorOpcode;
86 DWORD ErrorOffset;
87 WORD ErrorSelector;
88 WORD Reserved2;
89 DWORD DataOffset;
90 WORD DataSelector;
91 WORD Reserved3;
92 DWORD MxCsr;
93 DWORD MxCsr_Mask;
94 M128A FloatRegisters[8];
95 M128A XmmRegisters[16];
96 BYTE Reserved4[96];
97 } XMM_SAVE_AREA32;
98
99 /***********************************************************************
100 * signal context platform-specific definitions
101 */
102
103 #ifdef __ANDROID__
104
105 typedef struct ucontext
106 {
107 unsigned long uc_flags;
108 struct ucontext *uc_link;
109 stack_t uc_stack;
110 struct sigcontext uc_mcontext;
111 sigset_t uc_sigmask;
112 } SIGCONTEXT;
113
114 #define EAX_sig(context) ((context)->uc_mcontext.eax)
115 #define EBX_sig(context) ((context)->uc_mcontext.ebx)
116 #define ECX_sig(context) ((context)->uc_mcontext.ecx)
117 #define EDX_sig(context) ((context)->uc_mcontext.edx)
118 #define ESI_sig(context) ((context)->uc_mcontext.esi)
119 #define EDI_sig(context) ((context)->uc_mcontext.edi)
120 #define EBP_sig(context) ((context)->uc_mcontext.ebp)
121 #define ESP_sig(context) ((context)->uc_mcontext.esp)
122
123 #define CS_sig(context) ((context)->uc_mcontext.cs)
124 #define DS_sig(context) ((context)->uc_mcontext.ds)
125 #define ES_sig(context) ((context)->uc_mcontext.es)
126 #define SS_sig(context) ((context)->uc_mcontext.ss)
127 #define FS_sig(context) ((context)->uc_mcontext.fs)
128 #define GS_sig(context) ((context)->uc_mcontext.gs)
129
130 #define EFL_sig(context) ((context)->uc_mcontext.eflags)
131 #define EIP_sig(context) ((context)->uc_mcontext.eip)
132 #define TRAP_sig(context) ((context)->uc_mcontext.trapno)
133 #define ERROR_sig(context) ((context)->uc_mcontext.err)
134
135 #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->uc_mcontext.fpstate))
136 #define FPUX_sig(context) (FPU_sig(context) && !((context)->uc_mcontext.fpstate->status >> 16) ? (XMM_SAVE_AREA32 *)(FPU_sig(context) + 1) : NULL)
137
138 #elif defined (__linux__)
139
140 typedef ucontext_t SIGCONTEXT;
141
142 #define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX])
143 #define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX])
144 #define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX])
145 #define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX])
146 #define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI])
147 #define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI])
148 #define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP])
149 #define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP])
150
151 #define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS])
152 #define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS])
153 #define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES])
154 #define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS])
155 #define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS])
156 #define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS])
157
158 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
159 #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
160 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
161 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
162
163 #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->uc_mcontext.fpregs))
164 #define FPUX_sig(context) (FPU_sig(context) && !((context)->uc_mcontext.fpregs->status >> 16) ? (XMM_SAVE_AREA32 *)(FPU_sig(context) + 1) : NULL)
165
166 #define VM86_EAX 0 /* the %eax value while vm86_enter is executing */
167 #define VIF_FLAG 0x00080000
168 #define VIP_FLAG 0x00100000
169
170 int vm86_enter( void **vm86_ptr );
171 void vm86_return(void);
172 void vm86_return_end(void);
173 __ASM_GLOBAL_FUNC(vm86_enter,
174 "pushl %ebp\n\t"
175 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
176 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
177 "movl %esp,%ebp\n\t"
178 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
179 "pushl %ebx\n\t"
180 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
181 "movl $166,%eax\n\t" /*SYS_vm86*/
182 "movl 8(%ebp),%ecx\n\t" /* vm86_ptr */
183 "movl (%ecx),%ecx\n\t"
184 "movl $1,%ebx\n\t" /*VM86_ENTER*/
185 "pushl %ecx\n\t" /* put vm86plus_struct ptr somewhere we can find it */
186 "pushl %fs\n\t"
187 "pushl %gs\n\t"
188 "int $0x80\n"
189 ".globl " __ASM_NAME("vm86_return") "\n\t"
190 __ASM_FUNC("vm86_return") "\n"
191 __ASM_NAME("vm86_return") ":\n\t"
192 "popl %gs\n\t"
193 "popl %fs\n\t"
194 "popl %ecx\n\t"
195 "popl %ebx\n\t"
196 __ASM_CFI(".cfi_same_value %ebx\n\t")
197 "popl %ebp\n\t"
198 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
199 __ASM_CFI(".cfi_same_value %ebp\n\t")
200 "testl %eax,%eax\n\t"
201 "jl 0f\n\t"
202 "cmpb $0,%al\n\t" /* VM86_SIGNAL */
203 "je " __ASM_NAME("vm86_enter") "\n\t"
204 "0:\n\t"
205 "movl 4(%esp),%ecx\n\t" /* vm86_ptr */
206 "movl $0,(%ecx)\n\t"
207 ".globl " __ASM_NAME("vm86_return_end") "\n\t"
208 __ASM_FUNC("vm86_return_end") "\n"
209 __ASM_NAME("vm86_return_end") ":\n\t"
210 "ret" )
211
212 #ifdef HAVE_SYS_VM86_H
213 # define __HAVE_VM86
214 #endif
215
216 #elif defined (__BSDI__)
217
218 #include <machine/frame.h>
219 typedef struct trapframe SIGCONTEXT;
220
221 #define EAX_sig(context) ((context)->tf_eax)
222 #define EBX_sig(context) ((context)->tf_ebx)
223 #define ECX_sig(context) ((context)->tf_ecx)
224 #define EDX_sig(context) ((context)->tf_edx)
225 #define ESI_sig(context) ((context)->tf_esi)
226 #define EDI_sig(context) ((context)->tf_edi)
227 #define EBP_sig(context) ((context)->tf_ebp)
228
229 #define CS_sig(context) ((context)->tf_cs)
230 #define DS_sig(context) ((context)->tf_ds)
231 #define ES_sig(context) ((context)->tf_es)
232 #define SS_sig(context) ((context)->tf_ss)
233
234 #define EFL_sig(context) ((context)->tf_eflags)
235
236 #define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
237 #define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
238
239 #define FPU_sig(context) NULL /* FIXME */
240 #define FPUX_sig(context) NULL /* FIXME */
241
242 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
243
244 #include <machine/trap.h>
245
246 typedef struct sigcontext SIGCONTEXT;
247
248 #define EAX_sig(context) ((context)->sc_eax)
249 #define EBX_sig(context) ((context)->sc_ebx)
250 #define ECX_sig(context) ((context)->sc_ecx)
251 #define EDX_sig(context) ((context)->sc_edx)
252 #define ESI_sig(context) ((context)->sc_esi)
253 #define EDI_sig(context) ((context)->sc_edi)
254 #define EBP_sig(context) ((context)->sc_ebp)
255
256 #define CS_sig(context) ((context)->sc_cs)
257 #define DS_sig(context) ((context)->sc_ds)
258 #define ES_sig(context) ((context)->sc_es)
259 #define FS_sig(context) ((context)->sc_fs)
260 #define GS_sig(context) ((context)->sc_gs)
261 #define SS_sig(context) ((context)->sc_ss)
262
263 #define TRAP_sig(context) ((context)->sc_trapno)
264 #define ERROR_sig(context) ((context)->sc_err)
265 #define EFL_sig(context) ((context)->sc_eflags)
266
267 #define EIP_sig(context) ((context)->sc_eip)
268 #define ESP_sig(context) ((context)->sc_esp)
269
270 #define FPU_sig(context) NULL /* FIXME */
271 #define FPUX_sig(context) NULL /* FIXME */
272
273 #elif defined (__OpenBSD__)
274
275 typedef struct sigcontext SIGCONTEXT;
276
277 #define EAX_sig(context) ((context)->sc_eax)
278 #define EBX_sig(context) ((context)->sc_ebx)
279 #define ECX_sig(context) ((context)->sc_ecx)
280 #define EDX_sig(context) ((context)->sc_edx)
281 #define ESI_sig(context) ((context)->sc_esi)
282 #define EDI_sig(context) ((context)->sc_edi)
283 #define EBP_sig(context) ((context)->sc_ebp)
284
285 #define CS_sig(context) ((context)->sc_cs)
286 #define DS_sig(context) ((context)->sc_ds)
287 #define ES_sig(context) ((context)->sc_es)
288 #define FS_sig(context) ((context)->sc_fs)
289 #define GS_sig(context) ((context)->sc_gs)
290 #define SS_sig(context) ((context)->sc_ss)
291
292 #define TRAP_sig(context) ((context)->sc_trapno)
293 #define ERROR_sig(context) ((context)->sc_err)
294 #define EFL_sig(context) ((context)->sc_eflags)
295
296 #define EIP_sig(context) ((context)->sc_eip)
297 #define ESP_sig(context) ((context)->sc_esp)
298
299 #define FPU_sig(context) NULL /* FIXME */
300 #define FPUX_sig(context) NULL /* FIXME */
301
302 #define T_MCHK T_MACHK
303 #define T_XMMFLT T_XFTRAP
304
305 #elif defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
306
307 #ifdef _SCO_DS
308 #include <sys/regset.h>
309 #endif
310 #include <sys/ucontext.h>
311 typedef struct ucontext SIGCONTEXT;
312
313 #ifdef _SCO_DS
314 #define gregs regs
315 #endif
316
317 #define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
318 #define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
319 #define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
320 #define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
321 #define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
322 #define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
323 #define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
324
325 #define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
326 #define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
327 #define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
328 #define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
329
330 #define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
331 #define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
332
333 #define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
334
335 #define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
336 #ifdef UESP
337 #define ESP_sig(context) ((context)->uc_mcontext.gregs[UESP])
338 #elif defined(R_ESP)
339 #define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
340 #else
341 #define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
342 #endif
343 #ifdef ERR
344 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[ERR])
345 #endif
346 #ifdef TRAPNO
347 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
348 #endif
349
350 #define FPU_sig(context) NULL /* FIXME */
351 #define FPUX_sig(context) NULL /* FIXME */
352
353 #elif defined (__APPLE__)
354 # include <sys/ucontext.h>
355
356 typedef ucontext_t SIGCONTEXT;
357
358 /* work around silly renaming of struct members in OS X 10.5 */
359 #if __DARWIN_UNIX03 && defined(_STRUCT_X86_EXCEPTION_STATE32)
360 #define EAX_sig(context) ((context)->uc_mcontext->__ss.__eax)
361 #define EBX_sig(context) ((context)->uc_mcontext->__ss.__ebx)
362 #define ECX_sig(context) ((context)->uc_mcontext->__ss.__ecx)
363 #define EDX_sig(context) ((context)->uc_mcontext->__ss.__edx)
364 #define ESI_sig(context) ((context)->uc_mcontext->__ss.__esi)
365 #define EDI_sig(context) ((context)->uc_mcontext->__ss.__edi)
366 #define EBP_sig(context) ((context)->uc_mcontext->__ss.__ebp)
367 #define CS_sig(context) ((context)->uc_mcontext->__ss.__cs)
368 #define DS_sig(context) ((context)->uc_mcontext->__ss.__ds)
369 #define ES_sig(context) ((context)->uc_mcontext->__ss.__es)
370 #define FS_sig(context) ((context)->uc_mcontext->__ss.__fs)
371 #define GS_sig(context) ((context)->uc_mcontext->__ss.__gs)
372 #define SS_sig(context) ((context)->uc_mcontext->__ss.__ss)
373 #define EFL_sig(context) ((context)->uc_mcontext->__ss.__eflags)
374 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__eip))
375 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__esp))
376 #define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno)
377 #define ERROR_sig(context) ((context)->uc_mcontext->__es.__err)
378 #define FPU_sig(context) NULL
379 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->__fs.__fpu_fcw)
380 #else
381 #define EAX_sig(context) ((context)->uc_mcontext->ss.eax)
382 #define EBX_sig(context) ((context)->uc_mcontext->ss.ebx)
383 #define ECX_sig(context) ((context)->uc_mcontext->ss.ecx)
384 #define EDX_sig(context) ((context)->uc_mcontext->ss.edx)
385 #define ESI_sig(context) ((context)->uc_mcontext->ss.esi)
386 #define EDI_sig(context) ((context)->uc_mcontext->ss.edi)
387 #define EBP_sig(context) ((context)->uc_mcontext->ss.ebp)
388 #define CS_sig(context) ((context)->uc_mcontext->ss.cs)
389 #define DS_sig(context) ((context)->uc_mcontext->ss.ds)
390 #define ES_sig(context) ((context)->uc_mcontext->ss.es)
391 #define FS_sig(context) ((context)->uc_mcontext->ss.fs)
392 #define GS_sig(context) ((context)->uc_mcontext->ss.gs)
393 #define SS_sig(context) ((context)->uc_mcontext->ss.ss)
394 #define EFL_sig(context) ((context)->uc_mcontext->ss.eflags)
395 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip))
396 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.esp))
397 #define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
398 #define ERROR_sig(context) ((context)->uc_mcontext->es.err)
399 #define FPU_sig(context) NULL
400 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->fs.fpu_fcw)
401 #endif
402
403 #elif defined(__NetBSD__)
404 # include <sys/ucontext.h>
405 # include <sys/types.h>
406 # include <signal.h>
407
408 typedef ucontext_t SIGCONTEXT;
409
410 #define EAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EAX])
411 #define EBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBX])
412 #define ECX_sig(context) ((context)->uc_mcontext.__gregs[_REG_ECX])
413 #define EDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDX])
414 #define ESI_sig(context) ((context)->uc_mcontext.__gregs[_REG_ESI])
415 #define EDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDI])
416 #define EBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBP])
417 #define ESP_sig(context) _UC_MACHINE_SP(context)
418
419 #define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
420 #define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
421 #define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
422 #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
423 #define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
424 #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
425
426 #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_EFL])
427 #define EIP_sig(context) _UC_MACHINE_PC(context)
428 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
429 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
430
431 #define FPU_sig(context) NULL
432 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&((context)->uc_mcontext.__fpregs))
433
434 #define T_MCHK T_MCA
435 #define T_XMMFLT T_XMM
436
437 #else
438 #error You must define the signal context functions for your platform
439 #endif /* linux */
440
441 WINE_DEFAULT_DEBUG_CHANNEL(seh);
442
443 typedef int (*wine_signal_handler)(unsigned int sig);
444
445 static const size_t teb_size = 4096; /* we reserve one page for the TEB */
446 static size_t signal_stack_mask;
447 static size_t signal_stack_size;
448
449 static wine_signal_handler handlers[256];
450
451 static BOOL fpux_support; /* whether the CPU supports extended fpu context */
452
453 extern void DECLSPEC_NORETURN __wine_restore_regs( const CONTEXT *context );
454
455 enum i386_trap_code
456 {
457 TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
458 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
459 TRAP_x86_DIVIDE = T_DIVIDE, /* Division by zero exception */
460 TRAP_x86_TRCTRAP = T_TRCTRAP, /* Single-step exception */
461 TRAP_x86_NMI = T_NMI, /* NMI interrupt */
462 TRAP_x86_BPTFLT = T_BPTFLT, /* Breakpoint exception */
463 TRAP_x86_OFLOW = T_OFLOW, /* Overflow exception */
464 TRAP_x86_BOUND = T_BOUND, /* Bound range exception */
465 TRAP_x86_PRIVINFLT = T_PRIVINFLT, /* Invalid opcode exception */
466 TRAP_x86_DNA = T_DNA, /* Device not available exception */
467 TRAP_x86_DOUBLEFLT = T_DOUBLEFLT, /* Double fault exception */
468 TRAP_x86_FPOPFLT = T_FPOPFLT, /* Coprocessor segment overrun */
469 TRAP_x86_TSSFLT = T_TSSFLT, /* Invalid TSS exception */
470 TRAP_x86_SEGNPFLT = T_SEGNPFLT, /* Segment not present exception */
471 TRAP_x86_STKFLT = T_STKFLT, /* Stack fault */
472 TRAP_x86_PROTFLT = T_PROTFLT, /* General protection fault */
473 TRAP_x86_PAGEFLT = T_PAGEFLT, /* Page fault */
474 TRAP_x86_ARITHTRAP = T_ARITHTRAP, /* Floating point exception */
475 TRAP_x86_ALIGNFLT = T_ALIGNFLT, /* Alignment check exception */
476 TRAP_x86_MCHK = T_MCHK, /* Machine check exception */
477 TRAP_x86_CACHEFLT = T_XMMFLT /* Cache flush exception */
478 #else
479 TRAP_x86_DIVIDE = 0, /* Division by zero exception */
480 TRAP_x86_TRCTRAP = 1, /* Single-step exception */
481 TRAP_x86_NMI = 2, /* NMI interrupt */
482 TRAP_x86_BPTFLT = 3, /* Breakpoint exception */
483 TRAP_x86_OFLOW = 4, /* Overflow exception */
484 TRAP_x86_BOUND = 5, /* Bound range exception */
485 TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */
486 TRAP_x86_DNA = 7, /* Device not available exception */
487 TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */
488 TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */
489 TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */
490 TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */
491 TRAP_x86_STKFLT = 12, /* Stack fault */
492 TRAP_x86_PROTFLT = 13, /* General protection fault */
493 TRAP_x86_PAGEFLT = 14, /* Page fault */
494 TRAP_x86_ARITHTRAP = 16, /* Floating point exception */
495 TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */
496 TRAP_x86_MCHK = 18, /* Machine check exception */
497 TRAP_x86_CACHEFLT = 19 /* SIMD exception (via SIGFPE) if CPU is SSE capable
498 otherwise Cache flush exception (via SIGSEV) */
499 #endif
500 };
501
502 /* Exception record for handling exceptions happening inside exception handlers */
503 typedef struct
504 {
505 EXCEPTION_REGISTRATION_RECORD frame;
506 EXCEPTION_REGISTRATION_RECORD *prevFrame;
507 } EXC_NESTED_FRAME;
508
509 extern DWORD EXC_CallHandler( EXCEPTION_RECORD *record, EXCEPTION_REGISTRATION_RECORD *frame,
510 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher,
511 PEXCEPTION_HANDLER handler, PEXCEPTION_HANDLER nested_handler );
512
513 /***********************************************************************
514 * dispatch_signal
515 */
516 static inline int dispatch_signal(unsigned int sig)
517 {
518 if (handlers[sig] == NULL) return 0;
519 return handlers[sig](sig);
520 }
521
522
523 /***********************************************************************
524 * get_trap_code
525 *
526 * Get the trap code for a signal.
527 */
528 static inline enum i386_trap_code get_trap_code( const SIGCONTEXT *sigcontext )
529 {
530 #ifdef TRAP_sig
531 return TRAP_sig(sigcontext);
532 #else
533 return TRAP_x86_UNKNOWN; /* unknown trap code */
534 #endif
535 }
536
537 /***********************************************************************
538 * get_error_code
539 *
540 * Get the error code for a signal.
541 */
542 static inline WORD get_error_code( const SIGCONTEXT *sigcontext )
543 {
544 #ifdef ERROR_sig
545 return ERROR_sig(sigcontext);
546 #else
547 return 0;
548 #endif
549 }
550
551 /***********************************************************************
552 * get_signal_stack
553 *
554 * Get the base of the signal stack for the current thread.
555 */
556 static inline void *get_signal_stack(void)
557 {
558 return (char *)NtCurrentTeb() + 4096;
559 }
560
561
562 /***********************************************************************
563 * get_current_teb
564 *
565 * Get the current teb based on the stack pointer.
566 */
567 static inline TEB *get_current_teb(void)
568 {
569 unsigned long esp;
570 __asm__("movl %%esp,%0" : "=g" (esp) );
571 return (TEB *)(esp & ~signal_stack_mask);
572 }
573
574
575 /*******************************************************************
576 * is_valid_frame
577 */
578 static inline BOOL is_valid_frame( void *frame )
579 {
580 if ((ULONG_PTR)frame & 3) return FALSE;
581 return (frame >= NtCurrentTeb()->Tib.StackLimit &&
582 (void **)frame < (void **)NtCurrentTeb()->Tib.StackBase - 1);
583 }
584
585 /*******************************************************************
586 * raise_handler
587 *
588 * Handler for exceptions happening inside a handler.
589 */
590 static DWORD raise_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
591 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
592 {
593 if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
594 return ExceptionContinueSearch;
595 /* We shouldn't get here so we store faulty frame in dispatcher */
596 *dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame;
597 return ExceptionNestedException;
598 }
599
600
601 /*******************************************************************
602 * unwind_handler
603 *
604 * Handler for exceptions happening inside an unwind handler.
605 */
606 static DWORD unwind_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
607 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
608 {
609 if (!(rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)))
610 return ExceptionContinueSearch;
611 /* We shouldn't get here so we store faulty frame in dispatcher */
612 *dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame;
613 return ExceptionCollidedUnwind;
614 }
615
616
617 /**********************************************************************
618 * call_stack_handlers
619 *
620 * Call the stack handlers chain.
621 */
622 static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *context )
623 {
624 EXCEPTION_REGISTRATION_RECORD *frame, *dispatch, *nested_frame;
625 DWORD res;
626
627 frame = NtCurrentTeb()->Tib.ExceptionList;
628 nested_frame = NULL;
629 while (frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL)
630 {
631 /* Check frame address */
632 if (!is_valid_frame( frame ))
633 {
634 rec->ExceptionFlags |= EH_STACK_INVALID;
635 break;
636 }
637
638 /* Call handler */
639 TRACE( "calling handler at %p code=%x flags=%x\n",
640 frame->Handler, rec->ExceptionCode, rec->ExceptionFlags );
641 res = EXC_CallHandler( rec, frame, context, &dispatch, frame->Handler, raise_handler );
642 TRACE( "handler at %p returned %x\n", frame->Handler, res );
643
644 if (frame == nested_frame)
645 {
646 /* no longer nested */
647 nested_frame = NULL;
648 rec->ExceptionFlags &= ~EH_NESTED_CALL;
649 }
650
651 switch(res)
652 {
653 case ExceptionContinueExecution:
654 if (!(rec->ExceptionFlags & EH_NONCONTINUABLE)) return STATUS_SUCCESS;
655 return STATUS_NONCONTINUABLE_EXCEPTION;
656 case ExceptionContinueSearch:
657 break;
658 case ExceptionNestedException:
659 if (nested_frame < dispatch) nested_frame = dispatch;
660 rec->ExceptionFlags |= EH_NESTED_CALL;
661 break;
662 default:
663 return STATUS_INVALID_DISPOSITION;
664 }
665 frame = frame->Prev;
666 }
667 return STATUS_UNHANDLED_EXCEPTION;
668 }
669
670
671 /*******************************************************************
672 * raise_exception
673 *
674 * Implementation of NtRaiseException.
675 */
676 static NTSTATUS raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
677 {
678 NTSTATUS status;
679
680 if (first_chance)
681 {
682 DWORD c;
683
684 TRACE( "code=%x flags=%x addr=%p ip=%08x tid=%04x\n",
685 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
686 context->Eip, GetCurrentThreadId() );
687 for (c = 0; c < rec->NumberParameters; c++)
688 TRACE( " info[%d]=%08lx\n", c, rec->ExceptionInformation[c] );
689 if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
690 {
691 if (rec->ExceptionInformation[1] >> 16)
692 MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
693 rec->ExceptionAddress,
694 (char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
695 else
696 MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
697 rec->ExceptionAddress,
698 (char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
699 }
700 else
701 {
702 TRACE(" eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n",
703 context->Eax, context->Ebx, context->Ecx,
704 context->Edx, context->Esi, context->Edi );
705 TRACE(" ebp=%08x esp=%08x cs=%04x ds=%04x es=%04x fs=%04x gs=%04x flags=%08x\n",
706 context->Ebp, context->Esp, context->SegCs, context->SegDs,
707 context->SegEs, context->SegFs, context->SegGs, context->EFlags );
708 }
709 status = send_debug_event( rec, TRUE, context );
710 if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
711 return STATUS_SUCCESS;
712
713 /* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
714 if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context->Eip--;
715
716 if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION)
717 return STATUS_SUCCESS;
718
719 if ((status = call_stack_handlers( rec, context )) != STATUS_UNHANDLED_EXCEPTION)
720 return status;
721 }
722
723 /* last chance exception */
724
725 status = send_debug_event( rec, FALSE, context );
726 if (status != DBG_CONTINUE)
727 {
728 if (rec->ExceptionFlags & EH_STACK_INVALID)
729 WINE_ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
730 else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
731 WINE_ERR("Process attempted to continue execution after noncontinuable exception.\n");
732 else
733 WINE_ERR("Unhandled exception code %x flags %x addr %p\n",
734 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
735 NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode );
736 }
737 return STATUS_SUCCESS;
738 }
739
740
741 #ifdef __HAVE_VM86
742 /***********************************************************************
743 * save_vm86_context
744 *
745 * Set the register values from a vm86 structure.
746 */
747 static void save_vm86_context( CONTEXT *context, const struct vm86plus_struct *vm86 )
748 {
749 context->ContextFlags = CONTEXT_FULL;
750 context->Eax = vm86->regs.eax;
751 context->Ebx = vm86->regs.ebx;
752 context->Ecx = vm86->regs.ecx;
753 context->Edx = vm86->regs.edx;
754 context->Esi = vm86->regs.esi;
755 context->Edi = vm86->regs.edi;
756 context->Esp = vm86->regs.esp;
757 context->Ebp = vm86->regs.ebp;
758 context->Eip = vm86->regs.eip;
759 context->SegCs = vm86->regs.cs;
760 context->SegDs = vm86->regs.ds;
761 context->SegEs = vm86->regs.es;
762 context->SegFs = vm86->regs.fs;
763 context->SegGs = vm86->regs.gs;
764 context->SegSs = vm86->regs.ss;
765 context->EFlags = vm86->regs.eflags;
766 }
767
768
769 /***********************************************************************
770 * restore_vm86_context
771 *
772 * Build a vm86 structure from the register values.
773 */
774 static void restore_vm86_context( const CONTEXT *context, struct vm86plus_struct *vm86 )
775 {
776 vm86->regs.eax = context->Eax;
777 vm86->regs.ebx = context->Ebx;
778 vm86->regs.ecx = context->Ecx;
779 vm86->regs.edx = context->Edx;
780 vm86->regs.esi = context->Esi;
781 vm86->regs.edi = context->Edi;
782 vm86->regs.esp = context->Esp;
783 vm86->regs.ebp = context->Ebp;
784 vm86->regs.eip = context->Eip;
785 vm86->regs.cs = context->SegCs;
786 vm86->regs.ds = context->SegDs;
787 vm86->regs.es = context->SegEs;
788 vm86->regs.fs = context->SegFs;
789 vm86->regs.gs = context->SegGs;
790 vm86->regs.ss = context->SegSs;
791 vm86->regs.eflags = context->EFlags;
792 }
793
794
795 /**********************************************************************
796 * merge_vm86_pending_flags
797 *
798 * Merges TEB.vm86_ptr and TEB.vm86_pending VIP flags and
799 * raises exception if there are pending events and VIF flag
800 * has been turned on.
801 *
802 * Called from __wine_enter_vm86 because vm86_enter
803 * doesn't check for pending events.
804 *
805 * Called from raise_vm86_sti_exception to check for
806 * pending events in a signal safe way.
807 */
808 static void merge_vm86_pending_flags( EXCEPTION_RECORD *rec )
809 {
810 BOOL check_pending = TRUE;
811 struct vm86plus_struct *vm86 =
812 (struct vm86plus_struct*)(ntdll_get_thread_data()->vm86_ptr);
813
814 /*
815 * In order to prevent a race when SIGUSR2 occurs while
816 * we are returning from exception handler, pending events
817 * will be rechecked after each raised exception.
818 */
819 while (check_pending && get_vm86_teb_info()->vm86_pending)
820 {
821 check_pending = FALSE;
822 ntdll_get_thread_data()->vm86_ptr = NULL;
823
824 /*
825 * If VIF is set, throw exception.
826 * Note that SIGUSR2 may turn VIF flag off so
827 * VIF check must occur only when TEB.vm86_ptr is NULL.
828 */
829 if (vm86->regs.eflags & VIF_FLAG)
830 {
831 CONTEXT vcontext;
832 save_vm86_context( &vcontext, vm86 );
833
834 rec->ExceptionCode = EXCEPTION_VM86_STI;
835 rec->ExceptionFlags = EXCEPTION_CONTINUABLE;
836 rec->ExceptionRecord = NULL;
837 rec->NumberParameters = 0;
838 rec->ExceptionAddress = (LPVOID)vcontext.Eip;
839
840 vcontext.EFlags &= ~VIP_FLAG;
841 get_vm86_teb_info()->vm86_pending = 0;
842 raise_exception( rec, &vcontext, TRUE );
843
844 restore_vm86_context( &vcontext, vm86 );
845 check_pending = TRUE;
846 }
847
848 ntdll_get_thread_data()->vm86_ptr = vm86;
849 }
850
851 /*
852 * Merge VIP flags in a signal safe way. This requires
853 * that the following operation compiles into atomic
854 * instruction.
855 */
856 vm86->regs.eflags |= get_vm86_teb_info()->vm86_pending;
857 }
858 #endif /* __HAVE_VM86 */
859
860
861 #ifdef __sun
862
863 /* We have to workaround two Solaris breakages:
864 * - Solaris doesn't restore %ds and %es before calling the signal handler so exceptions in 16-bit
865 * code crash badly.
866 * - Solaris inserts a libc trampoline to call our handler, but the trampoline expects that registers
867 * are setup correctly. So we need to insert our own trampoline below the libc trampoline to set %gs.
868 */
869
870 extern int sigaction_syscall( int sig, const struct sigaction *new, struct sigaction *old );
871 __ASM_GLOBAL_FUNC( sigaction_syscall,
872 "movl $0x62,%eax\n\t"
873 "int $0x91\n\t"
874 "ret" )
875
876 /* assume the same libc handler is used for all signals */
877 static void (*libc_sigacthandler)( int signal, siginfo_t *siginfo, void *context );
878
879 static void wine_sigacthandler( int signal, siginfo_t *siginfo, void *sigcontext )
880 {
881 struct ntdll_thread_data *thread_data;
882
883 __asm__ __volatile__("mov %ss,%ax; mov %ax,%ds; mov %ax,%es");
884
885 thread_data = (struct ntdll_thread_data *)get_current_teb()->SpareBytes1;
886 wine_set_fs( thread_data->fs );
887 wine_set_gs( thread_data->gs );
888
889 libc_sigacthandler( signal, siginfo, sigcontext );
890 }
891
892 static int solaris_sigaction( int sig, const struct sigaction *new, struct sigaction *old )
893 {
894 struct sigaction real_act;
895
896 if (sigaction( sig, new, old ) == -1) return -1;
897
898 /* retrieve the real handler and flags with a direct syscall */
899 sigaction_syscall( sig, NULL, &real_act );
900 libc_sigacthandler = real_act.sa_sigaction;
901 real_act.sa_sigaction = wine_sigacthandler;
902 sigaction_syscall( sig, &real_act, NULL );
903 return 0;
904 }
905 #define sigaction(sig,new,old) solaris_sigaction(sig,new,old)
906
907 #endif
908
909 typedef void (WINAPI *raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context );
910
911 extern void clear_alignment_flag(void);
912 __ASM_GLOBAL_FUNC( clear_alignment_flag,
913 "pushfl\n\t"
914 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
915 "andl $~0x40000,(%esp)\n\t"
916 "popfl\n\t"
917 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
918 "ret" )
919
920
921 /***********************************************************************
922 * init_handler
923 *
924 * Handler initialization when the full context is not needed.
925 * Return the stack pointer to use for pushing the exception data.
926 */
927 static inline void *init_handler( const SIGCONTEXT *sigcontext, WORD *fs, WORD *gs )
928 {
929 TEB *teb = get_current_teb();
930
931 clear_alignment_flag();
932
933 /* get %fs and %gs at time of the fault */
934 #ifdef FS_sig
935 *fs = LOWORD(FS_sig(sigcontext));
936 #else
937 *fs = wine_get_fs();
938 #endif
939 #ifdef GS_sig
940 *gs = LOWORD(GS_sig(sigcontext));
941 #else
942 *gs = wine_get_gs();
943 #endif
944
945 #ifndef __sun /* see above for Solaris handling */
946 {
947 struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)teb->SpareBytes1;
948 wine_set_fs( thread_data->fs );
949 wine_set_gs( thread_data->gs );
950 }
951 #endif
952
953 if (!wine_ldt_is_system(CS_sig(sigcontext)) ||
954 !wine_ldt_is_system(SS_sig(sigcontext))) /* 16-bit mode */
955 {
956 /*
957 * Win16 or DOS protected mode. Note that during switch
958 * from 16-bit mode to linear mode, CS may be set to system
959 * segment before FS is restored. Fortunately, in this case
960 * SS is still non-system segment. This is why both CS and SS
961 * are checked.
962 */
963 return teb->WOW32Reserved;
964 }
965 return (void *)(ESP_sig(sigcontext) & ~3);
966 }
967
968
969 /***********************************************************************
970 * save_fpu
971 *
972 * Save the thread FPU context.
973 */
974 static inline void save_fpu( CONTEXT *context )
975 {
976 #ifdef __GNUC__
977 context->ContextFlags |= CONTEXT_FLOATING_POINT;
978 __asm__ __volatile__( "fnsave %0; fwait" : "=m" (context->FloatSave) );
979 #endif
980 }
981
982
983 /***********************************************************************
984 * save_fpux
985 *
986 * Save the thread FPU extended context.
987 */
988 static inline void save_fpux( CONTEXT *context )
989 {
990 #ifdef __GNUC__
991 /* we have to enforce alignment by hand */
992 char buffer[sizeof(XMM_SAVE_AREA32) + 16];
993 XMM_SAVE_AREA32 *state = (XMM_SAVE_AREA32 *)(((ULONG_PTR)buffer + 15) & ~15);
994
995 __asm__ __volatile__( "fxsave %0" : "=m" (*state) );
996 context->ContextFlags |= CONTEXT_EXTENDED_REGISTERS;
997 memcpy( context->ExtendedRegisters, state, sizeof(*state) );
998 #endif
999 }
1000
1001
1002 /***********************************************************************
1003 * restore_fpu
1004 *
1005 * Restore the FPU context to a sigcontext.
1006 */
1007 static inline void restore_fpu( const CONTEXT *context )
1008 {
1009 FLOATING_SAVE_AREA float_status = context->FloatSave;
1010 /* reset the current interrupt status */
1011 float_status.StatusWord &= float_status.ControlWord | 0xffffff80;
1012 #ifdef __GNUC__
1013 __asm__ __volatile__( "frstor %0; fwait" : : "m" (float_status) );
1014 #endif /* __GNUC__ */
1015 }
1016
1017
1018 /***********************************************************************
1019 * restore_fpux
1020 *
1021 * Restore the FPU extended context to a sigcontext.
1022 */
1023 static inline void restore_fpux( const CONTEXT *context )
1024 {
1025 #ifdef __GNUC__
1026 /* we have to enforce alignment by hand */
1027 char buffer[sizeof(XMM_SAVE_AREA32) + 16];
1028 XMM_SAVE_AREA32 *state = (XMM_SAVE_AREA32 *)(((ULONG_PTR)buffer + 15) & ~15);
1029
1030 memcpy( state, context->ExtendedRegisters, sizeof(*state) );
1031 /* reset the current interrupt status */
1032 state->StatusWord &= state->ControlWord | 0xff80;
1033 __asm__ __volatile__( "fxrstor %0" : : "m" (*state) );
1034 #endif
1035 }
1036
1037
1038 /***********************************************************************
1039 * fpux_to_fpu
1040 *
1041 * Build a standard FPU context from an extended one.
1042 */
1043 static void fpux_to_fpu( FLOATING_SAVE_AREA *fpu, const XMM_SAVE_AREA32 *fpux )
1044 {
1045 unsigned int i, tag, stack_top;
1046
1047 fpu->ControlWord = fpux->ControlWord | 0xffff0000;
1048 fpu->StatusWord = fpux->StatusWord | 0xffff0000;
1049 fpu->ErrorOffset = fpux->ErrorOffset;
1050 fpu->ErrorSelector = fpux->ErrorSelector | (fpux->ErrorOpcode << 16);
1051 fpu->DataOffset = fpux->DataOffset;
1052 fpu->DataSelector = fpux->DataSelector;
1053 fpu->Cr0NpxState = fpux->StatusWord | 0xffff0000;
1054
1055 stack_top = (fpux->StatusWord >> 11) & 7;
1056 fpu->TagWord = 0xffff0000;
1057 for (i = 0; i < 8; i++)
1058 {
1059 memcpy( &fpu->RegisterArea[10 * i], &fpux->FloatRegisters[i], 10 );
1060 if (!(fpux->TagWord & (1 << i))) tag = 3; /* empty */
1061 else
1062 {
1063 const M128A *reg = &fpux->FloatRegisters[(i - stack_top) & 7];
1064 if ((reg->High & 0x7fff) == 0x7fff) /* exponent all ones */
1065 {
1066 tag = 2; /* special */
1067 }
1068 else if (!(reg->High & 0x7fff)) /* exponent all zeroes */
1069 {
1070 if (reg->Low) tag = 2; /* special */
1071 else tag = 1; /* zero */
1072 }
1073 else
1074 {
1075 if (reg->Low >> 63) tag = 0; /* valid */
1076 else tag = 2; /* special */
1077 }
1078 }
1079 fpu->TagWord |= tag << (2 * i);
1080 }
1081 }
1082
1083
1084 /***********************************************************************
1085 * save_context
1086 *
1087 * Build a context structure from the signal info.
1088 */
1089 static inline void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext, WORD fs, WORD gs )
1090 {
1091 struct ntdll_thread_data * const regs = ntdll_get_thread_data();
1092 FLOATING_SAVE_AREA *fpu = FPU_sig(sigcontext);
1093 XMM_SAVE_AREA32 *fpux = FPUX_sig(sigcontext);
1094
1095 memset(context, 0, sizeof(*context));
1096 context->ContextFlags = CONTEXT_FULL | CONTEXT_DEBUG_REGISTERS;
1097 context->Eax = EAX_sig(sigcontext);
1098 context->Ebx = EBX_sig(sigcontext);
1099 context->Ecx = ECX_sig(sigcontext);
1100 context->Edx = EDX_sig(sigcontext);
1101 context->Esi = ESI_sig(sigcontext);
1102 context->Edi = EDI_sig(sigcontext);
1103 context->Ebp = EBP_sig(sigcontext);
1104 context->EFlags = EFL_sig(sigcontext);
1105 context->Eip = EIP_sig(sigcontext);
1106 context->Esp = ESP_sig(sigcontext);
1107 context->SegCs = LOWORD(CS_sig(sigcontext));
1108 context->SegDs = LOWORD(DS_sig(sigcontext));
1109 context->SegEs = LOWORD(ES_sig(sigcontext));
1110 context->SegFs = fs;
1111 context->SegGs = gs;
1112 context->SegSs = LOWORD(SS_sig(sigcontext));
1113 context->Dr0 = regs->dr0;
1114 context->Dr1 = regs->dr1;
1115 context->Dr2 = regs->dr2;
1116 context->Dr3 = regs->dr3;
1117 context->Dr6 = regs->dr6;
1118 context->Dr7 = regs->dr7;
1119
1120 if (fpu)
1121 {
1122 context->ContextFlags |= CONTEXT_FLOATING_POINT;
1123 context->FloatSave = *fpu;
1124 }
1125 if (fpux)
1126 {
1127 context->ContextFlags |= CONTEXT_FLOATING_POINT | CONTEXT_EXTENDED_REGISTERS;
1128 memcpy( context->ExtendedRegisters, fpux, sizeof(*fpux) );
1129 fpux_support = TRUE;
1130 if (!fpu) fpux_to_fpu( &context->FloatSave, fpux );
1131 }
1132 if (!fpu && !fpux) save_fpu( context );
1133 }
1134
1135
1136 /***********************************************************************
1137 * restore_context
1138 *
1139 * Restore the signal info from the context.
1140 */
1141 static inline void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
1142 {
1143 struct ntdll_thread_data * const regs = ntdll_get_thread_data();
1144 FLOATING_SAVE_AREA *fpu = FPU_sig(sigcontext);
1145 XMM_SAVE_AREA32 *fpux = FPUX_sig(sigcontext);
1146
1147 regs->dr0 = context->Dr0;
1148 regs->dr1 = context->Dr1;
1149 regs->dr2 = context->Dr2;
1150 regs->dr3 = context->Dr3;
1151 regs->dr6 = context->Dr6;
1152 regs->dr7 = context->Dr7;
1153 EAX_sig(sigcontext) = context->Eax;
1154 EBX_sig(sigcontext) = context->Ebx;
1155 ECX_sig(sigcontext) = context->Ecx;
1156 EDX_sig(sigcontext) = context->Edx;
1157 ESI_sig(sigcontext) = context->Esi;
1158 EDI_sig(sigcontext) = context->Edi;
1159 EBP_sig(sigcontext) = context->Ebp;
1160 EFL_sig(sigcontext) = context->EFlags;
1161 EIP_sig(sigcontext) = context->Eip;
1162 ESP_sig(sigcontext) = context->Esp;
1163 CS_sig(sigcontext) = context->SegCs;
1164 DS_sig(sigcontext) = context->SegDs;
1165 ES_sig(sigcontext) = context->SegEs;
1166 SS_sig(sigcontext) = context->SegSs;
1167 #ifdef GS_sig
1168 GS_sig(sigcontext) = context->SegGs;
1169 #else
1170 wine_set_gs( context->SegGs );
1171 #endif
1172 #ifdef FS_sig
1173 FS_sig(sigcontext) = context->SegFs;
1174 #else
1175 wine_set_fs( context->SegFs );
1176 #endif
1177
1178 if (fpu) *fpu = context->FloatSave;
1179 if (fpux) memcpy( fpux, context->ExtendedRegisters, sizeof(*fpux) );
1180 if (!fpu && !fpux) restore_fpu( context );
1181 }
1182
1183
1184 /***********************************************************************
1185 * RtlCaptureContext (NTDLL.@)
1186 */
1187 __ASM_STDCALL_FUNC( RtlCaptureContext, 4,
1188 "pushl %eax\n\t"
1189 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
1190 "movl 8(%esp),%eax\n\t" /* context */
1191 "movl $0x10007,(%eax)\n\t" /* context->ContextFlags */
1192 "movw %gs,0x8c(%eax)\n\t" /* context->SegGs */
1193 "movw %fs,0x90(%eax)\n\t" /* context->SegFs */
1194 "movw %es,0x94(%eax)\n\t" /* context->SegEs */
1195 "movw %ds,0x98(%eax)\n\t" /* context->SegDs */
1196 "movl %edi,0x9c(%eax)\n\t" /* context->Edi */
1197 "movl %esi,0xa0(%eax)\n\t" /* context->Esi */
1198 "movl %ebx,0xa4(%eax)\n\t" /* context->Ebx */
1199 "movl %edx,0xa8(%eax)\n\t" /* context->Edx */
1200 "movl %ecx,0xac(%eax)\n\t" /* context->Ecx */
1201 "movl %ebp,0xb4(%eax)\n\t" /* context->Ebp */
1202 "movl 4(%esp),%edx\n\t"
1203 "movl %edx,0xb8(%eax)\n\t" /* context->Eip */
1204 "movw %cs,0xbc(%eax)\n\t" /* context->SegCs */
1205 "pushfl\n\t"
1206 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
1207 "popl 0xc0(%eax)\n\t" /* context->EFlags */
1208 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
1209 "leal 8(%esp),%edx\n\t"
1210 "movl %edx,0xc4(%eax)\n\t" /* context->Esp */
1211 "movw %ss,0xc8(%eax)\n\t" /* context->SegSs */
1212 "popl 0xb0(%eax)\n\t" /* context->Eax */
1213 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
1214 "ret $4" )
1215
1216
1217 /***********************************************************************
1218 * set_cpu_context
1219 *
1220 * Set the new CPU context. Used by NtSetContextThread.
1221 */
1222 void set_cpu_context( const CONTEXT *context )
1223 {
1224 DWORD flags = context->ContextFlags & ~CONTEXT_i386;
1225
1226 if ((flags & CONTEXT_EXTENDED_REGISTERS) && fpux_support) restore_fpux( context );
1227 else if (flags & CONTEXT_FLOATING_POINT) restore_fpu( context );
1228
1229 if (flags & CONTEXT_DEBUG_REGISTERS)
1230 {
1231 ntdll_get_thread_data()->dr0 = context->Dr0;
1232 ntdll_get_thread_data()->dr1 = context->Dr1;
1233 ntdll_get_thread_data()->dr2 = context->Dr2;
1234 ntdll_get_thread_data()->dr3 = context->Dr3;
1235 ntdll_get_thread_data()->dr6 = context->Dr6;
1236 ntdll_get_thread_data()->dr7 = context->Dr7;
1237 }
1238 if (flags & CONTEXT_FULL)
1239 {
1240 if (!(flags & CONTEXT_CONTROL))
1241 FIXME( "setting partial context (%x) not supported\n", flags );
1242 else if (flags & CONTEXT_SEGMENTS)
1243 __wine_restore_regs( context );
1244 else
1245 {
1246 CONTEXT newcontext = *context;
1247 newcontext.SegDs = wine_get_ds();
1248 newcontext.SegEs = wine_get_es();
1249 newcontext.SegFs = wine_get_fs();
1250 newcontext.SegGs = wine_get_gs();
1251 __wine_restore_regs( &newcontext );
1252 }
1253 }
1254 }
1255
1256
1257 /***********************************************************************
1258 * set_debug_registers
1259 */
1260 static void set_debug_registers( const CONTEXT *context )
1261 {
1262 DWORD flags = context->ContextFlags & ~CONTEXT_i386;
1263 context_t server_context;
1264
1265 if (!(flags & CONTEXT_DEBUG_REGISTERS)) return;
1266 if (ntdll_get_thread_data()->dr0 == context->Dr0 &&
1267 ntdll_get_thread_data()->dr1 == context->Dr1 &&
1268 ntdll_get_thread_data()->dr2 == context->Dr2 &&
1269 ntdll_get_thread_data()->dr3 == context->Dr3 &&
1270 ntdll_get_thread_data()->dr6 == context->Dr6 &&
1271 ntdll_get_thread_data()->dr7 == context->Dr7) return;
1272
1273 context_to_server( &server_context, context );
1274
1275 SERVER_START_REQ( set_thread_context )
1276 {
1277 req->handle = wine_server_obj_handle( GetCurrentThread() );
1278 req->suspend = 0;
1279 wine_server_add_data( req, &server_context, sizeof(server_context) );
1280 wine_server_call( req );
1281 }
1282 SERVER_END_REQ;
1283 }
1284
1285
1286 /***********************************************************************
1287 * copy_context
1288 *
1289 * Copy a register context according to the flags.
1290 */
1291 void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags )
1292 {
1293 flags &= ~CONTEXT_i386; /* get rid of CPU id */
1294 if (flags & CONTEXT_INTEGER)
1295 {
1296 to->Eax = from->Eax;
1297 to->Ebx = from->Ebx;
1298 to->Ecx = from->Ecx;
1299 to->Edx = from->Edx;
1300 to->Esi = from->Esi;
1301 to->Edi = from->Edi;
1302 }
1303 if (flags & CONTEXT_CONTROL)
1304 {
1305 to->Ebp = from->Ebp;
1306 to->Esp = from->Esp;
1307 to->Eip = from->Eip;
1308 to->SegCs = from->SegCs;
1309 to->SegSs = from->SegSs;
1310 to->EFlags = from->EFlags;
1311 }
1312 if (flags & CONTEXT_SEGMENTS)
1313 {
1314 to->SegDs = from->SegDs;
1315 to->SegEs = from->SegEs;
1316 to->SegFs = from->SegFs;
1317 to->SegGs = from->SegGs;
1318 }
1319 if (flags & CONTEXT_DEBUG_REGISTERS)
1320 {
1321 to->Dr0 = from->Dr0;
1322 to->Dr1 = from->Dr1;
1323 to->Dr2 = from->Dr2;
1324 to->Dr3 = from->Dr3;
1325 to->Dr6 = from->Dr6;
1326 to->Dr7 = from->Dr7;
1327 }
1328 if (flags & CONTEXT_FLOATING_POINT)
1329 {
1330 to->FloatSave = from->FloatSave;
1331 }
1332 if (flags & CONTEXT_EXTENDED_REGISTERS)
1333 {
1334 memcpy( to->ExtendedRegisters, from->ExtendedRegisters, sizeof(to->ExtendedRegisters) );
1335 }
1336 }
1337
1338
1339 /***********************************************************************
1340 * context_to_server
1341 *
1342 * Convert a register context to the server format.
1343 */
1344 NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
1345 {
1346 DWORD flags = from->ContextFlags & ~CONTEXT_i386; /* get rid of CPU id */
1347
1348 memset( to, 0, sizeof(*to) );
1349 to->cpu = CPU_x86;
1350
1351 if (flags & CONTEXT_CONTROL)
1352 {
1353 to->flags |= SERVER_CTX_CONTROL;
1354 to->ctl.i386_regs.ebp = from->Ebp;
1355 to->ctl.i386_regs.esp = from->Esp;
1356 to->ctl.i386_regs.eip = from->Eip;
1357 to->ctl.i386_regs.cs = from->SegCs;
1358 to->ctl.i386_regs.ss = from->SegSs;
1359 to->ctl.i386_regs.eflags = from->EFlags;
1360 }
1361 if (flags & CONTEXT_INTEGER)
1362 {
1363 to->flags |= SERVER_CTX_INTEGER;
1364 to->integer.i386_regs.eax = from->Eax;
1365 to->integer.i386_regs.ebx = from->Ebx;
1366 to->integer.i386_regs.ecx = from->Ecx;
1367 to->integer.i386_regs.edx = from->Edx;
1368 to->integer.i386_regs.esi = from->Esi;
1369 to->integer.i386_regs.edi = from->Edi;
1370 }
1371 if (flags & CONTEXT_SEGMENTS)
1372 {
1373 to->flags |= SERVER_CTX_SEGMENTS;
1374 to->seg.i386_regs.ds = from->SegDs;
1375 to->seg.i386_regs.es = from->SegEs;
1376 to->seg.i386_regs.fs = from->SegFs;
1377 to->seg.i386_regs.gs = from->SegGs;
1378 }
1379 if (flags & CONTEXT_FLOATING_POINT)
1380 {
1381 to->flags |= SERVER_CTX_FLOATING_POINT;
1382 to->fp.i386_regs.ctrl = from->FloatSave.ControlWord;
1383 to->fp.i386_regs.status = from->FloatSave.StatusWord;
1384 to->fp.i386_regs.tag = from->FloatSave.TagWord;
1385 to->fp.i386_regs.err_off = from->FloatSave.ErrorOffset;
1386 to->fp.i386_regs.err_sel = from->FloatSave.ErrorSelector;
1387 to->fp.i386_regs.data_off = from->FloatSave.DataOffset;
1388 to->fp.i386_regs.data_sel = from->FloatSave.DataSelector;
1389 to->fp.i386_regs.cr0npx = from->FloatSave.Cr0NpxState;
1390 memcpy( to->fp.i386_regs.regs, from->FloatSave.RegisterArea, sizeof(to->fp.i386_regs.regs) );
1391 }
1392 if (flags & CONTEXT_DEBUG_REGISTERS)
1393 {
1394 to->flags |= SERVER_CTX_DEBUG_REGISTERS;
1395 to->debug.i386_regs.dr0 = from->Dr0;
1396 to->debug.i386_regs.dr1 = from->Dr1;
1397 to->debug.i386_regs.dr2 = from->Dr2;
1398 to->debug.i386_regs.dr3 = from->Dr3;
1399 to->debug.i386_regs.dr6 = from->Dr6;
1400 to->debug.i386_regs.dr7 = from->Dr7;
1401 }
1402 if (flags & CONTEXT_EXTENDED_REGISTERS)
1403 {
1404 to->flags |= SERVER_CTX_EXTENDED_REGISTERS;
1405 memcpy( to->ext.i386_regs, from->ExtendedRegisters, sizeof(to->ext.i386_regs) );
1406 }
1407 return STATUS_SUCCESS;
1408 }
1409
1410
1411 /***********************************************************************
1412 * context_from_server
1413 *
1414 * Convert a register context from the server format.
1415 */
1416 NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
1417 {
1418 if (from->cpu != CPU_x86) return STATUS_INVALID_PARAMETER;
1419
1420 to->ContextFlags = CONTEXT_i386;
1421 if (from->flags & SERVER_CTX_CONTROL)
1422 {
1423 to->ContextFlags |= CONTEXT_CONTROL;
1424 to->Ebp = from->ctl.i386_regs.ebp;
1425 to->Esp = from->ctl.i386_regs.esp;
1426 to->Eip = from->ctl.i386_regs.eip;
1427 to->SegCs = from->ctl.i386_regs.cs;
1428 to->SegSs = from->ctl.i386_regs.ss;
1429 to->EFlags = from->ctl.i386_regs.eflags;
1430 }
1431 if (from->flags & SERVER_CTX_INTEGER)
1432 {
1433 to->ContextFlags |= CONTEXT_INTEGER;
1434 to->Eax = from->integer.i386_regs.eax;
1435 to->Ebx = from->integer.i386_regs.ebx;
1436 to->Ecx = from->integer.i386_regs.ecx;
1437 to->Edx = from->integer.i386_regs.edx;
1438 to->Esi = from->integer.i386_regs.esi;
1439 to->Edi = from->integer.i386_regs.edi;
1440 }
1441 if (from->flags & SERVER_CTX_SEGMENTS)
1442 {
1443 to->ContextFlags |= CONTEXT_SEGMENTS;
1444 to->SegDs = from->seg.i386_regs.ds;
1445 to->SegEs = from->seg.i386_regs.es;
1446 to->SegFs = from->seg.i386_regs.fs;
1447 to->SegGs = from->seg.i386_regs.gs;
1448 }
1449 if (from->flags & SERVER_CTX_FLOATING_POINT)
1450 {
1451 to->ContextFlags |= CONTEXT_FLOATING_POINT;
1452 to->FloatSave.ControlWord = from->fp.i386_regs.ctrl;
1453 to->FloatSave.StatusWord = from->fp.i386_regs.status;
1454 to->FloatSave.TagWord = from->fp.i386_regs.tag;
1455 to->FloatSave.ErrorOffset = from->fp.i386_regs.err_off;
1456 to->FloatSave.ErrorSelector = from->fp.i386_regs.err_sel;
1457 to->FloatSave.DataOffset = from->fp.i386_regs.data_off;
1458 to->FloatSave.DataSelector = from->fp.i386_regs.data_sel;
1459 to->FloatSave.Cr0NpxState = from->fp.i386_regs.cr0npx;
1460 memcpy( to->FloatSave.RegisterArea, from->fp.i386_regs.regs, sizeof(to->FloatSave.RegisterArea) );
1461 }
1462 if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
1463 {
1464 to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
1465 to->Dr0 = from->debug.i386_regs.dr0;
1466 to->Dr1 = from->debug.i386_regs.dr1;
1467 to->Dr2 = from->debug.i386_regs.dr2;
1468 to->Dr3 = from->debug.i386_regs.dr3;
1469 to->Dr6 = from->debug.i386_regs.dr6;
1470 to->Dr7 = from->debug.i386_regs.dr7;
1471 }
1472 if (from->flags & SERVER_CTX_EXTENDED_REGISTERS)
1473 {
1474 to->ContextFlags |= CONTEXT_EXTENDED_REGISTERS;
1475 memcpy( to->ExtendedRegisters, from->ext.i386_regs, sizeof(to->ExtendedRegisters) );
1476 }
1477 return STATUS_SUCCESS;
1478 }
1479
1480
1481 /***********************************************************************
1482 * is_privileged_instr
1483 *
1484 * Check if the fault location is a privileged instruction.
1485 * Based on the instruction emulation code in dlls/kernel/instr.c.
1486 */
1487 static inline DWORD is_privileged_instr( CONTEXT *context )
1488 {
1489 const BYTE *instr;
1490 unsigned int prefix_count = 0;
1491
1492 if (!wine_ldt_is_system( context->SegCs )) return 0;
1493 instr = (BYTE *)context->Eip;
1494
1495 for (;;) switch(*instr)
1496 {
1497 /* instruction prefixes */
1498 case 0x2e: /* %cs: */
1499 case 0x36: /* %ss: */
1500 case 0x3e: /* %ds: */
1501 case 0x26: /* %es: */
1502 case 0x64: /* %fs: */
1503 case 0x65: /* %gs: */
1504 case 0x66: /* opcode size */
1505 case 0x67: /* addr size */
1506 case 0xf0: /* lock */
1507 case 0xf2: /* repne */
1508 case 0xf3: /* repe */
1509 if (++prefix_count >= 15) return EXCEPTION_ILLEGAL_INSTRUCTION;
1510 instr++;
1511 continue;
1512
1513 case 0x0f: /* extended instruction */
1514 switch(instr[1])
1515 {
1516 case 0x20: /* mov crX, reg */
1517 case 0x21: /* mov drX, reg */
1518 case 0x22: /* mov reg, crX */
1519 case 0x23: /* mov reg drX */
1520 return EXCEPTION_PRIV_INSTRUCTION;
1521 }
1522 return 0;
1523 case 0x6c: /* insb (%dx) */
1524 case 0x6d: /* insl (%dx) */
1525 case 0x6e: /* outsb (%dx) */
1526 case 0x6f: /* outsl (%dx) */
1527 case 0xcd: /* int $xx */
1528 case 0xe4: /* inb al,XX */
1529 case 0xe5: /* in (e)ax,XX */
1530 case 0xe6: /* outb XX,al */
1531 case 0xe7: /* out XX,(e)ax */
1532 case 0xec: /* inb (%dx),%al */
1533 case 0xed: /* inl (%dx),%eax */
1534 case 0xee: /* outb %al,(%dx) */
1535 case 0xef: /* outl %eax,(%dx) */
1536 case 0xf4: /* hlt */
1537 case 0xfa: /* cli */
1538 case 0xfb: /* sti */
1539 return EXCEPTION_PRIV_INSTRUCTION;
1540 default:
1541 return 0;
1542 }
1543 }
1544
1545 /***********************************************************************
1546 * check_invalid_gs
1547 *
1548 * Check for fault caused by invalid %gs value (some copy protection schemes mess with it).
1549 */
1550 static inline BOOL check_invalid_gs( CONTEXT *context )
1551 {
1552 unsigned int prefix_count = 0;
1553 const BYTE *instr = (BYTE *)context->Eip;
1554 WORD system_gs = ntdll_get_thread_data()->gs;
1555
1556 if (context->SegGs == system_gs) return FALSE;
1557 if (!wine_ldt_is_system( context->SegCs )) return FALSE;
1558 /* only handle faults in system libraries */
1559 if (virtual_is_valid_code_address( instr, 1 )) return FALSE;
1560
1561 for (;;) switch(*instr)
1562 {
1563 /* instruction prefixes */
1564 case 0x2e: /* %cs: */
1565 case 0x36: /* %ss: */
1566 case 0x3e: /* %ds: */
1567 case 0x26: /* %es: */
1568 case 0x64: /* %fs: */
1569 case 0x66: /* opcode size */
1570 case 0x67: /* addr size */
1571 case 0xf0: /* lock */
1572 case 0xf2: /* repne */
1573 case 0xf3: /* repe */
1574 if (++prefix_count >= 15) return FALSE;
1575 instr++;
1576 continue;
1577 case 0x65: /* %gs: */
1578 TRACE( "%04x/%04x at %p, fixing up\n", context->SegGs, system_gs, instr );
1579 context->SegGs = system_gs;
1580 return TRUE;
1581 default:
1582 return FALSE;
1583 }
1584 }
1585
1586
1587 #include "pshpack1.h"
1588 struct atl_thunk
1589 {
1590 DWORD movl; /* movl this,4(%esp) */
1591 DWORD this;
1592 BYTE jmp; /* jmp func */
1593 int func;
1594 };
1595 #include "poppack.h"
1596
1597 /**********************************************************************
1598 * check_atl_thunk
1599 *
1600 * Check if code destination is an ATL thunk, and emulate it if so.
1601 */
1602 static BOOL check_atl_thunk( EXCEPTION_RECORD *rec, CONTEXT *context )
1603 {
1604 const struct atl_thunk *thunk = (const struct atl_thunk *)rec->ExceptionInformation[1];
1605 BOOL ret = FALSE;
1606
1607 if (!virtual_is_valid_code_address( thunk, sizeof(*thunk) )) return FALSE;
1608
1609 __TRY
1610 {
1611 if (thunk->movl == 0x042444c7 && thunk->jmp == 0xe9)
1612 {
1613 *((DWORD *)context->Esp + 1) = thunk->this;
1614 context->Eip = (DWORD_PTR)(&thunk->func + 1) + thunk->func;
1615 TRACE( "emulating ATL thunk at %p, func=%08x arg=%08x\n",
1616 thunk, context->Eip, *((DWORD *)context->Esp + 1) );
1617 ret = TRUE;
1618 }
1619 }
1620 __EXCEPT_PAGE_FAULT
1621 {
1622 return FALSE;
1623 }
1624 __ENDTRY
1625 return ret;
1626 }
1627
1628
1629 /***********************************************************************
1630 * setup_exception_record
1631 *
1632 * Setup the exception record and context on the thread stack.
1633 */
1634 static EXCEPTION_RECORD *setup_exception_record( SIGCONTEXT *sigcontext, void *stack_ptr,
1635 WORD fs, WORD gs, raise_func func )
1636 {
1637 struct stack_layout
1638 {
1639 void *ret_addr; /* return address from raise_func */
1640 EXCEPTION_RECORD *rec_ptr; /* first arg for raise_func */
1641 CONTEXT *context_ptr; /* second arg for raise_func */
1642 CONTEXT context;
1643 EXCEPTION_RECORD rec;
1644 DWORD ebp;
1645 DWORD eip;
1646 } *stack = stack_ptr;
1647 DWORD exception_code = 0;
1648
1649 /* stack sanity checks */
1650
1651 if ((char *)stack >= (char *)get_signal_stack() &&
1652 (char *)stack < (char *)get_signal_stack() + signal_stack_size)
1653 {
1654 WINE_ERR( "nested exception on signal stack in thread %04x eip %08x esp %08x stack %p-%p\n",
1655 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1656 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit,
1657 NtCurrentTeb()->Tib.StackBase );
1658 abort_thread(1);
1659 }
1660
1661 if (stack - 1 > stack || /* check for overflow in subtraction */
1662 (char *)stack <= (char *)NtCurrentTeb()->DeallocationStack ||
1663 (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase)
1664 {
1665 WARN( "exception outside of stack limits in thread %04x eip %08x esp %08x stack %p-%p\n",
1666 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1667 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit,
1668 NtCurrentTeb()->Tib.StackBase );
1669 }
1670 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->DeallocationStack + 4096)
1671 {
1672 /* stack overflow on last page, unrecoverable */
1673 UINT diff = (char *)NtCurrentTeb()->DeallocationStack + 4096 - (char *)(stack - 1);
1674 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1675 diff, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1676 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1677 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1678 abort_thread(1);
1679 }
1680 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit)
1681 {
1682 /* stack access below stack limit, may be recoverable */
1683 if (virtual_handle_stack_fault( stack - 1 )) exception_code = EXCEPTION_STACK_OVERFLOW;
1684 else
1685 {
1686 UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)(stack - 1);
1687 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1688 diff, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1689 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1690 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1691 abort_thread(1);
1692 }
1693 }
1694
1695 stack--; /* push the stack_layout structure */
1696 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
1697 VALGRIND_MAKE_MEM_UNDEFINED(stack, sizeof(*stack));
1698 #elif defined(VALGRIND_MAKE_WRITABLE)
1699 VALGRIND_MAKE_WRITABLE(stack, sizeof(*stack));
1700 #endif
1701 stack->ret_addr = (void *)0xdeadbabe; /* raise_func must not return */
1702 stack->rec_ptr = &stack->rec;
1703 stack->context_ptr = &stack->context;
1704
1705 stack->rec.ExceptionRecord = NULL;
1706 stack->rec.ExceptionCode = exception_code;
1707 stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
1708 stack->rec.ExceptionAddress = (LPVOID)EIP_sig(sigcontext);
1709 stack->rec.NumberParameters = 0;
1710
1711 save_context( &stack->context, sigcontext, fs, gs );
1712
1713 /* now modify the sigcontext to return to the raise function */
1714 ESP_sig(sigcontext) = (DWORD)stack;
1715 EIP_sig(sigcontext) = (DWORD)func;
1716 /* clear single-step, direction, and align check flag */
1717 EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000);
1718 CS_sig(sigcontext) = wine_get_cs();
1719 DS_sig(sigcontext) = wine_get_ds();
1720 ES_sig(sigcontext) = wine_get_es();
1721 FS_sig(sigcontext) = wine_get_fs();
1722 GS_sig(sigcontext) = wine_get_gs();
1723 SS_sig(sigcontext) = wine_get_ss();
1724
1725 return stack->rec_ptr;
1726 }
1727
1728
1729 /***********************************************************************
1730 * setup_exception
1731 *
1732 * Setup a proper stack frame for the raise function, and modify the
1733 * sigcontext so that the return from the signal handler will call
1734 * the raise function.
1735 */
1736 static EXCEPTION_RECORD *setup_exception( SIGCONTEXT *sigcontext, raise_func func )
1737 {
1738 WORD fs, gs;
1739 void *stack = init_handler( sigcontext, &fs, &gs );
1740
1741 return setup_exception_record( sigcontext, stack, fs, gs, func );
1742 }
1743
1744
1745 /***********************************************************************
1746 * get_exception_context
1747 *
1748 * Get a pointer to the context built by setup_exception.
1749 */
1750 static inline CONTEXT *get_exception_context( EXCEPTION_RECORD *rec )
1751 {
1752 return (CONTEXT *)rec - 1; /* cf. stack_layout structure */
1753 }
1754
1755
1756 /**********************************************************************
1757 * get_fpu_code
1758 *
1759 * Get the FPU exception code from the FPU status.
1760 */
1761 static inline DWORD get_fpu_code( const CONTEXT *context )
1762 {
1763 DWORD status = context->FloatSave.StatusWord & ~(context->FloatSave.ControlWord & 0x3f);
1764
1765 if (status & 0x01) /* IE */
1766 {
1767 if (status & 0x40) /* SF */
1768 return EXCEPTION_FLT_STACK_CHECK;
1769 else
1770 return EXCEPTION_FLT_INVALID_OPERATION;
1771 }
1772 if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
1773 if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
1774 if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
1775 if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
1776 if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
1777 return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
1778 }
1779
1780
1781 /**********************************************************************
1782 * raise_segv_exception
1783 */
1784 static void WINAPI raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1785 {
1786 NTSTATUS status;
1787
1788 switch(rec->ExceptionCode)
1789 {
1790 case EXCEPTION_ACCESS_VIOLATION:
1791 if (rec->NumberParameters == 2)
1792 {
1793 if (rec->ExceptionInformation[0] == EXCEPTION_EXECUTE_FAULT && check_atl_thunk( rec, context ))
1794 goto done;
1795 if (rec->ExceptionInformation[1] == 0xffffffff && check_invalid_gs( context ))
1796 goto done;
1797 if (!(rec->ExceptionCode = virtual_handle_fault( (void *)rec->ExceptionInformation[1],
1798 rec->ExceptionInformation[0] )))
1799 goto done;
1800 /* send EXCEPTION_EXECUTE_FAULT only if data execution prevention is enabled */
1801 if (rec->ExceptionInformation[0] == EXCEPTION_EXECUTE_FAULT)
1802 {
1803 ULONG flags;
1804 NtQueryInformationProcess( GetCurrentProcess(), ProcessExecuteFlags,
1805 &flags, sizeof(flags), NULL );
1806 if (!(flags & MEM_EXECUTE_OPTION_DISABLE))
1807 rec->ExceptionInformation[0] = EXCEPTION_READ_FAULT;
1808 }
1809 }
1810 break;
1811 case EXCEPTION_DATATYPE_MISALIGNMENT:
1812 /* FIXME: pass through exception handler first? */
1813 if (context->EFlags & 0x00040000)
1814 {
1815 /* Disable AC flag, return */
1816 context->EFlags &= ~0x00040000;
1817 goto done;
1818 }
1819 break;
1820 }
1821 status = NtRaiseException( rec, context, TRUE );
1822 raise_status( status, rec );
1823 done:
1824 set_cpu_context( context );
1825 }
1826
1827
1828 /**********************************************************************
1829 * raise_trap_exception
1830 */
1831 static void WINAPI raise_trap_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1832 {
1833 NTSTATUS status;
1834
1835 if (rec->ExceptionCode == EXCEPTION_SINGLE_STEP)
1836 {
1837 /* when single stepping can't tell whether this is a hw bp or a
1838 * single step interrupt. try to avoid as much overhead as possible
1839 * and only do a server call if there is any hw bp enabled. */
1840
1841 if( !(context->EFlags & 0x100) || (ntdll_get_thread_data()->dr7 & 0xff) )
1842 {
1843 /* (possible) hardware breakpoint, fetch the debug registers */
1844 context->ContextFlags = CONTEXT_DEBUG_REGISTERS;
1845 NtGetContextThread(GetCurrentThread(), context);
1846 context->ContextFlags |= CONTEXT_FULL; /* restore flags */
1847 }
1848
1849 context->EFlags &= ~0x100; /* clear single-step flag */
1850 }
1851
1852 status = NtRaiseException( rec, context, TRUE );
1853 raise_status( status, rec );
1854 }
1855
1856
1857 /**********************************************************************
1858 * raise_generic_exception
1859 *
1860 * Generic raise function for exceptions that don't need special treatment.
1861 */
1862 static void WINAPI raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1863 {
1864 NTSTATUS status;
1865
1866 status = NtRaiseException( rec, context, TRUE );
1867 raise_status( status, rec );
1868 }
1869
1870
1871 #ifdef __HAVE_VM86
1872 /**********************************************************************
1873 * raise_vm86_sti_exception
1874 */
1875 static void WINAPI raise_vm86_sti_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1876 {
1877 /* merge_vm86_pending_flags merges the vm86_pending flag in safely */
1878 get_vm86_teb_info()->vm86_pending |= VIP_FLAG;
1879
1880 if (ntdll_get_thread_data()->vm86_ptr)
1881 {
1882 if (((char*)context->Eip >= (char*)vm86_return) &&
1883 ((char*)context->Eip <= (char*)vm86_return_end) &&
1884 (VM86_TYPE(context->Eax) != VM86_SIGNAL)) {
1885 /* exiting from VM86, can't throw */
1886 goto done;
1887 }
1888 merge_vm86_pending_flags( rec );
1889 }
1890 else if (get_vm86_teb_info()->dpmi_vif &&
1891 !wine_ldt_is_system(context->SegCs) &&
1892 !wine_ldt_is_system(context->SegSs))
1893 {
1894 /* Executing DPMI code and virtual interrupts are enabled. */
1895 get_vm86_teb_info()->vm86_pending = 0;
1896 NtRaiseException( rec, context, TRUE );
1897 }
1898 done:
1899 set_cpu_context( context );
1900 }
1901
1902
1903 /**********************************************************************
1904 * usr2_handler
1905 *
1906 * Handler for SIGUSR2.
1907 * We use it to signal that the running __wine_enter_vm86() should
1908 * immediately set VIP_FLAG, causing pending events to be handled
1909 * as early as possible.
1910 */
1911 static void usr2_handler( int signal, siginfo_t *siginfo, void *sigcontext )
1912 {
1913 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_vm86_sti_exception );
1914 rec->ExceptionCode = EXCEPTION_VM86_STI;
1915 }
1916 #endif /* __HAVE_VM86 */
1917
1918
1919 /**********************************************************************
1920 * segv_handler
1921 *
1922 * Handler for SIGSEGV and related errors.
1923 */
1924 static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
1925 {
1926 WORD fs, gs;
1927 EXCEPTION_RECORD *rec;
1928 SIGCONTEXT *context = sigcontext;
1929 void *stack = init_handler( sigcontext, &fs, &gs );
1930
1931 /* check for page fault inside the thread stack */
1932 if (get_trap_code(context) == TRAP_x86_PAGEFLT &&
1933 (char *)siginfo->si_addr >= (char *)NtCurrentTeb()->DeallocationStack &&
1934 (char *)siginfo->si_addr < (char *)NtCurrentTeb()->Tib.StackBase &&
1935 virtual_handle_stack_fault( siginfo->si_addr ))
1936 {
1937 /* check if this was the last guard page */
1938 if ((char *)siginfo->si_addr < (char *)NtCurrentTeb()->DeallocationStack + 2*4096)
1939 {
1940 rec = setup_exception_record( context, stack, fs, gs, raise_segv_exception );
1941 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
1942 }
1943 return;
1944 }
1945
1946 rec = setup_exception_record( context, stack, fs, gs, raise_segv_exception );
1947 if (rec->ExceptionCode == EXCEPTION_STACK_OVERFLOW) return;
1948
1949 switch(get_trap_code(context))
1950 {
1951 case TRAP_x86_OFLOW: /* Overflow exception */
1952 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
1953 break;
1954 case TRAP_x86_BOUND: /* Bound range exception */
1955 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
1956 break;
1957 case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
1958 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
1959 break;
1960 case TRAP_x86_STKFLT: /* Stack fault */
1961 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
1962 break;
1963 case TRAP_x86_SEGNPFLT: /* Segment not present exception */
1964 case TRAP_x86_PROTFLT: /* General protection fault */
1965 case TRAP_x86_UNKNOWN: /* Unknown fault code */
1966 {
1967 WORD err = get_error_code(context);
1968 if (!err && (rec->ExceptionCode = is_privileged_instr( get_exception_context(rec) ))) break;
1969 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
1970 rec->NumberParameters = 2;
1971 rec->ExceptionInformation[0] = 0;
1972 /* if error contains a LDT selector, use that as fault address */
1973 if ((err & 7) == 4 && !wine_ldt_is_system( err | 7 ))
1974 rec->ExceptionInformation[1] = err & ~7;
1975 else
1976 rec->ExceptionInformation[1] = 0xffffffff;
1977 }
1978 break;
1979 case TRAP_x86_PAGEFLT: /* Page fault */
1980 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
1981 rec->NumberParameters = 2;
1982 rec->ExceptionInformation[0] = (get_error_code(context) >> 1) & 0x09;
1983 rec->ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
1984 break;
1985 case TRAP_x86_ALIGNFLT: /* Alignment check exception */
1986 rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
1987 break;
1988 default:
1989 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) );
1990 /* fall through */
1991 case TRAP_x86_NMI: /* NMI interrupt */
1992 case TRAP_x86_DNA: /* Device not available exception */
1993 case TRAP_x86_DOUBLEFLT: /* Double fault exception */
1994 case TRAP_x86_TSSFLT: /* Invalid TSS exception */
1995 case TRAP_x86_MCHK: /* Machine check exception */
1996 case TRAP_x86_CACHEFLT: /* Cache flush exception */
1997 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
1998 break;
1999 }
2000 }
2001
2002
2003 /**********************************************************************
2004 * trap_handler
2005 *
2006 * Handler for SIGTRAP.
2007 */
2008 static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2009 {
2010 SIGCONTEXT *context = sigcontext;
2011 EXCEPTION_RECORD *rec = setup_exception( context, raise_trap_exception );
2012
2013 switch(get_trap_code(context))
2014 {
2015 case TRAP_x86_TRCTRAP: /* Single-step exception */
2016 rec->ExceptionCode = EXCEPTION_SINGLE_STEP;
2017 break;
2018 case TRAP_x86_BPTFLT: /* Breakpoint exception */
2019 rec->ExceptionAddress = (char *)rec->ExceptionAddress - 1; /* back up over the int3 instruction */
2020 /* fall through */
2021 default:
2022 rec->ExceptionCode = EXCEPTION_BREAKPOINT;
2023 break;
2024 }
2025 }
2026
2027
2028 /**********************************************************************
2029 * fpe_handler
2030 *
2031 * Handler for SIGFPE.
2032 */
2033 static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2034 {
2035 CONTEXT *win_context;
2036 SIGCONTEXT *context = sigcontext;
2037 EXCEPTION_RECORD *rec = setup_exception( context, raise_generic_exception );
2038
2039 win_context = get_exception_context( rec );
2040
2041 switch(get_trap_code(context))
2042 {
2043 case TRAP_x86_DIVIDE: /* Division by zero exception */
2044 rec->ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
2045 break;
2046 case TRAP_x86_FPOPFLT: /* Coprocessor segment overrun */
2047 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2048 break;
2049 case TRAP_x86_ARITHTRAP: /* Floating point exception */
2050 case TRAP_x86_UNKNOWN: /* Unknown fault code */
2051 rec->ExceptionCode = get_fpu_code( win_context );
2052 rec->ExceptionAddress = (LPVOID)win_context->FloatSave.ErrorOffset;
2053 break;
2054 case TRAP_x86_CACHEFLT: /* SIMD exception */
2055 /* TODO:
2056 * Behaviour only tested for divide-by-zero exceptions
2057 * Check for other SIMD exceptions as well */
2058 if(siginfo->si_code != FPE_FLTDIV)
2059 FIXME("untested SIMD exception: %#x. Might not work correctly\n",
2060 siginfo->si_code);
2061
2062 rec->ExceptionCode = STATUS_FLOAT_MULTIPLE_TRAPS;
2063 rec->NumberParameters = 1;
2064 /* no idea what meaning is actually behind this but that's what native does */
2065 rec->ExceptionInformation[0] = 0;
2066 break;
2067 default:
2068 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) );
2069 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2070 break;
2071 }
2072 }
2073
2074
2075 /**********************************************************************
2076 * int_handler
2077 *
2078 * Handler for SIGINT.
2079 *
2080 * FIXME: should not be calling external functions on the signal stack.
2081 */
2082 static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2083 {
2084 WORD fs, gs;
2085 init_handler( sigcontext, &fs, &gs );
2086 if (!dispatch_signal(SIGINT))
2087 {
2088 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2089 rec->ExceptionCode = CONTROL_C_EXIT;
2090 }
2091 }
2092
2093 /**********************************************************************
2094 * abrt_handler
2095 *
2096 * Handler for SIGABRT.
2097 */
2098 static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2099 {
2100 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2101 rec->ExceptionCode = EXCEPTION_WINE_ASSERTION;
2102 rec->ExceptionFlags = EH_NONCONTINUABLE;
2103 }
2104
2105
2106 /**********************************************************************
2107 * quit_handler
2108 *
2109 * Handler for SIGQUIT.
2110 */
2111 static void quit_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2112 {
2113 WORD fs, gs;
2114 init_handler( sigcontext, &fs, &gs );
2115 abort_thread(0);
2116 }
2117
2118
2119 /**********************************************************************
2120 * usr1_handler
2121 *
2122 * Handler for SIGUSR1, used to signal a thread that it got suspended.
2123 */
2124 static void usr1_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2125 {
2126 CONTEXT context;
2127 WORD fs, gs;
2128
2129 init_handler( sigcontext, &fs, &gs );
2130 save_context( &context, sigcontext, fs, gs );
2131 wait_suspend( &context );
2132 restore_context( &context, sigcontext );
2133 }
2134
2135
2136 /***********************************************************************
2137 * __wine_set_signal_handler (NTDLL.@)
2138 */
2139 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
2140 {
2141 if (sig >= sizeof(handlers) / sizeof(handlers[0])) return -1;
2142 if (handlers[sig] != NULL) return -2;
2143 handlers[sig] = wsh;
2144 return 0;
2145 }
2146
2147
2148 /***********************************************************************
2149 * locking for LDT routines
2150 */
2151 static RTL_CRITICAL_SECTION ldt_section;
2152 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
2153 {
2154 0, 0, &ldt_section,
2155 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
2156 0, 0, { (DWORD_PTR)(__FILE__ ": ldt_section") }
2157 };
2158 static RTL_CRITICAL_SECTION ldt_section = { &critsect_debug, -1, 0, 0, 0, 0 };
2159 static sigset_t ldt_sigset;
2160
2161 static void ldt_lock(void)
2162 {
2163 sigset_t sigset;
2164
2165 pthread_sigmask( SIG_BLOCK, &server_block_set, &sigset );
2166 RtlEnterCriticalSection( &ldt_section );
2167 if (ldt_section.RecursionCount == 1) ldt_sigset = sigset;
2168 }
2169
2170 static void ldt_unlock(void)
2171 {
2172 if (ldt_section.RecursionCount == 1)
2173 {
2174 sigset_t sigset = ldt_sigset;
2175 RtlLeaveCriticalSection( &ldt_section );
2176 pthread_sigmask( SIG_SETMASK, &sigset, NULL );
2177 }
2178 else RtlLeaveCriticalSection( &ldt_section );
2179 }
2180
2181
2182 /**********************************************************************
2183 * signal_alloc_thread
2184 */
2185 NTSTATUS signal_alloc_thread( TEB **teb )
2186 {
2187 static size_t sigstack_zero_bits;
2188 struct ntdll_thread_data *thread_data;
2189 struct ntdll_thread_data *parent_data = NULL;
2190 SIZE_T size;
2191 void *addr = NULL;
2192 NTSTATUS status;
2193
2194 if (!sigstack_zero_bits)
2195 {
2196 size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 );
2197 /* find the first power of two not smaller than min_size */
2198 sigstack_zero_bits = 12;
2199 while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
2200 signal_stack_mask = (1 << sigstack_zero_bits) - 1;
2201 signal_stack_size = (1 << sigstack_zero_bits) - teb_size;
2202 }
2203 else parent_data = ntdll_get_thread_data();
2204
2205 size = signal_stack_mask + 1;
2206 if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), &addr, sigstack_zero_bits,
2207 &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
2208 {
2209 *teb = addr;
2210 (*teb)->Tib.Self = &(*teb)->Tib;
2211 (*teb)->Tib.ExceptionList = (void *)~0UL;
2212 thread_data = (struct ntdll_thread_data *)(*teb)->SpareBytes1;
2213 if (!(thread_data->fs = wine_ldt_alloc_fs()))
2214 {
2215 size = 0;
2216 NtFreeVirtualMemory( NtCurrentProcess(), &addr, &size, MEM_RELEASE );
2217 status = STATUS_TOO_MANY_THREADS;
2218 }
2219 if (parent_data)
2220 {
2221 /* inherit debug registers from parent thread */
2222 thread_data->dr0 = parent_data->dr0;
2223 thread_data->dr1 = parent_data->dr1;
2224 thread_data->dr2 = parent_data->dr2;
2225 thread_data->dr3 = parent_data->dr3;
2226 thread_data->dr6 = parent_data->dr6;
2227 thread_data->dr7 = parent_data->dr7;
2228 }
2229
2230 }
2231 return status;
2232 }
2233
2234
2235 /**********************************************************************
2236 * signal_free_thread
2237 */
2238 void signal_free_thread( TEB *teb )
2239 {
2240 SIZE_T size;
2241 struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)teb->SpareBytes1;
2242
2243 if (thread_data) wine_ldt_free_fs( thread_data->fs );
2244 if (teb->DeallocationStack)
2245 {
2246 size = 0;
2247 NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE );
2248 }
2249 size = 0;
2250 NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
2251 }
2252
2253
2254 /**********************************************************************
2255 * signal_init_thread
2256 */
2257 void signal_init_thread( TEB *teb )
2258 {
2259 const WORD fpu_cw = 0x27f;
2260 struct ntdll_thread_data *thread_data = (struct ntdll_thread_data *)teb->SpareBytes1;
2261 LDT_ENTRY fs_entry;
2262 stack_t ss;
2263
2264 #ifdef __APPLE__
2265 int mib[2], val = 1;
2266
2267 mib[0] = CTL_KERN;
2268 mib[1] = KERN_THALTSTACK;
2269 sysctl( mib, 2, NULL, NULL, &val, sizeof(val) );
2270 #endif
2271
2272 ss.ss_sp = (char *)teb + teb_size;
2273 ss.ss_size = signal_stack_size;
2274 ss.ss_flags = 0;
2275 if (sigaltstack(&ss, NULL) == -1) perror( "sigaltstack" );
2276
2277 wine_ldt_set_base( &fs_entry, teb );
2278 wine_ldt_set_limit( &fs_entry, teb_size - 1 );
2279 wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
2280 wine_ldt_init_fs( thread_data->fs, &fs_entry );
2281 thread_data->gs = wine_get_gs();
2282
2283 #ifdef __GNUC__
2284 __asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw));
2285 #else
2286 FIXME("FPU setup not implemented for this platform.\n");
2287 #endif
2288 }
2289
2290 /**********************************************************************
2291 * signal_init_process
2292 */
2293 void signal_init_process(void)
2294 {
2295 struct sigaction sig_act;
2296
2297 sig_act.sa_mask = server_block_set;
2298 sig_act.sa_flags = SA_SIGINFO | SA_RESTART;
2299 #ifdef SA_ONSTACK
2300 sig_act.sa_flags |= SA_ONSTACK;
2301 #endif
2302
2303 sig_act.sa_sigaction = int_handler;
2304 if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
2305 sig_act.sa_sigaction = fpe_handler;
2306 if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
2307 sig_act.sa_sigaction = abrt_handler;
2308 if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
2309 sig_act.sa_sigaction = quit_handler;
2310 if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
2311 sig_act.sa_sigaction = usr1_handler;
2312 if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
2313
2314 sig_act.sa_sigaction = segv_handler;
2315 if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
2316 if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
2317 #ifdef SIGBUS
2318 if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
2319 #endif
2320
2321 #ifdef SIGTRAP
2322 sig_act.sa_sigaction = trap_handler;
2323 if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
2324 #endif
2325
2326 #ifdef __HAVE_VM86
2327 sig_act.sa_sigaction = usr2_handler;
2328 if (sigaction( SIGUSR2, &sig_act, NULL ) == -1) goto error;
2329 #endif
2330
2331 wine_ldt_init_locking( ldt_lock, ldt_unlock );
2332 return;
2333
2334 error:
2335 perror("sigaction");
2336 exit(1);
2337 }
2338
2339
2340 #ifdef __HAVE_VM86
2341 /**********************************************************************
2342 * __wine_enter_vm86 (NTDLL.@)
2343 *
2344 * Enter vm86 mode with the specified register context.
2345 */
2346 void __wine_enter_vm86( CONTEXT *context )
2347 {
2348 EXCEPTION_RECORD rec;
2349 int res;
2350 struct vm86plus_struct vm86;
2351
2352 memset( &vm86, 0, sizeof(vm86) );
2353 for (;;)
2354 {
2355 restore_vm86_context( context, &vm86 );
2356
2357 ntdll_get_thread_data()->vm86_ptr = &vm86;
2358 merge_vm86_pending_flags( &rec );
2359
2360 res = vm86_enter( &ntdll_get_thread_data()->vm86_ptr ); /* uses and clears teb->vm86_ptr */
2361 if (res < 0)
2362 {
2363 errno = -res;
2364 return;
2365 }
2366
2367 save_vm86_context( context, &vm86 );
2368
2369 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
2370 rec.ExceptionRecord = NULL;
2371 rec.ExceptionAddress = (LPVOID)context->Eip;
2372 rec.NumberParameters = 0;
2373
2374 switch(VM86_TYPE(res))
2375 {
2376 case VM86_UNKNOWN: /* unhandled GP fault - IO-instruction or similar */
2377 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
2378 break;
2379 case VM86_TRAP: /* return due to DOS-debugger request */
2380 switch(VM86_ARG(res))
2381 {
2382 case TRAP_x86_TRCTRAP: /* Single-step exception */
2383 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
2384 break;
2385 case TRAP_x86_BPTFLT: /* Breakpoint exception */
2386 rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */
2387 /* fall through */
2388 default:
2389 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
2390 break;
2391 }
2392 break;
2393 case VM86_INTx: /* int3/int x instruction (ARG = x) */
2394 rec.ExceptionCode = EXCEPTION_VM86_INTx;
2395 rec.NumberParameters = 1;
2396 rec.ExceptionInformation[0] = VM86_ARG(res);
2397 break;
2398 case VM86_STI: /* sti/popf/iret instruction enabled virtual interrupts */
2399 context->EFlags |= VIF_FLAG;
2400 context->EFlags &= ~VIP_FLAG;
2401 get_vm86_teb_info()->vm86_pending = 0;
2402 rec.ExceptionCode = EXCEPTION_VM86_STI;
2403 break;
2404 case VM86_PICRETURN: /* return due to pending PIC request */
2405 rec.ExceptionCode = EXCEPTION_VM86_PICRETURN;
2406 break;
2407 case VM86_SIGNAL: /* cannot happen because vm86_enter handles this case */
2408 default:
2409 WINE_ERR( "unhandled result from vm86 mode %x\n", res );
2410 continue;
2411 }
2412 raise_exception( &rec, context, TRUE );
2413 }
2414 }
2415
2416 #else /* __HAVE_VM86 */
2417 /**********************************************************************
2418 * __wine_enter_vm86 (NTDLL.@)
2419 */
2420 void __wine_enter_vm86( CONTEXT *context )
2421 {
2422 MESSAGE("vm86 mode not supported on this platform\n");
2423 }
2424 #endif /* __HAVE_VM86 */
2425
2426
2427 /*******************************************************************
2428 * RtlUnwind (NTDLL.@)
2429 */
2430 void WINAPI __regs_RtlUnwind( EXCEPTION_REGISTRATION_RECORD* pEndFrame, PVOID targetIp,
2431 PEXCEPTION_RECORD pRecord, PVOID retval, CONTEXT *context )
2432 {
2433 EXCEPTION_RECORD record;
2434 EXCEPTION_REGISTRATION_RECORD *frame, *dispatch;
2435 DWORD res;
2436
2437 context->Eax = (DWORD)retval;
2438
2439 /* build an exception record, if we do not have one */
2440 if (!pRecord)
2441 {
2442 record.ExceptionCode = STATUS_UNWIND;
2443 record.ExceptionFlags = 0;
2444 record.ExceptionRecord = NULL;
2445 record.ExceptionAddress = (void *)context->Eip;
2446 record.NumberParameters = 0;
2447 pRecord = &record;
2448 }
2449
2450 pRecord->ExceptionFlags |= EH_UNWINDING | (pEndFrame ? 0 : EH_EXIT_UNWIND);
2451
2452 TRACE( "code=%x flags=%x\n", pRecord->ExceptionCode, pRecord->ExceptionFlags );
2453
2454 /* get chain of exception frames */
2455 frame = NtCurrentTeb()->Tib.ExceptionList;
2456 while ((frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL) && (frame != pEndFrame))
2457 {
2458 /* Check frame address */
2459 if (pEndFrame && (frame > pEndFrame))
2460 raise_status( STATUS_INVALID_UNWIND_TARGET, pRecord );
2461
2462 if (!is_valid_frame( frame )) raise_status( STATUS_BAD_STACK, pRecord );
2463
2464 /* Call handler */
2465 TRACE( "calling handler at %p code=%x flags=%x\n",
2466 frame->Handler, pRecord->ExceptionCode, pRecord->ExceptionFlags );
2467 res = EXC_CallHandler( pRecord, frame, context, &dispatch, frame->Handler, unwind_handler );
2468 TRACE( "handler at %p returned %x\n", frame->Handler, res );
2469
2470 switch(res)
2471 {
2472 case ExceptionContinueSearch:
2473 break;
2474 case ExceptionCollidedUnwind:
2475 frame = dispatch;
2476 break;
2477 default:
2478 raise_status( STATUS_INVALID_DISPOSITION, pRecord );
2479 break;
2480 }
2481 frame = __wine_pop_frame( frame );
2482 }
2483 }
2484 DEFINE_REGS_ENTRYPOINT( RtlUnwind, 4 )
2485
2486
2487 /*******************************************************************
2488 * NtRaiseException (NTDLL.@)
2489 */
2490 NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
2491 {
2492 NTSTATUS status = raise_exception( rec, context, first_chance );
2493 if (status == STATUS_SUCCESS)
2494 {
2495 set_debug_registers( context );
2496 set_cpu_context( context );
2497 }
2498 return status;
2499 }
2500
2501
2502 /***********************************************************************
2503 * RtlRaiseException (NTDLL.@)
2504 */
2505 void WINAPI __regs_RtlRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context )
2506 {
2507 NTSTATUS status;
2508
2509 rec->ExceptionAddress = (void *)context->Eip;
2510 status = raise_exception( rec, context, TRUE );
2511 if (status != STATUS_SUCCESS) raise_status( status, rec );
2512 }
2513 DEFINE_REGS_ENTRYPOINT( RtlRaiseException, 1 )
2514
2515
2516 /*************************************************************************
2517 * RtlCaptureStackBackTrace (NTDLL.@)
2518 */
2519 USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
2520 {
2521 CONTEXT context;
2522 ULONG i;
2523 ULONG *frame;
2524
2525 RtlCaptureContext( &context );
2526 if (hash) *hash = 0;
2527 frame = (ULONG *)context.Ebp;
2528
2529 while (skip--)
2530 {
2531 if (!is_valid_frame( frame )) return 0;
2532 frame = (ULONG *)*frame;
2533 }
2534
2535 for (i = 0; i < count; i++)
2536 {
2537 if (!is_valid_frame( frame )) break;
2538 buffer[i] = (void *)frame[1];
2539 if (hash) *hash += frame[1];
2540 frame = (ULONG *)*frame;
2541 }
2542 return i;
2543 }
2544
2545
2546 extern void DECLSPEC_NORETURN call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void *arg );
2547 __ASM_GLOBAL_FUNC( call_thread_entry_point,
2548 "pushl %ebp\n\t"
2549 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2550 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2551 "movl %esp,%ebp\n\t"
2552 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2553 "pushl %ebx\n\t"
2554 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2555 "pushl %esi\n\t"
2556 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
2557 "pushl %edi\n\t"
2558 __ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
2559 "pushl %ebp\n\t"
2560 "pushl 12(%ebp)\n\t"
2561 "pushl 8(%ebp)\n\t"
2562 "call " __ASM_NAME("call_thread_func") );
2563
2564 extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), void *frame );
2565 __ASM_GLOBAL_FUNC( call_thread_exit_func,
2566 "movl 4(%esp),%eax\n\t"
2567 "movl 8(%esp),%ecx\n\t"
2568 "movl 12(%esp),%ebp\n\t"
2569 __ASM_CFI(".cfi_def_cfa %ebp,4\n\t")
2570 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2571 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2572 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
2573 __ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
2574 "leal -20(%ebp),%esp\n\t"
2575 "pushl %eax\n\t"
2576 "call *%ecx" );
2577
2578 /* wrapper for apps that don't declare the thread function correctly */
2579 extern void DECLSPEC_NORETURN call_thread_func_wrapper( LPTHREAD_START_ROUTINE entry, void *arg );
2580 __ASM_GLOBAL_FUNC(call_thread_func_wrapper,
2581 "pushl %ebp\n\t"
2582 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2583 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2584 "movl %esp,%ebp\n\t"
2585 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2586 "subl $4,%esp\n\t"
2587 "pushl 12(%ebp)\n\t"
2588 "call *8(%ebp)\n\t"
2589 "leal -4(%ebp),%esp\n\t"
2590 "pushl %eax\n\t"
2591 "call " __ASM_NAME("exit_thread") "\n\t"
2592 "int $3" )
2593
2594 /***********************************************************************
2595 * call_thread_func
2596 */
2597 void call_thread_func( LPTHREAD_START_ROUTINE entry, void *arg, void *frame )
2598 {
2599 ntdll_get_thread_data()->exit_frame = frame;
2600 __TRY
2601 {
2602 call_thread_func_wrapper( entry, arg );
2603 }
2604 __EXCEPT(unhandled_exception_filter)
2605 {
2606 NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
2607 }
2608 __ENDTRY
2609 abort(); /* should not be reached */
2610 }
2611
2612 /***********************************************************************
2613 * RtlExitUserThread (NTDLL.@)
2614 */
2615 void WINAPI RtlExitUserThread( ULONG status )
2616 {
2617 if (!ntdll_get_thread_data()->exit_frame) exit_thread( status );
2618 call_thread_exit_func( status, exit_thread, ntdll_get_thread_data()->exit_frame );
2619 }
2620
2621 /***********************************************************************
2622 * abort_thread
2623 */
2624 void abort_thread( int status )
2625 {
2626 if (!ntdll_get_thread_data()->exit_frame) terminate_thread( status );
2627 call_thread_exit_func( status, terminate_thread, ntdll_get_thread_data()->exit_frame );
2628 }
2629
2630 /**********************************************************************
2631 * DbgBreakPoint (NTDLL.@)
2632 */
2633 __ASM_STDCALL_FUNC( DbgBreakPoint, 0, "int $3; ret")
2634
2635 /**********************************************************************
2636 * DbgUserBreakPoint (NTDLL.@)
2637 */
2638 __ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "int $3; ret")
2639
2640 /**********************************************************************
2641 * NtCurrentTeb (NTDLL.@)
2642 */
2643 __ASM_STDCALL_FUNC( NtCurrentTeb, 0, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" )
2644
2645
2646 /**************************************************************************
2647 * _chkstk (NTDLL.@)
2648 */
2649 __ASM_STDCALL_FUNC( _chkstk, 0,
2650 "negl %eax\n\t"
2651 "addl %esp,%eax\n\t"
2652 "xchgl %esp,%eax\n\t"
2653 "movl 0(%eax),%eax\n\t" /* copy return address from old location */
2654 "movl %eax,0(%esp)\n\t"
2655 "ret" )
2656
2657 /**************************************************************************
2658 * _alloca_probe (NTDLL.@)
2659 */
2660 __ASM_STDCALL_FUNC( _alloca_probe, 0,
2661 "negl %eax\n\t"
2662 "addl %esp,%eax\n\t"
2663 "xchgl %esp,%eax\n\t"
2664 "movl 0(%eax),%eax\n\t" /* copy return address from old location */
2665 "movl %eax,0(%esp)\n\t"
2666 "ret" )
2667
2668
2669 /**********************************************************************
2670 * EXC_CallHandler (internal)
2671 *
2672 * Some exception handlers depend on EBP to have a fixed position relative to
2673 * the exception frame.
2674 * Shrinker depends on (*1) doing what it does,
2675 * (*2) being the exact instruction it is and (*3) beginning with 0x64
2676 * (i.e. the %fs prefix to the movl instruction). It also depends on the
2677 * function calling the handler having only 5 parameters (*4).
2678 */
2679 __ASM_GLOBAL_FUNC( EXC_CallHandler,
2680 "pushl %ebp\n\t"
2681 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2682 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2683 "movl %esp,%ebp\n\t"
2684 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2685 "pushl %ebx\n\t"
2686 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2687 "movl 28(%ebp), %edx\n\t" /* ugly hack to pass the 6th param needed because of Shrinker */
2688 "pushl 24(%ebp)\n\t"
2689 "pushl 20(%ebp)\n\t"
2690 "pushl 16(%ebp)\n\t"
2691 "pushl 12(%ebp)\n\t"
2692 "pushl 8(%ebp)\n\t"
2693 "call " __ASM_NAME("call_exception_handler") "\n\t"
2694 "popl %ebx\n\t"
2695 __ASM_CFI(".cfi_same_value %ebx\n\t")
2696 "leave\n"
2697 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2698 __ASM_CFI(".cfi_same_value %ebp\n\t")
2699 "ret" )
2700 __ASM_GLOBAL_FUNC(call_exception_handler,
2701 "pushl %ebp\n\t"
2702 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2703 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2704 "movl %esp,%ebp\n\t"
2705 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2706 "subl $12,%esp\n\t"
2707 "pushl 12(%ebp)\n\t" /* make any exceptions in this... */
2708 "pushl %edx\n\t" /* handler be handled by... */
2709 ".byte 0x64\n\t"
2710 "pushl (0)\n\t" /* nested_handler (passed in edx). */
2711 ".byte 0x64\n\t"
2712 "movl %esp,(0)\n\t" /* push the new exception frame onto the exception stack. */
2713 "pushl 20(%ebp)\n\t"
2714 "pushl 16(%ebp)\n\t"
2715 "pushl 12(%ebp)\n\t"
2716 "pushl 8(%ebp)\n\t"
2717 "movl 24(%ebp), %ecx\n\t" /* (*1) */
2718 "call *%ecx\n\t" /* call handler. (*2) */
2719 ".byte 0x64\n\t"
2720 "movl (0), %esp\n\t" /* restore previous... (*3) */
2721 ".byte 0x64\n\t"
2722 "popl (0)\n\t" /* exception frame. */
2723 "movl %ebp, %esp\n\t" /* restore saved stack, in case it was corrupted */
2724 "popl %ebp\n\t"
2725 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2726 __ASM_CFI(".cfi_same_value %ebp\n\t")
2727 "ret $20" ) /* (*4) */
2728
2729 #endif /* __i386__ */
Windows API implementation