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comctl32: Fix a typo in comment.
[wine.git] / dlls / ntdll / signal_i386.c
blobdcca0f59a39fb7455245a27fe3b4ee9e8ce08f22
1 /*
2 * i386 signal handling routines
3 *
4 * Copyright 1999 Alexandre Julliard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #ifdef __i386__
22
23 #include "config.h"
24 #include "wine/port.h"
25
26 #include <errno.h>
27 #include <signal.h>
28 #include <stdlib.h>
29 #include <stdarg.h>
30 #include <stdio.h>
31 #include <sys/types.h>
32 #ifdef HAVE_UNISTD_H
33 # include <unistd.h>
34 #endif
35 #ifdef HAVE_SYS_PARAM_H
36 # include <sys/param.h>
37 #endif
38 #ifdef HAVE_SYSCALL_H
39 # include <syscall.h>
40 #else
41 # ifdef HAVE_SYS_SYSCALL_H
42 # include <sys/syscall.h>
43 # endif
44 #endif
45 #ifdef HAVE_SYS_VM86_H
46 # include <sys/vm86.h>
47 #endif
48 #ifdef HAVE_SYS_SIGNAL_H
49 # include <sys/signal.h>
50 #endif
51 #ifdef HAVE_SYS_SYSCTL_H
52 # include <sys/sysctl.h>
53 #endif
54 #ifdef HAVE_SYS_UCONTEXT_H
55 # include <sys/ucontext.h>
56 #endif
57
58 #include "ntstatus.h"
59 #define WIN32_NO_STATUS
60 #include "windef.h"
61 #include "wine/library.h"
62 #include "ntdll_misc.h"
63 #include "wine/exception.h"
64 #include "wine/debug.h"
65
66 #ifdef HAVE_VALGRIND_MEMCHECK_H
67 #include <valgrind/memcheck.h>
68 #endif
69
70 #undef ERR /* Solaris needs to define this */
71
72 WINE_DEFAULT_DEBUG_CHANNEL(seh);
73 WINE_DECLARE_DEBUG_CHANNEL(relay);
74
75 /* not defined for x86, so copy the x86_64 definition */
76 typedef struct DECLSPEC_ALIGN(16) _M128A
77 {
78 ULONGLONG Low;
79 LONGLONG High;
80 } M128A;
81
82 typedef struct
83 {
84 WORD ControlWord;
85 WORD StatusWord;
86 BYTE TagWord;
87 BYTE Reserved1;
88 WORD ErrorOpcode;
89 DWORD ErrorOffset;
90 WORD ErrorSelector;
91 WORD Reserved2;
92 DWORD DataOffset;
93 WORD DataSelector;
94 WORD Reserved3;
95 DWORD MxCsr;
96 DWORD MxCsr_Mask;
97 M128A FloatRegisters[8];
98 M128A XmmRegisters[16];
99 BYTE Reserved4[96];
100 } XMM_SAVE_AREA32;
101
102 /***********************************************************************
103 * signal context platform-specific definitions
104 */
105
106 #ifdef __linux__
107
108 #ifndef HAVE_SYS_UCONTEXT_H
109
110 enum
111 {
112 REG_GS, REG_FS, REG_ES, REG_DS, REG_EDI, REG_ESI, REG_EBP, REG_ESP,
113 REG_EBX, REG_EDX, REG_ECX, REG_EAX, REG_TRAPNO, REG_ERR, REG_EIP,
114 REG_CS, REG_EFL, REG_UESP, REG_SS, NGREG
115 };
116
117 typedef int greg_t;
118 typedef greg_t gregset_t[NGREG];
119
120 struct _libc_fpreg
121 {
122 unsigned short significand[4];
123 unsigned short exponent;
124 };
125
126 struct _libc_fpstate
127 {
128 unsigned long cw;
129 unsigned long sw;
130 unsigned long tag;
131 unsigned long ipoff;
132 unsigned long cssel;
133 unsigned long dataoff;
134 unsigned long datasel;
135 struct _libc_fpreg _st[8];
136 unsigned long status;
137 };
138
139 typedef struct _libc_fpstate* fpregset_t;
140
141 typedef struct
142 {
143 gregset_t gregs;
144 fpregset_t fpregs;
145 unsigned long oldmask;
146 unsigned long cr2;
147 } mcontext_t;
148
149 typedef struct ucontext
150 {
151 unsigned long uc_flags;
152 struct ucontext *uc_link;
153 stack_t uc_stack;
154 mcontext_t uc_mcontext;
155 sigset_t uc_sigmask;
156 } ucontext_t;
157 #endif /* HAVE_SYS_UCONTEXT_H */
158
159 #define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX])
160 #define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX])
161 #define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX])
162 #define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX])
163 #define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI])
164 #define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI])
165 #define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP])
166 #define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP])
167
168 #define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS])
169 #define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS])
170 #define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES])
171 #define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS])
172 #define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS])
173 #define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS])
174
175 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
176 #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
177 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
178 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
179
180 #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->uc_mcontext.fpregs))
181 #define FPUX_sig(context) (FPU_sig(context) && !((context)->uc_mcontext.fpregs->status >> 16) ? (XMM_SAVE_AREA32 *)(FPU_sig(context) + 1) : NULL)
182
183 #define VIF_FLAG 0x00080000
184 #define VIP_FLAG 0x00100000
185
186 int vm86_enter( void **vm86_ptr );
187 void vm86_return(void);
188 void vm86_return_end(void);
189 __ASM_GLOBAL_FUNC(vm86_enter,
190 "pushl %ebp\n\t"
191 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
192 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
193 "movl %esp,%ebp\n\t"
194 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
195 "pushl %ebx\n\t"
196 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
197 "movl $166,%eax\n\t" /*SYS_vm86*/
198 "movl 8(%ebp),%ecx\n\t" /* vm86_ptr */
199 "movl (%ecx),%ecx\n\t"
200 "movl $1,%ebx\n\t" /*VM86_ENTER*/
201 "pushl %ecx\n\t" /* put vm86plus_struct ptr somewhere we can find it */
202 "pushl %fs\n\t"
203 "pushl %gs\n\t"
204 "int $0x80\n"
205 ".globl " __ASM_NAME("vm86_return") "\n\t"
206 __ASM_FUNC("vm86_return") "\n"
207 __ASM_NAME("vm86_return") ":\n\t"
208 "popl %gs\n\t"
209 "popl %fs\n\t"
210 "popl %ecx\n\t"
211 "popl %ebx\n\t"
212 __ASM_CFI(".cfi_same_value %ebx\n\t")
213 "popl %ebp\n\t"
214 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
215 __ASM_CFI(".cfi_same_value %ebp\n\t")
216 "testl %eax,%eax\n\t"
217 "jl 0f\n\t"
218 "cmpb $0,%al\n\t" /* VM86_SIGNAL */
219 "je " __ASM_NAME("vm86_enter") "\n\t"
220 "0:\n\t"
221 "movl 4(%esp),%ecx\n\t" /* vm86_ptr */
222 "movl $0,(%ecx)\n\t"
223 ".globl " __ASM_NAME("vm86_return_end") "\n\t"
224 __ASM_FUNC("vm86_return_end") "\n"
225 __ASM_NAME("vm86_return_end") ":\n\t"
226 "ret" )
227
228 #ifdef HAVE_SYS_VM86_H
229 # define __HAVE_VM86
230 #endif
231
232 #ifdef __ANDROID__
233 /* custom signal restorer since we may have unmapped the one in vdso, and bionic doesn't check for that */
234 void rt_sigreturn(void);
235 __ASM_GLOBAL_FUNC( rt_sigreturn,
236 "movl $173,%eax\n\t" /* NR_rt_sigreturn */
237 "int $0x80" );
238 #endif
239
240 #elif defined (__BSDI__)
241
242 #include <machine/frame.h>
243 typedef struct trapframe ucontext_t;
244
245 #define EAX_sig(context) ((context)->tf_eax)
246 #define EBX_sig(context) ((context)->tf_ebx)
247 #define ECX_sig(context) ((context)->tf_ecx)
248 #define EDX_sig(context) ((context)->tf_edx)
249 #define ESI_sig(context) ((context)->tf_esi)
250 #define EDI_sig(context) ((context)->tf_edi)
251 #define EBP_sig(context) ((context)->tf_ebp)
252
253 #define CS_sig(context) ((context)->tf_cs)
254 #define DS_sig(context) ((context)->tf_ds)
255 #define ES_sig(context) ((context)->tf_es)
256 #define SS_sig(context) ((context)->tf_ss)
257
258 #define EFL_sig(context) ((context)->tf_eflags)
259
260 #define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
261 #define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
262
263 #define FPU_sig(context) NULL /* FIXME */
264 #define FPUX_sig(context) NULL /* FIXME */
265
266 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
267
268 #include <machine/trap.h>
269
270 #define EAX_sig(context) ((context)->uc_mcontext.mc_eax)
271 #define EBX_sig(context) ((context)->uc_mcontext.mc_ebx)
272 #define ECX_sig(context) ((context)->uc_mcontext.mc_ecx)
273 #define EDX_sig(context) ((context)->uc_mcontext.mc_edx)
274 #define ESI_sig(context) ((context)->uc_mcontext.mc_esi)
275 #define EDI_sig(context) ((context)->uc_mcontext.mc_edi)
276 #define EBP_sig(context) ((context)->uc_mcontext.mc_ebp)
277
278 #define CS_sig(context) ((context)->uc_mcontext.mc_cs)
279 #define DS_sig(context) ((context)->uc_mcontext.mc_ds)
280 #define ES_sig(context) ((context)->uc_mcontext.mc_es)
281 #define FS_sig(context) ((context)->uc_mcontext.mc_fs)
282 #define GS_sig(context) ((context)->uc_mcontext.mc_gs)
283 #define SS_sig(context) ((context)->uc_mcontext.mc_ss)
284
285 #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
286 #define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
287 #define EFL_sig(context) ((context)->uc_mcontext.mc_eflags)
288
289 #define EIP_sig(context) ((context)->uc_mcontext.mc_eip)
290 #define ESP_sig(context) ((context)->uc_mcontext.mc_esp)
291
292 #define FPU_sig(context) NULL /* FIXME */
293 #define FPUX_sig(context) NULL /* FIXME */
294
295 #elif defined (__OpenBSD__)
296
297 #define EAX_sig(context) ((context)->sc_eax)
298 #define EBX_sig(context) ((context)->sc_ebx)
299 #define ECX_sig(context) ((context)->sc_ecx)
300 #define EDX_sig(context) ((context)->sc_edx)
301 #define ESI_sig(context) ((context)->sc_esi)
302 #define EDI_sig(context) ((context)->sc_edi)
303 #define EBP_sig(context) ((context)->sc_ebp)
304
305 #define CS_sig(context) ((context)->sc_cs)
306 #define DS_sig(context) ((context)->sc_ds)
307 #define ES_sig(context) ((context)->sc_es)
308 #define FS_sig(context) ((context)->sc_fs)
309 #define GS_sig(context) ((context)->sc_gs)
310 #define SS_sig(context) ((context)->sc_ss)
311
312 #define TRAP_sig(context) ((context)->sc_trapno)
313 #define ERROR_sig(context) ((context)->sc_err)
314 #define EFL_sig(context) ((context)->sc_eflags)
315
316 #define EIP_sig(context) ((context)->sc_eip)
317 #define ESP_sig(context) ((context)->sc_esp)
318
319 #define FPU_sig(context) NULL /* FIXME */
320 #define FPUX_sig(context) NULL /* FIXME */
321
322 #define T_MCHK T_MACHK
323 #define T_XMMFLT T_XFTRAP
324
325 #elif defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
326
327 #ifdef _SCO_DS
328 #include <sys/regset.h>
329 #define gregs regs
330 #endif
331
332 #define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
333 #define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
334 #define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
335 #define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
336 #define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
337 #define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
338 #define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
339
340 #define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
341 #define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
342 #define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
343 #define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
344
345 #define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
346 #define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
347
348 #define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
349
350 #define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
351 #ifdef UESP
352 #define ESP_sig(context) ((context)->uc_mcontext.gregs[UESP])
353 #elif defined(R_ESP)
354 #define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
355 #else
356 #define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
357 #endif
358 #ifdef ERR
359 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[ERR])
360 #endif
361 #ifdef TRAPNO
362 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
363 #endif
364
365 #define FPU_sig(context) NULL /* FIXME */
366 #define FPUX_sig(context) NULL /* FIXME */
367
368 #elif defined (__APPLE__)
369
370 /* work around silly renaming of struct members in OS X 10.5 */
371 #if __DARWIN_UNIX03 && defined(_STRUCT_X86_EXCEPTION_STATE32)
372 #define EAX_sig(context) ((context)->uc_mcontext->__ss.__eax)
373 #define EBX_sig(context) ((context)->uc_mcontext->__ss.__ebx)
374 #define ECX_sig(context) ((context)->uc_mcontext->__ss.__ecx)
375 #define EDX_sig(context) ((context)->uc_mcontext->__ss.__edx)
376 #define ESI_sig(context) ((context)->uc_mcontext->__ss.__esi)
377 #define EDI_sig(context) ((context)->uc_mcontext->__ss.__edi)
378 #define EBP_sig(context) ((context)->uc_mcontext->__ss.__ebp)
379 #define CS_sig(context) ((context)->uc_mcontext->__ss.__cs)
380 #define DS_sig(context) ((context)->uc_mcontext->__ss.__ds)
381 #define ES_sig(context) ((context)->uc_mcontext->__ss.__es)
382 #define FS_sig(context) ((context)->uc_mcontext->__ss.__fs)
383 #define GS_sig(context) ((context)->uc_mcontext->__ss.__gs)
384 #define SS_sig(context) ((context)->uc_mcontext->__ss.__ss)
385 #define EFL_sig(context) ((context)->uc_mcontext->__ss.__eflags)
386 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__eip))
387 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__esp))
388 #define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno)
389 #define ERROR_sig(context) ((context)->uc_mcontext->__es.__err)
390 #define FPU_sig(context) NULL
391 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->__fs.__fpu_fcw)
392 #else
393 #define EAX_sig(context) ((context)->uc_mcontext->ss.eax)
394 #define EBX_sig(context) ((context)->uc_mcontext->ss.ebx)
395 #define ECX_sig(context) ((context)->uc_mcontext->ss.ecx)
396 #define EDX_sig(context) ((context)->uc_mcontext->ss.edx)
397 #define ESI_sig(context) ((context)->uc_mcontext->ss.esi)
398 #define EDI_sig(context) ((context)->uc_mcontext->ss.edi)
399 #define EBP_sig(context) ((context)->uc_mcontext->ss.ebp)
400 #define CS_sig(context) ((context)->uc_mcontext->ss.cs)
401 #define DS_sig(context) ((context)->uc_mcontext->ss.ds)
402 #define ES_sig(context) ((context)->uc_mcontext->ss.es)
403 #define FS_sig(context) ((context)->uc_mcontext->ss.fs)
404 #define GS_sig(context) ((context)->uc_mcontext->ss.gs)
405 #define SS_sig(context) ((context)->uc_mcontext->ss.ss)
406 #define EFL_sig(context) ((context)->uc_mcontext->ss.eflags)
407 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip))
408 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.esp))
409 #define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
410 #define ERROR_sig(context) ((context)->uc_mcontext->es.err)
411 #define FPU_sig(context) NULL
412 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->fs.fpu_fcw)
413 #endif
414
415 #elif defined(__NetBSD__)
416
417 #define EAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EAX])
418 #define EBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBX])
419 #define ECX_sig(context) ((context)->uc_mcontext.__gregs[_REG_ECX])
420 #define EDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDX])
421 #define ESI_sig(context) ((context)->uc_mcontext.__gregs[_REG_ESI])
422 #define EDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDI])
423 #define EBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBP])
424 #define ESP_sig(context) _UC_MACHINE_SP(context)
425
426 #define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
427 #define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
428 #define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
429 #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
430 #define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
431 #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
432
433 #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_EFL])
434 #define EIP_sig(context) _UC_MACHINE_PC(context)
435 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
436 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
437
438 #define FPU_sig(context) NULL
439 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&((context)->uc_mcontext.__fpregs))
440
441 #define T_MCHK T_MCA
442 #define T_XMMFLT T_XMM
443
444 #elif defined(__GNU__)
445
446 #define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX])
447 #define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX])
448 #define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX])
449 #define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX])
450 #define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI])
451 #define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI])
452 #define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP])
453 #define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP])
454
455 #define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS])
456 #define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS])
457 #define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES])
458 #define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS])
459 #define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS])
460 #define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS])
461
462 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
463 #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
464 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
465 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
466
467 #define FPU_sig(context) ((FLOATING_SAVE_AREA *)&(context)->uc_mcontext.fpregs.fp_reg_set.fpchip_state)
468 #define FPUX_sig(context) NULL
469
470 #else
471 #error You must define the signal context functions for your platform
472 #endif /* linux */
473
474 typedef int (*wine_signal_handler)(unsigned int sig);
475
476 static const size_t teb_size = 4096; /* we reserve one page for the TEB */
477 static size_t signal_stack_mask;
478 static size_t signal_stack_size;
479
480 static wine_signal_handler handlers[256];
481
482 static BOOL fpux_support; /* whether the CPU supports extended fpu context */
483
484 enum i386_trap_code
485 {
486 TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
487 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
488 TRAP_x86_DIVIDE = T_DIVIDE, /* Division by zero exception */
489 TRAP_x86_TRCTRAP = T_TRCTRAP, /* Single-step exception */
490 TRAP_x86_NMI = T_NMI, /* NMI interrupt */
491 TRAP_x86_BPTFLT = T_BPTFLT, /* Breakpoint exception */
492 TRAP_x86_OFLOW = T_OFLOW, /* Overflow exception */
493 TRAP_x86_BOUND = T_BOUND, /* Bound range exception */
494 TRAP_x86_PRIVINFLT = T_PRIVINFLT, /* Invalid opcode exception */
495 TRAP_x86_DNA = T_DNA, /* Device not available exception */
496 TRAP_x86_DOUBLEFLT = T_DOUBLEFLT, /* Double fault exception */
497 TRAP_x86_FPOPFLT = T_FPOPFLT, /* Coprocessor segment overrun */
498 TRAP_x86_TSSFLT = T_TSSFLT, /* Invalid TSS exception */
499 TRAP_x86_SEGNPFLT = T_SEGNPFLT, /* Segment not present exception */
500 TRAP_x86_STKFLT = T_STKFLT, /* Stack fault */
501 TRAP_x86_PROTFLT = T_PROTFLT, /* General protection fault */
502 TRAP_x86_PAGEFLT = T_PAGEFLT, /* Page fault */
503 TRAP_x86_ARITHTRAP = T_ARITHTRAP, /* Floating point exception */
504 TRAP_x86_ALIGNFLT = T_ALIGNFLT, /* Alignment check exception */
505 TRAP_x86_MCHK = T_MCHK, /* Machine check exception */
506 TRAP_x86_CACHEFLT = T_XMMFLT /* Cache flush exception */
507 #else
508 TRAP_x86_DIVIDE = 0, /* Division by zero exception */
509 TRAP_x86_TRCTRAP = 1, /* Single-step exception */
510 TRAP_x86_NMI = 2, /* NMI interrupt */
511 TRAP_x86_BPTFLT = 3, /* Breakpoint exception */
512 TRAP_x86_OFLOW = 4, /* Overflow exception */
513 TRAP_x86_BOUND = 5, /* Bound range exception */
514 TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */
515 TRAP_x86_DNA = 7, /* Device not available exception */
516 TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */
517 TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */
518 TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */
519 TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */
520 TRAP_x86_STKFLT = 12, /* Stack fault */
521 TRAP_x86_PROTFLT = 13, /* General protection fault */
522 TRAP_x86_PAGEFLT = 14, /* Page fault */
523 TRAP_x86_ARITHTRAP = 16, /* Floating point exception */
524 TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */
525 TRAP_x86_MCHK = 18, /* Machine check exception */
526 TRAP_x86_CACHEFLT = 19 /* SIMD exception (via SIGFPE) if CPU is SSE capable
527 otherwise Cache flush exception (via SIGSEV) */
528 #endif
529 };
530
531 struct x86_thread_data
532 {
533 DWORD fs; /* 1d4 TEB selector */
534 DWORD gs; /* 1d8 libc selector; update winebuild if you move this! */
535 DWORD dr0; /* 1dc debug registers */
536 DWORD dr1; /* 1e0 */
537 DWORD dr2; /* 1e4 */
538 DWORD dr3; /* 1e8 */
539 DWORD dr6; /* 1ec */
540 DWORD dr7; /* 1f0 */
541 void *exit_frame; /* 1f4 exit frame pointer */
542 #ifdef __HAVE_VM86
543 void *vm86_ptr; /* 1f8 data for vm86 mode */
544 WINE_VM86_TEB_INFO vm86; /* 1fc vm86 private data */
545 #endif
546 /* the ntdll_thread_data structure follows here */
547 };
548
549 C_ASSERT( offsetof( TEB, SystemReserved2 ) + offsetof( struct x86_thread_data, gs ) == 0x1d8 );
550 C_ASSERT( offsetof( TEB, SystemReserved2 ) + offsetof( struct x86_thread_data, exit_frame ) == 0x1f4 );
551 #ifdef __HAVE_VM86
552 C_ASSERT( offsetof( TEB, SystemReserved2 ) + offsetof( struct x86_thread_data, vm86 ) ==
553 offsetof( TEB, GdiTebBatch ) + offsetof( struct ntdll_thread_data, __vm86 ));
554 #endif
555
556 static inline struct x86_thread_data *x86_thread_data(void)
557 {
558 return (struct x86_thread_data *)NtCurrentTeb()->SystemReserved2;
559 }
560
561 /* Exception record for handling exceptions happening inside exception handlers */
562 typedef struct
563 {
564 EXCEPTION_REGISTRATION_RECORD frame;
565 EXCEPTION_REGISTRATION_RECORD *prevFrame;
566 } EXC_NESTED_FRAME;
567
568 extern DWORD EXC_CallHandler( EXCEPTION_RECORD *record, EXCEPTION_REGISTRATION_RECORD *frame,
569 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher,
570 PEXCEPTION_HANDLER handler, PEXCEPTION_HANDLER nested_handler );
571
572 /***********************************************************************
573 * dispatch_signal
574 */
575 static inline int dispatch_signal(unsigned int sig)
576 {
577 if (handlers[sig] == NULL) return 0;
578 return handlers[sig](sig);
579 }
580
581
582 /***********************************************************************
583 * get_trap_code
584 *
585 * Get the trap code for a signal.
586 */
587 static inline enum i386_trap_code get_trap_code( const ucontext_t *sigcontext )
588 {
589 #ifdef TRAP_sig
590 return TRAP_sig(sigcontext);
591 #else
592 return TRAP_x86_UNKNOWN; /* unknown trap code */
593 #endif
594 }
595
596 /***********************************************************************
597 * get_error_code
598 *
599 * Get the error code for a signal.
600 */
601 static inline WORD get_error_code( const ucontext_t *sigcontext )
602 {
603 #ifdef ERROR_sig
604 return ERROR_sig(sigcontext);
605 #else
606 return 0;
607 #endif
608 }
609
610 /***********************************************************************
611 * get_signal_stack
612 *
613 * Get the base of the signal stack for the current thread.
614 */
615 static inline void *get_signal_stack(void)
616 {
617 return (char *)NtCurrentTeb() + 4096;
618 }
619
620
621 /***********************************************************************
622 * get_current_teb
623 *
624 * Get the current teb based on the stack pointer.
625 */
626 static inline TEB *get_current_teb(void)
627 {
628 unsigned long esp;
629 __asm__("movl %%esp,%0" : "=g" (esp) );
630 return (TEB *)(esp & ~signal_stack_mask);
631 }
632
633
634 /*******************************************************************
635 * is_valid_frame
636 */
637 static inline BOOL is_valid_frame( void *frame )
638 {
639 if ((ULONG_PTR)frame & 3) return FALSE;
640 return (frame >= NtCurrentTeb()->Tib.StackLimit &&
641 (void **)frame < (void **)NtCurrentTeb()->Tib.StackBase - 1);
642 }
643
644 /*******************************************************************
645 * raise_handler
646 *
647 * Handler for exceptions happening inside a handler.
648 */
649 static DWORD raise_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
650 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
651 {
652 if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
653 return ExceptionContinueSearch;
654 /* We shouldn't get here so we store faulty frame in dispatcher */
655 *dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame;
656 return ExceptionNestedException;
657 }
658
659
660 /*******************************************************************
661 * unwind_handler
662 *
663 * Handler for exceptions happening inside an unwind handler.
664 */
665 static DWORD unwind_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
666 CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
667 {
668 if (!(rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)))
669 return ExceptionContinueSearch;
670 /* We shouldn't get here so we store faulty frame in dispatcher */
671 *dispatcher = ((EXC_NESTED_FRAME*)frame)->prevFrame;
672 return ExceptionCollidedUnwind;
673 }
674
675
676 /**********************************************************************
677 * call_stack_handlers
678 *
679 * Call the stack handlers chain.
680 */
681 static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *context )
682 {
683 EXCEPTION_REGISTRATION_RECORD *frame, *dispatch, *nested_frame;
684 DWORD res;
685
686 frame = NtCurrentTeb()->Tib.ExceptionList;
687 nested_frame = NULL;
688 while (frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL)
689 {
690 /* Check frame address */
691 if (!is_valid_frame( frame ))
692 {
693 rec->ExceptionFlags |= EH_STACK_INVALID;
694 break;
695 }
696
697 /* Call handler */
698 TRACE( "calling handler at %p code=%x flags=%x\n",
699 frame->Handler, rec->ExceptionCode, rec->ExceptionFlags );
700 res = EXC_CallHandler( rec, frame, context, &dispatch, frame->Handler, raise_handler );
701 TRACE( "handler at %p returned %x\n", frame->Handler, res );
702
703 if (frame == nested_frame)
704 {
705 /* no longer nested */
706 nested_frame = NULL;
707 rec->ExceptionFlags &= ~EH_NESTED_CALL;
708 }
709
710 switch(res)
711 {
712 case ExceptionContinueExecution:
713 if (!(rec->ExceptionFlags & EH_NONCONTINUABLE)) return STATUS_SUCCESS;
714 return STATUS_NONCONTINUABLE_EXCEPTION;
715 case ExceptionContinueSearch:
716 break;
717 case ExceptionNestedException:
718 if (nested_frame < dispatch) nested_frame = dispatch;
719 rec->ExceptionFlags |= EH_NESTED_CALL;
720 break;
721 default:
722 return STATUS_INVALID_DISPOSITION;
723 }
724 frame = frame->Prev;
725 }
726 return STATUS_UNHANDLED_EXCEPTION;
727 }
728
729
730 /*******************************************************************
731 * raise_exception
732 *
733 * Implementation of NtRaiseException.
734 */
735 static NTSTATUS raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
736 {
737 NTSTATUS status;
738
739 if (first_chance)
740 {
741 DWORD c;
742
743 TRACE( "code=%x flags=%x addr=%p ip=%08x tid=%04x\n",
744 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
745 context->Eip, GetCurrentThreadId() );
746 for (c = 0; c < rec->NumberParameters; c++)
747 TRACE( " info[%d]=%08lx\n", c, rec->ExceptionInformation[c] );
748 if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
749 {
750 if (rec->ExceptionInformation[1] >> 16)
751 MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
752 rec->ExceptionAddress,
753 (char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
754 else
755 MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
756 rec->ExceptionAddress,
757 (char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
758 }
759 else
760 {
761 TRACE(" eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n",
762 context->Eax, context->Ebx, context->Ecx,
763 context->Edx, context->Esi, context->Edi );
764 TRACE(" ebp=%08x esp=%08x cs=%04x ds=%04x es=%04x fs=%04x gs=%04x flags=%08x\n",
765 context->Ebp, context->Esp, context->SegCs, context->SegDs,
766 context->SegEs, context->SegFs, context->SegGs, context->EFlags );
767 }
768 status = send_debug_event( rec, TRUE, context );
769 if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
770 return STATUS_SUCCESS;
771
772 /* fix up instruction pointer in context for EXCEPTION_BREAKPOINT */
773 if (rec->ExceptionCode == EXCEPTION_BREAKPOINT) context->Eip--;
774
775 if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION)
776 return STATUS_SUCCESS;
777
778 if ((status = call_stack_handlers( rec, context )) != STATUS_UNHANDLED_EXCEPTION)
779 return status;
780 }
781
782 /* last chance exception */
783
784 status = send_debug_event( rec, FALSE, context );
785 if (status != DBG_CONTINUE)
786 {
787 if (rec->ExceptionFlags & EH_STACK_INVALID)
788 WINE_ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
789 else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
790 WINE_ERR("Process attempted to continue execution after noncontinuable exception.\n");
791 else
792 WINE_ERR("Unhandled exception code %x flags %x addr %p\n",
793 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
794 NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode );
795 }
796 return STATUS_SUCCESS;
797 }
798
799
800 #ifdef __HAVE_VM86
801 /***********************************************************************
802 * save_vm86_context
803 *
804 * Set the register values from a vm86 structure.
805 */
806 static void save_vm86_context( CONTEXT *context, const struct vm86plus_struct *vm86 )
807 {
808 context->ContextFlags = CONTEXT_FULL;
809 context->Eax = vm86->regs.eax;
810 context->Ebx = vm86->regs.ebx;
811 context->Ecx = vm86->regs.ecx;
812 context->Edx = vm86->regs.edx;
813 context->Esi = vm86->regs.esi;
814 context->Edi = vm86->regs.edi;
815 context->Esp = vm86->regs.esp;
816 context->Ebp = vm86->regs.ebp;
817 context->Eip = vm86->regs.eip;
818 context->SegCs = vm86->regs.cs;
819 context->SegDs = vm86->regs.ds;
820 context->SegEs = vm86->regs.es;
821 context->SegFs = vm86->regs.fs;
822 context->SegGs = vm86->regs.gs;
823 context->SegSs = vm86->regs.ss;
824 context->EFlags = vm86->regs.eflags;
825 }
826
827
828 /***********************************************************************
829 * restore_vm86_context
830 *
831 * Build a vm86 structure from the register values.
832 */
833 static void restore_vm86_context( const CONTEXT *context, struct vm86plus_struct *vm86 )
834 {
835 vm86->regs.eax = context->Eax;
836 vm86->regs.ebx = context->Ebx;
837 vm86->regs.ecx = context->Ecx;
838 vm86->regs.edx = context->Edx;
839 vm86->regs.esi = context->Esi;
840 vm86->regs.edi = context->Edi;
841 vm86->regs.esp = context->Esp;
842 vm86->regs.ebp = context->Ebp;
843 vm86->regs.eip = context->Eip;
844 vm86->regs.cs = context->SegCs;
845 vm86->regs.ds = context->SegDs;
846 vm86->regs.es = context->SegEs;
847 vm86->regs.fs = context->SegFs;
848 vm86->regs.gs = context->SegGs;
849 vm86->regs.ss = context->SegSs;
850 vm86->regs.eflags = context->EFlags;
851 }
852
853
854 /**********************************************************************
855 * merge_vm86_pending_flags
856 *
857 * Merges TEB.vm86_ptr and TEB.vm86_pending VIP flags and
858 * raises exception if there are pending events and VIF flag
859 * has been turned on.
860 *
861 * Called from __wine_enter_vm86 because vm86_enter
862 * doesn't check for pending events.
863 *
864 * Called from raise_vm86_sti_exception to check for
865 * pending events in a signal safe way.
866 */
867 static void merge_vm86_pending_flags( EXCEPTION_RECORD *rec )
868 {
869 BOOL check_pending = TRUE;
870 struct vm86plus_struct *vm86 =
871 (struct vm86plus_struct*)x86_thread_data()->vm86_ptr;
872
873 /*
874 * In order to prevent a race when SIGUSR2 occurs while
875 * we are returning from exception handler, pending events
876 * will be rechecked after each raised exception.
877 */
878 while (check_pending && get_vm86_teb_info()->vm86_pending)
879 {
880 check_pending = FALSE;
881 x86_thread_data()->vm86_ptr = NULL;
882
883 /*
884 * If VIF is set, throw exception.
885 * Note that SIGUSR2 may turn VIF flag off so
886 * VIF check must occur only when TEB.vm86_ptr is NULL.
887 */
888 if (vm86->regs.eflags & VIF_FLAG)
889 {
890 CONTEXT vcontext;
891 save_vm86_context( &vcontext, vm86 );
892
893 rec->ExceptionCode = EXCEPTION_VM86_STI;
894 rec->ExceptionFlags = EXCEPTION_CONTINUABLE;
895 rec->ExceptionRecord = NULL;
896 rec->NumberParameters = 0;
897 rec->ExceptionAddress = (LPVOID)vcontext.Eip;
898
899 vcontext.EFlags &= ~VIP_FLAG;
900 get_vm86_teb_info()->vm86_pending = 0;
901 raise_exception( rec, &vcontext, TRUE );
902
903 restore_vm86_context( &vcontext, vm86 );
904 check_pending = TRUE;
905 }
906
907 x86_thread_data()->vm86_ptr = vm86;
908 }
909
910 /*
911 * Merge VIP flags in a signal safe way. This requires
912 * that the following operation compiles into atomic
913 * instruction.
914 */
915 vm86->regs.eflags |= get_vm86_teb_info()->vm86_pending;
916 }
917 #endif /* __HAVE_VM86 */
918
919
920 #ifdef __sun
921
922 /* We have to workaround two Solaris breakages:
923 * - Solaris doesn't restore %ds and %es before calling the signal handler so exceptions in 16-bit
924 * code crash badly.
925 * - Solaris inserts a libc trampoline to call our handler, but the trampoline expects that registers
926 * are setup correctly. So we need to insert our own trampoline below the libc trampoline to set %gs.
927 */
928
929 extern int sigaction_syscall( int sig, const struct sigaction *new, struct sigaction *old );
930 __ASM_GLOBAL_FUNC( sigaction_syscall,
931 "movl $0x62,%eax\n\t"
932 "int $0x91\n\t"
933 "ret" )
934
935 /* assume the same libc handler is used for all signals */
936 static void (*libc_sigacthandler)( int signal, siginfo_t *siginfo, void *context );
937
938 static void wine_sigacthandler( int signal, siginfo_t *siginfo, void *sigcontext )
939 {
940 struct x86_thread_data *thread_data;
941
942 __asm__ __volatile__("mov %ss,%ax; mov %ax,%ds; mov %ax,%es");
943
944 thread_data = (struct x86_thread_data *)get_current_teb()->SystemReserved2;
945 wine_set_fs( thread_data->fs );
946 wine_set_gs( thread_data->gs );
947
948 libc_sigacthandler( signal, siginfo, sigcontext );
949 }
950
951 static int solaris_sigaction( int sig, const struct sigaction *new, struct sigaction *old )
952 {
953 struct sigaction real_act;
954
955 if (sigaction( sig, new, old ) == -1) return -1;
956
957 /* retrieve the real handler and flags with a direct syscall */
958 sigaction_syscall( sig, NULL, &real_act );
959 libc_sigacthandler = real_act.sa_sigaction;
960 real_act.sa_sigaction = wine_sigacthandler;
961 sigaction_syscall( sig, &real_act, NULL );
962 return 0;
963 }
964 #define sigaction(sig,new,old) solaris_sigaction(sig,new,old)
965
966 #endif
967
968 typedef void (WINAPI *raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context );
969
970 extern void clear_alignment_flag(void);
971 __ASM_GLOBAL_FUNC( clear_alignment_flag,
972 "pushfl\n\t"
973 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
974 "andl $~0x40000,(%esp)\n\t"
975 "popfl\n\t"
976 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
977 "ret" )
978
979
980 /***********************************************************************
981 * init_handler
982 *
983 * Handler initialization when the full context is not needed.
984 * Return the stack pointer to use for pushing the exception data.
985 */
986 static inline void *init_handler( const ucontext_t *sigcontext, WORD *fs, WORD *gs )
987 {
988 TEB *teb = get_current_teb();
989
990 clear_alignment_flag();
991
992 /* get %fs and %gs at time of the fault */
993 #ifdef FS_sig
994 *fs = LOWORD(FS_sig(sigcontext));
995 #else
996 *fs = wine_get_fs();
997 #endif
998 #ifdef GS_sig
999 *gs = LOWORD(GS_sig(sigcontext));
1000 #else
1001 *gs = wine_get_gs();
1002 #endif
1003
1004 #ifndef __sun /* see above for Solaris handling */
1005 {
1006 struct x86_thread_data *thread_data = (struct x86_thread_data *)teb->SystemReserved2;
1007 wine_set_fs( thread_data->fs );
1008 wine_set_gs( thread_data->gs );
1009 }
1010 #endif
1011
1012 if (!wine_ldt_is_system(CS_sig(sigcontext)) ||
1013 !wine_ldt_is_system(SS_sig(sigcontext))) /* 16-bit mode */
1014 {
1015 /*
1016 * Win16 or DOS protected mode. Note that during switch
1017 * from 16-bit mode to linear mode, CS may be set to system
1018 * segment before FS is restored. Fortunately, in this case
1019 * SS is still non-system segment. This is why both CS and SS
1020 * are checked.
1021 */
1022 return teb->WOW32Reserved;
1023 }
1024 return (void *)(ESP_sig(sigcontext) & ~3);
1025 }
1026
1027
1028 /***********************************************************************
1029 * save_fpu
1030 *
1031 * Save the thread FPU context.
1032 */
1033 static inline void save_fpu( CONTEXT *context )
1034 {
1035 #ifdef __GNUC__
1036 context->ContextFlags |= CONTEXT_FLOATING_POINT;
1037 __asm__ __volatile__( "fnsave %0; fwait" : "=m" (context->FloatSave) );
1038 #endif
1039 }
1040
1041
1042 /***********************************************************************
1043 * restore_fpu
1044 *
1045 * Restore the FPU context to a sigcontext.
1046 */
1047 static inline void restore_fpu( const CONTEXT *context )
1048 {
1049 FLOATING_SAVE_AREA float_status = context->FloatSave;
1050 /* reset the current interrupt status */
1051 float_status.StatusWord &= float_status.ControlWord | 0xffffff80;
1052 #ifdef __GNUC__
1053 __asm__ __volatile__( "frstor %0; fwait" : : "m" (float_status) );
1054 #endif /* __GNUC__ */
1055 }
1056
1057
1058 /***********************************************************************
1059 * restore_fpux
1060 *
1061 * Restore the FPU extended context to a sigcontext.
1062 */
1063 static inline void restore_fpux( const CONTEXT *context )
1064 {
1065 #ifdef __GNUC__
1066 /* we have to enforce alignment by hand */
1067 char buffer[sizeof(XMM_SAVE_AREA32) + 16];
1068 XMM_SAVE_AREA32 *state = (XMM_SAVE_AREA32 *)(((ULONG_PTR)buffer + 15) & ~15);
1069
1070 memcpy( state, context->ExtendedRegisters, sizeof(*state) );
1071 /* reset the current interrupt status */
1072 state->StatusWord &= state->ControlWord | 0xff80;
1073 __asm__ __volatile__( "fxrstor %0" : : "m" (*state) );
1074 #endif
1075 }
1076
1077
1078 /***********************************************************************
1079 * fpux_to_fpu
1080 *
1081 * Build a standard FPU context from an extended one.
1082 */
1083 static void fpux_to_fpu( FLOATING_SAVE_AREA *fpu, const XMM_SAVE_AREA32 *fpux )
1084 {
1085 unsigned int i, tag, stack_top;
1086
1087 fpu->ControlWord = fpux->ControlWord | 0xffff0000;
1088 fpu->StatusWord = fpux->StatusWord | 0xffff0000;
1089 fpu->ErrorOffset = fpux->ErrorOffset;
1090 fpu->ErrorSelector = fpux->ErrorSelector | (fpux->ErrorOpcode << 16);
1091 fpu->DataOffset = fpux->DataOffset;
1092 fpu->DataSelector = fpux->DataSelector;
1093 fpu->Cr0NpxState = fpux->StatusWord | 0xffff0000;
1094
1095 stack_top = (fpux->StatusWord >> 11) & 7;
1096 fpu->TagWord = 0xffff0000;
1097 for (i = 0; i < 8; i++)
1098 {
1099 memcpy( &fpu->RegisterArea[10 * i], &fpux->FloatRegisters[i], 10 );
1100 if (!(fpux->TagWord & (1 << i))) tag = 3; /* empty */
1101 else
1102 {
1103 const M128A *reg = &fpux->FloatRegisters[(i - stack_top) & 7];
1104 if ((reg->High & 0x7fff) == 0x7fff) /* exponent all ones */
1105 {
1106 tag = 2; /* special */
1107 }
1108 else if (!(reg->High & 0x7fff)) /* exponent all zeroes */
1109 {
1110 if (reg->Low) tag = 2; /* special */
1111 else tag = 1; /* zero */
1112 }
1113 else
1114 {
1115 if (reg->Low >> 63) tag = 0; /* valid */
1116 else tag = 2; /* special */
1117 }
1118 }
1119 fpu->TagWord |= tag << (2 * i);
1120 }
1121 }
1122
1123
1124 /***********************************************************************
1125 * save_context
1126 *
1127 * Build a context structure from the signal info.
1128 */
1129 static inline void save_context( CONTEXT *context, const ucontext_t *sigcontext, WORD fs, WORD gs )
1130 {
1131 FLOATING_SAVE_AREA *fpu = FPU_sig(sigcontext);
1132 XMM_SAVE_AREA32 *fpux = FPUX_sig(sigcontext);
1133
1134 memset(context, 0, sizeof(*context));
1135 context->ContextFlags = CONTEXT_FULL | CONTEXT_DEBUG_REGISTERS;
1136 context->Eax = EAX_sig(sigcontext);
1137 context->Ebx = EBX_sig(sigcontext);
1138 context->Ecx = ECX_sig(sigcontext);
1139 context->Edx = EDX_sig(sigcontext);
1140 context->Esi = ESI_sig(sigcontext);
1141 context->Edi = EDI_sig(sigcontext);
1142 context->Ebp = EBP_sig(sigcontext);
1143 context->EFlags = EFL_sig(sigcontext);
1144 context->Eip = EIP_sig(sigcontext);
1145 context->Esp = ESP_sig(sigcontext);
1146 context->SegCs = LOWORD(CS_sig(sigcontext));
1147 context->SegDs = LOWORD(DS_sig(sigcontext));
1148 context->SegEs = LOWORD(ES_sig(sigcontext));
1149 context->SegFs = fs;
1150 context->SegGs = gs;
1151 context->SegSs = LOWORD(SS_sig(sigcontext));
1152 context->Dr0 = x86_thread_data()->dr0;
1153 context->Dr1 = x86_thread_data()->dr1;
1154 context->Dr2 = x86_thread_data()->dr2;
1155 context->Dr3 = x86_thread_data()->dr3;
1156 context->Dr6 = x86_thread_data()->dr6;
1157 context->Dr7 = x86_thread_data()->dr7;
1158
1159 if (fpu)
1160 {
1161 context->ContextFlags |= CONTEXT_FLOATING_POINT;
1162 context->FloatSave = *fpu;
1163 }
1164 if (fpux)
1165 {
1166 context->ContextFlags |= CONTEXT_FLOATING_POINT | CONTEXT_EXTENDED_REGISTERS;
1167 memcpy( context->ExtendedRegisters, fpux, sizeof(*fpux) );
1168 fpux_support = TRUE;
1169 if (!fpu) fpux_to_fpu( &context->FloatSave, fpux );
1170 }
1171 if (!fpu && !fpux) save_fpu( context );
1172 }
1173
1174
1175 /***********************************************************************
1176 * restore_context
1177 *
1178 * Restore the signal info from the context.
1179 */
1180 static inline void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
1181 {
1182 FLOATING_SAVE_AREA *fpu = FPU_sig(sigcontext);
1183 XMM_SAVE_AREA32 *fpux = FPUX_sig(sigcontext);
1184
1185 x86_thread_data()->dr0 = context->Dr0;
1186 x86_thread_data()->dr1 = context->Dr1;
1187 x86_thread_data()->dr2 = context->Dr2;
1188 x86_thread_data()->dr3 = context->Dr3;
1189 x86_thread_data()->dr6 = context->Dr6;
1190 x86_thread_data()->dr7 = context->Dr7;
1191 EAX_sig(sigcontext) = context->Eax;
1192 EBX_sig(sigcontext) = context->Ebx;
1193 ECX_sig(sigcontext) = context->Ecx;
1194 EDX_sig(sigcontext) = context->Edx;
1195 ESI_sig(sigcontext) = context->Esi;
1196 EDI_sig(sigcontext) = context->Edi;
1197 EBP_sig(sigcontext) = context->Ebp;
1198 EFL_sig(sigcontext) = context->EFlags;
1199 EIP_sig(sigcontext) = context->Eip;
1200 ESP_sig(sigcontext) = context->Esp;
1201 CS_sig(sigcontext) = context->SegCs;
1202 DS_sig(sigcontext) = context->SegDs;
1203 ES_sig(sigcontext) = context->SegEs;
1204 SS_sig(sigcontext) = context->SegSs;
1205 #ifdef GS_sig
1206 GS_sig(sigcontext) = context->SegGs;
1207 #else
1208 wine_set_gs( context->SegGs );
1209 #endif
1210 #ifdef FS_sig
1211 FS_sig(sigcontext) = context->SegFs;
1212 #else
1213 wine_set_fs( context->SegFs );
1214 #endif
1215
1216 if (fpu) *fpu = context->FloatSave;
1217 if (fpux) memcpy( fpux, context->ExtendedRegisters, sizeof(*fpux) );
1218 if (!fpu && !fpux) restore_fpu( context );
1219 }
1220
1221
1222 /***********************************************************************
1223 * RtlCaptureContext (NTDLL.@)
1224 */
1225 __ASM_STDCALL_FUNC( RtlCaptureContext, 4,
1226 "pushl %eax\n\t"
1227 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
1228 "movl 8(%esp),%eax\n\t" /* context */
1229 "movl $0x10007,(%eax)\n\t" /* context->ContextFlags */
1230 "movw %gs,0x8c(%eax)\n\t" /* context->SegGs */
1231 "movw %fs,0x90(%eax)\n\t" /* context->SegFs */
1232 "movw %es,0x94(%eax)\n\t" /* context->SegEs */
1233 "movw %ds,0x98(%eax)\n\t" /* context->SegDs */
1234 "movl %edi,0x9c(%eax)\n\t" /* context->Edi */
1235 "movl %esi,0xa0(%eax)\n\t" /* context->Esi */
1236 "movl %ebx,0xa4(%eax)\n\t" /* context->Ebx */
1237 "movl %edx,0xa8(%eax)\n\t" /* context->Edx */
1238 "movl %ecx,0xac(%eax)\n\t" /* context->Ecx */
1239 "movl 0(%ebp),%edx\n\t"
1240 "movl %edx,0xb4(%eax)\n\t" /* context->Ebp */
1241 "movl 4(%ebp),%edx\n\t"
1242 "movl %edx,0xb8(%eax)\n\t" /* context->Eip */
1243 "movw %cs,0xbc(%eax)\n\t" /* context->SegCs */
1244 "pushfl\n\t"
1245 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
1246 "popl 0xc0(%eax)\n\t" /* context->EFlags */
1247 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
1248 "leal 8(%ebp),%edx\n\t"
1249 "movl %edx,0xc4(%eax)\n\t" /* context->Esp */
1250 "movw %ss,0xc8(%eax)\n\t" /* context->SegSs */
1251 "popl 0xb0(%eax)\n\t" /* context->Eax */
1252 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
1253 "ret $4" )
1254
1255 /***********************************************************************
1256 * set_full_cpu_context
1257 *
1258 * Set the new CPU context.
1259 */
1260 extern void set_full_cpu_context( const CONTEXT *context );
1261 __ASM_GLOBAL_FUNC( set_full_cpu_context,
1262 "movl 4(%esp),%ecx\n\t"
1263 "movw 0x8c(%ecx),%gs\n\t" /* SegGs */
1264 "movw 0x90(%ecx),%fs\n\t" /* SegFs */
1265 "movw 0x94(%ecx),%es\n\t" /* SegEs */
1266 "movl 0x9c(%ecx),%edi\n\t" /* Edi */
1267 "movl 0xa0(%ecx),%esi\n\t" /* Esi */
1268 "movl 0xa4(%ecx),%ebx\n\t" /* Ebx */
1269 "movl 0xb4(%ecx),%ebp\n\t" /* Ebp */
1270 "movw %ss,%ax\n\t"
1271 "cmpw 0xc8(%ecx),%ax\n\t" /* SegSs */
1272 "jne 1f\n\t"
1273 /* As soon as we have switched stacks the context structure could
1274 * be invalid (when signal handlers are executed for example). Copy
1275 * values on the target stack before changing ESP. */
1276 "movl 0xc4(%ecx),%eax\n\t" /* Esp */
1277 "leal -4*4(%eax),%eax\n\t"
1278 "movl 0xc0(%ecx),%edx\n\t" /* EFlags */
1279 "movl %edx,3*4(%eax)\n\t"
1280 "movl 0xbc(%ecx),%edx\n\t" /* SegCs */
1281 "movl %edx,2*4(%eax)\n\t"
1282 "movl 0xb8(%ecx),%edx\n\t" /* Eip */
1283 "movl %edx,1*4(%eax)\n\t"
1284 "movl 0xb0(%ecx),%edx\n\t" /* Eax */
1285 "movl %edx,0*4(%eax)\n\t"
1286 "pushl 0x98(%ecx)\n\t" /* SegDs */
1287 "movl 0xa8(%ecx),%edx\n\t" /* Edx */
1288 "movl 0xac(%ecx),%ecx\n\t" /* Ecx */
1289 "popl %ds\n\t"
1290 "movl %eax,%esp\n\t"
1291 "popl %eax\n\t"
1292 "iret\n"
1293 /* Restore the context when the stack segment changes. We can't use
1294 * the same code as above because we do not know if the stack segment
1295 * is 16 or 32 bit, and 'movl' will throw an exception when we try to
1296 * access memory above the limit. */
1297 "1:\n\t"
1298 "movl 0xa8(%ecx),%edx\n\t" /* Edx */
1299 "movl 0xb0(%ecx),%eax\n\t" /* Eax */
1300 "movw 0xc8(%ecx),%ss\n\t" /* SegSs */
1301 "movl 0xc4(%ecx),%esp\n\t" /* Esp */
1302 "pushl 0xc0(%ecx)\n\t" /* EFlags */
1303 "pushl 0xbc(%ecx)\n\t" /* SegCs */
1304 "pushl 0xb8(%ecx)\n\t" /* Eip */
1305 "pushl 0x98(%ecx)\n\t" /* SegDs */
1306 "movl 0xac(%ecx),%ecx\n\t" /* Ecx */
1307 "popl %ds\n\t"
1308 "iret" )
1309
1310
1311 /***********************************************************************
1312 * set_cpu_context
1313 *
1314 * Set the new CPU context. Used by NtSetContextThread.
1315 */
1316 void DECLSPEC_HIDDEN set_cpu_context( const CONTEXT *context )
1317 {
1318 DWORD flags = context->ContextFlags & ~CONTEXT_i386;
1319
1320 if ((flags & CONTEXT_EXTENDED_REGISTERS) && fpux_support) restore_fpux( context );
1321 else if (flags & CONTEXT_FLOATING_POINT) restore_fpu( context );
1322
1323 if (flags & CONTEXT_DEBUG_REGISTERS)
1324 {
1325 x86_thread_data()->dr0 = context->Dr0;
1326 x86_thread_data()->dr1 = context->Dr1;
1327 x86_thread_data()->dr2 = context->Dr2;
1328 x86_thread_data()->dr3 = context->Dr3;
1329 x86_thread_data()->dr6 = context->Dr6;
1330 x86_thread_data()->dr7 = context->Dr7;
1331 }
1332 if (flags & CONTEXT_FULL)
1333 {
1334 if (!(flags & CONTEXT_CONTROL))
1335 FIXME( "setting partial context (%x) not supported\n", flags );
1336 else if (flags & CONTEXT_SEGMENTS)
1337 set_full_cpu_context( context );
1338 else
1339 {
1340 CONTEXT newcontext = *context;
1341 newcontext.SegDs = wine_get_ds();
1342 newcontext.SegEs = wine_get_es();
1343 newcontext.SegFs = wine_get_fs();
1344 newcontext.SegGs = wine_get_gs();
1345 set_full_cpu_context( &newcontext );
1346 }
1347 }
1348 }
1349
1350
1351 /***********************************************************************
1352 * context_to_server
1353 *
1354 * Convert a register context to the server format.
1355 */
1356 NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
1357 {
1358 DWORD flags = from->ContextFlags & ~CONTEXT_i386; /* get rid of CPU id */
1359
1360 memset( to, 0, sizeof(*to) );
1361 to->cpu = CPU_x86;
1362
1363 if (flags & CONTEXT_CONTROL)
1364 {
1365 to->flags |= SERVER_CTX_CONTROL;
1366 to->ctl.i386_regs.ebp = from->Ebp;
1367 to->ctl.i386_regs.esp = from->Esp;
1368 to->ctl.i386_regs.eip = from->Eip;
1369 to->ctl.i386_regs.cs = from->SegCs;
1370 to->ctl.i386_regs.ss = from->SegSs;
1371 to->ctl.i386_regs.eflags = from->EFlags;
1372 }
1373 if (flags & CONTEXT_INTEGER)
1374 {
1375 to->flags |= SERVER_CTX_INTEGER;
1376 to->integer.i386_regs.eax = from->Eax;
1377 to->integer.i386_regs.ebx = from->Ebx;
1378 to->integer.i386_regs.ecx = from->Ecx;
1379 to->integer.i386_regs.edx = from->Edx;
1380 to->integer.i386_regs.esi = from->Esi;
1381 to->integer.i386_regs.edi = from->Edi;
1382 }
1383 if (flags & CONTEXT_SEGMENTS)
1384 {
1385 to->flags |= SERVER_CTX_SEGMENTS;
1386 to->seg.i386_regs.ds = from->SegDs;
1387 to->seg.i386_regs.es = from->SegEs;
1388 to->seg.i386_regs.fs = from->SegFs;
1389 to->seg.i386_regs.gs = from->SegGs;
1390 }
1391 if (flags & CONTEXT_FLOATING_POINT)
1392 {
1393 to->flags |= SERVER_CTX_FLOATING_POINT;
1394 to->fp.i386_regs.ctrl = from->FloatSave.ControlWord;
1395 to->fp.i386_regs.status = from->FloatSave.StatusWord;
1396 to->fp.i386_regs.tag = from->FloatSave.TagWord;
1397 to->fp.i386_regs.err_off = from->FloatSave.ErrorOffset;
1398 to->fp.i386_regs.err_sel = from->FloatSave.ErrorSelector;
1399 to->fp.i386_regs.data_off = from->FloatSave.DataOffset;
1400 to->fp.i386_regs.data_sel = from->FloatSave.DataSelector;
1401 to->fp.i386_regs.cr0npx = from->FloatSave.Cr0NpxState;
1402 memcpy( to->fp.i386_regs.regs, from->FloatSave.RegisterArea, sizeof(to->fp.i386_regs.regs) );
1403 }
1404 if (flags & CONTEXT_DEBUG_REGISTERS)
1405 {
1406 to->flags |= SERVER_CTX_DEBUG_REGISTERS;
1407 to->debug.i386_regs.dr0 = from->Dr0;
1408 to->debug.i386_regs.dr1 = from->Dr1;
1409 to->debug.i386_regs.dr2 = from->Dr2;
1410 to->debug.i386_regs.dr3 = from->Dr3;
1411 to->debug.i386_regs.dr6 = from->Dr6;
1412 to->debug.i386_regs.dr7 = from->Dr7;
1413 }
1414 if (flags & CONTEXT_EXTENDED_REGISTERS)
1415 {
1416 to->flags |= SERVER_CTX_EXTENDED_REGISTERS;
1417 memcpy( to->ext.i386_regs, from->ExtendedRegisters, sizeof(to->ext.i386_regs) );
1418 }
1419 return STATUS_SUCCESS;
1420 }
1421
1422
1423 /***********************************************************************
1424 * context_from_server
1425 *
1426 * Convert a register context from the server format.
1427 */
1428 NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
1429 {
1430 if (from->cpu != CPU_x86) return STATUS_INVALID_PARAMETER;
1431
1432 to->ContextFlags = CONTEXT_i386;
1433 if (from->flags & SERVER_CTX_CONTROL)
1434 {
1435 to->ContextFlags |= CONTEXT_CONTROL;
1436 to->Ebp = from->ctl.i386_regs.ebp;
1437 to->Esp = from->ctl.i386_regs.esp;
1438 to->Eip = from->ctl.i386_regs.eip;
1439 to->SegCs = from->ctl.i386_regs.cs;
1440 to->SegSs = from->ctl.i386_regs.ss;
1441 to->EFlags = from->ctl.i386_regs.eflags;
1442 }
1443 if (from->flags & SERVER_CTX_INTEGER)
1444 {
1445 to->ContextFlags |= CONTEXT_INTEGER;
1446 to->Eax = from->integer.i386_regs.eax;
1447 to->Ebx = from->integer.i386_regs.ebx;
1448 to->Ecx = from->integer.i386_regs.ecx;
1449 to->Edx = from->integer.i386_regs.edx;
1450 to->Esi = from->integer.i386_regs.esi;
1451 to->Edi = from->integer.i386_regs.edi;
1452 }
1453 if (from->flags & SERVER_CTX_SEGMENTS)
1454 {
1455 to->ContextFlags |= CONTEXT_SEGMENTS;
1456 to->SegDs = from->seg.i386_regs.ds;
1457 to->SegEs = from->seg.i386_regs.es;
1458 to->SegFs = from->seg.i386_regs.fs;
1459 to->SegGs = from->seg.i386_regs.gs;
1460 }
1461 if (from->flags & SERVER_CTX_FLOATING_POINT)
1462 {
1463 to->ContextFlags |= CONTEXT_FLOATING_POINT;
1464 to->FloatSave.ControlWord = from->fp.i386_regs.ctrl;
1465 to->FloatSave.StatusWord = from->fp.i386_regs.status;
1466 to->FloatSave.TagWord = from->fp.i386_regs.tag;
1467 to->FloatSave.ErrorOffset = from->fp.i386_regs.err_off;
1468 to->FloatSave.ErrorSelector = from->fp.i386_regs.err_sel;
1469 to->FloatSave.DataOffset = from->fp.i386_regs.data_off;
1470 to->FloatSave.DataSelector = from->fp.i386_regs.data_sel;
1471 to->FloatSave.Cr0NpxState = from->fp.i386_regs.cr0npx;
1472 memcpy( to->FloatSave.RegisterArea, from->fp.i386_regs.regs, sizeof(to->FloatSave.RegisterArea) );
1473 }
1474 if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
1475 {
1476 to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
1477 to->Dr0 = from->debug.i386_regs.dr0;
1478 to->Dr1 = from->debug.i386_regs.dr1;
1479 to->Dr2 = from->debug.i386_regs.dr2;
1480 to->Dr3 = from->debug.i386_regs.dr3;
1481 to->Dr6 = from->debug.i386_regs.dr6;
1482 to->Dr7 = from->debug.i386_regs.dr7;
1483 }
1484 if (from->flags & SERVER_CTX_EXTENDED_REGISTERS)
1485 {
1486 to->ContextFlags |= CONTEXT_EXTENDED_REGISTERS;
1487 memcpy( to->ExtendedRegisters, from->ext.i386_regs, sizeof(to->ExtendedRegisters) );
1488 }
1489 return STATUS_SUCCESS;
1490 }
1491
1492
1493 /***********************************************************************
1494 * NtSetContextThread (NTDLL.@)
1495 * ZwSetContextThread (NTDLL.@)
1496 */
1497 NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
1498 {
1499 NTSTATUS ret = STATUS_SUCCESS;
1500 BOOL self = (handle == GetCurrentThread());
1501
1502 /* debug registers require a server call */
1503 if (self && (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386)))
1504 self = (x86_thread_data()->dr0 == context->Dr0 &&
1505 x86_thread_data()->dr1 == context->Dr1 &&
1506 x86_thread_data()->dr2 == context->Dr2 &&
1507 x86_thread_data()->dr3 == context->Dr3 &&
1508 x86_thread_data()->dr6 == context->Dr6 &&
1509 x86_thread_data()->dr7 == context->Dr7);
1510
1511 if (!self) ret = set_thread_context( handle, context, &self );
1512
1513 if (self && ret == STATUS_SUCCESS) set_cpu_context( context );
1514 return ret;
1515 }
1516
1517
1518 /***********************************************************************
1519 * NtGetContextThread (NTDLL.@)
1520 * ZwGetContextThread (NTDLL.@)
1521 *
1522 * Note: we use a small assembly wrapper to save the necessary registers
1523 * in case we are fetching the context of the current thread.
1524 */
1525 NTSTATUS CDECL DECLSPEC_HIDDEN __regs_NtGetContextThread( DWORD edi, DWORD esi, DWORD ebx, DWORD eflags,
1526 DWORD ebp, DWORD retaddr, HANDLE handle,
1527 CONTEXT *context )
1528 {
1529 NTSTATUS ret;
1530 DWORD needed_flags = context->ContextFlags & ~CONTEXT_i386;
1531 BOOL self = (handle == GetCurrentThread());
1532
1533 /* debug registers require a server call */
1534 if (needed_flags & CONTEXT_DEBUG_REGISTERS) self = FALSE;
1535
1536 if (!self)
1537 {
1538 if ((ret = get_thread_context( handle, context, &self ))) return ret;
1539 needed_flags &= ~context->ContextFlags;
1540 }
1541
1542 if (self)
1543 {
1544 if (needed_flags & CONTEXT_INTEGER)
1545 {
1546 context->Eax = 0;
1547 context->Ebx = ebx;
1548 context->Ecx = 0;
1549 context->Edx = 0;
1550 context->Esi = esi;
1551 context->Edi = edi;
1552 context->ContextFlags |= CONTEXT_INTEGER;
1553 }
1554 if (needed_flags & CONTEXT_CONTROL)
1555 {
1556 context->Ebp = ebp;
1557 context->Esp = (DWORD)&retaddr;
1558 context->Eip = *(&edi - 1);
1559 context->SegCs = wine_get_cs();
1560 context->SegSs = wine_get_ss();
1561 context->EFlags = eflags;
1562 context->ContextFlags |= CONTEXT_CONTROL;
1563 }
1564 if (needed_flags & CONTEXT_SEGMENTS)
1565 {
1566 context->SegDs = wine_get_ds();
1567 context->SegEs = wine_get_es();
1568 context->SegFs = wine_get_fs();
1569 context->SegGs = wine_get_gs();
1570 context->ContextFlags |= CONTEXT_SEGMENTS;
1571 }
1572 if (needed_flags & CONTEXT_FLOATING_POINT) save_fpu( context );
1573 /* FIXME: extended floating point */
1574 /* update the cached version of the debug registers */
1575 if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386))
1576 {
1577 x86_thread_data()->dr0 = context->Dr0;
1578 x86_thread_data()->dr1 = context->Dr1;
1579 x86_thread_data()->dr2 = context->Dr2;
1580 x86_thread_data()->dr3 = context->Dr3;
1581 x86_thread_data()->dr6 = context->Dr6;
1582 x86_thread_data()->dr7 = context->Dr7;
1583 }
1584 }
1585
1586 if (context->ContextFlags & (CONTEXT_INTEGER & ~CONTEXT_i386))
1587 TRACE( "%p: eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n", handle,
1588 context->Eax, context->Ebx, context->Ecx, context->Edx, context->Esi, context->Edi );
1589 if (context->ContextFlags & (CONTEXT_CONTROL & ~CONTEXT_i386))
1590 TRACE( "%p: ebp=%08x esp=%08x eip=%08x cs=%04x ss=%04x flags=%08x\n", handle,
1591 context->Ebp, context->Esp, context->Eip, context->SegCs, context->SegSs, context->EFlags );
1592 if (context->ContextFlags & (CONTEXT_SEGMENTS & ~CONTEXT_i386))
1593 TRACE( "%p: ds=%04x es=%04x fs=%04x gs=%04x\n", handle,
1594 context->SegDs, context->SegEs, context->SegFs, context->SegGs );
1595 if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386))
1596 TRACE( "%p: dr0=%08x dr1=%08x dr2=%08x dr3=%08x dr6=%08x dr7=%08x\n", handle,
1597 context->Dr0, context->Dr1, context->Dr2, context->Dr3, context->Dr6, context->Dr7 );
1598
1599 return STATUS_SUCCESS;
1600 }
1601 __ASM_STDCALL_FUNC( NtGetContextThread, 8,
1602 "pushl %ebp\n\t"
1603 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
1604 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
1605 "movl %esp,%ebp\n\t"
1606 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
1607 "pushfl\n\t"
1608 "pushl %ebx\n\t"
1609 __ASM_CFI(".cfi_rel_offset %ebx,-8\n\t")
1610 "pushl %esi\n\t"
1611 __ASM_CFI(".cfi_rel_offset %esi,-12\n\t")
1612 "pushl %edi\n\t"
1613 __ASM_CFI(".cfi_rel_offset %edi,-16\n\t")
1614 "call " __ASM_NAME("__regs_NtGetContextThread") "\n\t"
1615 "leave\n\t"
1616 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
1617 __ASM_CFI(".cfi_same_value %ebp\n\t")
1618 "ret $8" )
1619
1620
1621 /***********************************************************************
1622 * is_privileged_instr
1623 *
1624 * Check if the fault location is a privileged instruction.
1625 * Based on the instruction emulation code in dlls/kernel/instr.c.
1626 */
1627 static inline DWORD is_privileged_instr( CONTEXT *context )
1628 {
1629 const BYTE *instr;
1630 unsigned int prefix_count = 0;
1631
1632 if (!wine_ldt_is_system( context->SegCs )) return 0;
1633 instr = (BYTE *)context->Eip;
1634
1635 for (;;) switch(*instr)
1636 {
1637 /* instruction prefixes */
1638 case 0x2e: /* %cs: */
1639 case 0x36: /* %ss: */
1640 case 0x3e: /* %ds: */
1641 case 0x26: /* %es: */
1642 case 0x64: /* %fs: */
1643 case 0x65: /* %gs: */
1644 case 0x66: /* opcode size */
1645 case 0x67: /* addr size */
1646 case 0xf0: /* lock */
1647 case 0xf2: /* repne */
1648 case 0xf3: /* repe */
1649 if (++prefix_count >= 15) return EXCEPTION_ILLEGAL_INSTRUCTION;
1650 instr++;
1651 continue;
1652
1653 case 0x0f: /* extended instruction */
1654 switch(instr[1])
1655 {
1656 case 0x20: /* mov crX, reg */
1657 case 0x21: /* mov drX, reg */
1658 case 0x22: /* mov reg, crX */
1659 case 0x23: /* mov reg drX */
1660 return EXCEPTION_PRIV_INSTRUCTION;
1661 }
1662 return 0;
1663 case 0x6c: /* insb (%dx) */
1664 case 0x6d: /* insl (%dx) */
1665 case 0x6e: /* outsb (%dx) */
1666 case 0x6f: /* outsl (%dx) */
1667 case 0xcd: /* int $xx */
1668 case 0xe4: /* inb al,XX */
1669 case 0xe5: /* in (e)ax,XX */
1670 case 0xe6: /* outb XX,al */
1671 case 0xe7: /* out XX,(e)ax */
1672 case 0xec: /* inb (%dx),%al */
1673 case 0xed: /* inl (%dx),%eax */
1674 case 0xee: /* outb %al,(%dx) */
1675 case 0xef: /* outl %eax,(%dx) */
1676 case 0xf4: /* hlt */
1677 case 0xfa: /* cli */
1678 case 0xfb: /* sti */
1679 return EXCEPTION_PRIV_INSTRUCTION;
1680 default:
1681 return 0;
1682 }
1683 }
1684
1685
1686 /***********************************************************************
1687 * handle_interrupt
1688 *
1689 * Handle an interrupt.
1690 */
1691 static inline BOOL handle_interrupt( unsigned int interrupt, EXCEPTION_RECORD *rec, CONTEXT *context )
1692 {
1693 switch(interrupt)
1694 {
1695 case 0x2d:
1696 context->Eip += 3;
1697 rec->ExceptionCode = EXCEPTION_BREAKPOINT;
1698 rec->ExceptionAddress = (void *)context->Eip;
1699 rec->NumberParameters = is_wow64 ? 1 : 3;
1700 rec->ExceptionInformation[0] = context->Eax;
1701 rec->ExceptionInformation[1] = context->Ecx;
1702 rec->ExceptionInformation[2] = context->Edx;
1703 return TRUE;
1704 default:
1705 return FALSE;
1706 }
1707 }
1708
1709
1710 /***********************************************************************
1711 * check_invalid_gs
1712 *
1713 * Check for fault caused by invalid %gs value (some copy protection schemes mess with it).
1714 */
1715 static inline BOOL check_invalid_gs( CONTEXT *context )
1716 {
1717 unsigned int prefix_count = 0;
1718 const BYTE *instr = (BYTE *)context->Eip;
1719 WORD system_gs = x86_thread_data()->gs;
1720
1721 if (context->SegGs == system_gs) return FALSE;
1722 if (!wine_ldt_is_system( context->SegCs )) return FALSE;
1723 /* only handle faults in system libraries */
1724 if (virtual_is_valid_code_address( instr, 1 )) return FALSE;
1725
1726 for (;;) switch(*instr)
1727 {
1728 /* instruction prefixes */
1729 case 0x2e: /* %cs: */
1730 case 0x36: /* %ss: */
1731 case 0x3e: /* %ds: */
1732 case 0x26: /* %es: */
1733 case 0x64: /* %fs: */
1734 case 0x66: /* opcode size */
1735 case 0x67: /* addr size */
1736 case 0xf0: /* lock */
1737 case 0xf2: /* repne */
1738 case 0xf3: /* repe */
1739 if (++prefix_count >= 15) return FALSE;
1740 instr++;
1741 continue;
1742 case 0x65: /* %gs: */
1743 TRACE( "%04x/%04x at %p, fixing up\n", context->SegGs, system_gs, instr );
1744 context->SegGs = system_gs;
1745 return TRUE;
1746 default:
1747 return FALSE;
1748 }
1749 }
1750
1751
1752 #include "pshpack1.h"
1753 union atl_thunk
1754 {
1755 struct
1756 {
1757 DWORD movl; /* movl this,4(%esp) */
1758 DWORD this;
1759 BYTE jmp; /* jmp func */
1760 int func;
1761 } t1;
1762 struct
1763 {
1764 BYTE movl; /* movl this,ecx */
1765 DWORD this;
1766 BYTE jmp; /* jmp func */
1767 int func;
1768 } t2;
1769 struct
1770 {
1771 BYTE movl1; /* movl this,edx */
1772 DWORD this;
1773 BYTE movl2; /* movl func,ecx */
1774 DWORD func;
1775 WORD jmp; /* jmp ecx */
1776 } t3;
1777 struct
1778 {
1779 BYTE movl1; /* movl this,ecx */
1780 DWORD this;
1781 BYTE movl2; /* movl func,eax */
1782 DWORD func;
1783 WORD jmp; /* jmp eax */
1784 } t4;
1785 struct
1786 {
1787 DWORD inst1; /* pop ecx
1788 * pop eax
1789 * push ecx
1790 * jmp 4(%eax) */
1791 WORD inst2;
1792 } t5;
1793 };
1794 #include "poppack.h"
1795
1796 /**********************************************************************
1797 * check_atl_thunk
1798 *
1799 * Check if code destination is an ATL thunk, and emulate it if so.
1800 */
1801 static BOOL check_atl_thunk( EXCEPTION_RECORD *rec, CONTEXT *context )
1802 {
1803 const union atl_thunk *thunk = (const union atl_thunk *)rec->ExceptionInformation[1];
1804 union atl_thunk thunk_copy;
1805 SIZE_T thunk_len;
1806
1807 thunk_len = virtual_uninterrupted_read_memory( thunk, &thunk_copy, sizeof(*thunk) );
1808 if (!thunk_len) return FALSE;
1809
1810 if (thunk_len >= sizeof(thunk_copy.t1) && thunk_copy.t1.movl == 0x042444c7 &&
1811 thunk_copy.t1.jmp == 0xe9)
1812 {
1813 if (!virtual_uninterrupted_write_memory( (DWORD *)context->Esp + 1,
1814 &thunk_copy.t1.this, sizeof(DWORD) ))
1815 {
1816 context->Eip = (DWORD_PTR)(&thunk->t1.func + 1) + thunk_copy.t1.func;
1817 TRACE( "emulating ATL thunk type 1 at %p, func=%08x arg=%08x\n",
1818 thunk, context->Eip, thunk_copy.t1.this );
1819 return TRUE;
1820 }
1821 }
1822 else if (thunk_len >= sizeof(thunk_copy.t2) && thunk_copy.t2.movl == 0xb9 &&
1823 thunk_copy.t2.jmp == 0xe9)
1824 {
1825 context->Ecx = thunk_copy.t2.this;
1826 context->Eip = (DWORD_PTR)(&thunk->t2.func + 1) + thunk_copy.t2.func;
1827 TRACE( "emulating ATL thunk type 2 at %p, func=%08x ecx=%08x\n",
1828 thunk, context->Eip, context->Ecx );
1829 return TRUE;
1830 }
1831 else if (thunk_len >= sizeof(thunk_copy.t3) && thunk_copy.t3.movl1 == 0xba &&
1832 thunk_copy.t3.movl2 == 0xb9 &&
1833 thunk_copy.t3.jmp == 0xe1ff)
1834 {
1835 context->Edx = thunk_copy.t3.this;
1836 context->Ecx = thunk_copy.t3.func;
1837 context->Eip = thunk_copy.t3.func;
1838 TRACE( "emulating ATL thunk type 3 at %p, func=%08x ecx=%08x edx=%08x\n",
1839 thunk, context->Eip, context->Ecx, context->Edx );
1840 return TRUE;
1841 }
1842 else if (thunk_len >= sizeof(thunk_copy.t4) && thunk_copy.t4.movl1 == 0xb9 &&
1843 thunk_copy.t4.movl2 == 0xb8 &&
1844 thunk_copy.t4.jmp == 0xe0ff)
1845 {
1846 context->Ecx = thunk_copy.t4.this;
1847 context->Eax = thunk_copy.t4.func;
1848 context->Eip = thunk_copy.t4.func;
1849 TRACE( "emulating ATL thunk type 4 at %p, func=%08x eax=%08x ecx=%08x\n",
1850 thunk, context->Eip, context->Eax, context->Ecx );
1851 return TRUE;
1852 }
1853 else if (thunk_len >= sizeof(thunk_copy.t5) && thunk_copy.t5.inst1 == 0xff515859 &&
1854 thunk_copy.t5.inst2 == 0x0460)
1855 {
1856 DWORD func, stack[2];
1857 if (virtual_uninterrupted_read_memory( (DWORD *)context->Esp,
1858 stack, sizeof(stack) ) == sizeof(stack) &&
1859 virtual_uninterrupted_read_memory( (DWORD *)stack[1] + 1,
1860 &func, sizeof(DWORD) ) == sizeof(DWORD) &&
1861 !virtual_uninterrupted_write_memory( (DWORD *)context->Esp + 1, &stack[0], sizeof(stack[0]) ))
1862 {
1863 context->Ecx = stack[0];
1864 context->Eax = stack[1];
1865 context->Esp = context->Esp + sizeof(DWORD);
1866 context->Eip = func;
1867 TRACE( "emulating ATL thunk type 5 at %p, func=%08x eax=%08x ecx=%08x esp=%08x\n",
1868 thunk, context->Eip, context->Eax, context->Ecx, context->Esp );
1869 return TRUE;
1870 }
1871 }
1872
1873 return FALSE;
1874 }
1875
1876
1877 /***********************************************************************
1878 * setup_exception_record
1879 *
1880 * Setup the exception record and context on the thread stack.
1881 */
1882 static EXCEPTION_RECORD *setup_exception_record( ucontext_t *sigcontext, void *stack_ptr,
1883 WORD fs, WORD gs, raise_func func )
1884 {
1885 struct stack_layout
1886 {
1887 void *ret_addr; /* return address from raise_func */
1888 EXCEPTION_RECORD *rec_ptr; /* first arg for raise_func */
1889 CONTEXT *context_ptr; /* second arg for raise_func */
1890 CONTEXT context;
1891 EXCEPTION_RECORD rec;
1892 DWORD ebp;
1893 DWORD eip;
1894 } *stack = stack_ptr;
1895 DWORD exception_code = 0;
1896
1897 /* stack sanity checks */
1898
1899 if ((char *)stack >= (char *)get_signal_stack() &&
1900 (char *)stack < (char *)get_signal_stack() + signal_stack_size)
1901 {
1902 WINE_ERR( "nested exception on signal stack in thread %04x eip %08x esp %08x stack %p-%p\n",
1903 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1904 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit,
1905 NtCurrentTeb()->Tib.StackBase );
1906 abort_thread(1);
1907 }
1908
1909 if (stack - 1 > stack || /* check for overflow in subtraction */
1910 (char *)stack <= (char *)NtCurrentTeb()->DeallocationStack ||
1911 (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase)
1912 {
1913 WARN( "exception outside of stack limits in thread %04x eip %08x esp %08x stack %p-%p\n",
1914 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1915 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit,
1916 NtCurrentTeb()->Tib.StackBase );
1917 }
1918 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->DeallocationStack + 4096)
1919 {
1920 /* stack overflow on last page, unrecoverable */
1921 UINT diff = (char *)NtCurrentTeb()->DeallocationStack + 4096 - (char *)(stack - 1);
1922 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1923 diff, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1924 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1925 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1926 abort_thread(1);
1927 }
1928 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit)
1929 {
1930 /* stack access below stack limit, may be recoverable */
1931 if (virtual_handle_stack_fault( stack - 1 )) exception_code = EXCEPTION_STACK_OVERFLOW;
1932 else
1933 {
1934 UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)(stack - 1);
1935 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1936 diff, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1937 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1938 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1939 abort_thread(1);
1940 }
1941 }
1942
1943 stack--; /* push the stack_layout structure */
1944 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
1945 VALGRIND_MAKE_MEM_UNDEFINED(stack, sizeof(*stack));
1946 #elif defined(VALGRIND_MAKE_WRITABLE)
1947 VALGRIND_MAKE_WRITABLE(stack, sizeof(*stack));
1948 #endif
1949 stack->ret_addr = (void *)0xdeadbabe; /* raise_func must not return */
1950 stack->rec_ptr = &stack->rec;
1951 stack->context_ptr = &stack->context;
1952
1953 stack->rec.ExceptionRecord = NULL;
1954 stack->rec.ExceptionCode = exception_code;
1955 stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
1956 stack->rec.ExceptionAddress = (LPVOID)EIP_sig(sigcontext);
1957 stack->rec.NumberParameters = 0;
1958
1959 save_context( &stack->context, sigcontext, fs, gs );
1960
1961 /* now modify the sigcontext to return to the raise function */
1962 ESP_sig(sigcontext) = (DWORD)stack;
1963 EIP_sig(sigcontext) = (DWORD)func;
1964 /* clear single-step, direction, and align check flag */
1965 EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000);
1966 CS_sig(sigcontext) = wine_get_cs();
1967 DS_sig(sigcontext) = wine_get_ds();
1968 ES_sig(sigcontext) = wine_get_es();
1969 FS_sig(sigcontext) = wine_get_fs();
1970 GS_sig(sigcontext) = wine_get_gs();
1971 SS_sig(sigcontext) = wine_get_ss();
1972
1973 return stack->rec_ptr;
1974 }
1975
1976
1977 /***********************************************************************
1978 * setup_exception
1979 *
1980 * Setup a proper stack frame for the raise function, and modify the
1981 * sigcontext so that the return from the signal handler will call
1982 * the raise function.
1983 */
1984 static EXCEPTION_RECORD *setup_exception( ucontext_t *sigcontext, raise_func func )
1985 {
1986 WORD fs, gs;
1987 void *stack = init_handler( sigcontext, &fs, &gs );
1988
1989 return setup_exception_record( sigcontext, stack, fs, gs, func );
1990 }
1991
1992
1993 /***********************************************************************
1994 * get_exception_context
1995 *
1996 * Get a pointer to the context built by setup_exception.
1997 */
1998 static inline CONTEXT *get_exception_context( EXCEPTION_RECORD *rec )
1999 {
2000 return (CONTEXT *)rec - 1; /* cf. stack_layout structure */
2001 }
2002
2003
2004 /**********************************************************************
2005 * get_fpu_code
2006 *
2007 * Get the FPU exception code from the FPU status.
2008 */
2009 static inline DWORD get_fpu_code( const CONTEXT *context )
2010 {
2011 DWORD status = context->FloatSave.StatusWord & ~(context->FloatSave.ControlWord & 0x3f);
2012
2013 if (status & 0x01) /* IE */
2014 {
2015 if (status & 0x40) /* SF */
2016 return EXCEPTION_FLT_STACK_CHECK;
2017 else
2018 return EXCEPTION_FLT_INVALID_OPERATION;
2019 }
2020 if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
2021 if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
2022 if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
2023 if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
2024 if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
2025 return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
2026 }
2027
2028
2029 /**********************************************************************
2030 * raise_segv_exception
2031 */
2032 static void WINAPI raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2033 {
2034 NTSTATUS status;
2035
2036 switch(rec->ExceptionCode)
2037 {
2038 case EXCEPTION_ACCESS_VIOLATION:
2039 if (rec->NumberParameters == 2)
2040 {
2041 if (rec->ExceptionInformation[1] == 0xffffffff && check_invalid_gs( context ))
2042 goto done;
2043 if (!(rec->ExceptionCode = virtual_handle_fault( (void *)rec->ExceptionInformation[1],
2044 rec->ExceptionInformation[0], FALSE )))
2045 goto done;
2046 if (rec->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
2047 rec->ExceptionInformation[0] == EXCEPTION_EXECUTE_FAULT)
2048 {
2049 ULONG flags;
2050 NtQueryInformationProcess( GetCurrentProcess(), ProcessExecuteFlags,
2051 &flags, sizeof(flags), NULL );
2052
2053 if (!(flags & MEM_EXECUTE_OPTION_DISABLE_THUNK_EMULATION) && check_atl_thunk( rec, context ))
2054 goto done;
2055
2056 /* send EXCEPTION_EXECUTE_FAULT only if data execution prevention is enabled */
2057 if (!(flags & MEM_EXECUTE_OPTION_DISABLE))
2058 rec->ExceptionInformation[0] = EXCEPTION_READ_FAULT;
2059 }
2060 }
2061 break;
2062 case EXCEPTION_DATATYPE_MISALIGNMENT:
2063 /* FIXME: pass through exception handler first? */
2064 if (context->EFlags & 0x00040000)
2065 {
2066 /* Disable AC flag, return */
2067 context->EFlags &= ~0x00040000;
2068 goto done;
2069 }
2070 break;
2071 case EXCEPTION_BREAKPOINT:
2072 if (!is_wow64)
2073 {
2074 /* On Wow64, the upper DWORD of Rax contains garbage, and the debug
2075 * service is usually not recognized when called from usermode. */
2076 switch (rec->ExceptionInformation[0])
2077 {
2078 case 1: /* BREAKPOINT_PRINT */
2079 case 3: /* BREAKPOINT_LOAD_SYMBOLS */
2080 case 4: /* BREAKPOINT_UNLOAD_SYMBOLS */
2081 case 5: /* BREAKPOINT_COMMAND_STRING (>= Win2003) */
2082 goto done;
2083 }
2084 }
2085 break;
2086 }
2087 status = NtRaiseException( rec, context, TRUE );
2088 raise_status( status, rec );
2089 done:
2090 set_cpu_context( context );
2091 }
2092
2093
2094 /**********************************************************************
2095 * raise_trap_exception
2096 */
2097 static void WINAPI raise_trap_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2098 {
2099 NTSTATUS status;
2100
2101 if (rec->ExceptionCode == EXCEPTION_SINGLE_STEP)
2102 {
2103 /* when single stepping can't tell whether this is a hw bp or a
2104 * single step interrupt. try to avoid as much overhead as possible
2105 * and only do a server call if there is any hw bp enabled. */
2106
2107 if( !(context->EFlags & 0x100) || (x86_thread_data()->dr7 & 0xff) )
2108 {
2109 /* (possible) hardware breakpoint, fetch the debug registers */
2110 DWORD saved_flags = context->ContextFlags;
2111 context->ContextFlags = CONTEXT_DEBUG_REGISTERS;
2112 NtGetContextThread(GetCurrentThread(), context);
2113 context->ContextFlags |= saved_flags; /* restore flags */
2114 }
2115
2116 context->EFlags &= ~0x100; /* clear single-step flag */
2117 }
2118
2119 status = NtRaiseException( rec, context, TRUE );
2120 raise_status( status, rec );
2121 }
2122
2123
2124 /**********************************************************************
2125 * raise_generic_exception
2126 *
2127 * Generic raise function for exceptions that don't need special treatment.
2128 */
2129 static void WINAPI raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2130 {
2131 NTSTATUS status;
2132
2133 status = NtRaiseException( rec, context, TRUE );
2134 raise_status( status, rec );
2135 }
2136
2137
2138 #ifdef __HAVE_VM86
2139 /**********************************************************************
2140 * raise_vm86_sti_exception
2141 */
2142 static void WINAPI raise_vm86_sti_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2143 {
2144 /* merge_vm86_pending_flags merges the vm86_pending flag in safely */
2145 get_vm86_teb_info()->vm86_pending |= VIP_FLAG;
2146
2147 if (x86_thread_data()->vm86_ptr)
2148 {
2149 if (((char*)context->Eip >= (char*)vm86_return) &&
2150 ((char*)context->Eip <= (char*)vm86_return_end) &&
2151 (VM86_TYPE(context->Eax) != VM86_SIGNAL)) {
2152 /* exiting from VM86, can't throw */
2153 goto done;
2154 }
2155 merge_vm86_pending_flags( rec );
2156 }
2157 else if (get_vm86_teb_info()->dpmi_vif &&
2158 !wine_ldt_is_system(context->SegCs) &&
2159 !wine_ldt_is_system(context->SegSs))
2160 {
2161 /* Executing DPMI code and virtual interrupts are enabled. */
2162 get_vm86_teb_info()->vm86_pending = 0;
2163 NtRaiseException( rec, context, TRUE );
2164 }
2165 done:
2166 set_cpu_context( context );
2167 }
2168
2169
2170 /**********************************************************************
2171 * usr2_handler
2172 *
2173 * Handler for SIGUSR2.
2174 * We use it to signal that the running __wine_enter_vm86() should
2175 * immediately set VIP_FLAG, causing pending events to be handled
2176 * as early as possible.
2177 */
2178 static void usr2_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2179 {
2180 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_vm86_sti_exception );
2181 rec->ExceptionCode = EXCEPTION_VM86_STI;
2182 }
2183 #endif /* __HAVE_VM86 */
2184
2185
2186 /**********************************************************************
2187 * segv_handler
2188 *
2189 * Handler for SIGSEGV and related errors.
2190 */
2191 static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2192 {
2193 WORD fs, gs;
2194 EXCEPTION_RECORD *rec;
2195 ucontext_t *context = sigcontext;
2196 void *stack = init_handler( sigcontext, &fs, &gs );
2197
2198 /* check for exceptions on the signal stack caused by write watches */
2199 if (get_trap_code(context) == TRAP_x86_PAGEFLT &&
2200 (char *)stack >= (char *)get_signal_stack() &&
2201 (char *)stack < (char *)get_signal_stack() + signal_stack_size &&
2202 !virtual_handle_fault( siginfo->si_addr, (get_error_code(context) >> 1) & 0x09, TRUE ))
2203 {
2204 return;
2205 }
2206
2207 /* check for page fault inside the thread stack */
2208 if (get_trap_code(context) == TRAP_x86_PAGEFLT &&
2209 (char *)siginfo->si_addr >= (char *)NtCurrentTeb()->DeallocationStack &&
2210 (char *)siginfo->si_addr < (char *)NtCurrentTeb()->Tib.StackBase &&
2211 virtual_handle_stack_fault( siginfo->si_addr ))
2212 {
2213 /* check if this was the last guard page */
2214 if ((char *)siginfo->si_addr < (char *)NtCurrentTeb()->DeallocationStack + 2*4096)
2215 {
2216 rec = setup_exception_record( context, stack, fs, gs, raise_segv_exception );
2217 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
2218 }
2219 return;
2220 }
2221
2222 rec = setup_exception_record( context, stack, fs, gs, raise_segv_exception );
2223 if (rec->ExceptionCode == EXCEPTION_STACK_OVERFLOW) return;
2224
2225 switch(get_trap_code(context))
2226 {
2227 case TRAP_x86_OFLOW: /* Overflow exception */
2228 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
2229 break;
2230 case TRAP_x86_BOUND: /* Bound range exception */
2231 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
2232 break;
2233 case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
2234 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2235 break;
2236 case TRAP_x86_STKFLT: /* Stack fault */
2237 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
2238 break;
2239 case TRAP_x86_SEGNPFLT: /* Segment not present exception */
2240 case TRAP_x86_PROTFLT: /* General protection fault */
2241 case TRAP_x86_UNKNOWN: /* Unknown fault code */
2242 {
2243 CONTEXT *win_context = get_exception_context( rec );
2244 WORD err = get_error_code(context);
2245 if (!err && (rec->ExceptionCode = is_privileged_instr( win_context ))) break;
2246 if ((err & 7) == 2 && handle_interrupt( err >> 3, rec, win_context )) break;
2247 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2248 rec->NumberParameters = 2;
2249 rec->ExceptionInformation[0] = 0;
2250 /* if error contains a LDT selector, use that as fault address */
2251 if ((err & 7) == 4 && !wine_ldt_is_system( err | 7 ))
2252 rec->ExceptionInformation[1] = err & ~7;
2253 else
2254 rec->ExceptionInformation[1] = 0xffffffff;
2255 }
2256 break;
2257 case TRAP_x86_PAGEFLT: /* Page fault */
2258 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2259 rec->NumberParameters = 2;
2260 rec->ExceptionInformation[0] = (get_error_code(context) >> 1) & 0x09;
2261 rec->ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
2262 break;
2263 case TRAP_x86_ALIGNFLT: /* Alignment check exception */
2264 rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
2265 break;
2266 default:
2267 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) );
2268 /* fall through */
2269 case TRAP_x86_NMI: /* NMI interrupt */
2270 case TRAP_x86_DNA: /* Device not available exception */
2271 case TRAP_x86_DOUBLEFLT: /* Double fault exception */
2272 case TRAP_x86_TSSFLT: /* Invalid TSS exception */
2273 case TRAP_x86_MCHK: /* Machine check exception */
2274 case TRAP_x86_CACHEFLT: /* Cache flush exception */
2275 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2276 break;
2277 }
2278 }
2279
2280
2281 /**********************************************************************
2282 * trap_handler
2283 *
2284 * Handler for SIGTRAP.
2285 */
2286 static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2287 {
2288 ucontext_t *context = sigcontext;
2289 EXCEPTION_RECORD *rec = setup_exception( context, raise_trap_exception );
2290
2291 switch(get_trap_code(context))
2292 {
2293 case TRAP_x86_TRCTRAP: /* Single-step exception */
2294 rec->ExceptionCode = EXCEPTION_SINGLE_STEP;
2295 break;
2296 case TRAP_x86_BPTFLT: /* Breakpoint exception */
2297 rec->ExceptionAddress = (char *)rec->ExceptionAddress - 1; /* back up over the int3 instruction */
2298 /* fall through */
2299 default:
2300 rec->ExceptionCode = EXCEPTION_BREAKPOINT;
2301 rec->NumberParameters = is_wow64 ? 1 : 3;
2302 rec->ExceptionInformation[0] = 0;
2303 rec->ExceptionInformation[1] = 0; /* FIXME */
2304 rec->ExceptionInformation[2] = 0; /* FIXME */
2305 break;
2306 }
2307 }
2308
2309
2310 /**********************************************************************
2311 * fpe_handler
2312 *
2313 * Handler for SIGFPE.
2314 */
2315 static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2316 {
2317 CONTEXT *win_context;
2318 ucontext_t *context = sigcontext;
2319 EXCEPTION_RECORD *rec = setup_exception( context, raise_generic_exception );
2320
2321 win_context = get_exception_context( rec );
2322
2323 switch(get_trap_code(context))
2324 {
2325 case TRAP_x86_DIVIDE: /* Division by zero exception */
2326 rec->ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
2327 break;
2328 case TRAP_x86_FPOPFLT: /* Coprocessor segment overrun */
2329 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2330 break;
2331 case TRAP_x86_ARITHTRAP: /* Floating point exception */
2332 case TRAP_x86_UNKNOWN: /* Unknown fault code */
2333 rec->ExceptionCode = get_fpu_code( win_context );
2334 rec->ExceptionAddress = (LPVOID)win_context->FloatSave.ErrorOffset;
2335 break;
2336 case TRAP_x86_CACHEFLT: /* SIMD exception */
2337 /* TODO:
2338 * Behaviour only tested for divide-by-zero exceptions
2339 * Check for other SIMD exceptions as well */
2340 if(siginfo->si_code != FPE_FLTDIV && siginfo->si_code != FPE_FLTINV)
2341 FIXME("untested SIMD exception: %#x. Might not work correctly\n",
2342 siginfo->si_code);
2343
2344 rec->ExceptionCode = STATUS_FLOAT_MULTIPLE_TRAPS;
2345 rec->NumberParameters = 1;
2346 /* no idea what meaning is actually behind this but that's what native does */
2347 rec->ExceptionInformation[0] = 0;
2348 break;
2349 default:
2350 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) );
2351 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2352 break;
2353 }
2354 }
2355
2356
2357 /**********************************************************************
2358 * int_handler
2359 *
2360 * Handler for SIGINT.
2361 *
2362 * FIXME: should not be calling external functions on the signal stack.
2363 */
2364 static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2365 {
2366 WORD fs, gs;
2367 init_handler( sigcontext, &fs, &gs );
2368 if (!dispatch_signal(SIGINT))
2369 {
2370 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2371 rec->ExceptionCode = CONTROL_C_EXIT;
2372 }
2373 }
2374
2375 /**********************************************************************
2376 * abrt_handler
2377 *
2378 * Handler for SIGABRT.
2379 */
2380 static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2381 {
2382 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2383 rec->ExceptionCode = EXCEPTION_WINE_ASSERTION;
2384 rec->ExceptionFlags = EH_NONCONTINUABLE;
2385 }
2386
2387
2388 /**********************************************************************
2389 * quit_handler
2390 *
2391 * Handler for SIGQUIT.
2392 */
2393 static void quit_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2394 {
2395 WORD fs, gs;
2396 init_handler( sigcontext, &fs, &gs );
2397 abort_thread(0);
2398 }
2399
2400
2401 /**********************************************************************
2402 * usr1_handler
2403 *
2404 * Handler for SIGUSR1, used to signal a thread that it got suspended.
2405 */
2406 static void usr1_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2407 {
2408 CONTEXT context;
2409 WORD fs, gs;
2410
2411 init_handler( sigcontext, &fs, &gs );
2412 save_context( &context, sigcontext, fs, gs );
2413 wait_suspend( &context );
2414 restore_context( &context, sigcontext );
2415 }
2416
2417
2418 /***********************************************************************
2419 * __wine_set_signal_handler (NTDLL.@)
2420 */
2421 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
2422 {
2423 if (sig >= sizeof(handlers) / sizeof(handlers[0])) return -1;
2424 if (handlers[sig] != NULL) return -2;
2425 handlers[sig] = wsh;
2426 return 0;
2427 }
2428
2429
2430 /***********************************************************************
2431 * locking for LDT routines
2432 */
2433 static RTL_CRITICAL_SECTION ldt_section;
2434 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
2435 {
2436 0, 0, &ldt_section,
2437 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
2438 0, 0, { (DWORD_PTR)(__FILE__ ": ldt_section") }
2439 };
2440 static RTL_CRITICAL_SECTION ldt_section = { &critsect_debug, -1, 0, 0, 0, 0 };
2441 static sigset_t ldt_sigset;
2442
2443 static void ldt_lock(void)
2444 {
2445 sigset_t sigset;
2446
2447 pthread_sigmask( SIG_BLOCK, &server_block_set, &sigset );
2448 RtlEnterCriticalSection( &ldt_section );
2449 if (ldt_section.RecursionCount == 1) ldt_sigset = sigset;
2450 }
2451
2452 static void ldt_unlock(void)
2453 {
2454 if (ldt_section.RecursionCount == 1)
2455 {
2456 sigset_t sigset = ldt_sigset;
2457 RtlLeaveCriticalSection( &ldt_section );
2458 pthread_sigmask( SIG_SETMASK, &sigset, NULL );
2459 }
2460 else RtlLeaveCriticalSection( &ldt_section );
2461 }
2462
2463
2464 /**********************************************************************
2465 * signal_alloc_thread
2466 */
2467 NTSTATUS signal_alloc_thread( TEB **teb )
2468 {
2469 static size_t sigstack_zero_bits;
2470 struct x86_thread_data *thread_data;
2471 SIZE_T size;
2472 void *addr = NULL;
2473 NTSTATUS status;
2474
2475 if (!sigstack_zero_bits)
2476 {
2477 size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 );
2478 /* find the first power of two not smaller than min_size */
2479 sigstack_zero_bits = 12;
2480 while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
2481 signal_stack_mask = (1 << sigstack_zero_bits) - 1;
2482 signal_stack_size = (1 << sigstack_zero_bits) - teb_size;
2483 }
2484
2485 size = signal_stack_mask + 1;
2486 if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), &addr, sigstack_zero_bits,
2487 &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
2488 {
2489 *teb = addr;
2490 (*teb)->Tib.Self = &(*teb)->Tib;
2491 (*teb)->Tib.ExceptionList = (void *)~0UL;
2492 thread_data = (struct x86_thread_data *)(*teb)->SystemReserved2;
2493 if (!(thread_data->fs = wine_ldt_alloc_fs()))
2494 {
2495 size = 0;
2496 NtFreeVirtualMemory( NtCurrentProcess(), &addr, &size, MEM_RELEASE );
2497 status = STATUS_TOO_MANY_THREADS;
2498 }
2499 }
2500 return status;
2501 }
2502
2503
2504 /**********************************************************************
2505 * signal_free_thread
2506 */
2507 void signal_free_thread( TEB *teb )
2508 {
2509 SIZE_T size = 0;
2510 struct x86_thread_data *thread_data = (struct x86_thread_data *)teb->SystemReserved2;
2511
2512 wine_ldt_free_fs( thread_data->fs );
2513 NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
2514 }
2515
2516
2517 /**********************************************************************
2518 * signal_init_thread
2519 */
2520 void signal_init_thread( TEB *teb )
2521 {
2522 const WORD fpu_cw = 0x27f;
2523 struct x86_thread_data *thread_data = (struct x86_thread_data *)teb->SystemReserved2;
2524 LDT_ENTRY fs_entry;
2525 stack_t ss;
2526
2527 #ifdef __APPLE__
2528 int mib[2], val = 1;
2529
2530 mib[0] = CTL_KERN;
2531 mib[1] = KERN_THALTSTACK;
2532 sysctl( mib, 2, NULL, NULL, &val, sizeof(val) );
2533 #endif
2534
2535 ss.ss_sp = (char *)teb + teb_size;
2536 ss.ss_size = signal_stack_size;
2537 ss.ss_flags = 0;
2538 if (sigaltstack(&ss, NULL) == -1) perror( "sigaltstack" );
2539
2540 wine_ldt_set_base( &fs_entry, teb );
2541 wine_ldt_set_limit( &fs_entry, teb_size - 1 );
2542 wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
2543 wine_ldt_init_fs( thread_data->fs, &fs_entry );
2544 thread_data->gs = wine_get_gs();
2545
2546 #ifdef __GNUC__
2547 __asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw));
2548 #else
2549 FIXME("FPU setup not implemented for this platform.\n");
2550 #endif
2551 }
2552
2553 /**********************************************************************
2554 * signal_init_process
2555 */
2556 void signal_init_process(void)
2557 {
2558 struct sigaction sig_act;
2559
2560 sig_act.sa_mask = server_block_set;
2561 sig_act.sa_flags = SA_SIGINFO | SA_RESTART;
2562 #ifdef SA_ONSTACK
2563 sig_act.sa_flags |= SA_ONSTACK;
2564 #endif
2565 #ifdef __ANDROID__
2566 sig_act.sa_flags |= SA_RESTORER;
2567 sig_act.sa_restorer = rt_sigreturn;
2568 #endif
2569 sig_act.sa_sigaction = int_handler;
2570 if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
2571 sig_act.sa_sigaction = fpe_handler;
2572 if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
2573 sig_act.sa_sigaction = abrt_handler;
2574 if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
2575 sig_act.sa_sigaction = quit_handler;
2576 if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
2577 sig_act.sa_sigaction = usr1_handler;
2578 if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
2579
2580 sig_act.sa_sigaction = segv_handler;
2581 if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
2582 if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
2583 #ifdef SIGBUS
2584 if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
2585 #endif
2586
2587 #ifdef SIGTRAP
2588 sig_act.sa_sigaction = trap_handler;
2589 if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
2590 #endif
2591
2592 #ifdef __HAVE_VM86
2593 sig_act.sa_sigaction = usr2_handler;
2594 if (sigaction( SIGUSR2, &sig_act, NULL ) == -1) goto error;
2595 #endif
2596
2597 wine_ldt_init_locking( ldt_lock, ldt_unlock );
2598 return;
2599
2600 error:
2601 perror("sigaction");
2602 exit(1);
2603 }
2604
2605
2606
2607 #ifdef __HAVE_VM86
2608 /**********************************************************************
2609 * __wine_enter_vm86 (NTDLL.@)
2610 *
2611 * Enter vm86 mode with the specified register context.
2612 */
2613 void __wine_enter_vm86( CONTEXT *context )
2614 {
2615 EXCEPTION_RECORD rec;
2616 int res;
2617 struct vm86plus_struct vm86;
2618
2619 memset( &vm86, 0, sizeof(vm86) );
2620 for (;;)
2621 {
2622 restore_vm86_context( context, &vm86 );
2623
2624 x86_thread_data()->vm86_ptr = &vm86;
2625 merge_vm86_pending_flags( &rec );
2626
2627 res = vm86_enter( &x86_thread_data()->vm86_ptr ); /* uses and clears teb->vm86_ptr */
2628 if (res < 0)
2629 {
2630 errno = -res;
2631 return;
2632 }
2633
2634 save_vm86_context( context, &vm86 );
2635
2636 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
2637 rec.ExceptionRecord = NULL;
2638 rec.ExceptionAddress = (LPVOID)context->Eip;
2639 rec.NumberParameters = 0;
2640
2641 switch(VM86_TYPE(res))
2642 {
2643 case VM86_UNKNOWN: /* unhandled GP fault - IO-instruction or similar */
2644 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
2645 break;
2646 case VM86_TRAP: /* return due to DOS-debugger request */
2647 switch(VM86_ARG(res))
2648 {
2649 case TRAP_x86_TRCTRAP: /* Single-step exception */
2650 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
2651 break;
2652 case TRAP_x86_BPTFLT: /* Breakpoint exception */
2653 rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */
2654 /* fall through */
2655 default:
2656 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
2657 break;
2658 }
2659 break;
2660 case VM86_INTx: /* int3/int x instruction (ARG = x) */
2661 rec.ExceptionCode = EXCEPTION_VM86_INTx;
2662 rec.NumberParameters = 1;
2663 rec.ExceptionInformation[0] = VM86_ARG(res);
2664 break;
2665 case VM86_STI: /* sti/popf/iret instruction enabled virtual interrupts */
2666 context->EFlags |= VIF_FLAG;
2667 context->EFlags &= ~VIP_FLAG;
2668 get_vm86_teb_info()->vm86_pending = 0;
2669 rec.ExceptionCode = EXCEPTION_VM86_STI;
2670 break;
2671 case VM86_PICRETURN: /* return due to pending PIC request */
2672 rec.ExceptionCode = EXCEPTION_VM86_PICRETURN;
2673 break;
2674 case VM86_SIGNAL: /* cannot happen because vm86_enter handles this case */
2675 default:
2676 WINE_ERR( "unhandled result from vm86 mode %x\n", res );
2677 continue;
2678 }
2679 raise_exception( &rec, context, TRUE );
2680 }
2681 }
2682
2683 #else /* __HAVE_VM86 */
2684 /**********************************************************************
2685 * __wine_enter_vm86 (NTDLL.@)
2686 */
2687 void __wine_enter_vm86( CONTEXT *context )
2688 {
2689 MESSAGE("vm86 mode not supported on this platform\n");
2690 }
2691 #endif /* __HAVE_VM86 */
2692
2693
2694 /*******************************************************************
2695 * RtlUnwind (NTDLL.@)
2696 */
2697 void WINAPI DECLSPEC_HIDDEN __regs_RtlUnwind( EXCEPTION_REGISTRATION_RECORD* pEndFrame, PVOID targetIp,
2698 PEXCEPTION_RECORD pRecord, PVOID retval, CONTEXT *context )
2699 {
2700 EXCEPTION_RECORD record;
2701 EXCEPTION_REGISTRATION_RECORD *frame, *dispatch;
2702 DWORD res;
2703
2704 context->Eax = (DWORD)retval;
2705
2706 /* build an exception record, if we do not have one */
2707 if (!pRecord)
2708 {
2709 record.ExceptionCode = STATUS_UNWIND;
2710 record.ExceptionFlags = 0;
2711 record.ExceptionRecord = NULL;
2712 record.ExceptionAddress = (void *)context->Eip;
2713 record.NumberParameters = 0;
2714 pRecord = &record;
2715 }
2716
2717 pRecord->ExceptionFlags |= EH_UNWINDING | (pEndFrame ? 0 : EH_EXIT_UNWIND);
2718
2719 TRACE( "code=%x flags=%x\n", pRecord->ExceptionCode, pRecord->ExceptionFlags );
2720 TRACE( "eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n",
2721 context->Eax, context->Ebx, context->Ecx, context->Edx, context->Esi, context->Edi );
2722 TRACE( "ebp=%08x esp=%08x eip=%08x cs=%04x ds=%04x fs=%04x gs=%04x flags=%08x\n",
2723 context->Ebp, context->Esp, context->Eip, LOWORD(context->SegCs), LOWORD(context->SegDs),
2724 LOWORD(context->SegFs), LOWORD(context->SegGs), context->EFlags );
2725
2726 /* get chain of exception frames */
2727 frame = NtCurrentTeb()->Tib.ExceptionList;
2728 while ((frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL) && (frame != pEndFrame))
2729 {
2730 /* Check frame address */
2731 if (pEndFrame && (frame > pEndFrame))
2732 raise_status( STATUS_INVALID_UNWIND_TARGET, pRecord );
2733
2734 if (!is_valid_frame( frame )) raise_status( STATUS_BAD_STACK, pRecord );
2735
2736 /* Call handler */
2737 TRACE( "calling handler at %p code=%x flags=%x\n",
2738 frame->Handler, pRecord->ExceptionCode, pRecord->ExceptionFlags );
2739 res = EXC_CallHandler( pRecord, frame, context, &dispatch, frame->Handler, unwind_handler );
2740 TRACE( "handler at %p returned %x\n", frame->Handler, res );
2741
2742 switch(res)
2743 {
2744 case ExceptionContinueSearch:
2745 break;
2746 case ExceptionCollidedUnwind:
2747 frame = dispatch;
2748 break;
2749 default:
2750 raise_status( STATUS_INVALID_DISPOSITION, pRecord );
2751 break;
2752 }
2753 frame = __wine_pop_frame( frame );
2754 }
2755
2756 NtSetContextThread( GetCurrentThread(), context );
2757 }
2758 __ASM_STDCALL_FUNC( RtlUnwind, 16,
2759 "pushl %ebp\n\t"
2760 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2761 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2762 "movl %esp,%ebp\n\t"
2763 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2764 "leal -(0x2cc+8)(%esp),%esp\n\t" /* sizeof(CONTEXT) + alignment */
2765 "pushl %esp\n\t" /* context */
2766 "call " __ASM_NAME("RtlCaptureContext") __ASM_STDCALL(4) "\n\t"
2767 "leal 24(%ebp),%eax\n\t"
2768 "movl %eax,0xc4(%esp)\n\t" /* context->Esp */
2769 "pushl %esp\n\t"
2770 "pushl 20(%ebp)\n\t"
2771 "pushl 16(%ebp)\n\t"
2772 "pushl 12(%ebp)\n\t"
2773 "pushl 8(%ebp)\n\t"
2774 "call " __ASM_NAME("__regs_RtlUnwind") __ASM_STDCALL(20) "\n\t"
2775 "leave\n\t"
2776 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2777 __ASM_CFI(".cfi_same_value %ebp\n\t")
2778 "ret $16" ) /* actually never returns */
2779
2780
2781 /*******************************************************************
2782 * NtRaiseException (NTDLL.@)
2783 */
2784 NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
2785 {
2786 NTSTATUS status = raise_exception( rec, context, first_chance );
2787 if (status == STATUS_SUCCESS) NtSetContextThread( GetCurrentThread(), context );
2788 return status;
2789 }
2790
2791
2792 /***********************************************************************
2793 * RtlRaiseException (NTDLL.@)
2794 */
2795 __ASM_STDCALL_FUNC( RtlRaiseException, 4,
2796 "pushl %ebp\n\t"
2797 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2798 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2799 "movl %esp,%ebp\n\t"
2800 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2801 "leal -0x2cc(%esp),%esp\n\t" /* sizeof(CONTEXT) */
2802 "pushl %esp\n\t" /* context */
2803 "call " __ASM_NAME("RtlCaptureContext") __ASM_STDCALL(4) "\n\t"
2804 "movl 4(%ebp),%eax\n\t" /* return address */
2805 "movl 8(%ebp),%ecx\n\t" /* rec */
2806 "movl %eax,12(%ecx)\n\t" /* rec->ExceptionAddress */
2807 "leal 12(%ebp),%eax\n\t"
2808 "movl %eax,0xc4(%esp)\n\t" /* context->Esp */
2809 "movl %esp,%eax\n\t"
2810 "pushl $1\n\t"
2811 "pushl %eax\n\t"
2812 "pushl %ecx\n\t"
2813 "call " __ASM_NAME("NtRaiseException") __ASM_STDCALL(12) "\n\t"
2814 "pushl %eax\n\t"
2815 "call " __ASM_NAME("RtlRaiseStatus") __ASM_STDCALL(4) "\n\t"
2816 "leave\n\t"
2817 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2818 __ASM_CFI(".cfi_same_value %ebp\n\t")
2819 "ret $4" ) /* actually never returns */
2820
2821
2822 /*************************************************************************
2823 * RtlCaptureStackBackTrace (NTDLL.@)
2824 */
2825 USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
2826 {
2827 CONTEXT context;
2828 ULONG i;
2829 ULONG *frame;
2830
2831 RtlCaptureContext( &context );
2832 if (hash) *hash = 0;
2833 frame = (ULONG *)context.Ebp;
2834
2835 while (skip--)
2836 {
2837 if (!is_valid_frame( frame )) return 0;
2838 frame = (ULONG *)*frame;
2839 }
2840
2841 for (i = 0; i < count; i++)
2842 {
2843 if (!is_valid_frame( frame )) break;
2844 buffer[i] = (void *)frame[1];
2845 if (hash) *hash += frame[1];
2846 frame = (ULONG *)*frame;
2847 }
2848 return i;
2849 }
2850
2851
2852 extern void DECLSPEC_NORETURN start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend,
2853 void *relay );
2854 __ASM_GLOBAL_FUNC( start_thread,
2855 "pushl %ebp\n\t"
2856 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2857 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2858 "movl %esp,%ebp\n\t"
2859 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2860 "pushl %ebx\n\t"
2861 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2862 "pushl %esi\n\t"
2863 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
2864 "pushl %edi\n\t"
2865 __ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
2866 /* store exit frame */
2867 "movl %ebp,%fs:0x1f4\n\t" /* x86_thread_data()->exit_frame */
2868 /* build initial context on thread stack */
2869 "movl %fs:4,%eax\n\t" /* NtCurrentTeb()->StackBase */
2870 "leal -0x2dc(%eax),%esi\n\t" /* sizeof(context) + 16 */
2871 "movl $0x10007,(%esi)\n\t" /* context->ContextFlags = CONTEXT_FULL */
2872 "movw %cs,0xbc(%esi)\n\t" /* context->SegCs */
2873 "movw %ds,0x98(%esi)\n\t" /* context->SegDs */
2874 "movw %es,0x94(%esi)\n\t" /* context->SegEs */
2875 "movw %fs,0x90(%esi)\n\t" /* context->SegFs */
2876 "movw %gs,0x8c(%esi)\n\t" /* context->SegGs */
2877 "movw %ss,0xc8(%esi)\n\t" /* context->SegSs */
2878 "movl 8(%ebp),%eax\n\t"
2879 "movl %eax,0xb0(%esi)\n\t" /* context->Eax = entry */
2880 "movl 12(%ebp),%eax\n\t"
2881 "movl %eax,0xa4(%esi)\n\t" /* context->Ebx = arg */
2882 "movl 20(%ebp),%eax\n\t"
2883 "movl %eax,0xb8(%esi)\n\t" /* context->Eip = relay */
2884 "leal 0x2cc(%esi),%eax\n\t"
2885 "movl %eax,0xc4(%esi)\n\t" /* context->Esp */
2886 /* switch to thread stack */
2887 "leal -12(%esi),%esp\n\t"
2888 /* attach dlls */
2889 "pushl 16(%ebp)\n\t" /* suspend */
2890 "pushl %esi\n\t" /* context */
2891 "xorl %ebp,%ebp\n\t"
2892 "call " __ASM_NAME("attach_dlls") "\n\t"
2893 "addl $20,%esp\n\t"
2894 /* clear the stack */
2895 "leal -0xd24(%esi),%eax\n\t" /* round down to page size */
2896 "pushl %eax\n\t"
2897 "call " __ASM_NAME("virtual_clear_thread_stack") "\n\t"
2898 /* switch to the initial context */
2899 "movl %esi,(%esp)\n\t"
2900 "movl $0x10007,(%esi)\n\t" /* context->ContextFlags = CONTEXT_FULL */
2901 "call " __ASM_NAME("set_cpu_context") )
2902
2903 extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int) );
2904 __ASM_GLOBAL_FUNC( call_thread_exit_func,
2905 /* fetch exit frame */
2906 "movl %fs:0x1f4,%edx\n\t" /* x86_thread_data()->exit_frame */
2907 "testl %edx,%edx\n\t"
2908 "jnz 1f\n\t"
2909 "jmp *%ecx\n\t"
2910 /* switch to exit frame stack */
2911 "1:\tmovl 4(%esp),%eax\n\t"
2912 "movl 8(%esp),%ecx\n\t"
2913 "movl $0,%fs:0x1f4\n\t"
2914 "movl %edx,%ebp\n\t"
2915 __ASM_CFI(".cfi_def_cfa %ebp,4\n\t")
2916 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2917 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2918 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
2919 __ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
2920 "leal -20(%ebp),%esp\n\t"
2921 "pushl %eax\n\t"
2922 "call *%ecx" )
2923
2924 extern void call_thread_entry(void) DECLSPEC_HIDDEN;
2925 __ASM_GLOBAL_FUNC( call_thread_entry,
2926 "pushl %ebp\n\t"
2927 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2928 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2929 "movl %esp,%ebp\n\t"
2930 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2931 "pushl %ebx\n\t" /* arg */
2932 "pushl %eax\n\t" /* entry */
2933 "call " __ASM_NAME("call_thread_func") )
2934
2935 /* wrapper for apps that don't declare the thread function correctly */
2936 extern DWORD call_thread_func_wrapper( LPTHREAD_START_ROUTINE entry, void *arg );
2937 __ASM_GLOBAL_FUNC(call_thread_func_wrapper,
2938 "pushl %ebp\n\t"
2939 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2940 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2941 "movl %esp,%ebp\n\t"
2942 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2943 "subl $4,%esp\n\t"
2944 "pushl 12(%ebp)\n\t"
2945 "call *8(%ebp)\n\t"
2946 "leave\n\t"
2947 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2948 __ASM_CFI(".cfi_same_value %ebp\n\t")
2949 "ret" )
2950
2951 /***********************************************************************
2952 * call_thread_func
2953 */
2954 void DECLSPEC_HIDDEN call_thread_func( LPTHREAD_START_ROUTINE entry, void *arg )
2955 {
2956 __TRY
2957 {
2958 TRACE_(relay)( "\1Starting thread proc %p (arg=%p)\n", entry, arg );
2959 RtlExitUserThread( call_thread_func_wrapper( entry, arg ));
2960 }
2961 __EXCEPT(unhandled_exception_filter)
2962 {
2963 NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
2964 }
2965 __ENDTRY
2966 abort(); /* should not be reached */
2967 }
2968
2969
2970 /***********************************************************************
2971 * signal_start_thread
2972 *
2973 * Thread startup sequence:
2974 * signal_start_thread()
2975 * -> start_thread()
2976 * -> call_thread_entry()
2977 * -> call_thread_func()
2978 */
2979 void signal_start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend )
2980 {
2981 start_thread( entry, arg, suspend, call_thread_entry );
2982 }
2983
2984 /**********************************************************************
2985 * signal_start_process
2986 *
2987 * Process startup sequence:
2988 * signal_start_process()
2989 * -> start_thread()
2990 * -> kernel32_start_process()
2991 */
2992 void signal_start_process( LPTHREAD_START_ROUTINE entry, BOOL suspend )
2993 {
2994 start_thread( entry, NtCurrentTeb()->Peb, suspend, kernel32_start_process );
2995 }
2996
2997
2998 /***********************************************************************
2999 * signal_exit_thread
3000 */
3001 void signal_exit_thread( int status )
3002 {
3003 call_thread_exit_func( status, exit_thread );
3004 }
3005
3006 /***********************************************************************
3007 * signal_exit_process
3008 */
3009 void signal_exit_process( int status )
3010 {
3011 call_thread_exit_func( status, exit );
3012 }
3013
3014 /**********************************************************************
3015 * DbgBreakPoint (NTDLL.@)
3016 */
3017 __ASM_STDCALL_FUNC( DbgBreakPoint, 0, "int $3; ret")
3018
3019 /**********************************************************************
3020 * DbgUserBreakPoint (NTDLL.@)
3021 */
3022 __ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "int $3; ret")
3023
3024 /**********************************************************************
3025 * NtCurrentTeb (NTDLL.@)
3026 */
3027 __ASM_STDCALL_FUNC( NtCurrentTeb, 0, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" )
3028
3029
3030 /**************************************************************************
3031 * _chkstk (NTDLL.@)
3032 */
3033 __ASM_STDCALL_FUNC( _chkstk, 0,
3034 "negl %eax\n\t"
3035 "addl %esp,%eax\n\t"
3036 "xchgl %esp,%eax\n\t"
3037 "movl 0(%eax),%eax\n\t" /* copy return address from old location */
3038 "movl %eax,0(%esp)\n\t"
3039 "ret" )
3040
3041 /**************************************************************************
3042 * _alloca_probe (NTDLL.@)
3043 */
3044 __ASM_STDCALL_FUNC( _alloca_probe, 0,
3045 "negl %eax\n\t"
3046 "addl %esp,%eax\n\t"
3047 "xchgl %esp,%eax\n\t"
3048 "movl 0(%eax),%eax\n\t" /* copy return address from old location */
3049 "movl %eax,0(%esp)\n\t"
3050 "ret" )
3051
3052
3053 /**********************************************************************
3054 * EXC_CallHandler (internal)
3055 *
3056 * Some exception handlers depend on EBP to have a fixed position relative to
3057 * the exception frame.
3058 * Shrinker depends on (*1) doing what it does,
3059 * (*2) being the exact instruction it is and (*3) beginning with 0x64
3060 * (i.e. the %fs prefix to the movl instruction). It also depends on the
3061 * function calling the handler having only 5 parameters (*4).
3062 */
3063 __ASM_GLOBAL_FUNC( EXC_CallHandler,
3064 "pushl %ebp\n\t"
3065 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
3066 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
3067 "movl %esp,%ebp\n\t"
3068 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
3069 "pushl %ebx\n\t"
3070 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
3071 "movl 28(%ebp), %edx\n\t" /* ugly hack to pass the 6th param needed because of Shrinker */
3072 "pushl 24(%ebp)\n\t"
3073 "pushl 20(%ebp)\n\t"
3074 "pushl 16(%ebp)\n\t"
3075 "pushl 12(%ebp)\n\t"
3076 "pushl 8(%ebp)\n\t"
3077 "call " __ASM_NAME("call_exception_handler") "\n\t"
3078 "popl %ebx\n\t"
3079 __ASM_CFI(".cfi_same_value %ebx\n\t")
3080 "leave\n"
3081 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
3082 __ASM_CFI(".cfi_same_value %ebp\n\t")
3083 "ret" )
3084 __ASM_GLOBAL_FUNC(call_exception_handler,
3085 "pushl %ebp\n\t"
3086 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
3087 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
3088 "movl %esp,%ebp\n\t"
3089 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
3090 "subl $12,%esp\n\t"
3091 "pushl 12(%ebp)\n\t" /* make any exceptions in this... */
3092 "pushl %edx\n\t" /* handler be handled by... */
3093 ".byte 0x64\n\t"
3094 "pushl (0)\n\t" /* nested_handler (passed in edx). */
3095 ".byte 0x64\n\t"
3096 "movl %esp,(0)\n\t" /* push the new exception frame onto the exception stack. */
3097 "pushl 20(%ebp)\n\t"
3098 "pushl 16(%ebp)\n\t"
3099 "pushl 12(%ebp)\n\t"
3100 "pushl 8(%ebp)\n\t"
3101 "movl 24(%ebp), %ecx\n\t" /* (*1) */
3102 "call *%ecx\n\t" /* call handler. (*2) */
3103 ".byte 0x64\n\t"
3104 "movl (0), %esp\n\t" /* restore previous... (*3) */
3105 ".byte 0x64\n\t"
3106 "popl (0)\n\t" /* exception frame. */
3107 "movl %ebp, %esp\n\t" /* restore saved stack, in case it was corrupted */
3108 "popl %ebp\n\t"
3109 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
3110 __ASM_CFI(".cfi_same_value %ebp\n\t")
3111 "ret $20" ) /* (*4) */
3112
3113 #endif /* __i386__ */
Windows API implementation