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ntdll: Move the plaform-specific thread data to the SystemReserved2 TEB field.
[wine.git] / dlls / ntdll / signal_i386.c
blob2301ba4c3c8004ab5822694eaf44b421eeeabf4b
1 /*
2 * i386 signal handling routines
3 *
4 * Copyright 1999 Alexandre Julliard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #ifdef __i386__
22
23 #include "config.h"
24 #include "wine/port.h"
25
26 #include <errno.h>
27 #include <signal.h>
28 #include <stdlib.h>
29 #include <stdarg.h>
30 #include <stdio.h>
31 #include <sys/types.h>
32 #ifdef HAVE_UNISTD_H
33 # include <unistd.h>
34 #endif
35 #ifdef HAVE_SYS_PARAM_H
36 # include <sys/param.h>
37 #endif
38 #ifdef HAVE_SYSCALL_H
39 # include <syscall.h>
40 #else
41 # ifdef HAVE_SYS_SYSCALL_H
42 # include <sys/syscall.h>
43 # endif
44 #endif
45 #ifdef HAVE_SYS_VM86_H
46 # include <sys/vm86.h>
47 #endif
48 #ifdef HAVE_SYS_SIGNAL_H
49 # include <sys/signal.h>
50 #endif
51 #ifdef HAVE_SYS_SYSCTL_H
52 # include <sys/sysctl.h>
53 #endif
54 #ifdef HAVE_SYS_UCONTEXT_H
55 # include <sys/ucontext.h>
56 #endif
57
58 #include "ntstatus.h"
59 #define WIN32_NO_STATUS
60 #include "windef.h"
61 #include "wine/library.h"
62 #include "ntdll_misc.h"
63 #include "wine/exception.h"
64 #include "wine/debug.h"
65
66 #ifdef HAVE_VALGRIND_MEMCHECK_H
67 #include <valgrind/memcheck.h>
68 #endif
69
70 #undef ERR /* Solaris needs to define this */
71
72 /* not defined for x86, so copy the x86_64 definition */
73 typedef struct DECLSPEC_ALIGN(16) _M128A
74 {
75 ULONGLONG Low;
76 LONGLONG High;
77 } M128A;
78
79 typedef struct
80 {
81 WORD ControlWord;
82 WORD StatusWord;
83 BYTE TagWord;
84 BYTE Reserved1;
85 WORD ErrorOpcode;
86 DWORD ErrorOffset;
87 WORD ErrorSelector;
88 WORD Reserved2;
89 DWORD DataOffset;
90 WORD DataSelector;
91 WORD Reserved3;
92 DWORD MxCsr;
93 DWORD MxCsr_Mask;
94 M128A FloatRegisters[8];
95 M128A XmmRegisters[16];
96 BYTE Reserved4[96];
97 } XMM_SAVE_AREA32;
98
99 /***********************************************************************
100 * signal context platform-specific definitions
101 */
102
103 #ifdef __linux__
104
105 #ifndef HAVE_SYS_UCONTEXT_H
106
107 enum
108 {
109 REG_GS, REG_FS, REG_ES, REG_DS, REG_EDI, REG_ESI, REG_EBP, REG_ESP,
110 REG_EBX, REG_EDX, REG_ECX, REG_EAX, REG_TRAPNO, REG_ERR, REG_EIP,
111 REG_CS, REG_EFL, REG_UESP, REG_SS, NGREG
112 };
113
114 typedef int greg_t;
115 typedef greg_t gregset_t[NGREG];
116
117 struct _libc_fpreg
118 {
119 unsigned short significand[4];
120 unsigned short exponent;
121 };
122
123 struct _libc_fpstate
124 {
125 unsigned long cw;
126 unsigned long sw;
127 unsigned long tag;
128 unsigned long ipoff;
129 unsigned long cssel;
130 unsigned long dataoff;
131 unsigned long datasel;
132 struct _libc_fpreg _st[8];
133 unsigned long status;
134 };
135
136 typedef struct _libc_fpstate* fpregset_t;
137
138 typedef struct
139 {
140 gregset_t gregs;
141 fpregset_t fpregs;
142 unsigned long oldmask;
143 unsigned long cr2;
144 } mcontext_t;
145
146 typedef struct ucontext
147 {
148 unsigned long uc_flags;
149 struct ucontext *uc_link;
150 stack_t uc_stack;
151 mcontext_t uc_mcontext;
152 sigset_t uc_sigmask;
153 } ucontext_t;
154 #endif /* HAVE_SYS_UCONTEXT_H */
155
156 #define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX])
157 #define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX])
158 #define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX])
159 #define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX])
160 #define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI])
161 #define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI])
162 #define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP])
163 #define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP])
164
165 #define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS])
166 #define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS])
167 #define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES])
168 #define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS])
169 #define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS])
170 #define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS])
171
172 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
173 #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
174 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
175 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
176
177 #define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->uc_mcontext.fpregs))
178 #define FPUX_sig(context) (FPU_sig(context) && !((context)->uc_mcontext.fpregs->status >> 16) ? (XMM_SAVE_AREA32 *)(FPU_sig(context) + 1) : NULL)
179
180 #define VIF_FLAG 0x00080000
181 #define VIP_FLAG 0x00100000
182
183 int vm86_enter( void **vm86_ptr );
184 void vm86_return(void);
185 void vm86_return_end(void);
186 __ASM_GLOBAL_FUNC(vm86_enter,
187 "pushl %ebp\n\t"
188 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
189 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
190 "movl %esp,%ebp\n\t"
191 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
192 "pushl %ebx\n\t"
193 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
194 "movl $166,%eax\n\t" /*SYS_vm86*/
195 "movl 8(%ebp),%ecx\n\t" /* vm86_ptr */
196 "movl (%ecx),%ecx\n\t"
197 "movl $1,%ebx\n\t" /*VM86_ENTER*/
198 "pushl %ecx\n\t" /* put vm86plus_struct ptr somewhere we can find it */
199 "pushl %fs\n\t"
200 "pushl %gs\n\t"
201 "int $0x80\n"
202 ".globl " __ASM_NAME("vm86_return") "\n\t"
203 __ASM_FUNC("vm86_return") "\n"
204 __ASM_NAME("vm86_return") ":\n\t"
205 "popl %gs\n\t"
206 "popl %fs\n\t"
207 "popl %ecx\n\t"
208 "popl %ebx\n\t"
209 __ASM_CFI(".cfi_same_value %ebx\n\t")
210 "popl %ebp\n\t"
211 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
212 __ASM_CFI(".cfi_same_value %ebp\n\t")
213 "testl %eax,%eax\n\t"
214 "jl 0f\n\t"
215 "cmpb $0,%al\n\t" /* VM86_SIGNAL */
216 "je " __ASM_NAME("vm86_enter") "\n\t"
217 "0:\n\t"
218 "movl 4(%esp),%ecx\n\t" /* vm86_ptr */
219 "movl $0,(%ecx)\n\t"
220 ".globl " __ASM_NAME("vm86_return_end") "\n\t"
221 __ASM_FUNC("vm86_return_end") "\n"
222 __ASM_NAME("vm86_return_end") ":\n\t"
223 "ret" )
224
225 #ifdef HAVE_SYS_VM86_H
226 # define __HAVE_VM86
227 #endif
228
229 #ifdef __ANDROID__
230 /* custom signal restorer since we may have unmapped the one in vdso, and bionic doesn't check for that */
231 void rt_sigreturn(void);
232 __ASM_GLOBAL_FUNC( rt_sigreturn,
233 "movl $173,%eax\n\t" /* NR_rt_sigreturn */
234 "int $0x80" );
235 #endif
236
237 #elif defined (__BSDI__)
238
239 #include <machine/frame.h>
240 typedef struct trapframe ucontext_t;
241
242 #define EAX_sig(context) ((context)->tf_eax)
243 #define EBX_sig(context) ((context)->tf_ebx)
244 #define ECX_sig(context) ((context)->tf_ecx)
245 #define EDX_sig(context) ((context)->tf_edx)
246 #define ESI_sig(context) ((context)->tf_esi)
247 #define EDI_sig(context) ((context)->tf_edi)
248 #define EBP_sig(context) ((context)->tf_ebp)
249
250 #define CS_sig(context) ((context)->tf_cs)
251 #define DS_sig(context) ((context)->tf_ds)
252 #define ES_sig(context) ((context)->tf_es)
253 #define SS_sig(context) ((context)->tf_ss)
254
255 #define EFL_sig(context) ((context)->tf_eflags)
256
257 #define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
258 #define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
259
260 #define FPU_sig(context) NULL /* FIXME */
261 #define FPUX_sig(context) NULL /* FIXME */
262
263 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
264
265 #include <machine/trap.h>
266
267 #define EAX_sig(context) ((context)->uc_mcontext.mc_eax)
268 #define EBX_sig(context) ((context)->uc_mcontext.mc_ebx)
269 #define ECX_sig(context) ((context)->uc_mcontext.mc_ecx)
270 #define EDX_sig(context) ((context)->uc_mcontext.mc_edx)
271 #define ESI_sig(context) ((context)->uc_mcontext.mc_esi)
272 #define EDI_sig(context) ((context)->uc_mcontext.mc_edi)
273 #define EBP_sig(context) ((context)->uc_mcontext.mc_ebp)
274
275 #define CS_sig(context) ((context)->uc_mcontext.mc_cs)
276 #define DS_sig(context) ((context)->uc_mcontext.mc_ds)
277 #define ES_sig(context) ((context)->uc_mcontext.mc_es)
278 #define FS_sig(context) ((context)->uc_mcontext.mc_fs)
279 #define GS_sig(context) ((context)->uc_mcontext.mc_gs)
280 #define SS_sig(context) ((context)->uc_mcontext.mc_ss)
281
282 #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
283 #define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
284 #define EFL_sig(context) ((context)->uc_mcontext.mc_eflags)
285
286 #define EIP_sig(context) ((context)->uc_mcontext.mc_eip)
287 #define ESP_sig(context) ((context)->uc_mcontext.mc_esp)
288
289 #define FPU_sig(context) NULL /* FIXME */
290 #define FPUX_sig(context) NULL /* FIXME */
291
292 #elif defined (__OpenBSD__)
293
294 #define EAX_sig(context) ((context)->sc_eax)
295 #define EBX_sig(context) ((context)->sc_ebx)
296 #define ECX_sig(context) ((context)->sc_ecx)
297 #define EDX_sig(context) ((context)->sc_edx)
298 #define ESI_sig(context) ((context)->sc_esi)
299 #define EDI_sig(context) ((context)->sc_edi)
300 #define EBP_sig(context) ((context)->sc_ebp)
301
302 #define CS_sig(context) ((context)->sc_cs)
303 #define DS_sig(context) ((context)->sc_ds)
304 #define ES_sig(context) ((context)->sc_es)
305 #define FS_sig(context) ((context)->sc_fs)
306 #define GS_sig(context) ((context)->sc_gs)
307 #define SS_sig(context) ((context)->sc_ss)
308
309 #define TRAP_sig(context) ((context)->sc_trapno)
310 #define ERROR_sig(context) ((context)->sc_err)
311 #define EFL_sig(context) ((context)->sc_eflags)
312
313 #define EIP_sig(context) ((context)->sc_eip)
314 #define ESP_sig(context) ((context)->sc_esp)
315
316 #define FPU_sig(context) NULL /* FIXME */
317 #define FPUX_sig(context) NULL /* FIXME */
318
319 #define T_MCHK T_MACHK
320 #define T_XMMFLT T_XFTRAP
321
322 #elif defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
323
324 #ifdef _SCO_DS
325 #include <sys/regset.h>
326 #define gregs regs
327 #endif
328
329 #define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
330 #define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
331 #define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
332 #define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
333 #define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
334 #define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
335 #define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
336
337 #define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
338 #define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
339 #define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
340 #define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
341
342 #define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
343 #define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
344
345 #define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
346
347 #define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
348 #ifdef UESP
349 #define ESP_sig(context) ((context)->uc_mcontext.gregs[UESP])
350 #elif defined(R_ESP)
351 #define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
352 #else
353 #define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
354 #endif
355 #ifdef ERR
356 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[ERR])
357 #endif
358 #ifdef TRAPNO
359 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
360 #endif
361
362 #define FPU_sig(context) NULL /* FIXME */
363 #define FPUX_sig(context) NULL /* FIXME */
364
365 #elif defined (__APPLE__)
366
367 /* work around silly renaming of struct members in OS X 10.5 */
368 #if __DARWIN_UNIX03 && defined(_STRUCT_X86_EXCEPTION_STATE32)
369 #define EAX_sig(context) ((context)->uc_mcontext->__ss.__eax)
370 #define EBX_sig(context) ((context)->uc_mcontext->__ss.__ebx)
371 #define ECX_sig(context) ((context)->uc_mcontext->__ss.__ecx)
372 #define EDX_sig(context) ((context)->uc_mcontext->__ss.__edx)
373 #define ESI_sig(context) ((context)->uc_mcontext->__ss.__esi)
374 #define EDI_sig(context) ((context)->uc_mcontext->__ss.__edi)
375 #define EBP_sig(context) ((context)->uc_mcontext->__ss.__ebp)
376 #define CS_sig(context) ((context)->uc_mcontext->__ss.__cs)
377 #define DS_sig(context) ((context)->uc_mcontext->__ss.__ds)
378 #define ES_sig(context) ((context)->uc_mcontext->__ss.__es)
379 #define FS_sig(context) ((context)->uc_mcontext->__ss.__fs)
380 #define GS_sig(context) ((context)->uc_mcontext->__ss.__gs)
381 #define SS_sig(context) ((context)->uc_mcontext->__ss.__ss)
382 #define EFL_sig(context) ((context)->uc_mcontext->__ss.__eflags)
383 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__eip))
384 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->__ss.__esp))
385 #define TRAP_sig(context) ((context)->uc_mcontext->__es.__trapno)
386 #define ERROR_sig(context) ((context)->uc_mcontext->__es.__err)
387 #define FPU_sig(context) NULL
388 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->__fs.__fpu_fcw)
389 #else
390 #define EAX_sig(context) ((context)->uc_mcontext->ss.eax)
391 #define EBX_sig(context) ((context)->uc_mcontext->ss.ebx)
392 #define ECX_sig(context) ((context)->uc_mcontext->ss.ecx)
393 #define EDX_sig(context) ((context)->uc_mcontext->ss.edx)
394 #define ESI_sig(context) ((context)->uc_mcontext->ss.esi)
395 #define EDI_sig(context) ((context)->uc_mcontext->ss.edi)
396 #define EBP_sig(context) ((context)->uc_mcontext->ss.ebp)
397 #define CS_sig(context) ((context)->uc_mcontext->ss.cs)
398 #define DS_sig(context) ((context)->uc_mcontext->ss.ds)
399 #define ES_sig(context) ((context)->uc_mcontext->ss.es)
400 #define FS_sig(context) ((context)->uc_mcontext->ss.fs)
401 #define GS_sig(context) ((context)->uc_mcontext->ss.gs)
402 #define SS_sig(context) ((context)->uc_mcontext->ss.ss)
403 #define EFL_sig(context) ((context)->uc_mcontext->ss.eflags)
404 #define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip))
405 #define ESP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.esp))
406 #define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
407 #define ERROR_sig(context) ((context)->uc_mcontext->es.err)
408 #define FPU_sig(context) NULL
409 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&(context)->uc_mcontext->fs.fpu_fcw)
410 #endif
411
412 #elif defined(__NetBSD__)
413
414 #define EAX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EAX])
415 #define EBX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBX])
416 #define ECX_sig(context) ((context)->uc_mcontext.__gregs[_REG_ECX])
417 #define EDX_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDX])
418 #define ESI_sig(context) ((context)->uc_mcontext.__gregs[_REG_ESI])
419 #define EDI_sig(context) ((context)->uc_mcontext.__gregs[_REG_EDI])
420 #define EBP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EBP])
421 #define ESP_sig(context) _UC_MACHINE_SP(context)
422
423 #define CS_sig(context) ((context)->uc_mcontext.__gregs[_REG_CS])
424 #define DS_sig(context) ((context)->uc_mcontext.__gregs[_REG_DS])
425 #define ES_sig(context) ((context)->uc_mcontext.__gregs[_REG_ES])
426 #define SS_sig(context) ((context)->uc_mcontext.__gregs[_REG_SS])
427 #define FS_sig(context) ((context)->uc_mcontext.__gregs[_REG_FS])
428 #define GS_sig(context) ((context)->uc_mcontext.__gregs[_REG_GS])
429
430 #define EFL_sig(context) ((context)->uc_mcontext.__gregs[_REG_EFL])
431 #define EIP_sig(context) _UC_MACHINE_PC(context)
432 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
433 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
434
435 #define FPU_sig(context) NULL
436 #define FPUX_sig(context) ((XMM_SAVE_AREA32 *)&((context)->uc_mcontext.__fpregs))
437
438 #define T_MCHK T_MCA
439 #define T_XMMFLT T_XMM
440
441 #elif defined(__GNU__)
442
443 #define EAX_sig(context) ((context)->uc_mcontext.gregs[REG_EAX])
444 #define EBX_sig(context) ((context)->uc_mcontext.gregs[REG_EBX])
445 #define ECX_sig(context) ((context)->uc_mcontext.gregs[REG_ECX])
446 #define EDX_sig(context) ((context)->uc_mcontext.gregs[REG_EDX])
447 #define ESI_sig(context) ((context)->uc_mcontext.gregs[REG_ESI])
448 #define EDI_sig(context) ((context)->uc_mcontext.gregs[REG_EDI])
449 #define EBP_sig(context) ((context)->uc_mcontext.gregs[REG_EBP])
450 #define ESP_sig(context) ((context)->uc_mcontext.gregs[REG_ESP])
451
452 #define CS_sig(context) ((context)->uc_mcontext.gregs[REG_CS])
453 #define DS_sig(context) ((context)->uc_mcontext.gregs[REG_DS])
454 #define ES_sig(context) ((context)->uc_mcontext.gregs[REG_ES])
455 #define SS_sig(context) ((context)->uc_mcontext.gregs[REG_SS])
456 #define FS_sig(context) ((context)->uc_mcontext.gregs[REG_FS])
457 #define GS_sig(context) ((context)->uc_mcontext.gregs[REG_GS])
458
459 #define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
460 #define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
461 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
462 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
463
464 #define FPU_sig(context) ((FLOATING_SAVE_AREA *)&(context)->uc_mcontext.fpregs.fp_reg_set.fpchip_state)
465 #define FPUX_sig(context) NULL
466
467 #else
468 #error You must define the signal context functions for your platform
469 #endif /* linux */
470
471 WINE_DEFAULT_DEBUG_CHANNEL(seh);
472
473 typedef int (*wine_signal_handler)(unsigned int sig);
474
475 static const size_t teb_size = 4096; /* we reserve one page for the TEB */
476 static size_t signal_stack_mask;
477 static size_t signal_stack_size;
478
479 static wine_signal_handler handlers[256];
480
481 static BOOL fpux_support; /* whether the CPU supports extended fpu context */
482
483 extern void DECLSPEC_NORETURN __wine_restore_regs( const CONTEXT *context );
484
485 enum i386_trap_code
486 {
487 TRAP_x86_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
488 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
489 TRAP_x86_DIVIDE = T_DIVIDE, /* Division by zero exception */
490 TRAP_x86_TRCTRAP = T_TRCTRAP, /* Single-step exception */
491 TRAP_x86_NMI = T_NMI, /* NMI interrupt */
492 TRAP_x86_BPTFLT = T_BPTFLT, /* Breakpoint exception */
493 TRAP_x86_OFLOW = T_OFLOW, /* Overflow exception */
494 TRAP_x86_BOUND = T_BOUND, /* Bound range exception */
495 TRAP_x86_PRIVINFLT = T_PRIVINFLT, /* Invalid opcode exception */
496 TRAP_x86_DNA = T_DNA, /* Device not available exception */
497 TRAP_x86_DOUBLEFLT = T_DOUBLEFLT, /* Double fault exception */
498 TRAP_x86_FPOPFLT = T_FPOPFLT, /* Coprocessor segment overrun */
499 TRAP_x86_TSSFLT = T_TSSFLT, /* Invalid TSS exception */
500 TRAP_x86_SEGNPFLT = T_SEGNPFLT, /* Segment not present exception */
501 TRAP_x86_STKFLT = T_STKFLT, /* Stack fault */
502 TRAP_x86_PROTFLT = T_PROTFLT, /* General protection fault */
503 TRAP_x86_PAGEFLT = T_PAGEFLT, /* Page fault */
504 TRAP_x86_ARITHTRAP = T_ARITHTRAP, /* Floating point exception */
505 TRAP_x86_ALIGNFLT = T_ALIGNFLT, /* Alignment check exception */
506 TRAP_x86_MCHK = T_MCHK, /* Machine check exception */
507 TRAP_x86_CACHEFLT = T_XMMFLT /* Cache flush exception */
508 #else
509 TRAP_x86_DIVIDE = 0, /* Division by zero exception */
510 TRAP_x86_TRCTRAP = 1, /* Single-step exception */
511 TRAP_x86_NMI = 2, /* NMI interrupt */
512 TRAP_x86_BPTFLT = 3, /* Breakpoint exception */
513 TRAP_x86_OFLOW = 4, /* Overflow exception */
514 TRAP_x86_BOUND = 5, /* Bound range exception */
515 TRAP_x86_PRIVINFLT = 6, /* Invalid opcode exception */
516 TRAP_x86_DNA = 7, /* Device not available exception */
517 TRAP_x86_DOUBLEFLT = 8, /* Double fault exception */
518 TRAP_x86_FPOPFLT = 9, /* Coprocessor segment overrun */
519 TRAP_x86_TSSFLT = 10, /* Invalid TSS exception */
520 TRAP_x86_SEGNPFLT = 11, /* Segment not present exception */
521 TRAP_x86_STKFLT = 12, /* Stack fault */
522 TRAP_x86_PROTFLT = 13, /* General protection fault */
523 TRAP_x86_PAGEFLT = 14, /* Page fault */
524 TRAP_x86_ARITHTRAP = 16, /* Floating point exception */
525 TRAP_x86_ALIGNFLT = 17, /* Alignment check exception */
526 TRAP_x86_MCHK = 18, /* Machine check exception */
527 TRAP_x86_CACHEFLT = 19 /* SIMD exception (via SIGFPE) if CPU is SSE capable
528 otherwise Cache flush exception (via SIGSEV) */
529 #endif
530 };
531
532 struct x86_thread_data
533 {
534 DWORD fs; /* 1d4 TEB selector */
535 DWORD gs; /* 1d8 libc selector; update winebuild if you move this! */
536 DWORD dr0; /* 1dc debug registers */
537 DWORD dr1; /* 1e0 */
538 DWORD dr2; /* 1e4 */
539 DWORD dr3; /* 1e8 */
540 DWORD dr6; /* 1ec */
541 DWORD dr7; /* 1f0 */
542 void *exit_frame; /* 1f4 exit frame pointer */
543 #ifdef __HAVE_VM86
544 void *vm86_ptr; /* 1f8 data for vm86 mode */
545 WINE_VM86_TEB_INFO vm86; /* 1fc vm86 private data */
546 #endif
547 /* the ntdll_thread_data structure follows here */
548 };
549
550 C_ASSERT( offsetof( TEB, SystemReserved2 ) + offsetof( struct x86_thread_data, gs ) == 0x1d8 );
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 %ebp,0xb4(%eax)\n\t" /* context->Ebp */
1240 "movl 4(%esp),%edx\n\t"
1241 "movl %edx,0xb8(%eax)\n\t" /* context->Eip */
1242 "movw %cs,0xbc(%eax)\n\t" /* context->SegCs */
1243 "pushfl\n\t"
1244 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
1245 "popl 0xc0(%eax)\n\t" /* context->EFlags */
1246 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
1247 "leal 8(%esp),%edx\n\t"
1248 "movl %edx,0xc4(%eax)\n\t" /* context->Esp */
1249 "movw %ss,0xc8(%eax)\n\t" /* context->SegSs */
1250 "popl 0xb0(%eax)\n\t" /* context->Eax */
1251 __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
1252 "ret $4" )
1253
1254
1255 /***********************************************************************
1256 * set_cpu_context
1257 *
1258 * Set the new CPU context. Used by NtSetContextThread.
1259 */
1260 static void set_cpu_context( const CONTEXT *context )
1261 {
1262 DWORD flags = context->ContextFlags & ~CONTEXT_i386;
1263
1264 if ((flags & CONTEXT_EXTENDED_REGISTERS) && fpux_support) restore_fpux( context );
1265 else if (flags & CONTEXT_FLOATING_POINT) restore_fpu( context );
1266
1267 if (flags & CONTEXT_DEBUG_REGISTERS)
1268 {
1269 x86_thread_data()->dr0 = context->Dr0;
1270 x86_thread_data()->dr1 = context->Dr1;
1271 x86_thread_data()->dr2 = context->Dr2;
1272 x86_thread_data()->dr3 = context->Dr3;
1273 x86_thread_data()->dr6 = context->Dr6;
1274 x86_thread_data()->dr7 = context->Dr7;
1275 }
1276 if (flags & CONTEXT_FULL)
1277 {
1278 if (!(flags & CONTEXT_CONTROL))
1279 FIXME( "setting partial context (%x) not supported\n", flags );
1280 else if (flags & CONTEXT_SEGMENTS)
1281 __wine_restore_regs( context );
1282 else
1283 {
1284 CONTEXT newcontext = *context;
1285 newcontext.SegDs = wine_get_ds();
1286 newcontext.SegEs = wine_get_es();
1287 newcontext.SegFs = wine_get_fs();
1288 newcontext.SegGs = wine_get_gs();
1289 __wine_restore_regs( &newcontext );
1290 }
1291 }
1292 }
1293
1294
1295 /***********************************************************************
1296 * copy_context
1297 *
1298 * Copy a register context according to the flags.
1299 */
1300 static void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags )
1301 {
1302 flags &= ~CONTEXT_i386; /* get rid of CPU id */
1303 if (flags & CONTEXT_INTEGER)
1304 {
1305 to->Eax = from->Eax;
1306 to->Ebx = from->Ebx;
1307 to->Ecx = from->Ecx;
1308 to->Edx = from->Edx;
1309 to->Esi = from->Esi;
1310 to->Edi = from->Edi;
1311 }
1312 if (flags & CONTEXT_CONTROL)
1313 {
1314 to->Ebp = from->Ebp;
1315 to->Esp = from->Esp;
1316 to->Eip = from->Eip;
1317 to->SegCs = from->SegCs;
1318 to->SegSs = from->SegSs;
1319 to->EFlags = from->EFlags;
1320 }
1321 if (flags & CONTEXT_SEGMENTS)
1322 {
1323 to->SegDs = from->SegDs;
1324 to->SegEs = from->SegEs;
1325 to->SegFs = from->SegFs;
1326 to->SegGs = from->SegGs;
1327 }
1328 if (flags & CONTEXT_DEBUG_REGISTERS)
1329 {
1330 to->Dr0 = from->Dr0;
1331 to->Dr1 = from->Dr1;
1332 to->Dr2 = from->Dr2;
1333 to->Dr3 = from->Dr3;
1334 to->Dr6 = from->Dr6;
1335 to->Dr7 = from->Dr7;
1336 }
1337 if (flags & CONTEXT_FLOATING_POINT)
1338 {
1339 to->FloatSave = from->FloatSave;
1340 }
1341 if (flags & CONTEXT_EXTENDED_REGISTERS)
1342 {
1343 memcpy( to->ExtendedRegisters, from->ExtendedRegisters, sizeof(to->ExtendedRegisters) );
1344 }
1345 }
1346
1347
1348 /***********************************************************************
1349 * context_to_server
1350 *
1351 * Convert a register context to the server format.
1352 */
1353 NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
1354 {
1355 DWORD flags = from->ContextFlags & ~CONTEXT_i386; /* get rid of CPU id */
1356
1357 memset( to, 0, sizeof(*to) );
1358 to->cpu = CPU_x86;
1359
1360 if (flags & CONTEXT_CONTROL)
1361 {
1362 to->flags |= SERVER_CTX_CONTROL;
1363 to->ctl.i386_regs.ebp = from->Ebp;
1364 to->ctl.i386_regs.esp = from->Esp;
1365 to->ctl.i386_regs.eip = from->Eip;
1366 to->ctl.i386_regs.cs = from->SegCs;
1367 to->ctl.i386_regs.ss = from->SegSs;
1368 to->ctl.i386_regs.eflags = from->EFlags;
1369 }
1370 if (flags & CONTEXT_INTEGER)
1371 {
1372 to->flags |= SERVER_CTX_INTEGER;
1373 to->integer.i386_regs.eax = from->Eax;
1374 to->integer.i386_regs.ebx = from->Ebx;
1375 to->integer.i386_regs.ecx = from->Ecx;
1376 to->integer.i386_regs.edx = from->Edx;
1377 to->integer.i386_regs.esi = from->Esi;
1378 to->integer.i386_regs.edi = from->Edi;
1379 }
1380 if (flags & CONTEXT_SEGMENTS)
1381 {
1382 to->flags |= SERVER_CTX_SEGMENTS;
1383 to->seg.i386_regs.ds = from->SegDs;
1384 to->seg.i386_regs.es = from->SegEs;
1385 to->seg.i386_regs.fs = from->SegFs;
1386 to->seg.i386_regs.gs = from->SegGs;
1387 }
1388 if (flags & CONTEXT_FLOATING_POINT)
1389 {
1390 to->flags |= SERVER_CTX_FLOATING_POINT;
1391 to->fp.i386_regs.ctrl = from->FloatSave.ControlWord;
1392 to->fp.i386_regs.status = from->FloatSave.StatusWord;
1393 to->fp.i386_regs.tag = from->FloatSave.TagWord;
1394 to->fp.i386_regs.err_off = from->FloatSave.ErrorOffset;
1395 to->fp.i386_regs.err_sel = from->FloatSave.ErrorSelector;
1396 to->fp.i386_regs.data_off = from->FloatSave.DataOffset;
1397 to->fp.i386_regs.data_sel = from->FloatSave.DataSelector;
1398 to->fp.i386_regs.cr0npx = from->FloatSave.Cr0NpxState;
1399 memcpy( to->fp.i386_regs.regs, from->FloatSave.RegisterArea, sizeof(to->fp.i386_regs.regs) );
1400 }
1401 if (flags & CONTEXT_DEBUG_REGISTERS)
1402 {
1403 to->flags |= SERVER_CTX_DEBUG_REGISTERS;
1404 to->debug.i386_regs.dr0 = from->Dr0;
1405 to->debug.i386_regs.dr1 = from->Dr1;
1406 to->debug.i386_regs.dr2 = from->Dr2;
1407 to->debug.i386_regs.dr3 = from->Dr3;
1408 to->debug.i386_regs.dr6 = from->Dr6;
1409 to->debug.i386_regs.dr7 = from->Dr7;
1410 }
1411 if (flags & CONTEXT_EXTENDED_REGISTERS)
1412 {
1413 to->flags |= SERVER_CTX_EXTENDED_REGISTERS;
1414 memcpy( to->ext.i386_regs, from->ExtendedRegisters, sizeof(to->ext.i386_regs) );
1415 }
1416 return STATUS_SUCCESS;
1417 }
1418
1419
1420 /***********************************************************************
1421 * context_from_server
1422 *
1423 * Convert a register context from the server format.
1424 */
1425 NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
1426 {
1427 if (from->cpu != CPU_x86) return STATUS_INVALID_PARAMETER;
1428
1429 to->ContextFlags = CONTEXT_i386;
1430 if (from->flags & SERVER_CTX_CONTROL)
1431 {
1432 to->ContextFlags |= CONTEXT_CONTROL;
1433 to->Ebp = from->ctl.i386_regs.ebp;
1434 to->Esp = from->ctl.i386_regs.esp;
1435 to->Eip = from->ctl.i386_regs.eip;
1436 to->SegCs = from->ctl.i386_regs.cs;
1437 to->SegSs = from->ctl.i386_regs.ss;
1438 to->EFlags = from->ctl.i386_regs.eflags;
1439 }
1440 if (from->flags & SERVER_CTX_INTEGER)
1441 {
1442 to->ContextFlags |= CONTEXT_INTEGER;
1443 to->Eax = from->integer.i386_regs.eax;
1444 to->Ebx = from->integer.i386_regs.ebx;
1445 to->Ecx = from->integer.i386_regs.ecx;
1446 to->Edx = from->integer.i386_regs.edx;
1447 to->Esi = from->integer.i386_regs.esi;
1448 to->Edi = from->integer.i386_regs.edi;
1449 }
1450 if (from->flags & SERVER_CTX_SEGMENTS)
1451 {
1452 to->ContextFlags |= CONTEXT_SEGMENTS;
1453 to->SegDs = from->seg.i386_regs.ds;
1454 to->SegEs = from->seg.i386_regs.es;
1455 to->SegFs = from->seg.i386_regs.fs;
1456 to->SegGs = from->seg.i386_regs.gs;
1457 }
1458 if (from->flags & SERVER_CTX_FLOATING_POINT)
1459 {
1460 to->ContextFlags |= CONTEXT_FLOATING_POINT;
1461 to->FloatSave.ControlWord = from->fp.i386_regs.ctrl;
1462 to->FloatSave.StatusWord = from->fp.i386_regs.status;
1463 to->FloatSave.TagWord = from->fp.i386_regs.tag;
1464 to->FloatSave.ErrorOffset = from->fp.i386_regs.err_off;
1465 to->FloatSave.ErrorSelector = from->fp.i386_regs.err_sel;
1466 to->FloatSave.DataOffset = from->fp.i386_regs.data_off;
1467 to->FloatSave.DataSelector = from->fp.i386_regs.data_sel;
1468 to->FloatSave.Cr0NpxState = from->fp.i386_regs.cr0npx;
1469 memcpy( to->FloatSave.RegisterArea, from->fp.i386_regs.regs, sizeof(to->FloatSave.RegisterArea) );
1470 }
1471 if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
1472 {
1473 to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
1474 to->Dr0 = from->debug.i386_regs.dr0;
1475 to->Dr1 = from->debug.i386_regs.dr1;
1476 to->Dr2 = from->debug.i386_regs.dr2;
1477 to->Dr3 = from->debug.i386_regs.dr3;
1478 to->Dr6 = from->debug.i386_regs.dr6;
1479 to->Dr7 = from->debug.i386_regs.dr7;
1480 }
1481 if (from->flags & SERVER_CTX_EXTENDED_REGISTERS)
1482 {
1483 to->ContextFlags |= CONTEXT_EXTENDED_REGISTERS;
1484 memcpy( to->ExtendedRegisters, from->ext.i386_regs, sizeof(to->ExtendedRegisters) );
1485 }
1486 return STATUS_SUCCESS;
1487 }
1488
1489
1490 /***********************************************************************
1491 * NtSetContextThread (NTDLL.@)
1492 * ZwSetContextThread (NTDLL.@)
1493 */
1494 NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
1495 {
1496 NTSTATUS ret = STATUS_SUCCESS;
1497 BOOL self = (handle == GetCurrentThread());
1498
1499 /* debug registers require a server call */
1500 if (self && (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386)))
1501 self = (x86_thread_data()->dr0 == context->Dr0 &&
1502 x86_thread_data()->dr1 == context->Dr1 &&
1503 x86_thread_data()->dr2 == context->Dr2 &&
1504 x86_thread_data()->dr3 == context->Dr3 &&
1505 x86_thread_data()->dr6 == context->Dr6 &&
1506 x86_thread_data()->dr7 == context->Dr7);
1507
1508 if (!self) ret = set_thread_context( handle, context, &self );
1509
1510 if (self && ret == STATUS_SUCCESS) set_cpu_context( context );
1511 return ret;
1512 }
1513
1514
1515 /***********************************************************************
1516 * NtGetContextThread (NTDLL.@)
1517 * ZwGetContextThread (NTDLL.@)
1518 */
1519 NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
1520 {
1521 NTSTATUS ret;
1522 DWORD needed_flags = context->ContextFlags;
1523 BOOL self = (handle == GetCurrentThread());
1524
1525 /* debug registers require a server call */
1526 if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386)) self = FALSE;
1527
1528 if (!self)
1529 {
1530 if ((ret = get_thread_context( handle, context, &self ))) return ret;
1531 needed_flags &= ~context->ContextFlags;
1532 }
1533
1534 if (self)
1535 {
1536 if (needed_flags)
1537 {
1538 CONTEXT ctx;
1539 RtlCaptureContext( &ctx );
1540 copy_context( context, &ctx, ctx.ContextFlags & needed_flags );
1541 context->ContextFlags |= ctx.ContextFlags & needed_flags;
1542 }
1543 /* update the cached version of the debug registers */
1544 if (context->ContextFlags & (CONTEXT_DEBUG_REGISTERS & ~CONTEXT_i386))
1545 {
1546 x86_thread_data()->dr0 = context->Dr0;
1547 x86_thread_data()->dr1 = context->Dr1;
1548 x86_thread_data()->dr2 = context->Dr2;
1549 x86_thread_data()->dr3 = context->Dr3;
1550 x86_thread_data()->dr6 = context->Dr6;
1551 x86_thread_data()->dr7 = context->Dr7;
1552 }
1553 }
1554 return STATUS_SUCCESS;
1555 }
1556
1557
1558 /***********************************************************************
1559 * is_privileged_instr
1560 *
1561 * Check if the fault location is a privileged instruction.
1562 * Based on the instruction emulation code in dlls/kernel/instr.c.
1563 */
1564 static inline DWORD is_privileged_instr( CONTEXT *context )
1565 {
1566 const BYTE *instr;
1567 unsigned int prefix_count = 0;
1568
1569 if (!wine_ldt_is_system( context->SegCs )) return 0;
1570 instr = (BYTE *)context->Eip;
1571
1572 for (;;) switch(*instr)
1573 {
1574 /* instruction prefixes */
1575 case 0x2e: /* %cs: */
1576 case 0x36: /* %ss: */
1577 case 0x3e: /* %ds: */
1578 case 0x26: /* %es: */
1579 case 0x64: /* %fs: */
1580 case 0x65: /* %gs: */
1581 case 0x66: /* opcode size */
1582 case 0x67: /* addr size */
1583 case 0xf0: /* lock */
1584 case 0xf2: /* repne */
1585 case 0xf3: /* repe */
1586 if (++prefix_count >= 15) return EXCEPTION_ILLEGAL_INSTRUCTION;
1587 instr++;
1588 continue;
1589
1590 case 0x0f: /* extended instruction */
1591 switch(instr[1])
1592 {
1593 case 0x20: /* mov crX, reg */
1594 case 0x21: /* mov drX, reg */
1595 case 0x22: /* mov reg, crX */
1596 case 0x23: /* mov reg drX */
1597 return EXCEPTION_PRIV_INSTRUCTION;
1598 }
1599 return 0;
1600 case 0x6c: /* insb (%dx) */
1601 case 0x6d: /* insl (%dx) */
1602 case 0x6e: /* outsb (%dx) */
1603 case 0x6f: /* outsl (%dx) */
1604 case 0xcd: /* int $xx */
1605 case 0xe4: /* inb al,XX */
1606 case 0xe5: /* in (e)ax,XX */
1607 case 0xe6: /* outb XX,al */
1608 case 0xe7: /* out XX,(e)ax */
1609 case 0xec: /* inb (%dx),%al */
1610 case 0xed: /* inl (%dx),%eax */
1611 case 0xee: /* outb %al,(%dx) */
1612 case 0xef: /* outl %eax,(%dx) */
1613 case 0xf4: /* hlt */
1614 case 0xfa: /* cli */
1615 case 0xfb: /* sti */
1616 return EXCEPTION_PRIV_INSTRUCTION;
1617 default:
1618 return 0;
1619 }
1620 }
1621
1622
1623 /***********************************************************************
1624 * handle_interrupt
1625 *
1626 * Handle an interrupt.
1627 */
1628 static inline BOOL handle_interrupt( unsigned int interrupt, EXCEPTION_RECORD *rec, CONTEXT *context )
1629 {
1630 switch(interrupt)
1631 {
1632 case 0x2d:
1633 context->Eip += 3;
1634 rec->ExceptionCode = EXCEPTION_BREAKPOINT;
1635 rec->ExceptionAddress = (void *)context->Eip;
1636 rec->NumberParameters = is_wow64 ? 1 : 3;
1637 rec->ExceptionInformation[0] = context->Eax;
1638 rec->ExceptionInformation[1] = context->Ecx;
1639 rec->ExceptionInformation[2] = context->Edx;
1640 return TRUE;
1641 default:
1642 return FALSE;
1643 }
1644 }
1645
1646
1647 /***********************************************************************
1648 * check_invalid_gs
1649 *
1650 * Check for fault caused by invalid %gs value (some copy protection schemes mess with it).
1651 */
1652 static inline BOOL check_invalid_gs( CONTEXT *context )
1653 {
1654 unsigned int prefix_count = 0;
1655 const BYTE *instr = (BYTE *)context->Eip;
1656 WORD system_gs = x86_thread_data()->gs;
1657
1658 if (context->SegGs == system_gs) return FALSE;
1659 if (!wine_ldt_is_system( context->SegCs )) return FALSE;
1660 /* only handle faults in system libraries */
1661 if (virtual_is_valid_code_address( instr, 1 )) return FALSE;
1662
1663 for (;;) switch(*instr)
1664 {
1665 /* instruction prefixes */
1666 case 0x2e: /* %cs: */
1667 case 0x36: /* %ss: */
1668 case 0x3e: /* %ds: */
1669 case 0x26: /* %es: */
1670 case 0x64: /* %fs: */
1671 case 0x66: /* opcode size */
1672 case 0x67: /* addr size */
1673 case 0xf0: /* lock */
1674 case 0xf2: /* repne */
1675 case 0xf3: /* repe */
1676 if (++prefix_count >= 15) return FALSE;
1677 instr++;
1678 continue;
1679 case 0x65: /* %gs: */
1680 TRACE( "%04x/%04x at %p, fixing up\n", context->SegGs, system_gs, instr );
1681 context->SegGs = system_gs;
1682 return TRUE;
1683 default:
1684 return FALSE;
1685 }
1686 }
1687
1688
1689 #include "pshpack1.h"
1690 union atl_thunk
1691 {
1692 struct
1693 {
1694 DWORD movl; /* movl this,4(%esp) */
1695 DWORD this;
1696 BYTE jmp; /* jmp func */
1697 int func;
1698 } t1;
1699 struct
1700 {
1701 BYTE movl; /* movl this,ecx */
1702 DWORD this;
1703 BYTE jmp; /* jmp func */
1704 int func;
1705 } t2;
1706 struct
1707 {
1708 BYTE movl1; /* movl this,edx */
1709 DWORD this;
1710 BYTE movl2; /* movl func,ecx */
1711 DWORD func;
1712 WORD jmp; /* jmp ecx */
1713 } t3;
1714 struct
1715 {
1716 BYTE movl1; /* movl this,ecx */
1717 DWORD this;
1718 BYTE movl2; /* movl func,eax */
1719 DWORD func;
1720 WORD jmp; /* jmp eax */
1721 } t4;
1722 struct
1723 {
1724 DWORD inst1; /* pop ecx
1725 * pop eax
1726 * push ecx
1727 * jmp 4(%eax) */
1728 WORD inst2;
1729 } t5;
1730 };
1731 #include "poppack.h"
1732
1733 /**********************************************************************
1734 * check_atl_thunk
1735 *
1736 * Check if code destination is an ATL thunk, and emulate it if so.
1737 */
1738 static BOOL check_atl_thunk( EXCEPTION_RECORD *rec, CONTEXT *context )
1739 {
1740 const union atl_thunk *thunk = (const union atl_thunk *)rec->ExceptionInformation[1];
1741 union atl_thunk thunk_copy;
1742 SIZE_T thunk_len;
1743
1744 thunk_len = virtual_uninterrupted_read_memory( thunk, &thunk_copy, sizeof(*thunk) );
1745 if (!thunk_len) return FALSE;
1746
1747 if (thunk_len >= sizeof(thunk_copy.t1) && thunk_copy.t1.movl == 0x042444c7 &&
1748 thunk_copy.t1.jmp == 0xe9)
1749 {
1750 if (virtual_uninterrupted_write_memory( (DWORD *)context->Esp + 1,
1751 &thunk_copy.t1.this, sizeof(DWORD) ) == sizeof(DWORD))
1752 {
1753 context->Eip = (DWORD_PTR)(&thunk->t1.func + 1) + thunk_copy.t1.func;
1754 TRACE( "emulating ATL thunk type 1 at %p, func=%08x arg=%08x\n",
1755 thunk, context->Eip, thunk_copy.t1.this );
1756 return TRUE;
1757 }
1758 }
1759 else if (thunk_len >= sizeof(thunk_copy.t2) && thunk_copy.t2.movl == 0xb9 &&
1760 thunk_copy.t2.jmp == 0xe9)
1761 {
1762 context->Ecx = thunk_copy.t2.this;
1763 context->Eip = (DWORD_PTR)(&thunk->t2.func + 1) + thunk_copy.t2.func;
1764 TRACE( "emulating ATL thunk type 2 at %p, func=%08x ecx=%08x\n",
1765 thunk, context->Eip, context->Ecx );
1766 return TRUE;
1767 }
1768 else if (thunk_len >= sizeof(thunk_copy.t3) && thunk_copy.t3.movl1 == 0xba &&
1769 thunk_copy.t3.movl2 == 0xb9 &&
1770 thunk_copy.t3.jmp == 0xe1ff)
1771 {
1772 context->Edx = thunk_copy.t3.this;
1773 context->Ecx = thunk_copy.t3.func;
1774 context->Eip = thunk_copy.t3.func;
1775 TRACE( "emulating ATL thunk type 3 at %p, func=%08x ecx=%08x edx=%08x\n",
1776 thunk, context->Eip, context->Ecx, context->Edx );
1777 return TRUE;
1778 }
1779 else if (thunk_len >= sizeof(thunk_copy.t4) && thunk_copy.t4.movl1 == 0xb9 &&
1780 thunk_copy.t4.movl2 == 0xb8 &&
1781 thunk_copy.t4.jmp == 0xe0ff)
1782 {
1783 context->Ecx = thunk_copy.t4.this;
1784 context->Eax = thunk_copy.t4.func;
1785 context->Eip = thunk_copy.t4.func;
1786 TRACE( "emulating ATL thunk type 4 at %p, func=%08x eax=%08x ecx=%08x\n",
1787 thunk, context->Eip, context->Eax, context->Ecx );
1788 return TRUE;
1789 }
1790 else if (thunk_len >= sizeof(thunk_copy.t5) && thunk_copy.t5.inst1 == 0xff515859 &&
1791 thunk_copy.t5.inst2 == 0x0460)
1792 {
1793 DWORD func, stack[2];
1794 if (virtual_uninterrupted_read_memory( (DWORD *)context->Esp,
1795 stack, sizeof(stack) ) == sizeof(stack) &&
1796 virtual_uninterrupted_read_memory( (DWORD *)stack[1] + 1,
1797 &func, sizeof(DWORD) ) == sizeof(DWORD) &&
1798 virtual_uninterrupted_write_memory( (DWORD *)context->Esp + 1,
1799 &stack[0], sizeof(stack[0]) ) == sizeof(stack[0]))
1800 {
1801 context->Ecx = stack[0];
1802 context->Eax = stack[1];
1803 context->Esp = context->Esp + sizeof(DWORD);
1804 context->Eip = func;
1805 TRACE( "emulating ATL thunk type 5 at %p, func=%08x eax=%08x ecx=%08x esp=%08x\n",
1806 thunk, context->Eip, context->Eax, context->Ecx, context->Esp );
1807 return TRUE;
1808 }
1809 }
1810
1811 return FALSE;
1812 }
1813
1814
1815 /***********************************************************************
1816 * setup_exception_record
1817 *
1818 * Setup the exception record and context on the thread stack.
1819 */
1820 static EXCEPTION_RECORD *setup_exception_record( ucontext_t *sigcontext, void *stack_ptr,
1821 WORD fs, WORD gs, raise_func func )
1822 {
1823 struct stack_layout
1824 {
1825 void *ret_addr; /* return address from raise_func */
1826 EXCEPTION_RECORD *rec_ptr; /* first arg for raise_func */
1827 CONTEXT *context_ptr; /* second arg for raise_func */
1828 CONTEXT context;
1829 EXCEPTION_RECORD rec;
1830 DWORD ebp;
1831 DWORD eip;
1832 } *stack = stack_ptr;
1833 DWORD exception_code = 0;
1834
1835 /* stack sanity checks */
1836
1837 if ((char *)stack >= (char *)get_signal_stack() &&
1838 (char *)stack < (char *)get_signal_stack() + signal_stack_size)
1839 {
1840 WINE_ERR( "nested exception on signal stack in thread %04x eip %08x esp %08x stack %p-%p\n",
1841 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1842 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit,
1843 NtCurrentTeb()->Tib.StackBase );
1844 abort_thread(1);
1845 }
1846
1847 if (stack - 1 > stack || /* check for overflow in subtraction */
1848 (char *)stack <= (char *)NtCurrentTeb()->DeallocationStack ||
1849 (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase)
1850 {
1851 WARN( "exception outside of stack limits in thread %04x eip %08x esp %08x stack %p-%p\n",
1852 GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1853 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->Tib.StackLimit,
1854 NtCurrentTeb()->Tib.StackBase );
1855 }
1856 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->DeallocationStack + 4096)
1857 {
1858 /* stack overflow on last page, unrecoverable */
1859 UINT diff = (char *)NtCurrentTeb()->DeallocationStack + 4096 - (char *)(stack - 1);
1860 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1861 diff, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1862 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1863 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1864 abort_thread(1);
1865 }
1866 else if ((char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit)
1867 {
1868 /* stack access below stack limit, may be recoverable */
1869 if (virtual_handle_stack_fault( stack - 1 )) exception_code = EXCEPTION_STACK_OVERFLOW;
1870 else
1871 {
1872 UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit - (char *)(stack - 1);
1873 WINE_ERR( "stack overflow %u bytes in thread %04x eip %08x esp %08x stack %p-%p-%p\n",
1874 diff, GetCurrentThreadId(), (unsigned int) EIP_sig(sigcontext),
1875 (unsigned int) ESP_sig(sigcontext), NtCurrentTeb()->DeallocationStack,
1876 NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
1877 abort_thread(1);
1878 }
1879 }
1880
1881 stack--; /* push the stack_layout structure */
1882 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
1883 VALGRIND_MAKE_MEM_UNDEFINED(stack, sizeof(*stack));
1884 #elif defined(VALGRIND_MAKE_WRITABLE)
1885 VALGRIND_MAKE_WRITABLE(stack, sizeof(*stack));
1886 #endif
1887 stack->ret_addr = (void *)0xdeadbabe; /* raise_func must not return */
1888 stack->rec_ptr = &stack->rec;
1889 stack->context_ptr = &stack->context;
1890
1891 stack->rec.ExceptionRecord = NULL;
1892 stack->rec.ExceptionCode = exception_code;
1893 stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
1894 stack->rec.ExceptionAddress = (LPVOID)EIP_sig(sigcontext);
1895 stack->rec.NumberParameters = 0;
1896
1897 save_context( &stack->context, sigcontext, fs, gs );
1898
1899 /* now modify the sigcontext to return to the raise function */
1900 ESP_sig(sigcontext) = (DWORD)stack;
1901 EIP_sig(sigcontext) = (DWORD)func;
1902 /* clear single-step, direction, and align check flag */
1903 EFL_sig(sigcontext) &= ~(0x100|0x400|0x40000);
1904 CS_sig(sigcontext) = wine_get_cs();
1905 DS_sig(sigcontext) = wine_get_ds();
1906 ES_sig(sigcontext) = wine_get_es();
1907 FS_sig(sigcontext) = wine_get_fs();
1908 GS_sig(sigcontext) = wine_get_gs();
1909 SS_sig(sigcontext) = wine_get_ss();
1910
1911 return stack->rec_ptr;
1912 }
1913
1914
1915 /***********************************************************************
1916 * setup_exception
1917 *
1918 * Setup a proper stack frame for the raise function, and modify the
1919 * sigcontext so that the return from the signal handler will call
1920 * the raise function.
1921 */
1922 static EXCEPTION_RECORD *setup_exception( ucontext_t *sigcontext, raise_func func )
1923 {
1924 WORD fs, gs;
1925 void *stack = init_handler( sigcontext, &fs, &gs );
1926
1927 return setup_exception_record( sigcontext, stack, fs, gs, func );
1928 }
1929
1930
1931 /***********************************************************************
1932 * get_exception_context
1933 *
1934 * Get a pointer to the context built by setup_exception.
1935 */
1936 static inline CONTEXT *get_exception_context( EXCEPTION_RECORD *rec )
1937 {
1938 return (CONTEXT *)rec - 1; /* cf. stack_layout structure */
1939 }
1940
1941
1942 /**********************************************************************
1943 * get_fpu_code
1944 *
1945 * Get the FPU exception code from the FPU status.
1946 */
1947 static inline DWORD get_fpu_code( const CONTEXT *context )
1948 {
1949 DWORD status = context->FloatSave.StatusWord & ~(context->FloatSave.ControlWord & 0x3f);
1950
1951 if (status & 0x01) /* IE */
1952 {
1953 if (status & 0x40) /* SF */
1954 return EXCEPTION_FLT_STACK_CHECK;
1955 else
1956 return EXCEPTION_FLT_INVALID_OPERATION;
1957 }
1958 if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
1959 if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
1960 if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
1961 if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
1962 if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
1963 return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
1964 }
1965
1966
1967 /**********************************************************************
1968 * raise_segv_exception
1969 */
1970 static void WINAPI raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
1971 {
1972 NTSTATUS status;
1973
1974 switch(rec->ExceptionCode)
1975 {
1976 case EXCEPTION_ACCESS_VIOLATION:
1977 if (rec->NumberParameters == 2)
1978 {
1979 if (rec->ExceptionInformation[1] == 0xffffffff && check_invalid_gs( context ))
1980 goto done;
1981 if (!(rec->ExceptionCode = virtual_handle_fault( (void *)rec->ExceptionInformation[1],
1982 rec->ExceptionInformation[0], FALSE )))
1983 goto done;
1984 if (rec->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
1985 rec->ExceptionInformation[0] == EXCEPTION_EXECUTE_FAULT)
1986 {
1987 ULONG flags;
1988 NtQueryInformationProcess( GetCurrentProcess(), ProcessExecuteFlags,
1989 &flags, sizeof(flags), NULL );
1990
1991 if (!(flags & MEM_EXECUTE_OPTION_DISABLE_THUNK_EMULATION) && check_atl_thunk( rec, context ))
1992 goto done;
1993
1994 /* send EXCEPTION_EXECUTE_FAULT only if data execution prevention is enabled */
1995 if (!(flags & MEM_EXECUTE_OPTION_DISABLE))
1996 rec->ExceptionInformation[0] = EXCEPTION_READ_FAULT;
1997 }
1998 }
1999 break;
2000 case EXCEPTION_DATATYPE_MISALIGNMENT:
2001 /* FIXME: pass through exception handler first? */
2002 if (context->EFlags & 0x00040000)
2003 {
2004 /* Disable AC flag, return */
2005 context->EFlags &= ~0x00040000;
2006 goto done;
2007 }
2008 break;
2009 case EXCEPTION_BREAKPOINT:
2010 if (!is_wow64)
2011 {
2012 /* On Wow64, the upper DWORD of Rax contains garbage, and the debug
2013 * service is usually not recognized when called from usermode. */
2014 switch (rec->ExceptionInformation[0])
2015 {
2016 case 1: /* BREAKPOINT_PRINT */
2017 case 3: /* BREAKPOINT_LOAD_SYMBOLS */
2018 case 4: /* BREAKPOINT_UNLOAD_SYMBOLS */
2019 case 5: /* BREAKPOINT_COMMAND_STRING (>= Win2003) */
2020 goto done;
2021 }
2022 }
2023 break;
2024 }
2025 status = NtRaiseException( rec, context, TRUE );
2026 raise_status( status, rec );
2027 done:
2028 set_cpu_context( context );
2029 }
2030
2031
2032 /**********************************************************************
2033 * raise_trap_exception
2034 */
2035 static void WINAPI raise_trap_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2036 {
2037 NTSTATUS status;
2038
2039 if (rec->ExceptionCode == EXCEPTION_SINGLE_STEP)
2040 {
2041 /* when single stepping can't tell whether this is a hw bp or a
2042 * single step interrupt. try to avoid as much overhead as possible
2043 * and only do a server call if there is any hw bp enabled. */
2044
2045 if( !(context->EFlags & 0x100) || (x86_thread_data()->dr7 & 0xff) )
2046 {
2047 /* (possible) hardware breakpoint, fetch the debug registers */
2048 DWORD saved_flags = context->ContextFlags;
2049 context->ContextFlags = CONTEXT_DEBUG_REGISTERS;
2050 NtGetContextThread(GetCurrentThread(), context);
2051 context->ContextFlags |= saved_flags; /* restore flags */
2052 }
2053
2054 context->EFlags &= ~0x100; /* clear single-step flag */
2055 }
2056
2057 status = NtRaiseException( rec, context, TRUE );
2058 raise_status( status, rec );
2059 }
2060
2061
2062 /**********************************************************************
2063 * raise_generic_exception
2064 *
2065 * Generic raise function for exceptions that don't need special treatment.
2066 */
2067 static void WINAPI raise_generic_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2068 {
2069 NTSTATUS status;
2070
2071 status = NtRaiseException( rec, context, TRUE );
2072 raise_status( status, rec );
2073 }
2074
2075
2076 #ifdef __HAVE_VM86
2077 /**********************************************************************
2078 * raise_vm86_sti_exception
2079 */
2080 static void WINAPI raise_vm86_sti_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
2081 {
2082 /* merge_vm86_pending_flags merges the vm86_pending flag in safely */
2083 get_vm86_teb_info()->vm86_pending |= VIP_FLAG;
2084
2085 if (x86_thread_data()->vm86_ptr)
2086 {
2087 if (((char*)context->Eip >= (char*)vm86_return) &&
2088 ((char*)context->Eip <= (char*)vm86_return_end) &&
2089 (VM86_TYPE(context->Eax) != VM86_SIGNAL)) {
2090 /* exiting from VM86, can't throw */
2091 goto done;
2092 }
2093 merge_vm86_pending_flags( rec );
2094 }
2095 else if (get_vm86_teb_info()->dpmi_vif &&
2096 !wine_ldt_is_system(context->SegCs) &&
2097 !wine_ldt_is_system(context->SegSs))
2098 {
2099 /* Executing DPMI code and virtual interrupts are enabled. */
2100 get_vm86_teb_info()->vm86_pending = 0;
2101 NtRaiseException( rec, context, TRUE );
2102 }
2103 done:
2104 set_cpu_context( context );
2105 }
2106
2107
2108 /**********************************************************************
2109 * usr2_handler
2110 *
2111 * Handler for SIGUSR2.
2112 * We use it to signal that the running __wine_enter_vm86() should
2113 * immediately set VIP_FLAG, causing pending events to be handled
2114 * as early as possible.
2115 */
2116 static void usr2_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2117 {
2118 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_vm86_sti_exception );
2119 rec->ExceptionCode = EXCEPTION_VM86_STI;
2120 }
2121 #endif /* __HAVE_VM86 */
2122
2123
2124 /**********************************************************************
2125 * segv_handler
2126 *
2127 * Handler for SIGSEGV and related errors.
2128 */
2129 static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2130 {
2131 WORD fs, gs;
2132 EXCEPTION_RECORD *rec;
2133 ucontext_t *context = sigcontext;
2134 void *stack = init_handler( sigcontext, &fs, &gs );
2135
2136 /* check for exceptions on the signal stack caused by write watches */
2137 if (get_trap_code(context) == TRAP_x86_PAGEFLT &&
2138 (char *)stack >= (char *)get_signal_stack() &&
2139 (char *)stack < (char *)get_signal_stack() + signal_stack_size &&
2140 !virtual_handle_fault( siginfo->si_addr, (get_error_code(context) >> 1) & 0x09, TRUE ))
2141 {
2142 return;
2143 }
2144
2145 /* check for page fault inside the thread stack */
2146 if (get_trap_code(context) == TRAP_x86_PAGEFLT &&
2147 (char *)siginfo->si_addr >= (char *)NtCurrentTeb()->DeallocationStack &&
2148 (char *)siginfo->si_addr < (char *)NtCurrentTeb()->Tib.StackBase &&
2149 virtual_handle_stack_fault( siginfo->si_addr ))
2150 {
2151 /* check if this was the last guard page */
2152 if ((char *)siginfo->si_addr < (char *)NtCurrentTeb()->DeallocationStack + 2*4096)
2153 {
2154 rec = setup_exception_record( context, stack, fs, gs, raise_segv_exception );
2155 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
2156 }
2157 return;
2158 }
2159
2160 rec = setup_exception_record( context, stack, fs, gs, raise_segv_exception );
2161 if (rec->ExceptionCode == EXCEPTION_STACK_OVERFLOW) return;
2162
2163 switch(get_trap_code(context))
2164 {
2165 case TRAP_x86_OFLOW: /* Overflow exception */
2166 rec->ExceptionCode = EXCEPTION_INT_OVERFLOW;
2167 break;
2168 case TRAP_x86_BOUND: /* Bound range exception */
2169 rec->ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
2170 break;
2171 case TRAP_x86_PRIVINFLT: /* Invalid opcode exception */
2172 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2173 break;
2174 case TRAP_x86_STKFLT: /* Stack fault */
2175 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
2176 break;
2177 case TRAP_x86_SEGNPFLT: /* Segment not present exception */
2178 case TRAP_x86_PROTFLT: /* General protection fault */
2179 case TRAP_x86_UNKNOWN: /* Unknown fault code */
2180 {
2181 CONTEXT *win_context = get_exception_context( rec );
2182 WORD err = get_error_code(context);
2183 if (!err && (rec->ExceptionCode = is_privileged_instr( win_context ))) break;
2184 if ((err & 7) == 2 && handle_interrupt( err >> 3, rec, win_context )) break;
2185 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2186 rec->NumberParameters = 2;
2187 rec->ExceptionInformation[0] = 0;
2188 /* if error contains a LDT selector, use that as fault address */
2189 if ((err & 7) == 4 && !wine_ldt_is_system( err | 7 ))
2190 rec->ExceptionInformation[1] = err & ~7;
2191 else
2192 rec->ExceptionInformation[1] = 0xffffffff;
2193 }
2194 break;
2195 case TRAP_x86_PAGEFLT: /* Page fault */
2196 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
2197 rec->NumberParameters = 2;
2198 rec->ExceptionInformation[0] = (get_error_code(context) >> 1) & 0x09;
2199 rec->ExceptionInformation[1] = (ULONG_PTR)siginfo->si_addr;
2200 break;
2201 case TRAP_x86_ALIGNFLT: /* Alignment check exception */
2202 rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
2203 break;
2204 default:
2205 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) );
2206 /* fall through */
2207 case TRAP_x86_NMI: /* NMI interrupt */
2208 case TRAP_x86_DNA: /* Device not available exception */
2209 case TRAP_x86_DOUBLEFLT: /* Double fault exception */
2210 case TRAP_x86_TSSFLT: /* Invalid TSS exception */
2211 case TRAP_x86_MCHK: /* Machine check exception */
2212 case TRAP_x86_CACHEFLT: /* Cache flush exception */
2213 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
2214 break;
2215 }
2216 }
2217
2218
2219 /**********************************************************************
2220 * trap_handler
2221 *
2222 * Handler for SIGTRAP.
2223 */
2224 static void trap_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2225 {
2226 ucontext_t *context = sigcontext;
2227 EXCEPTION_RECORD *rec = setup_exception( context, raise_trap_exception );
2228
2229 switch(get_trap_code(context))
2230 {
2231 case TRAP_x86_TRCTRAP: /* Single-step exception */
2232 rec->ExceptionCode = EXCEPTION_SINGLE_STEP;
2233 break;
2234 case TRAP_x86_BPTFLT: /* Breakpoint exception */
2235 rec->ExceptionAddress = (char *)rec->ExceptionAddress - 1; /* back up over the int3 instruction */
2236 /* fall through */
2237 default:
2238 rec->ExceptionCode = EXCEPTION_BREAKPOINT;
2239 rec->NumberParameters = is_wow64 ? 1 : 3;
2240 rec->ExceptionInformation[0] = 0;
2241 rec->ExceptionInformation[1] = 0; /* FIXME */
2242 rec->ExceptionInformation[2] = 0; /* FIXME */
2243 break;
2244 }
2245 }
2246
2247
2248 /**********************************************************************
2249 * fpe_handler
2250 *
2251 * Handler for SIGFPE.
2252 */
2253 static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2254 {
2255 CONTEXT *win_context;
2256 ucontext_t *context = sigcontext;
2257 EXCEPTION_RECORD *rec = setup_exception( context, raise_generic_exception );
2258
2259 win_context = get_exception_context( rec );
2260
2261 switch(get_trap_code(context))
2262 {
2263 case TRAP_x86_DIVIDE: /* Division by zero exception */
2264 rec->ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
2265 break;
2266 case TRAP_x86_FPOPFLT: /* Coprocessor segment overrun */
2267 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2268 break;
2269 case TRAP_x86_ARITHTRAP: /* Floating point exception */
2270 case TRAP_x86_UNKNOWN: /* Unknown fault code */
2271 rec->ExceptionCode = get_fpu_code( win_context );
2272 rec->ExceptionAddress = (LPVOID)win_context->FloatSave.ErrorOffset;
2273 break;
2274 case TRAP_x86_CACHEFLT: /* SIMD exception */
2275 /* TODO:
2276 * Behaviour only tested for divide-by-zero exceptions
2277 * Check for other SIMD exceptions as well */
2278 if(siginfo->si_code != FPE_FLTDIV && siginfo->si_code != FPE_FLTINV)
2279 FIXME("untested SIMD exception: %#x. Might not work correctly\n",
2280 siginfo->si_code);
2281
2282 rec->ExceptionCode = STATUS_FLOAT_MULTIPLE_TRAPS;
2283 rec->NumberParameters = 1;
2284 /* no idea what meaning is actually behind this but that's what native does */
2285 rec->ExceptionInformation[0] = 0;
2286 break;
2287 default:
2288 WINE_ERR( "Got unexpected trap %d\n", get_trap_code(context) );
2289 rec->ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
2290 break;
2291 }
2292 }
2293
2294
2295 /**********************************************************************
2296 * int_handler
2297 *
2298 * Handler for SIGINT.
2299 *
2300 * FIXME: should not be calling external functions on the signal stack.
2301 */
2302 static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2303 {
2304 WORD fs, gs;
2305 init_handler( sigcontext, &fs, &gs );
2306 if (!dispatch_signal(SIGINT))
2307 {
2308 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2309 rec->ExceptionCode = CONTROL_C_EXIT;
2310 }
2311 }
2312
2313 /**********************************************************************
2314 * abrt_handler
2315 *
2316 * Handler for SIGABRT.
2317 */
2318 static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2319 {
2320 EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_generic_exception );
2321 rec->ExceptionCode = EXCEPTION_WINE_ASSERTION;
2322 rec->ExceptionFlags = EH_NONCONTINUABLE;
2323 }
2324
2325
2326 /**********************************************************************
2327 * quit_handler
2328 *
2329 * Handler for SIGQUIT.
2330 */
2331 static void quit_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2332 {
2333 WORD fs, gs;
2334 init_handler( sigcontext, &fs, &gs );
2335 abort_thread(0);
2336 }
2337
2338
2339 /**********************************************************************
2340 * usr1_handler
2341 *
2342 * Handler for SIGUSR1, used to signal a thread that it got suspended.
2343 */
2344 static void usr1_handler( int signal, siginfo_t *siginfo, void *sigcontext )
2345 {
2346 CONTEXT context;
2347 WORD fs, gs;
2348
2349 init_handler( sigcontext, &fs, &gs );
2350 save_context( &context, sigcontext, fs, gs );
2351 wait_suspend( &context );
2352 restore_context( &context, sigcontext );
2353 }
2354
2355
2356 /***********************************************************************
2357 * __wine_set_signal_handler (NTDLL.@)
2358 */
2359 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
2360 {
2361 if (sig >= sizeof(handlers) / sizeof(handlers[0])) return -1;
2362 if (handlers[sig] != NULL) return -2;
2363 handlers[sig] = wsh;
2364 return 0;
2365 }
2366
2367
2368 /***********************************************************************
2369 * locking for LDT routines
2370 */
2371 static RTL_CRITICAL_SECTION ldt_section;
2372 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
2373 {
2374 0, 0, &ldt_section,
2375 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
2376 0, 0, { (DWORD_PTR)(__FILE__ ": ldt_section") }
2377 };
2378 static RTL_CRITICAL_SECTION ldt_section = { &critsect_debug, -1, 0, 0, 0, 0 };
2379 static sigset_t ldt_sigset;
2380
2381 static void ldt_lock(void)
2382 {
2383 sigset_t sigset;
2384
2385 pthread_sigmask( SIG_BLOCK, &server_block_set, &sigset );
2386 RtlEnterCriticalSection( &ldt_section );
2387 if (ldt_section.RecursionCount == 1) ldt_sigset = sigset;
2388 }
2389
2390 static void ldt_unlock(void)
2391 {
2392 if (ldt_section.RecursionCount == 1)
2393 {
2394 sigset_t sigset = ldt_sigset;
2395 RtlLeaveCriticalSection( &ldt_section );
2396 pthread_sigmask( SIG_SETMASK, &sigset, NULL );
2397 }
2398 else RtlLeaveCriticalSection( &ldt_section );
2399 }
2400
2401
2402 /**********************************************************************
2403 * signal_alloc_thread
2404 */
2405 NTSTATUS signal_alloc_thread( TEB **teb )
2406 {
2407 static size_t sigstack_zero_bits;
2408 struct x86_thread_data *thread_data;
2409 SIZE_T size;
2410 void *addr = NULL;
2411 NTSTATUS status;
2412
2413 if (!sigstack_zero_bits)
2414 {
2415 size_t min_size = teb_size + max( MINSIGSTKSZ, 8192 );
2416 /* find the first power of two not smaller than min_size */
2417 sigstack_zero_bits = 12;
2418 while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
2419 signal_stack_mask = (1 << sigstack_zero_bits) - 1;
2420 signal_stack_size = (1 << sigstack_zero_bits) - teb_size;
2421 }
2422
2423 size = signal_stack_mask + 1;
2424 if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), &addr, sigstack_zero_bits,
2425 &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
2426 {
2427 *teb = addr;
2428 (*teb)->Tib.Self = &(*teb)->Tib;
2429 (*teb)->Tib.ExceptionList = (void *)~0UL;
2430 thread_data = (struct x86_thread_data *)(*teb)->SystemReserved2;
2431 if (!(thread_data->fs = wine_ldt_alloc_fs()))
2432 {
2433 size = 0;
2434 NtFreeVirtualMemory( NtCurrentProcess(), &addr, &size, MEM_RELEASE );
2435 status = STATUS_TOO_MANY_THREADS;
2436 }
2437 }
2438 return status;
2439 }
2440
2441
2442 /**********************************************************************
2443 * signal_free_thread
2444 */
2445 void signal_free_thread( TEB *teb )
2446 {
2447 SIZE_T size;
2448 struct x86_thread_data *thread_data = (struct x86_thread_data *)teb->SystemReserved2;
2449
2450 if (thread_data) wine_ldt_free_fs( thread_data->fs );
2451 if (teb->DeallocationStack)
2452 {
2453 size = 0;
2454 NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE );
2455 }
2456 size = 0;
2457 NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
2458 }
2459
2460
2461 /**********************************************************************
2462 * signal_init_thread
2463 */
2464 void signal_init_thread( TEB *teb )
2465 {
2466 const WORD fpu_cw = 0x27f;
2467 struct x86_thread_data *thread_data = (struct x86_thread_data *)teb->SystemReserved2;
2468 LDT_ENTRY fs_entry;
2469 stack_t ss;
2470
2471 #ifdef __APPLE__
2472 int mib[2], val = 1;
2473
2474 mib[0] = CTL_KERN;
2475 mib[1] = KERN_THALTSTACK;
2476 sysctl( mib, 2, NULL, NULL, &val, sizeof(val) );
2477 #endif
2478
2479 ss.ss_sp = (char *)teb + teb_size;
2480 ss.ss_size = signal_stack_size;
2481 ss.ss_flags = 0;
2482 if (sigaltstack(&ss, NULL) == -1) perror( "sigaltstack" );
2483
2484 wine_ldt_set_base( &fs_entry, teb );
2485 wine_ldt_set_limit( &fs_entry, teb_size - 1 );
2486 wine_ldt_set_flags( &fs_entry, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
2487 wine_ldt_init_fs( thread_data->fs, &fs_entry );
2488 thread_data->gs = wine_get_gs();
2489
2490 #ifdef __GNUC__
2491 __asm__ volatile ("fninit; fldcw %0" : : "m" (fpu_cw));
2492 #else
2493 FIXME("FPU setup not implemented for this platform.\n");
2494 #endif
2495 }
2496
2497 /**********************************************************************
2498 * signal_init_process
2499 */
2500 void signal_init_process(void)
2501 {
2502 struct sigaction sig_act;
2503
2504 sig_act.sa_mask = server_block_set;
2505 sig_act.sa_flags = SA_SIGINFO | SA_RESTART;
2506 #ifdef SA_ONSTACK
2507 sig_act.sa_flags |= SA_ONSTACK;
2508 #endif
2509 #ifdef __ANDROID__
2510 sig_act.sa_flags |= SA_RESTORER;
2511 sig_act.sa_restorer = rt_sigreturn;
2512 #endif
2513 sig_act.sa_sigaction = int_handler;
2514 if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
2515 sig_act.sa_sigaction = fpe_handler;
2516 if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
2517 sig_act.sa_sigaction = abrt_handler;
2518 if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
2519 sig_act.sa_sigaction = quit_handler;
2520 if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
2521 sig_act.sa_sigaction = usr1_handler;
2522 if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
2523
2524 sig_act.sa_sigaction = segv_handler;
2525 if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
2526 if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
2527 #ifdef SIGBUS
2528 if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
2529 #endif
2530
2531 #ifdef SIGTRAP
2532 sig_act.sa_sigaction = trap_handler;
2533 if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
2534 #endif
2535
2536 #ifdef __HAVE_VM86
2537 sig_act.sa_sigaction = usr2_handler;
2538 if (sigaction( SIGUSR2, &sig_act, NULL ) == -1) goto error;
2539 #endif
2540
2541 wine_ldt_init_locking( ldt_lock, ldt_unlock );
2542 return;
2543
2544 error:
2545 perror("sigaction");
2546 exit(1);
2547 }
2548
2549
2550 #ifdef __HAVE_VM86
2551 /**********************************************************************
2552 * __wine_enter_vm86 (NTDLL.@)
2553 *
2554 * Enter vm86 mode with the specified register context.
2555 */
2556 void __wine_enter_vm86( CONTEXT *context )
2557 {
2558 EXCEPTION_RECORD rec;
2559 int res;
2560 struct vm86plus_struct vm86;
2561
2562 memset( &vm86, 0, sizeof(vm86) );
2563 for (;;)
2564 {
2565 restore_vm86_context( context, &vm86 );
2566
2567 x86_thread_data()->vm86_ptr = &vm86;
2568 merge_vm86_pending_flags( &rec );
2569
2570 res = vm86_enter( &x86_thread_data()->vm86_ptr ); /* uses and clears teb->vm86_ptr */
2571 if (res < 0)
2572 {
2573 errno = -res;
2574 return;
2575 }
2576
2577 save_vm86_context( context, &vm86 );
2578
2579 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
2580 rec.ExceptionRecord = NULL;
2581 rec.ExceptionAddress = (LPVOID)context->Eip;
2582 rec.NumberParameters = 0;
2583
2584 switch(VM86_TYPE(res))
2585 {
2586 case VM86_UNKNOWN: /* unhandled GP fault - IO-instruction or similar */
2587 rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
2588 break;
2589 case VM86_TRAP: /* return due to DOS-debugger request */
2590 switch(VM86_ARG(res))
2591 {
2592 case TRAP_x86_TRCTRAP: /* Single-step exception */
2593 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
2594 break;
2595 case TRAP_x86_BPTFLT: /* Breakpoint exception */
2596 rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */
2597 /* fall through */
2598 default:
2599 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
2600 break;
2601 }
2602 break;
2603 case VM86_INTx: /* int3/int x instruction (ARG = x) */
2604 rec.ExceptionCode = EXCEPTION_VM86_INTx;
2605 rec.NumberParameters = 1;
2606 rec.ExceptionInformation[0] = VM86_ARG(res);
2607 break;
2608 case VM86_STI: /* sti/popf/iret instruction enabled virtual interrupts */
2609 context->EFlags |= VIF_FLAG;
2610 context->EFlags &= ~VIP_FLAG;
2611 get_vm86_teb_info()->vm86_pending = 0;
2612 rec.ExceptionCode = EXCEPTION_VM86_STI;
2613 break;
2614 case VM86_PICRETURN: /* return due to pending PIC request */
2615 rec.ExceptionCode = EXCEPTION_VM86_PICRETURN;
2616 break;
2617 case VM86_SIGNAL: /* cannot happen because vm86_enter handles this case */
2618 default:
2619 WINE_ERR( "unhandled result from vm86 mode %x\n", res );
2620 continue;
2621 }
2622 raise_exception( &rec, context, TRUE );
2623 }
2624 }
2625
2626 #else /* __HAVE_VM86 */
2627 /**********************************************************************
2628 * __wine_enter_vm86 (NTDLL.@)
2629 */
2630 void __wine_enter_vm86( CONTEXT *context )
2631 {
2632 MESSAGE("vm86 mode not supported on this platform\n");
2633 }
2634 #endif /* __HAVE_VM86 */
2635
2636
2637 /*******************************************************************
2638 * RtlUnwind (NTDLL.@)
2639 */
2640 void WINAPI __regs_RtlUnwind( EXCEPTION_REGISTRATION_RECORD* pEndFrame, PVOID targetIp,
2641 PEXCEPTION_RECORD pRecord, PVOID retval, CONTEXT *context )
2642 {
2643 EXCEPTION_RECORD record;
2644 EXCEPTION_REGISTRATION_RECORD *frame, *dispatch;
2645 DWORD res;
2646
2647 context->Eax = (DWORD)retval;
2648
2649 /* build an exception record, if we do not have one */
2650 if (!pRecord)
2651 {
2652 record.ExceptionCode = STATUS_UNWIND;
2653 record.ExceptionFlags = 0;
2654 record.ExceptionRecord = NULL;
2655 record.ExceptionAddress = (void *)context->Eip;
2656 record.NumberParameters = 0;
2657 pRecord = &record;
2658 }
2659
2660 pRecord->ExceptionFlags |= EH_UNWINDING | (pEndFrame ? 0 : EH_EXIT_UNWIND);
2661
2662 TRACE( "code=%x flags=%x\n", pRecord->ExceptionCode, pRecord->ExceptionFlags );
2663
2664 /* get chain of exception frames */
2665 frame = NtCurrentTeb()->Tib.ExceptionList;
2666 while ((frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL) && (frame != pEndFrame))
2667 {
2668 /* Check frame address */
2669 if (pEndFrame && (frame > pEndFrame))
2670 raise_status( STATUS_INVALID_UNWIND_TARGET, pRecord );
2671
2672 if (!is_valid_frame( frame )) raise_status( STATUS_BAD_STACK, pRecord );
2673
2674 /* Call handler */
2675 TRACE( "calling handler at %p code=%x flags=%x\n",
2676 frame->Handler, pRecord->ExceptionCode, pRecord->ExceptionFlags );
2677 res = EXC_CallHandler( pRecord, frame, context, &dispatch, frame->Handler, unwind_handler );
2678 TRACE( "handler at %p returned %x\n", frame->Handler, res );
2679
2680 switch(res)
2681 {
2682 case ExceptionContinueSearch:
2683 break;
2684 case ExceptionCollidedUnwind:
2685 frame = dispatch;
2686 break;
2687 default:
2688 raise_status( STATUS_INVALID_DISPOSITION, pRecord );
2689 break;
2690 }
2691 frame = __wine_pop_frame( frame );
2692 }
2693 }
2694 DEFINE_REGS_ENTRYPOINT( RtlUnwind, 4 )
2695
2696
2697 /*******************************************************************
2698 * NtRaiseException (NTDLL.@)
2699 */
2700 NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
2701 {
2702 NTSTATUS status = raise_exception( rec, context, first_chance );
2703 if (status == STATUS_SUCCESS) NtSetContextThread( GetCurrentThread(), context );
2704 return status;
2705 }
2706
2707
2708 /***********************************************************************
2709 * RtlRaiseException (NTDLL.@)
2710 */
2711 void WINAPI __regs_RtlRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context )
2712 {
2713 NTSTATUS status;
2714
2715 rec->ExceptionAddress = (void *)context->Eip;
2716 status = raise_exception( rec, context, TRUE );
2717 if (status != STATUS_SUCCESS) raise_status( status, rec );
2718 }
2719 DEFINE_REGS_ENTRYPOINT( RtlRaiseException, 1 )
2720
2721
2722 /*************************************************************************
2723 * RtlCaptureStackBackTrace (NTDLL.@)
2724 */
2725 USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
2726 {
2727 CONTEXT context;
2728 ULONG i;
2729 ULONG *frame;
2730
2731 RtlCaptureContext( &context );
2732 if (hash) *hash = 0;
2733 frame = (ULONG *)context.Ebp;
2734
2735 while (skip--)
2736 {
2737 if (!is_valid_frame( frame )) return 0;
2738 frame = (ULONG *)*frame;
2739 }
2740
2741 for (i = 0; i < count; i++)
2742 {
2743 if (!is_valid_frame( frame )) break;
2744 buffer[i] = (void *)frame[1];
2745 if (hash) *hash += frame[1];
2746 frame = (ULONG *)*frame;
2747 }
2748 return i;
2749 }
2750
2751
2752 extern void DECLSPEC_NORETURN call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void *arg );
2753 __ASM_GLOBAL_FUNC( call_thread_entry_point,
2754 "pushl %ebp\n\t"
2755 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2756 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2757 "movl %esp,%ebp\n\t"
2758 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2759 "pushl %ebx\n\t"
2760 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2761 "pushl %esi\n\t"
2762 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
2763 "pushl %edi\n\t"
2764 __ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
2765 "pushl %ebp\n\t"
2766 "pushl 12(%ebp)\n\t"
2767 "pushl 8(%ebp)\n\t"
2768 "call " __ASM_NAME("call_thread_func") );
2769
2770 extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), void *frame );
2771 __ASM_GLOBAL_FUNC( call_thread_exit_func,
2772 "movl 4(%esp),%eax\n\t"
2773 "movl 8(%esp),%ecx\n\t"
2774 "movl 12(%esp),%ebp\n\t"
2775 __ASM_CFI(".cfi_def_cfa %ebp,4\n\t")
2776 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2777 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2778 __ASM_CFI(".cfi_rel_offset %esi,-8\n\t")
2779 __ASM_CFI(".cfi_rel_offset %edi,-12\n\t")
2780 "leal -20(%ebp),%esp\n\t"
2781 "pushl %eax\n\t"
2782 "call *%ecx" );
2783
2784 /* wrapper for apps that don't declare the thread function correctly */
2785 extern void DECLSPEC_NORETURN call_thread_func_wrapper( LPTHREAD_START_ROUTINE entry, void *arg );
2786 __ASM_GLOBAL_FUNC(call_thread_func_wrapper,
2787 "pushl %ebp\n\t"
2788 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2789 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2790 "movl %esp,%ebp\n\t"
2791 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2792 "subl $4,%esp\n\t"
2793 "pushl 12(%ebp)\n\t"
2794 "call *8(%ebp)\n\t"
2795 "leal -4(%ebp),%esp\n\t"
2796 "pushl %eax\n\t"
2797 "call " __ASM_NAME("exit_thread") "\n\t"
2798 "int $3" )
2799
2800 /***********************************************************************
2801 * call_thread_func
2802 */
2803 void call_thread_func( LPTHREAD_START_ROUTINE entry, void *arg, void *frame )
2804 {
2805 x86_thread_data()->exit_frame = frame;
2806 __TRY
2807 {
2808 call_thread_func_wrapper( entry, arg );
2809 }
2810 __EXCEPT(unhandled_exception_filter)
2811 {
2812 NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
2813 }
2814 __ENDTRY
2815 abort(); /* should not be reached */
2816 }
2817
2818 /***********************************************************************
2819 * RtlExitUserThread (NTDLL.@)
2820 */
2821 void WINAPI RtlExitUserThread( ULONG status )
2822 {
2823 if (!x86_thread_data()->exit_frame) exit_thread( status );
2824 call_thread_exit_func( status, exit_thread, x86_thread_data()->exit_frame );
2825 }
2826
2827 /***********************************************************************
2828 * abort_thread
2829 */
2830 void abort_thread( int status )
2831 {
2832 if (!x86_thread_data()->exit_frame) terminate_thread( status );
2833 call_thread_exit_func( status, terminate_thread, x86_thread_data()->exit_frame );
2834 }
2835
2836 /**********************************************************************
2837 * DbgBreakPoint (NTDLL.@)
2838 */
2839 __ASM_STDCALL_FUNC( DbgBreakPoint, 0, "int $3; ret")
2840
2841 /**********************************************************************
2842 * DbgUserBreakPoint (NTDLL.@)
2843 */
2844 __ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "int $3; ret")
2845
2846 /**********************************************************************
2847 * NtCurrentTeb (NTDLL.@)
2848 */
2849 __ASM_STDCALL_FUNC( NtCurrentTeb, 0, ".byte 0x64\n\tmovl 0x18,%eax\n\tret" )
2850
2851
2852 /**************************************************************************
2853 * _chkstk (NTDLL.@)
2854 */
2855 __ASM_STDCALL_FUNC( _chkstk, 0,
2856 "negl %eax\n\t"
2857 "addl %esp,%eax\n\t"
2858 "xchgl %esp,%eax\n\t"
2859 "movl 0(%eax),%eax\n\t" /* copy return address from old location */
2860 "movl %eax,0(%esp)\n\t"
2861 "ret" )
2862
2863 /**************************************************************************
2864 * _alloca_probe (NTDLL.@)
2865 */
2866 __ASM_STDCALL_FUNC( _alloca_probe, 0,
2867 "negl %eax\n\t"
2868 "addl %esp,%eax\n\t"
2869 "xchgl %esp,%eax\n\t"
2870 "movl 0(%eax),%eax\n\t" /* copy return address from old location */
2871 "movl %eax,0(%esp)\n\t"
2872 "ret" )
2873
2874
2875 /**********************************************************************
2876 * EXC_CallHandler (internal)
2877 *
2878 * Some exception handlers depend on EBP to have a fixed position relative to
2879 * the exception frame.
2880 * Shrinker depends on (*1) doing what it does,
2881 * (*2) being the exact instruction it is and (*3) beginning with 0x64
2882 * (i.e. the %fs prefix to the movl instruction). It also depends on the
2883 * function calling the handler having only 5 parameters (*4).
2884 */
2885 __ASM_GLOBAL_FUNC( EXC_CallHandler,
2886 "pushl %ebp\n\t"
2887 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2888 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2889 "movl %esp,%ebp\n\t"
2890 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2891 "pushl %ebx\n\t"
2892 __ASM_CFI(".cfi_rel_offset %ebx,-4\n\t")
2893 "movl 28(%ebp), %edx\n\t" /* ugly hack to pass the 6th param needed because of Shrinker */
2894 "pushl 24(%ebp)\n\t"
2895 "pushl 20(%ebp)\n\t"
2896 "pushl 16(%ebp)\n\t"
2897 "pushl 12(%ebp)\n\t"
2898 "pushl 8(%ebp)\n\t"
2899 "call " __ASM_NAME("call_exception_handler") "\n\t"
2900 "popl %ebx\n\t"
2901 __ASM_CFI(".cfi_same_value %ebx\n\t")
2902 "leave\n"
2903 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2904 __ASM_CFI(".cfi_same_value %ebp\n\t")
2905 "ret" )
2906 __ASM_GLOBAL_FUNC(call_exception_handler,
2907 "pushl %ebp\n\t"
2908 __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
2909 __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
2910 "movl %esp,%ebp\n\t"
2911 __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
2912 "subl $12,%esp\n\t"
2913 "pushl 12(%ebp)\n\t" /* make any exceptions in this... */
2914 "pushl %edx\n\t" /* handler be handled by... */
2915 ".byte 0x64\n\t"
2916 "pushl (0)\n\t" /* nested_handler (passed in edx). */
2917 ".byte 0x64\n\t"
2918 "movl %esp,(0)\n\t" /* push the new exception frame onto the exception stack. */
2919 "pushl 20(%ebp)\n\t"
2920 "pushl 16(%ebp)\n\t"
2921 "pushl 12(%ebp)\n\t"
2922 "pushl 8(%ebp)\n\t"
2923 "movl 24(%ebp), %ecx\n\t" /* (*1) */
2924 "call *%ecx\n\t" /* call handler. (*2) */
2925 ".byte 0x64\n\t"
2926 "movl (0), %esp\n\t" /* restore previous... (*3) */
2927 ".byte 0x64\n\t"
2928 "popl (0)\n\t" /* exception frame. */
2929 "movl %ebp, %esp\n\t" /* restore saved stack, in case it was corrupted */
2930 "popl %ebp\n\t"
2931 __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
2932 __ASM_CFI(".cfi_same_value %ebp\n\t")
2933 "ret $20" ) /* (*4) */
2934
2935 #endif /* __i386__ */
Windows API implementation