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ntdll: Reuse signal to trap translation for FreeBSD on ARM.
[wine.git] / dlls / ntdll / signal_arm.c
blobe01c8ce2193a351ddefc1896cfec89a76beb7ad9
1 /*
2 * ARM signal handling routines
3 *
4 * Copyright 2002 Marcus Meissner, SuSE Linux AG
5 * Copyright 2010-2013, 2015 André Hentschel
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 */
21
22 #ifdef __arm__
23
24 #include "config.h"
25 #include "wine/port.h"
26
27 #include <assert.h>
28 #include <signal.h>
29 #include <stdlib.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #ifdef HAVE_UNISTD_H
33 # include <unistd.h>
34 #endif
35 #ifdef HAVE_SYS_PARAM_H
36 # include <sys/param.h>
37 #endif
38 #ifdef HAVE_SYSCALL_H
39 # include <syscall.h>
40 #else
41 # ifdef HAVE_SYS_SYSCALL_H
42 # include <sys/syscall.h>
43 # endif
44 #endif
45 #ifdef HAVE_SYS_SIGNAL_H
46 # include <sys/signal.h>
47 #endif
48 #ifdef HAVE_SYS_UCONTEXT_H
49 # include <sys/ucontext.h>
50 #endif
51
52 #define NONAMELESSUNION
53 #define NONAMELESSSTRUCT
54 #include "ntstatus.h"
55 #define WIN32_NO_STATUS
56 #include "windef.h"
57 #include "winternl.h"
58 #include "wine/library.h"
59 #include "wine/exception.h"
60 #include "ntdll_misc.h"
61 #include "wine/debug.h"
62 #include "winnt.h"
63
64 WINE_DEFAULT_DEBUG_CHANNEL(seh);
65 WINE_DECLARE_DEBUG_CHANNEL(relay);
66
67 static pthread_key_t teb_key;
68
69 /***********************************************************************
70 * signal context platform-specific definitions
71 */
72 #ifdef linux
73
74 #if defined(__ANDROID__) && !defined(HAVE_SYS_UCONTEXT_H)
75 typedef struct ucontext
76 {
77 unsigned long uc_flags;
78 struct ucontext *uc_link;
79 stack_t uc_stack;
80 struct sigcontext uc_mcontext;
81 sigset_t uc_sigmask;
82 unsigned long uc_regspace[128] __attribute__((__aligned__(8)));
83 } ucontext_t;
84 #endif
85
86 /* All Registers access - only for local access */
87 # define REG_sig(reg_name, context) ((context)->uc_mcontext.reg_name)
88 # define REGn_sig(reg_num, context) ((context)->uc_mcontext.arm_r##reg_num)
89
90 /* Special Registers access */
91 # define SP_sig(context) REG_sig(arm_sp, context) /* Stack pointer */
92 # define LR_sig(context) REG_sig(arm_lr, context) /* Link register */
93 # define PC_sig(context) REG_sig(arm_pc, context) /* Program counter */
94 # define CPSR_sig(context) REG_sig(arm_cpsr, context) /* Current State Register */
95 # define IP_sig(context) REG_sig(arm_ip, context) /* Intra-Procedure-call scratch register */
96 # define FP_sig(context) REG_sig(arm_fp, context) /* Frame pointer */
97
98 /* Exceptions */
99 # define ERROR_sig(context) REG_sig(error_code, context)
100 # define TRAP_sig(context) REG_sig(trap_no, context)
101
102 #elif defined(__FreeBSD__)
103
104 /* All Registers access - only for local access */
105 # define REGn_sig(reg_num, context) ((context)->uc_mcontext.__gregs[reg_num])
106
107 /* Special Registers access */
108 # define SP_sig(context) REGn_sig(_REG_SP, context) /* Stack pointer */
109 # define LR_sig(context) REGn_sig(_REG_LR, context) /* Link register */
110 # define PC_sig(context) REGn_sig(_REG_PC, context) /* Program counter */
111 # define CPSR_sig(context) REGn_sig(_REG_CPSR, context) /* Current State Register */
112 # define IP_sig(context) REGn_sig(_REG_R12, context) /* Intra-Procedure-call scratch register */
113 # define FP_sig(context) REGn_sig(_REG_FP, context) /* Frame pointer */
114
115 #endif /* linux */
116
117 enum arm_trap_code
118 {
119 TRAP_ARM_UNKNOWN = -1, /* Unknown fault (TRAP_sig not defined) */
120 TRAP_ARM_PRIVINFLT = 6, /* Invalid opcode exception */
121 TRAP_ARM_PAGEFLT = 14, /* Page fault */
122 TRAP_ARM_ALIGNFLT = 17, /* Alignment check exception */
123 };
124
125 typedef void (WINAPI *raise_func)( EXCEPTION_RECORD *rec, CONTEXT *context );
126 typedef int (*wine_signal_handler)(unsigned int sig);
127
128 static wine_signal_handler handlers[256];
129
130
131 struct UNWIND_INFO
132 {
133 WORD function_length;
134 WORD unknown1 : 7;
135 WORD count : 5;
136 WORD unknown2 : 4;
137 };
138
139
140 /***********************************************************************
141 * get_trap_code
142 *
143 * Get the trap code for a signal.
144 */
145 static inline enum arm_trap_code get_trap_code( int signal, const ucontext_t *sigcontext )
146 {
147 #ifdef TRAP_sig
148 enum arm_trap_code trap = TRAP_sig(sigcontext);
149 if (trap)
150 return trap;
151 #endif
152
153 switch (signal)
154 {
155 case SIGILL:
156 return TRAP_ARM_PRIVINFLT;
157 case SIGSEGV:
158 return TRAP_ARM_PAGEFLT;
159 case SIGBUS:
160 return TRAP_ARM_ALIGNFLT;
161 default:
162 return TRAP_ARM_UNKNOWN;
163 }
164 }
165
166 /***********************************************************************
167 * get_error_code
168 *
169 * Get the error code for a signal.
170 */
171 static inline WORD get_error_code( const ucontext_t *sigcontext )
172 {
173 #ifdef ERROR_sig
174 return ERROR_sig(sigcontext);
175 #else
176 return 0;
177 #endif
178 }
179
180 /***********************************************************************
181 * dispatch_signal
182 */
183 static inline int dispatch_signal(unsigned int sig)
184 {
185 if (handlers[sig] == NULL) return 0;
186 return handlers[sig](sig);
187 }
188
189 /*******************************************************************
190 * is_valid_frame
191 */
192 static inline BOOL is_valid_frame( void *frame )
193 {
194 if ((ULONG_PTR)frame & 3) return FALSE;
195 return (frame >= NtCurrentTeb()->Tib.StackLimit &&
196 (void **)frame < (void **)NtCurrentTeb()->Tib.StackBase - 1);
197 }
198
199 /***********************************************************************
200 * save_context
201 *
202 * Set the register values from a sigcontext.
203 */
204 static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
205 {
206 #define C(x) context->R##x = REGn_sig(x,sigcontext)
207 /* Save normal registers */
208 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
209 #undef C
210
211 context->ContextFlags = CONTEXT_FULL;
212 context->Sp = SP_sig(sigcontext); /* Stack pointer */
213 context->Lr = LR_sig(sigcontext); /* Link register */
214 context->Pc = PC_sig(sigcontext); /* Program Counter */
215 context->Cpsr = CPSR_sig(sigcontext); /* Current State Register */
216 context->R11 = FP_sig(sigcontext); /* Frame pointer */
217 context->R12 = IP_sig(sigcontext); /* Intra-Procedure-call scratch register */
218 }
219
220
221 /***********************************************************************
222 * restore_context
223 *
224 * Build a sigcontext from the register values.
225 */
226 static void restore_context( const CONTEXT *context, ucontext_t *sigcontext )
227 {
228 #define C(x) REGn_sig(x,sigcontext) = context->R##x
229 /* Restore normal registers */
230 C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
231 #undef C
232
233 SP_sig(sigcontext) = context->Sp; /* Stack pointer */
234 LR_sig(sigcontext) = context->Lr ; /* Link register */
235 PC_sig(sigcontext) = context->Pc; /* Program Counter */
236 CPSR_sig(sigcontext) = context->Cpsr; /* Current State Register */
237 FP_sig(sigcontext) = context->R11; /* Frame pointer */
238 IP_sig(sigcontext) = context->R12; /* Intra-Procedure-call scratch register */
239 }
240
241
242 /***********************************************************************
243 * save_fpu
244 *
245 * Set the FPU context from a sigcontext.
246 */
247 static inline void save_fpu( CONTEXT *context, const ucontext_t *sigcontext )
248 {
249 FIXME("not implemented\n");
250 }
251
252
253 /***********************************************************************
254 * restore_fpu
255 *
256 * Restore the FPU context to a sigcontext.
257 */
258 static inline void restore_fpu( CONTEXT *context, const ucontext_t *sigcontext )
259 {
260 FIXME("not implemented\n");
261 }
262
263 /**************************************************************************
264 * __chkstk (NTDLL.@)
265 *
266 * Incoming r4 contains words to allocate, converting to bytes then return
267 */
268 __ASM_GLOBAL_FUNC( __chkstk, "lsl r4, r4, #2\n\t"
269 "bx lr" )
270
271 /***********************************************************************
272 * RtlCaptureContext (NTDLL.@)
273 */
274 /* FIXME: Use the Stack instead of the actual register values */
275 __ASM_STDCALL_FUNC( RtlCaptureContext, 4,
276 ".arm\n\t"
277 "stmib r0, {r0-r12}\n\t" /* context->R0..R12 */
278 "mov r1, #0x0200000\n\t" /* CONTEXT_ARM */
279 "add r1, r1, #0x3\n\t" /* CONTEXT_FULL */
280 "str r1, [r0]\n\t" /* context->ContextFlags */
281 "str SP, [r0, #0x38]\n\t" /* context->Sp */
282 "str LR, [r0, #0x3c]\n\t" /* context->Lr */
283 "str PC, [r0, #0x40]\n\t" /* context->Pc */
284 "mrs r1, CPSR\n\t"
285 "str r1, [r0, #0x44]\n\t" /* context->Cpsr */
286 "bx lr"
287 )
288
289
290 /***********************************************************************
291 * set_cpu_context
292 *
293 * Set the new CPU context.
294 */
295 void DECLSPEC_HIDDEN set_cpu_context( const CONTEXT *context );
296 __ASM_GLOBAL_FUNC( set_cpu_context,
297 ".arm\n\t"
298 "ldr r2, [r0, #0x44]\n\t" /* context->Cpsr */
299 "tst r2, #0x20\n\t" /* thumb? */
300 "ldr r1, [r0, #0x40]\n\t" /* context->Pc */
301 "orrne r1, r1, #1\n\t" /* Adjust PC according to thumb */
302 "biceq r1, r1, #1\n\t" /* Adjust PC according to arm */
303 "msr CPSR_f, r2\n\t"
304 "ldr lr, [r0, #0x3c]\n\t" /* context->Lr */
305 "ldr sp, [r0, #0x38]\n\t" /* context->Sp */
306 "push {r1}\n\t"
307 "ldmib r0, {r0-r12}\n\t" /* context->R0..R12 */
308 "pop {pc}" )
309
310
311 /***********************************************************************
312 * get_server_context_flags
313 *
314 * Convert CPU-specific flags to generic server flags
315 */
316 static unsigned int get_server_context_flags( DWORD flags )
317 {
318 unsigned int ret = 0;
319
320 flags &= ~CONTEXT_ARM; /* get rid of CPU id */
321 if (flags & CONTEXT_CONTROL) ret |= SERVER_CTX_CONTROL;
322 if (flags & CONTEXT_INTEGER) ret |= SERVER_CTX_INTEGER;
323 if (flags & CONTEXT_FLOATING_POINT) ret |= SERVER_CTX_FLOATING_POINT;
324 if (flags & CONTEXT_DEBUG_REGISTERS) ret |= SERVER_CTX_DEBUG_REGISTERS;
325 return ret;
326 }
327
328
329 /***********************************************************************
330 * copy_context
331 *
332 * Copy a register context according to the flags.
333 */
334 static void copy_context( CONTEXT *to, const CONTEXT *from, DWORD flags )
335 {
336 flags &= ~CONTEXT_ARM; /* get rid of CPU id */
337 if (flags & CONTEXT_CONTROL)
338 {
339 to->Sp = from->Sp;
340 to->Lr = from->Lr;
341 to->Pc = from->Pc;
342 to->Cpsr = from->Cpsr;
343 }
344 if (flags & CONTEXT_INTEGER)
345 {
346 to->R0 = from->R0;
347 to->R1 = from->R1;
348 to->R2 = from->R2;
349 to->R3 = from->R3;
350 to->R4 = from->R4;
351 to->R5 = from->R5;
352 to->R6 = from->R6;
353 to->R7 = from->R7;
354 to->R8 = from->R8;
355 to->R9 = from->R9;
356 to->R10 = from->R10;
357 to->R11 = from->R11;
358 to->R12 = from->R12;
359 }
360 if (flags & CONTEXT_FLOATING_POINT)
361 {
362 to->Fpscr = from->Fpscr;
363 memcpy( to->u.D, from->u.D, sizeof(to->u.D) );
364 }
365 }
366
367
368 /***********************************************************************
369 * context_to_server
370 *
371 * Convert a register context to the server format.
372 */
373 NTSTATUS context_to_server( context_t *to, const CONTEXT *from )
374 {
375 DWORD i, flags = from->ContextFlags & ~CONTEXT_ARM; /* get rid of CPU id */
376
377 memset( to, 0, sizeof(*to) );
378 to->cpu = CPU_ARM;
379
380 if (flags & CONTEXT_CONTROL)
381 {
382 to->flags |= SERVER_CTX_CONTROL;
383 to->ctl.arm_regs.sp = from->Sp;
384 to->ctl.arm_regs.lr = from->Lr;
385 to->ctl.arm_regs.pc = from->Pc;
386 to->ctl.arm_regs.cpsr = from->Cpsr;
387 }
388 if (flags & CONTEXT_INTEGER)
389 {
390 to->flags |= SERVER_CTX_INTEGER;
391 to->integer.arm_regs.r[0] = from->R0;
392 to->integer.arm_regs.r[1] = from->R1;
393 to->integer.arm_regs.r[2] = from->R2;
394 to->integer.arm_regs.r[3] = from->R3;
395 to->integer.arm_regs.r[4] = from->R4;
396 to->integer.arm_regs.r[5] = from->R5;
397 to->integer.arm_regs.r[6] = from->R6;
398 to->integer.arm_regs.r[7] = from->R7;
399 to->integer.arm_regs.r[8] = from->R8;
400 to->integer.arm_regs.r[9] = from->R9;
401 to->integer.arm_regs.r[10] = from->R10;
402 to->integer.arm_regs.r[11] = from->R11;
403 to->integer.arm_regs.r[12] = from->R12;
404 }
405 if (flags & CONTEXT_FLOATING_POINT)
406 {
407 to->flags |= SERVER_CTX_FLOATING_POINT;
408 for (i = 0; i < 32; i++) to->fp.arm_regs.d[i] = from->u.D[i];
409 to->fp.arm_regs.fpscr = from->Fpscr;
410 }
411 if (flags & CONTEXT_DEBUG_REGISTERS)
412 {
413 to->flags |= SERVER_CTX_DEBUG_REGISTERS;
414 for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->debug.arm_regs.bvr[i] = from->Bvr[i];
415 for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->debug.arm_regs.bcr[i] = from->Bcr[i];
416 for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->debug.arm_regs.wvr[i] = from->Wvr[i];
417 for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->debug.arm_regs.wcr[i] = from->Wcr[i];
418 }
419 return STATUS_SUCCESS;
420 }
421
422
423 /***********************************************************************
424 * context_from_server
425 *
426 * Convert a register context from the server format.
427 */
428 NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
429 {
430 DWORD i;
431
432 if (from->cpu != CPU_ARM) return STATUS_INVALID_PARAMETER;
433
434 to->ContextFlags = CONTEXT_ARM;
435 if (from->flags & SERVER_CTX_CONTROL)
436 {
437 to->ContextFlags |= CONTEXT_CONTROL;
438 to->Sp = from->ctl.arm_regs.sp;
439 to->Lr = from->ctl.arm_regs.lr;
440 to->Pc = from->ctl.arm_regs.pc;
441 to->Cpsr = from->ctl.arm_regs.cpsr;
442 }
443 if (from->flags & SERVER_CTX_INTEGER)
444 {
445 to->ContextFlags |= CONTEXT_INTEGER;
446 to->R0 = from->integer.arm_regs.r[0];
447 to->R1 = from->integer.arm_regs.r[1];
448 to->R2 = from->integer.arm_regs.r[2];
449 to->R3 = from->integer.arm_regs.r[3];
450 to->R4 = from->integer.arm_regs.r[4];
451 to->R5 = from->integer.arm_regs.r[5];
452 to->R6 = from->integer.arm_regs.r[6];
453 to->R7 = from->integer.arm_regs.r[7];
454 to->R8 = from->integer.arm_regs.r[8];
455 to->R9 = from->integer.arm_regs.r[9];
456 to->R10 = from->integer.arm_regs.r[10];
457 to->R11 = from->integer.arm_regs.r[11];
458 to->R12 = from->integer.arm_regs.r[12];
459 }
460 if (from->flags & SERVER_CTX_FLOATING_POINT)
461 {
462 to->ContextFlags |= CONTEXT_FLOATING_POINT;
463 for (i = 0; i < 32; i++) to->u.D[i] = from->fp.arm_regs.d[i];
464 to->Fpscr = from->fp.arm_regs.fpscr;
465 }
466 if (from->flags & SERVER_CTX_DEBUG_REGISTERS)
467 {
468 to->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
469 for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->Bvr[i] = from->debug.arm_regs.bvr[i];
470 for (i = 0; i < ARM_MAX_BREAKPOINTS; i++) to->Bcr[i] = from->debug.arm_regs.bcr[i];
471 for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->Wvr[i] = from->debug.arm_regs.wvr[i];
472 for (i = 0; i < ARM_MAX_WATCHPOINTS; i++) to->Wcr[i] = from->debug.arm_regs.wcr[i];
473 }
474 return STATUS_SUCCESS;
475 }
476
477 /***********************************************************************
478 * NtSetContextThread (NTDLL.@)
479 * ZwSetContextThread (NTDLL.@)
480 */
481 NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
482 {
483 NTSTATUS ret;
484 BOOL self;
485 context_t server_context;
486
487 context_to_server( &server_context, context );
488 ret = set_thread_context( handle, &server_context, &self );
489 if (self && ret == STATUS_SUCCESS) set_cpu_context( context );
490 return ret;
491 }
492
493
494 /***********************************************************************
495 * NtGetContextThread (NTDLL.@)
496 * ZwGetContextThread (NTDLL.@)
497 */
498 NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
499 {
500 NTSTATUS ret;
501 DWORD needed_flags = context->ContextFlags;
502 BOOL self = (handle == GetCurrentThread());
503
504 if (!self)
505 {
506 context_t server_context;
507 unsigned int server_flags = get_server_context_flags( context->ContextFlags );
508
509 if ((ret = get_thread_context( handle, &server_context, server_flags, &self ))) return ret;
510 if ((ret = context_from_server( context, &server_context ))) return ret;
511 needed_flags &= ~context->ContextFlags;
512 }
513
514 if (self && needed_flags)
515 {
516 CONTEXT ctx;
517 RtlCaptureContext( &ctx );
518 copy_context( context, &ctx, ctx.ContextFlags & needed_flags );
519 context->ContextFlags |= ctx.ContextFlags & needed_flags;
520 }
521 return STATUS_SUCCESS;
522 }
523
524
525 extern void raise_func_trampoline_thumb( EXCEPTION_RECORD *rec, CONTEXT *context, raise_func func );
526 __ASM_GLOBAL_FUNC( raise_func_trampoline_thumb,
527 ".thumb\n\t"
528 "blx r2\n\t"
529 "bkpt")
530
531 extern void raise_func_trampoline_arm( EXCEPTION_RECORD *rec, CONTEXT *context, raise_func func );
532 __ASM_GLOBAL_FUNC( raise_func_trampoline_arm,
533 ".arm\n\t"
534 "blx r2\n\t"
535 "bkpt")
536
537 /***********************************************************************
538 * setup_exception_record
539 *
540 * Setup the exception record and context on the thread stack.
541 */
542 static EXCEPTION_RECORD *setup_exception( ucontext_t *sigcontext, raise_func func )
543 {
544 struct stack_layout
545 {
546 CONTEXT context;
547 EXCEPTION_RECORD rec;
548 } *stack;
549 DWORD exception_code = 0;
550
551 stack = (struct stack_layout *)(SP_sig(sigcontext) & ~3);
552 stack--; /* push the stack_layout structure */
553
554 stack->rec.ExceptionRecord = NULL;
555 stack->rec.ExceptionCode = exception_code;
556 stack->rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
557 stack->rec.ExceptionAddress = (LPVOID)PC_sig(sigcontext);
558 stack->rec.NumberParameters = 0;
559
560 save_context( &stack->context, sigcontext );
561
562 /* now modify the sigcontext to return to the raise function */
563 SP_sig(sigcontext) = (DWORD)stack;
564 if (CPSR_sig(sigcontext) & 0x20)
565 PC_sig(sigcontext) = (DWORD)raise_func_trampoline_thumb;
566 else
567 PC_sig(sigcontext) = (DWORD)raise_func_trampoline_arm;
568 REGn_sig(0, sigcontext) = (DWORD)&stack->rec; /* first arg for raise_func */
569 REGn_sig(1, sigcontext) = (DWORD)&stack->context; /* second arg for raise_func */
570 REGn_sig(2, sigcontext) = (DWORD)func; /* the raise_func as third arg for the trampoline */
571
572
573 return &stack->rec;
574 }
575
576 /**********************************************************************
577 * raise_segv_exception
578 */
579 static void WINAPI raise_segv_exception( EXCEPTION_RECORD *rec, CONTEXT *context )
580 {
581 NTSTATUS status;
582
583 switch(rec->ExceptionCode)
584 {
585 case EXCEPTION_ACCESS_VIOLATION:
586 if (rec->NumberParameters == 2)
587 {
588 if (!(rec->ExceptionCode = virtual_handle_fault( (void *)rec->ExceptionInformation[1],
589 rec->ExceptionInformation[0], FALSE )))
590 goto done;
591 }
592 break;
593 }
594 status = NtRaiseException( rec, context, TRUE );
595 if (status) raise_status( status, rec );
596 done:
597 set_cpu_context( context );
598 }
599
600 /**********************************************************************
601 * call_stack_handlers
602 *
603 * Call the stack handlers chain.
604 */
605 static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *context )
606 {
607 EXCEPTION_REGISTRATION_RECORD *frame, *dispatch, *nested_frame;
608 DWORD res;
609
610 frame = NtCurrentTeb()->Tib.ExceptionList;
611 nested_frame = NULL;
612 while (frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL)
613 {
614 /* Check frame address */
615 if (!is_valid_frame( frame ))
616 {
617 rec->ExceptionFlags |= EH_STACK_INVALID;
618 break;
619 }
620
621 /* Call handler */
622 TRACE( "calling handler at %p code=%x flags=%x\n",
623 frame->Handler, rec->ExceptionCode, rec->ExceptionFlags );
624 res = frame->Handler( rec, frame, context, &dispatch );
625 TRACE( "handler at %p returned %x\n", frame->Handler, res );
626
627 if (frame == nested_frame)
628 {
629 /* no longer nested */
630 nested_frame = NULL;
631 rec->ExceptionFlags &= ~EH_NESTED_CALL;
632 }
633
634 switch(res)
635 {
636 case ExceptionContinueExecution:
637 if (!(rec->ExceptionFlags & EH_NONCONTINUABLE)) return STATUS_SUCCESS;
638 return STATUS_NONCONTINUABLE_EXCEPTION;
639 case ExceptionContinueSearch:
640 break;
641 case ExceptionNestedException:
642 if (nested_frame < dispatch) nested_frame = dispatch;
643 rec->ExceptionFlags |= EH_NESTED_CALL;
644 break;
645 default:
646 return STATUS_INVALID_DISPOSITION;
647 }
648 frame = frame->Prev;
649 }
650 return STATUS_UNHANDLED_EXCEPTION;
651 }
652
653
654 /*******************************************************************
655 * raise_exception
656 *
657 * Implementation of NtRaiseException.
658 */
659 static NTSTATUS raise_exception( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
660 {
661 NTSTATUS status;
662
663 if (first_chance)
664 {
665 DWORD c;
666
667 TRACE( "code=%x flags=%x addr=%p pc=%08x tid=%04x\n",
668 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
669 context->Pc, GetCurrentThreadId() );
670 for (c = 0; c < rec->NumberParameters; c++)
671 TRACE( " info[%d]=%08lx\n", c, rec->ExceptionInformation[c] );
672 if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
673 {
674 if (rec->ExceptionInformation[1] >> 16)
675 MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
676 rec->ExceptionAddress,
677 (char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
678 else
679 MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
680 rec->ExceptionAddress,
681 (char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
682 }
683 else
684 {
685 TRACE( " r0=%08x r1=%08x r2=%08x r3=%08x r4=%08x r5=%08x\n",
686 context->R0, context->R1, context->R2, context->R3, context->R4, context->R5 );
687 TRACE( " r6=%08x r7=%08x r8=%08x r9=%08x r10=%08x r11=%08x\n",
688 context->R6, context->R7, context->R8, context->R9, context->R10, context->R11 );
689 TRACE( " r12=%08x sp=%08x lr=%08x pc=%08x cpsr=%08x\n",
690 context->R12, context->Sp, context->Lr, context->Pc, context->Cpsr );
691 }
692
693 status = send_debug_event( rec, TRUE, context );
694 if (status == DBG_CONTINUE || status == DBG_EXCEPTION_HANDLED)
695 return STATUS_SUCCESS;
696
697 if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION)
698 return STATUS_SUCCESS;
699
700 if ((status = call_stack_handlers( rec, context )) != STATUS_UNHANDLED_EXCEPTION)
701 return status;
702 }
703
704 /* last chance exception */
705
706 status = send_debug_event( rec, FALSE, context );
707 if (status != DBG_CONTINUE)
708 {
709 if (rec->ExceptionFlags & EH_STACK_INVALID)
710 ERR("Exception frame is not in stack limits => unable to dispatch exception.\n");
711 else if (rec->ExceptionCode == STATUS_NONCONTINUABLE_EXCEPTION)
712 ERR("Process attempted to continue execution after noncontinuable exception.\n");
713 else
714 ERR("Unhandled exception code %x flags %x addr %p\n",
715 rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
716 NtTerminateProcess( NtCurrentProcess(), rec->ExceptionCode );
717 }
718 return STATUS_SUCCESS;
719 }
720
721
722 /**********************************************************************
723 * segv_handler
724 *
725 * Handler for SIGSEGV and related errors.
726 */
727 static void segv_handler( int signal, siginfo_t *info, void *ucontext )
728 {
729 EXCEPTION_RECORD *rec;
730 ucontext_t *context = ucontext;
731
732 /* check for page fault inside the thread stack */
733 if (get_trap_code(signal, context) == TRAP_ARM_PAGEFLT &&
734 (char *)info->si_addr >= (char *)NtCurrentTeb()->DeallocationStack &&
735 (char *)info->si_addr < (char *)NtCurrentTeb()->Tib.StackBase &&
736 virtual_handle_stack_fault( info->si_addr ))
737 {
738 /* check if this was the last guard page */
739 if ((char *)info->si_addr < (char *)NtCurrentTeb()->DeallocationStack + 2*4096)
740 {
741 rec = setup_exception( context, raise_segv_exception );
742 rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
743 }
744 return;
745 }
746
747 rec = setup_exception( context, raise_segv_exception );
748 if (rec->ExceptionCode == EXCEPTION_STACK_OVERFLOW) return;
749
750 switch(get_trap_code(signal, context))
751 {
752 case TRAP_ARM_PRIVINFLT: /* Invalid opcode exception */
753 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
754 break;
755 case TRAP_ARM_PAGEFLT: /* Page fault */
756 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
757 rec->NumberParameters = 2;
758 rec->ExceptionInformation[0] = (get_error_code(context) & 0x800) != 0;
759 rec->ExceptionInformation[1] = (ULONG_PTR)info->si_addr;
760 break;
761 case TRAP_ARM_ALIGNFLT: /* Alignment check exception */
762 rec->ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
763 break;
764 case TRAP_ARM_UNKNOWN: /* Unknown fault code */
765 rec->ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
766 rec->NumberParameters = 2;
767 rec->ExceptionInformation[0] = 0;
768 rec->ExceptionInformation[1] = 0xffffffff;
769 break;
770 default:
771 ERR("Got unexpected trap %d\n", get_trap_code(signal, context));
772 rec->ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
773 break;
774 }
775 }
776
777 /**********************************************************************
778 * trap_handler
779 *
780 * Handler for SIGTRAP.
781 */
782 static void trap_handler( int signal, siginfo_t *info, void *ucontext )
783 {
784 EXCEPTION_RECORD rec;
785 CONTEXT context;
786 NTSTATUS status;
787
788 switch ( info->si_code )
789 {
790 case TRAP_TRACE:
791 rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
792 break;
793 case TRAP_BRKPT:
794 default:
795 rec.ExceptionCode = EXCEPTION_BREAKPOINT;
796 break;
797 }
798
799 save_context( &context, ucontext );
800 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
801 rec.ExceptionRecord = NULL;
802 rec.ExceptionAddress = (LPVOID)context.Pc;
803 rec.NumberParameters = 0;
804 status = raise_exception( &rec, &context, TRUE );
805 if (status) raise_status( status, &rec );
806 restore_context( &context, ucontext );
807 }
808
809 /**********************************************************************
810 * fpe_handler
811 *
812 * Handler for SIGFPE.
813 */
814 static void fpe_handler( int signal, siginfo_t *siginfo, void *sigcontext )
815 {
816 EXCEPTION_RECORD rec;
817 CONTEXT context;
818 NTSTATUS status;
819
820 save_fpu( &context, sigcontext );
821 save_context( &context, sigcontext );
822
823 switch (siginfo->si_code & 0xffff )
824 {
825 #ifdef FPE_FLTSUB
826 case FPE_FLTSUB:
827 rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
828 break;
829 #endif
830 #ifdef FPE_INTDIV
831 case FPE_INTDIV:
832 rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
833 break;
834 #endif
835 #ifdef FPE_INTOVF
836 case FPE_INTOVF:
837 rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
838 break;
839 #endif
840 #ifdef FPE_FLTDIV
841 case FPE_FLTDIV:
842 rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
843 break;
844 #endif
845 #ifdef FPE_FLTOVF
846 case FPE_FLTOVF:
847 rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
848 break;
849 #endif
850 #ifdef FPE_FLTUND
851 case FPE_FLTUND:
852 rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
853 break;
854 #endif
855 #ifdef FPE_FLTRES
856 case FPE_FLTRES:
857 rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
858 break;
859 #endif
860 #ifdef FPE_FLTINV
861 case FPE_FLTINV:
862 #endif
863 default:
864 rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
865 break;
866 }
867 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
868 rec.ExceptionRecord = NULL;
869 rec.ExceptionAddress = (LPVOID)context.Pc;
870 rec.NumberParameters = 0;
871 status = raise_exception( &rec, &context, TRUE );
872 if (status) raise_status( status, &rec );
873
874 restore_context( &context, sigcontext );
875 restore_fpu( &context, sigcontext );
876 }
877
878 /**********************************************************************
879 * int_handler
880 *
881 * Handler for SIGINT.
882 */
883 static void int_handler( int signal, siginfo_t *siginfo, void *sigcontext )
884 {
885 if (!dispatch_signal(SIGINT))
886 {
887 EXCEPTION_RECORD rec;
888 CONTEXT context;
889 NTSTATUS status;
890
891 save_context( &context, sigcontext );
892 rec.ExceptionCode = CONTROL_C_EXIT;
893 rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
894 rec.ExceptionRecord = NULL;
895 rec.ExceptionAddress = (LPVOID)context.Pc;
896 rec.NumberParameters = 0;
897 status = raise_exception( &rec, &context, TRUE );
898 if (status) raise_status( status, &rec );
899 restore_context( &context, sigcontext );
900 }
901 }
902
903
904 /**********************************************************************
905 * abrt_handler
906 *
907 * Handler for SIGABRT.
908 */
909 static void abrt_handler( int signal, siginfo_t *siginfo, void *sigcontext )
910 {
911 EXCEPTION_RECORD rec;
912 CONTEXT context;
913 NTSTATUS status;
914
915 save_context( &context, sigcontext );
916 rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
917 rec.ExceptionFlags = EH_NONCONTINUABLE;
918 rec.ExceptionRecord = NULL;
919 rec.ExceptionAddress = (LPVOID)context.Pc;
920 rec.NumberParameters = 0;
921 status = raise_exception( &rec, &context, TRUE );
922 if (status) raise_status( status, &rec );
923 restore_context( &context, sigcontext );
924 }
925
926
927 /**********************************************************************
928 * quit_handler
929 *
930 * Handler for SIGQUIT.
931 */
932 static void quit_handler( int signal, siginfo_t *siginfo, void *sigcontext )
933 {
934 abort_thread(0);
935 }
936
937
938 /**********************************************************************
939 * usr1_handler
940 *
941 * Handler for SIGUSR1, used to signal a thread that it got suspended.
942 */
943 static void usr1_handler( int signal, siginfo_t *siginfo, void *sigcontext )
944 {
945 CONTEXT context;
946
947 save_context( &context, sigcontext );
948 wait_suspend( &context );
949 restore_context( &context, sigcontext );
950 }
951
952
953 /***********************************************************************
954 * __wine_set_signal_handler (NTDLL.@)
955 */
956 int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
957 {
958 if (sig >= ARRAY_SIZE(handlers)) return -1;
959 if (handlers[sig] != NULL) return -2;
960 handlers[sig] = wsh;
961 return 0;
962 }
963
964
965 /**********************************************************************
966 * signal_alloc_thread
967 */
968 NTSTATUS signal_alloc_thread( TEB **teb )
969 {
970 static size_t sigstack_zero_bits;
971 SIZE_T size;
972 NTSTATUS status;
973
974 if (!sigstack_zero_bits)
975 {
976 size_t min_size = page_size;
977 /* find the first power of two not smaller than min_size */
978 while ((1u << sigstack_zero_bits) < min_size) sigstack_zero_bits++;
979 assert( sizeof(TEB) <= min_size );
980 }
981
982 size = 1 << sigstack_zero_bits;
983 *teb = NULL;
984 if (!(status = NtAllocateVirtualMemory( NtCurrentProcess(), (void **)teb, sigstack_zero_bits,
985 &size, MEM_COMMIT | MEM_TOP_DOWN, PAGE_READWRITE )))
986 {
987 (*teb)->Tib.Self = &(*teb)->Tib;
988 (*teb)->Tib.ExceptionList = (void *)~0UL;
989 }
990 return status;
991 }
992
993
994 /**********************************************************************
995 * signal_free_thread
996 */
997 void signal_free_thread( TEB *teb )
998 {
999 SIZE_T size = 0;
1000
1001 NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
1002 }
1003
1004
1005 /**********************************************************************
1006 * signal_init_thread
1007 */
1008 void signal_init_thread( TEB *teb )
1009 {
1010 static BOOL init_done;
1011
1012 if (!init_done)
1013 {
1014 pthread_key_create( &teb_key, NULL );
1015 init_done = TRUE;
1016 }
1017
1018 #if defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_8A__)
1019 /* Win32/ARM applications expect the TEB pointer to be in the TPIDRURW register. */
1020 __asm__ __volatile__( "mcr p15, 0, %0, c13, c0, 2" : : "r" (teb) );
1021 #endif
1022
1023 pthread_setspecific( teb_key, teb );
1024 }
1025
1026
1027 /**********************************************************************
1028 * signal_init_process
1029 */
1030 void signal_init_process(void)
1031 {
1032 struct sigaction sig_act;
1033
1034 sig_act.sa_mask = server_block_set;
1035 sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
1036
1037 sig_act.sa_sigaction = int_handler;
1038 if (sigaction( SIGINT, &sig_act, NULL ) == -1) goto error;
1039 sig_act.sa_sigaction = fpe_handler;
1040 if (sigaction( SIGFPE, &sig_act, NULL ) == -1) goto error;
1041 sig_act.sa_sigaction = abrt_handler;
1042 if (sigaction( SIGABRT, &sig_act, NULL ) == -1) goto error;
1043 sig_act.sa_sigaction = quit_handler;
1044 if (sigaction( SIGQUIT, &sig_act, NULL ) == -1) goto error;
1045 sig_act.sa_sigaction = usr1_handler;
1046 if (sigaction( SIGUSR1, &sig_act, NULL ) == -1) goto error;
1047
1048 sig_act.sa_sigaction = segv_handler;
1049 if (sigaction( SIGSEGV, &sig_act, NULL ) == -1) goto error;
1050 if (sigaction( SIGILL, &sig_act, NULL ) == -1) goto error;
1051 #ifdef SIGBUS
1052 if (sigaction( SIGBUS, &sig_act, NULL ) == -1) goto error;
1053 #endif
1054
1055 #ifdef SIGTRAP
1056 sig_act.sa_sigaction = trap_handler;
1057 if (sigaction( SIGTRAP, &sig_act, NULL ) == -1) goto error;
1058 #endif
1059 return;
1060
1061 error:
1062 perror("sigaction");
1063 exit(1);
1064 }
1065
1066
1067 /**********************************************************************
1068 * RtlAddFunctionTable (NTDLL.@)
1069 */
1070 BOOLEAN CDECL RtlAddFunctionTable( RUNTIME_FUNCTION *table, DWORD count, DWORD addr )
1071 {
1072 FIXME( "%p %u %x: stub\n", table, count, addr );
1073 return TRUE;
1074 }
1075
1076 /**********************************************************************
1077 * RtlInstallFunctionTableCallback (NTDLL.@)
1078 */
1079 BOOLEAN CDECL RtlInstallFunctionTableCallback( DWORD table, DWORD base, DWORD length,
1080 PGET_RUNTIME_FUNCTION_CALLBACK callback, PVOID context, PCWSTR dll )
1081 {
1082 FIXME( "%x %x %d %p %p %s: stub\n", table, base, length, callback, context, wine_dbgstr_w(dll) );
1083 return TRUE;
1084 }
1085
1086 /*************************************************************************
1087 * RtlAddGrowableFunctionTable (NTDLL.@)
1088 */
1089 DWORD WINAPI RtlAddGrowableFunctionTable( void **table, RUNTIME_FUNCTION *functions, DWORD count, DWORD max_count,
1090 ULONG_PTR base, ULONG_PTR end )
1091 {
1092 FIXME( "(%p, %p, %d, %d, %ld, %ld) stub!\n", table, functions, count, max_count, base, end );
1093 if (table) *table = NULL;
1094 return STATUS_SUCCESS;
1095 }
1096
1097 /*************************************************************************
1098 * RtlGrowFunctionTable (NTDLL.@)
1099 */
1100 void WINAPI RtlGrowFunctionTable( void *table, DWORD count )
1101 {
1102 FIXME( "(%p, %d) stub!\n", table, count );
1103 }
1104
1105 /*************************************************************************
1106 * RtlDeleteGrowableFunctionTable (NTDLL.@)
1107 */
1108 void WINAPI RtlDeleteGrowableFunctionTable( void *table )
1109 {
1110 FIXME( "(%p) stub!\n", table );
1111 }
1112
1113 /**********************************************************************
1114 * RtlDeleteFunctionTable (NTDLL.@)
1115 */
1116 BOOLEAN CDECL RtlDeleteFunctionTable( RUNTIME_FUNCTION *table )
1117 {
1118 FIXME( "%p: stub\n", table );
1119 return TRUE;
1120 }
1121
1122 /**********************************************************************
1123 * find_function_info
1124 */
1125 static RUNTIME_FUNCTION *find_function_info( ULONG_PTR pc, HMODULE module,
1126 RUNTIME_FUNCTION *func, ULONG size )
1127 {
1128 int min = 0;
1129 int max = size/sizeof(*func) - 1;
1130
1131 while (min <= max)
1132 {
1133 int pos = (min + max) / 2;
1134 DWORD begin = (func[pos].BeginAddress & ~1), end;
1135 if (func[pos].u.s.Flag)
1136 end = begin + func[pos].u.s.FunctionLength * 2;
1137 else
1138 {
1139 struct UNWIND_INFO *info;
1140 info = (struct UNWIND_INFO *)((char *)module + func[pos].u.UnwindData);
1141 end = begin + info->function_length * 2;
1142 }
1143
1144 if ((char *)pc < (char *)module + begin) max = pos - 1;
1145 else if ((char *)pc >= (char *)module + end) min = pos + 1;
1146 else return func + pos;
1147 }
1148 return NULL;
1149 }
1150
1151 /**********************************************************************
1152 * RtlLookupFunctionEntry (NTDLL.@)
1153 */
1154 PRUNTIME_FUNCTION WINAPI RtlLookupFunctionEntry( ULONG_PTR pc, DWORD *base,
1155 UNWIND_HISTORY_TABLE *table )
1156 {
1157 LDR_MODULE *module;
1158 RUNTIME_FUNCTION *func;
1159 ULONG size;
1160
1161 /* FIXME: should use the history table to make things faster */
1162
1163 if (LdrFindEntryForAddress( (void *)pc, &module ))
1164 {
1165 WARN( "module not found for %lx\n", pc );
1166 return NULL;
1167 }
1168 if (!(func = RtlImageDirectoryEntryToData( module->BaseAddress, TRUE,
1169 IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size )))
1170 {
1171 WARN( "no exception table found in module %p pc %lx\n", module->BaseAddress, pc );
1172 return NULL;
1173 }
1174 func = find_function_info( pc, module->BaseAddress, func, size );
1175 if (func) *base = (DWORD)module->BaseAddress;
1176 return func;
1177 }
1178
1179 /***********************************************************************
1180 * RtlUnwind (NTDLL.@)
1181 */
1182 void WINAPI RtlUnwind( void *endframe, void *target_ip, EXCEPTION_RECORD *rec, void *retval )
1183 {
1184 CONTEXT context;
1185 EXCEPTION_RECORD record;
1186 EXCEPTION_REGISTRATION_RECORD *frame, *dispatch;
1187 DWORD res;
1188
1189 RtlCaptureContext( &context );
1190 context.R0 = (DWORD)retval;
1191
1192 /* build an exception record, if we do not have one */
1193 if (!rec)
1194 {
1195 record.ExceptionCode = STATUS_UNWIND;
1196 record.ExceptionFlags = 0;
1197 record.ExceptionRecord = NULL;
1198 record.ExceptionAddress = (void *)context.Pc;
1199 record.NumberParameters = 0;
1200 rec = &record;
1201 }
1202
1203 rec->ExceptionFlags |= EH_UNWINDING | (endframe ? 0 : EH_EXIT_UNWIND);
1204
1205 TRACE( "code=%x flags=%x\n", rec->ExceptionCode, rec->ExceptionFlags );
1206
1207 /* get chain of exception frames */
1208 frame = NtCurrentTeb()->Tib.ExceptionList;
1209 while ((frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL) && (frame != endframe))
1210 {
1211 /* Check frame address */
1212 if (endframe && ((void*)frame > endframe))
1213 raise_status( STATUS_INVALID_UNWIND_TARGET, rec );
1214
1215 if (!is_valid_frame( frame )) raise_status( STATUS_BAD_STACK, rec );
1216
1217 /* Call handler */
1218 TRACE( "calling handler at %p code=%x flags=%x\n",
1219 frame->Handler, rec->ExceptionCode, rec->ExceptionFlags );
1220 res = frame->Handler(rec, frame, &context, &dispatch);
1221 TRACE( "handler at %p returned %x\n", frame->Handler, res );
1222
1223 switch(res)
1224 {
1225 case ExceptionContinueSearch:
1226 break;
1227 case ExceptionCollidedUnwind:
1228 frame = dispatch;
1229 break;
1230 default:
1231 raise_status( STATUS_INVALID_DISPOSITION, rec );
1232 break;
1233 }
1234 frame = __wine_pop_frame( frame );
1235 }
1236 }
1237
1238 /*******************************************************************
1239 * NtRaiseException (NTDLL.@)
1240 */
1241 NTSTATUS WINAPI NtRaiseException( EXCEPTION_RECORD *rec, CONTEXT *context, BOOL first_chance )
1242 {
1243 NTSTATUS status = raise_exception( rec, context, first_chance );
1244 if (status == STATUS_SUCCESS) NtSetContextThread( GetCurrentThread(), context );
1245 return status;
1246 }
1247
1248 /***********************************************************************
1249 * RtlRaiseException (NTDLL.@)
1250 */
1251 void WINAPI RtlRaiseException( EXCEPTION_RECORD *rec )
1252 {
1253 CONTEXT context;
1254 NTSTATUS status;
1255
1256 RtlCaptureContext( &context );
1257 rec->ExceptionAddress = (LPVOID)context.Pc;
1258 status = raise_exception( rec, &context, TRUE );
1259 if (status) raise_status( status, rec );
1260 }
1261
1262 /*************************************************************************
1263 * RtlCaptureStackBackTrace (NTDLL.@)
1264 */
1265 USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
1266 {
1267 FIXME( "(%d, %d, %p, %p) stub!\n", skip, count, buffer, hash );
1268 return 0;
1269 }
1270
1271 /***********************************************************************
1272 * call_thread_entry_point
1273 */
1274 static void call_thread_entry_point( LPTHREAD_START_ROUTINE entry, void *arg )
1275 {
1276 __TRY
1277 {
1278 TRACE_(relay)( "\1Starting thread proc %p (arg=%p)\n", entry, arg );
1279 RtlExitUserThread( entry( arg ));
1280 }
1281 __EXCEPT(call_unhandled_exception_filter)
1282 {
1283 NtTerminateThread( GetCurrentThread(), GetExceptionCode() );
1284 }
1285 __ENDTRY
1286 abort(); /* should not be reached */
1287 }
1288
1289 extern void DECLSPEC_NORETURN start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend,
1290 void *relay, TEB *teb );
1291 __ASM_GLOBAL_FUNC( start_thread,
1292 ".arm\n\t"
1293 "push {r4-r12,lr}\n\t"
1294 /* store exit frame */
1295 "ldr r4, [sp, #40]\n\t" /* teb */
1296 "str sp, [r4, #0x1d4]\n\t" /* teb->SystemReserved2 */
1297 /* switch to thread stack */
1298 "ldr r4, [r4, #4]\n\t" /* teb->Tib.StackBase */
1299 "sub sp, r4, #0x1000\n\t"
1300 /* attach dlls */
1301 "bl " __ASM_NAME("attach_thread") "\n\t"
1302 "mov sp, r0\n\t"
1303 /* clear the stack */
1304 "and r0, #~0xff0\n\t" /* round down to page size */
1305 "bl " __ASM_NAME("virtual_clear_thread_stack") "\n\t"
1306 /* switch to the initial context */
1307 "mov r0, sp\n\t"
1308 "b " __ASM_NAME("set_cpu_context") )
1309
1310 extern void DECLSPEC_NORETURN call_thread_exit_func( int status, void (*func)(int), TEB *teb );
1311 __ASM_GLOBAL_FUNC( call_thread_exit_func,
1312 ".arm\n\t"
1313 "ldr r3, [r2, #0x1d4]\n\t" /* teb->SystemReserved2 */
1314 "mov ip, #0\n\t"
1315 "str ip, [r2, #0x1d4]\n\t"
1316 "cmp r3, ip\n\t"
1317 "movne sp, r3\n\t"
1318 "blx r1" )
1319
1320 /***********************************************************************
1321 * init_thread_context
1322 */
1323 static void init_thread_context( CONTEXT *context, LPTHREAD_START_ROUTINE entry, void *arg, void *relay )
1324 {
1325 context->R0 = (DWORD)entry;
1326 context->R1 = (DWORD)arg;
1327 context->Sp = (DWORD)NtCurrentTeb()->Tib.StackBase;
1328 context->Pc = (DWORD)relay;
1329 }
1330
1331
1332 /***********************************************************************
1333 * attach_thread
1334 */
1335 PCONTEXT DECLSPEC_HIDDEN attach_thread( LPTHREAD_START_ROUTINE entry, void *arg,
1336 BOOL suspend, void *relay )
1337 {
1338 CONTEXT *ctx;
1339
1340 if (suspend)
1341 {
1342 CONTEXT context = { CONTEXT_ALL };
1343
1344 init_thread_context( &context, entry, arg, relay );
1345 wait_suspend( &context );
1346 ctx = (CONTEXT *)((ULONG_PTR)context.Sp & ~15) - 1;
1347 *ctx = context;
1348 }
1349 else
1350 {
1351 ctx = (CONTEXT *)NtCurrentTeb()->Tib.StackBase - 1;
1352 init_thread_context( ctx, entry, arg, relay );
1353 }
1354 ctx->ContextFlags = CONTEXT_FULL;
1355 LdrInitializeThunk( ctx, (void **)&ctx->R0, 0, 0 );
1356 return ctx;
1357 }
1358
1359
1360 /***********************************************************************
1361 * signal_start_thread
1362 *
1363 * Thread startup sequence:
1364 * signal_start_thread()
1365 * -> thread_startup()
1366 * -> call_thread_entry_point()
1367 */
1368 void signal_start_thread( LPTHREAD_START_ROUTINE entry, void *arg, BOOL suspend )
1369 {
1370 start_thread( entry, arg, suspend, call_thread_entry_point, NtCurrentTeb() );
1371 }
1372
1373 /**********************************************************************
1374 * signal_start_process
1375 *
1376 * Process startup sequence:
1377 * signal_start_process()
1378 * -> thread_startup()
1379 * -> kernel32_start_process()
1380 */
1381 void signal_start_process( LPTHREAD_START_ROUTINE entry, BOOL suspend )
1382 {
1383 start_thread( entry, NtCurrentTeb()->Peb, suspend, kernel32_start_process, NtCurrentTeb() );
1384 }
1385
1386 /***********************************************************************
1387 * signal_exit_thread
1388 */
1389 void signal_exit_thread( int status )
1390 {
1391 call_thread_exit_func( status, exit_thread, NtCurrentTeb() );
1392 }
1393
1394 /***********************************************************************
1395 * signal_exit_process
1396 */
1397 void signal_exit_process( int status )
1398 {
1399 call_thread_exit_func( status, exit, NtCurrentTeb() );
1400 }
1401
1402 /**********************************************************************
1403 * DbgBreakPoint (NTDLL.@)
1404 */
1405 void WINAPI DbgBreakPoint(void)
1406 {
1407 kill(getpid(), SIGTRAP);
1408 }
1409
1410 /**********************************************************************
1411 * DbgUserBreakPoint (NTDLL.@)
1412 */
1413 void WINAPI DbgUserBreakPoint(void)
1414 {
1415 kill(getpid(), SIGTRAP);
1416 }
1417
1418 /**********************************************************************
1419 * NtCurrentTeb (NTDLL.@)
1420 */
1421 TEB * WINAPI NtCurrentTeb(void)
1422 {
1423 return pthread_getspecific( teb_key );
1424 }
1425
1426 #endif /* __arm__ */
Windows API implementation