2 * Sparc signal handling routines
4 * Copyright 1999 Ulrich Weigand
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.
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.
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
24 #include "wine/port.h"
34 #include <sys/ucontext.h>
40 #include "wine/exception.h"
41 #include "ntdll_misc.h"
43 #include "wine/debug.h"
45 WINE_DEFAULT_DEBUG_CHANNEL(seh
);
47 #define HANDLER_DEF(name) void name( int __signal, struct siginfo *__siginfo, ucontext_t *__context )
48 #define HANDLER_CONTEXT (__context)
50 typedef int (*wine_signal_handler
)(unsigned int sig
);
52 static wine_signal_handler handlers
[256];
54 /***********************************************************************
57 static inline int dispatch_signal(unsigned int sig
)
59 if (handlers
[sig
] == NULL
) return 0;
60 return handlers
[sig
](sig
);
65 * FIXME: All this works only on Solaris for now
68 /**********************************************************************
71 static void save_context( CONTEXT
*context
, ucontext_t
*ucontext
)
73 /* Special registers */
74 context
->psr
= ucontext
->uc_mcontext
.gregs
[REG_PSR
];
75 context
->pc
= ucontext
->uc_mcontext
.gregs
[REG_PC
];
76 context
->npc
= ucontext
->uc_mcontext
.gregs
[REG_nPC
];
77 context
->y
= ucontext
->uc_mcontext
.gregs
[REG_Y
];
78 context
->wim
= 0; /* FIXME */
79 context
->tbr
= 0; /* FIXME */
81 /* Global registers */
82 context
->g0
= 0; /* always */
83 context
->g1
= ucontext
->uc_mcontext
.gregs
[REG_G1
];
84 context
->g2
= ucontext
->uc_mcontext
.gregs
[REG_G2
];
85 context
->g3
= ucontext
->uc_mcontext
.gregs
[REG_G3
];
86 context
->g4
= ucontext
->uc_mcontext
.gregs
[REG_G4
];
87 context
->g5
= ucontext
->uc_mcontext
.gregs
[REG_G5
];
88 context
->g6
= ucontext
->uc_mcontext
.gregs
[REG_G6
];
89 context
->g7
= ucontext
->uc_mcontext
.gregs
[REG_G7
];
91 /* Current 'out' registers */
92 context
->o0
= ucontext
->uc_mcontext
.gregs
[REG_O0
];
93 context
->o1
= ucontext
->uc_mcontext
.gregs
[REG_O1
];
94 context
->o2
= ucontext
->uc_mcontext
.gregs
[REG_O2
];
95 context
->o3
= ucontext
->uc_mcontext
.gregs
[REG_O3
];
96 context
->o4
= ucontext
->uc_mcontext
.gregs
[REG_O4
];
97 context
->o5
= ucontext
->uc_mcontext
.gregs
[REG_O5
];
98 context
->o6
= ucontext
->uc_mcontext
.gregs
[REG_O6
];
99 context
->o7
= ucontext
->uc_mcontext
.gregs
[REG_O7
];
101 /* FIXME: what if the current register window isn't saved? */
102 if ( ucontext
->uc_mcontext
.gwins
&& ucontext
->uc_mcontext
.gwins
->wbcnt
> 0 )
104 /* Current 'local' registers from first register window */
105 context
->l0
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_local
[0];
106 context
->l1
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_local
[1];
107 context
->l2
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_local
[2];
108 context
->l3
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_local
[3];
109 context
->l4
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_local
[4];
110 context
->l5
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_local
[5];
111 context
->l6
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_local
[6];
112 context
->l7
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_local
[7];
114 /* Current 'in' registers from first register window */
115 context
->i0
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_in
[0];
116 context
->i1
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_in
[1];
117 context
->i2
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_in
[2];
118 context
->i3
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_in
[3];
119 context
->i4
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_in
[4];
120 context
->i5
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_in
[5];
121 context
->i6
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_in
[6];
122 context
->i7
= ucontext
->uc_mcontext
.gwins
->wbuf
[0].rw_in
[7];
126 /**********************************************************************
129 static void restore_context( CONTEXT
*context
, ucontext_t
*ucontext
)
134 /**********************************************************************
137 static void save_fpu( CONTEXT
*context
, ucontext_t
*ucontext
)
142 /**********************************************************************
145 static void restore_fpu( CONTEXT
*context
, ucontext_t
*ucontext
)
151 /***********************************************************************
154 * Get the context of the current thread.
156 void get_cpu_context( CONTEXT
*context
)
158 FIXME("not implemented\n");
162 /***********************************************************************
165 * Set the new CPU context.
167 void set_cpu_context( const CONTEXT
*context
)
169 FIXME("not implemented\n");
173 /**********************************************************************
176 * Handler for SIGSEGV.
178 static void segv_handler( int signal
, siginfo_t
*info
, ucontext_t
*ucontext
)
180 EXCEPTION_RECORD rec
;
183 rec
.ExceptionCode
= EXCEPTION_ACCESS_VIOLATION
;
185 /* we want the page-fault case to be fast */
186 if ( info
->si_code
== SEGV_ACCERR
)
187 if (!(rec
.ExceptionCode
= virtual_handle_fault( info
->si_addr
, 0 ))) return;
189 save_context( &context
, ucontext
);
190 rec
.ExceptionRecord
= NULL
;
191 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
192 rec
.ExceptionAddress
= (LPVOID
)context
.pc
;
193 rec
.NumberParameters
= 2;
194 rec
.ExceptionInformation
[0] = 0; /* FIXME: read/write access ? */
195 rec
.ExceptionInformation
[1] = (ULONG_PTR
)info
->si_addr
;
197 __regs_RtlRaiseException( &rec
, &context
);
198 restore_context( &context
, ucontext
);
201 /**********************************************************************
204 * Handler for SIGBUS.
206 static void bus_handler( int signal
, siginfo_t
*info
, ucontext_t
*ucontext
)
208 EXCEPTION_RECORD rec
;
211 save_context( &context
, ucontext
);
212 rec
.ExceptionRecord
= NULL
;
213 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
214 rec
.ExceptionAddress
= (LPVOID
)context
.pc
;
215 rec
.NumberParameters
= 0;
217 if ( info
->si_code
== BUS_ADRALN
)
218 rec
.ExceptionCode
= EXCEPTION_DATATYPE_MISALIGNMENT
;
220 rec
.ExceptionCode
= EXCEPTION_ACCESS_VIOLATION
;
222 __regs_RtlRaiseException( &rec
, &context
);
223 restore_context( &context
, ucontext
);
226 /**********************************************************************
229 * Handler for SIGILL.
231 static void ill_handler( int signal
, siginfo_t
*info
, ucontext_t
*ucontext
)
233 EXCEPTION_RECORD rec
;
236 switch ( info
->si_code
)
243 rec
.ExceptionCode
= EXCEPTION_ILLEGAL_INSTRUCTION
;
248 rec
.ExceptionCode
= EXCEPTION_PRIV_INSTRUCTION
;
252 rec
.ExceptionCode
= EXCEPTION_STACK_OVERFLOW
;
256 save_context( &context
, ucontext
);
257 rec
.ExceptionRecord
= NULL
;
258 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
259 rec
.ExceptionAddress
= (LPVOID
)context
.pc
;
260 rec
.NumberParameters
= 0;
261 __regs_RtlRaiseException( &rec
, &context
);
262 restore_context( &context
, ucontext
);
266 /**********************************************************************
269 * Handler for SIGTRAP.
271 static void trap_handler( int signal
, siginfo_t
*info
, ucontext_t
*ucontext
)
273 EXCEPTION_RECORD rec
;
276 switch ( info
->si_code
)
279 rec
.ExceptionCode
= EXCEPTION_SINGLE_STEP
;
283 rec
.ExceptionCode
= EXCEPTION_BREAKPOINT
;
287 save_context( &context
, ucontext
);
288 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
289 rec
.ExceptionRecord
= NULL
;
290 rec
.ExceptionAddress
= (LPVOID
)context
.pc
;
291 rec
.NumberParameters
= 0;
292 __regs_RtlRaiseException( &rec
, &context
);
293 restore_context( &context
, ucontext
);
297 /**********************************************************************
300 * Handler for SIGFPE.
302 static void fpe_handler( int signal
, siginfo_t
*info
, ucontext_t
*ucontext
)
304 EXCEPTION_RECORD rec
;
307 switch ( info
->si_code
)
310 rec
.ExceptionCode
= EXCEPTION_ARRAY_BOUNDS_EXCEEDED
;
313 rec
.ExceptionCode
= EXCEPTION_INT_DIVIDE_BY_ZERO
;
316 rec
.ExceptionCode
= EXCEPTION_INT_OVERFLOW
;
319 rec
.ExceptionCode
= EXCEPTION_FLT_DIVIDE_BY_ZERO
;
322 rec
.ExceptionCode
= EXCEPTION_FLT_OVERFLOW
;
325 rec
.ExceptionCode
= EXCEPTION_FLT_UNDERFLOW
;
328 rec
.ExceptionCode
= EXCEPTION_FLT_INEXACT_RESULT
;
332 rec
.ExceptionCode
= EXCEPTION_FLT_INVALID_OPERATION
;
336 save_context( &context
, ucontext
);
337 save_fpu( &context
, ucontext
);
338 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
339 rec
.ExceptionRecord
= NULL
;
340 rec
.ExceptionAddress
= (LPVOID
)context
.pc
;
341 rec
.NumberParameters
= 0;
342 __regs_RtlRaiseException( &rec
, &context
);
343 restore_context( &context
, ucontext
);
344 restore_fpu( &context
, ucontext
);
348 /**********************************************************************
351 * Handler for SIGINT.
353 static void int_handler( int signal
, siginfo_t
*info
, ucontext_t
*ucontext
)
355 if (!dispatch_signal(SIGINT
))
357 EXCEPTION_RECORD rec
;
360 save_context( &context
, ucontext
);
361 rec
.ExceptionCode
= CONTROL_C_EXIT
;
362 rec
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
363 rec
.ExceptionRecord
= NULL
;
364 rec
.ExceptionAddress
= (LPVOID
)context
.pc
;
365 rec
.NumberParameters
= 0;
366 __regs_RtlRaiseException( &rec
, &context
);
367 restore_context( &context
, ucontext
);
371 /**********************************************************************
374 * Handler for SIGABRT.
376 static HANDLER_DEF(abrt_handler
)
378 EXCEPTION_RECORD rec
;
381 save_context( &context
, HANDLER_CONTEXT
);
382 rec
.ExceptionCode
= EXCEPTION_WINE_ASSERTION
;
383 rec
.ExceptionFlags
= EH_NONCONTINUABLE
;
384 rec
.ExceptionRecord
= NULL
;
385 rec
.ExceptionAddress
= (LPVOID
)context
.pc
;
386 rec
.NumberParameters
= 0;
387 __regs_RtlRaiseException( &rec
, &context
); /* Should never return.. */
388 restore_context( &context
, HANDLER_CONTEXT
);
392 /**********************************************************************
395 * Handler for SIGQUIT.
397 static HANDLER_DEF(quit_handler
)
399 server_abort_thread(0);
403 /**********************************************************************
406 * Handler for SIGUSR1, used to signal a thread that it got suspended.
408 static HANDLER_DEF(usr1_handler
)
412 save_context( &context
, HANDLER_CONTEXT
);
413 wait_suspend( &context
);
414 restore_context( &context
, HANDLER_CONTEXT
);
418 /**********************************************************************
419 * get_signal_stack_total_size
421 * Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
422 * Must be a power of two.
424 size_t get_signal_stack_total_size(void)
426 assert( sizeof(TEB
) <= getpagesize() );
427 return getpagesize(); /* this is just for the TEB, we don't need a signal stack */
431 /***********************************************************************
434 * Set a signal handler
436 static int set_handler( int sig
, void (*func
)() )
438 struct sigaction sig_act
;
440 sig_act
.sa_sigaction
= func
;
441 sig_act
.sa_mask
= server_block_set
;
442 sig_act
.sa_flags
= SA_SIGINFO
;
444 return sigaction( sig
, &sig_act
, NULL
);
448 /***********************************************************************
449 * __wine_set_signal_handler (NTDLL.@)
451 int __wine_set_signal_handler(unsigned int sig
, wine_signal_handler wsh
)
453 if (sig
> sizeof(handlers
) / sizeof(handlers
[0])) return -1;
454 if (handlers
[sig
] != NULL
) return -2;
460 /**********************************************************************
463 void signal_init_thread(void)
467 /**********************************************************************
468 * signal_init_process
470 void signal_init_process(void)
472 if (set_handler( SIGINT
, (void (*)())int_handler
) == -1) goto error
;
473 if (set_handler( SIGFPE
, (void (*)())fpe_handler
) == -1) goto error
;
474 if (set_handler( SIGSEGV
, (void (*)())segv_handler
) == -1) goto error
;
475 if (set_handler( SIGILL
, (void (*)())ill_handler
) == -1) goto error
;
476 if (set_handler( SIGBUS
, (void (*)())bus_handler
) == -1) goto error
;
477 if (set_handler( SIGTRAP
, (void (*)())trap_handler
) == -1) goto error
;
478 if (set_handler( SIGABRT
, (void (*)())abrt_handler
) == -1) goto error
;
479 if (set_handler( SIGQUIT
, (void (*)())quit_handler
) == -1) goto error
;
480 if (set_handler( SIGUSR1
, (void (*)())usr1_handler
) == -1) goto error
;
481 /* 'ta 6' tells the kernel to synthesize any unaligned accesses this
482 process makes, instead of just signalling an error and terminating
483 the process. wine-devel did not reach a conclusion on whether
484 this is correct, because that is what x86 does, or it is harmful
485 because it could obscure problems in user code */
486 asm("ta 6"); /* 6 == ST_FIX_ALIGN defined in sys/trap.h */
487 signal_init_thread();
496 /**********************************************************************
499 void __wine_enter_vm86( CONTEXT
*context
)
501 MESSAGE("vm86 mode not supported on this platform\n");
504 /**********************************************************************
505 * DbgBreakPoint (NTDLL.@)
507 void WINAPI
DbgBreakPoint(void)
509 kill(getpid(), SIGTRAP
);
512 /**********************************************************************
513 * DbgUserBreakPoint (NTDLL.@)
515 void WINAPI
DbgUserBreakPoint(void)
517 kill(getpid(), SIGTRAP
);
520 #endif /* __sparc__ */