1/*
2 * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
29/*
30 * Copyright (c) 1982, 1986, 1989, 1991, 1993
31 * The Regents of the University of California. All rights reserved.
32 * (c) UNIX System Laboratories, Inc.
33 * All or some portions of this file are derived from material licensed
34 * to the University of California by American Telephone and Telegraph
35 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
36 * the permission of UNIX System Laboratories, Inc.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. All advertising materials mentioning features or use of this software
47 * must display the following acknowledgement:
48 * This product includes software developed by the University of
49 * California, Berkeley and its contributors.
50 * 4. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * SUCH DAMAGE.
65 *
66 * @(#)signal.h 8.2 (Berkeley) 1/21/94
67 */
68
69#ifndef _SYS_SIGNAL_H_
70#define _SYS_SIGNAL_H_
71
72#include <sys/cdefs.h>
73#include <sys/appleapiopts.h>
74#include <Availability.h>
75
76#define __DARWIN_NSIG 32 /* counting 0; could be 33 (mask is 1-32) */
77
78#if !defined(_ANSI_SOURCE) && (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
79#define NSIG __DARWIN_NSIG
80#endif
81
82#include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */
83
84#define SIGHUP 1 /* hangup */
85#define SIGINT 2 /* interrupt */
86#define SIGQUIT 3 /* quit */
87#define SIGILL 4 /* illegal instruction (not reset when caught) */
88#define SIGTRAP 5 /* trace trap (not reset when caught) */
89#define SIGABRT 6 /* abort() */
90#if (defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE))
91#define SIGPOLL 7 /* pollable event ([XSR] generated, not supported) */
92#else /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
93#define SIGIOT SIGABRT /* compatibility */
94#define SIGEMT 7 /* EMT instruction */
95#endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
96#define SIGFPE 8 /* floating point exception */
97#define SIGKILL 9 /* kill (cannot be caught or ignored) */
98#define SIGBUS 10 /* bus error */
99#define SIGSEGV 11 /* segmentation violation */
100#define SIGSYS 12 /* bad argument to system call */
101#define SIGPIPE 13 /* write on a pipe with no one to read it */
102#define SIGALRM 14 /* alarm clock */
103#define SIGTERM 15 /* software termination signal from kill */
104#define SIGURG 16 /* urgent condition on IO channel */
105#define SIGSTOP 17 /* sendable stop signal not from tty */
106#define SIGTSTP 18 /* stop signal from tty */
107#define SIGCONT 19 /* continue a stopped process */
108#define SIGCHLD 20 /* to parent on child stop or exit */
109#define SIGTTIN 21 /* to readers pgrp upon background tty read */
110#define SIGTTOU 22 /* like TTIN for output if (tp->t_local&LTOSTOP) */
111#if (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
112#define SIGIO 23 /* input/output possible signal */
113#endif
114#define SIGXCPU 24 /* exceeded CPU time limit */
115#define SIGXFSZ 25 /* exceeded file size limit */
116#define SIGVTALRM 26 /* virtual time alarm */
117#define SIGPROF 27 /* profiling time alarm */
118#if (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
119#define SIGWINCH 28 /* window size changes */
120#define SIGINFO 29 /* information request */
121#endif
122#define SIGUSR1 30 /* user defined signal 1 */
123#define SIGUSR2 31 /* user defined signal 2 */
124
125#if defined(_ANSI_SOURCE) || __DARWIN_UNIX03 || defined(__cplusplus)
126/*
127 * Language spec sez we must list exactly one parameter, even though we
128 * actually supply three. Ugh!
129 * SIG_HOLD is chosen to avoid KERN_SIG_* values in <sys/signalvar.h>
130 */
131#define SIG_DFL (void (*)(int))0
132#define SIG_IGN (void (*)(int))1
133#define SIG_HOLD (void (*)(int))5
134#define SIG_ERR ((void (*)(int))-1)
135#else
136/* DO NOT REMOVE THE COMMENTED OUT int: fixincludes needs to see them */
137#define SIG_DFL (void (*)( /*int*/ ))0
138#define SIG_IGN (void (*)( /*int*/ ))1
139#define SIG_HOLD (void (*)( /*int*/ ))5
140#define SIG_ERR ((void (*)( /*int*/ ))-1)
141#endif
142
143#ifndef _ANSI_SOURCE
144#include <sys/_types.h>
145
146#include <machine/_mcontext.h>
147
148#ifndef KERNEL
149#include <sys/_pthread/_pthread_attr_t.h>
150#endif /* KERNEL */
151
152#include <sys/_types/_sigaltstack.h>
153#include <sys/_types/_ucontext.h>
154
155#include <sys/_types/_pid_t.h>
156#include <sys/_types/_sigset_t.h>
157#include <sys/_types/_size_t.h>
158#include <sys/_types/_uid_t.h>
159
160union sigval {
161 /* Members as suggested by Annex C of POSIX 1003.1b. */
162 int sival_int;
163 void *sival_ptr;
164};
165
166#define SIGEV_NONE 0 /* No async notification */
167#define SIGEV_SIGNAL 1 /* aio - completion notification */
168#define SIGEV_THREAD 3 /* [NOTIMP] [RTS] call notification function */
169
170#ifndef KERNEL
171struct sigevent {
172 int sigev_notify; /* Notification type */
173 int sigev_signo; /* Signal number */
174 union sigval sigev_value; /* Signal value */
175 void (*sigev_notify_function)(union sigval); /* Notification function */
176 pthread_attr_t *sigev_notify_attributes; /* Notification attributes */
177};
178#endif /* KERNEL */
179
180#ifdef BSD_KERNEL_PRIVATE
181
182union user64_sigval {
183 struct {
184 uint32_t pad; /* assumes Motorola byte order */
185 int32_t sival_int;
186 } size_equivalent;
187 user64_addr_t sival_ptr;
188};
189
190union user32_sigval {
191 /* Members as suggested by Annex C of POSIX 1003.1b. */
192 int32_t sival_int;
193 user32_addr_t sival_ptr;
194};
195
196union user_sigval {
197 struct {
198 uint32_t pad; /* assumes Motorola byte order */
199 int32_t sival_int;
200 } size_equivalent;
201 user_addr_t sival_ptr;
202};
203
204struct user64_sigevent {
205 int sigev_notify; /* Notification type */
206 int sigev_signo; /* Signal number */
207 union user64_sigval sigev_value; /* Signal value */
208 user64_addr_t sigev_notify_function; /* Notify function */
209 user64_addr_t sigev_notify_attributes; /* Notify attributes */
210};
211
212struct user32_sigevent {
213 int sigev_notify; /* Notification type */
214 int sigev_signo; /* Signal number */
215 union user32_sigval sigev_value; /* Signal value */
216 user32_addr_t sigev_notify_function; /* Notify function */
217 user32_addr_t sigev_notify_attributes; /* Notify attributes */
218};
219
220struct user_sigevent {
221 int sigev_notify; /* Notification type */
222 int sigev_signo; /* Signal number */
223 union user_sigval sigev_value; /* Signal value */
224 user_addr_t sigev_notify_function; /* Notify function */
225 user_addr_t sigev_notify_attributes; /* Notify attributes */
226};
227
228#endif /* BSD_KERNEL_PRIVATE */
229
230typedef struct __siginfo {
231 int si_signo; /* signal number */
232 int si_errno; /* errno association */
233 int si_code; /* signal code */
234 pid_t si_pid; /* sending process */
235 uid_t si_uid; /* sender's ruid */
236 int si_status; /* exit value */
237 void *si_addr; /* faulting instruction */
238 union sigval si_value; /* signal value */
239 long si_band; /* band event for SIGPOLL */
240 unsigned long __pad[7]; /* Reserved for Future Use */
241} siginfo_t;
242
243#ifdef BSD_KERNEL_PRIVATE
244
245typedef struct user_siginfo {
246 int si_signo; /* signal number */
247 int si_errno; /* errno association */
248 int si_code; /* signal code */
249 pid_t si_pid; /* sending process */
250 uid_t si_uid; /* sender's ruid */
251 int si_status; /* exit value */
252 user_addr_t si_addr; /* faulting instruction (see below) */
253 union user_sigval si_value; /* signal value */
254 user_long_t si_band; /* band event for SIGPOLL */
255 user_ulong_t pad[7]; /* Reserved for Future Use */
256} user_siginfo_t;
257
258typedef struct user64_siginfo {
259 int si_signo; /* signal number */
260 int si_errno; /* errno association */
261 int si_code; /* signal code */
262 pid_t si_pid; /* sending process */
263 uid_t si_uid; /* sender's ruid */
264 int si_status; /* exit value */
265 user64_addr_t si_addr; /* faulting instruction (see below) */
266 union user64_sigval si_value; /* signal value */
267 user64_long_t si_band; /* band event for SIGPOLL */
268 user64_ulong_t __pad[7]; /* Reserved for Future Use */
269} user64_siginfo_t;
270
271typedef struct user32_siginfo {
272 int si_signo; /* signal number */
273 int si_errno; /* errno association */
274 int si_code; /* signal code */
275 pid_t si_pid; /* sending process */
276 uid_t si_uid; /* sender's ruid */
277 int si_status; /* exit value */
278 user32_addr_t si_addr; /* faulting instruction (see below) */
279 union user32_sigval si_value; /* signal value */
280 user32_long_t si_band; /* band event for SIGPOLL */
281 user32_ulong_t __pad[7]; /* Reserved for Future Use */
282} user32_siginfo_t;
283
284void siginfo_user_to_user32(user_siginfo_t *, user32_siginfo_t *);
285void siginfo_user_to_user64(user_siginfo_t *, user64_siginfo_t *);
286
287#endif /* BSD_KERNEL_PRIVATE */
288
289/*
290 * When the signal is SIGILL or SIGFPE, si_addr contains the address of
291 * the faulting instruction.
292 * When the signal is SIGSEGV or SIGBUS, si_addr contains the address of
293 * the faulting memory reference. Although for x86 there are cases of SIGSEGV
294 * for which si_addr cannot be determined and is NULL.
295 * If the signal is SIGCHLD, the si_pid field will contain the child process ID,
296 * si_status contains the exit value or signal and
297 * si_uid contains the real user ID of the process that sent the signal.
298 */
299
300/* Values for si_code */
301
302/* Codes for SIGILL */
303#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
304#define ILL_NOOP 0 /* if only I knew... */
305#endif
306#define ILL_ILLOPC 1 /* [XSI] illegal opcode */
307#define ILL_ILLTRP 2 /* [XSI] illegal trap */
308#define ILL_PRVOPC 3 /* [XSI] privileged opcode */
309#define ILL_ILLOPN 4 /* [XSI] illegal operand -NOTIMP */
310#define ILL_ILLADR 5 /* [XSI] illegal addressing mode -NOTIMP */
311#define ILL_PRVREG 6 /* [XSI] privileged register -NOTIMP */
312#define ILL_COPROC 7 /* [XSI] coprocessor error -NOTIMP */
313#define ILL_BADSTK 8 /* [XSI] internal stack error -NOTIMP */
314
315/* Codes for SIGFPE */
316#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
317#define FPE_NOOP 0 /* if only I knew... */
318#endif
319#define FPE_FLTDIV 1 /* [XSI] floating point divide by zero */
320#define FPE_FLTOVF 2 /* [XSI] floating point overflow */
321#define FPE_FLTUND 3 /* [XSI] floating point underflow */
322#define FPE_FLTRES 4 /* [XSI] floating point inexact result */
323#define FPE_FLTINV 5 /* [XSI] invalid floating point operation */
324#define FPE_FLTSUB 6 /* [XSI] subscript out of range -NOTIMP */
325#define FPE_INTDIV 7 /* [XSI] integer divide by zero */
326#define FPE_INTOVF 8 /* [XSI] integer overflow */
327
328/* Codes for SIGSEGV */
329#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
330#define SEGV_NOOP 0 /* if only I knew... */
331#endif
332#define SEGV_MAPERR 1 /* [XSI] address not mapped to object */
333#define SEGV_ACCERR 2 /* [XSI] invalid permission for mapped object */
334
335/* Codes for SIGBUS */
336#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
337#define BUS_NOOP 0 /* if only I knew... */
338#endif
339#define BUS_ADRALN 1 /* [XSI] Invalid address alignment */
340#define BUS_ADRERR 2 /* [XSI] Nonexistent physical address -NOTIMP */
341#define BUS_OBJERR 3 /* [XSI] Object-specific HW error - NOTIMP */
342
343/* Codes for SIGTRAP */
344#define TRAP_BRKPT 1 /* [XSI] Process breakpoint -NOTIMP */
345#define TRAP_TRACE 2 /* [XSI] Process trace trap -NOTIMP */
346
347/* Codes for SIGCHLD */
348#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
349#define CLD_NOOP 0 /* if only I knew... */
350#endif
351#define CLD_EXITED 1 /* [XSI] child has exited */
352#define CLD_KILLED 2 /* [XSI] terminated abnormally, no core file */
353#define CLD_DUMPED 3 /* [XSI] terminated abnormally, core file */
354#define CLD_TRAPPED 4 /* [XSI] traced child has trapped */
355#define CLD_STOPPED 5 /* [XSI] child has stopped */
356#define CLD_CONTINUED 6 /* [XSI] stopped child has continued */
357
358/* Codes for SIGPOLL */
359#define POLL_IN 1 /* [XSR] Data input available */
360#define POLL_OUT 2 /* [XSR] Output buffers available */
361#define POLL_MSG 3 /* [XSR] Input message available */
362#define POLL_ERR 4 /* [XSR] I/O error */
363#define POLL_PRI 5 /* [XSR] High priority input available */
364#define POLL_HUP 6 /* [XSR] Device disconnected */
365
366/* union for signal handlers */
367union __sigaction_u {
368 void (*__sa_handler)(int);
369 void (*__sa_sigaction)(int, struct __siginfo *,
370 void *);
371};
372
373/* Signal vector template for Kernel user boundary */
374struct __sigaction {
375 union __sigaction_u __sigaction_u; /* signal handler */
376 void (*sa_tramp)(void *, int, int, siginfo_t *, void *);
377 sigset_t sa_mask; /* signal mask to apply */
378 int sa_flags; /* see signal options below */
379};
380
381/*
382 * Signal vector "template" used in sigaction call.
383 */
384struct sigaction {
385 union __sigaction_u __sigaction_u; /* signal handler */
386 sigset_t sa_mask; /* signal mask to apply */
387 int sa_flags; /* see signal options below */
388};
389
390#ifdef BSD_KERNEL_PRIVATE
391#include <machine/types.h>
392
393union __user32_sigaction_u {
394 user32_addr_t __sa_handler;
395 user32_addr_t __sa_sigaction;
396};
397
398struct user32_sigaction {
399 union __user32_sigaction_u __sigaction_u; /* signal handler */
400 sigset_t sa_mask; /* signal mask to apply */
401 int sa_flags; /* see signal options below */
402};
403
404struct __user32_sigaction {
405 union __user32_sigaction_u __sigaction_u; /* signal handler */
406 user32_addr_t sa_tramp;
407 sigset_t sa_mask; /* signal mask to apply */
408 int sa_flags; /* see signal options below */
409};
410
411union __user64_sigaction_u {
412 user64_addr_t __sa_handler;
413 user64_addr_t __sa_sigaction;
414};
415
416struct user64_sigaction {
417 union __user64_sigaction_u __sigaction_u; /* signal handler */
418 sigset_t sa_mask; /* signal mask to apply */
419 int sa_flags; /* see signal options below */
420};
421
422struct __user64_sigaction {
423 union __user64_sigaction_u __sigaction_u; /* signal handler */
424 user64_addr_t sa_tramp; /* signal mask to apply */
425 sigset_t sa_mask; /* signal mask to apply */
426 int sa_flags; /* see signal options below */
427};
428
429union __kern_sigaction_u {
430 user_addr_t __sa_handler;
431 user_addr_t __sa_sigaction;
432};
433
434struct kern_sigaction {
435 union __kern_sigaction_u __sigaction_u; /* signal handler */
436 sigset_t sa_mask; /* signal mask to apply */
437 int sa_flags; /* see signal options below */
438};
439
440struct __kern_sigaction {
441 union __kern_sigaction_u __sigaction_u; /* signal handler */
442 user_addr_t sa_tramp; /* signal mask to apply */
443 sigset_t sa_mask; /* signal mask to apply */
444 int sa_flags; /* see signal options below */
445};
446
447#undef SIG_DFL
448#undef SIG_IGN
449#undef SIG_ERR
450#define SIG_DFL ((user_addr_t)0LL)
451#define SIG_IGN ((user_addr_t)1LL)
452#define SIG_ERR ((user_addr_t)-1LL)
453
454#endif /* BSD_KERNEL_PRIVATE */
455
456
457/* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */
458#define sa_handler __sigaction_u.__sa_handler
459#define sa_sigaction __sigaction_u.__sa_sigaction
460
461#define SA_ONSTACK 0x0001 /* take signal on signal stack */
462#define SA_RESTART 0x0002 /* restart system on signal return */
463#ifdef BSD_KERNEL_PRIVATE
464#define SA_DISABLE 0x0004 /* disable taking signals on alternate stack - for user_sigaltstack.ss_flags only */
465#endif /* BSD_KERNEL_PRIVATE */
466#define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */
467#define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */
468#define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */
469#define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */
470#define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */
471#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
472#define SA_USERTRAMP 0x0100 /* do not bounce off kernel's sigtramp */
473/* This will provide 64bit register set in a 32bit user address space */
474#define SA_64REGSET 0x0200 /* signal handler with SA_SIGINFO args with 64bit regs information */
475#endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
476#ifdef BSD_KERNEL_PRIVATE
477#define SA_VALIDATE_SIGRETURN_FROM_SIGTRAMP 0x0400 /* use token to validate sigreturn was called from matching sigtramp */
478#endif /* BSD_KERNEL_PRIVATE */
479
480/* the following are the only bits we support from user space, the
481 * rest are for kernel use only.
482 */
483#define SA_USERSPACE_MASK (SA_ONSTACK | SA_RESTART | SA_RESETHAND | SA_NOCLDSTOP | SA_NODEFER | SA_NOCLDWAIT | SA_SIGINFO)
484
485/*
486 * Flags for sigprocmask:
487 */
488#define SIG_BLOCK 1 /* block specified signal set */
489#define SIG_UNBLOCK 2 /* unblock specified signal set */
490#define SIG_SETMASK 3 /* set specified signal set */
491
492/* POSIX 1003.1b required values. */
493#define SI_USER 0x10001 /* [CX] signal from kill() */
494#define SI_QUEUE 0x10002 /* [CX] signal from sigqueue() */
495#define SI_TIMER 0x10003 /* [CX] timer expiration */
496#define SI_ASYNCIO 0x10004 /* [CX] aio request completion */
497#define SI_MESGQ 0x10005 /* [CX] from message arrival on empty queue */
498
499#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
500typedef void (*sig_t)(int); /* type of signal function */
501#endif
502
503/*
504 * Structure used in sigaltstack call.
505 */
506#ifdef BSD_KERNEL_PRIVATE
507
508struct user32_sigaltstack {
509 user32_addr_t ss_sp; /* signal stack base */
510 user32_size_t ss_size; /* signal stack length */
511 int ss_flags; /* SA_DISABLE and/or SA_ONSTACK */
512};
513
514struct user64_sigaltstack {
515 user64_addr_t ss_sp; /* signal stack base */
516 user64_size_t ss_size; /* signal stack length */
517 int ss_flags; /* SA_DISABLE and/or SA_ONSTACK */
518};
519
520struct kern_sigaltstack {
521 user_addr_t ss_sp; /* signal stack base */
522 user_size_t ss_size; /* signal stack length */
523 int ss_flags; /* SA_DISABLE and/or SA_ONSTACK */
524};
525
526#endif /* BSD_KERNEL_PRIVATE */
527
528#define SS_ONSTACK 0x0001 /* take signal on signal stack */
529#define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */
530#define MINSIGSTKSZ 32768 /* (32K)minimum allowable stack */
531#define SIGSTKSZ 131072 /* (128K)recommended stack size */
532
533#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
534/*
535 * 4.3 compatibility:
536 * Signal vector "template" used in sigvec call.
537 */
538struct sigvec {
539 void (*sv_handler)(int); /* signal handler */
540 int sv_mask; /* signal mask to apply */
541 int sv_flags; /* see signal options below */
542};
543
544#define SV_ONSTACK SA_ONSTACK
545#define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */
546#define SV_RESETHAND SA_RESETHAND
547#define SV_NODEFER SA_NODEFER
548#define SV_NOCLDSTOP SA_NOCLDSTOP
549#define SV_SIGINFO SA_SIGINFO
550
551#define sv_onstack sv_flags /* isn't compatibility wonderful! */
552#endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
553
554/*
555 * Structure used in sigstack call.
556 */
557struct sigstack {
558 char *ss_sp; /* signal stack pointer */
559 int ss_onstack; /* current status */
560};
561
562#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
563/*
564 * Macro for converting signal number to a mask suitable for
565 * sigblock().
566 */
567#define sigmask(m) (1 << ((m)-1))
568
569#ifdef KERNEL_PRIVATE
570/*
571 * signals delivered on a per-thread basis.
572 */
573#define threadmask (sigmask(SIGILL)|sigmask(SIGTRAP)|\
574 sigmask(SIGABRT)|sigmask(SIGEMT)|\
575 sigmask(SIGFPE)|sigmask(SIGBUS)|\
576 sigmask(SIGSEGV)|sigmask(SIGSYS)|\
577 sigmask(SIGPIPE)|sigmask(SIGKILL))
578
579#define workq_threadmask ((threadmask | sigcantmask | sigmask(SIGPROF)) & ~sigmask(SIGABRT))
580
581/*
582 * Signals carried across exec.
583 */
584#define execmask (sigmask(SIGHUP)|sigmask(SIGINT)|\
585 sigmask(SIGQUIT)|sigmask(SIGKILL)|\
586 sigmask(SIGTERM)|sigmask(SIGSTOP)|\
587 sigmask(SIGTSTP)|sigmask(SIGCONT)|\
588 sigmask(SIGTTIN)|sigmask(SIGTTOU)|\
589 sigmask(SIGUSR1)|sigmask(SIGUSR2))
590
591#endif /* KERNEL_PRIVATE */
592
593#define BADSIG SIG_ERR
594
595#endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
596#endif /* !_ANSI_SOURCE */
597
598/*
599 * For historical reasons; programs expect signal's return value to be
600 * defined by <sys/signal.h>.
601 */
602__BEGIN_DECLS
603void(*signal(int, void (*)(int)))(int);
604__END_DECLS
605#endif /* !_SYS_SIGNAL_H_ */
606