bsd/sys/signal.h

   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
 160 union 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
 171 struct 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
 182 union 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
 190 union 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
 196 union 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
 204 struct 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
 212 struct 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
 220 struct 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
 230 typedef 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
 245 typedef 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
 258 typedef 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
 271 typedef 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
 284 void siginfo_user_to_user32(user_siginfo_t *, user32_siginfo_t *);
 285 void 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 */
 367 union __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 */
 374 struct  __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  */
 384 struct  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
 393 union __user32_sigaction_u {
 394         user32_addr_t __sa_handler;
 395         user32_addr_t __sa_sigaction;
 396 };
 397
 398 struct  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
 404 struct  __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
 411 union __user64_sigaction_u {
 412         user64_addr_t   __sa_handler;
 413         user64_addr_t   __sa_sigaction;
 414 };
 415
 416 struct  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
 422 struct  __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
 429 union __kern_sigaction_u {
 430         user_addr_t     __sa_handler;
 431         user_addr_t     __sa_sigaction;
 432 };
 433
 434 struct  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
 440 struct  __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)
 500 typedef 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
 508 struct  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
 514 struct  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
 520 struct  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  */
 538 struct  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  */
 557 struct  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
 603     void(*signal(int, void (*)(int)))(int);
 604 __END_DECLS
 605 #endif  /* !_SYS_SIGNAL_H_ */