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
  75 #define __DARWIN_NSIG   32      /* counting 0; could be 33 (mask is 1-32) */
  76
  77 #if !defined(_ANSI_SOURCE) && (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
  78 #define NSIG    __DARWIN_NSIG
  79 #endif
  80
  81 #include <machine/signal.h>     /* sigcontext; codes for SIGILL, SIGFPE */
  82
  83 #define SIGHUP  1       /* hangup */
  84 #define SIGINT  2       /* interrupt */
  85 #define SIGQUIT 3       /* quit */
  86 #define SIGILL  4       /* illegal instruction (not reset when caught) */
  87 #define SIGTRAP 5       /* trace trap (not reset when caught) */
  88 #define SIGABRT 6       /* abort() */
  89 #if  (defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE))
  90 #define SIGPOLL 7       /* pollable event ([XSR] generated, not supported) */
  91 #else   /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
  92 #define SIGIOT  SIGABRT /* compatibility */
  93 #define SIGEMT  7       /* EMT instruction */
  94 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
  95 #define SIGFPE  8       /* floating point exception */
  96 #define SIGKILL 9       /* kill (cannot be caught or ignored) */
  97 #define SIGBUS  10      /* bus error */
  98 #define SIGSEGV 11      /* segmentation violation */
  99 #define SIGSYS  12      /* bad argument to system call */
 100 #define SIGPIPE 13      /* write on a pipe with no one to read it */
 101 #define SIGALRM 14      /* alarm clock */
 102 #define SIGTERM 15      /* software termination signal from kill */
 103 #define SIGURG  16      /* urgent condition on IO channel */
 104 #define SIGSTOP 17      /* sendable stop signal not from tty */
 105 #define SIGTSTP 18      /* stop signal from tty */
 106 #define SIGCONT 19      /* continue a stopped process */
 107 #define SIGCHLD 20      /* to parent on child stop or exit */
 108 #define SIGTTIN 21      /* to readers pgrp upon background tty read */
 109 #define SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */
 110 #if  (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
 111 #define SIGIO   23      /* input/output possible signal */
 112 #endif
 113 #define SIGXCPU 24      /* exceeded CPU time limit */
 114 #define SIGXFSZ 25      /* exceeded file size limit */
 115 #define SIGVTALRM 26    /* virtual time alarm */
 116 #define SIGPROF 27      /* profiling time alarm */
 117 #if  (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
 118 #define SIGWINCH 28     /* window size changes */
 119 #define SIGINFO 29      /* information request */
 120 #endif
 121 #define SIGUSR1 30      /* user defined signal 1 */
 122 #define SIGUSR2 31      /* user defined signal 2 */
 123
 124 #if defined(_ANSI_SOURCE) || __DARWIN_UNIX03 || defined(__cplusplus)
 125 /*
 126  * Language spec sez we must list exactly one parameter, even though we
 127  * actually supply three.  Ugh!
 128  * SIG_HOLD is chosen to avoid KERN_SIG_* values in <sys/signalvar.h>
 129  */
 130 #define SIG_DFL         (void (*)(int))0
 131 #define SIG_IGN         (void (*)(int))1
 132 #define SIG_HOLD        (void (*)(int))5
 133 #define SIG_ERR         ((void (*)(int))-1)
 134 #else
 135 /* DO NOT REMOVE THE COMMENTED OUT int: fixincludes needs to see them */
 136 #define SIG_DFL         (void (*)(/*int*/))0
 137 #define SIG_IGN         (void (*)(/*int*/))1
 138 #define SIG_HOLD        (void (*)(/*int*/))5
 139 #define SIG_ERR         ((void (*)(/*int*/))-1)
 140 #endif
 141
 142 #ifndef _ANSI_SOURCE
 143 #include <sys/_types.h>
 144
 145 #define __need_mcontext_t
 146 #define __need_stack_t
 147 #define __need_ucontext_t
 148 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 149 #if defined(__ppc__) || defined(__ppc64__)
 150 #define __need_mcontext64_t
 151 #define __need_ucontext64_t
 152 #endif /* __ppc__  || __ppc64__ */
 153 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 154 #include <sys/_structs.h>
 155
 156 #ifndef _PID_T
 157 #define _PID_T
 158 typedef __darwin_pid_t                  pid_t;
 159 #endif
 160
 161 #ifndef _PTHREAD_ATTR_T
 162 #define _PTHREAD_ATTR_T
 163 typedef __darwin_pthread_attr_t         pthread_attr_t;
 164 #endif
 165
 166 #ifndef _SIGSET_T
 167 #define _SIGSET_T
 168 typedef __darwin_sigset_t               sigset_t;
 169 #endif
 170
 171 #ifndef _SIZE_T
 172 #define _SIZE_T
 173 typedef __darwin_size_t                 size_t;
 174 #endif
 175
 176 #ifndef _UID_T
 177 #define _UID_T
 178 typedef __darwin_uid_t                  uid_t;
 179 #endif
 180
 181 union sigval {
 182         /* Members as suggested by Annex C of POSIX 1003.1b. */
 183         int     sival_int;
 184         void    *sival_ptr;
 185 };
 186
 187 #define SIGEV_NONE      0       /* No async notification */
 188 #define SIGEV_SIGNAL    1       /* aio - completion notification */
 189 #define SIGEV_THREAD    3       /* [NOTIMP] [RTS] call notification function */
 190
 191 struct sigevent {
 192         int                             sigev_notify;                           /* Notification type */
 193         int                             sigev_signo;                            /* Signal number */
 194         union sigval    sigev_value;                            /* Signal value */
 195         void                    (*sigev_notify_function)(union sigval);   /* Notification function */
 196         pthread_attr_t  *sigev_notify_attributes;       /* Notification attributes */
 197 };
 198
 199 #ifdef BSD_KERNEL_PRIVATE
 200
 201 union user64_sigval {
 202         struct {
 203                 uint32_t                pad;    /* assumes Motorola byte order */
 204                 int32_t                 sival_int;
 205         } size_equivalent;
 206         user64_addr_t   sival_ptr;
 207 };
 208
 209 union user32_sigval {
 210         /* Members as suggested by Annex C of POSIX 1003.1b. */
 211         int32_t sival_int;
 212         user32_addr_t sival_ptr;
 213 };
 214
 215 union user_sigval {
 216         struct {
 217                 uint32_t                pad;    /* assumes Motorola byte order */
 218                 int32_t                 sival_int;
 219         } size_equivalent;
 220         user_addr_t sival_ptr;
 221 };
 222
 223 struct user64_sigevent {
 224         int             sigev_notify;                   /* Notification type */
 225         int             sigev_signo;                    /* Signal number */
 226         union user64_sigval sigev_value;                        /* Signal value */
 227         user64_addr_t   sigev_notify_function;          /* Notify function */
 228         user64_addr_t   sigev_notify_attributes;        /* Notify attributes */
 229 };
 230
 231 struct user32_sigevent {
 232         int             sigev_notify;                   /* Notification type */
 233         int             sigev_signo;                    /* Signal number */
 234         union user32_sigval sigev_value;                        /* Signal value */
 235         user32_addr_t   sigev_notify_function;          /* Notify function */
 236         user32_addr_t   sigev_notify_attributes;        /* Notify attributes */
 237 };
 238
 239 struct user_sigevent {
 240         int             sigev_notify;                   /* Notification type */
 241         int             sigev_signo;                    /* Signal number */
 242         union user_sigval sigev_value;                  /* Signal value */
 243         user_addr_t     sigev_notify_function;          /* Notify function */
 244         user_addr_t     sigev_notify_attributes;        /* Notify attributes */
 245 };
 246
 247 #endif  /* BSD_KERNEL_PRIVATE */
 248
 249 typedef struct __siginfo {
 250         int     si_signo;               /* signal number */
 251         int     si_errno;               /* errno association */
 252         int     si_code;                /* signal code */
 253         pid_t   si_pid;                 /* sending process */
 254         uid_t   si_uid;                 /* sender's ruid */
 255         int     si_status;              /* exit value */
 256         void    *si_addr;               /* faulting instruction */
 257         union sigval si_value;          /* signal value */
 258         long    si_band;                /* band event for SIGPOLL */
 259         unsigned long   __pad[7];       /* Reserved for Future Use */
 260 } siginfo_t;
 261
 262 #ifdef BSD_KERNEL_PRIVATE
 263
 264 typedef struct user_siginfo {
 265         int             si_signo;       /* signal number */
 266         int             si_errno;       /* errno association */
 267         int             si_code;        /* signal code */
 268         pid_t           si_pid;         /* sending process */
 269         uid_t           si_uid;         /* sender's ruid */
 270         int             si_status;      /* exit value */
 271         user_addr_t     si_addr;        /* faulting instruction (see below) */
 272         union user_sigval si_value;     /* signal value */
 273         user_long_t     si_band;        /* band event for SIGPOLL */
 274         user_ulong_t    pad[7];         /* Reserved for Future Use */
 275 } user_siginfo_t;
 276
 277 typedef struct user64_siginfo {
 278         int             si_signo;       /* signal number */
 279         int             si_errno;       /* errno association */
 280         int             si_code;        /* signal code */
 281         pid_t           si_pid;         /* sending process */
 282         uid_t           si_uid;         /* sender's ruid */
 283         int             si_status;      /* exit value */
 284         user64_addr_t   si_addr;        /* faulting instruction (see below) */
 285         union user64_sigval si_value;   /* signal value */
 286         user64_long_t   si_band;        /* band event for SIGPOLL */
 287         user64_ulong_t  __pad[7];               /* Reserved for Future Use */
 288 } user64_siginfo_t;
 289
 290 typedef struct user32_siginfo {
 291         int             si_signo;       /* signal number */
 292         int             si_errno;       /* errno association */
 293         int             si_code;        /* signal code */
 294         pid_t           si_pid;         /* sending process */
 295         uid_t           si_uid;         /* sender's ruid */
 296         int             si_status;      /* exit value */
 297         user32_addr_t   si_addr;        /* faulting instruction (see below) */
 298         union user32_sigval     si_value;       /* signal value */
 299         user32_long_t   si_band;        /* band event for SIGPOLL */
 300         user32_ulong_t  __pad[7];               /* Reserved for Future Use */
 301 } user32_siginfo_t;
 302
 303 #endif  /* BSD_KERNEL_PRIVATE */
 304
 305 /*
 306  * When the signal is SIGILL or SIGFPE, si_addr contains the address of
 307  * the faulting instruction.
 308  * When the signal is SIGSEGV or SIGBUS, si_addr contains the address of
 309  * the faulting memory reference. Although for x86 there are cases of SIGSEGV
 310  * for which si_addr cannot be determined and is NULL.
 311  * If the signal is SIGCHLD, the si_pid field will contain the child process ID,
 312  *  si_status contains the exit value or signal and
 313  *  si_uid contains the real user ID of the process that sent the signal.
 314  */
 315
 316 /* Values for si_code */
 317
 318 /* Codes for SIGILL */
 319 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 320 #define ILL_NOOP        0       /* if only I knew... */
 321 #endif
 322 #define ILL_ILLOPC      1       /* [XSI] illegal opcode */
 323 #define ILL_ILLTRP      2       /* [XSI] illegal trap */
 324 #define ILL_PRVOPC      3       /* [XSI] privileged opcode */
 325 #define ILL_ILLOPN      4       /* [XSI] illegal operand -NOTIMP */
 326 #define ILL_ILLADR      5       /* [XSI] illegal addressing mode -NOTIMP */
 327 #define ILL_PRVREG      6       /* [XSI] privileged register -NOTIMP */
 328 #define ILL_COPROC      7       /* [XSI] coprocessor error -NOTIMP */
 329 #define ILL_BADSTK      8       /* [XSI] internal stack error -NOTIMP */
 330
 331 /* Codes for SIGFPE */
 332 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 333 #define FPE_NOOP        0       /* if only I knew... */
 334 #endif
 335 #define FPE_FLTDIV      1       /* [XSI] floating point divide by zero */
 336 #define FPE_FLTOVF      2       /* [XSI] floating point overflow */
 337 #define FPE_FLTUND      3       /* [XSI] floating point underflow */
 338 #define FPE_FLTRES      4       /* [XSI] floating point inexact result */
 339 #define FPE_FLTINV      5       /* [XSI] invalid floating point operation */
 340 #define FPE_FLTSUB      6       /* [XSI] subscript out of range -NOTIMP */
 341 #define FPE_INTDIV      7       /* [XSI] integer divide by zero */
 342 #define FPE_INTOVF      8       /* [XSI] integer overflow */
 343
 344 /* Codes for SIGSEGV */
 345 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 346 #define SEGV_NOOP       0       /* if only I knew... */
 347 #endif
 348 #define SEGV_MAPERR     1       /* [XSI] address not mapped to object */
 349 #define SEGV_ACCERR     2       /* [XSI] invalid permission for mapped object */
 350
 351 /* Codes for SIGBUS */
 352 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 353 #define BUS_NOOP        0       /* if only I knew... */
 354 #endif
 355 #define BUS_ADRALN      1       /* [XSI] Invalid address alignment */
 356 #define BUS_ADRERR      2       /* [XSI] Nonexistent physical address -NOTIMP */
 357 #define BUS_OBJERR      3       /* [XSI] Object-specific HW error - NOTIMP */
 358
 359 /* Codes for SIGTRAP */
 360 #define TRAP_BRKPT      1       /* [XSI] Process breakpoint -NOTIMP */
 361 #define TRAP_TRACE      2       /* [XSI] Process trace trap -NOTIMP */
 362
 363 /* Codes for SIGCHLD */
 364 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 365 #define CLD_NOOP        0       /* if only I knew... */
 366 #endif
 367 #define CLD_EXITED      1       /* [XSI] child has exited */
 368 #define CLD_KILLED      2       /* [XSI] terminated abnormally, no core file */
 369 #define CLD_DUMPED      3       /* [XSI] terminated abnormally, core file */
 370 #define CLD_TRAPPED     4       /* [XSI] traced child has trapped */
 371 #define CLD_STOPPED     5       /* [XSI] child has stopped */
 372 #define CLD_CONTINUED   6       /* [XSI] stopped child has continued */
 373
 374 /* Codes for SIGPOLL */
 375 #define POLL_IN         1       /* [XSR] Data input available */
 376 #define POLL_OUT        2       /* [XSR] Output buffers available */
 377 #define POLL_MSG        3       /* [XSR] Input message available */
 378 #define POLL_ERR        4       /* [XSR] I/O error */
 379 #define POLL_PRI        5       /* [XSR] High priority input available */
 380 #define POLL_HUP        6       /* [XSR] Device disconnected */
 381
 382 /* union for signal handlers */
 383 union __sigaction_u {
 384         void    (*__sa_handler)(int);
 385         void    (*__sa_sigaction)(int, struct __siginfo *,
 386                        void *);
 387 };
 388
 389 /* Signal vector template for Kernel user boundary */
 390 struct  __sigaction {
 391         union __sigaction_u __sigaction_u;  /* signal handler */
 392         void    (*sa_tramp)(void *, int, int, siginfo_t *, void *);
 393         sigset_t sa_mask;               /* signal mask to apply */
 394         int     sa_flags;               /* see signal options below */
 395 };
 396
 397 /*
 398  * Signal vector "template" used in sigaction call.
 399  */
 400 struct  sigaction {
 401         union __sigaction_u __sigaction_u;  /* signal handler */
 402         sigset_t sa_mask;               /* signal mask to apply */
 403         int     sa_flags;               /* see signal options below */
 404 };
 405
 406 #ifdef  BSD_KERNEL_PRIVATE
 407 #include <machine/types.h>
 408
 409 union __user32_sigaction_u {
 410         user32_addr_t __sa_handler;
 411         user32_addr_t __sa_sigaction;
 412 };
 413
 414 struct  user32_sigaction {
 415         union __user32_sigaction_u __sigaction_u;  /* signal handler */
 416         sigset_t sa_mask;               /* signal mask to apply */
 417         int     sa_flags;               /* see signal options below */
 418 };
 419
 420 struct  __user32_sigaction {
 421         union __user32_sigaction_u __sigaction_u;  /* signal handler */
 422         user32_addr_t sa_tramp;
 423         sigset_t sa_mask;               /* signal mask to apply */
 424         int     sa_flags;               /* see signal options below */
 425 };
 426
 427 union __user64_sigaction_u {
 428         user64_addr_t   __sa_handler;
 429         user64_addr_t   __sa_sigaction;
 430 };
 431
 432 struct  user64_sigaction {
 433         union __user64_sigaction_u __sigaction_u;  /* signal handler */
 434         sigset_t sa_mask;               /* signal mask to apply */
 435         int     sa_flags;               /* see signal options below */
 436 };
 437
 438 struct  __user64_sigaction {
 439         union __user64_sigaction_u __sigaction_u;  /* signal handler */
 440         user64_addr_t   sa_tramp;       /* signal mask to apply */
 441         sigset_t sa_mask;               /* signal mask to apply */
 442         int     sa_flags;               /* see signal options below */
 443 };
 444
 445 union __kern_sigaction_u {
 446         user_addr_t     __sa_handler;
 447         user_addr_t     __sa_sigaction;
 448 };
 449
 450 struct  kern_sigaction {
 451         union __kern_sigaction_u __sigaction_u;  /* signal handler */
 452         sigset_t sa_mask;               /* signal mask to apply */
 453         int     sa_flags;               /* see signal options below */
 454 };
 455
 456 struct  __kern_sigaction {
 457         union __kern_sigaction_u __sigaction_u;  /* signal handler */
 458         user_addr_t     sa_tramp;       /* signal mask to apply */
 459         sigset_t sa_mask;               /* signal mask to apply */
 460         int     sa_flags;               /* see signal options below */
 461 };
 462
 463 #undef SIG_DFL
 464 #undef SIG_IGN
 465 #undef SIG_ERR
 466 #define  SIG_DFL        ((user_addr_t)0LL)
 467 #define  SIG_IGN        ((user_addr_t)1LL)
 468 #define  SIG_ERR        ((user_addr_t)-1LL)
 469
 470 #endif  /* BSD_KERNEL_PRIVATE */
 471
 472
 473 /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */
 474 #define sa_handler      __sigaction_u.__sa_handler
 475 #define sa_sigaction    __sigaction_u.__sa_sigaction
 476
 477 #define SA_ONSTACK      0x0001  /* take signal on signal stack */
 478 #define SA_RESTART      0x0002  /* restart system on signal return */
 479 #ifdef  BSD_KERNEL_PRIVATE
 480 #define SA_DISABLE      0x0004  /* disable taking signals on alternate stack - for user_sigaltstack.ss_flags only */
 481 #endif  /* BSD_KERNEL_PRIVATE */
 482 #define SA_RESETHAND    0x0004  /* reset to SIG_DFL when taking signal */
 483 #define SA_NOCLDSTOP    0x0008  /* do not generate SIGCHLD on child stop */
 484 #define SA_NODEFER      0x0010  /* don't mask the signal we're delivering */
 485 #define SA_NOCLDWAIT    0x0020  /* don't keep zombies around */
 486 #define SA_SIGINFO      0x0040  /* signal handler with SA_SIGINFO args */
 487 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 488 #define SA_USERTRAMP    0x0100  /* do not bounce off kernel's sigtramp */
 489 /* This will provide 64bit register set in a 32bit user address space */
 490 #define SA_64REGSET     0x0200  /* signal handler with SA_SIGINFO args with 64bit regs information */
 491 #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 492
 493 /* the following are the only bits we support from user space, the
 494  * rest are for kernel use only.
 495  */
 496 #define SA_USERSPACE_MASK (SA_ONSTACK | SA_RESTART | SA_RESETHAND | SA_NOCLDSTOP | SA_NODEFER | SA_NOCLDWAIT | SA_SIGINFO)
 497
 498 /*
 499  * Flags for sigprocmask:
 500  */
 501 #define SIG_BLOCK       1       /* block specified signal set */
 502 #define SIG_UNBLOCK     2       /* unblock specified signal set */
 503 #define SIG_SETMASK     3       /* set specified signal set */
 504
 505 /* POSIX 1003.1b required values. */
 506 #define SI_USER         0x10001 /* [CX] signal from kill() */
 507 #define SI_QUEUE        0x10002 /* [CX] signal from sigqueue() */
 508 #define SI_TIMER        0x10003 /* [CX] timer expiration */
 509 #define SI_ASYNCIO      0x10004 /* [CX] aio request completion */
 510 #define SI_MESGQ        0x10005 /* [CX] from message arrival on empty queue */
 511
 512 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 513 typedef void (*sig_t)(int);     /* type of signal function */
 514 #endif
 515
 516 /*
 517  * Structure used in sigaltstack call.
 518  */
 519 #ifdef  BSD_KERNEL_PRIVATE
 520
 521 struct  user32_sigaltstack {
 522         user32_addr_t   ss_sp;          /* signal stack base */
 523         user32_size_t   ss_size;        /* signal stack length */
 524         int                 ss_flags;   /* SA_DISABLE and/or SA_ONSTACK */
 525 };
 526
 527 struct  user64_sigaltstack {
 528         user64_addr_t   ss_sp;          /* signal stack base */
 529         user64_size_t   ss_size;        /* signal stack length */
 530         int             ss_flags;       /* SA_DISABLE and/or SA_ONSTACK */
 531 };
 532
 533 struct  kern_sigaltstack {
 534         user_addr_t     ss_sp;          /* signal stack base */
 535         user_size_t     ss_size;        /* signal stack length */
 536         int             ss_flags;       /* SA_DISABLE and/or SA_ONSTACK */
 537 };
 538
 539 #endif  /* BSD_KERNEL_PRIVATE */
 540
 541 #define SS_ONSTACK      0x0001  /* take signal on signal stack */
 542 #define SS_DISABLE      0x0004  /* disable taking signals on alternate stack */
 543 #define MINSIGSTKSZ     32768   /* (32K)minimum allowable stack */
 544 #define SIGSTKSZ        131072  /* (128K)recommended stack size */
 545
 546 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 547 /*
 548  * 4.3 compatibility:
 549  * Signal vector "template" used in sigvec call.
 550  */
 551 struct  sigvec {
 552         void    (*sv_handler)(int);     /* signal handler */
 553         int     sv_mask;                /* signal mask to apply */
 554         int     sv_flags;               /* see signal options below */
 555 };
 556
 557 #define SV_ONSTACK      SA_ONSTACK
 558 #define SV_INTERRUPT    SA_RESTART      /* same bit, opposite sense */
 559 #define SV_RESETHAND    SA_RESETHAND
 560 #define SV_NODEFER      SA_NODEFER
 561 #define SV_NOCLDSTOP    SA_NOCLDSTOP
 562 #define SV_SIGINFO      SA_SIGINFO
 563
 564 #define sv_onstack sv_flags     /* isn't compatibility wonderful! */
 565 #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 566
 567 /*
 568  * Structure used in sigstack call.
 569  */
 570 struct  sigstack {
 571         char    *ss_sp;                 /* signal stack pointer */
 572         int     ss_onstack;             /* current status */
 573 };
 574
 575 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 576 /*
 577  * Macro for converting signal number to a mask suitable for
 578  * sigblock().
 579  */
 580 #define sigmask(m)      (1 << ((m)-1))
 581
 582 #ifdef  BSD_KERNEL_PRIVATE
 583 /*
 584  *      signals delivered on a per-thread basis.
 585  */
 586 #define threadmask (sigmask(SIGILL)|sigmask(SIGTRAP)|\
 587                     sigmask(SIGIOT)|sigmask(SIGEMT)|\
 588                     sigmask(SIGFPE)|sigmask(SIGBUS)|\
 589                     sigmask(SIGSEGV)|sigmask(SIGSYS)|\
 590                     sigmask(SIGPIPE))
 591
 592 #define workq_threadmask (threadmask | sigcantmask)
 593
 594 /*
 595  * Signals carried across exec.
 596  */
 597 #define execmask   (sigmask(SIGHUP)|sigmask(SIGINT)|\
 598                     sigmask(SIGQUIT)|sigmask(SIGKILL)|\
 599                     sigmask(SIGTERM)|sigmask(SIGSTOP)|\
 600                     sigmask(SIGTSTP)|sigmask(SIGCONT)|\
 601                     sigmask(SIGTTIN)|sigmask(SIGTTOU)|\
 602                     sigmask(SIGUSR1)|sigmask(SIGUSR2))
 603
 604 #endif  /* BSD_KERNEL_PRIVATE */
 605
 606 #define BADSIG          SIG_ERR
 607
 608 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 609 #endif  /* !_ANSI_SOURCE */
 610
 611 /*
 612  * For historical reasons; programs expect signal's return value to be
 613  * defined by <sys/signal.h>.
 614  */
 615 __BEGIN_DECLS
 616 void    (*signal(int, void (*)(int)))(int);
 617 __END_DECLS
 618 #endif  /* !_SYS_SIGNAL_H_ */