bsd/sys/signalvar.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  26 /*
  27  * Copyright (c) 1991, 1993
  28  *      The Regents of the University of California.  All rights reserved.
  29  *
  30  * Redistribution and use in source and binary forms, with or without
  31  * modification, are permitted provided that the following conditions
  32  * are met:
  33  * 1. Redistributions of source code must retain the above copyright
  34  *    notice, this list of conditions and the following disclaimer.
  35  * 2. Redistributions in binary form must reproduce the above copyright
  36  *    notice, this list of conditions and the following disclaimer in the
  37  *    documentation and/or other materials provided with the distribution.
  38  * 3. All advertising materials mentioning features or use of this software
  39  *    must display the following acknowledgement:
  40  *      This product includes software developed by the University of
  41  *      California, Berkeley and its contributors.
  42  * 4. Neither the name of the University nor the names of its contributors
  43  *    may be used to endorse or promote products derived from this software
  44  *    without specific prior written permission.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  *
  58  *      @(#)signalvar.h 8.3 (Berkeley) 1/4/94
  59  */
  60
  61 #ifndef _SYS_SIGNALVAR_H_               /* tmp for user.h */
  62 #define _SYS_SIGNALVAR_H_
  63
  64 #include <sys/appleapiopts.h>
  65
  66 #ifdef __APPLE_API_PRIVATE
  67 /*
  68  * Kernel signal definitions and data structures,
  69  * not exported to user programs.
  70  */
  71
  72 /*
  73  * Process signal actions and state, needed only within the process
  74  * (not necessarily resident).
  75  */
  76 struct  sigacts {
  77         sig_t   ps_sigact[NSIG];        /* disposition of signals */
  78         sig_t   ps_trampact[NSIG];      /* disposition of signals */
  79         sigset_t ps_catchmask[NSIG];    /* signals to be blocked */
  80         sigset_t ps_sigonstack;         /* signals to take on sigstack */
  81         sigset_t ps_sigintr;            /* signals that interrupt syscalls */
  82         sigset_t ps_sigreset;           /* signals that reset when caught */
  83         sigset_t ps_signodefer;         /* signals not masked while handled */
  84         sigset_t ps_siginfo;            /* signals that want SA_SIGINFO args */
  85         sigset_t ps_oldmask;            /* saved mask from before sigpause */
  86         int     ps_flags;               /* signal flags, below */
  87         struct  sigaltstack ps_sigstk;  /* sp & on stack state variable */
  88         int     ps_sig;                 /* for core dump/debugger XXX */
  89         int     ps_code;                /* for core dump/debugger XXX */
  90         int     ps_addr;                /* for core dump/debugger XXX */
  91         sigset_t ps_usertramp;          /* SunOS compat; libc sigtramp XXX */
  92         sigset_t ps_64regset;           /* signals that want SA_EXSIGINFO args */
  93 };
  94
  95 /* signal flags */
  96 #define SAS_OLDMASK     0x01            /* need to restore mask before pause */
  97 #define SAS_ALTSTACK    0x02            /* have alternate signal stack */
  98
  99 /* additional signal action values, used only temporarily/internally */
 100 #define SIG_CATCH       (void (*)())2
 101 #define SIG_HOLD        (void (*)())3
 102 #define SIG_WAIT        (void (*)())4
 103
 104 #define pgsigio(pgid, sig, notused) \
 105         { \
 106         struct proc *p; \
 107         if (pgid < 0) \
 108                 gsignal(-(pgid), sig);\
 109         else if (pgid > 0 && (p = pfind(pgid)) != 0) \
 110                 psignal(p, sig); \
 111 }
 112
 113 /*
 114  * get signal action for process and signal; currently only for current process
 115  */
 116 #define SIGACTION(p, sig)       (p->p_sigacts->ps_sigact[(sig)])
 117
 118 /*
 119  *      Check for per-process and per thread signals.
 120  */
 121 #define SHOULDissignal(p,uthreadp) \
 122          (((uthreadp)->uu_siglist)      \
 123           & ~((((uthreadp)->uu_sigmask) \
 124                | (((p)->p_flag & P_TRACED) ? 0 : (p)->p_sigignore)) \
 125               & ~sigcantmask))
 126
 127 /*
 128  *      Check for signals and per-thread signals.
 129  *  Use in trap() and syscall() before
 130  *      exiting kernel.
 131  */
 132 #define CHECK_SIGNALS(p, thread, uthreadp)      \
 133         (!thread_should_halt(thread)    \
 134          && (SHOULDissignal(p,uthreadp)))
 135
 136 /*
 137  * Signal properties and actions.
 138  * The array below categorizes the signals and their default actions
 139  * according to the following properties:
 140  */
 141 #define SA_KILL         0x01            /* terminates process by default */
 142 #define SA_CORE         0x02            /* ditto and coredumps */
 143 #define SA_STOP         0x04            /* suspend process */
 144 #define SA_TTYSTOP      0x08            /* ditto, from tty */
 145 #define SA_IGNORE       0x10            /* ignore by default */
 146 #define SA_CONT         0x20            /* continue if suspended */
 147 #define SA_CANTMASK     0x40            /* non-maskable, catchable */
 148
 149 #ifdef  SIGPROP
 150 int sigprop[NSIG + 1] = {
 151         0,                      /* unused */
 152         SA_KILL,                /* SIGHUP */
 153         SA_KILL,                /* SIGINT */
 154         SA_KILL|SA_CORE,        /* SIGQUIT */
 155         SA_KILL|SA_CORE,        /* SIGILL */
 156         SA_KILL|SA_CORE,        /* SIGTRAP */
 157         SA_KILL|SA_CORE,        /* SIGABRT */
 158         SA_KILL|SA_CORE,        /* SIGEMT */
 159         SA_KILL|SA_CORE,        /* SIGFPE */
 160         SA_KILL,                /* SIGKILL */
 161         SA_KILL|SA_CORE,        /* SIGBUS */
 162         SA_KILL|SA_CORE,        /* SIGSEGV */
 163         SA_KILL|SA_CORE,        /* SIGSYS */
 164         SA_KILL,                /* SIGPIPE */
 165         SA_KILL,                /* SIGALRM */
 166         SA_KILL,                /* SIGTERM */
 167         SA_IGNORE,              /* SIGURG */
 168         SA_STOP,                /* SIGSTOP */
 169         SA_STOP|SA_TTYSTOP,     /* SIGTSTP */
 170         SA_IGNORE|SA_CONT,      /* SIGCONT */
 171         SA_IGNORE,              /* SIGCHLD */
 172         SA_STOP|SA_TTYSTOP,     /* SIGTTIN */
 173         SA_STOP|SA_TTYSTOP,     /* SIGTTOU */
 174         SA_IGNORE,              /* SIGIO */
 175         SA_KILL,                /* SIGXCPU */
 176         SA_KILL,                /* SIGXFSZ */
 177         SA_KILL,                /* SIGVTALRM */
 178         SA_KILL,                /* SIGPROF */
 179         SA_IGNORE,              /* SIGWINCH  */
 180         SA_IGNORE,              /* SIGINFO */
 181         SA_KILL,                /* SIGUSR1 */
 182         SA_KILL,                /* SIGUSR2 */
 183 };
 184
 185 #define contsigmask     (sigmask(SIGCONT))
 186 #define stopsigmask     (sigmask(SIGSTOP) | sigmask(SIGTSTP) | \
 187                             sigmask(SIGTTIN) | sigmask(SIGTTOU))
 188
 189 #endif /* SIGPROP */
 190
 191 #define sigcantmask     (sigmask(SIGKILL) | sigmask(SIGSTOP))
 192
 193 #ifdef KERNEL
 194 /*
 195  * Machine-independent functions:
 196  */
 197 int     coredump __P((struct proc *p));
 198 void    execsigs __P((struct proc *p, thread_act_t thr_act));
 199 void    gsignal __P((int pgid, int sig));
 200 int     issignal __P((struct proc *p));
 201 int     CURSIG __P((struct proc *p));
 202 int clear_procsiglist __P((struct proc *p, int bit));
 203 int clear_procsigmask __P((struct proc *p, int bit));
 204 int set_procsigmask __P((struct proc *p, int bit));
 205 void    tty_pgsignal __P((struct pgrp *pgrp, int sig));
 206 void    postsig __P((int sig));
 207 void    siginit __P((struct proc *p));
 208 void    trapsignal __P((struct proc *p, int sig, unsigned code));
 209 void    pt_setrunnable __P((struct proc *p));
 210
 211 /*
 212  * Machine-dependent functions:
 213  */
 214 void    sendsig __P((struct proc *, sig_t action, int sig,
 215         int returnmask, u_long code));
 216
 217 #ifdef __APPLE_API_UNSTABLE
 218 void    psignal __P((struct proc *p, int sig));
 219 void    pgsignal __P((struct pgrp *pgrp, int sig, int checkctty));
 220 #endif /* __APPLE_API_UNSTABLE */
 221
 222 #endif  /* KERNEL */
 223
 224 #endif /* __APPLE_API_PRIVATE */
 225
 226 #endif  /* !_SYS_SIGNALVAR_H_ */