linux_signal.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
    1 /*-
    2  * Copyright (c) 1994-1995 Søren Schmidt
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer 
   10  *    in this position and unchanged.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * $FreeBSD: releng/5.1/sys/compat/linux/linux_signal.c 114174 2003-04-28 19:43:11Z jhb $
   29  */
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/lock.h>
   34 #include <sys/mutex.h>
   35 #include <sys/proc.h>
   36 #include <sys/signalvar.h>
   37 #include <sys/syscallsubr.h>
   38 #include <sys/sysproto.h>
   39 
   40 #include <machine/../linux/linux.h>
   41 #include <machine/../linux/linux_proto.h>
   42 #include <compat/linux/linux_signal.h>
   43 #include <compat/linux/linux_util.h>
   44 
   45 void
   46 linux_to_bsd_sigset(l_sigset_t *lss, sigset_t *bss)
   47 {
   48         int b, l;
   49 
   50         SIGEMPTYSET(*bss);
   51         bss->__bits[0] = lss->__bits[0] & ~((1U << LINUX_SIGTBLSZ) - 1);
   52         bss->__bits[1] = lss->__bits[1];
   53         for (l = 1; l <= LINUX_SIGTBLSZ; l++) {
   54                 if (LINUX_SIGISMEMBER(*lss, l)) {
   55 #ifdef __alpha__
   56                         b = _SIG_IDX(l);
   57 #else
   58                         b = linux_to_bsd_signal[_SIG_IDX(l)];
   59 #endif
   60                         if (b)
   61                                 SIGADDSET(*bss, b);
   62                 }
   63         }
   64 }
   65 
   66 void
   67 bsd_to_linux_sigset(sigset_t *bss, l_sigset_t *lss)
   68 {
   69         int b, l;
   70 
   71         LINUX_SIGEMPTYSET(*lss);
   72         lss->__bits[0] = bss->__bits[0] & ~((1U << LINUX_SIGTBLSZ) - 1);
   73         lss->__bits[1] = bss->__bits[1];
   74         for (b = 1; b <= LINUX_SIGTBLSZ; b++) {
   75                 if (SIGISMEMBER(*bss, b)) {
   76 #if __alpha__
   77                         l = _SIG_IDX(b);
   78 #else
   79                         l = bsd_to_linux_signal[_SIG_IDX(b)];
   80 #endif
   81                         if (l)
   82                                 LINUX_SIGADDSET(*lss, l);
   83                 }
   84         }
   85 }
   86 
   87 static void
   88 linux_to_bsd_sigaction(l_sigaction_t *lsa, struct sigaction *bsa)
   89 {
   90 
   91         linux_to_bsd_sigset(&lsa->lsa_mask, &bsa->sa_mask);
   92         bsa->sa_handler = lsa->lsa_handler;
   93         bsa->sa_flags = 0;
   94         if (lsa->lsa_flags & LINUX_SA_NOCLDSTOP)
   95                 bsa->sa_flags |= SA_NOCLDSTOP;
   96         if (lsa->lsa_flags & LINUX_SA_NOCLDWAIT)
   97                 bsa->sa_flags |= SA_NOCLDWAIT;
   98         if (lsa->lsa_flags & LINUX_SA_SIGINFO)
   99                 bsa->sa_flags |= SA_SIGINFO;
  100         if (lsa->lsa_flags & LINUX_SA_ONSTACK)
  101                 bsa->sa_flags |= SA_ONSTACK;
  102         if (lsa->lsa_flags & LINUX_SA_RESTART)
  103                 bsa->sa_flags |= SA_RESTART;
  104         if (lsa->lsa_flags & LINUX_SA_ONESHOT)
  105                 bsa->sa_flags |= SA_RESETHAND;
  106         if (lsa->lsa_flags & LINUX_SA_NOMASK)
  107                 bsa->sa_flags |= SA_NODEFER;
  108 }
  109 
  110 static void
  111 bsd_to_linux_sigaction(struct sigaction *bsa, l_sigaction_t *lsa)
  112 {
  113 
  114         bsd_to_linux_sigset(&bsa->sa_mask, &lsa->lsa_mask);
  115         lsa->lsa_handler = bsa->sa_handler;
  116         lsa->lsa_restorer = NULL;       /* unsupported */
  117         lsa->lsa_flags = 0;
  118         if (bsa->sa_flags & SA_NOCLDSTOP)
  119                 lsa->lsa_flags |= LINUX_SA_NOCLDSTOP;
  120         if (bsa->sa_flags & SA_NOCLDWAIT)
  121                 lsa->lsa_flags |= LINUX_SA_NOCLDWAIT;
  122         if (bsa->sa_flags & SA_SIGINFO)
  123                 lsa->lsa_flags |= LINUX_SA_SIGINFO;
  124         if (bsa->sa_flags & SA_ONSTACK)
  125                 lsa->lsa_flags |= LINUX_SA_ONSTACK;
  126         if (bsa->sa_flags & SA_RESTART)
  127                 lsa->lsa_flags |= LINUX_SA_RESTART;
  128         if (bsa->sa_flags & SA_RESETHAND)
  129                 lsa->lsa_flags |= LINUX_SA_ONESHOT;
  130         if (bsa->sa_flags & SA_NODEFER)
  131                 lsa->lsa_flags |= LINUX_SA_NOMASK;
  132 }
  133 
  134 int
  135 linux_do_sigaction(struct thread *td, int linux_sig, l_sigaction_t *linux_nsa,
  136                    l_sigaction_t *linux_osa)
  137 {
  138         struct sigaction act, oact, *nsa, *osa;
  139         int error, sig;
  140 
  141         if (linux_sig <= 0 || linux_sig > LINUX_NSIG)
  142                 return (EINVAL);
  143 
  144         osa = (linux_osa != NULL) ? &oact : NULL;
  145         if (linux_nsa != NULL) {
  146                 nsa = &act;
  147                 linux_to_bsd_sigaction(linux_nsa, nsa);
  148         } else
  149                 nsa = NULL;
  150 
  151 #ifndef __alpha__
  152         if (linux_sig <= LINUX_SIGTBLSZ)
  153                 sig = linux_to_bsd_signal[_SIG_IDX(linux_sig)];
  154         else
  155 #endif
  156                 sig = linux_sig;
  157 
  158         error = kern_sigaction(td, sig, nsa, osa, 0);
  159         if (error)
  160                 return (error);
  161 
  162         if (linux_osa != NULL)
  163                 bsd_to_linux_sigaction(osa, linux_osa);
  164 
  165         return (0);
  166 }
  167 
  168 
  169 #ifndef __alpha__
  170 int
  171 linux_signal(struct thread *td, struct linux_signal_args *args)
  172 {
  173         l_sigaction_t nsa, osa;
  174         int error;
  175 
  176 #ifdef DEBUG
  177         if (ldebug(signal))
  178                 printf(ARGS(signal, "%d, %p"),
  179                     args->sig, (void *)args->handler);
  180 #endif
  181 
  182         nsa.lsa_handler = args->handler;
  183         nsa.lsa_flags = LINUX_SA_ONESHOT | LINUX_SA_NOMASK;
  184         LINUX_SIGEMPTYSET(nsa.lsa_mask);
  185 
  186         error = linux_do_sigaction(td, args->sig, &nsa, &osa);
  187         td->td_retval[0] = (int)osa.lsa_handler;
  188 
  189         return (error);
  190 }
  191 #endif  /*!__alpha__*/
  192 
  193 int
  194 linux_rt_sigaction(struct thread *td, struct linux_rt_sigaction_args *args)
  195 {
  196         l_sigaction_t nsa, osa;
  197         int error;
  198 
  199 #ifdef DEBUG
  200         if (ldebug(rt_sigaction))
  201                 printf(ARGS(rt_sigaction, "%ld, %p, %p, %ld"),
  202                     (long)args->sig, (void *)args->act,
  203                     (void *)args->oact, (long)args->sigsetsize);
  204 #endif
  205 
  206         if (args->sigsetsize != sizeof(l_sigset_t))
  207                 return (EINVAL);
  208 
  209         if (args->act != NULL) {
  210                 error = copyin(args->act, &nsa, sizeof(l_sigaction_t));
  211                 if (error)
  212                         return (error);
  213         }
  214 
  215         error = linux_do_sigaction(td, args->sig,
  216                                    args->act ? &nsa : NULL,
  217                                    args->oact ? &osa : NULL);
  218 
  219         if (args->oact != NULL && !error) {
  220                 error = copyout(&osa, args->oact, sizeof(l_sigaction_t));
  221         }
  222 
  223         return (error);
  224 }
  225 
  226 static int
  227 linux_do_sigprocmask(struct thread *td, int how, l_sigset_t *new,
  228                      l_sigset_t *old)
  229 {
  230         sigset_t omask, nmask;
  231         sigset_t *nmaskp;
  232         int error;
  233 
  234         td->td_retval[0] = 0;
  235 
  236         switch (how) {
  237         case LINUX_SIG_BLOCK:
  238                 how = SIG_BLOCK;
  239                 break;
  240         case LINUX_SIG_UNBLOCK:
  241                 how = SIG_UNBLOCK;
  242                 break;
  243         case LINUX_SIG_SETMASK:
  244                 how = SIG_SETMASK;
  245                 break;
  246         default:
  247                 return (EINVAL);
  248         }
  249         if (new != NULL) {
  250                 linux_to_bsd_sigset(new, &nmask);
  251                 nmaskp = &nmask;
  252         } else
  253                 nmaskp = NULL;
  254         error = kern_sigprocmask(td, how, nmaskp, &omask, 0);
  255         if (error == 0 && old != NULL)
  256                 bsd_to_linux_sigset(&omask, old);
  257 
  258         return (error);
  259 }
  260 
  261 #ifndef __alpha__
  262 int
  263 linux_sigprocmask(struct thread *td, struct linux_sigprocmask_args *args)
  264 {
  265         l_osigset_t mask;
  266         l_sigset_t set, oset;
  267         int error;
  268 
  269 #ifdef DEBUG
  270         if (ldebug(sigprocmask))
  271                 printf(ARGS(sigprocmask, "%d, *, *"), args->how);
  272 #endif
  273 
  274         if (args->mask != NULL) {
  275                 error = copyin(args->mask, &mask, sizeof(l_osigset_t));
  276                 if (error)
  277                         return (error);
  278                 LINUX_SIGEMPTYSET(set);
  279                 set.__bits[0] = mask;
  280         }
  281 
  282         error = linux_do_sigprocmask(td, args->how,
  283                                      args->mask ? &set : NULL,
  284                                      args->omask ? &oset : NULL);
  285 
  286         if (args->omask != NULL && !error) {
  287                 mask = oset.__bits[0];
  288                 error = copyout(&mask, args->omask, sizeof(l_osigset_t));
  289         }
  290 
  291         return (error);
  292 }
  293 #endif  /*!__alpha__*/
  294 
  295 int
  296 linux_rt_sigprocmask(struct thread *td, struct linux_rt_sigprocmask_args *args)
  297 {
  298         l_sigset_t set, oset;
  299         int error;
  300 
  301 #ifdef DEBUG
  302         if (ldebug(rt_sigprocmask))
  303                 printf(ARGS(rt_sigprocmask, "%d, %p, %p, %ld"),
  304                     args->how, (void *)args->mask,
  305                     (void *)args->omask, (long)args->sigsetsize);
  306 #endif
  307 
  308         if (args->sigsetsize != sizeof(l_sigset_t))
  309                 return EINVAL;
  310 
  311         if (args->mask != NULL) {
  312                 error = copyin(args->mask, &set, sizeof(l_sigset_t));
  313                 if (error)
  314                         return (error);
  315         }
  316 
  317         error = linux_do_sigprocmask(td, args->how,
  318                                      args->mask ? &set : NULL,
  319                                      args->omask ? &oset : NULL);
  320 
  321         if (args->omask != NULL && !error) {
  322                 error = copyout(&oset, args->omask, sizeof(l_sigset_t));
  323         }
  324 
  325         return (error);
  326 }
  327 
  328 #ifndef __alpha__
  329 int
  330 linux_sgetmask(struct thread *td, struct linux_sgetmask_args *args)
  331 {
  332         struct proc *p = td->td_proc;
  333         l_sigset_t mask;
  334 
  335 #ifdef DEBUG
  336         if (ldebug(sgetmask))
  337                 printf(ARGS(sgetmask, ""));
  338 #endif
  339 
  340         PROC_LOCK(p);
  341         bsd_to_linux_sigset(&td->td_sigmask, &mask);
  342         PROC_UNLOCK(p);
  343         td->td_retval[0] = mask.__bits[0];
  344         return (0);
  345 }
  346 
  347 int
  348 linux_ssetmask(struct thread *td, struct linux_ssetmask_args *args)
  349 {
  350         struct proc *p = td->td_proc;
  351         l_sigset_t lset;
  352         sigset_t bset;
  353 
  354 #ifdef DEBUG
  355         if (ldebug(ssetmask))
  356                 printf(ARGS(ssetmask, "%08lx"), (unsigned long)args->mask);
  357 #endif
  358 
  359         PROC_LOCK(p);
  360         bsd_to_linux_sigset(&td->td_sigmask, &lset);
  361         td->td_retval[0] = lset.__bits[0];
  362         LINUX_SIGEMPTYSET(lset);
  363         lset.__bits[0] = args->mask;
  364         linux_to_bsd_sigset(&lset, &bset);
  365         td->td_sigmask = bset;
  366         SIG_CANTMASK(td->td_sigmask);
  367         signotify(td);
  368         PROC_UNLOCK(p);
  369         return (0);
  370 }
  371 
  372 /*
  373  * MPSAFE
  374  */
  375 int
  376 linux_sigpending(struct thread *td, struct linux_sigpending_args *args)
  377 {
  378         struct proc *p = td->td_proc;
  379         sigset_t bset;
  380         l_sigset_t lset;
  381         l_osigset_t mask;
  382 
  383 #ifdef DEBUG
  384         if (ldebug(sigpending))
  385                 printf(ARGS(sigpending, "*"));
  386 #endif
  387 
  388         PROC_LOCK(p);
  389         bset = p->p_siglist;
  390         SIGSETOR(bset, td->td_siglist);
  391         SIGSETAND(bset, td->td_sigmask);
  392         PROC_UNLOCK(p);
  393         bsd_to_linux_sigset(&bset, &lset);
  394         mask = lset.__bits[0];
  395         return (copyout(&mask, args->mask, sizeof(mask)));
  396 }
  397 #endif  /*!__alpha__*/
  398 
  399 int
  400 linux_kill(struct thread *td, struct linux_kill_args *args)
  401 {
  402         struct kill_args /* {
  403             int pid;
  404             int signum;
  405         } */ tmp;
  406 
  407 #ifdef DEBUG
  408         if (ldebug(kill))
  409                 printf(ARGS(kill, "%d, %d"), args->pid, args->signum);
  410 #endif
  411 
  412         /*
  413          * Allow signal 0 as a means to check for privileges
  414          */
  415         if (args->signum < 0 || args->signum > LINUX_NSIG)
  416                 return EINVAL;
  417 
  418 #ifndef __alpha__
  419         if (args->signum > 0 && args->signum <= LINUX_SIGTBLSZ)
  420                 tmp.signum = linux_to_bsd_signal[_SIG_IDX(args->signum)];
  421         else
  422 #endif
  423                 tmp.signum = args->signum;
  424 
  425         tmp.pid = args->pid;
  426         return (kill(td, &tmp));
  427 }
Cache object: 3b93268cf23b22a0b318160ce25b38df
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.
FreeBSD/Linux Kernel Cross Reference sys/compat/linux/linux_signal.c

FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_signal.c
