linux_signal.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause
    3  *
    4  * Copyright (c) 1994-1995 Søren Schmidt
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/lock.h>
   35 #include <sys/mutex.h>
   36 #include <sys/sx.h>
   37 #include <sys/proc.h>
   38 #include <sys/signalvar.h>
   39 #include <sys/syscallsubr.h>
   40 #include <sys/sysproto.h>
   41 
   42 #include <security/audit/audit.h>
   43 
   44 #include "opt_compat.h"
   45 
   46 #ifdef COMPAT_LINUX32
   47 #include <machine/../linux32/linux.h>
   48 #include <machine/../linux32/linux32_proto.h>
   49 #else
   50 #include <machine/../linux/linux.h>
   51 #include <machine/../linux/linux_proto.h>
   52 #endif
   53 #include <compat/linux/linux_signal.h>
   54 #include <compat/linux/linux_util.h>
   55 #include <compat/linux/linux_emul.h>
   56 #include <compat/linux/linux_misc.h>
   57 
   58 static int      linux_do_tkill(struct thread *td, struct thread *tdt,
   59                     ksiginfo_t *ksi);
   60 static void     sicode_to_lsicode(int si_code, int *lsi_code);
   61 
   62 
   63 static void
   64 linux_to_bsd_sigaction(l_sigaction_t *lsa, struct sigaction *bsa)
   65 {
   66 
   67         linux_to_bsd_sigset(&lsa->lsa_mask, &bsa->sa_mask);
   68         bsa->sa_handler = PTRIN(lsa->lsa_handler);
   69         bsa->sa_flags = 0;
   70         if (lsa->lsa_flags & LINUX_SA_NOCLDSTOP)
   71                 bsa->sa_flags |= SA_NOCLDSTOP;
   72         if (lsa->lsa_flags & LINUX_SA_NOCLDWAIT)
   73                 bsa->sa_flags |= SA_NOCLDWAIT;
   74         if (lsa->lsa_flags & LINUX_SA_SIGINFO)
   75                 bsa->sa_flags |= SA_SIGINFO;
   76         if (lsa->lsa_flags & LINUX_SA_ONSTACK)
   77                 bsa->sa_flags |= SA_ONSTACK;
   78         if (lsa->lsa_flags & LINUX_SA_RESTART)
   79                 bsa->sa_flags |= SA_RESTART;
   80         if (lsa->lsa_flags & LINUX_SA_ONESHOT)
   81                 bsa->sa_flags |= SA_RESETHAND;
   82         if (lsa->lsa_flags & LINUX_SA_NOMASK)
   83                 bsa->sa_flags |= SA_NODEFER;
   84 }
   85 
   86 static void
   87 bsd_to_linux_sigaction(struct sigaction *bsa, l_sigaction_t *lsa)
   88 {
   89 
   90         bsd_to_linux_sigset(&bsa->sa_mask, &lsa->lsa_mask);
   91 #ifdef COMPAT_LINUX32
   92         lsa->lsa_handler = (uintptr_t)bsa->sa_handler;
   93 #else
   94         lsa->lsa_handler = bsa->sa_handler;
   95 #endif
   96         lsa->lsa_restorer = 0;          /* unsupported */
   97         lsa->lsa_flags = 0;
   98         if (bsa->sa_flags & SA_NOCLDSTOP)
   99                 lsa->lsa_flags |= LINUX_SA_NOCLDSTOP;
  100         if (bsa->sa_flags & SA_NOCLDWAIT)
  101                 lsa->lsa_flags |= LINUX_SA_NOCLDWAIT;
  102         if (bsa->sa_flags & SA_SIGINFO)
  103                 lsa->lsa_flags |= LINUX_SA_SIGINFO;
  104         if (bsa->sa_flags & SA_ONSTACK)
  105                 lsa->lsa_flags |= LINUX_SA_ONSTACK;
  106         if (bsa->sa_flags & SA_RESTART)
  107                 lsa->lsa_flags |= LINUX_SA_RESTART;
  108         if (bsa->sa_flags & SA_RESETHAND)
  109                 lsa->lsa_flags |= LINUX_SA_ONESHOT;
  110         if (bsa->sa_flags & SA_NODEFER)
  111                 lsa->lsa_flags |= LINUX_SA_NOMASK;
  112 }
  113 
  114 int
  115 linux_do_sigaction(struct thread *td, int linux_sig, l_sigaction_t *linux_nsa,
  116                    l_sigaction_t *linux_osa)
  117 {
  118         struct sigaction act, oact, *nsa, *osa;
  119         int error, sig;
  120 
  121         if (!LINUX_SIG_VALID(linux_sig))
  122                 return (EINVAL);
  123 
  124         osa = (linux_osa != NULL) ? &oact : NULL;
  125         if (linux_nsa != NULL) {
  126                 nsa = &act;
  127                 linux_to_bsd_sigaction(linux_nsa, nsa);
  128         } else
  129                 nsa = NULL;
  130         sig = linux_to_bsd_signal(linux_sig);
  131 
  132         error = kern_sigaction(td, sig, nsa, osa, 0);
  133         if (error)
  134                 return (error);
  135 
  136         if (linux_osa != NULL)
  137                 bsd_to_linux_sigaction(osa, linux_osa);
  138 
  139         return (0);
  140 }
  141 
  142 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
  143 int
  144 linux_signal(struct thread *td, struct linux_signal_args *args)
  145 {
  146         l_sigaction_t nsa, osa;
  147         int error;
  148 
  149         nsa.lsa_handler = args->handler;
  150         nsa.lsa_flags = LINUX_SA_ONESHOT | LINUX_SA_NOMASK;
  151         LINUX_SIGEMPTYSET(nsa.lsa_mask);
  152 
  153         error = linux_do_sigaction(td, args->sig, &nsa, &osa);
  154         td->td_retval[0] = (int)(intptr_t)osa.lsa_handler;
  155 
  156         return (error);
  157 }
  158 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
  159 
  160 int
  161 linux_rt_sigaction(struct thread *td, struct linux_rt_sigaction_args *args)
  162 {
  163         l_sigaction_t nsa, osa;
  164         int error;
  165 
  166         if (args->sigsetsize != sizeof(l_sigset_t))
  167                 return (EINVAL);
  168 
  169         if (args->act != NULL) {
  170                 error = copyin(args->act, &nsa, sizeof(l_sigaction_t));
  171                 if (error)
  172                         return (error);
  173         }
  174 
  175         error = linux_do_sigaction(td, args->sig,
  176                                    args->act ? &nsa : NULL,
  177                                    args->oact ? &osa : NULL);
  178 
  179         if (args->oact != NULL && !error) {
  180                 error = copyout(&osa, args->oact, sizeof(l_sigaction_t));
  181         }
  182 
  183         return (error);
  184 }
  185 
  186 static int
  187 linux_do_sigprocmask(struct thread *td, int how, l_sigset_t *new,
  188                      l_sigset_t *old)
  189 {
  190         sigset_t omask, nmask;
  191         sigset_t *nmaskp;
  192         int error;
  193 
  194         td->td_retval[0] = 0;
  195 
  196         switch (how) {
  197         case LINUX_SIG_BLOCK:
  198                 how = SIG_BLOCK;
  199                 break;
  200         case LINUX_SIG_UNBLOCK:
  201                 how = SIG_UNBLOCK;
  202                 break;
  203         case LINUX_SIG_SETMASK:
  204                 how = SIG_SETMASK;
  205                 break;
  206         default:
  207                 return (EINVAL);
  208         }
  209         if (new != NULL) {
  210                 linux_to_bsd_sigset(new, &nmask);
  211                 nmaskp = &nmask;
  212         } else
  213                 nmaskp = NULL;
  214         error = kern_sigprocmask(td, how, nmaskp, &omask, 0);
  215         if (error == 0 && old != NULL)
  216                 bsd_to_linux_sigset(&omask, old);
  217 
  218         return (error);
  219 }
  220 
  221 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
  222 int
  223 linux_sigprocmask(struct thread *td, struct linux_sigprocmask_args *args)
  224 {
  225         l_osigset_t mask;
  226         l_sigset_t set, oset;
  227         int error;
  228 
  229         if (args->mask != NULL) {
  230                 error = copyin(args->mask, &mask, sizeof(l_osigset_t));
  231                 if (error)
  232                         return (error);
  233                 LINUX_SIGEMPTYSET(set);
  234                 set.__mask = mask;
  235         }
  236 
  237         error = linux_do_sigprocmask(td, args->how,
  238                                      args->mask ? &set : NULL,
  239                                      args->omask ? &oset : NULL);
  240 
  241         if (args->omask != NULL && !error) {
  242                 mask = oset.__mask;
  243                 error = copyout(&mask, args->omask, sizeof(l_osigset_t));
  244         }
  245 
  246         return (error);
  247 }
  248 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
  249 
  250 int
  251 linux_rt_sigprocmask(struct thread *td, struct linux_rt_sigprocmask_args *args)
  252 {
  253         l_sigset_t set, oset;
  254         int error;
  255 
  256         if (args->sigsetsize != sizeof(l_sigset_t))
  257                 return (EINVAL);
  258 
  259         if (args->mask != NULL) {
  260                 error = copyin(args->mask, &set, sizeof(l_sigset_t));
  261                 if (error)
  262                         return (error);
  263         }
  264 
  265         error = linux_do_sigprocmask(td, args->how,
  266                                      args->mask ? &set : NULL,
  267                                      args->omask ? &oset : NULL);
  268 
  269         if (args->omask != NULL && !error) {
  270                 error = copyout(&oset, args->omask, sizeof(l_sigset_t));
  271         }
  272 
  273         return (error);
  274 }
  275 
  276 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
  277 int
  278 linux_sgetmask(struct thread *td, struct linux_sgetmask_args *args)
  279 {
  280         struct proc *p = td->td_proc;
  281         l_sigset_t mask;
  282 
  283         PROC_LOCK(p);
  284         bsd_to_linux_sigset(&td->td_sigmask, &mask);
  285         PROC_UNLOCK(p);
  286         td->td_retval[0] = mask.__mask;
  287         return (0);
  288 }
  289 
  290 int
  291 linux_ssetmask(struct thread *td, struct linux_ssetmask_args *args)
  292 {
  293         struct proc *p = td->td_proc;
  294         l_sigset_t lset;
  295         sigset_t bset;
  296 
  297         PROC_LOCK(p);
  298         bsd_to_linux_sigset(&td->td_sigmask, &lset);
  299         td->td_retval[0] = lset.__mask;
  300         LINUX_SIGEMPTYSET(lset);
  301         lset.__mask = args->mask;
  302         linux_to_bsd_sigset(&lset, &bset);
  303         td->td_sigmask = bset;
  304         SIG_CANTMASK(td->td_sigmask);
  305         signotify(td);
  306         PROC_UNLOCK(p);
  307         return (0);
  308 }
  309 
  310 int
  311 linux_sigpending(struct thread *td, struct linux_sigpending_args *args)
  312 {
  313         struct proc *p = td->td_proc;
  314         sigset_t bset;
  315         l_sigset_t lset;
  316         l_osigset_t mask;
  317 
  318         PROC_LOCK(p);
  319         bset = p->p_siglist;
  320         SIGSETOR(bset, td->td_siglist);
  321         SIGSETAND(bset, td->td_sigmask);
  322         PROC_UNLOCK(p);
  323         bsd_to_linux_sigset(&bset, &lset);
  324         mask = lset.__mask;
  325         return (copyout(&mask, args->mask, sizeof(mask)));
  326 }
  327 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
  328 
  329 /*
  330  * MPSAFE
  331  */
  332 int
  333 linux_rt_sigpending(struct thread *td, struct linux_rt_sigpending_args *args)
  334 {
  335         struct proc *p = td->td_proc;
  336         sigset_t bset;
  337         l_sigset_t lset;
  338 
  339         if (args->sigsetsize > sizeof(lset))
  340                 return (EINVAL);
  341                 /* NOT REACHED */
  342 
  343         PROC_LOCK(p);
  344         bset = p->p_siglist;
  345         SIGSETOR(bset, td->td_siglist);
  346         SIGSETAND(bset, td->td_sigmask);
  347         PROC_UNLOCK(p);
  348         bsd_to_linux_sigset(&bset, &lset);
  349         return (copyout(&lset, args->set, args->sigsetsize));
  350 }
  351 
  352 /*
  353  * MPSAFE
  354  */
  355 int
  356 linux_rt_sigtimedwait(struct thread *td,
  357         struct linux_rt_sigtimedwait_args *args)
  358 {
  359         int error, sig;
  360         l_timeval ltv;
  361         struct timeval tv;
  362         struct timespec ts, *tsa;
  363         l_sigset_t lset;
  364         sigset_t bset;
  365         l_siginfo_t linfo;
  366         ksiginfo_t info;
  367 
  368         if (args->sigsetsize != sizeof(l_sigset_t))
  369                 return (EINVAL);
  370 
  371         if ((error = copyin(args->mask, &lset, sizeof(lset))))
  372                 return (error);
  373         linux_to_bsd_sigset(&lset, &bset);
  374 
  375         tsa = NULL;
  376         if (args->timeout) {
  377                 if ((error = copyin(args->timeout, &ltv, sizeof(ltv))))
  378                         return (error);
  379                 tv.tv_sec = (long)ltv.tv_sec;
  380                 tv.tv_usec = (suseconds_t)ltv.tv_usec;
  381                 if (itimerfix(&tv)) {
  382                         /*
  383                          * The timeout was invalid. Convert it to something
  384                          * valid that will act as it does under Linux.
  385                          */
  386                         tv.tv_sec += tv.tv_usec / 1000000;
  387                         tv.tv_usec %= 1000000;
  388                         if (tv.tv_usec < 0) {
  389                                 tv.tv_sec -= 1;
  390                                 tv.tv_usec += 1000000;
  391                         }
  392                         if (tv.tv_sec < 0)
  393                                 timevalclear(&tv);
  394                 }
  395                 TIMEVAL_TO_TIMESPEC(&tv, &ts);
  396                 tsa = &ts;
  397         }
  398         error = kern_sigtimedwait(td, bset, &info, tsa);
  399         if (error)
  400                 return (error);
  401 
  402         sig = bsd_to_linux_signal(info.ksi_signo);
  403 
  404         if (args->ptr) {
  405                 memset(&linfo, 0, sizeof(linfo));
  406                 ksiginfo_to_lsiginfo(&info, &linfo, sig);
  407                 error = copyout(&linfo, args->ptr, sizeof(linfo));
  408         }
  409         if (error == 0)
  410                 td->td_retval[0] = sig;
  411 
  412         return (error);
  413 }
  414 
  415 int
  416 linux_kill(struct thread *td, struct linux_kill_args *args)
  417 {
  418         struct kill_args /* {
  419             int pid;
  420             int signum;
  421         } */ tmp;
  422 
  423         /*
  424          * Allow signal 0 as a means to check for privileges
  425          */
  426         if (!LINUX_SIG_VALID(args->signum) && args->signum != 0)
  427                 return (EINVAL);
  428 
  429         if (args->signum > 0)
  430                 tmp.signum = linux_to_bsd_signal(args->signum);
  431         else
  432                 tmp.signum = 0;
  433 
  434         tmp.pid = args->pid;
  435         return (sys_kill(td, &tmp));
  436 }
  437 
  438 static int
  439 linux_do_tkill(struct thread *td, struct thread *tdt, ksiginfo_t *ksi)
  440 {
  441         struct proc *p;
  442         int error;
  443 
  444         p = tdt->td_proc;
  445         AUDIT_ARG_SIGNUM(ksi->ksi_signo);
  446         AUDIT_ARG_PID(p->p_pid);
  447         AUDIT_ARG_PROCESS(p);
  448 
  449         error = p_cansignal(td, p, ksi->ksi_signo);
  450         if (error != 0 || ksi->ksi_signo == 0)
  451                 goto out;
  452 
  453         tdksignal(tdt, ksi->ksi_signo, ksi);
  454 
  455 out:
  456         PROC_UNLOCK(p);
  457         return (error);
  458 }
  459 
  460 int
  461 linux_tgkill(struct thread *td, struct linux_tgkill_args *args)
  462 {
  463         struct thread *tdt;
  464         ksiginfo_t ksi;
  465         int sig;
  466 
  467         if (args->pid <= 0 || args->tgid <=0)
  468                 return (EINVAL);
  469 
  470         /*
  471          * Allow signal 0 as a means to check for privileges
  472          */
  473         if (!LINUX_SIG_VALID(args->sig) && args->sig != 0)
  474                 return (EINVAL);
  475 
  476         if (args->sig > 0)
  477                 sig = linux_to_bsd_signal(args->sig);
  478         else
  479                 sig = 0;
  480 
  481         tdt = linux_tdfind(td, args->pid, args->tgid);
  482         if (tdt == NULL)
  483                 return (ESRCH);
  484 
  485         ksiginfo_init(&ksi);
  486         ksi.ksi_signo = sig;
  487         ksi.ksi_code = SI_LWP;
  488         ksi.ksi_errno = 0;
  489         ksi.ksi_pid = td->td_proc->p_pid;
  490         ksi.ksi_uid = td->td_proc->p_ucred->cr_ruid;
  491         return (linux_do_tkill(td, tdt, &ksi));
  492 }
  493 
  494 /*
  495  * Deprecated since 2.5.75. Replaced by tgkill().
  496  */
  497 int
  498 linux_tkill(struct thread *td, struct linux_tkill_args *args)
  499 {
  500         struct thread *tdt;
  501         ksiginfo_t ksi;
  502         int sig;
  503 
  504         if (args->tid <= 0)
  505                 return (EINVAL);
  506 
  507         if (!LINUX_SIG_VALID(args->sig))
  508                 return (EINVAL);
  509 
  510         sig = linux_to_bsd_signal(args->sig);
  511 
  512         tdt = linux_tdfind(td, args->tid, -1);
  513         if (tdt == NULL)
  514                 return (ESRCH);
  515 
  516         ksiginfo_init(&ksi);
  517         ksi.ksi_signo = sig;
  518         ksi.ksi_code = SI_LWP;
  519         ksi.ksi_errno = 0;
  520         ksi.ksi_pid = td->td_proc->p_pid;
  521         ksi.ksi_uid = td->td_proc->p_ucred->cr_ruid;
  522         return (linux_do_tkill(td, tdt, &ksi));
  523 }
  524 
  525 void
  526 ksiginfo_to_lsiginfo(const ksiginfo_t *ksi, l_siginfo_t *lsi, l_int sig)
  527 {
  528 
  529         siginfo_to_lsiginfo(&ksi->ksi_info, lsi, sig);
  530 }
  531 
  532 static void
  533 sicode_to_lsicode(int si_code, int *lsi_code)
  534 {
  535 
  536         switch (si_code) {
  537         case SI_USER:
  538                 *lsi_code = LINUX_SI_USER;
  539                 break;
  540         case SI_KERNEL:
  541                 *lsi_code = LINUX_SI_KERNEL;
  542                 break;
  543         case SI_QUEUE:
  544                 *lsi_code = LINUX_SI_QUEUE;
  545                 break;
  546         case SI_TIMER:
  547                 *lsi_code = LINUX_SI_TIMER;
  548                 break;
  549         case SI_MESGQ:
  550                 *lsi_code = LINUX_SI_MESGQ;
  551                 break;
  552         case SI_ASYNCIO:
  553                 *lsi_code = LINUX_SI_ASYNCIO;
  554                 break;
  555         case SI_LWP:
  556                 *lsi_code = LINUX_SI_TKILL;
  557                 break;
  558         default:
  559                 *lsi_code = si_code;
  560                 break;
  561         }
  562 }
  563 
  564 void
  565 siginfo_to_lsiginfo(const siginfo_t *si, l_siginfo_t *lsi, l_int sig)
  566 {
  567 
  568         /* sig alredy converted */
  569         lsi->lsi_signo = sig;
  570         sicode_to_lsicode(si->si_code, &lsi->lsi_code);
  571 
  572         switch (si->si_code) {
  573         case SI_LWP:
  574                 lsi->lsi_pid = si->si_pid;
  575                 lsi->lsi_uid = si->si_uid;
  576                 break;
  577 
  578         case SI_TIMER:
  579                 lsi->lsi_int = si->si_value.sival_int;
  580                 lsi->lsi_ptr = PTROUT(si->si_value.sival_ptr);
  581                 lsi->lsi_tid = si->si_timerid;
  582                 break;
  583 
  584         case SI_QUEUE:
  585                 lsi->lsi_pid = si->si_pid;
  586                 lsi->lsi_uid = si->si_uid;
  587                 lsi->lsi_ptr = PTROUT(si->si_value.sival_ptr);
  588                 break;
  589 
  590         case SI_ASYNCIO:
  591                 lsi->lsi_int = si->si_value.sival_int;
  592                 lsi->lsi_ptr = PTROUT(si->si_value.sival_ptr);
  593                 break;
  594 
  595         default:
  596                 switch (sig) {
  597                 case LINUX_SIGPOLL:
  598                         /* XXX si_fd? */
  599                         lsi->lsi_band = si->si_band;
  600                         break;
  601 
  602                 case LINUX_SIGCHLD:
  603                         lsi->lsi_errno = 0;
  604                         lsi->lsi_pid = si->si_pid;
  605                         lsi->lsi_uid = si->si_uid;
  606 
  607                         if (si->si_code == CLD_STOPPED)
  608                                 lsi->lsi_status = bsd_to_linux_signal(si->si_status);
  609                         else if (si->si_code == CLD_CONTINUED)
  610                                 lsi->lsi_status = bsd_to_linux_signal(SIGCONT);
  611                         else
  612                                 lsi->lsi_status = si->si_status;
  613                         break;
  614 
  615                 case LINUX_SIGBUS:
  616                 case LINUX_SIGILL:
  617                 case LINUX_SIGFPE:
  618                 case LINUX_SIGSEGV:
  619                         lsi->lsi_addr = PTROUT(si->si_addr);
  620                         break;
  621 
  622                 default:
  623                         lsi->lsi_pid = si->si_pid;
  624                         lsi->lsi_uid = si->si_uid;
  625                         if (sig >= LINUX_SIGRTMIN) {
  626                                 lsi->lsi_int = si->si_value.sival_int;
  627                                 lsi->lsi_ptr = PTROUT(si->si_value.sival_ptr);
  628                         }
  629                         break;
  630                 }
  631                 break;
  632         }
  633 }
  634 
  635 void
  636 lsiginfo_to_ksiginfo(const l_siginfo_t *lsi, ksiginfo_t *ksi, int sig)
  637 {
  638 
  639         ksi->ksi_signo = sig;
  640         ksi->ksi_code = lsi->lsi_code;  /* XXX. Convert. */
  641         ksi->ksi_pid = lsi->lsi_pid;
  642         ksi->ksi_uid = lsi->lsi_uid;
  643         ksi->ksi_status = lsi->lsi_status;
  644         ksi->ksi_addr = PTRIN(lsi->lsi_addr);
  645         ksi->ksi_info.si_value.sival_int = lsi->lsi_int;
  646 }
  647 
  648 int
  649 linux_rt_sigqueueinfo(struct thread *td, struct linux_rt_sigqueueinfo_args *args)
  650 {
  651         l_siginfo_t linfo;
  652         struct proc *p;
  653         ksiginfo_t ksi;
  654         int error;
  655         int sig;
  656 
  657         if (!LINUX_SIG_VALID(args->sig))
  658                 return (EINVAL);
  659 
  660         error = copyin(args->info, &linfo, sizeof(linfo));
  661         if (error != 0)
  662                 return (error);
  663 
  664         if (linfo.lsi_code >= 0)
  665                 return (EPERM);
  666 
  667         sig = linux_to_bsd_signal(args->sig);
  668 
  669         error = ESRCH;
  670         if ((p = pfind_any(args->pid)) != NULL) {
  671                 error = p_cansignal(td, p, sig);
  672                 if (error != 0) {
  673                         PROC_UNLOCK(p);
  674                         return (error);
  675                 }
  676 
  677                 ksiginfo_init(&ksi);
  678                 lsiginfo_to_ksiginfo(&linfo, &ksi, sig);
  679                 error = tdsendsignal(p, NULL, sig, &ksi);
  680                 PROC_UNLOCK(p);
  681         }
  682 
  683         return (error);
  684 }
  685 
  686 int
  687 linux_rt_tgsigqueueinfo(struct thread *td, struct linux_rt_tgsigqueueinfo_args *args)
  688 {
  689         l_siginfo_t linfo;
  690         struct thread *tds;
  691         ksiginfo_t ksi;
  692         int error;
  693         int sig;
  694 
  695         if (!LINUX_SIG_VALID(args->sig))
  696                 return (EINVAL);
  697 
  698         error = copyin(args->uinfo, &linfo, sizeof(linfo));
  699         if (error != 0)
  700                 return (error);
  701 
  702         if (linfo.lsi_code >= 0)
  703                 return (EPERM);
  704 
  705         tds = linux_tdfind(td, args->tid, args->tgid);
  706         if (tds == NULL)
  707                 return (ESRCH);
  708 
  709         sig = linux_to_bsd_signal(args->sig);
  710         ksiginfo_init(&ksi);
  711         lsiginfo_to_ksiginfo(&linfo, &ksi, sig);
  712         return (linux_do_tkill(td, tds, &ksi));
  713 }
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FreeBSD/Linux Kernel Cross Reference sys/compat/linux/linux_signal.c

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