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linux_signal.c revision 1.49.20.4
      1  1.49.20.3        ad /*	$NetBSD: linux_signal.c,v 1.49.20.4 2007/01/30 13:51:33 ad Exp $	*/
      2  1.49.20.2        ad 
      3       1.16      fvdl /*-
      4       1.16      fvdl  * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
      5        1.1      fvdl  * All rights reserved.
      6        1.1      fvdl  *
      7       1.16      fvdl  * This code is derived from software contributed to The NetBSD Foundation
      8       1.16      fvdl  * by Frank van der Linden and Eric Haszlakiewicz.
      9       1.16      fvdl  *
     10        1.1      fvdl  * Redistribution and use in source and binary forms, with or without
     11        1.1      fvdl  * modification, are permitted provided that the following conditions
     12        1.1      fvdl  * are met:
     13        1.1      fvdl  * 1. Redistributions of source code must retain the above copyright
     14        1.1      fvdl  *    notice, this list of conditions and the following disclaimer.
     15        1.1      fvdl  * 2. Redistributions in binary form must reproduce the above copyright
     16        1.1      fvdl  *    notice, this list of conditions and the following disclaimer in the
     17        1.1      fvdl  *    documentation and/or other materials provided with the distribution.
     18        1.1      fvdl  * 3. All advertising materials mentioning features or use of this software
     19        1.1      fvdl  *    must display the following acknowledgement:
     20       1.16      fvdl  *	This product includes software developed by the NetBSD
     21       1.16      fvdl  *	Foundation, Inc. and its contributors.
     22       1.16      fvdl  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23       1.16      fvdl  *    contributors may be used to endorse or promote products derived
     24       1.16      fvdl  *    from this software without specific prior written permission.
     25        1.1      fvdl  *
     26       1.16      fvdl  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27       1.16      fvdl  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28       1.16      fvdl  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29       1.16      fvdl  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30       1.16      fvdl  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31       1.16      fvdl  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32       1.16      fvdl  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33       1.16      fvdl  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34       1.16      fvdl  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35       1.16      fvdl  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36       1.16      fvdl  * POSSIBILITY OF SUCH DAMAGE.
     37       1.16      fvdl  */
     38       1.16      fvdl /*
     39        1.1      fvdl  * heavily from: svr4_signal.c,v 1.7 1995/01/09 01:04:21 christos Exp
     40        1.1      fvdl  */
     41        1.1      fvdl 
     42       1.14       erh /*
     43       1.14       erh  *   Functions in multiarch:
     44       1.14       erh  *	linux_sys_signal	: linux_sig_notalpha.c
     45       1.14       erh  *	linux_sys_siggetmask	: linux_sig_notalpha.c
     46       1.14       erh  *	linux_sys_sigsetmask	: linux_sig_notalpha.c
     47       1.14       erh  *	linux_sys_pause		: linux_sig_notalpha.c
     48       1.14       erh  *	linux_sys_sigaction	: linux_sigaction.c
     49       1.14       erh  *
     50       1.14       erh  */
     51       1.14       erh 
     52       1.14       erh /*
     53       1.14       erh  *   Unimplemented:
     54       1.14       erh  *	linux_sys_rt_sigtimedwait	: sigsuspend w/timeout.
     55       1.14       erh  */
     56       1.32     lukem 
     57       1.32     lukem #include <sys/cdefs.h>
     58  1.49.20.3        ad __KERNEL_RCSID(0, "$NetBSD: linux_signal.c,v 1.49.20.4 2007/01/30 13:51:33 ad Exp $");
     59       1.21  drochner 
     60       1.21  drochner #define COMPAT_LINUX 1
     61       1.14       erh 
     62        1.1      fvdl #include <sys/param.h>
     63        1.1      fvdl #include <sys/systm.h>
     64        1.1      fvdl #include <sys/namei.h>
     65        1.1      fvdl #include <sys/proc.h>
     66        1.1      fvdl #include <sys/filedesc.h>
     67        1.1      fvdl #include <sys/ioctl.h>
     68        1.1      fvdl #include <sys/mount.h>
     69        1.1      fvdl #include <sys/kernel.h>
     70        1.1      fvdl #include <sys/signal.h>
     71        1.1      fvdl #include <sys/signalvar.h>
     72        1.1      fvdl #include <sys/malloc.h>
     73        1.1      fvdl 
     74        1.1      fvdl #include <sys/syscallargs.h>
     75        1.1      fvdl 
     76       1.15  christos #include <compat/linux/common/linux_types.h>
     77       1.15  christos #include <compat/linux/common/linux_signal.h>
     78       1.49      manu #include <compat/linux/common/linux_exec.h> /* For emul_linux */
     79       1.49      manu #include <compat/linux/common/linux_machdep.h> /* For LINUX_NPTL */
     80       1.49      manu #include <compat/linux/common/linux_emuldata.h> /* for linux_emuldata */
     81       1.17       erh #include <compat/linux/common/linux_siginfo.h>
     82       1.45      fvdl #include <compat/linux/common/linux_sigevent.h>
     83       1.15  christos #include <compat/linux/common/linux_util.h>
     84       1.15  christos 
     85        1.1      fvdl #include <compat/linux/linux_syscallargs.h>
     86        1.1      fvdl 
     87       1.14       erh /* Locally used defines (in bsd<->linux conversion functions): */
     88       1.11     perry #define	linux_sigemptyset(s)	memset((s), 0, sizeof(*(s)))
     89       1.20     itohy #define	linux_sigismember(s, n)	((s)->sig[((n) - 1) / LINUX__NSIG_BPW]	\
     90       1.20     itohy 					& (1 << ((n) - 1) % LINUX__NSIG_BPW))
     91       1.20     itohy #define	linux_sigaddset(s, n)	((s)->sig[((n) - 1) / LINUX__NSIG_BPW]	\
     92       1.20     itohy 					|= (1 << ((n) - 1) % LINUX__NSIG_BPW))
     93        1.6   mycroft 
     94       1.36  christos #ifdef DEBUG_LINUX
     95       1.36  christos #define DPRINTF(a)	uprintf a
     96       1.36  christos #else
     97       1.36  christos #define DPRINTF(a)
     98       1.36  christos #endif
     99       1.36  christos 
    100       1.37  christos extern const int native_to_linux_signo[];
    101       1.37  christos extern const int linux_to_native_signo[];
    102        1.6   mycroft 
    103       1.14       erh /*
    104       1.20     itohy  * Convert between Linux and BSD signal sets.
    105       1.14       erh  */
    106       1.20     itohy #if LINUX__NSIG_WORDS > 1
    107        1.6   mycroft void
    108       1.33  christos linux_old_extra_to_native_sigset(bss, lss, extra)
    109       1.33  christos 	sigset_t *bss;
    110       1.14       erh 	const linux_old_sigset_t *lss;
    111       1.20     itohy 	const unsigned long *extra;
    112       1.20     itohy {
    113       1.20     itohy 	linux_sigset_t lsnew;
    114       1.20     itohy 
    115       1.20     itohy 	/* convert old sigset to new sigset */
    116       1.20     itohy 	linux_sigemptyset(&lsnew);
    117       1.20     itohy 	lsnew.sig[0] = *lss;
    118       1.20     itohy 	if (extra)
    119       1.33  christos 		memcpy(&lsnew.sig[1], extra,
    120       1.33  christos 		    sizeof(linux_sigset_t) - sizeof(linux_old_sigset_t));
    121       1.20     itohy 
    122       1.33  christos 	linux_to_native_sigset(bss, &lsnew);
    123       1.20     itohy }
    124       1.20     itohy 
    125       1.20     itohy void
    126       1.33  christos native_to_linux_old_extra_sigset(lss, extra, bss)
    127       1.20     itohy 	linux_old_sigset_t *lss;
    128       1.20     itohy 	unsigned long *extra;
    129       1.33  christos 	const sigset_t *bss;
    130       1.20     itohy {
    131       1.20     itohy 	linux_sigset_t lsnew;
    132       1.20     itohy 
    133       1.33  christos 	native_to_linux_sigset(&lsnew, bss);
    134       1.20     itohy 
    135       1.20     itohy 	/* convert new sigset to old sigset */
    136       1.20     itohy 	*lss = lsnew.sig[0];
    137       1.20     itohy 	if (extra)
    138       1.33  christos 		memcpy(extra, &lsnew.sig[1],
    139       1.33  christos 		    sizeof(linux_sigset_t) - sizeof(linux_old_sigset_t));
    140       1.20     itohy }
    141       1.43      manu #endif /* LINUX__NSIG_WORDS > 1 */
    142       1.20     itohy 
    143       1.20     itohy void
    144       1.33  christos linux_to_native_sigset(bss, lss)
    145       1.33  christos 	sigset_t *bss;
    146       1.20     itohy 	const linux_sigset_t *lss;
    147        1.1      fvdl {
    148        1.1      fvdl 	int i, newsig;
    149        1.1      fvdl 
    150        1.6   mycroft 	sigemptyset(bss);
    151       1.20     itohy 	for (i = 1; i < LINUX__NSIG; i++) {
    152        1.6   mycroft 		if (linux_sigismember(lss, i)) {
    153       1.37  christos 			newsig = linux_to_native_signo[i];
    154        1.1      fvdl 			if (newsig)
    155        1.6   mycroft 				sigaddset(bss, newsig);
    156        1.1      fvdl 		}
    157        1.1      fvdl 	}
    158        1.1      fvdl }
    159        1.1      fvdl 
    160        1.1      fvdl void
    161       1.33  christos native_to_linux_sigset(lss, bss)
    162       1.33  christos 	linux_sigset_t *lss;
    163        1.1      fvdl 	const sigset_t *bss;
    164        1.1      fvdl {
    165        1.1      fvdl 	int i, newsig;
    166       1.20     itohy 
    167        1.6   mycroft 	linux_sigemptyset(lss);
    168        1.6   mycroft 	for (i = 1; i < NSIG; i++) {
    169        1.6   mycroft 		if (sigismember(bss, i)) {
    170       1.37  christos 			newsig = native_to_linux_signo[i];
    171        1.1      fvdl 			if (newsig)
    172        1.6   mycroft 				linux_sigaddset(lss, newsig);
    173        1.1      fvdl 		}
    174        1.1      fvdl 	}
    175        1.1      fvdl }
    176        1.1      fvdl 
    177       1.34  christos unsigned int
    178       1.34  christos native_to_linux_sigflags(bsf)
    179       1.34  christos 	const int bsf;
    180       1.33  christos {
    181       1.34  christos 	unsigned int lsf = 0;
    182       1.34  christos 	if ((bsf & SA_NOCLDSTOP) != 0)
    183       1.34  christos 		lsf |= LINUX_SA_NOCLDSTOP;
    184       1.34  christos 	if ((bsf & SA_NOCLDWAIT) != 0)
    185       1.34  christos 		lsf |= LINUX_SA_NOCLDWAIT;
    186       1.34  christos 	if ((bsf & SA_ONSTACK) != 0)
    187       1.34  christos 		lsf |= LINUX_SA_ONSTACK;
    188       1.34  christos 	if ((bsf & SA_RESTART) != 0)
    189       1.34  christos 		lsf |= LINUX_SA_RESTART;
    190       1.34  christos 	if ((bsf & SA_NODEFER) != 0)
    191       1.34  christos 		lsf |= LINUX_SA_NOMASK;
    192       1.34  christos 	if ((bsf & SA_RESETHAND) != 0)
    193       1.34  christos 		lsf |= LINUX_SA_ONESHOT;
    194       1.34  christos 	if ((bsf & SA_SIGINFO) != 0)
    195       1.34  christos 		lsf |= LINUX_SA_SIGINFO;
    196       1.34  christos 	return lsf;
    197       1.33  christos }
    198       1.33  christos 
    199       1.34  christos int
    200       1.34  christos linux_to_native_sigflags(lsf)
    201       1.34  christos 	const unsigned long lsf;
    202       1.33  christos {
    203       1.34  christos 	int bsf = 0;
    204       1.34  christos 	if ((lsf & LINUX_SA_NOCLDSTOP) != 0)
    205       1.34  christos 		bsf |= SA_NOCLDSTOP;
    206       1.34  christos 	if ((lsf & LINUX_SA_NOCLDWAIT) != 0)
    207       1.34  christos 		bsf |= SA_NOCLDWAIT;
    208       1.34  christos 	if ((lsf & LINUX_SA_ONSTACK) != 0)
    209       1.34  christos 		bsf |= SA_ONSTACK;
    210       1.34  christos 	if ((lsf & LINUX_SA_RESTART) != 0)
    211       1.34  christos 		bsf |= SA_RESTART;
    212       1.34  christos 	if ((lsf & LINUX_SA_ONESHOT) != 0)
    213       1.34  christos 		bsf |= SA_RESETHAND;
    214       1.34  christos 	if ((lsf & LINUX_SA_NOMASK) != 0)
    215       1.34  christos 		bsf |= SA_NODEFER;
    216       1.34  christos 	if ((lsf & LINUX_SA_SIGINFO) != 0)
    217       1.34  christos 		bsf |= SA_SIGINFO;
    218  1.49.20.2        ad 	if ((lsf & ~LINUX_SA_ALLBITS) != 0) {
    219       1.36  christos 		DPRINTF(("linux_old_to_native_sigflags: "
    220       1.36  christos 		    "%lx extra bits ignored\n", lsf));
    221  1.49.20.2        ad 	}
    222       1.34  christos 	return bsf;
    223       1.33  christos }
    224       1.33  christos 
    225        1.1      fvdl /*
    226       1.46      manu  * Convert between Linux and BSD sigaction structures.
    227        1.1      fvdl  */
    228        1.1      fvdl void
    229       1.33  christos linux_old_to_native_sigaction(bsa, lsa)
    230       1.14       erh 	struct sigaction *bsa;
    231       1.33  christos 	const struct linux_old_sigaction *lsa;
    232       1.14       erh {
    233       1.39  christos 	bsa->sa_handler = lsa->linux_sa_handler;
    234       1.39  christos 	linux_old_to_native_sigset(&bsa->sa_mask, &lsa->linux_sa_mask);
    235       1.39  christos 	bsa->sa_flags = linux_to_native_sigflags(lsa->linux_sa_flags);
    236       1.14       erh }
    237       1.14       erh 
    238       1.14       erh void
    239       1.33  christos native_to_linux_old_sigaction(lsa, bsa)
    240       1.14       erh 	struct linux_old_sigaction *lsa;
    241       1.33  christos 	const struct sigaction *bsa;
    242       1.14       erh {
    243       1.39  christos 	lsa->linux_sa_handler = bsa->sa_handler;
    244       1.39  christos 	native_to_linux_old_sigset(&lsa->linux_sa_mask, &bsa->sa_mask);
    245       1.39  christos 	lsa->linux_sa_flags = native_to_linux_sigflags(bsa->sa_flags);
    246       1.34  christos #ifndef __alpha__
    247       1.39  christos 	lsa->linux_sa_restorer = NULL;
    248       1.34  christos #endif
    249       1.14       erh }
    250       1.14       erh 
    251       1.14       erh /* ...and the new sigaction conversion funcs. */
    252       1.14       erh void
    253       1.33  christos linux_to_native_sigaction(bsa, lsa)
    254        1.1      fvdl 	struct sigaction *bsa;
    255       1.33  christos 	const struct linux_sigaction *lsa;
    256        1.1      fvdl {
    257       1.39  christos 	bsa->sa_handler = lsa->linux_sa_handler;
    258       1.39  christos 	linux_to_native_sigset(&bsa->sa_mask, &lsa->linux_sa_mask);
    259       1.39  christos 	bsa->sa_flags = linux_to_native_sigflags(lsa->linux_sa_flags);
    260        1.1      fvdl }
    261        1.1      fvdl 
    262        1.1      fvdl void
    263       1.33  christos native_to_linux_sigaction(lsa, bsa)
    264        1.1      fvdl 	struct linux_sigaction *lsa;
    265       1.33  christos 	const struct sigaction *bsa;
    266        1.1      fvdl {
    267       1.39  christos 	lsa->linux_sa_handler = bsa->sa_handler;
    268       1.39  christos 	native_to_linux_sigset(&lsa->linux_sa_mask, &bsa->sa_mask);
    269       1.39  christos 	lsa->linux_sa_flags = native_to_linux_sigflags(bsa->sa_flags);
    270       1.34  christos #ifndef __alpha__
    271       1.39  christos 	lsa->linux_sa_restorer = NULL;
    272       1.34  christos #endif
    273        1.1      fvdl }
    274        1.1      fvdl 
    275       1.14       erh /* ----------------------------------------------------------------------- */
    276        1.1      fvdl 
    277        1.1      fvdl /*
    278        1.1      fvdl  * The Linux sigaction() system call. Do the usual conversions,
    279        1.1      fvdl  * and just call sigaction(). Some flags and values are silently
    280        1.1      fvdl  * ignored (see above).
    281        1.1      fvdl  */
    282        1.1      fvdl int
    283  1.49.20.2        ad linux_sys_rt_sigaction(struct lwp *l, void *v, register_t *retval)
    284        1.8   thorpej {
    285       1.14       erh 	struct linux_sys_rt_sigaction_args /* {
    286        1.1      fvdl 		syscallarg(int) signum;
    287       1.12   mycroft 		syscallarg(const struct linux_sigaction *) nsa;
    288        1.1      fvdl 		syscallarg(struct linux_sigaction *) osa;
    289       1.14       erh 		syscallarg(size_t) sigsetsize;
    290        1.8   thorpej 	} */ *uap = v;
    291       1.12   mycroft 	struct linux_sigaction nlsa, olsa;
    292       1.12   mycroft 	struct sigaction nbsa, obsa;
    293       1.25      tron 	int error, sig;
    294       1.46      manu 	void *tramp = NULL;
    295       1.46      manu 	int vers = 0;
    296       1.47       mrg #if defined __amd64__
    297  1.49.20.1        ad 	struct sigacts *ps = l->l_proc->p_sigacts;
    298       1.46      manu #endif
    299        1.1      fvdl 
    300       1.14       erh 	if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t))
    301       1.14       erh 		return (EINVAL);
    302       1.14       erh 
    303       1.12   mycroft 	if (SCARG(uap, nsa)) {
    304       1.12   mycroft 		error = copyin(SCARG(uap, nsa), &nlsa, sizeof(nlsa));
    305       1.12   mycroft 		if (error)
    306       1.12   mycroft 			return (error);
    307       1.33  christos 		linux_to_native_sigaction(&nbsa, &nlsa);
    308       1.12   mycroft 	}
    309       1.46      manu 
    310       1.25      tron 	sig = SCARG(uap, signum);
    311       1.25      tron 	if (sig < 0 || sig >= LINUX__NSIG)
    312       1.25      tron 		return (EINVAL);
    313       1.37  christos 	if (sig > 0 && !linux_to_native_signo[sig]) {
    314       1.29        tv 		/* Pretend that we did something useful for unknown signals. */
    315       1.29        tv 		obsa.sa_handler = SIG_IGN;
    316       1.29        tv 		sigemptyset(&obsa.sa_mask);
    317       1.29        tv 		obsa.sa_flags = 0;
    318       1.29        tv 	} else {
    319       1.46      manu #if defined __amd64__
    320       1.46      manu 		if (nlsa.linux_sa_flags & LINUX_SA_RESTORER) {
    321       1.46      manu 			if ((tramp = nlsa.linux_sa_restorer) != NULL)
    322       1.46      manu 				vers = 2; /* XXX arch dependant */
    323       1.46      manu 		}
    324       1.46      manu #endif
    325       1.46      manu 
    326  1.49.20.1        ad 		error = sigaction1(l, linux_to_native_signo[sig],
    327       1.38   thorpej 		    SCARG(uap, nsa) ? &nbsa : NULL,
    328       1.38   thorpej 		    SCARG(uap, osa) ? &obsa : NULL,
    329       1.46      manu 		    tramp, vers);
    330       1.29        tv 		if (error)
    331       1.29        tv 			return (error);
    332       1.29        tv 	}
    333       1.12   mycroft 	if (SCARG(uap, osa)) {
    334       1.33  christos 		native_to_linux_sigaction(&olsa, &obsa);
    335       1.46      manu 
    336       1.46      manu #if defined __amd64__
    337       1.46      manu 		if (ps->sa_sigdesc[sig].sd_vers != 0) {
    338       1.46      manu 			olsa.linux_sa_restorer = ps->sa_sigdesc[sig].sd_tramp;
    339       1.46      manu 			olsa.linux_sa_flags |= LINUX_SA_RESTORER;
    340       1.46      manu 		}
    341       1.46      manu #endif
    342       1.46      manu 
    343       1.12   mycroft 		error = copyout(&olsa, SCARG(uap, osa), sizeof(olsa));
    344       1.12   mycroft 		if (error)
    345       1.12   mycroft 			return (error);
    346        1.1      fvdl 	}
    347       1.12   mycroft 	return (0);
    348        1.1      fvdl }
    349        1.1      fvdl 
    350        1.1      fvdl int
    351  1.49.20.1        ad linux_sigprocmask1(l, how, set, oset)
    352  1.49.20.1        ad 	struct lwp *l;
    353       1.17       erh 	int how;
    354       1.17       erh 	const linux_old_sigset_t *set;
    355       1.17       erh 	linux_old_sigset_t *oset;
    356        1.8   thorpej {
    357  1.49.20.3        ad 	struct proc *p = l->l_proc;
    358       1.14       erh 	linux_old_sigset_t nlss, olss;
    359       1.12   mycroft 	sigset_t nbss, obss;
    360       1.12   mycroft 	int error;
    361        1.1      fvdl 
    362       1.17       erh 	switch (how) {
    363        1.1      fvdl 	case LINUX_SIG_BLOCK:
    364       1.12   mycroft 		how = SIG_BLOCK;
    365        1.1      fvdl 		break;
    366        1.1      fvdl 	case LINUX_SIG_UNBLOCK:
    367       1.12   mycroft 		how = SIG_UNBLOCK;
    368        1.1      fvdl 		break;
    369        1.1      fvdl 	case LINUX_SIG_SETMASK:
    370       1.12   mycroft 		how = SIG_SETMASK;
    371        1.1      fvdl 		break;
    372        1.1      fvdl 	default:
    373       1.12   mycroft 		return (EINVAL);
    374        1.1      fvdl 	}
    375        1.1      fvdl 
    376       1.17       erh 	if (set) {
    377       1.17       erh 		error = copyin(set, &nlss, sizeof(nlss));
    378       1.12   mycroft 		if (error)
    379       1.12   mycroft 			return (error);
    380       1.33  christos 		linux_old_to_native_sigset(&nbss, &nlss);
    381       1.12   mycroft 	}
    382  1.49.20.3        ad 	mutex_enter(&p->p_smutex);
    383  1.49.20.1        ad 	error = sigprocmask1(l, how,
    384       1.27      tron 	    set ? &nbss : NULL, oset ? &obss : NULL);
    385  1.49.20.3        ad 	mutex_exit(&p->p_smutex);
    386       1.12   mycroft 	if (error)
    387       1.42     perry 		return (error);
    388       1.17       erh 	if (oset) {
    389       1.33  christos 		native_to_linux_old_sigset(&olss, &obss);
    390       1.17       erh 		error = copyout(&olss, oset, sizeof(olss));
    391       1.12   mycroft 		if (error)
    392       1.12   mycroft 			return (error);
    393       1.42     perry 	}
    394       1.12   mycroft 	return (error);
    395       1.17       erh }
    396       1.17       erh 
    397       1.17       erh int
    398  1.49.20.2        ad linux_sys_rt_sigprocmask(struct lwp *l, void *v, register_t *retval)
    399       1.17       erh {
    400       1.17       erh 	struct linux_sys_rt_sigprocmask_args /* {
    401       1.17       erh 		syscallarg(int) how;
    402       1.17       erh 		syscallarg(const linux_sigset_t *) set;
    403       1.17       erh 		syscallarg(linux_sigset_t *) oset;
    404       1.17       erh 		syscallarg(size_t) sigsetsize;
    405       1.17       erh 	} */ *uap = v;
    406       1.24      fvdl 	linux_sigset_t nlss, olss, *oset;
    407       1.24      fvdl 	const linux_sigset_t *set;
    408  1.49.20.3        ad 	struct proc *p = l->l_proc;
    409       1.24      fvdl 	sigset_t nbss, obss;
    410       1.24      fvdl 	int error, how;
    411       1.24      fvdl 
    412       1.24      fvdl 	if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t))
    413       1.24      fvdl 		return (EINVAL);
    414       1.24      fvdl 
    415       1.24      fvdl 	switch (SCARG(uap, how)) {
    416       1.24      fvdl 	case LINUX_SIG_BLOCK:
    417       1.24      fvdl 		how = SIG_BLOCK;
    418       1.24      fvdl 		break;
    419       1.24      fvdl 	case LINUX_SIG_UNBLOCK:
    420       1.24      fvdl 		how = SIG_UNBLOCK;
    421       1.24      fvdl 		break;
    422       1.24      fvdl 	case LINUX_SIG_SETMASK:
    423       1.24      fvdl 		how = SIG_SETMASK;
    424       1.24      fvdl 		break;
    425       1.24      fvdl 	default:
    426       1.24      fvdl 		return (EINVAL);
    427       1.17       erh 	}
    428       1.17       erh 
    429       1.24      fvdl 	set = SCARG(uap, set);
    430       1.24      fvdl 	oset = SCARG(uap, oset);
    431       1.24      fvdl 
    432       1.24      fvdl 	if (set) {
    433       1.24      fvdl 		error = copyin(set, &nlss, sizeof(nlss));
    434       1.24      fvdl 		if (error)
    435       1.24      fvdl 			return (error);
    436       1.33  christos 		linux_to_native_sigset(&nbss, &nlss);
    437       1.24      fvdl 	}
    438  1.49.20.3        ad 	mutex_enter(&p->p_smutex);
    439  1.49.20.1        ad 	error = sigprocmask1(l, how,
    440       1.27      tron 	    set ? &nbss : NULL, oset ? &obss : NULL);
    441  1.49.20.3        ad 	mutex_exit(&p->p_smutex);
    442       1.28      tron 	if (!error && oset) {
    443       1.33  christos 		native_to_linux_sigset(&olss, &obss);
    444       1.24      fvdl 		error = copyout(&olss, oset, sizeof(olss));
    445       1.42     perry 	}
    446       1.24      fvdl 	return (error);
    447        1.1      fvdl }
    448        1.1      fvdl 
    449        1.1      fvdl int
    450  1.49.20.2        ad linux_sys_rt_sigpending(struct lwp *l, void *v, register_t *retval)
    451        1.1      fvdl {
    452       1.14       erh 	struct linux_sys_rt_sigpending_args /* {
    453       1.14       erh 		syscallarg(linux_sigset_t *) set;
    454       1.14       erh 		syscallarg(size_t) sigsetsize;
    455       1.14       erh 	} */ *uap = v;
    456       1.12   mycroft 	sigset_t bss;
    457       1.12   mycroft 	linux_sigset_t lss;
    458        1.6   mycroft 
    459       1.14       erh 	if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t))
    460       1.14       erh 		return (EINVAL);
    461       1.14       erh 
    462  1.49.20.1        ad 	sigpending1(l, &bss);
    463       1.33  christos 	native_to_linux_sigset(&lss, &bss);
    464       1.14       erh 	return copyout(&lss, SCARG(uap, set), sizeof(lss));
    465        1.1      fvdl }
    466       1.24      fvdl 
    467       1.43      manu #ifndef __amd64__
    468        1.1      fvdl int
    469  1.49.20.2        ad linux_sys_sigpending(struct lwp *l, void *v, register_t *retval)
    470        1.8   thorpej {
    471        1.9   mycroft 	struct linux_sys_sigpending_args /* {
    472       1.14       erh 		syscallarg(linux_old_sigset_t *) mask;
    473        1.8   thorpej 	} */ *uap = v;
    474       1.12   mycroft 	sigset_t bss;
    475       1.14       erh 	linux_old_sigset_t lss;
    476        1.1      fvdl 
    477  1.49.20.1        ad 	sigpending1(l, &bss);
    478       1.33  christos 	native_to_linux_old_sigset(&lss, &bss);
    479       1.12   mycroft 	return copyout(&lss, SCARG(uap, set), sizeof(lss));
    480        1.1      fvdl }
    481        1.1      fvdl 
    482        1.1      fvdl int
    483  1.49.20.2        ad linux_sys_sigsuspend(struct lwp *l, void *v, register_t *retval)
    484        1.8   thorpej {
    485        1.9   mycroft 	struct linux_sys_sigsuspend_args /* {
    486        1.3      fvdl 		syscallarg(caddr_t) restart;
    487        1.3      fvdl 		syscallarg(int) oldmask;
    488        1.1      fvdl 		syscallarg(int) mask;
    489        1.8   thorpej 	} */ *uap = v;
    490       1.14       erh 	linux_old_sigset_t lss;
    491       1.14       erh 	sigset_t bss;
    492       1.14       erh 
    493       1.14       erh 	lss = SCARG(uap, mask);
    494       1.33  christos 	linux_old_to_native_sigset(&bss, &lss);
    495  1.49.20.1        ad 	return (sigsuspend1(l, &bss));
    496       1.14       erh }
    497       1.43      manu #endif /* __amd64__ */
    498       1.43      manu 
    499       1.14       erh int
    500  1.49.20.2        ad linux_sys_rt_sigsuspend(struct lwp *l, void *v, register_t *retval)
    501       1.14       erh {
    502       1.14       erh 	struct linux_sys_rt_sigsuspend_args /* {
    503       1.14       erh 		syscallarg(linux_sigset_t *) unewset;
    504       1.14       erh 		syscallarg(size_t) sigsetsize;
    505       1.14       erh 	} */ *uap = v;
    506       1.12   mycroft 	linux_sigset_t lss;
    507       1.12   mycroft 	sigset_t bss;
    508       1.14       erh 	int error;
    509       1.14       erh 
    510       1.14       erh 	if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t))
    511       1.14       erh 		return (EINVAL);
    512       1.14       erh 
    513       1.14       erh 	error = copyin(SCARG(uap, unewset), &lss, sizeof(linux_sigset_t));
    514       1.14       erh 	if (error)
    515       1.14       erh 		return (error);
    516       1.14       erh 
    517       1.33  christos 	linux_to_native_sigset(&bss, &lss);
    518       1.14       erh 
    519  1.49.20.1        ad 	return (sigsuspend1(l, &bss));
    520        1.3      fvdl }
    521        1.3      fvdl 
    522        1.3      fvdl /*
    523       1.14       erh  * Once more: only a signal conversion is needed.
    524       1.14       erh  * Note: also used as sys_rt_queueinfo.  The info field is ignored.
    525        1.3      fvdl  */
    526        1.3      fvdl int
    527       1.40   thorpej linux_sys_rt_queueinfo(l, v, retval)
    528       1.40   thorpej 	struct lwp *l;
    529       1.14       erh 	void *v;
    530        1.3      fvdl 	register_t *retval;
    531       1.14       erh {
    532       1.14       erh 	/* XXX XAX This isn't this really int, int, siginfo_t *, is it? */
    533       1.14       erh #if 0
    534       1.14       erh 	struct linux_sys_rt_queueinfo_args /* {
    535       1.14       erh 		syscallarg(int) pid;
    536       1.14       erh 		syscallarg(int) signum;
    537       1.14       erh 		syscallarg(siginfo_t *) uinfo;
    538       1.14       erh 	} */ *uap = v;
    539       1.14       erh #endif
    540        1.3      fvdl 
    541       1.14       erh 	/* XXX To really implement this we need to	*/
    542       1.14       erh 	/* XXX keep a list of queued signals somewhere.	*/
    543       1.40   thorpej 	return (linux_sys_kill(l, v, retval));
    544        1.1      fvdl }
    545        1.1      fvdl 
    546        1.1      fvdl int
    547       1.40   thorpej linux_sys_kill(l, v, retval)
    548       1.40   thorpej 	struct lwp *l;
    549        1.8   thorpej 	void *v;
    550        1.8   thorpej 	register_t *retval;
    551        1.8   thorpej {
    552        1.9   mycroft 	struct linux_sys_kill_args /* {
    553        1.1      fvdl 		syscallarg(int) pid;
    554        1.1      fvdl 		syscallarg(int) signum;
    555        1.8   thorpej 	} */ *uap = v;
    556       1.40   thorpej 
    557        1.9   mycroft 	struct sys_kill_args ka;
    558       1.25      tron 	int sig;
    559        1.6   mycroft 
    560        1.6   mycroft 	SCARG(&ka, pid) = SCARG(uap, pid);
    561       1.25      tron 	sig = SCARG(uap, signum);
    562       1.25      tron 	if (sig < 0 || sig >= LINUX__NSIG)
    563       1.25      tron 		return (EINVAL);
    564       1.37  christos 	SCARG(&ka, signum) = linux_to_native_signo[sig];
    565       1.40   thorpej 	return sys_kill(l, &ka, retval);
    566        1.1      fvdl }
    567       1.30  christos 
    568       1.30  christos #ifdef LINUX_SS_ONSTACK
    569       1.30  christos static void linux_to_native_sigaltstack __P((struct sigaltstack *,
    570       1.30  christos     const struct linux_sigaltstack *));
    571       1.30  christos 
    572       1.30  christos static void
    573       1.30  christos linux_to_native_sigaltstack(bss, lss)
    574       1.30  christos 	struct sigaltstack *bss;
    575       1.30  christos 	const struct linux_sigaltstack *lss;
    576       1.30  christos {
    577       1.30  christos 	bss->ss_sp = lss->ss_sp;
    578       1.30  christos 	bss->ss_size = lss->ss_size;
    579       1.30  christos 	if (lss->ss_flags & LINUX_SS_ONSTACK)
    580       1.30  christos 	    bss->ss_flags = SS_ONSTACK;
    581       1.30  christos 	else if (lss->ss_flags & LINUX_SS_DISABLE)
    582       1.30  christos 	    bss->ss_flags = SS_DISABLE;
    583       1.30  christos 	else
    584       1.30  christos 	    bss->ss_flags = 0;
    585       1.30  christos }
    586       1.30  christos 
    587       1.41  christos void
    588       1.30  christos native_to_linux_sigaltstack(lss, bss)
    589       1.30  christos 	struct linux_sigaltstack *lss;
    590       1.30  christos 	const struct sigaltstack *bss;
    591       1.30  christos {
    592       1.30  christos 	lss->ss_sp = bss->ss_sp;
    593       1.30  christos 	lss->ss_size = bss->ss_size;
    594       1.30  christos 	if (bss->ss_flags & SS_ONSTACK)
    595       1.30  christos 	    lss->ss_flags = LINUX_SS_ONSTACK;
    596       1.30  christos 	else if (bss->ss_flags & SS_DISABLE)
    597       1.30  christos 	    lss->ss_flags = LINUX_SS_DISABLE;
    598       1.30  christos 	else
    599       1.30  christos 	    lss->ss_flags = 0;
    600       1.30  christos }
    601       1.30  christos 
    602       1.30  christos int
    603  1.49.20.2        ad linux_sys_sigaltstack(struct lwp *l, void *v, register_t *retval)
    604       1.30  christos {
    605       1.30  christos 	struct linux_sys_sigaltstack_args /* {
    606       1.30  christos 		syscallarg(const struct linux_sigaltstack *) ss;
    607       1.30  christos 		syscallarg(struct linux_sigaltstack *) oss;
    608       1.30  christos 	} */ *uap = v;
    609       1.30  christos 	struct linux_sigaltstack ss;
    610       1.48  christos 	struct sigaltstack nss;
    611  1.49.20.1        ad 	struct proc *p = l->l_proc;
    612  1.49.20.1        ad 	int error = 0;
    613       1.30  christos 
    614       1.48  christos 	if (SCARG(uap, oss)) {
    615  1.49.20.4        ad 		native_to_linux_sigaltstack(&ss, &l->l_sigstk);
    616       1.48  christos 		if ((error = copyout(&ss, SCARG(uap, oss), sizeof(ss))) != 0)
    617       1.48  christos 			return error;
    618       1.48  christos 	}
    619       1.48  christos 
    620       1.30  christos 	if (SCARG(uap, ss) != NULL) {
    621       1.30  christos 		if ((error = copyin(SCARG(uap, ss), &ss, sizeof(ss))) != 0)
    622       1.30  christos 			return error;
    623       1.30  christos 		linux_to_native_sigaltstack(&nss, &ss);
    624       1.30  christos 
    625  1.49.20.1        ad 		mutex_enter(&p->p_smutex);
    626  1.49.20.1        ad 
    627       1.48  christos 		if (nss.ss_flags & ~SS_ALLBITS)
    628  1.49.20.1        ad 			error = EINVAL;
    629  1.49.20.1        ad 		else if (nss.ss_flags & SS_DISABLE) {
    630  1.49.20.4        ad 			if (l->l_sigstk.ss_flags & SS_ONSTACK)
    631  1.49.20.1        ad 				error = EINVAL;
    632  1.49.20.1        ad 		} else if (nss.ss_size < LINUX_MINSIGSTKSZ)
    633  1.49.20.1        ad 			error = ENOMEM;
    634       1.30  christos 
    635  1.49.20.1        ad 		if (error == 0)
    636  1.49.20.4        ad 			l->l_sigstk = nss;
    637  1.49.20.1        ad 
    638  1.49.20.1        ad 		mutex_exit(&p->p_smutex);
    639       1.30  christos 	}
    640       1.48  christos 
    641  1.49.20.1        ad 	return error;
    642       1.30  christos }
    643       1.44       jmc #endif /* LINUX_SS_ONSTACK */
    644       1.49      manu 
    645       1.49      manu #ifdef LINUX_NPTL
    646       1.49      manu int
    647       1.49      manu linux_sys_tkill(l, v, retval)
    648       1.49      manu 	struct lwp *l;
    649       1.49      manu 	void *v;
    650       1.49      manu 	register_t *retval;
    651       1.49      manu {
    652       1.49      manu 	struct linux_sys_tkill_args /* {
    653       1.49      manu 		syscallarg(int) tid;
    654       1.49      manu 		syscallarg(int) sig;
    655       1.49      manu 	} */ *uap = v;
    656       1.49      manu 	struct linux_sys_kill_args cup;
    657       1.49      manu 
    658       1.49      manu 	/* We use the PID as the TID ... */
    659       1.49      manu 	SCARG(&cup, pid) = SCARG(uap, tid);
    660       1.49      manu 	SCARG(&cup, signum) = SCARG(uap, sig);
    661       1.49      manu 
    662       1.49      manu 	return linux_sys_kill(l, &cup, retval);
    663       1.49      manu }
    664       1.49      manu 
    665       1.49      manu int
    666       1.49      manu linux_sys_tgkill(l, v, retval)
    667       1.49      manu 	struct lwp *l;
    668       1.49      manu 	void *v;
    669       1.49      manu 	register_t *retval;
    670       1.49      manu {
    671       1.49      manu 	struct linux_sys_tgkill_args /* {
    672       1.49      manu 		syscallarg(int) tgid;
    673       1.49      manu 		syscallarg(int) tid;
    674       1.49      manu 		syscallarg(int) sig;
    675       1.49      manu 	} */ *uap = v;
    676       1.49      manu 	struct linux_sys_kill_args cup;
    677       1.49      manu 	struct linux_emuldata *led;
    678       1.49      manu 	struct proc *p;
    679       1.49      manu 
    680       1.49      manu 	SCARG(&cup, pid) = SCARG(uap, tid);
    681       1.49      manu 	SCARG(&cup, signum) = SCARG(uap, sig);
    682       1.49      manu 
    683       1.49      manu 	if (SCARG(uap, tgid) == -1)
    684       1.49      manu 		return linux_sys_kill(l, &cup, retval);
    685       1.49      manu 
    686       1.49      manu 	/* We use the PID as the TID, but make sure the group ID is right */
    687       1.49      manu 	if ((p = pfind(SCARG(uap, tid))) == NULL)
    688       1.49      manu 		return ESRCH;
    689       1.49      manu 
    690       1.49      manu 	if (p->p_emul != &emul_linux)
    691       1.49      manu 		return ESRCH;
    692       1.49      manu 
    693       1.49      manu 	led = p->p_emuldata;
    694       1.49      manu 
    695       1.49      manu 	if (led->s->group_pid != SCARG(uap, tgid))
    696       1.49      manu 		return ESRCH;
    697       1.49      manu 
    698       1.49      manu 	return linux_sys_kill(l, &cup, retval);
    699       1.49      manu }
    700       1.49      manu #endif /* LINUX_NPTL */
    701