NetBSD-5.0.2/sys/compat/svr4_32/svr4_32_signal.c
/* $NetBSD: svr4_32_signal.c,v 1.26 2008/04/28 20:23:46 martin Exp $ */
/*-
* Copyright (c) 1994, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas and by Charles M. Hannum.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: svr4_32_signal.c,v 1.26 2008/04/28 20:23:46 martin Exp $");
#if defined(_KERNEL_OPT)
#include "opt_compat_svr4.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/filedesc.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/kernel.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#include <sys/malloc.h>
#include <sys/wait.h>
#include <sys/syscallargs.h>
#include <compat/svr4_32/svr4_32_types.h>
#include <compat/svr4_32/svr4_32_signal.h>
#include <compat/svr4_32/svr4_32_lwp.h>
#include <compat/svr4_32/svr4_32_ucontext.h>
#include <compat/svr4_32/svr4_32_syscallargs.h>
#include <compat/svr4_32/svr4_32_util.h>
#include <compat/common/compat_sigaltstack.h>
#define svr4_sigmask(n) (1 << (((n) - 1) & 31))
#define svr4_sigword(n) (((n) - 1) >> 5)
#define svr4_sigemptyset(s) memset((s), 0, sizeof(*(s)))
#define svr4_sigismember(s, n) ((s)->bits[svr4_sigword(n)] & svr4_sigmask(n))
#define svr4_sigaddset(s, n) ((s)->bits[svr4_sigword(n)] |= svr4_sigmask(n))
static inline void svr4_32_sigfillset(svr4_32_sigset_t *);
void svr4_32_to_native_sigaction(const struct svr4_32_sigaction *,
struct sigaction *);
void native_to_svr4_32_sigaction(const struct sigaction *,
struct svr4_32_sigaction *);
#ifndef COMPAT_SVR4
const int native_to_svr4_signo[NSIG] = {
0, /* 0 */
SVR4_SIGHUP, /* 1 */
SVR4_SIGINT, /* 2 */
SVR4_SIGQUIT, /* 3 */
SVR4_SIGILL, /* 4 */
SVR4_SIGTRAP, /* 5 */
SVR4_SIGABRT, /* 6 */
SVR4_SIGEMT, /* 7 */
SVR4_SIGFPE, /* 8 */
SVR4_SIGKILL, /* 9 */
SVR4_SIGBUS, /* 10 */
SVR4_SIGSEGV, /* 11 */
SVR4_SIGSYS, /* 12 */
SVR4_SIGPIPE, /* 13 */
SVR4_SIGALRM, /* 14 */
SVR4_SIGTERM, /* 15 */
SVR4_SIGURG, /* 16 */
SVR4_SIGSTOP, /* 17 */
SVR4_SIGTSTP, /* 18 */
SVR4_SIGCONT, /* 19 */
SVR4_SIGCHLD, /* 20 */
SVR4_SIGTTIN, /* 21 */
SVR4_SIGTTOU, /* 22 */
SVR4_SIGIO, /* 23 */
SVR4_SIGXCPU, /* 24 */
SVR4_SIGXFSZ, /* 25 */
SVR4_SIGVTALRM, /* 26 */
SVR4_SIGPROF, /* 27 */
SVR4_SIGWINCH, /* 28 */
0, /* 29 SIGINFO */
SVR4_SIGUSR1, /* 30 */
SVR4_SIGUSR2, /* 31 */
SVR4_SIGPWR, /* 32 */
SVR4_SIGRTMIN + 0, /* 33 */
SVR4_SIGRTMIN + 1, /* 34 */
SVR4_SIGRTMIN + 2, /* 35 */
SVR4_SIGRTMIN + 3, /* 36 */
SVR4_SIGRTMIN + 4, /* 37 */
SVR4_SIGRTMIN + 5, /* 38 */
SVR4_SIGRTMIN + 6, /* 39 */
SVR4_SIGRTMIN + 7, /* 40 */
SVR4_SIGRTMIN + 8, /* 41 */
SVR4_SIGRTMIN + 9, /* 42 */
SVR4_SIGRTMIN + 10, /* 43 */
SVR4_SIGRTMIN + 11, /* 44 */
SVR4_SIGRTMIN + 12, /* 45 */
SVR4_SIGRTMIN + 13, /* 46 */
SVR4_SIGRTMIN + 14, /* 47 */
SVR4_SIGRTMIN + 15, /* 48 */
SVR4_SIGRTMIN + 16, /* 49 */
SVR4_SIGRTMIN + 17, /* 50 */
SVR4_SIGRTMIN + 18, /* 51 */
SVR4_SIGRTMIN + 19, /* 52 */
SVR4_SIGRTMIN + 20, /* 53 */
SVR4_SIGRTMIN + 21, /* 54 */
SVR4_SIGRTMIN + 22, /* 55 */
SVR4_SIGRTMIN + 23, /* 56 */
SVR4_SIGRTMIN + 24, /* 57 */
SVR4_SIGRTMIN + 25, /* 58 */
SVR4_SIGRTMIN + 26, /* 59 */
SVR4_SIGRTMIN + 27, /* 60 */
SVR4_SIGRTMIN + 28, /* 61 */
SVR4_SIGRTMIN + 29, /* 62 */
SVR4_SIGRTMIN + 30, /* 63 */
};
const int svr4_to_native_signo[SVR4_NSIG] = {
0, /* 0 */
SIGHUP, /* 1 */
SIGINT, /* 2 */
SIGQUIT, /* 3 */
SIGILL, /* 4 */
SIGTRAP, /* 5 */
SIGABRT, /* 6 */
SIGEMT, /* 7 */
SIGFPE, /* 8 */
SIGKILL, /* 9 */
SIGBUS, /* 10 */
SIGSEGV, /* 11 */
SIGSYS, /* 12 */
SIGPIPE, /* 13 */
SIGALRM, /* 14 */
SIGTERM, /* 15 */
SIGUSR1, /* 16 */
SIGUSR2, /* 17 */
SIGCHLD, /* 18 */
SIGPWR, /* 19 */
SIGWINCH, /* 20 */
SIGURG, /* 21 */
SIGIO, /* 22 */
SIGSTOP, /* 23 */
SIGTSTP, /* 24 */
SIGCONT, /* 25 */
SIGTTIN, /* 26 */
SIGTTOU, /* 27 */
SIGVTALRM, /* 28 */
SIGPROF, /* 29 */
SIGXCPU, /* 30 */
SIGXFSZ, /* 31 */
SIGRTMIN + 0, /* 32 */
SIGRTMIN + 1, /* 33 */
SIGRTMIN + 2, /* 34 */
SIGRTMIN + 3, /* 35 */
SIGRTMIN + 4, /* 36 */
SIGRTMIN + 5, /* 37 */
SIGRTMIN + 6, /* 38 */
SIGRTMIN + 7, /* 39 */
SIGRTMIN + 8, /* 40 */
SIGRTMIN + 9, /* 41 */
SIGRTMIN + 10, /* 42 */
SIGRTMIN + 11, /* 43 */
SIGRTMIN + 12, /* 44 */
SIGRTMIN + 13, /* 45 */
SIGRTMIN + 14, /* 46 */
SIGRTMIN + 15, /* 47 */
SIGRTMIN + 16, /* 48 */
SIGRTMIN + 17, /* 49 */
SIGRTMIN + 18, /* 50 */
SIGRTMIN + 19, /* 51 */
SIGRTMIN + 20, /* 52 */
SIGRTMIN + 21, /* 53 */
SIGRTMIN + 22, /* 54 */
SIGRTMIN + 23, /* 55 */
SIGRTMIN + 24, /* 56 */
SIGRTMIN + 25, /* 57 */
SIGRTMIN + 26, /* 58 */
SIGRTMIN + 27, /* 59 */
SIGRTMIN + 28, /* 60 */
SIGRTMIN + 29, /* 61 */
SIGRTMIN + 30, /* 62 */
0, /* 63 */
};
#endif
static inline void
svr4_32_sigfillset(svr4_32_sigset_t *s)
{
int i;
svr4_sigemptyset(s);
for (i = 1; i < SVR4_NSIG; i++)
if (svr4_to_native_signo[i] != 0)
svr4_sigaddset(s, i);
}
void
svr4_32_to_native_sigset(const svr4_32_sigset_t *sss, sigset_t *bss)
{
int i, newsig;
sigemptyset(bss);
for (i = 1; i < SVR4_NSIG; i++) {
if (svr4_sigismember(sss, i)) {
newsig = svr4_to_native_signo[i];
if (newsig)
sigaddset(bss, newsig);
}
}
}
void
native_to_svr4_32_sigset(const sigset_t *bss, svr4_32_sigset_t *sss)
{
int i, newsig;
svr4_sigemptyset(sss);
for (i = 1; i < NSIG; i++) {
if (sigismember(bss, i)) {
newsig = native_to_svr4_signo[i];
if (newsig)
svr4_sigaddset(sss, newsig);
}
}
}
/*
* XXX: Only a subset of the flags is currently implemented.
*/
void
svr4_32_to_native_sigaction(const struct svr4_32_sigaction *ssa, struct sigaction *bsa)
{
bsa->sa_handler = NETBSD32PTR64(ssa->svr4_32_sa_handler);
svr4_32_to_native_sigset(&ssa->svr4_32_sa_mask, &bsa->sa_mask);
bsa->sa_flags = 0;
if ((ssa->svr4_32_sa_flags & SVR4_SA_ONSTACK) != 0)
bsa->sa_flags |= SA_ONSTACK;
if ((ssa->svr4_32_sa_flags & SVR4_SA_RESETHAND) != 0)
bsa->sa_flags |= SA_RESETHAND;
if ((ssa->svr4_32_sa_flags & SVR4_SA_RESTART) != 0)
bsa->sa_flags |= SA_RESTART;
if ((ssa->svr4_32_sa_flags & SVR4_SA_SIGINFO) != 0) {
DPRINTF(("svr4_to_native_sigaction: SA_SIGINFO ignored\n"));
}
if ((ssa->svr4_32_sa_flags & SVR4_SA_NODEFER) != 0)
bsa->sa_flags |= SA_NODEFER;
if ((ssa->svr4_32_sa_flags & SVR4_SA_NOCLDWAIT) != 0)
bsa->sa_flags |= SA_NOCLDWAIT;
if ((ssa->svr4_32_sa_flags & SVR4_SA_NOCLDSTOP) != 0)
bsa->sa_flags |= SA_NOCLDSTOP;
if ((ssa->svr4_32_sa_flags & ~SVR4_SA_ALLBITS) != 0) {
DPRINTF(("svr4_32_to_native_sigaction: extra bits %x ignored\n",
ssa->svr4_32_sa_flags & ~SVR4_SA_ALLBITS));
}
}
void
native_to_svr4_32_sigaction(const struct sigaction *bsa, struct svr4_32_sigaction *ssa)
{
NETBSD32PTR32(ssa->svr4_32_sa_handler, bsa->sa_handler);
native_to_svr4_32_sigset(&bsa->sa_mask, &ssa->svr4_32_sa_mask);
ssa->svr4_32_sa_flags = 0;
if ((bsa->sa_flags & SA_ONSTACK) != 0)
ssa->svr4_32_sa_flags |= SVR4_SA_ONSTACK;
if ((bsa->sa_flags & SA_RESETHAND) != 0)
ssa->svr4_32_sa_flags |= SVR4_SA_RESETHAND;
if ((bsa->sa_flags & SA_RESTART) != 0)
ssa->svr4_32_sa_flags |= SVR4_SA_RESTART;
if ((bsa->sa_flags & SA_NODEFER) != 0)
ssa->svr4_32_sa_flags |= SVR4_SA_NODEFER;
if ((bsa->sa_flags & SA_NOCLDSTOP) != 0)
ssa->svr4_32_sa_flags |= SVR4_SA_NOCLDSTOP;
}
int
svr4_32_sys_sigaction(struct lwp *l, const struct svr4_32_sys_sigaction_args *uap, register_t *retval)
{
/* {
syscallarg(int) signum;
syscallarg(const struct svr4_32_sigaction *) nsa;
syscallarg(struct svr4_32_sigaction *) osa;
} */
struct svr4_32_sigaction nssa, ossa;
struct sigaction nbsa, obsa;
int error;
if (SCARG_P32(uap, nsa)) {
error = copyin(SCARG_P32(uap, nsa),
&nssa, sizeof(nssa));
if (error)
return (error);
svr4_32_to_native_sigaction(&nssa, &nbsa);
}
error = sigaction1(l,
svr4_to_native_signo[SVR4_SIGNO(SCARG(uap, signum))],
SCARG_P32(uap, nsa) ? &nbsa : 0, SCARG_P32(uap, osa) ? &obsa : 0,
NULL, 0);
if (error)
return (error);
if (SCARG_P32(uap, osa)) {
native_to_svr4_32_sigaction(&obsa, &ossa);
error = copyout(&ossa, SCARG_P32(uap, osa),
sizeof(ossa));
if (error)
return (error);
}
return (0);
}
int
svr4_32_sys_sigaltstack(struct lwp *l, const struct svr4_32_sys_sigaltstack_args *uap, register_t *retval)
{
/* {
syscallarg(const struct svr4_32_sigaltstack_tp) nss;
syscallarg(struct svr4_32_sigaltstack_tp) oss;
} */
compat_sigaltstack(uap, svr4_32_sigaltstack,
SVR4_SS_ONSTACK, SVR4_SS_DISABLE);
}
/*
* Stolen from the ibcs2 one
*/
int
svr4_32_sys_signal(struct lwp *l, const struct svr4_32_sys_signal_args *uap, register_t *retval)
{
/* {
syscallarg(int) signum;
syscallarg(svr4_32_sig_t) handler;
} */
struct proc *p = l->l_proc;
int signum = svr4_to_native_signo[SVR4_SIGNO(SCARG(uap, signum))];
struct sigaction nbsa, obsa;
sigset_t ss;
int error;
if (signum <= 0 || signum >= SVR4_NSIG)
return (EINVAL);
switch (SVR4_SIGCALL(SCARG(uap, signum))) {
case SVR4_SIGDEFER_MASK:
if (SCARG(uap, handler) == SVR4_SIG_HOLD)
goto sighold;
/* FALLTHROUGH */
case SVR4_SIGNAL_MASK:
nbsa.sa_handler = (sig_t)SCARG(uap, handler);
sigemptyset(&nbsa.sa_mask);
nbsa.sa_flags = 0;
error = sigaction1(l, signum, &nbsa, &obsa, NULL, 0);
if (error)
return (error);
*retval = (u_int)(u_long)obsa.sa_handler;
return (0);
case SVR4_SIGHOLD_MASK:
sighold:
sigemptyset(&ss);
sigaddset(&ss, signum);
mutex_enter(p->p_lock);
error = sigprocmask1(l, SIG_BLOCK, &ss, 0);
mutex_exit(p->p_lock);
return error;
case SVR4_SIGRELSE_MASK:
sigemptyset(&ss);
sigaddset(&ss, signum);
mutex_enter(p->p_lock);
error = sigprocmask1(l, SIG_UNBLOCK, &ss, 0);
mutex_exit(p->p_lock);
return error;
case SVR4_SIGIGNORE_MASK:
nbsa.sa_handler = SIG_IGN;
sigemptyset(&nbsa.sa_mask);
nbsa.sa_flags = 0;
return (sigaction1(l, signum, &nbsa, 0, NULL, 0));
case SVR4_SIGPAUSE_MASK:
mutex_enter(p->p_lock);
ss = l->l_sigmask;
mutex_exit(p->p_lock);
sigdelset(&ss, signum);
return (sigsuspend1(l, &ss));
default:
return (ENOSYS);
}
}
int
svr4_32_sys_sigprocmask(struct lwp *l, const struct svr4_32_sys_sigprocmask_args *uap, register_t *retval)
{
/* {
syscallarg(int) how;
syscallarg(const svr4_32_sigset_t *) set;
syscallarg(svr4_32_sigset_t *) oset;
} */
struct proc *p = l->l_proc;
svr4_32_sigset_t nsss, osss;
sigset_t nbss, obss;
int how;
int error;
/*
* Initialize how to 0 to avoid a compiler warning. Note that
* this is safe because of the check in the default: case.
*/
how = 0;
switch (SCARG(uap, how)) {
case SVR4_SIG_BLOCK:
how = SIG_BLOCK;
break;
case SVR4_SIG_UNBLOCK:
how = SIG_UNBLOCK;
break;
case SVR4_SIG_SETMASK:
how = SIG_SETMASK;
break;
default:
if (SCARG_P32(uap, set))
return EINVAL;
break;
}
if (SCARG_P32(uap, set)) {
error = copyin(SCARG_P32(uap, set),
&nsss, sizeof(nsss));
if (error)
return error;
svr4_32_to_native_sigset(&nsss, &nbss);
}
mutex_enter(p->p_lock);
error = sigprocmask1(l, how,
SCARG_P32(uap, set) ? &nbss : NULL, SCARG_P32(uap, oset) ? &obss : NULL);
mutex_exit(p->p_lock);
if (error)
return error;
if (SCARG_P32(uap, oset)) {
native_to_svr4_32_sigset(&obss, &osss);
error = copyout(&osss, SCARG_P32(uap, oset),
sizeof(osss));
if (error)
return error;
}
return 0;
}
int
svr4_32_sys_sigpending(struct lwp *l, const struct svr4_32_sys_sigpending_args *uap, register_t *retval)
{
/* {
syscallarg(int) what;
syscallarg(svr4_sigset_t *) set;
} */
sigset_t bss;
svr4_32_sigset_t sss;
switch (SCARG(uap, what)) {
case 1: /* sigpending */
sigpending1(l, &bss);
native_to_svr4_32_sigset(&bss, &sss);
break;
case 2: /* sigfillset */
svr4_32_sigfillset(&sss);
break;
default:
return (EINVAL);
}
return (copyout(&sss, SCARG_P32(uap, set), sizeof(sss)));
}
int
svr4_32_sys_sigsuspend(struct lwp *l, const struct svr4_32_sys_sigsuspend_args *uap, register_t *retval)
{
/* {
syscallarg(const svr4_32_sigset_t *) set;
} */
svr4_32_sigset_t sss;
sigset_t bss;
int error;
if (SCARG_P32(uap, set)) {
error = copyin(SCARG_P32(uap, set), &sss, sizeof(sss));
if (error)
return (error);
svr4_32_to_native_sigset(&sss, &bss);
}
return (sigsuspend1(l, SCARG_P32(uap, set) ? &bss : 0));
}
int
svr4_32_sys_pause(struct lwp *l, const void *v, register_t *retval)
{
return (sigsuspend1(l, 0));
}
int
svr4_32_sys_kill(struct lwp *l, const struct svr4_32_sys_kill_args *uap, register_t *retval)
{
/* {
syscallarg(int) pid;
syscallarg(int) signum;
} */
struct sys_kill_args ka;
SCARG(&ka, pid) = SCARG(uap, pid);
SCARG(&ka, signum) = svr4_to_native_signo[SVR4_SIGNO(SCARG(uap, signum))];
return sys_kill(l, &ka, retval);
}
void
svr4_32_getcontext(struct lwp *l, struct svr4_32_ucontext *uc, const sigset_t *mask)
{
void *sp;
struct svr4_32_sigaltstack *ss = &uc->uc_stack;
memset(uc, 0, sizeof(*uc));
/* get machine context */
sp = svr4_32_getmcontext(l, &uc->uc_mcontext, &uc->uc_flags);
/* get link */
NETBSD32PTR32(uc->uc_link, l->l_ctxlink);
/* get stack state. XXX: solaris appears to do this */
#if 0
svr4_32_to_native_sigaltstack(&uc->uc_stack, &p->p_sigacts->ps_sigstk);
#else
NETBSD32PTR32(ss->ss_sp, (void *)(((u_long) sp) & ~(16384 - 1)));
ss->ss_size = 16384;
ss->ss_flags = 0;
#endif
/* get signal mask */
mutex_enter(l->l_proc->p_lock);
native_to_svr4_32_sigset(mask, &uc->uc_sigmask);
mutex_exit(l->l_proc->p_lock);
uc->uc_flags |= SVR4_UC_STACK|SVR4_UC_SIGMASK;
}
int
svr4_32_setcontext(struct lwp *l, struct svr4_32_ucontext *uc)
{
int error;
struct proc *p = l->l_proc;
/* set machine context */
if ((error = svr4_32_setmcontext(l, &uc->uc_mcontext, uc->uc_flags)) != 0)
return error;
/* set link */
l->l_ctxlink = NETBSD32PTR64(uc->uc_link);
mutex_enter(p->p_lock);
/* set signal stack */
if (uc->uc_flags & SVR4_UC_STACK) {
l->l_sigstk.ss_sp = NETBSD32PTR64(uc->uc_stack.ss_sp);
l->l_sigstk.ss_size = uc->uc_stack.ss_size;
l->l_sigstk.ss_flags =
(uc->uc_stack.ss_flags & SVR4_SS_ONSTACK ? SS_ONSTACK : 0) |
(uc->uc_stack.ss_flags & SVR4_SS_DISABLE ? SS_DISABLE : 0);
}
/* set signal mask */
if (uc->uc_flags & SVR4_UC_SIGMASK) {
sigset_t mask;
svr4_32_to_native_sigset(&uc->uc_sigmask, &mask);
(void)sigprocmask1(l, SIG_SETMASK, &mask, 0);
}
mutex_exit(p->p_lock);
return EJUSTRETURN;
}
int
svr4_32_sys_context(struct lwp *l, const struct svr4_32_sys_context_args *uap, register_t *retval)
{
/* {
syscallarg(int) func;
syscallarg(struct svr4_32_ucontext *) uc;
} */
struct svr4_32_ucontext uc;
int error;
*retval = 0;
switch (SCARG(uap, func)) {
case SVR4_GETCONTEXT:
DPRINTF(("getcontext(%p)\n", SCARG(uap, uc)));
svr4_32_getcontext(l, &uc, &l->l_sigmask);
return copyout(&uc, SCARG_P32(uap, uc), sizeof(uc));
case SVR4_SETCONTEXT:
DPRINTF(("setcontext(%p)\n", SCARG(uap, uc)));
if (!SCARG_P32(uap, uc))
exit1(l, W_EXITCODE(0, 0));
else if ((error = copyin(SCARG_P32(uap, uc),
&uc, sizeof(uc))) != 0)
return error;
else
return svr4_32_setcontext(l, &uc);
default:
DPRINTF(("context(%d, %p)\n", SCARG(uap, func),
SCARG(uap, uc)));
return ENOSYS;
}
return 0;
}