1901c3e1f2
A long long time ago the register keyword told the compiler to store the corresponding variable in a CPU register, but it is not relevant for any compiler used in the FreeBSD world today. ANSIfy related prototypes while here. Reviewed by: cem, jhb Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D10193
428 lines
10 KiB
C
428 lines
10 KiB
C
/*-
|
|
* Copyright (c) 1995 Scott Bartram
|
|
* Copyright (c) 1995 Steven Wallace
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/syscallsubr.h>
|
|
#include <sys/sysproto.h>
|
|
|
|
#include <i386/ibcs2/ibcs2_types.h>
|
|
#include <i386/ibcs2/ibcs2_signal.h>
|
|
#include <i386/ibcs2/ibcs2_proto.h>
|
|
#include <i386/ibcs2/ibcs2_xenix.h>
|
|
#include <i386/ibcs2/ibcs2_util.h>
|
|
|
|
#define sigemptyset(s) SIGEMPTYSET(*(s))
|
|
#define sigismember(s, n) SIGISMEMBER(*(s), n)
|
|
#define sigaddset(s, n) SIGADDSET(*(s), n)
|
|
|
|
#define ibcs2_sigmask(n) (1 << ((n) - 1))
|
|
#define ibcs2_sigemptyset(s) bzero((s), sizeof(*(s)))
|
|
#define ibcs2_sigismember(s, n) (*(s) & ibcs2_sigmask(n))
|
|
#define ibcs2_sigaddset(s, n) (*(s) |= ibcs2_sigmask(n))
|
|
|
|
static void ibcs2_to_bsd_sigset(const ibcs2_sigset_t *, sigset_t *);
|
|
static void bsd_to_ibcs2_sigset(const sigset_t *, ibcs2_sigset_t *);
|
|
static void ibcs2_to_bsd_sigaction(struct ibcs2_sigaction *,
|
|
struct sigaction *);
|
|
static void bsd_to_ibcs2_sigaction(struct sigaction *,
|
|
struct ibcs2_sigaction *);
|
|
|
|
int bsd_to_ibcs2_sig[IBCS2_SIGTBLSZ] = {
|
|
IBCS2_SIGHUP, /* 1 */
|
|
IBCS2_SIGINT, /* 2 */
|
|
IBCS2_SIGQUIT, /* 3 */
|
|
IBCS2_SIGILL, /* 4 */
|
|
IBCS2_SIGTRAP, /* 5 */
|
|
IBCS2_SIGABRT, /* 6 */
|
|
IBCS2_SIGEMT, /* 7 */
|
|
IBCS2_SIGFPE, /* 8 */
|
|
IBCS2_SIGKILL, /* 9 */
|
|
IBCS2_SIGBUS, /* 10 */
|
|
IBCS2_SIGSEGV, /* 11 */
|
|
IBCS2_SIGSYS, /* 12 */
|
|
IBCS2_SIGPIPE, /* 13 */
|
|
IBCS2_SIGALRM, /* 14 */
|
|
IBCS2_SIGTERM, /* 15 */
|
|
0, /* 16 - SIGURG */
|
|
IBCS2_SIGSTOP, /* 17 */
|
|
IBCS2_SIGTSTP, /* 18 */
|
|
IBCS2_SIGCONT, /* 19 */
|
|
IBCS2_SIGCLD, /* 20 */
|
|
IBCS2_SIGTTIN, /* 21 */
|
|
IBCS2_SIGTTOU, /* 22 */
|
|
IBCS2_SIGPOLL, /* 23 */
|
|
0, /* 24 - SIGXCPU */
|
|
0, /* 25 - SIGXFSZ */
|
|
IBCS2_SIGVTALRM, /* 26 */
|
|
IBCS2_SIGPROF, /* 27 */
|
|
IBCS2_SIGWINCH, /* 28 */
|
|
0, /* 29 */
|
|
IBCS2_SIGUSR1, /* 30 */
|
|
IBCS2_SIGUSR2, /* 31 */
|
|
0 /* 32 */
|
|
};
|
|
|
|
static int ibcs2_to_bsd_sig[IBCS2_SIGTBLSZ] = {
|
|
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 */
|
|
0, /* 19 - SIGPWR */
|
|
SIGWINCH, /* 20 */
|
|
0, /* 21 */
|
|
SIGIO, /* 22 */
|
|
SIGSTOP, /* 23 */
|
|
SIGTSTP, /* 24 */
|
|
SIGCONT, /* 25 */
|
|
SIGTTIN, /* 26 */
|
|
SIGTTOU, /* 27 */
|
|
SIGVTALRM, /* 28 */
|
|
SIGPROF, /* 29 */
|
|
0, /* 30 */
|
|
0, /* 31 */
|
|
0 /* 32 */
|
|
};
|
|
|
|
void
|
|
ibcs2_to_bsd_sigset(iss, bss)
|
|
const ibcs2_sigset_t *iss;
|
|
sigset_t *bss;
|
|
{
|
|
int i, newsig;
|
|
|
|
sigemptyset(bss);
|
|
for (i = 1; i <= IBCS2_SIGTBLSZ; i++) {
|
|
if (ibcs2_sigismember(iss, i)) {
|
|
newsig = ibcs2_to_bsd_sig[_SIG_IDX(i)];
|
|
if (newsig)
|
|
sigaddset(bss, newsig);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
bsd_to_ibcs2_sigset(bss, iss)
|
|
const sigset_t *bss;
|
|
ibcs2_sigset_t *iss;
|
|
{
|
|
int i, newsig;
|
|
|
|
ibcs2_sigemptyset(iss);
|
|
for (i = 1; i <= IBCS2_SIGTBLSZ; i++) {
|
|
if (sigismember(bss, i)) {
|
|
newsig = bsd_to_ibcs2_sig[_SIG_IDX(i)];
|
|
if (newsig)
|
|
ibcs2_sigaddset(iss, newsig);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
ibcs2_to_bsd_sigaction(isa, bsa)
|
|
struct ibcs2_sigaction *isa;
|
|
struct sigaction *bsa;
|
|
{
|
|
|
|
bsa->sa_handler = isa->isa_handler;
|
|
ibcs2_to_bsd_sigset(&isa->isa_mask, &bsa->sa_mask);
|
|
bsa->sa_flags = 0; /* ??? SA_NODEFER */
|
|
if ((isa->isa_flags & IBCS2_SA_NOCLDSTOP) != 0)
|
|
bsa->sa_flags |= SA_NOCLDSTOP;
|
|
}
|
|
|
|
static void
|
|
bsd_to_ibcs2_sigaction(bsa, isa)
|
|
struct sigaction *bsa;
|
|
struct ibcs2_sigaction *isa;
|
|
{
|
|
|
|
isa->isa_handler = bsa->sa_handler;
|
|
bsd_to_ibcs2_sigset(&bsa->sa_mask, &isa->isa_mask);
|
|
isa->isa_flags = 0;
|
|
if ((bsa->sa_flags & SA_NOCLDSTOP) != 0)
|
|
isa->isa_flags |= IBCS2_SA_NOCLDSTOP;
|
|
}
|
|
|
|
int
|
|
ibcs2_sigaction(struct thread *td, struct ibcs2_sigaction_args *uap)
|
|
{
|
|
struct ibcs2_sigaction isa;
|
|
struct sigaction nbsa, obsa;
|
|
struct sigaction *nbsap;
|
|
int error;
|
|
|
|
if (uap->act != NULL) {
|
|
if ((error = copyin(uap->act, &isa, sizeof(isa))) != 0)
|
|
return (error);
|
|
ibcs2_to_bsd_sigaction(&isa, &nbsa);
|
|
nbsap = &nbsa;
|
|
} else
|
|
nbsap = NULL;
|
|
if (uap->sig <= 0 || uap->sig > IBCS2_NSIG)
|
|
return (EINVAL);
|
|
error = kern_sigaction(td, ibcs2_to_bsd_sig[_SIG_IDX(uap->sig)], &nbsa,
|
|
&obsa, 0);
|
|
if (error == 0 && uap->oact != NULL) {
|
|
bsd_to_ibcs2_sigaction(&obsa, &isa);
|
|
error = copyout(&isa, uap->oact, sizeof(isa));
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
ibcs2_sigsys(struct thread *td, struct ibcs2_sigsys_args *uap)
|
|
{
|
|
struct proc *p = td->td_proc;
|
|
struct sigaction sa;
|
|
int signum = IBCS2_SIGNO(uap->sig);
|
|
int error;
|
|
|
|
if (signum <= 0 || signum > IBCS2_NSIG) {
|
|
if (IBCS2_SIGCALL(uap->sig) == IBCS2_SIGNAL_MASK ||
|
|
IBCS2_SIGCALL(uap->sig) == IBCS2_SIGSET_MASK)
|
|
td->td_retval[0] = (int)IBCS2_SIG_ERR;
|
|
return EINVAL;
|
|
}
|
|
signum = ibcs2_to_bsd_sig[_SIG_IDX(signum)];
|
|
|
|
switch (IBCS2_SIGCALL(uap->sig)) {
|
|
case IBCS2_SIGSET_MASK:
|
|
/*
|
|
* Check for SIG_HOLD action.
|
|
* Otherwise, perform signal() except with different sa_flags.
|
|
*/
|
|
if (uap->fp != IBCS2_SIG_HOLD) {
|
|
/* add sig to mask before exececuting signal handler */
|
|
sa.sa_flags = 0;
|
|
goto ibcs2_sigset;
|
|
}
|
|
/* else FALLTHROUGH to sighold */
|
|
|
|
case IBCS2_SIGHOLD_MASK:
|
|
{
|
|
sigset_t mask;
|
|
|
|
SIGEMPTYSET(mask);
|
|
SIGADDSET(mask, signum);
|
|
return (kern_sigprocmask(td, SIG_BLOCK, &mask, NULL,
|
|
0));
|
|
}
|
|
|
|
case IBCS2_SIGNAL_MASK:
|
|
{
|
|
struct sigaction osa;
|
|
|
|
/* do not automatically block signal */
|
|
sa.sa_flags = SA_NODEFER;
|
|
#ifdef SA_RESETHAND
|
|
if((signum != IBCS2_SIGILL) &&
|
|
(signum != IBCS2_SIGTRAP) &&
|
|
(signum != IBCS2_SIGPWR))
|
|
/* set to SIG_DFL before executing handler */
|
|
sa.sa_flags |= SA_RESETHAND;
|
|
#endif
|
|
ibcs2_sigset:
|
|
sa.sa_handler = uap->fp;
|
|
sigemptyset(&sa.sa_mask);
|
|
#if 0
|
|
if (signum != SIGALRM)
|
|
sa.sa_flags |= SA_RESTART;
|
|
#endif
|
|
error = kern_sigaction(td, signum, &sa, &osa, 0);
|
|
if (error != 0) {
|
|
DPRINTF(("signal: sigaction failed: %d\n",
|
|
error));
|
|
td->td_retval[0] = (int)IBCS2_SIG_ERR;
|
|
return (error);
|
|
}
|
|
td->td_retval[0] = (int)osa.sa_handler;
|
|
|
|
/* special sigset() check */
|
|
if(IBCS2_SIGCALL(uap->sig) == IBCS2_SIGSET_MASK) {
|
|
PROC_LOCK(p);
|
|
/* check to make sure signal is not blocked */
|
|
if(sigismember(&td->td_sigmask, signum)) {
|
|
/* return SIG_HOLD and unblock signal*/
|
|
td->td_retval[0] = (int)IBCS2_SIG_HOLD;
|
|
SIGDELSET(td->td_sigmask, signum);
|
|
signotify(td);
|
|
}
|
|
PROC_UNLOCK(p);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
case IBCS2_SIGRELSE_MASK:
|
|
{
|
|
sigset_t mask;
|
|
|
|
SIGEMPTYSET(mask);
|
|
SIGADDSET(mask, signum);
|
|
return (kern_sigprocmask(td, SIG_UNBLOCK, &mask, NULL,
|
|
0));
|
|
}
|
|
|
|
case IBCS2_SIGIGNORE_MASK:
|
|
{
|
|
sa.sa_handler = SIG_IGN;
|
|
sigemptyset(&sa.sa_mask);
|
|
sa.sa_flags = 0;
|
|
error = kern_sigaction(td, signum, &sa, NULL, 0);
|
|
if (error != 0)
|
|
DPRINTF(("sigignore: sigaction failed\n"));
|
|
return (error);
|
|
}
|
|
|
|
case IBCS2_SIGPAUSE_MASK:
|
|
{
|
|
sigset_t mask;
|
|
|
|
PROC_LOCK(p);
|
|
mask = td->td_sigmask;
|
|
PROC_UNLOCK(p);
|
|
SIGDELSET(mask, signum);
|
|
return kern_sigsuspend(td, mask);
|
|
}
|
|
|
|
default:
|
|
return ENOSYS;
|
|
}
|
|
}
|
|
|
|
int
|
|
ibcs2_sigprocmask(struct thread *td, struct ibcs2_sigprocmask_args *uap)
|
|
{
|
|
ibcs2_sigset_t iss;
|
|
sigset_t oss, nss;
|
|
sigset_t *nssp;
|
|
int error, how;
|
|
|
|
switch (uap->how) {
|
|
case IBCS2_SIG_BLOCK:
|
|
how = SIG_BLOCK;
|
|
break;
|
|
case IBCS2_SIG_UNBLOCK:
|
|
how = SIG_UNBLOCK;
|
|
break;
|
|
case IBCS2_SIG_SETMASK:
|
|
how = SIG_SETMASK;
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
if (uap->set != NULL) {
|
|
if ((error = copyin(uap->set, &iss, sizeof(iss))) != 0)
|
|
return error;
|
|
ibcs2_to_bsd_sigset(&iss, &nss);
|
|
nssp = &nss;
|
|
} else
|
|
nssp = NULL;
|
|
error = kern_sigprocmask(td, how, nssp, &oss, 0);
|
|
if (error == 0 && uap->oset != NULL) {
|
|
bsd_to_ibcs2_sigset(&oss, &iss);
|
|
error = copyout(&iss, uap->oset, sizeof(iss));
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
ibcs2_sigpending(struct thread *td, struct ibcs2_sigpending_args *uap)
|
|
{
|
|
struct proc *p = td->td_proc;
|
|
sigset_t bss;
|
|
ibcs2_sigset_t iss;
|
|
|
|
PROC_LOCK(p);
|
|
bss = td->td_siglist;
|
|
SIGSETOR(bss, p->p_siglist);
|
|
SIGSETAND(bss, td->td_sigmask);
|
|
PROC_UNLOCK(p);
|
|
bsd_to_ibcs2_sigset(&bss, &iss);
|
|
|
|
return copyout(&iss, uap->mask, sizeof(iss));
|
|
}
|
|
|
|
int
|
|
ibcs2_sigsuspend(struct thread *td, struct ibcs2_sigsuspend_args *uap)
|
|
{
|
|
ibcs2_sigset_t sss;
|
|
sigset_t bss;
|
|
int error;
|
|
|
|
if ((error = copyin(uap->mask, &sss, sizeof(sss))) != 0)
|
|
return error;
|
|
|
|
ibcs2_to_bsd_sigset(&sss, &bss);
|
|
return kern_sigsuspend(td, bss);
|
|
}
|
|
|
|
int
|
|
ibcs2_pause(struct thread *td, struct ibcs2_pause_args *uap)
|
|
{
|
|
sigset_t mask;
|
|
|
|
PROC_LOCK(td->td_proc);
|
|
mask = td->td_sigmask;
|
|
PROC_UNLOCK(td->td_proc);
|
|
return kern_sigsuspend(td, mask);
|
|
}
|
|
|
|
int
|
|
ibcs2_kill(struct thread *td, struct ibcs2_kill_args *uap)
|
|
{
|
|
struct kill_args ka;
|
|
|
|
if (uap->signo <= 0 || uap->signo > IBCS2_NSIG)
|
|
return (EINVAL);
|
|
ka.pid = uap->pid;
|
|
ka.signum = ibcs2_to_bsd_sig[_SIG_IDX(uap->signo)];
|
|
return sys_kill(td, &ka);
|
|
}
|