2 * 43BSD_SIGNAL.C - 4.3BSD compatibility signal syscalls
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
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36 * $DragonFly: src/sys/emulation/43bsd/43bsd_signal.c,v 1.5 2007/03/12 21:07:42 corecode Exp $
37 * from: DragonFly kern/kern_sig.c,v 1.22
39 * These syscalls used to live in kern/kern_sig.c. They are modified
40 * to use the new split syscalls.
43 #include "opt_compat.h"
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/sysproto.h>
49 #include <sys/kernel.h>
50 #include <sys/kern_syscall.h>
52 #include <sys/signal.h>
53 #include <sys/signalvar.h>
55 #include <sys/thread2.h>
57 #define ONSIG 32 /* NSIG for osig* syscalls. XXX. */
59 #define SIG2OSIG(sig, osig) osig = (sig).__bits[0]
60 #define OSIG2SIG(osig, sig) SIGEMPTYSET(sig); (sig).__bits[0] = osig
62 #define SIGSETLO(set1, set2) ((set1).__bits[0] = (set2).__bits[0])
65 * These syscalls are unncessary because it is next to impossible to
66 * find 4.3BSD binaries built for i386. The current libc has routines
67 * which fake the 4.3BSD family of signal syscalls, so anything built
68 * from source won't be using these.
70 * This file is provided for educational purposes only. The osigvec()
71 * syscall is probably broken because the current signal code uses
72 * a different signal trampoline.
77 sys_osigvec(struct osigvec_args *uap)
80 struct sigaction nsa, osa;
81 struct sigaction *nsap, *osap;
84 if (uap->signum <= 0 || uap->signum >= ONSIG)
86 nsap = (uap->nsv != NULL) ? &nsa : NULL;
87 osap = (uap->osv != NULL) ? &osa : NULL;
89 error = copyin(uap->nsv, &vec, sizeof(vec));
92 nsap->sa_handler = vec.sv_handler;
93 OSIG2SIG(vec.sv_mask, nsap->sa_mask);
94 nsap->sa_flags = vec.sv_flags;
95 nsap->sa_flags ^= SA_RESTART; /* opposite of SV_INTERRUPT */
98 error = kern_sigaction(uap->signum, nsap, osap);
100 if (osap && !error) {
101 vec.sv_handler = osap->sa_handler;
102 SIG2OSIG(osap->sa_mask, vec.sv_mask);
103 vec.sv_flags = osap->sa_flags;
104 vec.sv_flags &= ~SA_NOCLDWAIT;
105 vec.sv_flags ^= SA_RESTART;
106 error = copyout(&vec, uap->osv, sizeof(vec));
115 sys_osigblock(struct osigblock_args *uap)
117 struct lwp *lp = curthread->td_lwp;
120 OSIG2SIG(uap->mask, set);
123 SIG2OSIG(lp->lwp_sigmask, uap->sysmsg_iresult);
124 SIGSETOR(lp->lwp_sigmask, set);
133 sys_osigsetmask(struct osigsetmask_args *uap)
135 struct lwp *lp = curthread->td_lwp;
138 OSIG2SIG(uap->mask, set);
141 SIG2OSIG(lp->lwp_sigmask, uap->sysmsg_iresult);
142 SIGSETLO(lp->lwp_sigmask, set);
151 sys_osigstack(struct osigstack_args *uap)
153 struct lwp *lp = curthread->td_lwp;
157 ss.ss_sp = lp->lwp_sigstk.ss_sp;
158 ss.ss_onstack = lp->lwp_sigstk.ss_flags & SS_ONSTACK;
159 if (uap->oss && (error = copyout(&ss, uap->oss,
160 sizeof(struct sigstack)))) {
163 if (uap->nss && (error = copyin(uap->nss, &ss, sizeof(ss))) == 0) {
164 lp->lwp_sigstk.ss_sp = ss.ss_sp;
165 lp->lwp_sigstk.ss_size = 0;
166 lp->lwp_sigstk.ss_flags |= ss.ss_onstack & SS_ONSTACK;
167 lp->lwp_flags |= LWP_ALTSTACK;
173 sys_okillpg(struct okillpg_args *uap)
177 error = kern_kill(uap->signum, -uap->pgid, -1);