2 * 43BSD_SIGNAL.C - 4.3BSD compatibility signal syscalls
4 * Copyright (c) 1989, 1993
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40 * $DragonFly: src/sys/emulation/43bsd/43bsd_signal.c,v 1.5 2007/03/12 21:07:42 corecode Exp $
41 * from: DragonFly kern/kern_sig.c,v 1.22
43 * These syscalls used to live in kern/kern_sig.c. They are modified
44 * to use the new split syscalls.
47 #include "opt_compat.h"
49 #include <sys/param.h>
50 #include <sys/systm.h>
51 #include <sys/sysproto.h>
53 #include <sys/kernel.h>
54 #include <sys/kern_syscall.h>
56 #include <sys/signal.h>
57 #include <sys/signalvar.h>
59 #include <sys/thread2.h>
60 #include <sys/mplock2.h>
62 #define ONSIG 32 /* NSIG for osig* syscalls. XXX. */
64 #define SIG2OSIG(sig, osig) osig = (sig).__bits[0]
65 #define OSIG2SIG(osig, sig) SIGEMPTYSET(sig); (sig).__bits[0] = osig
67 #define SIGSETLO(set1, set2) ((set1).__bits[0] = (set2).__bits[0])
70 * These syscalls are unncessary because it is next to impossible to
71 * find 4.3BSD binaries built for i386. The current libc has routines
72 * which fake the 4.3BSD family of signal syscalls, so anything built
73 * from source won't be using these.
75 * This file is provided for educational purposes only. The osigvec()
76 * syscall is probably broken because the current signal code uses
77 * a different signal trampoline.
82 sys_osigvec(struct osigvec_args *uap)
85 struct sigaction nsa, osa;
86 struct sigaction *nsap, *osap;
89 if (uap->signum <= 0 || uap->signum >= ONSIG)
91 nsap = (uap->nsv != NULL) ? &nsa : NULL;
92 osap = (uap->osv != NULL) ? &osa : NULL;
94 error = copyin(uap->nsv, &vec, sizeof(vec));
97 nsap->sa_handler = vec.sv_handler;
98 OSIG2SIG(vec.sv_mask, nsap->sa_mask);
99 nsap->sa_flags = vec.sv_flags;
100 nsap->sa_flags ^= SA_RESTART; /* opposite of SV_INTERRUPT */
104 error = kern_sigaction(uap->signum, nsap, osap);
107 if (osap && !error) {
108 vec.sv_handler = osap->sa_handler;
109 SIG2OSIG(osap->sa_mask, vec.sv_mask);
110 vec.sv_flags = osap->sa_flags;
111 vec.sv_flags &= ~SA_NOCLDWAIT;
112 vec.sv_flags ^= SA_RESTART;
113 error = copyout(&vec, uap->osv, sizeof(vec));
122 sys_osigblock(struct osigblock_args *uap)
124 struct lwp *lp = curthread->td_lwp;
127 OSIG2SIG(uap->mask, set);
130 SIG2OSIG(lp->lwp_sigmask, uap->sysmsg_iresult);
131 SIGSETOR(lp->lwp_sigmask, set);
140 sys_osigsetmask(struct osigsetmask_args *uap)
142 struct lwp *lp = curthread->td_lwp;
145 OSIG2SIG(uap->mask, set);
148 SIG2OSIG(lp->lwp_sigmask, uap->sysmsg_iresult);
149 SIGSETLO(lp->lwp_sigmask, set);
158 sys_osigstack(struct osigstack_args *uap)
160 struct lwp *lp = curthread->td_lwp;
164 ss.ss_sp = lp->lwp_sigstk.ss_sp;
165 ss.ss_onstack = lp->lwp_sigstk.ss_flags & SS_ONSTACK;
166 if (uap->oss && (error = copyout(&ss, uap->oss,
167 sizeof(struct sigstack)))) {
170 if (uap->nss && (error = copyin(uap->nss, &ss, sizeof(ss))) == 0) {
171 lp->lwp_sigstk.ss_sp = ss.ss_sp;
172 lp->lwp_sigstk.ss_size = 0;
173 lp->lwp_sigstk.ss_flags |= ss.ss_onstack & SS_ONSTACK;
174 lp->lwp_flag |= LWP_ALTSTACK;
183 sys_okillpg(struct okillpg_args *uap)
188 error = kern_kill(uap->signum, -uap->pgid, -1);