Added _sigvec and _syscall

mach/sun3/libsys/LIST

@@ -142,6 +142,7 @@ _sigsetmask.s
 sigstack.s
 sigtramp.s
 sigvec.c
+_sigvec.c
 socket.s
 socketpair.s
 sstk.s
@@ -151,6 +152,7 @@ swapon.s
 symlink.s
 sync.s
 syscall.s
+_syscall.s
 time.c
 times.c
 _times.c

mach/sun3/libsys/_sigvec.c

@@ -0,0 +1,36 @@
+#include "syscall.h"
+#include <errno.h>
+struct sigvec { int (*handler)(); int mask,flags; };
+int (*(_sigfunc[32]))();
+extern int _sigtramp();
+extern int errno;
+
+_sigvec(sig,vec,ovec)
+	register struct sigvec *vec;
+	struct sigvec *ovec;
+{
+	struct sigvec tmp;
+	int (*old)();
+
+	if ((unsigned) sig >= 32) {
+		errno = EINVAL;
+		return -1;
+	}
+	old = _sigfunc[sig];
+	if (vec) {
+		tmp = *vec;
+		vec = &tmp;
+		if (vec->handler && vec->handler != (int (*)()) 1) {
+			_sigfunc[sig] = vec->handler;
+			vec->handler = _sigtramp;
+		}
+	}
+	if (_syscall(SYS_sigvec,sig,vec,ovec) < 0) {
+		_sigfunc[sig] = old;
+		return -1;
+	}
+	if (ovec && ovec->handler == _sigtramp) {
+		ovec->handler = old;
+	}
+	return 0;
+}

mach/sun3/libsys/_syscall.s

@@ -0,0 +1,14 @@
+.sect .text
+.define __syscall
+__syscall:
+	move.l	(4,sp),d0
+	move.l	(sp),(4,sp)
+	move.l	d0,(sp)
+	trap	#0
+	bcs	1f
+	move.l	(sp),a0
+	jmp	(a0)
+1:
+	move.l	(sp),a0
+	move.l	a0,-(sp)
+	jmp	(cerror)

mach/sun3/libsys/signal.c

@@ -13,13 +13,13 @@ signal(sig,handler))()
 	v.sv_handler = handler;
 	v.sv_mask = masks[sig];
 	v.sv_flags = flags[sig];
-	if (sigvec(sig,&v, &ov) < 0) return (int (*)()) -1;
+	if (_sigvec(sig,&v, &ov) < 0) return (int (*)()) -1;
 	if (v.sv_mask != ov.sv_mask || v.sv_flags != ov.sv_flags) {
 		v.sv_mask = ov.sv_mask;
 		masks[sig] = ov.sv_mask;
 		v.sv_flags = ov.sv_flags;
 		flags[sig] = ov.sv_flags;
-		if (sigvec(sig,&v,(char *) 0) < 0) return (int (*)()) -1;
+		if (_sigvec(sig,&v,(char *) 0) < 0) return (int (*)()) -1;
 	}
 	return ov.sv_handler;
 }