Bug fixed: incorrect return value

New version adapted from m68k4 version.

mach/m68k2/libsys/signal.s

@@ -1,9 +1,10 @@
+
 .define _signal
 .extern _signal
 NSIG=32
 _signal:
 	move.w	4(sp), d0
-	ext.l	d0
+	ext.l   d0
 	cmp.l	#NSIG,d0
 	bcc	1f
 	move.l	6(sp),d1
@@ -16,7 +17,9 @@ _signal:
 	beq	2f
 	btst	#0,d1
 	bne	2f
-	move.l	#enter,d1
+	move.l	#jmptab,d1
+	add.l	d0,d1
+	add.l	d0,d1
 2:
 	move.l	d0,a0
 	move.w	#0x30,d0
@@ -26,16 +29,52 @@ _signal:
 	bne	4f
 	move.l	a1,d0
 4:
+	clr.l	d1
 	rts
 1:
 	move.l	#22,d0
 3:
 	jmp	cerror
 
+jmptab:	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
+	bsr	enter
 enter:
 	movem.l	d0/d1/a0/a1,-(sp)
-	move.l	16(sp),a0
-	move.l	a0,-(sp)
+	move.l	16(sp),d0
+	sub.l	#jmptab+2,d0
+	asr.l	#1,d0
+	move.l	d0,-(sp)
+	move.l	d0,a0
 	add.l	a0,a0
 	add.l	a0,a0
 	add.l	#dvect,a0