Index: i386/i386/trap.c
===================================================================
RCS file: /home/cvs/cvs/src/sys/i386/i386/trap.c,v
retrieving revision 1.133.2.1
diff -u -u -r1.133.2.1 trap.c
--- trap.c	1999/08/29 16:05:56	1.133.2.1
+++ trap.c	1999/09/10 14:42:21
@@ -1041,6 +1084,7 @@
 	int error;
 	int args[8];
 	u_int code;
+	int tracedsyscall = ((frame.tf_eflags & PSL_T) && !(frame.tf_eflags & PSL_VM));
 
 #ifdef DIAGNOSTIC
 	if (ISPL(frame.tf_cs) != SEL_UPL)
@@ -1135,10 +1179,12 @@
 		break;
 	}
 
-	if ((frame.tf_eflags & PSL_T) && !(frame.tf_eflags & PSL_VM)) {
+	if (tracedsyscall) {
 		/* Traced syscall. */
 		frame.tf_eflags &= ~PSL_T;
-		trapsignal(p, SIGTRAP, 0);
+		/* tell the signal handler this is a trace trap */
+		frame.tf_trapno = T_TRCTRAP;
+		trapsignal(p, SIGTRAP, T_TRCTRAP);
 	}
 
 	userret(p, &frame, sticks);