xnu-1228.12.14.tar.gz

[apple/xnu.git] / bsd / dev / dtrace / systrace.c

diff --git a/bsd/dev/dtrace/systrace.c b/bsd/dev/dtrace/systrace.c
index 35601e943fec93c912b68554450657e5e7abda5f..52362b6401973c4238c438bc8ffac4f6a1900863 100644 (file)
--- a/bsd/dev/dtrace/systrace.c
+++ b/bsd/dev/dtrace/systrace.c
@@ -161,8 +161,12 @@ dtrace_systrace_syscall(struct proc *pp, void *uap, int *rv)
        // Bounds "check" the value of code a la unix_syscall
        sy = (code >= NUM_SYSENT) ? &systrace_sysent[63] : &systrace_sysent[code];
 
-       if ((id = sy->stsy_entry) != DTRACE_IDNONE)
-               (*systrace_probe)(id, *ip, *(ip+1), *(ip+2), *(ip+3), *(ip+4));
+       if ((id = sy->stsy_entry) != DTRACE_IDNONE) {
+               if (ip)
+                       (*systrace_probe)(id, *ip, *(ip+1), *(ip+2), *(ip+3), *(ip+4));
+               else
+                       (*systrace_probe)(id, 0, 0, 0, 0, 0);
+       }
 
 #if 0 /* XXX */
        /*