X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/2d21ac55c334faf3a56e5634905ed6987fc787d4..7ddcb079202367355dddccdfa4318e57d50318be:/osfmk/i386/mcount.s

diff --git a/osfmk/i386/mcount.s b/osfmk/i386/mcount.s
index 822d643e0..0246ba152 100644
--- a/osfmk/i386/mcount.s
+++ b/osfmk/i386/mcount.s
@@ -41,6 +41,10 @@ Entry(mcount)
 	// Check that this cpu is ready.
 	// This delays the start of mcounting until a cpu is really prepared.
 	//
+        mov		%gs, %ax
+		test	%ax, %ax
+	jz	1f
+
         movl	%gs:CPU_RUNNING,%eax
         testl	%eax,%eax
 	jz	1f