cvs-cpuid-level2

2016-10-12  H.J. Lu  <hongjiu.lu@intel.com>

	[BZ #20647]
	* sysdeps/x86/cacheinfo.c (handle_intel): Return -1 if the
	maximum CPUID level is less than 2.

Gbp-Pq: Topic i386
Gbp-Pq: Name cvs-cpuid-level2.diff

diff --git a/sysdeps/x86/cacheinfo.c b/sysdeps/x86/cacheinfo.c
index cf4f64b0d8e2a4ab7cc7a3d7c96e28b42c0dcb61..35268e8d9af98f30397e6e3bc37386f1c79e5635 100644 (file)
--- a/sysdeps/x86/cacheinfo.c
+++ b/sysdeps/x86/cacheinfo.c
@@ -259,7 +259,9 @@ intel_check_word (int name, unsigned int value, bool *has_level_2,
 static long int __attribute__ ((noinline))
 handle_intel (int name, unsigned int maxidx)
 {
-  assert (maxidx >= 2);
+  /* Return -1 for older CPUs.  */
+  if (maxidx < 2)
+    return -1;
 
   /* OK, we can use the CPUID instruction to get all info about the
      caches.  */