Could you try the attached patch?
Samuel
Index: include/private/cpuid.h
===================================================================
--- include/private/cpuid.h (révision 4210)
+++ include/private/cpuid.h (copie de travail)
@@ -1,5 +1,5 @@
/*
- * Copyright © 2010-2011 Université Bordeaux 1
+ * Copyright © 2010-2012 Université Bordeaux 1
* Copyright © 2010 Cisco Systems, Inc. All rights reserved.
*
* See COPYING in top-level directory.
@@ -52,21 +52,20 @@
static __hwloc_inline void hwloc_cpuid(unsigned *eax, unsigned *ebx, unsigned
*ecx, unsigned *edx)
{
asm(
-#ifdef HWLOC_X86_32_ARCH
+#ifdef HWLOC_X86_32_ARCH
"push %%ebx\n\t"
+#else
+ "push %%rbx\n\t"
#endif
"cpuid\n\t"
-#ifdef HWLOC_X86_32_ARCH
+#ifdef HWLOC_X86_32_ARCH
"mov %%ebx,%1\n\t"
"pop %%ebx\n\t"
-#endif
- : "+a" (*eax),
-#ifdef HWLOC_X86_32_ARCH
- "=r" (*ebx),
#else
- "=b" (*ebx),
+ "mov %%ebx,%1\n\t"
+ "pop %%rbx\n\t"
#endif
- "+c" (*ecx), "=d" (*edx));
+ : "+a" (*eax), "=r" (*ebx), "+c" (*ecx), "=d" (*edx));
}
#endif /* HWLOC_PRIVATE_CPUID_H */
