On Mon, May 13, 2019 at 4:49 PM Mike Gilbert <floppym@xxxxxxxxxx> wrote:
>
> Just a guess: I wonder if that 'auls' value is left over from the
> previous CPUID result. If that's the case, a simple solution might be
> to zero-out ebx, ecx, and edx in __cpuid().
Mike,
I tried your suggestion and added this patch to gcc 7.3.0:
--- cpuid.h.orig 2019-05-18 13:20:49.000000000 -0400
+++ cpuid.h 2019-05-14 05:52:11.000000000 -0400
@@ -251,8 +251,6 @@
if (__maxlevel == 0 || __maxlevel < __leaf)
return 0;
+ *__ebx = *__ecx = *__edx = 0;
+
__cpuid (__leaf, *__eax, *__ebx, *__ecx, *__edx);
return 1;
}
That didn't work, but perhaps I am putting it in the wrong function?
Any suggestions?
- Matthew
