Displaying 2 results from an estimated 2 matches for "twobyte_special_insn".
2008 Nov 20
10
issues with movnti emulation
We''ve got reports of that change causing HVM data corruption issues. While
I can''t see what''s wrong with the patch, I''d suggest at least reverting it from
the 3.3 tree (which is what our code is based upon) for the time being.
Jan
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
2007 Feb 15
0
[PATCH] x86 emulation: suppress rep prefix handling on non-repeatable instructions
...c
===================================================================
--- 2007-02-07.orig/xen/arch/x86/x86_emulate.c 2007-02-08 08:46:39.000000000 +0100
+++ 2007-02-07/xen/arch/x86/x86_emulate.c 2007-02-08 09:32:00.000000000 +0100
@@ -1579,7 +1579,9 @@ x86_emulate(
if ( twobyte )
goto twobyte_special_insn;
- if ( rep_prefix )
+ if ( rep_prefix &&
+ (((b & ~0xf) == 0xa0 && ((0xfcf0 >> (b & 0xf)) & 1)) ||
+ (b & ~3) == 0x6c) )
{
if ( _regs.ecx == 0 )
{
_______________________________________________
Xen-devel maili...