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authorGleb Natapov <gleb@redhat.com>2013-04-24 13:38:36 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-05-07 20:33:15 -0700
commit32f7af708e7e73cc0e2a280a06fbb13a0b113692 (patch)
tree48e0c642375638db86c0201faf480c675b891290 /arch
parent69f1a527153ddf2bcaa1aa21ec6ea76ab060c52b (diff)
downloadvexpress-lsk-32f7af708e7e73cc0e2a280a06fbb13a0b113692.tar.gz
KVM: X86 emulator: fix source operand decoding for 8bit mov[zs]x instructions
commit 660696d1d16a71e15549ce1bf74953be1592bcd3 upstream. Source operand for one byte mov[zs]x is decoded incorrectly if it is in high byte register. Fix that. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/emulate.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index a335cc6cde7..a9c9d3e4837 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -4162,6 +4162,10 @@ static int decode_operand(struct x86_emulate_ctxt *ctxt, struct operand *op,
break;
case OpMem8:
ctxt->memop.bytes = 1;
+ if (ctxt->memop.type == OP_REG) {
+ ctxt->memop.addr.reg = decode_register(ctxt, ctxt->modrm_rm, 1);
+ fetch_register_operand(&ctxt->memop);
+ }
goto mem_common;
case OpMem16:
ctxt->memop.bytes = 2;