diff options
| author | Gleb Natapov <gleb@redhat.com> | 2013-04-24 13:38:36 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-07 19:51:57 -0700 |
| commit | 5b5b30580218eae22609989546bac6e44d0eda6e (patch) | |
| tree | 5763a61f5cbcacb3922eb1588d4458a8f7013b0e /arch | |
| parent | bb878b3019cb0b1d574bd88e30ce00ea6d6814f9 (diff) | |
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.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 83756223f8a..8c45818c732 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -3737,6 +3737,10 @@ 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; |