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KVM: fix sil/dil/bpl/spl in the mod/rm fields 

The x86-64 extended low-byte registers were fetched correctly from reg,
but not from mod/rm.

This fixes another bug in the boot of RHEL5.9 64-bit, but it is still
not enough.

Cc: <stable@vger.kernel.org> # 3.9
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-05-30 16:35:55 +02:00 committed by Gleb Natapov
parent 103f98ea64
commit 8acb42070e
1 changed files with 4 additions and 1 deletions
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5
arch/x86/kvm/emulate.c
View File

@ -1240,9 +1240,12 @@ static int decode_modrm(struct x86_emulate_ctxt *ctxt,
ctxt->modrm_seg = VCPU_SREG_DS;
if (ctxt->modrm_mod == 3) {
int highbyte_regs = ctxt->rex_prefix == 0;
op->type = OP_REG;
op->bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes;
op->addr.reg = decode_register(ctxt, ctxt->modrm_rm, ctxt->d & ByteOp);
op->addr.reg = decode_register(ctxt, ctxt->modrm_rm,
highbyte_regs && (ctxt->d & ByteOp));
if (ctxt->d & Sse) {
op->type = OP_XMM;
op->bytes = 16;