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KVM: x86 emulator: fix mov r/m, sreg emulation.

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mov r/m, sreg generates #UD ins sreg is incorrect.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Gleb Natapov
2010-03-18 15:20:07 +02:00
committed by Avi Kivity
parent 063db061b9
commit 5e3ae6c540
1 changed files with 3 additions and 4 deletions
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7
arch/x86/kvm/emulate.c
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@@ -2126,12 +2126,11 @@ special_insn:
case 0x8c: { /* mov r/m, sreg */ case 0x8c: { /* mov r/m, sreg */
struct kvm_segment segreg; struct kvm_segment segreg;
if (c->modrm_reg <= 5) if (c->modrm_reg <= VCPU_SREG_GS)
kvm_get_segment(ctxt->vcpu, &segreg, c->modrm_reg); kvm_get_segment(ctxt->vcpu, &segreg, c->modrm_reg);
else { else {
printk(KERN_INFO "0x8c: Invalid segreg in modrm byte 0x%02x\n", kvm_queue_exception(ctxt->vcpu, UD_VECTOR);
c->modrm); goto done;
goto cannot_emulate;
} }
c->dst.val = segreg.selector; c->dst.val = segreg.selector;
break; break;