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KVM: x86 emulator: inject #UD on access to non-existing CR

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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 15:20:10 +02:00
committed by Avi Kivity
parent ab8557b2b3
commit 6aebfa6ea7
1 changed files with 7 additions and 0 deletions
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7
arch/x86/kvm/emulate.c
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@@ -2520,6 +2520,13 @@ twobyte_insn:
c->dst.type = OP_NONE; c->dst.type = OP_NONE;
break; break;
case 0x20: /* mov cr, reg */ case 0x20: /* mov cr, reg */
switch (c->modrm_reg) {
case 1:
case 5 ... 7:
case 9 ... 15:
kvm_queue_exception(ctxt->vcpu, UD_VECTOR);
goto done;
}
c->regs[c->modrm_rm] = ops->get_cr(c->modrm_reg, ctxt->vcpu); c->regs[c->modrm_rm] = ops->get_cr(c->modrm_reg, ctxt->vcpu);
c->dst.type = OP_NONE; /* no writeback */ c->dst.type = OP_NONE; /* no writeback */
break; break;