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KVM: x86 emulator: fix RCX access during rep emulation 

During rep emulation access length to RCX depends on current address
mode.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Gleb Natapov 2010-03-15 16:38:29 +02:00 committed by Avi Kivity
parent d6d367d678
commit c73e197bc5
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kvm/emulate.c
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@ -1852,7 +1852,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
if (c->rep_prefix && (c->d & String)) {
/* All REP prefixes have the same first termination condition */
if (c->regs[VCPU_REGS_RCX] == 0) {
if (address_mask(c, c->regs[VCPU_REGS_RCX]) == 0) {
kvm_rip_write(ctxt->vcpu, c->eip);
goto done;
}
@ -1876,7 +1876,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
goto done;
}
}
c->regs[VCPU_REGS_RCX]--;
register_address_increment(c, &c->regs[VCPU_REGS_RCX], -1);
c->eip = kvm_rip_read(ctxt->vcpu);
}