x86 emulator: fix parity calculation for AAD instruction
Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 2b11318..a335cc6 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2995,14 +2995,11 @@
ctxt->dst.val = (ctxt->dst.val & 0xffff0000) | al;
- ctxt->eflags &= ~(X86_EFLAGS_PF | X86_EFLAGS_SF | X86_EFLAGS_ZF);
-
- if (!al)
- ctxt->eflags |= X86_EFLAGS_ZF;
- if (!(al & 1))
- ctxt->eflags |= X86_EFLAGS_PF;
- if (al & 0x80)
- ctxt->eflags |= X86_EFLAGS_SF;
+ /* Set PF, ZF, SF */
+ ctxt->src.type = OP_IMM;
+ ctxt->src.val = 0;
+ ctxt->src.bytes = 1;
+ fastop(ctxt, em_or);
return X86EMUL_CONTINUE;
}