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KVM: x86 emulator: emulate LAHF

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Opcode 9F.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2012-06-11 13:09:07 +03:00
parent 7c068e4558
commit 2dd7caa092
1 changed files with 8 additions and 1 deletions
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9
arch/x86/kvm/emulate.c
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@ -3227,6 +3227,13 @@ static int em_cpuid(struct x86_emulate_ctxt *ctxt)
return X86EMUL_CONTINUE;
}
static int em_lahf(struct x86_emulate_ctxt *ctxt)
{
ctxt->regs[VCPU_REGS_RAX] &= ~0xff00UL;
ctxt->regs[VCPU_REGS_RAX] |= (ctxt->eflags & 0xff) << 8;
return X86EMUL_CONTINUE;
}
static bool valid_cr(int nr)
{
switch (nr) {
@ -3622,7 +3629,7 @@ static struct opcode opcode_table[256] = {
D(DstAcc | SrcNone), I(ImplicitOps | SrcAcc, em_cwd),
I(SrcImmFAddr | No64, em_call_far), N,
II(ImplicitOps | Stack, em_pushf, pushf),
II(ImplicitOps | Stack, em_popf, popf), N, N,
II(ImplicitOps | Stack, em_popf, popf), N, I(ImplicitOps, em_lahf),
/* 0xA0 - 0xA7 */
I2bv(DstAcc | SrcMem | Mov | MemAbs, em_mov),
I2bv(DstMem | SrcAcc | Mov | MemAbs | PageTable, em_mov),