Skip to content

Commit

Permalink
KVM: x86 emulator: emulate LAHF
Browse files Browse the repository at this point in the history 
Opcode 9F.

Signed-off-by: Avi Kivity <avi@redhat.com>
  • Loading branch information
Avi Kivity committed Jul 9, 2012
1 parent 7c068e4 commit 2dd7caa
Showing 1 changed file with 8 additions and 1 deletion.
9 changes: 8 additions & 1 deletion arch/x86/kvm/emulate.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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) {
Expand Down Expand Up @@ -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),
Expand Down

0 comments on commit 2dd7caa

Please sign in to comment.