KVM: x86: emulate SAHF instruction
Yet another instruction that we fail to emulate, this time found in Windows 2008R2 32-bit. Reviewed-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
parent
a94b40a630
commit
98f73630f9
|
@ -3296,6 +3296,18 @@ static int em_cpuid(struct x86_emulate_ctxt *ctxt)
|
||||||
return X86EMUL_CONTINUE;
|
return X86EMUL_CONTINUE;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static int em_sahf(struct x86_emulate_ctxt *ctxt)
|
||||||
|
{
|
||||||
|
u32 flags;
|
||||||
|
|
||||||
|
flags = EFLG_CF | EFLG_PF | EFLG_AF | EFLG_ZF | EFLG_SF;
|
||||||
|
flags &= *reg_rmw(ctxt, VCPU_REGS_RAX) >> 8;
|
||||||
|
|
||||||
|
ctxt->eflags &= ~0xffUL;
|
||||||
|
ctxt->eflags |= flags | X86_EFLAGS_FIXED;
|
||||||
|
return X86EMUL_CONTINUE;
|
||||||
|
}
|
||||||
|
|
||||||
static int em_lahf(struct x86_emulate_ctxt *ctxt)
|
static int em_lahf(struct x86_emulate_ctxt *ctxt)
|
||||||
{
|
{
|
||||||
*reg_rmw(ctxt, VCPU_REGS_RAX) &= ~0xff00UL;
|
*reg_rmw(ctxt, VCPU_REGS_RAX) &= ~0xff00UL;
|
||||||
|
@ -3790,7 +3802,8 @@ static const struct opcode opcode_table[256] = {
|
||||||
D(DstAcc | SrcNone), I(ImplicitOps | SrcAcc, em_cwd),
|
D(DstAcc | SrcNone), I(ImplicitOps | SrcAcc, em_cwd),
|
||||||
I(SrcImmFAddr | No64, em_call_far), N,
|
I(SrcImmFAddr | No64, em_call_far), N,
|
||||||
II(ImplicitOps | Stack, em_pushf, pushf),
|
II(ImplicitOps | Stack, em_pushf, pushf),
|
||||||
II(ImplicitOps | Stack, em_popf, popf), N, I(ImplicitOps, em_lahf),
|
II(ImplicitOps | Stack, em_popf, popf),
|
||||||
|
I(ImplicitOps, em_sahf), I(ImplicitOps, em_lahf),
|
||||||
/* 0xA0 - 0xA7 */
|
/* 0xA0 - 0xA7 */
|
||||||
I2bv(DstAcc | SrcMem | Mov | MemAbs, em_mov),
|
I2bv(DstAcc | SrcMem | Mov | MemAbs, em_mov),
|
||||||
I2bv(DstMem | SrcAcc | Mov | MemAbs | PageTable, em_mov),
|
I2bv(DstMem | SrcAcc | Mov | MemAbs | PageTable, em_mov),
|
||||||
|
|
Loading…
Reference in a new issue