Add JrCXZ instruction emulation (opcode 0xe3)
Used by FreeBSD boot loader.
Signed-off-by: Wei Yongjun <yjwei@xxxxxxxxxxxxxx>
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index cbf6209..6ccc584 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2331,7 +2331,7 @@ static struct opcode opcode_table[256] = {
/* 0xD8 - 0xDF */
N, N, N, N, N, N, N, N,
/* 0xE0 - 0xE7 */
- X3(D(SrcImmByte)), N,
+ X4(D(SrcImmByte)),
D(ByteOp | SrcImmUByte | DstAcc), D(SrcImmUByte | DstAcc),
D(ByteOp | SrcAcc | DstImmUByte), D(SrcAcc | DstImmUByte),
/* 0xE8 - 0xEF */
@@ -3092,6 +3092,10 @@ special_insn:
(c->b == 0xe2 || test_cc(c->b ^ 0x5, ctxt->eflags)))
jmp_rel(c, c->src.val);
break;
+ case 0xe3: /* jcxz/jecxz/jrcxz */
+ if (address_mask(c, c->regs[VCPU_REGS_RCX]) == 0)
+ jmp_rel(c, c->src.val);
+ break;
case 0xe4: /* inb */
case 0xe5: /* in */
goto do_io_in;
--
1.7.0.4
--
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