From: Nitin A Kamble <[email protected]>
Instructions:
inc r16/r32 (opcode 0x40-0x47)
dec r16/r32 (opcode 0x48-0x4f)
Signed-off-by: Nitin A Kamble <[email protected]>
Signed-off-by: Avi Kivity <[email protected]>
---
drivers/kvm/x86_emulate.c | 20 ++++++++++++++++++--
1 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index b03029e..72621c9 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -96,8 +96,12 @@ static u8 opcode_table[256] = {
ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM,
ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM,
0, 0, 0, 0,
- /* 0x40 - 0x4F */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ /* 0x40 - 0x47 */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ /* 0x48 - 0x4F */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
/* 0x50 - 0x57 */
ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
@@ -1376,6 +1380,18 @@ special_insn:
if (c->twobyte)
goto twobyte_special_insn;
switch (c->b) {
+ case 0x40 ... 0x47: /* inc r16/r32 */
+ c->dst.bytes = c->op_bytes;
+ c->dst.ptr = (unsigned long *)&c->regs[c->b & 0x7];
+ c->dst.val = *c->dst.ptr;
+ emulate_1op("inc", c->dst, ctxt->eflags);
+ break;
+ case 0x48 ... 0x4f: /* dec r16/r32 */
+ c->dst.bytes = c->op_bytes;
+ c->dst.ptr = (unsigned long *)&c->regs[c->b & 0x7];
+ c->dst.val = *c->dst.ptr;
+ emulate_1op("dec", c->dst, ctxt->eflags);
+ break;
case 0x50 ... 0x57: /* push reg */
if (c->op_bytes == 2)
c->src.val = (u16) c->regs[c->b & 0x7];
--
1.5.3.7
--
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