[PATCH] x86 emulator: Add 'push es' instruction (opcode 0x06)

[Mohammed Gamal <m.gamal005@gmail.com>]

[Removed an unused variable]

Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
---
 arch/x86/kvm/emulate.c |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 2eb807a..065131e 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -92,7 +92,7 @@ static u32 opcode_table[256] = {
 	/* 0x00 - 0x07 */
 	ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM,
 	ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM,
-	ByteOp | DstAcc | SrcImm, DstAcc | SrcImm, 0, 0,
+	ByteOp | DstAcc | SrcImm, DstAcc | SrcImm, ImplicitOps | Stack, 0,
 	/* 0x08 - 0x0F */
 	ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM,
 	ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM,
@@ -1186,6 +1186,13 @@ static int emulate_pop(struct x86_emulate_ctxt *ctxt,
 	return rc;
 }
 
+static void emulate_push_sreg(struct x86_emulate_ctxt *ctxt, int seg)
+{
+	struct decode_cache *c = &ctxt->decode;
+	c->src.ptr = (unsigned long *) &c->regs[seg];
+	emulate_push(ctxt);
+}
+
 static inline int emulate_grp1a(struct x86_emulate_ctxt *ctxt,
 				struct x86_emulate_ops *ops)
 {
@@ -1707,6 +1714,9 @@ special_insn:
 	      add:		/* add */
 		emulate_2op_SrcV("add", c->src, c->dst, ctxt->eflags);
 		break;
+	case 0x06:		/* push es */
+		emulate_push_sreg(ctxt, VCPU_SREG_ES);
+		break;
 	case 0x08 ... 0x0d:
 	      or:		/* or */
 		emulate_2op_SrcV("or", c->src, c->dst, ctxt->eflags);
-- 
1.6.0.4