linux-kernel - [PATCH 22/46] KVM: x86 emulator: Add decoding of 16bit second immediate argument

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Message-Id: <1242818323-10413-23-git-send-email-avi@redhat.com>
Date:	Wed, 20 May 2009 14:18:19 +0300
From:	Avi Kivity <avi@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	kvm@...r.kernel.org
Subject: [PATCH 22/46] KVM: x86 emulator: Add decoding of 16bit second immediate argument

From: Gleb Natapov <gleb@...hat.com>

Such as segment number in lcall/ljmp

Signed-off-by: Gleb Natapov <gleb@...hat.com>
Signed-off-by: Avi Kivity <avi@...hat.com>
---
 arch/x86/kvm/x86_emulate.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c
index d7c9f6f..c015063 100644
--- a/arch/x86/kvm/x86_emulate.c
+++ b/arch/x86/kvm/x86_emulate.c
@@ -76,6 +76,7 @@
 #define Src2CL      (1<<29)
 #define Src2ImmByte (2<<29)
 #define Src2One     (3<<29)
+#define Src2Imm16   (4<<29)
 #define Src2Mask    (7<<29)
 
 enum {
@@ -1072,6 +1073,12 @@ done_prefixes:
 		c->src2.bytes = 1;
 		c->src2.val = insn_fetch(u8, 1, c->eip);
 		break;
+	case Src2Imm16:
+		c->src2.type = OP_IMM;
+		c->src2.ptr = (unsigned long *)c->eip;
+		c->src2.bytes = 2;
+		c->src2.val = insn_fetch(u16, 2, c->eip);
+		break;
 	case Src2One:
 		c->src2.bytes = 1;
 		c->src2.val = 1;
-- 
1.6.0.6

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