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authorAvi Kivity <avi@qumranet.com>2008-01-18 12:58:04 +0200
committerAvi Kivity <avi@qumranet.com>2008-04-27 11:53:14 +0300
commit7d858a19efe5844a98e060931570359b70dea6d1 (patch)
tree62ee800fb0f1a8a976ab47b015717b34636f3275 /arch
parent43bb19cd3398d3f544d8e2d6ed6c5c5d7b4e5819 (diff)
KVM: x86 emulator: Group decoding for group 3
This adds group decoding support for opcodes 0xf6, 0xf7 (group 3). Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/x86_emulate.c34
1 files changed, 10 insertions, 24 deletions
diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c
index cf1ce7c316a..52e65ae37f0 100644
--- a/arch/x86/kvm/x86_emulate.c
+++ b/arch/x86/kvm/x86_emulate.c
@@ -70,7 +70,7 @@
#define GroupMask 0xff /* Group number stored in bits 0:7 */
enum {
- Group1A,
+ Group1A, Group3_Byte, Group3,
};
static u16 opcode_table[256] = {
@@ -171,8 +171,7 @@ static u16 opcode_table[256] = {
0, 0, 0, 0,
/* 0xF0 - 0xF7 */
0, 0, 0, 0,
- ImplicitOps, ImplicitOps,
- ByteOp | DstMem | SrcNone | ModRM, DstMem | SrcNone | ModRM,
+ ImplicitOps, ImplicitOps, Group | Group3_Byte, Group | Group3,
/* 0xF8 - 0xFF */
ImplicitOps, 0, ImplicitOps, ImplicitOps,
0, 0, ByteOp | DstMem | SrcNone | ModRM, DstMem | SrcNone | ModRM
@@ -239,6 +238,14 @@ static u16 twobyte_table[256] = {
static u16 group_table[] = {
[Group1A*8] =
DstMem | SrcNone | ModRM | Mov | Stack, 0, 0, 0, 0, 0, 0, 0,
+ [Group3_Byte*8] =
+ ByteOp | SrcImm | DstMem | ModRM, 0,
+ ByteOp | DstMem | SrcNone | ModRM, ByteOp | DstMem | SrcNone | ModRM,
+ 0, 0, 0, 0,
+ [Group3*8] =
+ DstMem | SrcImm | ModRM | SrcImm, 0,
+ DstMem | SrcNone | ModRM, ByteOp | DstMem | SrcNone | ModRM,
+ 0, 0, 0, 0,
};
static u16 group2_table[] = {
@@ -1070,26 +1077,6 @@ static inline int emulate_grp3(struct x86_emulate_ctxt *ctxt,
switch (c->modrm_reg) {
case 0 ... 1: /* test */
- /*
- * Special case in Grp3: test has an immediate
- * source operand.
- */
- c->src.type = OP_IMM;
- c->src.ptr = (unsigned long *)c->eip;
- c->src.bytes = (c->d & ByteOp) ? 1 : c->op_bytes;
- if (c->src.bytes == 8)
- c->src.bytes = 4;
- switch (c->src.bytes) {
- case 1:
- c->src.val = insn_fetch(s8, 1, c->eip);
- break;
- case 2:
- c->src.val = insn_fetch(s16, 2, c->eip);
- break;
- case 4:
- c->src.val = insn_fetch(s32, 4, c->eip);
- break;
- }
emulate_2op_SrcV("test", c->src, c->dst, ctxt->eflags);
break;
case 2: /* not */
@@ -1103,7 +1090,6 @@ static inline int emulate_grp3(struct x86_emulate_ctxt *ctxt,
rc = X86EMUL_UNHANDLEABLE;
break;
}
-done:
return rc;
}