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authorNitin A Kamble <nitin.a.kamble@intel.com>2007-08-17 15:17:41 +0300
committerAvi Kivity <avi@qumranet.com>2007-10-13 10:18:23 +0200
commit19eb938e0115693414a83b6bde2b67896bd9953a (patch)
tree16174b87dc16d32d0efe19162acba0db9ee6e190 /drivers/kvm
parent253abdee5ec2edd0a7f6dc2358bef42e3fdf1f39 (diff)
KVM: x86 emulator: implement 'and $imm, %{al|ax|eax}'
Implement emulation of instruction and al imm8 (opcode 0x24) and ax/eax imm16/imm32 (opcode 0x25) Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm')
-rw-r--r--drivers/kvm/x86_emulate.c21
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index b4f439cfc66..2b94d16e9d2 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -83,7 +83,7 @@ static u8 opcode_table[256] = {
/* 0x20 - 0x27 */
ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM,
ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM,
- 0, 0, 0, 0,
+ SrcImmByte, SrcImm, 0, 0,
/* 0x28 - 0x2F */
ByteOp | DstMem | SrcReg | ModRM, DstMem | SrcReg | ModRM,
ByteOp | DstReg | SrcMem | ModRM, DstReg | SrcMem | ModRM,
@@ -882,10 +882,27 @@ done_prefixes:
sbb: /* sbb */
emulate_2op_SrcV("sbb", src, dst, _eflags);
break;
- case 0x20 ... 0x25:
+ case 0x20 ... 0x23:
and: /* and */
emulate_2op_SrcV("and", src, dst, _eflags);
break;
+ case 0x24: /* and al imm8 */
+ dst.type = OP_REG;
+ dst.ptr = &_regs[VCPU_REGS_RAX];
+ dst.val = *(u8 *)dst.ptr;
+ dst.bytes = 1;
+ dst.orig_val = dst.val;
+ goto and;
+ case 0x25: /* and ax imm16, or eax imm32 */
+ dst.type = OP_REG;
+ dst.bytes = op_bytes;
+ dst.ptr = &_regs[VCPU_REGS_RAX];
+ if (op_bytes == 2)
+ dst.val = *(u16 *)dst.ptr;
+ else
+ dst.val = *(u32 *)dst.ptr;
+ dst.orig_val = dst.val;
+ goto and;
case 0x28 ... 0x2d:
sub: /* sub */
emulate_2op_SrcV("sub", src, dst, _eflags);