KVM: x86 emulator: Add support for mov seg, r (0x8e) instruction
Add support for mov r, sreg (0x8c) instruction. [avi: drop the sreg decoding table in favor of 1:1 encoding] Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by: Laurent Vivier <laurent.vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
parent
615ac12561
commit
4257198ae2
@ -138,7 +138,8 @@ static u16 opcode_table[256] = {
|
||||
/* 0x88 - 0x8F */
|
||||
ByteOp | DstMem | SrcReg | ModRM | Mov, DstMem | SrcReg | ModRM | Mov,
|
||||
ByteOp | DstReg | SrcMem | ModRM | Mov, DstReg | SrcMem | ModRM | Mov,
|
||||
0, ModRM | DstReg, 0, Group | Group1A,
|
||||
0, ModRM | DstReg,
|
||||
DstReg | SrcMem | ModRM | Mov, Group | Group1A,
|
||||
/* 0x90 - 0x9F */
|
||||
0, 0, 0, 0, 0, 0, 0, 0,
|
||||
0, 0, 0, 0, ImplicitOps | Stack, ImplicitOps | Stack, 0, 0,
|
||||
@ -1520,6 +1521,28 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
|
||||
case 0x8d: /* lea r16/r32, m */
|
||||
c->dst.val = c->modrm_ea;
|
||||
break;
|
||||
case 0x8e: { /* mov seg, r/m16 */
|
||||
uint16_t sel;
|
||||
int type_bits;
|
||||
int err;
|
||||
|
||||
sel = c->src.val;
|
||||
if (c->modrm_reg <= 5) {
|
||||
type_bits = (c->modrm_reg == 1) ? 9 : 1;
|
||||
err = kvm_load_segment_descriptor(ctxt->vcpu, sel,
|
||||
type_bits, c->modrm_reg);
|
||||
} else {
|
||||
printk(KERN_INFO "Invalid segreg in modrm byte 0x%02x\n",
|
||||
c->modrm);
|
||||
goto cannot_emulate;
|
||||
}
|
||||
|
||||
if (err < 0)
|
||||
goto cannot_emulate;
|
||||
|
||||
c->dst.type = OP_NONE; /* Disable writeback. */
|
||||
break;
|
||||
}
|
||||
case 0x8f: /* pop (sole member of Grp1a) */
|
||||
rc = emulate_grp1a(ctxt, ops);
|
||||
if (rc != 0)
|
||||
|
Loading…
Reference in New Issue
Block a user