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KVM: x86 emulator: add LDS/LES/LFS/LGS/LSS instruction emulation

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Add LDS/LES/LFS/LGS/LSS instruction emulation.
(opcode 0xc4, 0xc5, 0x0f 0xb2, 0x0f 0xb4~0xb5)

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Wei Yongjun 2010-08-23 14:56:54 +08:00 committed by Avi Kivity
parent 45221ab668
commit 09b5f4d3c4
1 changed files with 46 additions and 4 deletions
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50
arch/x86/kvm/emulate.c
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@ -1514,6 +1514,23 @@ static int emulate_ret_far(struct x86_emulate_ctxt *ctxt,
return rc;
}
static int emulate_load_segment(struct x86_emulate_ctxt *ctxt,
struct x86_emulate_ops *ops, int seg)
{
struct decode_cache *c = &ctxt->decode;
unsigned short sel;
int rc;
memcpy(&sel, c->src.valptr + c->op_bytes, 2);
rc = load_segment_descriptor(ctxt, ops, sel, seg);
if (rc != X86EMUL_CONTINUE)
return rc;
c->dst.val = c->src.val;
return rc;
}
static inline void
setup_syscalls_segments(struct x86_emulate_ctxt *ctxt,
struct x86_emulate_ops *ops, struct desc_struct *cs,
@ -2458,7 +2475,7 @@ static struct opcode opcode_table[256] = {
D(ByteOp | DstMem | SrcImm | ModRM), D(DstMem | SrcImmByte | ModRM),
I(ImplicitOps | Stack | SrcImmU16, em_ret_near_imm),
D(ImplicitOps | Stack),
N, N,
D(DstReg | SrcMemFAddr | ModRM | No64), D(DstReg | SrcMemFAddr | ModRM | No64),
D(ByteOp | DstMem | SrcImm | ModRM | Mov), D(DstMem | SrcImm | ModRM | Mov),
/* 0xC8 - 0xCF */
N, N, N, D(ImplicitOps | Stack),
@ -2529,9 +2546,9 @@ static struct opcode twobyte_table[256] = {
D(ModRM), I(DstReg | SrcMem | ModRM, em_imul),
/* 0xB0 - 0xB7 */
D(ByteOp | DstMem | SrcReg | ModRM | Lock), D(DstMem | SrcReg | ModRM | Lock),
N, D(DstMem | SrcReg | ModRM | BitOp | Lock),
N, N, D(ByteOp | DstReg | SrcMem | ModRM | Mov),
D(DstReg | SrcMem16 | ModRM | Mov),
D(DstReg | SrcMemFAddr | ModRM), D(DstMem | SrcReg | ModRM | BitOp | Lock),
D(DstReg | SrcMemFAddr | ModRM), D(DstReg | SrcMemFAddr | ModRM),
D(ByteOp | DstReg | SrcMem | ModRM | Mov), D(DstReg | SrcMem16 | ModRM | Mov),
/* 0xB8 - 0xBF */
N, N,
G(BitOp, group8), D(DstMem | SrcReg | ModRM | BitOp | Lock),
@ -3214,6 +3231,16 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
c->dst.addr.reg = &c->eip;
c->dst.bytes = c->op_bytes;
goto pop_instruction;
case 0xc4: /* les */
rc = emulate_load_segment(ctxt, ops, VCPU_SREG_ES);
if (rc != X86EMUL_CONTINUE)
goto done;
break;
case 0xc5: /* lds */
rc = emulate_load_segment(ctxt, ops, VCPU_SREG_DS);
if (rc != X86EMUL_CONTINUE)
goto done;
break;
case 0xc6 ... 0xc7: /* mov (sole member of Grp11) */
mov:
c->dst.val = c->src.val;
@ -3659,10 +3686,25 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
c->dst.addr.reg = (unsigned long *)&c->regs[VCPU_REGS_RAX];
}
break;
case 0xb2: /* lss */
rc = emulate_load_segment(ctxt, ops, VCPU_SREG_SS);
if (rc != X86EMUL_CONTINUE)
goto done;
break;
case 0xb3:
btr: /* btr */
emulate_2op_SrcV_nobyte("btr", c->src, c->dst, ctxt->eflags);
break;
case 0xb4: /* lfs */
rc = emulate_load_segment(ctxt, ops, VCPU_SREG_FS);
if (rc != X86EMUL_CONTINUE)
goto done;
break;
case 0xb5: /* lgs */
rc = emulate_load_segment(ctxt, ops, VCPU_SREG_GS);
if (rc != X86EMUL_CONTINUE)
goto done;
break;
case 0xb6 ... 0xb7: /* movzx */
c->dst.bytes = c->op_bytes;
c->dst.val = (c->d & ByteOp) ? (u8) c->src.val