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KVM: x86 emulator: Implement jmp far opcode ff/5 

Implement jmp far opcode ff/5. It is used by multiboot loader.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Gleb Natapov 2010-02-25 16:36:43 +02:00 committed by Avi Kivity
parent e35b7b9c9e
commit ea79849d4c
1 changed files with 9 additions and 2 deletions
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11
arch/x86/kvm/emulate.c
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@ -346,7 +346,8 @@ static u32 group_table[] = {
[Group5*8] =
DstMem | SrcNone | ModRM, DstMem | SrcNone | ModRM,
SrcMem | ModRM | Stack, 0,
SrcMem | ModRM | Stack, 0, SrcMem | ModRM | Stack, 0,
SrcMem | ModRM | Stack, SrcMem | ModRM | Src2Mem16 | ImplicitOps,
SrcMem | ModRM | Stack, 0,
[Group7*8] =
0, 0, ModRM | SrcMem | Priv, ModRM | SrcMem | Priv,
SrcNone | ModRM | DstMem | Mov, 0,
@ -2322,6 +2323,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
case 0xe9: /* jmp rel */
goto jmp;
case 0xea: /* jmp far */
jump_far:
if (kvm_load_segment_descriptor(ctxt->vcpu, c->src2.val,
VCPU_SREG_CS))
goto done;
@ -2397,11 +2399,16 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
ctxt->eflags |= EFLG_DF;
c->dst.type = OP_NONE; /* Disable writeback. */
break;
case 0xfe ... 0xff: /* Grp4/Grp5 */
case 0xfe: /* Grp4 */
grp45:
rc = emulate_grp45(ctxt, ops);
if (rc != X86EMUL_CONTINUE)
goto done;
break;
case 0xff: /* Grp5 */
if (c->modrm_reg == 5)
goto jump_far;
goto grp45;
}
writeback: