Re: [Qemu-devel] where is the definition of this fuction?

[Laurent Desnogues <laurent.desnogues@gmail.com>]

2009/11/9 yuanzhu86 <yuanzhu86@163.com>:
> Hi everyone:
> as I want to analysis the source code of qemu now, and there is a litte
> trouble at this fuction:
> in the file--Translate.c(target-i386)
>
> Line 6113 :
> case 0xea: /* ljmp im */
>         {
>             unsigned int selector, offset;
>             if (CODE64(s))
>                 goto illegal_op;
>             ot = dflag ? OT_LONG : OT_WORD;
>             offset = insn_get(s, ot);
>             selector = insn_get(s, OT_WORD);
>             gen_op_movl_T0_im(selector);
>             gen_op_movl_T1_imu(offset);
>         }
>         goto do_ljmp;
> ------------------------------------------------------
> do_ljmp:
>             if (s->pe && !s->vm86) {
>                 if (s->cc_op != CC_OP_DYNAMIC)
>                     gen_op_set_cc_op(s->cc_op);
>                 gen_jmp_im(pc_start - s->cs_base);
>                 tcg_gen_trunc_tl_i32(cpu_tmp2_i32, cpu_T[0]);
>                 gen_helper_ljmp_protected(cpu_tmp2_i32, cpu_T[1],
>                                           tcg_const_i32(s->pc - pc_start));
>             } else {
>                 gen_op_movl_seg_T0_vm(R_CS);
>                 gen_op_movl_T0_T1();
>                 gen_op_jmp_T0();
>             }
>             gen_eob(s);
>             break;
> ------------------------------------------------
> this fucion:
> gen_helper_ljmp_protected(cpu_tmp2_i32, cpu_T[1],
>                                           tcg_const_i32(s->pc - pc_start));
> I guess it should use the fuction glue() to create,but I can not find where
> it is ,could someone tell me that if you konw !
> thanks very much !look forward to your answer !

Helper functions are built using macros.
This will find the definition:

grep -r ljmp_protected .


Laurent