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Re: [Qemu-devel] where is the definition of this fuction?
From: |
Laurent Desnogues |
Subject: |
Re: [Qemu-devel] where is the definition of this fuction? |
Date: |
Mon, 9 Nov 2009 10:02:17 +0100 |
2009/11/9 yuanzhu86 <address@hidden>:
> 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