Subversion Repositories openrisc_2011-10-31

/*

 * crt0.S for the Blackfin processor

 *

 * Copyright (C) 2006 Analog Devices, Inc.

 *

 * The authors hereby grant permission to use, copy, modify, distribute,

 * and license this software and its documentation for any purpose, provided

 * that existing copyright notices are retained in all copies and that this

 * notice is included verbatim in any distributions. No written agreement,

 * license, or royalty fee is required for any of the authorized uses.

 * Modifications to this software may be copyrighted by their authors

 * and need not follow the licensing terms described here, provided that

 * the new terms are clearly indicated on the first page of each file where

 * they apply.

 */

        .text

        .align  2

        .global __start

__start:

        /* Start by setting up a stack */

        link 0xc;

        /* Zero the memory in the .bss section.  */

        p0.l = __edata;

        p0.h = __edata;

        p1.l = __end;

        p1.h = __end;

        p1 -= p0;

        r0 = 0;

        lsetup (L$L$clear_bss, L$L$clear_bss) lc0 = p1;

L$L$clear_bss:

        B [p0++] = r0;

#ifdef __BFIN_FDPIC__

        /* Set up GOT pointer.  */

        P0.L = __ROFIXUP_END__;

        P0.H = __ROFIXUP_END__;

        P4 = [P0 - 4];

#endif

        /* Need to set up standard file handles */

        /*  Parse string at r1 */

        p0.l = __init;

        p0.h = __init;

        P3 = P4;

        call    (p0)

        p0.l = _atexit;

        p0.h = _atexit;

#ifdef __BFIN_FDPIC__

        r0 = [P4 + __fini@FUNCDESC_GOT17M4]  ;

        P3 = P4;

#else

        r0.l = __fini;

        r0.h = __fini;

#endif

        call    (p0)

        p0.l = ___setup_argv_and_call_main;

        p0.h = ___setup_argv_and_call_main;

        P3 = P4;

        call    (p0)

        p0.l = _exit;

        p0.h = _exit;

        P3 = P4;

        jump    (p0)            /* Should not return.  */

        nop;