Subversion Repositories or1k

/* Startup code for SH5 & ELF.
   Copyright (C) 1999 Free Software Foundation, Inc.
   Copyright (C) 2001 Hewlett-Packard Australia

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/* This is the canonical entry point, usually the first thing in the text
   segment.

        At this entry point, most registers' values are unspecified, except:

   sp           The stack contains the arguments and environment:
                0(sp)                   argc
                4(sp)                   argv[0]
                ...
                (4*argc)(sp)            NULL
                (4*(argc+1))(sp)        envp[0]
                ...
                                        NULL
*/

        .file   "crt0.S"

        .globl _start
        .globl __main

        .type   __uClibc_start_main,@function

        .section .text64,"xa"
        .align 2        /* 2^2 = 4 */
        
_start:
        /* Clear the frame pointer since this is the outermost frame.  */
###     mov #0, r14     # qqq

        /* Pop argc off the stack and save a pointer to argv */
        ld.l    r15, 0, r2      /* argc */
        addi    r15, 4, r3      /* argv */

        /* set up the value for the environment pointer r4 = (argc+1)*4+argv */
        addi    r2, 1, r4       /* envp = argc + 1 */
        shlli   r4, 2, r4       /* envp = envp * 4 */
        add     r3, r4, r4      /* envp = envp + argv */

        /* call main() */
        movi    __uClibc_start_main,r17
        ptabs/l r17,tr0
        blink   tr0,r18

        /* should never get here....*/
###     movi    abort@lh,r17
###     shori   abort@ll,r17
        ptabs/l r17,tr0
        blink   tr0,r63 /* call abort() => (r63) do not come back ... */

        /*
         *      The following is a stub to stop the GNU toolchain
         *      from calling its C-RTL initialization routines.
         */
__main:
        ptabs/l r18,tr0
        blink   tr0,r63