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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [libgloss/] [lm32/] [crt0.S] - Blame information for rev 313

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Line No. Rev Author Line
1 148 jeremybenn
/*
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 * Lattice Mico32 C startup code.
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 * Contributed by Jon Beniston 
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 * notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 * notice, this list of conditions and the following disclaimer in the
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 * documentation and/or other materials provided with the distribution.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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        .section    .boot, "ax", @progbits
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        /* Program starts here */
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        .global     _start
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_start:
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        /* Setup stack and global pointer */
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        mvhi    sp, hi(_fstack)
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        ori     sp, sp, lo(_fstack)
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        mvhi    gp, hi(_gp)
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        ori     gp, gp, lo(_gp)
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        /* Clear BSS */
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        mvhi    r1, hi(_fbss)
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        ori     r1, r1, lo(_fbss)
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        mvi     r2, 0
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        mvhi    r3, hi(_ebss)
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        ori     r3, r3, lo(_ebss)
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        sub     r3, r3, r1
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        calli   memset
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        /* Call C++ constructors */
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        calli   _init
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        /* Call C++ destructors on exit */
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        mvhi    r1, hi(_fini)
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        ori     r1, r1, lo(_fini)
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        calli   atexit
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        /* Call main program */
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        mvi     r1, 0
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        mvi     r2, 0
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        mvi     r3, 0
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        calli   main
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        /* Call exit, which doesn't return, to perform any clean up */
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        calli   exit

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