Subversion Repositories openrisc_me

##==============================================================================

##

##      crt0.S

##

##      MN10200 startup code

##

##==============================================================================

##

## Copyright (c) 1995, 1996, 1997, 1998 Cygnus Solutions

##

## 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.

##

##------------------------------------------------------------------------------

        .file   "crt0.S"

##------------------------------------------------------------------------------

## Startup code

        .section .text

        .global _start

_start:

        mov _stack,a3           # Load up the stack pointer and allocate

                                # our current frame.

        mov _edata,a0           # Get the start/end of bss

        mov _end,a1

        cmp a0,a1               # If no bss, then do nothing

        beqx .L0

        sub d0,d0               # clear d0

.L1:

        movb d0,(a0)            # Clear a byte and bump pointer

        add 1,a0

        cmp a0,a1

        bnex .L1

.L0:

        jsr ___main

        sub d0,d0

        mov d0,d1

        mov d0,(a3)

        jsr _main               # Call main program

        jmp _exit               # All done, no need to return or

                                # deallocate our stack.

        .section .stack

_stack: .long   1