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// MCore StartUp Code.

        .import main
        .import exit

        .text
        .export _start
_start:
        .export _mainCRTStartup
_mainCRTStartup:
        // Initialise the stack pointer
        lrw     r1, _stack
        mov     r0, r1

        // Zero the .bss data space
        lrw     r1, __bss_start__
        lrw     r2, __bss_end__
        movi    r3, 0
.L0:    
        st      r3, (r1, 0)
        addi    r1, 4
        cmphs   r1, r2
        bf      .L0
#ifdef __ELF__
        // Call the global/static constructors
        jbsr    _init

        // Setup destructors to be called from exit,
        // just in case main never returns...
        lrw     r2, _fini
        jbsr    atexit
#endif
        
        // Initialise the parameters to main()
        movi    r2, 0   // argc 
        movi    r3, 0   // argv
        movi    r4, 0   // envp

        // Call main
        jbsr    main

        // Call exit
        movi    r2, 0
        jbsr    exit

        // We should never reach here.
        bkpt