OpenCores
URL https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [libgloss/] [mcore/] [crt0.S] - Rev 207

Compare with Previous | Blame | View Log

// 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


Compare with Previous | Blame | View Log

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.