Re: [arm-gnu] zeroing out the .bss area

[Mark Deneen <mdeneen+arm@xxxxxxxxxxxxxx>]

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Mark Mitchell wrote:
> JJ wrote:
>
>> Why is it necessary to zero out the .bss?
>
> Because .bss is by definition zero-initialized memory.  Something
> has to zero it.
>
>> I can't use the CS3 framework because I'm not using one of the
>> supported boards.
>
> CS3 is designed to allow you to replace some parts without other
> parts; you don't have to have a supported board.  Refer to the
> Getting Started Guide for more information.
>

I've skipped initializing .bss in boot loaders to save space in
flash.  You can't make any assumptions about initial values being
zero, though.  Once the boot loader jumps to the main program, his
_start takes care of .bss.

Mark
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