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

[JJ <alchemistmba@xxxxxxxxx>]

So as long as I don't expect unintialized global and statically
allocated variables to be 0, I'm fine?

JJ

On Tue, Nov 3, 2009 at 1:03 PM, Mark Deneen <mdeneen+arm@xxxxxxxxxxxxxx> wrote:
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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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