Tony Vandiver wrote:
> I'm trying to write a custom bootstrap to load in my application code
> from an SD card.  I want to call file I/O routines located in my
> bootstrap from my application rather than duplicating the file I/O
> library functions in the application because it represents about 10%
> of my code space.

Think hard about whether you really want to do that.  The purpose of a
bootloader is to allow field code upgrades.  Having the app use pieces of
the bootloader defeats that purpose and imposes interface requirements on
the bootloader that may be burdensome in the future.

If it's only 10% of the code, then it seems like a no-brainer to duplicate
the routines in the app and the bootloader.  Then look at which routines you
really use in the bootloader and how you use them.  You can probably pare
down the version in the bootloader to its bare essentials.


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