Re: gcc section maping ROM/RAM for embedded target

[Jon Grant <jg at jguk dot org>]

Ian Lance Taylor wrote, On 03/10/11 23:57:
> Jon Grant<jg@jguk.org>  writes:
>
> > a) I would like to know if is possible to set a section prefix (or
> > suffix) on all symbols.  I was hoping to find something like:
> > --section-prefix=module_name ?  Then when compiling those object files
> > and creating library my makefile would have passed that argument to
> > gcc.
>
> gcc does not support any such option.
>
> Note that your linker script can assign input sections to output
> sections using the name of the file in which the input section is
> defined.  So you may be able to sort things out that way.

Perfect, thank you for this tip.

> > b) is it possible overlay RAM section mapping? e.g. I have a two
> > buffers for two different filesystems that are slightly different
> > sizes. Only one filesystem will ever be active at the same time, so I
> > would like to overlay these in the memory map, so that only the larger
> > of the two areas is visible. Saving the smaller area from the memory
> > map!
>
> Look for OVERLAY in the linker documentation.

Great, thank you.

Regards, Jon