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Re: Gameboy Advance vectors.S (dealing with BIOS)
- From: Bill Diehls <billabloke at yahoo dot com>
- To: Jonathan Larmour <jlarmour at redhat dot com>
- Cc: ecos-discuss at sources dot redhat dot com
- Date: Tue, 22 Jan 2002 12:09:36 -0800 (PST)
- Subject: Re: [ECOS] Gameboy Advance vectors.S (dealing with BIOS)
Hi Jonathan,
Stupid question :) -- even though the ldi and mlt
files are machine generated, I can edit them directly?
thanks,
--bill
--- Jonathan Larmour <jlarmour@redhat.com> wrote:
> Bill Diehls wrote:
> >
> > Hi Jonathan,
> > Thank you for the suggestions! Regarding
> > PLATFORM_VECTORS and (3) (described below), it
> seems
> > that PLATFORM_VECTORS is good for inserting code
> into
> > vectors.S, but as far as inserting a new section
> (with
> > its own absolute address) into arm.ld, another
> > mechanism is required. One possibility is to
> create
> > PLATFORM_SECTION and insert it into arm.ld such
> as:
> >
> > #ifndef PLATFORM_SECTION
> > #define PLATFORM_SECTION
> > #endif
> >
> > #define SECTION_fixed_vectors(_region_, _vma_,
> _lma_)
> > \r
> > .fixed_vectors _vma_ : _lma_ \r
> > { FORCE_OUTPUT; KEEP (*(.fixed_vectors)) } \r
> > > _region_ \r
> > PLATFORM_SECTION
> >
> > That is, if it wants to be included after
> > fixed_vectors. Is there a better way to do this?
>
> Probably, what about:
>
> #ifndef CYG_PLF_DEFINED_SECTION
> #define CYG_PLF_DEFINED_SECTION( _region_, _vma_,
> _lma_ )
> #endif
>
> #define SECTION_platform_defined1( _region_, _vma_,
> _lma_)
> CYG_PLF_DEFINED_SECTION( _region_, _vma_, _lma_ )
>
> You'll have to ensure CYG_PLF_DEFINED_SECTION is
> defined in hal.h but
> that's easy. Then in the memory layout files
> (.ldi/.mlt/.h) for the GBA,
> make sure that new section is added and placed
> appropriately. Then other
> platforms don't need to know about it.
>
> Jifl
> --
> Red Hat, Rustat House, Clifton Road, Cambridge, UK.
> Tel: +44 (1223) 271062
> Maybe this world is another planet's Hell -Aldous
> Huxley || Opinions==mine
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