[U-Boot-Users] Generic ARM Error with respect to usage of r8 in start.S's.
wd at denx.de
Tue Jun 24 20:40:49 CEST 2003
In message <FD2AC9A020DDD51194710008C7089B20053D4CA9 at dlee17.itg.ti.com> you wrote:
> possibly reset....instead it just locked up. Tracing the code I see that
> the exception code in start.S for all ARM ports uses r8 as a frame pointer.
> This is NOT allowed as r8 is reserved as the global data pointer....given
> the way the ARM code currently operates I don't see why this has to be, but
What is it you don't see? Why we reserve R8 for global data?
> it might be handy if someone was trying to use C before the memory
> controller was up (this is not the case for the ARM code today).
...but may change any day. As soon as there is a little time left for
"nice to have" things.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
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unfixable obsolescence. - Fred Brooks, "The Mythical Man Month"
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