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Re: ARM7 problem with ldr assembly instruction


On Fri, Jul 12, 2002 at 10:53:18AM -0600, Gary Thomas wrote:

> Again, different cores behave differently.  Some in fact do
> support and exception on un-aligned accesses, but not all.  I
> have a feeling that the simple 7TDMI core you're working with
> does not, but I don't have the data in front of me to say for
> sure.

I'm using the same part (Samsung '4510), and my recollection is
that unaligned accesses do not generate data aborts, they just
don't work.  IIRC, they're not always noops either -- they may
write something to the register or memory, but it may not be
what you wanted.

-- 
Grant Edwards
grante@visi.com

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