Re: [wip/cagney_regbuf-20020515-branch] Introduce regcache_move()

[Andrew Cagney <ac131313@cygnus.com>]

> rearnsha@arm.com said:
> 
>> Write_register_bytes will then overwrite the raw value in the cache
>> without any regard to the masking operations that should be occuring
>> when  updating R15; the CPSR bits in the PC are just clobbered and we
>> are left  with a broken value in the R15 register. 
> 
> 
> Actually, this isn't a strict description of what happens (though the 
> result is pretty much the same).  What really happens is that 
> write_register_byte will then call write_register_gen for each register 
> that returns a REGISTER_BYTE() address in the same range.  The result is 
> that write_register_bytes calls
> 
> 	write_register_gen(PC, newval)
> 	write_register_gen(CPSR, newval)
> 
> which is still equally bogus.

Yep, and the second write won't do anything.  Code will detect that the 
location is already up-to-date and supress the write through.

Feel free to express total disbelief! :-)

REGISTER_BYTE is also on the hit-list.

Andrew