> Consider this code:
> 
> 	ldr	r0, 2f
> 	...
> 
> 2:	.word	0xc0ffee
> 
> Now, as it stands the assembler will resolve the label and convert the LDR 
> into a constant PC-relative instruction without emitting a reloc.  If that 
> code happens to cross a page boundary then the linker has no way to know that 
> it now has to fix up the LDR when it inserts the NOP.

Argh. 

So the linker must be able to know which instructions use 
addresses. Possible, but some work.

As a first fix, one might let the linker put a NOP at the end of every
page. The addresses would then be easier to calculate. 
NewAddress = OldAddress*PageSize/(PageSize - WordSize)

The efficiency lost would be WordSize/Pagesize, on the order
of 1/2000, which still is acceptable.

Kim0