latest pr323 patch for ARM

[Gary Benson]

Rob Savoye wrote:
> I've got a greatly improved patch for pr323 to fix the ARM assembler:
> 	http://www.senecass.com/projects/OpenJDK-ARM/thumb2-081310.patch

All the bits that look like this:

  @@ -1814,7 +1814,7 @@
   	mov	r3, #0
   
   	ldr	r2, [tmp_xxx, #THREAD_TOP_ZERO_FRAME]
  -	str	r3, [tmp_xxx, #THREAD_LAST_JAVA_SP]
  +	str	r3, [tmp_xxx, #THREAD_LAST_JAVA_FP]
   	ldr	r0, [istate, #ISTATE_METHOD]
   	ldr	r3, [r2, #0]
   	ldrh	r0, [r0, #40]

are wrong, I think.  To clear the frame pointer, you set
last_Java_*sp* to zero.  So that should have been left as is.
If last_Java_sp is zero then the frame pointer is cleared and
the value of last_Java_fp is never read.

By the way, it's worth trying this with a debug build, so that
assertions are on.

Cheers,
Gary

-- 
http://gbenson.net/