[parisc-linux] parisc64 kernel and ret1 (gr29) setup

[Matthew Wilcox]

On Thu, Dec 21, 2000 at 04:00:06PM +0000, Richard Hirst wrote:
> At the moment we set up sp with "ldo TASK_SZ_ALGN+64(%r1),%r30" on syscall
> entry.  For 64 bit presumably we should do something like:
> 
> 	ldo     TASK_SZ_ALGN+80(%r1),%r30
> 	ldo	-16(%r30),%r29
> 
> Which gives 64 bytes for parameter saves, plus 16 bytes for rp+sp, and
> initialises ret1.
> 
> Does that sound right?

does the 64-bit ABI relax the requirement for the stack to be 64-byte aligned?
if not, it should be ldo TASK_SZ_ALIGN+128(%r1), %r30

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