[PATCH 3/3] RFC: ARM: head: Debug prints for section mappings

[Nicolas Pitre]

On Fri, 4 Sep 2020, Nicolas Pitre wrote:

> On Fri, 4 Sep 2020, Linus Walleij wrote:
> 
> > +	.macro	dbg_pr_ram
> > +	mov	r5, r0 /* Save r0 in r5 */
> > +	adr	r0, __debug_tmp
> > +	stmia	r0, {r1-r6}
> > +	mov	r6, r3 /* Save r3 to r6 (print corrupts r3) */
> 
> A long long time ago I had a patch that shuffled registers around so 
> that the long lived values would be kept in r4 and above so to free 
> r0-r3 for short lived values and parameter passing to make things easier 
> when doing this sort of thing. I don't remember if I pushed it to the 
> patch system, and if I did probably it got outdated and I didn't refresh 
> it.

Found it. It is here: 

https://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7234/2


Nicolas