[PATCH] ARM: force linker to use PIC veneers

[Russell King - ARM Linux]

On Thu, Mar 26, 2015 at 01:20:16PM +0100, Ard Biesheuvel wrote:
> On 26 March 2015 at 12:36, Russell King - ARM Linux
> <linux at arm.linux.org.uk> wrote:
> > On Wed, Mar 25, 2015 at 10:46:14AM +0000, Dave Martin wrote:
> >> Hmmm, you seem to be right.
> >>
> >> Thumb has no bx <label> instruction, and veneers introduced by ld are
> >> always ARM code, so this looks tricky to avoid without patching ld.
> >>
> >> As you observe, this only impacts large kernels anyway.
> >>
> >> So,
> >>
> >> Reviewed-by: Dave Martin <Dave.Martin at arm.com>
> >
> > Someone needs to check what the result is like for older CPUs too.
> >
> 
> Any specific concerns? The --pic-veneer switch dates back to 2009, so
> it's been around for a while

BX.  Not every CPU supports BX.

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