[PATCH 0/2] aarch64: Fix issue causing out-of-range relocations

[Richard Earnshaw (foss)]

On 06/01/2026 10:54, Richard Earnshaw wrote:
> We've been seeing reports that users are encoutering issues with
> out-of-range relocation failures on aarch64 despite the linker having
> code that is supposed to insert long-branch veneers for this
> situation.  Investigation suggests that it is related to the
> mitigations used for one of the Cortex-a53 errata that is perturbing
> the results of an earlier calculation and is in fact leading to the
> veneer being too far from the original branch to be reachable.
> 
> The solution to this problem is to adjust the order in which we do the
> calculations so that the problematic pass is run before we create the
> veneer stub groups (the pass creates its own stubs and doesn't rely on
> the stub groups).
> 
> This short series contains two patches.  The first isn't strictly
> necessary, but fixes a minor issue in the names of some symbols: we
> try to look up the name of the target symbol, but sometimes that is
> empty and we thus create a rather anonymous symbol for the stub as
> well.  This patch addresses this by using the section name for this
> case.
> 
> The second patch is the main bug fix and is in fact less complicated
> than the diff implies; it simply moves the pass that scans for erratum
> 843419 before the code that creates the section groups.
> 
> I'll hold off pushing this for a couple of days, just to allow others
> to have a look at the change.
> 
> R.

Now pushed.

R.

> 
> Richard Earnshaw (2):
>   aarch64: Use section names for empty stub symbols
>   aarch64: Fix out-of-range branch veneers when --fix-cortex-a53-843419
> 
>  bfd/elfnn-aarch64.c                           | 51 ++++++++++-------
>  ld/testsuite/ld-aarch64/farcall-b-section.d   | 10 ++--
>  ld/testsuite/ld-aarch64/farcall-bl-section.d  | 10 ++--
>  .../ld-aarch64/protections/bti-far-1.d        | 18 +++---
>  .../ld-aarch64/protections/bti-far-2.d        | 16 +++---
>  .../ld-aarch64/protections/bti-far-opt.d      | 56 +++++++++----------
>  6 files changed, 85 insertions(+), 76 deletions(-)
>