[PATCH] arm: Prevent GCC from using VFP registers in code used during dynamic linking

[Joseph Myers]

On Tue, 12 May 2026, Aurelien Jarno wrote:

> - glibc (or rather ld.so) is built without VFP support. In that case 
>   there is no need to save and restore VFP registers, as they are not 
>   clobbered.

All the usual reasons apply for user code possibly being run during symbol 
resolution that might clobber those registers.

> Therefore I think there is just a need to test support at build time. I 
> guess checking for HAVE_ARM_PCS_VFP and HAVE_ARM_PCS_VFP_D32 is enough.

Whether VFP is used at build time is separate from whether the VFP AAPCS 
variant is used.

-- 
Joseph S. Myers
josmyers@redhat.com