On Tue, Nov 12, 2024 at 01:08:16PM +0000, Mark Brown wrote: > + // This has to come after we set PSTATE.SM > +check_fpmr_in: > + tbz x0, #HAVE_FPMR_SHIFT, wait_for_writes > + adrp x7, fpmr_in > + ldr x7, [x7, :lo12:fpmr_in] > + msr FPMR, x7 Did this build for you? I may not have a new enough assembler. fp-ptrace-asm.S:149:6: error: expected writable system register or pstate msr FPMR, x7 I changed it to REG_FPMR locally. -- Catalin