Re: [PATCH][AArch64] Add more cfi annotations to tlsdesc entry points

[Florian Weimer <fweimer at redhat dot com>]

On 12/09/2016 06:38 PM, Richard Henderson wrote:
> On 12/09/2016 05:23 AM, Szabolcs Nagy wrote:
> >  	stp	x1,  x2, [sp, #32+16*0]
> > +	cfi_rel_offset (x1, 32)
> > +	cfi_rel_offset (x2, 32+8)
> >  	stp	x3,  x4, [sp, #32+16*1]
> > +	cfi_rel_offset (x3, 32+16)
> > +	cfi_rel_offset (x4, 32+24)
>
> FWIW, you'll produce equivalent, but smaller unwind info if you put all of the
> cfi_rel_offsets together (constrained by the assembly for when the original
> register values change.  So
>
> 	stp	x1, x2, [sp, #32+16*0]
> 	stp	x3, x4, [sp, #32+16*1]
> 	cfi_rel_offset (x1, 32)
> 	cfi_rel_offset (x2, 32+8)
> 	cfi_rel_offset (x3, 32+16)
> 	cfi_rel_offset (x4, 32+24)

Will this cause problems with async cancellation?

Thanks,
Florian