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Date: Wed, 26 Aug 2015 23:47:23 -0400
From: Rich Felker <>
Subject: Re: [PATCH v10] Build process uses script to add CFI
 directives to x86 asm

On Thu, Aug 27, 2015 at 05:38:12AM +0200, Alex wrote:
> On Wed, Aug 26, 2015 at 10:29 PM, Rich Felker <> wrote:
> > On Fri, Jul 10, 2015 at 03:03:24PM +0200, Alex Dowad wrote:
> >> Some functions implemented in asm need to use EBP for purposes other than acting
> >> as a frame pointer. (Notably, it is used for the 6th argument to syscalls with
> >> 6 arguments.) Without frame pointers, GDB can only show backtraces if it gets
> >> CFI information from a .debug_frame or .eh_frame ELF section.
> >> [...]
> >
> > Committed, finally!
> >
> > Sorry for the long delay. I was using this locally without problem and
> > somehow forgot that I had not actually committed it despite saying I
> > would do so if no problems were found.
> >
> > The only change I made was re-folding the commit message to fit well
> > in 80 columns.
> So I guess a script for x86-64 is needed now?

Yes, that would be great. I'm trying to package up 1.1.11 now, so
maybe we can plan to get the x86_64 CFI committed somewhere early in
the next release cycle?

Thanks again for your work on this!


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