Re: [PATCH v3] strip: keep .ctf section in stripped file

["Guillermo E. Martinez" <guillermo.e.martinez@oracle.com>]

Hello,

On Fri, Mar 03, 2023 at 12:24:19PM +0000, Nick Clifton wrote:
> Hi Mark,
> 
> > > > I am mainly wondering why binutils strip already seems to keep ".ctf"
> > > > sections (even without -g).
> 
> > Right. But I am wondering how that mechanism works with binutils strip.
> > Apparently we do something different in eu-strip which makes it
> > necessary to add a --keep-ctf option based on the section name. It
> > would be good if we figured out how/what we can do to keep the
> > different strip utilities in sync.
> 
> I think that the function that does this is "is_strip_section_1" in

That's right, this function decided whether the section will be striped
out by default, if it has set `SEC_DEBUGGING' in BFD section flags then
section is removed by the default.  For `.ctf' this flag is not set
because in `_bfd_elf_make_section_from_shdr' when BFD sections are
building it uses the section's name: ".debug", ".gnu.debuglto_.debug_",
".gnu.linkonce.wi.", ".zdebug", "lines", ".stab", etc, to set
`SEC_DEBUGGING' flag.

> binutils/objcopy.c.  If an input section has the BSF_DEBUGGING flag
> set (an internal flag to he BFD library, but basically it should be
> set for all debug sections, including .ctf sections I think), then
> the basic decision is to keep the section unless -g is used.
> 
> Cheers
>   Nick
> 

Kind regards,
guillermo