Re: PATCH: Very interesting IA64 gas bug

["H. J. Lu" <hjl at lucon dot org>]

On Sun, Jun 08, 2003 at 01:32:25PM -0700, Ian Lance Taylor wrote:
> Jim Wilson <wilson@tuliptree.org> writes:
> 
> > On Sat, 2003-06-07 at 08:15, H. J. Lu wrote:
> > > The one on my list is to fix elf_fake_sections so that type section
> > > type doesn't depend on section name. We have 20 bits to use in
> > > struct sec. Should I give it a shot?
> > 
> > I suppose if you really want to try, it wouldn't hurt.  I am not really
> > a bfd expert, but I suspect it will be hard to get bfd to stop using
> > section names.  They are used in too many places in bfd.  This is one of
> > the reasons why Ulrich Drepper came up with libelf.  libelf doesn't use
> > section names for classifying sections.
> 
> It's not especially hard to fix BFD ELF.  The easy way is to add
> fields to bfd_elf_section_data for the type and entry size and
> whatever else you happen to need.  Add ELF specific functions which
> the assembler calls to set this information--along the lines of
> bfd_elf_set_dt_needed_name() (well, that's called by the linker, but
> the idea is the same).  Have the assembler set these fields, and have
> the linker and objcopy preserve them.
> 
> Make sure that every ELF flag is analagous to a BFD section flag, and
> use those.

One other thing I like to support is multiple sections with the same
name for SHT_GROUP:

http://gcc.gnu.org/ml/gcc/2003-04/msg00214.html

What is the best way to support it?



H.J.