Re: Dynamic section symbols, ignored output sections

[ligang at sunnorth dot com dot cn]

Alan Modra <amodra@bigpond.net.au> wrote on 2006-10-17 21:24:27:

> On Thu, Oct 12, 2006 at 01:13:41PM +0930, Alan Modra wrote:
> > a) Detecting a symbol assignment in a linker script should result in 
the
> >    section alignment and vma being honoured.
> > b) All the ELF backends will need changes so that removed output 
section
> >    syms are never used when emitting relocs.  At the same time, we may
> >    as well just use one section sym for all relocs (or two for targets
> >    that might want to relocate the data segment separately from the 
text
> >    segment).
> > c) _bfd_fix_excluded_sec_syms should be changed to not create absolute
> >    syms.
> 
> This patch does all of the above, plus adjusts the ld testsuite for
> the changes.  A number of ELF targets will now use no dynamic section
> symbols while others will just use one (or two when TLS is involved).
> I started looking at FRV, and decided to leave the dyn sym change to a
> target maintainer because it seemed likely to me that I'd break
> something..  I also won't commit the S+core patch included here until
> I get the OK from Mei Ligang;  It changes elf32-score.c to use the
> zero index symbol on dynamic relocations rather than use section
> symbols.  This is desirable on a new target as it should speed ld.so
> slightly, but of course the dynamic linker support needs to be
> available.
 
It is OK.
 
> Alan Modra
> IBM OzLabs - Linux Technology Centre