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PATCH: PR ld/3958: ELF linker failed to handle relocation against STN_UNDEF

Daniel Jacobowitz drow@false.org
Tue Mar 6 00:28:00 GMT 2007 
On Tue, Mar 06, 2007 at 10:22:39AM +1030, Alan Modra wrote:
> On Sat, Mar 03, 2007 at 03:04:22PM -0800, H. J. Lu wrote:
> > But we shouldn't use STN_UNDEF to indicate relocations
> > against symbols from removed input sections since STN_UNDEF simply
> > means 0 as the symbol value for relocation.
> 
> Agreed.  We should instead either relocate against the corresponding
> symbol from the kept section and emit a reloc against that symbol, or
> zero the section contents and emit an R_*_NONE reloc.  The difficulty
> is that this means touching all the ELF backend relocate_section
> functions, because we need the reloc howto function to know which bits
> need zeroing.  Also, the section contents will need to be cleared on
> a relocatable link.

This should happen in more or less the same places my previous broken
patch touched all the backends, though - shouldn't it?

-- 
Daniel Jacobowitz
CodeSourcery
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