https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116887
--- Comment #15 from chenglulu <chenglulu at loongson dot cn> ---
(In reply to chenglulu from comment #14)
> (In reply to Xi Ruoyao from comment #13)
> > Hmm I do think 2 is better. It seems we are just "reinventing" the GOT in
> > 1.
> >
> > So OK with your approach if it passes regtest.
>
> I agree, I'll test the patch
extern struct rtld_global _rtld_global;
static struct dl_find_object_internal _dlfo_main __attribute__ ((section
(".data.rel.ro")));
extern void _dlfo_process_initial_noncontiguous_map (void);
void
_dlfo_process_initial (void)
{
if ( _dlfo_main.map == &_rtld_global._dl_rtld_map)
_dlfo_process_initial_noncontiguous_map ();
}
I've been looking at this code for the past two days, and I think the second
modification is incomplete. The reason for the problem is:
If decls are put in ".data.rel.ro" or ".data.rel.ro.local" using the
__attribute__ construct （_dlfo_main）, then the obtained section flags contain
only SECTION_WRITE and not SECTION_RELRO.
But labels are placed in the constant pool ("data.rel.ro" or
"data.rel.ro.local") (_rtld_global._dl_rtld_map), the section flags contain
both SECTION_WRITE and SECTION_RELRO.
Since two sections are the same, but the flags are set differently, then can
cause a section conflicts.
