http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53708
--- Comment #10 from rguenther at suse dot de <rguenther at suse dot de> 2012-10-30 17:10:52 UTC --- On Tue, 30 Oct 2012, bergner at gcc dot gnu.org wrote: > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53708 > > Peter Bergner <bergner at gcc dot gnu.org> changed: > > What |Removed |Added > ---------------------------------------------------------------------------- > Status|RESOLVED |REOPENED > CC| |bergner at gcc dot gnu.org > Resolution|FIXED | > > --- Comment #9 from Peter Bergner <bergner at gcc dot gnu.org> 2012-10-30 > 15:47:57 UTC --- > Richard, I'm seeing this same bug in GCC 4.7 on powerpc64-linux when compiling > GLIBC. Is there a chance we can get your patch backported to 4.7? I > bootstrapped and regtested the backport with no regressions and can confirm it > fixes the bug I'm running into, which can be seen with the reduced test case > from glibc: > > bergner@bns:~/gcc/BUGS> cat foo.i > static void (*const init_array []) (void) > __attribute__ ((section (".init_array"), aligned (sizeof (void *)), used)) > = { 0 }; > > bergner@bns:~/gcc/BUGS> /home/bergner/gcc/build/gcc-fsf-4_7-base/gcc/xgcc > -B/home/bergner/gcc/build/gcc-fsf-4_7-base/gcc -S -m64 -O3 -maltivec foo.i -o > bad.s > > bergner@bns:~/gcc/BUGS> /home/bergner/gcc/build/gcc-fsf-4_7-pr53708/gcc/xgcc > -B/home/bergner/gcc/build/gcc-fsf-4_7-pr53708/gcc -S -m64 -O3 -maltivec foo.i > -o good.s > > bergner@bns:~/gcc/BUGS> diff -u bad.s good.s > --- bad.s 2012-10-30 10:41:15.000000000 -0500 > +++ good.s 2012-10-30 10:41:23.000000000 -0500 > @@ -2,7 +2,7 @@ > .section ".toc","aw" > .section ".text" > .section .init_array,"a" > - .align 4 > + .align 3 > .type init_array, @object > .size init_array, 8 > init_array: > > The above is bad, because the extra alignment causes the linker to add some > null padding to the init_array and the loader isn't expecting that and ends up > segv'ing. Certainly - but can you check there wasn't a followup for fallout? ISTR something here ...
