> On Wed, Feb 16, 2011 at 8:09 PM, John David Anglin wrote: > > On Wed, 16 Feb 2011, John David Anglin wrote: > >> I would like to apply the following binutils change to align data > >> segments to a page boundary. =A0However, it breaks building glibc. > >> Problem occurs in call_init trying to run constructors for new > >> libc.so.6. > > > > It's probably not a glibc issue: > > > > /home2/dave/debian/glibc/eglibc-2.11.2/build-tree/hppa-libc/libc.so.6: = > =A0 =A0 file > > format elf32-hppa-linux > > > > Contents of section .init_array: > > =A0159008 ffffffff 0015bee2 00000000 =A0 =A0 =A0 =A0 =A0 ............ > > glibc-2.12 and earlier (and perhaps 2.12.[12] too) are known to be > miscompiled by binutils versions newer than 2.21.50.xxx. the issue > has been fixed in glibc-2.13 though ... > > http://bugs.gentoo.org/351177 While this is probably the same issue, there is no debugging of the segv in the above bug report or in the referenced bugzilla report: http://sourceware.org/bugzilla/show_bug.cgi?id=12379 I filed this report last night: http://sourceware.org/bugzilla/show_bug.cgi?id=12499 My analysis indicates the segv is a binutils issue. It was likely introduced by the following change: 2010-12-15 H.J. Lu <hongjiu.lu@xxxxxxxxx> * Makefile.am (GENSCRIPTS): Add @enable_initfini_array@. * NEWS: Mention SORT_BY_INIT_PRIORITY. * configure.in: Add AC_CANONICAL_BUILD. Add --enable-initfini-array. * genscripts.sh (ENABLE_INITFINI_ARRAY): New. ... Binutils should not merge the special function pointers used to mark the start and end of the .ctors/.dtors lists. This could be tested for in libc, but this is inefficient. On architectures that use function descriptors, function pointer comparisons are messy. Do we want to call the infamous cffc in the dynamic loader? Casts of function pointers to integer types are implementation defined and pointer sizes can vary. So, the simple hack could break. In my opinion, binutils should be fixed to work with old glibc versions. There is a work around in my binutils PR. Dave -- J. David Anglin dave.anglin@xxxxxxxxxxxxxx National Research Council of Canada (613) 990-0752 (FAX: 952-6602) -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
