* grub-core/kern/elf.c: check and switch endianess with grub_{be,le}_to
cpu functions.
* grub-core/kern/elfXX.c: Likewise.
Also-by: Tomohiro B Berry <tbberry@us.ibm.com>

* configure.ac: Add conditions to avoid libgcc dependency.
* Makefile.am: Likewise.
* Makefile.core.def: Include compiler-rt.S and compiler-rt.c.
* compiler-rt.c: New file.
* compiler-rt.S: Likewise.
* compiler-rt.h: Likewise.
Also-By: Brent Baude <bbaude@redhat.com>
Also-By: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>

libgcc dependency was removed *just* for this target because
the distros that use ppc64el doesn't have 32-bit support on it.

* configure.ac: Add targets for powerpc64el and skip libgcc.
* Makefile.am: Likewise.

	descriptor_size==0 to avoid potential divisions by zero.

	no division by 0 occurs.

	validity.

	* grub-core/fs/nilfs2.c (grub_nilfs2_valid_sb): Check that
	block size is <= 1GiB.

The unaligned local in __aeabi_uidivmod leads to a store to a 64bit
value at an address that is not divisible by 8 (in grub_divmod64).
The compiler most likely generates a STRD instruction to store it and
this causes an exception.

Fixes Savannah bug #43632.

This includes improvements done by Leif Lindholm.