Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Various improvements for ia64:
o s/TARGET_XFER_DIRTY/NATIVE_XFER_DIRTY/g to be conformant,
o Handle TARGET_OBJECT_DIRTY for core files. Required on Linux,
o Replace ia64_fbsd_supply_fpregs() and ia64_fbsd_supply_gregs()
with supply_fpregset() and supply_gregset() resp. Needed to
support libthread_db.
o For target_read_partial(), pass the address of bspstore as the
annex instead of bspstore itself. This fixes crossbuilds. The
annex is a pointer, while bspstore is a ULONGEST.
o In ia64_frame_prev_register(), handle dirty stacked registers.

This commit was generated by cvs2svn to compensate for changes in r131082,
which included commits to RCS files with non-trunk default branches.

Add support for ia64. This code will be contributed to GDB as soon
as the legal prerequisites are met. To avoid future merge conflicts,
this is added to the vendor branch. The changes are seperately kept
in FREEBSD-diffs for easy reference.