Relocate AArch64 from ports to libc.

This patch moves the AArch64 port to the main sysdeps hierarchy.  The
move is essentially:

  git mv ports/sysdeps/aarch64 sysdeps/aarch64
  git mv ports/sysdeps/unix/sysv/linux/aarch64 sysdeps/unix/sysv/linux/aarch64

The README is updated and I've updated ChangeLog.aarch64 along the
lines of the ARM move.  The AArch64 build has been tested to confirm
that there were no changes in objdump -dr output or the shared
objects.

1 files changed, 60 insertions, 0 deletions

diff --git a/sysdeps/aarch64/bits/link.h b/sysdeps/aarch64/bits/link.h
new file mode 100644
index 0000000000..fe068276ea
--- /dev/null
+++ b/sysdeps/aarch64/bits/link.h
@@ -0,0 +1,60 @@
+/* Copyright (C) 2005-2014 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef	_LINK_H
+# error "Never include <bits/link.h> directly; use <link.h> instead."
+#endif
+
+/* Registers for entry into PLT on AArch64.  */
+typedef struct La_aarch64_regs
+{
+  uint64_t lr_xreg[8];
+  uint64_t lr_dreg[8];
+  uint64_t lr_sp;
+  uint64_t lr_lr;
+} La_aarch64_regs;
+
+/* Return values for calls from PLT on AArch64.  */
+typedef struct La_aarch64_retval
+{
+  /* Up to two integer registers can be used for a return value.  */
+  uint64_t lrv_xreg[2];
+  /* Up to four D registers can be used for a return value.  */
+  uint64_t lrv_dreg[4];
+
+} La_aarch64_retval;
+__BEGIN_DECLS
+
+extern Elf64_Addr
+la_aarch64_gnu_pltenter (Elf64_Sym *__sym, unsigned int __ndx,
+			 uintptr_t *__refcook,
+			 uintptr_t *__defcook,
+			 La_aarch64_regs *__regs,
+			 unsigned int *__flags,
+			 const char *__symname,
+			 long int *__framesizep);
+
+extern unsigned int
+la_aarch64_gnu_pltexit (Elf64_Sym *__sym, unsigned int __ndx,
+			uintptr_t *__refcook,
+			uintptr_t *__defcook,
+			const La_aarch64_regs *__inregs,
+			La_aarch64_retval *__outregs,
+			const char *__symname);
+
+__END_DECLS