Remove tilegx port.

Since tile support has been removed from the Linux kernel for 4.17,
this patch removes the (unmaintained) port to tilegx from glibc (the
tilepro support having been previously removed).  This reflects the
general principle that a glibc port needs upstream support for the
architecture in all the components it build-depends on (so binutils,
GCC and the Linux kernel, for the normal case of a port supporting the
Linux kernel but no other OS), in order to be maintainable.

Apart from removal of sysdeps/tile and sysdeps/unix/sysv/linux/tile,
there are updates to various comments referencing tile for which
removal of those references seemed appropriate.  The configuration is
removed from README and from build-many-glibcs.py.  contrib.texi keeps
mention of removed contributions, but I updated Chris Metcalf's entry
to reflect that he also contributed the non-removed support for the
generic Linux kernel syscall interface.
__ASSUME_FADVISE64_64_NO_ALIGN support is removed, as it was only used
by tile.

	* sysdeps/tile: Remove.
	* sysdeps/unix/sysv/linux/tile: Likewise.
	* README (tilegx-*-linux-gnu): Remove from list of supported
	configurations.
	* manual/contrib.texi (Contributors): Mention Chris Metcalf's
	contribution of support for generic Linux kernel syscall
	interface.
	* scripts/build-many-glibcs.py (Context.add_all_configs): Remove
	tilegx configurations.
	(Config.install_linux_headers): Do not handle tile.
	* sysdeps/unix/sysv/linux/aarch64/ldsodefs.h: Do not mention Tile
	in comment.
	* sysdeps/unix/sysv/linux/nios2/Makefile: Likewise.
	* sysdeps/unix/sysv/linux/posix_fadvise.c: Likewise.
	[__ASSUME_FADVISE64_64_NO_ALIGN] (__ALIGNMENT_ARG): Remove
	conditional undefine and redefine.
	* sysdeps/unix/sysv/linux/posix_fadvise64.c: Do not mention Tile
	in comment.
	[__ASSUME_FADVISE64_64_NO_ALIGN] (__ALIGNMENT_ARG): Remove
	conditional undefine and redefine.

1 files changed, 0 insertions, 95 deletions

diff --git a/sysdeps/unix/sysv/linux/tile/getcontext.S b/sysdeps/unix/sysv/linux/tile/getcontext.S
deleted file mode 100644
index eedd2b78a1..0000000000
--- a/sysdeps/unix/sysv/linux/tile/getcontext.S
+++ /dev/null
@@ -1,95 +0,0 @@
-/* Copyright (C) 2011-2018 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
-
-   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/>.  */
-
-#include <sysdep.h>
-#include <arch/abi.h>
-
-#include "ucontext_i.h"
-
-/* int getcontext (ucontext_t *ucp) */
-
-	.text
-ENTRY (__getcontext)
-	FEEDBACK_ENTER(__getcontext)
-
-	/* Save the callee-saved GPRs.  There's no need to save the
-	   caller-saved GPRs since the eventual setcontext() or
-	   swapcontext() will assume those registers are all dead.
-	   Save value "1" to uc_flags to later recognize getcontext().  */
-	{ movei r11, 1; ADDI_PTR r10, r0, UC_FLAGS_OFFSET }
-	{ ST_PTR r10, r11; addli r10, r0, UC_REG(30) }
-	{ st r10, r30; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r31; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r32; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r33; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r34; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r35; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r36; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r37; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r38; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r39; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r40; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r41; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r42; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r43; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r44; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r45; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r46; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r47; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r48; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r49; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r50; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r51; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, r52; ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, tp;  ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, sp;  ADDI_PTR r10, r10, REGSIZE }
-	{ st r10, lr;  ADDI_PTR r10, r10, REGSIZE }
-	lnk r11   /* Point PC at the "jrp lr" instruction.  */
-	addli r11, r11, .Lreturn - .
-	{ st r10, r11; ADDI_PTR r10, r10, REGSIZE }
-	mfspr r11, INTERRUPT_CRITICAL_SECTION
-	{
-	 st r10, r11
-	 movei r1, 0
-	}
-
-	/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG / 8) */
-	{
-	 movei r3, _NSIG / 8
-	 addli r2, r0, UC_SIGMASK_OFFSET
-	}
-	{
-	 movei r0, SIG_BLOCK
-	 moveli TREG_SYSCALL_NR_NAME, __NR_rt_sigprocmask
-	}
-	swint1
-	bnez r1, .Lsyscall_error
-
-.Lreturn:
-	{
-	 movei r0, 0
-	 jrp lr
-	}
-
-.Lsyscall_error:
-	j SYSCALL_ERROR_NAME
-
-END (__getcontext)
-.hidden __getcontext
-
-weak_alias (__getcontext, getcontext)