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, 141 deletions

diff --git a/sysdeps/tile/__tls_get_addr.S b/sysdeps/tile/__tls_get_addr.S
deleted file mode 100644
index 078f37750c..0000000000
--- a/sysdeps/tile/__tls_get_addr.S
+++ /dev/null
@@ -1,141 +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 <tls.h>
-#include <bits/wordsize.h>
-
-#if __WORDSIZE == 64
-#define LOG_SIZEOF_DTV_T 4
-#else
-#define LOG_SIZEOF_DTV_T 3
-#endif
-
-/* On entry, r0 points to two words, the module and the offset.
-   On return, r0 holds the pointer to the relevant TLS memory.
-   Only registers r25..r29 are clobbered by the call.  */
-
-	.text
-ENTRY (__tls_get_addr)
-	{
-	 lnk r25
-	 ADDI_PTR r27, tp, DTV_OFFSET
-	}
-.Llnk:
-	{
-	 LD_PTR r27, r27	/* r27 = THREAD_DTV() */
-	 moveli r26, hw1_last(_rtld_local + TLS_GENERATION_OFFSET - .Llnk)
-	}
-	shl16insli r26, r26, hw0(_rtld_local + TLS_GENERATION_OFFSET - .Llnk)
-	{
-	 ADD_PTR r25, r25, r26
-	 LD_PTR r26, r0		/* r26 = ti_module */
-	}
-	LD_PTR r25, r25		/* r25 = DL(dl_tls_generation) */
-	{
-	 LD_PTR r28, r27	/* r28 = THREAD_DTV()->counter */
-	 ADDI_PTR r29, r0, __SIZEOF_POINTER__
-	}
-	{
-	 LD_PTR r29, r29	/* r29 = ti_offset */
-	 cmpeq r25, r28, r25	/* r25 nonzero if generation OK */
-	 shli r28, r26, LOG_SIZEOF_DTV_T  /* byte index into dtv array */
-	}
-	{
-	 beqz r25, .Lslowpath
-	 cmpeqi r25, r26, -1	/* r25 nonzero if ti_module invalid */
-	}
-	{
-	 bnez r25, .Lslowpath
-	 ADD_PTR r28, r28, r27	/* pointer into module array */
-	}
-	LD_PTR r26, r28		/* r26 = module TLS pointer */
-	cmpeqi r25, r26, -1     /* check r26 == TLS_DTV_UNALLOCATED */
-	bnez r25, .Lslowpath
-	{
-	 ADD_PTR r0, r26, r29
-	 jrp lr
-	}
-
-.Lslowpath:
-	{
-	 st sp, lr
-	 ADDLI_PTR r29, sp, - (25 * REGSIZE)
-	}
-	cfi_offset (lr, 0)
-	{
-	 st r29, sp
-	 ADDLI_PTR sp, sp, - (26 * REGSIZE)
-	}
-	cfi_def_cfa_offset (26 * REGSIZE)
-	ADDI_PTR r29, sp, (2 * REGSIZE)
-	{ st r29, r1;  ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r2;  ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r3;  ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r4;  ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r5;  ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r6;  ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r7;  ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r8;  ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r9;  ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r10; ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r11; ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r12; ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r13; ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r14; ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r15; ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r16; ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r17; ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r18; ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r19; ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r20; ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r21; ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r22; ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r23; ADDI_PTR r29, r29, REGSIZE }
-	{ st r29, r24; ADDI_PTR r29, r29, REGSIZE }
-	.hidden __tls_get_addr_slow
-	jal __tls_get_addr_slow
-	ADDI_PTR r29, sp, (2 * REGSIZE)
-	{ ld r1,  r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r2,  r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r3,  r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r4,  r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r5,  r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r6,  r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r7,  r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r8,  r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r9,  r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r10, r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r11, r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r12, r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r13, r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r14, r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r15, r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r16, r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r17, r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r18, r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r19, r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r20, r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r21, r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r22, r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r23, r29; ADDI_PTR r29, r29, REGSIZE }
-	{ ld r24, r29; ADDLI_PTR sp, sp, (26 * REGSIZE) }
-	cfi_def_cfa_offset (0)
-	ld lr, sp
-	jrp lr
-END (__tls_get_addr)