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, 185 deletions

diff --git a/sysdeps/tile/nptl/tls.h b/sysdeps/tile/nptl/tls.h
deleted file mode 100644
index 45d6c53e21..0000000000
--- a/sysdeps/tile/nptl/tls.h
+++ /dev/null
@@ -1,185 +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/>.  */
-
-#ifndef _TLS_H
-#define _TLS_H	1
-
-# include <dl-sysdep.h>
-
-#ifndef __ASSEMBLER__
-# include <stdbool.h>
-# include <stddef.h>
-# include <stdint.h>
-# include <dl-dtv.h>
-
-#else /* __ASSEMBLER__ */
-# include <tcb-offsets.h>
-#endif /* __ASSEMBLER__ */
-
-
-#ifndef __ASSEMBLER__
-
-/* Get system call information.  */
-# include <sysdep.h>
-
-/* The TP points to the start of the thread blocks.  */
-# define TLS_DTV_AT_TP	1
-# define TLS_TCB_AT_TP	0
-
-/* We use the multiple_threads field in the pthread struct */
-#define TLS_MULTIPLE_THREADS_IN_TCB	1
-
-/* Get the thread descriptor definition.  */
-# include <nptl/descr.h>
-
-/* The stack_guard is accessed directly by GCC -fstack-protector code,
-   so it is a part of public ABI.  The dtv and pointer_guard fields
-   are private.  */
-typedef struct
-{
-  void *feedback_data;
-  uintptr_t pointer_guard;
-  uintptr_t stack_guard;
-  dtv_t *dtv;
-} tcbhead_t;
-
-/* This is the size of the initial TCB.  Because our TCB is before the thread
-   pointer, we don't need this.  */
-# define TLS_INIT_TCB_SIZE	0
-
-/* Alignment requirements for the initial TCB.  */
-# define TLS_INIT_TCB_ALIGN	__alignof__ (struct pthread)
-
-/* This is the size of the TCB.  Because our TCB is before the thread
-   pointer, we don't need this.  */
-# define TLS_TCB_SIZE		0
-
-/* Alignment requirements for the TCB.  */
-# define TLS_TCB_ALIGN		__alignof__ (struct pthread)
-
-/* This is the size we need before TCB - actually, it includes the TCB.  */
-# define TLS_PRE_TCB_SIZE \
-  (sizeof (struct pthread)						      \
-   + ((sizeof (tcbhead_t) + TLS_TCB_ALIGN - 1) & ~(TLS_TCB_ALIGN - 1)))
-
-/* Return the thread descriptor (tp) for the current thread.  */
-register void *__thread_pointer asm ("tp");
-
-/* The thread pointer (in hardware register tp) points to the end of
-   the TCB.  The pthread_descr structure is immediately in front of the TCB.  */
-# define TLS_TCB_OFFSET	0
-
-/* Install the dtv pointer.  The pointer passed is to the element with
-   index -1 which contain the length.  */
-# define INSTALL_DTV(tcbp, dtvp) \
-  (((tcbhead_t *) (tcbp))[-1].dtv = (dtvp) + 1)
-
-/* Install new dtv for current thread.  */
-# define INSTALL_NEW_DTV(dtv) (THREAD_DTV() = (dtv))
-
-/* Return dtv of given thread descriptor.  */
-# define GET_DTV(tcbp)	(((tcbhead_t *) (tcbp))[-1].dtv)
-
-/* Code to initially initialize the thread pointer (tp).  */
-# define TLS_INIT_TP(tcbp) \
-    (__thread_pointer = (char *)(tcbp) + TLS_TCB_OFFSET, NULL)
-
-/* Value passed to 'clone' for initialization of the thread register.  */
-# define TLS_DEFINE_INIT_TP(tp, pd) \
-  void *tp = (void *) (pd) + TLS_TCB_OFFSET + TLS_PRE_TCB_SIZE
-
-/* Return the address of the dtv for the current thread.  */
-# define THREAD_DTV() \
-    (((tcbhead_t *) (__thread_pointer - TLS_TCB_OFFSET))[-1].dtv)
-
-/* Return the thread descriptor for the current thread.  */
-# define THREAD_SELF \
-    ((struct pthread *) (__thread_pointer \
-			 - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE))
-
-/* Magic for libthread_db to know how to do THREAD_SELF.  */
-# define DB_THREAD_SELF \
- REGISTER (64, 64, REG_TP * 8, - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)
-
-/* Read member of the thread descriptor directly.  */
-# define THREAD_GETMEM(descr, member) (descr->member)
-
-/* Same as THREAD_GETMEM, but the member offset can be non-constant.  */
-# define THREAD_GETMEM_NC(descr, member, idx) \
-    (descr->member[idx])
-
-/* Set member of the thread descriptor directly.  */
-# define THREAD_SETMEM(descr, member, value) \
-    (descr->member = (value))
-
-/* Same as THREAD_SETMEM, but the member offset can be non-constant.  */
-# define THREAD_SETMEM_NC(descr, member, idx, value) \
-    (descr->member[idx] = (value))
-
-/* Set the stack guard field in TCB head.  */
-# define THREAD_SET_STACK_GUARD(value) \
-    (((tcbhead_t *) ((char *) __thread_pointer				      \
-		     - TLS_TCB_OFFSET))[-1].stack_guard = (value))
-# define THREAD_COPY_STACK_GUARD(descr) \
-    (((tcbhead_t *) ((char *) (descr)					      \
-		     + TLS_PRE_TCB_SIZE))[-1].stack_guard		      \
-     = ((tcbhead_t *) ((char *) __thread_pointer			      \
-		       - TLS_TCB_OFFSET))[-1].stack_guard)
-
-/* Set the pointer guard field in TCB head.  */
-# define THREAD_GET_POINTER_GUARD() \
-    (((tcbhead_t *) ((char *) __thread_pointer				      \
-		     - TLS_TCB_OFFSET))[-1].pointer_guard)
-# define THREAD_SET_POINTER_GUARD(value) \
-    (THREAD_GET_POINTER_GUARD () = (value))
-# define THREAD_COPY_POINTER_GUARD(descr) \
-    (((tcbhead_t *) ((char *) (descr)					      \
-		     + TLS_PRE_TCB_SIZE))[-1].pointer_guard		      \
-     = THREAD_GET_POINTER_GUARD())
-
-/* l_tls_offset == 0 is perfectly valid on Tile, so we have to use some
-   different value to mean unset l_tls_offset.  */
-# define NO_TLS_OFFSET		-1
-
-/* Get and set the global scope generation counter in struct pthread.  */
-#define THREAD_GSCOPE_IN_TCB      1
-#define THREAD_GSCOPE_FLAG_UNUSED 0
-#define THREAD_GSCOPE_FLAG_USED   1
-#define THREAD_GSCOPE_FLAG_WAIT   2
-#define THREAD_GSCOPE_RESET_FLAG() \
-  do									     \
-    { int __res								     \
-	= atomic_exchange_rel (&THREAD_SELF->header.gscope_flag,	     \
-			       THREAD_GSCOPE_FLAG_UNUSED);		     \
-      if (__res == THREAD_GSCOPE_FLAG_WAIT)				     \
-	lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1, LLL_PRIVATE);   \
-    }									     \
-  while (0)
-#define THREAD_GSCOPE_SET_FLAG() \
-  do									     \
-    {									     \
-      THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED;	     \
-      atomic_write_barrier ();						     \
-    }									     \
-  while (0)
-#define THREAD_GSCOPE_WAIT() \
-  GL(dl_wait_lookup_done) ()
-
-#endif /* __ASSEMBLER__ */
-
-#endif /* tls.h */