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, 159 deletions

diff --git a/sysdeps/tile/dl-runtime.c b/sysdeps/tile/dl-runtime.c
deleted file mode 100644
index 6ad9769..0000000
--- a/sysdeps/tile/dl-runtime.c
+++ /dev/null
@@ -1,159 +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/>.  */
-
-/* Like x86_64, we pass the index of the relocation and not its offset.
-   In _dl_profile_fixup and _dl_call_pltexit we also use the index.
-   Therefore it is wasteful to compute the offset in the trampoline
-   just to reverse the operation immediately afterwards.  */
-#define reloc_offset reloc_arg * sizeof (PLTREL)
-#define reloc_index  reloc_arg
-
-#include <elf/dl-runtime.c>
-
-#include <sys/mman.h>
-#include <arch/sim.h>
-#include <dl-unmap-segments.h>
-
-/* Like realpath(), but simplified: no dynamic memory use, no lstat(),
-   no set_errno(), no valid "rpath" on error, etc.  This handles some
-   simple cases where the simulator might not have a valid entry for
-   a loaded Elf object, in particular dlopen() with a relative path.
-   For this relatively rare case, one could also imagine using
-   link_map.l_origin to avoid the getcwd() here, but the simpler code
-   here seems like a better solution.  */
-static char *
-dl_realpath (const char *name, char *rpath)
-{
-  char *dest;
-  const char *start, *end;
-
-  if (name[0] != '/')
-    {
-      if (!__getcwd (rpath, PATH_MAX))
-        return NULL;
-      dest = __rawmemchr (rpath, '\0');
-    }
-  else
-    {
-      rpath[0] = '/';
-      dest = rpath + 1;
-    }
-
-  for (start = end = name; *start; start = end)
-    {
-      /* Skip sequence of multiple path-separators.  */
-      while (*start == '/')
-	++start;
-
-      /* Find end of path component.  */
-      for (end = start; *end && *end != '/'; ++end)
-	/* Nothing.  */;
-
-      if (end - start == 0)
-	break;
-      else if (end - start == 1 && start[0] == '.')
-	/* nothing */;
-      else if (end - start == 2 && start[0] == '.' && start[1] == '.')
-	{
-	  /* Back up to previous component, ignore if at root already.  */
-	  if (dest > rpath + 1)
-	    while ((--dest)[-1] != '/');
-	}
-      else
-	{
-	  if (dest[-1] != '/')
-	    *dest++ = '/';
-
-	  if (dest + (end - start) >= rpath + PATH_MAX)
-            return NULL;
-
-	  dest = __mempcpy (dest, start, end - start);
-	  *dest = '\0';
-	}
-    }
-  if (dest > rpath + 1 && dest[-1] == '/')
-    --dest;
-  *dest = '\0';
-
-  return rpath;
-}
-
-/* Support notifying the simulator about new objects.  */
-void
-_dl_after_load (struct link_map *l)
-{
-  int shift;
-  char pathbuf[PATH_MAX];
-  char *path;
-
-  /* Don't bother if not in the simulator. */
-  if (__insn_mfspr (SPR_SIM_CONTROL) == 0)
-    return;
-
-#define DLPUTC(c) __insn_mtspr (SPR_SIM_CONTROL,                         \
-                                (SIM_CONTROL_DLOPEN                      \
-                                 | ((c) << _SIM_CONTROL_OPERATOR_BITS)))
-
-  /* Write the library address in hex.  */
-  DLPUTC ('0');
-  DLPUTC ('x');
-  for (shift = (int) sizeof (unsigned long) * 8 - 4; shift >= 0; shift -= 4)
-    DLPUTC ("0123456789abcdef"[(l->l_map_start >> shift) & 0xF]);
-  DLPUTC (':');
-
-  /* Write the library path, including the terminating '\0'.  */
-  path = dl_realpath (l->l_name, pathbuf) ?: l->l_name;
-  for (size_t i = 0;; i++)
-    {
-      DLPUTC (path[i]);
-      if (path[i] == '\0')
-        break;
-    }
-#undef DLPUTC
-}
-
-/* Support notifying the simulator about removed objects prior to munmap().  */
-static void
-sim_dlclose (ElfW(Addr) map_start)
-{
-  int shift;
-
-  /* Don't bother if not in the simulator.  */
-  if (__insn_mfspr (SPR_SIM_CONTROL) == 0)
-    return;
-
-#define DLPUTC(c) __insn_mtspr (SPR_SIM_CONTROL,                         \
-                                (SIM_CONTROL_DLCLOSE                     \
-                                 | ((c) << _SIM_CONTROL_OPERATOR_BITS)))
-
-  /* Write the library address in hex.  */
-  DLPUTC ('0');
-  DLPUTC ('x');
-  for (shift = (int) sizeof (unsigned long) * 8 - 4; shift >= 0; shift -= 4)
-    DLPUTC ("0123456789abcdef"[(map_start >> shift) & 0xF]);
-  DLPUTC ('\0');
-
-#undef DLPUTC
-}
-
-void
-_dl_unmap (struct link_map *map)
-{
-  sim_dlclose (map->l_map_start);
-  _dl_unmap_segments (map);
-}