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, 243 deletions

diff --git a/sysdeps/unix/sysv/linux/tile/sysdep.h b/sysdeps/unix/sysv/linux/tile/sysdep.h
deleted file mode 100644
index 9827e4b0b2..0000000000
--- a/sysdeps/unix/sysv/linux/tile/sysdep.h
+++ /dev/null
@@ -1,243 +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 <asm/unistd.h>
-#include <sysdeps/tile/sysdep.h>
-#include <sysdeps/unix/sysv/linux/generic/sysdep.h>
-#include <sys/syscall.h>
-
-#undef SYS_ify
-#define SYS_ify(syscall_name)	__NR_##syscall_name
-
-
-#ifdef __ASSEMBLER__
-
-/* The actual implementation of doing a syscall. */
-#define DO_CALL(syscall_name, args)                     \
-  moveli TREG_SYSCALL_NR_NAME, SYS_ify(syscall_name);	\
-  swint1
-
-/* TILE Linux returns the result in r0 (or a negative errno).
-   The kernel "owns" the code to decide if a given value is an error,
-   and puts errno in r1 if so, or otherwise zero.  */
-#define	PSEUDO(name, syscall_name, args)		\
-  ENTRY	(name);						\
-  DO_CALL(syscall_name, args);				\
-  BNEZ r1, 0f
-
-#define ret  jrp lr
-
-#ifndef SHARED
-/* For static code, on error jump to __syscall_error directly. */
-# define SYSCALL_ERROR_NAME __syscall_error
-#elif IS_IN (libc) || IS_IN (libpthread)
-/* Use the internal name for libc/libpthread shared objects. */
-# define SYSCALL_ERROR_NAME __GI___syscall_error
-#else
-/* Otherwise, on error do a full PLT jump. */
-# define SYSCALL_ERROR_NAME plt(__syscall_error)
-#endif
-
-#undef PSEUDO_END
-#define	PSEUDO_END(name)				\
-0:							\
-  j SYSCALL_ERROR_NAME;					\
-  END (name)
-
-#undef PSEUDO_NOERRNO
-#define	PSEUDO_NOERRNO(name, syscall_name, args)	\
-  ENTRY	(name);						\
-  DO_CALL(syscall_name, args)
-
-#define ret_NOERRNO  jrp lr
-
-#undef PSEUDO_END_NOERRNO
-#define	PSEUDO_END_NOERRNO(name) \
-  END (name)
-
-/* Convenience wrappers. */
-#define SYSCALL__(name, args)   PSEUDO (__##name, name, args)
-#define SYSCALL(name, args)   PSEUDO (name, name, args)
-
-#else /* not __ASSEMBLER__ */
-
-#include <errno.h>
-
-/* Define a macro which expands inline into the wrapper code for a system
-   call.  */
-# undef INLINE_SYSCALL
-# define INLINE_SYSCALL(name, nr, args...)                              \
-  ({                                                                    \
-    INTERNAL_SYSCALL_DECL (_sc_err);                                    \
-    unsigned long _sc_val = INTERNAL_SYSCALL (name, _sc_err, nr, args); \
-    if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (_sc_val, _sc_err), 0)) \
-    {                                                                   \
-      __set_errno (INTERNAL_SYSCALL_ERRNO (_sc_val, _sc_err));          \
-      _sc_val = -1;                                                     \
-    }                                                                   \
-    (long) _sc_val;                                                     \
-  })
-
-#undef INTERNAL_SYSCALL
-#define INTERNAL_SYSCALL(name, err, nr, args...)        \
-  internal_syscall##nr (SYS_ify (name), err, args)
-
-#undef INTERNAL_SYSCALL_NCS
-#define INTERNAL_SYSCALL_NCS(number, err, nr, args...)  \
-  internal_syscall##nr (number, err, args)
-
-#undef INTERNAL_SYSCALL_DECL
-#define INTERNAL_SYSCALL_DECL(err) int err
-
-#undef INTERNAL_SYSCALL_ERROR_P
-#define INTERNAL_SYSCALL_ERROR_P(val, err) ({ (void) (val); (err) != 0; })
-
-#undef INTERNAL_SYSCALL_ERRNO
-#define INTERNAL_SYSCALL_ERRNO(val, err) ({ (void) (val); (err); })
-
-#define internal_syscall0(num, err, dummy...)                           \
-  ({                                                                    \
-    long _sys_result, __SYSCALL_CLOBBER_DECLS;                          \
-    __asm__ __volatile__ (                                              \
-      "swint1"                                                          \
-      : "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS   \
-      : "R10" (num)                                                     \
-      : __SYSCALL_CLOBBERS);                                            \
-    _sys_result;                                                        \
-  })
-
-#define internal_syscall1(num, err, arg0)                               \
-  ({                                                                    \
-    long _sys_result, __SYSCALL_CLOBBER_DECLS;                          \
-    __asm__ __volatile__ (                                              \
-      "swint1"                                                          \
-      : "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS   \
-      : "R10" (num), "R00" (arg0)                                       \
-      : __SYSCALL_CLOBBERS);                                            \
-    _sys_result;                                                        \
-  })
-
-#define internal_syscall2(num, err, arg0, arg1)                         \
-  ({                                                                    \
-    long _sys_result, __SYSCALL_CLOBBER_DECLS;                          \
-    __asm__ __volatile__ (                                              \
-      "swint1"                                                          \
-      : "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS   \
-      : "R10" (num), "R00" (arg0), "R01" (arg1)                         \
-      : __SYSCALL_CLOBBERS);                                            \
-    _sys_result;                                                        \
-  })
-
-#define internal_syscall3(num, err, arg0, arg1, arg2)                   \
-  ({                                                                    \
-    long _sys_result, __SYSCALL_CLOBBER_DECLS;                          \
-    __asm__ __volatile__ (                                              \
-      "swint1"                                                          \
-      : "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS   \
-      : "R10" (num), "R00" (arg0), "R01" (arg1), "R02" (arg2)           \
-      : __SYSCALL_CLOBBERS);                                            \
-    _sys_result;                                                        \
-  })
-
-#define internal_syscall4(num, err, arg0, arg1, arg2, arg3)             \
-  ({                                                                    \
-    long _sys_result, __SYSCALL_CLOBBER_DECLS;                          \
-    __asm__ __volatile__ (                                              \
-      "swint1"                                                          \
-      : "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS   \
-      : "R10" (num), "R00" (arg0), "R01" (arg1), "R02" (arg2),          \
-        "R03" (arg3)                                                    \
-      : __SYSCALL_CLOBBERS);                                            \
-    _sys_result;                                                        \
-  })
-
-#define internal_syscall5(num, err, arg0, arg1, arg2, arg3, arg4)       \
-  ({                                                                    \
-    long _sys_result, __SYSCALL_CLOBBER_DECLS;                          \
-    __asm__ __volatile__ (                                              \
-      "swint1"                                                          \
-      : "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS   \
-      : "R10" (num), "R00" (arg0), "R01" (arg1), "R02" (arg2),          \
-        "R03" (arg3), "R04" (arg4)                                      \
-      : __SYSCALL_CLOBBERS);                                            \
-    _sys_result;                                                        \
-  })
-
-#define internal_syscall6(num, err, arg0, arg1, arg2, arg3, arg4, arg5) \
-  ({                                                                    \
-    long _sys_result, __SYSCALL_CLOBBER_DECLS;                          \
-    __asm__ __volatile__ (                                              \
-      "swint1"                                                          \
-      : "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS   \
-      : "R10" (num), "R00" (arg0), "R01" (arg1), "R02" (arg2),          \
-        "R03" (arg3), "R04" (arg4), "R05" (arg5)                        \
-      : __SYSCALL_CLOBBERS);                                            \
-    _sys_result;                                                        \
-  })
-
-#undef __SYSCALL_CLOBBERS
-#define __SYSCALL_CLOBBERS                                      \
-  "r6",  "r7",                                                  \
-    "r8",  "r9",        "r11", "r12", "r13", "r14", "r15",      \
-    "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",     \
-    "r24", "r25", "r26", "r27", "r28", "r29", "memory"
-
-/* gcc doesn't seem to allow an input operand to be clobbered, so we
-   fake it with dummy outputs. */
-#define __SYSCALL_CLOBBER_DECLS                                         \
-  _clobber_r2, _clobber_r3, _clobber_r4, _clobber_r5, _clobber_r10
-
-#define __SYSCALL_CLOBBER_OUTPUTS                                       \
-  "=R02" (_clobber_r2), "=R03" (_clobber_r3), "=R04" (_clobber_r4),     \
-    "=R05" (_clobber_r5), "=R10" (_clobber_r10)
-
-
-#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...)               \
-  ({                                                                    \
-    struct syscall_return_value _sc_rv = funcptr (args);                \
-    err = _sc_rv.error;                                                 \
-    _sc_rv.value;                                                       \
-  })
-
-/* List of system calls which are supported as vsyscalls.  */
-#define HAVE_CLOCK_GETTIME_VSYSCALL	1
-#define HAVE_GETTIMEOFDAY_VSYSCALL	1
-
-/* Previously tile used the generic version without the libc_hidden_def
-   which lead in a non existent __send symbol in libc.so.  */
-#undef HAVE_INTERNAL_SEND_SYMBOL
-
-#endif /* __ASSEMBLER__  */
-
-/* Pointer mangling support.  */
-#if IS_IN (rtld)
-/* We cannot use the thread descriptor because in ld.so we use setjmp
-   earlier than the descriptor is initialized.  */
-#else
-# ifdef __ASSEMBLER__
-#  define PTR_MANGLE(reg, tmpreg) \
-	ADDLI_PTR tmpreg, pt, POINTER_GUARD; \
-	LD	tmpreg, tmpreg; \
-	xor	reg, tmpreg, reg
-#  define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
-# else
-#  define PTR_MANGLE(var) \
-  (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
-#  define PTR_DEMANGLE(var)	PTR_MANGLE (var)
-# endif
-#endif