Move tilegx, tilepro, and linux-generic from ports to libc.

I've moved the TILE-Gx and TILEPro ports to the main sysdeps hierarchy,
along with the linux-generic ports infrastructure.  Beyond the README
update, the move was just

    git mv ports/sysdeps/tile sysdeps/tile
    git mv ports/sysdeps/unix/sysv/linux/tile \
      sysdeps/unix/sysv/linux/tile
    git mv ports/sysdeps/unix/sysv/linux/generic \
      sysdeps/unix/sysv/linux/generic

I updated the relevant ChangeLogs along the lines of the ARM move
in commit c6bfe5c4d75 and tested the 64-bit tilegx build to confirm that
there were no changes in "objdump -dr" output in the shared objects.

1 files changed, 124 insertions, 0 deletions

diff --git a/sysdeps/tile/crti.S b/sysdeps/tile/crti.S
new file mode 100644
index 0000000000..55eb238866
--- /dev/null
+++ b/sysdeps/tile/crti.S
@@ -0,0 +1,124 @@
+/* Special .init and .fini section support for tile.
+   Copyright (C) 2012-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file with other
+   programs, and to distribute those programs without any restriction
+   coming from the use of this file. (The GNU Lesser General Public
+   License restrictions do apply in other respects; for example, they
+   cover modification of the file, and distribution when not linked
+   into another program.)
+
+   Note that people who make modified versions of this file are not
+   obligated to grant this special exception for their modified
+   versions; it is their choice whether to do so. The GNU Lesser
+   General Public License gives permission to release a modified
+   version without this exception; this exception also makes it
+   possible to release a modified version which carries forward this
+   exception.
+
+   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/>.  */
+
+/* crti.S puts a function prologue at the beginning of the .init and
+   .fini sections and defines global symbols for those addresses, so
+   they can be called as functions.  The symbols _init and _fini are
+   magic and cause the linker to emit DT_INIT and DT_FINI.  */
+
+#include <libc-symbols.h>
+#include <sysdep.h>
+
+#ifndef PREINIT_FUNCTION
+# define PREINIT_FUNCTION __gmon_start__
+#endif
+
+#ifndef PREINIT_FUNCTION_WEAK
+# define PREINIT_FUNCTION_WEAK 1
+#endif
+
+#if PREINIT_FUNCTION_WEAK
+	weak_extern (PREINIT_FUNCTION)
+#else
+	.hidden PREINIT_FUNCTION
+#endif
+
+	.section .init,"ax",@progbits
+	.align 8
+	.globl _init
+	.type _init, @function
+_init:
+	{
+	 move r29, sp
+	 ADDI_PTR r28, sp, -REGSIZE
+	 ST sp, lr
+	}
+	ADDI_PTR sp, sp, -(2 * REGSIZE)
+	ST r28, r29
+#if PREINIT_FUNCTION_WEAK
+	lnk r2
+0:
+# ifdef __tilegx__
+	moveli r1, hw2_last(_GLOBAL_OFFSET_TABLE_ - 0b)
+	{
+	 shl16insli r1, r1, hw1(_GLOBAL_OFFSET_TABLE_ - 0b)
+	 moveli r0, hw1_last_got(PREINIT_FUNCTION)
+	}
+	{
+	 shl16insli r1, r1, hw0(_GLOBAL_OFFSET_TABLE_ - 0b)
+	 shl16insli r0, r0, hw0_got(PREINIT_FUNCTION)
+	}
+# else
+	{
+	 moveli r1, lo16(_GLOBAL_OFFSET_TABLE_ - 0b)
+	 moveli r0, got_lo16(PREINIT_FUNCTION)
+	}
+	{
+	 auli r1, r1, ha16(_GLOBAL_OFFSET_TABLE_ - 0b)
+	 auli r0, r0, got_ha16(PREINIT_FUNCTION)
+	}
+# endif
+	ADD_PTR r0, r0, r1
+	ADD_PTR r0, r0, r2
+	LD_PTR r0, r0
+	BEQZ r0, .Lno_weak_fn
+	jalr r0
+#elif defined(__tilegx__) && !defined(NO_PLT_PCREL)
+	/* Since we are calling from the start of the object to the PLT,
+	   call by loading the full address into a register.  */
+	lnk r2
+0:
+	moveli r0, hw2_last_plt(PREINIT_FUNCTION - 0b)
+	shl16insli r0, r0, hw1_plt(PREINIT_FUNCTION - 0b)
+	shl16insli r0, r0, hw0_plt(PREINIT_FUNCTION - 0b)
+	add r0, r0, r2
+	jalr r0
+#else
+	jal plt(PREINIT_FUNCTION)
+#endif
+.Lno_weak_fn:
+
+	.section .fini,"ax",@progbits
+	.align 8
+	.globl _fini
+	.type _fini, @function
+_fini:
+	{
+	 move r29, sp
+	 ADDI_PTR r28, sp, -REGSIZE
+	 ST sp, lr
+	}
+	ADDI_PTR sp, sp, -(2 * REGSIZE)
+	ST r28, r29