tile: add basic support for tilegx

This adds basic support for tile architecture.
Only static binaries, no ld.so or threading support.
Tested with qemu-tilegx only.

1 files changed, 68 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/tile/crti.S b/libc/sysdeps/linux/tile/crti.S
new file mode 100644
index 000000000..e355cca29
--- /dev/null
+++ b/libc/sysdeps/linux/tile/crti.S
@@ -0,0 +1,68 @@
+/* Special .init and .fini section support for tile.
+   Copyright (C) 2012-2018 Free Software Foundation, Inc.
+
+   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 <sysdep.h>
+
+
+	.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
+.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