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, 44 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/tile/setjmp.S b/libc/sysdeps/linux/tile/setjmp.S
new file mode 100644
index 000000000..86bdacbdb
--- /dev/null
+++ b/libc/sysdeps/linux/tile/setjmp.S
@@ -0,0 +1,44 @@
+/* Copyright (C) 2011-2018 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.
+
+   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 <sysdep.h>
+#include <jmpbuf-offsets.h>
+
+	.text
+
+	/* Keep traditional entry points in with sigsetjmp(). */
+ENTRY(setjmp)
+	{ movei r1, 1; j 1f }
+END(setjmp)
+
+ENTRY(_setjmp)
+	{ movei r1, 0; j 1f }
+END(_setjmp)
+libc_hidden_def (_setjmp)
+
+ENTRY(__sigsetjmp)
+1:
+	move r2, r0
+
+#define SAVE(r) { st r2, r ; ADDI_PTR r2, r2, REGSIZE }
+	FOR_EACH_CALLEE_SAVED_REG(SAVE)
+
+	mfspr r3, INTERRUPT_CRITICAL_SECTION
+	st r2, r3
+	j plt(__sigjmp_save)
+	jrp lr   /* Keep the backtracer happy. */
+END(__sigsetjmp)
+hidden_def (__sigsetjmp)