ARC: ABI Implementation

This code deals with the ARC ABI.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/sysdeps/arc/__longjmp.S b/sysdeps/arc/__longjmp.S
new file mode 100644
index 0000000000..fcbf1bb6c0
--- /dev/null
+++ b/sysdeps/arc/__longjmp.S
@@ -0,0 +1,49 @@
+/* longjmp for ARC.
+   Copyright (C) 2020 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.
+
+   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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+#include <jmpbuf-offsets.h>
+
+/* @ r0 = jump buffer from which regs will be restored
+   @ r1 = value that setjmp( ) will return due to this longjmp.  */
+
+ENTRY (__longjmp)
+
+	LDR (blink, r0,  0)
+	LDR (sp,    r0,  1)
+	LDR (fp,    r0,  2)
+	LDR (gp,    r0,  3)
+
+	LDR (r13,   r0,  4)
+	LDR (r14,   r0,  5)
+	LDR (r15,   r0,  6)
+	LDR (r16,   r0,  7)
+	LDR (r17,   r0,  8)
+	LDR (r18,   r0,  9)
+	LDR (r19,   r0, 10)
+	LDR (r20,   r0, 11)
+	LDR (r21,   r0, 12)
+	LDR (r22,   r0, 13)
+	LDR (r23,   r0, 14)
+	LDR (r24,   r0, 15)
+
+	mov.f  r0, r1
+	j.d    [blink]
+	mov.z  r0, 1	/* don't return 0 to setjmp callsite from longjmp.  */
+
+END (__longjmp)