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Diffstat (limited to 'sysdeps/unix/sysv/linux/nios2/getcontext.S')
-rw-r--r--sysdeps/unix/sysv/linux/nios2/getcontext.S66
1 files changed, 66 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/nios2/getcontext.S b/sysdeps/unix/sysv/linux/nios2/getcontext.S
new file mode 100644
index 0000000000..ffbd91f72a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/getcontext.S
@@ -0,0 +1,66 @@
+/* Save current context.
+   Copyright (C) 2015 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+#include "ucontext_i.h"
+
+/* int getcontext (ucontext_t *ucp)
+
+   Returns 0 on success -1 and errno on failure.
+ */
+	.text
+ENTRY(__getcontext)
+	stw	r16, (UCONTEXT_MCONTEXT + 16*4)(r4)
+	stw	r17, (UCONTEXT_MCONTEXT + 17*4)(r4)
+	stw	r18, (UCONTEXT_MCONTEXT + 18*4)(r4)
+	stw	r19, (UCONTEXT_MCONTEXT + 19*4)(r4)
+	stw	r20, (UCONTEXT_MCONTEXT + 20*4)(r4)
+	stw	r21, (UCONTEXT_MCONTEXT + 21*4)(r4)
+	stw	r22, (UCONTEXT_MCONTEXT + 22*4)(r4)
+	stw	ra,  (UCONTEXT_MCONTEXT + 24*4)(r4)
+	stw	fp,  (UCONTEXT_MCONTEXT + 25*4)(r4)
+	stw	gp,  (UCONTEXT_MCONTEXT + 26*4)(r4)
+	/* Store return address at place for EA.  */
+	stw	ra,  (UCONTEXT_MCONTEXT + 28*4)(r4)
+	stw	sp,  (UCONTEXT_MCONTEXT + 29*4)(r4)
+	/* Store zero for return success.  */
+	stw	zero, (UCONTEXT_MCONTEXT + 2*4)(r4)
+
+	/* Store value "1" at uc_flags to recognize as getcontext created.  */
+	movi	r2, 1
+	stw	r2, UCONTEXT_FLAGS(r4)
+
+	/* Store MCONTEXT_VERSION at first word of mcontext_t.  */
+	movi	r2, MCONTEXT_VERSION
+	stw	r2, UCONTEXT_MCONTEXT(r4)
+
+	/* Get signal mask.  */
+	/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
+	movi	r7, _NSIG8
+	addi	r6, r4, UCONTEXT_SIGMASK
+	mov	r5, zero
+	movi	r4, SIG_BLOCK
+	movi	r2, SYS_ify (rt_sigprocmask)
+	trap
+	bne	r7, zero, SYSCALL_ERROR_LABEL
+
+	mov	r2, zero
+	ret
+
+PSEUDO_END(__getcontext)
+weak_alias(__getcontext, getcontext)