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-rw-r--r--libc/sysdeps/linux/arm/sigrestorer.S40
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diff --git a/libc/sysdeps/linux/arm/sigrestorer.S b/libc/sysdeps/linux/arm/sigrestorer.S
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+/* Copyright (C) 1999 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sys/syscall.h>
+
+/* If no SA_RESTORER function was specified by the application we use
+ one of these. This avoids the need for the kernel to synthesise a return
+ instruction on the stack, which would involve expensive cache flushes. */
+
+.globl __default_sa_restorer;
+.type __default_sa_restorer,%function
+.align 4;
+__default_sa_restorer:
+ swi __NR_sigreturn
+
+
+#ifdef __NR_rt_sigreturn
+
+.globl __default_rt_sa_restorer;
+.type __default_rt_sa_restorer,%function
+.align 4;
+__default_rt_sa_restorer:
+ swi __NR_rt_sigreturn
+
+#endif