summaryrefslogtreecommitdiff
path: root/arch/arc/include/uapi/asm/signal.h
diff options
context:
space:
mode:
authorVineet Gupta <vgupta@synopsys.com>2013-02-11 19:55:33 +0530
committerVineet Gupta <vgupta@synopsys.com>2013-02-15 23:16:11 +0530
commit8c2f4a8dd0e0fc9dcaf14c768544039eddfa7375 (patch)
tree2cee072559f4686dd070fdeb930b05e2aafa8449 /arch/arc/include/uapi/asm/signal.h
parentcbe056f76a386708f3807b274322f78269aee0f6 (diff)
ARC: UAPI Disintegrate arch/arc/include/asm
1. ./genfilelist.pl arch/arc/include/asm/ 2. Create arch/arc/include/uapi/asm/Kbuild as follows +# UAPI Header export list +include include/uapi/asm-generic/Kbuild.asm 3. ./disintegrate-one.pl arch/arc/include/{,uapi/}asm/<above-list> 4. Edit arch/arc/include/asm/Kbuild to remove ref to asm-generic/Kbuild.asm - To work around empty uapi/asm/setup.h added a placholder comment. - Also a manual #ifdef __ASSEMBLY__ for a late ptrace change Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: David Howells <dhowells@redhat.com>
Diffstat (limited to 'arch/arc/include/uapi/asm/signal.h')
-rw-r--r--arch/arc/include/uapi/asm/signal.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/arc/include/uapi/asm/signal.h b/arch/arc/include/uapi/asm/signal.h
new file mode 100644
index 000000000000..fad62f7f42d6
--- /dev/null
+++ b/arch/arc/include/uapi/asm/signal.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
+ */
+
+#ifndef _ASM_ARC_SIGNAL_H
+#define _ASM_ARC_SIGNAL_H
+
+/*
+ * This is much needed for ARC sigreturn optimization.
+ * This allows uClibc to piggback the addr of a sigreturn stub in sigaction,
+ * which allows sigreturn based re-entry into kernel after handling signal.
+ * W/o this kernel needs to "synthesize" the sigreturn trampoline on user
+ * mode stack which in turn forces the following:
+ * -TLB Flush (after making the stack page executable)
+ * -Cache line Flush (to make I/D Cache lines coherent)
+ */
+#define SA_RESTORER 0x04000000
+
+#include <asm-generic/signal.h>
+
+#endif /* _ASM_ARC_SIGNAL_H */