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1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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2 | /* |
3 | * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License version 2 as |
7 | * published by the Free Software Foundation. |
8 | * |
9 | * Amit Bhor, Sameer Dhavale: Codito Technologies 2004 |
10 | */ |
11 | |
12 | #ifndef _ASM_ARC_SIGNAL_H |
13 | #define _ASM_ARC_SIGNAL_H |
14 | |
15 | /* |
16 | * This is much needed for ARC sigreturn optimization. |
17 | * This allows uClibc to piggback the addr of a sigreturn stub in sigaction, |
18 | * which allows sigreturn based re-entry into kernel after handling signal. |
19 | * W/o this kernel needs to "synthesize" the sigreturn trampoline on user |
20 | * mode stack which in turn forces the following: |
21 | * -TLB Flush (after making the stack page executable) |
22 | * -Cache line Flush (to make I/D Cache lines coherent) |
23 | */ |
24 | #define SA_RESTORER 0x04000000 |
25 | |
26 | #include <asm-generic/signal.h> |
27 | |
28 | #endif /* _ASM_ARC_SIGNAL_H */ |
29 |
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