| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| 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 */ |