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