From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/arc/include/uapi/asm/signal.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 arch/arc/include/uapi/asm/signal.h (limited to 'arch/arc/include/uapi/asm/signal.h') diff --git a/arch/arc/include/uapi/asm/signal.h b/arch/arc/include/uapi/asm/signal.h new file mode 100644 index 000000000..ba3143a1b --- /dev/null +++ b/arch/arc/include/uapi/asm/signal.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * 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 + +#endif /* _ASM_ARC_SIGNAL_H */ -- cgit v1.2.3