cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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signal.h (996B)

      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 */