LXR linux/arch/arm64/include/asm/traps.h

   1/*
   2 * Based on arch/arm/include/asm/traps.h
   3 *
   4 * Copyright (C) 2012 ARM Ltd.
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18#ifndef __ASM_TRAP_H
  19#define __ASM_TRAP_H
  20
  21#include <linux/list.h>
  22#include <asm/sections.h>
  23
  24struct pt_regs;
  25
  26struct undef_hook {
  27        struct list_head node;
  28        u32 instr_mask;
  29        u32 instr_val;
  30        u64 pstate_mask;
  31        u64 pstate_val;
  32        int (*fn)(struct pt_regs *regs, u32 instr);
  33};
  34
  35void register_undef_hook(struct undef_hook *hook);
  36void unregister_undef_hook(struct undef_hook *hook);
  37
  38void arm64_notify_segfault(struct pt_regs *regs, unsigned long addr);
  39
  40#ifdef CONFIG_FUNCTION_GRAPH_TRACER
  41static inline int __in_irqentry_text(unsigned long ptr)
  42{
  43        return ptr >= (unsigned long)&__irqentry_text_start &&
  44               ptr < (unsigned long)&__irqentry_text_end;
  45}
  46#else
  47static inline int __in_irqentry_text(unsigned long ptr)
  48{
  49        return 0;
  50}
  51#endif
  52
  53static inline int in_exception_text(unsigned long ptr)
  54{
  55        int in;
  56
  57        in = ptr >= (unsigned long)&__exception_text_start &&
  58             ptr < (unsigned long)&__exception_text_end;
  59
  60        return in ? : __in_irqentry_text(ptr);
  61}
  62
  63#endif
  64