arch/arm/include/asm/traps.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASMARM_TRAP_H
   3 #define _ASMARM_TRAP_H
   4
   5 #include <linux/list.h>
   6
   7 struct pt_regs;
   8 struct task_struct;
   9
  10 struct undef_hook {
  11         struct list_head node;
  12         u32 instr_mask;
  13         u32 instr_val;
  14         u32 cpsr_mask;
  15         u32 cpsr_val;
  16         int (*fn)(struct pt_regs *regs, unsigned int instr);
  17 };
  18
  19 void register_undef_hook(struct undef_hook *hook);
  20 void unregister_undef_hook(struct undef_hook *hook);
  21
  22 static inline int __in_irqentry_text(unsigned long ptr)
  23 {
  24         extern char __irqentry_text_start[];
  25         extern char __irqentry_text_end[];
  26
  27         return ptr >= (unsigned long)&__irqentry_text_start &&
  28                ptr < (unsigned long)&__irqentry_text_end;
  29 }
  30
  31 static inline int in_exception_text(unsigned long ptr)
  32 {
  33         extern char __exception_text_start[];
  34         extern char __exception_text_end[];
  35         int in;
  36
  37         in = ptr >= (unsigned long)&__exception_text_start &&
  38              ptr < (unsigned long)&__exception_text_end;
  39
  40         return in ? : __in_irqentry_text(ptr);
  41 }
  42
  43 extern void __init early_trap_init(void *);
  44 extern void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame);
  45 extern void ptrace_break(struct task_struct *tsk, struct pt_regs *regs);
  46
  47 extern void *vectors_page;
  48
  49 #endif