arch/arm/include/asm/traps.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASMARM_TRAP_H
#define _ASMARM_TRAP_H

#include <linux/linkage.h>
#include <linux/list.h>

struct pt_regs;
struct task_struct;

struct undef_hook {
	struct list_head node;
	u32 instr_mask;
	u32 instr_val;
	u32 cpsr_mask;
	u32 cpsr_val;
	int (*fn)(struct pt_regs *regs, unsigned int instr);
};

void register_undef_hook(struct undef_hook *hook);
void unregister_undef_hook(struct undef_hook *hook);

static inline int __in_irqentry_text(unsigned long ptr)
{
	extern char __irqentry_text_start[];
	extern char __irqentry_text_end[];

	return ptr >= (unsigned long)&__irqentry_text_start &&
	       ptr < (unsigned long)&__irqentry_text_end;
}

extern void early_trap_init(void *);
extern void dump_backtrace_entry(unsigned long where, unsigned long from,
				 unsigned long frame, const char *loglvl);
extern void ptrace_break(struct pt_regs *regs);

extern void *vectors_page;

asmlinkage void dump_backtrace_stm(u32 *stack, u32 instruction, const char *loglvl);
asmlinkage void do_undefinstr(struct pt_regs *regs);
asmlinkage void handle_fiq_as_nmi(struct pt_regs *regs);
asmlinkage void bad_mode(struct pt_regs *regs, int reason);
asmlinkage int arm_syscall(int no, struct pt_regs *regs);
asmlinkage void baddataabort(int code, unsigned long instr, struct pt_regs *regs);
asmlinkage void __div0(void);
asmlinkage void handle_bad_stack(struct pt_regs *regs);

#endif