xref: /openbmc/linux/arch/arm/include/asm/traps.h (revision 68198dca)
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
50