xref: /openbmc/linux/arch/arm/include/asm/traps.h (revision 8ee90c5c)
1 #ifndef _ASMARM_TRAP_H
2 #define _ASMARM_TRAP_H
3 
4 #include <linux/list.h>
5 
6 struct pt_regs;
7 struct task_struct;
8 
9 struct undef_hook {
10 	struct list_head node;
11 	u32 instr_mask;
12 	u32 instr_val;
13 	u32 cpsr_mask;
14 	u32 cpsr_val;
15 	int (*fn)(struct pt_regs *regs, unsigned int instr);
16 };
17 
18 void register_undef_hook(struct undef_hook *hook);
19 void unregister_undef_hook(struct undef_hook *hook);
20 
21 static inline int __in_irqentry_text(unsigned long ptr)
22 {
23 	extern char __irqentry_text_start[];
24 	extern char __irqentry_text_end[];
25 
26 	return ptr >= (unsigned long)&__irqentry_text_start &&
27 	       ptr < (unsigned long)&__irqentry_text_end;
28 }
29 
30 static inline int in_exception_text(unsigned long ptr)
31 {
32 	extern char __exception_text_start[];
33 	extern char __exception_text_end[];
34 	int in;
35 
36 	in = ptr >= (unsigned long)&__exception_text_start &&
37 	     ptr < (unsigned long)&__exception_text_end;
38 
39 	return in ? : __in_irqentry_text(ptr);
40 }
41 
42 extern void __init early_trap_init(void *);
43 extern void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame);
44 extern void ptrace_break(struct task_struct *tsk, struct pt_regs *regs);
45 
46 extern void *vectors_page;
47 
48 #endif
49