1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SH_KPROBES_H
3 #define __ASM_SH_KPROBES_H
4 
5 #include <asm-generic/kprobes.h>
6 
7 #define BREAKPOINT_INSTRUCTION	0xc33a
8 
9 #ifdef CONFIG_KPROBES
10 
11 #include <linux/types.h>
12 #include <linux/ptrace.h>
13 
14 typedef insn_size_t kprobe_opcode_t;
15 
16 #define MAX_INSN_SIZE 16
17 #define MAX_STACK_SIZE 64
18 #define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
19 	(((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \
20 	? (MAX_STACK_SIZE) \
21 	: (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR)))
22 
23 #define flush_insn_slot(p)		do { } while (0)
24 #define kretprobe_blacklist_size	0
25 
26 struct kprobe;
27 
28 void arch_remove_kprobe(struct kprobe *);
29 void __kretprobe_trampoline(void);
30 
31 /* Architecture specific copy of original instruction*/
32 struct arch_specific_insn {
33 	/* copy of the original instruction */
34 	kprobe_opcode_t insn[MAX_INSN_SIZE];
35 };
36 
37 struct prev_kprobe {
38 	struct kprobe *kp;
39 	unsigned long status;
40 };
41 
42 /* per-cpu kprobe control block */
43 struct kprobe_ctlblk {
44 	unsigned long kprobe_status;
45 	struct prev_kprobe prev_kprobe;
46 };
47 
48 extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
49 extern int kprobe_exceptions_notify(struct notifier_block *self,
50 				    unsigned long val, void *data);
51 extern int kprobe_handle_illslot(unsigned long pc);
52 #else
53 
54 #define kprobe_handle_illslot(pc)	(-1)
55 
56 #endif /* CONFIG_KPROBES */
57 #endif /* __ASM_SH_KPROBES_H */
58