xref: /openbmc/linux/arch/sh/include/asm/kprobes.h (revision b6dcefde)
1 #ifndef __ASM_SH_KPROBES_H
2 #define __ASM_SH_KPROBES_H
3 
4 #ifdef CONFIG_KPROBES
5 
6 #include <linux/types.h>
7 #include <linux/ptrace.h>
8 
9 typedef insn_size_t kprobe_opcode_t;
10 #define BREAKPOINT_INSTRUCTION	0xc33a
11 
12 #define MAX_INSN_SIZE 16
13 #define MAX_STACK_SIZE 64
14 #define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
15 	(((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \
16 	? (MAX_STACK_SIZE) \
17 	: (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR)))
18 
19 #define regs_return_value(_regs)		((_regs)->regs[0])
20 #define flush_insn_slot(p)		do { } while (0)
21 #define kretprobe_blacklist_size	0
22 
23 struct kprobe;
24 
25 void arch_remove_kprobe(struct kprobe *);
26 void kretprobe_trampoline(void);
27 void jprobe_return_end(void);
28 
29 /* Architecture specific copy of original instruction*/
30 struct arch_specific_insn {
31 	/* copy of the original instruction */
32 	kprobe_opcode_t insn[MAX_INSN_SIZE];
33 };
34 
35 struct prev_kprobe {
36 	struct kprobe *kp;
37 	unsigned long status;
38 };
39 
40 /* per-cpu kprobe control block */
41 struct kprobe_ctlblk {
42 	unsigned long kprobe_status;
43 	unsigned long jprobe_saved_r15;
44 	struct pt_regs jprobe_saved_regs;
45 	kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
46 	struct prev_kprobe prev_kprobe;
47 };
48 
49 extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
50 extern int kprobe_exceptions_notify(struct notifier_block *self,
51 				    unsigned long val, void *data);
52 extern int kprobe_handle_illslot(unsigned long pc);
53 #else
54 
55 #define kprobe_handle_illslot(pc)	(-1)
56 
57 #endif /* CONFIG_KPROBES */
58 #endif /* __ASM_SH_KPROBES_H */
59