1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * arch/parisc/include/asm/kprobes.h
4  *
5  * PA-RISC kprobes implementation
6  *
7  * Copyright (c) 2019 Sven Schnelle <svens@stackframe.org>
8  */
9 
10 #ifndef _PARISC_KPROBES_H
11 #define _PARISC_KPROBES_H
12 
13 #ifdef CONFIG_KPROBES
14 
15 #include <asm-generic/kprobes.h>
16 #include <linux/types.h>
17 #include <linux/ptrace.h>
18 #include <linux/notifier.h>
19 
20 #define PARISC_KPROBES_BREAK_INSN	0x3ff801f
21 #define PARISC_KPROBES_BREAK_INSN2	0x3ff801e
22 #define  __ARCH_WANT_KPROBES_INSN_SLOT
23 #define MAX_INSN_SIZE 2
24 
25 typedef u32 kprobe_opcode_t;
26 struct kprobe;
27 
28 void arch_remove_kprobe(struct kprobe *p);
29 
30 #define flush_insn_slot(p) \
31 	flush_icache_range((unsigned long)&(p)->ainsn.insn[0], \
32 			   (unsigned long)&(p)->ainsn.insn[0] + \
33 			   MAX_INSN_SIZE*sizeof(kprobe_opcode_t))
34 
35 #define kretprobe_blacklist_size    0
36 
37 struct arch_specific_insn {
38 	kprobe_opcode_t *insn;
39 };
40 
41 struct prev_kprobe {
42 	struct kprobe *kp;
43 	unsigned long status;
44 };
45 
46 struct kprobe_ctlblk {
47 	unsigned int kprobe_status;
48 	struct prev_kprobe prev_kprobe;
49 	unsigned long iaoq[2];
50 };
51 
52 int __kprobes parisc_kprobe_break_handler(struct pt_regs *regs);
53 int __kprobes parisc_kprobe_ss_handler(struct pt_regs *regs);
kprobe_fault_handler(struct pt_regs * regs,int trapnr)54 static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
55 {
56 	return 0;
57 }
58 
59 #endif /* CONFIG_KPROBES */
60 #endif /* _PARISC_KPROBES_H */
61