1 /* SPDX-License-Identifier: GPL-2.0-only */
2 #ifndef __ASM_LOONGARCH_KPROBES_H
3 #define __ASM_LOONGARCH_KPROBES_H
4
5 #include <asm-generic/kprobes.h>
6
7 #ifdef CONFIG_KPROBES
8
9 #include <asm/inst.h>
10 #include <asm/cacheflush.h>
11
12 #define __ARCH_WANT_KPROBES_INSN_SLOT
13 #define MAX_INSN_SIZE 2
14
15 #define flush_insn_slot(p) \
16 do { \
17 if (p->addr) \
18 flush_icache_range((unsigned long)p->addr, \
19 (unsigned long)p->addr + \
20 (MAX_INSN_SIZE * sizeof(kprobe_opcode_t))); \
21 } while (0)
22
23 #define kretprobe_blacklist_size 0
24
25 typedef u32 kprobe_opcode_t;
26
27 /* Architecture specific copy of original instruction */
28 struct arch_specific_insn {
29 /* copy of the original instruction */
30 kprobe_opcode_t *insn;
31 /* restore address after simulation */
32 unsigned long restore;
33 };
34
35 struct prev_kprobe {
36 struct kprobe *kp;
37 unsigned int status;
38 };
39
40 /* per-cpu kprobe control block */
41 struct kprobe_ctlblk {
42 unsigned int kprobe_status;
43 unsigned long saved_status;
44 struct prev_kprobe prev_kprobe;
45 };
46
47 void arch_remove_kprobe(struct kprobe *p);
48 bool kprobe_fault_handler(struct pt_regs *regs, int trapnr);
49 bool kprobe_breakpoint_handler(struct pt_regs *regs);
50 bool kprobe_singlestep_handler(struct pt_regs *regs);
51
52 #else /* !CONFIG_KPROBES */
53
54 static inline bool kprobe_breakpoint_handler(struct pt_regs *regs) { return false; }
55 static inline bool kprobe_singlestep_handler(struct pt_regs *regs) { return false; }
56
57 #endif /* CONFIG_KPROBES */
58 #endif /* __ASM_LOONGARCH_KPROBES_H */
59
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