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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef _ASM_POWERPC_KPROBES_H
3#define _ASM_POWERPC_KPROBES_H
4
5#include <asm-generic/kprobes.h>
6
7#ifdef __KERNEL__
8/*
9 * Kernel Probes (KProbes)
10 *
11 * Copyright (C) IBM Corporation, 2002, 2004
12 *
13 * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
14 * Probes initial implementation ( includes suggestions from
15 * Rusty Russell).
16 * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli
17 * <ananth@in.ibm.com>
18 */
19#include <linux/types.h>
20#include <linux/ptrace.h>
21#include <linux/percpu.h>
22#include <linux/module.h>
23#include <asm/probes.h>
24#include <asm/code-patching.h>
25
26#ifdef CONFIG_KPROBES
27#define __ARCH_WANT_KPROBES_INSN_SLOT
28
29struct pt_regs;
30struct kprobe;
31
32typedef u32 kprobe_opcode_t;
33
34extern kprobe_opcode_t optinsn_slot;
35
36/* Optinsn template address */
37extern kprobe_opcode_t optprobe_template_entry[];
38extern kprobe_opcode_t optprobe_template_op_address[];
39extern kprobe_opcode_t optprobe_template_call_handler[];
40extern kprobe_opcode_t optprobe_template_insn[];
41extern kprobe_opcode_t optprobe_template_call_emulate[];
42extern kprobe_opcode_t optprobe_template_ret[];
43extern kprobe_opcode_t optprobe_template_end[];
44
45/* Fixed instruction size for powerpc */
46#define MAX_INSN_SIZE 2
47#define MAX_OPTIMIZED_LENGTH sizeof(kprobe_opcode_t) /* 4 bytes */
48#define MAX_OPTINSN_SIZE (optprobe_template_end - optprobe_template_entry)
49#define RELATIVEJUMP_SIZE sizeof(kprobe_opcode_t) /* 4 bytes */
50
51#define flush_insn_slot(p) do { } while (0)
52#define kretprobe_blacklist_size 0
53
54void __kretprobe_trampoline(void);
55extern void arch_remove_kprobe(struct kprobe *p);
56
57/* Architecture specific copy of original instruction */
58struct arch_specific_insn {
59 /* copy of original instruction */
60 kprobe_opcode_t *insn;
61 /*
62 * Set in kprobes code, initially to 0. If the instruction can be
63 * eumulated, this is set to 1, if not, to -1.
64 */
65 int boostable;
66};
67
68struct prev_kprobe {
69 struct kprobe *kp;
70 unsigned long status;
71 unsigned long saved_msr;
72};
73
74/* per-cpu kprobe control block */
75struct kprobe_ctlblk {
76 unsigned long kprobe_status;
77 unsigned long kprobe_saved_msr;
78 struct prev_kprobe prev_kprobe;
79};
80
81struct arch_optimized_insn {
82 kprobe_opcode_t copied_insn[1];
83 /* detour buffer */
84 kprobe_opcode_t *insn;
85};
86
87extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
88extern int kprobe_handler(struct pt_regs *regs);
89extern int kprobe_post_handler(struct pt_regs *regs);
90#else
91static inline int kprobe_handler(struct pt_regs *regs) { return 0; }
92static inline int kprobe_post_handler(struct pt_regs *regs) { return 0; }
93#endif /* CONFIG_KPROBES */
94#endif /* __KERNEL__ */
95#endif /* _ASM_POWERPC_KPROBES_H */
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef _ASM_POWERPC_KPROBES_H
3#define _ASM_POWERPC_KPROBES_H
4
5#include <asm-generic/kprobes.h>
6
7#ifdef __KERNEL__
8/*
9 * Kernel Probes (KProbes)
10 *
11 * Copyright (C) IBM Corporation, 2002, 2004
12 *
13 * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
14 * Probes initial implementation ( includes suggestions from
15 * Rusty Russell).
16 * 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli
17 * <ananth@in.ibm.com>
18 */
19#include <linux/types.h>
20#include <linux/ptrace.h>
21#include <linux/percpu.h>
22#include <linux/module.h>
23#include <asm/probes.h>
24#include <asm/code-patching.h>
25
26#ifdef CONFIG_KPROBES
27#define __ARCH_WANT_KPROBES_INSN_SLOT
28
29struct pt_regs;
30struct kprobe;
31
32typedef u32 kprobe_opcode_t;
33
34extern kprobe_opcode_t optinsn_slot;
35
36/* Optinsn template address */
37extern kprobe_opcode_t optprobe_template_entry[];
38extern kprobe_opcode_t optprobe_template_op_address[];
39extern kprobe_opcode_t optprobe_template_call_handler[];
40extern kprobe_opcode_t optprobe_template_insn[];
41extern kprobe_opcode_t optprobe_template_call_emulate[];
42extern kprobe_opcode_t optprobe_template_ret[];
43extern kprobe_opcode_t optprobe_template_end[];
44
45/* Fixed instruction size for powerpc */
46#define MAX_INSN_SIZE 2
47#define MAX_OPTIMIZED_LENGTH sizeof(kprobe_opcode_t) /* 4 bytes */
48#define MAX_OPTINSN_SIZE (optprobe_template_end - optprobe_template_entry)
49#define RELATIVEJUMP_SIZE sizeof(kprobe_opcode_t) /* 4 bytes */
50
51#define flush_insn_slot(p) do { } while (0)
52#define kretprobe_blacklist_size 0
53
54void __kretprobe_trampoline(void);
55extern void arch_remove_kprobe(struct kprobe *p);
56
57/* Architecture specific copy of original instruction */
58struct arch_specific_insn {
59 /* copy of original instruction */
60 kprobe_opcode_t *insn;
61 /*
62 * Set in kprobes code, initially to 0. If the instruction can be
63 * eumulated, this is set to 1, if not, to -1.
64 */
65 int boostable;
66};
67
68struct prev_kprobe {
69 struct kprobe *kp;
70 unsigned long status;
71 unsigned long saved_msr;
72};
73
74/* per-cpu kprobe control block */
75struct kprobe_ctlblk {
76 unsigned long kprobe_status;
77 unsigned long kprobe_saved_msr;
78 struct prev_kprobe prev_kprobe;
79};
80
81struct arch_optimized_insn {
82 kprobe_opcode_t copied_insn[1];
83 /* detour buffer */
84 kprobe_opcode_t *insn;
85};
86
87extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
88extern int kprobe_handler(struct pt_regs *regs);
89extern int kprobe_post_handler(struct pt_regs *regs);
90#else
91static inline int kprobe_handler(struct pt_regs *regs) { return 0; }
92static inline int kprobe_post_handler(struct pt_regs *regs) { return 0; }
93#endif /* CONFIG_KPROBES */
94#endif /* __KERNEL__ */
95#endif /* _ASM_POWERPC_KPROBES_H */