projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1a59d1b8 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| bbeb3f4c SR |
2 | #ifndef _ASM_POWERPC_KPROBES_H |
| 3 | #define _ASM_POWERPC_KPROBES_H | |
| 7d134b2c LR |
4 | |
| 5 | #include <asm-generic/kprobes.h> | |
| 6 | ||
| 88ced031 | 7 | #ifdef __KERNEL__ |
| 14cf11af PM |
8 | /* |
| 9 | * Kernel Probes (KProbes) | |
| 14cf11af | 10 | * |
| 14cf11af PM |
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> | |
| 0dc036c9 | 21 | #include <linux/percpu.h> |
| 30176466 | 22 | #include <linux/module.h> |
| 7118e7e6 | 23 | #include <asm/probes.h> |
| 47f86b4e | 24 | #include <asm/code-patching.h> |
| 14cf11af | 25 | |
| 6cc89bad | 26 | #ifdef CONFIG_KPROBES |
| 2d14e39d AK |
27 | #define __ARCH_WANT_KPROBES_INSN_SLOT |
| 28 | ||
| 14cf11af | 29 | struct pt_regs; |
| 0498b635 | 30 | struct kprobe; |
| 14cf11af | 31 | |
| 28e1e58f | 32 | typedef ppc_opcode_t kprobe_opcode_t; |
| 51c9c084 A |
33 | |
| 34 | extern kprobe_opcode_t optinsn_slot; | |
| 35 | ||
| 36 | /* Optinsn template address */ | |
| 37 | extern kprobe_opcode_t optprobe_template_entry[]; | |
| 38 | extern kprobe_opcode_t optprobe_template_op_address[]; | |
| 39 | extern kprobe_opcode_t optprobe_template_call_handler[]; | |
| 40 | extern kprobe_opcode_t optprobe_template_insn[]; | |
| 41 | extern kprobe_opcode_t optprobe_template_call_emulate[]; | |
| 42 | extern kprobe_opcode_t optprobe_template_ret[]; | |
| 43 | extern kprobe_opcode_t optprobe_template_end[]; | |
| 44 | ||
| 45 | /* Fixed instruction size for powerpc */ | |
| 46 | #define MAX_INSN_SIZE 1 | |
| 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 */ | |
| 14cf11af | 50 | |
| a9ad965e | 51 | #define flush_insn_slot(p) do { } while (0) |
| f438d914 | 52 | #define kretprobe_blacklist_size 0 |
| e6f47f97 | 53 | |
| 14cf11af | 54 | void kretprobe_trampoline(void); |
| 0498b635 | 55 | extern void arch_remove_kprobe(struct kprobe *p); |
| 14cf11af PM |
56 | |
| 57 | /* Architecture specific copy of original instruction */ | |
| 58 | struct arch_specific_insn { | |
| 59 | /* copy of original instruction */ | |
| 60 | kprobe_opcode_t *insn; | |
| e6349a95 AM |
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; | |
| 14cf11af PM |
66 | }; |
| 67 | ||
| 0dc036c9 AM |
68 | struct prev_kprobe { |
| 69 | struct kprobe *kp; | |
| 70 | unsigned long status; | |
| 71 | unsigned long saved_msr; | |
| 72 | }; | |
| 73 | ||
| 74 | /* per-cpu kprobe control block */ | |
| 75 | struct kprobe_ctlblk { | |
| 76 | unsigned long kprobe_status; | |
| 77 | unsigned long kprobe_saved_msr; | |
| 0dc036c9 AM |
78 | struct prev_kprobe prev_kprobe; |
| 79 | }; | |
| 80 | ||
| 51c9c084 A |
81 | struct arch_optimized_insn { |
| 82 | kprobe_opcode_t copied_insn[1]; | |
| 83 | /* detour buffer */ | |
| 84 | kprobe_opcode_t *insn; | |
| 85 | }; | |
| 86 | ||
| 14cf11af | 87 | extern int kprobe_exceptions_notify(struct notifier_block *self, |
| 41dead49 | 88 | unsigned long val, void *data); |
| 9f90b997 | 89 | extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr); |
| 6cc89bad NR |
90 | extern int kprobe_handler(struct pt_regs *regs); |
| 91 | extern int kprobe_post_handler(struct pt_regs *regs); | |
| 92 | #else | |
| 93 | static inline int kprobe_handler(struct pt_regs *regs) { return 0; } | |
| 94 | static inline int kprobe_post_handler(struct pt_regs *regs) { return 0; } | |
| 95 | #endif /* CONFIG_KPROBES */ | |
| 88ced031 | 96 | #endif /* __KERNEL__ */ |
| bbeb3f4c | 97 | #endif /* _ASM_POWERPC_KPROBES_H */ |