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97 lines
2.7 KiB
97 lines
2.7 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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#ifndef _ASM_POWERPC_KPROBES_H |
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#define _ASM_POWERPC_KPROBES_H |
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#include <asm-generic/kprobes.h> |
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#ifdef __KERNEL__ |
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/* |
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* Kernel Probes (KProbes) |
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* |
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* Copyright (C) IBM Corporation, 2002, 2004 |
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* |
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* 2002-Oct Created by Vamsi Krishna S <[email protected]> Kernel |
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* Probes initial implementation ( includes suggestions from |
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* Rusty Russell). |
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* 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli |
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* <[email protected]> |
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*/ |
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#include <linux/types.h> |
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#include <linux/ptrace.h> |
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#include <linux/percpu.h> |
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#include <linux/module.h> |
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#include <asm/probes.h> |
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#include <asm/code-patching.h> |
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#ifdef CONFIG_KPROBES |
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#define __ARCH_WANT_KPROBES_INSN_SLOT |
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struct pt_regs; |
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struct kprobe; |
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typedef ppc_opcode_t kprobe_opcode_t; |
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extern kprobe_opcode_t optinsn_slot; |
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/* Optinsn template address */ |
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extern kprobe_opcode_t optprobe_template_entry[]; |
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extern kprobe_opcode_t optprobe_template_op_address[]; |
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extern kprobe_opcode_t optprobe_template_call_handler[]; |
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extern kprobe_opcode_t optprobe_template_insn[]; |
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extern kprobe_opcode_t optprobe_template_call_emulate[]; |
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extern kprobe_opcode_t optprobe_template_ret[]; |
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extern kprobe_opcode_t optprobe_template_end[]; |
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/* Fixed instruction size for powerpc */ |
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#define MAX_INSN_SIZE 2 |
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#define MAX_OPTIMIZED_LENGTH sizeof(kprobe_opcode_t) /* 4 bytes */ |
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#define MAX_OPTINSN_SIZE (optprobe_template_end - optprobe_template_entry) |
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#define RELATIVEJUMP_SIZE sizeof(kprobe_opcode_t) /* 4 bytes */ |
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#define flush_insn_slot(p) do { } while (0) |
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#define kretprobe_blacklist_size 0 |
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void kretprobe_trampoline(void); |
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extern void arch_remove_kprobe(struct kprobe *p); |
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/* Architecture specific copy of original instruction */ |
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struct arch_specific_insn { |
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/* copy of original instruction */ |
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kprobe_opcode_t *insn; |
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/* |
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* Set in kprobes code, initially to 0. If the instruction can be |
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* eumulated, this is set to 1, if not, to -1. |
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*/ |
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int boostable; |
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}; |
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struct prev_kprobe { |
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struct kprobe *kp; |
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unsigned long status; |
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unsigned long saved_msr; |
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}; |
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/* per-cpu kprobe control block */ |
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struct kprobe_ctlblk { |
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unsigned long kprobe_status; |
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unsigned long kprobe_saved_msr; |
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struct prev_kprobe prev_kprobe; |
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}; |
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struct arch_optimized_insn { |
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kprobe_opcode_t copied_insn[1]; |
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/* detour buffer */ |
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kprobe_opcode_t *insn; |
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}; |
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extern int kprobe_exceptions_notify(struct notifier_block *self, |
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unsigned long val, void *data); |
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extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr); |
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extern int kprobe_handler(struct pt_regs *regs); |
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extern int kprobe_post_handler(struct pt_regs *regs); |
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#else |
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static inline int kprobe_handler(struct pt_regs *regs) { return 0; } |
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static inline int kprobe_post_handler(struct pt_regs *regs) { return 0; } |
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#endif /* CONFIG_KPROBES */ |
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#endif /* __KERNEL__ */ |
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#endif /* _ASM_POWERPC_KPROBES_H */
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