abc28463c8
Most architectures that support kprobes declare this function in their own asm/kprobes.h header and provide an override, but some are missing the prototype, which causes a warning for the __weak stub implementation: kernel/kprobes.c:1865:12: error: no previous prototype for 'kprobe_exceptions_notify' [-Werror=missing-prototypes] 1865 | int __weak kprobe_exceptions_notify(struct notifier_block *self, Move the prototype into linux/kprobes.h so it is visible to all the definitions. Link: https://lore.kernel.org/all/20231108125843.3806765-4-arnd@kernel.org/ Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
#ifndef _ASM_POWERPC_KPROBES_H
|
|
#define _ASM_POWERPC_KPROBES_H
|
|
|
|
#include <asm-generic/kprobes.h>
|
|
|
|
#ifdef __KERNEL__
|
|
/*
|
|
* Kernel Probes (KProbes)
|
|
*
|
|
* Copyright (C) IBM Corporation, 2002, 2004
|
|
*
|
|
* 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
|
|
* Probes initial implementation ( includes suggestions from
|
|
* Rusty Russell).
|
|
* 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli
|
|
* <ananth@in.ibm.com>
|
|
*/
|
|
#include <linux/types.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/percpu.h>
|
|
#include <linux/module.h>
|
|
#include <asm/probes.h>
|
|
#include <asm/code-patching.h>
|
|
|
|
#ifdef CONFIG_KPROBES
|
|
#define __ARCH_WANT_KPROBES_INSN_SLOT
|
|
|
|
struct pt_regs;
|
|
struct kprobe;
|
|
|
|
typedef u32 kprobe_opcode_t;
|
|
|
|
extern kprobe_opcode_t optinsn_slot;
|
|
|
|
/* Optinsn template address */
|
|
extern kprobe_opcode_t optprobe_template_entry[];
|
|
extern kprobe_opcode_t optprobe_template_op_address[];
|
|
extern kprobe_opcode_t optprobe_template_call_handler[];
|
|
extern kprobe_opcode_t optprobe_template_insn[];
|
|
extern kprobe_opcode_t optprobe_template_call_emulate[];
|
|
extern kprobe_opcode_t optprobe_template_ret[];
|
|
extern kprobe_opcode_t optprobe_template_end[];
|
|
|
|
/* Fixed instruction size for powerpc */
|
|
#define MAX_INSN_SIZE 2
|
|
#define MAX_OPTIMIZED_LENGTH sizeof(kprobe_opcode_t) /* 4 bytes */
|
|
#define MAX_OPTINSN_SIZE (optprobe_template_end - optprobe_template_entry)
|
|
#define RELATIVEJUMP_SIZE sizeof(kprobe_opcode_t) /* 4 bytes */
|
|
|
|
#define flush_insn_slot(p) do { } while (0)
|
|
#define kretprobe_blacklist_size 0
|
|
|
|
void __kretprobe_trampoline(void);
|
|
extern void arch_remove_kprobe(struct kprobe *p);
|
|
|
|
/* Architecture specific copy of original instruction */
|
|
struct arch_specific_insn {
|
|
/* copy of original instruction */
|
|
kprobe_opcode_t *insn;
|
|
/*
|
|
* Set in kprobes code, initially to 0. If the instruction can be
|
|
* eumulated, this is set to 1, if not, to -1.
|
|
*/
|
|
int boostable;
|
|
};
|
|
|
|
struct prev_kprobe {
|
|
struct kprobe *kp;
|
|
unsigned long status;
|
|
unsigned long saved_msr;
|
|
};
|
|
|
|
/* per-cpu kprobe control block */
|
|
struct kprobe_ctlblk {
|
|
unsigned long kprobe_status;
|
|
unsigned long kprobe_saved_msr;
|
|
struct prev_kprobe prev_kprobe;
|
|
};
|
|
|
|
struct arch_optimized_insn {
|
|
kprobe_opcode_t copied_insn[1];
|
|
/* detour buffer */
|
|
kprobe_opcode_t *insn;
|
|
};
|
|
|
|
extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
|
|
extern int kprobe_handler(struct pt_regs *regs);
|
|
extern int kprobe_post_handler(struct pt_regs *regs);
|
|
#else
|
|
static inline int kprobe_handler(struct pt_regs *regs) { return 0; }
|
|
static inline int kprobe_post_handler(struct pt_regs *regs) { return 0; }
|
|
#endif /* CONFIG_KPROBES */
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_POWERPC_KPROBES_H */
|