mirror of
https://github.com/torvalds/linux.git
synced 2024-12-04 18:13:04 +00:00
d4940b84da
All uses of arch_kprobe_override_function() have been removed by
commit 540adea380 ("error-injection: Separate error-injection
from kprobe"), so remove the declaration, too.
Link: https://lkml.kernel.org/r/20220914110437.1436353-3-cuigaosheng1@huawei.com
Cc: <mingo@redhat.com>
Cc: <tglx@linutronix.de>
Cc: <bp@alien8.de>
Cc: <dave.hansen@linux.intel.com>
Cc: <x86@kernel.org>
Cc: <hpa@zytor.com>
Cc: <mhiramat@kernel.org>
Cc: <peterz@infradead.org>
Cc: <ast@kernel.org>
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
126 lines
3.3 KiB
C
126 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
#ifndef _ASM_X86_KPROBES_H
|
|
#define _ASM_X86_KPROBES_H
|
|
/*
|
|
* Kernel Probes (KProbes)
|
|
*
|
|
* Copyright (C) IBM Corporation, 2002, 2004
|
|
*
|
|
* See arch/x86/kernel/kprobes.c for x86 kprobes history.
|
|
*/
|
|
|
|
#include <asm-generic/kprobes.h>
|
|
|
|
#ifdef CONFIG_KPROBES
|
|
#include <linux/types.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/percpu.h>
|
|
#include <asm/text-patching.h>
|
|
#include <asm/insn.h>
|
|
|
|
#define __ARCH_WANT_KPROBES_INSN_SLOT
|
|
|
|
struct pt_regs;
|
|
struct kprobe;
|
|
|
|
typedef u8 kprobe_opcode_t;
|
|
|
|
#define MAX_STACK_SIZE 64
|
|
#define CUR_STACK_SIZE(ADDR) \
|
|
(current_top_of_stack() - (unsigned long)(ADDR))
|
|
#define MIN_STACK_SIZE(ADDR) \
|
|
(MAX_STACK_SIZE < CUR_STACK_SIZE(ADDR) ? \
|
|
MAX_STACK_SIZE : CUR_STACK_SIZE(ADDR))
|
|
|
|
#define flush_insn_slot(p) do { } while (0)
|
|
|
|
/* optinsn template addresses */
|
|
extern __visible kprobe_opcode_t optprobe_template_entry[];
|
|
extern __visible kprobe_opcode_t optprobe_template_clac[];
|
|
extern __visible kprobe_opcode_t optprobe_template_val[];
|
|
extern __visible kprobe_opcode_t optprobe_template_call[];
|
|
extern __visible kprobe_opcode_t optprobe_template_end[];
|
|
#define MAX_OPTIMIZED_LENGTH (MAX_INSN_SIZE + DISP32_SIZE)
|
|
#define MAX_OPTINSN_SIZE \
|
|
(((unsigned long)optprobe_template_end - \
|
|
(unsigned long)optprobe_template_entry) + \
|
|
MAX_OPTIMIZED_LENGTH + JMP32_INSN_SIZE)
|
|
|
|
extern const int kretprobe_blacklist_size;
|
|
|
|
void arch_remove_kprobe(struct kprobe *p);
|
|
|
|
/* Architecture specific copy of original instruction*/
|
|
struct arch_specific_insn {
|
|
/* copy of the original instruction */
|
|
kprobe_opcode_t *insn;
|
|
/*
|
|
* boostable = 0: This instruction type is not boostable.
|
|
* boostable = 1: This instruction has been boosted: we have
|
|
* added a relative jump after the instruction copy in insn,
|
|
* so no single-step and fixup are needed (unless there's
|
|
* a post_handler).
|
|
*/
|
|
unsigned boostable:1;
|
|
unsigned char size; /* The size of insn */
|
|
union {
|
|
unsigned char opcode;
|
|
struct {
|
|
unsigned char type;
|
|
} jcc;
|
|
struct {
|
|
unsigned char type;
|
|
unsigned char asize;
|
|
} loop;
|
|
struct {
|
|
unsigned char reg;
|
|
} indirect;
|
|
};
|
|
s32 rel32; /* relative offset must be s32, s16, or s8 */
|
|
void (*emulate_op)(struct kprobe *p, struct pt_regs *regs);
|
|
/* Number of bytes of text poked */
|
|
int tp_len;
|
|
};
|
|
|
|
struct arch_optimized_insn {
|
|
/* copy of the original instructions */
|
|
kprobe_opcode_t copied_insn[DISP32_SIZE];
|
|
/* detour code buffer */
|
|
kprobe_opcode_t *insn;
|
|
/* the size of instructions copied to detour code buffer */
|
|
size_t size;
|
|
};
|
|
|
|
/* Return true (!0) if optinsn is prepared for optimization. */
|
|
static inline int arch_prepared_optinsn(struct arch_optimized_insn *optinsn)
|
|
{
|
|
return optinsn->size;
|
|
}
|
|
|
|
struct prev_kprobe {
|
|
struct kprobe *kp;
|
|
unsigned long status;
|
|
unsigned long old_flags;
|
|
unsigned long saved_flags;
|
|
};
|
|
|
|
/* per-cpu kprobe control block */
|
|
struct kprobe_ctlblk {
|
|
unsigned long kprobe_status;
|
|
unsigned long kprobe_old_flags;
|
|
unsigned long kprobe_saved_flags;
|
|
struct prev_kprobe prev_kprobe;
|
|
};
|
|
|
|
extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
|
|
extern int kprobe_exceptions_notify(struct notifier_block *self,
|
|
unsigned long val, void *data);
|
|
extern int kprobe_int3_handler(struct pt_regs *regs);
|
|
|
|
#else
|
|
|
|
static inline int kprobe_debug_handler(struct pt_regs *regs) { return 0; }
|
|
|
|
#endif /* CONFIG_KPROBES */
|
|
#endif /* _ASM_X86_KPROBES_H */
|