From ea08eeccae9297f7aabd2ef7f0c2517ac4549acc Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:18:26 +0000
Subject: [PATCH] write in 30M
---
kernel/arch/x86/include/asm/kprobes.h | 60 ++++++++++++++++++++++++++++++++----------------------------
1 files changed, 32 insertions(+), 28 deletions(-)
diff --git a/kernel/arch/x86/include/asm/kprobes.h b/kernel/arch/x86/include/asm/kprobes.h
index c8cec1b..bd7f588 100644
--- a/kernel/arch/x86/include/asm/kprobes.h
+++ b/kernel/arch/x86/include/asm/kprobes.h
@@ -1,21 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _ASM_X86_KPROBES_H
#define _ASM_X86_KPROBES_H
/*
* Kernel Probes (KProbes)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) IBM Corporation, 2002, 2004
*
@@ -24,12 +11,11 @@
#include <asm-generic/kprobes.h>
-#define BREAKPOINT_INSTRUCTION 0xcc
-
#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
@@ -38,10 +24,7 @@
struct kprobe;
typedef u8 kprobe_opcode_t;
-#define RELATIVEJUMP_OPCODE 0xe9
-#define RELATIVEJUMP_SIZE 5
-#define RELATIVECALL_OPCODE 0xe8
-#define RELATIVE_ADDR_SIZE 4
+
#define MAX_STACK_SIZE 64
#define CUR_STACK_SIZE(ADDR) \
(current_top_of_stack() - (unsigned long)(ADDR))
@@ -53,14 +36,15 @@
/* 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 + RELATIVE_ADDR_SIZE)
+#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 + RELATIVEJUMP_SIZE)
+ MAX_OPTIMIZED_LENGTH + JMP32_INSN_SIZE)
extern const int kretprobe_blacklist_size;
@@ -74,19 +58,36 @@
/* copy of the original instruction */
kprobe_opcode_t *insn;
/*
- * boostable = false: This instruction type is not boostable.
- * boostable = true: This instruction has been boosted: we have
+ * 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).
*/
- bool boostable;
- bool if_modifier;
+ 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[RELATIVE_ADDR_SIZE];
+ kprobe_opcode_t copied_insn[DISP32_SIZE];
/* detour code buffer */
kprobe_opcode_t *insn;
/* the size of instructions copied to detour code buffer */
@@ -118,7 +119,10 @@
extern int kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data);
extern int kprobe_int3_handler(struct pt_regs *regs);
-extern int kprobe_debug_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 */
--
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