1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * arch/arm/include/asm/kprobes.h 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 2006, 2007 Motorola Inc. 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #ifndef _ARM_KPROBES_H 9*4882a593Smuzhiyun #define _ARM_KPROBES_H 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include <asm-generic/kprobes.h> 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #ifdef CONFIG_KPROBES 14*4882a593Smuzhiyun #include <linux/types.h> 15*4882a593Smuzhiyun #include <linux/ptrace.h> 16*4882a593Smuzhiyun #include <linux/notifier.h> 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun #define __ARCH_WANT_KPROBES_INSN_SLOT 19*4882a593Smuzhiyun #define MAX_INSN_SIZE 2 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun #define flush_insn_slot(p) do { } while (0) 22*4882a593Smuzhiyun #define kretprobe_blacklist_size 0 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun typedef u32 kprobe_opcode_t; 25*4882a593Smuzhiyun struct kprobe; 26*4882a593Smuzhiyun #include <asm/probes.h> 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun #define arch_specific_insn arch_probes_insn 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun struct prev_kprobe { 31*4882a593Smuzhiyun struct kprobe *kp; 32*4882a593Smuzhiyun unsigned int status; 33*4882a593Smuzhiyun }; 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun /* per-cpu kprobe control block */ 36*4882a593Smuzhiyun struct kprobe_ctlblk { 37*4882a593Smuzhiyun unsigned int kprobe_status; 38*4882a593Smuzhiyun struct prev_kprobe prev_kprobe; 39*4882a593Smuzhiyun }; 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun void arch_remove_kprobe(struct kprobe *); 42*4882a593Smuzhiyun int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr); 43*4882a593Smuzhiyun int kprobe_exceptions_notify(struct notifier_block *self, 44*4882a593Smuzhiyun unsigned long val, void *data); 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun /* optinsn template addresses */ 47*4882a593Smuzhiyun extern __visible kprobe_opcode_t optprobe_template_entry[]; 48*4882a593Smuzhiyun extern __visible kprobe_opcode_t optprobe_template_val[]; 49*4882a593Smuzhiyun extern __visible kprobe_opcode_t optprobe_template_call[]; 50*4882a593Smuzhiyun extern __visible kprobe_opcode_t optprobe_template_end[]; 51*4882a593Smuzhiyun extern __visible kprobe_opcode_t optprobe_template_sub_sp[]; 52*4882a593Smuzhiyun extern __visible kprobe_opcode_t optprobe_template_add_sp[]; 53*4882a593Smuzhiyun extern __visible kprobe_opcode_t optprobe_template_restore_begin[]; 54*4882a593Smuzhiyun extern __visible kprobe_opcode_t optprobe_template_restore_orig_insn[]; 55*4882a593Smuzhiyun extern __visible kprobe_opcode_t optprobe_template_restore_end[]; 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun #define MAX_OPTIMIZED_LENGTH 4 58*4882a593Smuzhiyun #define MAX_OPTINSN_SIZE \ 59*4882a593Smuzhiyun ((unsigned long)optprobe_template_end - \ 60*4882a593Smuzhiyun (unsigned long)optprobe_template_entry) 61*4882a593Smuzhiyun #define RELATIVEJUMP_SIZE 4 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun struct arch_optimized_insn { 64*4882a593Smuzhiyun /* 65*4882a593Smuzhiyun * copy of the original instructions. 66*4882a593Smuzhiyun * Different from x86, ARM kprobe_opcode_t is u32. 67*4882a593Smuzhiyun */ 68*4882a593Smuzhiyun #define MAX_COPIED_INSN DIV_ROUND_UP(RELATIVEJUMP_SIZE, sizeof(kprobe_opcode_t)) 69*4882a593Smuzhiyun kprobe_opcode_t copied_insn[MAX_COPIED_INSN]; 70*4882a593Smuzhiyun /* detour code buffer */ 71*4882a593Smuzhiyun kprobe_opcode_t *insn; 72*4882a593Smuzhiyun /* 73*4882a593Smuzhiyun * We always copy one instruction on ARM, 74*4882a593Smuzhiyun * so size will always be 4, and unlike x86, there is no 75*4882a593Smuzhiyun * need for a size field. 76*4882a593Smuzhiyun */ 77*4882a593Smuzhiyun }; 78*4882a593Smuzhiyun 79*4882a593Smuzhiyun #endif /* CONFIG_KPROBES */ 80*4882a593Smuzhiyun #endif /* _ARM_KPROBES_H */ 81