11802d0beSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 24baa9922SRussell King /* 34baa9922SRussell King * arch/arm/include/asm/kprobes.h 44baa9922SRussell King * 54baa9922SRussell King * Copyright (C) 2006, 2007 Motorola Inc. 64baa9922SRussell King */ 74baa9922SRussell King 84baa9922SRussell King #ifndef _ARM_KPROBES_H 94baa9922SRussell King #define _ARM_KPROBES_H 104baa9922SRussell King 117d134b2cSLuis R. Rodriguez #include <asm-generic/kprobes.h> 127d134b2cSLuis R. Rodriguez 137d134b2cSLuis R. Rodriguez #ifdef CONFIG_KPROBES 144baa9922SRussell King #include <linux/types.h> 154baa9922SRussell King #include <linux/ptrace.h> 1621254ebcSDavid A. Long #include <linux/notifier.h> 174baa9922SRussell King 184baa9922SRussell King #define __ARCH_WANT_KPROBES_INSN_SLOT 194baa9922SRussell King #define MAX_INSN_SIZE 2 204baa9922SRussell King 214baa9922SRussell King #define flush_insn_slot(p) do { } while (0) 224baa9922SRussell King #define kretprobe_blacklist_size 0 234baa9922SRussell King 244baa9922SRussell King typedef u32 kprobe_opcode_t; 254baa9922SRussell King struct kprobe; 26b2531dd5SDavid A. Long #include <asm/probes.h> 274baa9922SRussell King 28b4cd605cSDavid A. Long #define arch_specific_insn arch_probes_insn 29b4cd605cSDavid A. Long 304baa9922SRussell King struct prev_kprobe { 314baa9922SRussell King struct kprobe *kp; 324baa9922SRussell King unsigned int status; 334baa9922SRussell King }; 344baa9922SRussell King 354baa9922SRussell King /* per-cpu kprobe control block */ 364baa9922SRussell King struct kprobe_ctlblk { 374baa9922SRussell King unsigned int kprobe_status; 384baa9922SRussell King struct prev_kprobe prev_kprobe; 394baa9922SRussell King }; 404baa9922SRussell King 414baa9922SRussell King void arch_remove_kprobe(struct kprobe *); 424baa9922SRussell King int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr); 434baa9922SRussell King int kprobe_exceptions_notify(struct notifier_block *self, 444baa9922SRussell King unsigned long val, void *data); 454baa9922SRussell King 460dc016dbSWang Nan /* optinsn template addresses */ 47*9fa2e7afSAndrew Jeffery extern __visible kprobe_opcode_t optprobe_template_entry[]; 48*9fa2e7afSAndrew Jeffery extern __visible kprobe_opcode_t optprobe_template_val[]; 49*9fa2e7afSAndrew Jeffery extern __visible kprobe_opcode_t optprobe_template_call[]; 50*9fa2e7afSAndrew Jeffery extern __visible kprobe_opcode_t optprobe_template_end[]; 51*9fa2e7afSAndrew Jeffery extern __visible kprobe_opcode_t optprobe_template_sub_sp[]; 52*9fa2e7afSAndrew Jeffery extern __visible kprobe_opcode_t optprobe_template_add_sp[]; 53*9fa2e7afSAndrew Jeffery extern __visible kprobe_opcode_t optprobe_template_restore_begin[]; 54*9fa2e7afSAndrew Jeffery extern __visible kprobe_opcode_t optprobe_template_restore_orig_insn[]; 55*9fa2e7afSAndrew Jeffery extern __visible kprobe_opcode_t optprobe_template_restore_end[]; 560dc016dbSWang Nan 570dc016dbSWang Nan #define MAX_OPTIMIZED_LENGTH 4 580dc016dbSWang Nan #define MAX_OPTINSN_SIZE \ 59*9fa2e7afSAndrew Jeffery ((unsigned long)optprobe_template_end - \ 60*9fa2e7afSAndrew Jeffery (unsigned long)optprobe_template_entry) 610dc016dbSWang Nan #define RELATIVEJUMP_SIZE 4 620dc016dbSWang Nan 630dc016dbSWang Nan struct arch_optimized_insn { 640dc016dbSWang Nan /* 650dc016dbSWang Nan * copy of the original instructions. 660dc016dbSWang Nan * Different from x86, ARM kprobe_opcode_t is u32. 670dc016dbSWang Nan */ 680dc016dbSWang Nan #define MAX_COPIED_INSN DIV_ROUND_UP(RELATIVEJUMP_SIZE, sizeof(kprobe_opcode_t)) 690dc016dbSWang Nan kprobe_opcode_t copied_insn[MAX_COPIED_INSN]; 700dc016dbSWang Nan /* detour code buffer */ 710dc016dbSWang Nan kprobe_opcode_t *insn; 720dc016dbSWang Nan /* 730dc016dbSWang Nan * We always copy one instruction on ARM, 740dc016dbSWang Nan * so size will always be 4, and unlike x86, there is no 750dc016dbSWang Nan * need for a size field. 760dc016dbSWang Nan */ 770dc016dbSWang Nan }; 784baa9922SRussell King 797d134b2cSLuis R. Rodriguez #endif /* CONFIG_KPROBES */ 804baa9922SRussell King #endif /* _ARM_KPROBES_H */ 81