1 /* 2 * arch/arm/include/asm/probes.h 3 * 4 * Original contents copied from arch/arm/include/asm/kprobes.h 5 * which contains the following notice... 6 * 7 * Copyright (C) 2006, 2007 Motorola Inc. 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * General Public License for more details. 17 */ 18 19 #ifndef _ASM_PROBES_H 20 #define _ASM_PROBES_H 21 22 #ifndef __ASSEMBLY__ 23 24 typedef u32 probes_opcode_t; 25 26 struct arch_probes_insn; 27 typedef void (probes_insn_handler_t)(probes_opcode_t, 28 struct arch_probes_insn *, 29 struct pt_regs *); 30 typedef unsigned long (probes_check_cc)(unsigned long); 31 typedef void (probes_insn_singlestep_t)(probes_opcode_t, 32 struct arch_probes_insn *, 33 struct pt_regs *); 34 typedef void (probes_insn_fn_t)(void); 35 36 /* Architecture specific copy of original instruction. */ 37 struct arch_probes_insn { 38 probes_opcode_t *insn; 39 probes_insn_handler_t *insn_handler; 40 probes_check_cc *insn_check_cc; 41 probes_insn_singlestep_t *insn_singlestep; 42 probes_insn_fn_t *insn_fn; 43 int stack_space; 44 unsigned long register_usage_flags; 45 bool kprobe_direct_exec; 46 }; 47 48 #endif /* __ASSEMBLY__ */ 49 50 /* 51 * We assume one instruction can consume at most 64 bytes stack, which is 52 * 'push {r0-r15}'. Instructions consume more or unknown stack space like 53 * 'str r0, [sp, #-80]' and 'str r0, [sp, r1]' should be prohibit to probe. 54 */ 55 #define MAX_STACK_SIZE 64 56 57 #endif 58