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| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
|---|---|
| 2 | /* |
| 3 | * arch/arm/include/asm/probes.h |
| 4 | * |
| 5 | * Original contents copied from arch/arm/include/asm/kprobes.h |
| 6 | * which contains the following notice... |
| 7 | * |
| 8 | * Copyright (C) 2006, 2007 Motorola Inc. |
| 9 | */ |
| 10 | |
| 11 | #ifndef _ASM_PROBES_H |
| 12 | #define _ASM_PROBES_H |
| 13 | |
| 14 | #ifndef __ASSEMBLY__ |
| 15 | |
| 16 | typedef u32 probes_opcode_t; |
| 17 | |
| 18 | struct arch_probes_insn; |
| 19 | typedef void (probes_insn_handler_t)(probes_opcode_t, |
| 20 | struct arch_probes_insn *, |
| 21 | struct pt_regs *); |
| 22 | typedef unsigned long (probes_check_cc)(unsigned long); |
| 23 | typedef void (probes_insn_singlestep_t)(probes_opcode_t, |
| 24 | struct arch_probes_insn *, |
| 25 | struct pt_regs *); |
| 26 | typedef void (probes_insn_fn_t)(void); |
| 27 | |
| 28 | /* Architecture specific copy of original instruction. */ |
| 29 | struct arch_probes_insn { |
| 30 | probes_opcode_t *insn; |
| 31 | probes_insn_handler_t *insn_handler; |
| 32 | probes_check_cc *insn_check_cc; |
| 33 | probes_insn_singlestep_t *insn_singlestep; |
| 34 | probes_insn_fn_t *insn_fn; |
| 35 | int stack_space; |
| 36 | unsigned long register_usage_flags; |
| 37 | bool kprobe_direct_exec; |
| 38 | }; |
| 39 | |
| 40 | #endif /* __ASSEMBLY__ */ |
| 41 | |
| 42 | /* |
| 43 | * We assume one instruction can consume at most 64 bytes stack, which is |
| 44 | * 'push {r0-r15}'. Instructions consume more or unknown stack space like |
| 45 | * 'str r0, [sp, #-80]' and 'str r0, [sp, r1]' should be prohibit to probe. |
| 46 | */ |
| 47 | #define MAX_STACK_SIZE 64 |
| 48 | |
| 49 | #endif |
| 50 |
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