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asm
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kprobes.h

kprobes.h 2.2 KB
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  1. /* SPDX-License-Identifier: GPL-2.0-only */
    2. 

  2. /*
    3. 

  3.  * arch/arm/include/asm/kprobes.h
    4. 

  4.  *
    5. 

  5.  * Copyright (C) 2006, 2007 Motorola Inc.
    6. 

  6.  */
    7. 

  7. 

  8. #ifndef _ARM_KPROBES_H
    9. 

  9. #define _ARM_KPROBES_H
    10. 

  10. 

  11. #include <asm-generic/kprobes.h>
    12. 

  12. 

  13. #ifdef CONFIG_KPROBES
    14. 

  14. #include <linux/types.h>
    15. 

  15. #include <linux/ptrace.h>
    16. 

  16. #include <linux/notifier.h>
    17. 

  17. 

  18. #define __ARCH_WANT_KPROBES_INSN_SLOT
    19. 

  19. #define MAX_INSN_SIZE			2
    20. 

  20. 

  21. #define flush_insn_slot(p)		do { } while (0)
    22. 

  22. #define kretprobe_blacklist_size	0
    23. 

  23. 

  24. typedef u32 kprobe_opcode_t;
    25. 

  25. struct kprobe;
    26. 

  26. #include <asm/probes.h>
    27. 

  27. 

  28. #define	arch_specific_insn	arch_probes_insn
    29. 

  29. 

  30. struct prev_kprobe {
    31. 

  31. 	struct kprobe *kp;
    32. 

  32. 	unsigned int status;
    33. 

  33. };
    34. 

  34. 

  35. /* per-cpu kprobe control block */
    36. 

  36. struct kprobe_ctlblk {
    37. 

  37. 	unsigned int kprobe_status;
    38. 

  38. 	struct prev_kprobe prev_kprobe;
    39. 

  39. };
    40. 

  40. 

  41. void arch_remove_kprobe(struct kprobe *);
    42. 

  42. int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr);
    43. 

  43. int kprobe_exceptions_notify(struct notifier_block *self,
    44. 

  44. 			     unsigned long val, void *data);
    45. 

  45. 

  46. /* optinsn template addresses */
    47. 

  47. extern __visible kprobe_opcode_t optprobe_template_entry[];
    48. 

  48. extern __visible kprobe_opcode_t optprobe_template_val[];
    49. 

  49. extern __visible kprobe_opcode_t optprobe_template_call[];
    50. 

  50. extern __visible kprobe_opcode_t optprobe_template_end[];
    51. 

  51. extern __visible kprobe_opcode_t optprobe_template_sub_sp[];
    52. 

  52. extern __visible kprobe_opcode_t optprobe_template_add_sp[];
    53. 

  53. extern __visible kprobe_opcode_t optprobe_template_restore_begin[];
    54. 

  54. extern __visible kprobe_opcode_t optprobe_template_restore_orig_insn[];
    55. 

  55. extern __visible kprobe_opcode_t optprobe_template_restore_end[];
    56. 

  56. 

  57. #define MAX_OPTIMIZED_LENGTH	4
    58. 

  58. #define MAX_OPTINSN_SIZE				\
    59. 

  59. 	((unsigned long)optprobe_template_end -	\
    60. 

  60. 	 (unsigned long)optprobe_template_entry)
    61. 

  61. #define RELATIVEJUMP_SIZE	4
    62. 

  62. 

  63. struct arch_optimized_insn {
    64. 

  64. 	/*
    65. 

  65. 	 * copy of the original instructions.
    66. 

  66. 	 * Different from x86, ARM kprobe_opcode_t is u32.
    67. 

  67. 	 */
    68. 

  68. #define MAX_COPIED_INSN	DIV_ROUND_UP(RELATIVEJUMP_SIZE, sizeof(kprobe_opcode_t))
    69. 

  69. 	kprobe_opcode_t copied_insn[MAX_COPIED_INSN];
    70. 

  70. 	/* detour code buffer */
    71. 

  71. 	kprobe_opcode_t *insn;
    72. 

  72. 	/*
    73. 

  73. 	 * We always copy one instruction on ARM,
    74. 

  74. 	 * so size will always be 4, and unlike x86, there is no
    75. 

  75. 	 * need for a size field.
    76. 

  76. 	 */
    77. 

  77. };
    78. 

  78. 

  79. #endif /* CONFIG_KPROBES */
    80. 

  80. #endif /* _ARM_KPROBES_H */
    81.