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android_kernel_...
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tools
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testing
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selftests
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arm64
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bti
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assembler.h

assembler.h 1.2 KB
Előzmények Nyers

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  1. /* SPDX-License-Identifier: GPL-2.0 */
    2. 

  2. /*
    3. 

  3.  * Copyright (C) 2019  Arm Limited
    4. 

  4.  * Original author: Dave Martin <[email protected]>
    5. 

  5.  */
    6. 

  6. 

  7. #ifndef ASSEMBLER_H
    8. 

  8. #define ASSEMBLER_H
    9. 

  9. 

  10. #define NT_GNU_PROPERTY_TYPE_0	5
    11. 

  11. #define GNU_PROPERTY_AARCH64_FEATURE_1_AND	0xc0000000
    12. 

  12. 

  13. /* Bits for GNU_PROPERTY_AARCH64_FEATURE_1_BTI */
    14. 

  14. #define GNU_PROPERTY_AARCH64_FEATURE_1_BTI	(1U << 0)
    15. 

  15. #define GNU_PROPERTY_AARCH64_FEATURE_1_PAC	(1U << 1)
    16. 

  16. 

  17. 

  18. .macro startfn name:req
    19. 

  19. 	.globl \name
    20. 

  20. \name:
    21. 

  21. 	.macro endfn
    22. 

  22. 		.size \name, . - \name
    23. 

  23. 		.type \name, @function
    24. 

  24. 		.purgem endfn
    25. 

  25. 	.endm
    26. 

  26. .endm
    27. 

  27. 

  28. .macro emit_aarch64_feature_1_and
    29. 

  29. 	.pushsection .note.gnu.property, "a"
    30. 

  30. 	.align	3
    31. 

  31. 	.long	2f - 1f
    32. 

  32. 	.long	6f - 3f
    33. 

  33. 	.long	NT_GNU_PROPERTY_TYPE_0
    34. 

  34. 1:	.string	"GNU"
    35. 

  35. 2:
    36. 

  36. 	.align	3
    37. 

  37. 3:	.long	GNU_PROPERTY_AARCH64_FEATURE_1_AND
    38. 

  38. 	.long	5f - 4f
    39. 

  39. 4:
    40. 

  40. #if BTI
    41. 

  41. 	.long	GNU_PROPERTY_AARCH64_FEATURE_1_PAC | \
    42. 

  42. 		GNU_PROPERTY_AARCH64_FEATURE_1_BTI
    43. 

  43. #else
    44. 

  44. 	.long	0
    45. 

  45. #endif
    46. 

  46. 5:
    47. 

  47. 	.align	3
    48. 

  48. 6:
    49. 

  49. 	.popsection
    50. 

  50. .endm
    51. 

  51. 

  52. .macro paciasp
    53. 

  53. 	hint	0x19
    54. 

  54. .endm
    55. 

  55. 

  56. .macro autiasp
    57. 

  57. 	hint	0x1d
    58. 

  58. .endm
    59. 

  59. 

  60. .macro __bti_
    61. 

  61. 	hint	0x20
    62. 

  62. .endm
    63. 

  63. 

  64. .macro __bti_c
    65. 

  65. 	hint	0x22
    66. 

  66. .endm
    67. 

  67. 

  68. .macro __bti_j
    69. 

  69. 	hint	0x24
    70. 

  70. .endm
    71. 

  71. 

  72. .macro __bti_jc
    73. 

  73. 	hint	0x26
    74. 

  74. .endm
    75. 

  75. 

  76. .macro bti what=
    77. 

  77. 	__bti_\what
    78. 

  78. .endm
    79. 

  79. 

  80. #endif /* ! ASSEMBLER_H */
    81.