nrf_stack_guard.c 3.7 KB

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  1. /**
  2. * Copyright (c) 2016 - 2020, Nordic Semiconductor ASA
  3. *
  4. * All rights reserved.
  5. *
  6. * Redistribution and use in source and binary forms, with or without modification,
  7. * are permitted provided that the following conditions are met:
  8. *
  9. * 1. Redistributions of source code must retain the above copyright notice, this
  10. * list of conditions and the following disclaimer.
  11. *
  12. * 2. Redistributions in binary form, except as embedded into a Nordic
  13. * Semiconductor ASA integrated circuit in a product or a software update for
  14. * such product, must reproduce the above copyright notice, this list of
  15. * conditions and the following disclaimer in the documentation and/or other
  16. * materials provided with the distribution.
  17. *
  18. * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
  19. * contributors may be used to endorse or promote products derived from this
  20. * software without specific prior written permission.
  21. *
  22. * 4. This software, with or without modification, must only be used with a
  23. * Nordic Semiconductor ASA integrated circuit.
  24. *
  25. * 5. Any software provided in binary form under this license must not be reverse
  26. * engineered, decompiled, modified and/or disassembled.
  27. *
  28. * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
  29. * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  30. * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
  31. * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
  32. * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  33. * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  34. * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  37. * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  38. *
  39. */
  40. #include <stdint.h>
  41. #include "nrf.h"
  42. #include "nrf_assert.h"
  43. #include "nrf_strerror.h"
  44. #include "nrf_mpu_lib.h"
  45. #include "nrf_stack_guard.h"
  46. #define NRF_LOG_MODULE_NAME stack_guard
  47. #if NRF_STACK_GUARD_CONFIG_LOG_ENABLED
  48. #define NRF_LOG_LEVEL NRF_STACK_GUARD_CONFIG_LOG_LEVEL
  49. #define NRF_LOG_INFO_COLOR NRF_STACK_GUARD_CONFIG_INFO_COLOR
  50. #define NRF_LOG_DEBUG_COLOR NRF_STACK_GUARD_CONFIG_DEBUG_COLOR
  51. #endif
  52. #include "nrf_log.h"
  53. NRF_LOG_MODULE_REGISTER();
  54. #if NRF_STACK_GUARD_ENABLED
  55. STATIC_ASSERT(STACK_GUARD_SIZE >= 32);
  56. ret_code_t nrf_stack_guard_init(void)
  57. {
  58. nrf_mpu_lib_region_t region;
  59. uint32_t attributes;
  60. ret_code_t status;
  61. ASSERT((STACK_GUARD_BASE + STACK_GUARD_SIZE) < (uint32_t)((void *)(STACK_TOP)));
  62. attributes = (0x05 << MPU_RASR_TEX_Pos) | (1 << MPU_RASR_B_Pos) | /* Normal memory, WBWA/WBWA */
  63. (0x07 << MPU_RASR_AP_Pos) | (1 << MPU_RASR_XN_Pos); /* Access: RO/RO, XN */
  64. status = nrf_mpu_lib_region_create(&region,
  65. (void *)(STACK_GUARD_BASE),
  66. STACK_GUARD_SIZE,
  67. attributes);
  68. if (status == NRF_SUCCESS)
  69. {
  70. NRF_LOG_INFO("Stack Guard (%u bytes): 0x%08X-0x%08X (total stack size: %u bytes, usable stack area: %u bytes)",
  71. STACK_GUARD_SIZE,
  72. STACK_GUARD_BASE,
  73. STACK_GUARD_BASE + STACK_GUARD_SIZE - 1,
  74. STACK_SIZE,
  75. REAL_STACK_SIZE);
  76. }
  77. else
  78. {
  79. NRF_LOG_ERROR("Cannot create stack guard page! Error: %u [%s]", status, (uint32_t)nrf_strerror_get(status));
  80. }
  81. return status;
  82. }
  83. #endif /* NRF_STACK_GUARD_ENABLED */