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| 1 | +/* |
| 2 | + * SPDX-License-Identifier: Apache-2.0 |
| 3 | + * |
| 4 | + * Copyright (c) 2021 Nordic Semiconductor ASA |
| 5 | + * |
| 6 | + * Original license: |
| 7 | + * |
| 8 | + * Licensed to the Apache Software Foundation (ASF) under one |
| 9 | + * or more contributor license agreements. See the NOTICE file |
| 10 | + * distributed with this work for additional information |
| 11 | + * regarding copyright ownership. The ASF licenses this file |
| 12 | + * to you under the Apache License, Version 2.0 (the |
| 13 | + * "License"); you may not use this file except in compliance |
| 14 | + * with the License. You may obtain a copy of the License at |
| 15 | + * |
| 16 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 17 | + * |
| 18 | + * Unless required by applicable law or agreed to in writing, |
| 19 | + * software distributed under the License is distributed on an |
| 20 | + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 21 | + * KIND, either express or implied. See the License for the |
| 22 | + * specific language governing permissions and limitations |
| 23 | + * under the License. |
| 24 | + */ |
| 25 | + |
| 26 | +/** |
| 27 | + * @file |
| 28 | + * @brief Hooks definition implementation API |
| 29 | + * |
| 30 | + * This file contains API interface definition for hooks which can be |
| 31 | + * implemented to overide or to amend some of MCUboot's native routines. |
| 32 | + */ |
| 33 | + |
| 34 | +#ifndef H_BOOTUTIL_HOOKS |
| 35 | +#define H_BOOTUTIL_HOOKS |
| 36 | + |
| 37 | +#ifdef MCUBOOT_IMAGE_ACCESS_HOOKS |
| 38 | + |
| 39 | +#define BOOT_HOOK_CALL(f, ret_default, ...) f(__VA_ARGS__) |
| 40 | + |
| 41 | +#define BOOT_HOOK_CALL_FIH(f, fih_ret_default, fih_rc, ...) \ |
| 42 | + do { \ |
| 43 | + FIH_CALL(f, fih_rc, __VA_ARGS__); \ |
| 44 | + } while(0); |
| 45 | + |
| 46 | +#else |
| 47 | + |
| 48 | +#define BOOT_HOOK_CALL(f, ret_default, ...) ret_default |
| 49 | + |
| 50 | +#define BOOT_HOOK_CALL_FIH(f, fih_ret_default, fih_rc, ...) \ |
| 51 | + do { \ |
| 52 | + fih_rc = fih_ret_default; \ |
| 53 | + } while(0); |
| 54 | + |
| 55 | +#endif |
| 56 | + |
| 57 | +/** Hook for provide image header data. |
| 58 | + * |
| 59 | + * This Hook may be used to overide image header read implementation or doing |
| 60 | + * a custom action before. |
| 61 | + * |
| 62 | + * @param img_index the index of the image pair |
| 63 | + * @param slot slot number |
| 64 | + * @param img_head image header structure to be populated |
| 65 | + * |
| 66 | + * @retval 0: header was read/populated, skip direct header data read |
| 67 | + * BOOT_HOOK_REGULAR: follow the normal execution path, |
| 68 | + * otherwise an error-code value. |
| 69 | + */ |
| 70 | +int boot_read_image_header_hook(int img_index, int slot, |
| 71 | + struct image_header *img_head); |
| 72 | + |
| 73 | +/** Hook for Validate image hash/signature |
| 74 | + * |
| 75 | + * This Hook may be used to overide image validation procedure or doing |
| 76 | + * a custom action before. |
| 77 | + * |
| 78 | + * @param img_index the index of the image pair |
| 79 | + * @param slot slot number |
| 80 | + * |
| 81 | + * @retval FIH_SUCCESS: image is valid, skip direct validation |
| 82 | + * FIH_FAILURE: image is invalid, skip direct validation |
| 83 | + * fih encoded BOOT_HOOK_REGULAR: follow the normal execution path. |
| 84 | + */ |
| 85 | +fih_int boot_image_check_hook(int img_index, int slot); |
| 86 | + |
| 87 | +/** Hook for implement image update |
| 88 | + * |
| 89 | + * This hook is for for implementing an alternative mechanism of image update or |
| 90 | + * doing a custom action before. |
| 91 | + * |
| 92 | + * @param img_index the index of the image pair |
| 93 | + * @param img_head the image header of the secondary image |
| 94 | + * @param area the flash area of the secondary image. |
| 95 | + * |
| 96 | + * @retval 0: update was done, skip performing the update |
| 97 | + * BOOT_HOOK_REGULAR: follow the normal execution path, |
| 98 | + * otherwise an error-code value. |
| 99 | + */ |
| 100 | +int boot_perform_update_hook(int img_index, struct image_header *img_head, |
| 101 | + const struct flash_area *area); |
| 102 | + |
| 103 | +/** Hook for implement image's post copying action |
| 104 | + * |
| 105 | + * This hook is for implement action which might be done right after image was |
| 106 | + * copied to the primary slot. This hook is called in MCUBOOT_OVERWRITE_ONLY |
| 107 | + * mode only. |
| 108 | + * |
| 109 | + * @param img_index the index of the image pair |
| 110 | + * @param area the flash area of the primary image. |
| 111 | + * @param size size of copied image. |
| 112 | + * |
| 113 | + * @retval 0: success, mcuboot will follow normal code execution flow after |
| 114 | + * execution of this call. |
| 115 | + * non-zero: an error, mcuboot will return from |
| 116 | + * boot_copy_image() with error. |
| 117 | + * Update will be undone so might be resume on the next boot. |
| 118 | + */ |
| 119 | +int boot_copy_region_post_hook(int img_index, const struct flash_area *area, |
| 120 | + size_t size); |
| 121 | + |
| 122 | +/** Hook for implement image's post recovery upload action |
| 123 | + * |
| 124 | + * This hook is for implement action which might be done right after image was |
| 125 | + * copied to the primary slot. This hook is called in serial recovery upload |
| 126 | + * operation. |
| 127 | + * |
| 128 | + * @param img_index the index of the image pair |
| 129 | + * @param area the flash area of the primary image. |
| 130 | + * @param size size of copied image. |
| 131 | + * |
| 132 | + * @retval 0: success, mcuboot will follow normal code execution flow after |
| 133 | + * execution of this call. |
| 134 | + * non-zero: an error, will be transferred as part of comand response |
| 135 | + * as "rc" entry. |
| 136 | + */ |
| 137 | +int boot_serial_uploaded_hook(int img_index, const struct flash_area *area, |
| 138 | + size_t size); |
| 139 | + |
| 140 | +/** Hook for implement the image's slot installation status fetch operation for |
| 141 | + * the MGMT custom command. |
| 142 | + * |
| 143 | + * The image's slot installation status is custom property. It's detailed |
| 144 | + * definition depends on user implementation. It is only defined that the status |
| 145 | + * will be set to 0 if this hook not provides another value. |
| 146 | + * |
| 147 | + * @param img_index the index of the image pair |
| 148 | + * @param slot slot number |
| 149 | + * @param img_install_stat the image installation status to be populated |
| 150 | + * |
| 151 | + * @retval 0: the installaton status was fetched successfully, |
| 152 | + * BOOT_HOOK_REGULAR: follow the normal execution path, status will be |
| 153 | + * set to 0 |
| 154 | + * otherwise an error-code value. Error-code is ignored, but it is up to |
| 155 | + * the implementation to reflect this error in img_install_stat. |
| 156 | + */ |
| 157 | +int boot_img_install_stat_hook(int image_index, int slot, |
| 158 | + int *img_install_stat); |
| 159 | + |
| 160 | +#endif /*H_BOOTUTIL_HOOKS*/ |
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