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bootloader_support: move anti rollback API to common loader section

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API `bootloader_common_get_partition_description` is required for
anti-rollback feature and should be part of common loader code.
This commit is contained in:
Mahavir Jain
2020-09-29 12:28:17 +05:30
parent 5b344610c9
commit ab988ab5ca
2 changed files with 38 additions and 24 deletions
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38
components/bootloader_support/src/bootloader_common_loader.c
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@@ -1,3 +1,17 @@
// Copyright 2020 Espressif Systems (Shanghai) Co., Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "string.h"
#include "sdkconfig.h"
#include "esp_err.h"
@@ -20,6 +34,7 @@
#include "esp_image_format.h"
#include "bootloader_sha.h"
#include "sys/param.h"
#include "bootloader_flash_priv.h"
#define ESP_PARTITION_HASH_LEN 32 /* SHA-256 digest length */
@@ -97,6 +112,29 @@ int bootloader_common_select_otadata(const esp_ota_select_entry_t *two_otadata,
return active_otadata;
}
esp_err_t bootloader_common_get_partition_description(const esp_partition_pos_t *partition, esp_app_desc_t *app_desc)
{
if (partition == NULL || app_desc == NULL || partition->offset == 0) {
return ESP_ERR_INVALID_ARG;
}
const uint32_t app_desc_offset = sizeof(esp_image_header_t) + sizeof(esp_image_segment_header_t);
const uint32_t mmap_size = app_desc_offset + sizeof(esp_app_desc_t);
const uint8_t *image = bootloader_mmap(partition->offset, mmap_size);
if (image == NULL) {
ESP_LOGE(TAG, "bootloader_mmap(0x%x, 0x%x) failed", partition->offset, mmap_size);
return ESP_FAIL;
}
memcpy(app_desc, image + app_desc_offset, sizeof(esp_app_desc_t));
bootloader_munmap(image);
if (app_desc->magic_word != ESP_APP_DESC_MAGIC_WORD) {
return ESP_ERR_NOT_FOUND;
}
return ESP_OK;
}
#if defined( CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP ) || defined( CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC )