fix(bootloader_support): Add missing c linkage to some headers

components/bootloader_support/private_include/bootloader_console.h

@@ -1,11 +1,15 @@
 /*
- * SPDX-FileCopyrightText: 2020-2021 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2020-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
 
 #pragma once
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * @brief Initialize console output (UART or USB)
  */
@@ -21,3 +25,7 @@ void bootloader_console_deinit(void);
  * Only defined if USB CDC is used for console output.
  */
 void bootloader_console_write_char_usb(char c);
+
+#ifdef __cplusplus
+}
+#endif

components/bootloader_support/private_include/bootloader_init.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2018-2021 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2018-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -8,6 +8,10 @@
 #include "esp_err.h"
 #include "esp_image_format.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**@{*/
 /**
  * @brief labels from bootloader linker script: bootloader.ld
@@ -49,3 +53,7 @@ void bootloader_print_banner(void);
  *          ESP_FAIL - If the setting is not successful.
  */
 esp_err_t bootloader_init(void);
+
+#ifdef __cplusplus
+}
+#endif

components/bootloader_support/private_include/bootloader_sha.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2017-2021 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2017-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -8,18 +8,29 @@
 /* Provide a SHA256 API for bootloader_support code,
    that can be used from bootloader or app code.
 
-   This header is available to source code in the bootloader & bootloader_support components only.
-   Use mbedTLS APIs or include esp32/sha.h to calculate SHA256 in IDF apps.
+   This header is available to source code in the bootloader &
+   bootloader_support components only. Use mbedTLS APIs or include esp32/sha.h
+   to calculate SHA256 in IDF apps.
 */
 
+#include "esp_err.h"
 #include <stdint.h>
 #include <stdlib.h>
-#include "esp_err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 typedef void *bootloader_sha256_handle_t;
 
 bootloader_sha256_handle_t bootloader_sha256_start(void);
 
-void bootloader_sha256_data(bootloader_sha256_handle_t handle, const void *data, size_t data_len);
+void bootloader_sha256_data(bootloader_sha256_handle_t handle, const void *data,
+                            size_t data_len);
+
+void bootloader_sha256_finish(bootloader_sha256_handle_t handle,
+                              uint8_t *digest);
 
-void bootloader_sha256_finish(bootloader_sha256_handle_t handle, uint8_t *digest);
+#ifdef __cplusplus
+}
+#endif

components/bootloader_support/private_include/bootloader_signature.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2022-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -27,34 +27,55 @@
 #include "esp32p4/rom/secure_boot.h"
 #endif
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #if !CONFIG_IDF_TARGET_ESP32 || CONFIG_ESP32_REV_MIN_FULL >= 300
 
 #if CONFIG_SECURE_BOOT_V2_ENABLED || CONFIG_SECURE_SIGNED_APPS_NO_SECURE_BOOT
 
 /** @brief Verify the secure boot signature block for Secure Boot V2.
  *
- *  Performs RSA-PSS or ECDSA verification of the SHA-256 image based on the public key
- *  in the signature block, compared against the public key digest stored in efuse.
+ *  Performs RSA-PSS or ECDSA verification of the SHA-256 image based on the
+ * public key in the signature block, compared against the public key digest
+ * stored in efuse.
  *
- * Similar to esp_secure_boot_verify_signature(), but can be used when the digest is precalculated.
+ * Similar to esp_secure_boot_verify_signature(), but can be used when the
+ * digest is precalculated.
  * @param sig_block Pointer to signature block data
  * @param image_digest Pointer to 32 byte buffer holding SHA-256 hash.
- * @param verified_digest Pointer to 32 byte buffer that will receive verified digest if verification completes. (Used during bootloader implementation only, result is invalid otherwise.)
+ * @param verified_digest Pointer to 32 byte buffer that will receive verified
+ * digest if verification completes. (Used during bootloader implementation
+ * only, result is invalid otherwise.)
  *
  */
-esp_err_t esp_secure_boot_verify_sbv2_signature_block(const ets_secure_boot_signature_t *sig_block, const uint8_t *image_digest, uint8_t *verified_digest);
+esp_err_t esp_secure_boot_verify_sbv2_signature_block(
+    const ets_secure_boot_signature_t *sig_block, const uint8_t *image_digest,
+    uint8_t *verified_digest);
 
-/** @brief Legacy function to verify RSA secure boot signature block for Secure Boot V2.
+/** @brief Legacy function to verify RSA secure boot signature block for Secure
+ * Boot V2.
  *
- * @note This is kept for backward compatibility. It internally calls esp_secure_boot_verify_sbv2_signature_block.
+ * @note This is kept for backward compatibility. It internally calls
+ * esp_secure_boot_verify_sbv2_signature_block.
  *
  * @param sig_block Pointer to RSA signature block data
  * @param image_digest Pointer to 32 byte buffer holding SHA-256 hash.
- * @param verified_digest Pointer to 32 byte buffer that will receive verified digest if verification completes. (Used during bootloader implementation only, result is invalid otherwise.)
+ * @param verified_digest Pointer to 32 byte buffer that will receive verified
+ * digest if verification completes. (Used during bootloader implementation
+ * only, result is invalid otherwise.)
  *
  */
-esp_err_t esp_secure_boot_verify_rsa_signature_block(const ets_secure_boot_signature_t *sig_block, const uint8_t *image_digest, uint8_t *verified_digest);
+esp_err_t esp_secure_boot_verify_rsa_signature_block(
+    const ets_secure_boot_signature_t *sig_block, const uint8_t *image_digest,
+    uint8_t *verified_digest);
 
-#endif /* CONFIG_SECURE_BOOT_V2_ENABLED || CONFIG_SECURE_SIGNED_APPS_NO_SECURE_BOOT */
+#endif /* CONFIG_SECURE_BOOT_V2_ENABLED ||                                     \
+          CONFIG_SECURE_SIGNED_APPS_NO_SECURE_BOOT */
+
+#endif
 
+#ifdef __cplusplus
+}
 #endif

components/bootloader_support/private_include/bootloader_soc.h

@@ -1,10 +1,15 @@
 /*
- * SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
 #pragma once
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 /**
  * @brief Configure analog super WDT reset
  *
@@ -25,3 +30,7 @@ void bootloader_ana_bod_reset_config(bool enable);
  * @param enable Boolean to enable or disable clock glitch reset
  */
 void bootloader_ana_clock_glitch_reset_config(bool enable);
+
+#ifdef __cplusplus
+}
+#endif

components/bootloader_support/private_include/bootloader_utility.h

@@ -9,6 +9,11 @@
 #include "esp_image_format.h"
 #include "bootloader_config.h"
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 /**
  * @brief Load partition table.
  *
@@ -120,3 +125,7 @@ void bootloader_debug_buffer(const void *buffer, size_t length, const char *labe
  * @return ESP_OK if secure boot digest is generated successfully.
  */
 esp_err_t bootloader_sha256_flash_contents(uint32_t flash_offset, uint32_t len, uint8_t *digest);
+
+#ifdef __cplusplus
+}
+#endif