Merge branch 'feature/init_os_before_start_it' into 'master'

Add option to init OS before starting it

See merge request sdk/ESP8266_RTOS_SDK!859

components/esp8266/Kconfig

@@ -236,6 +236,15 @@ config CRYSTAL_USED_40MHZ
     bool "40MHz"
 endchoice
 
+config INIT_OS_BEFORE_START
+    bool "Init OS before starting it"
+    default n
+    depends on DISABLE_FREERTOS
+    help
+        Some OSes should initialize their global data structure before starting them. rt-thread is like this one.
+
+        FreeRTOS need not do this.
+
 config ESP8266_OTA_FROM_OLD
     bool "(**Expected**)ESP8266 update from old SDK by OTA"
     default n

components/esp8266/source/startup.c

@@ -155,6 +155,11 @@ void call_user_start(size_t start_addr)
 
     heap_caps_init();
 
+#ifdef CONFIG_INIT_OS_BEFORE_START
+    extern int __esp_os_init(void);
+    assert(__esp_os_init() == 0);
+#endif
+
 #if defined(CONFIG_NEWLIB_LIBRARY_LEVEL_NORMAL) || defined(CONFIG_NEWLIB_LIBRARY_LEVEL_NANO)
     esp_newlib_init();
 #endif