This commit add to GDBstup:

1. Multicore suupor
2. Stepping
3. Console output
4. Update example + readme
5. Jumps

components/freertos/FreeRTOS-Kernel/portable/port_common.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -68,7 +68,7 @@ void esp_startup_start_app_common(void)
 
     esp_crosscore_int_init();
 
-#ifdef CONFIG_ESP_SYSTEM_GDBSTUB_RUNTIME
+#if CONFIG_ESP_SYSTEM_GDBSTUB_RUNTIME && !CONFIG_IDF_TARGET_ESP8684
     esp_gdbstub_init();
 #endif // CONFIG_ESP_SYSTEM_GDBSTUB_RUNTIME
 

components/freertos/FreeRTOS-Kernel/portable/xtensa/xtensa_vector_defaults.S

@@ -25,6 +25,8 @@ The default behaviour is to just exit the interrupt or call the panic handler on
 
 _xt_debugexception:
 #if (CONFIG_ESP32_ECO3_CACHE_LOCK_FIX && CONFIG_BTDM_CTRL_HLI)
+    s32i    a0, sp, XT_STK_EXIT
+
 #define XT_DEBUGCAUSE_DI        (5)
     getcoreid   a0
 #if (CONFIG_BTDM_CTRL_PINNED_TO_CORE == PRO_CPU_NUM)
@@ -48,7 +50,11 @@ _xt_debugexception:
     wsr     a0,EPC_1
     rsr     a0,(EXCSAVE + XCHAL_DEBUGLEVEL)
     wsr     a0,EXCSAVE_1
+#if CONFIG_ESP_SYSTEM_GDBSTUB_RUNTIME
+    J   _xt_panic_gdbstub                   /* For gdbstub we make jump */
+#else
     call0   _xt_panic                       /* does not return */
+#endif // CONFIG_ESP_SYSTEM_GDBSTUB_RUNTIME
     rfi     XCHAL_DEBUGLEVEL
 
 #if (CONFIG_ESP32_ECO3_CACHE_LOCK_FIX && CONFIG_BTDM_CTRL_HLI)

components/freertos/FreeRTOS-Kernel/portable/xtensa/xtensa_vectors.S

@@ -443,7 +443,7 @@ Debug Exception.
     .global     xt_debugexception
 _DebugExceptionVector:
     wsr     a0, EXCSAVE+XCHAL_DEBUGLEVEL    /* preserve a0 */
-    call0   xt_debugexception            /* load exception handler */
+    J   xt_debugexception            /* load exception handler */
 
     .end        literal_prefix