Re-sync with upstream and stripping away none kernel related.

portable/ThirdParty/GCC/Xtensa_ESP32/FreeRTOS-openocd.c

@@ -0,0 +1,24 @@
+/*
+ * Since at least FreeRTOS V7.5.3 uxTopUsedPriority is no longer
+ * present in the kernel, so it has to be supplied by other means for
+ * OpenOCD's threads awareness.
+ *
+ * Add this file to your project, and, if you're using --gc-sections,
+ * ``--undefined=uxTopUsedPriority'' (or
+ * ``-Wl,--undefined=uxTopUsedPriority'' when using gcc for final
+ * linking) to your LDFLAGS; same with all the other symbols you need.
+ */
+
+#include "FreeRTOS.h"
+#include "esp_attr.h"
+#include "sdkconfig.h"
+
+#ifdef __GNUC__
+#define USED __attribute__((used))
+#else
+#define USED
+#endif
+
+#ifdef CONFIG_ESP32_DEBUG_OCDAWARE
+const int USED DRAM_ATTR uxTopUsedPriority = configMAX_PRIORITIES - 1;
+#endif