removes firmwares to just keep BSP

libwrap/sys/_exit.c

@@ -0,0 +1,30 @@
+/* See LICENSE of license details. */
+
+#include <unistd.h>
+#include "platform.h"
+#include "weak_under_alias.h"
+
+#if defined(BOARD_hifive1)
+static volatile uint32_t tohost;
+static volatile uint32_t fromhost;
+#else
+extern volatile uint32_t tohost;
+extern volatile uint32_t fromhost;
+#endif
+
+void write_hex(int fd, uint32_t hex);
+
+void __wrap_exit(int code)
+{
+//volatile uint32_t* leds = (uint32_t*) (GPIO_BASE_ADDR + GPIO_OUT_OFFSET);
+  const char message[] = "\nProgam has exited with code:";
+//*leds = (~(code));
+
+  write(STDERR_FILENO, message, sizeof(message) - 1);
+  write_hex(STDERR_FILENO, code);
+  write(STDERR_FILENO, "\n", 1);
+  tohost = code+1;
+  write(STDERR_FILENO, "\x04", 1);
+  for (;;);
+}
+weak_under_alias(exit);