Implement BlDbgPrint() for printing debug messages to the serial console and rename loader entry point

xtldr/efiutil.c

@@ -9,6 +9,35 @@
 #include <xtbl.h>
 
 
+/**
+ * This routine formats the input string and prints it out to the serial console.
+ *
+ * @param Format
+ *        The formatted string that is to be written to the output.
+ *
+ * @param ...
+ *        Depending on the format string, this routine might expect a sequence of additional arguments.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+VOID
+BlDbgPrint(IN PUINT16 Format,
+           IN ...)
+{
+    VA_LIST Arguments;
+
+    /* Initialise the va_list */
+    VA_START(Arguments, Format);
+
+    /* Format and print the string to the serial console */
+    BlStringPrint(BlComPortPutChar, Format, Arguments);
+
+    /* Clean up the va_list */
+    VA_END(Arguments);
+}
+
 /**
  * This routine formats the input string and prints it out to the stdout and serial console.
  *
@@ -22,7 +51,7 @@
  *
  * @since XT 1.0
  *
- * @todo Check if GOP is active and use it instead of default conout protocol; duplicate output to serial console.
+ * @todo Check if GOP is active and use it instead of default conout protocol
  */
 VOID
 BlEfiPrint(IN PUINT16 Format,
@@ -36,6 +65,9 @@ BlEfiPrint(IN PUINT16 Format,
     /* Format and print the string to the stdout */
     BlStringPrint(BlConsolePutChar, Format, Arguments);
 
+    /* Format and print the string to the serial console */
+    BlStringPrint(BlComPortPutChar, Format, Arguments);
+
     /* Clean up the va_list */
     VA_END(Arguments);
 }