Handle IRQs inside the kernel

kernel/amd64/debug.c

@@ -60,6 +60,30 @@ void debugprintf (const char* fmt, ...) {
   spin_unlock (&serial_lock, f1);
 }
 
+void debugprintf_nolock (const char* fmt, ...) {
+  uint64_t f1;
+
+  if (!debug_is_init)
+    return;
+
+  char buffer[BUFFER_SIZE];
+  memset (buffer, 0, sizeof (buffer));
+
+  va_list ap;
+  va_start (ap, fmt);
+  vsnprintf (buffer, sizeof (buffer), fmt, ap);
+  va_end (ap);
+
+  buffer[sizeof (buffer) - 1] = '\0';
+
+  const char* p = buffer;
+
+  while (*p) {
+    debug_serial_write (*p);
+    p++;
+  }
+}
+
 /* Initialize serial */
 void debug_init (void) {
   outb (PORT_COM1 + 1, 0x00);