i think it works

code/kernel/ke_debug.c

@@ -0,0 +1,29 @@
+// ke_debug.c - debugging utilities
+#include "hal_api.h"
+#include <stdarg.h>
+#include <stdint.h>
+#include <string.h>
+#include "printf.h"
+int _fltused; // fuckass
+
+int gDebugEnabled = 0;
+void (*PrintChar)(char, uint32_t, uint32_t);
+
+void kernel_putchar(char c) {
+    PrintChar(c, 0x00FF00, 0x000000);
+}
+
+void DbgPrint(const char* fmt, ...) {
+    if (!gDebugEnabled) return;
+
+    va_list va;
+    va_start(va, fmt);
+    vprintf(fmt, va);
+    va_end(va);
+}
+
+void KeInitDebug(void (*PrintPtr)(char, uint32_t, uint32_t), int v) {
+    gDebugEnabled = v;
+    PrintChar = PrintPtr;
+    printf_set_putchar(kernel_putchar);
+}