From 31673c0ac9b8164860833cbf416f17c233d90457 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Sat, 19 Nov 2022 15:53:58 +0100
Subject: [PATCH] Introduce format attribute

---
 kernel/src/arch/Serial.h | 3 ++-
 luna/Format.h            | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/src/arch/Serial.h b/kernel/src/arch/Serial.h
index 92a0725e..70553b25 100644
--- a/kernel/src/arch/Serial.h
+++ b/kernel/src/arch/Serial.h
@@ -1,4 +1,5 @@
 #pragma once
+#include <Format.h>
 #include <Types.h>
 
 namespace Serial
@@ -7,5 +8,5 @@ namespace Serial
     void write(const char* str, usize size);
     void print(const char* str);
     void println(const char* str);
-    int printf(const char* str, ...);
+    int printf(const char* str, ...) _format(1, 2);
 }
\ No newline at end of file
diff --git a/luna/Format.h b/luna/Format.h
index 71ad0659..e908f76c 100644
--- a/luna/Format.h
+++ b/luna/Format.h
@@ -3,6 +3,8 @@
 #include <Types.h>
 #include <stdarg.h>
 
+#define _format(n, m) __attribute__((format(printf, n, m)))
+
 typedef int (*callback_t)(char, void*);
 
 isize cstyle_format(const char* format, callback_t callback, void* arg, va_list ap);
\ No newline at end of file