From 8fae948c3243b4ca35313df38afca7f463278a9a Mon Sep 17 00:00:00 2001
From: Amoelle <amoelle@proton.me>
Date: Fri, 18 Jul 2025 12:36:18 +0300
Subject: [PATCH] implement kernel panic

---
 common.c |  4 +++-
 kernel.c | 15 ++++++++++-----
 kernel.h |  6 ++++++
 3 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/common.c b/common.c
index e273a27..67894f4 100644
--- a/common.c
+++ b/common.c
@@ -84,7 +84,9 @@ char *strcpy(char *dst, const char *src) {
     *d++ = *src++;
   *d = '\0';
   return dst;
-}
+} // The strcpy function continues copying even if
+  // src is longer than the memory area of dst. 
+  // This can easily lead to bugs and vulnerabilities
 
 int strcmp(const char *s1, const char *s2) {
   while (*s1 && *s2) {
diff --git a/kernel.c b/kernel.c
index 0bc2384..6a9c271 100644
--- a/kernel.c
+++ b/kernel.c
@@ -27,12 +27,17 @@ void putchar(char ch) {
 }
 
 void kernel_main(void) {
-    printf("\n\nHello %s\n", "RETARD!");
-    printf("60 + 9 = %d, %x\n", 60 + 9, 0x1234abcd);
+    // printf("\n\nHello %s\n", "friend :3");
+    // printf("60 + 9 = %d, %x\n", 60 + 9, 0x1234abcd);
+    //
+    // for (;;) {
+    //     __asm__ __volatile__("wfi");
+    // }
+    
+    memset(__bss, 0, (size_t) __bss_end - (size_t) __bss);
 
-    for (;;) {
-        __asm__ __volatile__("wfi");
-    }
+    PANIC("BOOOO!!! GET INFECTED WITH BOOTKID YOU SKID! 0x1337h@x0r");
+    printf("you lucky bitch got away\n");
 }
 
 __attribute__((section(".text.boot")))
diff --git a/kernel.h b/kernel.h
index 4faa208..d8027d0 100644
--- a/kernel.h
+++ b/kernel.h
@@ -4,3 +4,9 @@ struct sbiret {
     long error;
     long value;
 };
+
+#define PANIC(fmt, ...)                                                                             \
+    do {                                                                                            \
+        printf("YOU GOT A PANIC ERROR: %s:%d: " fmt "\n", __FILE__, __LINE__, ##__VA_ARGS__);       \
+        while (1) {}                                                                                \
+    } while (0)