Added new randomization features

1 files changed, 16 insertions, 6 deletions

diff --git a/libs/libc/crt/crt0.c b/libs/libc/crt/crt0.c
index 6c38474..3bd413f 100644
--- a/libs/libc/crt/crt0.c
+++ b/libs/libc/crt/crt0.c
@@ -1,18 +1,28 @@
 // MIT License, Copyright (c) 2021 Marvin Borner
 
+#include <assert.h>
 #include <def.h>
+#include <random.h>
 #include <sys.h>
 
 #ifdef USER
 
-extern int main(int, char **);
+extern u32 __stack_chk_guard;
+u32 __stack_chk_guard;
 
-void _start(void);
-void _start(void)
+int main(int, char **);
+
+int _start(int argc, char **argv);
+int _start(int argc, char **argv)
 {
-	exit(main(0, NULL));
-	while (1)
-		;
+	u32 stamp = 0;
+	assert(read("/dev/rtc", &stamp, 0, sizeof(stamp)) == sizeof(stamp) && stamp);
+	srand(stamp);
+	rand_fill(&__stack_chk_guard, sizeof(__stack_chk_guard));
+
+	exit(main(argc, argv));
+
+	return 1;
 }
 
 #endif