From 7d7f0aa9595bedf50083fb89dae049c1f064ca98 Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Thu, 4 Jul 2024 18:29:17 +0200
Subject: Random: Improve random seeding.

Now it appears to be sufficiently good at producing a distinct seed at
each boot without using a /etc/seed file. Previously it did not do this.

Of course this is nowhere near cryptographically secure but randomness
does assist with things such as kmalloc.
---
 kernel/drivers/pit.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'kernel/drivers')

diff --git a/kernel/drivers/pit.c b/kernel/drivers/pit.c
index 70dc0f9..b8a8aac 100644
--- a/kernel/drivers/pit.c
+++ b/kernel/drivers/pit.c
@@ -1,5 +1,6 @@
 #include "pit.h"
 #include <arch/i386/tsc.h>
+#include <random.h>
 
 #define PIT_IO_CHANNEL_0 0x40
 #define PIT_IO_MODE_COMMAND 0x43
@@ -46,7 +47,8 @@ u64 last_tsc = 0;
 
 extern int is_switching_tasks;
 void int_clock(reg_t *regs) {
-
+  u64 current_tsc = tsc_get();
+  random_add_entropy_fast((u8 *)&current_tsc, sizeof(current_tsc));
   switch_counter++;
   if (clock_num_ms_ticks - last_flush > 50) {
     tcp_flush_acks();
-- 
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