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.

1 files changed, 3 insertions, 0 deletions

diff --git a/kernel/timer.c b/kernel/timer.c
index d0ef113..2121462 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -3,6 +3,7 @@
 #include <fs/devfs.h>
 #include <interrupts.h>
 #include <math.h>
+#include <random.h>
 #include <time.h>
 #include <timer.h>
 #include <typedefs.h>
@@ -14,6 +15,7 @@ u64 start_tsc_time;
 void timer_start_init(void) {
   tsc_init();
   start_tsc_time = tsc_get();
+  random_add_entropy((u8 *)&start_tsc_time, sizeof(start_tsc_time));
   enable_interrupts();
   cmos_init();
   cmos_start_call(1, &has_unix_time, &start_unix_time);
@@ -26,6 +28,7 @@ void timer_wait_for_init(void) {
     ;
 }
 
+u64 timer_current_uptime = 0; // This gets updated by the PIT handler
 u64 timer_get_uptime(void) {
   return tsc_calculate_ms(tsc_get());
 }