Implement random number generation with x86 rdrand

2025-10-11 21:36:33 +02:00
parent 02a5d8b418
commit b717387adb
2 changed files with 14 additions and 0 deletions
--- a/kernel/hal/x86_64/randnum.S
+++ b/kernel/hal/x86_64/randnum.S
@ -0,0 +1,13 @@
+.global hal_randnum
+hal_randnum:
+  mov $100, %ecx
+  xor %eax, %eax
+
+.retry:
+  rdrand %eax
+  jc .done
+  loop .retry
+.fail:
+  mov $-1, %eax
+.done:  
+  ret