From ee93463c64cdd88f0dda7083d92ec5aebba113ec Mon Sep 17 00:00:00 2001
From: kamkow1 <kamkow256@gmail.com>
Date: Sat, 11 Oct 2025 21:54:06 +0200
Subject: [PATCH] Add rand() syscall

---
 kernel/syscall/randcrypto.c | 8 ++++++++
 kernel/syscall/randcrypto.h | 8 ++++++++
 kernel/syscall/syscall.c    | 2 ++
 share/sysdefs/syscall.h     | 1 +
 4 files changed, 19 insertions(+)
 create mode 100644 kernel/syscall/randcrypto.c
 create mode 100644 kernel/syscall/randcrypto.h

diff --git a/kernel/syscall/randcrypto.c b/kernel/syscall/randcrypto.c
new file mode 100644
index 0000000..28c7bb6
--- /dev/null
+++ b/kernel/syscall/randcrypto.c
@@ -0,0 +1,8 @@
+#include <stdint.h>
+#include <stddef.h>
+#include "hal/hal.h"
+#include "syscall.h"
+
+int32_t SYSCALL0(sys_rand) {
+  return hal_randnum();
+}
diff --git a/kernel/syscall/randcrypto.h b/kernel/syscall/randcrypto.h
new file mode 100644
index 0000000..a4e42dd
--- /dev/null
+++ b/kernel/syscall/randcrypto.h
@@ -0,0 +1,8 @@
+#ifndef SYSCALL_RANDCRYPTO_H_
+#define SYSCALL_RANDCRYPTO_H_
+
+#include "syscall.h"
+
+int32_t SYSCALL0(sys_rand);
+
+#endif // SYSCALL_RANDCRYPTO_H_
diff --git a/kernel/syscall/syscall.c b/kernel/syscall/syscall.c
index 479c961..a82be02 100644
--- a/kernel/syscall/syscall.c
+++ b/kernel/syscall/syscall.c
@@ -9,6 +9,7 @@
 #include "mman.h"
 #include "sched.h"
 #include "devctl.h"
+#include "randcrypto.h"
 
 int32_t SYSCALL1(sys_debugprint, string) {
   char *p = (char *)string;
@@ -25,4 +26,5 @@ SyscallFn SYSCALL_TABLE[SYSCALLS_MAX] = {
   [SYS_MMAN_UNMAP] = &sys_mman_unmap,
   [SYS_SCHEDRELEASE] = &sys_schedrelease,
   [SYS_DEVCTL]     = &sys_devctl,
+  [SYS_RAND]       = &sys_rand,
 };
diff --git a/share/sysdefs/syscall.h b/share/sysdefs/syscall.h
index 89286fa..597c46d 100644
--- a/share/sysdefs/syscall.h
+++ b/share/sysdefs/syscall.h
@@ -9,5 +9,6 @@
 #define SYS_MMAN_UNMAP 6
 #define SYS_SCHEDRELEASE 7
 #define SYS_DEVCTL     8
+#define SYS_RAND       9
 
 #endif // SHARE_HDRS_SYSCALL_H_