Hang the system in kernel panic

include/hang.h

@@ -0,0 +1,6 @@
+#pragma once
+
+[[noreturn]] static inline void hang() {
+    while (true)
+        ;
+}

src/log.c

@@ -3,6 +3,7 @@
 #include <config.h>
 #include <dev.h>
 #include <driver.h>
+#include <hang.h>
 #include <init.h>
 #include <module.h>
 #include <stdarg.h>
@@ -80,6 +81,7 @@ void klogf(log_severity_t severity, const char *fmt, ...) {
         break;
     case LOG_SEVERITY_PANIC:
         kprintf("[\x1B[41mpanic\x1B[0m] ");
+        hang();
         break;
     }
     kvprintf(fmt, args);

src/syscalls/reboot.c

@@ -1,6 +1,7 @@
 #include <syscall.h>
 
 #include <errno.h>
+#include <hang.h>
 #include <sbi.h>
 
 typedef enum {
@@ -9,11 +10,6 @@ typedef enum {
     REBOOT_TYPE_HANG = 2,
 } reboot_type_t;
 
-[[noreturn]] void hang(void) {
-    while (true)
-        ;
-}
-
 isize sys_reboot(const trapframe_t *frame) {
     reboot_type_t type = frame->a0;