diff --git a/src/Makefile b/src/Makefile
index dc84b18..d9abf7d 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -20,7 +20,7 @@ CPPFLAGS =        \
 	$(MRUBY_FLAGS)  \
 	-DKERNAUX_DEBUG \
 
-OBJS = start.S.o main.c.o libc.c.o
+OBJS = start.S.o main.c.o libc.c.o logger.c.o
 
 all: $(MRUBYVISOR)
 
diff --git a/src/libc.c b/src/libc.c
index 661d050..31833a9 100644
--- a/src/libc.c
+++ b/src/libc.c
@@ -1,4 +1,5 @@
 #include "libc.h"
+#include "logger.h"
 
 #include <stdlib.h>
 
@@ -42,7 +43,7 @@ void my_abort()
 
 void my_exit(const int status)
 {
-    kernaux_drivers_console_printf("exit: %d\n", status);
+    logger_exit(status);
     kernaux_drivers_shutdown_poweroff();
 
     // TODO: libkernaux shutdown poweroff noreturn
diff --git a/src/logger.c b/src/logger.c
new file mode 100644
index 0000000..0da8a7b
--- /dev/null
+++ b/src/logger.c
@@ -0,0 +1,16 @@
+#include "logger.h"
+
+#include <kernaux/drivers/console.h>
+
+void logger_assert(
+    const char *const file,
+    const int line,
+    const char *const str
+) {
+    kernaux_drivers_console_printf("panic: %s:%u: \"%s\"\n", file, line, str);
+}
+
+void logger_exit(const int status)
+{
+    kernaux_drivers_console_printf("exit: %d\n", status);
+}
diff --git a/src/logger.h b/src/logger.h
new file mode 100644
index 0000000..fd0afee
--- /dev/null
+++ b/src/logger.h
@@ -0,0 +1,7 @@
+#ifndef INCLUDED_LOGGER
+#define INCLUDED_LOGGER
+
+void logger_assert(const char *file, int line, const char *str);
+void logger_exit(int status);
+
+#endif
diff --git a/src/main.c b/src/main.c
index 8b21caa..45f9bb0 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,4 +1,5 @@
 #include "libc.h"
+#include "logger.h"
 
 #include <stdbool.h>
 #include <stddef.h>
@@ -76,7 +77,7 @@ void main(
 
 void assert(const char *const file, const int line, const char *const str)
 {
-    kernaux_drivers_console_printf("panic: %s:%u: \"%s\"\n", file, line, str);
+    logger_assert(file, line, str);
     kernaux_drivers_shutdown_poweroff();
 }