diff --git a/stdlib/debug.sl b/stdlib/debug.sl
new file mode 100644
index 0000000..8429b5c
--- /dev/null
+++ b/stdlib/debug.sl
@@ -0,0 +1,22 @@
+# : dump ( n -- )
+
+# dump takes the firts element from the stack
+# and prints that much consequent elements
+# from the stack while not modifying it
+
+: dump
+    1 swap
+	for
+        dup pick
+		puti cr
+        1 +
+	next
+    drop
+;
+
+# : int3 ( -- )
+:asm int3 {
+	int3
+}
+;
+
diff --git a/stdlib/stdlib.sl b/stdlib/stdlib.sl
index fe3ca5e..6a70154 100644
--- a/stdlib/stdlib.sl
+++ b/stdlib/stdlib.sl
@@ -1,16 +1,3 @@
-: debug
-	for
-		puti cr
-	next
-	exit
-;
-
-# : int3 ( -- )
-:asm int3 {
-	int3
-}
-;
-
 # : c@ ( addr -- byte )
 :asm c@ {
 	mov rax, [r12]         ; get address from stack
@@ -304,6 +291,7 @@
 	mov rdi, [r12]         ; addr
 	mov rax, 9             ; syscall: mmap
 	syscall
+	sub r12, 8
 	mov [r12], rax         ; return addr
 }
 ;
@@ -315,6 +303,7 @@
 	mov rdi, [r12]         ; addr
 	mov rax, 11            ; syscall: munmap
 	syscall
+	sub r12, 8
 	mov [r12], rax         ; return value
 }
 ;