diff --git a/kernel/syscall/skeleton.cc b/kernel/syscall/skeleton.cc
index 54cb156..46306cc 100644
--- a/kernel/syscall/skeleton.cc
+++ b/kernel/syscall/skeleton.cc
@@ -128,6 +128,8 @@ namespace Syscall {
     }
 
     void exit(Vault &vault) {
+
+      unmap(vault, (void*) 0x4000, 512 );
       vault.scheduler.exit();
     }
 
@@ -190,6 +192,7 @@ namespace Syscall {
         for (uint32_t p =0; p<512 ; p++) {
           if (subbytable->entries[p].present==1 && subbytable->entries[p].address==i) { 
             invlpg(i);
+            PageFrameAllocator::free(subbytable->entries[p].address);
             subbytable->entries[i].present =0;
           }
         }
diff --git a/libsys/build/libc.d b/libsys/build/libc.d
new file mode 100644
index 0000000..848caf6
--- /dev/null
+++ b/libsys/build/libc.d
@@ -0,0 +1 @@
+build/libc.o: libc.cc libc.h types.h
diff --git a/libsys/build/libc.o b/libsys/build/libc.o
new file mode 100644
index 0000000..74b83a9
Binary files /dev/null and b/libsys/build/libc.o differ
diff --git a/libsys/build/libsys.a b/libsys/build/libsys.a
new file mode 100644
index 0000000..7b8a512
Binary files /dev/null and b/libsys/build/libsys.a differ
diff --git a/libsys/build/outputstream.d b/libsys/build/outputstream.d
new file mode 100644
index 0000000..7b1d3a0
--- /dev/null
+++ b/libsys/build/outputstream.d
@@ -0,0 +1,2 @@
+build/outputstream.o: outputstream.cc outputstream.h stringbuffer.h \
+ types.h
diff --git a/libsys/build/outputstream.o b/libsys/build/outputstream.o
new file mode 100644
index 0000000..99c4caf
Binary files /dev/null and b/libsys/build/outputstream.o differ
diff --git a/libsys/build/string.d b/libsys/build/string.d
new file mode 100644
index 0000000..54fd952
--- /dev/null
+++ b/libsys/build/string.d
@@ -0,0 +1 @@
+build/string.o: string.cc string.h types.h
diff --git a/libsys/build/string.o b/libsys/build/string.o
new file mode 100644
index 0000000..cf9b3b5
Binary files /dev/null and b/libsys/build/string.o differ
diff --git a/libsys/build/stringbuffer.d b/libsys/build/stringbuffer.d
new file mode 100644
index 0000000..9e00c33
--- /dev/null
+++ b/libsys/build/stringbuffer.d
@@ -0,0 +1 @@
+build/stringbuffer.o: stringbuffer.cc stringbuffer.h types.h
diff --git a/libsys/build/stringbuffer.o b/libsys/build/stringbuffer.o
new file mode 100644
index 0000000..0f54d08
Binary files /dev/null and b/libsys/build/stringbuffer.o differ
diff --git a/libsys/build/stub.asm.d b/libsys/build/stub.asm.d
new file mode 100644
index 0000000..8a0dadc
--- /dev/null
+++ b/libsys/build/stub.asm.d
@@ -0,0 +1,2 @@
+build/stub.asm.o : stub.asm
+
diff --git a/libsys/build/stub.asm.o b/libsys/build/stub.asm.o
new file mode 100644
index 0000000..4641a8c
Binary files /dev/null and b/libsys/build/stub.asm.o differ