diff --git a/kaleid/kernel/ke/syscall.c b/kaleid/kernel/ke/syscall.c
index 6dcc7cd..d22ea84 100644
--- a/kaleid/kernel/ke/syscall.c
+++ b/kaleid/kernel/ke/syscall.c
@@ -61,16 +61,38 @@ static error_t syscallStub(void *rdi, void *rsi, void *rdx, ISRFrame_t *regs)
     return ENOSYS;
 }
 
-static error_t syscallRead(void *rdi, void *rsi, void *rdx, ISRFrame_t *regs)
+static error_t syscallRead(void *descriptor, void *address, void *flags, ISRFrame_t *regs)
 {
     return ENOSYS;
 }
 
-static error_t syscallWrite(void *rdi, void *rsi, void *rdx, ISRFrame_t *regs)
+static error_t syscallWrite(void *descriptor, void *address, void *flags, ISRFrame_t *regs)
 {
     return ENOSYS;
 }
 
+static error_t syscallOpen(void *descriptor, void *address, void *size, ISRFrame_t *regs)
+{
+    /* TODO 
+        - lock the zone 
+        - check if permitted
+        - modify descriptor according to what has been done
+        - return */
+        
+    return ENOSYS;
+}
+
+static error_t syscallClose(void *descriptor, void *address, void *flags, ISRFrame_t *regs)
+{
+    /* TODO 
+        - lock the zone 
+        - check if permitted using descriptor
+        - use flags to know what to do
+        - return */
+        
+    return ENOSYS;
+}
+
 static error_t syscallKernelShell(void *rdi, void *rsi, void *rdx, ISRFrame_t *regs)
 {
     KeEnableIRQs();
@@ -86,7 +108,8 @@ void KeEnableSyscalls()
 {
     syscallTable[0] = syscallRead;
     syscallTable[1] = syscallWrite;
-    syscallTable[2] = syscallStub;
-    syscallTable[3] = syscallStub;
+    syscallTable[2] = syscallOpen;
+    syscallTable[3] = syscallClose;
     syscallTable[4] = syscallKernelShell;
+    syscallTable[5] = syscallStub;
 }