User code cannot trigger syscall!

kaleid/kernel/sh/testcmds.c

@@ -366,12 +366,10 @@ error_t CmdRing3Test(int argc, char **argv, char *cmdline)
     }
     
     KernLog("Entrypoint : %p, stack address : %p\n", entryPoint, stackAddr+size);
+        
+    extern void UserTest();
     
-    uchar *code = (uchar*)entryPoint;
-    
-    *code = 0x90;       // nop
-    *(code+1) = 0xEB;   // jmp
-    *(code+2) = 0xFD;   //      short 0x0
+    memmove(entryPoint, UserTest, KPAGESIZE);
 
     KeJumpToUserspace(0, entryPoint, stackAddr+size);
 

kaleid/user/test/test.asm

@@ -29,7 +29,7 @@ global EndOfUser
 
 UserTest:
     mov rdi, 13
-    int 0x80
+    ;int 0x80
 
 .clone:
     nop