Data commit

Task/Machine-code/Racket/machine-code.rkt

@@ -0,0 +1,23 @@
+#lang racket/base
+
+(require ffi/unsafe)
+
+; set up access to racket internals
+(define scheme-malloc-code
+  (get-ffi-obj 'scheme_malloc_code #f (_fun (len : _intptr) -> _pointer)))
+(define scheme-free-code
+  (get-ffi-obj 'scheme_free_code #f (_fun _pointer -> _void)))
+
+(define opcodes '(139 68 36 4 3 68 36 8 195))
+
+(define code (scheme-malloc-code 64))
+
+(for ([byte opcodes]
+      [i (in-naturals)])
+  (ptr-set! code _ubyte i byte))
+
+(define function (cast code _pointer (_fun _ubyte _ubyte -> _ubyte)))
+
+(function 7 12)
+
+(scheme-free-code code)