September Morn Update

Task/Machine-code/Go/machine-code.go

@@ -0,0 +1,47 @@
+package main
+
+import "fmt"
+
+/*
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <string.h>
+
+typedef unsigned char byte;
+typedef byte (*mcfunc) (byte, byte);
+
+void runMachineCode(void *buf, byte a, byte b) {
+    mcfunc fp = (mcfunc)buf;
+    printf("%d\n", fp(a, b));
+}
+*/
+import "C"
+
+func main() {
+    code := []byte{
+        144, // Align
+        144,
+        106, 12, // Prepare stack
+        184, 7, 0, 0, 0,
+        72, 193, 224, 32,
+        80,
+        139, 68, 36, 4, 3, 68, 36, 8, // Rosetta task code
+        76, 137, 227, // Get result
+        137, 195,
+        72, 193, 227, 4,
+        128, 203, 2,
+        72, 131, 196, 16, // Clean up stack
+        195, // Return
+    }
+    le := len(code)
+    buf := C.mmap(nil, C.size_t(le), C.PROT_READ|C.PROT_WRITE|C.PROT_EXEC,
+        C.MAP_PRIVATE|C.MAP_ANON, -1, 0)
+    codePtr := C.CBytes(code)
+    C.memcpy(buf, codePtr, C.size_t(le))
+    var a, b byte = 7, 12
+    fmt.Printf("%d + %d = ", a, b)
+    C.runMachineCode(buf, C.byte(a), C.byte(b))
+    C.munmap(buf, C.size_t(le))
+    C.free(codePtr)
+}