Data commit

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

@@ -0,0 +1,38 @@
+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{
+        0x55, 0x48, 0x89, 0xe5, 0x89, 0x7d,
+        0xfc, 0x89, 0x75, 0xf8, 0x8b, 0x75,
+        0xfc, 0x03, 0x75, 0xf8, 0x89, 0x75,
+        0xf4, 0x8b, 0x45, 0xf4, 0x5d, 0xc3,
+    }
+    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)
+}