/* mclib.c */

// gcc -c -fpic mclib.c
// gcc -shared -o mclib.so mclib.o

#include <string.h>
#include <sys/mman.h>

typedef unsigned char uchar;

extern uchar run_machine_code(const char *code, uchar a, uchar b, int len) {
    void *buf;
    uchar c;
    /* copy code to executable buffer */
    buf = mmap (0, len, PROT_READ|PROT_WRITE|PROT_EXEC,
                MAP_PRIVATE | MAP_ANON, -1, 0);
    memcpy (buf, code, len);
    /* run code */
    c = ((uchar (*) (uchar, uchar))buf)(a, b);
    /* free buffer */
    munmap (buf, len);
    return c;
}