32bit self-modifying multiplying Intel code.

scode.c

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

typedef int (*func_t)(void);

int main(int argc, char *argv[])
{
    /* push %ebp
       xor %eax, %eax ; zero-out %eax
       xor %ecx, %ecx ; zero-out %ecx
       mov $0x2, %al  ; %al = 2
       mov $0x2, %cl  ; %cl = 2
     */
    char *fstart = "\x55\x89\xe5\x31\xc0\x31\xc9\xb0\x02\xb1\x02";
    /* mul %ecx */
    char *mulecx = "\xf7\xe1";
    /* pop %ebp
       ret */
    char *fend   = "\x5d\xc3";
    int icnt = 5;
    int i;
    char *text = mmap(NULL, 4096, PROT_READ|PROT_WRITE|PROT_EXEC
                                , MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
    if (argv[1]) {
        icnt = atoi(argv[1]);
    }
    strcpy(text, fstart);
    for (i = 0; i < icnt; i++) {
        strcat(text, mulecx);
    }
    strcat(text, fend);
    func_t fn = (func_t)text;
    printf("%d\n", fn());
}