Someone

#include <stdio.h>

int
main(void)
{
        char *x;

        x = (char *)malloc(100);
        strcpy(x, "\x90\x90\x90");

        __asm__("nop");
        if (*x == 0x90)
                printf("true\n");
       __asm__("nop");
       if(*x == '\x90')
                printf("true\n");
       __asm__("nop");
}