array_as_code.c

#include <stdio.h>

unsigned char return_number[] __attribute__((section (".text"))) = 
      {0x55, 0x48, 0x89, 0xE5, 0xB8, 255, 255,0,0, 0x5D,0xC3 };

int main()
{
  int (*fn)(void);
  fn = (int(*)(void))&return_number;
  printf("%d\n", (*fn)());
  return 0;
}