Function main

4.Stackless Stack/public/downloads/stackless_stack.c:193–238

* @brief Main function - challenge entry point */

 * @brief Main function - challenge entry point
 */
int main(int argc, char *argv[]) {
    memory_region_t *memory_region;
    
    // Disable buffering for CTF environment
    setvbuf(stdout, NULL, _IONBF, 0);
    setvbuf(stdin, NULL, _IONBF, 0);
    setvbuf(stderr, NULL, _IONBF, 0);
    
    display_banner();
    setup_environment();
    
    // Allocate memory region using mmap
    memory_region = (memory_region_t *)mmap(
        NULL, 
        MMAP_SIZE,
        PROT_READ | PROT_WRITE,
        MAP_PRIVATE | MAP_ANONYMOUS,
        -1, 
        0
    );
    
    if (memory_region == MAP_FAILED) {
        perror("[-] mmap allocation failed");
        return EXIT_FAILURE;
    }
    
    // Initialize memory region
    memset(memory_region, 0, sizeof(memory_region_t));
    memory_region->callback = process_data;
    memory_region->magic = MAGIC_VALUE;
    
    print_debug_info(memory_region);
    
    // Display hints if requested
    if (argc > 1 && strcmp(argv[1], "--hints") == 0) {
        write(STDOUT_FILENO, HINTS, strlen(HINTS));
    }
    
    // Core vulnerability
    vulnerable_function(memory_region);
    
    write(STDOUT_FILENO, "[👋] Challenge completed - cleaning up...\n", 42);
    cleanup(memory_region);
    
    return EXIT_SUCCESS;
}

/* ===== Compilation Instructions ===== */
/*