gistfile1.txt

struct _va_list {
    unsigned int gp_offset, fp_offset;
    void *overflow_arg_area, *reg_save_area;
};
int foo(int bar, ...) {
    va_list lst;
    va_start(lst, bar);
    struct _va_list *list = &lst;
    int *first = list->reg_save_area+list->gp_offset;
    printf("%d\n", sizeof(int));
    printf("gpofs: %d fpofs: %d\n", list->gp_offset, list->fp_offset);
    printf("arg: %d\n", *first);
    va_end(lst);
    return 0;
}