void *extract_elf(int prog_file, char *buffer_base_ptr, unsigned int size){
    Elf64_Ehdr *header = NULL;
    Elf64_Phdr *pheader = NULL;
    Elf64_Shdr *shdr = NULL;
    Elf64_Sym  *syms = NULL;
    char       *strings = NULL;
    char       *start = NULL;
    char       *taddr = NULL;
    void       *entry = NULL;
    int        seg_size;
    int        mem_size;
    int        seg_offset;

    int i = 0;
    char *seg_mem_location = NULL;
    char *bss_mem_location = NULL;
    header = (Elf64_Ehdr *)buffer_base_ptr;

    pheader = (Elf64_Phdr *)(buffer_base_ptr + header->e_phoff);

    for(i=0; i < header->e_phnum; ++i){

        if(pheader[i].p_type != PT_LOAD){
            /*What is an example of a non-loadable program segment?
            Also, what is a program segment?*/
            continue;
        }
        if(pheader[i].p_filesz == 0){
            continue;
        }

        start = buffer_base_ptr + pheader[i].p_offset;
        taddr = pheader[i].p_vaddr;
        seg_size = pheader[i].p_filesz;
        mem_size = pheader[i].p_memsz;
        seg_offset = pheader[i].p_offset;

        char* a_taddr = ELF_PAGESTART((unsigned long long)taddr);
        int addr_diff = (unsigned long long)taddr - (unsigned long long)a_taddr;
        int a_seg_size = ELF_PAGEALIGN(seg_size + addr_diff);
        int a_seg_offset = ELF_PAGEOFFSET(seg_offset);

        int offset_diff = seg_offset - a_seg_offset;