char *
symbol_name_lookup_rel(char *data,
                       Elf64_Ehdr *ehdr,
                       Elf64_Shdr *strtabhdr,
                       Elf64_Shdr *symtabhdr,
                       uint64_t addr)
{
    char *strtab = (char *) (data + strtabhdr->sh_offset);
    Elf64_Sym *symtab = (Elf64_Sym *) (data + symtabhdr->sh_offset);
    Elf64_Phdr *phdrtab = (Elf64_Phdr *) (data + ehdr->e_phoff);
    char *s_name = NULL;
    uint64_t s_offset;
    int s_type, s_bind;
    for (size_t i = 0; i < symtabhdr->sh_size / sizeof(Elf64_Sym); i++) {
        s_offset = sym[i].st_value;
        s_type = ELF64_ST_TYPE(sym[i].st_info);
        s_bind = ELF64_ST_BIND(sym[i].st_info);

        if (s_type != STT_FUNC)
            continue;

        Elf64_Phdr phdr;
        for (size_t j = 0; j < ehdr->e_phnum; j++) {
            phdr = phdrtab[j];
            if (phdr.p_type == PT_LOAD) {
                if (s_offset >= phdr.p_vaddr && s_offset < phdr.p_vaddr + phdr.p_memsz)
                    break;
            }
        }

        if (s_offset == addr + phdr.p_vaddr) {
            s_name = str + sym[i].st_name;
            break;
        }
    }

    return s_name;