elf_getdata
if (elf_getdata(s, NULL) == NULL)
while ((d = elf_getdata(s, d)) != NULL) {
while ((d = elf_getdata(s, d)) != NULL && count <= offset) {
if (e->e_cmd != ELF_C_WRITE && elf_getdata(s, NULL) == NULL)
Elf_Data *elf_getdata(Elf_Scn *, Elf_Data *);