rela_write_addend
elf_parser.rela_write_addend = rela32_write_addend;
elf_parser.rela_write_addend = rela64_write_addend;
void (*rela_write_addend)(Elf_Rela *rela, uint64_t val);
elf_parser.rela_write_addend(rela, val);
rela_write_addend(rel, *(uint32_t *)ptr);
rela_write_addend(rel, *(uint64_t *)ptr);