libexec/ld.so/loader.c

516 	struct r_debug **map_link;	/* Where to put pointer for gdb */
678 	map_link = NULL;
682 			map_link = (struct r_debug **)
686 			map_link = (struct r_debug **)
692 	if (map_link == NULL) {
695 				map_link = (struct r_debug **)&dynp->d_un.d_ptr;
702 	if (map_link) {
715 		    ((Elf_Addr)map_link + sizeof(*map_link) <= relro_addr ||
716 		     (Elf_Addr)map_link >= relro_addr + exe_obj->relro_size)) {
717 			_dl_mprotect(map_link, sizeof(*map_link),
719 			*map_link = _dl_debug_map;
720 			_dl_mprotect(map_link, sizeof(*map_link),
724 			*map_link = _dl_debug_map;