68  * .note.stapsdt ELF section. Here's an example USDT definition as emitted by
158  * Note that libbpf is using BPF cookie functionality for its own internal
161  * user-provided value that can be associated with USDT attachment. Note that
178  * note) as a lookup key in a hashmap. USDT spec string uniquely defines
181  * Note, this spec string deduplication is happening only during the same USDT
193 #define USDT_NOTE_SEC  ".note.stapsdt"
576 static int parse_usdt_spec(struct usdt_spec *spec, const struct usdt_note *note, __u64 usdt_cookie);
623 		struct usdt_note note;  in collect_usdt_targets()  local
627 		err = parse_usdt_note(elf, path, &nhdr, data->d_buf, name_off, desc_off, &note);  in collect_usdt_targets()
631 		if (strcmp(note.provider, usdt_provider) != 0 || strcmp(note.name, usdt_name) != 0)  in collect_usdt_targets()
637 		 * Each SDT probe also expands into a non-allocated ELF note. You can  in collect_usdt_targets()
639 		 * see below for details. Because the note is non-allocated, it means  in collect_usdt_targets()
643 		 * However, this means that prelink won't adjust the note's contents  in collect_usdt_targets()
651 		 * Each probe note records the link-time address of the .stapsdt.base  in collect_usdt_targets()
653 		 * base address stored in the note with the .stapsdt.base section's  in collect_usdt_targets()
661 		usdt_abs_ip = note.loc_addr;  in collect_usdt_targets()
663 			usdt_abs_ip += base_addr - note.base_addr;  in collect_usdt_targets()
730 			 note.loc_addr, note.base_addr, usdt_abs_ip, usdt_rel_ip, note.args,  in collect_usdt_targets()
734 		if (note.sema_addr) {  in collect_usdt_targets()
742 			seg = find_elf_seg(segs, seg_cnt, note.sema_addr);  in collect_usdt_targets()
746 					usdt_provider, usdt_name, path, note.sema_addr);  in collect_usdt_targets()
753 					note.sema_addr);  in collect_usdt_targets()
757 			usdt_sema_off = note.sema_addr - seg->start + seg->offset;  in collect_usdt_targets()
761 				 path, note.sema_addr, note.base_addr, usdt_sema_off,  in collect_usdt_targets()
783 		target->spec_str = note.args;  in collect_usdt_targets()
785 		err = parse_usdt_spec(&target->spec, &note, usdt_cookie);  in collect_usdt_targets()
1130 /* Parse out USDT ELF note from '.note.stapsdt' section.
1135 			   struct usdt_note *note)  in parse_usdt_note()  argument
1141 	/* sanity check USDT note name and type first */  in parse_usdt_note()
1147 	/* sanity check USDT note contents ("description" in ELF terminology) */  in parse_usdt_note()
1175 	note->provider = provider;  in parse_usdt_note()
1176 	note->name = name;  in parse_usdt_note()
1178 		note->args = "";  in parse_usdt_note()
1180 		note->args = args;  in parse_usdt_note()
1181 	note->loc_addr = addrs[0];  in parse_usdt_note()
1182 	note->base_addr = addrs[1];  in parse_usdt_note()
1183 	note->sema_addr = addrs[2];  in parse_usdt_note()
1190 static int parse_usdt_spec(struct usdt_spec *spec, const struct usdt_note *note, __u64 usdt_cookie)  in parse_usdt_spec()  argument
1199 	s = note->args;  in parse_usdt_spec()
1203 				USDT_MAX_ARG_CNT, note->provider, note->name, note->args);  in parse_usdt_spec()