1 // SPDX-License-Identifier: GPL-2.0
27 	return ((struct ksym *)p1)->addr - ((struct ksym *)p2)->addr;  in ksym_cmp()
42 		return -ENOENT;  in load_kallsyms_refresh()
50 			return -EFBIG;  in load_kallsyms_refresh()
75 	int start = 0, end = sym_cnt;  in ksym_search()  local
82 	while (start < end) {  in ksym_search()
83 		size_t mid = start + (end - start) / 2;  in ksym_search()
85 		result = key - syms[mid].addr;  in ksym_search()
87 			end = mid;  in ksym_search()
94 	if (start >= 1 && syms[start - 1].addr < key &&  in ksym_search()
97 		return &syms[start - 1];  in ksym_search()
127 		return -EINVAL;  in kallsyms_find()
135 	err = -ENOENT;  in kallsyms_find()
157 		sz = read(trace_fd, buf, sizeof(buf) - 1);  in read_trace_pipe()
167 	size_t start, end, base;  in get_uprobe_offset()  local
174 		return -errno;  in get_uprobe_offset()
176 	while (fscanf(f, "%zx-%zx %s %zx %*[^\n]\n", &start, &end, buf, &base) == 4) {  in get_uprobe_offset()
177 		if (buf[2] == 'x' && (uintptr_t)addr >= start && (uintptr_t)addr < end) {  in get_uprobe_offset()
186 		return -ESRCH;  in get_uprobe_offset()
197 	 * point. We need to use the local entry point when patching  in get_uprobe_offset()
198 	 * functions, so identify and step over the global entry point  in get_uprobe_offset()
201 	 * The global entry point sequence is always of the form:  in get_uprobe_offset()
217 			return (uintptr_t)(insn + 2) - start + base;  in get_uprobe_offset()
220 	return (uintptr_t)addr - start + base;  in get_uprobe_offset()
225 	size_t start, end, offset;  in get_rel_offset()  local
231 		return -errno;  in get_rel_offset()
233 	while (fscanf(f, "%zx-%zx %s %zx %*[^\n]\n", &start, &end, buf, &offset) == 4) {  in get_rel_offset()
234 		if (addr >= start && addr < end) {  in get_rel_offset()
236 			return (size_t)addr - start + offset;  in get_rel_offset()
241 	return -EINVAL;  in get_rel_offset()
252 		if (nhdr->n_type == 3 && nhdr->n_namesz == sizeof("GNU") &&  in parse_build_id_buf()
253 		    !strcmp((char *)(nhdr + 1), "GNU") && nhdr->n_descsz > 0 &&  in parse_build_id_buf()
254 		    nhdr->n_descsz <= BPF_BUILD_ID_SIZE) {  in parse_build_id_buf()
256 			       ALIGN(sizeof("GNU"), 4) + sizeof(Elf32_Nhdr), nhdr->n_descsz);  in parse_build_id_buf()
257 			memset(build_id + nhdr->n_descsz, 0, BPF_BUILD_ID_SIZE - nhdr->n_descsz);  in parse_build_id_buf()
258 			return (int) nhdr->n_descsz;  in parse_build_id_buf()
262 			   ALIGN(nhdr->n_namesz, 4) + ALIGN(nhdr->n_descsz, 4);  in parse_build_id_buf()
265 	return -ENOENT;  in parse_build_id_buf()
275 	int fd, err = -EINVAL;  in read_build_id()
281 		return -EINVAL;  in read_build_id()
285 		return -errno;  in read_build_id()
304 		if (phdr->p_type != PT_NOTE)  in read_build_id()
309 		if (phdr->p_offset + phdr->p_memsz > max)  in read_build_id()
311 		err = parse_build_id_buf(data + phdr->p_offset, phdr->p_memsz, build_id);  in read_build_id()