1 files changed, 47 insertions, 24 deletions

diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 33b7a2aef713..476268c99431 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -74,6 +74,10 @@ static inline uint8_t elf_sym__type(const GElf_Sym *sym)
 	return GELF_ST_TYPE(sym->st_info);
 }
 
+#ifndef STT_GNU_IFUNC
+#define STT_GNU_IFUNC 10
+#endif
+
 static inline int elf_sym__is_function(const GElf_Sym *sym)
 {
 	return (elf_sym__type(sym) == STT_FUNC ||
@@ -575,32 +579,37 @@ static int dso__swap_init(struct dso *dso, unsigned char eidata)
 static int decompress_kmodule(struct dso *dso, const char *name,
 			      enum dso_binary_type type)
 {
-	int fd;
-	const char *ext = strrchr(name, '.');
+	int fd = -1;
 	char tmpbuf[] = "/tmp/perf-kmod-XXXXXX";
+	struct kmod_path m;
 
 	if (type != DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP &&
 	    type != DSO_BINARY_TYPE__GUEST_KMODULE_COMP &&
 	    type != DSO_BINARY_TYPE__BUILD_ID_CACHE)
 		return -1;
 
-	if (!ext || !is_supported_compression(ext + 1)) {
-		ext = strrchr(dso->name, '.');
-		if (!ext || !is_supported_compression(ext + 1))
-			return -1;
-	}
+	if (type == DSO_BINARY_TYPE__BUILD_ID_CACHE)
+		name = dso->long_name;
 
-	fd = mkstemp(tmpbuf);
-	if (fd < 0)
+	if (kmod_path__parse_ext(&m, name) || !m.comp)
 		return -1;
 
-	if (!decompress_to_file(ext + 1, name, fd)) {
+	fd = mkstemp(tmpbuf);
+	if (fd < 0) {
+		dso->load_errno = errno;
+		goto out;
+	}
+
+	if (!decompress_to_file(m.ext, name, fd)) {
+		dso->load_errno = DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE;
 		close(fd);
 		fd = -1;
 	}
 
 	unlink(tmpbuf);
 
+out:
+	free(m.ext);
 	return fd;
 }
 
@@ -629,37 +638,49 @@ int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
 	Elf *elf;
 	int fd;
 
-	if (dso__needs_decompress(dso))
+	if (dso__needs_decompress(dso)) {
 		fd = decompress_kmodule(dso, name, type);
-	else
+		if (fd < 0)
+			return -1;
+	} else {
 		fd = open(name, O_RDONLY);
-
-	if (fd < 0)
-		return -1;
+		if (fd < 0) {
+			dso->load_errno = errno;
+			return -1;
+		}
+	}
 
 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
 	if (elf == NULL) {
 		pr_debug("%s: cannot read %s ELF file.\n", __func__, name);
+		dso->load_errno = DSO_LOAD_ERRNO__INVALID_ELF;
 		goto out_close;
 	}
 
 	if (gelf_getehdr(elf, &ehdr) == NULL) {
+		dso->load_errno = DSO_LOAD_ERRNO__INVALID_ELF;
 		pr_debug("%s: cannot get elf header.\n", __func__);
 		goto out_elf_end;
 	}
 
-	if (dso__swap_init(dso, ehdr.e_ident[EI_DATA]))
+	if (dso__swap_init(dso, ehdr.e_ident[EI_DATA])) {
+		dso->load_errno = DSO_LOAD_ERRNO__INTERNAL_ERROR;
 		goto out_elf_end;
+	}
 
 	/* Always reject images with a mismatched build-id: */
 	if (dso->has_build_id) {
 		u8 build_id[BUILD_ID_SIZE];
 
-		if (elf_read_build_id(elf, build_id, BUILD_ID_SIZE) < 0)
+		if (elf_read_build_id(elf, build_id, BUILD_ID_SIZE) < 0) {
+			dso->load_errno = DSO_LOAD_ERRNO__CANNOT_READ_BUILDID;
 			goto out_elf_end;
+		}
 
-		if (!dso__build_id_equal(dso, build_id))
+		if (!dso__build_id_equal(dso, build_id)) {
+			dso->load_errno = DSO_LOAD_ERRNO__MISMATCHING_BUILDID;
 			goto out_elf_end;
+		}
 	}
 
 	ss->is_64_bit = (gelf_getclass(elf) == ELFCLASS64);
@@ -695,8 +716,10 @@ int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
 	}
 
 	ss->name   = strdup(name);
-	if (!ss->name)
+	if (!ss->name) {
+		dso->load_errno = errno;
 		goto out_elf_end;
+	}
 
 	ss->elf    = elf;
 	ss->fd     = fd;
@@ -864,10 +887,9 @@ int dso__load_sym(struct dso *dso, struct map *map,
 		/* Reject ARM ELF "mapping symbols": these aren't unique and
 		 * don't identify functions, so will confuse the profile
 		 * output: */
-		if (ehdr.e_machine == EM_ARM) {
-			if (!strcmp(elf_name, "$a") ||
-			    !strcmp(elf_name, "$d") ||
-			    !strcmp(elf_name, "$t"))
+		if (ehdr.e_machine == EM_ARM || ehdr.e_machine == EM_AARCH64) {
+			if (elf_name[0] == '$' && strchr("adtx", elf_name[1])
+			    && (elf_name[2] == '\0' || elf_name[2] == '.'))
 				continue;
 		}
 
@@ -1045,7 +1067,8 @@ new_symbol:
 	 * For misannotated, zeroed, ASM function sizes.
 	 */
 	if (nr > 0) {
-		symbols__fixup_duplicate(&dso->symbols[map->type]);
+		if (!symbol_conf.allow_aliases)
+			symbols__fixup_duplicate(&dso->symbols[map->type]);
 		symbols__fixup_end(&dso->symbols[map->type]);
 		if (kmap) {
 			/*