return NULL;
}
+static struct symbol *symbols__first(struct rb_root *symbols)
+{
+ struct rb_node *n = rb_first(symbols);
+
+ if (n)
+ return rb_entry(n, struct symbol, rb_node);
+
+ return NULL;
+}
+
struct symbol_name_rb_node {
struct rb_node rb_node;
struct symbol sym;
return symbols__find(&dso->symbols[type], addr);
}
+struct symbol *dso__first_symbol(struct dso *dso, enum map_type type)
+{
+ return symbols__first(&dso->symbols[type]);
+}
+
struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
const char *name)
{
return kallsyms__parse(filename, &args, map__process_kallsym_symbol);
}
+static int dso__split_kallsyms_for_kcore(struct dso *dso, struct map *map,
+ symbol_filter_t filter)
+{
+ struct map_groups *kmaps = map__kmap(map)->kmaps;
+ struct map *curr_map;
+ struct symbol *pos;
+ int count = 0, moved = 0;
+ struct rb_root *root = &dso->symbols[map->type];
+ struct rb_node *next = rb_first(root);
+
+ while (next) {
+ char *module;
+
+ pos = rb_entry(next, struct symbol, rb_node);
+ next = rb_next(&pos->rb_node);
+
+ module = strchr(pos->name, '\t');
+ if (module)
+ *module = '\0';
+
+ curr_map = map_groups__find(kmaps, map->type, pos->start);
+
+ if (!curr_map || (filter && filter(curr_map, pos))) {
+ rb_erase(&pos->rb_node, root);
+ symbol__delete(pos);
+ } else {
+ pos->start -= curr_map->start - curr_map->pgoff;
+ if (pos->end)
+ pos->end -= curr_map->start - curr_map->pgoff;
+ if (curr_map != map) {
+ rb_erase(&pos->rb_node, root);
+ symbols__insert(
+ &curr_map->dso->symbols[curr_map->type],
+ pos);
+ ++moved;
+ } else {
+ ++count;
+ }
+ }
+ }
+
+ /* Symbols have been adjusted */
+ dso->adjust_symbols = 1;
+
+ return count + moved;
+}
+
/*
* Split the symbols into maps, making sure there are no overlaps, i.e. the
* kernel range is broken in several maps, named [kernel].N, as we don't have
return restricted;
}
+struct kcore_mapfn_data {
+ struct dso *dso;
+ enum map_type type;
+ struct list_head maps;
+};
+
+static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data)
+{
+ struct kcore_mapfn_data *md = data;
+ struct map *map;
+
+ map = map__new2(start, md->dso, md->type);
+ if (map == NULL)
+ return -ENOMEM;
+
+ map->end = map->start + len;
+ map->pgoff = pgoff;
+
+ list_add(&map->node, &md->maps);
+
+ return 0;
+}
+
+/*
+ * If kallsyms is referenced by name then we look for kcore in the same
+ * directory.
+ */
+static bool kcore_filename_from_kallsyms_filename(char *kcore_filename,
+ const char *kallsyms_filename)
+{
+ char *name;
+
+ strcpy(kcore_filename, kallsyms_filename);
+ name = strrchr(kcore_filename, '/');
+ if (!name)
+ return false;
+
+ if (!strcmp(name, "/kallsyms")) {
+ strcpy(name, "/kcore");
+ return true;
+ }
+
+ return false;
+}
+
+static int dso__load_kcore(struct dso *dso, struct map *map,
+ const char *kallsyms_filename)
+{
+ struct map_groups *kmaps = map__kmap(map)->kmaps;
+ struct machine *machine = kmaps->machine;
+ struct kcore_mapfn_data md;
+ struct map *old_map, *new_map, *replacement_map = NULL;
+ bool is_64_bit;
+ int err, fd;
+ char kcore_filename[PATH_MAX];
+ struct symbol *sym;
+
+ /* This function requires that the map is the kernel map */
+ if (map != machine->vmlinux_maps[map->type])
+ return -EINVAL;
+
+ if (!kcore_filename_from_kallsyms_filename(kcore_filename,
+ kallsyms_filename))
+ return -EINVAL;
+
+ md.dso = dso;
+ md.type = map->type;
+ INIT_LIST_HEAD(&md.maps);
+
+ fd = open(kcore_filename, O_RDONLY);
+ if (fd < 0)
+ return -EINVAL;
+
+ /* Read new maps into temporary lists */
+ err = file__read_maps(fd, md.type == MAP__FUNCTION, kcore_mapfn, &md,
+ &is_64_bit);
+ if (err)
+ goto out_err;
+
+ if (list_empty(&md.maps)) {
+ err = -EINVAL;
+ goto out_err;
+ }
+
+ /* Remove old maps */
+ old_map = map_groups__first(kmaps, map->type);
+ while (old_map) {
+ struct map *next = map_groups__next(old_map);
+
+ if (old_map != map)
+ map_groups__remove(kmaps, old_map);
+ old_map = next;
+ }
+
+ /* Find the kernel map using the first symbol */
+ sym = dso__first_symbol(dso, map->type);
+ list_for_each_entry(new_map, &md.maps, node) {
+ if (sym && sym->start >= new_map->start &&
+ sym->start < new_map->end) {
+ replacement_map = new_map;
+ break;
+ }
+ }
+
+ if (!replacement_map)
+ replacement_map = list_entry(md.maps.next, struct map, node);
+
+ /* Add new maps */
+ while (!list_empty(&md.maps)) {
+ new_map = list_entry(md.maps.next, struct map, node);
+ list_del(&new_map->node);
+ if (new_map == replacement_map) {
+ map->start = new_map->start;
+ map->end = new_map->end;
+ map->pgoff = new_map->pgoff;
+ map->map_ip = new_map->map_ip;
+ map->unmap_ip = new_map->unmap_ip;
+ map__delete(new_map);
+ /* Ensure maps are correctly ordered */
+ map_groups__remove(kmaps, map);
+ map_groups__insert(kmaps, map);
+ } else {
+ map_groups__insert(kmaps, new_map);
+ }
+ }
+
+ /*
+ * Set the data type and long name so that kcore can be read via
+ * dso__data_read_addr().
+ */
+ if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
+ dso->data_type = DSO_BINARY_TYPE__GUEST_KCORE;
+ else
+ dso->data_type = DSO_BINARY_TYPE__KCORE;
+ dso__set_long_name(dso, strdup(kcore_filename));
+
+ close(fd);
+
+ if (map->type == MAP__FUNCTION)
+ pr_debug("Using %s for kernel object code\n", kcore_filename);
+ else
+ pr_debug("Using %s for kernel data\n", kcore_filename);
+
+ return 0;
+
+out_err:
+ while (!list_empty(&md.maps)) {
+ map = list_entry(md.maps.next, struct map, node);
+ list_del(&map->node);
+ map__delete(map);
+ }
+ close(fd);
+ return -EINVAL;
+}
+
int dso__load_kallsyms(struct dso *dso, const char *filename,
struct map *map, symbol_filter_t filter)
{
else
dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS;
- return dso__split_kallsyms(dso, map, filter);
+ if (!dso__load_kcore(dso, map, filename))
+ return dso__split_kallsyms_for_kcore(dso, map, filter);
+ else
+ return dso__split_kallsyms(dso, map, filter);
}
static int dso__load_perf_map(struct dso *dso, struct map *map,
pr_debug("Using %s for symbols\n", kallsyms_filename);
free(kallsyms_allocated_filename);
- if (err > 0) {
+ if (err > 0 && !dso__is_kcore(dso)) {
dso__set_long_name(dso, strdup("[kernel.kallsyms]"));
map__fixup_start(map);
map__fixup_end(map);
}
err = dso__load_kallsyms(dso, kallsyms_filename, map, filter);
- if (err > 0) {
+ if (err > 0)
pr_debug("Using %s for symbols\n", kallsyms_filename);
+ if (err > 0 && !dso__is_kcore(dso)) {
machine__mmap_name(machine, path, sizeof(path));
dso__set_long_name(dso, strdup(path));
map__fixup_start(map);
projects / profile / ivi / kernel-x86-ivi.git / commitdiff