@@ -89,6 +89,7 @@ struct btf_id {
struct object {
const char *path;
const char *btf;
+ const char *base_btf_path;
struct {
int fd;
@@ -477,16 +478,27 @@ static int symbols_resolve(struct object *obj)
int nr_structs = obj->nr_structs;
int nr_unions = obj->nr_unions;
int nr_funcs = obj->nr_funcs;
+ struct btf *base_btf = NULL;
int err, type_id;
struct btf *btf;
__u32 nr_types;
- btf = btf__parse(obj->btf ?: obj->path, NULL);
+ if (obj->base_btf_path) {
+ base_btf = btf__parse(obj->base_btf_path, NULL);
+ err = libbpf_get_error(base_btf);
+ if (err) {
+ pr_err("FAILED: load base BTF from %s: %s\n",
+ obj->base_btf_path, strerror(-err));
+ return -1;
+ }
+ }
+
+ btf = btf__parse_split(obj->btf ?: obj->path, base_btf);
err = libbpf_get_error(btf);
if (err) {
pr_err("FAILED: load BTF from %s: %s\n",
obj->btf ?: obj->path, strerror(-err));
- return -1;
+ goto out;
}
err = -1;
@@ -545,6 +557,7 @@ static int symbols_resolve(struct object *obj)
err = 0;
out:
+ btf__free(base_btf);
btf__free(btf);
return err;
}
@@ -678,7 +691,6 @@ static const char * const resolve_btfids_usage[] = {
int main(int argc, const char **argv)
{
- bool no_fail = false;
struct object obj = {
.efile = {
.idlist_shndx = -1,
@@ -695,8 +707,8 @@ int main(int argc, const char **argv)
"be more verbose (show errors, etc)"),
OPT_STRING(0, "btf", &obj.btf, "BTF data",
"BTF data"),
- OPT_BOOLEAN(0, "no-fail", &no_fail,
- "do not fail if " BTF_IDS_SECTION " section is not found"),
+ OPT_STRING('b', "btf_base", &obj.base_btf_path, "file",
+ "path of file providing base BTF"),
OPT_END()
};
int err = -1;
@@ -717,10 +729,8 @@ int main(int argc, const char **argv)
*/
if (obj.efile.idlist_shndx == -1 ||
obj.efile.symbols_shndx == -1) {
- if (no_fail)
- return 0;
- pr_err("FAILED to find needed sections\n");
- return -1;
+ pr_debug("Cannot find .BTF_ids or symbols sections, nothing to do\n");
+ return 0;
}
if (symbols_collect(&obj))
@@ -453,7 +453,7 @@ $(OUTPUT)/$(TRUNNER_BINARY): $(TRUNNER_TEST_OBJS) \
| $(TRUNNER_BINARY)-extras
$$(call msg,BINARY,,$$@)
$(Q)$$(CC) $$(CFLAGS) $$(filter %.a %.o,$$^) $$(LDLIBS) -o $$@
- $(Q)$(RESOLVE_BTFIDS) --no-fail --btf $(TRUNNER_OUTPUT)/btf_data.o $$@
+ $(Q)$(RESOLVE_BTFIDS) --btf $(TRUNNER_OUTPUT)/btf_data.o $$@
endef
This commits allows specifying the base BTF for resolving btf id lists/sets during link time in the resolve_btfids tool. The base BTF is set to NULL if no path is passed. This allows resolving BTF ids for module kernel objects. Also, drop the --no-fail option, as it is only used in case .BTF_ids section is not present, instead make no-fail the default mode. The long option name is same as that of pahole. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> --- tools/bpf/resolve_btfids/main.c | 28 +++++++++++++++++++--------- tools/testing/selftests/bpf/Makefile | 2 +- 2 files changed, 20 insertions(+), 10 deletions(-)