| Message ID | 20210830173424.1385796-6-memxor@gmail.com (mailing list archive) |
|---|---|
| State | RFC |
| Delegated to: | BPF |
| Headers | show |
| Series | Support kernel module function calls from eBPF | expand |
| Context | Check | Description |
|---|---|---|
| bpf/vmtest-bpf-next | pending | Kernel LATEST + selftests |
| netdev/cover_letter | success | Link |
| netdev/fixes_present | success | Link |
| netdev/patch_count | success | Link |
| netdev/tree_selection | success | Clearly marked for bpf-next |
| netdev/subject_prefix | success | Link |
| netdev/cc_maintainers | warning | 8 maintainers not CCed: jolsa@kernel.org tony.ambardar@gmail.com kpsingh@kernel.org jetswayss@gmail.com sdf@google.com jackmanb@google.com hengqi.chen@gmail.com john.fastabend@gmail.com |
| netdev/source_inline | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Link |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/build_32bit | success | Errors and warnings before: 0 this patch: 0 |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/verify_fixes | success | Link |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 51 lines checked |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 0 this patch: 0 |
| netdev/header_inline | success | Link |
diff --git a/tools/bpf/resolve_btfids/main.c b/tools/bpf/resolve_btfids/main.c index de6365b53c9c..206e1120082f 100644 --- a/tools/bpf/resolve_btfids/main.c +++ b/tools/bpf/resolve_btfids/main.c @@ -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; } @@ -697,6 +710,8 @@ int main(int argc, const char **argv) "BTF data"), OPT_BOOLEAN(0, "no-fail", &no_fail, "do not fail if " BTF_IDS_SECTION " section is not found"), + OPT_STRING('s', "base-btf", &obj.base_btf_path, "file", + "path of file providing base BTF data"), OPT_END() }; int err = -1;
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. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> --- tools/bpf/resolve_btfids/main.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-)