diff options
author | Andrii Nakryiko <andriin@fb.com> | 2020-08-02 03:32:19 +0200 |
---|---|---|
committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-08-03 16:39:48 +0200 |
commit | f86ca3cffef153555a3f4755b3a44881d962754f (patch) | |
tree | 6a78a898df8a336f40e0be88bc95bf1eaffea155 /tools/bpf | |
parent | tools/bpftool: Use libbpf's btf__parse() API for parsing BTF from file (diff) | |
download | linux-f86ca3cffef153555a3f4755b3a44881d962754f.tar.xz linux-f86ca3cffef153555a3f4755b3a44881d962754f.zip |
tools/resolve_btfids: Use libbpf's btf__parse() API
Instead of re-implementing generic BTF parsing logic, use libbpf's API.
Also add .gitignore for resolve_btfids's build artifacts.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200802013219.864880-4-andriin@fb.com
Diffstat (limited to 'tools/bpf')
-rw-r--r-- | tools/bpf/resolve_btfids/.gitignore | 4 | ||||
-rw-r--r-- | tools/bpf/resolve_btfids/main.c | 58 |
2 files changed, 5 insertions, 57 deletions
diff --git a/tools/bpf/resolve_btfids/.gitignore b/tools/bpf/resolve_btfids/.gitignore new file mode 100644 index 000000000000..a026df7dc280 --- /dev/null +++ b/tools/bpf/resolve_btfids/.gitignore @@ -0,0 +1,4 @@ +/FEATURE-DUMP.libbpf +/bpf_helper_defs.h +/fixdep +/resolve_btfids diff --git a/tools/bpf/resolve_btfids/main.c b/tools/bpf/resolve_btfids/main.c index 6956b6350cad..52d883325a23 100644 --- a/tools/bpf/resolve_btfids/main.c +++ b/tools/bpf/resolve_btfids/main.c @@ -403,62 +403,6 @@ static int symbols_collect(struct object *obj) return 0; } -static struct btf *btf__parse_raw(const char *file) -{ - struct btf *btf; - struct stat st; - __u8 *buf; - FILE *f; - - if (stat(file, &st)) - return NULL; - - f = fopen(file, "rb"); - if (!f) - return NULL; - - buf = malloc(st.st_size); - if (!buf) { - btf = ERR_PTR(-ENOMEM); - goto exit_close; - } - - if ((size_t) st.st_size != fread(buf, 1, st.st_size, f)) { - btf = ERR_PTR(-EINVAL); - goto exit_free; - } - - btf = btf__new(buf, st.st_size); - -exit_free: - free(buf); -exit_close: - fclose(f); - return btf; -} - -static bool is_btf_raw(const char *file) -{ - __u16 magic = 0; - int fd, nb_read; - - fd = open(file, O_RDONLY); - if (fd < 0) - return false; - - nb_read = read(fd, &magic, sizeof(magic)); - close(fd); - return nb_read == sizeof(magic) && magic == BTF_MAGIC; -} - -static struct btf *btf_open(const char *path) -{ - if (is_btf_raw(path)) - return btf__parse_raw(path); - else - return btf__parse_elf(path, NULL); -} - static int symbols_resolve(struct object *obj) { int nr_typedefs = obj->nr_typedefs; @@ -469,7 +413,7 @@ static int symbols_resolve(struct object *obj) struct btf *btf; __u32 nr; - btf = btf_open(obj->btf ?: obj->path); + btf = btf__parse(obj->btf ?: obj->path, NULL); err = libbpf_get_error(btf); if (err) { pr_err("FAILED: load BTF from %s: %s", |