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Diffstat (limited to 'tools/bpf/bpftool/btf.c')
-rw-r--r--tools/bpf/bpftool/btf.c57
1 files changed, 56 insertions, 1 deletions
diff --git a/tools/bpf/bpftool/btf.c b/tools/bpf/bpftool/btf.c
index 9a9376d1d3df..e5bc97b71ceb 100644
--- a/tools/bpf/bpftool/btf.c
+++ b/tools/bpf/bpftool/btf.c
@@ -12,6 +12,9 @@
#include <libbpf.h>
#include <linux/btf.h>
#include <linux/hashtable.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
#include "btf.h"
#include "json_writer.h"
@@ -388,6 +391,54 @@ done:
return err;
}
+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 int do_dump(int argc, char **argv)
{
struct btf *btf = NULL;
@@ -465,7 +516,11 @@ static int do_dump(int argc, char **argv)
}
NEXT_ARG();
} else if (is_prefix(src, "file")) {
- btf = btf__parse_elf(*argv, NULL);
+ if (is_btf_raw(*argv))
+ btf = btf__parse_raw(*argv);
+ else
+ btf = btf__parse_elf(*argv, NULL);
+
if (IS_ERR(btf)) {
err = PTR_ERR(btf);
btf = NULL;