diff options
Diffstat (limited to 'libctf/ctf-archive.c')
| -rw-r--r-- | libctf/ctf-archive.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/libctf/ctf-archive.c b/libctf/ctf-archive.c index 72cdef9..25c30f6 100644 --- a/libctf/ctf-archive.c +++ b/libctf/ctf-archive.c @@ -377,6 +377,25 @@ ctf_new_archive_internal (int is_archive, int unmap_on_close, return arci; } +/* Get the CTF preamble from data in a buffer, which may be either an archive or + a CTF dict. If multiple dicts are present in an archive, the preamble comes + from an arbitrary dict. The preamble is a pointer into the ctfsect passed + in. */ + +const ctf_preamble_t * +ctf_arc_bufpreamble (const ctf_sect_t *ctfsect) +{ + if (ctfsect->cts_size > sizeof (uint64_t) && + (le64toh ((*(uint64_t *) ctfsect->cts_data)) == CTFA_MAGIC)) + { + struct ctf_archive *arc = (struct ctf_archive *) ctfsect->cts_data; + return (const ctf_preamble_t *) ((char *) arc + le64toh (arc->ctfa_ctfs) + + sizeof (uint64_t)); + } + else + return (const ctf_preamble_t *) ctfsect->cts_data; +} + /* Open a CTF archive or dictionary from data in a buffer (which the caller must preserve until ctf_arc_close() time). Returns the archive, or NULL and an error in *err (if not NULL). */ |