diff options
Diffstat (limited to 'libctf')
| -rw-r--r-- | libctf/ChangeLog | 8 | ||||
| -rw-r--r-- | libctf/ctf-open-bfd.c | 23 |
2 files changed, 22 insertions, 9 deletions
diff --git a/libctf/ChangeLog b/libctf/ChangeLog index 0d55ea0..2324aeb 100644 --- a/libctf/ChangeLog +++ b/libctf/ChangeLog @@ -1,5 +1,13 @@ 2019-06-19 Nick Alcock <nick.alcock@oracle.com> + * ctf-open-bfd.c: Add swap.h and ctf-endian.h. + (ctf_fdopen): Check for endian-swapped raw CTF magic, and + little-endian CTF archive magic. Do not check the CTF version: + ctf_simple_open does that in endian-safe ways. Do not dereference + null pointers on open failure. + +2019-06-19 Nick Alcock <nick.alcock@oracle.com> + * ctf-open.c (get_vbytes_common): Return the new slice size. (ctf_bufopen): Flip the endianness of the CTF-section header copy. Remember to copy in the CTF data when opening an uncompressed diff --git a/libctf/ctf-open-bfd.c b/libctf/ctf-open-bfd.c index 76b7f9d..bb2d7e6 100644 --- a/libctf/ctf-open-bfd.c +++ b/libctf/ctf-open-bfd.c @@ -26,6 +26,8 @@ #include <fcntl.h> #include <elf.h> #include <bfd.h> +#include "swap.h" +#include "ctf-endian.h" #include "elf-bfd.h" @@ -243,24 +245,27 @@ ctf_fdopen (int fd, const char *filename, const char *target, int *errp) if ((nbytes = ctf_pread (fd, &ctfhdr, sizeof (ctfhdr), 0)) <= 0) return (ctf_set_open_errno (errp, nbytes < 0 ? errno : ECTF_FMT)); - /* If we have read enough bytes to form a CTF header and the magic - string matches, attempt to interpret the file as raw CTF. */ + /* If we have read enough bytes to form a CTF header and the magic string + matches, in either endianness, attempt to interpret the file as raw + CTF. */ - if ((size_t) nbytes >= sizeof (ctf_preamble_t) && - ctfhdr.ctp_magic == CTF_MAGIC) + if ((size_t) nbytes >= sizeof (ctf_preamble_t) + && (ctfhdr.ctp_magic == CTF_MAGIC + || ctfhdr.ctp_magic == bswap_16 (CTF_MAGIC))) { ctf_file_t *fp = NULL; void *data; - if (ctfhdr.ctp_version > CTF_VERSION) - return (ctf_set_open_errno (errp, ECTF_CTFVERS)); - if ((data = ctf_mmap (st.st_size, 0, fd)) == NULL) return (ctf_set_open_errno (errp, errno)); if ((fp = ctf_simple_open (data, (size_t) st.st_size, NULL, 0, 0, NULL, 0, errp)) == NULL) - ctf_munmap (data, (size_t) st.st_size); + { + ctf_munmap (data, (size_t) st.st_size); + return NULL; /* errno is set for us. */ + } + fp->ctf_data_mmapped = data; fp->ctf_data_mmapped_len = (size_t) st.st_size; @@ -270,7 +275,7 @@ ctf_fdopen (int fd, const char *filename, const char *target, int *errp) if ((nbytes = ctf_pread (fd, &arc_magic, sizeof (arc_magic), 0)) <= 0) return (ctf_set_open_errno (errp, nbytes < 0 ? errno : ECTF_FMT)); - if ((size_t) nbytes >= sizeof (uint64_t) && arc_magic == CTFA_MAGIC) + if ((size_t) nbytes >= sizeof (uint64_t) && le64toh (arc_magic) == CTFA_MAGIC) { struct ctf_archive *arc; |