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| author | Matthew Fortune <matthew.fortune@imgtec.com> | 2014-10-01 17:08:51 +0100 |
|---|---|---|
| committer | Matthew Fortune <matthew.fortune@imgtec.com> | 2014-10-31 22:19:23 +0000 |
| commit | d6f373d21b19565838cb9848c15b8070f2fe1305 (patch) | |
| tree | ccbe085a65f298929ae132d09daf1786533a29d0 /elf/dl-load.c | |
| parent | 67c379871ed04c4494f3fb01b012504d6cf63f6e (diff) | |
| download | glibc-d6f373d21b19565838cb9848c15b8070f2fe1305.zip glibc-d6f373d21b19565838cb9848c15b8070f2fe1305.tar.gz glibc-d6f373d21b19565838cb9848c15b8070f2fe1305.tar.bz2 | |
Add a hook to enable load-time inspection of program headers
This hook can be used to perform additional compatibility checks
between shared libraries by inspecting custom program header
information.
* elf/dl-machine-reject-phdr.h: New file.
* elf/dl-load.c: #include that.
(open_verify): Call elf_machine_reject_phdr_p and ignore the file
if that returned true.
Diffstat (limited to 'elf/dl-load.c')
| -rw-r--r-- | elf/dl-load.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/elf/dl-load.c b/elf/dl-load.c index ce5b626..7a03ccf 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -41,6 +41,7 @@ #include <dl-load.h> #include <dl-map-segments.h> #include <dl-unmap-segments.h> +#include <dl-machine-reject-phdr.h> #include <endian.h> @@ -1683,6 +1684,11 @@ open_verify (const char *name, struct filebuf *fbp, struct link_map *loader, } } + if (__glibc_unlikely (elf_machine_reject_phdr_p + (phdr, ehdr->e_phnum, fbp->buf, fbp->len, + loader, fd))) + goto close_and_out; + /* Check .note.ABI-tag if present. */ for (ph = phdr; ph < &phdr[ehdr->e_phnum]; ++ph) if (ph->p_type == PT_NOTE && ph->p_filesz >= 32 && ph->p_align >= 4) |