On Wed, Jan 04, 2012 at 11:58:15PM +0100, Luigi Rizzo wrote:
> On Wed, Jan 04, 2012 at 02:30:27PM -0800, Garrett Cooper wrote:
> > On Wed, Jan 4, 2012 at 2:29 PM, Luigi Rizzo <ri...@iet.unipi.it> wrote:
> ...
> > >> $ objdump -x `which tar` | awk '$1 == "NEEDED" { print $2 }'
> > >> libarchive.so.5
> > >> libbz2.so.4
> > >> libz.so.6
> > >> liblzma.so.5
> > >> libbsdxml.so.4
> > >> libcrypto.so.6
> > >> libc.so.7> > > wonderful, thanks! > > Np! The only gap with both of these tools is that you have to > > watch out for dl_open'ed binaries as they won't show up in ldd/objdump > > -x. If I could figure out how to detect these with a command line > > tool, I would be set for life :). > and the other thing, i just realized, is that once you locate > the libraries you should run objdump recursively to find > out further dependencies. Perhaps ldd sorts this out by itself ? ldd basically sets LD_TRACE_LOADED_OBJECTS=yes and runs the program (after having checked it is a dynamic executable). This means it will not work as a cross tool. Upsides are that it is simple and it shows exactly what rtld would do (because it is rtld), handling things like /var/run/ld-elf.so.hints, LD_LIBRARY_PATH and pathnames hardcoded into objects. You will have to run objdump (or readelf) recursively. (Note that there are also use cases where just the non-recursive NEEDED tags are appropriate, not all objects that happen to be loaded.) -- Jilles Tjoelker _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
