-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 9/21/2010 10:28 AM, Carmelo AMOROSO wrote: > On 9/20/2010 10:52 AM, Carmelo AMOROSO wrote: > > On 9/16/2010 11:21 AM, Carmelo AMOROSO wrote: > > > Folks, > > > we are proud to announce the availability of prelink support for uClibc. > > > This work required a big effort from STMicroelectronics uClibc team, > > > especially my colleague Filippo Arcidiacono, and we really would like to > > > upstream. > > > > We have just rebased all of the work with respect to the mainstream, > > > executed the prelink test suite without problem on SH4 arch. > > > > Before including this work into master, I'd like to do a global review > > > with all of you. > > > > We will send the set of patches soon, anyway I'd prefer to create a new > > > *prelink* branch also that everybody can use to play wi.th, and on top > > > of which we can add fixes/enhancements and rework if needed. > > > > Once the prelink review/test is completed, we can easily merge it back > > > to master. > > > > All the work has been re-organised in a small set of patches per > > > functionality, that I'll describe below. > > > > These capabilities are controlled by the two config option, under > > > "General Library Settings" section. > > > > LDSO_STANDALONE_SUPPORT > > > LDSO_PRELINK_SUPPORT (selects LDSO_STANDALONE_SUPPORT) > > > > --- > > > 1. stand-alone mode execution > > > > The prelink tool has to be run on the target system to retrieve > > > information from the application and the shared libraries; to do this it > > > needs to be able to invoke the dynamic linker as a stand-alone > application. > > > Currently only --library-path option is supported (mandatory for > prelinking) > > > Todo: --list, --verify, --inhibit-rpath > > > > 2. full featured tracing capabilities > > > > A new tracing option LD_WARN and LD_TRACE_PRELINKING has been added to > > > provide some extra trace information used by the prelink tool. > > > > 3. global and local symbol scope handling > > > > To support the extended tracing capabilities for prelinking, it was > > > necessary to redesign the lookup process to support searching in the > > > local scope. > > > Global symbol scope is now implemented as a linked list of local scope, > > > that dynamically grows and shrinks when dlopen/dlclose are called. Each > > > local scope is implemented as an array of pointer to struct elf_resolve. > > > > 4. prelinked libraries runtime support > > > > The dynamic linker must check if it is loading a set of prelinked > > > libraries, and must handle any conflicts in symbol resolution that have > > > been detected by the prelink tool using the extended tracing > capabilities. > > > > Folks, > > prelink branch is up. I encourage everybody to give it a try and review. > > > I've sent the patches anyway that can be applied onto master. > > > Carmelo > > > I forgot to mention that currently it only builds fine for SH4. Fixes > for all other archs (elfinterp.c) are coming soon. > No other arch specific changes are required, so I'd expect it should > work fine on all supported archs. > > Regards, > Carmelo >
Folks, prelink branch has been updated to report all the prelink related changes into the specific elfinterp.c file. Any feedback and bugs report are welcome. As a side note, we are going to do some tidy-up into the ld.so, the _dl_find_hash function interface is becoming too confusing, to many parameters used with NULL... likely a better redefinition could be an option. Cheers, Carmelo > > > _______________________________________________ > > uClibc mailing list > > [email protected] > > http://lists.busybox.net/mailman/listinfo/uclibc > > _______________________________________________ > uClibc mailing list > [email protected] > http://lists.busybox.net/mailman/listinfo/uclibc > _______________________________________________ uClibc mailing list [email protected] http://lists.busybox.net/mailman/listinfo/uclibc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkyy8hUACgkQoRq/3BrK1s+h/QCfZCNKG0GmsTaYU2bb5Um1dILF WpQAnRWDLDdY1nR+FooomY2VYxBvm8Qp =OYSl -----END PGP SIGNATURE----- _______________________________________________ uClibc mailing list [email protected] http://lists.busybox.net/mailman/listinfo/uclibc
