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2012-06-15ldso: use _dl_strdup and _dl_dprintf only in ld-uClibc.soPeter S. Mazinger
Add support for %p to _dl_dprintf for later corrections in debug messages. Disable _dl_debug_file if LD debugging is not enabled and change it's use to 2. The use of dprintf in elfinterp.c will spit out warnings, will be fixed in the reworked ldso. Signed-off-by: Peter S. Mazinger <ps.m@gmx.net> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2012-06-15ldso/include: change guard of headers to reflect the file names.Peter S. Mazinger
Signed-off-by: Peter S. Mazinger <ps.m@gmx.net> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2012-06-06Clean up DSBT supportMark Salter
The existing DSBT support relies on the kernel to provide DSBT info as part of the load maps passed to user space. The problem with this approach is that the DSBT info is in the dynamic section, so the kernel must access a userspace mapping of the dynamic section (or separately read a copy for the kernel) in order to retrieve the information needed by userspace. This patch reworks the DSBT support to remove the reliance on DSBT info coming from the kernel. Instead, ldso reads the info itself from the dynamic section. One other benefit of this is that it allows the existing kernel FDPIC loader to also load DSBT binaries. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2012-01-02ldso: simplify interp path search logicMike Frysinger
The setup logic is duplicated, so unify it in a local func. Mark the variable const while we're doing this, and add missing ifdef protection to the header that declares it availability. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-11-27ldso: use __func__ rather than __FUNCTION__Mike Frysinger
The former is part of a standard (C99) while the latter is not. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-08-26ldso: add missing includeBernhard Reutner-Fischer
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2011-05-04Merge remote-tracking branch 'origin/master' into prelinkCarmelo Amoroso
* origin/master: (32 commits) libubacktrace: fix backtrace support on arm-eabi, which needs libgcc_eh linked too getaddrinfo.c: fix incorrect check for ERANGE from gethostbyaddr_r getaddrinfo.c: improve code readability. No functional changes string: remove unused variable x86_64: silence warning if !TLS buildsys: prettify ssp.c handling madvise is LINUX_SPECIFIC test_nptl: fix expected result for tst-cputimer[123] test_nptl: fix expected result for tst-clock2 test buildsys: make $(LOCAL_INSTALL_PATH) phony ether_aton: reject invalid input tests: disable ether tests if !HAS_SOCKET inet: add ether_aton testcase sysconf: clock_getres depends on HAS_REALTIME __rt_sigwaitinfo: depends on HAS_REALTIME buildsys: minor fixes in Makefile.arch for C6X buildsys: minor fixes in Makefile.arch for microblaze libubacktrace: enabled for all archs indeed. sparc: don't access fp registers when configured for no fpu libubacktrace: generic implementation based dwarf ... Conflicts: ldso/ldso/dl-elf.c ldso/ldso/mips/elfinterp.c ldso/ldso/x86_64/elfinterp.c Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
2011-04-11Fix nommu handling of DT_TEXTRELBernd Schmidt
We have a problem with DT_TEXTREL shared libraries on nommu machines. The dynamic linker's strategy is to map the text segment read-only first, then look for DT_TEXTREL, and use mprotect to change protections if necessary. This fails on nommu, since a nommu kernel can decide to share the memory for private read-only file mappings, and mprotect doesn't (can't) do anything about this sharing. Existing nommu targets apparently have no need for this, but on C6X, we may need to assign library indices at run-time if no --dsbt-index option was passed to the linker at build time. Hence, the following patch, which instead of using mprotect, redoes the mapping with PF_W set. Signed-off-by: Bernd Schmidt <bernds@codesourcery.com>
2010-09-17ldso: Add support for LD_WARN and LD_TRACE_PRELINKINGFilippo Arcidiacono
Added support for the following tracing capabilities: - LD_WARN to warn about undefined symbols during the lookup stage. - LD_TRACE_PRELINKING to trace the needed libraries of the object that we are prelinking. Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com> Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
2010-09-17ldso: Rework global scope handling and symbol lookup mechanismFilippo Arcidiacono
Global symbol scope is 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. This will help to detect conflict when LD_TRACE_PRELINKING option will be implemented. Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com> Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
2010-09-17ldso: Add implementation of ld.so standalone executionFilippo Arcidiacono
The dynamic linker can be run either indirectly through running some dynamically linked program or library (in which case no command line options to the dynamic linker can be passed and, in the ELF case, the dynamic linker which is stored in the .interp section of the program is executed) or directly by running: /lib/ld-uClibc.so.* [OPTIONS] [PROGRAM [ARGUMENTS]] Stand-alone execution is a prerequisite for adding prelink capabilities to uClibc dynamic linker, as well useful for testing an updated version of the dynamic linker without breaking the whole system. Currently supported option: --library-path PATH use given PATH instead of content of the environment variable LD_LIBRARY_PATH (Mandatory for prelinking) Not supported options: --list list all dependencies and how they are resolved --verify verify that given object really is a dynamically linked object we can handle --inhibit-rpath LIST ignore RUNPATH and RPATH information in object names in LIST This feature can be enabled by setting LDSO_STANDALONE_SUPPORT=y Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com> Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
2010-05-09powerpc: Add TLS and NPTL supportKhem Raj
Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2010-04-28include dlfcn.h in ldso.h to get RTLD_NODELETE definitionAustin Foxley
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
2010-02-11ldso: fix USE_TLS checkAustin Foxley
this was causing tls symbols to leak into non-tls builds Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
2010-02-05ldso: add missing prototypesBernhard Reutner-Fischer
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2009-10-15ldso: clean up breakage in tls mergeMike Frysinger
The TLS merge 534661b91c9849 introduced multiple style problems as well as random breakage: - missing _dl_free - incomplete parametrization of _dl_lookup_hash - restore FDPIC handling in _dl_lookup_hash Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-10-07ldso: pull in missing bits/fcntl.h header for O_CLOEXECMike Frysinger
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-26ldso/: tls support for dynamic linkerAustin Foxley
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
2009-07-20fix building for systems w/out ldso supportMike Frysinger
If an arch (like alpha and others) have no ldso support at all, then there is no point in attempting to walk loaded modules in the dl-* helper funcs. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-12ldso: do not comment out unused variables, just delete it.Carmelo Amoroso
SIgned-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
2009-01-10simple optimizations and style fixes in dynamic loadingDenis Vlasenko
text data bss dec hex filename - 16709 240 92 17041 4291 lib/ld-uClibc.so + 16634 236 92 16962 4242 lib/ld-uClibc.so - 4602 344 4 4950 1356 lib/libdl-0.9.30-svn.so + 4571 328 4 4903 1327 lib/libdl-0.9.30-svn.so - 4602 344 4 4950 1356 lib/libdl.so + 4571 328 4 4903 1327 lib/libdl.so
2008-12-03- Use runtime pagesize (Jeremy Kerr)Bernhard Reutner-Fischer
Some powerpc machines can support 64k pages, enabled by the CONFIG_64K_PAGES option in linux. However, the uClibc dynamic loader won't currently work on these machines, as it uses hard-coded values (PAGE_ALIGN, ADDR_ALIGN and OFFS_ALIGN) in the ldso architecture-specific headers. When running on a kernel with 64k pages, ld.so tries to mmap with 4k-aligned addresses, rather than 64k, so mmap fails with -EINVAL. When booting a 64k machine with a uClibc dynamic linker, init fails with: /init:500: can't map '/lib/libc.so.0' /init:500: can't map '/lib/libc.so.0' /init:500: can't map '/lib/libc.so.0' /init: can't load library 'libc.so.0' Kernel panic - not syncing: Attempted to kill init! This change allows ld.so determine these alignment masks at runtime, rather than compile-time. Since we have the _dl_pagesize variable available, we can use that to generate the appropriate masks. Since almost all of the architectures can use the common definitions for the _ALIGN macros, we can consolidate them all in ldso.h, and override in the sysdep headers where necessary (ie, mips). This allows me to start a uClibc-based root fs on a 64k machine. Signed-off-by: Jeremy Kerr <jk at ozlabs org>
2008-05-30- fix the macros rather than the callees as rightfully noted by bernds (duh!)Bernhard Reutner-Fischer
2008-01-09fix broken whitespace in many places; no functional changesMike Frysinger
2008-01-08Some more Blackfin/FDPIC ldso merging work. Include dl-inlines.h when itBernd Schmidt
exists, and move some definitions to their proper place.
2007-12-03Blackfin FD-PIC patches 5/6.Bernd Schmidt
A couple more target macros for ld.so to deal with FD-PIC support. We need special code to compute the initial got and dpnt, and we need to pass extra arguments to _dl_get_ready_to_run.
2007-12-03Blackfin FD-PIC patch 1/6.Bernd Schmidt
Add a new function _dl_free. In _dl_malloc, ensure we always get back a full page from mmap. Reset _dl_malloc_function and _dl_free_function when libdl is initialized.
2007-11-09Define _dl_assert in libdl only if __DOASSERTS__ is defined. Thanks to Peter ↵Carmelo Amoroso
Mazinger
2007-11-07Added support for GNU hash style into dynamic linkerCarmelo Amoroso
2007-01-29- see if defined foo before trying to look at the value of foo (that should ↵Bernhard Reutner-Fischer
be 0 in this case. Avoids some warnings).
2006-07-05patch from Bernd Schmidt to abstract away load address typesMike Frysinger
2006-07-05missed an ElfW(Addr) changeMike Frysinger
2006-07-05revert fdpic patch so we can merge it in bit by bitMike Frysinger
2006-06-30Bernd Schmidt writes: abstract away addresses so we can support FDPIC ELFsMike Frysinger
2006-02-23Include bits/uClibc_page.h before dl-syscall.h as the latter mayPeter Kjellerstedt
need the defines from the former.
2005-11-23change to Lesser GPL 2.1 as pointed out by psmMike Frysinger
2005-11-22add some copyright infoMike Frysinger
2005-08-29some fixes by anemo in Bug 9 to play nicely with 32 or 64 bit hostsMike Frysinger
2005-08-12Remove hardcoded ld-uClibc.so.0 name in ldso.Joakim Tjernlund
2005-07-11create a new wrapper macro for debug early outputMike Frysinger
2005-06-30change all Elf32_* usage to ElfW(*) usage since we shouldnt care about the ↵Mike Frysinger
bitsize
2005-06-25move _dl_if_debug_dprint() to shared ldso headerMike Frysinger
2005-04-27Get rid of extern references to ldso variables."Steven J. Hill"
2004-09-08Second attempt to fix the INIT/FINI order. This time I think I got it right :)Joakim Tjernlund
This needs testing with apps that have complex dependencies.
2004-09-03First attempt to fix the INIT/FINI ordering. Fingers crossed :)Joakim Tjernlund
2004-09-02Remove unused variables. From Peter Mazinger.Joakim Tjernlund
2004-08-19Remove poor man's malloc. Not needed anymore.Joakim Tjernlund
2004-08-19Move "debug_addr" ptr from dl-startup.c to ldso.cJoakim Tjernlund
2004-08-19Move the app specific stuff from dl-startup.c to ldso.c.Joakim Tjernlund
2004-08-13Fixup PAGE_SIZE problemsEric Andersen
-Erik
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