Glibc does not provide an interface for debugger to access libraries
loaded in multiple namespaces via dlmopen.
The current rtld-debugger interface is described in the file:
elf/rtld-debugger-interface.txt
under the "Standard debugger interface" heading. This interface only
provides access to the first link-map (LM_ID_BASE).
1. Bump r_version to 2 when multiple namespaces are used. This triggers
the GDB bug:
https://sourceware.org/bugzilla/show_bug.cgi?id=28236
2. Add struct r_debug_extended to extend struct r_debug into a linked-list,
where each element correlates to an unique namespace.
3. Initialize the r_debug_extended structure. Bump r_version to 2 for
the new namespace and add the new namespace to the namespace linked list.
4. Add _dl_debug_update to return the address of struct r_debug' of a
namespace.
5. Add a hidden symbol, _r_debug_extended, for struct r_debug_extended.
6. Provide the symbol, _r_debug, with size of struct r_debug, as an alias
of _r_debug_extended, for programs which reference _r_debug.
This fixes BZ #15971.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
I used these shell commands:
../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")
and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master
* elf/Makefile (tests): Add it.
($(objpfx)tst-tls-dlinfo): Depend on $(libdl).
($(objpfx)tst-tls-dlinfo.out): Depend on $(objpfx)tst-tlsmod2.so.
* dlfcn/dlfcn.h (RTLD_DI_PROFILENAME, RTLD_DI_PROFILEOUT): New enum
values, reserve unsupported requested names used on Solaris.
(RTLD_DI_TLS_MODID, RTLD_DI_TLS_DATA): New enum values.
(RTLD_DI_MAX): Likewise.
* dlfcn/dlinfo.c (dlinfo_doit): Handle RTLD_DI_TLS_MODID and
RTLD_DI_TLS_DATA.
* elf/dl-tls.c (_dl_tls_get_addr_soft): New function.
* sysdeps/generic/ldsodefs.h: Declare it.
* elf/Versions (ld: GLIBC_PRIVATE): Add it.
* elf/link.h (struct dl_phdr_info): New members dlpi_tls_modid,
dlpi_tls_data.
* elf/dl-iteratephdr.c (__dl_iterate_phdr): Fill them in.
* include/link.h: Don't copy contents from elf/link.h.
Instead, #include it while #define'ing around link_map.
* elf/dl-debug.c (_dl_debug_initialize): Add a cast.
Add bogus extern decl to verify link_map members.
* elf/loadtest.c (MAPS): New macro, cast _r_debug._r_map.
(OUT, main): Use it in place of _r_debug._r_map.
* elf/unload.c: Likewise.
* elf/unload2.c: Likewise.
* elf/neededtest.c (check_loaded_objects): Likewise.
* elf/neededtest2.c (check_loaded_objects): Likewise.
* elf/neededtest3.c (check_loaded_objects): Likewise.
* elf/neededtest4.c (check_loaded_objects): Likewise.
* elf/circleload1.c (check_loaded_objects): Likewise.
2001-07-06 Paul Eggert <eggert@twinsun.com>
* manual/argp.texi: Remove ignored LGPL copyright notice; it's
not appropriate for documentation anyway.
* manual/libc-texinfo.sh: "Library General Public License" ->
"Lesser General Public License".
2001-07-06 Andreas Jaeger <aj@suse.de>
* All files under GPL/LGPL version 2: Place under LGPL version
2.1.
2000-04-02 Ulrich Drepper <drepper@redhat.com>
* elf/dl-fini.c (_dl_fini): Increment j counter after swapping in
element at this position.
* elf/Versions [ld.so] (GLIBC_2.2): Export _dl_load_lock.
* elf/link.h (struct link_map): Add l_reldepsmax, l_reldepsact, and
l_reldeps elements.
* elf/dl-lookup.c (add_dependency): New function.
(_dl_lookup_symbol): Use it whenever symbol was found in a global,
dynamically loaded object.
(_dl_lookup_symbol_skip): Likewise.
(_dl_lookup_versioned_symbol): Likewise.
(_dl_lookup_versioned_symbol_skip): Likewise.
* elf/dl-open.c: Don't define _dl_load_lock here...
* elf/rtld.c: ...but here...
* elf/dl-support.c: ...and here.
* elf/dl-close.c (_dl_close): Close also dependent objects introduce
through relocation.
* elf/dl-fini.c (_dl_fini): Also take dependencies introduced through
relocations.
* dlfcn/Makefile (glrefmain.out): Test is not expected to fail
anymore.
* dlfcn/glrefmain.c: Add one more debug message.
* Makeconfig (preprocess-versions): Don't add $(CPPFLAGS) to compiler
command line.
* Makerules (sysd-versions): Use ( ) instead of { }.
* elf/dl-load.c: Use __builtin_expect to signal that compiler should
optimize for the non-debugging case.
* elf/dl-lookup.c: Likewise.
* sysdeps/generic/libc-start.c: Likewise.
2000-03-30 Ulrich Drepper <drepper@redhat.com>
Implement dynamic determination of constructor/destructor order in
the dynamic linker.
* elf/Versions [ld.so] (GLIBC_2.0): Remove _dl_init_next.
(GLIBC_2.2): Add _dl_init.
* elf/dl-close.c: Also call all destructors in FINI_ARRAY.
r_duplist is not anymore allocated separately. l_initfini is and
therefore free it if necessary.
* elf/dl-deps.c: If a searchlist has to be allocated, put all in one
malloc block. Otherwise allocate l_initfini list only.
Put dependencies for the object in l_initfini list.
Sort dependencies for the object to be loaded topologically.
* elf/dl-fini.c: Before running the destructors sort the topologically.
* elf/dl-init.c (_dl_init): Renamed from _dl_init_next. Rewrite to
call constructors instead of iterating over the pointers. Get list of
objects for which to run constructors from l_initfini element. Accept
argc, argv, and env as parameters and pass them to the constructors.
* elf/ld-load.c (_dl_map_object_from_fd): Initialize l_ldnum member
with size of dynamic section.
* elf/dl-open.c (dl_open_worker): Only call _dl_init instead of
_dl_init_next and calling constructors ourself.
* elf/dl-preinit.c (_dl_preinit): Renamed from _dl_preinit_next.
Take argc, argv, and env as parameters and pass them to the
constructors. Rewrite to call all constructors and not iterate over
the pointers.
* elf/dynamic-link.h: Don't relocate DT_FINI_ARRAY entry. Don't
precompute l_initcount and l_preinitcount.
* elf/link.h (struct link_map): Add l_ldnum member.
Make l_phdr_allocated part of the bitfield. Remove l_runcount,
l_initcount, and l_preinitcount. Add l_initfini.
* sysdeps/generic/ldsodefs.h: Replace _dl_init_next prototype with
one for _dl_init.
* sysdeps/i386/dl-machine (RTLD_START): Rewrite to match new init
function interface.
* sysdeps/unix/sysv/linux/init-first.h: Removed.
* sysdeps/unix/sysv/linux/Dist: Delete file here as well.
* sysdeps/unix/sysv/linux/init-first.c [PIC]: Don't use
SYSDEP_CALL_INIT. Make _init a strong alias of init. The calling
conventions now match.
* sysdeps/generic/libc-start.c: Calling __libc_init_first has no
effect for shared objects. Don't emit message and call only for
static library.
1999-07-24 Ulrich Drepper <drepper@cygnus.com>
* elf/dl-fini.c: Handle DT_FINI_ARRAY.
* elf/link.h (struct link_map): Remove l_init_running. Add l_runcount
and l_initcount.
* elf/dl-init.c: Handle DT_INIT_ARRAY.
* elf/dynamic-link.h: Change parameters. Now only get link_map
pointer. Calculate l_initcount.
* elf/link.h (struct link_map): Add l_runpath_dirs.
* elf/dynamic-link.h: If RUNPATH is given, set RPATH to NULL.
* elf/dl-load.c: Pretty print.
(decompose_rpath): Take new parameter with info from where the path
comes. Pass it the fillin_rpath.
(_dl_init_paths): Initialize l_runpath_dirs.
(_dl_map_object): Don't search using RPATHs if object has RUNPATH.
Search using RUNPATH after LD_LIBRARY_PATH.
* elf/dl-support.c: Adjust comment.
* elf/rtld.c: Adjust help message.
* elf/link.h (struct link_map): New field l_phdr_allocated.
* elf/dl-load.c (_dl_map_object_from_fd): Don't depend on having
the program header being part of any loaded segment. If it is not
allocate memory and set l_phdr_allocated flag.
* elf/dl-close.c (_dl_close): Free l_phdr if necessary.
* elf/link.h (link_map): Add l_dev and l_ino.
* elf/dl-load.c (_dl_map_object_from_fd): Test dev/ino of newly
loaded shared object with all laoded objects. Initialize l_ino
and l_dev in case it's new.
* elf/rtld.c (dl_main): Explain situation is l_dev/l_ino with main
object.
* elf/Makefile: Compile and run new test.
* elf/multiload.c: New file.
1998-08-09 Geoff Keating <geoffk@ozemail.com.au>
* sysdeps/powerpc/Makefile [subdir=elf]: Add new files split out of
dl-machine.h.
* sysdeps/powerpc/dl-machine.c: New file.
* sysdeps/powerpc/dl-machine.h: Move much stuff into separate
files. Revise ELF_PREFERRED_ADDRESS to take account of
the new mapping information (fixes bug involving huge bloated
web browser). Set ELF_MACHINE_PLTREL_OVERLAP.
* sysdeps/powerpc/dl-start.S: New file.
* elf/dl-load.c (_dl_map_object_from_fd): Initialise l_map_start,
l_map_end.
* elf/do-rel.h: Call elf_machine_rel only once (to save space).
* elf/dynamic-link.h: Allow PLT relocs to be in the middle of the
others. Call elf_dynamic_do_##reloc only once (to save even more
space).
* elf/link.h: Add new members l_map_start and l_map_end to keep
track of the memory map.
* elf/rtld.c (_dl_start): Initialise l_map_start for ld.so and
the executable.
1998-09-01 11:53 Ulrich Drepper <drepper@cygnus.com>
* debug/Makefile (catchsegv): We need not rewrite SOVER anymore.
Reported by Andreas Jaeger.
* posix/glob.h: Use __size_t instead of size_t in definitions and
make sure this is defined.
* manual/locale.texi: Almost complete rewrite. Document more functions
1998-08-27 19:42 Ulrich Drepper <drepper@cygnus.com>
* elf/Makefile (distribute): Add dl-origin.h.
* sysdeps/generic/dl-origin.h: New file.
* sysdeps/unix/sysv/linux/dl-origin.h: New file.
* elf/link.h (struct link_map): Add l_origin field.
* elf/dl-load.c (expand_dynamic_string_token): New function.
(decompose_path): Remove WHERE argument, take link map pointer instead.
Call expand_dynamic_string_token instead of local_strdup to make copy
of rpath.
(_dl_init_paths): Call decompose_path with correct argument.
(_dl_map_object_from_fd): Define static is EXTERNAL_MAP_FROM_FD is
not defined.
Check EI_OSABI and EI_ABIVERSION fields in header.
(_dl_map_object): Call decompose_path with correct argument.
Call expand_dynamic_string_token instead of local_strdup to also
expand DST.
* elf/dl-object.c (_dl_new_object): Determine l_origin for all maps
but the main one.
* elf/dl-support.c: Define _dl_origin_path.
* elf/rtld.c: Likewise. Set _dl_origin_path based on LD_ORIGIN_PATH.
* elf/dl-close (_dl_close): Free l_name and l_origin.
* sysdeps/i386/useldt.h (THREAD_GETMEM, THREAD_SETMEM): Use P
modifier in asm, not c.
* sysdeps/mach/hurd/Makefile [subdirs==elf]: Define CFLAGS-dl-load.c
to -DEXTERNAL_MAP_FROM_FD to make _dl_map_object_from_fd extern.
1998-03-12 13:11 Tim Waugh <tim@cyberelk.demon.co.uk>
* posix/wordexp-test.c: More tests.
(main): Set up arena for pathname expansion tests (in a temporary
directory).
(testit): Don't check word count or word vector if return value is
non-zero.
* posix/wordexp.c (exec_comm): Always chop off terminating
linefeed (just like bash does).
(parse_param): Change lots of occurrences of "if (!*env)" to "if
(!env || !*env)".
(parse_param): For assignment inside parameter expansion, use all
expanded words in assignment rather than just the first.
(parse_param): Corrected return value for parameter expansion of
an unset variable when WRDE_UNDEF is in effect.
(parse_dollars): Don't field-split if quoted.
(wordexp): Opening brace character isn't allowed unquoted.
1998-03-12 Ulrich Drepper <drepper@cygnus.com>
* elf/dlerror.c: Fix concurrency problems with error string and
number.
* elf/dl-deps.c (_dl_map_object_deps): Print debug info when
filter/auxiliary are being loaded.
1998-03-12 14:24 Ulrich Drepper <drepper@cygnus.com>
* elf/dlerror.c (last_object_name): Removed.
(dlerror): Don't use last_object_name.
(_dl_error_run): Omit second argument to _dl_catch_error.
* elf/dl-error.c (struct catch): Remove objname member.
(_dl_signal_error): Construct string including objname when given.
(_dl_catch_error): Remove objname handling.
* elf/link.h (_dl_catch_error): Fix prototype and comment.
* elf/rtld.c (dl_main): Call _dl_catch_error correctly.
* elf/dl-deps.c (_dl_map_objet_deps): Likewise.
* nss/nsswitch.c (nss_dlerror_run): Likewise.
* iconv/gconv_dl.c (dlerror_run): Likewise.
[Corrects PR libc/501].
1998-03-10 17:54 Ulrich Drepper <drepper@cygnus.com>
* libc.map: Add _dl_debug_message.
* elf/dl-misc.c: Make _dl_debug_message a function. Print the PID
before every line.
* elf/fini.c: Correctly use new _dl_debug_message function.
* elf/init.c: Likewise.
* elf/dl-lookup.c: Likewise.
* sysdeps/unix/sysv/linux/libc-start.c: Likewise.
* elf/dl-load.c: Likewise. Add more debugging prints.
* elf/dl-reloc.c: Likewise.
* elf/dl-version.c: Likewise.
* elf/dl-support.c: Add variables for debugging.
* elf/rtld.c: Likewise. Recognize new debug options.
* elf/link.h: Declare new variables.
* elf/dl-deps.c (_dl_map_object_deps): Little optimizations.
* sysdeps/unix/sysv/linux/sys/quota.h: Extract information from
kernel headers. Patch by a sun <asun@saul7.u.washington.edu>.
1998-03-11 00:16 Tim Waugh <tim@cyberelk.demon.co.uk>
* posix/wordexp-test.c (command_line_test): New function to allow
testing of specific cases from the command-line.
1998-03-10 Ulrich Drepper <drepper@cygnus.com>
* elf/dl-init.c (_dl_init_next): Print nicer messages.
* elf/dl-fini.c (_dl_fini): Likewise.
* sysdeps/unix/sysv/linux/libc-start.c (__libc_start_main): Likewise.
1998-03-06 17:04 Ulrich Drepper <drepper@cygnus.com>
* libc.map: Add _dl_debug_impcalls, _dl_debug_fd, _dl_sysdep_output,
__libc_start_main.
* csu/Makefile (routines): Add libc-start.
* elf/dl-error.c: Remove declaration of _dl_argv. Include <unitsd.h>.
* elf/dl-lookup.c: Likewise.
* elf/dl-version.c: Likewise.
* sysdeps/i386/dl-machine.h: Likewise.
* elf/link.h: Declare _dl_argv, _dl_debug_fd.
Declare _dl_sysdep_output. Make _dl_sysdep_fatal, _dl_sysdep_error and
_dl_sysdep_message macros which use _dl_sysdep_output.
* elf/dl-fini.c: Write out which destructor is called while debugging.
* elf/dl-init.c: Likewise for constructor.
* elf/dl-load.c: Use _dl_debug_message instead of _dl_sysdep_message.
* elf/dl-misc.c: Remove _dl_sysdep_fatal, _dl_sysdep_error and
_dl_sysdep_message. Add _dl_sysdep_output.
* elf/rtld.c: Recognize LD_DEBUG_OUTPUT. Set _dl_debug_fd if
this file can be opened.
For LD_DEBUG=libs also set _dl_debug_impcalls.
* sysdeps/generic/dl-cache.c: Include unistd.h.
* sysdeps/generic/libc-start.c: New file.
* sysdeps/i386/elf/start.S: Don't call main directly, call
* sysdeps/unix/sysv/linux/libc-start.c: New file.
__libc_start_main instead.
* elf/Makefile ($(objpfx)ld.so): Add $(load-map-file) as dependency.
