This change moves the main implementation of _dl_catch_error,
_dl_signal_error to libc.so, where TLS variables can be used
directly. This removes a writable function pointer from the
rtld_global variable.
For use during initial relocation, minimal implementations of these
functions are provided in ld.so. These are eventually interposed
by the libc.so implementations. This is implemented by compiling
elf/dl-error-skeleton.c twice, via elf/dl-error.c and
elf/dl-error-minimal.c.
As a side effect of this change, the static version of dl-error.c
no longer includes support for the
_dl_signal_cerror/_dl_receive_error mechanism because it is only
used in ld.so.
Resolves: #15465
The program name may be unavailable if the user application tampers
with argc and argv[]. Some parts of the dynamic linker caters for
this while others don't, so this patch consolidates the check and
fallback into a single macro and updates all users.
real malloc in the catch object.
(_dl_catch_error): Forward information about malloc use to caller
in new parameter.
(_dl_out_of_memory): Make static.
* elf/dl-deps.c: Adjust callers of _dl_catch_error.
* elf/dl-libc.c: Likewise.
* elf/dl-open.c: Likewise.
* elf/rtld.c: Likewise.
Add new --audit option.
* sysdeps/generic/ldsodefs.h: Remove _dl_out_of_memory declaration.
(rtld_global_ro._dl_signal_error): Add new parameter.
* include/dlfcn.h (_dl_catch_error): Add new parameter.
* dlfcn/dlfcn.c (_dlerror_run): Pass additional parameter to
_dl_catch_error. Only free if the returned newly value says so.
(_dl_out_of_memory): Use rtld_hidden_proto.
* elf/dl-error.c (_dl_out_of_memory): Use rtld_hidden_data_def.
(_dl_signal_error): Don't use INTUSE on _dl_out_of_memory.
* elf/dl-open.c (_dl_open): Likewise.
* elf/dl-deps.c (_dl_map_object_deps): Likewise.
* sunrpc/des_impl.c (des_set_key): Make first argument unsigned char *.
* elf/dl-addr.c (_dl_addr): Add a cast.
* elf/unload3mod4.c: Declare foo.
* elf/testobj2.c: Include <stdio.h>.
* sysdeps/gnu/errlist.awk: Emit NERR macro for _sys_nerr_internal
value constant, and use it in the defn.
* sysdeps/gnu/errlist-compat.awk: Use NERR in array decl.
Use actual size for compat array decls.
* config.make.in (cc-mtune): New substituted variable.
* configure.in (libc_cv_cc_mtune): New test for -mtune= switch,
done only if libc_mtune_example is defined.
* configure: Regenerated.
* sysdeps/i386/configure.in (libc_mtune_example): Set it.
* sysdeps/i386/configure: Regenerated.
* sysdeps/i386/Makefile (CFLAGS-initfini.s): Use $(cc-mtune).
changed from [USE_TLS && HAVE___THREAD].
* sysdeps/i386/dl-machine.h (elf_machine_type_class, elf_machine_rel):
Disable TLS relocs if [RTLD_BOOTSTRAP && !USE___THREAD].
* sysdeps/x86_64/dl-machine.h
(elf_machine_type_class, elf_machine_rela): Likewise.
* sysdeps/sh/dl-machine.h (elf_machine_type_class, elf_machine_rela):
Likewise.
* include/link.h (struct link_map): Remove member l_tls_tp_initialized.
* elf/rtld.c (_dl_start_final, dl_main): Don't use it.
(_dl_start): Conditionalize PT_TLS check on [USE___THREAD].
* sysdeps/i386/dl-tls.h (__TLS_GET_ADDR): Use ___tls_get_addr_internal
instead of ___tls_get_addr.
(___tls_get_addr_internal): Add attribute_hidden to decl.
* sysdeps/generic/ldsodefs.h (struct rtld_global): New variable
_dl_error_catch_tsd.
* elf/rtld.c (startup_error_tsd): New function.
(dl_main): Point _dl_error_catch_tsd at that.
* elf/dl-error.c: Don't use libc-tsd.h for DL_ERROR,
use new function pointer instead.
* elf/dl-tsd.c: New file.
* elf/Makefile (routines): Add it.
2002-10-07 Roland McGrath <roland@redhat.com>
* elf/dl-misc.c (_dl_debug_vdprintf): Use INTERNAL_SYSCALL macro for
writev if it's available. Otherwise if [RTLD_PRIVATE_ERRNO] then
take _dl_load_lock around calling __writev.
* sysdeps/unix/sysv/linux/i386/sysdep.h (INTERNAL_SYSCALL): New macro.
(INLINE_SYSCALL): Use that.
* sysdeps/generic/dl-sysdep.h: New file.
* sysdeps/mach/hurd/dl-sysdep.h: New file.
* sysdeps/generic/ldsodefs.h: Include <dl-sysdep.h>.
* include/errno.h [IS_IN_rtld]: Include <dl-sysdep.h> to define ...
[RTLD_PRIVATE_ERRNO]: Use a hidden global variable for errno and
access it directly.
* elf/dl-minimal.c (__errno_location): Removed.
* sysdeps/unix/i386/sysdep.S (__syscall_errno) [RTLD_PRIVATE_ERRNO]:
Use GOTOFF access for errno.
* sysdeps/unix/sysv/linux/i386/sysdep.h
[RTLD_PRIVATE_ERRNO] (SYSCALL_ERROR_HANDLER): Likewise.
* sysdeps/unix/x86_64/sysdep.S (__syscall_errno) [RTLD_PRIVATE_ERRNO]:
Use PC-relative access for errno.
* sysdeps/unix/sysv/linux/x86_64/sysdep.h
[RTLD_PRIVATE_ERRNO] (SYSCALL_ERROR_HANDLER): Likewise.
* include/tls.h: New file.
(USE___THREAD): New macro.
Define to 1 under [USE_TLS && HAVE___THREAD] and only when compiling
libc or libpthread.
* sysdeps/unix/sysv/linux/i386/sysdep.h [USE___THREAD]: Conditional
changed from [USE_TLS && HAVE___THREAD].
* sysdeps/unix/sysv/linux/x86_64/sysdep.h: Likewise.
* sysdeps/unix/i386/sysdep.S: Likewise.
* sysdeps/unix/x86_64/sysdep.S: Likewise.
* include/errno.h: Likewise.
* include/netdb.h: Likewise.
* include/resolv.h: Likewise.
* sysdeps/generic/errno.c: New file.
* csu/Makefile (aux): New variable, list errno.
* sysdeps/unix/sysv/linux/i386/sysdep.S (errno, _errno): Remove defns.
* sysdeps/unix/sysv/linux/m68k/sysdep.S: Likewise.
* sysdeps/unix/sysv/linux/x86_64/sysdep.S: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/sysdep.S: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/sysdep.S: Likewise.
* sysdeps/unix/sysv/linux/arm/sysdep.S: Likewise.
* sysdeps/unix/sysv/linux/cris/sysdep.S: Likewise.
* sysdeps/unix/sysv/linux/hppa/sysdep.c: Likewise.
* sysdeps/unix/sysv/linux/ia64/sysdep.S: Likewise.
* sysdeps/unix/sysv/linux/powerpc/sysdep.c: Likewise.
* sysdeps/unix/sysv/linux/sparc/sysdep.S: Likewise.
* sysdeps/unix/sysv/linux/sh/sysdep.S: Likewise.
* sysdeps/unix/alpha/sysdep.S: Likewise.
* sysdeps/generic/start.c: Likewise.
* sysdeps/unix/start.c: Likewise.
* sysdeps/unix/arm/start.c: Likewise.
* sysdeps/unix/bsd/ultrix4/mips/start.S: Likewise.
* sysdeps/unix/sparc/start.c: Likewise.
* sysdeps/unix/sysv/irix4/start.c: Likewise.
* sysdeps/unix/sysv/linux/mips/sysdep.S: File removed.
* manual/search.texi (Tree Search Function, Hash Search Function):
Mention search.h clearly.
2002-10-05 Roland McGrath <roland@redhat.com>
* elf/dl-fxstat64.c: File removed.
* elf/dl-xstat64.c: File removed.
* elf/Makefile (rtld-routines): Remove them.
* sysdeps/unix/sysv/linux/xstat64.c: Remove RTLD_STAT64 conditionals.
Instead, use strong_alias instead of versioned_symbol in the
!SHLIB_COMPAT case.
* sysdeps/unix/sysv/linux/fxstat64.c: Likewise.
* sysdeps/unix/sysv/linux/lxstat64.c: Likewise.
* include/shlib-compat.h
(SHLIB_COMPAT): Require that IS_IN_##lib be defined nonzero.
[! NOT_IN_libc] (IS_IN_libc): Define it.
* cppflags-iterator.mk (CPPFLAGS-$(cpp-src)): Use -Dx=1 not just -Dx.
* elf/Makefile (CPPFLAGS-.os): Likewise.
* sunrpc/rpc_main.c (main): Don't declare with noreturn attribute.
Return the status instead of calling exit.
* Makeconfig (CFLAGS): Prepend -std=gnu99.
* Makerules (+make-deps): Use $(CFLAGS) only for .c sources.
Remove superfluous rm command, whose @ plus make bugs hid
all these commands from the make output.
* include/stubs-prologue.h: New file. Give #error under #ifdef _LIBC.
* Makefile ($(inst_includedir)/gnu/stubs.h): Depend on it.
Use that file's contents instead of literal echo's for the prologue.
* include/features.h: Include <gnu/stubs.h> unconditionally.
* include/gnu/stubs.h: New file.
2002-09-30 Roland McGrath <roland@redhat.com>
* elf/rtld-Rules: New file.
* elf/Makefile ($(objpfx)librtld.map, $(objpfx)librtld.mk,
$(objpfx)rtld-libc.a): New targets.
(generated): Add them.
(reloc-link): Remove -o $@ from the variable.
($(objpfx)dl-allobjs.os): Add -o $@ after $(reloc-link).
(distribute): Add rtld-Rules.
(CPPFLAGS-.os): Define this instead of CFLAGS-.os.
* Makerules ($(+sysdir_pfx)sysd-rules): Emit rules for rtld-% targets.
(common-mostlyclean, common-clean): Clean up rtld-* files.
* sysdeps/unix/make-syscalls.sh: Add rtld-*.os target name to rules.
2002-09-09 Steven Munroe <sjmunroe@us.ibm.com>
* elf/elf.h: Add powerpc64 specific elf relocation and dynamic types.
2002-09-09 Jakub Jelinek <jakub@redhat.com>
* elf/dl-error.c (_dl_signal_cerror): Don't print anything if only
LD_DEBUG=statistics or LD_TRACE_PRELINKING.
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.
2001-05-20 Bruno Haible <haible@clisp.cons.org>
* iconvdata/cp1255.c: Completely rewritten.
* iconvdata/Makefile (gen-8bit-gap-modules): Remove cp1255.
* iconvdata/testdata/WINDOWS-1255: New file.
* iconvdata/testdata/WINDOWS-1255..UTF8: New file.
* iconvdata/TESTS: Add WINDOWS-1255 test.
* iconvdata/CP1255.irreversible: New file.
2001-05-20 Bruno Haible <haible@clisp.cons.org>
* iconvdata/cp1258.c: Completely rewritten.
* iconvdata/Makefile (gen-8bit-gap-modules): Remove cp1258.
* iconvdata/testdata/WINDOWS-1258: New file.
* iconvdata/testdata/WINDOWS-1258..UTF8: New file.
* iconvdata/TESTS: Add WINDOWS-1258 test.
* iconvdata/tst-table-from.c (try): Reset the iconv descriptor before
the main call, and flush it afterwards.
(utf8_decode): Return a string, possibly containing several Unicode
characters.
(main): Update all utf8_decode calls.
* iconvdata/CP1258.irreversible: New file.
2001-05-20 Bruno Haible <haible@clisp.cons.org>
* iconv/gconv.c (__gconv): For flush without output, pass do_flush = 2.
* iconv/skeleton.c: Distinguish do_flush = 1 and do_flush = 2. In the
first case, set outbuf, outstart, outend, and call PREPARE_LOOP before
EMIT_SHIFT_TO_INIT; then pass the output produced by this step down to
the next step. In the second case, clear the state without calling
EMIT_SHIFT_TO_INIT.
* iconvdata/ibm930.c (EMIT_SHIFT_TO_INIT): Use outbuf instead of
data->__outbuf, and outend instead of data->__outbufend.
* iconvdata/ibm933.c (EMIT_SHIFT_TO_INIT): Likewise.
* iconvdata/ibm935.c (EMIT_SHIFT_TO_INIT): Likewise.
* iconvdata/ibm937.c (EMIT_SHIFT_TO_INIT): Likewise.
* iconvdata/ibm939.c (EMIT_SHIFT_TO_INIT): Likewise.
* iconvdata/iso-2022-cn.c (EMIT_SHIFT_TO_INIT): Likewise.
* iconvdata/iso-2022-cn-ext.c (EMIT_SHIFT_TO_INIT): Likewise.
* iconvdata/iso-2022-jp.c (EMIT_SHIFT_TO_INIT): Likewise.
* iconvdata/iso-2022-kr.c (EMIT_SHIFT_TO_INIT): Likewise.
* iconvdata/utf-7.c (EMIT_SHIFT_TO_INIT): Likewise.
2001-05-21 Jakub Jelinek <jakub@redhat.com>
* elf/rtld.c (dl_main): Compute l_map_end for the main program.
* elf/dl-sym.c (_dl_sym): Don't check for l_addr == 0.
If match == _dl_loaded, caller can still come from the main program.
(_dl_vsym): Likewise.
* elf/dl-open.c (dl_open_worker): Don't check for l_addr == 0.
* elf/dl-error.c (_dl_signal_error): Change NULL objname into "".
* elf/restest2.c: New test.
* elf/Makefile (tests): Add restest2.
(restest2, LDFLAGS-restest2): Add rules.
2000-12-08 Jakub Jelinek <jakub@redhat.com>
* elf/dl-open.c (_dl_open): If objname points right after errstring,
allocate it together with errstring using alloca.
* elf/dl-error.c (_dl_signal_error): If malloc failed, set objname
to "", because it might point to local stack.
2000-10-15 Ulrich Drepper <drepper@redhat.com>
* elf/dl-error.c (_dl_signal_error): Allocate memory for objname
as well. Reported by Alexander V. Lukyanov <lav@yars.free.net>.
* elf/Versions (ld): Export _dl_out_of_memory for GLIBC_2.2.
* dlfcn/dlerror.c (dlerror): Don't free the error string if it is the
report that we are out of memory.
* elf/dl-deps.c (_dl_map_object_deps): Likewise.
* elf/dl-libc.c (dlerror_run): Likewise.
* elf/dl-open.c (_dl_open): Likewise.
* elf/rtld.c (dl_main): Likewise.
* elf/dl-error.c: Define _dl_out_of_memory.
(_dl_signal_error): Return _dl_signal_error if we cannot duplicate
the error string.
* sysdeps/generic/ldsodefs.h: Declare _dl_out_of_memory.
* dlfcn/dlerror.c (free_key_mem): Also free error string.
* iconv/loop.c: Fix comment.
1999-08-01 Ulrich Drepper <drepper@cygnus.com>
* elf/dl-sym.c (_dl_sym): Always determine module of the caller to
pass it to _dl_lookup_symbol.
* elf/dl-error.c (_dl_signal_error): Optimize string generation a
bit. Reword message.
* dlfcn/dlerror.c: Make code thread-safe.
1998-11-30 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* nscd/nscd_getpw_r.c: Include nscd_proto.h for prototypes.
* sysdeps/generic/errno-loc.c: Include <errno.h> for prototype,
undefine errno to get variable.
* sysdeps/unix/sysv/linux/i386/setfsuid.c: Include <sys/fsuid.h>
instead of <unistd.h> for prototype.
* sysdeps/unix/sysv/linux/i386/setfsgid.c: Likewise.
1998-11-30 Ulrich Drepper <drepper@cygnus.com>
* misc/err.h: Correct comments and use protected attribute keywords.
Reported by Joseph Myers <jsm28@cam.ac.uk>.
1998-11-29 Roland McGrath <roland@baalperazim.frob.com>
* malloc/thread-m.h [_LIBC]: Include <bits/libc-tsd.h>, and
remove tsd stuff from pthreads/cthreads libc sections.
Use __libc_tsd_define for MALLOC key.
[_LIBC] (tsd_key_t, tsd_key_create): Define to a zero-size type and a
no-op, respectively.
[_LIBC] (tsd_setspecific, tsd_getspecific): Use __libc_tsd_get/set.
* elf/dl-error.c: Include <bits/libc-tsd.h>.
Use __libc_tsd_define for DL_ERROR key.
(tsd_setspecific, tsd_getspecific): Rewritten using __libc_tsd_get/set.
* sysdeps/mach/hurd/bits/libc-tsd.h: New file.
* sysdeps/generic/bits/libc-tsd.h: New file.
* Makefile (distribute): Add bits/libc-tsd.h.
1998-10-12 Roland McGrath <roland@baalperazim.frob.com>
* elf/dl-error.c: Remove kludge to check for ld.so load address.
There is no need if weak undefined symbols are not used in ld.so;
see linuxthreads/ChangeLog for changes to files
linuxthreads/sysdeps/pthread/bits/libc-lock.h and
linuxthreads/sysdeps/pthread/bits/libc-tsd.h.
1998-11-30 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* sysdeps/i386/bits/string.h (__memset_cc): Fix typo (s->__s).
* sysdeps/i386/i486/bits/string.h: Add prototypes for all new
inline functions.
* sysdeps/i386/bits/string.h: Likewise.
1998-11-30 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* sysdeps/unix/sysv/linux/alpha/bits/ipc.h: Remove ipc_kludge.
1998-11-30 Andreas Schwab <schwab@issan.cs.uni-dortmund.de>
* db2/progs/db_load/db_load.c (main): Avoid -Wparentheses warning.
1998-09-22 19:58 -0400 Zack Weinberg <zack@rabi.phys.columbia.edu>
* posix/execvp.c: Don't give up searching the PATH if execve
returns ENOTDIR.
1998-09-22 12:53 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/unix/sysv/linux/init-first.c (init): Don't call setfpucw only
if _dl_fpu_control_set is set.
* sysdeps/generic/dl-sysdep.c: Don't set _dl_fpu_control_set.
* elf/rtld.c: Don't define _dl_fpu_control_set.
* elf/Versions: Remove _dl_fpu_control_set.
1998-09-22 11:51 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/unix/sysv/linux/alpha/bits/sigaction.h (SA_ONSTACK): Define.
* sysdeps/unix/sysv/linux/sparc/bits/sigaction.h: Likewise.
* sysdeps/unix/sysv/linux/mips/bits/sigaction.h: Likewise.
Correct values of other SA_* macros according to kernel headers.
1998-09-22 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* elf/dl-load.c (_dl_init_paths): Avoid warning about unused
variable l.
* elf/dl-error.c (_dl_catch_error): Avoid warning about clobbering
old.
1998-09-21 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* elf/ldsodefs.h: Fix typo in comment.
1998-09-21 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* libio/genops.c (_IO_default_pbackfail): Add cast to unsigned
char when comparing buffer contents with putback character.
1998-09-21 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* elf/Makefile (dl-routines, elide-routines.os, rtld-routines):
Undo last change.
* elf/Versions: Undo last change. Export _dl_fpu_control and
_dl_fpu_control_set.
* elf/rtld.c (_dl_fpu_control, _dl_fpu_control_set): New
variables. Include <fpu_control.h>.
* sysdeps/generic/dl-sysdep.c: Store AT_FPUCW value in
_dl_fpu_control instead of __fpu_control, set _dl_fpu_control_set
to indicate that is was seen.
* sysdeps/unix/sysv/linux/init-first.c: Omit call to __setfpucw
only if _dl_fpu_control was set and is equal to desired value.
* math/Makefile (aux): Undo last change.
* math/Versions: Export __fpu_control with version GLIBC_2.0.
1998-04-14 16:34 Ulrich Drepper <drepper@cygnus.com>
* test-skeleton.c: Provide hook for initializing code before the fork.
* rt/tst-aio.c: Use PREPARE hook to make suer temp files are always
removed.
* libio/fcloseall.c (__fcloseall): Return return value of _IO_cleanup.
* libio/genops.c (_IO_cleanup): Return return value of _IO_flush_all.
* libio/libioP.h: Adopt _IO_cleanup prototype.
* stdlib/Makefile (tests): Add test-canon2.
* stdlib/test-canon2.c: New file.
* stdlib/canonicalize.c (canonicalize): Allow RESOLVED parameter to
be NULL. Use __lxstat, not __lstat. Correctly recognize long
symlink sequences.
(__realpath): Make real function which checks RESOLVED parameter for
not being NULL.
1998-04-14 Ulrich Drepper <drepper@cygnus.com>
* catgets/open_catalog.c (__open_catalog): Fix problems with
reading non-files. Always close file.
Reported by Cristian Gafton <gafton@redhat.com>.
* elf/dl-minimal.c (__strtol_internal): Prevent overflow warnings.
1998-04-14 13:28 Ulrich Drepper <drepper@cygnus.com>
* libc.map: Add various low-level I/O functions.
1998-04-14 10:35 Ulrich Drepper <drepper@cygnus.com>
* string/Makefile (routines): Remove strerror_r.
* string/strerror_r.c: Removed.
* string/strerror.c: Call __strerror_r for doing the real work.
* sysdeps/generic/_strerror.c: Rename function to __strerror_r and
add weak alias strerror_r.
* sysdeps/mach/_strerror.c: Likewise.
* assert/assert-perr.c: Use __strerror_r instead of _strerror_internal.
* elf/dl-error.c (_dl_signal_error): Likewise.
* elf/dl-profile.c (_dl_start_profile): Likewise.
* gmon/gmon.c (write_gmon): Likewise.
* stdio-common/perror.c: Likewise.
* stdio-common/vfprintf.c: Likewise.
1998-04-10 Mark Kettenis <kettenis@phys.uva.nl>
* sysdeps/unix/sysv/linux/Makefile [$(subdir)=inet]
(sysdep_headers): Add netatalk/at.h.
1998-04-12 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* manual/socket.texi, manual/creature.texi, manual/time.texi:
Formatting fixes.
1998-04-13 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* posix/regex.c: Rename __re_syntax_options back to
re_syntax_options, aliases do not work with global variables due
to copy relocations.
(regex_compile): Use syntax parameter instead of
re_syntax_options.
1998-04-14 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* configure.in: Document that enable-force-install is default.
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].
