* locale/error.c, locale/error.h: Files removed.
* locale/Makefile (distribute): Remove error.h.
(lib-modules): Remove error.
* hurd/hurdlookup.c (__hurd_file_name_lookup_retry): For "tty"
magic, return ENXIO if no ctty.
* sysdeps/mach/hurd/mmap.c: For MAP_FIXED, deallocate a previous
mapping if vm_map fails for that reason.
* posix/glob.c: Implement new options GLOB_ALTDIRFUNC, GLOB_BRACE,
GLOB_TILDE, GLOB_NOMAGIC.
(glob): Use stat instead of lstat to determine directoriness.
* posix/glob.h (GLOB_ALTDIRFUNC, GLOB_BRACE, GLOB_NOMAGIC, GLOB_TILDE):
New flag bits.
(__GLOB_FLAGS): Include them.
(glob_t): New members gl_closedir, gl_readdir, gl_opendir, gl_lstat,
gl_stat.
* elf/elf.h (ET_NUM, SHT_NUM, STB_NUM, STT_NUM, PT_NUM): New macros.
* sysdeps/unix/sysv/linux/sys/mman.h: Include <linux/mman.h> to
define all the bit values.
(MAP_*, MCL_*): Macros removed.
* malloc/malloc.c (align): Don't check contiguity and call abort.
* hurd/hurdsig.c (post_reply): Function removed.
(abort_thread, abort_all_rpcs, _hurdsig_abort_rpcs): Don't call it.
Take single callback fn arg instead of reply port and type.
(_hurd_internal_post_signal): Callers changed.
Cache reply stub fn ptr in local var before UNTRACED might be changed.
* sysdeps/mach/hurd/mmap.c: Cope with a null write memobj for
PROT_READ|PROT_WRITE copy mapping. Pass a proper vm_inherit_t to
vm_map.
* elf/rtld.c (_dl_start): For --list, do output and exit before
relocating.
* hurd/hurdsig.c (_hurd_internal_post_signal): For SIGNO == 0,
skip straight to pending check. When UNTRACED, resume process
from suspension first.
* intl/Makefile (headers): New variable, libintl.h.
[gettext-srcdir]: New rules to copy source from $(gettext-srcdir)/intl.
* configure.in: Check for --with-gettext arg.
Fri Nov 10 13:51:30 1995 Richard Stallman <rms@gnu.ai.mit.edu>
* malloc/malloc.c (get_contiguous_space): New function.
(morecore): Rewrite allocating new malloc info table.
(_malloc_internal): Use get_contiguous_space.
Fri Nov 10 13:03:40 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* hurd/hurdexec.c (_hurd_exec): If exec'ing self, pass
_hurd_msgport to be destroyed.
* Makerules (installed-libcs): Filter out %_pic.a.
* hurd/hurdinit.c (_hurd_proc_init): When traced, use msg_sig_post
to our msgport to take SIGTRAP, instead of _hurd_raise_signal.
* hurd/Makefile (user-interfaces): Add hurd/process_request.
PI_FETCH_TASKINFO to proc_getprocinfo and through
_hurd_priority_which_map.
* sysdeps/mach/hurd/setpriority.c (setpriority): Pass new arg to
_hurd_priority_which_map.
* hurd/hurdprio.c (_hurd_priority_which_map): New arg PI_FLAGS,
passed through to proc_getprocinfo RPC.
* hurd/hurd/resource.h: Add PI_FLAGS arg in decl.
New macro.
(PSEUDO): Use it instead of SYSCALL_PIC_SETUP and jmp syscall_error.
* sysdeps/unix/sysv/linux/i386/sysdep.S (__syscall_error): Define
only #ifndef PIC.
* Makeconfig (built-program-cmd): New variable.
* sunrpc/Makefile (rpcgen-cmd): Use $(built-program-cmd).
* time/Makefile (zic-cmd): Likewise.
* hurd/Makefile (user-interfaces): Add hurd/exec_startup.
* sysdeps/generic/_strerror.c: Declare _sys_errlist and _sys_nerr.
* hurd/hurdlookup.c (__hurd_file_name_lookup_retry): For magic
`fd/', pass the right pointer to strtol to parse the number.
* sysdeps/mach/hurd/getcwd.c: Use __file_name_lookup_under.
* sysdeps/mach/hurd/bind.c: Likewise.
* sysdeps/mach/hurd/access.c: Use new __hurd_file_name_lookup
calling convention.
* hurd/hurdexec.c: Undo last change (10 Oct 95).
* hurd/hurdlookup.c (__file_name_lookup_under): New function.
(__hurd_file_name_lookup, __hurd_file_name_lookup_retry,
__hurd_file_name_split): Rewritten to take callback functions for
using any needed init or dtable port, instead of passing in crdir
and cwdir ports.
(__file_name_lookup, __file_name_split): Use new calling
convention; pass _hurd_ports_use and __getdport as the callback
functions.
* sysdeps/mach/hurd/chroot.c: Use __file_name_lookup_under instead
of __hurd_file_name_lookup.
* sysdeps/mach/hurd/chdir.c: Likewise.
* sysdeps/mach/hurd/fchdir.c: Likewise.
* hurd/fchroot.c: Likewise.
* malloc/malloc.c (_malloc_internal): Performance fix. Move
if statement out of loop.
* stdio/_itoa.c, stdio/_itoa.h: Complete rewrite. Much faster
implementation using GMP functions. Contributed by
Torbjorn Granlund and Ulrich Drepper.
* stdio/test_rdwr.c: Include <errno.h>.
* sysdeps/i386/i586/Implies: New file.
New highly optimized string functions for i[345]86.
* sysdeps/i386/memchr.S, sysdeps/i386/memcmp.S: New files.
* sysdeps/i386/stpcpy.S, sysdeps/i386/stpncpy.S: New files.
* sysdeps/i386/strchr.S, sysdeps/i386/strcspn.S: New files.
* sysdeps/i386/strpbrk.S, sysdeps/i386/strrchr.S: New files.
* sysdeps/i386/strspn.S, sysdeps/i386/i486/strcat.S: New files.
* sysdeps/i386/i486/strlen.S, sysdeps/i386/i586/strchr.S: New files.
* sysdeps/i386/i586/strlen.S: New file.
* sysdeps/i386/memchr.c: Removed. There is now an assembler version.
* sysdeps/i386/i586/memcopy.h (WORD_COPY_BWD): Parameters did
not correspond to used values.
* sysdeps/unix/sysv/linux/nfs/nfs.h: New file. Simply a wrapper
around a kernel header file.
* sysdeps/unix/sysv/linux/Dist: Add it.
* sysdeps/unix/sysv/linux/Makefile [$(subdir)=sunrpc] (headers):
Likewise.
* sysdeps/unix/sysv/linux/local_lim.h: Rewrite. Instead of
defining ourself we use a kernel header file.
* sysdeps/unix/sysv/linux/i386/sysdep.h (DO_CALL): Optimize system
call handler for i586.
* sysdeps/unix/sysv/linux/sys/param.h: Add copyright and clean up.
Sat Oct 14 02:52:36 1995 Ulrich Drepper <drepper@ipd.info.uni-karlsruhe.de>
* malloc/malloc.c (_malloc_internal): Performance fix. Move
if statement out of loop.
* stdio/_itoa.c, stdio/_itoa.h: Complete rewrite. Much faster
implementation using GMP functions. Contributed by
Torbjorn Granlund and Ulrich Drepper.
* stdio/test_rdwr.c: Include <errno.h>.
* sysdeps/i386/i586/Implies: New file.
New highly optimized string functions for i[345]86.
* sysdeps/i386/memchr.S, sysdeps/i386/memcmp.S: New files.
* sysdeps/i386/stpcpy.S, sysdeps/i386/stpncpy.S: New files.
* sysdeps/i386/strchr.S, sysdeps/i386/strcspn.S: New files.
* sysdeps/i386/strpbrk.S, sysdeps/i386/strrchr.S: New files.
* sysdeps/i386/strspn.S, sysdeps/i386/i486/strcat.S: New files.
* sysdeps/i386/i486/strlen.S, sysdeps/i386/i586/strchr.S: New files.
* sysdeps/i386/i586/strlen.S: New file.
* sysdeps/i386/memchr.c: Removed. There is now an assembler version.
* sysdeps/i386/i586/memcopy.h (WORD_COPY_BWD): Parameters did
not correspond to used values.
* sysdeps/unix/sysv/linux/nfs/nfs.h: New file. Simply a wrapper
around a kernel header file.
* sysdeps/unix/sysv/linux/Dist: Add it.
* sysdeps/unix/sysv/linux/Makefile [$(subdir)=sunrpc] (headers):
Likewise.
* sysdeps/unix/sysv/linux/local_lim.h: Rewrite. Instead of
defining ourself we use a kernel header file.
* sysdeps/unix/sysv/linux/i386/sysdep.h (DO_CALL): Optimize system
call handler for i586.
* sysdeps/unix/sysv/linux/sys/param.h: Add copyright and clean up.
* Makeconfig (config-LDFLAGS): Define to
-Wl-dynamic-linker=$(libdir)$(rtld-installed-name).
(rtld-installed-name): New variable.
* elf/Makefile (install-lib): Variable removed.
(install-others): Define this instead, to
$(libdir)(rtld-installed-name).
($(libdir)(rtld-installed-name)): New target; install from ld.so.
* elf/ldd.sh.in: New file.
* elf/Makefile (distribute): Add ldd.sh.in.
(install-bin): Add ldd.
($(objpfx)ldd: ldd.sh.in): New rule.
* sysdeps/mach/hurd/dl-sysdep.c: Use __hurd_fail throughout.
* hurd/hurd.h (__hurd_fail): Replace macro with inline function.
Translate some Mach errors to Hurd errors.
* elf/rtld.c (dl_main): Under --list, print msg if executable is
statically linked.
* elf/dl-load.c (_dl_map_object_from_fd): Rewrote program header
table processing.
Sat Oct 7 01:25:48 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* sysdeps/stub/machine-gmon.h: Add #error.
Fri Oct 6 01:49:48 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* elf/dynamic-link.h (elf_get_dynamic_info): If DYN is null, don't
examine it.
* hurd/hurdsig.c: Include <hurd/crash.h> in place of <hurd/core.h>.
(write_corefile): Call __crash_dump_task instead of __core_dump_task.
Use envariable CRASHSERVER instead of CORESERVER.
* hurd/Makefile (user-interfaces): Replace hurd/core with hurd/crash.
* libc-symbols.h (link_warning): Take new first arg SYMBOL; ask
for a warning on references to that specific symbol, not the
entire containing object file.
(stub_warning): Pass symbol name to link_warning.
* stdio/gets.c: Pass function name in link_warning invocation.
* hurd/intr-msg.c: Treat apparent EINTR return from msg trap like
MACH_SEND_INTERRUPTED. That indicates interrupt_operation was
sent, but failed.
* stdlib/msort.c: Include memcopy.h.
(msort_with_tmp): If operating on aligned op_t words, use direct word
fetches and stores.
* sysdeps/i386/dl-machine.h (ELF_MACHINE_BEFORE_RTLD_RELOC): Add
missing backslash.
* sysdeps/mach/hurd/select.c: Deal with out of order replies
during io_select request loop.
Handle MACH_RCV_TIMED_OUT error from requests.
* hurd/intr-msg.c: If the user passed the MACH_RCV_TIMEOUT option,
distinguish MACH_RCV_TIMED_OUT from EINTR.
* posix/glob.c (glob): Use realloc to extend strings for GLOB_MARK
slash.
(glob_in_dir): Don't allocate extra byte here.
* sysdeps/i386/dl-machine.h (ELF_MACHINE_BEFORE_RTLD_RELOC):
Decrement the DT_RELSZ value for the skipped reloc.
* sysdeps/mach/hurd/mmap.c: Fix inverted test of MAP_FIXED.
* stdio/vfscanf.c (number): Allow field width to inhibit first
digit after base detection.
* stdio/vfprintf.c (vfprintf: %s): Never search past the limit
specified by the precision.
* grp/grpread.c (__grpscan): New function.
* grp/grp.h (__grpscan): Declare it.
* grp/getgrgid.c: Use __grpscan.
* grp/getgrnam.c: Likewise.
* pwd/pwdread.c (__pwdscan): New function.
* pwd/pwd.h (__pwdscan): Declare it.
* pwd/getpwnam.c: Use __pwdscan.
* pwd/getpwuid.c: Likewise.
Thu Aug 24 16:29:40 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* sysdeps/mach/hurd/mmap.c: Treat (FLAGS & MAP_TYPE) == 0 like
MAP_FILE.
* hurd/thread-cancel.c: Return EINTR when called on self.
* sysdeps/i386/elf/start.S (data_start): Define as weak alias for
__data_start.
* inet/netdb.h: Moved to resolv.
* inet/Makefile (headers): Remove netdb.h.
* resolv/Makefile (headers): Add netdb.h.
* resolv/gethnamaddr.c, resolv/inet_addr.c, resolv/netdb.h,
resolv/res_send.c: Updated from BIND-4.9.3-BETA26.
* hurd/thread-cancel.c: If SS->cancel_hook is not null, call it before
resuming the thread.
* hurd/hurd/signal.h (struct hurd_sigstate): New member `cancel_hook'.
* hurd/Makefile: Removed dep on hurd/signal.h for RPC stub objects.
Mon Aug 21 16:37:09 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* sysdeps/i386/dl-machine.h (elf_machine_rel): Grok R_386_NONE
relocs, and do nothing. Why the linker generates them we may
never know.
* sysdeps/mach/hurd/i386/intr-msg.h: New file.
* hurd/intr-msg.c: Use INTR_MSG_TRAP macro from machine-dependent
"intr-msg.h" for special syscall code, instead of i386-specific asm.
* hurd/hurdsig.c: Use INTR_MSG_BACK_OUT macro from
machine-dependent "intr-msg.h" before mutating thread state to
skip RPC.
* sysdeps/mach/hurd/i386/trampoline.c: If PC is inside
_hurd_intr_rpc_mach_msg special syscall code, use real SP saved in
%ecx.
* Makeconfig (link-libc): New variable; use shared library if
available.
(+link): Use it.
* sysdeps/mach/hurd/fork.c (_hurd_fork_locks): Variable removed.
Instead, declare with `symbol_set_declare'.
(fork): Use symbol_set_* macros for _hurd_fork_locks.
Use SS->thread instead of __mach_thread_self (). Suspend all
other threads during task_create and port copying.
* hurd/thread-cancel.c: New file.
* sysdeps/mach/hurd/i386/trampoline.c (_hurd_setup_sighandler): In
rpc_wait case, frob mach_msg args to set timeout on receive.
(_hurdsig_rcv_interrupted_p): Function removed.
* sysdeps/mach/hurd/alpha/trampoline.c: Likewise.
* sysdeps/mach/hurd/hppa/trampoline.c: Likewise.
* sysdeps/mach/hurd/mips/trampoline.c: Likewise.
* hurd/intr-msg.c: New file.
* hurd/hurd/signal.h (struct hurd_sigstate): New member `cancel'.
(_hurdsig_rcv_interrupted_p): Declaration removed.
(HURD_EINTR_RPC): Macro removed.
(_hurd_longjmp_thread_state, _hurd_interrupted_rpc_timeout): Declare
these.
* hurd/intr-rpc.h: New file.
* hurd/intr-rpc.defs: Just import intr-rpc.h.
* hurd/hurdsig.c (_hurd_interrupted_rpc_timeout): New variable.
(interrupted_reply_port_location): Take new flag arg; only catch
faults if it's set.
(abort_rpcs): Rename to _hurdsig_abort_rpcs; take same new flag arg.
No longer use _hurdsig_rcv_interrupted_p; instead compare PC to
&_hurd_intr_rpc_msg_in_trap. If before it, mutate state to simulate
MACH_SEND_INTERRUPTED return; on it, interrupt the operation. All
callers changed.
* hurd/hurd.h (hurd_thread_cancel, hurd_check_cancel): Declare these.
* hurd/Makefile (distribute): Remove intr-rpc.awk.
(sig): Add thread-cancel.
(transform-user-stub, transform-user-stub-output): Variables removed.
* sysdeps/mach/hurd/dl-sysdep.c: Change all RPCs from
`__hurd_intr_rpc_*' to `__*'.
(_hurd_intr_rpc_mach_msg): New function.
(_hurd_thread_sigstate): Function removed.
* sysdeps/mach/hurd/ioctl.c: Use _hurd_intr_rpc_mach_msg function,
instead of __mach_msg inside HURD_EINTR_RPC macro.
* sysdeps/generic/morecore.c [__GNU_LIBRARY__]: Declare `__sbrk'
to take ptrdiff_t arg.
* sysdeps/mach/hurd/fork.c: Remove _hurd_longjmp_thread_state decl.
* sysdeps/mach/hurd/kill.c (kill_pid): Don't make `inline'.
* libc-symbols.h [GCC >= 2.7] (strong_alias, weak_symbol,
weak_alias): Use `extern' storage class.
* stdio/stdio.h (__validfp): Use ({...}) rather than a comma
expression, to avoid gcc's "value computed is not used" warning.
* libc-symbols.h (_elf_set_element): Give the set-element variable
an `unused' attribute.
* hurd/hurd/threadvar.h (__hurd_threadvar_location): Declare with
__attribute__ ((__const__)).
* hurd/hurd/signal.h (_hurd_self_sigstate): Likewise.
* hurd/hurd/userlink.h (_hurd_userlink_link): Properly set
LINK->resource.next->resource.prevp when appropriate, not
LINK->resource.next->thread.prevp!!!
* elf/rtld.c [! NDEBUG] (__assert_perror_fail): New function.
* hurd/hurdstartup.c (_hurd_startup): Fancier kludge to guess phdr
and user entry point addresses.
* elf/dl-load.c (open_path): Don't do strlen on DIRPATH if it's null.
(_dl_map_object): DT_RPATH value is relative to DT_STRTAB value.
* Makerules (install-lib.so): Don't include libc.so.
[$(build-shared)=yes] (install): Depend on the installed libc.so file.
[$(build-shared)=yes] (install-no-libc.a): Make this, rather than
install, depend on the installed $(install-lib.so) files.
[$(build-shared)=yes] (install-lib.so): Append libc.so after that rule.
* sysdeps/mach/hurd/dl-sysdep.c (_dl_sysdep_start): Add kludge to
allocate high addresses to avoid random mappings appearing there.
(mmap): Comment out mask; always pass zero.
Tue Jun 6 13:34:53 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* sysdeps/i386/dl-machine.h (ELF_MACHINE_USER_ADDRESS_MASK): New macro.
* sysdeps/mach/hurd/dl-sysdep.c (mmap): Use it as mask in vm_map call.
* elf/dl-error.c (_dl_catch_error): Clear *ERRSTRING and *OBJNAME
when successful.
* sysdeps/mach/hurd/dl-sysdep.c (threadvars): New static variable.
(__hurd_threadvar_max, __hurd_threadvar_stack_offset): Define these
variables, using the `threadvars' buffer.
* elf/dl-reloc.c: Don't dereference L->l_prev when it's null.
* sysdeps/i386/dl-runtime.c: Likewise.
* elf/rtld.c (dl_main): Add missing NULL terminating argument in
_dl_sysdep_fatal call.
(__assert_fail): Likewise.
* locale/Makefile (localedef-modules): Renamed ctype to
locale-ctype so as not to conflict with the object file for
ctype/ctype.c in the build directory.
* sysdeps/i386/dl-machine.h (elf_machine_rel): If MAP->l_type is
lt_interpreter, first undo relocation done during bootstrapping.
* hurd/hurdsig.c (_hurd_internal_post_signal): Don't loop to check
pending signals if the thread is in a critical section. It will
send us a msg when it finishes.
* sysdeps/mach/hurd/pathconf.c: New file.
* sysdeps/mach/hurd/fpathconf.c: New file.
* sysdeps/mach/hurd/sigaction.c: Only notify the proc server for
SIGCHLD when the SA_NOCLDSTOP bit actually changes.
* sysdeps/mach/hurd/i386/init-first.c: In cthreads case, handle
args on stack from kernel.
* posix/Makefile, sysdeps/alpha/Makefile,
* sysdeps/mach/hurd/Makefile, sysdeps/sparc/Makefile, Makefile,
* Makerules, Make-dist: Fix "cvs commit" cmds in rules to not fail
in the absence of CVS dirs.
* hurd/hurdstartup.c: Don't call __mach_init. Grok args from the
kernel on the stack properly.
* set-init.c: Never call _init/_fini; just run __libc_subinit.
* Makerules (LDFLAGS-c.so): Add -nostartfiles.
* mach/Machrules (LDFLAGS-$(interface.so)): Likewise.
* configure.in: Move defaulting of --with-elf and --with-gnu-*
based on host os outside the AC_CACHE_VAL for the sysdirs
calculation.
* Makeconfig (localedir, nlsdir): New variables.
* values.h: New file.
* Makefile (headers): Add values.h.
* locale/Makefile (distribute): Add error.h.
* locale/localedef.c: Include "error.h".
(main): Use error_message_count instead of warning_cntr.
* sysdeps/mach/i386/sysdep.h (RETURN_TO): New macro.
* Makerules (install-lib.so): Add %.so for each %_pic.a.
* sysdeps/mach/hurd/i386/init-first.c: New file.
* Makeconfig (+gccwarn): Add -Winline.
* hurd/hurdsig.c (_hurd_internal_post_signal): If SS->context is
set, avoid abort_rpcs, and use reply and intr ports saved in
SS->context.
* sysdeps/mach/hurd/i386/trampoline.c: Don't set SS->intr_port
from SS->context. Don't clear SS->context.
* sysdeps/mach/hurd/i386/sigreturn.c: Don't set SS->intr_port when
setting SS->context. If msg_sig_post returns, re-lock and clear
SS->context.
Fri May 5 10:37:09 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* mach/Makefile (errsystems.c): Comment out generation rule.
* sysdeps/mach/_strerror.c: Consider a system unknown if its
bad_sub member is null.
* mach/mig-alloc.c: Add weak alias to non-__ name.
* sysdeps/mach/hurd/dup2.c: Fixed broken test in last change.
* elf/dl-error.c (_dl_catch_error): Actually call the OPERATE
function. Duh.
* hurd/Makefile (distribute): Added hurdstartup.h.
* hurd/hurd.h: Remove _hurd_startup decl.
* hurd/hurd/ioctl.h (_HURD_HANDLE_IOCTLS): Use __attribute__
((__unused__)) instead of gratuitous self reference.
* sysdeps/mach/hurd/dup2.c: Call _hurd_alloc_fd to expand the
table if FD2 doesn't fit.
* sysdeps/mach/hurd/getdtsz.c: Return the RLIM_NOFILE soft limit,
not the current table size.
* sysdeps/i386/init-first.c: New file.
* sysdeps/stub/init-first.c: New file.
* mach/Machrules [interface-library]
(LDFLAGS-$(interface-library:lib%=%.so)): New variable, set to
-nostdlib.
* sysdeps/mach/hurd/fork.c: Subfunction `unlockss' removed. Lock
_hurd_siglock only around initial task creation in parent. Use
_hurd_critical_section_unlock at end. Handle dead name rights
properly, and deal with a send right dying while we try to copy
it. For the time being, use assert_perror for kernel and proc RPC
failures.
Fri Apr 21 01:10:15 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* extra-lib.mk: Don't include $(o-iterator); construct it by hand
using $(object-suffixes-$(lib)) instead.
* sysdeps/mach/hurd/Makefile (LDLIBS-c.so): New variable.
* Makerules (lib%.so: lib%_pic.a): Pass $(LDFLAGS-$(notdir $*).so).
(LDFLAGS-c.so): New variable.
* resolv/res_init.c (res_init): Don't clobber _res.options with
RES_DEFAULT. If RES_INIT is clear, OR in RES_DEFAULT.
* hurd/hurd.h: Declare _hurd_startup.
* hurd/hurdstartup.c: New file.
* hurd/Makefile (routines): Add hurdstartup.
its inlines too.
* sysdeps/unix/sysv/sysv4/sigset.h (__sigfillset): Use ~0L instead
of -1 to avoid compiler warning.
* configure.in (host_os=linux*): Set elf=yes for this, not just
linux*elf*.
* sysdeps/mach/hurd/i386/trampoline.c: Add a link to
SS->active_resources, so that _hurdsig_longjmp_from_handler will
be called when a longjmp unwinds the signal frame.
* sysdeps/mach/hurd/i386/sigreturn.c: Remove the link on the
SS->active_resources chain added by _hurd_setup_sighandler.
* hurd/sigunwind.c: New file.
* hurd/Makefile (sig): Add sigunwind.
* Makerules (lib%.so: lib%_pic.a): Remove dir name from $*.
* MakeTAGS (tags-sources): Include $(all-dist).
[subdir] (all-dist): Define to $(distribute).
