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As decribed in BZ#759, Linux getcontext implementation on Linux does
differs from other SysV system about the returned uc_stack. This is
true not only for i386, but for all the architecture I could actually
check (aarch64, arm, alpha, hppa, m68k, mips, mips64, mips64n32,
powerpc, powerpc64, powerpc64le, s390x, sh, sparc, sparc64, and x86).
And I think we should not change current behavior for some reasons:
1. POSIX 2008 removed this SySV interface for a good reason and changing
this behavior adds nothing for current portable code. POSIX 2001
specification does states that stack should be saved [1] and current
GLIBC code does in a arch-specific manner (inside the mcontext_t)
which allows the setcontext to work correctly.
2. Changing this behavior would potentially require compat symbols and
I see no gain in adding compat symbols for deprecated interfaces.
3. Also, for comment #2 in BZ#759, it is up to kernel do setup the contents
for ucontext_t and currently it does not provide the stack information
as well. Trying to change it is also another fix that does not worth
the possible gains.
Instead my proposal is to make it clear the current interface may differ
depending of the underlying operational system.
glibc documentation and close this bug as invalid.
[BZ #759]
* manual/setjmp.texi (getcontex): Document uc_stack value on Linux.
[1] http://pubs.opengroup.org/onlinepubs/009695399/functions/getcontext.html
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The Summary is now generated from @standards, and syntax-checking is
performed. If invalid @standards syntax is detected, summary.pl will
fail, reporting all errors. Failure and error reporting is disabled
for now, however, since much of the manual is still incomplete
wrt. header and standards annotations.
Note that the sorting order of the Summary has changed; summary.pl
respects the locale, like summary.awk did, but the use of LC_ALL=C is
introduced in the Makefile. Other notable deviations are improved
detection of the annotated elements' names, which are used for
sorting, and improved detection of the @node used to reference into
the manual. The most noticeable difference in the rendered Summary is
that entries may now contain multiple lines, one for each header and
standard combination.
summary.pl accepts a `--help' option, which details the expected
syntax of @standards. If errors are reported, the user is directed to
this feature for further information.
* manual/Makefile: Generate summary.texi with summary.pl.
Force use of the C locale. Update Perl dependency comment.
* manual/header.texi: Update reference to summary.awk.
* manual/macros.texi: Refer authors to `summary.pl --help'.
* manual/summary.awk: Remove file.
* manual/summary.pl: New file. Generate summary.texi, and
check for @standards-related syntax errors.
* manual/argp.texi: Convert header and standards @comments to
@standards.
* manual/arith.texi: Likewise.
* manual/charset.texi: Likewise.
* manual/conf.texi: Likewise.
* manual/creature.texi: Likewise.
* manual/crypt.texi: Likewise.
* manual/ctype.texi: Likewise.
* manual/debug.texi: Likewise.
* manual/errno.texi: Likewise.
* manual/filesys.texi: Likewise.
* manual/getopt.texi: Likewise.
* manual/job.texi: Likewise.
* manual/lang.texi: Likewise.
* manual/llio.texi: Likewise.
* manual/locale.texi: Likewise.
* manual/math.texi: Likewise.
* manual/memory.texi: Likewise.
* manual/message.texi: Likewise.
* manual/pattern.texi: Likewise.
* manual/pipe.texi: Likewise.
* manual/process.texi: Likewise.
* manual/resource.texi: Likewise.
* manual/search.texi: Likewise.
* manual/setjmp.texi: Likewise.
* manual/signal.texi: Likewise.
* manual/socket.texi: Likewise.
* manual/startup.texi: Likewise.
* manual/stdio.texi: Likewise.
* manual/string.texi: Likewise.
* manual/sysinfo.texi: Likewise.
* manual/syslog.texi: Likewise.
* manual/terminal.texi: Likewise.
* manual/threads.texi: Likewise.
* manual/time.texi: Likewise.
* manual/users.texi: Likewise.
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2016-05-06 Rical Jasan <ricaljasan@pacific.net>
* manual/setjmp.texi: Fix typos in the manual.
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Calling setcontext from a signal handler can be done safely so
it is sufficient to note that it is not recommended.
Also mention in setcontext documentation that the behaviour of
setcontext when restoring a context created by a call to a signal
handler is unspecified.
2014-04-17 Will Newton <will.newton@linaro.org>
* manual/setjmp.texi (System V contexts): Add note that
calling setcontext on a context created by a call to a
signal handler is undefined. Update text to note that
setcontext from a signal handler is possible but not
recommended.
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ChangeLog:
2014-03-13 Will Newton <will.newton@linaro.org>
* manual/setjmp.texi (System V contexts): Improve
clarity and grammar of documentation.
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Should hopefully be all obvious stuff.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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[BZ # 13938]
* manual/setjmp.texi (System V contexts): Fix sentence.
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2001-05-21 Andreas Jaeger <aj@suse.de>
* locale/programs/ld-collate.c (handle_ellipsis): Fix message.
Patch by Philipp Thomas <pthomas@suse.de>.
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2001-04-08 Hans-Peter Nilsson <hp@axis.com>
* sysdeps/unix/sysv/linux/cris/Dist: New file.
* sysdeps/unix/sysv/linux/cris/Makefile: New file.
* sysdeps/unix/sysv/linux/cris/_G_config.h: New file.
* sysdeps/unix/sysv/linux/cris/bits/fcntl.h: New file.
* sysdeps/unix/sysv/linux/cris/bits/mman.h: New file.
* sysdeps/unix/sysv/linux/cris/bits/resource.h: New file.
* sysdeps/unix/sysv/linux/cris/brk.c: New file.
* sysdeps/unix/sysv/linux/cris/chown.c: New file.
* sysdeps/unix/sysv/linux/cris/clone.S: New file.
* sysdeps/unix/sysv/linux/cris/fchown.c: New file.
* sysdeps/unix/sysv/linux/cris/fcntl.c: New file.
* sysdeps/unix/sysv/linux/cris/fxstat.c: New file.
* sysdeps/unix/sysv/linux/cris/getegid.c: New file.
* sysdeps/unix/sysv/linux/cris/geteuid.c: New file.
* sysdeps/unix/sysv/linux/cris/getgid.c: New file.
* sysdeps/unix/sysv/linux/cris/getgroups.c: New file.
* sysdeps/unix/sysv/linux/cris/getresgid.c: New file.
* sysdeps/unix/sysv/linux/cris/getresuid.c: New file.
* sysdeps/unix/sysv/linux/cris/getrlimit.c: New file.
* sysdeps/unix/sysv/linux/cris/getrlimit64.c: New file.
* sysdeps/unix/sysv/linux/cris/getuid.c: New file.
* sysdeps/unix/sysv/linux/cris/lchown.c: New file.
* sysdeps/unix/sysv/linux/cris/lockf64.c: New file.
* sysdeps/unix/sysv/linux/cris/lxstat.c: New file.
* sysdeps/unix/sysv/linux/cris/mmap.S: New file.
* sysdeps/unix/sysv/linux/cris/mmap64.S: New file.
* sysdeps/unix/sysv/linux/cris/msgctl.c: New file.
* sysdeps/unix/sysv/linux/cris/profil-counter.h: New file.
* sysdeps/unix/sysv/linux/cris/register-dump.h: New file.
* sysdeps/unix/sysv/linux/cris/semctl.c: New file.
* sysdeps/unix/sysv/linux/cris/setegid.c: New file.
* sysdeps/unix/sysv/linux/cris/seteuid.c: New file.
* sysdeps/unix/sysv/linux/cris/setfsgid.c: New file.
* sysdeps/unix/sysv/linux/cris/setfsuid.c: New file.
* sysdeps/unix/sysv/linux/cris/setgid.c: New file.
* sysdeps/unix/sysv/linux/cris/setgroups.c: New file.
* sysdeps/unix/sysv/linux/cris/setregid.c: New file.
* sysdeps/unix/sysv/linux/cris/setresgid.c: New file.
* sysdeps/unix/sysv/linux/cris/setresuid.c: New file.
* sysdeps/unix/sysv/linux/cris/setreuid.c: New file.
* sysdeps/unix/sysv/linux/cris/setrlimit.c: New file.
* sysdeps/unix/sysv/linux/cris/setuid.c: New file.
* sysdeps/unix/sysv/linux/cris/shmctl.c: New file.
* sysdeps/unix/sysv/linux/cris/socket.S: New file.
* sysdeps/unix/sysv/linux/cris/sys/ucontext.h: New file.
* sysdeps/unix/sysv/linux/cris/syscall.S: New file.
* sysdeps/unix/sysv/linux/cris/sysdep.S: New file.
* sysdeps/unix/sysv/linux/cris/sysdep.h: New file.
* sysdeps/unix/sysv/linux/cris/vfork.S: New file.
* sysdeps/unix/sysv/linux/cris/xstat.c: New file.
2001-04-08 Hans-Peter Nilsson <hp@axis.com>
* sysdeps/cris/Dist: New file.
* sysdeps/cris/Implies: New file.
* sysdeps/cris/Makefile: New file.
* sysdeps/cris/__longjmp.S: New file.
* sysdeps/cris/_mcount.S: New file.
* sysdeps/cris/bits/endian.h: New file.
* sysdeps/cris/bits/setjmp.h: New file.
* sysdeps/cris/bits/string.h: New file.
* sysdeps/cris/dl-machine.h: New file.
* sysdeps/cris/elf/start.S: New file.
* sysdeps/cris/machine-gmon.h: New file.
* sysdeps/cris/memcopy.h: New file.
* sysdeps/cris/memusage.h: New file.
* sysdeps/cris/setjmp.S: New file.
* sysdeps/cris/sysdep.h: New file.
* sysdeps/cris/wordcopy.c: New file.
2001-04-08 Hans-Peter Nilsson <hp@axis.com>
* elf/elf.h: Add new relocations for CRIS.
2001-04-08 Hans-Peter Nilsson <hp@axis.com>
* shlib-versions: Add cases for Linux on CRIS.
2001-04-08 Hans-Peter Nilsson <hp@axis.com>
* configure.in (ASM_LINE_SEP tests): Handle CRIS assembly, with
';' for comments and '@' for line separator.
2001-04-08 Hans-Peter Nilsson <hp@axis.com>
* sysdeps/unix/sysv/linux/hppa/sysdep.h (INLINE_SYSCALL): Fix
typo; s/==/=/ for assignment.
2001-04-08 Hans-Peter Nilsson <hp@axis.com>
* malloc/Makefile: Correct comment; mtrace is Perl, not AWK.
2001-04-08 Hans-Peter Nilsson <hp@axis.com>
* iconv/gconv_simple.c (internal_ucs4_loop_unaligned): Check for
empty input before checking full output.
2001-04-08 Hans-Peter Nilsson <hp@axis.com>
* iconv/gconv.c (__gconv): Don't derefer parameter cd before
checking if == -1L.
2001-04-08 Ulrich Drepper <drepper@redhat.com>
* inet/rexec.c (rexec_af): Avoid calling perror with errno being set.
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* manual/Makefile (chapters): Add resource.
* manual/time.texi: Move section on resources to...
* manual/resource.texi: ...here. New file.
* manual/setjmp.texi: Adjust back reference.
Patch by Bryan Henderson <bryanh@giraffe-data.com>.
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* manual/setjmp.texi: Many changes to correct bad English introduced
mainly by me.
* manual/time.texi: Likewise.
Patches by Neil Booth <neil@rosenet.ne.jp>.
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1999-02-15 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* manual/llio.texi (Waiting for I/O): Correct meaning. Patch by
Jochen Voss <voss@mathematik.uni-kl.de> [PR libc/969].
* manual/setjmp.texi (Non-Local Exits and Signals): Fix
typo. Patch by Jochen Voss <voss@mathematik.uni-kl.de> [PR libc/970].
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1998-07-10 18:14 -0400 Zack Weinberg <zack@rabi.phys.columbia.edu>
* manual/Makefile: Overhauled. Generate libc.texinfo from the
chapter files. Exorcise the chapters, chapters-incl mess.
Support inserting doc chapters from add-on modules.
(chapters): New variable.
(add-chapters): New variable.
(appendices): New variable.
(libc.texinfo): New target.
(clean): Fix bugs.
(realclean): Fix bugs.
* manual/texis.awk: New file.
* manual/libc-texinfo.sh: New file.
* manual/libc-texinfo.in: New file.
* manual/conf.texi (top @node): Remove next pointer.
* manual/lang.texi (top @node): Remove prev pointer.
* manual/job.texi (top @node): Add explicit pointers.
* manual/message.texi (top @node): Add explicit pointers.
* manual/nss.texi (top @node): Add explicit pointers.
* manual/process.texi (top @node): Add explicit pointers.
* manual/startup.texi (top @node): Add explicit pointers.
* manual/terminal.texi (top @node): Add explicit pointers.
* manual/users.texi (top @node): Add explicit pointers.
* manual/arith.texi: Add %MENU% tag.
* manual/conf.texi: Add %MENU% tag.
* manual/contrib.texi: Add %MENU% tag.
* manual/ctype.texi: Add %MENU% tag.
* manual/errno.texi: Add %MENU% tag.
* manual/filesys.texi: Add %MENU% tag.
* manual/header.texi: Add %MENU% tag.
* manual/install.texi: Add %MENU% tag.
* manual/intro.texi: Add %MENU% tag.
* manual/io.texi: Add %MENU% tag.
* manual/job.texi: Add %MENU% tag.
* manual/lang.texi: Add %MENU% tag.
* manual/llio.texi: Add %MENU% tag.
* manual/locale.texi: Add %MENU% tag.
* manual/maint.texi: Add %MENU% tag.
* manual/math.texi: Add %MENU% tag.
* manual/mbyte.texi: Add %MENU% tag.
* manual/memory.texi: Add %MENU% tag.
* manual/message.texi: Add %MENU% tag.
* manual/nss.texi: Add %MENU% tag.
* manual/pattern.texi: Add %MENU% tag.
* manual/pipe.texi: Add %MENU% tag.
* manual/process.texi: Add %MENU% tag.
* manual/search.texi: Add %MENU% tag.
* manual/setjmp.texi: Add %MENU% tag.
* manual/signal.texi: Add %MENU% tag.
* manual/socket.texi: Add %MENU% tag.
* manual/startup.texi: Add %MENU% tag.
* manual/stdio.texi: Add %MENU% tag.
* manual/string.texi: Add %MENU% tag.
* manual/sysinfo.texi: Add %MENU% tag.
* manual/terminal.texi: Add %MENU% tag.
* manual/time.texi: Add %MENU% tag.
* manual/users.texi: Add %MENU% tag.
1998-07-13 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/unix/sysv/linux/i386/dl-procinfo.h (x86_cap_flags):
Update.
1998-07-11 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* sysdeps/unix/sysv/linux/recvmsg.c (__libc_recvmsg): Use ANSI
style declaration to avoid warning.
* sysdeps/unix/sysv/linux/sendmsg.c (__libc_sendmsg): Likewise.
1998-07-04 Mark Kettenis <kettenis@phys.uva.nl>
* elf/rtld.c (process_dl_debug): Add missing continue.
1998-07-12 Mark Kettenis <kettenis@phys.uva.nl>
* elf/rtld.c (_dl_skip_args): Make global because the Hurd startup
code needs it.
1998-07-10 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* Makeconfig ($(common-objpfx)sysd-dirs): Write out definition of
sysd-dirs-done.
* Makerules: Don't generate version maps too early.
($(common-objpfx)sysd-versions): Force regeneration if the list of
subdirs has changed.
1998-07-10 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* elf/dlfcn.h (DL_CALL_FCT): Use portable comma expression.
1998-07-11 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* iconv/gconv_db.c (gen_steps): Always set *handle and *nsteps.
* iconv/gconv_dl.c (__gconv_find_shlib): Correct use of tfind
return value.
1998-07-12 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* elf/dl-open.c (dl_open_worker): New function.
(_dl_open): Call it to do the actual work while catching errors.
* elf/dl-close.c (_dl_close): Only call termination function if
the initialisation function was called.
1998-07-13 Ulrich Drepper <drepper@cygnus.com>
* libio/libioP.h (_IO_cleanup_registration_needed): Use __PMT.
Reported by Felix von Leitner <leitner@amdiv.de>.
1998-07-13 10:28 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* elf/rtld.c (process_dl_debug): Add missing continue.
1998-06-23 Mark Kettenis <kettenis@phys.uva.nl>
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Sun Dec 8 06:56:49 1996 Ulrich Drepper <drepper@cygnus.com>
* io/getwd.c: Use PATH_MAX not LOCAL_PATH_MAX. Fix typo in
comment.
* stdlib/canonicalize.c: Correct bugs in last change.
Patch by HJ Lu.
* libio/Makefile (routines): Remove ioprims.
(aux): Remove cleanup.
Add IO_DEBUG option for .o files.
* libio/cleanups.c: Removed.
* libio/ioprims.c: Removed.
* libio/filedoalloc.c: More updates from libg++-2.8b5.
* libio/fileops.c: Likewise.
* libio/genops.c: Likewise.
* libio/iolibio.h: Likewise.
* libio/iopopen.c: Likewise.
* libio/iovsprintf.c: Likewise.
* libio/iovsscanf.c: Likewise.
* libio/libio.h: Likewise.
* libio/libioP.h: Likewise.
* libio/memstream.c: Likewise.
* libio/strfile.h: Likewise.
* libio/vasprintf.c: Likewise.
* libio/vsnprintf.c: Likewise.
* libio/stdio.h: Define P_tmpdir only is __USE_SVID.
* manual/arith.texi: Change references to ANSI C to ISO C.
* manual/conf.texi: Likewise.
* manual/creature.texi: Likewise.
* manual/ctype.texi: Likewise.
* manual/errno.texi: Likewise.
* manual/filesys.texi: Likewise.
* manual/intro.texi. Likewise.
* manual/io.texi: Likewise.
* manual/lang.texi: Likewise.
* manual/libc.texinfo: Likewise.
* manual/locale.texi: Likewise.
* manual/maint.texi: Likewise.
* manual/mbyte.texi: Likewise.
* manual/memory.texi: Likewise.
* manual/process.texi: Likewise.
* manual/process.texi: Likewise.
* manual/search.texi: Likewise.
* manual/setjmp.texi: Likewise.
* manual/signal.texi: Likewise.
* manual/startup.texi: Likewise.
* manual/stdio.texi: Likewise.
* manual/string.texi: Likewise.
* manual/time.texi: Likewise.
* manual/locale.texi: Remove description of LC_RESPONSE and add
LC_MESSAGES.
* Makefile (subdirs): Change malloc in $(malloc).
* config.make.in: Add variable malloc which is initialized from
@malloc@.
* configure.in: Add new option --enable-new-malloc to use new
malloc. This is the default on Linux.
* sysdeps/unix/sysv/linux/configure.in: Define malloc to new-malloc
by default.
* new-malloc/Makefile: New file. Improved malloc implementation.
* new-malloc/malloc.c: Likewise.
* new-malloc/malloc.h: Likewise.
* new-malloc/mallocbug.c: Likewise.
* new-malloc/obstack.c: Likewise.
* new-malloc/obstack.h: Likewise.
* new-malloc/thread-m.h: Likewise.
* time/Makefile: Compile ap.c with NO_MCHECK flag for now.
* time/ap.c: Don't call mcheck if NO_MCHECK is defined.
* resolv/Makefile: Add rule to rebuiild libresolv.so when libc.so
changed.
* stdio/feof.c: Update copyright.
* stdio/stdio.h: Add field for lock to FILE structure.
Add cast to *MAGIC constants to prevent warnings.
* stdio-common/bug7.c: Correct test. Stream must not be closed
twice.
* stdlib/Makefile (routines): Add secure-getenv.
* stdlib/secure-getenv.c: New file. __secure_getenv function
moved to here from sysdeps/generic/getenv.c. Otherwise an
application cannot replace the getenv function in the libc.
* sysdeps/generic/getenv.c: Remove __secure_getenv function.
* sysdeps/stub/getenv.c: Remove __secure_getenv alias.
* sysdeps/mach/libc-lock.h: Define__libc_mutex_lock to __mutex_lock.
* sysdeps/posix/fdopen.c: Update copyright. Don't use EXFUN.
* time/test-tz.c: Comment fifth test out. PROBLEM.
* time/tzset.c: De-ANSI-declfy.
(__tzset): Don't increment pointer tz when no DST information is
given.
Sat Dec 7 23:47:54 1996 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/mach/libc-lock.h [_LIBC]: Add definition of
__libc_mutex_lock.
Patch by Thomas Bushnell.
* sysdeps/unix/sysv/linux/timebits.h: Load <asm/param.h> only
if __USE_MISC.
* sysdeps/unix/sysv/linux/Dist: Add llseek.c.
Sat Dec 7 12:18:56 1996 Ulrich Drepper <drepper@cygnus.com>
* time/strftime (%c format): Remove %Z from default string.
Reported by Paul Eggert
* io/getwd.c: Don't apply getcwd on user supplied buffer.
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