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freebsd-dev/lib/libc/sys
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Konstantin Belousov bd6060a1c6 Switch libc from using _sig{procmask,action,suspend} symbols, which 
are aliases for the syscall stubs and are plt-interposed, to the
libc-private aliases of internally interposed sigprocmask() etc.

Since e.g. _sigaction is not interposed by libthr, calling signal()
removes thr_sighandler() from the handler slot etc.  The result was
breaking signal semantic and rtld locking.

The added __libc_sigprocmask and other symbols are hidden, they are
not exported and cannot be called through PLT.  The setjmp/longjmp
functions for x86 were changed to use direct calls, and since
PIC_PROLOGUE only needed for functional PLT indirection on i386, it is
removed as well.

The PowerPC bug of calling the syscall directly in the setjmp/longjmp
implementation is kept as is.

Reported by:	Pete French <petefrench@ingresso.co.uk>
Tested by:	Michiel Boland <boland37@xs4all.nl>
Reviewed by:	jilles (previous version)
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-08-29 14:25:01 +00:00
..
__error.c Avoid calling internal libc function through PLT or accessing data 2015-01-05 01:06:54 +00:00
__vdso_gettimeofday.c Copy the fencing of the algorithm to do lock-less update and reading 2015-08-04 12:33:51 +00:00
_exit.2
abort2.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
accept4.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
accept.2 accept(2) may and can return EAGAIN, document it. 2014-10-10 03:05:55 +00:00
accept.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
access.2 Various mdoc fixes and a few EOL whitespace removals. 2014-12-21 12:36:36 +00:00
acct.2
adjtime.2
aio_cancel.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
aio_error.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
aio_fsync.2 - Fix EBADF description, in following the future POSIX tc and what FreeBSD 2013-12-27 16:57:38 +00:00
aio_mlock.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
aio_read.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
aio_return.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
aio_suspend.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
aio_suspend.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
aio_waitcomplete.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
aio_write.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
bind.2 Document EINVAL as per POSIX. 2014-06-26 10:21:00 +00:00
bindat.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
brk.2
cap_enter.2 Update system man pages for s/capability.h/capsicum.h/. 2014-03-27 21:43:00 +00:00
cap_fcntls_limit.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
cap_ioctls_limit.2 forgot to bump date, and replace contraction (igor)... 2015-03-07 03:48:32 +00:00
cap_rights_limit.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
chdir.2
chflags.2 Add some missing .Nm for newer syscalls in existing man pages. 2014-01-11 22:00:16 +00:00
chmod.2 chmod(2): Document S_ISVTX following SUSv3/SUSv4. 2013-12-01 12:24:57 +00:00
chown.2
chroot.2 - Use standard RETURN VALUES section. 2013-01-15 14:09:08 +00:00
clock_gettime.2 mdoc: drop redundant .Pp and .LP calls 2010-10-08 12:40:16 +00:00
clock_gettime.c Use struct vdso_timehands data to implement fast gettimeofday(2) and 2012-06-22 07:13:30 +00:00
close.2 Consistently reference file descriptors as "fd". 55 other manpages 2013-09-12 00:53:38 +00:00
close.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
closefrom.2 Reassign copyright statements on several files from Advanced 2015-04-23 14:22:20 +00:00
connect.2 Document [EPERM] for UNIX sockets. 2014-09-30 00:06:53 +00:00
connect.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
connectat.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
cpuset_getaffinity.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
cpuset.2 Document CPU_WHICH_DOMAIN and bump Dd for cpuset.1. 2015-01-08 18:53:11 +00:00
dup.2 Add man page dup3(3). 2013-08-16 13:16:27 +00:00
execve.2 Fix exec_imgact_shell()'s handling of two error cases: (1) Previously, if 2010-09-21 16:24:51 +00:00
extattr_get_file.2 Fix return type of extattr_set_* and fix rmextattr(8) utility. 2013-04-02 05:30:41 +00:00
fcntl.2 Make the F_READAHEAD option to fcntl(2) work as documented: a value of zero 2013-02-13 15:09:16 +00:00
fcntl.c The lseek(2), mmap(2), truncate(2), ftruncate(2), pread(2), and 2015-04-18 21:50:13 +00:00
ffclock.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
fhopen.2
flock.2 Document that flock can return ENOLCK 2011-11-10 06:20:18 +00:00
fork.2 fork(2): Add a note to the effect that kqueue descriptors, unlike other 2015-05-02 00:29:27 +00:00
fork.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
fsync.2
fsync.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
futimens.c Add futimens and utimensat system calls. 2015-01-23 21:07:08 +00:00
getdirentries.2 Various mdoc fixes and a few EOL whitespace removals. 2014-12-21 12:36:36 +00:00
getdtablesize.2 getdtablesize(2): Describe what this function actually does. 2013-04-24 21:24:35 +00:00
getfh.2 getfh(2): Add xrefs for fhopen(2), open(2), stat(2). 2011-04-14 22:06:11 +00:00
getfsstat.2
getgid.2
getgroups.2 getgroups(2): Remove mention of <sys/param.h> and refer to sysconf(3). 2011-01-21 22:15:17 +00:00
getitimer.2 mdoc: remove literal tabs where they don't belong 2010-06-08 16:48:59 +00:00
getlogin.2
getloginclass.2 Add manual page for getloginclass(2) and setloginclass(2). 2011-03-06 08:35:50 +00:00
getpeername.2 Document that getpeername(2) and getsockname(2) can fail with EINVAL. 2012-11-23 10:14:54 +00:00
getpgrp.2
getpid.2
getpriority.2 mdoc: make pages render with mandoc 2010-10-21 12:27:13 +00:00
getrlimit.2 getrlimit.2: Document RSS, AS/VMEM limit behavior more clearly 2015-08-20 00:00:15 +00:00
getrusage.2 mdoc: remove literal tabs where they don't belong 2010-06-08 16:48:59 +00:00
getsid.2
getsockname.2 Document that getpeername(2) and getsockname(2) can fail with EINVAL. 2012-11-23 10:14:54 +00:00
getsockopt.2 Correct the returned message lengths for timeval and bintime control 2013-04-05 18:09:43 +00:00
gettimeofday.2 mdoc: drop redundant .Pp and .LP calls 2010-10-08 12:40:16 +00:00
gettimeofday.c Rework the __vdso_* symbols attributes to only make the symbols weak, 2013-01-30 12:48:16 +00:00
getuid.2
interposing_table.c The lseek(2), mmap(2), truncate(2), ftruncate(2), pread(2), and 2015-04-18 21:50:13 +00:00
intro.2 mdoc: remove superfluous paragraph macros. 2014-06-23 18:40:21 +00:00
ioctl.2 Consistently reference file descriptors as "fd". 55 other manpages 2013-09-12 00:53:38 +00:00
issetugid.2
jail.2 A new jail(8) with a configuration file, ultimately to replace the work 2012-04-26 17:36:05 +00:00
kenv.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
kevent.c Make kevent(2) a cancellation point. 2015-03-29 19:14:41 +00:00
kill.2 Update the kill(2) and killpg(2) man pages to the modern permission 2012-10-22 03:37:00 +00:00
kldfind.2
kldfirstmod.2
kldload.2
kldnext.2
kldstat.2 Fix comment to specify correct struct name. 2012-03-28 23:51:06 +00:00
kldsym.2 mdoc: drop redundant .Pp and .LP calls 2010-10-08 12:40:16 +00:00
kldunload.2
kqueue.2 Make it possible to implement poll(2) on top of kqueue(2). 2015-08-05 07:34:29 +00:00
kse.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
ktrace.2 General mdoc(7) and typo fixes. 2012-05-08 18:56:21 +00:00
link.2 Correct AT_SYMLINK_FOLLOW flag name in linkat(2) man page. 2009-07-19 16:48:25 +00:00
lio_listio.2
listen.2 Document that listen(2) can fail with EDESTADDRREQ. 2014-07-15 02:21:51 +00:00
lseek.2 Clarify the SEEK_HOLE description, it repositions the file pointer. 2012-05-26 05:25:55 +00:00
madvise.2 Correct the description of MADV_DONTNEED. Specifically, after using 2015-07-12 19:18:19 +00:00
Makefile.inc Move the stack protector to a new "secure" directory 2015-08-14 03:03:13 +00:00
mincore.2
minherit.2
mkdir.2
mkfifo.2
mknod.2 mknod(2): The required include is <sys/stat.h>, not <unistd.h>. 2011-01-16 21:59:50 +00:00
mlock.2 Minor mdoc fix 2014-05-30 02:16:28 +00:00
mlockall.2 - Update manual pages accordingly to r244384 and r244385. 2012-12-25 13:43:01 +00:00
mmap.2 fix spelling, add comma and remove BUGS section.. it provided no useful 2015-02-19 01:51:17 +00:00
modfind.2
modnext.2
modstat.2 mdoc: drop redundant .Pp and .LP calls 2010-10-08 12:40:16 +00:00
mount.2 Remove obsolete bits about maximum number of file systems. 2015-04-12 21:14:58 +00:00
mprotect.2
mq_close.2 mdoc: remove literal tabs where they don't belong 2010-06-08 16:48:59 +00:00
mq_getattr.2 Match the correct variable to the variable description. 2014-02-21 13:53:41 +00:00
mq_notify.2 mdoc: remove literal tabs where they don't belong 2010-06-08 16:48:59 +00:00
mq_open.2 document mqueuefs is required for mq_open... 2014-09-15 22:32:35 +00:00
mq_receive.2 mdoc: remove literal tabs where they don't belong 2010-06-08 16:48:59 +00:00
mq_send.2 mdoc: remove literal tabs where they don't belong 2010-06-08 16:48:59 +00:00
mq_setattr.2 mq_setattr(2): Add missing const to man page. 2011-05-17 21:03:34 +00:00
msgctl.2 Move msg{snd,recv,get,ctl} manual pages from section 3 to 2. 2009-07-13 12:53:43 +00:00
msgget.2 Move msg{snd,recv,get,ctl} manual pages from section 3 to 2. 2009-07-13 12:53:43 +00:00
msgrcv.2 Move msg{snd,recv,get,ctl} manual pages from section 3 to 2. 2009-07-13 12:53:43 +00:00
msgsnd.2 General mdoc(7) and typo fixes. 2012-05-08 18:56:21 +00:00
msync.2 msync(2) must return ENOMEM and not EINVAL when the address is outside the 2014-05-07 08:38:02 +00:00
msync.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
munmap.2
nanosleep.2 In nanosleep(2), note that the calling thread is put to sleep, not the 2009-10-11 16:23:11 +00:00
nanosleep.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
nfssvc.2 Globally replace u_int*_t from (non-contributed) man pages. 2012-02-12 18:29:56 +00:00
ntp_adjtime.2 Fix typos, spelling, formatting and mdoc mistakes found by Nobuyuki while 2010-08-16 15:18:30 +00:00
numa_getaffinity.2 Add an initial NUMA affinity/policy configuration for threads and processes. 2015-07-11 15:21:37 +00:00
open.2 Fix markup. 2015-07-07 19:23:59 +00:00
open.c Reduce the size of the interposing table and amount of 2015-01-11 22:16:31 +00:00
openat.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
pathconf.2 General mdoc(7) and typo fixes. 2012-05-08 18:56:21 +00:00
pdfork.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
pipe.2 Add some missing .Nm for newer syscalls in existing man pages. 2014-01-11 22:00:16 +00:00
poll.2 Various mdoc fixes and a few EOL whitespace removals. 2014-12-21 12:36:36 +00:00
poll.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
posix_fadvise.2 The posix_madvise(3) and posix_fadvise(2) should return error on 2014-01-30 18:04:39 +00:00
posix_fallocate.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
posix_openpt.2 Escape "Ed" 2015-04-26 10:52:37 +00:00
ppoll.c Make wait6(2), waitid(3) and ppoll(2) cancellation points. The 2015-04-18 21:35:41 +00:00
procctl.2 Editing pass on procctl.2 2015-08-21 02:42:14 +00:00
profil.2
pselect.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
pselect.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
ptrace.2 Grammar and language fixes. 2015-07-03 17:30:31 +00:00
quotactl.2 Remove trailing whitespace per mdoc lint warning 2012-03-29 05:02:12 +00:00
read.2 Consistently reference file descriptors as "fd". 55 other manpages 2013-09-12 00:53:38 +00:00
read.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
readlink.2
readv.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
reboot.2 Add missing capitalization. 2015-07-24 18:13:13 +00:00
recv.2 Slightly improve grammar in EAGAIN description. 2014-10-15 23:39:47 +00:00
recvfrom.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
recvmsg.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
rename.2
revoke.2 Various mdoc fixes and a few EOL whitespace removals. 2014-12-21 12:36:36 +00:00
rfork.2 Document RFTSIGZMB. Fix spelling of SIGCHLD. Note that signals are 2011-07-12 20:38:42 +00:00
rmdir.2
rtprio.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
sched_get_priority_max.2
sched_setparam.2
sched_setscheduler.2 Various mdoc fixes and a few EOL whitespace removals. 2014-12-21 12:36:36 +00:00
sched_yield.2
sctp_generic_recvmsg.2 Remove the advertising clause from the Regents of the University of 2013-05-28 21:05:06 +00:00
sctp_generic_sendmsg.2 Remove the advertising clause from the Regents of the University of 2013-05-28 21:05:06 +00:00
sctp_peeloff.2 Remove the advertising clause from the Regents of the University of 2013-05-28 21:05:06 +00:00
select.2 Remove trailing whitespace per mdoc lint warning 2012-03-29 05:02:12 +00:00
select.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
semctl.2 Make the structure definitions in the man pages match the real code, and 2009-06-29 18:54:17 +00:00
semget.2
semop.2 Fix incorrect usage of 'assure' and 'insure'. 2010-08-28 16:32:01 +00:00
send.2
sendfile.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
sendmsg.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
sendto.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
setcontext.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
setfib.2 Update the setfib man page to reflect recent changes. 2013-05-20 20:47:40 +00:00
setgroups.2 In preparation for raising NGROUPS and NGROUPS_MAX, change base 2009-06-19 15:58:24 +00:00
setpgid.2 Describe what setpgid(2) does when pgid=0. The text has been 2009-12-01 06:12:31 +00:00
setregid.2
setresuid.2 Remove useless comment. 2015-02-07 13:11:45 +00:00
setreuid.2
setsid.2
setuid.2 Make man page wording more clear: 2012-01-15 20:14:52 +00:00
shm_open.2 use .Mt to mark up email addresses consistently (part4) 2014-06-23 08:25:03 +00:00
shmat.2 Update shmget(2) with POSIX access permissions and remove non-standard SHM_R, 2010-12-17 21:10:08 +00:00
shmctl.2 Update shmget(2) with POSIX access permissions and remove non-standard SHM_R, 2010-12-17 21:10:08 +00:00
shmget.2 Sort cross references by section. 2010-12-18 10:09:07 +00:00
shutdown.2 Make shutdown() return ENOTCONN as required by POSIX, part deux. 2015-07-27 13:17:57 +00:00
sigaction.2 Update some signal man pages for multithreading. 2013-09-06 09:08:40 +00:00
sigaction.c Switch libc from using _sig{procmask,action,suspend} symbols, which 2015-08-29 14:25:01 +00:00
sigaltstack.2 Use NULL instead of 0 for pointer in example. 2010-08-29 16:38:08 +00:00
sigpending.2 Update some signal man pages for multithreading. 2013-09-06 09:08:40 +00:00
sigprocmask.2 sigprocmask(2): pthread_sigmask(3) must be used in threaded processes. 2010-05-07 20:46:22 +00:00
sigprocmask.c Switch libc from using _sig{procmask,action,suspend} symbols, which 2015-08-29 14:25:01 +00:00
sigqueue.2 sigqueue(2): Fix typo (EEPERM -> EPERM). 2013-02-10 13:20:23 +00:00
sigreturn.2 Update some signal man pages for multithreading. 2013-09-06 09:08:40 +00:00
sigstack.2
sigsuspend.2 sigsuspend(2): Add xrefs to pselect(2) and sigwait-alikes. 2013-08-15 22:33:27 +00:00
sigsuspend.c Switch libc from using _sig{procmask,action,suspend} symbols, which 2015-08-29 14:25:01 +00:00
sigtimedwait.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
sigwait.2 Update some signal man pages for multithreading. 2013-09-06 09:08:40 +00:00
sigwait.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
sigwaitinfo.2 Various mdoc fixes and a few EOL whitespace removals. 2014-12-21 12:36:36 +00:00
sigwaitinfo.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
socket.2 Catch up with many years of changes: 2014-06-24 20:23:18 +00:00
socketpair.2 Partially revert r255486, the first argument to socketpair() is a socket 2015-05-04 14:23:31 +00:00
stat.2 Remove invalid remark about pipes. 2012-06-02 10:50:25 +00:00
statfs.2
swapcontext.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
swapon.2 The compile time constant limit on number of swap devices was removed in 5.2. 2013-12-25 16:01:29 +00:00
Symbol.map Remove a stale comment and clarify the original where it was taken from 2015-08-14 14:58:04 +00:00
symlink.2
sync.2 syncer(4) is a kernel process, not a user process 2014-02-27 04:06:34 +00:00
sysarch.2
syscall.2
timer_create.2 General mdoc(7) and typo fixes. 2012-05-08 18:56:21 +00:00
timer_delete.2 General mdoc(7) and typo fixes. 2012-05-08 18:56:21 +00:00
timer_settime.2 General mdoc(7) and typo fixes. 2012-05-08 18:56:21 +00:00
trivial-vdso_tc.c libc: Eliminate duplicate copies of __vdso_gettc.c 2015-04-02 21:18:11 +00:00
truncate.2 Various updates to the ftruncate(2) documentation: 2015-05-04 14:47:00 +00:00
umask.2
undelete.2
unlink.2 unlink(2): Note the possibility for ENOSPC to be returned on ZFS. 2015-07-28 22:48:58 +00:00
utimensat.2 Add futimens and utimensat system calls. 2015-01-23 21:07:08 +00:00
utimensat.c Add futimens and utimensat system calls. 2015-01-23 21:07:08 +00:00
utimes.2 Note that most errors are possible for all syscalls from utimes(2) 2014-07-03 11:19:16 +00:00
utrace.2 <sys/param.h> is a superset of <sys/types.h> and must always come 2014-11-01 09:10:21 +00:00
uuidgen.2
vfork.2 vfork() first appeared in 3BSD which pre-dates 2.9BSD. Verified via the 2015-04-06 20:40:01 +00:00
wait4.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
wait6.c Make wait6(2), waitid(3) and ppoll(2) cancellation points. The 2015-04-18 21:35:41 +00:00
wait.2 The si_status field of the siginfo_t, provided by the waitid(2) and 2015-07-18 09:02:50 +00:00
write.2 Consistently reference file descriptors as "fd". 55 other manpages 2013-09-12 00:53:38 +00:00
write.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
writev.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00