diff --git a/lib/libc/gen/Makefile.inc b/lib/libc/gen/Makefile.inc index dd9af85..e5ca3fa 100644 --- a/lib/libc/gen/Makefile.inc +++ b/lib/libc/gen/Makefile.inc @@ -21,7 +21,7 @@ SRCS+= __getosreldate.c __xuname.c \ initgroups.c isatty.c isinf.c isnan.c jrand48.c lcong48.c \ lockf.c lrand48.c mrand48.c nftw.c nice.c \ nlist.c nrand48.c opendir.c \ - pause.c pmadvise.c popen.c posix_spawn.c pselect.c \ + pause.c pmadvise.c popen.c posix_spawn.c \ psignal.c pw_scan.c pwcache.c \ raise.c readdir.c readpassphrase.c rewinddir.c \ scandir.c seed48.c seekdir.c sem.c semctl.c \ diff --git a/lib/libc/gen/Symbol.map b/lib/libc/gen/Symbol.map index 6fb61b1..a3ea75b 100644 --- a/lib/libc/gen/Symbol.map +++ b/lib/libc/gen/Symbol.map @@ -223,7 +223,6 @@ FBSD_1.0 { posix_madvise; popen; pclose; - pselect; psignal; raise; readdir; @@ -454,7 +453,6 @@ FBSDprivate_1.0 { __opendir2; __pause; _pause; - __pselect; __pw_scan; /* Used by (at least) libutil */ __raise; _raise; diff --git a/lib/libc/gen/pselect.3 b/lib/libc/gen/pselect.3 index a56a0a8..8e306d6 100644 --- a/lib/libc/gen/pselect.3 +++ b/lib/libc/gen/pselect.3 @@ -88,11 +88,6 @@ for a more detailed discussion of the semantics of this interface, and for macros used to manipulate the .Vt "fd_set" data type. -.Sh IMPLEMENTATION NOTES -The -.Fn pselect -function is implemented in the C library as a wrapper around -.Fn select . .Sh RETURN VALUES The .Fn pselect diff --git a/lib/libc/gen/pselect.c b/lib/libc/gen/pselect.c deleted file mode 100644 index 28066a2..0000000 --- a/lib/libc/gen/pselect.c +++ /dev/null @@ -1,78 +0,0 @@ -/* - * Copyright 2000 Massachusetts Institute of Technology - * - * Permission to use, copy, modify, and distribute this software and - * its documentation for any purpose and without fee is hereby - * granted, provided that both the above copyright notice and this - * permission notice appear in all copies, that both the above - * copyright notice and this permission notice appear in all - * supporting documentation, and that the name of M.I.T. not be used - * in advertising or publicity pertaining to distribution of the - * software without specific, written prior permission. M.I.T. makes - * no representations about the suitability of this software for any - * purpose. It is provided "as is" without express or implied - * warranty. - * - * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS - * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, - * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT - * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT - * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include -__FBSDID("$FreeBSD$"); - -#include "namespace.h" -#include -#include - -#include -#include -#include "un-namespace.h" - -__weak_reference(__pselect, pselect); - -/* - * Emulate the POSIX 1003.1g-2000 `pselect' interface. This is the - * same as the traditional BSD `select' function, except that it uses - * a timespec rather than a timeval, doesn't modify the timeout argument, - * and allows the user to specify a signal mask to apply during the select. - */ -int -__pselect(int count, fd_set * __restrict rfds, fd_set * __restrict wfds, - fd_set * __restrict efds, const struct timespec * __restrict timo, - const sigset_t * __restrict mask) -{ - sigset_t omask; - struct timeval tvtimo, *tvp; - int rv, sverrno; - - if (timo) { - TIMESPEC_TO_TIMEVAL(&tvtimo, timo); - tvp = &tvtimo; - } else - tvp = 0; - - if (mask != 0) { - rv = _sigprocmask(SIG_SETMASK, mask, &omask); - if (rv != 0) - return rv; - } - - rv = _select(count, rfds, wfds, efds, tvp); - if (mask != 0) { - sverrno = errno; - _sigprocmask(SIG_SETMASK, &omask, (sigset_t *)0); - errno = sverrno; - } - - return rv; -} diff --git a/lib/libc/sys/Symbol.map b/lib/libc/sys/Symbol.map index c834a25..ce6f32a 100644 --- a/lib/libc/sys/Symbol.map +++ b/lib/libc/sys/Symbol.map @@ -211,6 +211,7 @@ FBSD_1.0 { posix_openpt; preadv; profil; + pselect; ptrace; pwritev; quotactl; @@ -781,6 +782,8 @@ FBSDprivate_1.0 { __sys_preadv; _profil; __sys_profil; + _pselect; + __sys_pselect; _ptrace; __sys_ptrace; _pwritev; diff --git a/lib/libthr/thread/thr_syscalls.c b/lib/libthr/thread/thr_syscalls.c index d05d68b..92670a9 100644 --- a/lib/libthr/thread/thr_syscalls.c +++ b/lib/libthr/thread/thr_syscalls.c @@ -104,6 +104,8 @@ extern int __sys_accept(int, struct sockaddr *, socklen_t *); extern int __sys_connect(int, const struct sockaddr *, socklen_t); extern int __sys_fsync(int); extern int __sys_msync(void *, size_t, int); +extern int __sys_pselect(int, fd_set *, fd_set *, fd_set *, + const struct timespec *, const sigset_t *); extern int __sys_poll(struct pollfd *, unsigned, int); extern ssize_t __sys_recv(int, void *, size_t, int); extern ssize_t __sys_recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *); @@ -394,7 +396,7 @@ ___pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds, int ret; _thr_cancel_enter(curthread); - ret = __pselect(count, rfds, wfds, efds, timo, mask); + ret = __sys_pselect(count, rfds, wfds, efds, timo, mask); _thr_cancel_leave(curthread); return (ret); diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c index 95db5d2..ebb7805 100644 --- a/sys/amd64/amd64/machdep.c +++ b/sys/amd64/amd64/machdep.c @@ -415,7 +415,7 @@ sigreturn(td, uap) ucontext_t uc; struct proc *p = td->td_proc; struct trapframe *regs; - const ucontext_t *ucp; + ucontext_t *ucp; long rflags; int cs, error, ret; ksiginfo_t ksi; @@ -478,7 +478,6 @@ sigreturn(td, uap) td->td_pcb->pcb_fsbase = ucp->uc_mcontext.mc_fsbase; td->td_pcb->pcb_gsbase = ucp->uc_mcontext.mc_gsbase; - PROC_LOCK(p); #if defined(COMPAT_43) if (ucp->uc_mcontext.mc_onstack & 1) td->td_sigstk.ss_flags |= SS_ONSTACK; @@ -486,10 +485,7 @@ sigreturn(td, uap) td->td_sigstk.ss_flags &= ~SS_ONSTACK; #endif - td->td_sigmask = ucp->uc_sigmask; - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &ucp->uc_sigmask, NULL, 0); td->td_pcb->pcb_flags |= PCB_FULLCTX; td->td_pcb->pcb_full_iret = 1; return (EJUSTRETURN); diff --git a/sys/amd64/ia32/ia32_signal.c b/sys/amd64/ia32/ia32_signal.c index d7c1dd5..10ec641 100644 --- a/sys/amd64/ia32/ia32_signal.c +++ b/sys/amd64/ia32/ia32_signal.c @@ -244,10 +244,8 @@ freebsd32_setcontext(struct thread *td, struct freebsd32_setcontext_args *uap) if (ret == 0) { ret = ia32_set_mcontext(td, &uc.uc_mcontext); if (ret == 0) { - SIG_CANTMASK(uc.uc_sigmask); - PROC_LOCK(td->td_proc); - td->td_sigmask = uc.uc_sigmask; - PROC_UNLOCK(td->td_proc); + kern_sigprocmask(td, SIG_SETMASK, + &uc.uc_sigmask, NULL, 0); } } } @@ -273,10 +271,8 @@ freebsd32_swapcontext(struct thread *td, struct freebsd32_swapcontext_args *uap) if (ret == 0) { ret = ia32_set_mcontext(td, &uc.uc_mcontext); if (ret == 0) { - SIG_CANTMASK(uc.uc_sigmask); - PROC_LOCK(td->td_proc); - td->td_sigmask = uc.uc_sigmask; - PROC_UNLOCK(td->td_proc); + kern_sigprocmask(td, SIG_SETMASK, + &uc.uc_sigmask, NULL, 0); } } } @@ -544,9 +540,8 @@ freebsd4_freebsd32_sigreturn(td, uap) } */ *uap; { struct ia32_ucontext4 uc; - struct proc *p = td->td_proc; struct trapframe *regs; - const struct ia32_ucontext4 *ucp; + struct ia32_ucontext4 *ucp; int cs, eflags, error; ksiginfo_t ksi; @@ -610,11 +605,7 @@ freebsd4_freebsd32_sigreturn(td, uap) regs->tf_fs = ucp->uc_mcontext.mc_fs; regs->tf_gs = ucp->uc_mcontext.mc_gs; - PROC_LOCK(p); - td->td_sigmask = ucp->uc_sigmask; - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &ucp->uc_sigmask, NULL, 0); td->td_pcb->pcb_full_iret = 1; return (EJUSTRETURN); } @@ -631,9 +622,8 @@ freebsd32_sigreturn(td, uap) } */ *uap; { struct ia32_ucontext uc; - struct proc *p = td->td_proc; struct trapframe *regs; - const struct ia32_ucontext *ucp; + struct ia32_ucontext *ucp; int cs, eflags, error, ret; ksiginfo_t ksi; @@ -702,11 +692,7 @@ freebsd32_sigreturn(td, uap) regs->tf_gs = ucp->uc_mcontext.mc_gs; regs->tf_flags = TF_HASSEGS; - PROC_LOCK(p); - td->td_sigmask = ucp->uc_sigmask; - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &ucp->uc_sigmask, NULL, 0); td->td_pcb->pcb_full_iret = 1; return (EJUSTRETURN); } diff --git a/sys/amd64/linux32/linux32_sysvec.c b/sys/amd64/linux32/linux32_sysvec.c index 54a04ee..6e3e326 100644 --- a/sys/amd64/linux32/linux32_sysvec.c +++ b/sys/amd64/linux32/linux32_sysvec.c @@ -565,9 +565,9 @@ linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) int linux_sigreturn(struct thread *td, struct linux_sigreturn_args *args) { - struct proc *p = td->td_proc; struct l_sigframe frame; struct trapframe *regs; + sigset_t bmask; l_sigset_t lmask; int eflags, i; ksiginfo_t ksi; @@ -623,11 +623,8 @@ linux_sigreturn(struct thread *td, struct linux_sigreturn_args *args) lmask.__bits[0] = frame.sf_sc.sc_mask; for (i = 0; i < (LINUX_NSIG_WORDS-1); i++) lmask.__bits[i+1] = frame.sf_extramask[i]; - PROC_LOCK(p); - linux_to_bsd_sigset(&lmask, &td->td_sigmask); - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + linux_to_bsd_sigset(&lmask, &bmask); + kern_sigprocmask(td, SIG_SETMASK, &bmask, NULL, 0); /* * Restore signal context. @@ -666,9 +663,9 @@ linux_sigreturn(struct thread *td, struct linux_sigreturn_args *args) int linux_rt_sigreturn(struct thread *td, struct linux_rt_sigreturn_args *args) { - struct proc *p = td->td_proc; struct l_ucontext uc; struct l_sigcontext *context; + sigset_t bmask; l_stack_t *lss; stack_t ss; struct trapframe *regs; @@ -725,11 +722,8 @@ linux_rt_sigreturn(struct thread *td, struct linux_rt_sigreturn_args *args) return(EINVAL); } - PROC_LOCK(p); - linux_to_bsd_sigset(&uc.uc_sigmask, &td->td_sigmask); - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + linux_to_bsd_sigset(&uc.uc_sigmask, &bmask); + kern_sigprocmask(td, SIG_SETMASK, &bmask, NULL, 0); /* * Restore signal context diff --git a/sys/arm/arm/machdep.c b/sys/arm/arm/machdep.c index 597cdf5..f49319e 100644 --- a/sys/arm/arm/machdep.c +++ b/sys/arm/arm/machdep.c @@ -605,7 +605,6 @@ sigreturn(td, uap) const struct __ucontext *sigcntxp; } */ *uap; { - struct proc *p = td->td_proc; struct sigframe sf; struct trapframe *tf; int spsr; @@ -627,11 +626,7 @@ sigreturn(td, uap) set_mcontext(td, &sf.sf_uc.uc_mcontext); /* Restore signal mask. */ - PROC_LOCK(p); - td->td_sigmask = sf.sf_uc.uc_sigmask; - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &sf.sf_uc.uc_sigmask, NULL, 0); return (EJUSTRETURN); } diff --git a/sys/compat/freebsd32/freebsd32_misc.c b/sys/compat/freebsd32/freebsd32_misc.c index 71b22aa..1d8486b 100644 --- a/sys/compat/freebsd32/freebsd32_misc.c +++ b/sys/compat/freebsd32/freebsd32_misc.c @@ -593,6 +593,41 @@ freebsd32_select(struct thread *td, struct freebsd32_select_args *uap) sizeof(int32_t) * 8)); } +int +freebsd32_pselect(struct thread *td, struct freebsd32_pselect_args *uap) +{ + struct timespec32 ts32; + struct timespec ts; + struct timeval tv, *tvp; + sigset_t set, *uset; + int error; + + if (uap->ts != NULL) { + error = copyin(uap->ts, &ts32, sizeof(ts32)); + if (error != 0) + return (error); + CP(ts32, ts, tv_sec); + CP(ts32, ts, tv_nsec); + TIMESPEC_TO_TIMEVAL(&tv, &ts); + tvp = &tv; + } else + tvp = NULL; + if (uap->sm != NULL) { + error = copyin(uap->sm, &set, sizeof(set)); + if (error != 0) + return (error); + uset = &set; + } else + uset = NULL; + /* + * XXX big-endian needs to convert the fd_sets too. + * XXX Do pointers need PTRIN()? + */ + error = kern_pselect(td, uap->nd, uap->in, uap->ou, uap->ex, tvp, + uset, sizeof(int32_t) * 8); + return (error); +} + /* * Copy 'count' items into the destination list pointed to by uap->eventlist. */ @@ -2482,7 +2517,7 @@ ofreebsd32_sigprocmask(struct thread *td, int error; OSIG2SIG(uap->mask, set); - error = kern_sigprocmask(td, uap->how, &set, &oset, 1); + error = kern_sigprocmask(td, uap->how, &set, &oset, SIGPROCMASK_OLD); SIG2OSIG(oset, td->td_retval[0]); return (error); } diff --git a/sys/compat/freebsd32/syscalls.master b/sys/compat/freebsd32/syscalls.master index 833b1e5..865f0c1 100644 --- a/sys/compat/freebsd32/syscalls.master +++ b/sys/compat/freebsd32/syscalls.master @@ -909,3 +909,7 @@ 519 AUE_PDKILL UNIMPL pdkill 520 AUE_PDGETPID UNIMPL pdgetpid 521 AUE_PDWAIT UNIMPL pdwait +522 AUE_SELECT STD { int freebsd32_pselect(int nd, fd_set *in, \ + fd_set *ou, fd_set *ex, \ + const struct timespec32 *ts, \ + const sigset_t *sm); } diff --git a/sys/i386/i386/machdep.c b/sys/i386/i386/machdep.c index 96c8f25..5c294eb 100644 --- a/sys/i386/i386/machdep.c +++ b/sys/i386/i386/machdep.c @@ -756,7 +756,6 @@ osigreturn(td, uap) struct osigcontext sc; struct trapframe *regs; struct osigcontext *scp; - struct proc *p = td->td_proc; int eflags, error; ksiginfo_t ksi; @@ -856,17 +855,14 @@ osigreturn(td, uap) regs->tf_eip = scp->sc_pc; regs->tf_eflags = eflags; - PROC_LOCK(p); #if defined(COMPAT_43) if (scp->sc_onstack & 1) td->td_sigstk.ss_flags |= SS_ONSTACK; else td->td_sigstk.ss_flags &= ~SS_ONSTACK; #endif - SIGSETOLD(td->td_sigmask, scp->sc_mask); - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, (sigset_t *)&scp->sc_mask, NULL, + SIGPROCMASK_OLD); return (EJUSTRETURN); } #endif /* COMPAT_43 */ @@ -883,9 +879,8 @@ freebsd4_sigreturn(td, uap) } */ *uap; { struct ucontext4 uc; - struct proc *p = td->td_proc; struct trapframe *regs; - const struct ucontext4 *ucp; + struct ucontext4 *ucp; int cs, eflags, error; ksiginfo_t ksi; @@ -973,18 +968,13 @@ freebsd4_sigreturn(td, uap) bcopy(&ucp->uc_mcontext.mc_fs, regs, sizeof(*regs)); } - PROC_LOCK(p); #if defined(COMPAT_43) if (ucp->uc_mcontext.mc_onstack & 1) td->td_sigstk.ss_flags |= SS_ONSTACK; else td->td_sigstk.ss_flags &= ~SS_ONSTACK; #endif - - td->td_sigmask = ucp->uc_sigmask; - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &ucp->uc_sigmask, NULL, 0); return (EJUSTRETURN); } #endif /* COMPAT_FREEBSD4 */ @@ -1000,9 +990,8 @@ sigreturn(td, uap) } */ *uap; { ucontext_t uc; - struct proc *p = td->td_proc; struct trapframe *regs; - const ucontext_t *ucp; + ucontext_t *ucp; int cs, eflags, error, ret; ksiginfo_t ksi; @@ -1094,7 +1083,6 @@ sigreturn(td, uap) bcopy(&ucp->uc_mcontext.mc_fs, regs, sizeof(*regs)); } - PROC_LOCK(p); #if defined(COMPAT_43) if (ucp->uc_mcontext.mc_onstack & 1) td->td_sigstk.ss_flags |= SS_ONSTACK; @@ -1102,10 +1090,7 @@ sigreturn(td, uap) td->td_sigstk.ss_flags &= ~SS_ONSTACK; #endif - td->td_sigmask = ucp->uc_sigmask; - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &ucp->uc_sigmask, NULL, 0); return (EJUSTRETURN); } diff --git a/sys/i386/linux/linux_sysvec.c b/sys/i386/linux/linux_sysvec.c index d07f655..069b5bb 100644 --- a/sys/i386/linux/linux_sysvec.c +++ b/sys/i386/linux/linux_sysvec.c @@ -667,10 +667,10 @@ linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) int linux_sigreturn(struct thread *td, struct linux_sigreturn_args *args) { - struct proc *p = td->td_proc; struct l_sigframe frame; struct trapframe *regs; l_sigset_t lmask; + sigset_t bmask; int eflags, i; ksiginfo_t ksi; @@ -725,11 +725,8 @@ linux_sigreturn(struct thread *td, struct linux_sigreturn_args *args) lmask.__bits[0] = frame.sf_sc.sc_mask; for (i = 0; i < (LINUX_NSIG_WORDS-1); i++) lmask.__bits[i+1] = frame.sf_extramask[i]; - PROC_LOCK(p); - linux_to_bsd_sigset(&lmask, &td->td_sigmask); - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + linux_to_bsd_sigset(&lmask, &bmask); + kern_sigprocmask(td, SIG_SETMASK, &bmask, NULL, 0); /* * Restore signal context. @@ -767,9 +764,9 @@ linux_sigreturn(struct thread *td, struct linux_sigreturn_args *args) int linux_rt_sigreturn(struct thread *td, struct linux_rt_sigreturn_args *args) { - struct proc *p = td->td_proc; struct l_ucontext uc; struct l_sigcontext *context; + sigset_t bmask; l_stack_t *lss; stack_t ss; struct trapframe *regs; @@ -826,11 +823,8 @@ linux_rt_sigreturn(struct thread *td, struct linux_rt_sigreturn_args *args) return(EINVAL); } - PROC_LOCK(p); - linux_to_bsd_sigset(&uc.uc_sigmask, &td->td_sigmask); - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + linux_to_bsd_sigset(&uc.uc_sigmask, &bmask); + kern_sigprocmask(td, SIG_SETMASK, &bmask, NULL, 0); /* * Restore signal context diff --git a/sys/ia64/ia64/machdep.c b/sys/ia64/ia64/machdep.c index 67ca3c2..299c9ec 100644 --- a/sys/ia64/ia64/machdep.c +++ b/sys/ia64/ia64/machdep.c @@ -1056,11 +1056,9 @@ sigreturn(struct thread *td, { ucontext_t uc; struct trapframe *tf; - struct proc *p; struct pcb *pcb; tf = td->td_frame; - p = td->td_proc; pcb = td->td_pcb; /* @@ -1072,17 +1070,13 @@ sigreturn(struct thread *td, set_mcontext(td, &uc.uc_mcontext); - PROC_LOCK(p); #if defined(COMPAT_43) if (sigonstack(tf->tf_special.sp)) td->td_sigstk.ss_flags |= SS_ONSTACK; else td->td_sigstk.ss_flags &= ~SS_ONSTACK; #endif - td->td_sigmask = uc.uc_sigmask; - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); return (EJUSTRETURN); } diff --git a/sys/kern/kern_context.c b/sys/kern/kern_context.c index f951fca..6628eb6 100644 --- a/sys/kern/kern_context.c +++ b/sys/kern/kern_context.c @@ -89,10 +89,8 @@ setcontext(struct thread *td, struct setcontext_args *uap) if (ret == 0) { ret = set_mcontext(td, &uc.uc_mcontext); if (ret == 0) { - SIG_CANTMASK(uc.uc_sigmask); - PROC_LOCK(td->td_proc); - td->td_sigmask = uc.uc_sigmask; - PROC_UNLOCK(td->td_proc); + kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, + NULL, 0); } } } @@ -118,10 +116,8 @@ swapcontext(struct thread *td, struct swapcontext_args *uap) if (ret == 0) { ret = set_mcontext(td, &uc.uc_mcontext); if (ret == 0) { - SIG_CANTMASK(uc.uc_sigmask); - PROC_LOCK(td->td_proc); - td->td_sigmask = uc.uc_sigmask; - PROC_UNLOCK(td->td_proc); + kern_sigprocmask(td, SIG_SETMASK, + &uc.uc_sigmask, NULL, 0); } } } diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c index bc09686..92b90a5 100644 --- a/sys/kern/kern_sig.c +++ b/sys/kern/kern_sig.c @@ -970,14 +970,15 @@ execsigs(struct proc *p) */ int kern_sigprocmask(struct thread *td, int how, sigset_t *set, sigset_t *oset, - int old) + int flags) { sigset_t new_block, oset1; struct proc *p; int error; p = td->td_proc; - PROC_LOCK(p); + if (!(flags & SIGPROCMASK_PROC_LOCKED)) + PROC_LOCK(p); if (oset != NULL) *oset = td->td_sigmask; @@ -999,7 +1000,7 @@ kern_sigprocmask(struct thread *td, int how, sigset_t *set, sigset_t *oset, case SIG_SETMASK: SIG_CANTMASK(*set); oset1 = td->td_sigmask; - if (old) + if (flags & SIGPROCMASK_OLD) SIGSETLO(td->td_sigmask, *set); else td->td_sigmask = *set; @@ -1025,7 +1026,8 @@ kern_sigprocmask(struct thread *td, int how, sigset_t *set, sigset_t *oset, if (p->p_numthreads != 1) reschedule_signals(p, new_block); - PROC_UNLOCK(p); + if (!(flags & SIGPROCMASK_PROC_LOCKED)) + PROC_UNLOCK(p); return (error); } @@ -1394,15 +1396,11 @@ osigblock(td, uap) register struct thread *td; struct osigblock_args *uap; { - struct proc *p = td->td_proc; - sigset_t set; + sigset_t set, oset; OSIG2SIG(uap->mask, set); - SIG_CANTMASK(set); - PROC_LOCK(p); - SIG2OSIG(td->td_sigmask, td->td_retval[0]); - SIGSETOR(td->td_sigmask, set); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_BLOCK, &set, &oset, 0); + SIG2OSIG(oset, td->td_retval[0]); return (0); } @@ -1416,16 +1414,11 @@ osigsetmask(td, uap) struct thread *td; struct osigsetmask_args *uap; { - struct proc *p = td->td_proc; - sigset_t set; + sigset_t set, oset; OSIG2SIG(uap->mask, set); - SIG_CANTMASK(set); - PROC_LOCK(p); - SIG2OSIG(td->td_sigmask, td->td_retval[0]); - SIGSETLO(td->td_sigmask, set); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &set, &oset, 0); + SIG2OSIG(oset, td->td_retval[0]); return (0); } #endif /* COMPAT_43 */ @@ -1458,6 +1451,7 @@ int kern_sigsuspend(struct thread *td, sigset_t mask) { struct proc *p = td->td_proc; + int has_sig, sig; /* * When returning from sigsuspend, we want @@ -1467,13 +1461,27 @@ kern_sigsuspend(struct thread *td, sigset_t mask) * to indicate this. */ PROC_LOCK(p); - td->td_oldsigmask = td->td_sigmask; + kern_sigprocmask(td, SIG_SETMASK, &mask, &td->td_oldsigmask, + SIGPROCMASK_PROC_LOCKED); td->td_pflags |= TDP_OLDMASK; - SIG_CANTMASK(mask); - td->td_sigmask = mask; - signotify(td); - while (msleep(&p->p_sigacts, &p->p_mtx, PPAUSE|PCATCH, "pause", 0) == 0) - /* void */; + + /* + * Process signals now. Otherwise, we can get spurious wakeup + * due to signal entered process queue, but delivered to other + * thread. But sigsuspend should return only on signal + * delivery. + */ + for (has_sig = 0; !has_sig;) { + while (msleep(&p->p_sigacts, &p->p_mtx, PPAUSE|PCATCH, "pause", + 0) == 0) + /* void */; + mtx_lock(&p->p_sigacts->ps_mtx); + while ((sig = cursig(td, SIG_STOP_ALLOWED)) != 0) { + postsig(sig); + has_sig = 1; + } + mtx_unlock(&p->p_sigacts->ps_mtx); + } PROC_UNLOCK(p); /* always return EINTR rather than ERESTART... */ return (EINTR); @@ -1495,21 +1503,10 @@ osigsuspend(td, uap) struct thread *td; struct osigsuspend_args *uap; { - struct proc *p = td->td_proc; sigset_t mask; - PROC_LOCK(p); - td->td_oldsigmask = td->td_sigmask; - td->td_pflags |= TDP_OLDMASK; OSIG2SIG(uap->mask, mask); - SIG_CANTMASK(mask); - SIGSETLO(td->td_sigmask, mask); - signotify(td); - while (msleep(&p->p_sigacts, &p->p_mtx, PPAUSE|PCATCH, "opause", 0) == 0) - /* void */; - PROC_UNLOCK(p); - /* always return EINTR rather than ERESTART... */ - return (EINTR); + return (kern_sigsuspend(td, mask)); } #endif /* COMPAT_43 */ @@ -1838,6 +1835,7 @@ void trapsignal(struct thread *td, ksiginfo_t *ksi) { struct sigacts *ps; + sigset_t mask; struct proc *p; int sig; int code; @@ -1861,8 +1859,11 @@ trapsignal(struct thread *td, ksiginfo_t *ksi) (*p->p_sysent->sv_sendsig)(ps->ps_sigact[_SIG_IDX(sig)], ksi, &td->td_sigmask); SIGSETOR(td->td_sigmask, ps->ps_catchmask[_SIG_IDX(sig)]); - if (!SIGISMEMBER(ps->ps_signodefer, sig)) - SIGADDSET(td->td_sigmask, sig); + if (!SIGISMEMBER(ps->ps_signodefer, sig)) { + SIGEMPTYSET(mask); + SIGADDSET(mask, sig); + kern_sigprocmask(td, SIG_BLOCK, &mask, NULL, 0); + } if (SIGISMEMBER(ps->ps_sigreset, sig)) { /* * See kern_sigaction() for origin of this code. @@ -2676,7 +2677,7 @@ postsig(sig) struct sigacts *ps; sig_t action; ksiginfo_t ksi; - sigset_t returnmask; + sigset_t returnmask, mask; KASSERT(sig != 0, ("postsig")); @@ -2731,9 +2732,15 @@ postsig(sig) } else returnmask = td->td_sigmask; - SIGSETOR(td->td_sigmask, ps->ps_catchmask[_SIG_IDX(sig)]); - if (!SIGISMEMBER(ps->ps_signodefer, sig)) - SIGADDSET(td->td_sigmask, sig); + kern_sigprocmask(td, SIG_BLOCK, + &ps->ps_catchmask[_SIG_IDX(sig)], NULL, + SIGPROCMASK_PROC_LOCKED); + if (!SIGISMEMBER(ps->ps_signodefer, sig)) { + SIGEMPTYSET(mask); + SIGADDSET(mask, sig); + kern_sigprocmask(td, SIG_BLOCK, &mask, NULL, + SIGPROCMASK_PROC_LOCKED); + } if (SIGISMEMBER(ps->ps_sigreset, sig)) { /* diff --git a/sys/kern/subr_trap.c b/sys/kern/subr_trap.c index ccf6479..4d20ebd 100644 --- a/sys/kern/subr_trap.c +++ b/sys/kern/subr_trap.c @@ -245,6 +245,11 @@ ast(struct trapframe *framep) PROC_UNLOCK(p); } + if (td->td_pflags & TDP_OLDMASK) { + td->td_pflags &= ~TDP_OLDMASK; + kern_sigprocmask(td, SIG_SETMASK, &td->td_oldsigmask, NULL, 0); + } + userret(td, framep); mtx_assert(&Giant, MA_NOTOWNED); } diff --git a/sys/kern/sys_generic.c b/sys/kern/sys_generic.c index 6831fe8..b34af61 100644 --- a/sys/kern/sys_generic.c +++ b/sys/kern/sys_generic.c @@ -751,6 +751,58 @@ poll_no_poll(int events) return (events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); } +int +pselect(struct thread *td, struct pselect_args *uap) +{ + struct timespec ts; + struct timeval tv, *tvp; + sigset_t set, *uset; + int error; + + if (uap->ts != NULL) { + error = copyin(uap->ts, &ts, sizeof(ts)); + if (error != 0) + return (error); + TIMESPEC_TO_TIMEVAL(&tv, &ts); + tvp = &tv; + } else + tvp = NULL; + if (uap->sm != NULL) { + error = copyin(uap->sm, &set, sizeof(set)); + if (error != 0) + return (error); + uset = &set; + } else + uset = NULL; + return (kern_pselect(td, uap->nd, uap->in, uap->ou, uap->ex, tvp, + uset, NFDBITS)); +} + +int +kern_pselect(struct thread *td, int nd, fd_set *in, fd_set *ou, fd_set *ex, + struct timeval *tvp, sigset_t *uset, int abi_nfdbits) +{ + int error; + + if (uset != NULL) { + error = kern_sigprocmask(td, SIG_SETMASK, uset, + &td->td_oldsigmask, 0); + if (error != 0) + return (error); + td->td_pflags |= TDP_OLDMASK; + /* + * Make sure that ast() is called on return to + * usermode and TDP_OLDMASK is cleared, restoring old + * sigmask. + */ + thread_lock(td); + td->td_flags |= TDF_ASTPENDING; + thread_unlock(td); + } + error = kern_select(td, nd, in, ou, ex, tvp, abi_nfdbits); + return (error); +} + #ifndef _SYS_SYSPROTO_H_ struct select_args { int nd; @@ -759,9 +811,7 @@ struct select_args { }; #endif int -select(td, uap) - register struct thread *td; - register struct select_args *uap; +select(struct thread *td, struct select_args *uap) { struct timeval tv, *tvp; int error; diff --git a/sys/kern/syscalls.master b/sys/kern/syscalls.master index f96ed79..ac64a75 100644 --- a/sys/kern/syscalls.master +++ b/sys/kern/syscalls.master @@ -919,5 +919,9 @@ 519 AUE_PDKILL UNIMPL pdkill 520 AUE_PDGETPID UNIMPL pdgetpid 521 AUE_PDWAIT UNIMPL pdwait +522 AUE_SELECT STD { int pselect(int nd, fd_set *in, \ + fd_set *ou, fd_set *ex, \ + const struct timespec *ts, \ + const sigset_t *sm); } ; Please copy any additions and changes to the following compatability tables: ; sys/compat/freebsd32/syscalls.master diff --git a/sys/mips/mips/pm_machdep.c b/sys/mips/mips/pm_machdep.c index 9fb1fec..dc30f4c 100644 --- a/sys/mips/mips/pm_machdep.c +++ b/sys/mips/mips/pm_machdep.c @@ -213,13 +213,11 @@ int sigreturn(struct thread *td, struct sigreturn_args *uap) { struct trapframe *regs; - const ucontext_t *ucp; - struct proc *p; + ucontext_t *ucp; ucontext_t uc; int error; ucp = &uc; - p = td->td_proc; error = copyin(uap->sigcntxp, &uc, sizeof(uc)); if (error != 0) @@ -229,7 +227,7 @@ sigreturn(struct thread *td, struct sigreturn_args *uap) /* #ifdef DEBUG */ if (ucp->uc_mcontext.mc_regs[ZERO] != UCONTEXT_MAGIC) { - printf("sigreturn: pid %d, ucp %p\n", p->p_pid, ucp); + printf("sigreturn: pid %d, ucp %p\n", td->td_proc->p_pid, ucp); printf(" old sp %x ra %x pc %x\n", regs->sp, regs->ra, regs->pc); printf(" new sp %x ra %x pc %x z %x\n", @@ -253,11 +251,8 @@ sigreturn(struct thread *td, struct sigreturn_args *uap) regs->mullo = ucp->uc_mcontext.mullo; regs->mulhi = ucp->uc_mcontext.mulhi; - PROC_LOCK(p); - td->td_sigmask = ucp->uc_sigmask; - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &ucp->uc_sigmask, NULL, 0); + return(EJUSTRETURN); } diff --git a/sys/pc98/pc98/machdep.c b/sys/pc98/pc98/machdep.c index f052cee..f07eb6b 100644 --- a/sys/pc98/pc98/machdep.c +++ b/sys/pc98/pc98/machdep.c @@ -686,7 +686,6 @@ osigreturn(td, uap) struct osigcontext sc; struct trapframe *regs; struct osigcontext *scp; - struct proc *p = td->td_proc; int eflags, error; ksiginfo_t ksi; @@ -786,17 +785,14 @@ osigreturn(td, uap) regs->tf_eip = scp->sc_pc; regs->tf_eflags = eflags; - PROC_LOCK(p); #if defined(COMPAT_43) if (scp->sc_onstack & 1) td->td_sigstk.ss_flags |= SS_ONSTACK; else td->td_sigstk.ss_flags &= ~SS_ONSTACK; #endif - SIGSETOLD(td->td_sigmask, scp->sc_mask); - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, (sigset_t *)&scp->sc_mask, NULL, + SIGPROCMASK_OLD); return (EJUSTRETURN); } #endif /* COMPAT_43 */ @@ -813,9 +809,8 @@ freebsd4_sigreturn(td, uap) } */ *uap; { struct ucontext4 uc; - struct proc *p = td->td_proc; struct trapframe *regs; - const struct ucontext4 *ucp; + struct ucontext4 *ucp; int cs, eflags, error; ksiginfo_t ksi; @@ -903,18 +898,13 @@ freebsd4_sigreturn(td, uap) bcopy(&ucp->uc_mcontext.mc_fs, regs, sizeof(*regs)); } - PROC_LOCK(p); #if defined(COMPAT_43) if (ucp->uc_mcontext.mc_onstack & 1) td->td_sigstk.ss_flags |= SS_ONSTACK; else td->td_sigstk.ss_flags &= ~SS_ONSTACK; #endif - - td->td_sigmask = ucp->uc_sigmask; - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &ucp->uc_sigmask, NULL, 0); return (EJUSTRETURN); } #endif /* COMPAT_FREEBSD4 */ @@ -930,9 +920,8 @@ sigreturn(td, uap) } */ *uap; { ucontext_t uc; - struct proc *p = td->td_proc; struct trapframe *regs; - const ucontext_t *ucp; + ucontext_t *ucp; int cs, eflags, error, ret; ksiginfo_t ksi; @@ -1024,18 +1013,14 @@ sigreturn(td, uap) bcopy(&ucp->uc_mcontext.mc_fs, regs, sizeof(*regs)); } - PROC_LOCK(p); #if defined(COMPAT_43) if (ucp->uc_mcontext.mc_onstack & 1) td->td_sigstk.ss_flags |= SS_ONSTACK; else td->td_sigstk.ss_flags &= ~SS_ONSTACK; #endif + kern_sigprocmask(td, SIG_SETMASK, &ucp->uc_sigmask, NULL, 0); - td->td_sigmask = ucp->uc_sigmask; - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); return (EJUSTRETURN); } diff --git a/sys/powerpc/aim/machdep.c b/sys/powerpc/aim/machdep.c index 339e64a..654cb67 100644 --- a/sys/powerpc/aim/machdep.c +++ b/sys/powerpc/aim/machdep.c @@ -692,7 +692,6 @@ sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) int sigreturn(struct thread *td, struct sigreturn_args *uap) { - struct proc *p; ucontext_t uc; int error; @@ -707,12 +706,7 @@ sigreturn(struct thread *td, struct sigreturn_args *uap) if (error != 0) return (error); - p = td->td_proc; - PROC_LOCK(p); - td->td_sigmask = uc.uc_sigmask; - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]); diff --git a/sys/powerpc/booke/machdep.c b/sys/powerpc/booke/machdep.c index 8787098..1eace0e 100644 --- a/sys/powerpc/booke/machdep.c +++ b/sys/powerpc/booke/machdep.c @@ -665,7 +665,6 @@ set_mcontext(struct thread *td, const mcontext_t *mcp) int sigreturn(struct thread *td, struct sigreturn_args *uap) { - struct proc *p; ucontext_t uc; int error; @@ -680,12 +679,7 @@ sigreturn(struct thread *td, struct sigreturn_args *uap) if (error != 0) return (error); - p = td->td_proc; - PROC_LOCK(p); - td->td_sigmask = uc.uc_sigmask; - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x", td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]); diff --git a/sys/sparc64/sparc64/machdep.c b/sys/sparc64/sparc64/machdep.c index 49a2bb1..4b55c0e 100644 --- a/sys/sparc64/sparc64/machdep.c +++ b/sys/sparc64/sparc64/machdep.c @@ -653,11 +653,7 @@ sigreturn(struct thread *td, struct sigreturn_args *uap) if (error != 0) return (error); - PROC_LOCK(p); - td->td_sigmask = uc.uc_sigmask; - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); CTR4(KTR_SIG, "sigreturn: return td=%p pc=%#lx sp=%#lx tstate=%#lx", td, mc->mc_tpc, mc->mc_sp, mc->mc_tstate); diff --git a/sys/sun4v/sun4v/machdep.c b/sys/sun4v/sun4v/machdep.c index 5430460..3913d35 100644 --- a/sys/sun4v/sun4v/machdep.c +++ b/sys/sun4v/sun4v/machdep.c @@ -667,11 +667,7 @@ sigreturn(struct thread *td, struct sigreturn_args *uap) if (error != 0) return (error); - PROC_LOCK(p); - td->td_sigmask = uc.uc_sigmask; - SIG_CANTMASK(td->td_sigmask); - signotify(td); - PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); CTR4(KTR_SIG, "sigreturn: return td=%p pc=%#lx sp=%#lx tstate=%#lx", td, mc->mc_tpc, mc->mc_sp, mc->mc_tstate); diff --git a/sys/sys/signalvar.h b/sys/sys/signalvar.h index b39f2bf..b9a54f0 100644 --- a/sys/sys/signalvar.h +++ b/sys/sys/signalvar.h @@ -316,6 +316,10 @@ extern int kern_logsigexit; /* Sysctl variable kern.logsigexit */ #define SIG_STOP_ALLOWED 100 #define SIG_STOP_NOT_ALLOWED 101 +/* flags for kern_sigprocmask */ +#define SIGPROCMASK_OLD 0x0001 +#define SIGPROCMASK_PROC_LOCKED 0x0002 + /* * Machine-independent functions: */ @@ -359,7 +363,8 @@ void sigqueue_delete_stopmask_proc(struct proc *); void sigqueue_take(ksiginfo_t *ksi); int kern_sigtimedwait(struct thread *, sigset_t, ksiginfo_t *, struct timespec *); - +int kern_sigprocmask(struct thread *td, int how, + sigset_t *set, sigset_t *oset, int flags); /* * Machine-dependent functions: */ diff --git a/sys/sys/syscallsubr.h b/sys/sys/syscallsubr.h index e1c83cc..2813a58 100644 --- a/sys/sys/syscallsubr.h +++ b/sys/sys/syscallsubr.h @@ -148,6 +148,8 @@ int kern_pathconf(struct thread *td, char *path, enum uio_seg pathseg, int name, u_long flags); int kern_pipe(struct thread *td, int fildes[2]); int kern_preadv(struct thread *td, int fd, struct uio *auio, off_t offset); +int kern_pselect(struct thread *td, int nd, fd_set *in, fd_set *ou, + fd_set *ex, struct timeval *tvp, sigset_t *uset, int abi_nfdbits); int kern_ptrace(struct thread *td, int req, pid_t pid, void *addr, int data); int kern_pwritev(struct thread *td, int fd, struct uio *auio, off_t offset); @@ -190,8 +192,6 @@ int kern_shmctl(struct thread *td, int shmid, int cmd, void *buf, int kern_sigaction(struct thread *td, int sig, struct sigaction *act, struct sigaction *oact, int flags); int kern_sigaltstack(struct thread *td, stack_t *ss, stack_t *oss); -int kern_sigprocmask(struct thread *td, int how, - sigset_t *set, sigset_t *oset, int old); int kern_sigsuspend(struct thread *td, sigset_t mask); int kern_stat(struct thread *td, char *path, enum uio_seg pathseg, struct stat *sbp);