Date: Fri, 21 Jul 2017 18:10:46 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r321344 - stable/11/sys/kern Message-ID: <201707211810.v6LIAkwx051543@repo.freebsd.org>
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Author: kib Date: Fri Jul 21 18:10:46 2017 New Revision: 321344 URL: https://svnweb.freebsd.org/changeset/base/321344 Log: MFC r319874: Print unimplemented syscall number to the ctty on SIGSYS, if enabled by the knob kern.lognosys. Modified: stable/11/sys/kern/kern_sig.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/kern/kern_sig.c ============================================================================== --- stable/11/sys/kern/kern_sig.c Fri Jul 21 18:06:57 2017 (r321343) +++ stable/11/sys/kern/kern_sig.c Fri Jul 21 18:10:46 2017 (r321344) @@ -150,6 +150,10 @@ static int signal_alloc_fail = 0; SYSCTL_INT(_kern_sigqueue, OID_AUTO, alloc_fail, CTLFLAG_RD, &signal_alloc_fail, 0, "signals failed to be allocated"); +static int kern_lognosys = 0; +SYSCTL_INT(_kern, OID_AUTO, lognosys, CTLFLAG_RWTUN, &kern_lognosys, 0, + "Log invalid syscalls"); + SYSINIT(signal, SI_SUB_P1003_1B, SI_ORDER_FIRST+3, sigqueue_start, NULL); /* @@ -3584,11 +3588,16 @@ nosys(td, args) struct thread *td; struct nosys_args *args; { - struct proc *p = td->td_proc; + struct proc *p; + p = td->td_proc; + PROC_LOCK(p); tdsignal(td, SIGSYS); PROC_UNLOCK(p); + if (kern_lognosys) + uprintf("pid %d comm %s: nosys %d\n", p->p_pid, p->p_comm, + td->td_sa.code); return (ENOSYS); }
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