Print unimplemented syscall number to the ctty on SIGSYS, if enabled
by the knob kern.lognosys. Discussed with: imp Reviewed by: jhb Sponsored by: The FreeBSD Foundation MFC after: 3 weeks X-Differential revision: https://reviews.freebsd.org/D11080
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2d88da2f06
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=319874
@ -150,6 +150,10 @@ static int signal_alloc_fail = 0;
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SYSCTL_INT(_kern_sigqueue, OID_AUTO, alloc_fail, CTLFLAG_RD,
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&signal_alloc_fail, 0, "signals failed to be allocated");
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static int kern_lognosys = 0;
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SYSCTL_INT(_kern, OID_AUTO, lognosys, CTLFLAG_RWTUN, &kern_lognosys, 0,
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"Log invalid syscalls");
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SYSINIT(signal, SI_SUB_P1003_1B, SI_ORDER_FIRST+3, sigqueue_start, NULL);
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/*
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@ -3568,11 +3572,16 @@ struct nosys_args {
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int
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nosys(struct thread *td, struct nosys_args *args)
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{
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struct proc *p = td->td_proc;
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struct proc *p;
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p = td->td_proc;
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PROC_LOCK(p);
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tdsignal(td, SIGSYS);
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PROC_UNLOCK(p);
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if (kern_lognosys)
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uprintf("pid %d comm %s: nosys %d\n", p->p_pid, p->p_comm,
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td->td_sa.code);
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return (ENOSYS);
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}
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