/* $NetBSD: kern_stub.c,v 1.9 2008/05/01 00:20:12 ad Exp $ */ /*- * Copyright (c) 2007, 2008 The NetBSD Foundation, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * 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. */ /* * Copyright (c) 1982, 1986, 1991, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS 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. * * @(#)subr_xxx.c 8.3 (Berkeley) 3/29/95 */ /* * Stubs for system calls and facilities not included in the system. */ #include __KERNEL_RCSID(0, "$NetBSD: kern_stub.c,v 1.9 2008/05/01 00:20:12 ad Exp $"); #include "opt_ptrace.h" #include "opt_ktrace.h" #include #include #include #include #include #include #include #include /* * Nonexistent system call-- signal process (may want to handle it). Flag * error in case process won't see signal immediately (blocked or ignored). */ #ifndef PTRACE __weak_alias(sys_ptrace,sys_nosys); #endif /* PTRACE */ /* * ktrace stubs. ktruser() goes to enosys as we want to fail the syscall, * but not kill the process: utrace() is a debugging feature. */ #ifndef KTRACE __weak_alias(ktr_csw,nullop); /* Probes */ __weak_alias(ktr_emul,nullop); __weak_alias(ktr_geniov,nullop); __weak_alias(ktr_genio,nullop); __weak_alias(ktr_mibio,nullop); __weak_alias(ktr_namei,nullop); __weak_alias(ktr_namei2,nullop); __weak_alias(ktr_psig,nullop); __weak_alias(ktr_syscall,nullop); __weak_alias(ktr_sysret,nullop); __weak_alias(ktr_kuser,nullop); __weak_alias(ktr_mmsg,nullop); __weak_alias(ktr_mib,nullop); __weak_alias(ktr_mool,nullop); __weak_alias(ktr_execarg,nullop); __weak_alias(ktr_execenv,nullop); __weak_alias(sys_fktrace,sys_nosys); /* Syscalls */ __weak_alias(sys_ktrace,sys_nosys); __weak_alias(sys_utrace,sys_nosys); int ktrace_on; /* Misc */ __weak_alias(ktruser,enosys); __weak_alias(ktr_point,nullop); #endif /* KTRACE */ /* * Scheduler activations system calls. These need to remain until libc's * major version is bumped. */ __strong_alias(sys_sa_register,sys_nosys); __strong_alias(sys_sa_stacks,sys_nosys); __strong_alias(sys_sa_enable,sys_nosys); __strong_alias(sys_sa_setconcurrency,sys_nosys); __strong_alias(sys_sa_yield,sys_nosys); __strong_alias(sys_sa_preempt,sys_nosys); __strong_alias(sys_sa_unblockyield,sys_nosys); /* * Stubs for architectures that do not support kernel preemption. */ #ifndef __HAVE_PREEMPTION bool cpu_kpreempt_enter(uintptr_t where, int s) { return false; } void cpu_kpreempt_exit(uintptr_t where) { } bool cpu_kpreempt_disabled(void) { return true; } #else # ifndef MULTIPROCESSOR # error __HAVE_PREEMPTION requires MULTIPROCESSOR # endif #endif /* !__HAVE_PREEMPTION */ /* ARGSUSED */ int sys_nosys(struct lwp *l, const void *v, register_t *retval) { mutex_enter(proc_lock); psignal(l->l_proc, SIGSYS); mutex_exit(proc_lock); return ENOSYS; } /* * Unsupported device function (e.g. writing to read-only device). */ int enodev(void) { return (ENODEV); } /* * Unconfigured device function; driver not configured. */ int enxio(void) { return (ENXIO); } /* * Unsupported ioctl function. */ int enoioctl(void) { return (ENOTTY); } /* * Unsupported system function. * This is used for an otherwise-reasonable operation * that is not supported by the current system binary. */ int enosys(void) { return (ENOSYS); } /* * Return error for operation not supported * on a specific object or file type. */ int eopnotsupp(void) { return (EOPNOTSUPP); } /* * Generic null operation, always returns success. */ /*ARGSUSED*/ int nullop(void *v) { return (0); }