272 lines
7.2 KiB
C
272 lines
7.2 KiB
C
/* $NetBSD: kern_stub.c,v 1.28 2010/04/28 20:33:52 dyoung Exp $ */
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/*-
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* Copyright (c) 2007, 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)subr_xxx.c 8.3 (Berkeley) 3/29/95
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*/
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/*
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* Stubs for system calls and facilities not included in the system.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: kern_stub.c,v 1.28 2010/04/28 20:33:52 dyoung Exp $");
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#include "opt_ptrace.h"
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#include "opt_ktrace.h"
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#include "opt_sa.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/fstypes.h>
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#include <sys/signalvar.h>
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#include <sys/syscall.h>
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#include <sys/ktrace.h>
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#include <sys/intr.h>
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#include <sys/cpu.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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bool default_bus_space_is_equal(bus_space_tag_t, bus_space_tag_t);
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/*
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* Nonexistent system call-- signal process (may want to handle it). Flag
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* error in case process won't see signal immediately (blocked or ignored).
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*/
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#ifndef PTRACE
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__weak_alias(sys_ptrace,sys_nosys);
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#endif /* PTRACE */
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/*
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* ktrace stubs. ktruser() goes to enosys as we want to fail the syscall,
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* but not kill the process: utrace() is a debugging feature.
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*/
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#ifndef KTRACE
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__weak_alias(ktr_csw,nullop); /* Probes */
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__weak_alias(ktr_emul,nullop);
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__weak_alias(ktr_geniov,nullop);
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__weak_alias(ktr_genio,nullop);
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__weak_alias(ktr_mibio,nullop);
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__weak_alias(ktr_namei,nullop);
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__weak_alias(ktr_namei2,nullop);
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__weak_alias(ktr_psig,nullop);
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__weak_alias(ktr_saupcall,nullop);
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__weak_alias(ktr_syscall,nullop);
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__weak_alias(ktr_sysret,nullop);
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__weak_alias(ktr_kuser,nullop);
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__weak_alias(ktr_mmsg,nullop);
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__weak_alias(ktr_mib,nullop);
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__weak_alias(ktr_mool,nullop);
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__weak_alias(ktr_execarg,nullop);
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__weak_alias(ktr_execenv,nullop);
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__weak_alias(sys_fktrace,sys_nosys); /* Syscalls */
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__weak_alias(sys_ktrace,sys_nosys);
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__weak_alias(sys_utrace,sys_nosys);
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int ktrace_on; /* Misc */
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__weak_alias(ktruser,enosys);
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__weak_alias(ktr_point,nullop);
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#endif /* KTRACE */
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__weak_alias(spldebug_start, voidop);
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__weak_alias(spldebug_stop, voidop);
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__weak_alias(machdep_init,nullop);
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__weak_alias(pci_chipset_tag_create, eopnotsupp);
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__weak_alias(pci_chipset_tag_destroy, voidop);
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__weak_alias(bus_space_tag_create, eopnotsupp);
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__weak_alias(bus_space_tag_destroy, voidop);
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__weak_alias(bus_space_is_equal, default_bus_space_is_equal);
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__weak_alias(kobj_renamespace, nullop);
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#if !defined(KERN_SA)
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/*
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* Scheduler activations system calls. These need to remain, even when
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* KERN_SA isn't defined, until libc's major version is bumped.
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*/
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__strong_alias(sys_sa_register,sys_nosys);
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__strong_alias(sys_sa_stacks,sys_nosys);
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__strong_alias(sys_sa_enable,sys_nosys);
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__strong_alias(sys_sa_setconcurrency,sys_nosys);
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__strong_alias(sys_sa_yield,sys_nosys);
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__strong_alias(sys_sa_preempt,sys_nosys);
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__strong_alias(sys_sa_unblockyield,sys_nosys);
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/*
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* Stubs for compat_netbsd32.
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*/
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__strong_alias(dosa_register,sys_nosys);
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__strong_alias(sa_stacks1,sys_nosys);
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#endif
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/*
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* Stubs for architectures that do not support kernel preemption.
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*/
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#ifndef __HAVE_PREEMPTION
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bool
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cpu_kpreempt_enter(uintptr_t where, int s)
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{
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return false;
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}
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void
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cpu_kpreempt_exit(uintptr_t where)
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{
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}
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bool
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cpu_kpreempt_disabled(void)
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{
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return true;
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}
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#else
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# ifndef MULTIPROCESSOR
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# error __HAVE_PREEMPTION requires MULTIPROCESSOR
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# endif
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#endif /* !__HAVE_PREEMPTION */
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int
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sys_nosys(struct lwp *l, const void *v, register_t *retval)
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{
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mutex_enter(proc_lock);
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psignal(l->l_proc, SIGSYS);
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mutex_exit(proc_lock);
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return ENOSYS;
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}
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/*
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* Unsupported device function (e.g. writing to read-only device).
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*/
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int
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enodev(void)
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{
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return (ENODEV);
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}
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/*
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* Unconfigured device function; driver not configured.
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*/
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int
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enxio(void)
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{
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return (ENXIO);
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}
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/*
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* Unsupported ioctl function.
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*/
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int
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enoioctl(void)
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{
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return (ENOTTY);
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}
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/*
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* Unsupported system function.
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* This is used for an otherwise-reasonable operation
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* that is not supported by the current system binary.
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*/
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int
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enosys(void)
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{
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return (ENOSYS);
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}
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/*
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* Return error for operation not supported
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* on a specific object or file type.
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*/
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int
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eopnotsupp(void)
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{
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return (EOPNOTSUPP);
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}
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/*
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* Generic null operation, void return value.
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*/
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void
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voidop(void)
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{
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}
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/*
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* Generic null operation, always returns success.
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*/
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/*ARGSUSED*/
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int
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nullop(void *v)
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{
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return (0);
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}
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bool
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default_bus_space_is_equal(bus_space_tag_t t1, bus_space_tag_t t2)
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{
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return memcmp(&t1, &t2, sizeof(t1)) == 0;
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}
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