202 lines
7.4 KiB
C
202 lines
7.4 KiB
C
/* $NetBSD: sys_process.c,v 1.179 2017/04/13 07:58:45 skrll Exp $ */
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/*-
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* Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Doran.
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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, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry.
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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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* from: @(#)sys_process.c 8.1 (Berkeley) 6/10/93
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*/
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/*-
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* Copyright (c) 1993 Jan-Simon Pendry.
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* Copyright (c) 1994 Christopher G. Demetriou. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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* from: @(#)sys_process.c 8.1 (Berkeley) 6/10/93
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*/
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/*
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* References:
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* (1) Bach's "The Design of the UNIX Operating System",
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* (2) sys/miscfs/procfs from UCB's 4.4BSD-Lite distribution,
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* (3) the "4.4BSD Programmer's Reference Manual" published
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* by USENIX and O'Reilly & Associates.
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* The 4.4BSD PRM does a reasonably good job of documenting what the various
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* ptrace() requests should actually do, and its text is quoted several times
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* in this file.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: sys_process.c,v 1.179 2017/04/13 07:58:45 skrll Exp $");
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#ifdef _KERNEL_OPT
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#include "opt_ptrace.h"
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#include "opt_ktrace.h"
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#include "opt_pax.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/errno.h>
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#include <sys/exec.h>
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#include <sys/pax.h>
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#include <sys/ptrace.h>
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#include <sys/uio.h>
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#include <sys/ras.h>
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#include <sys/kmem.h>
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#include <sys/kauth.h>
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#include <sys/mount.h>
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#include <sys/syscallargs.h>
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#include <uvm/uvm_extern.h>
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#include <machine/reg.h>
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#if defined(KTRACE) || defined(PTRACE_HOOKS)
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int
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process_domem(struct lwp *curl /*tracer*/,
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struct lwp *l /*traced*/,
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struct uio *uio)
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{
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struct proc *p = l->l_proc; /* traced */
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struct vmspace *vm;
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int error;
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size_t len;
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error = 0;
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len = uio->uio_resid;
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if (len == 0)
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return 0;
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#ifdef PMAP_NEED_PROCWR
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vaddr_t addr = uio->uio_offset;
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#endif
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vm = p->p_vmspace;
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mutex_enter(&vm->vm_map.misc_lock);
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if ((l->l_flag & LW_WEXIT) || vm->vm_refcnt < 1)
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error = EFAULT;
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if (error == 0)
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p->p_vmspace->vm_refcnt++; /* XXX */
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mutex_exit(&vm->vm_map.misc_lock);
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if (error != 0)
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return error;
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error = uvm_io(&vm->vm_map, uio, pax_mprotect_prot(l));
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#ifdef PMAP_NEED_PROCWR
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if (error == 0 && uio->uio_rw == UIO_WRITE)
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pmap_procwr(p, addr, len);
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#endif
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uvmspace_free(vm);
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return error;
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}
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#endif /* KTRACE || PTRACE_HOOKS */
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/*
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* Dummy routine so that ptrace_common module will fail to load if this
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* routine is not defined.
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*/
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#if defined(PTRACE_HOOKS)
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void
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ptrace_hooks(void)
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{
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}
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#endif
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