procfs_mem.c revision 96886 
162583Sitojun/*
262583Sitojun * Copyright (c) 1993 Jan-Simon Pendry
355505Sshin * Copyright (c) 1993 Sean Eric Fagan
455505Sshin * Copyright (c) 1993
555505Sshin *	The Regents of the University of California.  All rights reserved.
655505Sshin *
755505Sshin * This code is derived from software contributed to Berkeley by
855505Sshin * Jan-Simon Pendry and Sean Eric Fagan.
955505Sshin *
1055505Sshin * Redistribution and use in source and binary forms, with or without
1155505Sshin * modification, are permitted provided that the following conditions
1255505Sshin * are met:
1355505Sshin * 1. Redistributions of source code must retain the above copyright
1455505Sshin *    notice, this list of conditions and the following disclaimer.
1555505Sshin * 2. Redistributions in binary form must reproduce the above copyright
1655505Sshin *    notice, this list of conditions and the following disclaimer in the
1755505Sshin *    documentation and/or other materials provided with the distribution.
1855505Sshin * 3. All advertising materials mentioning features or use of this software
1955505Sshin *    must display the following acknowledgement:
2055505Sshin *	This product includes software developed by the University of
2155505Sshin *	California, Berkeley and its contributors.
2255505Sshin * 4. Neither the name of the University nor the names of its contributors
2355505Sshin *    may be used to endorse or promote products derived from this software
2455505Sshin *    without specific prior written permission.
2555505Sshin *
2655505Sshin * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2755505Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2855505Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2955505Sshin * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
3055505Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
3155505Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
3284208Sdillon * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3384208Sdillon * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
3484208Sdillon * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
3555505Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3655505Sshin * SUCH DAMAGE.
3755505Sshin *
38171135Sgnn *	@(#)procfs_mem.c	8.5 (Berkeley) 6/15/94
3962583Sitojun *
4055505Sshin * $FreeBSD: head/sys/fs/procfs/procfs_mem.c 96886 2002-05-19 00:14:50Z jhb $
4155505Sshin */
4255505Sshin
4355505Sshin#include <sys/param.h>
4455505Sshin#include <sys/lock.h>
4555505Sshin#include <sys/mutex.h>
4655505Sshin#include <sys/proc.h>
4755505Sshin#include <sys/ptrace.h>
4855505Sshin#include <sys/systm.h>
4955505Sshin#include <sys/uio.h>
50
51#include <fs/pseudofs/pseudofs.h>
52#include <fs/procfs/procfs.h>
53
54/*
55 * Copy data in and out of the target process.
56 * We do this by mapping the process's page into
57 * the kernel and then doing a uiomove direct
58 * from the kernel address space.
59 */
60int
61procfs_doprocmem(PFS_FILL_ARGS)
62{
63	int error;
64
65	if (uio->uio_resid == 0)
66		return (0);
67
68	PROC_LOCK(p);
69	error = p_candebug(td, p);
70	PROC_UNLOCK(p);
71	if (error == 0)
72		error = proc_rwmem(p, uio);
73
74	return (error);
75}
76