kernel tree reorganization stage 1: Major cvs repository work (not logged as
[dragonfly.git] / sys / i386 / i386 / procfs_machdep.c
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1/*
2 * Copyright (c) 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1993 Jan-Simon Pendry
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Jan-Simon Pendry.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * @(#)procfs_machdep.c 8.3 (Berkeley) 1/27/94
38 *
39 * From:
40 * $FreeBSD: src/sys/i386/i386/procfs_machdep.c,v 1.14 1999/10/11 14:50:03 peter Exp $
1f2de5d4 41 * $DragonFly: src/sys/i386/i386/Attic/procfs_machdep.c,v 1.3 2003/08/07 21:17:22 dillon Exp $
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42 */
43
44/*
45 * Functions to be implemented here are:
46 *
47 * procfs_read_regs(proc, regs)
48 * Get the current user-visible register set from the process
49 * and copy it into the regs structure (<machine/reg.h>).
50 * The process is stopped at the time read_regs is called.
51 *
52 * procfs_write_regs(proc, regs)
53 * Update the current register set from the passed in regs
54 * structure. Take care to avoid clobbering special CPU
55 * registers or privileged bits in the PSL.
56 * Depending on the architecture this may have fix-up work to do,
57 * especially if the IAR or PCW are modified.
58 * The process is stopped at the time write_regs is called.
59 *
60 * procfs_read_fpregs, procfs_write_fpregs
61 * deal with the floating point register set, otherwise as above.
62 *
63 * procfs_read_dbregs, procfs_write_dbregs
64 * deal with the processor debug register set, otherwise as above.
65 *
66 * procfs_sstep(proc)
67 * Arrange for the process to trap after executing a single instruction.
68 *
69 */
70
71#include <sys/param.h>
72#include <sys/proc.h>
73#include <sys/ptrace.h>
74#include <sys/vnode.h>
75#include <machine/reg.h>
76#include <machine/md_var.h>
1f2de5d4 77#include <vfs/procfs/procfs.h>
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78
79#include <vm/vm.h>
80#include <sys/lock.h>
81#include <vm/pmap.h>
82#include <vm/vm_map.h>
83
84int
85procfs_read_regs(p, regs)
86 struct proc *p;
87 struct reg *regs;
88{
89 if ((p->p_flag & P_INMEM) == 0)
90 return (EIO);
91 return (fill_regs(p, regs));
92}
93
94int
95procfs_write_regs(p, regs)
96 struct proc *p;
97 struct reg *regs;
98{
99 if ((p->p_flag & P_INMEM) == 0)
100 return (EIO);
101 return (set_regs(p, regs));
102}
103
104int
105procfs_read_dbregs(p, dbregs)
106 struct proc *p;
107 struct dbreg *dbregs;
108{
109 if ((p->p_flag & P_INMEM) == 0)
110 return (EIO);
111 return (fill_dbregs(p, dbregs));
112}
113
114int
115procfs_write_dbregs(p, dbregs)
116 struct proc *p;
117 struct dbreg *dbregs;
118{
119 if ((p->p_flag & P_INMEM) == 0)
120 return (EIO);
121 return (set_dbregs(p, dbregs));
122}
123
124/*
125 * Ptrace doesn't support fpregs at all, and there are no security holes
126 * or translations for fpregs, so we can just copy them.
127 */
128
129int
130procfs_read_fpregs(p, fpregs)
131 struct proc *p;
132 struct fpreg *fpregs;
133{
134 if ((p->p_flag & P_INMEM) == 0)
135 return (EIO);
136 return (fill_fpregs(p, fpregs));
137}
138
139int
140procfs_write_fpregs(p, fpregs)
141 struct proc *p;
142 struct fpreg *fpregs;
143{
144 if ((p->p_flag & P_INMEM) == 0)
145 return (EIO);
146 return (set_fpregs(p, fpregs));
147}
148
149int
150procfs_sstep(p)
151 struct proc *p;
152{
153 if ((p->p_flag & P_INMEM) == 0)
154 return (EIO);
155 return (ptrace_single_step(p));
156}