1 /*-
2 * Copyright (c) 1999 Brian Scott Dean, brdean@unx.sas.com.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Jan-Simon Pendry under the following copyrights and conditions:
7 *
8 * Copyright (c) 1993 Jan-Simon Pendry
9 * Copyright (c) 1993
10 * The Regents of the University of California. All rights reserved.
11 *
12 * This code is derived from software contributed to Berkeley by
13 * Jan-Simon Pendry.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 * From: @(#)procfs_regs.c 8.4 (Berkeley) 6/15/94
40 *
41 * From:
42 * $Id: procfs_regs.c,v 3.2 1993/12/15 09:40:17 jsp Exp $
43 * $FreeBSD$
44 */
45
46 #include "opt_compat.h"
47
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/lock.h>
51 #include <sys/mutex.h>
52 #include <sys/proc.h>
53 #include <sys/ptrace.h>
54 #include <sys/sysent.h>
55 #include <sys/uio.h>
56
57 #include <machine/reg.h>
58
59 #include <fs/pseudofs/pseudofs.h>
60 #include <fs/procfs/procfs.h>
61
62 #ifdef COMPAT_FREEBSD32
63 #include <sys/procfs.h>
64 #include <machine/fpu.h>
65
66 /*
67 * PROC(write, dbregs, td2, &r) becomes
68 * proc_write_dbregs(td2, &r) or
69 * proc_write_dbregs32(td2, &r32)
70 *
71 * UIOMOVE_FROMBUF(r, uio) becomes
72 * uiomove_frombuf(&r, sizeof(r), uio) or
73 * uiomove_frombuf(&r32, sizeof(r32), uio)
74 */
75 #define PROC(d, w, t, r) wrap32 ? \
76 proc_ ## d ## _ ## w ## 32(t, r ## 32) : \
77 proc_ ## d ## _ ## w(t, r)
78 #define UIOMOVE_FROMBUF(k, u) wrap32 ? \
79 uiomove_frombuf(& k ## 32, sizeof(k ## 32), u) : \
80 uiomove_frombuf(& k, sizeof(k), u)
81 #else
82 #define PROC(d, w, t, r) proc_ ## d ## _ ## w(t, r)
83 #define UIOMOVE_FROMBUF(k, u) uiomove_frombuf(& k, sizeof(k), u)
84 #endif
85
86 int
87 procfs_doprocdbregs(PFS_FILL_ARGS)
88 {
89 int error;
90 struct dbreg r;
91 struct thread *td2;
92 #ifdef COMPAT_FREEBSD32
93 struct dbreg32 r32;
94 int wrap32 = 0;
95 #endif
96
97 if (uio->uio_offset != 0)
98 return (0);
99
100 PROC_LOCK(p);
101 KASSERT(p->p_lock > 0, ("proc not held"));
102 if (p_candebug(td, p) != 0) {
103 PROC_UNLOCK(p);
104 return (EPERM);
105 }
106
107 td2 = FIRST_THREAD_IN_PROC(p);
108 #ifdef COMPAT_FREEBSD32
109 if (SV_CURPROC_FLAG(SV_ILP32)) {
110 if (SV_PROC_FLAG(td2->td_proc, SV_ILP32) == 0) {
111 PROC_UNLOCK(p);
112 return (EINVAL);
113 }
114 wrap32 = 1;
115 }
116 #endif
117 error = PROC(read, dbregs, td2, &r);
118 if (error == 0) {
119 PROC_UNLOCK(p);
120 error = UIOMOVE_FROMBUF(r, uio);
121 PROC_LOCK(p);
122 }
123 if (error == 0 && uio->uio_rw == UIO_WRITE) {
124 if (!P_SHOULDSTOP(p)) /* XXXKSE should be P_TRACED? */
125 error = EBUSY;
126 else
127 /* XXXKSE: */
128 error = PROC(write, dbregs, td2, &r);
129 }
130 PROC_UNLOCK(p);
131
132 return (error);
133 }
Cache object: a82b1dce33baae874585f2e39ec3431c
|