1 /*-
2 * Copyright (c) 1993 Jan-Simon Pendry
3 * Copyright (c) 1993
4 * The Regents of the University of California. All rights reserved.
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 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)procfs_fpregs.c 8.2 (Berkeley) 6/15/94
34 *
35 * From:
36 * $Id: procfs_regs.c,v 3.2 1993/12/15 09:40:17 jsp Exp $
37 * $FreeBSD$
38 */
39
40 #include "opt_compat.h"
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/lock.h>
45 #include <sys/mutex.h>
46 #include <sys/proc.h>
47 #include <sys/ptrace.h>
48 #include <sys/uio.h>
49
50 #include <machine/reg.h>
51
52 #include <fs/pseudofs/pseudofs.h>
53 #include <fs/procfs/procfs.h>
54
55 #ifdef COMPAT_IA32
56 #include <sys/procfs.h>
57 #include <machine/fpu.h>
58 #include <compat/ia32/ia32_reg.h>
59
60 extern struct sysentvec ia32_freebsd_sysvec;
61 /*
62 * PROC(write, fpregs, td2, &r) becomes
63 * proc_write_fpregs(td2, &r) or
64 * proc_write_fpregs32(td2, &r32)
65 *
66 * UIOMOVE_FROMBUF(r, uio) becomes
67 * uiomove_frombuf(&r, sizeof(r), uio) or
68 * uiomove_frombuf(&r32, sizeof(r32), uio)
69 */
70 #define PROC(d, w, t, r) wrap32 ? \
71 proc_ ## d ## _ ## w ## 32(t, r ## 32) : \
72 proc_ ## d ## _ ## w(t, r)
73 #define UIOMOVE_FROMBUF(k, u) wrap32 ? \
74 uiomove_frombuf(& k ## 32, sizeof(k ## 32), u) : \
75 uiomove_frombuf(& k, sizeof(k), u)
76 #else
77 #define PROC(d, w, t, r) proc_ ## d ## _ ## w(t, r)
78 #define UIOMOVE_FROMBUF(k, u) uiomove_frombuf(& k, sizeof(k), u)
79 #endif
80
81 int
82 procfs_doprocfpregs(PFS_FILL_ARGS)
83 {
84 int error;
85 struct fpreg r;
86 struct thread *td2;
87 #ifdef COMPAT_IA32
88 struct fpreg32 r32;
89 int wrap32 = 0;
90 #endif
91
92 if (uio->uio_offset != 0)
93 return (0);
94
95 PROC_LOCK(p);
96 KASSERT(p->p_lock > 0, ("proc not held"));
97 if (p_candebug(td, p)) {
98 PROC_UNLOCK(p);
99 return (EPERM);
100 }
101
102 /* XXXKSE: */
103 td2 = FIRST_THREAD_IN_PROC(p);
104 #ifdef COMPAT_IA32
105 if (td->td_proc->p_sysent == &ia32_freebsd_sysvec) {
106 if (td2->td_proc->p_sysent != &ia32_freebsd_sysvec) {
107 PROC_UNLOCK(p);
108 return (EINVAL);
109 }
110 wrap32 = 1;
111 }
112 #endif
113 error = PROC(read, fpregs, td2, &r);
114 if (error == 0) {
115 PROC_UNLOCK(p);
116 error = UIOMOVE_FROMBUF(r, uio);
117 PROC_LOCK(p);
118 }
119 if (error == 0 && uio->uio_rw == UIO_WRITE) {
120 if (!P_SHOULDSTOP(p))
121 error = EBUSY;
122 else
123 /* XXXKSE: */
124 error = PROC(write, fpregs, td2, &r);
125 }
126 PROC_UNLOCK(p);
127
128 return (error);
129 }
Cache object: 9c8f933506666c6d2a9f83b741d7b032
|