1 /*-
2 * Copyright (c) 2011 Konstantin Belousov <kib@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD: releng/9.1/sys/amd64/amd64/ptrace_machdep.c 235559 2012-05-17 19:01:13Z jhb $");
30
31 #include "opt_compat.h"
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/proc.h>
37 #include <sys/ptrace.h>
38 #include <sys/sysent.h>
39 #include <machine/md_var.h>
40 #include <machine/pcb.h>
41
42 static int
43 cpu_ptrace_xstate(struct thread *td, int req, void *addr, int data)
44 {
45 char *savefpu;
46 int error;
47
48 if (!use_xsave)
49 return (EOPNOTSUPP);
50
51 switch (req) {
52 case PT_GETXSTATE:
53 savefpu = (char *)(get_pcb_user_save_td(td) + 1);
54 error = copyout(savefpu, addr,
55 cpu_max_ext_state_size - sizeof(struct savefpu));
56 break;
57
58 case PT_SETXSTATE:
59 if (data > cpu_max_ext_state_size - sizeof(struct savefpu)) {
60 error = EINVAL;
61 break;
62 }
63 savefpu = malloc(data, M_TEMP, M_WAITOK);
64 error = copyin(addr, savefpu, data);
65 if (error == 0)
66 error = fpusetxstate(td, savefpu, data);
67 free(savefpu, M_TEMP);
68 break;
69
70 default:
71 error = EINVAL;
72 break;
73 }
74
75 return (error);
76 }
77
78 #ifdef COMPAT_FREEBSD32
79 #define PT_I386_GETXMMREGS (PT_FIRSTMACH + 0)
80 #define PT_I386_SETXMMREGS (PT_FIRSTMACH + 1)
81 #define PT_I386_GETXSTATE (PT_FIRSTMACH + 2)
82 #define PT_I386_SETXSTATE (PT_FIRSTMACH + 3)
83
84 static int
85 cpu32_ptrace(struct thread *td, int req, void *addr, int data)
86 {
87 struct savefpu *fpstate;
88 int error;
89
90 switch (req) {
91 case PT_I386_GETXMMREGS:
92 error = copyout(get_pcb_user_save_td(td), addr,
93 sizeof(*fpstate));
94 break;
95
96 case PT_I386_SETXMMREGS:
97 fpstate = get_pcb_user_save_td(td);
98 error = copyin(addr, fpstate, sizeof(*fpstate));
99 fpstate->sv_env.en_mxcsr &= cpu_mxcsr_mask;
100 break;
101
102 case PT_I386_GETXSTATE:
103 error = cpu_ptrace_xstate(td, PT_GETXSTATE, addr, data);
104 break;
105
106 case PT_I386_SETXSTATE:
107 error = cpu_ptrace_xstate(td, PT_SETXSTATE, addr, data);
108 break;
109
110 default:
111 error = EINVAL;
112 break;
113 }
114
115 return (error);
116 }
117 #endif
118
119 int
120 cpu_ptrace(struct thread *td, int req, void *addr, int data)
121 {
122 int error;
123
124 #ifdef COMPAT_FREEBSD32
125 if (SV_CURPROC_FLAG(SV_ILP32))
126 return (cpu32_ptrace(td, req, addr, data));
127 #endif
128
129 /* Support old values of PT_GETXSTATE and PT_SETXSTATE. */
130 if (req == PT_FIRSTMACH + 0)
131 req = PT_GETXSTATE;
132 if (req == PT_FIRSTMACH + 1)
133 req = PT_SETXSTATE;
134
135 switch (req) {
136 case PT_GETXSTATE:
137 case PT_SETXSTATE:
138 error = cpu_ptrace_xstate(td, req, addr, data);
139 break;
140
141 default:
142 error = EINVAL;
143 break;
144 }
145
146 return (error);
147 }
Cache object: c603f5047c48588c5605c1c33b5e921a
|