1 | /* $NetBSD: sys_ptrace.c,v 1.2 2016/11/03 03:57:05 pgoyette Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Andrew Doran. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | /*- |
33 | * Copyright (c) 1982, 1986, 1989, 1993 |
34 | * The Regents of the University of California. All rights reserved. |
35 | * (c) UNIX System Laboratories, Inc. |
36 | * All or some portions of this file are derived from material licensed |
37 | * to the University of California by American Telephone and Telegraph |
38 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
39 | * the permission of UNIX System Laboratories, Inc. |
40 | * |
41 | * This code is derived from software contributed to Berkeley by |
42 | * Jan-Simon Pendry. |
43 | * |
44 | * Redistribution and use in source and binary forms, with or without |
45 | * modification, are permitted provided that the following conditions |
46 | * are met: |
47 | * 1. Redistributions of source code must retain the above copyright |
48 | * notice, this list of conditions and the following disclaimer. |
49 | * 2. Redistributions in binary form must reproduce the above copyright |
50 | * notice, this list of conditions and the following disclaimer in the |
51 | * documentation and/or other materials provided with the distribution. |
52 | * 3. Neither the name of the University nor the names of its contributors |
53 | * may be used to endorse or promote products derived from this software |
54 | * without specific prior written permission. |
55 | * |
56 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
57 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
58 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
59 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
60 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
61 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
62 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
63 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
64 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
65 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
66 | * SUCH DAMAGE. |
67 | * |
68 | * from: @(#)sys_process.c 8.1 (Berkeley) 6/10/93 |
69 | */ |
70 | |
71 | /*- |
72 | * Copyright (c) 1993 Jan-Simon Pendry. |
73 | * Copyright (c) 1994 Christopher G. Demetriou. All rights reserved. |
74 | * |
75 | * This code is derived from software contributed to Berkeley by |
76 | * Jan-Simon Pendry. |
77 | * |
78 | * Redistribution and use in source and binary forms, with or without |
79 | * modification, are permitted provided that the following conditions |
80 | * are met: |
81 | * 1. Redistributions of source code must retain the above copyright |
82 | * notice, this list of conditions and the following disclaimer. |
83 | * 2. Redistributions in binary form must reproduce the above copyright |
84 | * notice, this list of conditions and the following disclaimer in the |
85 | * documentation and/or other materials provided with the distribution. |
86 | * 3. All advertising materials mentioning features or use of this software |
87 | * must display the following acknowledgement: |
88 | * This product includes software developed by the University of |
89 | * California, Berkeley and its contributors. |
90 | * 4. Neither the name of the University nor the names of its contributors |
91 | * may be used to endorse or promote products derived from this software |
92 | * without specific prior written permission. |
93 | * |
94 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
95 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
96 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
97 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
98 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
99 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
100 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
101 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
102 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
103 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
104 | * SUCH DAMAGE. |
105 | * |
106 | * from: @(#)sys_process.c 8.1 (Berkeley) 6/10/93 |
107 | */ |
108 | |
109 | /* |
110 | * References: |
111 | * (1) Bach's "The Design of the UNIX Operating System", |
112 | * (2) sys/miscfs/procfs from UCB's 4.4BSD-Lite distribution, |
113 | * (3) the "4.4BSD Programmer's Reference Manual" published |
114 | * by USENIX and O'Reilly & Associates. |
115 | * The 4.4BSD PRM does a reasonably good job of documenting what the various |
116 | * ptrace() requests should actually do, and its text is quoted several times |
117 | * in this file. |
118 | */ |
119 | |
120 | #include <sys/cdefs.h> |
121 | __KERNEL_RCSID(0, "$NetBSD: sys_ptrace.c,v 1.2 2016/11/03 03:57:05 pgoyette Exp $" ); |
122 | |
123 | #ifdef _KERNEL_OPT |
124 | #include "opt_ptrace.h" |
125 | #endif |
126 | |
127 | #include <sys/param.h> |
128 | #include <sys/systm.h> |
129 | #include <sys/proc.h> |
130 | #include <sys/errno.h> |
131 | #include <sys/exec.h> |
132 | #include <sys/pax.h> |
133 | #include <sys/ptrace.h> |
134 | #include <sys/uio.h> |
135 | #include <sys/ras.h> |
136 | #include <sys/kmem.h> |
137 | #include <sys/kauth.h> |
138 | #include <sys/mount.h> |
139 | #include <sys/syscallargs.h> |
140 | #include <sys/syscallvar.h> |
141 | #include <sys/syscall.h> |
142 | #include <sys/module.h> |
143 | |
144 | #include <uvm/uvm_extern.h> |
145 | |
146 | #include <machine/reg.h> |
147 | |
148 | /* |
149 | * PTRACE methods |
150 | */ |
151 | |
152 | static int ptrace_copyinpiod(struct ptrace_io_desc *, const void *); |
153 | static void ptrace_copyoutpiod(const struct ptrace_io_desc *, void *); |
154 | |
155 | static int |
156 | ptrace_copyinpiod(struct ptrace_io_desc *piod, const void *addr) |
157 | { |
158 | return copyin(addr, piod, sizeof(*piod)); |
159 | } |
160 | |
161 | static void |
162 | ptrace_copyoutpiod(const struct ptrace_io_desc *piod, void *addr) |
163 | { |
164 | (void) copyout(piod, addr, sizeof(*piod)); |
165 | } |
166 | |
167 | static struct ptrace_methods native_ptm = { |
168 | .ptm_copyinpiod = ptrace_copyinpiod, |
169 | .ptm_copyoutpiod = ptrace_copyoutpiod, |
170 | .ptm_doregs = process_doregs, |
171 | .ptm_dofpregs = process_dofpregs, |
172 | }; |
173 | |
174 | static const struct syscall_package ptrace_syscalls[] = { |
175 | { SYS_ptrace, 0, (sy_call_t *)sys_ptrace }, |
176 | { 0, 0, NULL }, |
177 | }; |
178 | |
179 | /* |
180 | * Process debugging system call. |
181 | */ |
182 | int |
183 | sys_ptrace(struct lwp *l, const struct sys_ptrace_args *uap, register_t *retval) |
184 | { |
185 | /* { |
186 | syscallarg(int) req; |
187 | syscallarg(pid_t) pid; |
188 | syscallarg(void *) addr; |
189 | syscallarg(int) data; |
190 | } */ |
191 | |
192 | return do_ptrace(&native_ptm, l, SCARG(uap, req), SCARG(uap, pid), |
193 | SCARG(uap, addr), SCARG(uap, data), retval); |
194 | } |
195 | |
196 | #define DEPS "ptrace_common" |
197 | |
198 | MODULE(MODULE_CLASS_EXEC, ptrace, DEPS); |
199 | |
200 | static int |
201 | ptrace_modcmd(modcmd_t cmd, void *arg) |
202 | { |
203 | int error; |
204 | |
205 | switch (cmd) { |
206 | case MODULE_CMD_INIT: |
207 | error = syscall_establish(&emul_netbsd, ptrace_syscalls); |
208 | break; |
209 | case MODULE_CMD_FINI: |
210 | error = syscall_disestablish(&emul_netbsd, ptrace_syscalls); |
211 | break; |
212 | default: |
213 | error = ENOTTY; |
214 | break; |
215 | } |
216 | return error; |
217 | } |
218 | |