sys_ptrace.c revision 1.8
1 /* $NetBSD: sys_ptrace.c,v 1.8 2020/10/19 14:52:19 kamil 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 #include <sys/cdefs.h> 110 __KERNEL_RCSID(0, "$NetBSD: sys_ptrace.c,v 1.8 2020/10/19 14:52:19 kamil Exp $"); 111 112 #ifdef _KERNEL_OPT 113 #include "opt_ptrace.h" 114 #endif 115 116 #include <sys/param.h> 117 #include <sys/systm.h> 118 #include <sys/proc.h> 119 #include <sys/errno.h> 120 #include <sys/exec.h> 121 #include <sys/pax.h> 122 #include <sys/ptrace.h> 123 #include <sys/uio.h> 124 #include <sys/ras.h> 125 #include <sys/kmem.h> 126 #include <sys/kauth.h> 127 #include <sys/mount.h> 128 #include <sys/syscallargs.h> 129 #include <sys/syscallvar.h> 130 #include <sys/syscall.h> 131 #include <sys/module.h> 132 133 #include <uvm/uvm_extern.h> 134 135 #include <machine/reg.h> 136 137 /* 138 * PTRACE methods 139 */ 140 141 static int 142 ptrace_copyin_piod(struct ptrace_io_desc *piod, const void *addr, size_t len) 143 { 144 if (len != 0 && sizeof(*piod) != len) 145 return EINVAL; 146 147 return copyin(addr, piod, sizeof(*piod)); 148 } 149 150 static int 151 ptrace_copyout_piod(const struct ptrace_io_desc *piod, void *addr, size_t len) 152 { 153 if (len != 0 && sizeof(*piod) != len) 154 return EINVAL; 155 156 return copyout(piod, addr, sizeof(*piod)); 157 } 158 159 static int 160 ptrace_copyin_siginfo(struct ptrace_siginfo *psi, const void *addr, size_t len) 161 { 162 if (sizeof(*psi) != len) 163 return EINVAL; 164 165 return copyin(addr, psi, sizeof(*psi)); 166 } 167 168 static int 169 ptrace_copyout_siginfo(const struct ptrace_siginfo *psi, void *addr, size_t len) 170 { 171 if (sizeof(*psi) != len) 172 return EINVAL; 173 174 return copyout(psi, addr, sizeof(*psi)); 175 } 176 177 static int 178 ptrace_copyout_lwpstatus(const struct ptrace_lwpstatus *pls, void *addr, 179 size_t len) 180 { 181 182 return copyout(pls, addr, len); 183 } 184 185 static struct ptrace_methods native_ptm = { 186 .ptm_copyin_piod = ptrace_copyin_piod, 187 .ptm_copyout_piod = ptrace_copyout_piod, 188 .ptm_copyin_siginfo = ptrace_copyin_siginfo, 189 .ptm_copyout_siginfo = ptrace_copyout_siginfo, 190 .ptm_copyout_lwpstatus = ptrace_copyout_lwpstatus, 191 .ptm_doregs = process_doregs, 192 .ptm_dofpregs = process_dofpregs, 193 .ptm_dodbregs = process_dodbregs, 194 }; 195 196 static const struct syscall_package ptrace_syscalls[] = { 197 { SYS_ptrace, 0, (sy_call_t *)sys_ptrace }, 198 { 0, 0, NULL }, 199 }; 200 201 /* 202 * Process debugging system call. 203 */ 204 int 205 sys_ptrace(struct lwp *l, const struct sys_ptrace_args *uap, register_t *retval) 206 { 207 /* { 208 syscallarg(int) req; 209 syscallarg(pid_t) pid; 210 syscallarg(void *) addr; 211 syscallarg(int) data; 212 } */ 213 214 return do_ptrace(&native_ptm, l, SCARG(uap, req), SCARG(uap, pid), 215 SCARG(uap, addr), SCARG(uap, data), retval); 216 } 217 218 #define DEPS "ptrace_common" 219 220 MODULE(MODULE_CLASS_EXEC, ptrace, DEPS); 221 222 static int 223 ptrace_modcmd(modcmd_t cmd, void *arg) 224 { 225 int error; 226 227 switch (cmd) { 228 case MODULE_CMD_INIT: 229 error = syscall_establish(&emul_netbsd, ptrace_syscalls); 230 break; 231 case MODULE_CMD_FINI: 232 error = syscall_disestablish(&emul_netbsd, ptrace_syscalls); 233 break; 234 default: 235 error = ENOTTY; 236 break; 237 } 238 return error; 239 } 240
Indexes created Tue Sep 30 11:09:46 GMT 2025