1 /* $NetBSD: setemul.c,v 1.12 2002/03/31 22:44:03 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the NetBSD 18 * Foundation, Inc. and its contributors. 19 * 4. Neither the name of The NetBSD Foundation nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /* 37 * Copyright (c) 1988, 1993 38 * The Regents of the University of California. All rights reserved. 39 * (c) UNIX System Laboratories, Inc. 40 * All or some portions of this file are derived from material licensed 41 * to the University of California by American Telephone and Telegraph 42 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 43 * the permission of UNIX System Laboratories, Inc. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. All advertising materials mentioning features or use of this software 54 * must display the following acknowledgement: 55 * This product includes software developed by the University of 56 * California, Berkeley and its contributors. 57 * 4. Neither the name of the University nor the names of its contributors 58 * may be used to endorse or promote products derived from this software 59 * without specific prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 62 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 63 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 64 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 65 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 66 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 67 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 68 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 69 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 70 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 71 * SUCH DAMAGE. 72 */ 73 74 #include <sys/cdefs.h> 75 #ifndef lint 76 __RCSID("$NetBSD: setemul.c,v 1.12 2002/03/31 22:44:03 christos Exp $"); 77 #endif /* not lint */ 78 79 #include <sys/param.h> 80 #include <sys/errno.h> 81 #include <sys/time.h> 82 83 #include <err.h> 84 #include <stdio.h> 85 #include <stdlib.h> 86 #include <string.h> 87 #include <unistd.h> 88 #include <vis.h> 89 90 #include "setemul.h" 91 92 #include <sys/syscall.h> 93 94 #include "../../sys/compat/netbsd32/netbsd32_syscall.h" 95 #include "../../sys/compat/freebsd/freebsd_syscall.h" 96 #include "../../sys/compat/hpux/hpux_syscall.h" 97 #include "../../sys/compat/ibcs2/ibcs2_syscall.h" 98 #include "../../sys/compat/irix/irix_syscall.h" 99 #include "../../sys/compat/linux/linux_syscall.h" 100 #include "../../sys/compat/osf1/osf1_syscall.h" 101 #include "../../sys/compat/sunos32/sunos32_syscall.h" 102 #include "../../sys/compat/sunos/sunos_syscall.h" 103 #include "../../sys/compat/svr4/svr4_syscall.h" 104 #include "../../sys/compat/svr4_32/svr4_32_syscall.h" 105 #include "../../sys/compat/ultrix/ultrix_syscall.h" 106 107 #define KTRACE 108 #include "../../sys/kern/syscalls.c" 109 110 #include "../../sys/compat/netbsd32/netbsd32_syscalls.c" 111 #include "../../sys/compat/freebsd/freebsd_syscalls.c" 112 #include "../../sys/compat/hpux/hpux_syscalls.c" 113 #include "../../sys/compat/ibcs2/ibcs2_syscalls.c" 114 #include "../../sys/compat/irix/irix_syscalls.c" 115 #include "../../sys/compat/linux/linux_syscalls.c" 116 #include "../../sys/compat/osf1/osf1_syscalls.c" 117 #include "../../sys/compat/sunos/sunos_syscalls.c" 118 #include "../../sys/compat/sunos32/sunos32_syscalls.c" 119 #include "../../sys/compat/svr4/svr4_syscalls.c" 120 #include "../../sys/compat/svr4_32/svr4_32_syscalls.c" 121 #include "../../sys/compat/ultrix/ultrix_syscalls.c" 122 123 #include "../../sys/compat/hpux/hpux_errno.c" 124 #include "../../sys/compat/svr4/svr4_errno.c" 125 #include "../../sys/compat/ibcs2/ibcs2_errno.c" 126 #include "../../sys/compat/irix/irix_errno.c" 127 #include "../../sys/compat/osf1/osf1_errno.c" 128 #include "../../sys/compat/linux/common/linux_errno.c" 129 #undef KTRACE 130 131 #define SIGRTMIN 33 /* XXX */ 132 #include "../../sys/compat/hpux/hpux_signo.c" 133 #include "../../sys/compat/svr4/svr4_signo.c" 134 #include "../../sys/compat/ibcs2/ibcs2_signo.c" 135 /* irix uses svr4 */ 136 #include "../../sys/compat/osf1/osf1_signo.c" 137 #include "../../sys/compat/linux/common/linux_signo.c" 138 139 #define NELEM(a) (sizeof(a) / sizeof(a[0])) 140 141 static const struct emulation emulations[] = { 142 { "netbsd", syscallnames, SYS_MAXSYSCALL, 143 NULL, 0, 144 NULL, 0 }, 145 146 { "netbsd32", netbsd32_syscallnames, SYS_MAXSYSCALL, 147 NULL, 0, 148 NULL, 0 }, 149 150 { "freebsd", freebsd_syscallnames, FREEBSD_SYS_MAXSYSCALL, 151 NULL, 0, 152 NULL, 0 }, 153 154 { "hpux", hpux_syscallnames, HPUX_SYS_MAXSYSCALL, 155 native_to_hpux_errno, NELEM(native_to_hpux_errno), 156 hpux_to_native_signo, NSIG }, 157 158 { "ibcs2", ibcs2_syscallnames, IBCS2_SYS_MAXSYSCALL, 159 native_to_ibcs2_errno, NELEM(native_to_ibcs2_errno), 160 ibcs2_to_native_signo, NSIG }, 161 162 { "irix o32", irix_syscallnames, IRIX_SYS_MAXSYSCALL, 163 native_to_irix_errno, NELEM(native_to_irix_errno), 164 svr4_to_native_signo, NSIG }, 165 166 { "irix n32", irix_syscallnames, IRIX_SYS_MAXSYSCALL, 167 native_to_irix_errno, NELEM(native_to_irix_errno), 168 svr4_to_native_signo, NSIG }, 169 170 { "linux", linux_syscallnames, LINUX_SYS_MAXSYSCALL, 171 native_to_linux_errno, NELEM(native_to_linux_errno), 172 linux_to_native_signo, NSIG }, 173 174 { "osf1", osf1_syscallnames, OSF1_SYS_MAXSYSCALL, 175 native_to_osf1_errno, NELEM(native_to_osf1_errno), 176 osf1_to_native_signo, NSIG }, 177 178 { "sunos32", sunos32_syscallnames, SUNOS32_SYS_MAXSYSCALL, 179 NULL, 0, 180 NULL, 0 }, 181 182 { "sunos", sunos_syscallnames, SUNOS_SYS_MAXSYSCALL, 183 NULL, 0, 184 NULL, 0 }, 185 186 { "svr4", svr4_syscallnames, SVR4_SYS_MAXSYSCALL, 187 native_to_svr4_errno, NELEM(native_to_svr4_errno), 188 svr4_to_native_signo, NSIG }, 189 190 { "svr4_32", svr4_syscallnames, SVR4_SYS_MAXSYSCALL, 191 native_to_svr4_errno, NELEM(native_to_svr4_errno), 192 svr4_to_native_signo, NSIG }, 193 194 { "ultrix", ultrix_syscallnames, ULTRIX_SYS_MAXSYSCALL, 195 NULL, 0, 196 NULL, 0 }, 197 198 { "pecoff", syscallnames, SYS_MAXSYSCALL, 199 NULL, 0, 200 NULL, 0 }, 201 202 { NULL, NULL, 0, 203 NULL, 0, 204 NULL, 0 } 205 }; 206 207 struct emulation_ctx { 208 pid_t pid; 209 const struct emulation *emulation; 210 struct emulation_ctx *next; 211 }; 212 213 const struct emulation *current; 214 const struct emulation *previous; 215 216 static const struct emulation *default_emul=NULL; 217 218 struct emulation_ctx *current_ctx; 219 struct emulation_ctx *emul_ctx = NULL; 220 221 static struct emulation_ctx *ectx_find __P((pid_t)); 222 static void ectx_update __P((pid_t, const struct emulation *)); 223 224 void 225 setemul(name, pid, update_ectx) 226 const char *name; 227 pid_t pid; 228 int update_ectx; 229 { 230 int i; 231 const struct emulation *match = NULL; 232 233 for (i = 0; emulations[i].name != NULL; i++) { 234 if (strcmp(emulations[i].name, name) == 0) { 235 match = &emulations[i]; 236 break; 237 } 238 } 239 240 if (!match) { 241 warnx("Emulation `%s' unknown", name); 242 return; 243 } 244 245 if (update_ectx) 246 ectx_update(pid, match); 247 248 if (!default_emul) 249 default_emul = match; 250 251 if (current != NULL) 252 previous = current; 253 else 254 previous = match; 255 256 current = match; 257 } 258 259 /* 260 * Emulation context list is very simple chained list, not even hashed. 261 * We expect the number of separate traced contexts/processes to be 262 * fairly low, so it's not worth it to optimize this. 263 */ 264 265 /* 266 * Find an emulation context appropriate for the given pid. 267 */ 268 static struct emulation_ctx * 269 ectx_find(pid) 270 pid_t pid; 271 { 272 struct emulation_ctx *ctx; 273 274 for(ctx = emul_ctx; ctx != NULL; ctx = ctx->next) { 275 if (ctx->pid == pid) 276 return ctx; 277 } 278 279 return NULL; 280 } 281 282 /* 283 * Update emulation context for given pid, or create new if no context 284 * for this pid exists. 285 */ 286 static void 287 ectx_update(pid, emul) 288 pid_t pid; 289 const struct emulation *emul; 290 { 291 struct emulation_ctx *ctx; 292 293 294 if ((ctx = ectx_find(pid)) != NULL) { 295 /* found and entry, ensure the emulation is right (exec!) */ 296 ctx->emulation = emul; 297 return; 298 } 299 300 ctx = (struct emulation_ctx *)malloc(sizeof(struct emulation_ctx)); 301 ctx->pid = pid; 302 ctx->emulation = emul; 303 304 /* put the entry on start of emul_ctx chain */ 305 ctx->next = emul_ctx; 306 emul_ctx = ctx; 307 } 308 309 /* 310 * Ensure current emulation context is correct for given pid. 311 */ 312 void 313 ectx_sanify(pid) 314 pid_t pid; 315 { 316 struct emulation_ctx *ctx; 317 318 if ((ctx = ectx_find(pid)) != NULL) 319 current = ctx->emulation; 320 else if (default_emul) 321 current = default_emul; 322 else 323 current = &emulations[0]; /* NetBSD */ 324 } 325