setemul.c revision 1.20
1 /* $NetBSD: setemul.c,v 1.20 2005/01/15 17:55:38 jdolecek 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. Neither the name of the University nor the names of its contributors 54 * may be used to endorse or promote products derived from this software 55 * without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 67 * SUCH DAMAGE. 68 */ 69 70 #include <sys/cdefs.h> 71 #ifndef lint 72 __RCSID("$NetBSD: setemul.c,v 1.20 2005/01/15 17:55:38 jdolecek Exp $"); 73 #endif /* not lint */ 74 75 #include <sys/param.h> 76 #include <sys/errno.h> 77 #include <sys/time.h> 78 #include <sys/queue.h> 79 80 #include <err.h> 81 #include <stdio.h> 82 #include <stdlib.h> 83 #include <string.h> 84 #include <unistd.h> 85 #include <vis.h> 86 87 #include "setemul.h" 88 89 #include <sys/syscall.h> 90 91 #include "../../sys/compat/netbsd32/netbsd32_syscall.h" 92 #include "../../sys/compat/freebsd/freebsd_syscall.h" 93 #include "../../sys/compat/hpux/hpux_syscall.h" 94 #include "../../sys/compat/ibcs2/ibcs2_syscall.h" 95 #include "../../sys/compat/irix/irix_syscall.h" 96 #include "../../sys/compat/linux/linux_syscall.h" 97 #include "../../sys/compat/mach/mach_syscall.h" 98 #include "../../sys/compat/darwin/darwin_syscall.h" 99 #include "../../sys/compat/mach/arch/powerpc/ppccalls/mach_ppccalls_syscall.h" 100 #include "../../sys/compat/mach/arch/powerpc/fasttraps/mach_fasttraps_syscall.h" 101 #include "../../sys/compat/osf1/osf1_syscall.h" 102 #include "../../sys/compat/sunos32/sunos32_syscall.h" 103 #include "../../sys/compat/sunos/sunos_syscall.h" 104 #include "../../sys/compat/svr4/svr4_syscall.h" 105 #include "../../sys/compat/svr4_32/svr4_32_syscall.h" 106 #include "../../sys/compat/ultrix/ultrix_syscall.h" 107 108 #define KTRACE 109 #include "../../sys/kern/syscalls.c" 110 111 #include "../../sys/compat/netbsd32/netbsd32_syscalls.c" 112 #include "../../sys/compat/freebsd/freebsd_syscalls.c" 113 #include "../../sys/compat/hpux/hpux_syscalls.c" 114 #include "../../sys/compat/ibcs2/ibcs2_syscalls.c" 115 #include "../../sys/compat/irix/irix_syscalls.c" 116 #include "../../sys/compat/linux/linux_syscalls.c" 117 #include "../../sys/compat/darwin/darwin_syscalls.c" 118 #include "../../sys/compat/mach/mach_syscalls.c" 119 #include "../../sys/compat/mach/arch/powerpc/ppccalls/mach_ppccalls_syscalls.c" 120 #include "../../sys/compat/mach/arch/powerpc/fasttraps/mach_fasttraps_syscalls.c" 121 #include "../../sys/compat/osf1/osf1_syscalls.c" 122 #include "../../sys/compat/sunos/sunos_syscalls.c" 123 #include "../../sys/compat/sunos32/sunos32_syscalls.c" 124 #include "../../sys/compat/svr4/svr4_syscalls.c" 125 #include "../../sys/compat/svr4_32/svr4_32_syscalls.c" 126 #include "../../sys/compat/ultrix/ultrix_syscalls.c" 127 128 #include "../../sys/compat/hpux/hpux_errno.c" 129 #include "../../sys/compat/svr4/svr4_errno.c" 130 #include "../../sys/compat/ibcs2/ibcs2_errno.c" 131 #include "../../sys/compat/irix/irix_errno.c" 132 #include "../../sys/compat/osf1/osf1_errno.c" 133 #include "../../sys/compat/linux/common/linux_errno.c" 134 #undef KTRACE 135 136 #define SIGRTMIN 33 /* XXX */ 137 #include "../../sys/compat/hpux/hpux_signo.c" 138 #include "../../sys/compat/svr4/svr4_signo.c" 139 #include "../../sys/compat/ibcs2/ibcs2_signo.c" 140 /* irix uses svr4 */ 141 #include "../../sys/compat/osf1/osf1_signo.c" 142 #include "../../sys/compat/linux/common/linux_signo.c" 143 144 /* For Mach services names in MMSG traces */ 145 #ifndef LETS_GET_SMALL 146 #include "../../sys/compat/mach/mach_services_names.c" 147 #endif 148 149 #define NELEM(a) (sizeof(a) / sizeof(a[0])) 150 151 /* static */ 152 const struct emulation emulations[] = { 153 { "netbsd", syscallnames, SYS_MAXSYSCALL, 154 NULL, 0, 155 NULL, 0, 0 }, 156 157 { "netbsd32", netbsd32_syscallnames, SYS_MAXSYSCALL, 158 NULL, 0, 159 NULL, 0, EMUL_FLAG_NETBSD32 }, 160 161 { "freebsd", freebsd_syscallnames, FREEBSD_SYS_MAXSYSCALL, 162 NULL, 0, 163 NULL, 0, 0 }, 164 165 { "hpux", hpux_syscallnames, HPUX_SYS_MAXSYSCALL, 166 native_to_hpux_errno, NELEM(native_to_hpux_errno), 167 hpux_to_native_signo, NSIG, 0 }, 168 169 { "ibcs2", ibcs2_syscallnames, IBCS2_SYS_MAXSYSCALL, 170 native_to_ibcs2_errno, NELEM(native_to_ibcs2_errno), 171 ibcs2_to_native_signo, NSIG, 0 }, 172 173 { "irix o32", irix_syscallnames, IRIX_SYS_MAXSYSCALL, 174 native_to_irix_errno, NELEM(native_to_irix_errno), 175 svr4_to_native_signo, NSIG, 0 }, 176 177 { "irix n32", irix_syscallnames, IRIX_SYS_MAXSYSCALL, 178 native_to_irix_errno, NELEM(native_to_irix_errno), 179 svr4_to_native_signo, NSIG, 0 }, 180 181 { "linux", linux_syscallnames, LINUX_SYS_MAXSYSCALL, 182 native_to_linux_errno, NELEM(native_to_linux_errno), 183 linux_to_native_signo, NSIG, 0 }, 184 185 { "darwin", darwin_syscallnames, DARWIN_SYS_MAXSYSCALL, 186 NULL, 0, 187 NULL, 0, 0 }, 188 189 { "mach", mach_syscallnames, MACH_SYS_MAXSYSCALL, 190 NULL, 0, 191 NULL, 0, 0 }, 192 193 { "mach ppccalls", mach_ppccalls_syscallnames, 194 MACH_PPCCALLS_SYS_MAXSYSCALL, 195 NULL, 0, 196 NULL, 0, 0 }, 197 198 { "mach fasttraps", mach_fasttraps_syscallnames, 199 MACH_FASTTRAPS_SYS_MAXSYSCALL, 200 NULL, 0, 201 NULL, 0, 0 }, 202 203 { "osf1", osf1_syscallnames, OSF1_SYS_MAXSYSCALL, 204 native_to_osf1_errno, NELEM(native_to_osf1_errno), 205 osf1_to_native_signo, NSIG, 0 }, 206 207 { "sunos32", sunos32_syscallnames, SUNOS32_SYS_MAXSYSCALL, 208 NULL, 0, 209 NULL, 0, EMUL_FLAG_NETBSD32 }, 210 211 { "sunos", sunos_syscallnames, SUNOS_SYS_MAXSYSCALL, 212 NULL, 0, 213 NULL, 0, 0 }, 214 215 { "svr4", svr4_syscallnames, SVR4_SYS_MAXSYSCALL, 216 native_to_svr4_errno, NELEM(native_to_svr4_errno), 217 svr4_to_native_signo, NSIG, 0 }, 218 219 { "svr4_32", svr4_syscallnames, SVR4_SYS_MAXSYSCALL, 220 native_to_svr4_errno, NELEM(native_to_svr4_errno), 221 svr4_to_native_signo, NSIG, EMUL_FLAG_NETBSD32 }, 222 223 { "ultrix", ultrix_syscallnames, ULTRIX_SYS_MAXSYSCALL, 224 NULL, 0, 225 NULL, 0, 0 }, 226 227 { "pecoff", syscallnames, SYS_MAXSYSCALL, 228 NULL, 0, 229 NULL, 0, 0 }, 230 231 { NULL, NULL, 0, 232 NULL, 0, 233 NULL, 0, 0 } 234 }; 235 236 struct emulation_ctx { 237 pid_t pid; 238 const struct emulation *emulation; 239 LIST_ENTRY(emulation_ctx) ctx_link; 240 }; 241 242 const struct emulation *cur_emul; 243 const struct emulation *prev_emul; 244 /* Mach emulation require extra emulation contexts */ 245 static const struct emulation *mach; 246 static const struct emulation *mach_ppccalls; 247 static const struct emulation *mach_fasttraps; 248 249 static const struct emulation *default_emul = &emulations[0]; 250 251 struct emulation_ctx *current_ctx; 252 static LIST_HEAD(, emulation_ctx) emul_ctx = 253 LIST_HEAD_INITIALIZER(emul_ctx); 254 255 static struct emulation_ctx *ectx_find(pid_t); 256 static void ectx_update(pid_t, const struct emulation *); 257 258 void 259 setemul(const char *name, pid_t pid, int update_ectx) 260 { 261 int i; 262 const struct emulation *match = NULL; 263 264 for (i = 0; emulations[i].name != NULL; i++) { 265 if (strcmp(emulations[i].name, name) == 0) { 266 match = &emulations[i]; 267 break; 268 } 269 } 270 271 if (!match) { 272 warnx("Emulation `%s' unknown", name); 273 return; 274 } 275 276 if (update_ectx) 277 ectx_update(pid, match); 278 else 279 default_emul = match; 280 281 if (cur_emul != NULL) 282 prev_emul = cur_emul; 283 else 284 prev_emul = match; 285 286 cur_emul = match; 287 } 288 289 /* 290 * Emulation context list is very simple chained list, not even hashed. 291 * We expect the number of separate traced contexts/processes to be 292 * fairly low, so it's not worth it to optimize this. 293 * MMMmmmm not when I use it, it is only bounded PID_MAX! 294 * Requeue looked up item at start of list to cache result since the 295 * trace file tendes to have a burst of calls for a single process. 296 */ 297 298 /* 299 * Find an emulation context appropriate for the given pid. 300 */ 301 static struct emulation_ctx * 302 ectx_find(pid_t pid) 303 { 304 struct emulation_ctx *ctx; 305 306 /* Find an existing entry */ 307 LIST_FOREACH(ctx, &emul_ctx, ctx_link) { 308 if (ctx->pid == pid) 309 break; 310 } 311 312 if (ctx == NULL) { 313 /* create entry with default emulation */ 314 ctx = malloc(sizeof *ctx); 315 if (ctx == NULL) 316 err(1, "malloc emul context"); 317 ctx->pid = pid; 318 ctx->emulation = default_emul; 319 320 /* chain into the list */ 321 LIST_INSERT_HEAD(&emul_ctx, ctx, ctx_link); 322 } else { 323 /* move entry to head to optimize lookup for syscall bursts */ 324 LIST_REMOVE(ctx, ctx_link); 325 LIST_INSERT_HEAD(&emul_ctx, ctx, ctx_link); 326 } 327 328 return ctx; 329 } 330 331 /* 332 * Update emulation context for given pid, or create new if no context 333 * for this pid exists. 334 */ 335 static void 336 ectx_update(pid_t pid, const struct emulation *emul) 337 { 338 struct emulation_ctx *ctx; 339 340 ctx = ectx_find(pid); 341 ctx->emulation = emul; 342 } 343 344 /* 345 * Ensure current emulation context is correct for given pid. 346 */ 347 void 348 ectx_sanify(pid_t pid) 349 { 350 struct emulation_ctx *ctx; 351 352 ctx = ectx_find(pid); 353 cur_emul = ctx->emulation; 354 } 355 356 /* 357 * Delete emulation context for current pid. 358 * (eg when tracing exit()) 359 * Defer delete just in case we've cached a pointer... 360 */ 361 void 362 ectx_delete(void) 363 { 364 static struct emulation_ctx *ctx = NULL; 365 366 if (ctx != NULL) 367 free(ctx); 368 369 /* 370 * The emulation for current syscall entry is always on HEAD, due 371 * to code in ectx_find(). 372 */ 373 ctx = LIST_FIRST(&emul_ctx); 374 375 if (ctx) 376 LIST_REMOVE(ctx, ctx_link); 377 } 378 379 /* 380 * Temporarily modify code and emulations to handle Mach traps 381 * XXX The define are duplicated from sys/arch/powerpc/include/mach_syscall.c 382 */ 383 #define MACH_FASTTRAPS 0x00007ff0 384 #define MACH_PPCCALLS 0x00006000 385 #define MACH_ODD_SYSCALL_MASK 0x0000fff0 386 int 387 mach_traps_dispatch(int *code, const struct emulation **emul) 388 { 389 switch (*code & MACH_ODD_SYSCALL_MASK) { 390 case MACH_FASTTRAPS: 391 *emul = mach_fasttraps; 392 *code -= MACH_FASTTRAPS; 393 return 1; 394 395 case MACH_PPCCALLS: 396 *emul = mach_ppccalls; 397 *code -= MACH_PPCCALLS; 398 return 1; 399 400 default: 401 if (*code < 0) { 402 *emul = mach; 403 *code = -*code; 404 return 1; 405 } 406 return 0; 407 } 408 } 409 410 /* 411 * Lookup Machs emulations 412 */ 413 void 414 mach_lookup_emul(void) 415 { 416 const struct emulation *emul_idx; 417 418 for (emul_idx = emulations; emul_idx->name; emul_idx++) { 419 if (strcmp("mach", emul_idx->name) == 0) 420 mach = emul_idx; 421 if (strcmp("mach fasttraps", emul_idx->name) == 0) 422 mach_fasttraps = emul_idx; 423 if (strcmp("mach ppccalls", emul_idx->name) == 0) 424 mach_ppccalls = emul_idx; 425 } 426 if (mach == NULL || mach_fasttraps == NULL || mach_ppccalls == NULL) { 427 errx(1, "Cannot load mach emulations"); 428 exit(1); 429 } 430 return; 431 } 432 433 /* 434 * Find the name of the Mach service responsible to a given message Id 435 */ 436 const char * 437 mach_service_name(id) 438 int id; 439 { 440 const char *retval = NULL; 441 #ifndef LETS_GET_SMALL 442 struct mach_service_name *srv; 443 444 for (srv = mach_services_names; srv->srv_id; srv++) 445 if (srv->srv_id == id) 446 break; 447 retval = srv->srv_name; 448 #endif /* LETS_GET_SMALL */ 449 450 return retval; 451 } 452
Indexes created Tue Sep 23 22:09:46 GMT 2025