setemul.c revision 1.18
1 /* $NetBSD: setemul.c,v 1.18 2003/11/18 13:21:54 dsl 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 1.18 2003/11/18 13:21:54 dsl Exp $"); 73 #endif /* not lint */ 74 75 #include <sys/param.h> 76 #include <sys/errno.h> 77 #include <sys/time.h> 78 79 #include <err.h> 80 #include <stdio.h> 81 #include <stdlib.h> 82 #include <string.h> 83 #include <unistd.h> 84 #include <vis.h> 85 86 #include "setemul.h" 87 88 #include <sys/syscall.h> 89 90 #include "../../sys/compat/netbsd32/netbsd32_syscall.h" 91 #include "../../sys/compat/freebsd/freebsd_syscall.h" 92 #include "../../sys/compat/hpux/hpux_syscall.h" 93 #include "../../sys/compat/ibcs2/ibcs2_syscall.h" 94 #include "../../sys/compat/irix/irix_syscall.h" 95 #include "../../sys/compat/linux/linux_syscall.h" 96 #include "../../sys/compat/mach/mach_syscall.h" 97 #include "../../sys/compat/darwin/darwin_syscall.h" 98 #include "../../sys/compat/mach/arch/powerpc/ppccalls/mach_ppccalls_syscall.h" 99 #include "../../sys/compat/mach/arch/powerpc/fasttraps/mach_fasttraps_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/darwin/darwin_syscalls.c" 117 #include "../../sys/compat/mach/mach_syscalls.c" 118 #include "../../sys/compat/mach/arch/powerpc/ppccalls/mach_ppccalls_syscalls.c" 119 #include "../../sys/compat/mach/arch/powerpc/fasttraps/mach_fasttraps_syscalls.c" 120 #include "../../sys/compat/osf1/osf1_syscalls.c" 121 #include "../../sys/compat/sunos/sunos_syscalls.c" 122 #include "../../sys/compat/sunos32/sunos32_syscalls.c" 123 #include "../../sys/compat/svr4/svr4_syscalls.c" 124 #include "../../sys/compat/svr4_32/svr4_32_syscalls.c" 125 #include "../../sys/compat/ultrix/ultrix_syscalls.c" 126 127 #include "../../sys/compat/hpux/hpux_errno.c" 128 #include "../../sys/compat/svr4/svr4_errno.c" 129 #include "../../sys/compat/ibcs2/ibcs2_errno.c" 130 #include "../../sys/compat/irix/irix_errno.c" 131 #include "../../sys/compat/osf1/osf1_errno.c" 132 #include "../../sys/compat/linux/common/linux_errno.c" 133 #undef KTRACE 134 135 #define SIGRTMIN 33 /* XXX */ 136 #include "../../sys/compat/hpux/hpux_signo.c" 137 #include "../../sys/compat/svr4/svr4_signo.c" 138 #include "../../sys/compat/ibcs2/ibcs2_signo.c" 139 /* irix uses svr4 */ 140 #include "../../sys/compat/osf1/osf1_signo.c" 141 #include "../../sys/compat/linux/common/linux_signo.c" 142 143 /* For Mach services names in MMSG traces */ 144 #ifndef LETS_GET_SMALL 145 #include "../../sys/compat/mach/mach_services_names.c" 146 #endif 147 148 #define NELEM(a) (sizeof(a) / sizeof(a[0])) 149 150 /* static */ 151 const struct emulation emulations[] = { 152 { "netbsd", syscallnames, SYS_MAXSYSCALL, 153 NULL, 0, 154 NULL, 0 }, 155 156 { "netbsd32", netbsd32_syscallnames, SYS_MAXSYSCALL, 157 NULL, 0, 158 NULL, 0 }, 159 160 { "freebsd", freebsd_syscallnames, FREEBSD_SYS_MAXSYSCALL, 161 NULL, 0, 162 NULL, 0 }, 163 164 { "hpux", hpux_syscallnames, HPUX_SYS_MAXSYSCALL, 165 native_to_hpux_errno, NELEM(native_to_hpux_errno), 166 hpux_to_native_signo, NSIG }, 167 168 { "ibcs2", ibcs2_syscallnames, IBCS2_SYS_MAXSYSCALL, 169 native_to_ibcs2_errno, NELEM(native_to_ibcs2_errno), 170 ibcs2_to_native_signo, NSIG }, 171 172 { "irix o32", irix_syscallnames, IRIX_SYS_MAXSYSCALL, 173 native_to_irix_errno, NELEM(native_to_irix_errno), 174 svr4_to_native_signo, NSIG }, 175 176 { "irix n32", irix_syscallnames, IRIX_SYS_MAXSYSCALL, 177 native_to_irix_errno, NELEM(native_to_irix_errno), 178 svr4_to_native_signo, NSIG }, 179 180 { "linux", linux_syscallnames, LINUX_SYS_MAXSYSCALL, 181 native_to_linux_errno, NELEM(native_to_linux_errno), 182 linux_to_native_signo, NSIG }, 183 184 { "darwin", darwin_syscallnames, DARWIN_SYS_MAXSYSCALL, 185 NULL, 0, 186 NULL, 0 }, 187 188 { "mach", mach_syscallnames, MACH_SYS_MAXSYSCALL, 189 NULL, 0, 190 NULL, 0 }, 191 192 { "mach ppccalls", mach_ppccalls_syscallnames, 193 MACH_PPCCALLS_SYS_MAXSYSCALL, 194 NULL, 0, 195 NULL, 0 }, 196 197 { "mach fasttraps", mach_fasttraps_syscallnames, 198 MACH_FASTTRAPS_SYS_MAXSYSCALL, 199 NULL, 0, 200 NULL, 0 }, 201 202 { "osf1", osf1_syscallnames, OSF1_SYS_MAXSYSCALL, 203 native_to_osf1_errno, NELEM(native_to_osf1_errno), 204 osf1_to_native_signo, NSIG }, 205 206 { "sunos32", sunos32_syscallnames, SUNOS32_SYS_MAXSYSCALL, 207 NULL, 0, 208 NULL, 0 }, 209 210 { "sunos", sunos_syscallnames, SUNOS_SYS_MAXSYSCALL, 211 NULL, 0, 212 NULL, 0 }, 213 214 { "svr4", svr4_syscallnames, SVR4_SYS_MAXSYSCALL, 215 native_to_svr4_errno, NELEM(native_to_svr4_errno), 216 svr4_to_native_signo, NSIG }, 217 218 { "svr4_32", svr4_syscallnames, SVR4_SYS_MAXSYSCALL, 219 native_to_svr4_errno, NELEM(native_to_svr4_errno), 220 svr4_to_native_signo, NSIG }, 221 222 { "ultrix", ultrix_syscallnames, ULTRIX_SYS_MAXSYSCALL, 223 NULL, 0, 224 NULL, 0 }, 225 226 { "pecoff", syscallnames, SYS_MAXSYSCALL, 227 NULL, 0, 228 NULL, 0 }, 229 230 { NULL, NULL, 0, 231 NULL, 0, 232 NULL, 0 } 233 }; 234 235 struct emulation_ctx { 236 pid_t pid; 237 const struct emulation *emulation; 238 struct emulation_ctx *next; 239 }; 240 241 const struct emulation *cur_emul; 242 const struct emulation *prev_emul; 243 /* Mach emulation require extra emulation contexts */ 244 static const struct emulation *mach; 245 static const struct emulation *mach_ppccalls; 246 static const struct emulation *mach_fasttraps; 247 248 static const struct emulation *default_emul = &emulations[0]; 249 250 struct emulation_ctx *current_ctx; 251 static struct emulation_ctx emul_0 = {0, &emulations[0], NULL}; 252 struct emulation_ctx *emul_ctx = &emul_0; 253 254 static struct emulation_ctx *ectx_find(pid_t); 255 static void ectx_update(pid_t, const struct emulation *); 256 257 void 258 setemul(const char *name, pid_t pid, int update_ectx) 259 { 260 int i; 261 const struct emulation *match = NULL; 262 263 for (i = 0; emulations[i].name != NULL; i++) { 264 if (strcmp(emulations[i].name, name) == 0) { 265 match = &emulations[i]; 266 break; 267 } 268 } 269 270 if (!match) { 271 warnx("Emulation `%s' unknown", name); 272 return; 273 } 274 275 if (update_ectx) 276 ectx_update(pid, match); 277 else 278 default_emul = match; 279 280 if (cur_emul != NULL) 281 prev_emul = cur_emul; 282 else 283 prev_emul = match; 284 285 cur_emul = match; 286 } 287 288 /* 289 * Emulation context list is very simple chained list, not even hashed. 290 * We expect the number of separate traced contexts/processes to be 291 * fairly low, so it's not worth it to optimize this. 292 * MMMmmmm not when I use it, it is only bounded PID_MAX! 293 * Requeue looked up item at start of list to cache result since the 294 * trace file tendes to have a burst of calls for a single process. 295 */ 296 297 /* 298 * Find an emulation context appropriate for the given pid. 299 */ 300 static struct emulation_ctx * 301 ectx_find(pid_t pid) 302 { 303 struct emulation_ctx *ctx, **pctx; 304 305 /* Top of list is almost always right... (and list is never empty) */ 306 if (emul_ctx->pid == pid) 307 return emul_ctx; 308 309 for (pctx = &emul_ctx; ; pctx = &ctx->next) { 310 ctx = *pctx; 311 if (ctx == NULL) { 312 /* create entry with default emulation */ 313 ctx = malloc(sizeof *ctx); 314 if (ctx == NULL) 315 err(1, "malloc emul context"); 316 ctx->pid = pid; 317 ctx->emulation = default_emul; 318 break; 319 } 320 if (ctx->pid != pid) 321 continue; 322 /* Cut out of chain */ 323 *pctx = ctx->next; 324 } 325 /* Add at chain head */ 326 ctx->next = emul_ctx; 327 emul_ctx = ctx; 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; 365 struct emulation_ctx *nctx; 366 367 if (ctx != NULL) 368 free(ctx); 369 370 nctx = emul_ctx->next; 371 if (nctx == NULL) { 372 /* sanity - last item on list should never be killed */ 373 ctx = NULL; 374 return; 375 } 376 ctx = emul_ctx; 377 emul_ctx = nctx; 378 } 379 380 /* 381 * Temporarily modify code and emulations to handle Mach traps 382 * XXX The define are duplicated from sys/arch/powerpc/include/mach_syscall.c 383 */ 384 #define MACH_FASTTRAPS 0x00007ff0 385 #define MACH_PPCCALLS 0x00006000 386 #define MACH_ODD_SYSCALL_MASK 0x0000fff0 387 int 388 mach_traps_dispatch(int *code, const struct emulation **emul) 389 { 390 switch (*code & MACH_ODD_SYSCALL_MASK) { 391 case MACH_FASTTRAPS: 392 *emul = mach_fasttraps; 393 *code -= MACH_FASTTRAPS; 394 return 1; 395 396 case MACH_PPCCALLS: 397 *emul = mach_ppccalls; 398 *code -= MACH_PPCCALLS; 399 return 1; 400 401 default: 402 if (*code < 0) { 403 *emul = mach; 404 *code = -*code; 405 return 1; 406 } 407 return 0; 408 } 409 } 410 411 /* 412 * Lookup Machs emulations 413 */ 414 void 415 mach_lookup_emul(void) 416 { 417 const struct emulation *emul_idx; 418 419 for (emul_idx = emulations; emul_idx->name; emul_idx++) { 420 if (strcmp("mach", emul_idx->name) == 0) 421 mach = emul_idx; 422 if (strcmp("mach fasttraps", emul_idx->name) == 0) 423 mach_fasttraps = emul_idx; 424 if (strcmp("mach ppccalls", emul_idx->name) == 0) 425 mach_ppccalls = emul_idx; 426 } 427 if (mach == NULL || mach_fasttraps == NULL || mach_ppccalls == NULL) { 428 errx(1, "Cannot load mach emulations"); 429 exit(1); 430 } 431 return; 432 } 433 434 /* 435 * Find the name of the Mach service responsible to a given message Id 436 */ 437 const char * 438 mach_service_name(id) 439 int id; 440 { 441 const char *retval = NULL; 442 #ifndef LETS_GET_SMALL 443 struct mach_service_name *srv; 444 445 for (srv = mach_services_names; srv->srv_id; srv++) 446 if (srv->srv_id == id) 447 break; 448 retval = srv->srv_name; 449 #endif /* LETS_GET_SMALL */ 450 451 return retval; 452 } 453
Indexes created Wed Sep 24 05:09:52 GMT 2025