setemul.c revision 1.15
1 /* $NetBSD: setemul.c,v 1.15 2003/08/07 11:14:13 agc 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 1.15 2003/08/07 11:14:13 agc 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 #define NELEM(a) (sizeof(a) / sizeof(a[0])) 144 145 /* static */ 146 const struct emulation emulations[] = { 147 { "netbsd", syscallnames, SYS_MAXSYSCALL, 148 NULL, 0, 149 NULL, 0 }, 150 151 { "netbsd32", netbsd32_syscallnames, SYS_MAXSYSCALL, 152 NULL, 0, 153 NULL, 0 }, 154 155 { "freebsd", freebsd_syscallnames, FREEBSD_SYS_MAXSYSCALL, 156 NULL, 0, 157 NULL, 0 }, 158 159 { "hpux", hpux_syscallnames, HPUX_SYS_MAXSYSCALL, 160 native_to_hpux_errno, NELEM(native_to_hpux_errno), 161 hpux_to_native_signo, NSIG }, 162 163 { "ibcs2", ibcs2_syscallnames, IBCS2_SYS_MAXSYSCALL, 164 native_to_ibcs2_errno, NELEM(native_to_ibcs2_errno), 165 ibcs2_to_native_signo, NSIG }, 166 167 { "irix o32", irix_syscallnames, IRIX_SYS_MAXSYSCALL, 168 native_to_irix_errno, NELEM(native_to_irix_errno), 169 svr4_to_native_signo, NSIG }, 170 171 { "irix n32", irix_syscallnames, IRIX_SYS_MAXSYSCALL, 172 native_to_irix_errno, NELEM(native_to_irix_errno), 173 svr4_to_native_signo, NSIG }, 174 175 { "linux", linux_syscallnames, LINUX_SYS_MAXSYSCALL, 176 native_to_linux_errno, NELEM(native_to_linux_errno), 177 linux_to_native_signo, NSIG }, 178 179 { "darwin", darwin_syscallnames, DARWIN_SYS_MAXSYSCALL, 180 NULL, 0, 181 NULL, 0 }, 182 183 { "mach", mach_syscallnames, MACH_SYS_MAXSYSCALL, 184 NULL, 0, 185 NULL, 0 }, 186 187 { "mach ppccalls", mach_ppccalls_syscallnames, 188 MACH_PPCCALLS_SYS_MAXSYSCALL, 189 NULL, 0, 190 NULL, 0 }, 191 192 { "mach fasttraps", mach_fasttraps_syscallnames, 193 MACH_FASTTRAPS_SYS_MAXSYSCALL, 194 NULL, 0, 195 NULL, 0 }, 196 197 { "osf1", osf1_syscallnames, OSF1_SYS_MAXSYSCALL, 198 native_to_osf1_errno, NELEM(native_to_osf1_errno), 199 osf1_to_native_signo, NSIG }, 200 201 { "sunos32", sunos32_syscallnames, SUNOS32_SYS_MAXSYSCALL, 202 NULL, 0, 203 NULL, 0 }, 204 205 { "sunos", sunos_syscallnames, SUNOS_SYS_MAXSYSCALL, 206 NULL, 0, 207 NULL, 0 }, 208 209 { "svr4", svr4_syscallnames, SVR4_SYS_MAXSYSCALL, 210 native_to_svr4_errno, NELEM(native_to_svr4_errno), 211 svr4_to_native_signo, NSIG }, 212 213 { "svr4_32", svr4_syscallnames, SVR4_SYS_MAXSYSCALL, 214 native_to_svr4_errno, NELEM(native_to_svr4_errno), 215 svr4_to_native_signo, NSIG }, 216 217 { "ultrix", ultrix_syscallnames, ULTRIX_SYS_MAXSYSCALL, 218 NULL, 0, 219 NULL, 0 }, 220 221 { "pecoff", syscallnames, SYS_MAXSYSCALL, 222 NULL, 0, 223 NULL, 0 }, 224 225 { NULL, NULL, 0, 226 NULL, 0, 227 NULL, 0 } 228 }; 229 230 struct emulation_ctx { 231 pid_t pid; 232 const struct emulation *emulation; 233 struct emulation_ctx *next; 234 }; 235 236 const struct emulation *current; 237 const struct emulation *previous; 238 /* Mach emulation require extra emulation contexts */ 239 const struct emulation *mach; 240 const struct emulation *mach_ppccalls; 241 const struct emulation *mach_fasttraps; 242 243 static const struct emulation *default_emul=NULL; 244 245 struct emulation_ctx *current_ctx; 246 struct emulation_ctx *emul_ctx = NULL; 247 248 static struct emulation_ctx *ectx_find __P((pid_t)); 249 static void ectx_update __P((pid_t, const struct emulation *)); 250 251 void 252 setemul(name, pid, update_ectx) 253 const char *name; 254 pid_t pid; 255 int update_ectx; 256 { 257 int i; 258 const struct emulation *match = NULL; 259 260 for (i = 0; emulations[i].name != NULL; i++) { 261 if (strcmp(emulations[i].name, name) == 0) { 262 match = &emulations[i]; 263 break; 264 } 265 } 266 267 if (!match) { 268 warnx("Emulation `%s' unknown", name); 269 return; 270 } 271 272 if (update_ectx) 273 ectx_update(pid, match); 274 275 if (!default_emul) 276 default_emul = match; 277 278 if (current != NULL) 279 previous = current; 280 else 281 previous = match; 282 283 current = match; 284 } 285 286 /* 287 * Emulation context list is very simple chained list, not even hashed. 288 * We expect the number of separate traced contexts/processes to be 289 * fairly low, so it's not worth it to optimize this. 290 */ 291 292 /* 293 * Find an emulation context appropriate for the given pid. 294 */ 295 static struct emulation_ctx * 296 ectx_find(pid) 297 pid_t pid; 298 { 299 struct emulation_ctx *ctx; 300 301 for(ctx = emul_ctx; ctx != NULL; ctx = ctx->next) { 302 if (ctx->pid == pid) 303 return ctx; 304 } 305 306 return NULL; 307 } 308 309 /* 310 * Update emulation context for given pid, or create new if no context 311 * for this pid exists. 312 */ 313 static void 314 ectx_update(pid, emul) 315 pid_t pid; 316 const struct emulation *emul; 317 { 318 struct emulation_ctx *ctx; 319 320 321 if ((ctx = ectx_find(pid)) != NULL) { 322 /* found and entry, ensure the emulation is right (exec!) */ 323 ctx->emulation = emul; 324 return; 325 } 326 327 ctx = (struct emulation_ctx *)malloc(sizeof(struct emulation_ctx)); 328 ctx->pid = pid; 329 ctx->emulation = emul; 330 331 /* put the entry on start of emul_ctx chain */ 332 ctx->next = emul_ctx; 333 emul_ctx = ctx; 334 } 335 336 /* 337 * Ensure current emulation context is correct for given pid. 338 */ 339 void 340 ectx_sanify(pid) 341 pid_t pid; 342 { 343 struct emulation_ctx *ctx; 344 345 if ((ctx = ectx_find(pid)) != NULL) 346 current = ctx->emulation; 347 else if (default_emul) 348 current = default_emul; 349 else 350 current = &emulations[0]; /* NetBSD */ 351 } 352 353 /* 354 * Temporarily modify code and emulations to handle Mach traps 355 * XXX The define are duplicated from sys/arch/powerpc/include/mach_syscall.c 356 */ 357 #define MACH_FASTTRAPS 0x00007ff0 358 #define MACH_PPCCALLS 0x00006000 359 #define MACH_ODD_SYSCALL_MASK 0x0000fff0 360 int 361 mach_traps_dispatch(code, emul) 362 int *code; 363 const struct emulation **emul; 364 { 365 switch (*code & MACH_ODD_SYSCALL_MASK) { 366 case MACH_FASTTRAPS: 367 *emul = mach_fasttraps; 368 *code -= MACH_FASTTRAPS; 369 return 1; 370 break; 371 372 case MACH_PPCCALLS: 373 *emul = mach_ppccalls; 374 *code -= MACH_PPCCALLS; 375 return 1; 376 break; 377 378 default: 379 if (*code < 0) { 380 *emul = mach; 381 *code = -*code; 382 return 1; 383 } 384 break; 385 } 386 return 0; 387 } 388 389 /* 390 * Lookup Machs emulations 391 */ 392 void 393 mach_lookup_emul(void) { 394 const struct emulation *emul_idx; 395 396 for (emul_idx = emulations; emul_idx->name; emul_idx++) { 397 if (strcmp("mach", emul_idx->name) == 0) 398 mach = emul_idx; 399 if (strcmp("mach fasttraps", emul_idx->name) == 0) 400 mach_fasttraps = emul_idx; 401 if (strcmp("mach ppccalls", emul_idx->name) == 0) 402 mach_ppccalls = emul_idx; 403 } 404 if (mach == NULL || mach_fasttraps == NULL || mach_ppccalls == NULL) { 405 errx(1, "Cannot load mach emulations"); 406 exit(1); 407 } 408 return; 409 } 410
Indexes created Wed Sep 24 14:09:57 GMT 2025