setemul.c revision 1.16
1 /* $NetBSD: setemul.c,v 1.16 2003/10/19 07:34:38 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. 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 1.16 2003/10/19 07:34:38 christos 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 static const struct emulation *mach; 240 static const struct emulation *mach_ppccalls; 241 static 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(pid_t); 249 static void ectx_update(pid_t, const struct emulation *); 250 251 void 252 setemul(const char *name, pid_t pid, int update_ectx) 253 { 254 int i; 255 const struct emulation *match = NULL; 256 257 for (i = 0; emulations[i].name != NULL; i++) { 258 if (strcmp(emulations[i].name, name) == 0) { 259 match = &emulations[i]; 260 break; 261 } 262 } 263 264 if (!match) { 265 warnx("Emulation `%s' unknown", name); 266 return; 267 } 268 269 if (update_ectx) 270 ectx_update(pid, match); 271 272 if (!default_emul) 273 default_emul = match; 274 275 if (current != NULL) 276 previous = current; 277 else 278 previous = match; 279 280 current = match; 281 } 282 283 /* 284 * Emulation context list is very simple chained list, not even hashed. 285 * We expect the number of separate traced contexts/processes to be 286 * fairly low, so it's not worth it to optimize this. 287 */ 288 289 /* 290 * Find an emulation context appropriate for the given pid. 291 */ 292 static struct emulation_ctx * 293 ectx_find(pid_t pid) 294 { 295 struct emulation_ctx *ctx; 296 297 for(ctx = emul_ctx; ctx != NULL; ctx = ctx->next) { 298 if (ctx->pid == pid) 299 return ctx; 300 } 301 302 return NULL; 303 } 304 305 /* 306 * Update emulation context for given pid, or create new if no context 307 * for this pid exists. 308 */ 309 static void 310 ectx_update(pid_t pid, const struct emulation *emul) 311 { 312 struct emulation_ctx *ctx; 313 314 315 if ((ctx = ectx_find(pid)) != NULL) { 316 /* found and entry, ensure the emulation is right (exec!) */ 317 ctx->emulation = emul; 318 return; 319 } 320 321 ctx = malloc(sizeof(*ctx)); 322 if (ctx == NULL) 323 err(1, NULL); 324 ctx->pid = pid; 325 ctx->emulation = emul; 326 327 /* put the entry on start of emul_ctx chain */ 328 ctx->next = emul_ctx; 329 emul_ctx = ctx; 330 } 331 332 /* 333 * Ensure current emulation context is correct for given pid. 334 */ 335 void 336 ectx_sanify(pid_t pid) 337 { 338 struct emulation_ctx *ctx; 339 340 if ((ctx = ectx_find(pid)) != NULL) 341 current = ctx->emulation; 342 else if (default_emul) 343 current = default_emul; 344 else 345 current = &emulations[0]; /* NetBSD */ 346 } 347 348 /* 349 * Temporarily modify code and emulations to handle Mach traps 350 * XXX The define are duplicated from sys/arch/powerpc/include/mach_syscall.c 351 */ 352 #define MACH_FASTTRAPS 0x00007ff0 353 #define MACH_PPCCALLS 0x00006000 354 #define MACH_ODD_SYSCALL_MASK 0x0000fff0 355 int 356 mach_traps_dispatch(int *code, const struct emulation **emul) 357 { 358 switch (*code & MACH_ODD_SYSCALL_MASK) { 359 case MACH_FASTTRAPS: 360 *emul = mach_fasttraps; 361 *code -= MACH_FASTTRAPS; 362 return 1; 363 364 case MACH_PPCCALLS: 365 *emul = mach_ppccalls; 366 *code -= MACH_PPCCALLS; 367 return 1; 368 369 default: 370 if (*code < 0) { 371 *emul = mach; 372 *code = -*code; 373 return 1; 374 } 375 return 0; 376 } 377 } 378 379 /* 380 * Lookup Machs emulations 381 */ 382 void 383 mach_lookup_emul(void) 384 { 385 const struct emulation *emul_idx; 386 387 for (emul_idx = emulations; emul_idx->name; emul_idx++) { 388 if (strcmp("mach", emul_idx->name) == 0) 389 mach = emul_idx; 390 if (strcmp("mach fasttraps", emul_idx->name) == 0) 391 mach_fasttraps = emul_idx; 392 if (strcmp("mach ppccalls", emul_idx->name) == 0) 393 mach_ppccalls = emul_idx; 394 } 395 if (mach == NULL || mach_fasttraps == NULL || mach_ppccalls == NULL) 396 errx(1, "Cannot load mach emulations"); 397 } 398
Indexes created Mon Sep 22 13:09:51 GMT 2025