1 /* $NetBSD: setemul.c,v 1.10 2001/12/02 16:18:01 manu 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 1.10 2001/12/02 16:18:01 manu 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/linux/common/linux_errno.c" 128 #undef KTRACE 129 130 #define NELEM(a) (sizeof(a) / sizeof(a[0])) 131 132 static const struct emulation emulations[] = { 133 { "netbsd", syscallnames, SYS_MAXSYSCALL, 134 NULL, 0 }, 135 { "netbsd32", netbsd32_syscallnames, SYS_MAXSYSCALL, 136 NULL, 0 }, 137 { "freebsd", freebsd_syscallnames, FREEBSD_SYS_MAXSYSCALL, 138 NULL, 0 }, 139 { "hpux", hpux_syscallnames, HPUX_SYS_MAXSYSCALL, 140 native_to_hpux_errno, NELEM(native_to_hpux_errno) }, 141 { "ibcs2", ibcs2_syscallnames, IBCS2_SYS_MAXSYSCALL, 142 native_to_ibcs2_errno, NELEM(native_to_ibcs2_errno) }, 143 { "irix", irix_syscallnames, IRIX_SYS_MAXSYSCALL, 144 native_to_irix_errno, NELEM(native_to_irix_errno) }, 145 { "linux", linux_syscallnames, LINUX_SYS_MAXSYSCALL, 146 native_to_linux_errno, NELEM(native_to_linux_errno) }, 147 { "osf1", osf1_syscallnames, OSF1_SYS_MAXSYSCALL, 148 NULL, 0 }, 149 { "sunos32",sunos32_syscallnames, SUNOS32_SYS_MAXSYSCALL, 150 NULL, 0 }, 151 { "sunos", sunos_syscallnames, SUNOS_SYS_MAXSYSCALL, 152 NULL, 0 }, 153 { "svr4", svr4_syscallnames, SVR4_SYS_MAXSYSCALL, 154 native_to_svr4_errno, NELEM(native_to_svr4_errno) }, 155 { "svr4_32", svr4_syscallnames, SVR4_SYS_MAXSYSCALL, 156 native_to_svr4_errno, NELEM(native_to_svr4_errno) }, 157 { "ultrix", ultrix_syscallnames, ULTRIX_SYS_MAXSYSCALL, 158 NULL, 0 }, 159 { "pecoff", syscallnames, SYS_MAXSYSCALL, 160 NULL, 0 }, 161 { NULL, NULL, 0, 162 NULL, 0 } 163 }; 164 165 struct emulation_ctx { 166 pid_t pid; 167 const struct emulation *emulation; 168 struct emulation_ctx *next; 169 }; 170 171 const struct emulation *current; 172 const struct emulation *previous; 173 174 static const struct emulation *default_emul=NULL; 175 176 struct emulation_ctx *current_ctx; 177 struct emulation_ctx *emul_ctx = NULL; 178 179 static struct emulation_ctx *ectx_find __P((pid_t)); 180 static void ectx_update __P((pid_t, const struct emulation *)); 181 182 void 183 setemul(name, pid, update_ectx) 184 const char *name; 185 pid_t pid; 186 int update_ectx; 187 { 188 int i; 189 const struct emulation *match = NULL; 190 191 for (i = 0; emulations[i].name != NULL; i++) { 192 if (strcmp(emulations[i].name, name) == 0) { 193 match = &emulations[i]; 194 break; 195 } 196 } 197 198 if (!match) { 199 warnx("Emulation `%s' unknown", name); 200 return; 201 } 202 203 if (update_ectx) 204 ectx_update(pid, match); 205 206 if (!default_emul) 207 default_emul = match; 208 209 if (current != NULL) 210 previous = current; 211 else 212 previous = match; 213 214 current = match; 215 } 216 217 /* 218 * Emulation context list is very simple chained list, not even hashed. 219 * We expect the number of separate traced contexts/processes to be 220 * fairly low, so it's not worth it to optimize this. 221 */ 222 223 /* 224 * Find an emulation context appropriate for the given pid. 225 */ 226 static struct emulation_ctx * 227 ectx_find(pid) 228 pid_t pid; 229 { 230 struct emulation_ctx *ctx; 231 232 for(ctx = emul_ctx; ctx != NULL; ctx = ctx->next) { 233 if (ctx->pid == pid) 234 return ctx; 235 } 236 237 return NULL; 238 } 239 240 /* 241 * Update emulation context for given pid, or create new if no context 242 * for this pid exists. 243 */ 244 static void 245 ectx_update(pid, emul) 246 pid_t pid; 247 const struct emulation *emul; 248 { 249 struct emulation_ctx *ctx; 250 251 252 if ((ctx = ectx_find(pid)) != NULL) { 253 /* found and entry, ensure the emulation is right (exec!) */ 254 ctx->emulation = emul; 255 return; 256 } 257 258 ctx = (struct emulation_ctx *)malloc(sizeof(struct emulation_ctx)); 259 ctx->pid = pid; 260 ctx->emulation = emul; 261 262 /* put the entry on start of emul_ctx chain */ 263 ctx->next = emul_ctx; 264 emul_ctx = ctx; 265 } 266 267 /* 268 * Ensure current emulation context is correct for given pid. 269 */ 270 void 271 ectx_sanify(pid) 272 pid_t pid; 273 { 274 struct emulation_ctx *ctx; 275 276 if ((ctx = ectx_find(pid)) != NULL) 277 current = ctx->emulation; 278 else if (default_emul) 279 current = default_emul; 280 else 281 current = &emulations[0]; /* NetBSD */ 282 } 283