1 /* $NetBSD: setemul.c,v 1.2 2000/04/10 09:34:18 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. 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 1.2 2000/04/10 09:34:18 jdolecek 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/linux/linux_syscall.h" 99 #include "../../sys/compat/osf1/osf1_syscall.h" 100 #include "../../sys/compat/sunos/sunos_syscall.h" 101 #include "../../sys/compat/svr4/svr4_syscall.h" 102 #include "../../sys/compat/ultrix/ultrix_syscall.h" 103 104 #define KTRACE 105 #include "../../sys/kern/syscalls.c" 106 107 #include "../../sys/compat/netbsd32/netbsd32_syscalls.c" 108 #include "../../sys/compat/freebsd/freebsd_syscalls.c" 109 #include "../../sys/compat/hpux/hpux_syscalls.c" 110 #include "../../sys/compat/ibcs2/ibcs2_syscalls.c" 111 #include "../../sys/compat/linux/linux_syscalls.c" 112 #include "../../sys/compat/osf1/osf1_syscalls.c" 113 #include "../../sys/compat/sunos/sunos_syscalls.c" 114 #include "../../sys/compat/svr4/svr4_syscalls.c" 115 #include "../../sys/compat/ultrix/ultrix_syscalls.c" 116 117 #include "../../sys/compat/hpux/hpux_errno.c" 118 #include "../../sys/compat/svr4/svr4_errno.c" 119 #include "../../sys/compat/ibcs2/ibcs2_errno.c" 120 #include "../../sys/compat/linux/common/linux_errno.c" 121 #undef KTRACE 122 123 #define NELEM(a) (sizeof(a) / sizeof(a[0])) 124 125 static struct emulation emulations[] = { 126 { "netbsd", syscallnames, SYS_MAXSYSCALL, 127 NULL, 0 }, 128 { "netbsd32", netbsd32_syscallnames, SYS_MAXSYSCALL, 129 NULL, 0 }, 130 { "freebsd", freebsd_syscallnames, FREEBSD_SYS_MAXSYSCALL, 131 NULL, 0 }, 132 { "hpux", hpux_syscallnames, HPUX_SYS_MAXSYSCALL, 133 native_to_hpux_errno, NELEM(native_to_hpux_errno) }, 134 { "ibcs2", ibcs2_syscallnames, IBCS2_SYS_MAXSYSCALL, 135 native_to_ibcs2_errno, NELEM(native_to_ibcs2_errno) }, 136 { "linux", linux_syscallnames, LINUX_SYS_MAXSYSCALL, 137 native_to_linux_errno, NELEM(native_to_linux_errno) }, 138 { "osf1", osf1_syscallnames, OSF1_SYS_MAXSYSCALL, 139 NULL, 0 }, 140 { "sunos", sunos_syscallnames, SUNOS_SYS_MAXSYSCALL, 141 NULL, 0 }, 142 { "svr4", svr4_syscallnames, SVR4_SYS_MAXSYSCALL, 143 native_to_svr4_errno, NELEM(native_to_svr4_errno) }, 144 { "ultrix", ultrix_syscallnames, ULTRIX_SYS_MAXSYSCALL, 145 NULL, 0 }, 146 { NULL, NULL, 0, 147 NULL, 0 } 148 }; 149 150 struct emulation_ctx { 151 pid_t pid; 152 struct emulation *emulation; 153 struct emulation_ctx *next; 154 }; 155 156 struct emulation *current; 157 158 static struct emulation *default_emul=NULL; 159 160 struct emulation_ctx *current_ctx; 161 struct emulation_ctx *emul_ctx = NULL; 162 163 static struct emulation_ctx *ectx_find __P((pid_t)); 164 static void ectx_update __P((pid_t, struct emulation *)); 165 166 void 167 setemul(name, pid, update_ectx) 168 const char *name; 169 pid_t pid; 170 int update_ectx; 171 { 172 int i; 173 struct emulation *match = NULL; 174 175 for (i = 0; emulations[i].name != NULL; i++) { 176 if (strcmp(emulations[i].name, name) == 0) { 177 match = &emulations[i]; 178 break; 179 } 180 } 181 182 if (!match) { 183 warnx("Emulation `%s' unknown", name); 184 return; 185 } 186 187 if (update_ectx) 188 ectx_update(pid, match); 189 190 if (!default_emul) 191 default_emul = match; 192 193 current = match; 194 } 195 196 /* 197 * Emulation context list is very simple chained list, not even hashed. 198 * We expect the number of separate traced contexts/processes to be 199 * fairly low, so it's not worth it to optimize this. 200 */ 201 202 /* 203 * Find an emulation context appropriate for the given pid. 204 */ 205 static struct emulation_ctx * 206 ectx_find(pid) 207 pid_t pid; 208 { 209 struct emulation_ctx *ctx; 210 211 for(ctx = emul_ctx; ctx != NULL; ctx = ctx->next) { 212 if (ctx->pid == pid) 213 return ctx; 214 } 215 216 return NULL; 217 } 218 219 /* 220 * Update emulation context for given pid, or create new if no context 221 * for this pid exists. 222 */ 223 static void 224 ectx_update(pid, emul) 225 pid_t pid; 226 struct emulation *emul; 227 { 228 struct emulation_ctx *ctx; 229 230 231 if ((ctx = ectx_find(pid)) != NULL) { 232 /* found and entry, ensure the emulation is right (exec!) */ 233 ctx->emulation = emul; 234 return; 235 } 236 237 ctx = (struct emulation_ctx *)malloc(sizeof(struct emulation_ctx)); 238 ctx->pid = pid; 239 ctx->emulation = emul; 240 241 /* put the entry on start of emul_ctx chain */ 242 ctx->next = emul_ctx; 243 emul_ctx = ctx; 244 } 245 246 /* 247 * Ensure current emulation context is correct for given pid. 248 */ 249 void 250 ectx_sanify(pid) 251 pid_t pid; 252 { 253 struct emulation_ctx *ctx; 254 255 if ((ctx = ectx_find(pid)) != NULL && ctx->emulation != current) 256 current = ctx->emulation; 257 else if (default_emul) 258 current = default_emul; 259 else 260 current = &emulations[0]; /* NetBSD */ 261 } 262