| 1 | /* $NetBSD: compat_mod.c,v 1.24 2016/11/05 23:30:22 pgoyette Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2008 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software developed for The NetBSD Foundation |
| 8 | * by Andrew Doran. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | /* |
| 33 | * Linkage for the compat module: spaghetti. |
| 34 | */ |
| 35 | |
| 36 | #include <sys/cdefs.h> |
| 37 | __KERNEL_RCSID(0, "$NetBSD: compat_mod.c,v 1.24 2016/11/05 23:30:22 pgoyette Exp $" ); |
| 38 | |
| 39 | #ifdef _KERNEL_OPT |
| 40 | #include "opt_compat_netbsd.h" |
| 41 | #include "opt_compat_43.h" |
| 42 | #include "opt_ntp.h" |
| 43 | #include "opt_sysv.h" |
| 44 | #include "opt_lfs.h" |
| 45 | #endif |
| 46 | |
| 47 | #include <sys/systm.h> |
| 48 | #include <sys/module.h> |
| 49 | #include <sys/rwlock.h> |
| 50 | #include <sys/tty.h> |
| 51 | #include <sys/signalvar.h> |
| 52 | #include <sys/syscall.h> |
| 53 | #include <sys/syscallargs.h> |
| 54 | #include <sys/syscallvar.h> |
| 55 | #include <sys/sysctl.h> |
| 56 | |
| 57 | #include <uvm/uvm_extern.h> |
| 58 | #include <uvm/uvm_object.h> |
| 59 | |
| 60 | #include <compat/common/compat_util.h> |
| 61 | #include <compat/common/compat_mod.h> |
| 62 | #include <compat/common/if_43.h> |
| 63 | |
| 64 | #if defined(COMPAT_09) || defined(COMPAT_43) || defined(COMPAT_50) |
| 65 | static struct sysctllog *compat_clog = NULL; |
| 66 | #endif |
| 67 | |
| 68 | MODULE(MODULE_CLASS_EXEC, compat, NULL); |
| 69 | |
| 70 | int ttcompat(struct tty *, u_long, void *, int, struct lwp *); |
| 71 | |
| 72 | #ifdef _MODULE |
| 73 | #ifdef COMPAT_16 |
| 74 | #if !defined(__amd64__) || defined(COMPAT_NETBSD32) |
| 75 | #define COMPAT_SIGCONTEXT |
| 76 | extern char sigcode[], esigcode[]; |
| 77 | struct uvm_object *emul_netbsd_object; |
| 78 | #endif |
| 79 | #endif |
| 80 | #endif /* _MODULE */ |
| 81 | |
| 82 | extern krwlock_t exec_lock; |
| 83 | extern krwlock_t ttcompat_lock; |
| 84 | |
| 85 | static const struct syscall_package compat_syscalls[] = { |
| 86 | #if defined(COMPAT_43) |
| 87 | { SYS_compat_43_fstat43, 0, (sy_call_t *)compat_43_sys_fstat }, |
| 88 | { SYS_compat_43_lstat43, 0, (sy_call_t *)compat_43_sys_lstat }, |
| 89 | { SYS_compat_43_oaccept, 0, (sy_call_t *)compat_43_sys_accept }, |
| 90 | { SYS_compat_43_ocreat, 0, (sy_call_t *)compat_43_sys_creat }, |
| 91 | { SYS_compat_43_oftruncate, 0, (sy_call_t *)compat_43_sys_ftruncate }, |
| 92 | { SYS_compat_43_ogetdirentries, 0, (sy_call_t *)compat_43_sys_getdirentries }, |
| 93 | { SYS_compat_43_ogetdtablesize, 0, (sy_call_t *)compat_43_sys_getdtablesize }, |
| 94 | { SYS_compat_43_ogethostid, 0, (sy_call_t *)compat_43_sys_gethostid }, |
| 95 | { SYS_compat_43_ogethostname, 0, (sy_call_t *)compat_43_sys_gethostname }, |
| 96 | { SYS_compat_43_ogetkerninfo, 0, (sy_call_t *)compat_43_sys_getkerninfo }, |
| 97 | { SYS_compat_43_ogetpagesize, 0, (sy_call_t *)compat_43_sys_getpagesize }, |
| 98 | { SYS_compat_43_ogetpeername, 0, (sy_call_t *)compat_43_sys_getpeername }, |
| 99 | { SYS_compat_43_ogetrlimit, 0, (sy_call_t *)compat_43_sys_getrlimit }, |
| 100 | { SYS_compat_43_ogetsockname, 0, (sy_call_t *)compat_43_sys_getsockname }, |
| 101 | { SYS_compat_43_okillpg, 0, (sy_call_t *)compat_43_sys_killpg }, |
| 102 | { SYS_compat_43_olseek, 0, (sy_call_t *)compat_43_sys_lseek }, |
| 103 | { SYS_compat_43_ommap, 0, (sy_call_t *)compat_43_sys_mmap }, |
| 104 | { SYS_compat_43_oquota, 0, (sy_call_t *)compat_43_sys_quota }, |
| 105 | { SYS_compat_43_orecv, 0, (sy_call_t *)compat_43_sys_recv }, |
| 106 | { SYS_compat_43_orecvfrom, 0, (sy_call_t *)compat_43_sys_recvfrom }, |
| 107 | { SYS_compat_43_orecvmsg, 0, (sy_call_t *)compat_43_sys_recvmsg }, |
| 108 | { SYS_compat_43_osend, 0, (sy_call_t *)compat_43_sys_send }, |
| 109 | { SYS_compat_43_osendmsg, 0, (sy_call_t *)compat_43_sys_sendmsg }, |
| 110 | { SYS_compat_43_osethostid, 0, (sy_call_t *)compat_43_sys_sethostid }, |
| 111 | { SYS_compat_43_osethostname, 0, (sy_call_t *)compat_43_sys_sethostname }, |
| 112 | { SYS_compat_43_osetrlimit, 0, (sy_call_t *)compat_43_sys_setrlimit }, |
| 113 | { SYS_compat_43_osigblock, 0, (sy_call_t *)compat_43_sys_sigblock }, |
| 114 | { SYS_compat_43_osigsetmask, 0, (sy_call_t *)compat_43_sys_sigsetmask }, |
| 115 | { SYS_compat_43_osigstack, 0, (sy_call_t *)compat_43_sys_sigstack }, |
| 116 | { SYS_compat_43_osigvec, 0, (sy_call_t *)compat_43_sys_sigvec }, |
| 117 | { SYS_compat_43_otruncate, 0, (sy_call_t *)compat_43_sys_truncate }, |
| 118 | { SYS_compat_43_owait, 0, (sy_call_t *)compat_43_sys_wait }, |
| 119 | { SYS_compat_43_stat43, 0, (sy_call_t *)compat_43_sys_stat }, |
| 120 | #endif |
| 121 | |
| 122 | #if defined(COMPAT_09) |
| 123 | { SYS_compat_09_ogetdomainname, 0, (sy_call_t *)compat_09_sys_getdomainname }, |
| 124 | { SYS_compat_09_osetdomainname, 0, (sy_call_t *)compat_09_sys_setdomainname }, |
| 125 | { SYS_compat_09_ouname, 0, (sy_call_t *)compat_09_sys_uname }, |
| 126 | #endif |
| 127 | |
| 128 | #if defined(COMPAT_12) |
| 129 | { SYS_compat_12_fstat12, 0, (sy_call_t *)compat_12_sys_fstat }, |
| 130 | { SYS_compat_12_getdirentries, 0, (sy_call_t *)compat_12_sys_getdirentries }, |
| 131 | { SYS_compat_12_lstat12, 0, (sy_call_t *)compat_12_sys_lstat }, |
| 132 | { SYS_compat_12_msync, 0, (sy_call_t *)compat_12_sys_msync }, |
| 133 | { SYS_compat_12_oreboot, 0, (sy_call_t *)compat_12_sys_reboot }, |
| 134 | { SYS_compat_12_oswapon, 0, (sy_call_t *)compat_12_sys_swapon }, |
| 135 | { SYS_compat_12_stat12, 0, (sy_call_t *)compat_12_sys_stat }, |
| 136 | #endif |
| 137 | |
| 138 | #if defined(COMPAT_13) |
| 139 | { SYS_compat_13_sigaction13, 0, (sy_call_t *)compat_13_sys_sigaction }, |
| 140 | { SYS_compat_13_sigaltstack13, 0, (sy_call_t *)compat_13_sys_sigaltstack }, |
| 141 | { SYS_compat_13_sigpending13, 0, (sy_call_t *)compat_13_sys_sigpending }, |
| 142 | { SYS_compat_13_sigprocmask13, 0, (sy_call_t *)compat_13_sys_sigprocmask }, |
| 143 | { SYS_compat_13_sigreturn13, 0, (sy_call_t *)compat_13_sys_sigreturn }, |
| 144 | { SYS_compat_13_sigsuspend13, 0, (sy_call_t *)compat_13_sys_sigsuspend }, |
| 145 | #endif |
| 146 | |
| 147 | #if defined(COMPAT_16) |
| 148 | #if defined(COMPAT_SIGCONTEXT) |
| 149 | { SYS_compat_16___sigaction14, 0, (sy_call_t *)compat_16_sys___sigaction14 }, |
| 150 | { SYS_compat_16___sigreturn14, 0, (sy_call_t *)compat_16_sys___sigreturn14 }, |
| 151 | #endif |
| 152 | #endif |
| 153 | |
| 154 | #if defined(COMPAT_20) |
| 155 | { SYS_compat_20_fhstatfs, 0, (sy_call_t *)compat_20_sys_fhstatfs }, |
| 156 | { SYS_compat_20_fstatfs, 0, (sy_call_t *)compat_20_sys_fstatfs }, |
| 157 | { SYS_compat_20_getfsstat, 0, (sy_call_t *)compat_20_sys_getfsstat }, |
| 158 | { SYS_compat_20_statfs, 0, (sy_call_t *)compat_20_sys_statfs }, |
| 159 | #endif |
| 160 | |
| 161 | #if defined(COMPAT_30) |
| 162 | { SYS_compat_30___fhstat30, 0, (sy_call_t *)compat_30_sys___fhstat30 }, |
| 163 | { SYS_compat_30___fstat13, 0, (sy_call_t *)compat_30_sys___fstat13 }, |
| 164 | { SYS_compat_30___lstat13, 0, (sy_call_t *)compat_30_sys___lstat13 }, |
| 165 | { SYS_compat_30___stat13, 0, (sy_call_t *)compat_30_sys___stat13 }, |
| 166 | { SYS_compat_30_fhopen, 0, (sy_call_t *)compat_30_sys_fhopen }, |
| 167 | { SYS_compat_30_fhstat, 0, (sy_call_t *)compat_30_sys_fhstat }, |
| 168 | { SYS_compat_30_fhstatvfs1, 0, (sy_call_t *)compat_30_sys_fhstatvfs1 }, |
| 169 | { SYS_compat_30_getdents, 0, (sy_call_t *)compat_30_sys_getdents }, |
| 170 | { SYS_compat_30_getfh, 0, (sy_call_t *)compat_30_sys_getfh }, |
| 171 | { SYS_compat_30_socket, 0, (sy_call_t *)compat_30_sys_socket }, |
| 172 | #endif |
| 173 | |
| 174 | #if defined(COMPAT_40) |
| 175 | { SYS_compat_40_mount, 0, (sy_call_t *)compat_40_sys_mount }, |
| 176 | #endif |
| 177 | #if defined(COMPAT_50) |
| 178 | { SYS_compat_50_wait4, 0, (sy_call_t *)compat_50_sys_wait4 }, |
| 179 | { SYS_compat_50_mknod, 0, (sy_call_t *)compat_50_sys_mknod }, |
| 180 | { SYS_compat_50_setitimer, 0, (sy_call_t *)compat_50_sys_setitimer }, |
| 181 | { SYS_compat_50_getitimer, 0, (sy_call_t *)compat_50_sys_getitimer }, |
| 182 | { SYS_compat_50_select, 0, (sy_call_t *)compat_50_sys_select }, |
| 183 | { SYS_compat_50_gettimeofday, 0, (sy_call_t *)compat_50_sys_gettimeofday }, |
| 184 | { SYS_compat_50_getrusage, 0, (sy_call_t *)compat_50_sys_getrusage }, |
| 185 | { SYS_compat_50_settimeofday, 0, (sy_call_t *)compat_50_sys_settimeofday }, |
| 186 | { SYS_compat_50_utimes, 0, (sy_call_t *)compat_50_sys_utimes }, |
| 187 | { SYS_compat_50_adjtime, 0, (sy_call_t *)compat_50_sys_adjtime }, |
| 188 | #ifdef LFS |
| 189 | { SYS_compat_50_lfs_segwait, 0, (sy_call_t *)compat_50_sys_lfs_segwait }, |
| 190 | #endif |
| 191 | { SYS_compat_50_futimes, 0, (sy_call_t *)compat_50_sys_futimes }, |
| 192 | { SYS_compat_50_clock_gettime, 0, (sy_call_t *)compat_50_sys_clock_gettime }, |
| 193 | { SYS_compat_50_clock_settime, 0, (sy_call_t *)compat_50_sys_clock_settime }, |
| 194 | { SYS_compat_50_clock_getres, 0, (sy_call_t *)compat_50_sys_clock_getres }, |
| 195 | { SYS_compat_50_timer_settime, 0, (sy_call_t *)compat_50_sys_timer_settime }, |
| 196 | { SYS_compat_50_timer_gettime, 0, (sy_call_t *)compat_50_sys_timer_gettime }, |
| 197 | { SYS_compat_50_nanosleep, 0, (sy_call_t *)compat_50_sys_nanosleep }, |
| 198 | { SYS_compat_50___sigtimedwait, 0, (sy_call_t *)compat_50_sys___sigtimedwait }, |
| 199 | { SYS_compat_50_mq_timedsend, 0, (sy_call_t *)compat_50_sys_mq_timedsend }, |
| 200 | { SYS_compat_50_mq_timedreceive, 0, (sy_call_t *)compat_50_sys_mq_timedreceive }, |
| 201 | { SYS_compat_50_lutimes, 0, (sy_call_t *)compat_50_sys_lutimes }, |
| 202 | { SYS_compat_50__lwp_park, 0, (sy_call_t *)compat_50_sys__lwp_park }, |
| 203 | { SYS_compat_50_kevent, 0, (sy_call_t *)compat_50_sys_kevent }, |
| 204 | { SYS_compat_50_pselect, 0, (sy_call_t *)compat_50_sys_pselect }, |
| 205 | { SYS_compat_50_pollts, 0, (sy_call_t *)compat_50_sys_pollts }, |
| 206 | { SYS_compat_50___stat30, 0, (sy_call_t *)compat_50_sys___stat30 }, |
| 207 | { SYS_compat_50___fstat30, 0, (sy_call_t *)compat_50_sys___fstat30 }, |
| 208 | { SYS_compat_50___lstat30, 0, (sy_call_t *)compat_50_sys___lstat30 }, |
| 209 | # if defined(NTP) |
| 210 | { SYS_compat_50___ntp_gettime30, 0, (sy_call_t *)compat_50_sys___ntp_gettime30 }, |
| 211 | # endif |
| 212 | { SYS_compat_50___fhstat40, 0, (sy_call_t *)compat_50_sys___fhstat40 }, |
| 213 | { SYS_compat_50_aio_suspend, 0, (sy_call_t *)compat_50_sys_aio_suspend }, |
| 214 | { SYS_compat_50_quotactl, 0, (sy_call_t *)compat_50_sys_quotactl }, |
| 215 | #endif |
| 216 | #if defined(COMPAT_60) |
| 217 | { SYS_compat_60__lwp_park, 0, (sy_call_t *)compat_60_sys__lwp_park }, |
| 218 | #endif |
| 219 | { 0, 0, NULL }, |
| 220 | }; |
| 221 | |
| 222 | static int |
| 223 | compat_modcmd(modcmd_t cmd, void *arg) |
| 224 | { |
| 225 | #ifdef COMPAT_16 |
| 226 | proc_t *p; |
| 227 | #endif |
| 228 | int error; |
| 229 | |
| 230 | switch (cmd) { |
| 231 | case MODULE_CMD_INIT: |
| 232 | error = syscall_establish(NULL, compat_syscalls); |
| 233 | if (error != 0) { |
| 234 | return error; |
| 235 | } |
| 236 | #ifdef COMPAT_43 |
| 237 | KASSERT(ttcompatvec == NULL); |
| 238 | ttcompatvec = ttcompat; |
| 239 | if_43_init(); |
| 240 | #endif |
| 241 | #ifdef COMPAT_16 |
| 242 | #if defined(COMPAT_SIGCONTEXT) |
| 243 | KASSERT(emul_netbsd.e_sigobject == NULL); |
| 244 | rw_enter(&exec_lock, RW_WRITER); |
| 245 | emul_netbsd.e_sigcode = sigcode; |
| 246 | emul_netbsd.e_esigcode = esigcode; |
| 247 | emul_netbsd.e_sigobject = &emul_netbsd_object; |
| 248 | rw_exit(&exec_lock); |
| 249 | KASSERT(sendsig_sigcontext_vec == NULL); |
| 250 | sendsig_sigcontext_vec = sendsig_sigcontext; |
| 251 | #endif |
| 252 | #endif |
| 253 | compat_sysctl_init(); |
| 254 | return 0; |
| 255 | |
| 256 | case MODULE_CMD_FINI: |
| 257 | #ifdef COMPAT_16 |
| 258 | /* |
| 259 | * Ensure sendsig_sigcontext() is not being used. |
| 260 | * module_lock prevents the flag being set on any |
| 261 | * further processes while we are here. See |
| 262 | * sigaction1() for the opposing half. |
| 263 | */ |
| 264 | mutex_enter(proc_lock); |
| 265 | PROCLIST_FOREACH(p, &allproc) { |
| 266 | if ((p->p_lflag & PL_SIGCOMPAT) != 0) { |
| 267 | break; |
| 268 | } |
| 269 | } |
| 270 | mutex_exit(proc_lock); |
| 271 | if (p != NULL) { |
| 272 | return EBUSY; |
| 273 | } |
| 274 | sendsig_sigcontext_vec = NULL; |
| 275 | #endif |
| 276 | /* Unlink the system calls. */ |
| 277 | error = syscall_disestablish(NULL, compat_syscalls); |
| 278 | if (error != 0) { |
| 279 | return error; |
| 280 | } |
| 281 | #ifdef COMPAT_43 |
| 282 | /* Unlink ttcompatvec. */ |
| 283 | if (rw_tryenter(&ttcompat_lock, RW_WRITER)) { |
| 284 | ttcompatvec = NULL; |
| 285 | rw_exit(&ttcompat_lock); |
| 286 | } else { |
| 287 | error = syscall_establish(NULL, compat_syscalls); |
| 288 | KASSERT(error == 0); |
| 289 | return EBUSY; |
| 290 | } |
| 291 | #endif |
| 292 | #ifdef COMPAT_16 |
| 293 | #if defined(COMPAT_SIGCONTEXT) |
| 294 | /* |
| 295 | * The sigobject may persist if still in use, but |
| 296 | * is reference counted so will die eventually. |
| 297 | */ |
| 298 | rw_enter(&exec_lock, RW_WRITER); |
| 299 | if (emul_netbsd_object != NULL) { |
| 300 | (*emul_netbsd_object->pgops->pgo_detach) |
| 301 | (emul_netbsd_object); |
| 302 | } |
| 303 | emul_netbsd_object = NULL; |
| 304 | emul_netbsd.e_sigcode = NULL; |
| 305 | emul_netbsd.e_esigcode = NULL; |
| 306 | emul_netbsd.e_sigobject = NULL; |
| 307 | rw_exit(&exec_lock); |
| 308 | #endif |
| 309 | #endif /* COMPAT_16 */ |
| 310 | compat_sysctl_fini(); |
| 311 | return 0; |
| 312 | |
| 313 | default: |
| 314 | return ENOTTY; |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | void |
| 319 | compat_sysctl_init(void) |
| 320 | { |
| 321 | |
| 322 | #if defined(COMPAT_09) || defined(COMPAT_43) |
| 323 | compat_sysctl_vfs(&compat_clog); |
| 324 | #endif |
| 325 | #if defined(COMPAT_50) |
| 326 | compat_sysctl_time(&compat_clog); |
| 327 | #endif |
| 328 | } |
| 329 | |
| 330 | void |
| 331 | compat_sysctl_fini(void) |
| 332 | { |
| 333 | |
| 334 | #if defined(COMPAT_09) || defined(COMPAT_43) || defined(COMPAT_50) |
| 335 | sysctl_teardown(&compat_clog); |
| 336 | #endif |
| 337 | #if defined(COMPAT_43) |
| 338 | if_43_fini(); |
| 339 | #endif |
| 340 | } |
| 341 | |