sys/compat/common/compat_mod.c

   1 /*      $NetBSD: compat_mod.c,v 1.9 2009/11/22 19:09:16 mbalmer 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 1.9 2009/11/22 19:09:16 mbalmer 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/sched.h>  /* for cpuset_t */
  53 #include <sys/syscall.h>
  54 #include <sys/syscallargs.h>
  55 #include <sys/syscallvar.h>
  56
  57 #include <uvm/uvm_extern.h>
  58 #include <uvm/uvm_object.h>
  59
  60 #include <compat/common/compat_util.h>
  61
  62 MODULE(MODULE_CLASS_MISC, compat, NULL);
  63
  64 int     ttcompat(struct tty *, u_long, void *, int, struct lwp *);
  65
  66 #ifdef COMPAT_16
  67 extern char sigcode[], esigcode[];
  68 struct uvm_object *emul_netbsd_object;
  69 #endif
  70
  71 extern krwlock_t exec_lock;
  72 extern krwlock_t ttcompat_lock;
  73
  74 static const struct syscall_package compat_syscalls[] = {
  75 #if defined(COMPAT_43)
  76         { SYS_compat_43_fstat43, 0, (sy_call_t *)compat_43_sys_fstat },
  77         { SYS_compat_43_lstat43, 0, (sy_call_t *)compat_43_sys_lstat },
  78         { SYS_compat_43_oaccept, 0, (sy_call_t *)compat_43_sys_accept },
  79         { SYS_compat_43_ocreat, 0, (sy_call_t *)compat_43_sys_creat },
  80         { SYS_compat_43_oftruncate, 0, (sy_call_t *)compat_43_sys_ftruncate },
  81         { SYS_compat_43_ogetdirentries, 0, (sy_call_t *)compat_43_sys_getdirentries },
  82         { SYS_compat_43_ogetdtablesize, 0, (sy_call_t *)compat_43_sys_getdtablesize },
  83         { SYS_compat_43_ogethostid, 0, (sy_call_t *)compat_43_sys_gethostid },
  84         { SYS_compat_43_ogethostname, 0, (sy_call_t *)compat_43_sys_gethostname },
  85         { SYS_compat_43_ogetkerninfo, 0, (sy_call_t *)compat_43_sys_getkerninfo },
  86         { SYS_compat_43_ogetpagesize, 0, (sy_call_t *)compat_43_sys_getpagesize },
  87         { SYS_compat_43_ogetpeername, 0, (sy_call_t *)compat_43_sys_getpeername },
  88         { SYS_compat_43_ogetrlimit, 0, (sy_call_t *)compat_43_sys_getrlimit },
  89         { SYS_compat_43_ogetsockname, 0, (sy_call_t *)compat_43_sys_getsockname },
  90         { SYS_compat_43_okillpg, 0, (sy_call_t *)compat_43_sys_killpg },
  91         { SYS_compat_43_olseek, 0, (sy_call_t *)compat_43_sys_lseek },
  92         { SYS_compat_43_ommap, 0, (sy_call_t *)compat_43_sys_mmap },
  93         { SYS_compat_43_oquota, 0, (sy_call_t *)compat_43_sys_quota },
  94         { SYS_compat_43_orecv, 0, (sy_call_t *)compat_43_sys_recv },
  95         { SYS_compat_43_orecvfrom, 0, (sy_call_t *)compat_43_sys_recvfrom },
  96         { SYS_compat_43_orecvmsg, 0, (sy_call_t *)compat_43_sys_recvmsg },
  97         { SYS_compat_43_osend, 0, (sy_call_t *)compat_43_sys_send },
  98         { SYS_compat_43_osendmsg, 0, (sy_call_t *)compat_43_sys_sendmsg },
  99         { SYS_compat_43_osethostid, 0, (sy_call_t *)compat_43_sys_sethostid },
 100         { SYS_compat_43_osethostname, 0, (sy_call_t *)compat_43_sys_sethostname },
 101         { SYS_compat_43_osetrlimit, 0, (sy_call_t *)compat_43_sys_setrlimit },
 102         { SYS_compat_43_osigblock, 0, (sy_call_t *)compat_43_sys_sigblock },
 103         { SYS_compat_43_osigsetmask, 0, (sy_call_t *)compat_43_sys_sigsetmask },
 104         { SYS_compat_43_osigstack, 0, (sy_call_t *)compat_43_sys_sigstack },
 105         { SYS_compat_43_osigvec, 0, (sy_call_t *)compat_43_sys_sigvec },
 106         { SYS_compat_43_otruncate, 0, (sy_call_t *)compat_43_sys_truncate },
 107         { SYS_compat_43_owait, 0, (sy_call_t *)compat_43_sys_wait },
 108         { SYS_compat_43_stat43, 0, (sy_call_t *)compat_43_sys_stat },
 109 #endif
 110
 111 #if defined(COMPAT_09)
 112         { SYS_compat_09_ogetdomainname, 0, (sy_call_t *)compat_09_sys_getdomainname },
 113         { SYS_compat_09_osetdomainname, 0, (sy_call_t *)compat_09_sys_setdomainname },
 114         { SYS_compat_09_ouname, 0, (sy_call_t *)compat_09_sys_uname },
 115 #endif
 116
 117 #if defined(COMPAT_10) && !defined(_LP64)
 118 # if defined(SYSVMSG)
 119         { SYS_compat_10_omsgsys, 0, (sy_call_t *)compat_10_sys_msgsys },
 120 # endif
 121 # if defined(SYSVSEM)
 122         { SYS_compat_10_osemsys, 0, (sy_call_t *)compat_10_sys_semsys },
 123 # endif
 124 # if defined(SYSVSHM)
 125         { SYS_compat_10_oshmsys, 0, (sy_call_t *)compat_10_sys_shmsys },
 126 # endif
 127 #endif  /* defined(COMPAT_10) && !defined(_LP64) */
 128
 129 #if defined(COMPAT_12)
 130         { SYS_compat_12_fstat12, 0, (sy_call_t *)compat_12_sys_fstat },
 131         { SYS_compat_12_getdirentries, 0, (sy_call_t *)compat_12_sys_getdirentries },
 132         { SYS_compat_12_lstat12, 0, (sy_call_t *)compat_12_sys_lstat },
 133         { SYS_compat_12_msync, 0, (sy_call_t *)compat_12_sys_msync },
 134         { SYS_compat_12_oreboot, 0, (sy_call_t *)compat_12_sys_reboot },
 135         { SYS_compat_12_oswapon, 0, (sy_call_t *)compat_12_sys_swapon },
 136         { SYS_compat_12_stat12, 0, (sy_call_t *)compat_12_sys_stat },
 137 #endif
 138
 139 #if defined(COMPAT_13)
 140         { SYS_compat_13_sigaction13, 0, (sy_call_t *)compat_13_sys_sigaction },
 141         { SYS_compat_13_sigaltstack13, 0, (sy_call_t *)compat_13_sys_sigaltstack },
 142         { SYS_compat_13_sigpending13, 0, (sy_call_t *)compat_13_sys_sigpending },
 143         { SYS_compat_13_sigprocmask13, 0, (sy_call_t *)compat_13_sys_sigprocmask },
 144         { SYS_compat_13_sigreturn13, 0, (sy_call_t *)compat_13_sys_sigreturn },
 145         { SYS_compat_13_sigsuspend13, 0, (sy_call_t *)compat_13_sys_sigsuspend },
 146 #endif
 147
 148 #if defined(COMPAT_14)
 149 # if defined(SYSVSEM)
 150         { SYS_compat_14___semctl, 0, (sy_call_t *)compat_14_sys___semctl },
 151 # endif
 152 # if defined(SYSVMSG)
 153         { SYS_compat_14_msgctl, 0, (sy_call_t *)compat_14_sys_msgctl },
 154 # endif
 155 # if defined(SYSVSHM)
 156         { SYS_compat_14_shmctl, 0, (sy_call_t *)compat_14_sys_shmctl },
 157 # endif
 158 #endif
 159
 160 #if defined(COMPAT_16)
 161         { SYS_compat_16___sigaction14, 0, (sy_call_t *)compat_16_sys___sigaction14 },
 162         { SYS_compat_16___sigreturn14, 0, (sy_call_t *)compat_16_sys___sigreturn14 },
 163 #endif
 164
 165 #if defined(COMPAT_20)
 166         { SYS_compat_20_fhstatfs, 0, (sy_call_t *)compat_20_sys_fhstatfs },
 167         { SYS_compat_20_fstatfs, 0, (sy_call_t *)compat_20_sys_fstatfs },
 168         { SYS_compat_20_getfsstat, 0, (sy_call_t *)compat_20_sys_getfsstat },
 169         { SYS_compat_20_statfs, 0, (sy_call_t *)compat_20_sys_statfs },
 170 #endif
 171
 172 #if defined(COMPAT_30)
 173         { SYS_compat_30___fhstat30, 0, (sy_call_t *)compat_30_sys___fhstat30 },
 174         { SYS_compat_30___fstat13, 0, (sy_call_t *)compat_30_sys___fstat13 },
 175         { SYS_compat_30___lstat13, 0, (sy_call_t *)compat_30_sys___lstat13 },
 176         { SYS_compat_30___stat13, 0, (sy_call_t *)compat_30_sys___stat13 },
 177         { SYS_compat_30_fhopen, 0, (sy_call_t *)compat_30_sys_fhopen },
 178         { SYS_compat_30_fhstat, 0, (sy_call_t *)compat_30_sys_fhstat },
 179         { SYS_compat_30_fhstatvfs1, 0, (sy_call_t *)compat_30_sys_fhstatvfs1 },
 180         { SYS_compat_30_getdents, 0, (sy_call_t *)compat_30_sys_getdents },
 181         { SYS_compat_30_getfh, 0, (sy_call_t *)compat_30_sys_getfh },
 182         { SYS_compat_30_socket, 0, (sy_call_t *)compat_30_sys_socket },
 183 #endif
 184
 185 #if defined(COMPAT_40)
 186         { SYS_compat_40_mount, 0, (sy_call_t *)compat_40_sys_mount },
 187 #endif
 188 #if defined(COMPAT_50)
 189         { SYS_compat_50_wait4, 0, (sy_call_t *)compat_50_sys_wait4 },
 190         { SYS_compat_50_mknod, 0, (sy_call_t *)compat_50_sys_mknod },
 191         { SYS_compat_50_setitimer, 0, (sy_call_t *)compat_50_sys_setitimer },
 192         { SYS_compat_50_getitimer, 0, (sy_call_t *)compat_50_sys_getitimer },
 193         { SYS_compat_50_select, 0, (sy_call_t *)compat_50_sys_select },
 194         { SYS_compat_50_gettimeofday, 0, (sy_call_t *)compat_50_sys_gettimeofday },
 195         { SYS_compat_50_getrusage, 0, (sy_call_t *)compat_50_sys_getrusage },
 196         { SYS_compat_50_settimeofday, 0, (sy_call_t *)compat_50_sys_settimeofday },
 197         { SYS_compat_50_utimes, 0, (sy_call_t *)compat_50_sys_utimes },
 198         { SYS_compat_50_adjtime, 0, (sy_call_t *)compat_50_sys_adjtime },
 199 #ifdef LFS
 200         { SYS_compat_50_lfs_segwait, 0, (sy_call_t *)compat_50_sys_lfs_segwait },
 201 #endif
 202         { SYS_compat_50_futimes, 0, (sy_call_t *)compat_50_sys_futimes },
 203         { SYS_compat_50_clock_gettime, 0, (sy_call_t *)compat_50_sys_clock_gettime },
 204         { SYS_compat_50_clock_settime, 0, (sy_call_t *)compat_50_sys_clock_settime },
 205         { SYS_compat_50_clock_getres, 0, (sy_call_t *)compat_50_sys_clock_getres },
 206         { SYS_compat_50_timer_settime, 0, (sy_call_t *)compat_50_sys_timer_settime },
 207         { SYS_compat_50_timer_gettime, 0, (sy_call_t *)compat_50_sys_timer_gettime },
 208         { SYS_compat_50_nanosleep, 0, (sy_call_t *)compat_50_sys_nanosleep },
 209         { SYS_compat_50___sigtimedwait, 0, (sy_call_t *)compat_50_sys___sigtimedwait },
 210         { SYS_compat_50_mq_timedsend, 0, (sy_call_t *)compat_50_sys_mq_timedsend },
 211         { SYS_compat_50_mq_timedreceive, 0, (sy_call_t *)compat_50_sys_mq_timedreceive },
 212         { SYS_compat_50_lutimes, 0, (sy_call_t *)compat_50_sys_lutimes },
 213 # if defined(SYSVSEM)
 214         { SYS_compat_50_____semctl13, 0, (sy_call_t *)compat_50_sys_____semctl13 },
 215 # endif
 216 # if defined(SYSVMSG)
 217         { SYS_compat_50___msgctl13, 0, (sy_call_t *)compat_50_sys___msgctl13 },
 218 # endif
 219 # if defined(SYSVSHM)
 220         { SYS_compat_50___shmctl13, 0, (sy_call_t *)compat_50_sys___shmctl13 },
 221 # endif
 222         { SYS_compat_50__lwp_park, 0, (sy_call_t *)compat_50_sys__lwp_park },
 223         { SYS_compat_50_kevent, 0, (sy_call_t *)compat_50_sys_kevent },
 224         { SYS_compat_50_pselect, 0, (sy_call_t *)compat_50_sys_pselect },
 225         { SYS_compat_50_pollts, 0, (sy_call_t *)compat_50_sys_pollts },
 226         { SYS_compat_50___stat30, 0, (sy_call_t *)compat_50_sys___stat30 },
 227         { SYS_compat_50___fstat30, 0, (sy_call_t *)compat_50_sys___fstat30 },
 228         { SYS_compat_50___lstat30, 0, (sy_call_t *)compat_50_sys___lstat30 },
 229 # if defined(NTP)
 230         { SYS_compat_50___ntp_gettime30, 0, (sy_call_t *)compat_50_sys___ntp_gettime30 },
 231 # endif
 232         { SYS_compat_50___fhstat40, 0, (sy_call_t *)compat_50_sys___fhstat40 },
 233         { SYS_compat_50_aio_suspend, 0, (sy_call_t *)compat_50_sys_aio_suspend },
 234 #endif
 235         { 0, 0, NULL },
 236 };
 237
 238 static int
 239 compat_modcmd(modcmd_t cmd, void *arg)
 240 {
 241 #ifdef COMPAT_16
 242         proc_t *p;
 243 #endif
 244         int error;
 245
 246         switch (cmd) {
 247         case MODULE_CMD_INIT:
 248                 error = syscall_establish(NULL, compat_syscalls);
 249                 if (error != 0) {
 250                         return error;
 251                 }
 252 #ifdef COMPAT_43
 253                 KASSERT(ttcompatvec == NULL);
 254                 ttcompatvec = ttcompat;
 255 #endif
 256 #ifdef COMPAT_16
 257                 KASSERT(emul_netbsd.e_sigobject == NULL);
 258                 rw_enter(&exec_lock, RW_WRITER);
 259                 emul_netbsd.e_sigcode = sigcode;
 260                 emul_netbsd.e_esigcode = esigcode;
 261                 emul_netbsd.e_sigobject = &emul_netbsd_object;
 262                 rw_exit(&exec_lock);
 263                 KASSERT(sendsig_sigcontext_vec == NULL);
 264                 sendsig_sigcontext_vec = sendsig_sigcontext;
 265 #endif
 266 #if defined(COMPAT_09) || defined(COMPAT_43)
 267                 compat_sysctl_init();
 268 #endif
 269                 return 0;
 270
 271         case MODULE_CMD_FINI:
 272 #ifdef COMPAT_16
 273                 /*
 274                  * Ensure sendsig_sigcontext() is not being used.
 275                  * module_lock prevents the flag being set on any
 276                  * further processes while we are here.  See
 277                  * sigaction1() for the opposing half.
 278                  */
 279                 mutex_enter(proc_lock);
 280                 PROCLIST_FOREACH(p, &allproc) {
 281                         if ((p->p_lflag & PL_SIGCOMPAT) != 0) {
 282                                 break;
 283                         }
 284                 }
 285                 mutex_exit(proc_lock);
 286                 if (p != NULL) {
 287                         return EBUSY;
 288                 }
 289 #endif
 290                 /* Unlink the system calls. */
 291                 error = syscall_disestablish(NULL, compat_syscalls);
 292                 if (error != 0) {
 293                         return error;
 294                 }
 295 #ifdef COMPAT_43
 296                 /* Unlink ttcompatvec. */
 297                 if (rw_tryenter(&ttcompat_lock, RW_WRITER)) {
 298                         ttcompatvec = NULL;
 299                         rw_exit(&ttcompat_lock);
 300                 } else {
 301                         error = syscall_establish(NULL, compat_syscalls);
 302                         KASSERT(error == 0);
 303                         return EBUSY;
 304                 }
 305 #endif
 306 #ifdef COMPAT_16
 307                 /*
 308                  * The sigobject may persist if still in use, but
 309                  * is reference counted so will die eventually.
 310                  */
 311                 rw_enter(&exec_lock, RW_WRITER);
 312                 if (emul_netbsd_object != NULL) {
 313                         (*emul_netbsd_object->pgops->pgo_detach)
 314                             (emul_netbsd_object);
 315                 }
 316                 emul_netbsd_object = NULL;
 317                 emul_netbsd.e_sigcode = NULL;
 318                 emul_netbsd.e_esigcode = NULL;
 319                 emul_netbsd.e_sigobject = NULL;
 320                 rw_exit(&exec_lock);
 321 #endif  /* COMPAT_16 */
 322 #if defined(COMPAT_09) || defined(COMPAT_43)
 323                 compat_sysctl_fini();
 324 #endif
 325                 return 0;
 326
 327         default:
 328                 return ENOTTY;
 329         }
 330 }