1 /* $NetBSD: linux_misc.c,v 1.96 2001/12/09 03:07:43 chs Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998, 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz; by Jason R. Thorpe 9 * of the Numerical Aerospace Simulation Facility, NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Linux compatibility module. Try to deal with various Linux system calls. 42 */ 43 44 /* 45 * These functions have been moved to multiarch to allow 46 * selection of which machines include them to be 47 * determined by the individual files.linux_<arch> files. 48 * 49 * Function in multiarch: 50 * linux_sys_break : linux_break.c 51 * linux_sys_alarm : linux_misc_notalpha.c 52 * linux_sys_getresgid : linux_misc_notalpha.c 53 * linux_sys_nice : linux_misc_notalpha.c 54 * linux_sys_readdir : linux_misc_notalpha.c 55 * linux_sys_setresgid : linux_misc_notalpha.c 56 * linux_sys_time : linux_misc_notalpha.c 57 * linux_sys_utime : linux_misc_notalpha.c 58 * linux_sys_waitpid : linux_misc_notalpha.c 59 * linux_sys_old_mmap : linux_oldmmap.c 60 * linux_sys_oldolduname : linux_oldolduname.c 61 * linux_sys_oldselect : linux_oldselect.c 62 * linux_sys_olduname : linux_olduname.c 63 * linux_sys_pipe : linux_pipe.c 64 */ 65 66 #include <sys/cdefs.h> 67 __KERNEL_RCSID(0, "$NetBSD: linux_misc.c,v 1.96 2001/12/09 03:07:43 chs Exp $"); 68 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/namei.h> 72 #include <sys/proc.h> 73 #include <sys/dirent.h> 74 #include <sys/file.h> 75 #include <sys/stat.h> 76 #include <sys/filedesc.h> 77 #include <sys/ioctl.h> 78 #include <sys/kernel.h> 79 #include <sys/malloc.h> 80 #include <sys/mbuf.h> 81 #include <sys/mman.h> 82 #include <sys/mount.h> 83 #include <sys/reboot.h> 84 #include <sys/resource.h> 85 #include <sys/resourcevar.h> 86 #include <sys/signal.h> 87 #include <sys/signalvar.h> 88 #include <sys/socket.h> 89 #include <sys/time.h> 90 #include <sys/times.h> 91 #include <sys/vnode.h> 92 #include <sys/uio.h> 93 #include <sys/wait.h> 94 #include <sys/utsname.h> 95 #include <sys/unistd.h> 96 #include <sys/swap.h> /* for SWAP_ON */ 97 #include <sys/sysctl.h> /* for KERN_DOMAINNAME */ 98 99 #include <sys/ptrace.h> 100 #include <machine/ptrace.h> 101 102 #include <sys/syscallargs.h> 103 104 #include <compat/linux/common/linux_types.h> 105 #include <compat/linux/common/linux_signal.h> 106 107 #include <compat/linux/linux_syscallargs.h> 108 109 #include <compat/linux/common/linux_fcntl.h> 110 #include <compat/linux/common/linux_mmap.h> 111 #include <compat/linux/common/linux_dirent.h> 112 #include <compat/linux/common/linux_util.h> 113 #include <compat/linux/common/linux_misc.h> 114 #include <compat/linux/common/linux_ptrace.h> 115 #include <compat/linux/common/linux_reboot.h> 116 #include <compat/linux/common/linux_emuldata.h> 117 118 const int linux_ptrace_request_map[] = { 119 LINUX_PTRACE_TRACEME, PT_TRACE_ME, 120 LINUX_PTRACE_PEEKTEXT, PT_READ_I, 121 LINUX_PTRACE_PEEKDATA, PT_READ_D, 122 LINUX_PTRACE_POKETEXT, PT_WRITE_I, 123 LINUX_PTRACE_POKEDATA, PT_WRITE_D, 124 LINUX_PTRACE_CONT, PT_CONTINUE, 125 LINUX_PTRACE_KILL, PT_KILL, 126 LINUX_PTRACE_ATTACH, PT_ATTACH, 127 LINUX_PTRACE_DETACH, PT_DETACH, 128 #ifdef PT_STEP 129 LINUX_PTRACE_SINGLESTEP, PT_STEP, 130 #endif 131 -1 132 }; 133 134 /* Local linux_misc.c functions: */ 135 static void bsd_to_linux_statfs __P((struct statfs *, struct linux_statfs *)); 136 137 /* 138 * The information on a terminated (or stopped) process needs 139 * to be converted in order for Linux binaries to get a valid signal 140 * number out of it. 141 */ 142 void 143 bsd_to_linux_wstat(st) 144 int *st; 145 { 146 147 int sig; 148 149 if (WIFSIGNALED(*st)) { 150 sig = WTERMSIG(*st); 151 if (sig >= 0 && sig < NSIG) 152 *st= (*st& ~0177) | native_to_linux_sig[sig]; 153 } else if (WIFSTOPPED(*st)) { 154 sig = WSTOPSIG(*st); 155 if (sig >= 0 && sig < NSIG) 156 *st = (*st & ~0xff00) | (native_to_linux_sig[sig] << 8); 157 } 158 } 159 160 /* 161 * This is very much the same as waitpid() 162 */ 163 int 164 linux_sys_wait4(p, v, retval) 165 struct proc *p; 166 void *v; 167 register_t *retval; 168 { 169 struct linux_sys_wait4_args /* { 170 syscallarg(int) pid; 171 syscallarg(int *) status; 172 syscallarg(int) options; 173 syscallarg(struct rusage *) rusage; 174 } */ *uap = v; 175 struct sys_wait4_args w4a; 176 int error, *status, tstat, options, linux_options; 177 caddr_t sg; 178 179 if (SCARG(uap, status) != NULL) { 180 sg = stackgap_init(p->p_emul); 181 status = (int *) stackgap_alloc(&sg, sizeof *status); 182 } else 183 status = NULL; 184 185 linux_options = SCARG(uap, options); 186 options = 0; 187 if (linux_options & 188 ~(LINUX_WAIT4_WNOHANG|LINUX_WAIT4_WUNTRACED|LINUX_WAIT4_WALL| 189 LINUX_WAIT4_WCLONE)) 190 return (EINVAL); 191 192 if (linux_options & LINUX_WAIT4_WNOHANG) 193 options |= WNOHANG; 194 if (linux_options & LINUX_WAIT4_WUNTRACED) 195 options |= WUNTRACED; 196 if (linux_options & LINUX_WAIT4_WALL) 197 options |= WALLSIG; 198 if (linux_options & LINUX_WAIT4_WCLONE) 199 options |= WALTSIG; 200 201 SCARG(&w4a, pid) = SCARG(uap, pid); 202 SCARG(&w4a, status) = status; 203 SCARG(&w4a, options) = options; 204 SCARG(&w4a, rusage) = SCARG(uap, rusage); 205 206 if ((error = sys_wait4(p, &w4a, retval))) 207 return error; 208 209 sigdelset(&p->p_sigctx.ps_siglist, SIGCHLD); 210 211 if (status != NULL) { 212 if ((error = copyin(status, &tstat, sizeof tstat))) 213 return error; 214 215 bsd_to_linux_wstat(&tstat); 216 return copyout(&tstat, SCARG(uap, status), sizeof tstat); 217 } 218 219 return 0; 220 } 221 222 /* 223 * Linux brk(2). The check if the new address is >= the old one is 224 * done in the kernel in Linux. NetBSD does it in the library. 225 */ 226 int 227 linux_sys_brk(p, v, retval) 228 struct proc *p; 229 void *v; 230 register_t *retval; 231 { 232 struct linux_sys_brk_args /* { 233 syscallarg(char *) nsize; 234 } */ *uap = v; 235 char *nbrk = SCARG(uap, nsize); 236 struct sys_obreak_args oba; 237 struct vmspace *vm = p->p_vmspace; 238 struct linux_emuldata *ed = (struct linux_emuldata*)p->p_emuldata; 239 240 SCARG(&oba, nsize) = nbrk; 241 242 if ((caddr_t) nbrk > vm->vm_daddr && sys_obreak(p, &oba, retval) == 0) 243 ed->p_break = (char*)nbrk; 244 else 245 nbrk = ed->p_break; 246 247 retval[0] = (register_t)nbrk; 248 249 return 0; 250 } 251 252 /* 253 * Convert BSD statfs structure to Linux statfs structure. 254 * The Linux structure has less fields, and it also wants 255 * the length of a name in a dir entry in a field, which 256 * we fake (probably the wrong way). 257 */ 258 static void 259 bsd_to_linux_statfs(bsp, lsp) 260 struct statfs *bsp; 261 struct linux_statfs *lsp; 262 { 263 264 lsp->l_ftype = bsp->f_type; 265 lsp->l_fbsize = bsp->f_bsize; 266 lsp->l_fblocks = bsp->f_blocks; 267 lsp->l_fbfree = bsp->f_bfree; 268 lsp->l_fbavail = bsp->f_bavail; 269 lsp->l_ffiles = bsp->f_files; 270 lsp->l_fffree = bsp->f_ffree; 271 lsp->l_ffsid.val[0] = bsp->f_fsid.val[0]; 272 lsp->l_ffsid.val[1] = bsp->f_fsid.val[1]; 273 lsp->l_fnamelen = MAXNAMLEN; /* XXX */ 274 } 275 276 /* 277 * Implement the fs stat functions. Straightforward. 278 */ 279 int 280 linux_sys_statfs(p, v, retval) 281 struct proc *p; 282 void *v; 283 register_t *retval; 284 { 285 struct linux_sys_statfs_args /* { 286 syscallarg(const char *) path; 287 syscallarg(struct linux_statfs *) sp; 288 } */ *uap = v; 289 struct statfs btmp, *bsp; 290 struct linux_statfs ltmp; 291 struct sys_statfs_args bsa; 292 caddr_t sg; 293 int error; 294 295 sg = stackgap_init(p->p_emul); 296 bsp = (struct statfs *) stackgap_alloc(&sg, sizeof (struct statfs)); 297 298 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 299 300 SCARG(&bsa, path) = SCARG(uap, path); 301 SCARG(&bsa, buf) = bsp; 302 303 if ((error = sys_statfs(p, &bsa, retval))) 304 return error; 305 306 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 307 return error; 308 309 bsd_to_linux_statfs(&btmp, <mp); 310 311 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 312 } 313 314 int 315 linux_sys_fstatfs(p, v, retval) 316 struct proc *p; 317 void *v; 318 register_t *retval; 319 { 320 struct linux_sys_fstatfs_args /* { 321 syscallarg(int) fd; 322 syscallarg(struct linux_statfs *) sp; 323 } */ *uap = v; 324 struct statfs btmp, *bsp; 325 struct linux_statfs ltmp; 326 struct sys_fstatfs_args bsa; 327 caddr_t sg; 328 int error; 329 330 sg = stackgap_init(p->p_emul); 331 bsp = (struct statfs *) stackgap_alloc(&sg, sizeof (struct statfs)); 332 333 SCARG(&bsa, fd) = SCARG(uap, fd); 334 SCARG(&bsa, buf) = bsp; 335 336 if ((error = sys_fstatfs(p, &bsa, retval))) 337 return error; 338 339 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 340 return error; 341 342 bsd_to_linux_statfs(&btmp, <mp); 343 344 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 345 } 346 347 char linux_sysname[] = "Linux"; 348 char linux_release[] = "2.0.38"; 349 char linux_version[] = "#0 Sun Apr 1 11:11:11 MET 2000"; 350 351 /* 352 * uname(). Just copy the info from the various strings stored in the 353 * kernel, and put it in the Linux utsname structure. That structure 354 * is almost the same as the NetBSD one, only it has fields 65 characters 355 * long, and an extra domainname field. 356 */ 357 int 358 linux_sys_uname(p, v, retval) 359 struct proc *p; 360 void *v; 361 register_t *retval; 362 { 363 struct linux_sys_uname_args /* { 364 syscallarg(struct linux_utsname *) up; 365 } */ *uap = v; 366 struct linux_utsname luts; 367 368 strncpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 369 strncpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 370 strncpy(luts.l_release, linux_release, sizeof(luts.l_release)); 371 strncpy(luts.l_version, linux_version, sizeof(luts.l_version)); 372 strncpy(luts.l_machine, machine, sizeof(luts.l_machine)); 373 strncpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 374 375 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 376 } 377 378 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 379 /* Used indirectly on: arm, i386, m68k */ 380 381 /* 382 * New type Linux mmap call. 383 * Only called directly on machines with >= 6 free regs. 384 */ 385 int 386 linux_sys_mmap(p, v, retval) 387 struct proc *p; 388 void *v; 389 register_t *retval; 390 { 391 struct linux_sys_mmap_args /* { 392 syscallarg(unsigned long) addr; 393 syscallarg(size_t) len; 394 syscallarg(int) prot; 395 syscallarg(int) flags; 396 syscallarg(int) fd; 397 syscallarg(linux_off_t) offset; 398 } */ *uap = v; 399 struct sys_mmap_args cma; 400 int flags; 401 402 flags = 0; 403 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_SHARED, MAP_SHARED); 404 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_PRIVATE, MAP_PRIVATE); 405 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_FIXED, MAP_FIXED); 406 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_ANON, MAP_ANON); 407 /* XXX XAX ERH: Any other flags here? There are more defined... */ 408 409 SCARG(&cma,addr) = (void *)SCARG(uap, addr); 410 SCARG(&cma,len) = SCARG(uap, len); 411 SCARG(&cma,prot) = SCARG(uap, prot); 412 if (SCARG(&cma,prot) & VM_PROT_WRITE) /* XXX */ 413 SCARG(&cma,prot) |= VM_PROT_READ; 414 SCARG(&cma,flags) = flags; 415 SCARG(&cma,fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 416 SCARG(&cma,pad) = 0; 417 SCARG(&cma,pos) = (off_t)SCARG(uap, offset); 418 419 return sys_mmap(p, &cma, retval); 420 } 421 422 int 423 linux_sys_mremap(p, v, retval) 424 struct proc *p; 425 void *v; 426 register_t *retval; 427 { 428 struct linux_sys_mremap_args /* { 429 syscallarg(void *) old_address; 430 syscallarg(size_t) old_size; 431 syscallarg(size_t) new_size; 432 syscallarg(u_long) flags; 433 } */ *uap = v; 434 struct sys_munmap_args mua; 435 size_t old_size, new_size; 436 int error; 437 438 old_size = round_page(SCARG(uap, old_size)); 439 new_size = round_page(SCARG(uap, new_size)); 440 441 /* 442 * Growing mapped region. 443 */ 444 if (new_size > old_size) { 445 /* 446 * XXX Implement me. What we probably want to do is 447 * XXX dig out the guts of the old mapping, mmap that 448 * XXX object again with the new size, then munmap 449 * XXX the old mapping. 450 */ 451 *retval = 0; 452 return (ENOMEM); 453 } 454 455 /* 456 * Shrinking mapped region. 457 */ 458 if (new_size < old_size) { 459 SCARG(&mua, addr) = (caddr_t)SCARG(uap, old_address) + 460 new_size; 461 SCARG(&mua, len) = old_size - new_size; 462 error = sys_munmap(p, &mua, retval); 463 *retval = error ? 0 : (register_t)SCARG(uap, old_address); 464 return (error); 465 } 466 467 /* 468 * No change. 469 */ 470 *retval = (register_t)SCARG(uap, old_address); 471 return (0); 472 } 473 474 int 475 linux_sys_msync(p, v, retval) 476 struct proc *p; 477 void *v; 478 register_t *retval; 479 { 480 struct linux_sys_msync_args /* { 481 syscallarg(caddr_t) addr; 482 syscallarg(int) len; 483 syscallarg(int) fl; 484 } */ *uap = v; 485 486 struct sys___msync13_args bma; 487 488 /* flags are ignored */ 489 SCARG(&bma, addr) = SCARG(uap, addr); 490 SCARG(&bma, len) = SCARG(uap, len); 491 SCARG(&bma, flags) = SCARG(uap, fl); 492 493 return sys___msync13(p, &bma, retval); 494 } 495 496 /* 497 * This code is partly stolen from src/lib/libc/compat-43/times.c 498 * XXX - CLK_TCK isn't declared in /sys, just in <time.h>, done here 499 */ 500 501 #define CLK_TCK 100 502 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 503 504 int 505 linux_sys_times(p, v, retval) 506 struct proc *p; 507 void *v; 508 register_t *retval; 509 { 510 struct linux_sys_times_args /* { 511 syscallarg(struct times *) tms; 512 } */ *uap = v; 513 struct timeval t; 514 struct linux_tms ltms; 515 struct rusage ru; 516 int error, s; 517 518 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL); 519 ltms.ltms_utime = CONVTCK(ru.ru_utime); 520 ltms.ltms_stime = CONVTCK(ru.ru_stime); 521 522 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 523 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 524 525 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 526 return error; 527 528 s = splclock(); 529 timersub(&time, &boottime, &t); 530 splx(s); 531 532 retval[0] = ((linux_clock_t)(CONVTCK(t))); 533 return 0; 534 } 535 536 /* 537 * Linux 'readdir' call. This code is mostly taken from the 538 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 539 * an attempt has been made to keep it a little cleaner (failing 540 * miserably, because of the cruft needed if count 1 is passed). 541 * 542 * The d_off field should contain the offset of the next valid entry, 543 * but in Linux it has the offset of the entry itself. We emulate 544 * that bug here. 545 * 546 * Read in BSD-style entries, convert them, and copy them out. 547 * 548 * Note that this doesn't handle union-mounted filesystems. 549 */ 550 int 551 linux_sys_getdents(p, v, retval) 552 struct proc *p; 553 void *v; 554 register_t *retval; 555 { 556 struct linux_sys_getdents_args /* { 557 syscallarg(int) fd; 558 syscallarg(struct linux_dirent *) dent; 559 syscallarg(unsigned int) count; 560 } */ *uap = v; 561 struct dirent *bdp; 562 struct vnode *vp; 563 caddr_t inp, buf; /* BSD-format */ 564 int len, reclen; /* BSD-format */ 565 caddr_t outp; /* Linux-format */ 566 int resid, linux_reclen = 0; /* Linux-format */ 567 struct file *fp; 568 struct uio auio; 569 struct iovec aiov; 570 struct linux_dirent idb; 571 off_t off; /* true file offset */ 572 int buflen, error, eofflag, nbytes, oldcall; 573 struct vattr va; 574 off_t *cookiebuf = NULL, *cookie; 575 int ncookies; 576 577 /* getvnode() will use the descriptor for us */ 578 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 579 return (error); 580 581 if ((fp->f_flag & FREAD) == 0) { 582 error = EBADF; 583 goto out1; 584 } 585 586 vp = (struct vnode *)fp->f_data; 587 if (vp->v_type != VDIR) { 588 error = EINVAL; 589 goto out1; 590 } 591 592 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) 593 goto out1; 594 595 nbytes = SCARG(uap, count); 596 if (nbytes == 1) { /* emulating old, broken behaviour */ 597 nbytes = sizeof (struct linux_dirent); 598 buflen = max(va.va_blocksize, nbytes); 599 oldcall = 1; 600 } else { 601 buflen = min(MAXBSIZE, nbytes); 602 if (buflen < va.va_blocksize) 603 buflen = va.va_blocksize; 604 oldcall = 0; 605 } 606 buf = malloc(buflen, M_TEMP, M_WAITOK); 607 608 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 609 off = fp->f_offset; 610 again: 611 aiov.iov_base = buf; 612 aiov.iov_len = buflen; 613 auio.uio_iov = &aiov; 614 auio.uio_iovcnt = 1; 615 auio.uio_rw = UIO_READ; 616 auio.uio_segflg = UIO_SYSSPACE; 617 auio.uio_procp = p; 618 auio.uio_resid = buflen; 619 auio.uio_offset = off; 620 /* 621 * First we read into the malloc'ed buffer, then 622 * we massage it into user space, one record at a time. 623 */ 624 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 625 &ncookies); 626 if (error) 627 goto out; 628 629 inp = buf; 630 outp = (caddr_t)SCARG(uap, dent); 631 resid = nbytes; 632 if ((len = buflen - auio.uio_resid) == 0) 633 goto eof; 634 635 for (cookie = cookiebuf; len > 0; len -= reclen) { 636 bdp = (struct dirent *)inp; 637 reclen = bdp->d_reclen; 638 if (reclen & 3) 639 panic("linux_readdir"); 640 if (bdp->d_fileno == 0) { 641 inp += reclen; /* it is a hole; squish it out */ 642 off = *cookie++; 643 continue; 644 } 645 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 646 if (reclen > len || resid < linux_reclen) { 647 /* entry too big for buffer, so just stop */ 648 outp++; 649 break; 650 } 651 /* 652 * Massage in place to make a Linux-shaped dirent (otherwise 653 * we have to worry about touching user memory outside of 654 * the copyout() call). 655 */ 656 idb.d_ino = (linux_ino_t)bdp->d_fileno; 657 /* 658 * The old readdir() call misuses the offset and reclen fields. 659 */ 660 if (oldcall) { 661 idb.d_off = (linux_off_t)linux_reclen; 662 idb.d_reclen = (u_short)bdp->d_namlen; 663 } else { 664 if (sizeof (linux_off_t) < 4 && (off >> 32) != 0) { 665 compat_offseterr(vp, "linux_getdents"); 666 error = EINVAL; 667 goto out; 668 } 669 idb.d_off = (linux_off_t)off; 670 idb.d_reclen = (u_short)linux_reclen; 671 } 672 strcpy(idb.d_name, bdp->d_name); 673 if ((error = copyout((caddr_t)&idb, outp, linux_reclen))) 674 goto out; 675 /* advance past this real entry */ 676 inp += reclen; 677 off = *cookie++; /* each entry points to itself */ 678 /* advance output past Linux-shaped entry */ 679 outp += linux_reclen; 680 resid -= linux_reclen; 681 if (oldcall) 682 break; 683 } 684 685 /* if we squished out the whole block, try again */ 686 if (outp == (caddr_t)SCARG(uap, dent)) 687 goto again; 688 fp->f_offset = off; /* update the vnode offset */ 689 690 if (oldcall) 691 nbytes = resid + linux_reclen; 692 693 eof: 694 *retval = nbytes - resid; 695 out: 696 VOP_UNLOCK(vp, 0); 697 if (cookiebuf) 698 free(cookiebuf, M_TEMP); 699 free(buf, M_TEMP); 700 out1: 701 FILE_UNUSE(fp, p); 702 return error; 703 } 704 705 /* 706 * Even when just using registers to pass arguments to syscalls you can 707 * have 5 of them on the i386. So this newer version of select() does 708 * this. 709 */ 710 int 711 linux_sys_select(p, v, retval) 712 struct proc *p; 713 void *v; 714 register_t *retval; 715 { 716 struct linux_sys_select_args /* { 717 syscallarg(int) nfds; 718 syscallarg(fd_set *) readfds; 719 syscallarg(fd_set *) writefds; 720 syscallarg(fd_set *) exceptfds; 721 syscallarg(struct timeval *) timeout; 722 } */ *uap = v; 723 724 return linux_select1(p, retval, SCARG(uap, nfds), SCARG(uap, readfds), 725 SCARG(uap, writefds), SCARG(uap, exceptfds), SCARG(uap, timeout)); 726 } 727 728 /* 729 * Common code for the old and new versions of select(). A couple of 730 * things are important: 731 * 1) return the amount of time left in the 'timeout' parameter 732 * 2) select never returns ERESTART on Linux, always return EINTR 733 */ 734 int 735 linux_select1(p, retval, nfds, readfds, writefds, exceptfds, timeout) 736 struct proc *p; 737 register_t *retval; 738 int nfds; 739 fd_set *readfds, *writefds, *exceptfds; 740 struct timeval *timeout; 741 { 742 struct sys_select_args bsa; 743 struct timeval tv0, tv1, utv, *tvp; 744 caddr_t sg; 745 int error; 746 747 SCARG(&bsa, nd) = nfds; 748 SCARG(&bsa, in) = readfds; 749 SCARG(&bsa, ou) = writefds; 750 SCARG(&bsa, ex) = exceptfds; 751 SCARG(&bsa, tv) = timeout; 752 753 /* 754 * Store current time for computation of the amount of 755 * time left. 756 */ 757 if (timeout) { 758 if ((error = copyin(timeout, &utv, sizeof(utv)))) 759 return error; 760 if (itimerfix(&utv)) { 761 /* 762 * The timeval was invalid. Convert it to something 763 * valid that will act as it does under Linux. 764 */ 765 sg = stackgap_init(p->p_emul); 766 tvp = stackgap_alloc(&sg, sizeof(utv)); 767 utv.tv_sec += utv.tv_usec / 1000000; 768 utv.tv_usec %= 1000000; 769 if (utv.tv_usec < 0) { 770 utv.tv_sec -= 1; 771 utv.tv_usec += 1000000; 772 } 773 if (utv.tv_sec < 0) 774 timerclear(&utv); 775 if ((error = copyout(&utv, tvp, sizeof(utv)))) 776 return error; 777 SCARG(&bsa, tv) = tvp; 778 } 779 microtime(&tv0); 780 } 781 782 error = sys_select(p, &bsa, retval); 783 if (error) { 784 /* 785 * See fs/select.c in the Linux kernel. Without this, 786 * Maelstrom doesn't work. 787 */ 788 if (error == ERESTART) 789 error = EINTR; 790 return error; 791 } 792 793 if (timeout) { 794 if (*retval) { 795 /* 796 * Compute how much time was left of the timeout, 797 * by subtracting the current time and the time 798 * before we started the call, and subtracting 799 * that result from the user-supplied value. 800 */ 801 microtime(&tv1); 802 timersub(&tv1, &tv0, &tv1); 803 timersub(&utv, &tv1, &utv); 804 if (utv.tv_sec < 0) 805 timerclear(&utv); 806 } else 807 timerclear(&utv); 808 if ((error = copyout(&utv, timeout, sizeof(utv)))) 809 return error; 810 } 811 812 return 0; 813 } 814 815 /* 816 * Get the process group of a certain process. Look it up 817 * and return the value. 818 */ 819 int 820 linux_sys_getpgid(p, v, retval) 821 struct proc *p; 822 void *v; 823 register_t *retval; 824 { 825 struct linux_sys_getpgid_args /* { 826 syscallarg(int) pid; 827 } */ *uap = v; 828 struct proc *targp; 829 830 if (SCARG(uap, pid) != 0 && SCARG(uap, pid) != p->p_pid) { 831 if ((targp = pfind(SCARG(uap, pid))) == 0) 832 return ESRCH; 833 } 834 else 835 targp = p; 836 837 retval[0] = targp->p_pgid; 838 return 0; 839 } 840 841 /* 842 * Set the 'personality' (emulation mode) for the current process. Only 843 * accept the Linux personality here (0). This call is needed because 844 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 845 * ELF binaries run in Linux mode, not SVR4 mode. 846 */ 847 int 848 linux_sys_personality(p, v, retval) 849 struct proc *p; 850 void *v; 851 register_t *retval; 852 { 853 struct linux_sys_personality_args /* { 854 syscallarg(int) per; 855 } */ *uap = v; 856 857 if (SCARG(uap, per) != 0) 858 return EINVAL; 859 retval[0] = 0; 860 return 0; 861 } 862 863 #if defined(__i386__) || defined(__m68k__) 864 /* 865 * The calls are here because of type conversions. 866 */ 867 int 868 linux_sys_setreuid16(p, v, retval) 869 struct proc *p; 870 void *v; 871 register_t *retval; 872 { 873 struct linux_sys_setreuid16_args /* { 874 syscallarg(int) ruid; 875 syscallarg(int) euid; 876 } */ *uap = v; 877 struct sys_setreuid_args bsa; 878 879 SCARG(&bsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 880 (uid_t)-1 : SCARG(uap, ruid); 881 SCARG(&bsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 882 (uid_t)-1 : SCARG(uap, euid); 883 884 return sys_setreuid(p, &bsa, retval); 885 } 886 887 int 888 linux_sys_setregid16(p, v, retval) 889 struct proc *p; 890 void *v; 891 register_t *retval; 892 { 893 struct linux_sys_setregid16_args /* { 894 syscallarg(int) rgid; 895 syscallarg(int) egid; 896 } */ *uap = v; 897 struct sys_setregid_args bsa; 898 899 SCARG(&bsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 900 (uid_t)-1 : SCARG(uap, rgid); 901 SCARG(&bsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 902 (uid_t)-1 : SCARG(uap, egid); 903 904 return sys_setregid(p, &bsa, retval); 905 } 906 907 int 908 linux_sys_setresuid16(p, v, retval) 909 struct proc *p; 910 void *v; 911 register_t *retval; 912 { 913 struct linux_sys_setresuid16_args /* { 914 syscallarg(uid_t) ruid; 915 syscallarg(uid_t) euid; 916 syscallarg(uid_t) suid; 917 } */ *uap = v; 918 struct linux_sys_setresuid16_args lsa; 919 920 SCARG(&lsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 921 (uid_t)-1 : SCARG(uap, ruid); 922 SCARG(&lsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 923 (uid_t)-1 : SCARG(uap, euid); 924 SCARG(&lsa, suid) = ((linux_uid_t)SCARG(uap, suid) == (linux_uid_t)-1) ? 925 (uid_t)-1 : SCARG(uap, suid); 926 927 return linux_sys_setresuid(p, &lsa, retval); 928 } 929 930 int 931 linux_sys_setresgid16(p, v, retval) 932 struct proc *p; 933 void *v; 934 register_t *retval; 935 { 936 struct linux_sys_setresgid16_args /* { 937 syscallarg(gid_t) rgid; 938 syscallarg(gid_t) egid; 939 syscallarg(gid_t) sgid; 940 } */ *uap = v; 941 struct linux_sys_setresgid16_args lsa; 942 943 SCARG(&lsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 944 (gid_t)-1 : SCARG(uap, rgid); 945 SCARG(&lsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 946 (gid_t)-1 : SCARG(uap, egid); 947 SCARG(&lsa, sgid) = ((linux_gid_t)SCARG(uap, sgid) == (linux_gid_t)-1) ? 948 (gid_t)-1 : SCARG(uap, sgid); 949 950 return linux_sys_setresgid(p, &lsa, retval); 951 } 952 953 int 954 linux_sys_getgroups16(p, v, retval) 955 struct proc *p; 956 void *v; 957 register_t *retval; 958 { 959 struct linux_sys_getgroups16_args /* { 960 syscallarg(int) gidsetsize; 961 syscallarg(linux_gid_t *) gidset; 962 } */ *uap = v; 963 caddr_t sg; 964 int n, error, i; 965 struct sys_getgroups_args bsa; 966 gid_t *bset, *kbset; 967 linux_gid_t *lset; 968 struct pcred *pc = p->p_cred; 969 970 n = SCARG(uap, gidsetsize); 971 if (n < 0) 972 return EINVAL; 973 error = 0; 974 bset = kbset = NULL; 975 lset = NULL; 976 if (n > 0) { 977 n = min(pc->pc_ucred->cr_ngroups, n); 978 sg = stackgap_init(p->p_emul); 979 bset = stackgap_alloc(&sg, n * sizeof (gid_t)); 980 kbset = malloc(n * sizeof (gid_t), M_TEMP, M_WAITOK); 981 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 982 if (bset == NULL || kbset == NULL || lset == NULL) 983 return ENOMEM; 984 SCARG(&bsa, gidsetsize) = n; 985 SCARG(&bsa, gidset) = bset; 986 error = sys_getgroups(p, &bsa, retval); 987 if (error != 0) 988 goto out; 989 error = copyin(bset, kbset, n * sizeof (gid_t)); 990 if (error != 0) 991 goto out; 992 for (i = 0; i < n; i++) 993 lset[i] = (linux_gid_t)kbset[i]; 994 error = copyout(lset, SCARG(uap, gidset), 995 n * sizeof (linux_gid_t)); 996 } else 997 *retval = pc->pc_ucred->cr_ngroups; 998 out: 999 if (kbset != NULL) 1000 free(kbset, M_TEMP); 1001 if (lset != NULL) 1002 free(lset, M_TEMP); 1003 return error; 1004 } 1005 1006 int 1007 linux_sys_setgroups16(p, v, retval) 1008 struct proc *p; 1009 void *v; 1010 register_t *retval; 1011 { 1012 struct linux_sys_setgroups16_args /* { 1013 syscallarg(int) gidsetsize; 1014 syscallarg(linux_gid_t *) gidset; 1015 } */ *uap = v; 1016 caddr_t sg; 1017 int n; 1018 int error, i; 1019 struct sys_setgroups_args bsa; 1020 gid_t *bset, *kbset; 1021 linux_gid_t *lset; 1022 1023 n = SCARG(uap, gidsetsize); 1024 if (n < 0 || n > NGROUPS) 1025 return EINVAL; 1026 sg = stackgap_init(p->p_emul); 1027 bset = stackgap_alloc(&sg, n * sizeof (gid_t)); 1028 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1029 kbset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1030 if (lset == NULL || bset == NULL) 1031 return ENOMEM; 1032 error = copyin(SCARG(uap, gidset), lset, n * sizeof (linux_gid_t)); 1033 if (error != 0) 1034 goto out; 1035 for (i = 0; i < n; i++) 1036 kbset[i] = (gid_t)lset[i]; 1037 error = copyout(kbset, bset, n * sizeof (gid_t)); 1038 if (error != 0) 1039 goto out; 1040 SCARG(&bsa, gidsetsize) = n; 1041 SCARG(&bsa, gidset) = bset; 1042 error = sys_setgroups(p, &bsa, retval); 1043 1044 out: 1045 if (lset != NULL) 1046 free(lset, M_TEMP); 1047 if (kbset != NULL) 1048 free(kbset, M_TEMP); 1049 1050 return error; 1051 } 1052 1053 #endif /* __i386__ || __m68k__ */ 1054 1055 /* 1056 * We have nonexistent fsuid equal to uid. 1057 * If modification is requested, refuse. 1058 */ 1059 int 1060 linux_sys_setfsuid(p, v, retval) 1061 struct proc *p; 1062 void *v; 1063 register_t *retval; 1064 { 1065 struct linux_sys_setfsuid_args /* { 1066 syscallarg(uid_t) uid; 1067 } */ *uap = v; 1068 uid_t uid; 1069 1070 uid = SCARG(uap, uid); 1071 if (p->p_cred->p_ruid != uid) 1072 return sys_nosys(p, v, retval); 1073 else 1074 return (0); 1075 } 1076 1077 /* XXX XXX XXX */ 1078 #ifndef alpha 1079 int 1080 linux_sys_getfsuid(p, v, retval) 1081 struct proc *p; 1082 void *v; 1083 register_t *retval; 1084 { 1085 return sys_getuid(p, v, retval); 1086 } 1087 #endif 1088 1089 int 1090 linux_sys___sysctl(p, v, retval) 1091 struct proc *p; 1092 void *v; 1093 register_t *retval; 1094 { 1095 struct linux_sys___sysctl_args /* { 1096 syscallarg(struct linux___sysctl *) lsp; 1097 } */ *uap = v; 1098 struct linux___sysctl ls; 1099 struct sys___sysctl_args bsa; 1100 int error; 1101 1102 if ((error = copyin(SCARG(uap, lsp), &ls, sizeof ls))) 1103 return error; 1104 SCARG(&bsa, name) = ls.name; 1105 SCARG(&bsa, namelen) = ls.namelen; 1106 SCARG(&bsa, old) = ls.old; 1107 SCARG(&bsa, oldlenp) = ls.oldlenp; 1108 SCARG(&bsa, new) = ls.new; 1109 SCARG(&bsa, newlen) = ls.newlen; 1110 1111 return sys___sysctl(p, &bsa, retval); 1112 } 1113 1114 int 1115 linux_sys_setresuid(p, v, retval) 1116 struct proc *p; 1117 void *v; 1118 register_t *retval; 1119 { 1120 struct linux_sys_setresuid_args /* { 1121 syscallarg(uid_t) ruid; 1122 syscallarg(uid_t) euid; 1123 syscallarg(uid_t) suid; 1124 } */ *uap = v; 1125 struct pcred *pc = p->p_cred; 1126 uid_t ruid, euid, suid; 1127 int error; 1128 1129 ruid = SCARG(uap, ruid); 1130 euid = SCARG(uap, euid); 1131 suid = SCARG(uap, suid); 1132 1133 /* 1134 * Note: These checks are a little different than the NetBSD 1135 * setreuid(2) call performs. This precisely follows the 1136 * behavior of the Linux kernel. 1137 */ 1138 if (ruid != (uid_t)-1 && 1139 ruid != pc->p_ruid && 1140 ruid != pc->pc_ucred->cr_uid && 1141 ruid != pc->p_svuid && 1142 (error = suser(pc->pc_ucred, &p->p_acflag))) 1143 return (error); 1144 1145 if (euid != (uid_t)-1 && 1146 euid != pc->p_ruid && 1147 euid != pc->pc_ucred->cr_uid && 1148 euid != pc->p_svuid && 1149 (error = suser(pc->pc_ucred, &p->p_acflag))) 1150 return (error); 1151 1152 if (suid != (uid_t)-1 && 1153 suid != pc->p_ruid && 1154 suid != pc->pc_ucred->cr_uid && 1155 suid != pc->p_svuid && 1156 (error = suser(pc->pc_ucred, &p->p_acflag))) 1157 return (error); 1158 1159 /* 1160 * Now assign the new real, effective, and saved UIDs. 1161 * Note that Linux, unlike NetBSD in setreuid(2), does not 1162 * set the saved UID in this call unless the user specifies 1163 * it. 1164 */ 1165 if (ruid != (uid_t)-1) { 1166 (void)chgproccnt(pc->p_ruid, -1); 1167 (void)chgproccnt(ruid, 1); 1168 pc->p_ruid = ruid; 1169 } 1170 1171 if (euid != (uid_t)-1) { 1172 pc->pc_ucred = crcopy(pc->pc_ucred); 1173 pc->pc_ucred->cr_uid = euid; 1174 } 1175 1176 if (suid != (uid_t)-1) 1177 pc->p_svuid = suid; 1178 1179 if (ruid != (uid_t)-1 && euid != (uid_t)-1 && suid != (uid_t)-1) 1180 p->p_flag |= P_SUGID; 1181 return (0); 1182 } 1183 1184 int 1185 linux_sys_getresuid(p, v, retval) 1186 struct proc *p; 1187 void *v; 1188 register_t *retval; 1189 { 1190 struct linux_sys_getresuid_args /* { 1191 syscallarg(uid_t *) ruid; 1192 syscallarg(uid_t *) euid; 1193 syscallarg(uid_t *) suid; 1194 } */ *uap = v; 1195 struct pcred *pc = p->p_cred; 1196 int error; 1197 1198 /* 1199 * Linux copies these values out to userspace like so: 1200 * 1201 * 1. Copy out ruid. 1202 * 2. If that succeeds, copy out euid. 1203 * 3. If both of those succeed, copy out suid. 1204 */ 1205 if ((error = copyout(&pc->p_ruid, SCARG(uap, ruid), 1206 sizeof(uid_t))) != 0) 1207 return (error); 1208 1209 if ((error = copyout(&pc->pc_ucred->cr_uid, SCARG(uap, euid), 1210 sizeof(uid_t))) != 0) 1211 return (error); 1212 1213 return (copyout(&pc->p_svuid, SCARG(uap, suid), sizeof(uid_t))); 1214 } 1215 1216 int 1217 linux_sys_ptrace(p, v, retval) 1218 struct proc *p; 1219 void *v; 1220 register_t *retval; 1221 { 1222 struct linux_sys_ptrace_args /* { 1223 i386, m68k, powerpc: T=int 1224 alpha: T=long 1225 syscallarg(T) request; 1226 syscallarg(T) pid; 1227 syscallarg(T) addr; 1228 syscallarg(T) data; 1229 } */ *uap = v; 1230 const int *ptr; 1231 int request; 1232 int error; 1233 1234 ptr = linux_ptrace_request_map; 1235 request = SCARG(uap, request); 1236 while (*ptr != -1) 1237 if (*ptr++ == request) { 1238 struct sys_ptrace_args pta; 1239 1240 SCARG(&pta, req) = *ptr; 1241 SCARG(&pta, pid) = SCARG(uap, pid); 1242 SCARG(&pta, addr) = (caddr_t)SCARG(uap, addr); 1243 SCARG(&pta, data) = SCARG(uap, data); 1244 1245 /* 1246 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1247 * to continue where the process left off previously. 1248 * The same thing is achieved by addr == (caddr_t) 1 1249 * on NetBSD, so rewrite 'addr' appropriately. 1250 */ 1251 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1252 SCARG(&pta, addr) = (caddr_t) 1; 1253 1254 error = sys_ptrace(p, &pta, retval); 1255 if (error) 1256 return error; 1257 switch (request) { 1258 case LINUX_PTRACE_PEEKTEXT: 1259 case LINUX_PTRACE_PEEKDATA: 1260 error = copyout (retval, 1261 (caddr_t)SCARG(uap, data), sizeof *retval); 1262 *retval = SCARG(uap, data); 1263 break; 1264 default: 1265 break; 1266 } 1267 return error; 1268 } 1269 else 1270 ptr++; 1271 1272 return LINUX_SYS_PTRACE_ARCH(p, uap, retval); 1273 } 1274 1275 int 1276 linux_sys_reboot(struct proc *p, void *v, register_t *retval) 1277 { 1278 struct linux_sys_reboot_args /* { 1279 syscallarg(int) magic1; 1280 syscallarg(int) magic2; 1281 syscallarg(int) cmd; 1282 syscallarg(void *) arg; 1283 } */ *uap = v; 1284 struct sys_reboot_args /* { 1285 syscallarg(int) opt; 1286 syscallarg(char *) bootstr; 1287 } */ sra; 1288 int error; 1289 1290 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1291 return(error); 1292 1293 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1294 return(EINVAL); 1295 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1296 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1297 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1298 return(EINVAL); 1299 1300 switch (SCARG(uap, cmd)) { 1301 case LINUX_REBOOT_CMD_RESTART: 1302 SCARG(&sra, opt) = RB_AUTOBOOT; 1303 break; 1304 case LINUX_REBOOT_CMD_HALT: 1305 SCARG(&sra, opt) = RB_HALT; 1306 break; 1307 case LINUX_REBOOT_CMD_POWER_OFF: 1308 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1309 break; 1310 case LINUX_REBOOT_CMD_RESTART2: 1311 /* Reboot with an argument. */ 1312 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1313 SCARG(&sra, bootstr) = SCARG(uap, arg); 1314 break; 1315 case LINUX_REBOOT_CMD_CAD_ON: 1316 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1317 case LINUX_REBOOT_CMD_CAD_OFF: 1318 return(0); 1319 default: 1320 return(EINVAL); 1321 } 1322 1323 return(sys_reboot(p, &sra, retval)); 1324 } 1325 1326 /* 1327 * Copy of compat_12_sys_swapon(). 1328 */ 1329 int 1330 linux_sys_swapon(p, v, retval) 1331 struct proc *p; 1332 void *v; 1333 register_t *retval; 1334 { 1335 struct sys_swapctl_args ua; 1336 struct linux_sys_swapon_args /* { 1337 syscallarg(const char *) name; 1338 } */ *uap = v; 1339 1340 SCARG(&ua, cmd) = SWAP_ON; 1341 SCARG(&ua, arg) = (void *)SCARG(uap, name); 1342 SCARG(&ua, misc) = 0; /* priority */ 1343 return (sys_swapctl(p, &ua, retval)); 1344 } 1345 1346 /* 1347 * Stop swapping to the file or block device specified by path. 1348 */ 1349 int 1350 linux_sys_swapoff(p, v, retval) 1351 struct proc *p; 1352 void *v; 1353 register_t *retval; 1354 { 1355 struct sys_swapctl_args ua; 1356 struct linux_sys_swapoff_args /* { 1357 syscallarg(const char *) path; 1358 } */ *uap = v; 1359 1360 SCARG(&ua, cmd) = SWAP_OFF; 1361 SCARG(&ua, arg) = (void *)SCARG(uap, path); 1362 return (sys_swapctl(p, &ua, retval)); 1363 } 1364 1365 /* 1366 * Copy of compat_09_sys_setdomainname() 1367 */ 1368 /* ARGSUSED */ 1369 int 1370 linux_sys_setdomainname(p, v, retval) 1371 struct proc *p; 1372 void *v; 1373 register_t *retval; 1374 { 1375 struct linux_sys_setdomainname_args /* { 1376 syscallarg(char *) domainname; 1377 syscallarg(int) len; 1378 } */ *uap = v; 1379 int name; 1380 int error; 1381 1382 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1383 return (error); 1384 name = KERN_DOMAINNAME; 1385 return (kern_sysctl(&name, 1, 0, 0, SCARG(uap, domainname), 1386 SCARG(uap, len), p)); 1387 } 1388 1389 /* 1390 * sysinfo() 1391 */ 1392 /* ARGSUSED */ 1393 int 1394 linux_sys_sysinfo(p, v, retval) 1395 struct proc *p; 1396 void *v; 1397 register_t *retval; 1398 { 1399 struct linux_sys_sysinfo_args /* { 1400 syscallarg(struct linux_sysinfo *) arg; 1401 } */ *uap = v; 1402 struct linux_sysinfo si; 1403 struct loadavg *la; 1404 1405 si.uptime = time.tv_sec - boottime.tv_sec; 1406 la = &averunnable; 1407 si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1408 si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1409 si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1410 si.totalram = ctob(physmem); 1411 si.freeram = uvmexp.free * uvmexp.pagesize; 1412 si.sharedram = 0; /* XXX */ 1413 si.bufferram = uvmexp.filepages * uvmexp.pagesize; 1414 si.totalswap = uvmexp.swpages * uvmexp.pagesize; 1415 si.freeswap = (uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize; 1416 si.procs = nprocs; 1417 1418 /* The following are only present in newer Linux kernels. */ 1419 si.totalbig = 0; 1420 si.freebig = 0; 1421 si.mem_unit = 1; 1422 1423 return (copyout(&si, SCARG(uap, arg), sizeof si)); 1424 } 1425 1426 /* 1427 * This gets called for unsupported syscalls. The difference to sys_nosys() 1428 * is that process does not get SIGSYS, the call just returns with ENOSYS. 1429 * This is the way Linux does it and glibc depends on this behaviour. 1430 */ 1431 int 1432 linux_sys_nosys(p, v, retval) 1433 struct proc *p; 1434 void *v; 1435 register_t *retval; 1436 { 1437 return (ENOSYS); 1438 } 1439