1 /* $NetBSD: linux_misc.c,v 1.94 2001/09/08 07:09:44 manu 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/param.h> 67 #include <sys/systm.h> 68 #include <sys/namei.h> 69 #include <sys/proc.h> 70 #include <sys/dirent.h> 71 #include <sys/file.h> 72 #include <sys/stat.h> 73 #include <sys/filedesc.h> 74 #include <sys/ioctl.h> 75 #include <sys/kernel.h> 76 #include <sys/malloc.h> 77 #include <sys/mbuf.h> 78 #include <sys/mman.h> 79 #include <sys/mount.h> 80 #include <sys/reboot.h> 81 #include <sys/resource.h> 82 #include <sys/resourcevar.h> 83 #include <sys/signal.h> 84 #include <sys/signalvar.h> 85 #include <sys/socket.h> 86 #include <sys/time.h> 87 #include <sys/times.h> 88 #include <sys/vnode.h> 89 #include <sys/uio.h> 90 #include <sys/wait.h> 91 #include <sys/utsname.h> 92 #include <sys/unistd.h> 93 #include <sys/swap.h> /* for SWAP_ON */ 94 #include <sys/sysctl.h> /* for KERN_DOMAINNAME */ 95 96 #include <sys/ptrace.h> 97 #include <machine/ptrace.h> 98 99 #include <sys/syscallargs.h> 100 101 #include <compat/linux/common/linux_types.h> 102 #include <compat/linux/common/linux_signal.h> 103 104 #include <compat/linux/linux_syscallargs.h> 105 106 #include <compat/linux/common/linux_fcntl.h> 107 #include <compat/linux/common/linux_mmap.h> 108 #include <compat/linux/common/linux_dirent.h> 109 #include <compat/linux/common/linux_util.h> 110 #include <compat/linux/common/linux_misc.h> 111 #include <compat/linux/common/linux_ptrace.h> 112 #include <compat/linux/common/linux_reboot.h> 113 #include <compat/linux/common/linux_emuldata.h> 114 115 const int linux_ptrace_request_map[] = { 116 LINUX_PTRACE_TRACEME, PT_TRACE_ME, 117 LINUX_PTRACE_PEEKTEXT, PT_READ_I, 118 LINUX_PTRACE_PEEKDATA, PT_READ_D, 119 LINUX_PTRACE_POKETEXT, PT_WRITE_I, 120 LINUX_PTRACE_POKEDATA, PT_WRITE_D, 121 LINUX_PTRACE_CONT, PT_CONTINUE, 122 LINUX_PTRACE_KILL, PT_KILL, 123 LINUX_PTRACE_ATTACH, PT_ATTACH, 124 LINUX_PTRACE_DETACH, PT_DETACH, 125 #ifdef PT_STEP 126 LINUX_PTRACE_SINGLESTEP, PT_STEP, 127 #endif 128 -1 129 }; 130 131 /* Local linux_misc.c functions: */ 132 static void bsd_to_linux_statfs __P((struct statfs *, struct linux_statfs *)); 133 134 /* 135 * The information on a terminated (or stopped) process needs 136 * to be converted in order for Linux binaries to get a valid signal 137 * number out of it. 138 */ 139 void 140 bsd_to_linux_wstat(st) 141 int *st; 142 { 143 144 int sig; 145 146 if (WIFSIGNALED(*st)) { 147 sig = WTERMSIG(*st); 148 if (sig >= 0 && sig < NSIG) 149 *st= (*st& ~0177) | native_to_linux_sig[sig]; 150 } else if (WIFSTOPPED(*st)) { 151 sig = WSTOPSIG(*st); 152 if (sig >= 0 && sig < NSIG) 153 *st = (*st & ~0xff00) | (native_to_linux_sig[sig] << 8); 154 } 155 } 156 157 /* 158 * This is very much the same as waitpid() 159 */ 160 int 161 linux_sys_wait4(p, v, retval) 162 struct proc *p; 163 void *v; 164 register_t *retval; 165 { 166 struct linux_sys_wait4_args /* { 167 syscallarg(int) pid; 168 syscallarg(int *) status; 169 syscallarg(int) options; 170 syscallarg(struct rusage *) rusage; 171 } */ *uap = v; 172 struct sys_wait4_args w4a; 173 int error, *status, tstat, options, linux_options; 174 caddr_t sg; 175 176 if (SCARG(uap, status) != NULL) { 177 sg = stackgap_init(p->p_emul); 178 status = (int *) stackgap_alloc(&sg, sizeof *status); 179 } else 180 status = NULL; 181 182 linux_options = SCARG(uap, options); 183 options = 0; 184 if (linux_options & 185 ~(LINUX_WAIT4_WNOHANG|LINUX_WAIT4_WUNTRACED|LINUX_WAIT4_WALL| 186 LINUX_WAIT4_WCLONE)) 187 return (EINVAL); 188 189 if (linux_options & LINUX_WAIT4_WNOHANG) 190 options |= WNOHANG; 191 if (linux_options & LINUX_WAIT4_WUNTRACED) 192 options |= WUNTRACED; 193 if (linux_options & LINUX_WAIT4_WALL) 194 options |= WALLSIG; 195 if (linux_options & LINUX_WAIT4_WCLONE) 196 options |= WALTSIG; 197 198 SCARG(&w4a, pid) = SCARG(uap, pid); 199 SCARG(&w4a, status) = status; 200 SCARG(&w4a, options) = options; 201 SCARG(&w4a, rusage) = SCARG(uap, rusage); 202 203 if ((error = sys_wait4(p, &w4a, retval))) 204 return error; 205 206 sigdelset(&p->p_sigctx.ps_siglist, SIGCHLD); 207 208 if (status != NULL) { 209 if ((error = copyin(status, &tstat, sizeof tstat))) 210 return error; 211 212 bsd_to_linux_wstat(&tstat); 213 return copyout(&tstat, SCARG(uap, status), sizeof tstat); 214 } 215 216 return 0; 217 } 218 219 /* 220 * Linux brk(2). The check if the new address is >= the old one is 221 * done in the kernel in Linux. NetBSD does it in the library. 222 */ 223 int 224 linux_sys_brk(p, v, retval) 225 struct proc *p; 226 void *v; 227 register_t *retval; 228 { 229 struct linux_sys_brk_args /* { 230 syscallarg(char *) nsize; 231 } */ *uap = v; 232 char *nbrk = SCARG(uap, nsize); 233 struct sys_obreak_args oba; 234 struct vmspace *vm = p->p_vmspace; 235 struct linux_emuldata *ed = (struct linux_emuldata*)p->p_emuldata; 236 237 SCARG(&oba, nsize) = nbrk; 238 239 if ((caddr_t) nbrk > vm->vm_daddr && sys_obreak(p, &oba, retval) == 0) 240 ed->p_break = (char*)nbrk; 241 else 242 nbrk = ed->p_break; 243 244 retval[0] = (register_t)nbrk; 245 246 return 0; 247 } 248 249 /* 250 * Convert BSD statfs structure to Linux statfs structure. 251 * The Linux structure has less fields, and it also wants 252 * the length of a name in a dir entry in a field, which 253 * we fake (probably the wrong way). 254 */ 255 static void 256 bsd_to_linux_statfs(bsp, lsp) 257 struct statfs *bsp; 258 struct linux_statfs *lsp; 259 { 260 261 lsp->l_ftype = bsp->f_type; 262 lsp->l_fbsize = bsp->f_bsize; 263 lsp->l_fblocks = bsp->f_blocks; 264 lsp->l_fbfree = bsp->f_bfree; 265 lsp->l_fbavail = bsp->f_bavail; 266 lsp->l_ffiles = bsp->f_files; 267 lsp->l_fffree = bsp->f_ffree; 268 lsp->l_ffsid.val[0] = bsp->f_fsid.val[0]; 269 lsp->l_ffsid.val[1] = bsp->f_fsid.val[1]; 270 lsp->l_fnamelen = MAXNAMLEN; /* XXX */ 271 } 272 273 /* 274 * Implement the fs stat functions. Straightforward. 275 */ 276 int 277 linux_sys_statfs(p, v, retval) 278 struct proc *p; 279 void *v; 280 register_t *retval; 281 { 282 struct linux_sys_statfs_args /* { 283 syscallarg(const char *) path; 284 syscallarg(struct linux_statfs *) sp; 285 } */ *uap = v; 286 struct statfs btmp, *bsp; 287 struct linux_statfs ltmp; 288 struct sys_statfs_args bsa; 289 caddr_t sg; 290 int error; 291 292 sg = stackgap_init(p->p_emul); 293 bsp = (struct statfs *) stackgap_alloc(&sg, sizeof (struct statfs)); 294 295 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 296 297 SCARG(&bsa, path) = SCARG(uap, path); 298 SCARG(&bsa, buf) = bsp; 299 300 if ((error = sys_statfs(p, &bsa, retval))) 301 return error; 302 303 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 304 return error; 305 306 bsd_to_linux_statfs(&btmp, <mp); 307 308 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 309 } 310 311 int 312 linux_sys_fstatfs(p, v, retval) 313 struct proc *p; 314 void *v; 315 register_t *retval; 316 { 317 struct linux_sys_fstatfs_args /* { 318 syscallarg(int) fd; 319 syscallarg(struct linux_statfs *) sp; 320 } */ *uap = v; 321 struct statfs btmp, *bsp; 322 struct linux_statfs ltmp; 323 struct sys_fstatfs_args bsa; 324 caddr_t sg; 325 int error; 326 327 sg = stackgap_init(p->p_emul); 328 bsp = (struct statfs *) stackgap_alloc(&sg, sizeof (struct statfs)); 329 330 SCARG(&bsa, fd) = SCARG(uap, fd); 331 SCARG(&bsa, buf) = bsp; 332 333 if ((error = sys_fstatfs(p, &bsa, retval))) 334 return error; 335 336 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 337 return error; 338 339 bsd_to_linux_statfs(&btmp, <mp); 340 341 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 342 } 343 344 char linux_sysname[] = "Linux"; 345 char linux_release[] = "2.0.38"; 346 char linux_version[] = "#0 Sun Apr 1 11:11:11 MET 2000"; 347 348 /* 349 * uname(). Just copy the info from the various strings stored in the 350 * kernel, and put it in the Linux utsname structure. That structure 351 * is almost the same as the NetBSD one, only it has fields 65 characters 352 * long, and an extra domainname field. 353 */ 354 int 355 linux_sys_uname(p, v, retval) 356 struct proc *p; 357 void *v; 358 register_t *retval; 359 { 360 struct linux_sys_uname_args /* { 361 syscallarg(struct linux_utsname *) up; 362 } */ *uap = v; 363 struct linux_utsname luts; 364 365 strncpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 366 strncpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 367 strncpy(luts.l_release, linux_release, sizeof(luts.l_release)); 368 strncpy(luts.l_version, linux_version, sizeof(luts.l_version)); 369 strncpy(luts.l_machine, machine, sizeof(luts.l_machine)); 370 strncpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 371 372 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 373 } 374 375 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 376 /* Used indirectly on: arm, i386, m68k */ 377 378 /* 379 * New type Linux mmap call. 380 * Only called directly on machines with >= 6 free regs. 381 */ 382 int 383 linux_sys_mmap(p, v, retval) 384 struct proc *p; 385 void *v; 386 register_t *retval; 387 { 388 struct linux_sys_mmap_args /* { 389 syscallarg(unsigned long) addr; 390 syscallarg(size_t) len; 391 syscallarg(int) prot; 392 syscallarg(int) flags; 393 syscallarg(int) fd; 394 syscallarg(linux_off_t) offset; 395 } */ *uap = v; 396 struct sys_mmap_args cma; 397 int flags; 398 399 flags = 0; 400 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_SHARED, MAP_SHARED); 401 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_PRIVATE, MAP_PRIVATE); 402 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_FIXED, MAP_FIXED); 403 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_ANON, MAP_ANON); 404 /* XXX XAX ERH: Any other flags here? There are more defined... */ 405 406 SCARG(&cma,addr) = (void *)SCARG(uap, addr); 407 SCARG(&cma,len) = SCARG(uap, len); 408 SCARG(&cma,prot) = SCARG(uap, prot); 409 if (SCARG(&cma,prot) & VM_PROT_WRITE) /* XXX */ 410 SCARG(&cma,prot) |= VM_PROT_READ; 411 SCARG(&cma,flags) = flags; 412 SCARG(&cma,fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 413 SCARG(&cma,pad) = 0; 414 SCARG(&cma,pos) = (off_t)SCARG(uap, offset); 415 416 return sys_mmap(p, &cma, retval); 417 } 418 419 int 420 linux_sys_mremap(p, v, retval) 421 struct proc *p; 422 void *v; 423 register_t *retval; 424 { 425 struct linux_sys_mremap_args /* { 426 syscallarg(void *) old_address; 427 syscallarg(size_t) old_size; 428 syscallarg(size_t) new_size; 429 syscallarg(u_long) flags; 430 } */ *uap = v; 431 struct sys_munmap_args mua; 432 size_t old_size, new_size; 433 int error; 434 435 old_size = round_page(SCARG(uap, old_size)); 436 new_size = round_page(SCARG(uap, new_size)); 437 438 /* 439 * Growing mapped region. 440 */ 441 if (new_size > old_size) { 442 /* 443 * XXX Implement me. What we probably want to do is 444 * XXX dig out the guts of the old mapping, mmap that 445 * XXX object again with the new size, then munmap 446 * XXX the old mapping. 447 */ 448 *retval = 0; 449 return (ENOMEM); 450 } 451 452 /* 453 * Shrinking mapped region. 454 */ 455 if (new_size < old_size) { 456 SCARG(&mua, addr) = (caddr_t)SCARG(uap, old_address) + 457 new_size; 458 SCARG(&mua, len) = old_size - new_size; 459 error = sys_munmap(p, &mua, retval); 460 *retval = error ? 0 : (register_t)SCARG(uap, old_address); 461 return (error); 462 } 463 464 /* 465 * No change. 466 */ 467 *retval = (register_t)SCARG(uap, old_address); 468 return (0); 469 } 470 471 int 472 linux_sys_msync(p, v, retval) 473 struct proc *p; 474 void *v; 475 register_t *retval; 476 { 477 struct linux_sys_msync_args /* { 478 syscallarg(caddr_t) addr; 479 syscallarg(int) len; 480 syscallarg(int) fl; 481 } */ *uap = v; 482 483 struct sys___msync13_args bma; 484 485 /* flags are ignored */ 486 SCARG(&bma, addr) = SCARG(uap, addr); 487 SCARG(&bma, len) = SCARG(uap, len); 488 SCARG(&bma, flags) = SCARG(uap, fl); 489 490 return sys___msync13(p, &bma, retval); 491 } 492 493 /* 494 * This code is partly stolen from src/lib/libc/compat-43/times.c 495 * XXX - CLK_TCK isn't declared in /sys, just in <time.h>, done here 496 */ 497 498 #define CLK_TCK 100 499 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 500 501 int 502 linux_sys_times(p, v, retval) 503 struct proc *p; 504 void *v; 505 register_t *retval; 506 { 507 struct linux_sys_times_args /* { 508 syscallarg(struct times *) tms; 509 } */ *uap = v; 510 struct timeval t; 511 struct linux_tms ltms; 512 struct rusage ru; 513 int error, s; 514 515 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL); 516 ltms.ltms_utime = CONVTCK(ru.ru_utime); 517 ltms.ltms_stime = CONVTCK(ru.ru_stime); 518 519 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 520 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 521 522 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 523 return error; 524 525 s = splclock(); 526 timersub(&time, &boottime, &t); 527 splx(s); 528 529 retval[0] = ((linux_clock_t)(CONVTCK(t))); 530 return 0; 531 } 532 533 /* 534 * Linux 'readdir' call. This code is mostly taken from the 535 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 536 * an attempt has been made to keep it a little cleaner (failing 537 * miserably, because of the cruft needed if count 1 is passed). 538 * 539 * The d_off field should contain the offset of the next valid entry, 540 * but in Linux it has the offset of the entry itself. We emulate 541 * that bug here. 542 * 543 * Read in BSD-style entries, convert them, and copy them out. 544 * 545 * Note that this doesn't handle union-mounted filesystems. 546 */ 547 int 548 linux_sys_getdents(p, v, retval) 549 struct proc *p; 550 void *v; 551 register_t *retval; 552 { 553 struct linux_sys_getdents_args /* { 554 syscallarg(int) fd; 555 syscallarg(struct linux_dirent *) dent; 556 syscallarg(unsigned int) count; 557 } */ *uap = v; 558 struct dirent *bdp; 559 struct vnode *vp; 560 caddr_t inp, buf; /* BSD-format */ 561 int len, reclen; /* BSD-format */ 562 caddr_t outp; /* Linux-format */ 563 int resid, linux_reclen = 0; /* Linux-format */ 564 struct file *fp; 565 struct uio auio; 566 struct iovec aiov; 567 struct linux_dirent idb; 568 off_t off; /* true file offset */ 569 int buflen, error, eofflag, nbytes, oldcall; 570 struct vattr va; 571 off_t *cookiebuf = NULL, *cookie; 572 int ncookies; 573 574 /* getvnode() will use the descriptor for us */ 575 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 576 return (error); 577 578 if ((fp->f_flag & FREAD) == 0) { 579 error = EBADF; 580 goto out1; 581 } 582 583 vp = (struct vnode *)fp->f_data; 584 if (vp->v_type != VDIR) { 585 error = EINVAL; 586 goto out1; 587 } 588 589 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) 590 goto out1; 591 592 nbytes = SCARG(uap, count); 593 if (nbytes == 1) { /* emulating old, broken behaviour */ 594 nbytes = sizeof (struct linux_dirent); 595 buflen = max(va.va_blocksize, nbytes); 596 oldcall = 1; 597 } else { 598 buflen = min(MAXBSIZE, nbytes); 599 if (buflen < va.va_blocksize) 600 buflen = va.va_blocksize; 601 oldcall = 0; 602 } 603 buf = malloc(buflen, M_TEMP, M_WAITOK); 604 605 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 606 off = fp->f_offset; 607 again: 608 aiov.iov_base = buf; 609 aiov.iov_len = buflen; 610 auio.uio_iov = &aiov; 611 auio.uio_iovcnt = 1; 612 auio.uio_rw = UIO_READ; 613 auio.uio_segflg = UIO_SYSSPACE; 614 auio.uio_procp = p; 615 auio.uio_resid = buflen; 616 auio.uio_offset = off; 617 /* 618 * First we read into the malloc'ed buffer, then 619 * we massage it into user space, one record at a time. 620 */ 621 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 622 &ncookies); 623 if (error) 624 goto out; 625 626 inp = buf; 627 outp = (caddr_t)SCARG(uap, dent); 628 resid = nbytes; 629 if ((len = buflen - auio.uio_resid) == 0) 630 goto eof; 631 632 for (cookie = cookiebuf; len > 0; len -= reclen) { 633 bdp = (struct dirent *)inp; 634 reclen = bdp->d_reclen; 635 if (reclen & 3) 636 panic("linux_readdir"); 637 if (bdp->d_fileno == 0) { 638 inp += reclen; /* it is a hole; squish it out */ 639 off = *cookie++; 640 continue; 641 } 642 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 643 if (reclen > len || resid < linux_reclen) { 644 /* entry too big for buffer, so just stop */ 645 outp++; 646 break; 647 } 648 /* 649 * Massage in place to make a Linux-shaped dirent (otherwise 650 * we have to worry about touching user memory outside of 651 * the copyout() call). 652 */ 653 idb.d_ino = (linux_ino_t)bdp->d_fileno; 654 /* 655 * The old readdir() call misuses the offset and reclen fields. 656 */ 657 if (oldcall) { 658 idb.d_off = (linux_off_t)linux_reclen; 659 idb.d_reclen = (u_short)bdp->d_namlen; 660 } else { 661 if (sizeof (linux_off_t) < 4 && (off >> 32) != 0) { 662 compat_offseterr(vp, "linux_getdents"); 663 error = EINVAL; 664 goto out; 665 } 666 idb.d_off = (linux_off_t)off; 667 idb.d_reclen = (u_short)linux_reclen; 668 } 669 strcpy(idb.d_name, bdp->d_name); 670 if ((error = copyout((caddr_t)&idb, outp, linux_reclen))) 671 goto out; 672 /* advance past this real entry */ 673 inp += reclen; 674 off = *cookie++; /* each entry points to itself */ 675 /* advance output past Linux-shaped entry */ 676 outp += linux_reclen; 677 resid -= linux_reclen; 678 if (oldcall) 679 break; 680 } 681 682 /* if we squished out the whole block, try again */ 683 if (outp == (caddr_t)SCARG(uap, dent)) 684 goto again; 685 fp->f_offset = off; /* update the vnode offset */ 686 687 if (oldcall) 688 nbytes = resid + linux_reclen; 689 690 eof: 691 *retval = nbytes - resid; 692 out: 693 VOP_UNLOCK(vp, 0); 694 if (cookiebuf) 695 free(cookiebuf, M_TEMP); 696 free(buf, M_TEMP); 697 out1: 698 FILE_UNUSE(fp, p); 699 return error; 700 } 701 702 /* 703 * Even when just using registers to pass arguments to syscalls you can 704 * have 5 of them on the i386. So this newer version of select() does 705 * this. 706 */ 707 int 708 linux_sys_select(p, v, retval) 709 struct proc *p; 710 void *v; 711 register_t *retval; 712 { 713 struct linux_sys_select_args /* { 714 syscallarg(int) nfds; 715 syscallarg(fd_set *) readfds; 716 syscallarg(fd_set *) writefds; 717 syscallarg(fd_set *) exceptfds; 718 syscallarg(struct timeval *) timeout; 719 } */ *uap = v; 720 721 return linux_select1(p, retval, SCARG(uap, nfds), SCARG(uap, readfds), 722 SCARG(uap, writefds), SCARG(uap, exceptfds), SCARG(uap, timeout)); 723 } 724 725 /* 726 * Common code for the old and new versions of select(). A couple of 727 * things are important: 728 * 1) return the amount of time left in the 'timeout' parameter 729 * 2) select never returns ERESTART on Linux, always return EINTR 730 */ 731 int 732 linux_select1(p, retval, nfds, readfds, writefds, exceptfds, timeout) 733 struct proc *p; 734 register_t *retval; 735 int nfds; 736 fd_set *readfds, *writefds, *exceptfds; 737 struct timeval *timeout; 738 { 739 struct sys_select_args bsa; 740 struct timeval tv0, tv1, utv, *tvp; 741 caddr_t sg; 742 int error; 743 744 SCARG(&bsa, nd) = nfds; 745 SCARG(&bsa, in) = readfds; 746 SCARG(&bsa, ou) = writefds; 747 SCARG(&bsa, ex) = exceptfds; 748 SCARG(&bsa, tv) = timeout; 749 750 /* 751 * Store current time for computation of the amount of 752 * time left. 753 */ 754 if (timeout) { 755 if ((error = copyin(timeout, &utv, sizeof(utv)))) 756 return error; 757 if (itimerfix(&utv)) { 758 /* 759 * The timeval was invalid. Convert it to something 760 * valid that will act as it does under Linux. 761 */ 762 sg = stackgap_init(p->p_emul); 763 tvp = stackgap_alloc(&sg, sizeof(utv)); 764 utv.tv_sec += utv.tv_usec / 1000000; 765 utv.tv_usec %= 1000000; 766 if (utv.tv_usec < 0) { 767 utv.tv_sec -= 1; 768 utv.tv_usec += 1000000; 769 } 770 if (utv.tv_sec < 0) 771 timerclear(&utv); 772 if ((error = copyout(&utv, tvp, sizeof(utv)))) 773 return error; 774 SCARG(&bsa, tv) = tvp; 775 } 776 microtime(&tv0); 777 } 778 779 error = sys_select(p, &bsa, retval); 780 if (error) { 781 /* 782 * See fs/select.c in the Linux kernel. Without this, 783 * Maelstrom doesn't work. 784 */ 785 if (error == ERESTART) 786 error = EINTR; 787 return error; 788 } 789 790 if (timeout) { 791 if (*retval) { 792 /* 793 * Compute how much time was left of the timeout, 794 * by subtracting the current time and the time 795 * before we started the call, and subtracting 796 * that result from the user-supplied value. 797 */ 798 microtime(&tv1); 799 timersub(&tv1, &tv0, &tv1); 800 timersub(&utv, &tv1, &utv); 801 if (utv.tv_sec < 0) 802 timerclear(&utv); 803 } else 804 timerclear(&utv); 805 if ((error = copyout(&utv, timeout, sizeof(utv)))) 806 return error; 807 } 808 809 return 0; 810 } 811 812 /* 813 * Get the process group of a certain process. Look it up 814 * and return the value. 815 */ 816 int 817 linux_sys_getpgid(p, v, retval) 818 struct proc *p; 819 void *v; 820 register_t *retval; 821 { 822 struct linux_sys_getpgid_args /* { 823 syscallarg(int) pid; 824 } */ *uap = v; 825 struct proc *targp; 826 827 if (SCARG(uap, pid) != 0 && SCARG(uap, pid) != p->p_pid) { 828 if ((targp = pfind(SCARG(uap, pid))) == 0) 829 return ESRCH; 830 } 831 else 832 targp = p; 833 834 retval[0] = targp->p_pgid; 835 return 0; 836 } 837 838 /* 839 * Set the 'personality' (emulation mode) for the current process. Only 840 * accept the Linux personality here (0). This call is needed because 841 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 842 * ELF binaries run in Linux mode, not SVR4 mode. 843 */ 844 int 845 linux_sys_personality(p, v, retval) 846 struct proc *p; 847 void *v; 848 register_t *retval; 849 { 850 struct linux_sys_personality_args /* { 851 syscallarg(int) per; 852 } */ *uap = v; 853 854 if (SCARG(uap, per) != 0) 855 return EINVAL; 856 retval[0] = 0; 857 return 0; 858 } 859 860 #if defined(__i386__) || defined(__m68k__) 861 /* 862 * The calls are here because of type conversions. 863 */ 864 int 865 linux_sys_setreuid16(p, v, retval) 866 struct proc *p; 867 void *v; 868 register_t *retval; 869 { 870 struct linux_sys_setreuid16_args /* { 871 syscallarg(int) ruid; 872 syscallarg(int) euid; 873 } */ *uap = v; 874 struct sys_setreuid_args bsa; 875 876 SCARG(&bsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 877 (uid_t)-1 : SCARG(uap, ruid); 878 SCARG(&bsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 879 (uid_t)-1 : SCARG(uap, euid); 880 881 return sys_setreuid(p, &bsa, retval); 882 } 883 884 int 885 linux_sys_setregid16(p, v, retval) 886 struct proc *p; 887 void *v; 888 register_t *retval; 889 { 890 struct linux_sys_setregid16_args /* { 891 syscallarg(int) rgid; 892 syscallarg(int) egid; 893 } */ *uap = v; 894 struct sys_setregid_args bsa; 895 896 SCARG(&bsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 897 (uid_t)-1 : SCARG(uap, rgid); 898 SCARG(&bsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 899 (uid_t)-1 : SCARG(uap, egid); 900 901 return sys_setregid(p, &bsa, retval); 902 } 903 904 int 905 linux_sys_setresuid16(p, v, retval) 906 struct proc *p; 907 void *v; 908 register_t *retval; 909 { 910 struct linux_sys_setresuid16_args /* { 911 syscallarg(uid_t) ruid; 912 syscallarg(uid_t) euid; 913 syscallarg(uid_t) suid; 914 } */ *uap = v; 915 struct linux_sys_setresuid16_args lsa; 916 917 SCARG(&lsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 918 (uid_t)-1 : SCARG(uap, ruid); 919 SCARG(&lsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 920 (uid_t)-1 : SCARG(uap, euid); 921 SCARG(&lsa, suid) = ((linux_uid_t)SCARG(uap, suid) == (linux_uid_t)-1) ? 922 (uid_t)-1 : SCARG(uap, suid); 923 924 return linux_sys_setresuid(p, &lsa, retval); 925 } 926 927 int 928 linux_sys_setresgid16(p, v, retval) 929 struct proc *p; 930 void *v; 931 register_t *retval; 932 { 933 struct linux_sys_setresgid16_args /* { 934 syscallarg(gid_t) rgid; 935 syscallarg(gid_t) egid; 936 syscallarg(gid_t) sgid; 937 } */ *uap = v; 938 struct linux_sys_setresgid16_args lsa; 939 940 SCARG(&lsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 941 (gid_t)-1 : SCARG(uap, rgid); 942 SCARG(&lsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 943 (gid_t)-1 : SCARG(uap, egid); 944 SCARG(&lsa, sgid) = ((linux_gid_t)SCARG(uap, sgid) == (linux_gid_t)-1) ? 945 (gid_t)-1 : SCARG(uap, sgid); 946 947 return linux_sys_setresgid(p, &lsa, retval); 948 } 949 950 int 951 linux_sys_getgroups16(p, v, retval) 952 struct proc *p; 953 void *v; 954 register_t *retval; 955 { 956 struct linux_sys_getgroups16_args /* { 957 syscallarg(int) gidsetsize; 958 syscallarg(linux_gid_t *) gidset; 959 } */ *uap = v; 960 caddr_t sg; 961 int n, error, i; 962 struct sys_getgroups_args bsa; 963 gid_t *bset, *kbset; 964 linux_gid_t *lset; 965 struct pcred *pc = p->p_cred; 966 967 n = SCARG(uap, gidsetsize); 968 if (n < 0) 969 return EINVAL; 970 error = 0; 971 bset = kbset = NULL; 972 lset = NULL; 973 if (n > 0) { 974 n = min(pc->pc_ucred->cr_ngroups, n); 975 sg = stackgap_init(p->p_emul); 976 bset = stackgap_alloc(&sg, n * sizeof (gid_t)); 977 kbset = malloc(n * sizeof (gid_t), M_TEMP, M_WAITOK); 978 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 979 if (bset == NULL || kbset == NULL || lset == NULL) 980 return ENOMEM; 981 SCARG(&bsa, gidsetsize) = n; 982 SCARG(&bsa, gidset) = bset; 983 error = sys_getgroups(p, &bsa, retval); 984 if (error != 0) 985 goto out; 986 error = copyin(bset, kbset, n * sizeof (gid_t)); 987 if (error != 0) 988 goto out; 989 for (i = 0; i < n; i++) 990 lset[i] = (linux_gid_t)kbset[i]; 991 error = copyout(lset, SCARG(uap, gidset), 992 n * sizeof (linux_gid_t)); 993 } else 994 *retval = pc->pc_ucred->cr_ngroups; 995 out: 996 if (kbset != NULL) 997 free(kbset, M_TEMP); 998 if (lset != NULL) 999 free(lset, M_TEMP); 1000 return error; 1001 } 1002 1003 int 1004 linux_sys_setgroups16(p, v, retval) 1005 struct proc *p; 1006 void *v; 1007 register_t *retval; 1008 { 1009 struct linux_sys_setgroups16_args /* { 1010 syscallarg(int) gidsetsize; 1011 syscallarg(linux_gid_t *) gidset; 1012 } */ *uap = v; 1013 caddr_t sg; 1014 int n; 1015 int error, i; 1016 struct sys_setgroups_args bsa; 1017 gid_t *bset, *kbset; 1018 linux_gid_t *lset; 1019 1020 n = SCARG(uap, gidsetsize); 1021 if (n < 0 || n > NGROUPS) 1022 return EINVAL; 1023 sg = stackgap_init(p->p_emul); 1024 bset = stackgap_alloc(&sg, n * sizeof (gid_t)); 1025 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1026 kbset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1027 if (lset == NULL || bset == NULL) 1028 return ENOMEM; 1029 error = copyin(SCARG(uap, gidset), lset, n * sizeof (linux_gid_t)); 1030 if (error != 0) 1031 goto out; 1032 for (i = 0; i < n; i++) 1033 kbset[i] = (gid_t)lset[i]; 1034 error = copyout(kbset, bset, n * sizeof (gid_t)); 1035 if (error != 0) 1036 goto out; 1037 SCARG(&bsa, gidsetsize) = n; 1038 SCARG(&bsa, gidset) = bset; 1039 error = sys_setgroups(p, &bsa, retval); 1040 1041 out: 1042 if (lset != NULL) 1043 free(lset, M_TEMP); 1044 if (kbset != NULL) 1045 free(kbset, M_TEMP); 1046 1047 return error; 1048 } 1049 1050 #endif /* __i386__ || __m68k__ */ 1051 1052 /* 1053 * We have nonexistent fsuid equal to uid. 1054 * If modification is requested, refuse. 1055 */ 1056 int 1057 linux_sys_setfsuid(p, v, retval) 1058 struct proc *p; 1059 void *v; 1060 register_t *retval; 1061 { 1062 struct linux_sys_setfsuid_args /* { 1063 syscallarg(uid_t) uid; 1064 } */ *uap = v; 1065 uid_t uid; 1066 1067 uid = SCARG(uap, uid); 1068 if (p->p_cred->p_ruid != uid) 1069 return sys_nosys(p, v, retval); 1070 else 1071 return (0); 1072 } 1073 1074 /* XXX XXX XXX */ 1075 #ifndef alpha 1076 int 1077 linux_sys_getfsuid(p, v, retval) 1078 struct proc *p; 1079 void *v; 1080 register_t *retval; 1081 { 1082 return sys_getuid(p, v, retval); 1083 } 1084 #endif 1085 1086 int 1087 linux_sys___sysctl(p, v, retval) 1088 struct proc *p; 1089 void *v; 1090 register_t *retval; 1091 { 1092 struct linux_sys___sysctl_args /* { 1093 syscallarg(struct linux___sysctl *) lsp; 1094 } */ *uap = v; 1095 struct linux___sysctl ls; 1096 struct sys___sysctl_args bsa; 1097 int error; 1098 1099 if ((error = copyin(SCARG(uap, lsp), &ls, sizeof ls))) 1100 return error; 1101 SCARG(&bsa, name) = ls.name; 1102 SCARG(&bsa, namelen) = ls.namelen; 1103 SCARG(&bsa, old) = ls.old; 1104 SCARG(&bsa, oldlenp) = ls.oldlenp; 1105 SCARG(&bsa, new) = ls.new; 1106 SCARG(&bsa, newlen) = ls.newlen; 1107 1108 return sys___sysctl(p, &bsa, retval); 1109 } 1110 1111 int 1112 linux_sys_setresuid(p, v, retval) 1113 struct proc *p; 1114 void *v; 1115 register_t *retval; 1116 { 1117 struct linux_sys_setresuid_args /* { 1118 syscallarg(uid_t) ruid; 1119 syscallarg(uid_t) euid; 1120 syscallarg(uid_t) suid; 1121 } */ *uap = v; 1122 struct pcred *pc = p->p_cred; 1123 uid_t ruid, euid, suid; 1124 int error; 1125 1126 ruid = SCARG(uap, ruid); 1127 euid = SCARG(uap, euid); 1128 suid = SCARG(uap, suid); 1129 1130 /* 1131 * Note: These checks are a little different than the NetBSD 1132 * setreuid(2) call performs. This precisely follows the 1133 * behavior of the Linux kernel. 1134 */ 1135 if (ruid != (uid_t)-1 && 1136 ruid != pc->p_ruid && 1137 ruid != pc->pc_ucred->cr_uid && 1138 ruid != pc->p_svuid && 1139 (error = suser(pc->pc_ucred, &p->p_acflag))) 1140 return (error); 1141 1142 if (euid != (uid_t)-1 && 1143 euid != pc->p_ruid && 1144 euid != pc->pc_ucred->cr_uid && 1145 euid != pc->p_svuid && 1146 (error = suser(pc->pc_ucred, &p->p_acflag))) 1147 return (error); 1148 1149 if (suid != (uid_t)-1 && 1150 suid != pc->p_ruid && 1151 suid != pc->pc_ucred->cr_uid && 1152 suid != pc->p_svuid && 1153 (error = suser(pc->pc_ucred, &p->p_acflag))) 1154 return (error); 1155 1156 /* 1157 * Now assign the new real, effective, and saved UIDs. 1158 * Note that Linux, unlike NetBSD in setreuid(2), does not 1159 * set the saved UID in this call unless the user specifies 1160 * it. 1161 */ 1162 if (ruid != (uid_t)-1) { 1163 (void)chgproccnt(pc->p_ruid, -1); 1164 (void)chgproccnt(ruid, 1); 1165 pc->p_ruid = ruid; 1166 } 1167 1168 if (euid != (uid_t)-1) { 1169 pc->pc_ucred = crcopy(pc->pc_ucred); 1170 pc->pc_ucred->cr_uid = euid; 1171 } 1172 1173 if (suid != (uid_t)-1) 1174 pc->p_svuid = suid; 1175 1176 if (ruid != (uid_t)-1 && euid != (uid_t)-1 && suid != (uid_t)-1) 1177 p->p_flag |= P_SUGID; 1178 return (0); 1179 } 1180 1181 int 1182 linux_sys_getresuid(p, v, retval) 1183 struct proc *p; 1184 void *v; 1185 register_t *retval; 1186 { 1187 struct linux_sys_getresuid_args /* { 1188 syscallarg(uid_t *) ruid; 1189 syscallarg(uid_t *) euid; 1190 syscallarg(uid_t *) suid; 1191 } */ *uap = v; 1192 struct pcred *pc = p->p_cred; 1193 int error; 1194 1195 /* 1196 * Linux copies these values out to userspace like so: 1197 * 1198 * 1. Copy out ruid. 1199 * 2. If that succeeds, copy out euid. 1200 * 3. If both of those succeed, copy out suid. 1201 */ 1202 if ((error = copyout(&pc->p_ruid, SCARG(uap, ruid), 1203 sizeof(uid_t))) != 0) 1204 return (error); 1205 1206 if ((error = copyout(&pc->pc_ucred->cr_uid, SCARG(uap, euid), 1207 sizeof(uid_t))) != 0) 1208 return (error); 1209 1210 return (copyout(&pc->p_svuid, SCARG(uap, suid), sizeof(uid_t))); 1211 } 1212 1213 int 1214 linux_sys_ptrace(p, v, retval) 1215 struct proc *p; 1216 void *v; 1217 register_t *retval; 1218 { 1219 struct linux_sys_ptrace_args /* { 1220 i386, m68k, powerpc: T=int 1221 alpha: T=long 1222 syscallarg(T) request; 1223 syscallarg(T) pid; 1224 syscallarg(T) addr; 1225 syscallarg(T) data; 1226 } */ *uap = v; 1227 const int *ptr; 1228 int request; 1229 int error; 1230 1231 ptr = linux_ptrace_request_map; 1232 request = SCARG(uap, request); 1233 while (*ptr != -1) 1234 if (*ptr++ == request) { 1235 struct sys_ptrace_args pta; 1236 1237 SCARG(&pta, req) = *ptr; 1238 SCARG(&pta, pid) = SCARG(uap, pid); 1239 SCARG(&pta, addr) = (caddr_t)SCARG(uap, addr); 1240 SCARG(&pta, data) = SCARG(uap, data); 1241 1242 /* 1243 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1244 * to continue where the process left off previously. 1245 * The same thing is achieved by addr == (caddr_t) 1 1246 * on NetBSD, so rewrite 'addr' appropriately. 1247 */ 1248 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1249 SCARG(&pta, addr) = (caddr_t) 1; 1250 1251 error = sys_ptrace(p, &pta, retval); 1252 if (error) 1253 return error; 1254 switch (request) { 1255 case LINUX_PTRACE_PEEKTEXT: 1256 case LINUX_PTRACE_PEEKDATA: 1257 error = copyout (retval, 1258 (caddr_t)SCARG(uap, data), sizeof *retval); 1259 *retval = SCARG(uap, data); 1260 break; 1261 default: 1262 break; 1263 } 1264 return error; 1265 } 1266 else 1267 ptr++; 1268 1269 return LINUX_SYS_PTRACE_ARCH(p, uap, retval); 1270 } 1271 1272 int 1273 linux_sys_reboot(struct proc *p, void *v, register_t *retval) 1274 { 1275 struct linux_sys_reboot_args /* { 1276 syscallarg(int) magic1; 1277 syscallarg(int) magic2; 1278 syscallarg(int) cmd; 1279 syscallarg(void *) arg; 1280 } */ *uap = v; 1281 struct sys_reboot_args /* { 1282 syscallarg(int) opt; 1283 syscallarg(char *) bootstr; 1284 } */ sra; 1285 int error; 1286 1287 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1288 return(error); 1289 1290 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1291 return(EINVAL); 1292 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1293 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1294 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1295 return(EINVAL); 1296 1297 switch (SCARG(uap, cmd)) { 1298 case LINUX_REBOOT_CMD_RESTART: 1299 SCARG(&sra, opt) = RB_AUTOBOOT; 1300 break; 1301 case LINUX_REBOOT_CMD_HALT: 1302 SCARG(&sra, opt) = RB_HALT; 1303 break; 1304 case LINUX_REBOOT_CMD_POWER_OFF: 1305 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1306 break; 1307 case LINUX_REBOOT_CMD_RESTART2: 1308 /* Reboot with an argument. */ 1309 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1310 SCARG(&sra, bootstr) = SCARG(uap, arg); 1311 break; 1312 case LINUX_REBOOT_CMD_CAD_ON: 1313 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1314 case LINUX_REBOOT_CMD_CAD_OFF: 1315 return(0); 1316 default: 1317 return(EINVAL); 1318 } 1319 1320 return(sys_reboot(p, &sra, retval)); 1321 } 1322 1323 /* 1324 * Copy of compat_12_sys_swapon(). 1325 */ 1326 int 1327 linux_sys_swapon(p, v, retval) 1328 struct proc *p; 1329 void *v; 1330 register_t *retval; 1331 { 1332 struct sys_swapctl_args ua; 1333 struct linux_sys_swapon_args /* { 1334 syscallarg(const char *) name; 1335 } */ *uap = v; 1336 1337 SCARG(&ua, cmd) = SWAP_ON; 1338 SCARG(&ua, arg) = (void *)SCARG(uap, name); 1339 SCARG(&ua, misc) = 0; /* priority */ 1340 return (sys_swapctl(p, &ua, retval)); 1341 } 1342 1343 /* 1344 * Stop swapping to the file or block device specified by path. 1345 */ 1346 int 1347 linux_sys_swapoff(p, v, retval) 1348 struct proc *p; 1349 void *v; 1350 register_t *retval; 1351 { 1352 struct sys_swapctl_args ua; 1353 struct linux_sys_swapoff_args /* { 1354 syscallarg(const char *) path; 1355 } */ *uap = v; 1356 1357 SCARG(&ua, cmd) = SWAP_OFF; 1358 SCARG(&ua, arg) = (void *)SCARG(uap, path); 1359 return (sys_swapctl(p, &ua, retval)); 1360 } 1361 1362 /* 1363 * Copy of compat_09_sys_setdomainname() 1364 */ 1365 /* ARGSUSED */ 1366 int 1367 linux_sys_setdomainname(p, v, retval) 1368 struct proc *p; 1369 void *v; 1370 register_t *retval; 1371 { 1372 struct linux_sys_setdomainname_args /* { 1373 syscallarg(char *) domainname; 1374 syscallarg(int) len; 1375 } */ *uap = v; 1376 int name; 1377 int error; 1378 1379 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1380 return (error); 1381 name = KERN_DOMAINNAME; 1382 return (kern_sysctl(&name, 1, 0, 0, SCARG(uap, domainname), 1383 SCARG(uap, len), p)); 1384 } 1385 1386 /* 1387 * sysinfo() 1388 */ 1389 /* ARGSUSED */ 1390 int 1391 linux_sys_sysinfo(p, v, retval) 1392 struct proc *p; 1393 void *v; 1394 register_t *retval; 1395 { 1396 struct linux_sys_sysinfo_args /* { 1397 syscallarg(struct linux_sysinfo *) arg; 1398 } */ *uap = v; 1399 struct linux_sysinfo si; 1400 struct loadavg *la; 1401 1402 si.uptime = time.tv_sec - boottime.tv_sec; 1403 la = &averunnable; 1404 si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1405 si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1406 si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1407 si.totalram = ctob(physmem); 1408 si.freeram = uvmexp.free * uvmexp.pagesize; 1409 si.sharedram = 0; /* XXX */ 1410 si.bufferram = uvmexp.vnodepages * uvmexp.pagesize; 1411 si.totalswap = uvmexp.swpages * uvmexp.pagesize; 1412 si.freeswap = (uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize; 1413 si.procs = nprocs; 1414 1415 /* The following are only present in newer Linux kernels. */ 1416 si.totalbig = 0; 1417 si.freebig = 0; 1418 si.mem_unit = 1; 1419 1420 return (copyout(&si, SCARG(uap, arg), sizeof si)); 1421 } 1422 1423 /* 1424 * This gets called for unsupported syscalls. The difference to sys_nosys() 1425 * is that process does not get SIGSYS, the call just returns with ENOSYS. 1426 * This is the way Linux does it and glibc depends on this behaviour. 1427 */ 1428 int 1429 linux_sys_nosys(p, v, retval) 1430 struct proc *p; 1431 void *v; 1432 register_t *retval; 1433 { 1434 return (ENOSYS); 1435 } 1436