linux_misc.c revision 1.87
1 /* $NetBSD: linux_misc.c,v 1.87 2001/03/30 17:16:34 jdolecek 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_WCLONE)) 186 return (EINVAL); 187 188 if (linux_options & LINUX_WAIT4_WNOHANG) 189 options |= WNOHANG; 190 if (linux_options & LINUX_WAIT4_WUNTRACED) 191 options |= WUNTRACED; 192 if (linux_options & LINUX_WAIT4_WCLONE) 193 options |= WALTSIG; 194 195 SCARG(&w4a, pid) = SCARG(uap, pid); 196 SCARG(&w4a, status) = status; 197 SCARG(&w4a, options) = options; 198 SCARG(&w4a, rusage) = SCARG(uap, rusage); 199 200 if ((error = sys_wait4(p, &w4a, retval))) 201 return error; 202 203 sigdelset(&p->p_sigctx.ps_siglist, SIGCHLD); 204 205 if (status != NULL) { 206 if ((error = copyin(status, &tstat, sizeof tstat))) 207 return error; 208 209 bsd_to_linux_wstat(&tstat); 210 return copyout(&tstat, SCARG(uap, status), sizeof tstat); 211 } 212 213 return 0; 214 } 215 216 /* 217 * Linux brk(2). The check if the new address is >= the old one is 218 * done in the kernel in Linux. NetBSD does it in the library. 219 */ 220 int 221 linux_sys_brk(p, v, retval) 222 struct proc *p; 223 void *v; 224 register_t *retval; 225 { 226 struct linux_sys_brk_args /* { 227 syscallarg(char *) nsize; 228 } */ *uap = v; 229 char *nbrk = SCARG(uap, nsize); 230 struct sys_obreak_args oba; 231 struct vmspace *vm = p->p_vmspace; 232 struct linux_emuldata *ed = (struct linux_emuldata*)p->p_emuldata; 233 234 SCARG(&oba, nsize) = nbrk; 235 236 if ((caddr_t) nbrk > vm->vm_daddr && sys_obreak(p, &oba, retval) == 0) 237 ed->p_break = (char*)nbrk; 238 else 239 nbrk = ed->p_break; 240 241 retval[0] = (register_t)nbrk; 242 243 return 0; 244 } 245 246 /* 247 * Convert BSD statfs structure to Linux statfs structure. 248 * The Linux structure has less fields, and it also wants 249 * the length of a name in a dir entry in a field, which 250 * we fake (probably the wrong way). 251 */ 252 static void 253 bsd_to_linux_statfs(bsp, lsp) 254 struct statfs *bsp; 255 struct linux_statfs *lsp; 256 { 257 258 lsp->l_ftype = bsp->f_type; 259 lsp->l_fbsize = bsp->f_bsize; 260 lsp->l_fblocks = bsp->f_blocks; 261 lsp->l_fbfree = bsp->f_bfree; 262 lsp->l_fbavail = bsp->f_bavail; 263 lsp->l_ffiles = bsp->f_files; 264 lsp->l_fffree = bsp->f_ffree; 265 lsp->l_ffsid.val[0] = bsp->f_fsid.val[0]; 266 lsp->l_ffsid.val[1] = bsp->f_fsid.val[1]; 267 lsp->l_fnamelen = MAXNAMLEN; /* XXX */ 268 } 269 270 /* 271 * Implement the fs stat functions. Straightforward. 272 */ 273 int 274 linux_sys_statfs(p, v, retval) 275 struct proc *p; 276 void *v; 277 register_t *retval; 278 { 279 struct linux_sys_statfs_args /* { 280 syscallarg(const char *) path; 281 syscallarg(struct linux_statfs *) sp; 282 } */ *uap = v; 283 struct statfs btmp, *bsp; 284 struct linux_statfs ltmp; 285 struct sys_statfs_args bsa; 286 caddr_t sg; 287 int error; 288 289 sg = stackgap_init(p->p_emul); 290 bsp = (struct statfs *) stackgap_alloc(&sg, sizeof (struct statfs)); 291 292 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 293 294 SCARG(&bsa, path) = SCARG(uap, path); 295 SCARG(&bsa, buf) = bsp; 296 297 if ((error = sys_statfs(p, &bsa, retval))) 298 return error; 299 300 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 301 return error; 302 303 bsd_to_linux_statfs(&btmp, <mp); 304 305 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 306 } 307 308 int 309 linux_sys_fstatfs(p, v, retval) 310 struct proc *p; 311 void *v; 312 register_t *retval; 313 { 314 struct linux_sys_fstatfs_args /* { 315 syscallarg(int) fd; 316 syscallarg(struct linux_statfs *) sp; 317 } */ *uap = v; 318 struct statfs btmp, *bsp; 319 struct linux_statfs ltmp; 320 struct sys_fstatfs_args bsa; 321 caddr_t sg; 322 int error; 323 324 sg = stackgap_init(p->p_emul); 325 bsp = (struct statfs *) stackgap_alloc(&sg, sizeof (struct statfs)); 326 327 SCARG(&bsa, fd) = SCARG(uap, fd); 328 SCARG(&bsa, buf) = bsp; 329 330 if ((error = sys_fstatfs(p, &bsa, retval))) 331 return error; 332 333 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 334 return error; 335 336 bsd_to_linux_statfs(&btmp, <mp); 337 338 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 339 } 340 341 char linux_sysname[] = "Linux"; 342 char linux_release[] = "2.0.38"; 343 char linux_version[] = "#0 Sun Apr 1 11:11:11 MET 2000"; 344 345 /* 346 * uname(). Just copy the info from the various strings stored in the 347 * kernel, and put it in the Linux utsname structure. That structure 348 * is almost the same as the NetBSD one, only it has fields 65 characters 349 * long, and an extra domainname field. 350 */ 351 int 352 linux_sys_uname(p, v, retval) 353 struct proc *p; 354 void *v; 355 register_t *retval; 356 { 357 struct linux_sys_uname_args /* { 358 syscallarg(struct linux_utsname *) up; 359 } */ *uap = v; 360 struct linux_utsname luts; 361 362 strncpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 363 strncpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 364 strncpy(luts.l_release, linux_release, sizeof(luts.l_release)); 365 strncpy(luts.l_version, linux_version, sizeof(luts.l_version)); 366 strncpy(luts.l_machine, machine, sizeof(luts.l_machine)); 367 strncpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 368 369 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 370 } 371 372 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 373 /* Used indirectly on: arm, i386, m68k */ 374 375 /* 376 * New type Linux mmap call. 377 * Only called directly on machines with >= 6 free regs. 378 */ 379 int 380 linux_sys_mmap(p, v, retval) 381 struct proc *p; 382 void *v; 383 register_t *retval; 384 { 385 struct linux_sys_mmap_args /* { 386 syscallarg(unsigned long) addr; 387 syscallarg(size_t) len; 388 syscallarg(int) prot; 389 syscallarg(int) flags; 390 syscallarg(int) fd; 391 syscallarg(off_t) offset; 392 } */ *uap = v; 393 struct sys_mmap_args cma; 394 int flags; 395 396 flags = 0; 397 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_SHARED, MAP_SHARED); 398 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_PRIVATE, MAP_PRIVATE); 399 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_FIXED, MAP_FIXED); 400 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_ANON, MAP_ANON); 401 /* XXX XAX ERH: Any other flags here? There are more defined... */ 402 403 SCARG(&cma,addr) = (void *)SCARG(uap, addr); 404 SCARG(&cma,len) = SCARG(uap, len); 405 SCARG(&cma,prot) = SCARG(uap, prot); 406 if (SCARG(&cma,prot) & VM_PROT_WRITE) /* XXX */ 407 SCARG(&cma,prot) |= VM_PROT_READ; 408 SCARG(&cma,flags) = flags; 409 SCARG(&cma,fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 410 SCARG(&cma,pad) = 0; 411 SCARG(&cma,pos) = SCARG(uap, offset); 412 413 return sys_mmap(p, &cma, retval); 414 } 415 416 int 417 linux_sys_mremap(p, v, retval) 418 struct proc *p; 419 void *v; 420 register_t *retval; 421 { 422 struct linux_sys_mremap_args /* { 423 syscallarg(void *) old_address; 424 syscallarg(size_t) old_size; 425 syscallarg(size_t) new_size; 426 syscallarg(u_long) flags; 427 } */ *uap = v; 428 struct sys_munmap_args mua; 429 size_t old_size, new_size; 430 int error; 431 432 old_size = round_page(SCARG(uap, old_size)); 433 new_size = round_page(SCARG(uap, new_size)); 434 435 /* 436 * Growing mapped region. 437 */ 438 if (new_size > old_size) { 439 /* 440 * XXX Implement me. What we probably want to do is 441 * XXX dig out the guts of the old mapping, mmap that 442 * XXX object again with the new size, then munmap 443 * XXX the old mapping. 444 */ 445 *retval = 0; 446 return (ENOMEM); 447 } 448 449 /* 450 * Shrinking mapped region. 451 */ 452 if (new_size < old_size) { 453 SCARG(&mua, addr) = (caddr_t)SCARG(uap, old_address) + 454 new_size; 455 SCARG(&mua, len) = old_size - new_size; 456 error = sys_munmap(p, &mua, retval); 457 *retval = error ? 0 : (register_t)SCARG(uap, old_address); 458 return (error); 459 } 460 461 /* 462 * No change. 463 */ 464 *retval = (register_t)SCARG(uap, old_address); 465 return (0); 466 } 467 468 int 469 linux_sys_msync(p, v, retval) 470 struct proc *p; 471 void *v; 472 register_t *retval; 473 { 474 struct linux_sys_msync_args /* { 475 syscallarg(caddr_t) addr; 476 syscallarg(int) len; 477 syscallarg(int) fl; 478 } */ *uap = v; 479 480 struct sys___msync13_args bma; 481 482 /* flags are ignored */ 483 SCARG(&bma, addr) = SCARG(uap, addr); 484 SCARG(&bma, len) = SCARG(uap, len); 485 SCARG(&bma, flags) = SCARG(uap, fl); 486 487 return sys___msync13(p, &bma, retval); 488 } 489 490 /* 491 * This code is partly stolen from src/lib/libc/compat-43/times.c 492 * XXX - CLK_TCK isn't declared in /sys, just in <time.h>, done here 493 */ 494 495 #define CLK_TCK 100 496 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 497 498 int 499 linux_sys_times(p, v, retval) 500 struct proc *p; 501 void *v; 502 register_t *retval; 503 { 504 struct linux_sys_times_args /* { 505 syscallarg(struct times *) tms; 506 } */ *uap = v; 507 struct timeval t; 508 struct linux_tms ltms; 509 struct rusage ru; 510 int error, s; 511 512 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL); 513 ltms.ltms_utime = CONVTCK(ru.ru_utime); 514 ltms.ltms_stime = CONVTCK(ru.ru_stime); 515 516 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 517 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 518 519 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 520 return error; 521 522 s = splclock(); 523 timersub(&time, &boottime, &t); 524 splx(s); 525 526 retval[0] = ((linux_clock_t)(CONVTCK(t))); 527 return 0; 528 } 529 530 /* 531 * Linux 'readdir' call. This code is mostly taken from the 532 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 533 * an attempt has been made to keep it a little cleaner (failing 534 * miserably, because of the cruft needed if count 1 is passed). 535 * 536 * The d_off field should contain the offset of the next valid entry, 537 * but in Linux it has the offset of the entry itself. We emulate 538 * that bug here. 539 * 540 * Read in BSD-style entries, convert them, and copy them out. 541 * 542 * Note that this doesn't handle union-mounted filesystems. 543 */ 544 int 545 linux_sys_getdents(p, v, retval) 546 struct proc *p; 547 void *v; 548 register_t *retval; 549 { 550 struct linux_sys_getdents_args /* { 551 syscallarg(int) fd; 552 syscallarg(struct linux_dirent *) dent; 553 syscallarg(unsigned int) count; 554 } */ *uap = v; 555 struct dirent *bdp; 556 struct vnode *vp; 557 caddr_t inp, buf; /* BSD-format */ 558 int len, reclen; /* BSD-format */ 559 caddr_t outp; /* Linux-format */ 560 int resid, linux_reclen = 0; /* Linux-format */ 561 struct file *fp; 562 struct uio auio; 563 struct iovec aiov; 564 struct linux_dirent idb; 565 off_t off; /* true file offset */ 566 int buflen, error, eofflag, nbytes, oldcall; 567 struct vattr va; 568 off_t *cookiebuf = NULL, *cookie; 569 int ncookies; 570 571 /* getvnode() will use the descriptor for us */ 572 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 573 return (error); 574 575 if ((fp->f_flag & FREAD) == 0) { 576 error = EBADF; 577 goto out1; 578 } 579 580 vp = (struct vnode *)fp->f_data; 581 if (vp->v_type != VDIR) { 582 error = EINVAL; 583 goto out1; 584 } 585 586 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) 587 goto out1; 588 589 nbytes = SCARG(uap, count); 590 if (nbytes == 1) { /* emulating old, broken behaviour */ 591 nbytes = sizeof (struct linux_dirent); 592 buflen = max(va.va_blocksize, nbytes); 593 oldcall = 1; 594 } else { 595 buflen = min(MAXBSIZE, nbytes); 596 if (buflen < va.va_blocksize) 597 buflen = va.va_blocksize; 598 oldcall = 0; 599 } 600 buf = malloc(buflen, M_TEMP, M_WAITOK); 601 602 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 603 off = fp->f_offset; 604 again: 605 aiov.iov_base = buf; 606 aiov.iov_len = buflen; 607 auio.uio_iov = &aiov; 608 auio.uio_iovcnt = 1; 609 auio.uio_rw = UIO_READ; 610 auio.uio_segflg = UIO_SYSSPACE; 611 auio.uio_procp = p; 612 auio.uio_resid = buflen; 613 auio.uio_offset = off; 614 /* 615 * First we read into the malloc'ed buffer, then 616 * we massage it into user space, one record at a time. 617 */ 618 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 619 &ncookies); 620 if (error) 621 goto out; 622 623 inp = buf; 624 outp = (caddr_t)SCARG(uap, dent); 625 resid = nbytes; 626 if ((len = buflen - auio.uio_resid) == 0) 627 goto eof; 628 629 for (cookie = cookiebuf; len > 0; len -= reclen) { 630 bdp = (struct dirent *)inp; 631 reclen = bdp->d_reclen; 632 if (reclen & 3) 633 panic("linux_readdir"); 634 if (bdp->d_fileno == 0) { 635 inp += reclen; /* it is a hole; squish it out */ 636 off = *cookie++; 637 continue; 638 } 639 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 640 if (reclen > len || resid < linux_reclen) { 641 /* entry too big for buffer, so just stop */ 642 outp++; 643 break; 644 } 645 /* 646 * Massage in place to make a Linux-shaped dirent (otherwise 647 * we have to worry about touching user memory outside of 648 * the copyout() call). 649 */ 650 idb.d_ino = (linux_ino_t)bdp->d_fileno; 651 /* 652 * The old readdir() call misuses the offset and reclen fields. 653 */ 654 if (oldcall) { 655 idb.d_off = (linux_off_t)linux_reclen; 656 idb.d_reclen = (u_short)bdp->d_namlen; 657 } else { 658 if (sizeof (linux_off_t) < 4 && (off >> 32) != 0) { 659 compat_offseterr(vp, "linux_getdents"); 660 error = EINVAL; 661 goto out; 662 } 663 idb.d_off = (linux_off_t)off; 664 idb.d_reclen = (u_short)linux_reclen; 665 } 666 strcpy(idb.d_name, bdp->d_name); 667 if ((error = copyout((caddr_t)&idb, outp, linux_reclen))) 668 goto out; 669 /* advance past this real entry */ 670 inp += reclen; 671 off = *cookie++; /* each entry points to itself */ 672 /* advance output past Linux-shaped entry */ 673 outp += linux_reclen; 674 resid -= linux_reclen; 675 if (oldcall) 676 break; 677 } 678 679 /* if we squished out the whole block, try again */ 680 if (outp == (caddr_t)SCARG(uap, dent)) 681 goto again; 682 fp->f_offset = off; /* update the vnode offset */ 683 684 if (oldcall) 685 nbytes = resid + linux_reclen; 686 687 eof: 688 *retval = nbytes - resid; 689 out: 690 VOP_UNLOCK(vp, 0); 691 if (cookiebuf) 692 free(cookiebuf, M_TEMP); 693 free(buf, M_TEMP); 694 out1: 695 FILE_UNUSE(fp, p); 696 return error; 697 } 698 699 /* 700 * Even when just using registers to pass arguments to syscalls you can 701 * have 5 of them on the i386. So this newer version of select() does 702 * this. 703 */ 704 int 705 linux_sys_select(p, v, retval) 706 struct proc *p; 707 void *v; 708 register_t *retval; 709 { 710 struct linux_sys_select_args /* { 711 syscallarg(int) nfds; 712 syscallarg(fd_set *) readfds; 713 syscallarg(fd_set *) writefds; 714 syscallarg(fd_set *) exceptfds; 715 syscallarg(struct timeval *) timeout; 716 } */ *uap = v; 717 718 return linux_select1(p, retval, SCARG(uap, nfds), SCARG(uap, readfds), 719 SCARG(uap, writefds), SCARG(uap, exceptfds), SCARG(uap, timeout)); 720 } 721 722 /* 723 * Common code for the old and new versions of select(). A couple of 724 * things are important: 725 * 1) return the amount of time left in the 'timeout' parameter 726 * 2) select never returns ERESTART on Linux, always return EINTR 727 */ 728 int 729 linux_select1(p, retval, nfds, readfds, writefds, exceptfds, timeout) 730 struct proc *p; 731 register_t *retval; 732 int nfds; 733 fd_set *readfds, *writefds, *exceptfds; 734 struct timeval *timeout; 735 { 736 struct sys_select_args bsa; 737 struct timeval tv0, tv1, utv, *tvp; 738 caddr_t sg; 739 int error; 740 741 SCARG(&bsa, nd) = nfds; 742 SCARG(&bsa, in) = readfds; 743 SCARG(&bsa, ou) = writefds; 744 SCARG(&bsa, ex) = exceptfds; 745 SCARG(&bsa, tv) = timeout; 746 747 /* 748 * Store current time for computation of the amount of 749 * time left. 750 */ 751 if (timeout) { 752 if ((error = copyin(timeout, &utv, sizeof(utv)))) 753 return error; 754 if (itimerfix(&utv)) { 755 /* 756 * The timeval was invalid. Convert it to something 757 * valid that will act as it does under Linux. 758 */ 759 sg = stackgap_init(p->p_emul); 760 tvp = stackgap_alloc(&sg, sizeof(utv)); 761 utv.tv_sec += utv.tv_usec / 1000000; 762 utv.tv_usec %= 1000000; 763 if (utv.tv_usec < 0) { 764 utv.tv_sec -= 1; 765 utv.tv_usec += 1000000; 766 } 767 if (utv.tv_sec < 0) 768 timerclear(&utv); 769 if ((error = copyout(&utv, tvp, sizeof(utv)))) 770 return error; 771 SCARG(&bsa, tv) = tvp; 772 } 773 microtime(&tv0); 774 } 775 776 error = sys_select(p, &bsa, retval); 777 if (error) { 778 /* 779 * See fs/select.c in the Linux kernel. Without this, 780 * Maelstrom doesn't work. 781 */ 782 if (error == ERESTART) 783 error = EINTR; 784 return error; 785 } 786 787 if (timeout) { 788 if (*retval) { 789 /* 790 * Compute how much time was left of the timeout, 791 * by subtracting the current time and the time 792 * before we started the call, and subtracting 793 * that result from the user-supplied value. 794 */ 795 microtime(&tv1); 796 timersub(&tv1, &tv0, &tv1); 797 timersub(&utv, &tv1, &utv); 798 if (utv.tv_sec < 0) 799 timerclear(&utv); 800 } else 801 timerclear(&utv); 802 if ((error = copyout(&utv, timeout, sizeof(utv)))) 803 return error; 804 } 805 806 return 0; 807 } 808 809 /* 810 * Get the process group of a certain process. Look it up 811 * and return the value. 812 */ 813 int 814 linux_sys_getpgid(p, v, retval) 815 struct proc *p; 816 void *v; 817 register_t *retval; 818 { 819 struct linux_sys_getpgid_args /* { 820 syscallarg(int) pid; 821 } */ *uap = v; 822 struct proc *targp; 823 824 if (SCARG(uap, pid) != 0 && SCARG(uap, pid) != p->p_pid) { 825 if ((targp = pfind(SCARG(uap, pid))) == 0) 826 return ESRCH; 827 } 828 else 829 targp = p; 830 831 retval[0] = targp->p_pgid; 832 return 0; 833 } 834 835 /* 836 * Set the 'personality' (emulation mode) for the current process. Only 837 * accept the Linux personality here (0). This call is needed because 838 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 839 * ELF binaries run in Linux mode, not SVR4 mode. 840 */ 841 int 842 linux_sys_personality(p, v, retval) 843 struct proc *p; 844 void *v; 845 register_t *retval; 846 { 847 struct linux_sys_personality_args /* { 848 syscallarg(int) per; 849 } */ *uap = v; 850 851 if (SCARG(uap, per) != 0) 852 return EINVAL; 853 retval[0] = 0; 854 return 0; 855 } 856 857 #if defined(__i386__) || defined(__m68k__) 858 /* 859 * The calls are here because of type conversions. 860 */ 861 int 862 linux_sys_setreuid16(p, v, retval) 863 struct proc *p; 864 void *v; 865 register_t *retval; 866 { 867 struct linux_sys_setreuid16_args /* { 868 syscallarg(int) ruid; 869 syscallarg(int) euid; 870 } */ *uap = v; 871 struct sys_setreuid_args bsa; 872 873 SCARG(&bsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 874 (uid_t)-1 : SCARG(uap, ruid); 875 SCARG(&bsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 876 (uid_t)-1 : SCARG(uap, euid); 877 878 return sys_setreuid(p, &bsa, retval); 879 } 880 881 int 882 linux_sys_setregid16(p, v, retval) 883 struct proc *p; 884 void *v; 885 register_t *retval; 886 { 887 struct linux_sys_setregid16_args /* { 888 syscallarg(int) rgid; 889 syscallarg(int) egid; 890 } */ *uap = v; 891 struct sys_setregid_args bsa; 892 893 SCARG(&bsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 894 (uid_t)-1 : SCARG(uap, rgid); 895 SCARG(&bsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 896 (uid_t)-1 : SCARG(uap, egid); 897 898 return sys_setregid(p, &bsa, retval); 899 } 900 901 int 902 linux_sys_setresuid16(p, v, retval) 903 struct proc *p; 904 void *v; 905 register_t *retval; 906 { 907 struct linux_sys_setresuid16_args /* { 908 syscallarg(uid_t) ruid; 909 syscallarg(uid_t) euid; 910 syscallarg(uid_t) suid; 911 } */ *uap = v; 912 struct linux_sys_setresuid16_args lsa; 913 914 SCARG(&lsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 915 (uid_t)-1 : SCARG(uap, ruid); 916 SCARG(&lsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 917 (uid_t)-1 : SCARG(uap, euid); 918 SCARG(&lsa, suid) = ((linux_uid_t)SCARG(uap, suid) == (linux_uid_t)-1) ? 919 (uid_t)-1 : SCARG(uap, suid); 920 921 return linux_sys_setresuid(p, &lsa, retval); 922 } 923 924 int 925 linux_sys_setresgid16(p, v, retval) 926 struct proc *p; 927 void *v; 928 register_t *retval; 929 { 930 struct linux_sys_setresgid16_args /* { 931 syscallarg(gid_t) rgid; 932 syscallarg(gid_t) egid; 933 syscallarg(gid_t) sgid; 934 } */ *uap = v; 935 struct linux_sys_setresgid16_args lsa; 936 937 SCARG(&lsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 938 (gid_t)-1 : SCARG(uap, rgid); 939 SCARG(&lsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 940 (gid_t)-1 : SCARG(uap, egid); 941 SCARG(&lsa, sgid) = ((linux_gid_t)SCARG(uap, sgid) == (linux_gid_t)-1) ? 942 (gid_t)-1 : SCARG(uap, sgid); 943 944 return linux_sys_setresgid(p, &lsa, retval); 945 } 946 947 int 948 linux_sys_getgroups16(p, v, retval) 949 struct proc *p; 950 void *v; 951 register_t *retval; 952 { 953 struct linux_sys_getgroups16_args /* { 954 syscallarg(int) gidsetsize; 955 syscallarg(linux_gid_t *) gidset; 956 } */ *uap = v; 957 caddr_t sg; 958 int n, error, i; 959 struct sys_getgroups_args bsa; 960 gid_t *bset, *kbset; 961 linux_gid_t *lset; 962 struct pcred *pc = p->p_cred; 963 964 n = SCARG(uap, gidsetsize); 965 if (n < 0) 966 return EINVAL; 967 error = 0; 968 bset = kbset = NULL; 969 lset = NULL; 970 if (n > 0) { 971 n = min(pc->pc_ucred->cr_ngroups, n); 972 sg = stackgap_init(p->p_emul); 973 bset = stackgap_alloc(&sg, n * sizeof (gid_t)); 974 kbset = malloc(n * sizeof (gid_t), M_TEMP, M_WAITOK); 975 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 976 if (bset == NULL || kbset == NULL || lset == NULL) 977 return ENOMEM; 978 SCARG(&bsa, gidsetsize) = n; 979 SCARG(&bsa, gidset) = bset; 980 error = sys_getgroups(p, &bsa, retval); 981 if (error != 0) 982 goto out; 983 error = copyin(bset, kbset, n * sizeof (gid_t)); 984 if (error != 0) 985 goto out; 986 for (i = 0; i < n; i++) 987 lset[i] = (linux_gid_t)kbset[i]; 988 error = copyout(lset, SCARG(uap, gidset), 989 n * sizeof (linux_gid_t)); 990 } else 991 *retval = pc->pc_ucred->cr_ngroups; 992 out: 993 if (kbset != NULL) 994 free(kbset, M_TEMP); 995 if (lset != NULL) 996 free(lset, M_TEMP); 997 return error; 998 } 999 1000 int 1001 linux_sys_setgroups16(p, v, retval) 1002 struct proc *p; 1003 void *v; 1004 register_t *retval; 1005 { 1006 struct linux_sys_setgroups16_args /* { 1007 syscallarg(int) gidsetsize; 1008 syscallarg(linux_gid_t *) gidset; 1009 } */ *uap = v; 1010 caddr_t sg; 1011 int n; 1012 int error, i; 1013 struct sys_setgroups_args bsa; 1014 gid_t *bset, *kbset; 1015 linux_gid_t *lset; 1016 1017 n = SCARG(uap, gidsetsize); 1018 if (n < 0 || n > NGROUPS) 1019 return EINVAL; 1020 sg = stackgap_init(p->p_emul); 1021 bset = stackgap_alloc(&sg, n * sizeof (gid_t)); 1022 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1023 kbset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1024 if (lset == NULL || bset == NULL) 1025 return ENOMEM; 1026 error = copyin(SCARG(uap, gidset), lset, n * sizeof (linux_gid_t)); 1027 if (error != 0) 1028 goto out; 1029 for (i = 0; i < n; i++) 1030 kbset[i] = (gid_t)lset[i]; 1031 error = copyout(kbset, bset, n * sizeof (gid_t)); 1032 if (error != 0) 1033 goto out; 1034 SCARG(&bsa, gidsetsize) = n; 1035 SCARG(&bsa, gidset) = bset; 1036 error = sys_setgroups(p, &bsa, retval); 1037 1038 out: 1039 if (lset != NULL) 1040 free(lset, M_TEMP); 1041 if (kbset != NULL) 1042 free(kbset, M_TEMP); 1043 1044 return error; 1045 } 1046 1047 #endif /* __i386__ || __m68k__ */ 1048 1049 /* 1050 * We have nonexistent fsuid equal to uid. 1051 * If modification is requested, refuse. 1052 */ 1053 int 1054 linux_sys_setfsuid(p, v, retval) 1055 struct proc *p; 1056 void *v; 1057 register_t *retval; 1058 { 1059 struct linux_sys_setfsuid_args /* { 1060 syscallarg(uid_t) uid; 1061 } */ *uap = v; 1062 uid_t uid; 1063 1064 uid = SCARG(uap, uid); 1065 if (p->p_cred->p_ruid != uid) 1066 return sys_nosys(p, v, retval); 1067 else 1068 return (0); 1069 } 1070 1071 /* XXX XXX XXX */ 1072 #ifndef alpha 1073 int 1074 linux_sys_getfsuid(p, v, retval) 1075 struct proc *p; 1076 void *v; 1077 register_t *retval; 1078 { 1079 return sys_getuid(p, v, retval); 1080 } 1081 #endif 1082 1083 int 1084 linux_sys___sysctl(p, v, retval) 1085 struct proc *p; 1086 void *v; 1087 register_t *retval; 1088 { 1089 struct linux_sys___sysctl_args /* { 1090 syscallarg(struct linux___sysctl *) lsp; 1091 } */ *uap = v; 1092 struct linux___sysctl ls; 1093 struct sys___sysctl_args bsa; 1094 int error; 1095 1096 if ((error = copyin(SCARG(uap, lsp), &ls, sizeof ls))) 1097 return error; 1098 SCARG(&bsa, name) = ls.name; 1099 SCARG(&bsa, namelen) = ls.namelen; 1100 SCARG(&bsa, old) = ls.old; 1101 SCARG(&bsa, oldlenp) = ls.oldlenp; 1102 SCARG(&bsa, new) = ls.new; 1103 SCARG(&bsa, newlen) = ls.newlen; 1104 1105 return sys___sysctl(p, &bsa, retval); 1106 } 1107 1108 int 1109 linux_sys_setresuid(p, v, retval) 1110 struct proc *p; 1111 void *v; 1112 register_t *retval; 1113 { 1114 struct linux_sys_setresuid_args /* { 1115 syscallarg(uid_t) ruid; 1116 syscallarg(uid_t) euid; 1117 syscallarg(uid_t) suid; 1118 } */ *uap = v; 1119 struct pcred *pc = p->p_cred; 1120 uid_t ruid, euid, suid; 1121 int error; 1122 1123 ruid = SCARG(uap, ruid); 1124 euid = SCARG(uap, euid); 1125 suid = SCARG(uap, suid); 1126 1127 /* 1128 * Note: These checks are a little different than the NetBSD 1129 * setreuid(2) call performs. This precisely follows the 1130 * behavior of the Linux kernel. 1131 */ 1132 if (ruid != (uid_t)-1 && 1133 ruid != pc->p_ruid && 1134 ruid != pc->pc_ucred->cr_uid && 1135 ruid != pc->p_svuid && 1136 (error = suser(pc->pc_ucred, &p->p_acflag))) 1137 return (error); 1138 1139 if (euid != (uid_t)-1 && 1140 euid != pc->p_ruid && 1141 euid != pc->pc_ucred->cr_uid && 1142 euid != pc->p_svuid && 1143 (error = suser(pc->pc_ucred, &p->p_acflag))) 1144 return (error); 1145 1146 if (suid != (uid_t)-1 && 1147 suid != pc->p_ruid && 1148 suid != pc->pc_ucred->cr_uid && 1149 suid != pc->p_svuid && 1150 (error = suser(pc->pc_ucred, &p->p_acflag))) 1151 return (error); 1152 1153 /* 1154 * Now assign the new real, effective, and saved UIDs. 1155 * Note that Linux, unlike NetBSD in setreuid(2), does not 1156 * set the saved UID in this call unless the user specifies 1157 * it. 1158 */ 1159 if (ruid != (uid_t)-1) { 1160 (void)chgproccnt(pc->p_ruid, -1); 1161 (void)chgproccnt(ruid, 1); 1162 pc->p_ruid = ruid; 1163 } 1164 1165 if (euid != (uid_t)-1) { 1166 pc->pc_ucred = crcopy(pc->pc_ucred); 1167 pc->pc_ucred->cr_uid = euid; 1168 } 1169 1170 if (suid != (uid_t)-1) 1171 pc->p_svuid = suid; 1172 1173 if (ruid != (uid_t)-1 && euid != (uid_t)-1 && suid != (uid_t)-1) 1174 p->p_flag |= P_SUGID; 1175 return (0); 1176 } 1177 1178 int 1179 linux_sys_getresuid(p, v, retval) 1180 struct proc *p; 1181 void *v; 1182 register_t *retval; 1183 { 1184 struct linux_sys_getresuid_args /* { 1185 syscallarg(uid_t *) ruid; 1186 syscallarg(uid_t *) euid; 1187 syscallarg(uid_t *) suid; 1188 } */ *uap = v; 1189 struct pcred *pc = p->p_cred; 1190 int error; 1191 1192 /* 1193 * Linux copies these values out to userspace like so: 1194 * 1195 * 1. Copy out ruid. 1196 * 2. If that succeeds, copy out euid. 1197 * 3. If both of those succeed, copy out suid. 1198 */ 1199 if ((error = copyout(&pc->p_ruid, SCARG(uap, ruid), 1200 sizeof(uid_t))) != 0) 1201 return (error); 1202 1203 if ((error = copyout(&pc->pc_ucred->cr_uid, SCARG(uap, euid), 1204 sizeof(uid_t))) != 0) 1205 return (error); 1206 1207 return (copyout(&pc->p_svuid, SCARG(uap, suid), sizeof(uid_t))); 1208 } 1209 1210 int 1211 linux_sys_ptrace(p, v, retval) 1212 struct proc *p; 1213 void *v; 1214 register_t *retval; 1215 { 1216 struct linux_sys_ptrace_args /* { 1217 i386, m68k: T=int 1218 alpha: T=long 1219 syscallarg(T) request; 1220 syscallarg(T) pid; 1221 syscallarg(T) addr; 1222 syscallarg(T) data; 1223 } */ *uap = v; 1224 const int *ptr; 1225 int request; 1226 1227 ptr = linux_ptrace_request_map; 1228 request = SCARG(uap, request); 1229 while (*ptr != -1) 1230 if (*ptr++ == request) { 1231 struct sys_ptrace_args pta; 1232 caddr_t sg; 1233 1234 sg = stackgap_init(p->p_emul); 1235 1236 SCARG(&pta, req) = *ptr; 1237 SCARG(&pta, pid) = SCARG(uap, pid); 1238 SCARG(&pta, addr) = (caddr_t)SCARG(uap, addr); 1239 SCARG(&pta, data) = SCARG(uap, data); 1240 1241 /* 1242 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1243 * to continue as the process left off previously, 1244 * i.e. same as if NetBSD ptrace called with 1245 * addr == (caddr_t) 1. 1246 */ 1247 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1248 SCARG(&pta, addr) = (caddr_t) 1; 1249 1250 return sys_ptrace(p, &pta, retval); 1251 } 1252 else 1253 ptr++; 1254 1255 return LINUX_SYS_PTRACE_ARCH(p, uap, retval); 1256 } 1257 1258 int 1259 linux_sys_reboot(struct proc *p, void *v, register_t *retval) 1260 { 1261 struct linux_sys_reboot_args /* { 1262 syscallarg(int) magic1; 1263 syscallarg(int) magic2; 1264 syscallarg(int) cmd; 1265 syscallarg(void *) arg; 1266 } */ *uap = v; 1267 struct sys_reboot_args /* { 1268 syscallarg(int) opt; 1269 syscallarg(char *) bootstr; 1270 } */ sra; 1271 int error; 1272 1273 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1274 return(error); 1275 1276 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1277 return(EINVAL); 1278 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1279 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1280 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1281 return(EINVAL); 1282 1283 switch (SCARG(uap, cmd)) { 1284 case LINUX_REBOOT_CMD_RESTART: 1285 SCARG(&sra, opt) = RB_AUTOBOOT; 1286 break; 1287 case LINUX_REBOOT_CMD_HALT: 1288 SCARG(&sra, opt) = RB_HALT; 1289 break; 1290 case LINUX_REBOOT_CMD_POWER_OFF: 1291 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1292 break; 1293 case LINUX_REBOOT_CMD_RESTART2: 1294 /* Reboot with an argument. */ 1295 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1296 SCARG(&sra, bootstr) = SCARG(uap, arg); 1297 break; 1298 case LINUX_REBOOT_CMD_CAD_ON: 1299 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1300 case LINUX_REBOOT_CMD_CAD_OFF: 1301 return(0); 1302 default: 1303 return(EINVAL); 1304 } 1305 1306 return(sys_reboot(p, &sra, retval)); 1307 } 1308 1309 /* 1310 * Copy of compat_12_sys_swapon(). 1311 */ 1312 int 1313 linux_sys_swapon(p, v, retval) 1314 struct proc *p; 1315 void *v; 1316 register_t *retval; 1317 { 1318 struct sys_swapctl_args ua; 1319 struct linux_sys_swapon_args /* { 1320 syscallarg(const char *) name; 1321 } */ *uap = v; 1322 1323 SCARG(&ua, cmd) = SWAP_ON; 1324 SCARG(&ua, arg) = (void *)SCARG(uap, name); 1325 SCARG(&ua, misc) = 0; /* priority */ 1326 return (sys_swapctl(p, &ua, retval)); 1327 } 1328 1329 /* 1330 * Stop swapping to the file or block device specified by path. 1331 */ 1332 int 1333 linux_sys_swapoff(p, v, retval) 1334 struct proc *p; 1335 void *v; 1336 register_t *retval; 1337 { 1338 struct sys_swapctl_args ua; 1339 struct linux_sys_swapoff_args /* { 1340 syscallarg(const char *) path; 1341 } */ *uap = v; 1342 1343 SCARG(&ua, cmd) = SWAP_OFF; 1344 SCARG(&ua, arg) = (void *)SCARG(uap, path); 1345 return (sys_swapctl(p, &ua, retval)); 1346 } 1347 1348 /* 1349 * Copy of compat_09_sys_setdomainname() 1350 */ 1351 /* ARGSUSED */ 1352 int 1353 linux_sys_setdomainname(p, v, retval) 1354 struct proc *p; 1355 void *v; 1356 register_t *retval; 1357 { 1358 struct linux_sys_setdomainname_args /* { 1359 syscallarg(char *) domainname; 1360 syscallarg(int) len; 1361 } */ *uap = v; 1362 int name; 1363 int error; 1364 1365 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1366 return (error); 1367 name = KERN_DOMAINNAME; 1368 return (kern_sysctl(&name, 1, 0, 0, SCARG(uap, domainname), 1369 SCARG(uap, len), p)); 1370 } 1371 1372 /* 1373 * sysinfo() 1374 */ 1375 /* ARGSUSED */ 1376 int 1377 linux_sys_sysinfo(p, v, retval) 1378 struct proc *p; 1379 void *v; 1380 register_t *retval; 1381 { 1382 struct linux_sys_sysinfo_args /* { 1383 syscallarg(struct linux_sysinfo *) arg; 1384 } */ *uap = v; 1385 struct linux_sysinfo si; 1386 struct loadavg *la; 1387 1388 si.uptime = time.tv_sec - boottime.tv_sec; 1389 la = &averunnable; 1390 si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1391 si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1392 si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1393 si.totalram = ctob(physmem); 1394 si.freeram = uvmexp.free * uvmexp.pagesize; 1395 si.sharedram = 0; /* XXX */ 1396 si.bufferram = uvmexp.vnodepages * uvmexp.pagesize; 1397 si.totalswap = uvmexp.swpages * uvmexp.pagesize; 1398 si.freeswap = (uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize; 1399 si.procs = nprocs; 1400 1401 /* The following are only present in newer Linux kernels. */ 1402 si.totalbig = 0; 1403 si.freebig = 0; 1404 si.mem_unit = 1; 1405 1406 return (copyout(&si, SCARG(uap, arg), sizeof si)); 1407 } 1408 1409 /* 1410 * This gets called for unsupported syscalls. The difference to sys_nosys() 1411 * is that process does not get SIGSYS, the call just returns with ENOSYS. 1412 * This is the way Linux does it and glibc depends on this behaviour. 1413 */ 1414 int 1415 linux_sys_nosys(p, v, retval) 1416 struct proc *p; 1417 void *v; 1418 register_t *retval; 1419 { 1420 return (ENOSYS); 1421 } 1422
Indexes created Sun Sep 21 20:09:37 GMT 2025