1 /* $NetBSD: linux_misc.c,v 1.121 2003/06/29 22:29:30 fvdl 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 1.121 2003/06/29 22:29:30 fvdl 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/sa.h> 103 #include <sys/syscallargs.h> 104 105 #include <compat/linux/common/linux_types.h> 106 #include <compat/linux/common/linux_signal.h> 107 108 #include <compat/linux/linux_syscallargs.h> 109 110 #include <compat/linux/common/linux_fcntl.h> 111 #include <compat/linux/common/linux_mmap.h> 112 #include <compat/linux/common/linux_dirent.h> 113 #include <compat/linux/common/linux_util.h> 114 #include <compat/linux/common/linux_misc.h> 115 #include <compat/linux/common/linux_ptrace.h> 116 #include <compat/linux/common/linux_reboot.h> 117 #include <compat/linux/common/linux_emuldata.h> 118 119 const int linux_ptrace_request_map[] = { 120 LINUX_PTRACE_TRACEME, PT_TRACE_ME, 121 LINUX_PTRACE_PEEKTEXT, PT_READ_I, 122 LINUX_PTRACE_PEEKDATA, PT_READ_D, 123 LINUX_PTRACE_POKETEXT, PT_WRITE_I, 124 LINUX_PTRACE_POKEDATA, PT_WRITE_D, 125 LINUX_PTRACE_CONT, PT_CONTINUE, 126 LINUX_PTRACE_KILL, PT_KILL, 127 LINUX_PTRACE_ATTACH, PT_ATTACH, 128 LINUX_PTRACE_DETACH, PT_DETACH, 129 #ifdef PT_STEP 130 LINUX_PTRACE_SINGLESTEP, PT_STEP, 131 #endif 132 -1 133 }; 134 135 static const struct mnttypes { 136 char *bsd; 137 int linux; 138 } fstypes[] = { 139 { MOUNT_FFS, LINUX_DEFAULT_SUPER_MAGIC }, 140 { MOUNT_NFS, LINUX_NFS_SUPER_MAGIC }, 141 { MOUNT_MFS, LINUX_DEFAULT_SUPER_MAGIC }, 142 { MOUNT_MSDOS, LINUX_MSDOS_SUPER_MAGIC }, 143 { MOUNT_LFS, LINUX_DEFAULT_SUPER_MAGIC }, 144 { MOUNT_FDESC, LINUX_DEFAULT_SUPER_MAGIC }, 145 { MOUNT_PORTAL, LINUX_DEFAULT_SUPER_MAGIC }, 146 { MOUNT_NULL, LINUX_DEFAULT_SUPER_MAGIC }, 147 { MOUNT_OVERLAY, LINUX_DEFAULT_SUPER_MAGIC }, 148 { MOUNT_UMAP, LINUX_DEFAULT_SUPER_MAGIC }, 149 { MOUNT_KERNFS, LINUX_DEFAULT_SUPER_MAGIC }, 150 { MOUNT_PROCFS, LINUX_PROC_SUPER_MAGIC }, 151 { MOUNT_AFS, LINUX_DEFAULT_SUPER_MAGIC }, 152 { MOUNT_CD9660, LINUX_ISOFS_SUPER_MAGIC }, 153 { MOUNT_UNION, LINUX_DEFAULT_SUPER_MAGIC }, 154 { MOUNT_ADOSFS, LINUX_ADFS_SUPER_MAGIC }, 155 { MOUNT_EXT2FS, LINUX_EXT2_SUPER_MAGIC }, 156 { MOUNT_CFS, LINUX_DEFAULT_SUPER_MAGIC }, 157 { MOUNT_CODA, LINUX_CODA_SUPER_MAGIC }, 158 { MOUNT_FILECORE, LINUX_DEFAULT_SUPER_MAGIC }, 159 { MOUNT_NTFS, LINUX_DEFAULT_SUPER_MAGIC }, 160 { MOUNT_SMBFS, LINUX_SMB_SUPER_MAGIC } 161 }; 162 #define FSTYPESSIZE (sizeof(fstypes) / sizeof(fstypes[0])) 163 164 #ifdef DEBUG_LINUX 165 #define DPRINTF(a) uprintf a 166 #else 167 #define DPRINTF(a) 168 #endif 169 170 /* Local linux_misc.c functions: */ 171 static void bsd_to_linux_statfs __P((struct statfs *, struct linux_statfs *)); 172 static int linux_to_bsd_limit __P((int)); 173 static void linux_to_bsd_mmap_args __P((struct sys_mmap_args *, 174 const struct linux_sys_mmap_args *)); 175 176 /* 177 * The information on a terminated (or stopped) process needs 178 * to be converted in order for Linux binaries to get a valid signal 179 * number out of it. 180 */ 181 void 182 bsd_to_linux_wstat(st) 183 int *st; 184 { 185 186 int sig; 187 188 if (WIFSIGNALED(*st)) { 189 sig = WTERMSIG(*st); 190 if (sig >= 0 && sig < NSIG) 191 *st= (*st& ~0177) | native_to_linux_signo[sig]; 192 } else if (WIFSTOPPED(*st)) { 193 sig = WSTOPSIG(*st); 194 if (sig >= 0 && sig < NSIG) 195 *st = (*st & ~0xff00) | 196 (native_to_linux_signo[sig] << 8); 197 } 198 } 199 200 /* 201 * This is very much the same as waitpid() 202 */ 203 int 204 linux_sys_wait4(l, v, retval) 205 struct lwp *l; 206 void *v; 207 register_t *retval; 208 { 209 struct linux_sys_wait4_args /* { 210 syscallarg(int) pid; 211 syscallarg(int *) status; 212 syscallarg(int) options; 213 syscallarg(struct rusage *) rusage; 214 } */ *uap = v; 215 struct proc *p = l->l_proc; 216 struct sys_wait4_args w4a; 217 int error, *status, tstat, options, linux_options; 218 caddr_t sg; 219 220 if (SCARG(uap, status) != NULL) { 221 sg = stackgap_init(p, 0); 222 status = (int *) stackgap_alloc(p, &sg, sizeof *status); 223 } else 224 status = NULL; 225 226 linux_options = SCARG(uap, options); 227 options = 0; 228 if (linux_options & 229 ~(LINUX_WAIT4_WNOHANG|LINUX_WAIT4_WUNTRACED|LINUX_WAIT4_WALL| 230 LINUX_WAIT4_WCLONE)) 231 return (EINVAL); 232 233 if (linux_options & LINUX_WAIT4_WNOHANG) 234 options |= WNOHANG; 235 if (linux_options & LINUX_WAIT4_WUNTRACED) 236 options |= WUNTRACED; 237 if (linux_options & LINUX_WAIT4_WALL) 238 options |= WALLSIG; 239 if (linux_options & LINUX_WAIT4_WCLONE) 240 options |= WALTSIG; 241 242 SCARG(&w4a, pid) = SCARG(uap, pid); 243 SCARG(&w4a, status) = status; 244 SCARG(&w4a, options) = options; 245 SCARG(&w4a, rusage) = SCARG(uap, rusage); 246 247 if ((error = sys_wait4(l, &w4a, retval))) 248 return error; 249 250 sigdelset(&p->p_sigctx.ps_siglist, SIGCHLD); 251 252 if (status != NULL) { 253 if ((error = copyin(status, &tstat, sizeof tstat))) 254 return error; 255 256 bsd_to_linux_wstat(&tstat); 257 return copyout(&tstat, SCARG(uap, status), sizeof tstat); 258 } 259 260 return 0; 261 } 262 263 /* 264 * Linux brk(2). The check if the new address is >= the old one is 265 * done in the kernel in Linux. NetBSD does it in the library. 266 */ 267 int 268 linux_sys_brk(l, v, retval) 269 struct lwp *l; 270 void *v; 271 register_t *retval; 272 { 273 struct linux_sys_brk_args /* { 274 syscallarg(char *) nsize; 275 } */ *uap = v; 276 struct proc *p = l->l_proc; 277 char *nbrk = SCARG(uap, nsize); 278 struct sys_obreak_args oba; 279 struct vmspace *vm = p->p_vmspace; 280 struct linux_emuldata *ed = (struct linux_emuldata*)p->p_emuldata; 281 282 SCARG(&oba, nsize) = nbrk; 283 284 if ((caddr_t) nbrk > vm->vm_daddr && sys_obreak(l, &oba, retval) == 0) 285 ed->p_break = (char*)nbrk; 286 else 287 nbrk = ed->p_break; 288 289 retval[0] = (register_t)nbrk; 290 291 return 0; 292 } 293 294 /* 295 * Convert BSD statfs structure to Linux statfs structure. 296 * The Linux structure has less fields, and it also wants 297 * the length of a name in a dir entry in a field, which 298 * we fake (probably the wrong way). 299 */ 300 static void 301 bsd_to_linux_statfs(bsp, lsp) 302 struct statfs *bsp; 303 struct linux_statfs *lsp; 304 { 305 int i; 306 307 for (i = 0; i < FSTYPESSIZE; i++) 308 if (strcmp(bsp->f_fstypename, fstypes[i].bsd) == 0) 309 break; 310 311 if (i == FSTYPESSIZE) { 312 DPRINTF(("unhandled fstype in linux emulation: %s\n", 313 bsp->f_fstypename)); 314 lsp->l_ftype = LINUX_DEFAULT_SUPER_MAGIC; 315 } else { 316 lsp->l_ftype = fstypes[i].linux; 317 } 318 319 lsp->l_fbsize = bsp->f_bsize; 320 lsp->l_fblocks = bsp->f_blocks; 321 lsp->l_fbfree = bsp->f_bfree; 322 lsp->l_fbavail = bsp->f_bavail; 323 lsp->l_ffiles = bsp->f_files; 324 lsp->l_fffree = bsp->f_ffree; 325 /* Linux sets the fsid to 0..., we don't */ 326 lsp->l_ffsid.val[0] = bsp->f_fsid.val[0]; 327 lsp->l_ffsid.val[1] = bsp->f_fsid.val[1]; 328 lsp->l_fnamelen = MAXNAMLEN; /* XXX */ 329 (void)memset(lsp->l_fspare, 0, sizeof(lsp->l_fspare)); 330 } 331 332 /* 333 * Implement the fs stat functions. Straightforward. 334 */ 335 int 336 linux_sys_statfs(l, v, retval) 337 struct lwp *l; 338 void *v; 339 register_t *retval; 340 { 341 struct linux_sys_statfs_args /* { 342 syscallarg(const char *) path; 343 syscallarg(struct linux_statfs *) sp; 344 } */ *uap = v; 345 struct proc *p = l->l_proc; 346 struct statfs btmp, *bsp; 347 struct linux_statfs ltmp; 348 struct sys_statfs_args bsa; 349 caddr_t sg; 350 int error; 351 352 sg = stackgap_init(p, 0); 353 bsp = (struct statfs *) stackgap_alloc(p, &sg, sizeof (struct statfs)); 354 355 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 356 357 SCARG(&bsa, path) = SCARG(uap, path); 358 SCARG(&bsa, buf) = bsp; 359 360 if ((error = sys_statfs(l, &bsa, retval))) 361 return error; 362 363 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 364 return error; 365 366 bsd_to_linux_statfs(&btmp, <mp); 367 368 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 369 } 370 371 int 372 linux_sys_fstatfs(l, v, retval) 373 struct lwp *l; 374 void *v; 375 register_t *retval; 376 { 377 struct linux_sys_fstatfs_args /* { 378 syscallarg(int) fd; 379 syscallarg(struct linux_statfs *) sp; 380 } */ *uap = v; 381 struct proc *p = l->l_proc; 382 struct statfs btmp, *bsp; 383 struct linux_statfs ltmp; 384 struct sys_fstatfs_args bsa; 385 caddr_t sg; 386 int error; 387 388 sg = stackgap_init(p, 0); 389 bsp = (struct statfs *) stackgap_alloc(p, &sg, sizeof (struct statfs)); 390 391 SCARG(&bsa, fd) = SCARG(uap, fd); 392 SCARG(&bsa, buf) = bsp; 393 394 if ((error = sys_fstatfs(l, &bsa, retval))) 395 return error; 396 397 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 398 return error; 399 400 bsd_to_linux_statfs(&btmp, <mp); 401 402 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 403 } 404 405 /* 406 * uname(). Just copy the info from the various strings stored in the 407 * kernel, and put it in the Linux utsname structure. That structure 408 * is almost the same as the NetBSD one, only it has fields 65 characters 409 * long, and an extra domainname field. 410 */ 411 int 412 linux_sys_uname(l, v, retval) 413 struct lwp *l; 414 void *v; 415 register_t *retval; 416 { 417 struct linux_sys_uname_args /* { 418 syscallarg(struct linux_utsname *) up; 419 } */ *uap = v; 420 struct linux_utsname luts; 421 422 strncpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 423 strncpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 424 strncpy(luts.l_release, linux_release, sizeof(luts.l_release)); 425 strncpy(luts.l_version, linux_version, sizeof(luts.l_version)); 426 strncpy(luts.l_machine, machine, sizeof(luts.l_machine)); 427 strncpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 428 429 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 430 } 431 432 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 433 /* Used indirectly on: arm, i386, m68k */ 434 435 /* 436 * New type Linux mmap call. 437 * Only called directly on machines with >= 6 free regs. 438 */ 439 int 440 linux_sys_mmap(l, v, retval) 441 struct lwp *l; 442 void *v; 443 register_t *retval; 444 { 445 struct linux_sys_mmap_args /* { 446 syscallarg(unsigned long) addr; 447 syscallarg(size_t) len; 448 syscallarg(int) prot; 449 syscallarg(int) flags; 450 syscallarg(int) fd; 451 syscallarg(linux_off_t) offset; 452 } */ *uap = v; 453 struct sys_mmap_args cma; 454 455 if (SCARG(uap, offset) & PAGE_MASK) 456 return EINVAL; 457 458 linux_to_bsd_mmap_args(&cma, uap); 459 SCARG(&cma, pos) = (off_t)SCARG(uap, offset); 460 461 return sys_mmap(l, &cma, retval); 462 } 463 464 /* 465 * Guts of most architectures' mmap64() implementations. This shares 466 * its list of arguments with linux_sys_mmap(). 467 * 468 * The difference in linux_sys_mmap2() is that "offset" is actually 469 * (offset / pagesize), not an absolute byte count. This translation 470 * to pagesize offsets is done inside glibc between the mmap64() call 471 * point, and the actual syscall. 472 */ 473 int 474 linux_sys_mmap2(l, v, retval) 475 struct lwp *l; 476 void *v; 477 register_t *retval; 478 { 479 struct linux_sys_mmap2_args /* { 480 syscallarg(unsigned long) addr; 481 syscallarg(size_t) len; 482 syscallarg(int) prot; 483 syscallarg(int) flags; 484 syscallarg(int) fd; 485 syscallarg(linux_off_t) offset; 486 } */ *uap = v; 487 struct sys_mmap_args cma; 488 489 linux_to_bsd_mmap_args(&cma, uap); 490 SCARG(&cma, pos) = ((off_t)SCARG(uap, offset)) << PAGE_SHIFT; 491 492 return sys_mmap(l, &cma, retval); 493 } 494 495 static void 496 linux_to_bsd_mmap_args(cma, uap) 497 struct sys_mmap_args *cma; 498 const struct linux_sys_mmap_args *uap; 499 { 500 int flags = MAP_TRYFIXED, fl = SCARG(uap, flags); 501 502 flags |= cvtto_bsd_mask(fl, LINUX_MAP_SHARED, MAP_SHARED); 503 flags |= cvtto_bsd_mask(fl, LINUX_MAP_PRIVATE, MAP_PRIVATE); 504 flags |= cvtto_bsd_mask(fl, LINUX_MAP_FIXED, MAP_FIXED); 505 flags |= cvtto_bsd_mask(fl, LINUX_MAP_ANON, MAP_ANON); 506 /* XXX XAX ERH: Any other flags here? There are more defined... */ 507 508 SCARG(cma, addr) = (void *)SCARG(uap, addr); 509 SCARG(cma, len) = SCARG(uap, len); 510 SCARG(cma, prot) = SCARG(uap, prot); 511 if (SCARG(cma, prot) & VM_PROT_WRITE) /* XXX */ 512 SCARG(cma, prot) |= VM_PROT_READ; 513 SCARG(cma, flags) = flags; 514 SCARG(cma, fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 515 SCARG(cma, pad) = 0; 516 } 517 518 int 519 linux_sys_mremap(l, v, retval) 520 struct lwp *l; 521 void *v; 522 register_t *retval; 523 { 524 struct linux_sys_mremap_args /* { 525 syscallarg(void *) old_address; 526 syscallarg(size_t) old_size; 527 syscallarg(size_t) new_size; 528 syscallarg(u_long) flags; 529 } */ *uap = v; 530 struct sys_munmap_args mua; 531 size_t old_size, new_size; 532 int error; 533 534 old_size = round_page(SCARG(uap, old_size)); 535 new_size = round_page(SCARG(uap, new_size)); 536 537 /* 538 * Growing mapped region. 539 */ 540 if (new_size > old_size) { 541 /* 542 * XXX Implement me. What we probably want to do is 543 * XXX dig out the guts of the old mapping, mmap that 544 * XXX object again with the new size, then munmap 545 * XXX the old mapping. 546 */ 547 *retval = 0; 548 return (ENOMEM); 549 } 550 551 /* 552 * Shrinking mapped region. 553 */ 554 if (new_size < old_size) { 555 SCARG(&mua, addr) = (caddr_t)SCARG(uap, old_address) + 556 new_size; 557 SCARG(&mua, len) = old_size - new_size; 558 error = sys_munmap(l, &mua, retval); 559 *retval = error ? 0 : (register_t)SCARG(uap, old_address); 560 return (error); 561 } 562 563 /* 564 * No change. 565 */ 566 *retval = (register_t)SCARG(uap, old_address); 567 return (0); 568 } 569 570 int 571 linux_sys_msync(l, v, retval) 572 struct lwp *l; 573 void *v; 574 register_t *retval; 575 { 576 struct linux_sys_msync_args /* { 577 syscallarg(caddr_t) addr; 578 syscallarg(int) len; 579 syscallarg(int) fl; 580 } */ *uap = v; 581 582 struct sys___msync13_args bma; 583 584 /* flags are ignored */ 585 SCARG(&bma, addr) = SCARG(uap, addr); 586 SCARG(&bma, len) = SCARG(uap, len); 587 SCARG(&bma, flags) = SCARG(uap, fl); 588 589 return sys___msync13(l, &bma, retval); 590 } 591 592 int 593 linux_sys_mprotect(l, v, retval) 594 struct lwp *l; 595 void *v; 596 register_t *retval; 597 { 598 struct linux_sys_mprotect_args /* { 599 syscallarg(const void *) start; 600 syscallarg(unsigned long) len; 601 syscallarg(int) prot; 602 } */ *uap = v; 603 unsigned long end, start = (unsigned long)SCARG(uap, start), len; 604 int prot = SCARG(uap, prot); 605 struct vm_map_entry *entry; 606 struct vm_map *map = &l->l_proc->p_vmspace->vm_map; 607 608 if (start & PAGE_MASK) 609 return EINVAL; 610 611 len = round_page(SCARG(uap, len)); 612 end = start + len; 613 614 if (end < start) 615 return EINVAL; 616 else if (end == start) 617 return 0; 618 619 if (SCARG(uap, prot) & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) 620 return EINVAL; 621 622 vm_map_lock(map); 623 #ifdef notdef 624 VM_MAP_RANGE_CHECK(map, start, end); 625 #endif 626 if (!uvm_map_lookup_entry(map, start, &entry) || entry->start > start) { 627 vm_map_unlock(map); 628 return EFAULT; 629 } 630 vm_map_unlock(map); 631 return uvm_map_protect(map, start, end, prot, FALSE); 632 } 633 634 /* 635 * This code is partly stolen from src/lib/libc/compat-43/times.c 636 */ 637 638 #define CONVTCK(r) (r.tv_sec * hz + r.tv_usec / (1000000 / hz)) 639 640 int 641 linux_sys_times(l, v, retval) 642 struct lwp *l; 643 void *v; 644 register_t *retval; 645 { 646 struct linux_sys_times_args /* { 647 syscallarg(struct times *) tms; 648 } */ *uap = v; 649 struct proc *p = l->l_proc; 650 struct timeval t; 651 int error, s; 652 653 if (SCARG(uap, tms)) { 654 struct linux_tms ltms; 655 struct rusage ru; 656 657 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL); 658 ltms.ltms_utime = CONVTCK(ru.ru_utime); 659 ltms.ltms_stime = CONVTCK(ru.ru_stime); 660 661 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 662 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 663 664 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 665 return error; 666 } 667 668 s = splclock(); 669 timersub(&time, &boottime, &t); 670 splx(s); 671 672 retval[0] = ((linux_clock_t)(CONVTCK(t))); 673 return 0; 674 } 675 676 #undef CONVTCK 677 678 /* 679 * Linux 'readdir' call. This code is mostly taken from the 680 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 681 * an attempt has been made to keep it a little cleaner (failing 682 * miserably, because of the cruft needed if count 1 is passed). 683 * 684 * The d_off field should contain the offset of the next valid entry, 685 * but in Linux it has the offset of the entry itself. We emulate 686 * that bug here. 687 * 688 * Read in BSD-style entries, convert them, and copy them out. 689 * 690 * Note that this doesn't handle union-mounted filesystems. 691 */ 692 int 693 linux_sys_getdents(l, v, retval) 694 struct lwp *l; 695 void *v; 696 register_t *retval; 697 { 698 struct linux_sys_getdents_args /* { 699 syscallarg(int) fd; 700 syscallarg(struct linux_dirent *) dent; 701 syscallarg(unsigned int) count; 702 } */ *uap = v; 703 struct proc *p = l->l_proc; 704 struct dirent *bdp; 705 struct vnode *vp; 706 caddr_t inp, buf; /* BSD-format */ 707 int len, reclen; /* BSD-format */ 708 caddr_t outp; /* Linux-format */ 709 int resid, linux_reclen = 0; /* Linux-format */ 710 struct file *fp; 711 struct uio auio; 712 struct iovec aiov; 713 struct linux_dirent idb; 714 off_t off; /* true file offset */ 715 int buflen, error, eofflag, nbytes, oldcall; 716 struct vattr va; 717 off_t *cookiebuf = NULL, *cookie; 718 int ncookies; 719 720 /* getvnode() will use the descriptor for us */ 721 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 722 return (error); 723 724 if ((fp->f_flag & FREAD) == 0) { 725 error = EBADF; 726 goto out1; 727 } 728 729 vp = (struct vnode *)fp->f_data; 730 if (vp->v_type != VDIR) { 731 error = EINVAL; 732 goto out1; 733 } 734 735 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) 736 goto out1; 737 738 nbytes = SCARG(uap, count); 739 if (nbytes == 1) { /* emulating old, broken behaviour */ 740 nbytes = sizeof (idb); 741 buflen = max(va.va_blocksize, nbytes); 742 oldcall = 1; 743 } else { 744 buflen = min(MAXBSIZE, nbytes); 745 if (buflen < va.va_blocksize) 746 buflen = va.va_blocksize; 747 oldcall = 0; 748 } 749 buf = malloc(buflen, M_TEMP, M_WAITOK); 750 751 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 752 off = fp->f_offset; 753 again: 754 aiov.iov_base = buf; 755 aiov.iov_len = buflen; 756 auio.uio_iov = &aiov; 757 auio.uio_iovcnt = 1; 758 auio.uio_rw = UIO_READ; 759 auio.uio_segflg = UIO_SYSSPACE; 760 auio.uio_procp = p; 761 auio.uio_resid = buflen; 762 auio.uio_offset = off; 763 /* 764 * First we read into the malloc'ed buffer, then 765 * we massage it into user space, one record at a time. 766 */ 767 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 768 &ncookies); 769 if (error) 770 goto out; 771 772 inp = buf; 773 outp = (caddr_t)SCARG(uap, dent); 774 resid = nbytes; 775 if ((len = buflen - auio.uio_resid) == 0) 776 goto eof; 777 778 for (cookie = cookiebuf; len > 0; len -= reclen) { 779 bdp = (struct dirent *)inp; 780 reclen = bdp->d_reclen; 781 if (reclen & 3) 782 panic("linux_readdir"); 783 if (bdp->d_fileno == 0) { 784 inp += reclen; /* it is a hole; squish it out */ 785 off = *cookie++; 786 continue; 787 } 788 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 789 if (reclen > len || resid < linux_reclen) { 790 /* entry too big for buffer, so just stop */ 791 outp++; 792 break; 793 } 794 /* 795 * Massage in place to make a Linux-shaped dirent (otherwise 796 * we have to worry about touching user memory outside of 797 * the copyout() call). 798 */ 799 idb.d_ino = bdp->d_fileno; 800 /* 801 * The old readdir() call misuses the offset and reclen fields. 802 */ 803 if (oldcall) { 804 idb.d_off = (linux_off_t)linux_reclen; 805 idb.d_reclen = (u_short)bdp->d_namlen; 806 } else { 807 if (sizeof (idb.d_off) <= 4 && (off >> 32) != 0) { 808 compat_offseterr(vp, "linux_getdents"); 809 error = EINVAL; 810 goto out; 811 } 812 idb.d_off = (linux_off_t)off; 813 idb.d_reclen = (u_short)linux_reclen; 814 } 815 strcpy(idb.d_name, bdp->d_name); 816 if ((error = copyout((caddr_t)&idb, outp, linux_reclen))) 817 goto out; 818 /* advance past this real entry */ 819 inp += reclen; 820 off = *cookie++; /* each entry points to itself */ 821 /* advance output past Linux-shaped entry */ 822 outp += linux_reclen; 823 resid -= linux_reclen; 824 if (oldcall) 825 break; 826 } 827 828 /* if we squished out the whole block, try again */ 829 if (outp == (caddr_t)SCARG(uap, dent)) 830 goto again; 831 fp->f_offset = off; /* update the vnode offset */ 832 833 if (oldcall) 834 nbytes = resid + linux_reclen; 835 836 eof: 837 *retval = nbytes - resid; 838 out: 839 VOP_UNLOCK(vp, 0); 840 if (cookiebuf) 841 free(cookiebuf, M_TEMP); 842 free(buf, M_TEMP); 843 out1: 844 FILE_UNUSE(fp, p); 845 return error; 846 } 847 848 /* 849 * Even when just using registers to pass arguments to syscalls you can 850 * have 5 of them on the i386. So this newer version of select() does 851 * this. 852 */ 853 int 854 linux_sys_select(l, v, retval) 855 struct lwp *l; 856 void *v; 857 register_t *retval; 858 { 859 struct linux_sys_select_args /* { 860 syscallarg(int) nfds; 861 syscallarg(fd_set *) readfds; 862 syscallarg(fd_set *) writefds; 863 syscallarg(fd_set *) exceptfds; 864 syscallarg(struct timeval *) timeout; 865 } */ *uap = v; 866 867 return linux_select1(l, retval, SCARG(uap, nfds), SCARG(uap, readfds), 868 SCARG(uap, writefds), SCARG(uap, exceptfds), SCARG(uap, timeout)); 869 } 870 871 /* 872 * Common code for the old and new versions of select(). A couple of 873 * things are important: 874 * 1) return the amount of time left in the 'timeout' parameter 875 * 2) select never returns ERESTART on Linux, always return EINTR 876 */ 877 int 878 linux_select1(l, retval, nfds, readfds, writefds, exceptfds, timeout) 879 struct lwp *l; 880 register_t *retval; 881 int nfds; 882 fd_set *readfds, *writefds, *exceptfds; 883 struct timeval *timeout; 884 { 885 struct sys_select_args bsa; 886 struct proc *p = l->l_proc; 887 struct timeval tv0, tv1, utv, *tvp; 888 caddr_t sg; 889 int error; 890 891 SCARG(&bsa, nd) = nfds; 892 SCARG(&bsa, in) = readfds; 893 SCARG(&bsa, ou) = writefds; 894 SCARG(&bsa, ex) = exceptfds; 895 SCARG(&bsa, tv) = timeout; 896 897 /* 898 * Store current time for computation of the amount of 899 * time left. 900 */ 901 if (timeout) { 902 if ((error = copyin(timeout, &utv, sizeof(utv)))) 903 return error; 904 if (itimerfix(&utv)) { 905 /* 906 * The timeval was invalid. Convert it to something 907 * valid that will act as it does under Linux. 908 */ 909 sg = stackgap_init(p, 0); 910 tvp = stackgap_alloc(p, &sg, sizeof(utv)); 911 utv.tv_sec += utv.tv_usec / 1000000; 912 utv.tv_usec %= 1000000; 913 if (utv.tv_usec < 0) { 914 utv.tv_sec -= 1; 915 utv.tv_usec += 1000000; 916 } 917 if (utv.tv_sec < 0) 918 timerclear(&utv); 919 if ((error = copyout(&utv, tvp, sizeof(utv)))) 920 return error; 921 SCARG(&bsa, tv) = tvp; 922 } 923 microtime(&tv0); 924 } 925 926 error = sys_select(l, &bsa, retval); 927 if (error) { 928 /* 929 * See fs/select.c in the Linux kernel. Without this, 930 * Maelstrom doesn't work. 931 */ 932 if (error == ERESTART) 933 error = EINTR; 934 return error; 935 } 936 937 if (timeout) { 938 if (*retval) { 939 /* 940 * Compute how much time was left of the timeout, 941 * by subtracting the current time and the time 942 * before we started the call, and subtracting 943 * that result from the user-supplied value. 944 */ 945 microtime(&tv1); 946 timersub(&tv1, &tv0, &tv1); 947 timersub(&utv, &tv1, &utv); 948 if (utv.tv_sec < 0) 949 timerclear(&utv); 950 } else 951 timerclear(&utv); 952 if ((error = copyout(&utv, timeout, sizeof(utv)))) 953 return error; 954 } 955 956 return 0; 957 } 958 959 /* 960 * Get the process group of a certain process. Look it up 961 * and return the value. 962 */ 963 int 964 linux_sys_getpgid(l, v, retval) 965 struct lwp *l; 966 void *v; 967 register_t *retval; 968 { 969 struct linux_sys_getpgid_args /* { 970 syscallarg(int) pid; 971 } */ *uap = v; 972 struct proc *p = l->l_proc; 973 struct proc *targp; 974 975 if (SCARG(uap, pid) != 0 && SCARG(uap, pid) != p->p_pid) { 976 if ((targp = pfind(SCARG(uap, pid))) == 0) 977 return ESRCH; 978 } 979 else 980 targp = p; 981 982 retval[0] = targp->p_pgid; 983 return 0; 984 } 985 986 /* 987 * Set the 'personality' (emulation mode) for the current process. Only 988 * accept the Linux personality here (0). This call is needed because 989 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 990 * ELF binaries run in Linux mode, not SVR4 mode. 991 */ 992 int 993 linux_sys_personality(l, v, retval) 994 struct lwp *l; 995 void *v; 996 register_t *retval; 997 { 998 struct linux_sys_personality_args /* { 999 syscallarg(int) per; 1000 } */ *uap = v; 1001 1002 if (SCARG(uap, per) != 0) 1003 return EINVAL; 1004 retval[0] = 0; 1005 return 0; 1006 } 1007 1008 #if defined(__i386__) || defined(__m68k__) 1009 /* 1010 * The calls are here because of type conversions. 1011 */ 1012 int 1013 linux_sys_setreuid16(l, v, retval) 1014 struct lwp *l; 1015 void *v; 1016 register_t *retval; 1017 { 1018 struct linux_sys_setreuid16_args /* { 1019 syscallarg(int) ruid; 1020 syscallarg(int) euid; 1021 } */ *uap = v; 1022 struct sys_setreuid_args bsa; 1023 1024 SCARG(&bsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 1025 (uid_t)-1 : SCARG(uap, ruid); 1026 SCARG(&bsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 1027 (uid_t)-1 : SCARG(uap, euid); 1028 1029 return sys_setreuid(l, &bsa, retval); 1030 } 1031 1032 int 1033 linux_sys_setregid16(l, v, retval) 1034 struct lwp *l; 1035 void *v; 1036 register_t *retval; 1037 { 1038 struct linux_sys_setregid16_args /* { 1039 syscallarg(int) rgid; 1040 syscallarg(int) egid; 1041 } */ *uap = v; 1042 struct sys_setregid_args bsa; 1043 1044 SCARG(&bsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 1045 (uid_t)-1 : SCARG(uap, rgid); 1046 SCARG(&bsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 1047 (uid_t)-1 : SCARG(uap, egid); 1048 1049 return sys_setregid(l, &bsa, retval); 1050 } 1051 1052 int 1053 linux_sys_setresuid16(l, v, retval) 1054 struct lwp *l; 1055 void *v; 1056 register_t *retval; 1057 { 1058 struct linux_sys_setresuid16_args /* { 1059 syscallarg(uid_t) ruid; 1060 syscallarg(uid_t) euid; 1061 syscallarg(uid_t) suid; 1062 } */ *uap = v; 1063 struct linux_sys_setresuid16_args lsa; 1064 1065 SCARG(&lsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 1066 (uid_t)-1 : SCARG(uap, ruid); 1067 SCARG(&lsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 1068 (uid_t)-1 : SCARG(uap, euid); 1069 SCARG(&lsa, suid) = ((linux_uid_t)SCARG(uap, suid) == (linux_uid_t)-1) ? 1070 (uid_t)-1 : SCARG(uap, suid); 1071 1072 return linux_sys_setresuid(l, &lsa, retval); 1073 } 1074 1075 int 1076 linux_sys_setresgid16(l, v, retval) 1077 struct lwp *l; 1078 void *v; 1079 register_t *retval; 1080 { 1081 struct linux_sys_setresgid16_args /* { 1082 syscallarg(gid_t) rgid; 1083 syscallarg(gid_t) egid; 1084 syscallarg(gid_t) sgid; 1085 } */ *uap = v; 1086 struct linux_sys_setresgid16_args lsa; 1087 1088 SCARG(&lsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 1089 (gid_t)-1 : SCARG(uap, rgid); 1090 SCARG(&lsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 1091 (gid_t)-1 : SCARG(uap, egid); 1092 SCARG(&lsa, sgid) = ((linux_gid_t)SCARG(uap, sgid) == (linux_gid_t)-1) ? 1093 (gid_t)-1 : SCARG(uap, sgid); 1094 1095 return linux_sys_setresgid(l, &lsa, retval); 1096 } 1097 1098 int 1099 linux_sys_getgroups16(l, v, retval) 1100 struct lwp *l; 1101 void *v; 1102 register_t *retval; 1103 { 1104 struct linux_sys_getgroups16_args /* { 1105 syscallarg(int) gidsetsize; 1106 syscallarg(linux_gid_t *) gidset; 1107 } */ *uap = v; 1108 struct proc *p = l->l_proc; 1109 caddr_t sg; 1110 int n, error, i; 1111 struct sys_getgroups_args bsa; 1112 gid_t *bset, *kbset; 1113 linux_gid_t *lset; 1114 struct pcred *pc = p->p_cred; 1115 1116 n = SCARG(uap, gidsetsize); 1117 if (n < 0) 1118 return EINVAL; 1119 error = 0; 1120 bset = kbset = NULL; 1121 lset = NULL; 1122 if (n > 0) { 1123 n = min(pc->pc_ucred->cr_ngroups, n); 1124 sg = stackgap_init(p, 0); 1125 bset = stackgap_alloc(p, &sg, n * sizeof (gid_t)); 1126 kbset = malloc(n * sizeof (gid_t), M_TEMP, M_WAITOK); 1127 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1128 if (bset == NULL || kbset == NULL || lset == NULL) 1129 return ENOMEM; 1130 SCARG(&bsa, gidsetsize) = n; 1131 SCARG(&bsa, gidset) = bset; 1132 error = sys_getgroups(l, &bsa, retval); 1133 if (error != 0) 1134 goto out; 1135 error = copyin(bset, kbset, n * sizeof (gid_t)); 1136 if (error != 0) 1137 goto out; 1138 for (i = 0; i < n; i++) 1139 lset[i] = (linux_gid_t)kbset[i]; 1140 error = copyout(lset, SCARG(uap, gidset), 1141 n * sizeof (linux_gid_t)); 1142 } else 1143 *retval = pc->pc_ucred->cr_ngroups; 1144 out: 1145 if (kbset != NULL) 1146 free(kbset, M_TEMP); 1147 if (lset != NULL) 1148 free(lset, M_TEMP); 1149 return error; 1150 } 1151 1152 int 1153 linux_sys_setgroups16(l, v, retval) 1154 struct lwp *l; 1155 void *v; 1156 register_t *retval; 1157 { 1158 struct linux_sys_setgroups16_args /* { 1159 syscallarg(int) gidsetsize; 1160 syscallarg(linux_gid_t *) gidset; 1161 } */ *uap = v; 1162 struct proc *p = l->l_proc; 1163 caddr_t sg; 1164 int n; 1165 int error, i; 1166 struct sys_setgroups_args bsa; 1167 gid_t *bset, *kbset; 1168 linux_gid_t *lset; 1169 1170 n = SCARG(uap, gidsetsize); 1171 if (n < 0 || n > NGROUPS) 1172 return EINVAL; 1173 sg = stackgap_init(p, 0); 1174 bset = stackgap_alloc(p, &sg, n * sizeof (gid_t)); 1175 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1176 kbset = malloc(n * sizeof (gid_t), M_TEMP, M_WAITOK); 1177 if (lset == NULL || bset == NULL) 1178 return ENOMEM; 1179 error = copyin(SCARG(uap, gidset), lset, n * sizeof (linux_gid_t)); 1180 if (error != 0) 1181 goto out; 1182 for (i = 0; i < n; i++) 1183 kbset[i] = (gid_t)lset[i]; 1184 error = copyout(kbset, bset, n * sizeof (gid_t)); 1185 if (error != 0) 1186 goto out; 1187 SCARG(&bsa, gidsetsize) = n; 1188 SCARG(&bsa, gidset) = bset; 1189 error = sys_setgroups(l, &bsa, retval); 1190 1191 out: 1192 if (lset != NULL) 1193 free(lset, M_TEMP); 1194 if (kbset != NULL) 1195 free(kbset, M_TEMP); 1196 1197 return error; 1198 } 1199 1200 #endif /* __i386__ || __m68k__ */ 1201 1202 /* 1203 * We have nonexistent fsuid equal to uid. 1204 * If modification is requested, refuse. 1205 */ 1206 int 1207 linux_sys_setfsuid(l, v, retval) 1208 struct lwp *l; 1209 void *v; 1210 register_t *retval; 1211 { 1212 struct linux_sys_setfsuid_args /* { 1213 syscallarg(uid_t) uid; 1214 } */ *uap = v; 1215 struct proc *p = l->l_proc; 1216 uid_t uid; 1217 1218 uid = SCARG(uap, uid); 1219 if (p->p_cred->p_ruid != uid) 1220 return sys_nosys(l, v, retval); 1221 else 1222 return (0); 1223 } 1224 1225 /* XXX XXX XXX */ 1226 #ifndef alpha 1227 int 1228 linux_sys_getfsuid(l, v, retval) 1229 struct lwp *l; 1230 void *v; 1231 register_t *retval; 1232 { 1233 return sys_getuid(l, v, retval); 1234 } 1235 #endif 1236 1237 int 1238 linux_sys_setresuid(l, v, retval) 1239 struct lwp *l; 1240 void *v; 1241 register_t *retval; 1242 { 1243 struct linux_sys_setresuid_args /* { 1244 syscallarg(uid_t) ruid; 1245 syscallarg(uid_t) euid; 1246 syscallarg(uid_t) suid; 1247 } */ *uap = v; 1248 1249 /* 1250 * Note: These checks are a little different than the NetBSD 1251 * setreuid(2) call performs. This precisely follows the 1252 * behavior of the Linux kernel. 1253 */ 1254 1255 return do_setresuid(l, SCARG(uap, ruid), SCARG(uap, euid), 1256 SCARG(uap, suid), 1257 ID_R_EQ_R | ID_R_EQ_E | ID_R_EQ_S | 1258 ID_E_EQ_R | ID_E_EQ_E | ID_E_EQ_S | 1259 ID_S_EQ_R | ID_S_EQ_E | ID_S_EQ_S ); 1260 } 1261 1262 int 1263 linux_sys_getresuid(l, v, retval) 1264 struct lwp *l; 1265 void *v; 1266 register_t *retval; 1267 { 1268 struct linux_sys_getresuid_args /* { 1269 syscallarg(uid_t *) ruid; 1270 syscallarg(uid_t *) euid; 1271 syscallarg(uid_t *) suid; 1272 } */ *uap = v; 1273 struct proc *p = l->l_proc; 1274 struct pcred *pc = p->p_cred; 1275 int error; 1276 1277 /* 1278 * Linux copies these values out to userspace like so: 1279 * 1280 * 1. Copy out ruid. 1281 * 2. If that succeeds, copy out euid. 1282 * 3. If both of those succeed, copy out suid. 1283 */ 1284 if ((error = copyout(&pc->p_ruid, SCARG(uap, ruid), 1285 sizeof(uid_t))) != 0) 1286 return (error); 1287 1288 if ((error = copyout(&pc->pc_ucred->cr_uid, SCARG(uap, euid), 1289 sizeof(uid_t))) != 0) 1290 return (error); 1291 1292 return (copyout(&pc->p_svuid, SCARG(uap, suid), sizeof(uid_t))); 1293 } 1294 1295 int 1296 linux_sys_ptrace(l, v, retval) 1297 struct lwp *l; 1298 void *v; 1299 register_t *retval; 1300 { 1301 struct linux_sys_ptrace_args /* { 1302 i386, m68k, powerpc: T=int 1303 alpha: T=long 1304 syscallarg(T) request; 1305 syscallarg(T) pid; 1306 syscallarg(T) addr; 1307 syscallarg(T) data; 1308 } */ *uap = v; 1309 const int *ptr; 1310 int request; 1311 int error; 1312 1313 ptr = linux_ptrace_request_map; 1314 request = SCARG(uap, request); 1315 while (*ptr != -1) 1316 if (*ptr++ == request) { 1317 struct sys_ptrace_args pta; 1318 1319 SCARG(&pta, req) = *ptr; 1320 SCARG(&pta, pid) = SCARG(uap, pid); 1321 SCARG(&pta, addr) = (caddr_t)SCARG(uap, addr); 1322 SCARG(&pta, data) = SCARG(uap, data); 1323 1324 /* 1325 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1326 * to continue where the process left off previously. 1327 * The same thing is achieved by addr == (caddr_t) 1 1328 * on NetBSD, so rewrite 'addr' appropriately. 1329 */ 1330 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1331 SCARG(&pta, addr) = (caddr_t) 1; 1332 1333 error = sys_ptrace(l, &pta, retval); 1334 if (error) 1335 return error; 1336 switch (request) { 1337 case LINUX_PTRACE_PEEKTEXT: 1338 case LINUX_PTRACE_PEEKDATA: 1339 error = copyout (retval, 1340 (caddr_t)SCARG(uap, data), sizeof *retval); 1341 *retval = SCARG(uap, data); 1342 break; 1343 default: 1344 break; 1345 } 1346 return error; 1347 } 1348 else 1349 ptr++; 1350 1351 return LINUX_SYS_PTRACE_ARCH(l, uap, retval); 1352 } 1353 1354 int 1355 linux_sys_reboot(struct lwp *l, void *v, register_t *retval) 1356 { 1357 struct linux_sys_reboot_args /* { 1358 syscallarg(int) magic1; 1359 syscallarg(int) magic2; 1360 syscallarg(int) cmd; 1361 syscallarg(void *) arg; 1362 } */ *uap = v; 1363 struct sys_reboot_args /* { 1364 syscallarg(int) opt; 1365 syscallarg(char *) bootstr; 1366 } */ sra; 1367 struct proc *p = l->l_proc; 1368 int error; 1369 1370 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1371 return(error); 1372 1373 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1374 return(EINVAL); 1375 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1376 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1377 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1378 return(EINVAL); 1379 1380 switch (SCARG(uap, cmd)) { 1381 case LINUX_REBOOT_CMD_RESTART: 1382 SCARG(&sra, opt) = RB_AUTOBOOT; 1383 break; 1384 case LINUX_REBOOT_CMD_HALT: 1385 SCARG(&sra, opt) = RB_HALT; 1386 break; 1387 case LINUX_REBOOT_CMD_POWER_OFF: 1388 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1389 break; 1390 case LINUX_REBOOT_CMD_RESTART2: 1391 /* Reboot with an argument. */ 1392 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1393 SCARG(&sra, bootstr) = SCARG(uap, arg); 1394 break; 1395 case LINUX_REBOOT_CMD_CAD_ON: 1396 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1397 case LINUX_REBOOT_CMD_CAD_OFF: 1398 return(0); 1399 default: 1400 return(EINVAL); 1401 } 1402 1403 return(sys_reboot(l, &sra, retval)); 1404 } 1405 1406 /* 1407 * Copy of compat_12_sys_swapon(). 1408 */ 1409 int 1410 linux_sys_swapon(l, v, retval) 1411 struct lwp *l; 1412 void *v; 1413 register_t *retval; 1414 { 1415 struct sys_swapctl_args ua; 1416 struct linux_sys_swapon_args /* { 1417 syscallarg(const char *) name; 1418 } */ *uap = v; 1419 1420 SCARG(&ua, cmd) = SWAP_ON; 1421 SCARG(&ua, arg) = (void *)SCARG(uap, name); 1422 SCARG(&ua, misc) = 0; /* priority */ 1423 return (sys_swapctl(l, &ua, retval)); 1424 } 1425 1426 /* 1427 * Stop swapping to the file or block device specified by path. 1428 */ 1429 int 1430 linux_sys_swapoff(l, v, retval) 1431 struct lwp *l; 1432 void *v; 1433 register_t *retval; 1434 { 1435 struct sys_swapctl_args ua; 1436 struct linux_sys_swapoff_args /* { 1437 syscallarg(const char *) path; 1438 } */ *uap = v; 1439 1440 SCARG(&ua, cmd) = SWAP_OFF; 1441 SCARG(&ua, arg) = (void *)SCARG(uap, path); 1442 return (sys_swapctl(l, &ua, retval)); 1443 } 1444 1445 /* 1446 * Copy of compat_09_sys_setdomainname() 1447 */ 1448 /* ARGSUSED */ 1449 int 1450 linux_sys_setdomainname(l, v, retval) 1451 struct lwp *l; 1452 void *v; 1453 register_t *retval; 1454 { 1455 struct linux_sys_setdomainname_args /* { 1456 syscallarg(char *) domainname; 1457 syscallarg(int) len; 1458 } */ *uap = v; 1459 struct proc *p = l->l_proc; 1460 int name; 1461 int error; 1462 1463 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1464 return (error); 1465 name = KERN_DOMAINNAME; 1466 return (kern_sysctl(&name, 1, 0, 0, SCARG(uap, domainname), 1467 SCARG(uap, len), p)); 1468 } 1469 1470 /* 1471 * sysinfo() 1472 */ 1473 /* ARGSUSED */ 1474 int 1475 linux_sys_sysinfo(l, v, retval) 1476 struct lwp *l; 1477 void *v; 1478 register_t *retval; 1479 { 1480 struct linux_sys_sysinfo_args /* { 1481 syscallarg(struct linux_sysinfo *) arg; 1482 } */ *uap = v; 1483 struct linux_sysinfo si; 1484 struct loadavg *la; 1485 1486 si.uptime = time.tv_sec - boottime.tv_sec; 1487 la = &averunnable; 1488 si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1489 si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1490 si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1491 si.totalram = ctob(physmem); 1492 si.freeram = uvmexp.free * uvmexp.pagesize; 1493 si.sharedram = 0; /* XXX */ 1494 si.bufferram = uvmexp.filepages * uvmexp.pagesize; 1495 si.totalswap = uvmexp.swpages * uvmexp.pagesize; 1496 si.freeswap = (uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize; 1497 si.procs = nprocs; 1498 1499 /* The following are only present in newer Linux kernels. */ 1500 si.totalbig = 0; 1501 si.freebig = 0; 1502 si.mem_unit = 1; 1503 1504 return (copyout(&si, SCARG(uap, arg), sizeof si)); 1505 } 1506 1507 #define bsd_to_linux_rlimit1(l, b, f) \ 1508 (l)->f = ((b)->f == RLIM_INFINITY || \ 1509 ((b)->f & 0xffffffff00000000ULL) != 0) ? \ 1510 LINUX_RLIM_INFINITY : (int32_t)(b)->f 1511 #define bsd_to_linux_rlimit(l, b) \ 1512 bsd_to_linux_rlimit1(l, b, rlim_cur); \ 1513 bsd_to_linux_rlimit1(l, b, rlim_max) 1514 1515 #define linux_to_bsd_rlimit1(b, l, f) \ 1516 (b)->f = (l)->f == LINUX_RLIM_INFINITY ? RLIM_INFINITY : (l)->f 1517 #define linux_to_bsd_rlimit(b, l) \ 1518 linux_to_bsd_rlimit1(b, l, rlim_cur); \ 1519 linux_to_bsd_rlimit1(b, l, rlim_max) 1520 1521 static int 1522 linux_to_bsd_limit(lim) 1523 int lim; 1524 { 1525 switch (lim) { 1526 case LINUX_RLIMIT_CPU: 1527 return RLIMIT_CPU; 1528 case LINUX_RLIMIT_FSIZE: 1529 return RLIMIT_FSIZE; 1530 case LINUX_RLIMIT_DATA: 1531 return RLIMIT_DATA; 1532 case LINUX_RLIMIT_STACK: 1533 return RLIMIT_STACK; 1534 case LINUX_RLIMIT_CORE: 1535 return RLIMIT_CORE; 1536 case LINUX_RLIMIT_RSS: 1537 return RLIMIT_RSS; 1538 case LINUX_RLIMIT_NPROC: 1539 return RLIMIT_NPROC; 1540 case LINUX_RLIMIT_NOFILE: 1541 return RLIMIT_NOFILE; 1542 case LINUX_RLIMIT_MEMLOCK: 1543 return RLIMIT_MEMLOCK; 1544 case LINUX_RLIMIT_AS: 1545 case LINUX_RLIMIT_LOCKS: 1546 return -EOPNOTSUPP; 1547 default: 1548 return -EINVAL; 1549 } 1550 } 1551 1552 1553 int 1554 linux_sys_getrlimit(l, v, retval) 1555 struct lwp *l; 1556 void *v; 1557 register_t *retval; 1558 { 1559 struct linux_sys_getrlimit_args /* { 1560 syscallarg(int) which; 1561 syscallarg(struct orlimit *) rlp; 1562 } */ *uap = v; 1563 struct proc *p = l->l_proc; 1564 caddr_t sg = stackgap_init(p, 0); 1565 struct sys_getrlimit_args ap; 1566 struct rlimit rl; 1567 struct orlimit orl; 1568 int error; 1569 1570 SCARG(&ap, which) = linux_to_bsd_limit(SCARG(uap, which)); 1571 if ((error = SCARG(&ap, which)) < 0) 1572 return -error; 1573 SCARG(&ap, rlp) = stackgap_alloc(p, &sg, sizeof rl); 1574 if ((error = sys_getrlimit(l, &ap, retval)) != 0) 1575 return error; 1576 if ((error = copyin(SCARG(&ap, rlp), &rl, sizeof(rl))) != 0) 1577 return error; 1578 bsd_to_linux_rlimit(&orl, &rl); 1579 return copyout(&orl, SCARG(uap, rlp), sizeof(orl)); 1580 } 1581 1582 int 1583 linux_sys_setrlimit(l, v, retval) 1584 struct lwp *l; 1585 void *v; 1586 register_t *retval; 1587 { 1588 struct linux_sys_setrlimit_args /* { 1589 syscallarg(int) which; 1590 syscallarg(struct orlimit *) rlp; 1591 } */ *uap = v; 1592 struct proc *p = l->l_proc; 1593 caddr_t sg = stackgap_init(p, 0); 1594 struct sys_setrlimit_args ap; 1595 struct rlimit rl; 1596 struct orlimit orl; 1597 int error; 1598 1599 SCARG(&ap, which) = linux_to_bsd_limit(SCARG(uap, which)); 1600 SCARG(&ap, rlp) = stackgap_alloc(p, &sg, sizeof rl); 1601 if ((error = SCARG(&ap, which)) < 0) 1602 return -error; 1603 if ((error = copyin(SCARG(uap, rlp), &orl, sizeof(orl))) != 0) 1604 return error; 1605 linux_to_bsd_rlimit(&rl, &orl); 1606 /* XXX: alpha complains about this */ 1607 if ((error = copyout(&rl, (void *)SCARG(&ap, rlp), sizeof(rl))) != 0) 1608 return error; 1609 return sys_setrlimit(l, &ap, retval); 1610 } 1611 1612 #ifndef __mips__ 1613 /* XXX: this doesn't look 100% common, at least mips doesn't have it */ 1614 int 1615 linux_sys_ugetrlimit(l, v, retval) 1616 struct lwp *l; 1617 void *v; 1618 register_t *retval; 1619 { 1620 return linux_sys_getrlimit(l, v, retval); 1621 } 1622 #endif 1623 1624 /* 1625 * This gets called for unsupported syscalls. The difference to sys_nosys() 1626 * is that process does not get SIGSYS, the call just returns with ENOSYS. 1627 * This is the way Linux does it and glibc depends on this behaviour. 1628 */ 1629 int 1630 linux_sys_nosys(l, v, retval) 1631 struct lwp *l; 1632 void *v; 1633 register_t *retval; 1634 { 1635 return (ENOSYS); 1636 } 1637