1 /* $NetBSD: linux_misc.c,v 1.125 2004/04/21 02:37:20 christos 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 1.125 2004/04/21 02:37:20 christos 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((const struct statvfs *, 172 struct linux_statfs *)); 173 static int linux_to_bsd_limit __P((int)); 174 static void linux_to_bsd_mmap_args __P((struct sys_mmap_args *, 175 const struct linux_sys_mmap_args *)); 176 177 /* 178 * The information on a terminated (or stopped) process needs 179 * to be converted in order for Linux binaries to get a valid signal 180 * number out of it. 181 */ 182 void 183 bsd_to_linux_wstat(st) 184 int *st; 185 { 186 187 int sig; 188 189 if (WIFSIGNALED(*st)) { 190 sig = WTERMSIG(*st); 191 if (sig >= 0 && sig < NSIG) 192 *st= (*st& ~0177) | native_to_linux_signo[sig]; 193 } else if (WIFSTOPPED(*st)) { 194 sig = WSTOPSIG(*st); 195 if (sig >= 0 && sig < NSIG) 196 *st = (*st & ~0xff00) | 197 (native_to_linux_signo[sig] << 8); 198 } 199 } 200 201 /* 202 * This is very much the same as waitpid() 203 */ 204 int 205 linux_sys_wait4(l, v, retval) 206 struct lwp *l; 207 void *v; 208 register_t *retval; 209 { 210 struct linux_sys_wait4_args /* { 211 syscallarg(int) pid; 212 syscallarg(int *) status; 213 syscallarg(int) options; 214 syscallarg(struct rusage *) rusage; 215 } */ *uap = v; 216 struct proc *p = l->l_proc; 217 struct sys_wait4_args w4a; 218 int error, *status, tstat, options, linux_options; 219 caddr_t sg; 220 221 if (SCARG(uap, status) != NULL) { 222 sg = stackgap_init(p, 0); 223 status = (int *) stackgap_alloc(p, &sg, sizeof *status); 224 } else 225 status = NULL; 226 227 linux_options = SCARG(uap, options); 228 options = 0; 229 if (linux_options & 230 ~(LINUX_WAIT4_WNOHANG|LINUX_WAIT4_WUNTRACED|LINUX_WAIT4_WALL| 231 LINUX_WAIT4_WCLONE)) 232 return (EINVAL); 233 234 if (linux_options & LINUX_WAIT4_WNOHANG) 235 options |= WNOHANG; 236 if (linux_options & LINUX_WAIT4_WUNTRACED) 237 options |= WUNTRACED; 238 if (linux_options & LINUX_WAIT4_WALL) 239 options |= WALLSIG; 240 if (linux_options & LINUX_WAIT4_WCLONE) 241 options |= WALTSIG; 242 243 SCARG(&w4a, pid) = SCARG(uap, pid); 244 SCARG(&w4a, status) = status; 245 SCARG(&w4a, options) = options; 246 SCARG(&w4a, rusage) = SCARG(uap, rusage); 247 248 if ((error = sys_wait4(l, &w4a, retval))) 249 return error; 250 251 sigdelset(&p->p_sigctx.ps_siglist, SIGCHLD); 252 253 if (status != NULL) { 254 if ((error = copyin(status, &tstat, sizeof tstat))) 255 return error; 256 257 bsd_to_linux_wstat(&tstat); 258 return copyout(&tstat, SCARG(uap, status), sizeof tstat); 259 } 260 261 return 0; 262 } 263 264 /* 265 * Linux brk(2). The check if the new address is >= the old one is 266 * done in the kernel in Linux. NetBSD does it in the library. 267 */ 268 int 269 linux_sys_brk(l, v, retval) 270 struct lwp *l; 271 void *v; 272 register_t *retval; 273 { 274 struct linux_sys_brk_args /* { 275 syscallarg(char *) nsize; 276 } */ *uap = v; 277 struct proc *p = l->l_proc; 278 char *nbrk = SCARG(uap, nsize); 279 struct sys_obreak_args oba; 280 struct vmspace *vm = p->p_vmspace; 281 struct linux_emuldata *ed = (struct linux_emuldata*)p->p_emuldata; 282 283 SCARG(&oba, nsize) = nbrk; 284 285 if ((caddr_t) nbrk > vm->vm_daddr && sys_obreak(l, &oba, retval) == 0) 286 ed->p_break = (char*)nbrk; 287 else 288 nbrk = ed->p_break; 289 290 retval[0] = (register_t)nbrk; 291 292 return 0; 293 } 294 295 /* 296 * Convert BSD statfs structure to Linux statfs structure. 297 * The Linux structure has less fields, and it also wants 298 * the length of a name in a dir entry in a field, which 299 * we fake (probably the wrong way). 300 */ 301 static void 302 bsd_to_linux_statfs(bsp, lsp) 303 const struct statvfs *bsp; 304 struct linux_statfs *lsp; 305 { 306 int i; 307 308 for (i = 0; i < FSTYPESSIZE; i++) 309 if (strcmp(bsp->f_fstypename, fstypes[i].bsd) == 0) 310 break; 311 312 if (i == FSTYPESSIZE) { 313 DPRINTF(("unhandled fstype in linux emulation: %s\n", 314 bsp->f_fstypename)); 315 lsp->l_ftype = LINUX_DEFAULT_SUPER_MAGIC; 316 } else { 317 lsp->l_ftype = fstypes[i].linux; 318 } 319 320 lsp->l_fbsize = bsp->f_bsize; 321 lsp->l_fblocks = bsp->f_blocks; 322 lsp->l_fbfree = bsp->f_bfree; 323 lsp->l_fbavail = bsp->f_bavail; 324 lsp->l_ffiles = bsp->f_files; 325 lsp->l_fffree = bsp->f_ffree; 326 /* Linux sets the fsid to 0..., we don't */ 327 lsp->l_ffsid.val[0] = bsp->f_fsidx.__fsid_val[0]; 328 lsp->l_ffsid.val[1] = bsp->f_fsidx.__fsid_val[1]; 329 lsp->l_fnamelen = MAXNAMLEN; /* XXX */ 330 (void)memset(lsp->l_fspare, 0, sizeof(lsp->l_fspare)); 331 } 332 333 /* 334 * Implement the fs stat functions. Straightforward. 335 */ 336 int 337 linux_sys_statfs(l, v, retval) 338 struct lwp *l; 339 void *v; 340 register_t *retval; 341 { 342 struct linux_sys_statfs_args /* { 343 syscallarg(const char *) path; 344 syscallarg(struct linux_statfs *) sp; 345 } */ *uap = v; 346 struct proc *p = l->l_proc; 347 struct statvfs btmp, *bsp; 348 struct linux_statfs ltmp; 349 struct sys_statvfs1_args bsa; 350 caddr_t sg; 351 int error; 352 353 sg = stackgap_init(p, 0); 354 bsp = (struct statvfs *) stackgap_alloc(p, &sg, sizeof (struct statvfs)); 355 356 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 357 358 SCARG(&bsa, path) = SCARG(uap, path); 359 SCARG(&bsa, buf) = bsp; 360 SCARG(&bsa, flags) = ST_WAIT; 361 362 if ((error = sys_statvfs1(l, &bsa, retval))) 363 return error; 364 365 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 366 return error; 367 368 bsd_to_linux_statfs(&btmp, <mp); 369 370 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 371 } 372 373 int 374 linux_sys_fstatfs(l, v, retval) 375 struct lwp *l; 376 void *v; 377 register_t *retval; 378 { 379 struct linux_sys_fstatfs_args /* { 380 syscallarg(int) fd; 381 syscallarg(struct linux_statfs *) sp; 382 } */ *uap = v; 383 struct proc *p = l->l_proc; 384 struct statvfs btmp, *bsp; 385 struct linux_statfs ltmp; 386 struct sys_fstatvfs1_args bsa; 387 caddr_t sg; 388 int error; 389 390 sg = stackgap_init(p, 0); 391 bsp = (struct statvfs *) stackgap_alloc(p, &sg, sizeof (struct statvfs)); 392 393 SCARG(&bsa, fd) = SCARG(uap, fd); 394 SCARG(&bsa, buf) = bsp; 395 SCARG(&bsa, flags) = ST_WAIT; 396 397 if ((error = sys_fstatvfs1(l, &bsa, retval))) 398 return error; 399 400 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 401 return error; 402 403 bsd_to_linux_statfs(&btmp, <mp); 404 405 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 406 } 407 408 /* 409 * uname(). Just copy the info from the various strings stored in the 410 * kernel, and put it in the Linux utsname structure. That structure 411 * is almost the same as the NetBSD one, only it has fields 65 characters 412 * long, and an extra domainname field. 413 */ 414 int 415 linux_sys_uname(l, v, retval) 416 struct lwp *l; 417 void *v; 418 register_t *retval; 419 { 420 struct linux_sys_uname_args /* { 421 syscallarg(struct linux_utsname *) up; 422 } */ *uap = v; 423 struct linux_utsname luts; 424 425 strncpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 426 strncpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 427 strncpy(luts.l_release, linux_release, sizeof(luts.l_release)); 428 strncpy(luts.l_version, linux_version, sizeof(luts.l_version)); 429 strncpy(luts.l_machine, machine, sizeof(luts.l_machine)); 430 strncpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 431 432 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 433 } 434 435 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 436 /* Used indirectly on: arm, i386, m68k */ 437 438 /* 439 * New type Linux mmap call. 440 * Only called directly on machines with >= 6 free regs. 441 */ 442 int 443 linux_sys_mmap(l, v, retval) 444 struct lwp *l; 445 void *v; 446 register_t *retval; 447 { 448 struct linux_sys_mmap_args /* { 449 syscallarg(unsigned long) addr; 450 syscallarg(size_t) len; 451 syscallarg(int) prot; 452 syscallarg(int) flags; 453 syscallarg(int) fd; 454 syscallarg(linux_off_t) offset; 455 } */ *uap = v; 456 struct sys_mmap_args cma; 457 458 if (SCARG(uap, offset) & PAGE_MASK) 459 return EINVAL; 460 461 linux_to_bsd_mmap_args(&cma, uap); 462 SCARG(&cma, pos) = (off_t)SCARG(uap, offset); 463 464 return sys_mmap(l, &cma, retval); 465 } 466 467 /* 468 * Guts of most architectures' mmap64() implementations. This shares 469 * its list of arguments with linux_sys_mmap(). 470 * 471 * The difference in linux_sys_mmap2() is that "offset" is actually 472 * (offset / pagesize), not an absolute byte count. This translation 473 * to pagesize offsets is done inside glibc between the mmap64() call 474 * point, and the actual syscall. 475 */ 476 int 477 linux_sys_mmap2(l, v, retval) 478 struct lwp *l; 479 void *v; 480 register_t *retval; 481 { 482 struct linux_sys_mmap2_args /* { 483 syscallarg(unsigned long) addr; 484 syscallarg(size_t) len; 485 syscallarg(int) prot; 486 syscallarg(int) flags; 487 syscallarg(int) fd; 488 syscallarg(linux_off_t) offset; 489 } */ *uap = v; 490 struct sys_mmap_args cma; 491 492 linux_to_bsd_mmap_args(&cma, uap); 493 SCARG(&cma, pos) = ((off_t)SCARG(uap, offset)) << PAGE_SHIFT; 494 495 return sys_mmap(l, &cma, retval); 496 } 497 498 static void 499 linux_to_bsd_mmap_args(cma, uap) 500 struct sys_mmap_args *cma; 501 const struct linux_sys_mmap_args *uap; 502 { 503 int flags = MAP_TRYFIXED, fl = SCARG(uap, flags); 504 505 flags |= cvtto_bsd_mask(fl, LINUX_MAP_SHARED, MAP_SHARED); 506 flags |= cvtto_bsd_mask(fl, LINUX_MAP_PRIVATE, MAP_PRIVATE); 507 flags |= cvtto_bsd_mask(fl, LINUX_MAP_FIXED, MAP_FIXED); 508 flags |= cvtto_bsd_mask(fl, LINUX_MAP_ANON, MAP_ANON); 509 /* XXX XAX ERH: Any other flags here? There are more defined... */ 510 511 SCARG(cma, addr) = (void *)SCARG(uap, addr); 512 SCARG(cma, len) = SCARG(uap, len); 513 SCARG(cma, prot) = SCARG(uap, prot); 514 if (SCARG(cma, prot) & VM_PROT_WRITE) /* XXX */ 515 SCARG(cma, prot) |= VM_PROT_READ; 516 SCARG(cma, flags) = flags; 517 SCARG(cma, fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 518 SCARG(cma, pad) = 0; 519 } 520 521 int 522 linux_sys_mremap(l, v, retval) 523 struct lwp *l; 524 void *v; 525 register_t *retval; 526 { 527 struct linux_sys_mremap_args /* { 528 syscallarg(void *) old_address; 529 syscallarg(size_t) old_size; 530 syscallarg(size_t) new_size; 531 syscallarg(u_long) flags; 532 } */ *uap = v; 533 struct sys_munmap_args mua; 534 size_t old_size, new_size; 535 int error; 536 537 old_size = round_page(SCARG(uap, old_size)); 538 new_size = round_page(SCARG(uap, new_size)); 539 540 /* 541 * Growing mapped region. 542 */ 543 if (new_size > old_size) { 544 /* 545 * XXX Implement me. What we probably want to do is 546 * XXX dig out the guts of the old mapping, mmap that 547 * XXX object again with the new size, then munmap 548 * XXX the old mapping. 549 */ 550 *retval = 0; 551 return (ENOMEM); 552 } 553 554 /* 555 * Shrinking mapped region. 556 */ 557 if (new_size < old_size) { 558 SCARG(&mua, addr) = (caddr_t)SCARG(uap, old_address) + 559 new_size; 560 SCARG(&mua, len) = old_size - new_size; 561 error = sys_munmap(l, &mua, retval); 562 *retval = error ? 0 : (register_t)SCARG(uap, old_address); 563 return (error); 564 } 565 566 /* 567 * No change. 568 */ 569 *retval = (register_t)SCARG(uap, old_address); 570 return (0); 571 } 572 573 int 574 linux_sys_msync(l, v, retval) 575 struct lwp *l; 576 void *v; 577 register_t *retval; 578 { 579 struct linux_sys_msync_args /* { 580 syscallarg(caddr_t) addr; 581 syscallarg(int) len; 582 syscallarg(int) fl; 583 } */ *uap = v; 584 585 struct sys___msync13_args bma; 586 587 /* flags are ignored */ 588 SCARG(&bma, addr) = SCARG(uap, addr); 589 SCARG(&bma, len) = SCARG(uap, len); 590 SCARG(&bma, flags) = SCARG(uap, fl); 591 592 return sys___msync13(l, &bma, retval); 593 } 594 595 int 596 linux_sys_mprotect(l, v, retval) 597 struct lwp *l; 598 void *v; 599 register_t *retval; 600 { 601 struct linux_sys_mprotect_args /* { 602 syscallarg(const void *) start; 603 syscallarg(unsigned long) len; 604 syscallarg(int) prot; 605 } */ *uap = v; 606 unsigned long end, start = (unsigned long)SCARG(uap, start), len; 607 int prot = SCARG(uap, prot); 608 struct vm_map_entry *entry; 609 struct vm_map *map = &l->l_proc->p_vmspace->vm_map; 610 611 if (start & PAGE_MASK) 612 return EINVAL; 613 614 len = round_page(SCARG(uap, len)); 615 end = start + len; 616 617 if (end < start) 618 return EINVAL; 619 else if (end == start) 620 return 0; 621 622 if (SCARG(uap, prot) & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) 623 return EINVAL; 624 625 vm_map_lock(map); 626 #ifdef notdef 627 VM_MAP_RANGE_CHECK(map, start, end); 628 #endif 629 if (!uvm_map_lookup_entry(map, start, &entry) || entry->start > start) { 630 vm_map_unlock(map); 631 return EFAULT; 632 } 633 vm_map_unlock(map); 634 return uvm_map_protect(map, start, end, prot, FALSE); 635 } 636 637 /* 638 * This code is partly stolen from src/lib/libc/compat-43/times.c 639 */ 640 641 #define CONVTCK(r) (r.tv_sec * hz + r.tv_usec / (1000000 / hz)) 642 643 int 644 linux_sys_times(l, v, retval) 645 struct lwp *l; 646 void *v; 647 register_t *retval; 648 { 649 struct linux_sys_times_args /* { 650 syscallarg(struct times *) tms; 651 } */ *uap = v; 652 struct proc *p = l->l_proc; 653 struct timeval t; 654 int error, s; 655 656 if (SCARG(uap, tms)) { 657 struct linux_tms ltms; 658 struct rusage ru; 659 660 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL); 661 ltms.ltms_utime = CONVTCK(ru.ru_utime); 662 ltms.ltms_stime = CONVTCK(ru.ru_stime); 663 664 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 665 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 666 667 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 668 return error; 669 } 670 671 s = splclock(); 672 timersub(&time, &boottime, &t); 673 splx(s); 674 675 retval[0] = ((linux_clock_t)(CONVTCK(t))); 676 return 0; 677 } 678 679 #undef CONVTCK 680 681 /* 682 * Linux 'readdir' call. This code is mostly taken from the 683 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 684 * an attempt has been made to keep it a little cleaner (failing 685 * miserably, because of the cruft needed if count 1 is passed). 686 * 687 * The d_off field should contain the offset of the next valid entry, 688 * but in Linux it has the offset of the entry itself. We emulate 689 * that bug here. 690 * 691 * Read in BSD-style entries, convert them, and copy them out. 692 * 693 * Note that this doesn't handle union-mounted filesystems. 694 */ 695 int 696 linux_sys_getdents(l, v, retval) 697 struct lwp *l; 698 void *v; 699 register_t *retval; 700 { 701 struct linux_sys_getdents_args /* { 702 syscallarg(int) fd; 703 syscallarg(struct linux_dirent *) dent; 704 syscallarg(unsigned int) count; 705 } */ *uap = v; 706 struct proc *p = l->l_proc; 707 struct dirent *bdp; 708 struct vnode *vp; 709 caddr_t inp, buf; /* BSD-format */ 710 int len, reclen; /* BSD-format */ 711 caddr_t outp; /* Linux-format */ 712 int resid, linux_reclen = 0; /* Linux-format */ 713 struct file *fp; 714 struct uio auio; 715 struct iovec aiov; 716 struct linux_dirent idb; 717 off_t off; /* true file offset */ 718 int buflen, error, eofflag, nbytes, oldcall; 719 struct vattr va; 720 off_t *cookiebuf = NULL, *cookie; 721 int ncookies; 722 723 /* getvnode() will use the descriptor for us */ 724 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 725 return (error); 726 727 if ((fp->f_flag & FREAD) == 0) { 728 error = EBADF; 729 goto out1; 730 } 731 732 vp = (struct vnode *)fp->f_data; 733 if (vp->v_type != VDIR) { 734 error = EINVAL; 735 goto out1; 736 } 737 738 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) 739 goto out1; 740 741 nbytes = SCARG(uap, count); 742 if (nbytes == 1) { /* emulating old, broken behaviour */ 743 nbytes = sizeof (idb); 744 buflen = max(va.va_blocksize, nbytes); 745 oldcall = 1; 746 } else { 747 buflen = min(MAXBSIZE, nbytes); 748 if (buflen < va.va_blocksize) 749 buflen = va.va_blocksize; 750 oldcall = 0; 751 } 752 buf = malloc(buflen, M_TEMP, M_WAITOK); 753 754 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 755 off = fp->f_offset; 756 again: 757 aiov.iov_base = buf; 758 aiov.iov_len = buflen; 759 auio.uio_iov = &aiov; 760 auio.uio_iovcnt = 1; 761 auio.uio_rw = UIO_READ; 762 auio.uio_segflg = UIO_SYSSPACE; 763 auio.uio_procp = p; 764 auio.uio_resid = buflen; 765 auio.uio_offset = off; 766 /* 767 * First we read into the malloc'ed buffer, then 768 * we massage it into user space, one record at a time. 769 */ 770 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 771 &ncookies); 772 if (error) 773 goto out; 774 775 inp = buf; 776 outp = (caddr_t)SCARG(uap, dent); 777 resid = nbytes; 778 if ((len = buflen - auio.uio_resid) == 0) 779 goto eof; 780 781 for (cookie = cookiebuf; len > 0; len -= reclen) { 782 bdp = (struct dirent *)inp; 783 reclen = bdp->d_reclen; 784 if (reclen & 3) 785 panic("linux_readdir"); 786 if (bdp->d_fileno == 0) { 787 inp += reclen; /* it is a hole; squish it out */ 788 off = *cookie++; 789 continue; 790 } 791 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 792 if (reclen > len || resid < linux_reclen) { 793 /* entry too big for buffer, so just stop */ 794 outp++; 795 break; 796 } 797 /* 798 * Massage in place to make a Linux-shaped dirent (otherwise 799 * we have to worry about touching user memory outside of 800 * the copyout() call). 801 */ 802 idb.d_ino = bdp->d_fileno; 803 /* 804 * The old readdir() call misuses the offset and reclen fields. 805 */ 806 if (oldcall) { 807 idb.d_off = (linux_off_t)linux_reclen; 808 idb.d_reclen = (u_short)bdp->d_namlen; 809 } else { 810 if (sizeof (idb.d_off) <= 4 && (off >> 32) != 0) { 811 compat_offseterr(vp, "linux_getdents"); 812 error = EINVAL; 813 goto out; 814 } 815 idb.d_off = (linux_off_t)off; 816 idb.d_reclen = (u_short)linux_reclen; 817 } 818 strcpy(idb.d_name, bdp->d_name); 819 if ((error = copyout((caddr_t)&idb, outp, linux_reclen))) 820 goto out; 821 /* advance past this real entry */ 822 inp += reclen; 823 off = *cookie++; /* each entry points to itself */ 824 /* advance output past Linux-shaped entry */ 825 outp += linux_reclen; 826 resid -= linux_reclen; 827 if (oldcall) 828 break; 829 } 830 831 /* if we squished out the whole block, try again */ 832 if (outp == (caddr_t)SCARG(uap, dent)) 833 goto again; 834 fp->f_offset = off; /* update the vnode offset */ 835 836 if (oldcall) 837 nbytes = resid + linux_reclen; 838 839 eof: 840 *retval = nbytes - resid; 841 out: 842 VOP_UNLOCK(vp, 0); 843 if (cookiebuf) 844 free(cookiebuf, M_TEMP); 845 free(buf, M_TEMP); 846 out1: 847 FILE_UNUSE(fp, p); 848 return error; 849 } 850 851 /* 852 * Even when just using registers to pass arguments to syscalls you can 853 * have 5 of them on the i386. So this newer version of select() does 854 * this. 855 */ 856 int 857 linux_sys_select(l, v, retval) 858 struct lwp *l; 859 void *v; 860 register_t *retval; 861 { 862 struct linux_sys_select_args /* { 863 syscallarg(int) nfds; 864 syscallarg(fd_set *) readfds; 865 syscallarg(fd_set *) writefds; 866 syscallarg(fd_set *) exceptfds; 867 syscallarg(struct timeval *) timeout; 868 } */ *uap = v; 869 870 return linux_select1(l, retval, SCARG(uap, nfds), SCARG(uap, readfds), 871 SCARG(uap, writefds), SCARG(uap, exceptfds), SCARG(uap, timeout)); 872 } 873 874 /* 875 * Common code for the old and new versions of select(). A couple of 876 * things are important: 877 * 1) return the amount of time left in the 'timeout' parameter 878 * 2) select never returns ERESTART on Linux, always return EINTR 879 */ 880 int 881 linux_select1(l, retval, nfds, readfds, writefds, exceptfds, timeout) 882 struct lwp *l; 883 register_t *retval; 884 int nfds; 885 fd_set *readfds, *writefds, *exceptfds; 886 struct timeval *timeout; 887 { 888 struct sys_select_args bsa; 889 struct proc *p = l->l_proc; 890 struct timeval tv0, tv1, utv, *tvp; 891 caddr_t sg; 892 int error; 893 894 SCARG(&bsa, nd) = nfds; 895 SCARG(&bsa, in) = readfds; 896 SCARG(&bsa, ou) = writefds; 897 SCARG(&bsa, ex) = exceptfds; 898 SCARG(&bsa, tv) = timeout; 899 900 /* 901 * Store current time for computation of the amount of 902 * time left. 903 */ 904 if (timeout) { 905 if ((error = copyin(timeout, &utv, sizeof(utv)))) 906 return error; 907 if (itimerfix(&utv)) { 908 /* 909 * The timeval was invalid. Convert it to something 910 * valid that will act as it does under Linux. 911 */ 912 sg = stackgap_init(p, 0); 913 tvp = stackgap_alloc(p, &sg, sizeof(utv)); 914 utv.tv_sec += utv.tv_usec / 1000000; 915 utv.tv_usec %= 1000000; 916 if (utv.tv_usec < 0) { 917 utv.tv_sec -= 1; 918 utv.tv_usec += 1000000; 919 } 920 if (utv.tv_sec < 0) 921 timerclear(&utv); 922 if ((error = copyout(&utv, tvp, sizeof(utv)))) 923 return error; 924 SCARG(&bsa, tv) = tvp; 925 } 926 microtime(&tv0); 927 } 928 929 error = sys_select(l, &bsa, retval); 930 if (error) { 931 /* 932 * See fs/select.c in the Linux kernel. Without this, 933 * Maelstrom doesn't work. 934 */ 935 if (error == ERESTART) 936 error = EINTR; 937 return error; 938 } 939 940 if (timeout) { 941 if (*retval) { 942 /* 943 * Compute how much time was left of the timeout, 944 * by subtracting the current time and the time 945 * before we started the call, and subtracting 946 * that result from the user-supplied value. 947 */ 948 microtime(&tv1); 949 timersub(&tv1, &tv0, &tv1); 950 timersub(&utv, &tv1, &utv); 951 if (utv.tv_sec < 0) 952 timerclear(&utv); 953 } else 954 timerclear(&utv); 955 if ((error = copyout(&utv, timeout, sizeof(utv)))) 956 return error; 957 } 958 959 return 0; 960 } 961 962 /* 963 * Get the process group of a certain process. Look it up 964 * and return the value. 965 */ 966 int 967 linux_sys_getpgid(l, v, retval) 968 struct lwp *l; 969 void *v; 970 register_t *retval; 971 { 972 struct linux_sys_getpgid_args /* { 973 syscallarg(int) pid; 974 } */ *uap = v; 975 struct proc *p = l->l_proc; 976 struct proc *targp; 977 978 if (SCARG(uap, pid) != 0 && SCARG(uap, pid) != p->p_pid) { 979 if ((targp = pfind(SCARG(uap, pid))) == 0) 980 return ESRCH; 981 } 982 else 983 targp = p; 984 985 retval[0] = targp->p_pgid; 986 return 0; 987 } 988 989 /* 990 * Set the 'personality' (emulation mode) for the current process. Only 991 * accept the Linux personality here (0). This call is needed because 992 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 993 * ELF binaries run in Linux mode, not SVR4 mode. 994 */ 995 int 996 linux_sys_personality(l, v, retval) 997 struct lwp *l; 998 void *v; 999 register_t *retval; 1000 { 1001 struct linux_sys_personality_args /* { 1002 syscallarg(int) per; 1003 } */ *uap = v; 1004 1005 if (SCARG(uap, per) != 0) 1006 return EINVAL; 1007 retval[0] = 0; 1008 return 0; 1009 } 1010 1011 #if defined(__i386__) || defined(__m68k__) 1012 /* 1013 * The calls are here because of type conversions. 1014 */ 1015 int 1016 linux_sys_setreuid16(l, v, retval) 1017 struct lwp *l; 1018 void *v; 1019 register_t *retval; 1020 { 1021 struct linux_sys_setreuid16_args /* { 1022 syscallarg(int) ruid; 1023 syscallarg(int) euid; 1024 } */ *uap = v; 1025 struct sys_setreuid_args bsa; 1026 1027 SCARG(&bsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 1028 (uid_t)-1 : SCARG(uap, ruid); 1029 SCARG(&bsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 1030 (uid_t)-1 : SCARG(uap, euid); 1031 1032 return sys_setreuid(l, &bsa, retval); 1033 } 1034 1035 int 1036 linux_sys_setregid16(l, v, retval) 1037 struct lwp *l; 1038 void *v; 1039 register_t *retval; 1040 { 1041 struct linux_sys_setregid16_args /* { 1042 syscallarg(int) rgid; 1043 syscallarg(int) egid; 1044 } */ *uap = v; 1045 struct sys_setregid_args bsa; 1046 1047 SCARG(&bsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 1048 (uid_t)-1 : SCARG(uap, rgid); 1049 SCARG(&bsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 1050 (uid_t)-1 : SCARG(uap, egid); 1051 1052 return sys_setregid(l, &bsa, retval); 1053 } 1054 1055 int 1056 linux_sys_setresuid16(l, v, retval) 1057 struct lwp *l; 1058 void *v; 1059 register_t *retval; 1060 { 1061 struct linux_sys_setresuid16_args /* { 1062 syscallarg(uid_t) ruid; 1063 syscallarg(uid_t) euid; 1064 syscallarg(uid_t) suid; 1065 } */ *uap = v; 1066 struct linux_sys_setresuid16_args lsa; 1067 1068 SCARG(&lsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 1069 (uid_t)-1 : SCARG(uap, ruid); 1070 SCARG(&lsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 1071 (uid_t)-1 : SCARG(uap, euid); 1072 SCARG(&lsa, suid) = ((linux_uid_t)SCARG(uap, suid) == (linux_uid_t)-1) ? 1073 (uid_t)-1 : SCARG(uap, suid); 1074 1075 return linux_sys_setresuid(l, &lsa, retval); 1076 } 1077 1078 int 1079 linux_sys_setresgid16(l, v, retval) 1080 struct lwp *l; 1081 void *v; 1082 register_t *retval; 1083 { 1084 struct linux_sys_setresgid16_args /* { 1085 syscallarg(gid_t) rgid; 1086 syscallarg(gid_t) egid; 1087 syscallarg(gid_t) sgid; 1088 } */ *uap = v; 1089 struct linux_sys_setresgid16_args lsa; 1090 1091 SCARG(&lsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 1092 (gid_t)-1 : SCARG(uap, rgid); 1093 SCARG(&lsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 1094 (gid_t)-1 : SCARG(uap, egid); 1095 SCARG(&lsa, sgid) = ((linux_gid_t)SCARG(uap, sgid) == (linux_gid_t)-1) ? 1096 (gid_t)-1 : SCARG(uap, sgid); 1097 1098 return linux_sys_setresgid(l, &lsa, retval); 1099 } 1100 1101 int 1102 linux_sys_getgroups16(l, v, retval) 1103 struct lwp *l; 1104 void *v; 1105 register_t *retval; 1106 { 1107 struct linux_sys_getgroups16_args /* { 1108 syscallarg(int) gidsetsize; 1109 syscallarg(linux_gid_t *) gidset; 1110 } */ *uap = v; 1111 struct proc *p = l->l_proc; 1112 caddr_t sg; 1113 int n, error, i; 1114 struct sys_getgroups_args bsa; 1115 gid_t *bset, *kbset; 1116 linux_gid_t *lset; 1117 struct pcred *pc = p->p_cred; 1118 1119 n = SCARG(uap, gidsetsize); 1120 if (n < 0) 1121 return EINVAL; 1122 error = 0; 1123 bset = kbset = NULL; 1124 lset = NULL; 1125 if (n > 0) { 1126 n = min(pc->pc_ucred->cr_ngroups, n); 1127 sg = stackgap_init(p, 0); 1128 bset = stackgap_alloc(p, &sg, n * sizeof (gid_t)); 1129 kbset = malloc(n * sizeof (gid_t), M_TEMP, M_WAITOK); 1130 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1131 if (bset == NULL || kbset == NULL || lset == NULL) 1132 return ENOMEM; 1133 SCARG(&bsa, gidsetsize) = n; 1134 SCARG(&bsa, gidset) = bset; 1135 error = sys_getgroups(l, &bsa, retval); 1136 if (error != 0) 1137 goto out; 1138 error = copyin(bset, kbset, n * sizeof (gid_t)); 1139 if (error != 0) 1140 goto out; 1141 for (i = 0; i < n; i++) 1142 lset[i] = (linux_gid_t)kbset[i]; 1143 error = copyout(lset, SCARG(uap, gidset), 1144 n * sizeof (linux_gid_t)); 1145 } else 1146 *retval = pc->pc_ucred->cr_ngroups; 1147 out: 1148 if (kbset != NULL) 1149 free(kbset, M_TEMP); 1150 if (lset != NULL) 1151 free(lset, M_TEMP); 1152 return error; 1153 } 1154 1155 int 1156 linux_sys_setgroups16(l, v, retval) 1157 struct lwp *l; 1158 void *v; 1159 register_t *retval; 1160 { 1161 struct linux_sys_setgroups16_args /* { 1162 syscallarg(int) gidsetsize; 1163 syscallarg(linux_gid_t *) gidset; 1164 } */ *uap = v; 1165 struct proc *p = l->l_proc; 1166 caddr_t sg; 1167 int n; 1168 int error, i; 1169 struct sys_setgroups_args bsa; 1170 gid_t *bset, *kbset; 1171 linux_gid_t *lset; 1172 1173 n = SCARG(uap, gidsetsize); 1174 if (n < 0 || n > NGROUPS) 1175 return EINVAL; 1176 sg = stackgap_init(p, 0); 1177 bset = stackgap_alloc(p, &sg, n * sizeof (gid_t)); 1178 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1179 kbset = malloc(n * sizeof (gid_t), M_TEMP, M_WAITOK); 1180 if (lset == NULL || bset == NULL) 1181 return ENOMEM; 1182 error = copyin(SCARG(uap, gidset), lset, n * sizeof (linux_gid_t)); 1183 if (error != 0) 1184 goto out; 1185 for (i = 0; i < n; i++) 1186 kbset[i] = (gid_t)lset[i]; 1187 error = copyout(kbset, bset, n * sizeof (gid_t)); 1188 if (error != 0) 1189 goto out; 1190 SCARG(&bsa, gidsetsize) = n; 1191 SCARG(&bsa, gidset) = bset; 1192 error = sys_setgroups(l, &bsa, retval); 1193 1194 out: 1195 if (lset != NULL) 1196 free(lset, M_TEMP); 1197 if (kbset != NULL) 1198 free(kbset, M_TEMP); 1199 1200 return error; 1201 } 1202 1203 #endif /* __i386__ || __m68k__ */ 1204 1205 /* 1206 * We have nonexistent fsuid equal to uid. 1207 * If modification is requested, refuse. 1208 */ 1209 int 1210 linux_sys_setfsuid(l, v, retval) 1211 struct lwp *l; 1212 void *v; 1213 register_t *retval; 1214 { 1215 struct linux_sys_setfsuid_args /* { 1216 syscallarg(uid_t) uid; 1217 } */ *uap = v; 1218 struct proc *p = l->l_proc; 1219 uid_t uid; 1220 1221 uid = SCARG(uap, uid); 1222 if (p->p_cred->p_ruid != uid) 1223 return sys_nosys(l, v, retval); 1224 else 1225 return (0); 1226 } 1227 1228 /* XXX XXX XXX */ 1229 #ifndef alpha 1230 int 1231 linux_sys_getfsuid(l, v, retval) 1232 struct lwp *l; 1233 void *v; 1234 register_t *retval; 1235 { 1236 return sys_getuid(l, v, retval); 1237 } 1238 #endif 1239 1240 int 1241 linux_sys_setresuid(l, v, retval) 1242 struct lwp *l; 1243 void *v; 1244 register_t *retval; 1245 { 1246 struct linux_sys_setresuid_args /* { 1247 syscallarg(uid_t) ruid; 1248 syscallarg(uid_t) euid; 1249 syscallarg(uid_t) suid; 1250 } */ *uap = v; 1251 1252 /* 1253 * Note: These checks are a little different than the NetBSD 1254 * setreuid(2) call performs. This precisely follows the 1255 * behavior of the Linux kernel. 1256 */ 1257 1258 return do_setresuid(l, SCARG(uap, ruid), SCARG(uap, euid), 1259 SCARG(uap, suid), 1260 ID_R_EQ_R | ID_R_EQ_E | ID_R_EQ_S | 1261 ID_E_EQ_R | ID_E_EQ_E | ID_E_EQ_S | 1262 ID_S_EQ_R | ID_S_EQ_E | ID_S_EQ_S ); 1263 } 1264 1265 int 1266 linux_sys_getresuid(l, v, retval) 1267 struct lwp *l; 1268 void *v; 1269 register_t *retval; 1270 { 1271 struct linux_sys_getresuid_args /* { 1272 syscallarg(uid_t *) ruid; 1273 syscallarg(uid_t *) euid; 1274 syscallarg(uid_t *) suid; 1275 } */ *uap = v; 1276 struct proc *p = l->l_proc; 1277 struct pcred *pc = p->p_cred; 1278 int error; 1279 1280 /* 1281 * Linux copies these values out to userspace like so: 1282 * 1283 * 1. Copy out ruid. 1284 * 2. If that succeeds, copy out euid. 1285 * 3. If both of those succeed, copy out suid. 1286 */ 1287 if ((error = copyout(&pc->p_ruid, SCARG(uap, ruid), 1288 sizeof(uid_t))) != 0) 1289 return (error); 1290 1291 if ((error = copyout(&pc->pc_ucred->cr_uid, SCARG(uap, euid), 1292 sizeof(uid_t))) != 0) 1293 return (error); 1294 1295 return (copyout(&pc->p_svuid, SCARG(uap, suid), sizeof(uid_t))); 1296 } 1297 1298 int 1299 linux_sys_ptrace(l, v, retval) 1300 struct lwp *l; 1301 void *v; 1302 register_t *retval; 1303 { 1304 struct linux_sys_ptrace_args /* { 1305 i386, m68k, powerpc: T=int 1306 alpha: T=long 1307 syscallarg(T) request; 1308 syscallarg(T) pid; 1309 syscallarg(T) addr; 1310 syscallarg(T) data; 1311 } */ *uap = v; 1312 const int *ptr; 1313 int request; 1314 int error; 1315 1316 ptr = linux_ptrace_request_map; 1317 request = SCARG(uap, request); 1318 while (*ptr != -1) 1319 if (*ptr++ == request) { 1320 struct sys_ptrace_args pta; 1321 1322 SCARG(&pta, req) = *ptr; 1323 SCARG(&pta, pid) = SCARG(uap, pid); 1324 SCARG(&pta, addr) = (caddr_t)SCARG(uap, addr); 1325 SCARG(&pta, data) = SCARG(uap, data); 1326 1327 /* 1328 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1329 * to continue where the process left off previously. 1330 * The same thing is achieved by addr == (caddr_t) 1 1331 * on NetBSD, so rewrite 'addr' appropriately. 1332 */ 1333 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1334 SCARG(&pta, addr) = (caddr_t) 1; 1335 1336 error = sys_ptrace(l, &pta, retval); 1337 if (error) 1338 return error; 1339 switch (request) { 1340 case LINUX_PTRACE_PEEKTEXT: 1341 case LINUX_PTRACE_PEEKDATA: 1342 error = copyout (retval, 1343 (caddr_t)SCARG(uap, data), sizeof *retval); 1344 *retval = SCARG(uap, data); 1345 break; 1346 default: 1347 break; 1348 } 1349 return error; 1350 } 1351 else 1352 ptr++; 1353 1354 return LINUX_SYS_PTRACE_ARCH(l, uap, retval); 1355 } 1356 1357 int 1358 linux_sys_reboot(struct lwp *l, void *v, register_t *retval) 1359 { 1360 struct linux_sys_reboot_args /* { 1361 syscallarg(int) magic1; 1362 syscallarg(int) magic2; 1363 syscallarg(int) cmd; 1364 syscallarg(void *) arg; 1365 } */ *uap = v; 1366 struct sys_reboot_args /* { 1367 syscallarg(int) opt; 1368 syscallarg(char *) bootstr; 1369 } */ sra; 1370 struct proc *p = l->l_proc; 1371 int error; 1372 1373 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1374 return(error); 1375 1376 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1377 return(EINVAL); 1378 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1379 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1380 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1381 return(EINVAL); 1382 1383 switch (SCARG(uap, cmd)) { 1384 case LINUX_REBOOT_CMD_RESTART: 1385 SCARG(&sra, opt) = RB_AUTOBOOT; 1386 break; 1387 case LINUX_REBOOT_CMD_HALT: 1388 SCARG(&sra, opt) = RB_HALT; 1389 break; 1390 case LINUX_REBOOT_CMD_POWER_OFF: 1391 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1392 break; 1393 case LINUX_REBOOT_CMD_RESTART2: 1394 /* Reboot with an argument. */ 1395 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1396 SCARG(&sra, bootstr) = SCARG(uap, arg); 1397 break; 1398 case LINUX_REBOOT_CMD_CAD_ON: 1399 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1400 case LINUX_REBOOT_CMD_CAD_OFF: 1401 return(0); 1402 default: 1403 return(EINVAL); 1404 } 1405 1406 return(sys_reboot(l, &sra, retval)); 1407 } 1408 1409 /* 1410 * Copy of compat_12_sys_swapon(). 1411 */ 1412 int 1413 linux_sys_swapon(l, v, retval) 1414 struct lwp *l; 1415 void *v; 1416 register_t *retval; 1417 { 1418 struct sys_swapctl_args ua; 1419 struct linux_sys_swapon_args /* { 1420 syscallarg(const char *) name; 1421 } */ *uap = v; 1422 1423 SCARG(&ua, cmd) = SWAP_ON; 1424 SCARG(&ua, arg) = (void *)SCARG(uap, name); 1425 SCARG(&ua, misc) = 0; /* priority */ 1426 return (sys_swapctl(l, &ua, retval)); 1427 } 1428 1429 /* 1430 * Stop swapping to the file or block device specified by path. 1431 */ 1432 int 1433 linux_sys_swapoff(l, v, retval) 1434 struct lwp *l; 1435 void *v; 1436 register_t *retval; 1437 { 1438 struct sys_swapctl_args ua; 1439 struct linux_sys_swapoff_args /* { 1440 syscallarg(const char *) path; 1441 } */ *uap = v; 1442 1443 SCARG(&ua, cmd) = SWAP_OFF; 1444 SCARG(&ua, arg) = (void *)SCARG(uap, path); 1445 return (sys_swapctl(l, &ua, retval)); 1446 } 1447 1448 /* 1449 * Copy of compat_09_sys_setdomainname() 1450 */ 1451 /* ARGSUSED */ 1452 int 1453 linux_sys_setdomainname(l, v, retval) 1454 struct lwp *l; 1455 void *v; 1456 register_t *retval; 1457 { 1458 struct linux_sys_setdomainname_args /* { 1459 syscallarg(char *) domainname; 1460 syscallarg(int) len; 1461 } */ *uap = v; 1462 int name[2]; 1463 1464 name[0] = CTL_KERN; 1465 name[1] = KERN_DOMAINNAME; 1466 return (old_sysctl(&name[0], 2, 0, 0, SCARG(uap, domainname), 1467 SCARG(uap, len), l)); 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