1 /* $NetBSD: linux_misc.c,v 1.183 2007/07/17 17:42:08 joerg 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 1.183 2007/07/17 17:42:08 joerg Exp $"); 68 69 #if defined(_KERNEL_OPT) 70 #include "opt_ptrace.h" 71 #endif 72 73 #include <sys/param.h> 74 #include <sys/systm.h> 75 #include <sys/namei.h> 76 #include <sys/proc.h> 77 #include <sys/dirent.h> 78 #include <sys/file.h> 79 #include <sys/stat.h> 80 #include <sys/filedesc.h> 81 #include <sys/ioctl.h> 82 #include <sys/kernel.h> 83 #include <sys/malloc.h> 84 #include <sys/mbuf.h> 85 #include <sys/mman.h> 86 #include <sys/mount.h> 87 #include <sys/prot.h> 88 #include <sys/reboot.h> 89 #include <sys/resource.h> 90 #include <sys/resourcevar.h> 91 #include <sys/select.h> 92 #include <sys/signal.h> 93 #include <sys/signalvar.h> 94 #include <sys/socket.h> 95 #include <sys/time.h> 96 #include <sys/times.h> 97 #include <sys/vnode.h> 98 #include <sys/uio.h> 99 #include <sys/wait.h> 100 #include <sys/utsname.h> 101 #include <sys/unistd.h> 102 #include <sys/vfs_syscalls.h> 103 #include <sys/swap.h> /* for SWAP_ON */ 104 #include <sys/sysctl.h> /* for KERN_DOMAINNAME */ 105 #include <sys/kauth.h> 106 107 #include <sys/ptrace.h> 108 #include <machine/ptrace.h> 109 110 #include <sys/syscall.h> 111 #include <sys/syscallargs.h> 112 113 #include <compat/linux/common/linux_machdep.h> 114 #include <compat/linux/common/linux_types.h> 115 #include <compat/linux/common/linux_signal.h> 116 117 #include <compat/linux/linux_syscallargs.h> 118 119 #include <compat/linux/common/linux_fcntl.h> 120 #include <compat/linux/common/linux_mmap.h> 121 #include <compat/linux/common/linux_dirent.h> 122 #include <compat/linux/common/linux_util.h> 123 #include <compat/linux/common/linux_misc.h> 124 #ifndef COMPAT_LINUX32 125 #include <compat/linux/common/linux_statfs.h> 126 #include <compat/linux/common/linux_limit.h> 127 #endif 128 #include <compat/linux/common/linux_ptrace.h> 129 #include <compat/linux/common/linux_reboot.h> 130 #include <compat/linux/common/linux_emuldata.h> 131 132 #ifndef COMPAT_LINUX32 133 const int linux_ptrace_request_map[] = { 134 LINUX_PTRACE_TRACEME, PT_TRACE_ME, 135 LINUX_PTRACE_PEEKTEXT, PT_READ_I, 136 LINUX_PTRACE_PEEKDATA, PT_READ_D, 137 LINUX_PTRACE_POKETEXT, PT_WRITE_I, 138 LINUX_PTRACE_POKEDATA, PT_WRITE_D, 139 LINUX_PTRACE_CONT, PT_CONTINUE, 140 LINUX_PTRACE_KILL, PT_KILL, 141 LINUX_PTRACE_ATTACH, PT_ATTACH, 142 LINUX_PTRACE_DETACH, PT_DETACH, 143 # ifdef PT_STEP 144 LINUX_PTRACE_SINGLESTEP, PT_STEP, 145 # endif 146 LINUX_PTRACE_SYSCALL, PT_SYSCALL, 147 -1 148 }; 149 150 const struct linux_mnttypes linux_fstypes[] = { 151 { MOUNT_FFS, LINUX_DEFAULT_SUPER_MAGIC }, 152 { MOUNT_NFS, LINUX_NFS_SUPER_MAGIC }, 153 { MOUNT_MFS, LINUX_DEFAULT_SUPER_MAGIC }, 154 { MOUNT_MSDOS, LINUX_MSDOS_SUPER_MAGIC }, 155 { MOUNT_LFS, LINUX_DEFAULT_SUPER_MAGIC }, 156 { MOUNT_FDESC, LINUX_DEFAULT_SUPER_MAGIC }, 157 { MOUNT_PORTAL, LINUX_DEFAULT_SUPER_MAGIC }, 158 { MOUNT_NULL, LINUX_DEFAULT_SUPER_MAGIC }, 159 { MOUNT_OVERLAY, LINUX_DEFAULT_SUPER_MAGIC }, 160 { MOUNT_UMAP, LINUX_DEFAULT_SUPER_MAGIC }, 161 { MOUNT_KERNFS, LINUX_DEFAULT_SUPER_MAGIC }, 162 { MOUNT_PROCFS, LINUX_PROC_SUPER_MAGIC }, 163 { MOUNT_AFS, LINUX_DEFAULT_SUPER_MAGIC }, 164 { MOUNT_CD9660, LINUX_ISOFS_SUPER_MAGIC }, 165 { MOUNT_UNION, LINUX_DEFAULT_SUPER_MAGIC }, 166 { MOUNT_ADOSFS, LINUX_ADFS_SUPER_MAGIC }, 167 { MOUNT_EXT2FS, LINUX_EXT2_SUPER_MAGIC }, 168 { MOUNT_CFS, LINUX_DEFAULT_SUPER_MAGIC }, 169 { MOUNT_CODA, LINUX_CODA_SUPER_MAGIC }, 170 { MOUNT_FILECORE, LINUX_DEFAULT_SUPER_MAGIC }, 171 { MOUNT_NTFS, LINUX_DEFAULT_SUPER_MAGIC }, 172 { MOUNT_SMBFS, LINUX_SMB_SUPER_MAGIC }, 173 { MOUNT_PTYFS, LINUX_DEVPTS_SUPER_MAGIC }, 174 { MOUNT_TMPFS, LINUX_DEFAULT_SUPER_MAGIC } 175 }; 176 const int linux_fstypes_cnt = sizeof(linux_fstypes) / sizeof(linux_fstypes[0]); 177 178 # ifdef DEBUG_LINUX 179 #define DPRINTF(a) uprintf a 180 # else 181 #define DPRINTF(a) 182 # endif 183 184 /* Local linux_misc.c functions: */ 185 static void linux_to_bsd_mmap_args __P((struct sys_mmap_args *, 186 const struct linux_sys_mmap_args *)); 187 static int linux_mmap __P((struct lwp *, struct linux_sys_mmap_args *, 188 register_t *, off_t)); 189 190 191 /* 192 * The information on a terminated (or stopped) process needs 193 * to be converted in order for Linux binaries to get a valid signal 194 * number out of it. 195 */ 196 int 197 bsd_to_linux_wstat(int st) 198 { 199 200 int sig; 201 202 if (WIFSIGNALED(st)) { 203 sig = WTERMSIG(st); 204 if (sig >= 0 && sig < NSIG) 205 st= (st & ~0177) | native_to_linux_signo[sig]; 206 } else if (WIFSTOPPED(st)) { 207 sig = WSTOPSIG(st); 208 if (sig >= 0 && sig < NSIG) 209 st = (st & ~0xff00) | 210 (native_to_linux_signo[sig] << 8); 211 } 212 return st; 213 } 214 215 /* 216 * wait4(2). Passed on to the NetBSD call, surrounded by code to 217 * reserve some space for a NetBSD-style wait status, and converting 218 * it to what Linux wants. 219 */ 220 int 221 linux_sys_wait4(l, v, retval) 222 struct lwp *l; 223 void *v; 224 register_t *retval; 225 { 226 struct linux_sys_wait4_args /* { 227 syscallarg(int) pid; 228 syscallarg(int *) status; 229 syscallarg(int) options; 230 syscallarg(struct rusage *) rusage; 231 } */ *uap = v; 232 int error, status, options, linux_options, was_zombie; 233 struct rusage ru; 234 235 linux_options = SCARG(uap, options); 236 options = WOPTSCHECKED; 237 if (linux_options & ~(LINUX_WAIT4_KNOWNFLAGS)) 238 return (EINVAL); 239 240 if (linux_options & LINUX_WAIT4_WNOHANG) 241 options |= WNOHANG; 242 if (linux_options & LINUX_WAIT4_WUNTRACED) 243 options |= WUNTRACED; 244 if (linux_options & LINUX_WAIT4_WALL) 245 options |= WALLSIG; 246 if (linux_options & LINUX_WAIT4_WCLONE) 247 options |= WALTSIG; 248 # ifdef DIAGNOSTIC 249 if (linux_options & LINUX_WAIT4_WNOTHREAD) 250 printf("WARNING: %s: linux process %d.%d called " 251 "waitpid with __WNOTHREAD set!", 252 __FILE__, l->l_proc->p_pid, l->l_lid); 253 254 # endif 255 256 error = do_sys_wait(l, &SCARG(uap, pid), &status, options, 257 SCARG(uap, rusage) != NULL ? &ru : NULL, &was_zombie); 258 259 retval[0] = SCARG(uap, pid); 260 if (SCARG(uap, pid) == 0) 261 return error; 262 263 sigdelset(&l->l_proc->p_sigpend.sp_set, SIGCHLD); /* XXXAD ksiginfo leak */ 264 265 if (SCARG(uap, rusage) != NULL) 266 error = copyout(&ru, SCARG(uap, rusage), sizeof(ru)); 267 268 if (error == 0 && SCARG(uap, status) != NULL) { 269 status = bsd_to_linux_wstat(status); 270 error = copyout(&status, SCARG(uap, status), sizeof status); 271 } 272 273 return error; 274 } 275 276 /* 277 * Linux brk(2). The check if the new address is >= the old one is 278 * done in the kernel in Linux. NetBSD does it in the library. 279 */ 280 int 281 linux_sys_brk(l, v, retval) 282 struct lwp *l; 283 void *v; 284 register_t *retval; 285 { 286 struct linux_sys_brk_args /* { 287 syscallarg(char *) nsize; 288 } */ *uap = v; 289 struct proc *p = l->l_proc; 290 char *nbrk = SCARG(uap, nsize); 291 struct sys_obreak_args oba; 292 struct vmspace *vm = p->p_vmspace; 293 struct linux_emuldata *ed = (struct linux_emuldata*)p->p_emuldata; 294 295 SCARG(&oba, nsize) = nbrk; 296 297 if ((void *) nbrk > vm->vm_daddr && sys_obreak(l, &oba, retval) == 0) 298 ed->s->p_break = (char*)nbrk; 299 else 300 nbrk = ed->s->p_break; 301 302 retval[0] = (register_t)nbrk; 303 304 return 0; 305 } 306 307 /* 308 * Implement the fs stat functions. Straightforward. 309 */ 310 int 311 linux_sys_statfs(l, v, retval) 312 struct lwp *l; 313 void *v; 314 register_t *retval; 315 { 316 struct linux_sys_statfs_args /* { 317 syscallarg(const char *) path; 318 syscallarg(struct linux_statfs *) sp; 319 } */ *uap = v; 320 struct statvfs *sb; 321 struct linux_statfs ltmp; 322 int error; 323 324 sb = STATVFSBUF_GET(); 325 error = do_sys_pstatvfs(l, SCARG(uap, path), ST_WAIT, sb); 326 if (error == 0) { 327 bsd_to_linux_statfs(sb, <mp); 328 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 329 } 330 STATVFSBUF_PUT(sb); 331 332 return error; 333 } 334 335 int 336 linux_sys_fstatfs(l, v, retval) 337 struct lwp *l; 338 void *v; 339 register_t *retval; 340 { 341 struct linux_sys_fstatfs_args /* { 342 syscallarg(int) fd; 343 syscallarg(struct linux_statfs *) sp; 344 } */ *uap = v; 345 struct statvfs *sb; 346 struct linux_statfs ltmp; 347 int error; 348 349 sb = STATVFSBUF_GET(); 350 error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb); 351 if (error == 0) { 352 bsd_to_linux_statfs(sb, <mp); 353 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 354 } 355 STATVFSBUF_PUT(sb); 356 357 return error; 358 } 359 360 /* 361 * uname(). Just copy the info from the various strings stored in the 362 * kernel, and put it in the Linux utsname structure. That structure 363 * is almost the same as the NetBSD one, only it has fields 65 characters 364 * long, and an extra domainname field. 365 */ 366 int 367 linux_sys_uname(struct lwp *l, void *v, register_t *retval) 368 { 369 struct linux_sys_uname_args /* { 370 syscallarg(struct linux_utsname *) up; 371 } */ *uap = v; 372 struct linux_utsname luts; 373 374 strncpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 375 strncpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 376 strncpy(luts.l_release, linux_release, sizeof(luts.l_release)); 377 strncpy(luts.l_version, linux_version, sizeof(luts.l_version)); 378 strncpy(luts.l_machine, LINUX_UNAME_ARCH, sizeof(luts.l_machine)); 379 strncpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 380 381 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 382 } 383 384 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 385 /* Used indirectly on: arm, i386, m68k */ 386 387 /* 388 * New type Linux mmap call. 389 * Only called directly on machines with >= 6 free regs. 390 */ 391 int 392 linux_sys_mmap(l, v, retval) 393 struct lwp *l; 394 void *v; 395 register_t *retval; 396 { 397 struct linux_sys_mmap_args /* { 398 syscallarg(unsigned long) addr; 399 syscallarg(size_t) len; 400 syscallarg(int) prot; 401 syscallarg(int) flags; 402 syscallarg(int) fd; 403 syscallarg(linux_off_t) offset; 404 } */ *uap = v; 405 406 if (SCARG(uap, offset) & PAGE_MASK) 407 return EINVAL; 408 409 return linux_mmap(l, uap, retval, SCARG(uap, offset)); 410 } 411 412 /* 413 * Guts of most architectures' mmap64() implementations. This shares 414 * its list of arguments with linux_sys_mmap(). 415 * 416 * The difference in linux_sys_mmap2() is that "offset" is actually 417 * (offset / pagesize), not an absolute byte count. This translation 418 * to pagesize offsets is done inside glibc between the mmap64() call 419 * point, and the actual syscall. 420 */ 421 int 422 linux_sys_mmap2(l, v, retval) 423 struct lwp *l; 424 void *v; 425 register_t *retval; 426 { 427 struct linux_sys_mmap2_args /* { 428 syscallarg(unsigned long) addr; 429 syscallarg(size_t) len; 430 syscallarg(int) prot; 431 syscallarg(int) flags; 432 syscallarg(int) fd; 433 syscallarg(linux_off_t) offset; 434 } */ *uap = v; 435 436 return linux_mmap(l, uap, retval, 437 ((off_t)SCARG(uap, offset)) << PAGE_SHIFT); 438 } 439 440 /* 441 * Massage arguments and call system mmap(2). 442 */ 443 static int 444 linux_mmap(l, uap, retval, offset) 445 struct lwp *l; 446 struct linux_sys_mmap_args *uap; 447 register_t *retval; 448 off_t offset; 449 { 450 struct sys_mmap_args cma; 451 int error; 452 size_t mmoff=0; 453 454 if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN) { 455 /* 456 * Request for stack-like memory segment. On linux, this 457 * works by mmap()ping (small) segment, which is automatically 458 * extended when page fault happens below the currently 459 * allocated area. We emulate this by allocating (typically 460 * bigger) segment sized at current stack size limit, and 461 * offsetting the requested and returned address accordingly. 462 * Since physical pages are only allocated on-demand, this 463 * is effectively identical. 464 */ 465 rlim_t ssl = l->l_proc->p_rlimit[RLIMIT_STACK].rlim_cur; 466 467 if (SCARG(uap, len) < ssl) { 468 /* Compute the address offset */ 469 mmoff = round_page(ssl) - SCARG(uap, len); 470 471 if (SCARG(uap, addr)) 472 SCARG(uap, addr) -= mmoff; 473 474 SCARG(uap, len) = (size_t) ssl; 475 } 476 } 477 478 linux_to_bsd_mmap_args(&cma, uap); 479 SCARG(&cma, pos) = offset; 480 481 error = sys_mmap(l, &cma, retval); 482 if (error) 483 return (error); 484 485 /* Shift the returned address for stack-like segment if necessary */ 486 if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN && mmoff) 487 retval[0] += mmoff; 488 489 return (0); 490 } 491 492 static void 493 linux_to_bsd_mmap_args(cma, uap) 494 struct sys_mmap_args *cma; 495 const struct linux_sys_mmap_args *uap; 496 { 497 int flags = MAP_TRYFIXED, fl = SCARG(uap, flags); 498 499 flags |= cvtto_bsd_mask(fl, LINUX_MAP_SHARED, MAP_SHARED); 500 flags |= cvtto_bsd_mask(fl, LINUX_MAP_PRIVATE, MAP_PRIVATE); 501 flags |= cvtto_bsd_mask(fl, LINUX_MAP_FIXED, MAP_FIXED); 502 flags |= cvtto_bsd_mask(fl, LINUX_MAP_ANON, MAP_ANON); 503 /* XXX XAX ERH: Any other flags here? There are more defined... */ 504 505 SCARG(cma, addr) = (void *)SCARG(uap, addr); 506 SCARG(cma, len) = SCARG(uap, len); 507 SCARG(cma, prot) = SCARG(uap, prot); 508 if (SCARG(cma, prot) & VM_PROT_WRITE) /* XXX */ 509 SCARG(cma, prot) |= VM_PROT_READ; 510 SCARG(cma, flags) = flags; 511 SCARG(cma, fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 512 SCARG(cma, pad) = 0; 513 } 514 515 #define LINUX_MREMAP_MAYMOVE 1 516 #define LINUX_MREMAP_FIXED 2 517 518 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; 530 531 struct proc *p; 532 struct vm_map *map; 533 vaddr_t oldva; 534 vaddr_t newva; 535 size_t oldsize; 536 size_t newsize; 537 int flags; 538 int uvmflags; 539 int error; 540 541 flags = SCARG(uap, flags); 542 oldva = (vaddr_t)SCARG(uap, old_address); 543 oldsize = round_page(SCARG(uap, old_size)); 544 newsize = round_page(SCARG(uap, new_size)); 545 if ((flags & ~(LINUX_MREMAP_FIXED|LINUX_MREMAP_MAYMOVE)) != 0) { 546 error = EINVAL; 547 goto done; 548 } 549 if ((flags & LINUX_MREMAP_FIXED) != 0) { 550 if ((flags & LINUX_MREMAP_MAYMOVE) == 0) { 551 error = EINVAL; 552 goto done; 553 } 554 #if 0 /* notyet */ 555 newva = SCARG(uap, new_address); 556 uvmflags = MAP_FIXED; 557 #else /* notyet */ 558 error = EOPNOTSUPP; 559 goto done; 560 #endif /* notyet */ 561 } else if ((flags & LINUX_MREMAP_MAYMOVE) != 0) { 562 uvmflags = 0; 563 } else { 564 newva = oldva; 565 uvmflags = MAP_FIXED; 566 } 567 p = l->l_proc; 568 map = &p->p_vmspace->vm_map; 569 error = uvm_mremap(map, oldva, oldsize, map, &newva, newsize, p, 570 uvmflags); 571 572 done: 573 *retval = (error != 0) ? 0 : (register_t)newva; 574 return error; 575 } 576 577 int 578 linux_sys_msync(l, v, retval) 579 struct lwp *l; 580 void *v; 581 register_t *retval; 582 { 583 struct linux_sys_msync_args /* { 584 syscallarg(void *) addr; 585 syscallarg(int) len; 586 syscallarg(int) fl; 587 } */ *uap = v; 588 589 struct sys___msync13_args bma; 590 591 /* flags are ignored */ 592 SCARG(&bma, addr) = SCARG(uap, addr); 593 SCARG(&bma, len) = SCARG(uap, len); 594 SCARG(&bma, flags) = SCARG(uap, fl); 595 596 return sys___msync13(l, &bma, retval); 597 } 598 599 int 600 linux_sys_mprotect(struct lwp *l, void *v, register_t *retval) 601 { 602 struct linux_sys_mprotect_args /* { 603 syscallarg(const void *) start; 604 syscallarg(unsigned long) len; 605 syscallarg(int) prot; 606 } */ *uap = v; 607 struct vm_map_entry *entry; 608 struct vm_map *map; 609 struct proc *p; 610 vaddr_t end, start, len, stacklim; 611 int prot, grows; 612 613 start = (vaddr_t)SCARG(uap, start); 614 len = round_page(SCARG(uap, len)); 615 prot = SCARG(uap, prot); 616 grows = prot & (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP); 617 prot &= ~grows; 618 end = start + len; 619 620 if (start & PAGE_MASK) 621 return EINVAL; 622 if (end < start) 623 return EINVAL; 624 if (end == start) 625 return 0; 626 627 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) 628 return EINVAL; 629 if (grows == (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP)) 630 return EINVAL; 631 632 p = l->l_proc; 633 map = &p->p_vmspace->vm_map; 634 vm_map_lock(map); 635 # ifdef notdef 636 VM_MAP_RANGE_CHECK(map, start, end); 637 # endif 638 if (!uvm_map_lookup_entry(map, start, &entry) || entry->start > start) { 639 vm_map_unlock(map); 640 return ENOMEM; 641 } 642 643 /* 644 * Approximate the behaviour of PROT_GROWS{DOWN,UP}. 645 */ 646 647 stacklim = (vaddr_t)p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur; 648 if (grows & LINUX_PROT_GROWSDOWN) { 649 if (USRSTACK - stacklim <= start && start < USRSTACK) { 650 start = USRSTACK - stacklim; 651 } else { 652 start = entry->start; 653 } 654 } else if (grows & LINUX_PROT_GROWSUP) { 655 if (USRSTACK <= end && end < USRSTACK + stacklim) { 656 end = USRSTACK + stacklim; 657 } else { 658 end = entry->end; 659 } 660 } 661 vm_map_unlock(map); 662 return uvm_map_protect(map, start, end, prot, FALSE); 663 } 664 665 /* 666 * This code is partly stolen from src/lib/libc/compat-43/times.c 667 */ 668 669 #define CONVTCK(r) (r.tv_sec * hz + r.tv_usec / (1000000 / hz)) 670 671 int 672 linux_sys_times(l, v, retval) 673 struct lwp *l; 674 void *v; 675 register_t *retval; 676 { 677 struct linux_sys_times_args /* { 678 syscallarg(struct times *) tms; 679 } */ *uap = v; 680 struct proc *p = l->l_proc; 681 struct timeval t; 682 int error; 683 684 if (SCARG(uap, tms)) { 685 struct linux_tms ltms; 686 struct rusage ru; 687 688 mutex_enter(&p->p_smutex); 689 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL, NULL); 690 ltms.ltms_utime = CONVTCK(ru.ru_utime); 691 ltms.ltms_stime = CONVTCK(ru.ru_stime); 692 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 693 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 694 mutex_exit(&p->p_smutex); 695 696 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 697 return error; 698 } 699 700 getmicrouptime(&t); 701 702 retval[0] = ((linux_clock_t)(CONVTCK(t))); 703 return 0; 704 } 705 706 #undef CONVTCK 707 708 /* 709 * Linux 'readdir' call. This code is mostly taken from the 710 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 711 * an attempt has been made to keep it a little cleaner (failing 712 * miserably, because of the cruft needed if count 1 is passed). 713 * 714 * The d_off field should contain the offset of the next valid entry, 715 * but in Linux it has the offset of the entry itself. We emulate 716 * that bug here. 717 * 718 * Read in BSD-style entries, convert them, and copy them out. 719 * 720 * Note that this doesn't handle union-mounted filesystems. 721 */ 722 int 723 linux_sys_getdents(l, v, retval) 724 struct lwp *l; 725 void *v; 726 register_t *retval; 727 { 728 struct linux_sys_getdents_args /* { 729 syscallarg(int) fd; 730 syscallarg(struct linux_dirent *) dent; 731 syscallarg(unsigned int) count; 732 } */ *uap = v; 733 struct dirent *bdp; 734 struct vnode *vp; 735 char *inp, *tbuf; /* BSD-format */ 736 int len, reclen; /* BSD-format */ 737 char *outp; /* Linux-format */ 738 int resid, linux_reclen = 0; /* Linux-format */ 739 struct file *fp; 740 struct uio auio; 741 struct iovec aiov; 742 struct linux_dirent idb; 743 off_t off; /* true file offset */ 744 int buflen, error, eofflag, nbytes, oldcall; 745 struct vattr va; 746 off_t *cookiebuf = NULL, *cookie; 747 int ncookies; 748 749 /* getvnode() will use the descriptor for us */ 750 if ((error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp)) != 0) 751 return (error); 752 753 if ((fp->f_flag & FREAD) == 0) { 754 error = EBADF; 755 goto out1; 756 } 757 758 vp = (struct vnode *)fp->f_data; 759 if (vp->v_type != VDIR) { 760 error = EINVAL; 761 goto out1; 762 } 763 764 if ((error = VOP_GETATTR(vp, &va, l->l_cred, l))) 765 goto out1; 766 767 nbytes = SCARG(uap, count); 768 if (nbytes == 1) { /* emulating old, broken behaviour */ 769 nbytes = sizeof (idb); 770 buflen = max(va.va_blocksize, nbytes); 771 oldcall = 1; 772 } else { 773 buflen = min(MAXBSIZE, nbytes); 774 if (buflen < va.va_blocksize) 775 buflen = va.va_blocksize; 776 oldcall = 0; 777 } 778 tbuf = malloc(buflen, M_TEMP, M_WAITOK); 779 780 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 781 off = fp->f_offset; 782 again: 783 aiov.iov_base = tbuf; 784 aiov.iov_len = buflen; 785 auio.uio_iov = &aiov; 786 auio.uio_iovcnt = 1; 787 auio.uio_rw = UIO_READ; 788 auio.uio_resid = buflen; 789 auio.uio_offset = off; 790 UIO_SETUP_SYSSPACE(&auio); 791 /* 792 * First we read into the malloc'ed buffer, then 793 * we massage it into user space, one record at a time. 794 */ 795 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 796 &ncookies); 797 if (error) 798 goto out; 799 800 inp = tbuf; 801 outp = (void *)SCARG(uap, dent); 802 resid = nbytes; 803 if ((len = buflen - auio.uio_resid) == 0) 804 goto eof; 805 806 for (cookie = cookiebuf; len > 0; len -= reclen) { 807 bdp = (struct dirent *)inp; 808 reclen = bdp->d_reclen; 809 if (reclen & 3) 810 panic("linux_readdir"); 811 if (bdp->d_fileno == 0) { 812 inp += reclen; /* it is a hole; squish it out */ 813 if (cookie) 814 off = *cookie++; 815 else 816 off += reclen; 817 continue; 818 } 819 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 820 if (reclen > len || resid < linux_reclen) { 821 /* entry too big for buffer, so just stop */ 822 outp++; 823 break; 824 } 825 /* 826 * Massage in place to make a Linux-shaped dirent (otherwise 827 * we have to worry about touching user memory outside of 828 * the copyout() call). 829 */ 830 idb.d_ino = bdp->d_fileno; 831 /* 832 * The old readdir() call misuses the offset and reclen fields. 833 */ 834 if (oldcall) { 835 idb.d_off = (linux_off_t)linux_reclen; 836 idb.d_reclen = (u_short)bdp->d_namlen; 837 } else { 838 if (sizeof (idb.d_off) <= 4 && (off >> 32) != 0) { 839 compat_offseterr(vp, "linux_getdents"); 840 error = EINVAL; 841 goto out; 842 } 843 idb.d_off = (linux_off_t)off; 844 idb.d_reclen = (u_short)linux_reclen; 845 } 846 strcpy(idb.d_name, bdp->d_name); 847 if ((error = copyout((void *)&idb, outp, linux_reclen))) 848 goto out; 849 /* advance past this real entry */ 850 inp += reclen; 851 if (cookie) 852 off = *cookie++; /* each entry points to itself */ 853 else 854 off += reclen; 855 /* advance output past Linux-shaped entry */ 856 outp += linux_reclen; 857 resid -= linux_reclen; 858 if (oldcall) 859 break; 860 } 861 862 /* if we squished out the whole block, try again */ 863 if (outp == (void *)SCARG(uap, dent)) 864 goto again; 865 fp->f_offset = off; /* update the vnode offset */ 866 867 if (oldcall) 868 nbytes = resid + linux_reclen; 869 870 eof: 871 *retval = nbytes - resid; 872 out: 873 VOP_UNLOCK(vp, 0); 874 if (cookiebuf) 875 free(cookiebuf, M_TEMP); 876 free(tbuf, M_TEMP); 877 out1: 878 FILE_UNUSE(fp, l); 879 return error; 880 } 881 882 /* 883 * Even when just using registers to pass arguments to syscalls you can 884 * have 5 of them on the i386. So this newer version of select() does 885 * this. 886 */ 887 int 888 linux_sys_select(l, v, retval) 889 struct lwp *l; 890 void *v; 891 register_t *retval; 892 { 893 struct linux_sys_select_args /* { 894 syscallarg(int) nfds; 895 syscallarg(fd_set *) readfds; 896 syscallarg(fd_set *) writefds; 897 syscallarg(fd_set *) exceptfds; 898 syscallarg(struct timeval *) timeout; 899 } */ *uap = v; 900 901 return linux_select1(l, retval, SCARG(uap, nfds), SCARG(uap, readfds), 902 SCARG(uap, writefds), SCARG(uap, exceptfds), SCARG(uap, timeout)); 903 } 904 905 /* 906 * Common code for the old and new versions of select(). A couple of 907 * things are important: 908 * 1) return the amount of time left in the 'timeout' parameter 909 * 2) select never returns ERESTART on Linux, always return EINTR 910 */ 911 int 912 linux_select1(l, retval, nfds, readfds, writefds, exceptfds, timeout) 913 struct lwp *l; 914 register_t *retval; 915 int nfds; 916 fd_set *readfds, *writefds, *exceptfds; 917 struct timeval *timeout; 918 { 919 struct timeval tv0, tv1, utv, *tv = NULL; 920 int error; 921 922 /* 923 * Store current time for computation of the amount of 924 * time left. 925 */ 926 if (timeout) { 927 if ((error = copyin(timeout, &utv, sizeof(utv)))) 928 return error; 929 if (itimerfix(&utv)) { 930 /* 931 * The timeval was invalid. Convert it to something 932 * valid that will act as it does under Linux. 933 */ 934 utv.tv_sec += utv.tv_usec / 1000000; 935 utv.tv_usec %= 1000000; 936 if (utv.tv_usec < 0) { 937 utv.tv_sec -= 1; 938 utv.tv_usec += 1000000; 939 } 940 if (utv.tv_sec < 0) 941 timerclear(&utv); 942 } 943 tv = &utv; 944 microtime(&tv0); 945 } 946 947 error = selcommon(l, retval, nfds, readfds, writefds, exceptfds, 948 tv, NULL); 949 950 if (error) { 951 /* 952 * See fs/select.c in the Linux kernel. Without this, 953 * Maelstrom doesn't work. 954 */ 955 if (error == ERESTART) 956 error = EINTR; 957 return error; 958 } 959 960 if (timeout) { 961 if (*retval) { 962 /* 963 * Compute how much time was left of the timeout, 964 * by subtracting the current time and the time 965 * before we started the call, and subtracting 966 * that result from the user-supplied value. 967 */ 968 microtime(&tv1); 969 timersub(&tv1, &tv0, &tv1); 970 timersub(&utv, &tv1, &utv); 971 if (utv.tv_sec < 0) 972 timerclear(&utv); 973 } else 974 timerclear(&utv); 975 if ((error = copyout(&utv, timeout, sizeof(utv)))) 976 return error; 977 } 978 979 return 0; 980 } 981 982 /* 983 * Get the process group of a certain process. Look it up 984 * and return the value. 985 */ 986 int 987 linux_sys_getpgid(l, v, retval) 988 struct lwp *l; 989 void *v; 990 register_t *retval; 991 { 992 struct linux_sys_getpgid_args /* { 993 syscallarg(int) pid; 994 } */ *uap = v; 995 struct proc *p = l->l_proc; 996 struct proc *targp; 997 998 if (SCARG(uap, pid) != 0 && SCARG(uap, pid) != p->p_pid) { 999 if ((targp = pfind(SCARG(uap, pid))) == 0) 1000 return ESRCH; 1001 } 1002 else 1003 targp = p; 1004 1005 retval[0] = targp->p_pgid; 1006 return 0; 1007 } 1008 1009 /* 1010 * Set the 'personality' (emulation mode) for the current process. Only 1011 * accept the Linux personality here (0). This call is needed because 1012 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 1013 * ELF binaries run in Linux mode, not SVR4 mode. 1014 */ 1015 int 1016 linux_sys_personality(struct lwp *l, void *v, register_t *retval) 1017 { 1018 struct linux_sys_personality_args /* { 1019 syscallarg(int) per; 1020 } */ *uap = v; 1021 1022 if (SCARG(uap, per) != 0) 1023 return EINVAL; 1024 retval[0] = 0; 1025 return 0; 1026 } 1027 #endif /* !COMPAT_LINUX32 */ 1028 1029 #if defined(__i386__) || defined(__m68k__) || defined(COMPAT_LINUX32) 1030 /* 1031 * The calls are here because of type conversions. 1032 */ 1033 int 1034 linux_sys_setreuid16(l, v, retval) 1035 struct lwp *l; 1036 void *v; 1037 register_t *retval; 1038 { 1039 struct linux_sys_setreuid16_args /* { 1040 syscallarg(int) ruid; 1041 syscallarg(int) euid; 1042 } */ *uap = v; 1043 struct sys_setreuid_args bsa; 1044 1045 SCARG(&bsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 1046 (uid_t)-1 : SCARG(uap, ruid); 1047 SCARG(&bsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 1048 (uid_t)-1 : SCARG(uap, euid); 1049 1050 return sys_setreuid(l, &bsa, retval); 1051 } 1052 1053 int 1054 linux_sys_setregid16(l, v, retval) 1055 struct lwp *l; 1056 void *v; 1057 register_t *retval; 1058 { 1059 struct linux_sys_setregid16_args /* { 1060 syscallarg(int) rgid; 1061 syscallarg(int) egid; 1062 } */ *uap = v; 1063 struct sys_setregid_args bsa; 1064 1065 SCARG(&bsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 1066 (uid_t)-1 : SCARG(uap, rgid); 1067 SCARG(&bsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 1068 (uid_t)-1 : SCARG(uap, egid); 1069 1070 return sys_setregid(l, &bsa, retval); 1071 } 1072 1073 int 1074 linux_sys_setresuid16(l, v, retval) 1075 struct lwp *l; 1076 void *v; 1077 register_t *retval; 1078 { 1079 struct linux_sys_setresuid16_args /* { 1080 syscallarg(uid_t) ruid; 1081 syscallarg(uid_t) euid; 1082 syscallarg(uid_t) suid; 1083 } */ *uap = v; 1084 struct linux_sys_setresuid16_args lsa; 1085 1086 SCARG(&lsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 1087 (uid_t)-1 : SCARG(uap, ruid); 1088 SCARG(&lsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 1089 (uid_t)-1 : SCARG(uap, euid); 1090 SCARG(&lsa, suid) = ((linux_uid_t)SCARG(uap, suid) == (linux_uid_t)-1) ? 1091 (uid_t)-1 : SCARG(uap, suid); 1092 1093 return linux_sys_setresuid(l, &lsa, retval); 1094 } 1095 1096 int 1097 linux_sys_setresgid16(l, v, retval) 1098 struct lwp *l; 1099 void *v; 1100 register_t *retval; 1101 { 1102 struct linux_sys_setresgid16_args /* { 1103 syscallarg(gid_t) rgid; 1104 syscallarg(gid_t) egid; 1105 syscallarg(gid_t) sgid; 1106 } */ *uap = v; 1107 struct linux_sys_setresgid16_args lsa; 1108 1109 SCARG(&lsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 1110 (gid_t)-1 : SCARG(uap, rgid); 1111 SCARG(&lsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 1112 (gid_t)-1 : SCARG(uap, egid); 1113 SCARG(&lsa, sgid) = ((linux_gid_t)SCARG(uap, sgid) == (linux_gid_t)-1) ? 1114 (gid_t)-1 : SCARG(uap, sgid); 1115 1116 return linux_sys_setresgid(l, &lsa, retval); 1117 } 1118 1119 int 1120 linux_sys_getgroups16(l, v, retval) 1121 struct lwp *l; 1122 void *v; 1123 register_t *retval; 1124 { 1125 struct linux_sys_getgroups16_args /* { 1126 syscallarg(int) gidsetsize; 1127 syscallarg(linux_gid_t *) gidset; 1128 } */ *uap = v; 1129 linux_gid_t lset[16]; 1130 linux_gid_t *gidset; 1131 unsigned int ngrps; 1132 int i, n, j; 1133 int error; 1134 1135 ngrps = kauth_cred_ngroups(l->l_cred); 1136 *retval = ngrps; 1137 if (SCARG(uap, gidsetsize) == 0) 1138 return 0; 1139 if (SCARG(uap, gidsetsize) < ngrps) 1140 return EINVAL; 1141 1142 gidset = SCARG(uap, gidset); 1143 for (i = 0; i < (n = ngrps); i += n, gidset += n) { 1144 n -= i; 1145 if (n > __arraycount(lset)) 1146 n = __arraycount(lset); 1147 for (j = 0; j < n; j++) 1148 lset[j] = kauth_cred_group(l->l_cred, i + j); 1149 error = copyout(lset, gidset, n * sizeof(lset[0])); 1150 if (error != 0) 1151 return error; 1152 } 1153 1154 return 0; 1155 } 1156 1157 /* 1158 * It is very unlikly that any problem using 16bit groups is written 1159 * to allow for more than 16 of them, so don't bother trying to 1160 * support that. 1161 */ 1162 #define COMPAT_NGROUPS16 16 1163 1164 int 1165 linux_sys_setgroups16(l, v, retval) 1166 struct lwp *l; 1167 void *v; 1168 register_t *retval; 1169 { 1170 struct linux_sys_setgroups16_args /* { 1171 syscallarg(int) gidsetsize; 1172 syscallarg(linux_gid_t *) gidset; 1173 } */ *uap = v; 1174 linux_gid_t lset[COMPAT_NGROUPS16]; 1175 kauth_cred_t ncred; 1176 int error; 1177 gid_t grbuf[COMPAT_NGROUPS16]; 1178 unsigned int i, ngroups = SCARG(uap, gidsetsize); 1179 1180 if (ngroups > COMPAT_NGROUPS16) 1181 return EINVAL; 1182 error = copyin(SCARG(uap, gidset), lset, ngroups); 1183 if (error != 0) 1184 return error; 1185 1186 for (i = 0; i < ngroups; i++) 1187 grbuf[i] = lset[i]; 1188 1189 ncred = kauth_cred_alloc(); 1190 error = kauth_cred_setgroups(ncred, grbuf, SCARG(uap, gidsetsize), 1191 -1, UIO_SYSSPACE); 1192 if (error != 0) { 1193 kauth_cred_free(ncred); 1194 return error; 1195 } 1196 1197 return kauth_proc_setgroups(l, ncred); 1198 } 1199 1200 #endif /* __i386__ || __m68k__ || COMPAT_LINUX32 */ 1201 1202 #ifndef COMPAT_LINUX32 1203 /* 1204 * We have nonexistent fsuid equal to uid. 1205 * If modification is requested, refuse. 1206 */ 1207 int 1208 linux_sys_setfsuid(l, v, retval) 1209 struct lwp *l; 1210 void *v; 1211 register_t *retval; 1212 { 1213 struct linux_sys_setfsuid_args /* { 1214 syscallarg(uid_t) uid; 1215 } */ *uap = v; 1216 uid_t uid; 1217 1218 uid = SCARG(uap, uid); 1219 if (kauth_cred_getuid(l->l_cred) != 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(struct lwp *l, void *v, register_t *retval) 1239 { 1240 struct linux_sys_setresuid_args /* { 1241 syscallarg(uid_t) ruid; 1242 syscallarg(uid_t) euid; 1243 syscallarg(uid_t) suid; 1244 } */ *uap = v; 1245 1246 /* 1247 * Note: These checks are a little different than the NetBSD 1248 * setreuid(2) call performs. This precisely follows the 1249 * behavior of the Linux kernel. 1250 */ 1251 1252 return do_setresuid(l, SCARG(uap, ruid), SCARG(uap, euid), 1253 SCARG(uap, suid), 1254 ID_R_EQ_R | ID_R_EQ_E | ID_R_EQ_S | 1255 ID_E_EQ_R | ID_E_EQ_E | ID_E_EQ_S | 1256 ID_S_EQ_R | ID_S_EQ_E | ID_S_EQ_S ); 1257 } 1258 1259 int 1260 linux_sys_getresuid(struct lwp *l, void *v, register_t *retval) 1261 { 1262 struct linux_sys_getresuid_args /* { 1263 syscallarg(uid_t *) ruid; 1264 syscallarg(uid_t *) euid; 1265 syscallarg(uid_t *) suid; 1266 } */ *uap = v; 1267 kauth_cred_t pc = l->l_cred; 1268 int error; 1269 uid_t uid; 1270 1271 /* 1272 * Linux copies these values out to userspace like so: 1273 * 1274 * 1. Copy out ruid. 1275 * 2. If that succeeds, copy out euid. 1276 * 3. If both of those succeed, copy out suid. 1277 */ 1278 uid = kauth_cred_getuid(pc); 1279 if ((error = copyout(&uid, SCARG(uap, ruid), sizeof(uid_t))) != 0) 1280 return (error); 1281 1282 uid = kauth_cred_geteuid(pc); 1283 if ((error = copyout(&uid, SCARG(uap, euid), sizeof(uid_t))) != 0) 1284 return (error); 1285 1286 uid = kauth_cred_getsvuid(pc); 1287 1288 return (copyout(&uid, SCARG(uap, suid), sizeof(uid_t))); 1289 } 1290 1291 int 1292 linux_sys_ptrace(l, v, retval) 1293 struct lwp *l; 1294 void *v; 1295 register_t *retval; 1296 { 1297 #if defined(PTRACE) || defined(_LKM) 1298 struct linux_sys_ptrace_args /* { 1299 i386, m68k, powerpc: T=int 1300 alpha, amd64: T=long 1301 syscallarg(T) request; 1302 syscallarg(T) pid; 1303 syscallarg(T) addr; 1304 syscallarg(T) data; 1305 } */ *uap = v; 1306 const int *ptr; 1307 int request; 1308 int error; 1309 #ifdef _LKM 1310 #define sys_ptrace (*sysent[SYS_ptrace].sy_call) 1311 #endif 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) = (void *)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 == (void *) 1 1328 * on NetBSD, so rewrite 'addr' appropriately. 1329 */ 1330 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1331 SCARG(&pta, addr) = (void *) 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 (void *)SCARG(uap, data), 1341 sizeof *retval); 1342 *retval = SCARG(uap, data); 1343 break; 1344 default: 1345 break; 1346 } 1347 return error; 1348 } 1349 else 1350 ptr++; 1351 1352 return LINUX_SYS_PTRACE_ARCH(l, uap, retval); 1353 #else 1354 return ENOSYS; 1355 #endif /* PTRACE || _LKM */ 1356 } 1357 1358 int 1359 linux_sys_reboot(struct lwp *l, void *v, register_t *retval) 1360 { 1361 struct linux_sys_reboot_args /* { 1362 syscallarg(int) magic1; 1363 syscallarg(int) magic2; 1364 syscallarg(int) cmd; 1365 syscallarg(void *) arg; 1366 } */ *uap = v; 1367 struct sys_reboot_args /* { 1368 syscallarg(int) opt; 1369 syscallarg(char *) bootstr; 1370 } */ sra; 1371 int error; 1372 1373 if ((error = kauth_authorize_system(l->l_cred, 1374 KAUTH_SYSTEM_REBOOT, 0, NULL, NULL, NULL)) != 0) 1375 return(error); 1376 1377 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1378 return(EINVAL); 1379 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1380 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1381 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1382 return(EINVAL); 1383 1384 switch (SCARG(uap, cmd)) { 1385 case LINUX_REBOOT_CMD_RESTART: 1386 SCARG(&sra, opt) = RB_AUTOBOOT; 1387 break; 1388 case LINUX_REBOOT_CMD_HALT: 1389 SCARG(&sra, opt) = RB_HALT; 1390 break; 1391 case LINUX_REBOOT_CMD_POWER_OFF: 1392 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1393 break; 1394 case LINUX_REBOOT_CMD_RESTART2: 1395 /* Reboot with an argument. */ 1396 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1397 SCARG(&sra, bootstr) = SCARG(uap, arg); 1398 break; 1399 case LINUX_REBOOT_CMD_CAD_ON: 1400 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1401 case LINUX_REBOOT_CMD_CAD_OFF: 1402 return(0); 1403 default: 1404 return(EINVAL); 1405 } 1406 1407 return(sys_reboot(l, &sra, retval)); 1408 } 1409 1410 /* 1411 * Copy of compat_12_sys_swapon(). 1412 */ 1413 int 1414 linux_sys_swapon(l, v, retval) 1415 struct lwp *l; 1416 void *v; 1417 register_t *retval; 1418 { 1419 struct sys_swapctl_args ua; 1420 struct linux_sys_swapon_args /* { 1421 syscallarg(const char *) name; 1422 } */ *uap = v; 1423 1424 SCARG(&ua, cmd) = SWAP_ON; 1425 SCARG(&ua, arg) = (void *)__UNCONST(SCARG(uap, name)); 1426 SCARG(&ua, misc) = 0; /* priority */ 1427 return (sys_swapctl(l, &ua, retval)); 1428 } 1429 1430 /* 1431 * Stop swapping to the file or block device specified by path. 1432 */ 1433 int 1434 linux_sys_swapoff(l, v, retval) 1435 struct lwp *l; 1436 void *v; 1437 register_t *retval; 1438 { 1439 struct sys_swapctl_args ua; 1440 struct linux_sys_swapoff_args /* { 1441 syscallarg(const char *) path; 1442 } */ *uap = v; 1443 1444 SCARG(&ua, cmd) = SWAP_OFF; 1445 SCARG(&ua, arg) = __UNCONST(SCARG(uap, path)); /*XXXUNCONST*/ 1446 return (sys_swapctl(l, &ua, retval)); 1447 } 1448 1449 /* 1450 * Copy of compat_09_sys_setdomainname() 1451 */ 1452 /* ARGSUSED */ 1453 int 1454 linux_sys_setdomainname(struct lwp *l, void *v, register_t *retval) 1455 { 1456 struct linux_sys_setdomainname_args /* { 1457 syscallarg(char *) domainname; 1458 syscallarg(int) len; 1459 } */ *uap = v; 1460 int name[2]; 1461 1462 name[0] = CTL_KERN; 1463 name[1] = KERN_DOMAINNAME; 1464 return (old_sysctl(&name[0], 2, 0, 0, SCARG(uap, domainname), 1465 SCARG(uap, len), l)); 1466 } 1467 1468 /* 1469 * sysinfo() 1470 */ 1471 /* ARGSUSED */ 1472 int 1473 linux_sys_sysinfo(struct lwp *l, void *v, register_t *retval) 1474 { 1475 struct linux_sys_sysinfo_args /* { 1476 syscallarg(struct linux_sysinfo *) arg; 1477 } */ *uap = v; 1478 struct linux_sysinfo si; 1479 struct loadavg *la; 1480 1481 si.uptime = time_uptime; 1482 la = &averunnable; 1483 si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1484 si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1485 si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1486 si.totalram = ctob((u_long)physmem); 1487 si.freeram = (u_long)uvmexp.free * uvmexp.pagesize; 1488 si.sharedram = 0; /* XXX */ 1489 si.bufferram = (u_long)uvmexp.filepages * uvmexp.pagesize; 1490 si.totalswap = (u_long)uvmexp.swpages * uvmexp.pagesize; 1491 si.freeswap = 1492 (u_long)(uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize; 1493 si.procs = nprocs; 1494 1495 /* The following are only present in newer Linux kernels. */ 1496 si.totalbig = 0; 1497 si.freebig = 0; 1498 si.mem_unit = 1; 1499 1500 return (copyout(&si, SCARG(uap, arg), sizeof si)); 1501 } 1502 1503 int 1504 linux_sys_getrlimit(l, v, retval) 1505 struct lwp *l; 1506 void *v; 1507 register_t *retval; 1508 { 1509 struct linux_sys_getrlimit_args /* { 1510 syscallarg(int) which; 1511 # ifdef LINUX_LARGEFILE64 1512 syscallarg(struct rlimit *) rlp; 1513 # else 1514 syscallarg(struct orlimit *) rlp; 1515 # endif 1516 } */ *uap = v; 1517 # ifdef LINUX_LARGEFILE64 1518 struct rlimit orl; 1519 # else 1520 struct orlimit orl; 1521 # endif 1522 int which; 1523 1524 which = linux_to_bsd_limit(SCARG(uap, which)); 1525 if (which < 0) 1526 return -which; 1527 1528 bsd_to_linux_rlimit(&orl, &l->l_proc->p_rlimit[which]); 1529 1530 return copyout(&orl, SCARG(uap, rlp), sizeof(orl)); 1531 } 1532 1533 int 1534 linux_sys_setrlimit(l, v, retval) 1535 struct lwp *l; 1536 void *v; 1537 register_t *retval; 1538 { 1539 struct linux_sys_setrlimit_args /* { 1540 syscallarg(int) which; 1541 # ifdef LINUX_LARGEFILE64 1542 syscallarg(struct rlimit *) rlp; 1543 # else 1544 syscallarg(struct orlimit *) rlp; 1545 # endif 1546 } */ *uap = v; 1547 struct rlimit rl; 1548 # ifdef LINUX_LARGEFILE64 1549 struct rlimit orl; 1550 # else 1551 struct orlimit orl; 1552 # endif 1553 int error; 1554 int which; 1555 1556 if ((error = copyin(SCARG(uap, rlp), &orl, sizeof(orl))) != 0) 1557 return error; 1558 1559 which = linux_to_bsd_limit(SCARG(uap, which)); 1560 if (which < 0) 1561 return -which; 1562 1563 linux_to_bsd_rlimit(&rl, &orl); 1564 return dosetrlimit(l, l->l_proc, which, &rl); 1565 } 1566 1567 # if !defined(__mips__) && !defined(__amd64__) 1568 /* XXX: this doesn't look 100% common, at least mips doesn't have it */ 1569 int 1570 linux_sys_ugetrlimit(l, v, retval) 1571 struct lwp *l; 1572 void *v; 1573 register_t *retval; 1574 { 1575 return linux_sys_getrlimit(l, v, retval); 1576 } 1577 # endif 1578 1579 /* 1580 * This gets called for unsupported syscalls. The difference to sys_nosys() 1581 * is that process does not get SIGSYS, the call just returns with ENOSYS. 1582 * This is the way Linux does it and glibc depends on this behaviour. 1583 */ 1584 int 1585 linux_sys_nosys(struct lwp *l, void *v, 1586 register_t *retval) 1587 { 1588 return (ENOSYS); 1589 } 1590 1591 int 1592 linux_sys_getpriority(l, v, retval) 1593 struct lwp *l; 1594 void *v; 1595 register_t *retval; 1596 { 1597 struct linux_sys_getpriority_args /* { 1598 syscallarg(int) which; 1599 syscallarg(int) who; 1600 } */ *uap = v; 1601 struct sys_getpriority_args bsa; 1602 int error; 1603 1604 SCARG(&bsa, which) = SCARG(uap, which); 1605 SCARG(&bsa, who) = SCARG(uap, who); 1606 1607 if ((error = sys_getpriority(l, &bsa, retval))) 1608 return error; 1609 1610 *retval = NZERO - *retval; 1611 1612 return 0; 1613 } 1614 1615 #endif /* !COMPAT_LINUX32 */ 1616