1 /* $NetBSD: linux_misc.c,v 1.187 2007/11/26 19:01:32 pooka 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 1.187 2007/11/26 19:01:32 pooka 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 #include <compat/linux/common/linux_ipc.h> 117 #include <compat/linux/common/linux_sem.h> 118 119 #include <compat/linux/linux_syscallargs.h> 120 121 #include <compat/linux/common/linux_fcntl.h> 122 #include <compat/linux/common/linux_mmap.h> 123 #include <compat/linux/common/linux_dirent.h> 124 #include <compat/linux/common/linux_util.h> 125 #include <compat/linux/common/linux_misc.h> 126 #ifndef COMPAT_LINUX32 127 #include <compat/linux/common/linux_statfs.h> 128 #include <compat/linux/common/linux_limit.h> 129 #endif 130 #include <compat/linux/common/linux_ptrace.h> 131 #include <compat/linux/common/linux_reboot.h> 132 #include <compat/linux/common/linux_emuldata.h> 133 134 #ifndef COMPAT_LINUX32 135 const int linux_ptrace_request_map[] = { 136 LINUX_PTRACE_TRACEME, PT_TRACE_ME, 137 LINUX_PTRACE_PEEKTEXT, PT_READ_I, 138 LINUX_PTRACE_PEEKDATA, PT_READ_D, 139 LINUX_PTRACE_POKETEXT, PT_WRITE_I, 140 LINUX_PTRACE_POKEDATA, PT_WRITE_D, 141 LINUX_PTRACE_CONT, PT_CONTINUE, 142 LINUX_PTRACE_KILL, PT_KILL, 143 LINUX_PTRACE_ATTACH, PT_ATTACH, 144 LINUX_PTRACE_DETACH, PT_DETACH, 145 # ifdef PT_STEP 146 LINUX_PTRACE_SINGLESTEP, PT_STEP, 147 # endif 148 LINUX_PTRACE_SYSCALL, PT_SYSCALL, 149 -1 150 }; 151 152 const struct linux_mnttypes linux_fstypes[] = { 153 { MOUNT_FFS, LINUX_DEFAULT_SUPER_MAGIC }, 154 { MOUNT_NFS, LINUX_NFS_SUPER_MAGIC }, 155 { MOUNT_MFS, LINUX_DEFAULT_SUPER_MAGIC }, 156 { MOUNT_MSDOS, LINUX_MSDOS_SUPER_MAGIC }, 157 { MOUNT_LFS, LINUX_DEFAULT_SUPER_MAGIC }, 158 { MOUNT_FDESC, LINUX_DEFAULT_SUPER_MAGIC }, 159 { MOUNT_PORTAL, LINUX_DEFAULT_SUPER_MAGIC }, 160 { MOUNT_NULL, LINUX_DEFAULT_SUPER_MAGIC }, 161 { MOUNT_OVERLAY, LINUX_DEFAULT_SUPER_MAGIC }, 162 { MOUNT_UMAP, LINUX_DEFAULT_SUPER_MAGIC }, 163 { MOUNT_KERNFS, LINUX_DEFAULT_SUPER_MAGIC }, 164 { MOUNT_PROCFS, LINUX_PROC_SUPER_MAGIC }, 165 { MOUNT_AFS, LINUX_DEFAULT_SUPER_MAGIC }, 166 { MOUNT_CD9660, LINUX_ISOFS_SUPER_MAGIC }, 167 { MOUNT_UNION, LINUX_DEFAULT_SUPER_MAGIC }, 168 { MOUNT_ADOSFS, LINUX_ADFS_SUPER_MAGIC }, 169 { MOUNT_EXT2FS, LINUX_EXT2_SUPER_MAGIC }, 170 { MOUNT_CFS, LINUX_DEFAULT_SUPER_MAGIC }, 171 { MOUNT_CODA, LINUX_CODA_SUPER_MAGIC }, 172 { MOUNT_FILECORE, LINUX_DEFAULT_SUPER_MAGIC }, 173 { MOUNT_NTFS, LINUX_DEFAULT_SUPER_MAGIC }, 174 { MOUNT_SMBFS, LINUX_SMB_SUPER_MAGIC }, 175 { MOUNT_PTYFS, LINUX_DEVPTS_SUPER_MAGIC }, 176 { MOUNT_TMPFS, LINUX_DEFAULT_SUPER_MAGIC } 177 }; 178 const int linux_fstypes_cnt = sizeof(linux_fstypes) / sizeof(linux_fstypes[0]); 179 180 # ifdef DEBUG_LINUX 181 #define DPRINTF(a) uprintf a 182 # else 183 #define DPRINTF(a) 184 # endif 185 186 /* Local linux_misc.c functions: */ 187 static void linux_to_bsd_mmap_args __P((struct sys_mmap_args *, 188 const struct linux_sys_mmap_args *)); 189 static int linux_mmap __P((struct lwp *, struct linux_sys_mmap_args *, 190 register_t *, off_t)); 191 192 193 /* 194 * The information on a terminated (or stopped) process needs 195 * to be converted in order for Linux binaries to get a valid signal 196 * number out of it. 197 */ 198 int 199 bsd_to_linux_wstat(int st) 200 { 201 202 int sig; 203 204 if (WIFSIGNALED(st)) { 205 sig = WTERMSIG(st); 206 if (sig >= 0 && sig < NSIG) 207 st= (st & ~0177) | native_to_linux_signo[sig]; 208 } else if (WIFSTOPPED(st)) { 209 sig = WSTOPSIG(st); 210 if (sig >= 0 && sig < NSIG) 211 st = (st & ~0xff00) | 212 (native_to_linux_signo[sig] << 8); 213 } 214 return st; 215 } 216 217 /* 218 * wait4(2). Passed on to the NetBSD call, surrounded by code to 219 * reserve some space for a NetBSD-style wait status, and converting 220 * it to what Linux wants. 221 */ 222 int 223 linux_sys_wait4(l, v, retval) 224 struct lwp *l; 225 void *v; 226 register_t *retval; 227 { 228 struct linux_sys_wait4_args /* { 229 syscallarg(int) pid; 230 syscallarg(int *) status; 231 syscallarg(int) options; 232 syscallarg(struct rusage *) rusage; 233 } */ *uap = v; 234 int error, status, options, linux_options, was_zombie; 235 struct rusage ru; 236 237 linux_options = SCARG(uap, options); 238 options = WOPTSCHECKED; 239 if (linux_options & ~(LINUX_WAIT4_KNOWNFLAGS)) 240 return (EINVAL); 241 242 if (linux_options & LINUX_WAIT4_WNOHANG) 243 options |= WNOHANG; 244 if (linux_options & LINUX_WAIT4_WUNTRACED) 245 options |= WUNTRACED; 246 if (linux_options & LINUX_WAIT4_WALL) 247 options |= WALLSIG; 248 if (linux_options & LINUX_WAIT4_WCLONE) 249 options |= WALTSIG; 250 # ifdef DIAGNOSTIC 251 if (linux_options & LINUX_WAIT4_WNOTHREAD) 252 printf("WARNING: %s: linux process %d.%d called " 253 "waitpid with __WNOTHREAD set!", 254 __FILE__, l->l_proc->p_pid, l->l_lid); 255 256 # endif 257 258 error = do_sys_wait(l, &SCARG(uap, pid), &status, options, 259 SCARG(uap, rusage) != NULL ? &ru : NULL, &was_zombie); 260 261 retval[0] = SCARG(uap, pid); 262 if (SCARG(uap, pid) == 0) 263 return error; 264 265 sigdelset(&l->l_proc->p_sigpend.sp_set, SIGCHLD); /* XXXAD ksiginfo leak */ 266 267 if (SCARG(uap, rusage) != NULL) 268 error = copyout(&ru, SCARG(uap, rusage), sizeof(ru)); 269 270 if (error == 0 && SCARG(uap, status) != NULL) { 271 status = bsd_to_linux_wstat(status); 272 error = copyout(&status, SCARG(uap, status), sizeof status); 273 } 274 275 return error; 276 } 277 278 /* 279 * Linux brk(2). The check if the new address is >= the old one is 280 * done in the kernel in Linux. NetBSD does it in the library. 281 */ 282 int 283 linux_sys_brk(l, v, retval) 284 struct lwp *l; 285 void *v; 286 register_t *retval; 287 { 288 struct linux_sys_brk_args /* { 289 syscallarg(char *) nsize; 290 } */ *uap = v; 291 struct proc *p = l->l_proc; 292 char *nbrk = SCARG(uap, nsize); 293 struct sys_obreak_args oba; 294 struct vmspace *vm = p->p_vmspace; 295 struct linux_emuldata *ed = (struct linux_emuldata*)p->p_emuldata; 296 297 SCARG(&oba, nsize) = nbrk; 298 299 if ((void *) nbrk > vm->vm_daddr && sys_obreak(l, &oba, retval) == 0) 300 ed->s->p_break = (char*)nbrk; 301 else 302 nbrk = ed->s->p_break; 303 304 retval[0] = (register_t)nbrk; 305 306 return 0; 307 } 308 309 /* 310 * Implement the fs stat functions. Straightforward. 311 */ 312 int 313 linux_sys_statfs(l, v, retval) 314 struct lwp *l; 315 void *v; 316 register_t *retval; 317 { 318 struct linux_sys_statfs_args /* { 319 syscallarg(const char *) path; 320 syscallarg(struct linux_statfs *) sp; 321 } */ *uap = v; 322 struct statvfs *sb; 323 struct linux_statfs ltmp; 324 int error; 325 326 sb = STATVFSBUF_GET(); 327 error = do_sys_pstatvfs(l, SCARG(uap, path), ST_WAIT, sb); 328 if (error == 0) { 329 bsd_to_linux_statfs(sb, <mp); 330 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 331 } 332 STATVFSBUF_PUT(sb); 333 334 return error; 335 } 336 337 int 338 linux_sys_fstatfs(l, v, retval) 339 struct lwp *l; 340 void *v; 341 register_t *retval; 342 { 343 struct linux_sys_fstatfs_args /* { 344 syscallarg(int) fd; 345 syscallarg(struct linux_statfs *) sp; 346 } */ *uap = v; 347 struct statvfs *sb; 348 struct linux_statfs ltmp; 349 int error; 350 351 sb = STATVFSBUF_GET(); 352 error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb); 353 if (error == 0) { 354 bsd_to_linux_statfs(sb, <mp); 355 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 356 } 357 STATVFSBUF_PUT(sb); 358 359 return error; 360 } 361 362 /* 363 * uname(). Just copy the info from the various strings stored in the 364 * kernel, and put it in the Linux utsname structure. That structure 365 * is almost the same as the NetBSD one, only it has fields 65 characters 366 * long, and an extra domainname field. 367 */ 368 int 369 linux_sys_uname(struct lwp *l, void *v, register_t *retval) 370 { 371 struct linux_sys_uname_args /* { 372 syscallarg(struct linux_utsname *) up; 373 } */ *uap = v; 374 struct linux_utsname luts; 375 376 strlcpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 377 strlcpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 378 strlcpy(luts.l_release, linux_release, sizeof(luts.l_release)); 379 strlcpy(luts.l_version, linux_version, sizeof(luts.l_version)); 380 strlcpy(luts.l_machine, LINUX_UNAME_ARCH, sizeof(luts.l_machine)); 381 strlcpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 382 383 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 384 } 385 386 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 387 /* Used indirectly on: arm, i386, m68k */ 388 389 /* 390 * New type Linux mmap call. 391 * Only called directly on machines with >= 6 free regs. 392 */ 393 int 394 linux_sys_mmap(l, v, retval) 395 struct lwp *l; 396 void *v; 397 register_t *retval; 398 { 399 struct linux_sys_mmap_args /* { 400 syscallarg(unsigned long) addr; 401 syscallarg(size_t) len; 402 syscallarg(int) prot; 403 syscallarg(int) flags; 404 syscallarg(int) fd; 405 syscallarg(linux_off_t) offset; 406 } */ *uap = v; 407 408 if (SCARG(uap, offset) & PAGE_MASK) 409 return EINVAL; 410 411 return linux_mmap(l, uap, retval, SCARG(uap, offset)); 412 } 413 414 /* 415 * Guts of most architectures' mmap64() implementations. This shares 416 * its list of arguments with linux_sys_mmap(). 417 * 418 * The difference in linux_sys_mmap2() is that "offset" is actually 419 * (offset / pagesize), not an absolute byte count. This translation 420 * to pagesize offsets is done inside glibc between the mmap64() call 421 * point, and the actual syscall. 422 */ 423 int 424 linux_sys_mmap2(l, v, retval) 425 struct lwp *l; 426 void *v; 427 register_t *retval; 428 { 429 struct linux_sys_mmap2_args /* { 430 syscallarg(unsigned long) addr; 431 syscallarg(size_t) len; 432 syscallarg(int) prot; 433 syscallarg(int) flags; 434 syscallarg(int) fd; 435 syscallarg(linux_off_t) offset; 436 } */ *uap = v; 437 438 return linux_mmap(l, uap, retval, 439 ((off_t)SCARG(uap, offset)) << PAGE_SHIFT); 440 } 441 442 /* 443 * Massage arguments and call system mmap(2). 444 */ 445 static int 446 linux_mmap(l, uap, retval, offset) 447 struct lwp *l; 448 struct linux_sys_mmap_args *uap; 449 register_t *retval; 450 off_t offset; 451 { 452 struct sys_mmap_args cma; 453 int error; 454 size_t mmoff=0; 455 456 if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN) { 457 /* 458 * Request for stack-like memory segment. On linux, this 459 * works by mmap()ping (small) segment, which is automatically 460 * extended when page fault happens below the currently 461 * allocated area. We emulate this by allocating (typically 462 * bigger) segment sized at current stack size limit, and 463 * offsetting the requested and returned address accordingly. 464 * Since physical pages are only allocated on-demand, this 465 * is effectively identical. 466 */ 467 rlim_t ssl = l->l_proc->p_rlimit[RLIMIT_STACK].rlim_cur; 468 469 if (SCARG(uap, len) < ssl) { 470 /* Compute the address offset */ 471 mmoff = round_page(ssl) - SCARG(uap, len); 472 473 if (SCARG(uap, addr)) 474 SCARG(uap, addr) -= mmoff; 475 476 SCARG(uap, len) = (size_t) ssl; 477 } 478 } 479 480 linux_to_bsd_mmap_args(&cma, uap); 481 SCARG(&cma, pos) = offset; 482 483 error = sys_mmap(l, &cma, retval); 484 if (error) 485 return (error); 486 487 /* Shift the returned address for stack-like segment if necessary */ 488 if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN && mmoff) 489 retval[0] += mmoff; 490 491 return (0); 492 } 493 494 static void 495 linux_to_bsd_mmap_args(cma, uap) 496 struct sys_mmap_args *cma; 497 const struct linux_sys_mmap_args *uap; 498 { 499 int flags = MAP_TRYFIXED, fl = SCARG(uap, flags); 500 501 flags |= cvtto_bsd_mask(fl, LINUX_MAP_SHARED, MAP_SHARED); 502 flags |= cvtto_bsd_mask(fl, LINUX_MAP_PRIVATE, MAP_PRIVATE); 503 flags |= cvtto_bsd_mask(fl, LINUX_MAP_FIXED, MAP_FIXED); 504 flags |= cvtto_bsd_mask(fl, LINUX_MAP_ANON, MAP_ANON); 505 /* XXX XAX ERH: Any other flags here? There are more defined... */ 506 507 SCARG(cma, addr) = (void *)SCARG(uap, addr); 508 SCARG(cma, len) = SCARG(uap, len); 509 SCARG(cma, prot) = SCARG(uap, prot); 510 if (SCARG(cma, prot) & VM_PROT_WRITE) /* XXX */ 511 SCARG(cma, prot) |= VM_PROT_READ; 512 SCARG(cma, flags) = flags; 513 SCARG(cma, fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 514 SCARG(cma, pad) = 0; 515 } 516 517 #define LINUX_MREMAP_MAYMOVE 1 518 #define LINUX_MREMAP_FIXED 2 519 520 int 521 linux_sys_mremap(l, v, retval) 522 struct lwp *l; 523 void *v; 524 register_t *retval; 525 { 526 struct linux_sys_mremap_args /* { 527 syscallarg(void *) old_address; 528 syscallarg(size_t) old_size; 529 syscallarg(size_t) new_size; 530 syscallarg(u_long) flags; 531 } */ *uap = v; 532 533 struct proc *p; 534 struct vm_map *map; 535 vaddr_t oldva; 536 vaddr_t newva; 537 size_t oldsize; 538 size_t newsize; 539 int flags; 540 int uvmflags; 541 int error; 542 543 flags = SCARG(uap, flags); 544 oldva = (vaddr_t)SCARG(uap, old_address); 545 oldsize = round_page(SCARG(uap, old_size)); 546 newsize = round_page(SCARG(uap, new_size)); 547 if ((flags & ~(LINUX_MREMAP_FIXED|LINUX_MREMAP_MAYMOVE)) != 0) { 548 error = EINVAL; 549 goto done; 550 } 551 if ((flags & LINUX_MREMAP_FIXED) != 0) { 552 if ((flags & LINUX_MREMAP_MAYMOVE) == 0) { 553 error = EINVAL; 554 goto done; 555 } 556 #if 0 /* notyet */ 557 newva = SCARG(uap, new_address); 558 uvmflags = MAP_FIXED; 559 #else /* notyet */ 560 error = EOPNOTSUPP; 561 goto done; 562 #endif /* notyet */ 563 } else if ((flags & LINUX_MREMAP_MAYMOVE) != 0) { 564 uvmflags = 0; 565 } else { 566 newva = oldva; 567 uvmflags = MAP_FIXED; 568 } 569 p = l->l_proc; 570 map = &p->p_vmspace->vm_map; 571 error = uvm_mremap(map, oldva, oldsize, map, &newva, newsize, p, 572 uvmflags); 573 574 done: 575 *retval = (error != 0) ? 0 : (register_t)newva; 576 return error; 577 } 578 579 int 580 linux_sys_msync(l, v, retval) 581 struct lwp *l; 582 void *v; 583 register_t *retval; 584 { 585 struct linux_sys_msync_args /* { 586 syscallarg(void *) addr; 587 syscallarg(int) len; 588 syscallarg(int) fl; 589 } */ *uap = v; 590 591 struct sys___msync13_args bma; 592 593 /* flags are ignored */ 594 SCARG(&bma, addr) = SCARG(uap, addr); 595 SCARG(&bma, len) = SCARG(uap, len); 596 SCARG(&bma, flags) = SCARG(uap, fl); 597 598 return sys___msync13(l, &bma, retval); 599 } 600 601 int 602 linux_sys_mprotect(struct lwp *l, void *v, register_t *retval) 603 { 604 struct linux_sys_mprotect_args /* { 605 syscallarg(const void *) start; 606 syscallarg(unsigned long) len; 607 syscallarg(int) prot; 608 } */ *uap = v; 609 struct vm_map_entry *entry; 610 struct vm_map *map; 611 struct proc *p; 612 vaddr_t end, start, len, stacklim; 613 int prot, grows; 614 615 start = (vaddr_t)SCARG(uap, start); 616 len = round_page(SCARG(uap, len)); 617 prot = SCARG(uap, prot); 618 grows = prot & (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP); 619 prot &= ~grows; 620 end = start + len; 621 622 if (start & PAGE_MASK) 623 return EINVAL; 624 if (end < start) 625 return EINVAL; 626 if (end == start) 627 return 0; 628 629 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) 630 return EINVAL; 631 if (grows == (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP)) 632 return EINVAL; 633 634 p = l->l_proc; 635 map = &p->p_vmspace->vm_map; 636 vm_map_lock(map); 637 # ifdef notdef 638 VM_MAP_RANGE_CHECK(map, start, end); 639 # endif 640 if (!uvm_map_lookup_entry(map, start, &entry) || entry->start > start) { 641 vm_map_unlock(map); 642 return ENOMEM; 643 } 644 645 /* 646 * Approximate the behaviour of PROT_GROWS{DOWN,UP}. 647 */ 648 649 stacklim = (vaddr_t)p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur; 650 if (grows & LINUX_PROT_GROWSDOWN) { 651 if (USRSTACK - stacklim <= start && start < USRSTACK) { 652 start = USRSTACK - stacklim; 653 } else { 654 start = entry->start; 655 } 656 } else if (grows & LINUX_PROT_GROWSUP) { 657 if (USRSTACK <= end && end < USRSTACK + stacklim) { 658 end = USRSTACK + stacklim; 659 } else { 660 end = entry->end; 661 } 662 } 663 vm_map_unlock(map); 664 return uvm_map_protect(map, start, end, prot, FALSE); 665 } 666 667 /* 668 * This code is partly stolen from src/lib/libc/compat-43/times.c 669 */ 670 671 #define CONVTCK(r) (r.tv_sec * hz + r.tv_usec / (1000000 / hz)) 672 673 int 674 linux_sys_times(l, v, retval) 675 struct lwp *l; 676 void *v; 677 register_t *retval; 678 { 679 struct linux_sys_times_args /* { 680 syscallarg(struct times *) tms; 681 } */ *uap = v; 682 struct proc *p = l->l_proc; 683 struct timeval t; 684 int error; 685 686 if (SCARG(uap, tms)) { 687 struct linux_tms ltms; 688 struct rusage ru; 689 690 mutex_enter(&p->p_smutex); 691 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL, NULL); 692 ltms.ltms_utime = CONVTCK(ru.ru_utime); 693 ltms.ltms_stime = CONVTCK(ru.ru_stime); 694 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 695 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 696 mutex_exit(&p->p_smutex); 697 698 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 699 return error; 700 } 701 702 getmicrouptime(&t); 703 704 retval[0] = ((linux_clock_t)(CONVTCK(t))); 705 return 0; 706 } 707 708 #undef CONVTCK 709 710 /* 711 * Linux 'readdir' call. This code is mostly taken from the 712 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 713 * an attempt has been made to keep it a little cleaner (failing 714 * miserably, because of the cruft needed if count 1 is passed). 715 * 716 * The d_off field should contain the offset of the next valid entry, 717 * but in Linux it has the offset of the entry itself. We emulate 718 * that bug here. 719 * 720 * Read in BSD-style entries, convert them, and copy them out. 721 * 722 * Note that this doesn't handle union-mounted filesystems. 723 */ 724 int 725 linux_sys_getdents(l, v, retval) 726 struct lwp *l; 727 void *v; 728 register_t *retval; 729 { 730 struct linux_sys_getdents_args /* { 731 syscallarg(int) fd; 732 syscallarg(struct linux_dirent *) dent; 733 syscallarg(unsigned int) count; 734 } */ *uap = v; 735 struct dirent *bdp; 736 struct vnode *vp; 737 char *inp, *tbuf; /* BSD-format */ 738 int len, reclen; /* BSD-format */ 739 char *outp; /* Linux-format */ 740 int resid, linux_reclen = 0; /* Linux-format */ 741 struct file *fp; 742 struct uio auio; 743 struct iovec aiov; 744 struct linux_dirent idb; 745 off_t off; /* true file offset */ 746 int buflen, error, eofflag, nbytes, oldcall; 747 struct vattr va; 748 off_t *cookiebuf = NULL, *cookie; 749 int ncookies; 750 751 /* getvnode() will use the descriptor for us */ 752 if ((error = getvnode(l->l_proc->p_fd, SCARG(uap, fd), &fp)) != 0) 753 return (error); 754 755 if ((fp->f_flag & FREAD) == 0) { 756 error = EBADF; 757 goto out1; 758 } 759 760 vp = (struct vnode *)fp->f_data; 761 if (vp->v_type != VDIR) { 762 error = EINVAL; 763 goto out1; 764 } 765 766 if ((error = VOP_GETATTR(vp, &va, l->l_cred))) 767 goto out1; 768 769 nbytes = SCARG(uap, count); 770 if (nbytes == 1) { /* emulating old, broken behaviour */ 771 nbytes = sizeof (idb); 772 buflen = max(va.va_blocksize, nbytes); 773 oldcall = 1; 774 } else { 775 buflen = min(MAXBSIZE, nbytes); 776 if (buflen < va.va_blocksize) 777 buflen = va.va_blocksize; 778 oldcall = 0; 779 } 780 tbuf = malloc(buflen, M_TEMP, M_WAITOK); 781 782 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 783 off = fp->f_offset; 784 again: 785 aiov.iov_base = tbuf; 786 aiov.iov_len = buflen; 787 auio.uio_iov = &aiov; 788 auio.uio_iovcnt = 1; 789 auio.uio_rw = UIO_READ; 790 auio.uio_resid = buflen; 791 auio.uio_offset = off; 792 UIO_SETUP_SYSSPACE(&auio); 793 /* 794 * First we read into the malloc'ed buffer, then 795 * we massage it into user space, one record at a time. 796 */ 797 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 798 &ncookies); 799 if (error) 800 goto out; 801 802 inp = tbuf; 803 outp = (void *)SCARG(uap, dent); 804 resid = nbytes; 805 if ((len = buflen - auio.uio_resid) == 0) 806 goto eof; 807 808 for (cookie = cookiebuf; len > 0; len -= reclen) { 809 bdp = (struct dirent *)inp; 810 reclen = bdp->d_reclen; 811 if (reclen & 3) 812 panic("linux_readdir"); 813 if (bdp->d_fileno == 0) { 814 inp += reclen; /* it is a hole; squish it out */ 815 if (cookie) 816 off = *cookie++; 817 else 818 off += reclen; 819 continue; 820 } 821 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 822 if (reclen > len || resid < linux_reclen) { 823 /* entry too big for buffer, so just stop */ 824 outp++; 825 break; 826 } 827 /* 828 * Massage in place to make a Linux-shaped dirent (otherwise 829 * we have to worry about touching user memory outside of 830 * the copyout() call). 831 */ 832 idb.d_ino = bdp->d_fileno; 833 /* 834 * The old readdir() call misuses the offset and reclen fields. 835 */ 836 if (oldcall) { 837 idb.d_off = (linux_off_t)linux_reclen; 838 idb.d_reclen = (u_short)bdp->d_namlen; 839 } else { 840 if (sizeof (idb.d_off) <= 4 && (off >> 32) != 0) { 841 compat_offseterr(vp, "linux_getdents"); 842 error = EINVAL; 843 goto out; 844 } 845 idb.d_off = (linux_off_t)off; 846 idb.d_reclen = (u_short)linux_reclen; 847 } 848 strcpy(idb.d_name, bdp->d_name); 849 if ((error = copyout((void *)&idb, outp, linux_reclen))) 850 goto out; 851 /* advance past this real entry */ 852 inp += reclen; 853 if (cookie) 854 off = *cookie++; /* each entry points to itself */ 855 else 856 off += reclen; 857 /* advance output past Linux-shaped entry */ 858 outp += linux_reclen; 859 resid -= linux_reclen; 860 if (oldcall) 861 break; 862 } 863 864 /* if we squished out the whole block, try again */ 865 if (outp == (void *)SCARG(uap, dent)) 866 goto again; 867 fp->f_offset = off; /* update the vnode offset */ 868 869 if (oldcall) 870 nbytes = resid + linux_reclen; 871 872 eof: 873 *retval = nbytes - resid; 874 out: 875 VOP_UNLOCK(vp, 0); 876 if (cookiebuf) 877 free(cookiebuf, M_TEMP); 878 free(tbuf, M_TEMP); 879 out1: 880 FILE_UNUSE(fp, l); 881 return error; 882 } 883 884 /* 885 * Even when just using registers to pass arguments to syscalls you can 886 * have 5 of them on the i386. So this newer version of select() does 887 * this. 888 */ 889 int 890 linux_sys_select(l, v, retval) 891 struct lwp *l; 892 void *v; 893 register_t *retval; 894 { 895 struct linux_sys_select_args /* { 896 syscallarg(int) nfds; 897 syscallarg(fd_set *) readfds; 898 syscallarg(fd_set *) writefds; 899 syscallarg(fd_set *) exceptfds; 900 syscallarg(struct timeval *) timeout; 901 } */ *uap = v; 902 903 return linux_select1(l, retval, SCARG(uap, nfds), SCARG(uap, readfds), 904 SCARG(uap, writefds), SCARG(uap, exceptfds), SCARG(uap, timeout)); 905 } 906 907 /* 908 * Common code for the old and new versions of select(). A couple of 909 * things are important: 910 * 1) return the amount of time left in the 'timeout' parameter 911 * 2) select never returns ERESTART on Linux, always return EINTR 912 */ 913 int 914 linux_select1(l, retval, nfds, readfds, writefds, exceptfds, timeout) 915 struct lwp *l; 916 register_t *retval; 917 int nfds; 918 fd_set *readfds, *writefds, *exceptfds; 919 struct timeval *timeout; 920 { 921 struct timeval tv0, tv1, utv, *tv = NULL; 922 int error; 923 924 /* 925 * Store current time for computation of the amount of 926 * time left. 927 */ 928 if (timeout) { 929 if ((error = copyin(timeout, &utv, sizeof(utv)))) 930 return error; 931 if (itimerfix(&utv)) { 932 /* 933 * The timeval was invalid. Convert it to something 934 * valid that will act as it does under Linux. 935 */ 936 utv.tv_sec += utv.tv_usec / 1000000; 937 utv.tv_usec %= 1000000; 938 if (utv.tv_usec < 0) { 939 utv.tv_sec -= 1; 940 utv.tv_usec += 1000000; 941 } 942 if (utv.tv_sec < 0) 943 timerclear(&utv); 944 } 945 tv = &utv; 946 microtime(&tv0); 947 } 948 949 error = selcommon(l, retval, nfds, readfds, writefds, exceptfds, 950 tv, NULL); 951 952 if (error) { 953 /* 954 * See fs/select.c in the Linux kernel. Without this, 955 * Maelstrom doesn't work. 956 */ 957 if (error == ERESTART) 958 error = EINTR; 959 return error; 960 } 961 962 if (timeout) { 963 if (*retval) { 964 /* 965 * Compute how much time was left of the timeout, 966 * by subtracting the current time and the time 967 * before we started the call, and subtracting 968 * that result from the user-supplied value. 969 */ 970 microtime(&tv1); 971 timersub(&tv1, &tv0, &tv1); 972 timersub(&utv, &tv1, &utv); 973 if (utv.tv_sec < 0) 974 timerclear(&utv); 975 } else 976 timerclear(&utv); 977 if ((error = copyout(&utv, timeout, sizeof(utv)))) 978 return error; 979 } 980 981 return 0; 982 } 983 984 /* 985 * Get the process group of a certain process. Look it up 986 * and return the value. 987 */ 988 int 989 linux_sys_getpgid(l, v, retval) 990 struct lwp *l; 991 void *v; 992 register_t *retval; 993 { 994 struct linux_sys_getpgid_args /* { 995 syscallarg(int) pid; 996 } */ *uap = v; 997 struct proc *p = l->l_proc; 998 struct proc *targp; 999 1000 if (SCARG(uap, pid) != 0 && SCARG(uap, pid) != p->p_pid) { 1001 if ((targp = pfind(SCARG(uap, pid))) == 0) 1002 return ESRCH; 1003 } 1004 else 1005 targp = p; 1006 1007 retval[0] = targp->p_pgid; 1008 return 0; 1009 } 1010 1011 /* 1012 * Set the 'personality' (emulation mode) for the current process. Only 1013 * accept the Linux personality here (0). This call is needed because 1014 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 1015 * ELF binaries run in Linux mode, not SVR4 mode. 1016 */ 1017 int 1018 linux_sys_personality(struct lwp *l, void *v, register_t *retval) 1019 { 1020 struct linux_sys_personality_args /* { 1021 syscallarg(int) per; 1022 } */ *uap = v; 1023 1024 if (SCARG(uap, per) != 0) 1025 return EINVAL; 1026 retval[0] = 0; 1027 return 0; 1028 } 1029 #endif /* !COMPAT_LINUX32 */ 1030 1031 #if defined(__i386__) || defined(__m68k__) || defined(COMPAT_LINUX32) 1032 /* 1033 * The calls are here because of type conversions. 1034 */ 1035 #ifndef COMPAT_LINUX32 1036 int 1037 linux_sys_setreuid16(l, v, retval) 1038 struct lwp *l; 1039 void *v; 1040 register_t *retval; 1041 { 1042 struct linux_sys_setreuid16_args /* { 1043 syscallarg(int) ruid; 1044 syscallarg(int) euid; 1045 } */ *uap = v; 1046 struct sys_setreuid_args bsa; 1047 1048 SCARG(&bsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 1049 (uid_t)-1 : SCARG(uap, ruid); 1050 SCARG(&bsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 1051 (uid_t)-1 : SCARG(uap, euid); 1052 1053 return sys_setreuid(l, &bsa, retval); 1054 } 1055 1056 int 1057 linux_sys_setregid16(l, v, retval) 1058 struct lwp *l; 1059 void *v; 1060 register_t *retval; 1061 { 1062 struct linux_sys_setregid16_args /* { 1063 syscallarg(int) rgid; 1064 syscallarg(int) egid; 1065 } */ *uap = v; 1066 struct sys_setregid_args bsa; 1067 1068 SCARG(&bsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 1069 (uid_t)-1 : SCARG(uap, rgid); 1070 SCARG(&bsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 1071 (uid_t)-1 : SCARG(uap, egid); 1072 1073 return sys_setregid(l, &bsa, retval); 1074 } 1075 1076 int 1077 linux_sys_setresuid16(l, v, retval) 1078 struct lwp *l; 1079 void *v; 1080 register_t *retval; 1081 { 1082 struct linux_sys_setresuid16_args /* { 1083 syscallarg(uid_t) ruid; 1084 syscallarg(uid_t) euid; 1085 syscallarg(uid_t) suid; 1086 } */ *uap = v; 1087 struct linux_sys_setresuid16_args lsa; 1088 1089 SCARG(&lsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 1090 (uid_t)-1 : SCARG(uap, ruid); 1091 SCARG(&lsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 1092 (uid_t)-1 : SCARG(uap, euid); 1093 SCARG(&lsa, suid) = ((linux_uid_t)SCARG(uap, suid) == (linux_uid_t)-1) ? 1094 (uid_t)-1 : SCARG(uap, suid); 1095 1096 return linux_sys_setresuid(l, &lsa, retval); 1097 } 1098 1099 int 1100 linux_sys_setresgid16(l, v, retval) 1101 struct lwp *l; 1102 void *v; 1103 register_t *retval; 1104 { 1105 struct linux_sys_setresgid16_args /* { 1106 syscallarg(gid_t) rgid; 1107 syscallarg(gid_t) egid; 1108 syscallarg(gid_t) sgid; 1109 } */ *uap = v; 1110 struct linux_sys_setresgid16_args lsa; 1111 1112 SCARG(&lsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 1113 (gid_t)-1 : SCARG(uap, rgid); 1114 SCARG(&lsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 1115 (gid_t)-1 : SCARG(uap, egid); 1116 SCARG(&lsa, sgid) = ((linux_gid_t)SCARG(uap, sgid) == (linux_gid_t)-1) ? 1117 (gid_t)-1 : SCARG(uap, sgid); 1118 1119 return linux_sys_setresgid(l, &lsa, retval); 1120 } 1121 #endif /* COMPAT_LINUX32 */ 1122 1123 int 1124 linux_sys_getgroups16(l, v, retval) 1125 struct lwp *l; 1126 void *v; 1127 register_t *retval; 1128 { 1129 struct linux_sys_getgroups16_args /* { 1130 syscallarg(int) gidsetsize; 1131 syscallarg(linux_gid_t *) gidset; 1132 } */ *uap = v; 1133 linux_gid_t lset[16]; 1134 linux_gid_t *gidset; 1135 unsigned int ngrps; 1136 int i, n, j; 1137 int error; 1138 1139 ngrps = kauth_cred_ngroups(l->l_cred); 1140 *retval = ngrps; 1141 if (SCARG(uap, gidsetsize) == 0) 1142 return 0; 1143 if (SCARG(uap, gidsetsize) < ngrps) 1144 return EINVAL; 1145 1146 gidset = SCARG(uap, gidset); 1147 for (i = 0; i < (n = ngrps); i += n, gidset += n) { 1148 n -= i; 1149 if (n > __arraycount(lset)) 1150 n = __arraycount(lset); 1151 for (j = 0; j < n; j++) 1152 lset[j] = kauth_cred_group(l->l_cred, i + j); 1153 error = copyout(lset, gidset, n * sizeof(lset[0])); 1154 if (error != 0) 1155 return error; 1156 } 1157 1158 return 0; 1159 } 1160 1161 /* 1162 * It is very unlikly that any problem using 16bit groups is written 1163 * to allow for more than 16 of them, so don't bother trying to 1164 * support that. 1165 */ 1166 #define COMPAT_NGROUPS16 16 1167 1168 int 1169 linux_sys_setgroups16(l, v, retval) 1170 struct lwp *l; 1171 void *v; 1172 register_t *retval; 1173 { 1174 struct linux_sys_setgroups16_args /* { 1175 syscallarg(int) gidsetsize; 1176 syscallarg(linux_gid_t *) gidset; 1177 } */ *uap = v; 1178 linux_gid_t lset[COMPAT_NGROUPS16]; 1179 kauth_cred_t ncred; 1180 int error; 1181 gid_t grbuf[COMPAT_NGROUPS16]; 1182 unsigned int i, ngroups = SCARG(uap, gidsetsize); 1183 1184 if (ngroups > COMPAT_NGROUPS16) 1185 return EINVAL; 1186 error = copyin(SCARG(uap, gidset), lset, ngroups); 1187 if (error != 0) 1188 return error; 1189 1190 for (i = 0; i < ngroups; i++) 1191 grbuf[i] = lset[i]; 1192 1193 ncred = kauth_cred_alloc(); 1194 error = kauth_cred_setgroups(ncred, grbuf, SCARG(uap, gidsetsize), 1195 -1, UIO_SYSSPACE); 1196 if (error != 0) { 1197 kauth_cred_free(ncred); 1198 return error; 1199 } 1200 1201 return kauth_proc_setgroups(l, ncred); 1202 } 1203 1204 #endif /* __i386__ || __m68k__ || COMPAT_LINUX32 */ 1205 1206 #ifndef COMPAT_LINUX32 1207 /* 1208 * We have nonexistent fsuid equal to uid. 1209 * If modification is requested, refuse. 1210 */ 1211 int 1212 linux_sys_setfsuid(l, v, retval) 1213 struct lwp *l; 1214 void *v; 1215 register_t *retval; 1216 { 1217 struct linux_sys_setfsuid_args /* { 1218 syscallarg(uid_t) uid; 1219 } */ *uap = v; 1220 uid_t uid; 1221 1222 uid = SCARG(uap, uid); 1223 if (kauth_cred_getuid(l->l_cred) != uid) 1224 return sys_nosys(l, v, retval); 1225 else 1226 return (0); 1227 } 1228 1229 /* XXX XXX XXX */ 1230 # ifndef alpha 1231 int 1232 linux_sys_getfsuid(l, v, retval) 1233 struct lwp *l; 1234 void *v; 1235 register_t *retval; 1236 { 1237 return sys_getuid(l, v, retval); 1238 } 1239 # endif 1240 1241 int 1242 linux_sys_setresuid(struct lwp *l, void *v, register_t *retval) 1243 { 1244 struct linux_sys_setresuid_args /* { 1245 syscallarg(uid_t) ruid; 1246 syscallarg(uid_t) euid; 1247 syscallarg(uid_t) suid; 1248 } */ *uap = v; 1249 1250 /* 1251 * Note: These checks are a little different than the NetBSD 1252 * setreuid(2) call performs. This precisely follows the 1253 * behavior of the Linux kernel. 1254 */ 1255 1256 return do_setresuid(l, SCARG(uap, ruid), SCARG(uap, euid), 1257 SCARG(uap, suid), 1258 ID_R_EQ_R | ID_R_EQ_E | ID_R_EQ_S | 1259 ID_E_EQ_R | ID_E_EQ_E | ID_E_EQ_S | 1260 ID_S_EQ_R | ID_S_EQ_E | ID_S_EQ_S ); 1261 } 1262 1263 int 1264 linux_sys_getresuid(struct lwp *l, void *v, register_t *retval) 1265 { 1266 struct linux_sys_getresuid_args /* { 1267 syscallarg(uid_t *) ruid; 1268 syscallarg(uid_t *) euid; 1269 syscallarg(uid_t *) suid; 1270 } */ *uap = v; 1271 kauth_cred_t pc = l->l_cred; 1272 int error; 1273 uid_t uid; 1274 1275 /* 1276 * Linux copies these values out to userspace like so: 1277 * 1278 * 1. Copy out ruid. 1279 * 2. If that succeeds, copy out euid. 1280 * 3. If both of those succeed, copy out suid. 1281 */ 1282 uid = kauth_cred_getuid(pc); 1283 if ((error = copyout(&uid, SCARG(uap, ruid), sizeof(uid_t))) != 0) 1284 return (error); 1285 1286 uid = kauth_cred_geteuid(pc); 1287 if ((error = copyout(&uid, SCARG(uap, euid), sizeof(uid_t))) != 0) 1288 return (error); 1289 1290 uid = kauth_cred_getsvuid(pc); 1291 1292 return (copyout(&uid, 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 #if defined(PTRACE) || defined(_LKM) 1302 struct linux_sys_ptrace_args /* { 1303 i386, m68k, powerpc: T=int 1304 alpha, amd64: T=long 1305 syscallarg(T) request; 1306 syscallarg(T) pid; 1307 syscallarg(T) addr; 1308 syscallarg(T) data; 1309 } */ *uap = v; 1310 const int *ptr; 1311 int request; 1312 int error; 1313 #ifdef _LKM 1314 #define sys_ptrace (*sysent[SYS_ptrace].sy_call) 1315 #endif 1316 1317 ptr = linux_ptrace_request_map; 1318 request = SCARG(uap, request); 1319 while (*ptr != -1) 1320 if (*ptr++ == request) { 1321 struct sys_ptrace_args pta; 1322 1323 SCARG(&pta, req) = *ptr; 1324 SCARG(&pta, pid) = SCARG(uap, pid); 1325 SCARG(&pta, addr) = (void *)SCARG(uap, addr); 1326 SCARG(&pta, data) = SCARG(uap, data); 1327 1328 /* 1329 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1330 * to continue where the process left off previously. 1331 * The same thing is achieved by addr == (void *) 1 1332 * on NetBSD, so rewrite 'addr' appropriately. 1333 */ 1334 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1335 SCARG(&pta, addr) = (void *) 1; 1336 1337 error = sys_ptrace(l, &pta, retval); 1338 if (error) 1339 return error; 1340 switch (request) { 1341 case LINUX_PTRACE_PEEKTEXT: 1342 case LINUX_PTRACE_PEEKDATA: 1343 error = copyout (retval, 1344 (void *)SCARG(uap, data), 1345 sizeof *retval); 1346 *retval = SCARG(uap, data); 1347 break; 1348 default: 1349 break; 1350 } 1351 return error; 1352 } 1353 else 1354 ptr++; 1355 1356 return LINUX_SYS_PTRACE_ARCH(l, uap, retval); 1357 #else 1358 return ENOSYS; 1359 #endif /* PTRACE || _LKM */ 1360 } 1361 1362 int 1363 linux_sys_reboot(struct lwp *l, void *v, register_t *retval) 1364 { 1365 struct linux_sys_reboot_args /* { 1366 syscallarg(int) magic1; 1367 syscallarg(int) magic2; 1368 syscallarg(int) cmd; 1369 syscallarg(void *) arg; 1370 } */ *uap = v; 1371 struct sys_reboot_args /* { 1372 syscallarg(int) opt; 1373 syscallarg(char *) bootstr; 1374 } */ sra; 1375 int error; 1376 1377 if ((error = kauth_authorize_system(l->l_cred, 1378 KAUTH_SYSTEM_REBOOT, 0, NULL, NULL, NULL)) != 0) 1379 return(error); 1380 1381 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1382 return(EINVAL); 1383 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1384 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1385 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1386 return(EINVAL); 1387 1388 switch (SCARG(uap, cmd)) { 1389 case LINUX_REBOOT_CMD_RESTART: 1390 SCARG(&sra, opt) = RB_AUTOBOOT; 1391 break; 1392 case LINUX_REBOOT_CMD_HALT: 1393 SCARG(&sra, opt) = RB_HALT; 1394 break; 1395 case LINUX_REBOOT_CMD_POWER_OFF: 1396 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1397 break; 1398 case LINUX_REBOOT_CMD_RESTART2: 1399 /* Reboot with an argument. */ 1400 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1401 SCARG(&sra, bootstr) = SCARG(uap, arg); 1402 break; 1403 case LINUX_REBOOT_CMD_CAD_ON: 1404 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1405 case LINUX_REBOOT_CMD_CAD_OFF: 1406 return(0); 1407 default: 1408 return(EINVAL); 1409 } 1410 1411 return(sys_reboot(l, &sra, retval)); 1412 } 1413 1414 /* 1415 * Copy of compat_12_sys_swapon(). 1416 */ 1417 int 1418 linux_sys_swapon(l, v, retval) 1419 struct lwp *l; 1420 void *v; 1421 register_t *retval; 1422 { 1423 struct sys_swapctl_args ua; 1424 struct linux_sys_swapon_args /* { 1425 syscallarg(const char *) name; 1426 } */ *uap = v; 1427 1428 SCARG(&ua, cmd) = SWAP_ON; 1429 SCARG(&ua, arg) = (void *)__UNCONST(SCARG(uap, name)); 1430 SCARG(&ua, misc) = 0; /* priority */ 1431 return (sys_swapctl(l, &ua, retval)); 1432 } 1433 1434 /* 1435 * Stop swapping to the file or block device specified by path. 1436 */ 1437 int 1438 linux_sys_swapoff(l, v, retval) 1439 struct lwp *l; 1440 void *v; 1441 register_t *retval; 1442 { 1443 struct sys_swapctl_args ua; 1444 struct linux_sys_swapoff_args /* { 1445 syscallarg(const char *) path; 1446 } */ *uap = v; 1447 1448 SCARG(&ua, cmd) = SWAP_OFF; 1449 SCARG(&ua, arg) = __UNCONST(SCARG(uap, path)); /*XXXUNCONST*/ 1450 return (sys_swapctl(l, &ua, retval)); 1451 } 1452 1453 /* 1454 * Copy of compat_09_sys_setdomainname() 1455 */ 1456 /* ARGSUSED */ 1457 int 1458 linux_sys_setdomainname(struct lwp *l, void *v, register_t *retval) 1459 { 1460 struct linux_sys_setdomainname_args /* { 1461 syscallarg(char *) domainname; 1462 syscallarg(int) len; 1463 } */ *uap = v; 1464 int name[2]; 1465 1466 name[0] = CTL_KERN; 1467 name[1] = KERN_DOMAINNAME; 1468 return (old_sysctl(&name[0], 2, 0, 0, SCARG(uap, domainname), 1469 SCARG(uap, len), l)); 1470 } 1471 1472 /* 1473 * sysinfo() 1474 */ 1475 /* ARGSUSED */ 1476 int 1477 linux_sys_sysinfo(struct lwp *l, void *v, register_t *retval) 1478 { 1479 struct linux_sys_sysinfo_args /* { 1480 syscallarg(struct linux_sysinfo *) arg; 1481 } */ *uap = v; 1482 struct linux_sysinfo si; 1483 struct loadavg *la; 1484 1485 si.uptime = time_uptime; 1486 la = &averunnable; 1487 si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1488 si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1489 si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1490 si.totalram = ctob((u_long)physmem); 1491 si.freeram = (u_long)uvmexp.free * uvmexp.pagesize; 1492 si.sharedram = 0; /* XXX */ 1493 si.bufferram = (u_long)uvmexp.filepages * uvmexp.pagesize; 1494 si.totalswap = (u_long)uvmexp.swpages * uvmexp.pagesize; 1495 si.freeswap = 1496 (u_long)(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 int 1508 linux_sys_getrlimit(l, v, retval) 1509 struct lwp *l; 1510 void *v; 1511 register_t *retval; 1512 { 1513 struct linux_sys_getrlimit_args /* { 1514 syscallarg(int) which; 1515 # ifdef LINUX_LARGEFILE64 1516 syscallarg(struct rlimit *) rlp; 1517 # else 1518 syscallarg(struct orlimit *) rlp; 1519 # endif 1520 } */ *uap = v; 1521 # ifdef LINUX_LARGEFILE64 1522 struct rlimit orl; 1523 # else 1524 struct orlimit orl; 1525 # endif 1526 int which; 1527 1528 which = linux_to_bsd_limit(SCARG(uap, which)); 1529 if (which < 0) 1530 return -which; 1531 1532 bsd_to_linux_rlimit(&orl, &l->l_proc->p_rlimit[which]); 1533 1534 return copyout(&orl, SCARG(uap, rlp), sizeof(orl)); 1535 } 1536 1537 int 1538 linux_sys_setrlimit(l, v, retval) 1539 struct lwp *l; 1540 void *v; 1541 register_t *retval; 1542 { 1543 struct linux_sys_setrlimit_args /* { 1544 syscallarg(int) which; 1545 # ifdef LINUX_LARGEFILE64 1546 syscallarg(struct rlimit *) rlp; 1547 # else 1548 syscallarg(struct orlimit *) rlp; 1549 # endif 1550 } */ *uap = v; 1551 struct rlimit rl; 1552 # ifdef LINUX_LARGEFILE64 1553 struct rlimit orl; 1554 # else 1555 struct orlimit orl; 1556 # endif 1557 int error; 1558 int which; 1559 1560 if ((error = copyin(SCARG(uap, rlp), &orl, sizeof(orl))) != 0) 1561 return error; 1562 1563 which = linux_to_bsd_limit(SCARG(uap, which)); 1564 if (which < 0) 1565 return -which; 1566 1567 linux_to_bsd_rlimit(&rl, &orl); 1568 return dosetrlimit(l, l->l_proc, which, &rl); 1569 } 1570 1571 # if !defined(__mips__) && !defined(__amd64__) 1572 /* XXX: this doesn't look 100% common, at least mips doesn't have it */ 1573 int 1574 linux_sys_ugetrlimit(l, v, retval) 1575 struct lwp *l; 1576 void *v; 1577 register_t *retval; 1578 { 1579 return linux_sys_getrlimit(l, v, retval); 1580 } 1581 # endif 1582 1583 /* 1584 * This gets called for unsupported syscalls. The difference to sys_nosys() 1585 * is that process does not get SIGSYS, the call just returns with ENOSYS. 1586 * This is the way Linux does it and glibc depends on this behaviour. 1587 */ 1588 int 1589 linux_sys_nosys(struct lwp *l, void *v, 1590 register_t *retval) 1591 { 1592 return (ENOSYS); 1593 } 1594 1595 int 1596 linux_sys_getpriority(l, v, retval) 1597 struct lwp *l; 1598 void *v; 1599 register_t *retval; 1600 { 1601 struct linux_sys_getpriority_args /* { 1602 syscallarg(int) which; 1603 syscallarg(int) who; 1604 } */ *uap = v; 1605 struct sys_getpriority_args bsa; 1606 int error; 1607 1608 SCARG(&bsa, which) = SCARG(uap, which); 1609 SCARG(&bsa, who) = SCARG(uap, who); 1610 1611 if ((error = sys_getpriority(l, &bsa, retval))) 1612 return error; 1613 1614 *retval = NZERO - *retval; 1615 1616 return 0; 1617 } 1618 1619 #endif /* !COMPAT_LINUX32 */ 1620