1 /* $NetBSD: linux_misc.c,v 1.197 2008/04/24 18:39:22 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998, 1999, 2008 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 1.197 2008/04/24 18:39:22 ad 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(struct sys_mmap_args *, 188 const struct linux_sys_mmap_args *); 189 static int linux_mmap(struct lwp *, const 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(struct lwp *l, const struct linux_sys_wait4_args *uap, register_t *retval) 224 { 225 /* { 226 syscallarg(int) pid; 227 syscallarg(int *) status; 228 syscallarg(int) options; 229 syscallarg(struct rusage *) rusage; 230 } */ 231 int error, status, options, linux_options, was_zombie; 232 struct rusage ru; 233 int pid = SCARG(uap, pid); 234 proc_t *p; 235 236 linux_options = SCARG(uap, options); 237 options = WOPTSCHECKED; 238 if (linux_options & ~(LINUX_WAIT4_KNOWNFLAGS)) 239 return (EINVAL); 240 241 if (linux_options & LINUX_WAIT4_WNOHANG) 242 options |= WNOHANG; 243 if (linux_options & LINUX_WAIT4_WUNTRACED) 244 options |= WUNTRACED; 245 if (linux_options & LINUX_WAIT4_WALL) 246 options |= WALLSIG; 247 if (linux_options & LINUX_WAIT4_WCLONE) 248 options |= WALTSIG; 249 # ifdef DIAGNOSTIC 250 if (linux_options & LINUX_WAIT4_WNOTHREAD) 251 printf("WARNING: %s: linux process %d.%d called " 252 "waitpid with __WNOTHREAD set!", 253 __FILE__, l->l_proc->p_pid, l->l_lid); 254 255 # endif 256 257 error = do_sys_wait(l, &pid, &status, options, 258 SCARG(uap, rusage) != NULL ? &ru : NULL, &was_zombie); 259 260 retval[0] = pid; 261 if (pid == 0) 262 return error; 263 264 p = curproc; 265 mutex_enter(p->p_lock); 266 sigdelset(&p->p_sigpend.sp_set, SIGCHLD); /* XXXAD ksiginfo leak */ 267 mutex_exit(p->p_lock); 268 269 if (SCARG(uap, rusage) != NULL) 270 error = copyout(&ru, SCARG(uap, rusage), sizeof(ru)); 271 272 if (error == 0 && SCARG(uap, status) != NULL) { 273 status = bsd_to_linux_wstat(status); 274 error = copyout(&status, SCARG(uap, status), sizeof status); 275 } 276 277 return error; 278 } 279 280 /* 281 * Linux brk(2). The check if the new address is >= the old one is 282 * done in the kernel in Linux. NetBSD does it in the library. 283 */ 284 int 285 linux_sys_brk(struct lwp *l, const struct linux_sys_brk_args *uap, register_t *retval) 286 { 287 /* { 288 syscallarg(char *) nsize; 289 } */ 290 struct proc *p = l->l_proc; 291 char *nbrk = SCARG(uap, nsize); 292 struct sys_obreak_args oba; 293 struct vmspace *vm = p->p_vmspace; 294 struct linux_emuldata *ed = (struct linux_emuldata*)p->p_emuldata; 295 296 SCARG(&oba, nsize) = nbrk; 297 298 if ((void *) nbrk > vm->vm_daddr && sys_obreak(l, &oba, retval) == 0) 299 ed->s->p_break = (char*)nbrk; 300 else 301 nbrk = ed->s->p_break; 302 303 retval[0] = (register_t)nbrk; 304 305 return 0; 306 } 307 308 /* 309 * Implement the fs stat functions. Straightforward. 310 */ 311 int 312 linux_sys_statfs(struct lwp *l, const struct linux_sys_statfs_args *uap, register_t *retval) 313 { 314 /* { 315 syscallarg(const char *) path; 316 syscallarg(struct linux_statfs *) sp; 317 } */ 318 struct statvfs *sb; 319 struct linux_statfs ltmp; 320 int error; 321 322 sb = STATVFSBUF_GET(); 323 error = do_sys_pstatvfs(l, SCARG(uap, path), ST_WAIT, sb); 324 if (error == 0) { 325 bsd_to_linux_statfs(sb, <mp); 326 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 327 } 328 STATVFSBUF_PUT(sb); 329 330 return error; 331 } 332 333 int 334 linux_sys_fstatfs(struct lwp *l, const struct linux_sys_fstatfs_args *uap, register_t *retval) 335 { 336 /* { 337 syscallarg(int) fd; 338 syscallarg(struct linux_statfs *) sp; 339 } */ 340 struct statvfs *sb; 341 struct linux_statfs ltmp; 342 int error; 343 344 sb = STATVFSBUF_GET(); 345 error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb); 346 if (error == 0) { 347 bsd_to_linux_statfs(sb, <mp); 348 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 349 } 350 STATVFSBUF_PUT(sb); 351 352 return error; 353 } 354 355 /* 356 * uname(). Just copy the info from the various strings stored in the 357 * kernel, and put it in the Linux utsname structure. That structure 358 * is almost the same as the NetBSD one, only it has fields 65 characters 359 * long, and an extra domainname field. 360 */ 361 int 362 linux_sys_uname(struct lwp *l, const struct linux_sys_uname_args *uap, register_t *retval) 363 { 364 /* { 365 syscallarg(struct linux_utsname *) up; 366 } */ 367 struct linux_utsname luts; 368 369 strlcpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 370 strlcpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 371 strlcpy(luts.l_release, linux_release, sizeof(luts.l_release)); 372 strlcpy(luts.l_version, linux_version, sizeof(luts.l_version)); 373 strlcpy(luts.l_machine, LINUX_UNAME_ARCH, sizeof(luts.l_machine)); 374 strlcpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 375 376 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 377 } 378 379 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 380 /* Used indirectly on: arm, i386, m68k */ 381 382 /* 383 * New type Linux mmap call. 384 * Only called directly on machines with >= 6 free regs. 385 */ 386 int 387 linux_sys_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval) 388 { 389 /* { 390 syscallarg(unsigned long) addr; 391 syscallarg(size_t) len; 392 syscallarg(int) prot; 393 syscallarg(int) flags; 394 syscallarg(int) fd; 395 syscallarg(linux_off_t) offset; 396 } */ 397 398 if (SCARG(uap, offset) & PAGE_MASK) 399 return EINVAL; 400 401 return linux_mmap(l, uap, retval, SCARG(uap, offset)); 402 } 403 404 /* 405 * Guts of most architectures' mmap64() implementations. This shares 406 * its list of arguments with linux_sys_mmap(). 407 * 408 * The difference in linux_sys_mmap2() is that "offset" is actually 409 * (offset / pagesize), not an absolute byte count. This translation 410 * to pagesize offsets is done inside glibc between the mmap64() call 411 * point, and the actual syscall. 412 */ 413 int 414 linux_sys_mmap2(struct lwp *l, const struct linux_sys_mmap2_args *uap, register_t *retval) 415 { 416 /* { 417 syscallarg(unsigned long) addr; 418 syscallarg(size_t) len; 419 syscallarg(int) prot; 420 syscallarg(int) flags; 421 syscallarg(int) fd; 422 syscallarg(linux_off_t) offset; 423 } */ 424 425 return linux_mmap(l, uap, retval, 426 ((off_t)SCARG(uap, offset)) << PAGE_SHIFT); 427 } 428 429 /* 430 * Massage arguments and call system mmap(2). 431 */ 432 static int 433 linux_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval, off_t offset) 434 { 435 struct sys_mmap_args cma; 436 int error; 437 size_t mmoff=0; 438 439 linux_to_bsd_mmap_args(&cma, uap); 440 SCARG(&cma, pos) = offset; 441 442 if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN) { 443 /* 444 * Request for stack-like memory segment. On linux, this 445 * works by mmap()ping (small) segment, which is automatically 446 * extended when page fault happens below the currently 447 * allocated area. We emulate this by allocating (typically 448 * bigger) segment sized at current stack size limit, and 449 * offsetting the requested and returned address accordingly. 450 * Since physical pages are only allocated on-demand, this 451 * is effectively identical. 452 */ 453 rlim_t ssl = l->l_proc->p_rlimit[RLIMIT_STACK].rlim_cur; 454 455 if (SCARG(&cma, len) < ssl) { 456 /* Compute the address offset */ 457 mmoff = round_page(ssl) - SCARG(uap, len); 458 459 if (SCARG(&cma, addr)) 460 SCARG(&cma, addr) = (char *)SCARG(&cma, addr) - mmoff; 461 462 SCARG(&cma, len) = (size_t) ssl; 463 } 464 } 465 466 error = sys_mmap(l, &cma, retval); 467 if (error) 468 return (error); 469 470 /* Shift the returned address for stack-like segment if necessary */ 471 retval[0] += mmoff; 472 473 return (0); 474 } 475 476 static void 477 linux_to_bsd_mmap_args(struct sys_mmap_args *cma, const struct linux_sys_mmap_args *uap) 478 { 479 int flags = MAP_TRYFIXED, fl = SCARG(uap, flags); 480 481 flags |= cvtto_bsd_mask(fl, LINUX_MAP_SHARED, MAP_SHARED); 482 flags |= cvtto_bsd_mask(fl, LINUX_MAP_PRIVATE, MAP_PRIVATE); 483 flags |= cvtto_bsd_mask(fl, LINUX_MAP_FIXED, MAP_FIXED); 484 flags |= cvtto_bsd_mask(fl, LINUX_MAP_ANON, MAP_ANON); 485 /* XXX XAX ERH: Any other flags here? There are more defined... */ 486 487 SCARG(cma, addr) = (void *)SCARG(uap, addr); 488 SCARG(cma, len) = SCARG(uap, len); 489 SCARG(cma, prot) = SCARG(uap, prot); 490 if (SCARG(cma, prot) & VM_PROT_WRITE) /* XXX */ 491 SCARG(cma, prot) |= VM_PROT_READ; 492 SCARG(cma, flags) = flags; 493 SCARG(cma, fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 494 SCARG(cma, pad) = 0; 495 } 496 497 #define LINUX_MREMAP_MAYMOVE 1 498 #define LINUX_MREMAP_FIXED 2 499 500 int 501 linux_sys_mremap(struct lwp *l, const struct linux_sys_mremap_args *uap, register_t *retval) 502 { 503 /* { 504 syscallarg(void *) old_address; 505 syscallarg(size_t) old_size; 506 syscallarg(size_t) new_size; 507 syscallarg(u_long) flags; 508 } */ 509 510 struct proc *p; 511 struct vm_map *map; 512 vaddr_t oldva; 513 vaddr_t newva; 514 size_t oldsize; 515 size_t newsize; 516 int flags; 517 int uvmflags; 518 int error; 519 520 flags = SCARG(uap, flags); 521 oldva = (vaddr_t)SCARG(uap, old_address); 522 oldsize = round_page(SCARG(uap, old_size)); 523 newsize = round_page(SCARG(uap, new_size)); 524 if ((flags & ~(LINUX_MREMAP_FIXED|LINUX_MREMAP_MAYMOVE)) != 0) { 525 error = EINVAL; 526 goto done; 527 } 528 if ((flags & LINUX_MREMAP_FIXED) != 0) { 529 if ((flags & LINUX_MREMAP_MAYMOVE) == 0) { 530 error = EINVAL; 531 goto done; 532 } 533 #if 0 /* notyet */ 534 newva = SCARG(uap, new_address); 535 uvmflags = MAP_FIXED; 536 #else /* notyet */ 537 error = EOPNOTSUPP; 538 goto done; 539 #endif /* notyet */ 540 } else if ((flags & LINUX_MREMAP_MAYMOVE) != 0) { 541 uvmflags = 0; 542 } else { 543 newva = oldva; 544 uvmflags = MAP_FIXED; 545 } 546 p = l->l_proc; 547 map = &p->p_vmspace->vm_map; 548 error = uvm_mremap(map, oldva, oldsize, map, &newva, newsize, p, 549 uvmflags); 550 551 done: 552 *retval = (error != 0) ? 0 : (register_t)newva; 553 return error; 554 } 555 556 int 557 linux_sys_mprotect(struct lwp *l, const struct linux_sys_mprotect_args *uap, register_t *retval) 558 { 559 /* { 560 syscallarg(const void *) start; 561 syscallarg(unsigned long) len; 562 syscallarg(int) prot; 563 } */ 564 struct vm_map_entry *entry; 565 struct vm_map *map; 566 struct proc *p; 567 vaddr_t end, start, len, stacklim; 568 int prot, grows; 569 570 start = (vaddr_t)SCARG(uap, start); 571 len = round_page(SCARG(uap, len)); 572 prot = SCARG(uap, prot); 573 grows = prot & (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP); 574 prot &= ~grows; 575 end = start + len; 576 577 if (start & PAGE_MASK) 578 return EINVAL; 579 if (end < start) 580 return EINVAL; 581 if (end == start) 582 return 0; 583 584 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) 585 return EINVAL; 586 if (grows == (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP)) 587 return EINVAL; 588 589 p = l->l_proc; 590 map = &p->p_vmspace->vm_map; 591 vm_map_lock(map); 592 # ifdef notdef 593 VM_MAP_RANGE_CHECK(map, start, end); 594 # endif 595 if (!uvm_map_lookup_entry(map, start, &entry) || entry->start > start) { 596 vm_map_unlock(map); 597 return ENOMEM; 598 } 599 600 /* 601 * Approximate the behaviour of PROT_GROWS{DOWN,UP}. 602 */ 603 604 stacklim = (vaddr_t)p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur; 605 if (grows & LINUX_PROT_GROWSDOWN) { 606 if (USRSTACK - stacklim <= start && start < USRSTACK) { 607 start = USRSTACK - stacklim; 608 } else { 609 start = entry->start; 610 } 611 } else if (grows & LINUX_PROT_GROWSUP) { 612 if (USRSTACK <= end && end < USRSTACK + stacklim) { 613 end = USRSTACK + stacklim; 614 } else { 615 end = entry->end; 616 } 617 } 618 vm_map_unlock(map); 619 return uvm_map_protect(map, start, end, prot, FALSE); 620 } 621 622 /* 623 * This code is partly stolen from src/lib/libc/compat-43/times.c 624 */ 625 626 #define CONVTCK(r) (r.tv_sec * hz + r.tv_usec / (1000000 / hz)) 627 628 int 629 linux_sys_times(struct lwp *l, const struct linux_sys_times_args *uap, register_t *retval) 630 { 631 /* { 632 syscallarg(struct times *) tms; 633 } */ 634 struct proc *p = l->l_proc; 635 struct timeval t; 636 int error; 637 638 if (SCARG(uap, tms)) { 639 struct linux_tms ltms; 640 struct rusage ru; 641 642 mutex_enter(p->p_lock); 643 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL, NULL); 644 ltms.ltms_utime = CONVTCK(ru.ru_utime); 645 ltms.ltms_stime = CONVTCK(ru.ru_stime); 646 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 647 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 648 mutex_exit(p->p_lock); 649 650 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 651 return error; 652 } 653 654 getmicrouptime(&t); 655 656 retval[0] = ((linux_clock_t)(CONVTCK(t))); 657 return 0; 658 } 659 660 #undef CONVTCK 661 662 /* 663 * Linux 'readdir' call. This code is mostly taken from the 664 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 665 * an attempt has been made to keep it a little cleaner (failing 666 * miserably, because of the cruft needed if count 1 is passed). 667 * 668 * The d_off field should contain the offset of the next valid entry, 669 * but in Linux it has the offset of the entry itself. We emulate 670 * that bug here. 671 * 672 * Read in BSD-style entries, convert them, and copy them out. 673 * 674 * Note that this doesn't handle union-mounted filesystems. 675 */ 676 int 677 linux_sys_getdents(struct lwp *l, const struct linux_sys_getdents_args *uap, register_t *retval) 678 { 679 /* { 680 syscallarg(int) fd; 681 syscallarg(struct linux_dirent *) dent; 682 syscallarg(unsigned int) count; 683 } */ 684 struct dirent *bdp; 685 struct vnode *vp; 686 char *inp, *tbuf; /* BSD-format */ 687 int len, reclen; /* BSD-format */ 688 char *outp; /* Linux-format */ 689 int resid, linux_reclen = 0; /* Linux-format */ 690 struct file *fp; 691 struct uio auio; 692 struct iovec aiov; 693 struct linux_dirent idb; 694 off_t off; /* true file offset */ 695 int buflen, error, eofflag, nbytes, oldcall; 696 struct vattr va; 697 off_t *cookiebuf = NULL, *cookie; 698 int ncookies; 699 700 /* getvnode() will use the descriptor for us */ 701 if ((error = getvnode(SCARG(uap, fd), &fp)) != 0) 702 return (error); 703 704 if ((fp->f_flag & FREAD) == 0) { 705 error = EBADF; 706 goto out1; 707 } 708 709 vp = (struct vnode *)fp->f_data; 710 if (vp->v_type != VDIR) { 711 error = EINVAL; 712 goto out1; 713 } 714 715 if ((error = VOP_GETATTR(vp, &va, l->l_cred))) 716 goto out1; 717 718 nbytes = SCARG(uap, count); 719 if (nbytes == 1) { /* emulating old, broken behaviour */ 720 nbytes = sizeof (idb); 721 buflen = max(va.va_blocksize, nbytes); 722 oldcall = 1; 723 } else { 724 buflen = min(MAXBSIZE, nbytes); 725 if (buflen < va.va_blocksize) 726 buflen = va.va_blocksize; 727 oldcall = 0; 728 } 729 tbuf = malloc(buflen, M_TEMP, M_WAITOK); 730 731 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 732 off = fp->f_offset; 733 again: 734 aiov.iov_base = tbuf; 735 aiov.iov_len = buflen; 736 auio.uio_iov = &aiov; 737 auio.uio_iovcnt = 1; 738 auio.uio_rw = UIO_READ; 739 auio.uio_resid = buflen; 740 auio.uio_offset = off; 741 UIO_SETUP_SYSSPACE(&auio); 742 /* 743 * First we read into the malloc'ed buffer, then 744 * we massage it into user space, one record at a time. 745 */ 746 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 747 &ncookies); 748 if (error) 749 goto out; 750 751 inp = tbuf; 752 outp = (void *)SCARG(uap, dent); 753 resid = nbytes; 754 if ((len = buflen - auio.uio_resid) == 0) 755 goto eof; 756 757 for (cookie = cookiebuf; len > 0; len -= reclen) { 758 bdp = (struct dirent *)inp; 759 reclen = bdp->d_reclen; 760 if (reclen & 3) 761 panic("linux_readdir"); 762 if (bdp->d_fileno == 0) { 763 inp += reclen; /* it is a hole; squish it out */ 764 if (cookie) 765 off = *cookie++; 766 else 767 off += reclen; 768 continue; 769 } 770 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 771 if (reclen > len || resid < linux_reclen) { 772 /* entry too big for buffer, so just stop */ 773 outp++; 774 break; 775 } 776 /* 777 * Massage in place to make a Linux-shaped dirent (otherwise 778 * we have to worry about touching user memory outside of 779 * the copyout() call). 780 */ 781 idb.d_ino = bdp->d_fileno; 782 /* 783 * The old readdir() call misuses the offset and reclen fields. 784 */ 785 if (oldcall) { 786 idb.d_off = (linux_off_t)linux_reclen; 787 idb.d_reclen = (u_short)bdp->d_namlen; 788 } else { 789 if (sizeof (idb.d_off) <= 4 && (off >> 32) != 0) { 790 compat_offseterr(vp, "linux_getdents"); 791 error = EINVAL; 792 goto out; 793 } 794 idb.d_off = (linux_off_t)off; 795 idb.d_reclen = (u_short)linux_reclen; 796 } 797 strcpy(idb.d_name, bdp->d_name); 798 if ((error = copyout((void *)&idb, outp, linux_reclen))) 799 goto out; 800 /* advance past this real entry */ 801 inp += reclen; 802 if (cookie) 803 off = *cookie++; /* each entry points to itself */ 804 else 805 off += reclen; 806 /* advance output past Linux-shaped entry */ 807 outp += linux_reclen; 808 resid -= linux_reclen; 809 if (oldcall) 810 break; 811 } 812 813 /* if we squished out the whole block, try again */ 814 if (outp == (void *)SCARG(uap, dent)) 815 goto again; 816 fp->f_offset = off; /* update the vnode offset */ 817 818 if (oldcall) 819 nbytes = resid + linux_reclen; 820 821 eof: 822 *retval = nbytes - resid; 823 out: 824 VOP_UNLOCK(vp, 0); 825 if (cookiebuf) 826 free(cookiebuf, M_TEMP); 827 free(tbuf, M_TEMP); 828 out1: 829 fd_putfile(SCARG(uap, fd)); 830 return error; 831 } 832 833 /* 834 * Even when just using registers to pass arguments to syscalls you can 835 * have 5 of them on the i386. So this newer version of select() does 836 * this. 837 */ 838 int 839 linux_sys_select(struct lwp *l, const struct linux_sys_select_args *uap, register_t *retval) 840 { 841 /* { 842 syscallarg(int) nfds; 843 syscallarg(fd_set *) readfds; 844 syscallarg(fd_set *) writefds; 845 syscallarg(fd_set *) exceptfds; 846 syscallarg(struct timeval *) timeout; 847 } */ 848 849 return linux_select1(l, retval, SCARG(uap, nfds), SCARG(uap, readfds), 850 SCARG(uap, writefds), SCARG(uap, exceptfds), SCARG(uap, timeout)); 851 } 852 853 /* 854 * Common code for the old and new versions of select(). A couple of 855 * things are important: 856 * 1) return the amount of time left in the 'timeout' parameter 857 * 2) select never returns ERESTART on Linux, always return EINTR 858 */ 859 int 860 linux_select1(l, retval, nfds, readfds, writefds, exceptfds, timeout) 861 struct lwp *l; 862 register_t *retval; 863 int nfds; 864 fd_set *readfds, *writefds, *exceptfds; 865 struct timeval *timeout; 866 { 867 struct timeval tv0, tv1, utv, *tv = NULL; 868 int error; 869 870 /* 871 * Store current time for computation of the amount of 872 * time left. 873 */ 874 if (timeout) { 875 if ((error = copyin(timeout, &utv, sizeof(utv)))) 876 return error; 877 if (itimerfix(&utv)) { 878 /* 879 * The timeval was invalid. Convert it to something 880 * valid that will act as it does under Linux. 881 */ 882 utv.tv_sec += utv.tv_usec / 1000000; 883 utv.tv_usec %= 1000000; 884 if (utv.tv_usec < 0) { 885 utv.tv_sec -= 1; 886 utv.tv_usec += 1000000; 887 } 888 if (utv.tv_sec < 0) 889 timerclear(&utv); 890 } 891 tv = &utv; 892 microtime(&tv0); 893 } 894 895 error = selcommon(l, retval, nfds, readfds, writefds, exceptfds, 896 tv, NULL); 897 898 if (error) { 899 /* 900 * See fs/select.c in the Linux kernel. Without this, 901 * Maelstrom doesn't work. 902 */ 903 if (error == ERESTART) 904 error = EINTR; 905 return error; 906 } 907 908 if (timeout) { 909 if (*retval) { 910 /* 911 * Compute how much time was left of the timeout, 912 * by subtracting the current time and the time 913 * before we started the call, and subtracting 914 * that result from the user-supplied value. 915 */ 916 microtime(&tv1); 917 timersub(&tv1, &tv0, &tv1); 918 timersub(&utv, &tv1, &utv); 919 if (utv.tv_sec < 0) 920 timerclear(&utv); 921 } else 922 timerclear(&utv); 923 if ((error = copyout(&utv, timeout, sizeof(utv)))) 924 return error; 925 } 926 927 return 0; 928 } 929 930 /* 931 * Set the 'personality' (emulation mode) for the current process. Only 932 * accept the Linux personality here (0). This call is needed because 933 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 934 * ELF binaries run in Linux mode, not SVR4 mode. 935 */ 936 int 937 linux_sys_personality(struct lwp *l, const struct linux_sys_personality_args *uap, register_t *retval) 938 { 939 /* { 940 syscallarg(int) per; 941 } */ 942 943 if (SCARG(uap, per) != 0) 944 return EINVAL; 945 retval[0] = 0; 946 return 0; 947 } 948 949 /* 950 * We have nonexistent fsuid equal to uid. 951 * If modification is requested, refuse. 952 */ 953 int 954 linux_sys_setfsuid(struct lwp *l, const struct linux_sys_setfsuid_args *uap, register_t *retval) 955 { 956 /* { 957 syscallarg(uid_t) uid; 958 } */ 959 uid_t uid; 960 961 uid = SCARG(uap, uid); 962 if (kauth_cred_getuid(l->l_cred) != uid) 963 return sys_nosys(l, uap, retval); 964 965 *retval = uid; 966 return 0; 967 } 968 969 int 970 linux_sys_setfsgid(struct lwp *l, const struct linux_sys_setfsgid_args *uap, register_t *retval) 971 { 972 /* { 973 syscallarg(gid_t) gid; 974 } */ 975 gid_t gid; 976 977 gid = SCARG(uap, gid); 978 if (kauth_cred_getgid(l->l_cred) != gid) 979 return sys_nosys(l, uap, retval); 980 981 *retval = gid; 982 return 0; 983 } 984 985 int 986 linux_sys_setresuid(struct lwp *l, const struct linux_sys_setresuid_args *uap, register_t *retval) 987 { 988 /* { 989 syscallarg(uid_t) ruid; 990 syscallarg(uid_t) euid; 991 syscallarg(uid_t) suid; 992 } */ 993 994 /* 995 * Note: These checks are a little different than the NetBSD 996 * setreuid(2) call performs. This precisely follows the 997 * behavior of the Linux kernel. 998 */ 999 1000 return do_setresuid(l, SCARG(uap, ruid), SCARG(uap, euid), 1001 SCARG(uap, suid), 1002 ID_R_EQ_R | ID_R_EQ_E | ID_R_EQ_S | 1003 ID_E_EQ_R | ID_E_EQ_E | ID_E_EQ_S | 1004 ID_S_EQ_R | ID_S_EQ_E | ID_S_EQ_S ); 1005 } 1006 1007 int 1008 linux_sys_getresuid(struct lwp *l, const struct linux_sys_getresuid_args *uap, register_t *retval) 1009 { 1010 /* { 1011 syscallarg(uid_t *) ruid; 1012 syscallarg(uid_t *) euid; 1013 syscallarg(uid_t *) suid; 1014 } */ 1015 kauth_cred_t pc = l->l_cred; 1016 int error; 1017 uid_t uid; 1018 1019 /* 1020 * Linux copies these values out to userspace like so: 1021 * 1022 * 1. Copy out ruid. 1023 * 2. If that succeeds, copy out euid. 1024 * 3. If both of those succeed, copy out suid. 1025 */ 1026 uid = kauth_cred_getuid(pc); 1027 if ((error = copyout(&uid, SCARG(uap, ruid), sizeof(uid_t))) != 0) 1028 return (error); 1029 1030 uid = kauth_cred_geteuid(pc); 1031 if ((error = copyout(&uid, SCARG(uap, euid), sizeof(uid_t))) != 0) 1032 return (error); 1033 1034 uid = kauth_cred_getsvuid(pc); 1035 1036 return (copyout(&uid, SCARG(uap, suid), sizeof(uid_t))); 1037 } 1038 1039 int 1040 linux_sys_ptrace(struct lwp *l, const struct linux_sys_ptrace_args *uap, register_t *retval) 1041 { 1042 /* { 1043 i386, m68k, powerpc: T=int 1044 alpha, amd64: T=long 1045 syscallarg(T) request; 1046 syscallarg(T) pid; 1047 syscallarg(T) addr; 1048 syscallarg(T) data; 1049 } */ 1050 #if defined(PTRACE) || defined(_LKM) 1051 const int *ptr; 1052 int request; 1053 int error; 1054 #ifdef _LKM 1055 #define sys_ptrace (*sysent[SYS_ptrace].sy_call) 1056 #endif 1057 1058 ptr = linux_ptrace_request_map; 1059 request = SCARG(uap, request); 1060 while (*ptr != -1) 1061 if (*ptr++ == request) { 1062 struct sys_ptrace_args pta; 1063 1064 SCARG(&pta, req) = *ptr; 1065 SCARG(&pta, pid) = SCARG(uap, pid); 1066 SCARG(&pta, addr) = (void *)SCARG(uap, addr); 1067 SCARG(&pta, data) = SCARG(uap, data); 1068 1069 /* 1070 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1071 * to continue where the process left off previously. 1072 * The same thing is achieved by addr == (void *) 1 1073 * on NetBSD, so rewrite 'addr' appropriately. 1074 */ 1075 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1076 SCARG(&pta, addr) = (void *) 1; 1077 1078 error = sys_ptrace(l, &pta, retval); 1079 if (error) 1080 return error; 1081 switch (request) { 1082 case LINUX_PTRACE_PEEKTEXT: 1083 case LINUX_PTRACE_PEEKDATA: 1084 error = copyout (retval, 1085 (void *)SCARG(uap, data), 1086 sizeof *retval); 1087 *retval = SCARG(uap, data); 1088 break; 1089 default: 1090 break; 1091 } 1092 return error; 1093 } 1094 else 1095 ptr++; 1096 1097 return LINUX_SYS_PTRACE_ARCH(l, uap, retval); 1098 #else 1099 return ENOSYS; 1100 #endif /* PTRACE || _LKM */ 1101 } 1102 1103 int 1104 linux_sys_reboot(struct lwp *l, const struct linux_sys_reboot_args *uap, register_t *retval) 1105 { 1106 /* { 1107 syscallarg(int) magic1; 1108 syscallarg(int) magic2; 1109 syscallarg(int) cmd; 1110 syscallarg(void *) arg; 1111 } */ 1112 struct sys_reboot_args /* { 1113 syscallarg(int) opt; 1114 syscallarg(char *) bootstr; 1115 } */ sra; 1116 int error; 1117 1118 if ((error = kauth_authorize_system(l->l_cred, 1119 KAUTH_SYSTEM_REBOOT, 0, NULL, NULL, NULL)) != 0) 1120 return(error); 1121 1122 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1123 return(EINVAL); 1124 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1125 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1126 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1127 return(EINVAL); 1128 1129 switch (SCARG(uap, cmd)) { 1130 case LINUX_REBOOT_CMD_RESTART: 1131 SCARG(&sra, opt) = RB_AUTOBOOT; 1132 break; 1133 case LINUX_REBOOT_CMD_HALT: 1134 SCARG(&sra, opt) = RB_HALT; 1135 break; 1136 case LINUX_REBOOT_CMD_POWER_OFF: 1137 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1138 break; 1139 case LINUX_REBOOT_CMD_RESTART2: 1140 /* Reboot with an argument. */ 1141 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1142 SCARG(&sra, bootstr) = SCARG(uap, arg); 1143 break; 1144 case LINUX_REBOOT_CMD_CAD_ON: 1145 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1146 case LINUX_REBOOT_CMD_CAD_OFF: 1147 return(0); 1148 default: 1149 return(EINVAL); 1150 } 1151 1152 return(sys_reboot(l, &sra, retval)); 1153 } 1154 1155 /* 1156 * Copy of compat_12_sys_swapon(). 1157 */ 1158 int 1159 linux_sys_swapon(struct lwp *l, const struct linux_sys_swapon_args *uap, register_t *retval) 1160 { 1161 /* { 1162 syscallarg(const char *) name; 1163 } */ 1164 struct sys_swapctl_args ua; 1165 1166 SCARG(&ua, cmd) = SWAP_ON; 1167 SCARG(&ua, arg) = (void *)__UNCONST(SCARG(uap, name)); 1168 SCARG(&ua, misc) = 0; /* priority */ 1169 return (sys_swapctl(l, &ua, retval)); 1170 } 1171 1172 /* 1173 * Stop swapping to the file or block device specified by path. 1174 */ 1175 int 1176 linux_sys_swapoff(struct lwp *l, const struct linux_sys_swapoff_args *uap, register_t *retval) 1177 { 1178 /* { 1179 syscallarg(const char *) path; 1180 } */ 1181 struct sys_swapctl_args ua; 1182 1183 SCARG(&ua, cmd) = SWAP_OFF; 1184 SCARG(&ua, arg) = __UNCONST(SCARG(uap, path)); /*XXXUNCONST*/ 1185 return (sys_swapctl(l, &ua, retval)); 1186 } 1187 1188 /* 1189 * Copy of compat_09_sys_setdomainname() 1190 */ 1191 /* ARGSUSED */ 1192 int 1193 linux_sys_setdomainname(struct lwp *l, const struct linux_sys_setdomainname_args *uap, register_t *retval) 1194 { 1195 /* { 1196 syscallarg(char *) domainname; 1197 syscallarg(int) len; 1198 } */ 1199 int name[2]; 1200 1201 name[0] = CTL_KERN; 1202 name[1] = KERN_DOMAINNAME; 1203 return (old_sysctl(&name[0], 2, 0, 0, SCARG(uap, domainname), 1204 SCARG(uap, len), l)); 1205 } 1206 1207 /* 1208 * sysinfo() 1209 */ 1210 /* ARGSUSED */ 1211 int 1212 linux_sys_sysinfo(struct lwp *l, const struct linux_sys_sysinfo_args *uap, register_t *retval) 1213 { 1214 /* { 1215 syscallarg(struct linux_sysinfo *) arg; 1216 } */ 1217 struct linux_sysinfo si; 1218 struct loadavg *la; 1219 1220 si.uptime = time_uptime; 1221 la = &averunnable; 1222 si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1223 si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1224 si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1225 si.totalram = ctob((u_long)physmem); 1226 si.freeram = (u_long)uvmexp.free * uvmexp.pagesize; 1227 si.sharedram = 0; /* XXX */ 1228 si.bufferram = (u_long)uvmexp.filepages * uvmexp.pagesize; 1229 si.totalswap = (u_long)uvmexp.swpages * uvmexp.pagesize; 1230 si.freeswap = 1231 (u_long)(uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize; 1232 si.procs = nprocs; 1233 1234 /* The following are only present in newer Linux kernels. */ 1235 si.totalbig = 0; 1236 si.freebig = 0; 1237 si.mem_unit = 1; 1238 1239 return (copyout(&si, SCARG(uap, arg), sizeof si)); 1240 } 1241 1242 int 1243 linux_sys_getrlimit(struct lwp *l, const struct linux_sys_getrlimit_args *uap, register_t *retval) 1244 { 1245 /* { 1246 syscallarg(int) which; 1247 # ifdef LINUX_LARGEFILE64 1248 syscallarg(struct rlimit *) rlp; 1249 # else 1250 syscallarg(struct orlimit *) rlp; 1251 # endif 1252 } */ 1253 # ifdef LINUX_LARGEFILE64 1254 struct rlimit orl; 1255 # else 1256 struct orlimit orl; 1257 # endif 1258 int which; 1259 1260 which = linux_to_bsd_limit(SCARG(uap, which)); 1261 if (which < 0) 1262 return -which; 1263 1264 bsd_to_linux_rlimit(&orl, &l->l_proc->p_rlimit[which]); 1265 1266 return copyout(&orl, SCARG(uap, rlp), sizeof(orl)); 1267 } 1268 1269 int 1270 linux_sys_setrlimit(struct lwp *l, const struct linux_sys_setrlimit_args *uap, register_t *retval) 1271 { 1272 /* { 1273 syscallarg(int) which; 1274 # ifdef LINUX_LARGEFILE64 1275 syscallarg(struct rlimit *) rlp; 1276 # else 1277 syscallarg(struct orlimit *) rlp; 1278 # endif 1279 } */ 1280 struct rlimit rl; 1281 # ifdef LINUX_LARGEFILE64 1282 struct rlimit orl; 1283 # else 1284 struct orlimit orl; 1285 # endif 1286 int error; 1287 int which; 1288 1289 if ((error = copyin(SCARG(uap, rlp), &orl, sizeof(orl))) != 0) 1290 return error; 1291 1292 which = linux_to_bsd_limit(SCARG(uap, which)); 1293 if (which < 0) 1294 return -which; 1295 1296 linux_to_bsd_rlimit(&rl, &orl); 1297 return dosetrlimit(l, l->l_proc, which, &rl); 1298 } 1299 1300 # if !defined(__mips__) && !defined(__amd64__) 1301 /* XXX: this doesn't look 100% common, at least mips doesn't have it */ 1302 int 1303 linux_sys_ugetrlimit(struct lwp *l, const struct linux_sys_ugetrlimit_args *uap, register_t *retval) 1304 { 1305 return linux_sys_getrlimit(l, (const void *)uap, retval); 1306 } 1307 # endif 1308 1309 /* 1310 * This gets called for unsupported syscalls. The difference to sys_nosys() 1311 * is that process does not get SIGSYS, the call just returns with ENOSYS. 1312 * This is the way Linux does it and glibc depends on this behaviour. 1313 */ 1314 int 1315 linux_sys_nosys(struct lwp *l, const void *v, register_t *retval) 1316 { 1317 return (ENOSYS); 1318 } 1319 1320 int 1321 linux_sys_getpriority(struct lwp *l, const struct linux_sys_getpriority_args *uap, register_t *retval) 1322 { 1323 /* { 1324 syscallarg(int) which; 1325 syscallarg(int) who; 1326 } */ 1327 struct sys_getpriority_args bsa; 1328 int error; 1329 1330 SCARG(&bsa, which) = SCARG(uap, which); 1331 SCARG(&bsa, who) = SCARG(uap, who); 1332 1333 if ((error = sys_getpriority(l, &bsa, retval))) 1334 return error; 1335 1336 *retval = NZERO - *retval; 1337 1338 return 0; 1339 } 1340 1341 #endif /* !COMPAT_LINUX32 */ 1342