1 /* $NetBSD: linux_misc.c,v 1.207 2009/03/29 19:21:19 christos 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Linux compatibility module. Try to deal with various Linux system calls. 35 */ 36 37 /* 38 * These functions have been moved to multiarch to allow 39 * selection of which machines include them to be 40 * determined by the individual files.linux_<arch> files. 41 * 42 * Function in multiarch: 43 * linux_sys_break : linux_break.c 44 * linux_sys_alarm : linux_misc_notalpha.c 45 * linux_sys_getresgid : linux_misc_notalpha.c 46 * linux_sys_nice : linux_misc_notalpha.c 47 * linux_sys_readdir : linux_misc_notalpha.c 48 * linux_sys_setresgid : linux_misc_notalpha.c 49 * linux_sys_time : linux_misc_notalpha.c 50 * linux_sys_utime : linux_misc_notalpha.c 51 * linux_sys_waitpid : linux_misc_notalpha.c 52 * linux_sys_old_mmap : linux_oldmmap.c 53 * linux_sys_oldolduname : linux_oldolduname.c 54 * linux_sys_oldselect : linux_oldselect.c 55 * linux_sys_olduname : linux_olduname.c 56 * linux_sys_pipe : linux_pipe.c 57 */ 58 59 #include <sys/cdefs.h> 60 __KERNEL_RCSID(0, "$NetBSD: linux_misc.c,v 1.207 2009/03/29 19:21:19 christos Exp $"); 61 62 #include <sys/param.h> 63 #include <sys/systm.h> 64 #include <sys/namei.h> 65 #include <sys/proc.h> 66 #include <sys/dirent.h> 67 #include <sys/file.h> 68 #include <sys/stat.h> 69 #include <sys/filedesc.h> 70 #include <sys/ioctl.h> 71 #include <sys/kernel.h> 72 #include <sys/malloc.h> 73 #include <sys/mbuf.h> 74 #include <sys/mman.h> 75 #include <sys/mount.h> 76 #include <sys/prot.h> 77 #include <sys/reboot.h> 78 #include <sys/resource.h> 79 #include <sys/resourcevar.h> 80 #include <sys/select.h> 81 #include <sys/signal.h> 82 #include <sys/signalvar.h> 83 #include <sys/socket.h> 84 #include <sys/time.h> 85 #include <sys/times.h> 86 #include <sys/vnode.h> 87 #include <sys/uio.h> 88 #include <sys/wait.h> 89 #include <sys/utsname.h> 90 #include <sys/unistd.h> 91 #include <sys/vfs_syscalls.h> 92 #include <sys/swap.h> /* for SWAP_ON */ 93 #include <sys/sysctl.h> /* for KERN_DOMAINNAME */ 94 #include <sys/kauth.h> 95 96 #include <sys/ptrace.h> 97 #include <machine/ptrace.h> 98 99 #include <sys/syscall.h> 100 #include <sys/syscallargs.h> 101 102 #include <compat/sys/resource.h> 103 104 #include <compat/linux/common/linux_machdep.h> 105 #include <compat/linux/common/linux_types.h> 106 #include <compat/linux/common/linux_signal.h> 107 #include <compat/linux/common/linux_ipc.h> 108 #include <compat/linux/common/linux_sem.h> 109 110 #include <compat/linux/linux_syscallargs.h> 111 112 #include <compat/linux/common/linux_fcntl.h> 113 #include <compat/linux/common/linux_mmap.h> 114 #include <compat/linux/common/linux_dirent.h> 115 #include <compat/linux/common/linux_util.h> 116 #include <compat/linux/common/linux_misc.h> 117 #ifndef COMPAT_LINUX32 118 #include <compat/linux/common/linux_statfs.h> 119 #include <compat/linux/common/linux_limit.h> 120 #endif 121 #include <compat/linux/common/linux_ptrace.h> 122 #include <compat/linux/common/linux_reboot.h> 123 #include <compat/linux/common/linux_emuldata.h> 124 125 #ifndef COMPAT_LINUX32 126 const int linux_ptrace_request_map[] = { 127 LINUX_PTRACE_TRACEME, PT_TRACE_ME, 128 LINUX_PTRACE_PEEKTEXT, PT_READ_I, 129 LINUX_PTRACE_PEEKDATA, PT_READ_D, 130 LINUX_PTRACE_POKETEXT, PT_WRITE_I, 131 LINUX_PTRACE_POKEDATA, PT_WRITE_D, 132 LINUX_PTRACE_CONT, PT_CONTINUE, 133 LINUX_PTRACE_KILL, PT_KILL, 134 LINUX_PTRACE_ATTACH, PT_ATTACH, 135 LINUX_PTRACE_DETACH, PT_DETACH, 136 # ifdef PT_STEP 137 LINUX_PTRACE_SINGLESTEP, PT_STEP, 138 # endif 139 LINUX_PTRACE_SYSCALL, PT_SYSCALL, 140 -1 141 }; 142 143 const struct linux_mnttypes linux_fstypes[] = { 144 { MOUNT_FFS, LINUX_DEFAULT_SUPER_MAGIC }, 145 { MOUNT_NFS, LINUX_NFS_SUPER_MAGIC }, 146 { MOUNT_MFS, LINUX_DEFAULT_SUPER_MAGIC }, 147 { MOUNT_MSDOS, LINUX_MSDOS_SUPER_MAGIC }, 148 { MOUNT_LFS, LINUX_DEFAULT_SUPER_MAGIC }, 149 { MOUNT_FDESC, LINUX_DEFAULT_SUPER_MAGIC }, 150 { MOUNT_PORTAL, LINUX_DEFAULT_SUPER_MAGIC }, 151 { MOUNT_NULL, LINUX_DEFAULT_SUPER_MAGIC }, 152 { MOUNT_OVERLAY, LINUX_DEFAULT_SUPER_MAGIC }, 153 { MOUNT_UMAP, LINUX_DEFAULT_SUPER_MAGIC }, 154 { MOUNT_KERNFS, LINUX_DEFAULT_SUPER_MAGIC }, 155 { MOUNT_PROCFS, LINUX_PROC_SUPER_MAGIC }, 156 { MOUNT_AFS, LINUX_DEFAULT_SUPER_MAGIC }, 157 { MOUNT_CD9660, LINUX_ISOFS_SUPER_MAGIC }, 158 { MOUNT_UNION, LINUX_DEFAULT_SUPER_MAGIC }, 159 { MOUNT_ADOSFS, LINUX_ADFS_SUPER_MAGIC }, 160 { MOUNT_EXT2FS, LINUX_EXT2_SUPER_MAGIC }, 161 { MOUNT_CFS, LINUX_DEFAULT_SUPER_MAGIC }, 162 { MOUNT_CODA, LINUX_CODA_SUPER_MAGIC }, 163 { MOUNT_FILECORE, LINUX_DEFAULT_SUPER_MAGIC }, 164 { MOUNT_NTFS, LINUX_DEFAULT_SUPER_MAGIC }, 165 { MOUNT_SMBFS, LINUX_SMB_SUPER_MAGIC }, 166 { MOUNT_PTYFS, LINUX_DEVPTS_SUPER_MAGIC }, 167 { MOUNT_TMPFS, LINUX_TMPFS_SUPER_MAGIC } 168 }; 169 const int linux_fstypes_cnt = sizeof(linux_fstypes) / sizeof(linux_fstypes[0]); 170 171 # ifdef DEBUG_LINUX 172 #define DPRINTF(a) uprintf a 173 # else 174 #define DPRINTF(a) 175 # endif 176 177 /* Local linux_misc.c functions: */ 178 static void linux_to_bsd_mmap_args(struct sys_mmap_args *, 179 const struct linux_sys_mmap_args *); 180 static int linux_mmap(struct lwp *, const struct linux_sys_mmap_args *, 181 register_t *, off_t); 182 183 184 /* 185 * The information on a terminated (or stopped) process needs 186 * to be converted in order for Linux binaries to get a valid signal 187 * number out of it. 188 */ 189 int 190 bsd_to_linux_wstat(int st) 191 { 192 193 int sig; 194 195 if (WIFSIGNALED(st)) { 196 sig = WTERMSIG(st); 197 if (sig >= 0 && sig < NSIG) 198 st= (st & ~0177) | native_to_linux_signo[sig]; 199 } else if (WIFSTOPPED(st)) { 200 sig = WSTOPSIG(st); 201 if (sig >= 0 && sig < NSIG) 202 st = (st & ~0xff00) | 203 (native_to_linux_signo[sig] << 8); 204 } 205 return st; 206 } 207 208 /* 209 * wait4(2). Passed on to the NetBSD call, surrounded by code to 210 * reserve some space for a NetBSD-style wait status, and converting 211 * it to what Linux wants. 212 */ 213 int 214 linux_sys_wait4(struct lwp *l, const struct linux_sys_wait4_args *uap, register_t *retval) 215 { 216 /* { 217 syscallarg(int) pid; 218 syscallarg(int *) status; 219 syscallarg(int) options; 220 syscallarg(struct rusage50 *) rusage; 221 } */ 222 int error, status, options, linux_options, was_zombie; 223 struct rusage ru; 224 struct rusage50 ru50; 225 int pid = SCARG(uap, pid); 226 proc_t *p; 227 228 linux_options = SCARG(uap, options); 229 options = WOPTSCHECKED; 230 if (linux_options & ~(LINUX_WAIT4_KNOWNFLAGS)) 231 return (EINVAL); 232 233 if (linux_options & LINUX_WAIT4_WNOHANG) 234 options |= WNOHANG; 235 if (linux_options & LINUX_WAIT4_WUNTRACED) 236 options |= WUNTRACED; 237 if (linux_options & LINUX_WAIT4_WALL) 238 options |= WALLSIG; 239 if (linux_options & LINUX_WAIT4_WCLONE) 240 options |= WALTSIG; 241 # ifdef DIAGNOSTIC 242 if (linux_options & LINUX_WAIT4_WNOTHREAD) 243 printf("WARNING: %s: linux process %d.%d called " 244 "waitpid with __WNOTHREAD set!", 245 __FILE__, l->l_proc->p_pid, l->l_lid); 246 247 # endif 248 249 error = do_sys_wait(l, &pid, &status, options, 250 SCARG(uap, rusage) != NULL ? &ru : NULL, &was_zombie); 251 252 retval[0] = pid; 253 if (pid == 0) 254 return error; 255 256 p = curproc; 257 mutex_enter(p->p_lock); 258 sigdelset(&p->p_sigpend.sp_set, SIGCHLD); /* XXXAD ksiginfo leak */ 259 mutex_exit(p->p_lock); 260 261 if (SCARG(uap, rusage) != NULL) { 262 rusage_to_rusage50(&ru, &ru50); 263 error = copyout(&ru, SCARG(uap, rusage), sizeof(ru)); 264 } 265 266 if (error == 0 && SCARG(uap, status) != NULL) { 267 status = bsd_to_linux_wstat(status); 268 error = copyout(&status, SCARG(uap, status), sizeof status); 269 } 270 271 return error; 272 } 273 274 /* 275 * Linux brk(2). The check if the new address is >= the old one is 276 * done in the kernel in Linux. NetBSD does it in the library. 277 */ 278 int 279 linux_sys_brk(struct lwp *l, const struct linux_sys_brk_args *uap, register_t *retval) 280 { 281 /* { 282 syscallarg(char *) nsize; 283 } */ 284 struct proc *p = l->l_proc; 285 char *nbrk = SCARG(uap, nsize); 286 struct sys_obreak_args oba; 287 struct vmspace *vm = p->p_vmspace; 288 struct linux_emuldata *ed = (struct linux_emuldata*)p->p_emuldata; 289 290 SCARG(&oba, nsize) = nbrk; 291 292 if ((void *) nbrk > vm->vm_daddr && sys_obreak(l, &oba, retval) == 0) 293 ed->s->p_break = (char*)nbrk; 294 else 295 nbrk = ed->s->p_break; 296 297 retval[0] = (register_t)nbrk; 298 299 return 0; 300 } 301 302 /* 303 * Implement the fs stat functions. Straightforward. 304 */ 305 int 306 linux_sys_statfs(struct lwp *l, const struct linux_sys_statfs_args *uap, register_t *retval) 307 { 308 /* { 309 syscallarg(const char *) path; 310 syscallarg(struct linux_statfs *) sp; 311 } */ 312 struct statvfs *sb; 313 struct linux_statfs ltmp; 314 int error; 315 316 sb = STATVFSBUF_GET(); 317 error = do_sys_pstatvfs(l, SCARG(uap, path), ST_WAIT, sb); 318 if (error == 0) { 319 bsd_to_linux_statfs(sb, <mp); 320 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 321 } 322 STATVFSBUF_PUT(sb); 323 324 return error; 325 } 326 327 int 328 linux_sys_fstatfs(struct lwp *l, const struct linux_sys_fstatfs_args *uap, register_t *retval) 329 { 330 /* { 331 syscallarg(int) fd; 332 syscallarg(struct linux_statfs *) sp; 333 } */ 334 struct statvfs *sb; 335 struct linux_statfs ltmp; 336 int error; 337 338 sb = STATVFSBUF_GET(); 339 error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb); 340 if (error == 0) { 341 bsd_to_linux_statfs(sb, <mp); 342 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 343 } 344 STATVFSBUF_PUT(sb); 345 346 return error; 347 } 348 349 /* 350 * uname(). Just copy the info from the various strings stored in the 351 * kernel, and put it in the Linux utsname structure. That structure 352 * is almost the same as the NetBSD one, only it has fields 65 characters 353 * long, and an extra domainname field. 354 */ 355 int 356 linux_sys_uname(struct lwp *l, const struct linux_sys_uname_args *uap, register_t *retval) 357 { 358 /* { 359 syscallarg(struct linux_utsname *) up; 360 } */ 361 struct linux_utsname luts; 362 363 strlcpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 364 strlcpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 365 strlcpy(luts.l_release, linux_release, sizeof(luts.l_release)); 366 strlcpy(luts.l_version, linux_version, sizeof(luts.l_version)); 367 strlcpy(luts.l_machine, LINUX_UNAME_ARCH, sizeof(luts.l_machine)); 368 strlcpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 369 370 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 371 } 372 373 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 374 /* Used indirectly on: arm, i386, m68k */ 375 376 /* 377 * New type Linux mmap call. 378 * Only called directly on machines with >= 6 free regs. 379 */ 380 int 381 linux_sys_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval) 382 { 383 /* { 384 syscallarg(unsigned long) addr; 385 syscallarg(size_t) len; 386 syscallarg(int) prot; 387 syscallarg(int) flags; 388 syscallarg(int) fd; 389 syscallarg(linux_off_t) offset; 390 } */ 391 392 if (SCARG(uap, offset) & PAGE_MASK) 393 return EINVAL; 394 395 return linux_mmap(l, uap, retval, SCARG(uap, offset)); 396 } 397 398 /* 399 * Guts of most architectures' mmap64() implementations. This shares 400 * its list of arguments with linux_sys_mmap(). 401 * 402 * The difference in linux_sys_mmap2() is that "offset" is actually 403 * (offset / pagesize), not an absolute byte count. This translation 404 * to pagesize offsets is done inside glibc between the mmap64() call 405 * point, and the actual syscall. 406 */ 407 int 408 linux_sys_mmap2(struct lwp *l, const struct linux_sys_mmap2_args *uap, register_t *retval) 409 { 410 /* { 411 syscallarg(unsigned long) addr; 412 syscallarg(size_t) len; 413 syscallarg(int) prot; 414 syscallarg(int) flags; 415 syscallarg(int) fd; 416 syscallarg(linux_off_t) offset; 417 } */ 418 419 return linux_mmap(l, uap, retval, 420 ((off_t)SCARG(uap, offset)) << PAGE_SHIFT); 421 } 422 423 /* 424 * Massage arguments and call system mmap(2). 425 */ 426 static int 427 linux_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval, off_t offset) 428 { 429 struct sys_mmap_args cma; 430 int error; 431 size_t mmoff=0; 432 433 linux_to_bsd_mmap_args(&cma, uap); 434 SCARG(&cma, pos) = offset; 435 436 if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN) { 437 /* 438 * Request for stack-like memory segment. On linux, this 439 * works by mmap()ping (small) segment, which is automatically 440 * extended when page fault happens below the currently 441 * allocated area. We emulate this by allocating (typically 442 * bigger) segment sized at current stack size limit, and 443 * offsetting the requested and returned address accordingly. 444 * Since physical pages are only allocated on-demand, this 445 * is effectively identical. 446 */ 447 rlim_t ssl = l->l_proc->p_rlimit[RLIMIT_STACK].rlim_cur; 448 449 if (SCARG(&cma, len) < ssl) { 450 /* Compute the address offset */ 451 mmoff = round_page(ssl) - SCARG(uap, len); 452 453 if (SCARG(&cma, addr)) 454 SCARG(&cma, addr) = (char *)SCARG(&cma, addr) - mmoff; 455 456 SCARG(&cma, len) = (size_t) ssl; 457 } 458 } 459 460 error = sys_mmap(l, &cma, retval); 461 if (error) 462 return (error); 463 464 /* Shift the returned address for stack-like segment if necessary */ 465 retval[0] += mmoff; 466 467 return (0); 468 } 469 470 static void 471 linux_to_bsd_mmap_args(struct sys_mmap_args *cma, const struct linux_sys_mmap_args *uap) 472 { 473 int flags = MAP_TRYFIXED, fl = SCARG(uap, flags); 474 475 flags |= cvtto_bsd_mask(fl, LINUX_MAP_SHARED, MAP_SHARED); 476 flags |= cvtto_bsd_mask(fl, LINUX_MAP_PRIVATE, MAP_PRIVATE); 477 flags |= cvtto_bsd_mask(fl, LINUX_MAP_FIXED, MAP_FIXED); 478 flags |= cvtto_bsd_mask(fl, LINUX_MAP_ANON, MAP_ANON); 479 /* XXX XAX ERH: Any other flags here? There are more defined... */ 480 481 SCARG(cma, addr) = (void *)SCARG(uap, addr); 482 SCARG(cma, len) = SCARG(uap, len); 483 SCARG(cma, prot) = SCARG(uap, prot); 484 if (SCARG(cma, prot) & VM_PROT_WRITE) /* XXX */ 485 SCARG(cma, prot) |= VM_PROT_READ; 486 SCARG(cma, flags) = flags; 487 SCARG(cma, fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 488 SCARG(cma, pad) = 0; 489 } 490 491 #define LINUX_MREMAP_MAYMOVE 1 492 #define LINUX_MREMAP_FIXED 2 493 494 int 495 linux_sys_mremap(struct lwp *l, const struct linux_sys_mremap_args *uap, register_t *retval) 496 { 497 /* { 498 syscallarg(void *) old_address; 499 syscallarg(size_t) old_size; 500 syscallarg(size_t) new_size; 501 syscallarg(u_long) flags; 502 } */ 503 504 struct proc *p; 505 struct vm_map *map; 506 vaddr_t oldva; 507 vaddr_t newva; 508 size_t oldsize; 509 size_t newsize; 510 int flags; 511 int uvmflags; 512 int error; 513 514 flags = SCARG(uap, flags); 515 oldva = (vaddr_t)SCARG(uap, old_address); 516 oldsize = round_page(SCARG(uap, old_size)); 517 newsize = round_page(SCARG(uap, new_size)); 518 if ((flags & ~(LINUX_MREMAP_FIXED|LINUX_MREMAP_MAYMOVE)) != 0) { 519 error = EINVAL; 520 goto done; 521 } 522 if ((flags & LINUX_MREMAP_FIXED) != 0) { 523 if ((flags & LINUX_MREMAP_MAYMOVE) == 0) { 524 error = EINVAL; 525 goto done; 526 } 527 #if 0 /* notyet */ 528 newva = SCARG(uap, new_address); 529 uvmflags = MAP_FIXED; 530 #else /* notyet */ 531 error = EOPNOTSUPP; 532 goto done; 533 #endif /* notyet */ 534 } else if ((flags & LINUX_MREMAP_MAYMOVE) != 0) { 535 uvmflags = 0; 536 } else { 537 newva = oldva; 538 uvmflags = MAP_FIXED; 539 } 540 p = l->l_proc; 541 map = &p->p_vmspace->vm_map; 542 error = uvm_mremap(map, oldva, oldsize, map, &newva, newsize, p, 543 uvmflags); 544 545 done: 546 *retval = (error != 0) ? 0 : (register_t)newva; 547 return error; 548 } 549 550 int 551 linux_sys_mprotect(struct lwp *l, const struct linux_sys_mprotect_args *uap, register_t *retval) 552 { 553 /* { 554 syscallarg(const void *) start; 555 syscallarg(unsigned long) len; 556 syscallarg(int) prot; 557 } */ 558 struct vm_map_entry *entry; 559 struct vm_map *map; 560 struct proc *p; 561 vaddr_t end, start, len, stacklim; 562 int prot, grows; 563 564 start = (vaddr_t)SCARG(uap, start); 565 len = round_page(SCARG(uap, len)); 566 prot = SCARG(uap, prot); 567 grows = prot & (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP); 568 prot &= ~grows; 569 end = start + len; 570 571 if (start & PAGE_MASK) 572 return EINVAL; 573 if (end < start) 574 return EINVAL; 575 if (end == start) 576 return 0; 577 578 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) 579 return EINVAL; 580 if (grows == (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP)) 581 return EINVAL; 582 583 p = l->l_proc; 584 map = &p->p_vmspace->vm_map; 585 vm_map_lock(map); 586 # ifdef notdef 587 VM_MAP_RANGE_CHECK(map, start, end); 588 # endif 589 if (!uvm_map_lookup_entry(map, start, &entry) || entry->start > start) { 590 vm_map_unlock(map); 591 return ENOMEM; 592 } 593 594 /* 595 * Approximate the behaviour of PROT_GROWS{DOWN,UP}. 596 */ 597 598 stacklim = (vaddr_t)p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur; 599 if (grows & LINUX_PROT_GROWSDOWN) { 600 if (USRSTACK - stacklim <= start && start < USRSTACK) { 601 start = USRSTACK - stacklim; 602 } else { 603 start = entry->start; 604 } 605 } else if (grows & LINUX_PROT_GROWSUP) { 606 if (USRSTACK <= end && end < USRSTACK + stacklim) { 607 end = USRSTACK + stacklim; 608 } else { 609 end = entry->end; 610 } 611 } 612 vm_map_unlock(map); 613 return uvm_map_protect(map, start, end, prot, FALSE); 614 } 615 616 /* 617 * This code is partly stolen from src/lib/libc/compat-43/times.c 618 */ 619 620 #define CONVTCK(r) (r.tv_sec * hz + r.tv_usec / (1000000 / hz)) 621 622 int 623 linux_sys_times(struct lwp *l, const struct linux_sys_times_args *uap, register_t *retval) 624 { 625 /* { 626 syscallarg(struct times *) tms; 627 } */ 628 struct proc *p = l->l_proc; 629 struct timeval t; 630 int error; 631 632 if (SCARG(uap, tms)) { 633 struct linux_tms ltms; 634 struct rusage ru; 635 636 mutex_enter(p->p_lock); 637 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL, NULL); 638 ltms.ltms_utime = CONVTCK(ru.ru_utime); 639 ltms.ltms_stime = CONVTCK(ru.ru_stime); 640 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 641 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 642 mutex_exit(p->p_lock); 643 644 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 645 return error; 646 } 647 648 getmicrouptime(&t); 649 650 retval[0] = ((linux_clock_t)(CONVTCK(t))); 651 return 0; 652 } 653 654 #undef CONVTCK 655 656 /* 657 * Linux 'readdir' call. This code is mostly taken from the 658 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 659 * an attempt has been made to keep it a little cleaner (failing 660 * miserably, because of the cruft needed if count 1 is passed). 661 * 662 * The d_off field should contain the offset of the next valid entry, 663 * but in Linux it has the offset of the entry itself. We emulate 664 * that bug here. 665 * 666 * Read in BSD-style entries, convert them, and copy them out. 667 * 668 * Note that this doesn't handle union-mounted filesystems. 669 */ 670 int 671 linux_sys_getdents(struct lwp *l, const struct linux_sys_getdents_args *uap, register_t *retval) 672 { 673 /* { 674 syscallarg(int) fd; 675 syscallarg(struct linux_dirent *) dent; 676 syscallarg(unsigned int) count; 677 } */ 678 struct dirent *bdp; 679 struct vnode *vp; 680 char *inp, *tbuf; /* BSD-format */ 681 int len, reclen; /* BSD-format */ 682 char *outp; /* Linux-format */ 683 int resid, linux_reclen = 0; /* Linux-format */ 684 struct file *fp; 685 struct uio auio; 686 struct iovec aiov; 687 struct linux_dirent idb; 688 off_t off; /* true file offset */ 689 int buflen, error, eofflag, nbytes, oldcall; 690 struct vattr va; 691 off_t *cookiebuf = NULL, *cookie; 692 int ncookies; 693 694 /* fd_getvnode() will use the descriptor for us */ 695 if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0) 696 return (error); 697 698 if ((fp->f_flag & FREAD) == 0) { 699 error = EBADF; 700 goto out1; 701 } 702 703 vp = (struct vnode *)fp->f_data; 704 if (vp->v_type != VDIR) { 705 error = EINVAL; 706 goto out1; 707 } 708 709 if ((error = VOP_GETATTR(vp, &va, l->l_cred))) 710 goto out1; 711 712 nbytes = SCARG(uap, count); 713 if (nbytes == 1) { /* emulating old, broken behaviour */ 714 nbytes = sizeof (idb); 715 buflen = max(va.va_blocksize, nbytes); 716 oldcall = 1; 717 } else { 718 buflen = min(MAXBSIZE, nbytes); 719 if (buflen < va.va_blocksize) 720 buflen = va.va_blocksize; 721 oldcall = 0; 722 } 723 tbuf = malloc(buflen, M_TEMP, M_WAITOK); 724 725 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 726 off = fp->f_offset; 727 again: 728 aiov.iov_base = tbuf; 729 aiov.iov_len = buflen; 730 auio.uio_iov = &aiov; 731 auio.uio_iovcnt = 1; 732 auio.uio_rw = UIO_READ; 733 auio.uio_resid = buflen; 734 auio.uio_offset = off; 735 UIO_SETUP_SYSSPACE(&auio); 736 /* 737 * First we read into the malloc'ed buffer, then 738 * we massage it into user space, one record at a time. 739 */ 740 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 741 &ncookies); 742 if (error) 743 goto out; 744 745 inp = tbuf; 746 outp = (void *)SCARG(uap, dent); 747 resid = nbytes; 748 if ((len = buflen - auio.uio_resid) == 0) 749 goto eof; 750 751 for (cookie = cookiebuf; len > 0; len -= reclen) { 752 bdp = (struct dirent *)inp; 753 reclen = bdp->d_reclen; 754 if (reclen & 3) 755 panic("linux_readdir"); 756 if (bdp->d_fileno == 0) { 757 inp += reclen; /* it is a hole; squish it out */ 758 if (cookie) 759 off = *cookie++; 760 else 761 off += reclen; 762 continue; 763 } 764 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 765 if (reclen > len || resid < linux_reclen) { 766 /* entry too big for buffer, so just stop */ 767 outp++; 768 break; 769 } 770 /* 771 * Massage in place to make a Linux-shaped dirent (otherwise 772 * we have to worry about touching user memory outside of 773 * the copyout() call). 774 */ 775 idb.d_ino = bdp->d_fileno; 776 /* 777 * The old readdir() call misuses the offset and reclen fields. 778 */ 779 if (oldcall) { 780 idb.d_off = (linux_off_t)linux_reclen; 781 idb.d_reclen = (u_short)bdp->d_namlen; 782 } else { 783 if (sizeof (idb.d_off) <= 4 && (off >> 32) != 0) { 784 compat_offseterr(vp, "linux_getdents"); 785 error = EINVAL; 786 goto out; 787 } 788 idb.d_off = (linux_off_t)off; 789 idb.d_reclen = (u_short)linux_reclen; 790 } 791 strcpy(idb.d_name, bdp->d_name); 792 if ((error = copyout((void *)&idb, outp, linux_reclen))) 793 goto out; 794 /* advance past this real entry */ 795 inp += reclen; 796 if (cookie) 797 off = *cookie++; /* each entry points to itself */ 798 else 799 off += reclen; 800 /* advance output past Linux-shaped entry */ 801 outp += linux_reclen; 802 resid -= linux_reclen; 803 if (oldcall) 804 break; 805 } 806 807 /* if we squished out the whole block, try again */ 808 if (outp == (void *)SCARG(uap, dent)) 809 goto again; 810 fp->f_offset = off; /* update the vnode offset */ 811 812 if (oldcall) 813 nbytes = resid + linux_reclen; 814 815 eof: 816 *retval = nbytes - resid; 817 out: 818 VOP_UNLOCK(vp, 0); 819 if (cookiebuf) 820 free(cookiebuf, M_TEMP); 821 free(tbuf, M_TEMP); 822 out1: 823 fd_putfile(SCARG(uap, fd)); 824 return error; 825 } 826 827 /* 828 * Even when just using registers to pass arguments to syscalls you can 829 * have 5 of them on the i386. So this newer version of select() does 830 * this. 831 */ 832 int 833 linux_sys_select(struct lwp *l, const struct linux_sys_select_args *uap, register_t *retval) 834 { 835 /* { 836 syscallarg(int) nfds; 837 syscallarg(fd_set *) readfds; 838 syscallarg(fd_set *) writefds; 839 syscallarg(fd_set *) exceptfds; 840 syscallarg(struct timeval50 *) timeout; 841 } */ 842 843 return linux_select1(l, retval, SCARG(uap, nfds), SCARG(uap, readfds), 844 SCARG(uap, writefds), SCARG(uap, exceptfds), 845 (struct linux_timeval *)SCARG(uap, timeout)); 846 } 847 848 /* 849 * Common code for the old and new versions of select(). A couple of 850 * things are important: 851 * 1) return the amount of time left in the 'timeout' parameter 852 * 2) select never returns ERESTART on Linux, always return EINTR 853 */ 854 int 855 linux_select1(struct lwp *l, register_t *retval, int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct linux_timeval *timeout) 856 { 857 struct timespec ts0, ts1, uts, *ts = NULL; 858 struct linux_timeval ltv; 859 int error; 860 861 /* 862 * Store current time for computation of the amount of 863 * time left. 864 */ 865 if (timeout) { 866 if ((error = copyin(timeout, <v, sizeof(ltv)))) 867 return error; 868 uts.tv_sec = ltv.tv_sec; 869 uts.tv_nsec = ltv.tv_usec * 1000; 870 if (itimespecfix(&uts)) { 871 /* 872 * The timeval was invalid. Convert it to something 873 * valid that will act as it does under Linux. 874 */ 875 uts.tv_sec += uts.tv_nsec / 1000000000; 876 uts.tv_nsec %= 1000000000; 877 if (uts.tv_nsec < 0) { 878 uts.tv_sec -= 1; 879 uts.tv_nsec += 1000000000; 880 } 881 if (uts.tv_sec < 0) 882 timespecclear(&uts); 883 } 884 ts = &uts; 885 nanotime(&ts0); 886 } 887 888 error = selcommon(l, retval, nfds, readfds, writefds, exceptfds, 889 ts, NULL); 890 891 if (error) { 892 /* 893 * See fs/select.c in the Linux kernel. Without this, 894 * Maelstrom doesn't work. 895 */ 896 if (error == ERESTART) 897 error = EINTR; 898 return error; 899 } 900 901 if (timeout) { 902 if (*retval) { 903 /* 904 * Compute how much time was left of the timeout, 905 * by subtracting the current time and the time 906 * before we started the call, and subtracting 907 * that result from the user-supplied value. 908 */ 909 nanotime(&ts1); 910 timespecsub(&ts1, &ts0, &ts1); 911 timespecsub(&uts, &ts1, &uts); 912 if (uts.tv_sec < 0) 913 timespecclear(&uts); 914 } else 915 timespecclear(&uts); 916 ltv.tv_sec = uts.tv_sec; 917 ltv.tv_usec = uts.tv_nsec / 1000; 918 if ((error = copyout(<v, timeout, sizeof(ltv)))) 919 return error; 920 } 921 922 return 0; 923 } 924 925 /* 926 * Set the 'personality' (emulation mode) for the current process. Only 927 * accept the Linux personality here (0). This call is needed because 928 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 929 * ELF binaries run in Linux mode, not SVR4 mode. 930 */ 931 int 932 linux_sys_personality(struct lwp *l, const struct linux_sys_personality_args *uap, register_t *retval) 933 { 934 /* { 935 syscallarg(int) per; 936 } */ 937 938 switch (SCARG(uap, per)) { 939 case LINUX_PER_LINUX: 940 case LINUX_PER_QUERY: 941 break; 942 default: 943 return EINVAL; 944 } 945 946 retval[0] = LINUX_PER_LINUX; 947 return 0; 948 } 949 950 /* 951 * We have nonexistent fsuid equal to uid. 952 * If modification is requested, refuse. 953 */ 954 int 955 linux_sys_setfsuid(struct lwp *l, const struct linux_sys_setfsuid_args *uap, register_t *retval) 956 { 957 /* { 958 syscallarg(uid_t) uid; 959 } */ 960 uid_t uid; 961 962 uid = SCARG(uap, uid); 963 if (kauth_cred_getuid(l->l_cred) != uid) 964 return sys_nosys(l, uap, retval); 965 966 *retval = uid; 967 return 0; 968 } 969 970 int 971 linux_sys_setfsgid(struct lwp *l, const struct linux_sys_setfsgid_args *uap, register_t *retval) 972 { 973 /* { 974 syscallarg(gid_t) gid; 975 } */ 976 gid_t gid; 977 978 gid = SCARG(uap, gid); 979 if (kauth_cred_getgid(l->l_cred) != gid) 980 return sys_nosys(l, uap, retval); 981 982 *retval = gid; 983 return 0; 984 } 985 986 int 987 linux_sys_setresuid(struct lwp *l, const struct linux_sys_setresuid_args *uap, register_t *retval) 988 { 989 /* { 990 syscallarg(uid_t) ruid; 991 syscallarg(uid_t) euid; 992 syscallarg(uid_t) suid; 993 } */ 994 995 /* 996 * Note: These checks are a little different than the NetBSD 997 * setreuid(2) call performs. This precisely follows the 998 * behavior of the Linux kernel. 999 */ 1000 1001 return do_setresuid(l, SCARG(uap, ruid), SCARG(uap, euid), 1002 SCARG(uap, suid), 1003 ID_R_EQ_R | ID_R_EQ_E | ID_R_EQ_S | 1004 ID_E_EQ_R | ID_E_EQ_E | ID_E_EQ_S | 1005 ID_S_EQ_R | ID_S_EQ_E | ID_S_EQ_S ); 1006 } 1007 1008 int 1009 linux_sys_getresuid(struct lwp *l, const struct linux_sys_getresuid_args *uap, register_t *retval) 1010 { 1011 /* { 1012 syscallarg(uid_t *) ruid; 1013 syscallarg(uid_t *) euid; 1014 syscallarg(uid_t *) suid; 1015 } */ 1016 kauth_cred_t pc = l->l_cred; 1017 int error; 1018 uid_t uid; 1019 1020 /* 1021 * Linux copies these values out to userspace like so: 1022 * 1023 * 1. Copy out ruid. 1024 * 2. If that succeeds, copy out euid. 1025 * 3. If both of those succeed, copy out suid. 1026 */ 1027 uid = kauth_cred_getuid(pc); 1028 if ((error = copyout(&uid, SCARG(uap, ruid), sizeof(uid_t))) != 0) 1029 return (error); 1030 1031 uid = kauth_cred_geteuid(pc); 1032 if ((error = copyout(&uid, SCARG(uap, euid), sizeof(uid_t))) != 0) 1033 return (error); 1034 1035 uid = kauth_cred_getsvuid(pc); 1036 1037 return (copyout(&uid, SCARG(uap, suid), sizeof(uid_t))); 1038 } 1039 1040 int 1041 linux_sys_ptrace(struct lwp *l, const struct linux_sys_ptrace_args *uap, register_t *retval) 1042 { 1043 /* { 1044 i386, m68k, powerpc: T=int 1045 alpha, amd64: T=long 1046 syscallarg(T) request; 1047 syscallarg(T) pid; 1048 syscallarg(T) addr; 1049 syscallarg(T) data; 1050 } */ 1051 const int *ptr; 1052 int request; 1053 int error; 1054 1055 ptr = linux_ptrace_request_map; 1056 request = SCARG(uap, request); 1057 while (*ptr != -1) 1058 if (*ptr++ == request) { 1059 struct sys_ptrace_args pta; 1060 1061 SCARG(&pta, req) = *ptr; 1062 SCARG(&pta, pid) = SCARG(uap, pid); 1063 SCARG(&pta, addr) = (void *)SCARG(uap, addr); 1064 SCARG(&pta, data) = SCARG(uap, data); 1065 1066 /* 1067 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1068 * to continue where the process left off previously. 1069 * The same thing is achieved by addr == (void *) 1 1070 * on NetBSD, so rewrite 'addr' appropriately. 1071 */ 1072 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1073 SCARG(&pta, addr) = (void *) 1; 1074 1075 error = sysent[SYS_ptrace].sy_call(l, &pta, retval); 1076 if (error) 1077 return error; 1078 switch (request) { 1079 case LINUX_PTRACE_PEEKTEXT: 1080 case LINUX_PTRACE_PEEKDATA: 1081 error = copyout (retval, 1082 (void *)SCARG(uap, data), 1083 sizeof *retval); 1084 *retval = SCARG(uap, data); 1085 break; 1086 default: 1087 break; 1088 } 1089 return error; 1090 } 1091 else 1092 ptr++; 1093 1094 return LINUX_SYS_PTRACE_ARCH(l, uap, retval); 1095 } 1096 1097 int 1098 linux_sys_reboot(struct lwp *l, const struct linux_sys_reboot_args *uap, register_t *retval) 1099 { 1100 /* { 1101 syscallarg(int) magic1; 1102 syscallarg(int) magic2; 1103 syscallarg(int) cmd; 1104 syscallarg(void *) arg; 1105 } */ 1106 struct sys_reboot_args /* { 1107 syscallarg(int) opt; 1108 syscallarg(char *) bootstr; 1109 } */ sra; 1110 int error; 1111 1112 if ((error = kauth_authorize_system(l->l_cred, 1113 KAUTH_SYSTEM_REBOOT, 0, NULL, NULL, NULL)) != 0) 1114 return(error); 1115 1116 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1117 return(EINVAL); 1118 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1119 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1120 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1121 return(EINVAL); 1122 1123 switch ((unsigned long)SCARG(uap, cmd)) { 1124 case LINUX_REBOOT_CMD_RESTART: 1125 SCARG(&sra, opt) = RB_AUTOBOOT; 1126 break; 1127 case LINUX_REBOOT_CMD_HALT: 1128 SCARG(&sra, opt) = RB_HALT; 1129 break; 1130 case LINUX_REBOOT_CMD_POWER_OFF: 1131 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1132 break; 1133 case LINUX_REBOOT_CMD_RESTART2: 1134 /* Reboot with an argument. */ 1135 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1136 SCARG(&sra, bootstr) = SCARG(uap, arg); 1137 break; 1138 case LINUX_REBOOT_CMD_CAD_ON: 1139 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1140 case LINUX_REBOOT_CMD_CAD_OFF: 1141 return(0); 1142 default: 1143 return(EINVAL); 1144 } 1145 1146 return(sys_reboot(l, &sra, retval)); 1147 } 1148 1149 /* 1150 * Copy of compat_12_sys_swapon(). 1151 */ 1152 int 1153 linux_sys_swapon(struct lwp *l, const struct linux_sys_swapon_args *uap, register_t *retval) 1154 { 1155 /* { 1156 syscallarg(const char *) name; 1157 } */ 1158 struct sys_swapctl_args ua; 1159 1160 SCARG(&ua, cmd) = SWAP_ON; 1161 SCARG(&ua, arg) = (void *)__UNCONST(SCARG(uap, name)); 1162 SCARG(&ua, misc) = 0; /* priority */ 1163 return (sys_swapctl(l, &ua, retval)); 1164 } 1165 1166 /* 1167 * Stop swapping to the file or block device specified by path. 1168 */ 1169 int 1170 linux_sys_swapoff(struct lwp *l, const struct linux_sys_swapoff_args *uap, register_t *retval) 1171 { 1172 /* { 1173 syscallarg(const char *) path; 1174 } */ 1175 struct sys_swapctl_args ua; 1176 1177 SCARG(&ua, cmd) = SWAP_OFF; 1178 SCARG(&ua, arg) = __UNCONST(SCARG(uap, path)); /*XXXUNCONST*/ 1179 return (sys_swapctl(l, &ua, retval)); 1180 } 1181 1182 /* 1183 * Copy of compat_09_sys_setdomainname() 1184 */ 1185 /* ARGSUSED */ 1186 int 1187 linux_sys_setdomainname(struct lwp *l, const struct linux_sys_setdomainname_args *uap, register_t *retval) 1188 { 1189 /* { 1190 syscallarg(char *) domainname; 1191 syscallarg(int) len; 1192 } */ 1193 int name[2]; 1194 1195 name[0] = CTL_KERN; 1196 name[1] = KERN_DOMAINNAME; 1197 return (old_sysctl(&name[0], 2, 0, 0, SCARG(uap, domainname), 1198 SCARG(uap, len), l)); 1199 } 1200 1201 /* 1202 * sysinfo() 1203 */ 1204 /* ARGSUSED */ 1205 int 1206 linux_sys_sysinfo(struct lwp *l, const struct linux_sys_sysinfo_args *uap, register_t *retval) 1207 { 1208 /* { 1209 syscallarg(struct linux_sysinfo *) arg; 1210 } */ 1211 struct linux_sysinfo si; 1212 struct loadavg *la; 1213 1214 si.uptime = time_uptime; 1215 la = &averunnable; 1216 si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1217 si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1218 si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1219 si.totalram = ctob((u_long)physmem); 1220 si.freeram = (u_long)uvmexp.free * uvmexp.pagesize; 1221 si.sharedram = 0; /* XXX */ 1222 si.bufferram = (u_long)uvmexp.filepages * uvmexp.pagesize; 1223 si.totalswap = (u_long)uvmexp.swpages * uvmexp.pagesize; 1224 si.freeswap = 1225 (u_long)(uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize; 1226 si.procs = nprocs; 1227 1228 /* The following are only present in newer Linux kernels. */ 1229 si.totalbig = 0; 1230 si.freebig = 0; 1231 si.mem_unit = 1; 1232 1233 return (copyout(&si, SCARG(uap, arg), sizeof si)); 1234 } 1235 1236 int 1237 linux_sys_getrlimit(struct lwp *l, const struct linux_sys_getrlimit_args *uap, register_t *retval) 1238 { 1239 /* { 1240 syscallarg(int) which; 1241 # ifdef LINUX_LARGEFILE64 1242 syscallarg(struct rlimit *) rlp; 1243 # else 1244 syscallarg(struct orlimit *) rlp; 1245 # endif 1246 } */ 1247 # ifdef LINUX_LARGEFILE64 1248 struct rlimit orl; 1249 # else 1250 struct orlimit orl; 1251 # endif 1252 int which; 1253 1254 which = linux_to_bsd_limit(SCARG(uap, which)); 1255 if (which < 0) 1256 return -which; 1257 1258 bsd_to_linux_rlimit(&orl, &l->l_proc->p_rlimit[which]); 1259 1260 return copyout(&orl, SCARG(uap, rlp), sizeof(orl)); 1261 } 1262 1263 int 1264 linux_sys_setrlimit(struct lwp *l, const struct linux_sys_setrlimit_args *uap, register_t *retval) 1265 { 1266 /* { 1267 syscallarg(int) which; 1268 # ifdef LINUX_LARGEFILE64 1269 syscallarg(struct rlimit *) rlp; 1270 # else 1271 syscallarg(struct orlimit *) rlp; 1272 # endif 1273 } */ 1274 struct rlimit rl; 1275 # ifdef LINUX_LARGEFILE64 1276 struct rlimit orl; 1277 # else 1278 struct orlimit orl; 1279 # endif 1280 int error; 1281 int which; 1282 1283 if ((error = copyin(SCARG(uap, rlp), &orl, sizeof(orl))) != 0) 1284 return error; 1285 1286 which = linux_to_bsd_limit(SCARG(uap, which)); 1287 if (which < 0) 1288 return -which; 1289 1290 linux_to_bsd_rlimit(&rl, &orl); 1291 return dosetrlimit(l, l->l_proc, which, &rl); 1292 } 1293 1294 # if !defined(__mips__) && !defined(__amd64__) 1295 /* XXX: this doesn't look 100% common, at least mips doesn't have it */ 1296 int 1297 linux_sys_ugetrlimit(struct lwp *l, const struct linux_sys_ugetrlimit_args *uap, register_t *retval) 1298 { 1299 return linux_sys_getrlimit(l, (const void *)uap, retval); 1300 } 1301 # endif 1302 1303 /* 1304 * This gets called for unsupported syscalls. The difference to sys_nosys() 1305 * is that process does not get SIGSYS, the call just returns with ENOSYS. 1306 * This is the way Linux does it and glibc depends on this behaviour. 1307 */ 1308 int 1309 linux_sys_nosys(struct lwp *l, const void *v, register_t *retval) 1310 { 1311 return (ENOSYS); 1312 } 1313 1314 int 1315 linux_sys_getpriority(struct lwp *l, const struct linux_sys_getpriority_args *uap, register_t *retval) 1316 { 1317 /* { 1318 syscallarg(int) which; 1319 syscallarg(int) who; 1320 } */ 1321 struct sys_getpriority_args bsa; 1322 int error; 1323 1324 SCARG(&bsa, which) = SCARG(uap, which); 1325 SCARG(&bsa, who) = SCARG(uap, who); 1326 1327 if ((error = sys_getpriority(l, &bsa, retval))) 1328 return error; 1329 1330 *retval = NZERO - *retval; 1331 1332 return 0; 1333 } 1334 1335 #endif /* !COMPAT_LINUX32 */ 1336