1 /* $NetBSD: linux_misc.c,v 1.218 2010/11/02 18:18:07 chs 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 1.218 2010/11/02 18:18:07 chs 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/common/linux_fcntl.h> 111 #include <compat/linux/common/linux_mmap.h> 112 #include <compat/linux/common/linux_dirent.h> 113 #include <compat/linux/common/linux_util.h> 114 #include <compat/linux/common/linux_misc.h> 115 #ifndef COMPAT_LINUX32 116 #include <compat/linux/common/linux_statfs.h> 117 #include <compat/linux/common/linux_limit.h> 118 #endif 119 #include <compat/linux/common/linux_ptrace.h> 120 #include <compat/linux/common/linux_reboot.h> 121 #include <compat/linux/common/linux_emuldata.h> 122 123 #include <compat/linux/linux_syscallargs.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_NULL, LINUX_DEFAULT_SUPER_MAGIC }, 151 { MOUNT_OVERLAY, LINUX_DEFAULT_SUPER_MAGIC }, 152 { MOUNT_UMAP, LINUX_DEFAULT_SUPER_MAGIC }, 153 { MOUNT_KERNFS, LINUX_DEFAULT_SUPER_MAGIC }, 154 { MOUNT_PROCFS, LINUX_PROC_SUPER_MAGIC }, 155 { MOUNT_AFS, LINUX_DEFAULT_SUPER_MAGIC }, 156 { MOUNT_CD9660, LINUX_ISOFS_SUPER_MAGIC }, 157 { MOUNT_UNION, LINUX_DEFAULT_SUPER_MAGIC }, 158 { MOUNT_ADOSFS, LINUX_ADFS_SUPER_MAGIC }, 159 { MOUNT_EXT2FS, LINUX_EXT2_SUPER_MAGIC }, 160 { MOUNT_CFS, LINUX_DEFAULT_SUPER_MAGIC }, 161 { MOUNT_CODA, LINUX_CODA_SUPER_MAGIC }, 162 { MOUNT_FILECORE, LINUX_DEFAULT_SUPER_MAGIC }, 163 { MOUNT_NTFS, LINUX_DEFAULT_SUPER_MAGIC }, 164 { MOUNT_SMBFS, LINUX_SMB_SUPER_MAGIC }, 165 { MOUNT_PTYFS, LINUX_DEVPTS_SUPER_MAGIC }, 166 { MOUNT_TMPFS, LINUX_TMPFS_SUPER_MAGIC } 167 }; 168 const int linux_fstypes_cnt = sizeof(linux_fstypes) / sizeof(linux_fstypes[0]); 169 170 # ifdef DEBUG_LINUX 171 #define DPRINTF(a) uprintf a 172 # else 173 #define DPRINTF(a) 174 # endif 175 176 /* Local linux_misc.c functions: */ 177 static void linux_to_bsd_mmap_args(struct sys_mmap_args *, 178 const struct linux_sys_mmap_args *); 179 static int linux_mmap(struct lwp *, const struct linux_sys_mmap_args *, 180 register_t *, off_t); 181 182 183 /* 184 * The information on a terminated (or stopped) process needs 185 * to be converted in order for Linux binaries to get a valid signal 186 * number out of it. 187 */ 188 int 189 bsd_to_linux_wstat(int st) 190 { 191 192 int sig; 193 194 if (WIFSIGNALED(st)) { 195 sig = WTERMSIG(st); 196 if (sig >= 0 && sig < NSIG) 197 st= (st & ~0177) | native_to_linux_signo[sig]; 198 } else if (WIFSTOPPED(st)) { 199 sig = WSTOPSIG(st); 200 if (sig >= 0 && sig < NSIG) 201 st = (st & ~0xff00) | 202 (native_to_linux_signo[sig] << 8); 203 } 204 return st; 205 } 206 207 /* 208 * wait4(2). Passed on to the NetBSD call, surrounded by code to 209 * reserve some space for a NetBSD-style wait status, and converting 210 * it to what Linux wants. 211 */ 212 int 213 linux_sys_wait4(struct lwp *l, const struct linux_sys_wait4_args *uap, register_t *retval) 214 { 215 /* { 216 syscallarg(int) pid; 217 syscallarg(int *) status; 218 syscallarg(int) options; 219 syscallarg(struct rusage50 *) rusage; 220 } */ 221 int error, status, options, linux_options, pid = SCARG(uap, pid); 222 struct rusage50 ru50; 223 struct rusage ru; 224 proc_t *p; 225 226 linux_options = SCARG(uap, options); 227 options = WOPTSCHECKED; 228 if (linux_options & ~(LINUX_WAIT4_KNOWNFLAGS)) 229 return (EINVAL); 230 231 if (linux_options & LINUX_WAIT4_WNOHANG) 232 options |= WNOHANG; 233 if (linux_options & LINUX_WAIT4_WUNTRACED) 234 options |= WUNTRACED; 235 if (linux_options & LINUX_WAIT4_WALL) 236 options |= WALLSIG; 237 if (linux_options & LINUX_WAIT4_WCLONE) 238 options |= WALTSIG; 239 # ifdef DIAGNOSTIC 240 if (linux_options & LINUX_WAIT4_WNOTHREAD) 241 printf("WARNING: %s: linux process %d.%d called " 242 "waitpid with __WNOTHREAD set!", 243 __FILE__, l->l_proc->p_pid, l->l_lid); 244 245 # endif 246 247 error = do_sys_wait(&pid, &status, options, 248 SCARG(uap, rusage) != NULL ? &ru : NULL); 249 250 retval[0] = pid; 251 if (pid == 0) 252 return error; 253 254 p = curproc; 255 mutex_enter(p->p_lock); 256 sigdelset(&p->p_sigpend.sp_set, SIGCHLD); /* XXXAD ksiginfo leak */ 257 mutex_exit(p->p_lock); 258 259 if (SCARG(uap, rusage) != NULL) { 260 rusage_to_rusage50(&ru, &ru50); 261 error = copyout(&ru, SCARG(uap, rusage), sizeof(ru)); 262 } 263 264 if (error == 0 && SCARG(uap, status) != NULL) { 265 status = bsd_to_linux_wstat(status); 266 error = copyout(&status, SCARG(uap, status), sizeof status); 267 } 268 269 return error; 270 } 271 272 /* 273 * Linux brk(2). Like native, but always return the new break value. 274 */ 275 int 276 linux_sys_brk(struct lwp *l, const struct linux_sys_brk_args *uap, register_t *retval) 277 { 278 /* { 279 syscallarg(char *) nsize; 280 } */ 281 struct proc *p = l->l_proc; 282 struct vmspace *vm = p->p_vmspace; 283 struct sys_obreak_args oba; 284 285 SCARG(&oba, nsize) = SCARG(uap, nsize); 286 287 (void) sys_obreak(l, &oba, retval); 288 retval[0] = (register_t)((char *)vm->vm_daddr + ptoa(vm->vm_dsize)); 289 return 0; 290 } 291 292 /* 293 * Implement the fs stat functions. Straightforward. 294 */ 295 int 296 linux_sys_statfs(struct lwp *l, const struct linux_sys_statfs_args *uap, register_t *retval) 297 { 298 /* { 299 syscallarg(const char *) path; 300 syscallarg(struct linux_statfs *) sp; 301 } */ 302 struct statvfs *sb; 303 struct linux_statfs ltmp; 304 int error; 305 306 sb = STATVFSBUF_GET(); 307 error = do_sys_pstatvfs(l, SCARG(uap, path), ST_WAIT, sb); 308 if (error == 0) { 309 bsd_to_linux_statfs(sb, <mp); 310 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 311 } 312 STATVFSBUF_PUT(sb); 313 314 return error; 315 } 316 317 int 318 linux_sys_fstatfs(struct lwp *l, const struct linux_sys_fstatfs_args *uap, register_t *retval) 319 { 320 /* { 321 syscallarg(int) fd; 322 syscallarg(struct linux_statfs *) sp; 323 } */ 324 struct statvfs *sb; 325 struct linux_statfs ltmp; 326 int error; 327 328 sb = STATVFSBUF_GET(); 329 error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb); 330 if (error == 0) { 331 bsd_to_linux_statfs(sb, <mp); 332 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 333 } 334 STATVFSBUF_PUT(sb); 335 336 return error; 337 } 338 339 /* 340 * uname(). Just copy the info from the various strings stored in the 341 * kernel, and put it in the Linux utsname structure. That structure 342 * is almost the same as the NetBSD one, only it has fields 65 characters 343 * long, and an extra domainname field. 344 */ 345 int 346 linux_sys_uname(struct lwp *l, const struct linux_sys_uname_args *uap, register_t *retval) 347 { 348 /* { 349 syscallarg(struct linux_utsname *) up; 350 } */ 351 struct linux_utsname luts; 352 353 strlcpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 354 strlcpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 355 strlcpy(luts.l_release, linux_release, sizeof(luts.l_release)); 356 strlcpy(luts.l_version, linux_version, sizeof(luts.l_version)); 357 strlcpy(luts.l_machine, LINUX_UNAME_ARCH, sizeof(luts.l_machine)); 358 strlcpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 359 360 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 361 } 362 363 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 364 /* Used indirectly on: arm, i386, m68k */ 365 366 /* 367 * New type Linux mmap call. 368 * Only called directly on machines with >= 6 free regs. 369 */ 370 int 371 linux_sys_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval) 372 { 373 /* { 374 syscallarg(unsigned long) addr; 375 syscallarg(size_t) len; 376 syscallarg(int) prot; 377 syscallarg(int) flags; 378 syscallarg(int) fd; 379 syscallarg(linux_off_t) offset; 380 } */ 381 382 if (SCARG(uap, offset) & PAGE_MASK) 383 return EINVAL; 384 385 return linux_mmap(l, uap, retval, SCARG(uap, offset)); 386 } 387 388 /* 389 * Guts of most architectures' mmap64() implementations. This shares 390 * its list of arguments with linux_sys_mmap(). 391 * 392 * The difference in linux_sys_mmap2() is that "offset" is actually 393 * (offset / pagesize), not an absolute byte count. This translation 394 * to pagesize offsets is done inside glibc between the mmap64() call 395 * point, and the actual syscall. 396 */ 397 int 398 linux_sys_mmap2(struct lwp *l, const struct linux_sys_mmap2_args *uap, register_t *retval) 399 { 400 /* { 401 syscallarg(unsigned long) addr; 402 syscallarg(size_t) len; 403 syscallarg(int) prot; 404 syscallarg(int) flags; 405 syscallarg(int) fd; 406 syscallarg(linux_off_t) offset; 407 } */ 408 409 return linux_mmap(l, uap, retval, 410 ((off_t)SCARG(uap, offset)) << PAGE_SHIFT); 411 } 412 413 /* 414 * Massage arguments and call system mmap(2). 415 */ 416 static int 417 linux_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval, off_t offset) 418 { 419 struct sys_mmap_args cma; 420 int error; 421 size_t mmoff=0; 422 423 linux_to_bsd_mmap_args(&cma, uap); 424 SCARG(&cma, pos) = offset; 425 426 if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN) { 427 /* 428 * Request for stack-like memory segment. On linux, this 429 * works by mmap()ping (small) segment, which is automatically 430 * extended when page fault happens below the currently 431 * allocated area. We emulate this by allocating (typically 432 * bigger) segment sized at current stack size limit, and 433 * offsetting the requested and returned address accordingly. 434 * Since physical pages are only allocated on-demand, this 435 * is effectively identical. 436 */ 437 rlim_t ssl = l->l_proc->p_rlimit[RLIMIT_STACK].rlim_cur; 438 439 if (SCARG(&cma, len) < ssl) { 440 /* Compute the address offset */ 441 mmoff = round_page(ssl) - SCARG(uap, len); 442 443 if (SCARG(&cma, addr)) 444 SCARG(&cma, addr) = (char *)SCARG(&cma, addr) - mmoff; 445 446 SCARG(&cma, len) = (size_t) ssl; 447 } 448 } 449 450 error = sys_mmap(l, &cma, retval); 451 if (error) 452 return (error); 453 454 /* Shift the returned address for stack-like segment if necessary */ 455 retval[0] += mmoff; 456 457 return (0); 458 } 459 460 static void 461 linux_to_bsd_mmap_args(struct sys_mmap_args *cma, const struct linux_sys_mmap_args *uap) 462 { 463 int flags = MAP_TRYFIXED, fl = SCARG(uap, flags); 464 465 flags |= cvtto_bsd_mask(fl, LINUX_MAP_SHARED, MAP_SHARED); 466 flags |= cvtto_bsd_mask(fl, LINUX_MAP_PRIVATE, MAP_PRIVATE); 467 flags |= cvtto_bsd_mask(fl, LINUX_MAP_FIXED, MAP_FIXED); 468 flags |= cvtto_bsd_mask(fl, LINUX_MAP_ANON, MAP_ANON); 469 /* XXX XAX ERH: Any other flags here? There are more defined... */ 470 471 SCARG(cma, addr) = (void *)SCARG(uap, addr); 472 SCARG(cma, len) = SCARG(uap, len); 473 SCARG(cma, prot) = SCARG(uap, prot); 474 if (SCARG(cma, prot) & VM_PROT_WRITE) /* XXX */ 475 SCARG(cma, prot) |= VM_PROT_READ; 476 SCARG(cma, flags) = flags; 477 SCARG(cma, fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 478 SCARG(cma, PAD) = 0; 479 } 480 481 #define LINUX_MREMAP_MAYMOVE 1 482 #define LINUX_MREMAP_FIXED 2 483 484 int 485 linux_sys_mremap(struct lwp *l, const struct linux_sys_mremap_args *uap, register_t *retval) 486 { 487 /* { 488 syscallarg(void *) old_address; 489 syscallarg(size_t) old_size; 490 syscallarg(size_t) new_size; 491 syscallarg(u_long) flags; 492 } */ 493 494 struct proc *p; 495 struct vm_map *map; 496 vaddr_t oldva; 497 vaddr_t newva; 498 size_t oldsize; 499 size_t newsize; 500 int flags; 501 int uvmflags; 502 int error; 503 504 flags = SCARG(uap, flags); 505 oldva = (vaddr_t)SCARG(uap, old_address); 506 oldsize = round_page(SCARG(uap, old_size)); 507 newsize = round_page(SCARG(uap, new_size)); 508 if ((flags & ~(LINUX_MREMAP_FIXED|LINUX_MREMAP_MAYMOVE)) != 0) { 509 error = EINVAL; 510 goto done; 511 } 512 if ((flags & LINUX_MREMAP_FIXED) != 0) { 513 if ((flags & LINUX_MREMAP_MAYMOVE) == 0) { 514 error = EINVAL; 515 goto done; 516 } 517 #if 0 /* notyet */ 518 newva = SCARG(uap, new_address); 519 uvmflags = MAP_FIXED; 520 #else /* notyet */ 521 error = EOPNOTSUPP; 522 goto done; 523 #endif /* notyet */ 524 } else if ((flags & LINUX_MREMAP_MAYMOVE) != 0) { 525 uvmflags = 0; 526 } else { 527 newva = oldva; 528 uvmflags = MAP_FIXED; 529 } 530 p = l->l_proc; 531 map = &p->p_vmspace->vm_map; 532 error = uvm_mremap(map, oldva, oldsize, map, &newva, newsize, p, 533 uvmflags); 534 535 done: 536 *retval = (error != 0) ? 0 : (register_t)newva; 537 return error; 538 } 539 540 int 541 linux_sys_mprotect(struct lwp *l, const struct linux_sys_mprotect_args *uap, register_t *retval) 542 { 543 /* { 544 syscallarg(const void *) start; 545 syscallarg(unsigned long) len; 546 syscallarg(int) prot; 547 } */ 548 struct vm_map_entry *entry; 549 struct vm_map *map; 550 struct proc *p; 551 vaddr_t end, start, len, stacklim; 552 int prot, grows; 553 554 start = (vaddr_t)SCARG(uap, start); 555 len = round_page(SCARG(uap, len)); 556 prot = SCARG(uap, prot); 557 grows = prot & (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP); 558 prot &= ~grows; 559 end = start + len; 560 561 if (start & PAGE_MASK) 562 return EINVAL; 563 if (end < start) 564 return EINVAL; 565 if (end == start) 566 return 0; 567 568 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) 569 return EINVAL; 570 if (grows == (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP)) 571 return EINVAL; 572 573 p = l->l_proc; 574 map = &p->p_vmspace->vm_map; 575 vm_map_lock(map); 576 # ifdef notdef 577 VM_MAP_RANGE_CHECK(map, start, end); 578 # endif 579 if (!uvm_map_lookup_entry(map, start, &entry) || entry->start > start) { 580 vm_map_unlock(map); 581 return ENOMEM; 582 } 583 584 /* 585 * Approximate the behaviour of PROT_GROWS{DOWN,UP}. 586 */ 587 588 stacklim = (vaddr_t)p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur; 589 if (grows & LINUX_PROT_GROWSDOWN) { 590 if (USRSTACK - stacklim <= start && start < USRSTACK) { 591 start = USRSTACK - stacklim; 592 } else { 593 start = entry->start; 594 } 595 } else if (grows & LINUX_PROT_GROWSUP) { 596 if (USRSTACK <= end && end < USRSTACK + stacklim) { 597 end = USRSTACK + stacklim; 598 } else { 599 end = entry->end; 600 } 601 } 602 vm_map_unlock(map); 603 return uvm_map_protect(map, start, end, prot, FALSE); 604 } 605 606 /* 607 * This code is partly stolen from src/lib/libc/compat-43/times.c 608 */ 609 610 #define CONVTCK(r) (r.tv_sec * hz + r.tv_usec / (1000000 / hz)) 611 612 int 613 linux_sys_times(struct lwp *l, const struct linux_sys_times_args *uap, register_t *retval) 614 { 615 /* { 616 syscallarg(struct times *) tms; 617 } */ 618 struct proc *p = l->l_proc; 619 struct timeval t; 620 int error; 621 622 if (SCARG(uap, tms)) { 623 struct linux_tms ltms; 624 struct rusage ru; 625 626 mutex_enter(p->p_lock); 627 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL, NULL); 628 ltms.ltms_utime = CONVTCK(ru.ru_utime); 629 ltms.ltms_stime = CONVTCK(ru.ru_stime); 630 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 631 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 632 mutex_exit(p->p_lock); 633 634 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 635 return error; 636 } 637 638 getmicrouptime(&t); 639 640 retval[0] = ((linux_clock_t)(CONVTCK(t))); 641 return 0; 642 } 643 644 #undef CONVTCK 645 646 /* 647 * Linux 'readdir' call. This code is mostly taken from the 648 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 649 * an attempt has been made to keep it a little cleaner (failing 650 * miserably, because of the cruft needed if count 1 is passed). 651 * 652 * The d_off field should contain the offset of the next valid entry, 653 * but in Linux it has the offset of the entry itself. We emulate 654 * that bug here. 655 * 656 * Read in BSD-style entries, convert them, and copy them out. 657 * 658 * Note that this doesn't handle union-mounted filesystems. 659 */ 660 int 661 linux_sys_getdents(struct lwp *l, const struct linux_sys_getdents_args *uap, register_t *retval) 662 { 663 /* { 664 syscallarg(int) fd; 665 syscallarg(struct linux_dirent *) dent; 666 syscallarg(unsigned int) count; 667 } */ 668 struct dirent *bdp; 669 struct vnode *vp; 670 char *inp, *tbuf; /* BSD-format */ 671 int len, reclen; /* BSD-format */ 672 char *outp; /* Linux-format */ 673 int resid, linux_reclen = 0; /* Linux-format */ 674 struct file *fp; 675 struct uio auio; 676 struct iovec aiov; 677 struct linux_dirent idb; 678 off_t off; /* true file offset */ 679 int buflen, error, eofflag, nbytes, oldcall; 680 struct vattr va; 681 off_t *cookiebuf = NULL, *cookie; 682 int ncookies; 683 684 /* fd_getvnode() will use the descriptor for us */ 685 if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0) 686 return (error); 687 688 if ((fp->f_flag & FREAD) == 0) { 689 error = EBADF; 690 goto out1; 691 } 692 693 vp = (struct vnode *)fp->f_data; 694 if (vp->v_type != VDIR) { 695 error = ENOTDIR; 696 goto out1; 697 } 698 699 if ((error = VOP_GETATTR(vp, &va, l->l_cred))) 700 goto out1; 701 702 nbytes = SCARG(uap, count); 703 if (nbytes == 1) { /* emulating old, broken behaviour */ 704 nbytes = sizeof (idb); 705 buflen = max(va.va_blocksize, nbytes); 706 oldcall = 1; 707 } else { 708 buflen = min(MAXBSIZE, nbytes); 709 if (buflen < va.va_blocksize) 710 buflen = va.va_blocksize; 711 oldcall = 0; 712 } 713 tbuf = malloc(buflen, M_TEMP, M_WAITOK); 714 715 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 716 off = fp->f_offset; 717 again: 718 aiov.iov_base = tbuf; 719 aiov.iov_len = buflen; 720 auio.uio_iov = &aiov; 721 auio.uio_iovcnt = 1; 722 auio.uio_rw = UIO_READ; 723 auio.uio_resid = buflen; 724 auio.uio_offset = off; 725 UIO_SETUP_SYSSPACE(&auio); 726 /* 727 * First we read into the malloc'ed buffer, then 728 * we massage it into user space, one record at a time. 729 */ 730 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 731 &ncookies); 732 if (error) 733 goto out; 734 735 inp = tbuf; 736 outp = (void *)SCARG(uap, dent); 737 resid = nbytes; 738 if ((len = buflen - auio.uio_resid) == 0) 739 goto eof; 740 741 for (cookie = cookiebuf; len > 0; len -= reclen) { 742 bdp = (struct dirent *)inp; 743 reclen = bdp->d_reclen; 744 if (reclen & 3) 745 panic("linux_readdir"); 746 if (bdp->d_fileno == 0) { 747 inp += reclen; /* it is a hole; squish it out */ 748 if (cookie) 749 off = *cookie++; 750 else 751 off += reclen; 752 continue; 753 } 754 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 755 if (reclen > len || resid < linux_reclen) { 756 /* entry too big for buffer, so just stop */ 757 outp++; 758 break; 759 } 760 /* 761 * Massage in place to make a Linux-shaped dirent (otherwise 762 * we have to worry about touching user memory outside of 763 * the copyout() call). 764 */ 765 idb.d_ino = bdp->d_fileno; 766 /* 767 * The old readdir() call misuses the offset and reclen fields. 768 */ 769 if (oldcall) { 770 idb.d_off = (linux_off_t)linux_reclen; 771 idb.d_reclen = (u_short)bdp->d_namlen; 772 } else { 773 if (sizeof (idb.d_off) <= 4 && (off >> 32) != 0) { 774 compat_offseterr(vp, "linux_getdents"); 775 error = EINVAL; 776 goto out; 777 } 778 idb.d_off = (linux_off_t)off; 779 idb.d_reclen = (u_short)linux_reclen; 780 } 781 strcpy(idb.d_name, bdp->d_name); 782 idb.d_name[strlen(idb.d_name) + 1] = bdp->d_type; 783 if ((error = copyout((void *)&idb, outp, linux_reclen))) 784 goto out; 785 /* advance past this real entry */ 786 inp += reclen; 787 if (cookie) 788 off = *cookie++; /* each entry points to itself */ 789 else 790 off += reclen; 791 /* advance output past Linux-shaped entry */ 792 outp += linux_reclen; 793 resid -= linux_reclen; 794 if (oldcall) 795 break; 796 } 797 798 /* if we squished out the whole block, try again */ 799 if (outp == (void *)SCARG(uap, dent)) { 800 if (cookiebuf) 801 free(cookiebuf, M_TEMP); 802 cookiebuf = NULL; 803 goto again; 804 } 805 fp->f_offset = off; /* update the vnode offset */ 806 807 if (oldcall) 808 nbytes = resid + linux_reclen; 809 810 eof: 811 *retval = nbytes - resid; 812 out: 813 VOP_UNLOCK(vp); 814 if (cookiebuf) 815 free(cookiebuf, M_TEMP); 816 free(tbuf, M_TEMP); 817 out1: 818 fd_putfile(SCARG(uap, fd)); 819 return error; 820 } 821 822 /* 823 * Even when just using registers to pass arguments to syscalls you can 824 * have 5 of them on the i386. So this newer version of select() does 825 * this. 826 */ 827 int 828 linux_sys_select(struct lwp *l, const struct linux_sys_select_args *uap, register_t *retval) 829 { 830 /* { 831 syscallarg(int) nfds; 832 syscallarg(fd_set *) readfds; 833 syscallarg(fd_set *) writefds; 834 syscallarg(fd_set *) exceptfds; 835 syscallarg(struct timeval50 *) timeout; 836 } */ 837 838 return linux_select1(l, retval, SCARG(uap, nfds), SCARG(uap, readfds), 839 SCARG(uap, writefds), SCARG(uap, exceptfds), 840 (struct linux_timeval *)SCARG(uap, timeout)); 841 } 842 843 /* 844 * Common code for the old and new versions of select(). A couple of 845 * things are important: 846 * 1) return the amount of time left in the 'timeout' parameter 847 * 2) select never returns ERESTART on Linux, always return EINTR 848 */ 849 int 850 linux_select1(struct lwp *l, register_t *retval, int nfds, fd_set *readfds, 851 fd_set *writefds, fd_set *exceptfds, struct linux_timeval *timeout) 852 { 853 struct timespec ts0, ts1, uts, *ts = NULL; 854 struct linux_timeval ltv; 855 int error; 856 857 /* 858 * Store current time for computation of the amount of 859 * time left. 860 */ 861 if (timeout) { 862 if ((error = copyin(timeout, <v, sizeof(ltv)))) 863 return error; 864 uts.tv_sec = ltv.tv_sec; 865 uts.tv_nsec = ltv.tv_usec * 1000; 866 if (itimespecfix(&uts)) { 867 /* 868 * The timeval was invalid. Convert it to something 869 * valid that will act as it does under Linux. 870 */ 871 uts.tv_sec += uts.tv_nsec / 1000000000; 872 uts.tv_nsec %= 1000000000; 873 if (uts.tv_nsec < 0) { 874 uts.tv_sec -= 1; 875 uts.tv_nsec += 1000000000; 876 } 877 if (uts.tv_sec < 0) 878 timespecclear(&uts); 879 } 880 ts = &uts; 881 nanotime(&ts0); 882 } 883 884 error = selcommon(retval, nfds, readfds, writefds, exceptfds, ts, NULL); 885 886 if (error) { 887 /* 888 * See fs/select.c in the Linux kernel. Without this, 889 * Maelstrom doesn't work. 890 */ 891 if (error == ERESTART) 892 error = EINTR; 893 return error; 894 } 895 896 if (timeout) { 897 if (*retval) { 898 /* 899 * Compute how much time was left of the timeout, 900 * by subtracting the current time and the time 901 * before we started the call, and subtracting 902 * that result from the user-supplied value. 903 */ 904 nanotime(&ts1); 905 timespecsub(&ts1, &ts0, &ts1); 906 timespecsub(&uts, &ts1, &uts); 907 if (uts.tv_sec < 0) 908 timespecclear(&uts); 909 } else 910 timespecclear(&uts); 911 ltv.tv_sec = uts.tv_sec; 912 ltv.tv_usec = uts.tv_nsec / 1000; 913 if ((error = copyout(<v, timeout, sizeof(ltv)))) 914 return error; 915 } 916 917 return 0; 918 } 919 920 /* 921 * Set the 'personality' (emulation mode) for the current process. Only 922 * accept the Linux personality here (0). This call is needed because 923 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 924 * ELF binaries run in Linux mode, not SVR4 mode. 925 */ 926 int 927 linux_sys_personality(struct lwp *l, const struct linux_sys_personality_args *uap, register_t *retval) 928 { 929 /* { 930 syscallarg(unsigned long) per; 931 } */ 932 struct linux_emuldata *led; 933 int per; 934 935 per = SCARG(uap, per); 936 led = l->l_emuldata; 937 if (per == LINUX_PER_QUERY) { 938 retval[0] = led->led_personality; 939 return 0; 940 } 941 942 switch (per & LINUX_PER_MASK) { 943 case LINUX_PER_LINUX: 944 case LINUX_PER_LINUX32: 945 led->led_personality = per; 946 break; 947 948 default: 949 return EINVAL; 950 } 951 952 retval[0] = per; 953 return 0; 954 } 955 956 /* 957 * We have nonexistent fsuid equal to uid. 958 * If modification is requested, refuse. 959 */ 960 int 961 linux_sys_setfsuid(struct lwp *l, const struct linux_sys_setfsuid_args *uap, register_t *retval) 962 { 963 /* { 964 syscallarg(uid_t) uid; 965 } */ 966 uid_t uid; 967 968 uid = SCARG(uap, uid); 969 if (kauth_cred_getuid(l->l_cred) != uid) 970 return sys_nosys(l, uap, retval); 971 972 *retval = uid; 973 return 0; 974 } 975 976 int 977 linux_sys_setfsgid(struct lwp *l, const struct linux_sys_setfsgid_args *uap, register_t *retval) 978 { 979 /* { 980 syscallarg(gid_t) gid; 981 } */ 982 gid_t gid; 983 984 gid = SCARG(uap, gid); 985 if (kauth_cred_getgid(l->l_cred) != gid) 986 return sys_nosys(l, uap, retval); 987 988 *retval = gid; 989 return 0; 990 } 991 992 int 993 linux_sys_setresuid(struct lwp *l, const struct linux_sys_setresuid_args *uap, register_t *retval) 994 { 995 /* { 996 syscallarg(uid_t) ruid; 997 syscallarg(uid_t) euid; 998 syscallarg(uid_t) suid; 999 } */ 1000 1001 /* 1002 * Note: These checks are a little different than the NetBSD 1003 * setreuid(2) call performs. This precisely follows the 1004 * behavior of the Linux kernel. 1005 */ 1006 1007 return do_setresuid(l, SCARG(uap, ruid), SCARG(uap, euid), 1008 SCARG(uap, suid), 1009 ID_R_EQ_R | ID_R_EQ_E | ID_R_EQ_S | 1010 ID_E_EQ_R | ID_E_EQ_E | ID_E_EQ_S | 1011 ID_S_EQ_R | ID_S_EQ_E | ID_S_EQ_S ); 1012 } 1013 1014 int 1015 linux_sys_getresuid(struct lwp *l, const struct linux_sys_getresuid_args *uap, register_t *retval) 1016 { 1017 /* { 1018 syscallarg(uid_t *) ruid; 1019 syscallarg(uid_t *) euid; 1020 syscallarg(uid_t *) suid; 1021 } */ 1022 kauth_cred_t pc = l->l_cred; 1023 int error; 1024 uid_t uid; 1025 1026 /* 1027 * Linux copies these values out to userspace like so: 1028 * 1029 * 1. Copy out ruid. 1030 * 2. If that succeeds, copy out euid. 1031 * 3. If both of those succeed, copy out suid. 1032 */ 1033 uid = kauth_cred_getuid(pc); 1034 if ((error = copyout(&uid, SCARG(uap, ruid), sizeof(uid_t))) != 0) 1035 return (error); 1036 1037 uid = kauth_cred_geteuid(pc); 1038 if ((error = copyout(&uid, SCARG(uap, euid), sizeof(uid_t))) != 0) 1039 return (error); 1040 1041 uid = kauth_cred_getsvuid(pc); 1042 1043 return (copyout(&uid, SCARG(uap, suid), sizeof(uid_t))); 1044 } 1045 1046 int 1047 linux_sys_ptrace(struct lwp *l, const struct linux_sys_ptrace_args *uap, register_t *retval) 1048 { 1049 /* { 1050 i386, m68k, powerpc: T=int 1051 alpha, amd64: T=long 1052 syscallarg(T) request; 1053 syscallarg(T) pid; 1054 syscallarg(T) addr; 1055 syscallarg(T) data; 1056 } */ 1057 const int *ptr; 1058 int request; 1059 int error; 1060 1061 ptr = linux_ptrace_request_map; 1062 request = SCARG(uap, request); 1063 while (*ptr != -1) 1064 if (*ptr++ == request) { 1065 struct sys_ptrace_args pta; 1066 1067 SCARG(&pta, req) = *ptr; 1068 SCARG(&pta, pid) = SCARG(uap, pid); 1069 SCARG(&pta, addr) = (void *)SCARG(uap, addr); 1070 SCARG(&pta, data) = SCARG(uap, data); 1071 1072 /* 1073 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1074 * to continue where the process left off previously. 1075 * The same thing is achieved by addr == (void *) 1 1076 * on NetBSD, so rewrite 'addr' appropriately. 1077 */ 1078 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1079 SCARG(&pta, addr) = (void *) 1; 1080 1081 error = sysent[SYS_ptrace].sy_call(l, &pta, retval); 1082 if (error) 1083 return error; 1084 switch (request) { 1085 case LINUX_PTRACE_PEEKTEXT: 1086 case LINUX_PTRACE_PEEKDATA: 1087 error = copyout (retval, 1088 (void *)SCARG(uap, data), 1089 sizeof *retval); 1090 *retval = SCARG(uap, data); 1091 break; 1092 default: 1093 break; 1094 } 1095 return error; 1096 } 1097 else 1098 ptr++; 1099 1100 return LINUX_SYS_PTRACE_ARCH(l, uap, retval); 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 ((unsigned long)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 #endif /* !COMPAT_LINUX32 */ 1341