1 /* $NetBSD: linux_misc.c,v 1.213 2009/12/05 20:11:17 pooka 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 1.213 2009/12/05 20:11:17 pooka 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_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). The check if the new address is >= the old one is 274 * done in the kernel in Linux. NetBSD does it in the library. 275 */ 276 int 277 linux_sys_brk(struct lwp *l, const struct linux_sys_brk_args *uap, register_t *retval) 278 { 279 /* { 280 syscallarg(char *) nsize; 281 } */ 282 struct proc *p = l->l_proc; 283 char *nbrk = SCARG(uap, nsize); 284 struct sys_obreak_args oba; 285 struct vmspace *vm = p->p_vmspace; 286 struct linux_emuldata *ed = (struct linux_emuldata*)p->p_emuldata; 287 288 SCARG(&oba, nsize) = nbrk; 289 290 if ((void *) nbrk > vm->vm_daddr && sys_obreak(l, &oba, retval) == 0) 291 ed->s->p_break = (char*)nbrk; 292 else 293 nbrk = ed->s->p_break; 294 295 retval[0] = (register_t)nbrk; 296 297 return 0; 298 } 299 300 /* 301 * Implement the fs stat functions. Straightforward. 302 */ 303 int 304 linux_sys_statfs(struct lwp *l, const struct linux_sys_statfs_args *uap, register_t *retval) 305 { 306 /* { 307 syscallarg(const char *) path; 308 syscallarg(struct linux_statfs *) sp; 309 } */ 310 struct statvfs *sb; 311 struct linux_statfs ltmp; 312 int error; 313 314 sb = STATVFSBUF_GET(); 315 error = do_sys_pstatvfs(l, SCARG(uap, path), ST_WAIT, sb); 316 if (error == 0) { 317 bsd_to_linux_statfs(sb, <mp); 318 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 319 } 320 STATVFSBUF_PUT(sb); 321 322 return error; 323 } 324 325 int 326 linux_sys_fstatfs(struct lwp *l, const struct linux_sys_fstatfs_args *uap, register_t *retval) 327 { 328 /* { 329 syscallarg(int) fd; 330 syscallarg(struct linux_statfs *) sp; 331 } */ 332 struct statvfs *sb; 333 struct linux_statfs ltmp; 334 int error; 335 336 sb = STATVFSBUF_GET(); 337 error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb); 338 if (error == 0) { 339 bsd_to_linux_statfs(sb, <mp); 340 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 341 } 342 STATVFSBUF_PUT(sb); 343 344 return error; 345 } 346 347 /* 348 * uname(). Just copy the info from the various strings stored in the 349 * kernel, and put it in the Linux utsname structure. That structure 350 * is almost the same as the NetBSD one, only it has fields 65 characters 351 * long, and an extra domainname field. 352 */ 353 int 354 linux_sys_uname(struct lwp *l, const struct linux_sys_uname_args *uap, register_t *retval) 355 { 356 /* { 357 syscallarg(struct linux_utsname *) up; 358 } */ 359 struct linux_utsname luts; 360 361 strlcpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 362 strlcpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 363 strlcpy(luts.l_release, linux_release, sizeof(luts.l_release)); 364 strlcpy(luts.l_version, linux_version, sizeof(luts.l_version)); 365 strlcpy(luts.l_machine, LINUX_UNAME_ARCH, sizeof(luts.l_machine)); 366 strlcpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 367 368 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 369 } 370 371 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 372 /* Used indirectly on: arm, i386, m68k */ 373 374 /* 375 * New type Linux mmap call. 376 * Only called directly on machines with >= 6 free regs. 377 */ 378 int 379 linux_sys_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval) 380 { 381 /* { 382 syscallarg(unsigned long) addr; 383 syscallarg(size_t) len; 384 syscallarg(int) prot; 385 syscallarg(int) flags; 386 syscallarg(int) fd; 387 syscallarg(linux_off_t) offset; 388 } */ 389 390 if (SCARG(uap, offset) & PAGE_MASK) 391 return EINVAL; 392 393 return linux_mmap(l, uap, retval, SCARG(uap, offset)); 394 } 395 396 /* 397 * Guts of most architectures' mmap64() implementations. This shares 398 * its list of arguments with linux_sys_mmap(). 399 * 400 * The difference in linux_sys_mmap2() is that "offset" is actually 401 * (offset / pagesize), not an absolute byte count. This translation 402 * to pagesize offsets is done inside glibc between the mmap64() call 403 * point, and the actual syscall. 404 */ 405 int 406 linux_sys_mmap2(struct lwp *l, const struct linux_sys_mmap2_args *uap, register_t *retval) 407 { 408 /* { 409 syscallarg(unsigned long) addr; 410 syscallarg(size_t) len; 411 syscallarg(int) prot; 412 syscallarg(int) flags; 413 syscallarg(int) fd; 414 syscallarg(linux_off_t) offset; 415 } */ 416 417 return linux_mmap(l, uap, retval, 418 ((off_t)SCARG(uap, offset)) << PAGE_SHIFT); 419 } 420 421 /* 422 * Massage arguments and call system mmap(2). 423 */ 424 static int 425 linux_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval, off_t offset) 426 { 427 struct sys_mmap_args cma; 428 int error; 429 size_t mmoff=0; 430 431 linux_to_bsd_mmap_args(&cma, uap); 432 SCARG(&cma, pos) = offset; 433 434 if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN) { 435 /* 436 * Request for stack-like memory segment. On linux, this 437 * works by mmap()ping (small) segment, which is automatically 438 * extended when page fault happens below the currently 439 * allocated area. We emulate this by allocating (typically 440 * bigger) segment sized at current stack size limit, and 441 * offsetting the requested and returned address accordingly. 442 * Since physical pages are only allocated on-demand, this 443 * is effectively identical. 444 */ 445 rlim_t ssl = l->l_proc->p_rlimit[RLIMIT_STACK].rlim_cur; 446 447 if (SCARG(&cma, len) < ssl) { 448 /* Compute the address offset */ 449 mmoff = round_page(ssl) - SCARG(uap, len); 450 451 if (SCARG(&cma, addr)) 452 SCARG(&cma, addr) = (char *)SCARG(&cma, addr) - mmoff; 453 454 SCARG(&cma, len) = (size_t) ssl; 455 } 456 } 457 458 error = sys_mmap(l, &cma, retval); 459 if (error) 460 return (error); 461 462 /* Shift the returned address for stack-like segment if necessary */ 463 retval[0] += mmoff; 464 465 return (0); 466 } 467 468 static void 469 linux_to_bsd_mmap_args(struct sys_mmap_args *cma, const struct linux_sys_mmap_args *uap) 470 { 471 int flags = MAP_TRYFIXED, fl = SCARG(uap, flags); 472 473 flags |= cvtto_bsd_mask(fl, LINUX_MAP_SHARED, MAP_SHARED); 474 flags |= cvtto_bsd_mask(fl, LINUX_MAP_PRIVATE, MAP_PRIVATE); 475 flags |= cvtto_bsd_mask(fl, LINUX_MAP_FIXED, MAP_FIXED); 476 flags |= cvtto_bsd_mask(fl, LINUX_MAP_ANON, MAP_ANON); 477 /* XXX XAX ERH: Any other flags here? There are more defined... */ 478 479 SCARG(cma, addr) = (void *)SCARG(uap, addr); 480 SCARG(cma, len) = SCARG(uap, len); 481 SCARG(cma, prot) = SCARG(uap, prot); 482 if (SCARG(cma, prot) & VM_PROT_WRITE) /* XXX */ 483 SCARG(cma, prot) |= VM_PROT_READ; 484 SCARG(cma, flags) = flags; 485 SCARG(cma, fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 486 SCARG(cma, PAD) = 0; 487 } 488 489 #define LINUX_MREMAP_MAYMOVE 1 490 #define LINUX_MREMAP_FIXED 2 491 492 int 493 linux_sys_mremap(struct lwp *l, const struct linux_sys_mremap_args *uap, register_t *retval) 494 { 495 /* { 496 syscallarg(void *) old_address; 497 syscallarg(size_t) old_size; 498 syscallarg(size_t) new_size; 499 syscallarg(u_long) flags; 500 } */ 501 502 struct proc *p; 503 struct vm_map *map; 504 vaddr_t oldva; 505 vaddr_t newva; 506 size_t oldsize; 507 size_t newsize; 508 int flags; 509 int uvmflags; 510 int error; 511 512 flags = SCARG(uap, flags); 513 oldva = (vaddr_t)SCARG(uap, old_address); 514 oldsize = round_page(SCARG(uap, old_size)); 515 newsize = round_page(SCARG(uap, new_size)); 516 if ((flags & ~(LINUX_MREMAP_FIXED|LINUX_MREMAP_MAYMOVE)) != 0) { 517 error = EINVAL; 518 goto done; 519 } 520 if ((flags & LINUX_MREMAP_FIXED) != 0) { 521 if ((flags & LINUX_MREMAP_MAYMOVE) == 0) { 522 error = EINVAL; 523 goto done; 524 } 525 #if 0 /* notyet */ 526 newva = SCARG(uap, new_address); 527 uvmflags = MAP_FIXED; 528 #else /* notyet */ 529 error = EOPNOTSUPP; 530 goto done; 531 #endif /* notyet */ 532 } else if ((flags & LINUX_MREMAP_MAYMOVE) != 0) { 533 uvmflags = 0; 534 } else { 535 newva = oldva; 536 uvmflags = MAP_FIXED; 537 } 538 p = l->l_proc; 539 map = &p->p_vmspace->vm_map; 540 error = uvm_mremap(map, oldva, oldsize, map, &newva, newsize, p, 541 uvmflags); 542 543 done: 544 *retval = (error != 0) ? 0 : (register_t)newva; 545 return error; 546 } 547 548 int 549 linux_sys_mprotect(struct lwp *l, const struct linux_sys_mprotect_args *uap, register_t *retval) 550 { 551 /* { 552 syscallarg(const void *) start; 553 syscallarg(unsigned long) len; 554 syscallarg(int) prot; 555 } */ 556 struct vm_map_entry *entry; 557 struct vm_map *map; 558 struct proc *p; 559 vaddr_t end, start, len, stacklim; 560 int prot, grows; 561 562 start = (vaddr_t)SCARG(uap, start); 563 len = round_page(SCARG(uap, len)); 564 prot = SCARG(uap, prot); 565 grows = prot & (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP); 566 prot &= ~grows; 567 end = start + len; 568 569 if (start & PAGE_MASK) 570 return EINVAL; 571 if (end < start) 572 return EINVAL; 573 if (end == start) 574 return 0; 575 576 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) 577 return EINVAL; 578 if (grows == (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP)) 579 return EINVAL; 580 581 p = l->l_proc; 582 map = &p->p_vmspace->vm_map; 583 vm_map_lock(map); 584 # ifdef notdef 585 VM_MAP_RANGE_CHECK(map, start, end); 586 # endif 587 if (!uvm_map_lookup_entry(map, start, &entry) || entry->start > start) { 588 vm_map_unlock(map); 589 return ENOMEM; 590 } 591 592 /* 593 * Approximate the behaviour of PROT_GROWS{DOWN,UP}. 594 */ 595 596 stacklim = (vaddr_t)p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur; 597 if (grows & LINUX_PROT_GROWSDOWN) { 598 if (USRSTACK - stacklim <= start && start < USRSTACK) { 599 start = USRSTACK - stacklim; 600 } else { 601 start = entry->start; 602 } 603 } else if (grows & LINUX_PROT_GROWSUP) { 604 if (USRSTACK <= end && end < USRSTACK + stacklim) { 605 end = USRSTACK + stacklim; 606 } else { 607 end = entry->end; 608 } 609 } 610 vm_map_unlock(map); 611 return uvm_map_protect(map, start, end, prot, FALSE); 612 } 613 614 /* 615 * This code is partly stolen from src/lib/libc/compat-43/times.c 616 */ 617 618 #define CONVTCK(r) (r.tv_sec * hz + r.tv_usec / (1000000 / hz)) 619 620 int 621 linux_sys_times(struct lwp *l, const struct linux_sys_times_args *uap, register_t *retval) 622 { 623 /* { 624 syscallarg(struct times *) tms; 625 } */ 626 struct proc *p = l->l_proc; 627 struct timeval t; 628 int error; 629 630 if (SCARG(uap, tms)) { 631 struct linux_tms ltms; 632 struct rusage ru; 633 634 mutex_enter(p->p_lock); 635 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL, NULL); 636 ltms.ltms_utime = CONVTCK(ru.ru_utime); 637 ltms.ltms_stime = CONVTCK(ru.ru_stime); 638 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 639 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 640 mutex_exit(p->p_lock); 641 642 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 643 return error; 644 } 645 646 getmicrouptime(&t); 647 648 retval[0] = ((linux_clock_t)(CONVTCK(t))); 649 return 0; 650 } 651 652 #undef CONVTCK 653 654 /* 655 * Linux 'readdir' call. This code is mostly taken from the 656 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 657 * an attempt has been made to keep it a little cleaner (failing 658 * miserably, because of the cruft needed if count 1 is passed). 659 * 660 * The d_off field should contain the offset of the next valid entry, 661 * but in Linux it has the offset of the entry itself. We emulate 662 * that bug here. 663 * 664 * Read in BSD-style entries, convert them, and copy them out. 665 * 666 * Note that this doesn't handle union-mounted filesystems. 667 */ 668 int 669 linux_sys_getdents(struct lwp *l, const struct linux_sys_getdents_args *uap, register_t *retval) 670 { 671 /* { 672 syscallarg(int) fd; 673 syscallarg(struct linux_dirent *) dent; 674 syscallarg(unsigned int) count; 675 } */ 676 struct dirent *bdp; 677 struct vnode *vp; 678 char *inp, *tbuf; /* BSD-format */ 679 int len, reclen; /* BSD-format */ 680 char *outp; /* Linux-format */ 681 int resid, linux_reclen = 0; /* Linux-format */ 682 struct file *fp; 683 struct uio auio; 684 struct iovec aiov; 685 struct linux_dirent idb; 686 off_t off; /* true file offset */ 687 int buflen, error, eofflag, nbytes, oldcall; 688 struct vattr va; 689 off_t *cookiebuf = NULL, *cookie; 690 int ncookies; 691 692 /* fd_getvnode() will use the descriptor for us */ 693 if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0) 694 return (error); 695 696 if ((fp->f_flag & FREAD) == 0) { 697 error = EBADF; 698 goto out1; 699 } 700 701 vp = (struct vnode *)fp->f_data; 702 if (vp->v_type != VDIR) { 703 error = ENOTDIR; 704 goto out1; 705 } 706 707 if ((error = VOP_GETATTR(vp, &va, l->l_cred))) 708 goto out1; 709 710 nbytes = SCARG(uap, count); 711 if (nbytes == 1) { /* emulating old, broken behaviour */ 712 nbytes = sizeof (idb); 713 buflen = max(va.va_blocksize, nbytes); 714 oldcall = 1; 715 } else { 716 buflen = min(MAXBSIZE, nbytes); 717 if (buflen < va.va_blocksize) 718 buflen = va.va_blocksize; 719 oldcall = 0; 720 } 721 tbuf = malloc(buflen, M_TEMP, M_WAITOK); 722 723 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 724 off = fp->f_offset; 725 again: 726 aiov.iov_base = tbuf; 727 aiov.iov_len = buflen; 728 auio.uio_iov = &aiov; 729 auio.uio_iovcnt = 1; 730 auio.uio_rw = UIO_READ; 731 auio.uio_resid = buflen; 732 auio.uio_offset = off; 733 UIO_SETUP_SYSSPACE(&auio); 734 /* 735 * First we read into the malloc'ed buffer, then 736 * we massage it into user space, one record at a time. 737 */ 738 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 739 &ncookies); 740 if (error) 741 goto out; 742 743 inp = tbuf; 744 outp = (void *)SCARG(uap, dent); 745 resid = nbytes; 746 if ((len = buflen - auio.uio_resid) == 0) 747 goto eof; 748 749 for (cookie = cookiebuf; len > 0; len -= reclen) { 750 bdp = (struct dirent *)inp; 751 reclen = bdp->d_reclen; 752 if (reclen & 3) 753 panic("linux_readdir"); 754 if (bdp->d_fileno == 0) { 755 inp += reclen; /* it is a hole; squish it out */ 756 if (cookie) 757 off = *cookie++; 758 else 759 off += reclen; 760 continue; 761 } 762 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 763 if (reclen > len || resid < linux_reclen) { 764 /* entry too big for buffer, so just stop */ 765 outp++; 766 break; 767 } 768 /* 769 * Massage in place to make a Linux-shaped dirent (otherwise 770 * we have to worry about touching user memory outside of 771 * the copyout() call). 772 */ 773 idb.d_ino = bdp->d_fileno; 774 /* 775 * The old readdir() call misuses the offset and reclen fields. 776 */ 777 if (oldcall) { 778 idb.d_off = (linux_off_t)linux_reclen; 779 idb.d_reclen = (u_short)bdp->d_namlen; 780 } else { 781 if (sizeof (idb.d_off) <= 4 && (off >> 32) != 0) { 782 compat_offseterr(vp, "linux_getdents"); 783 error = EINVAL; 784 goto out; 785 } 786 idb.d_off = (linux_off_t)off; 787 idb.d_reclen = (u_short)linux_reclen; 788 } 789 strcpy(idb.d_name, bdp->d_name); 790 if ((error = copyout((void *)&idb, outp, linux_reclen))) 791 goto out; 792 /* advance past this real entry */ 793 inp += reclen; 794 if (cookie) 795 off = *cookie++; /* each entry points to itself */ 796 else 797 off += reclen; 798 /* advance output past Linux-shaped entry */ 799 outp += linux_reclen; 800 resid -= linux_reclen; 801 if (oldcall) 802 break; 803 } 804 805 /* if we squished out the whole block, try again */ 806 if (outp == (void *)SCARG(uap, dent)) 807 goto again; 808 fp->f_offset = off; /* update the vnode offset */ 809 810 if (oldcall) 811 nbytes = resid + linux_reclen; 812 813 eof: 814 *retval = nbytes - resid; 815 out: 816 VOP_UNLOCK(vp, 0); 817 if (cookiebuf) 818 free(cookiebuf, M_TEMP); 819 free(tbuf, M_TEMP); 820 out1: 821 fd_putfile(SCARG(uap, fd)); 822 return error; 823 } 824 825 /* 826 * Even when just using registers to pass arguments to syscalls you can 827 * have 5 of them on the i386. So this newer version of select() does 828 * this. 829 */ 830 int 831 linux_sys_select(struct lwp *l, const struct linux_sys_select_args *uap, register_t *retval) 832 { 833 /* { 834 syscallarg(int) nfds; 835 syscallarg(fd_set *) readfds; 836 syscallarg(fd_set *) writefds; 837 syscallarg(fd_set *) exceptfds; 838 syscallarg(struct timeval50 *) timeout; 839 } */ 840 841 return linux_select1(l, retval, SCARG(uap, nfds), SCARG(uap, readfds), 842 SCARG(uap, writefds), SCARG(uap, exceptfds), 843 (struct linux_timeval *)SCARG(uap, timeout)); 844 } 845 846 /* 847 * Common code for the old and new versions of select(). A couple of 848 * things are important: 849 * 1) return the amount of time left in the 'timeout' parameter 850 * 2) select never returns ERESTART on Linux, always return EINTR 851 */ 852 int 853 linux_select1(struct lwp *l, register_t *retval, int nfds, fd_set *readfds, 854 fd_set *writefds, fd_set *exceptfds, struct linux_timeval *timeout) 855 { 856 struct timespec ts0, ts1, uts, *ts = NULL; 857 struct linux_timeval ltv; 858 int error; 859 860 /* 861 * Store current time for computation of the amount of 862 * time left. 863 */ 864 if (timeout) { 865 if ((error = copyin(timeout, <v, sizeof(ltv)))) 866 return error; 867 uts.tv_sec = ltv.tv_sec; 868 uts.tv_nsec = ltv.tv_usec * 1000; 869 if (itimespecfix(&uts)) { 870 /* 871 * The timeval was invalid. Convert it to something 872 * valid that will act as it does under Linux. 873 */ 874 uts.tv_sec += uts.tv_nsec / 1000000000; 875 uts.tv_nsec %= 1000000000; 876 if (uts.tv_nsec < 0) { 877 uts.tv_sec -= 1; 878 uts.tv_nsec += 1000000000; 879 } 880 if (uts.tv_sec < 0) 881 timespecclear(&uts); 882 } 883 ts = &uts; 884 nanotime(&ts0); 885 } 886 887 error = selcommon(retval, nfds, readfds, writefds, exceptfds, ts, NULL); 888 889 if (error) { 890 /* 891 * See fs/select.c in the Linux kernel. Without this, 892 * Maelstrom doesn't work. 893 */ 894 if (error == ERESTART) 895 error = EINTR; 896 return error; 897 } 898 899 if (timeout) { 900 if (*retval) { 901 /* 902 * Compute how much time was left of the timeout, 903 * by subtracting the current time and the time 904 * before we started the call, and subtracting 905 * that result from the user-supplied value. 906 */ 907 nanotime(&ts1); 908 timespecsub(&ts1, &ts0, &ts1); 909 timespecsub(&uts, &ts1, &uts); 910 if (uts.tv_sec < 0) 911 timespecclear(&uts); 912 } else 913 timespecclear(&uts); 914 ltv.tv_sec = uts.tv_sec; 915 ltv.tv_usec = uts.tv_nsec / 1000; 916 if ((error = copyout(<v, timeout, sizeof(ltv)))) 917 return error; 918 } 919 920 return 0; 921 } 922 923 /* 924 * Set the 'personality' (emulation mode) for the current process. Only 925 * accept the Linux personality here (0). This call is needed because 926 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 927 * ELF binaries run in Linux mode, not SVR4 mode. 928 */ 929 int 930 linux_sys_personality(struct lwp *l, const struct linux_sys_personality_args *uap, register_t *retval) 931 { 932 /* { 933 syscallarg(unsigned long) per; 934 } */ 935 936 switch (SCARG(uap, per)) { 937 case LINUX_PER_LINUX: 938 case LINUX_PER_QUERY: 939 break; 940 default: 941 return EINVAL; 942 } 943 944 retval[0] = LINUX_PER_LINUX; 945 return 0; 946 } 947 948 /* 949 * We have nonexistent fsuid equal to uid. 950 * If modification is requested, refuse. 951 */ 952 int 953 linux_sys_setfsuid(struct lwp *l, const struct linux_sys_setfsuid_args *uap, register_t *retval) 954 { 955 /* { 956 syscallarg(uid_t) uid; 957 } */ 958 uid_t uid; 959 960 uid = SCARG(uap, uid); 961 if (kauth_cred_getuid(l->l_cred) != uid) 962 return sys_nosys(l, uap, retval); 963 964 *retval = uid; 965 return 0; 966 } 967 968 int 969 linux_sys_setfsgid(struct lwp *l, const struct linux_sys_setfsgid_args *uap, register_t *retval) 970 { 971 /* { 972 syscallarg(gid_t) gid; 973 } */ 974 gid_t gid; 975 976 gid = SCARG(uap, gid); 977 if (kauth_cred_getgid(l->l_cred) != gid) 978 return sys_nosys(l, uap, retval); 979 980 *retval = gid; 981 return 0; 982 } 983 984 int 985 linux_sys_setresuid(struct lwp *l, const struct linux_sys_setresuid_args *uap, register_t *retval) 986 { 987 /* { 988 syscallarg(uid_t) ruid; 989 syscallarg(uid_t) euid; 990 syscallarg(uid_t) suid; 991 } */ 992 993 /* 994 * Note: These checks are a little different than the NetBSD 995 * setreuid(2) call performs. This precisely follows the 996 * behavior of the Linux kernel. 997 */ 998 999 return do_setresuid(l, SCARG(uap, ruid), SCARG(uap, euid), 1000 SCARG(uap, suid), 1001 ID_R_EQ_R | ID_R_EQ_E | ID_R_EQ_S | 1002 ID_E_EQ_R | ID_E_EQ_E | ID_E_EQ_S | 1003 ID_S_EQ_R | ID_S_EQ_E | ID_S_EQ_S ); 1004 } 1005 1006 int 1007 linux_sys_getresuid(struct lwp *l, const struct linux_sys_getresuid_args *uap, register_t *retval) 1008 { 1009 /* { 1010 syscallarg(uid_t *) ruid; 1011 syscallarg(uid_t *) euid; 1012 syscallarg(uid_t *) suid; 1013 } */ 1014 kauth_cred_t pc = l->l_cred; 1015 int error; 1016 uid_t uid; 1017 1018 /* 1019 * Linux copies these values out to userspace like so: 1020 * 1021 * 1. Copy out ruid. 1022 * 2. If that succeeds, copy out euid. 1023 * 3. If both of those succeed, copy out suid. 1024 */ 1025 uid = kauth_cred_getuid(pc); 1026 if ((error = copyout(&uid, SCARG(uap, ruid), sizeof(uid_t))) != 0) 1027 return (error); 1028 1029 uid = kauth_cred_geteuid(pc); 1030 if ((error = copyout(&uid, SCARG(uap, euid), sizeof(uid_t))) != 0) 1031 return (error); 1032 1033 uid = kauth_cred_getsvuid(pc); 1034 1035 return (copyout(&uid, SCARG(uap, suid), sizeof(uid_t))); 1036 } 1037 1038 int 1039 linux_sys_ptrace(struct lwp *l, const struct linux_sys_ptrace_args *uap, register_t *retval) 1040 { 1041 /* { 1042 i386, m68k, powerpc: T=int 1043 alpha, amd64: T=long 1044 syscallarg(T) request; 1045 syscallarg(T) pid; 1046 syscallarg(T) addr; 1047 syscallarg(T) data; 1048 } */ 1049 const int *ptr; 1050 int request; 1051 int error; 1052 1053 ptr = linux_ptrace_request_map; 1054 request = SCARG(uap, request); 1055 while (*ptr != -1) 1056 if (*ptr++ == request) { 1057 struct sys_ptrace_args pta; 1058 1059 SCARG(&pta, req) = *ptr; 1060 SCARG(&pta, pid) = SCARG(uap, pid); 1061 SCARG(&pta, addr) = (void *)SCARG(uap, addr); 1062 SCARG(&pta, data) = SCARG(uap, data); 1063 1064 /* 1065 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1066 * to continue where the process left off previously. 1067 * The same thing is achieved by addr == (void *) 1 1068 * on NetBSD, so rewrite 'addr' appropriately. 1069 */ 1070 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1071 SCARG(&pta, addr) = (void *) 1; 1072 1073 error = sysent[SYS_ptrace].sy_call(l, &pta, retval); 1074 if (error) 1075 return error; 1076 switch (request) { 1077 case LINUX_PTRACE_PEEKTEXT: 1078 case LINUX_PTRACE_PEEKDATA: 1079 error = copyout (retval, 1080 (void *)SCARG(uap, data), 1081 sizeof *retval); 1082 *retval = SCARG(uap, data); 1083 break; 1084 default: 1085 break; 1086 } 1087 return error; 1088 } 1089 else 1090 ptr++; 1091 1092 return LINUX_SYS_PTRACE_ARCH(l, uap, retval); 1093 } 1094 1095 int 1096 linux_sys_reboot(struct lwp *l, const struct linux_sys_reboot_args *uap, register_t *retval) 1097 { 1098 /* { 1099 syscallarg(int) magic1; 1100 syscallarg(int) magic2; 1101 syscallarg(int) cmd; 1102 syscallarg(void *) arg; 1103 } */ 1104 struct sys_reboot_args /* { 1105 syscallarg(int) opt; 1106 syscallarg(char *) bootstr; 1107 } */ sra; 1108 int error; 1109 1110 if ((error = kauth_authorize_system(l->l_cred, 1111 KAUTH_SYSTEM_REBOOT, 0, NULL, NULL, NULL)) != 0) 1112 return(error); 1113 1114 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1115 return(EINVAL); 1116 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1117 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1118 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1119 return(EINVAL); 1120 1121 switch ((unsigned long)SCARG(uap, cmd)) { 1122 case LINUX_REBOOT_CMD_RESTART: 1123 SCARG(&sra, opt) = RB_AUTOBOOT; 1124 break; 1125 case LINUX_REBOOT_CMD_HALT: 1126 SCARG(&sra, opt) = RB_HALT; 1127 break; 1128 case LINUX_REBOOT_CMD_POWER_OFF: 1129 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1130 break; 1131 case LINUX_REBOOT_CMD_RESTART2: 1132 /* Reboot with an argument. */ 1133 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1134 SCARG(&sra, bootstr) = SCARG(uap, arg); 1135 break; 1136 case LINUX_REBOOT_CMD_CAD_ON: 1137 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1138 case LINUX_REBOOT_CMD_CAD_OFF: 1139 return(0); 1140 default: 1141 return(EINVAL); 1142 } 1143 1144 return(sys_reboot(l, &sra, retval)); 1145 } 1146 1147 /* 1148 * Copy of compat_12_sys_swapon(). 1149 */ 1150 int 1151 linux_sys_swapon(struct lwp *l, const struct linux_sys_swapon_args *uap, register_t *retval) 1152 { 1153 /* { 1154 syscallarg(const char *) name; 1155 } */ 1156 struct sys_swapctl_args ua; 1157 1158 SCARG(&ua, cmd) = SWAP_ON; 1159 SCARG(&ua, arg) = (void *)__UNCONST(SCARG(uap, name)); 1160 SCARG(&ua, misc) = 0; /* priority */ 1161 return (sys_swapctl(l, &ua, retval)); 1162 } 1163 1164 /* 1165 * Stop swapping to the file or block device specified by path. 1166 */ 1167 int 1168 linux_sys_swapoff(struct lwp *l, const struct linux_sys_swapoff_args *uap, register_t *retval) 1169 { 1170 /* { 1171 syscallarg(const char *) path; 1172 } */ 1173 struct sys_swapctl_args ua; 1174 1175 SCARG(&ua, cmd) = SWAP_OFF; 1176 SCARG(&ua, arg) = __UNCONST(SCARG(uap, path)); /*XXXUNCONST*/ 1177 return (sys_swapctl(l, &ua, retval)); 1178 } 1179 1180 /* 1181 * Copy of compat_09_sys_setdomainname() 1182 */ 1183 /* ARGSUSED */ 1184 int 1185 linux_sys_setdomainname(struct lwp *l, const struct linux_sys_setdomainname_args *uap, register_t *retval) 1186 { 1187 /* { 1188 syscallarg(char *) domainname; 1189 syscallarg(int) len; 1190 } */ 1191 int name[2]; 1192 1193 name[0] = CTL_KERN; 1194 name[1] = KERN_DOMAINNAME; 1195 return (old_sysctl(&name[0], 2, 0, 0, SCARG(uap, domainname), 1196 SCARG(uap, len), l)); 1197 } 1198 1199 /* 1200 * sysinfo() 1201 */ 1202 /* ARGSUSED */ 1203 int 1204 linux_sys_sysinfo(struct lwp *l, const struct linux_sys_sysinfo_args *uap, register_t *retval) 1205 { 1206 /* { 1207 syscallarg(struct linux_sysinfo *) arg; 1208 } */ 1209 struct linux_sysinfo si; 1210 struct loadavg *la; 1211 1212 si.uptime = time_uptime; 1213 la = &averunnable; 1214 si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1215 si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1216 si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1217 si.totalram = ctob((u_long)physmem); 1218 si.freeram = (u_long)uvmexp.free * uvmexp.pagesize; 1219 si.sharedram = 0; /* XXX */ 1220 si.bufferram = (u_long)uvmexp.filepages * uvmexp.pagesize; 1221 si.totalswap = (u_long)uvmexp.swpages * uvmexp.pagesize; 1222 si.freeswap = 1223 (u_long)(uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize; 1224 si.procs = nprocs; 1225 1226 /* The following are only present in newer Linux kernels. */ 1227 si.totalbig = 0; 1228 si.freebig = 0; 1229 si.mem_unit = 1; 1230 1231 return (copyout(&si, SCARG(uap, arg), sizeof si)); 1232 } 1233 1234 int 1235 linux_sys_getrlimit(struct lwp *l, const struct linux_sys_getrlimit_args *uap, register_t *retval) 1236 { 1237 /* { 1238 syscallarg(int) which; 1239 # ifdef LINUX_LARGEFILE64 1240 syscallarg(struct rlimit *) rlp; 1241 # else 1242 syscallarg(struct orlimit *) rlp; 1243 # endif 1244 } */ 1245 # ifdef LINUX_LARGEFILE64 1246 struct rlimit orl; 1247 # else 1248 struct orlimit orl; 1249 # endif 1250 int which; 1251 1252 which = linux_to_bsd_limit(SCARG(uap, which)); 1253 if (which < 0) 1254 return -which; 1255 1256 bsd_to_linux_rlimit(&orl, &l->l_proc->p_rlimit[which]); 1257 1258 return copyout(&orl, SCARG(uap, rlp), sizeof(orl)); 1259 } 1260 1261 int 1262 linux_sys_setrlimit(struct lwp *l, const struct linux_sys_setrlimit_args *uap, register_t *retval) 1263 { 1264 /* { 1265 syscallarg(int) which; 1266 # ifdef LINUX_LARGEFILE64 1267 syscallarg(struct rlimit *) rlp; 1268 # else 1269 syscallarg(struct orlimit *) rlp; 1270 # endif 1271 } */ 1272 struct rlimit rl; 1273 # ifdef LINUX_LARGEFILE64 1274 struct rlimit orl; 1275 # else 1276 struct orlimit orl; 1277 # endif 1278 int error; 1279 int which; 1280 1281 if ((error = copyin(SCARG(uap, rlp), &orl, sizeof(orl))) != 0) 1282 return error; 1283 1284 which = linux_to_bsd_limit(SCARG(uap, which)); 1285 if (which < 0) 1286 return -which; 1287 1288 linux_to_bsd_rlimit(&rl, &orl); 1289 return dosetrlimit(l, l->l_proc, which, &rl); 1290 } 1291 1292 # if !defined(__mips__) && !defined(__amd64__) 1293 /* XXX: this doesn't look 100% common, at least mips doesn't have it */ 1294 int 1295 linux_sys_ugetrlimit(struct lwp *l, const struct linux_sys_ugetrlimit_args *uap, register_t *retval) 1296 { 1297 return linux_sys_getrlimit(l, (const void *)uap, retval); 1298 } 1299 # endif 1300 1301 /* 1302 * This gets called for unsupported syscalls. The difference to sys_nosys() 1303 * is that process does not get SIGSYS, the call just returns with ENOSYS. 1304 * This is the way Linux does it and glibc depends on this behaviour. 1305 */ 1306 int 1307 linux_sys_nosys(struct lwp *l, const void *v, register_t *retval) 1308 { 1309 return (ENOSYS); 1310 } 1311 1312 int 1313 linux_sys_getpriority(struct lwp *l, const struct linux_sys_getpriority_args *uap, register_t *retval) 1314 { 1315 /* { 1316 syscallarg(int) which; 1317 syscallarg(int) who; 1318 } */ 1319 struct sys_getpriority_args bsa; 1320 int error; 1321 1322 SCARG(&bsa, which) = SCARG(uap, which); 1323 SCARG(&bsa, who) = SCARG(uap, who); 1324 1325 if ((error = sys_getpriority(l, &bsa, retval))) 1326 return error; 1327 1328 *retval = NZERO - *retval; 1329 1330 return 0; 1331 } 1332 1333 #endif /* !COMPAT_LINUX32 */ 1334