1 /* $NetBSD: linux_misc.c,v 1.224 2013/08/11 09:07:15 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 1.224 2013/08/11 09:07:15 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/poll.h> 77 #include <sys/prot.h> 78 #include <sys/reboot.h> 79 #include <sys/resource.h> 80 #include <sys/resourcevar.h> 81 #include <sys/select.h> 82 #include <sys/signal.h> 83 #include <sys/signalvar.h> 84 #include <sys/socket.h> 85 #include <sys/time.h> 86 #include <sys/times.h> 87 #include <sys/vnode.h> 88 #include <sys/uio.h> 89 #include <sys/wait.h> 90 #include <sys/utsname.h> 91 #include <sys/unistd.h> 92 #include <sys/vfs_syscalls.h> 93 #include <sys/swap.h> /* for SWAP_ON */ 94 #include <sys/sysctl.h> /* for KERN_DOMAINNAME */ 95 #include <sys/kauth.h> 96 97 #include <sys/ptrace.h> 98 #include <machine/ptrace.h> 99 100 #include <sys/syscall.h> 101 #include <sys/syscallargs.h> 102 103 #include <compat/sys/resource.h> 104 105 #include <compat/linux/common/linux_machdep.h> 106 #include <compat/linux/common/linux_types.h> 107 #include <compat/linux/common/linux_signal.h> 108 #include <compat/linux/common/linux_ipc.h> 109 #include <compat/linux/common/linux_sem.h> 110 111 #include <compat/linux/common/linux_fcntl.h> 112 #include <compat/linux/common/linux_mmap.h> 113 #include <compat/linux/common/linux_dirent.h> 114 #include <compat/linux/common/linux_util.h> 115 #include <compat/linux/common/linux_misc.h> 116 #ifndef COMPAT_LINUX32 117 #include <compat/linux/common/linux_statfs.h> 118 #include <compat/linux/common/linux_limit.h> 119 #endif 120 #include <compat/linux/common/linux_ptrace.h> 121 #include <compat/linux/common/linux_reboot.h> 122 #include <compat/linux/common/linux_emuldata.h> 123 #include <compat/linux/common/linux_sched.h> 124 125 #include <compat/linux/linux_syscallargs.h> 126 127 #ifndef COMPAT_LINUX32 128 const int linux_ptrace_request_map[] = { 129 LINUX_PTRACE_TRACEME, PT_TRACE_ME, 130 LINUX_PTRACE_PEEKTEXT, PT_READ_I, 131 LINUX_PTRACE_PEEKDATA, PT_READ_D, 132 LINUX_PTRACE_POKETEXT, PT_WRITE_I, 133 LINUX_PTRACE_POKEDATA, PT_WRITE_D, 134 LINUX_PTRACE_CONT, PT_CONTINUE, 135 LINUX_PTRACE_KILL, PT_KILL, 136 LINUX_PTRACE_ATTACH, PT_ATTACH, 137 LINUX_PTRACE_DETACH, PT_DETACH, 138 # ifdef PT_STEP 139 LINUX_PTRACE_SINGLESTEP, PT_STEP, 140 # endif 141 LINUX_PTRACE_SYSCALL, PT_SYSCALL, 142 -1 143 }; 144 145 const struct linux_mnttypes linux_fstypes[] = { 146 { MOUNT_FFS, LINUX_DEFAULT_SUPER_MAGIC }, 147 { MOUNT_NFS, LINUX_NFS_SUPER_MAGIC }, 148 { MOUNT_MFS, LINUX_DEFAULT_SUPER_MAGIC }, 149 { MOUNT_MSDOS, LINUX_MSDOS_SUPER_MAGIC }, 150 { MOUNT_LFS, LINUX_DEFAULT_SUPER_MAGIC }, 151 { MOUNT_FDESC, LINUX_DEFAULT_SUPER_MAGIC }, 152 { MOUNT_NULL, LINUX_DEFAULT_SUPER_MAGIC }, 153 { MOUNT_OVERLAY, LINUX_DEFAULT_SUPER_MAGIC }, 154 { MOUNT_UMAP, LINUX_DEFAULT_SUPER_MAGIC }, 155 { MOUNT_KERNFS, LINUX_DEFAULT_SUPER_MAGIC }, 156 { MOUNT_PROCFS, LINUX_PROC_SUPER_MAGIC }, 157 { MOUNT_AFS, LINUX_DEFAULT_SUPER_MAGIC }, 158 { MOUNT_CD9660, LINUX_ISOFS_SUPER_MAGIC }, 159 { MOUNT_UNION, LINUX_DEFAULT_SUPER_MAGIC }, 160 { MOUNT_ADOSFS, LINUX_ADFS_SUPER_MAGIC }, 161 { MOUNT_EXT2FS, LINUX_EXT2_SUPER_MAGIC }, 162 { MOUNT_CFS, LINUX_DEFAULT_SUPER_MAGIC }, 163 { MOUNT_CODA, LINUX_CODA_SUPER_MAGIC }, 164 { MOUNT_FILECORE, LINUX_DEFAULT_SUPER_MAGIC }, 165 { MOUNT_NTFS, LINUX_DEFAULT_SUPER_MAGIC }, 166 { MOUNT_SMBFS, LINUX_SMB_SUPER_MAGIC }, 167 { MOUNT_PTYFS, LINUX_DEVPTS_SUPER_MAGIC }, 168 { MOUNT_TMPFS, LINUX_TMPFS_SUPER_MAGIC } 169 }; 170 const int linux_fstypes_cnt = sizeof(linux_fstypes) / sizeof(linux_fstypes[0]); 171 172 # ifdef DEBUG_LINUX 173 #define DPRINTF(a) uprintf a 174 # else 175 #define DPRINTF(a) 176 # endif 177 178 /* Local linux_misc.c functions: */ 179 static void linux_to_bsd_mmap_args(struct sys_mmap_args *, 180 const struct linux_sys_mmap_args *); 181 static int linux_mmap(struct lwp *, const struct linux_sys_mmap_args *, 182 register_t *, off_t); 183 184 185 /* 186 * The information on a terminated (or stopped) process needs 187 * to be converted in order for Linux binaries to get a valid signal 188 * number out of it. 189 */ 190 int 191 bsd_to_linux_wstat(int st) 192 { 193 194 int sig; 195 196 if (WIFSIGNALED(st)) { 197 sig = WTERMSIG(st); 198 if (sig >= 0 && sig < NSIG) 199 st= (st & ~0177) | native_to_linux_signo[sig]; 200 } else if (WIFSTOPPED(st)) { 201 sig = WSTOPSIG(st); 202 if (sig >= 0 && sig < NSIG) 203 st = (st & ~0xff00) | 204 (native_to_linux_signo[sig] << 8); 205 } 206 return st; 207 } 208 209 /* 210 * wait4(2). Passed on to the NetBSD call, surrounded by code to 211 * reserve some space for a NetBSD-style wait status, and converting 212 * it to what Linux wants. 213 */ 214 int 215 linux_sys_wait4(struct lwp *l, const struct linux_sys_wait4_args *uap, register_t *retval) 216 { 217 /* { 218 syscallarg(int) pid; 219 syscallarg(int *) status; 220 syscallarg(int) options; 221 syscallarg(struct rusage50 *) rusage; 222 } */ 223 int error, status, options, linux_options, pid = SCARG(uap, pid); 224 struct rusage50 ru50; 225 struct rusage ru; 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(&pid, &status, options, 250 SCARG(uap, rusage) != NULL ? &ru : NULL); 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). Like native, but always return the new break value. 276 */ 277 int 278 linux_sys_brk(struct lwp *l, const struct linux_sys_brk_args *uap, register_t *retval) 279 { 280 /* { 281 syscallarg(char *) nsize; 282 } */ 283 struct proc *p = l->l_proc; 284 struct vmspace *vm = p->p_vmspace; 285 struct sys_obreak_args oba; 286 287 SCARG(&oba, nsize) = SCARG(uap, nsize); 288 289 (void) sys_obreak(l, &oba, retval); 290 retval[0] = (register_t)((char *)vm->vm_daddr + ptoa(vm->vm_dsize)); 291 return 0; 292 } 293 294 /* 295 * Implement the fs stat functions. Straightforward. 296 */ 297 int 298 linux_sys_statfs(struct lwp *l, const struct linux_sys_statfs_args *uap, register_t *retval) 299 { 300 /* { 301 syscallarg(const char *) path; 302 syscallarg(struct linux_statfs *) sp; 303 } */ 304 struct statvfs *sb; 305 struct linux_statfs ltmp; 306 int error; 307 308 sb = STATVFSBUF_GET(); 309 error = do_sys_pstatvfs(l, SCARG(uap, path), ST_WAIT, sb); 310 if (error == 0) { 311 bsd_to_linux_statfs(sb, <mp); 312 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 313 } 314 STATVFSBUF_PUT(sb); 315 316 return error; 317 } 318 319 int 320 linux_sys_fstatfs(struct lwp *l, const struct linux_sys_fstatfs_args *uap, register_t *retval) 321 { 322 /* { 323 syscallarg(int) fd; 324 syscallarg(struct linux_statfs *) sp; 325 } */ 326 struct statvfs *sb; 327 struct linux_statfs ltmp; 328 int error; 329 330 sb = STATVFSBUF_GET(); 331 error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb); 332 if (error == 0) { 333 bsd_to_linux_statfs(sb, <mp); 334 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 335 } 336 STATVFSBUF_PUT(sb); 337 338 return error; 339 } 340 341 /* 342 * uname(). Just copy the info from the various strings stored in the 343 * kernel, and put it in the Linux utsname structure. That structure 344 * is almost the same as the NetBSD one, only it has fields 65 characters 345 * long, and an extra domainname field. 346 */ 347 int 348 linux_sys_uname(struct lwp *l, const struct linux_sys_uname_args *uap, register_t *retval) 349 { 350 /* { 351 syscallarg(struct linux_utsname *) up; 352 } */ 353 struct linux_utsname luts; 354 355 strlcpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 356 strlcpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 357 strlcpy(luts.l_release, linux_release, sizeof(luts.l_release)); 358 strlcpy(luts.l_version, linux_version, sizeof(luts.l_version)); 359 strlcpy(luts.l_machine, LINUX_UNAME_ARCH, sizeof(luts.l_machine)); 360 strlcpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 361 362 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 363 } 364 365 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 366 /* Used indirectly on: arm, i386, m68k */ 367 368 /* 369 * New type Linux mmap call. 370 * Only called directly on machines with >= 6 free regs. 371 */ 372 int 373 linux_sys_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval) 374 { 375 /* { 376 syscallarg(unsigned long) addr; 377 syscallarg(size_t) len; 378 syscallarg(int) prot; 379 syscallarg(int) flags; 380 syscallarg(int) fd; 381 syscallarg(linux_off_t) offset; 382 } */ 383 384 if (SCARG(uap, offset) & PAGE_MASK) 385 return EINVAL; 386 387 return linux_mmap(l, uap, retval, SCARG(uap, offset)); 388 } 389 390 /* 391 * Guts of most architectures' mmap64() implementations. This shares 392 * its list of arguments with linux_sys_mmap(). 393 * 394 * The difference in linux_sys_mmap2() is that "offset" is actually 395 * (offset / pagesize), not an absolute byte count. This translation 396 * to pagesize offsets is done inside glibc between the mmap64() call 397 * point, and the actual syscall. 398 */ 399 int 400 linux_sys_mmap2(struct lwp *l, const struct linux_sys_mmap2_args *uap, register_t *retval) 401 { 402 /* { 403 syscallarg(unsigned long) addr; 404 syscallarg(size_t) len; 405 syscallarg(int) prot; 406 syscallarg(int) flags; 407 syscallarg(int) fd; 408 syscallarg(linux_off_t) offset; 409 } */ 410 411 return linux_mmap(l, uap, retval, 412 ((off_t)SCARG(uap, offset)) << PAGE_SHIFT); 413 } 414 415 /* 416 * Massage arguments and call system mmap(2). 417 */ 418 static int 419 linux_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval, off_t offset) 420 { 421 struct sys_mmap_args cma; 422 int error; 423 size_t mmoff=0; 424 425 linux_to_bsd_mmap_args(&cma, uap); 426 SCARG(&cma, pos) = offset; 427 428 if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN) { 429 /* 430 * Request for stack-like memory segment. On linux, this 431 * works by mmap()ping (small) segment, which is automatically 432 * extended when page fault happens below the currently 433 * allocated area. We emulate this by allocating (typically 434 * bigger) segment sized at current stack size limit, and 435 * offsetting the requested and returned address accordingly. 436 * Since physical pages are only allocated on-demand, this 437 * is effectively identical. 438 */ 439 rlim_t ssl = l->l_proc->p_rlimit[RLIMIT_STACK].rlim_cur; 440 441 if (SCARG(&cma, len) < ssl) { 442 /* Compute the address offset */ 443 mmoff = round_page(ssl) - SCARG(uap, len); 444 445 if (SCARG(&cma, addr)) 446 SCARG(&cma, addr) = (char *)SCARG(&cma, addr) - mmoff; 447 448 SCARG(&cma, len) = (size_t) ssl; 449 } 450 } 451 452 error = sys_mmap(l, &cma, retval); 453 if (error) 454 return (error); 455 456 /* Shift the returned address for stack-like segment if necessary */ 457 retval[0] += mmoff; 458 459 return (0); 460 } 461 462 static void 463 linux_to_bsd_mmap_args(struct sys_mmap_args *cma, const struct linux_sys_mmap_args *uap) 464 { 465 int flags = MAP_TRYFIXED, fl = SCARG(uap, flags); 466 467 flags |= cvtto_bsd_mask(fl, LINUX_MAP_SHARED, MAP_SHARED); 468 flags |= cvtto_bsd_mask(fl, LINUX_MAP_PRIVATE, MAP_PRIVATE); 469 flags |= cvtto_bsd_mask(fl, LINUX_MAP_FIXED, MAP_FIXED); 470 flags |= cvtto_bsd_mask(fl, LINUX_MAP_ANON, MAP_ANON); 471 /* XXX XAX ERH: Any other flags here? There are more defined... */ 472 473 SCARG(cma, addr) = (void *)SCARG(uap, addr); 474 SCARG(cma, len) = SCARG(uap, len); 475 SCARG(cma, prot) = SCARG(uap, prot); 476 if (SCARG(cma, prot) & VM_PROT_WRITE) /* XXX */ 477 SCARG(cma, prot) |= VM_PROT_READ; 478 SCARG(cma, flags) = flags; 479 SCARG(cma, fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 480 SCARG(cma, PAD) = 0; 481 } 482 483 #define LINUX_MREMAP_MAYMOVE 1 484 #define LINUX_MREMAP_FIXED 2 485 486 int 487 linux_sys_mremap(struct lwp *l, const struct linux_sys_mremap_args *uap, register_t *retval) 488 { 489 /* { 490 syscallarg(void *) old_address; 491 syscallarg(size_t) old_size; 492 syscallarg(size_t) new_size; 493 syscallarg(u_long) flags; 494 } */ 495 496 struct proc *p; 497 struct vm_map *map; 498 vaddr_t oldva; 499 vaddr_t newva; 500 size_t oldsize; 501 size_t newsize; 502 int flags; 503 int uvmflags; 504 int error; 505 506 flags = SCARG(uap, flags); 507 oldva = (vaddr_t)SCARG(uap, old_address); 508 oldsize = round_page(SCARG(uap, old_size)); 509 newsize = round_page(SCARG(uap, new_size)); 510 if ((flags & ~(LINUX_MREMAP_FIXED|LINUX_MREMAP_MAYMOVE)) != 0) { 511 error = EINVAL; 512 goto done; 513 } 514 if ((flags & LINUX_MREMAP_FIXED) != 0) { 515 if ((flags & LINUX_MREMAP_MAYMOVE) == 0) { 516 error = EINVAL; 517 goto done; 518 } 519 #if 0 /* notyet */ 520 newva = SCARG(uap, new_address); 521 uvmflags = MAP_FIXED; 522 #else /* notyet */ 523 error = EOPNOTSUPP; 524 goto done; 525 #endif /* notyet */ 526 } else if ((flags & LINUX_MREMAP_MAYMOVE) != 0) { 527 uvmflags = 0; 528 } else { 529 newva = oldva; 530 uvmflags = MAP_FIXED; 531 } 532 p = l->l_proc; 533 map = &p->p_vmspace->vm_map; 534 error = uvm_mremap(map, oldva, oldsize, map, &newva, newsize, p, 535 uvmflags); 536 537 done: 538 *retval = (error != 0) ? 0 : (register_t)newva; 539 return error; 540 } 541 542 #ifdef USRSTACK 543 int 544 linux_sys_mprotect(struct lwp *l, const struct linux_sys_mprotect_args *uap, register_t *retval) 545 { 546 /* { 547 syscallarg(const void *) start; 548 syscallarg(unsigned long) len; 549 syscallarg(int) prot; 550 } */ 551 struct vm_map_entry *entry; 552 struct vm_map *map; 553 struct proc *p; 554 vaddr_t end, start, len, stacklim; 555 int prot, grows; 556 557 start = (vaddr_t)SCARG(uap, start); 558 len = round_page(SCARG(uap, len)); 559 prot = SCARG(uap, prot); 560 grows = prot & (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP); 561 prot &= ~grows; 562 end = start + len; 563 564 if (start & PAGE_MASK) 565 return EINVAL; 566 if (end < start) 567 return EINVAL; 568 if (end == start) 569 return 0; 570 571 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) 572 return EINVAL; 573 if (grows == (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP)) 574 return EINVAL; 575 576 p = l->l_proc; 577 map = &p->p_vmspace->vm_map; 578 vm_map_lock(map); 579 # ifdef notdef 580 VM_MAP_RANGE_CHECK(map, start, end); 581 # endif 582 if (!uvm_map_lookup_entry(map, start, &entry) || entry->start > start) { 583 vm_map_unlock(map); 584 return ENOMEM; 585 } 586 587 /* 588 * Approximate the behaviour of PROT_GROWS{DOWN,UP}. 589 */ 590 591 stacklim = (vaddr_t)p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur; 592 if (grows & LINUX_PROT_GROWSDOWN) { 593 if (USRSTACK - stacklim <= start && start < USRSTACK) { 594 start = USRSTACK - stacklim; 595 } else { 596 start = entry->start; 597 } 598 } else if (grows & LINUX_PROT_GROWSUP) { 599 if (USRSTACK <= end && end < USRSTACK + stacklim) { 600 end = USRSTACK + stacklim; 601 } else { 602 end = entry->end; 603 } 604 } 605 vm_map_unlock(map); 606 return uvm_map_protect(map, start, end, prot, FALSE); 607 } 608 #endif /* USRSTACK */ 609 610 /* 611 * This code is partly stolen from src/lib/libc/compat-43/times.c 612 */ 613 614 #define CONVTCK(r) (r.tv_sec * hz + r.tv_usec / (1000000 / hz)) 615 616 int 617 linux_sys_times(struct lwp *l, const struct linux_sys_times_args *uap, register_t *retval) 618 { 619 /* { 620 syscallarg(struct times *) tms; 621 } */ 622 struct proc *p = l->l_proc; 623 struct timeval t; 624 int error; 625 626 if (SCARG(uap, tms)) { 627 struct linux_tms ltms; 628 struct rusage ru; 629 630 mutex_enter(p->p_lock); 631 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL, NULL); 632 ltms.ltms_utime = CONVTCK(ru.ru_utime); 633 ltms.ltms_stime = CONVTCK(ru.ru_stime); 634 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 635 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 636 mutex_exit(p->p_lock); 637 638 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 639 return error; 640 } 641 642 getmicrouptime(&t); 643 644 retval[0] = ((linux_clock_t)(CONVTCK(t))); 645 return 0; 646 } 647 648 #undef CONVTCK 649 650 /* 651 * Linux 'readdir' call. This code is mostly taken from the 652 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 653 * an attempt has been made to keep it a little cleaner (failing 654 * miserably, because of the cruft needed if count 1 is passed). 655 * 656 * The d_off field should contain the offset of the next valid entry, 657 * but in Linux it has the offset of the entry itself. We emulate 658 * that bug here. 659 * 660 * Read in BSD-style entries, convert them, and copy them out. 661 * 662 * Note that this doesn't handle union-mounted filesystems. 663 */ 664 int 665 linux_sys_getdents(struct lwp *l, const struct linux_sys_getdents_args *uap, register_t *retval) 666 { 667 /* { 668 syscallarg(int) fd; 669 syscallarg(struct linux_dirent *) dent; 670 syscallarg(unsigned int) count; 671 } */ 672 struct dirent *bdp; 673 struct vnode *vp; 674 char *inp, *tbuf; /* BSD-format */ 675 int len, reclen; /* BSD-format */ 676 char *outp; /* Linux-format */ 677 int resid, linux_reclen = 0; /* Linux-format */ 678 struct file *fp; 679 struct uio auio; 680 struct iovec aiov; 681 struct linux_dirent idb; 682 off_t off; /* true file offset */ 683 int buflen, error, eofflag, nbytes, oldcall; 684 struct vattr va; 685 off_t *cookiebuf = NULL, *cookie; 686 int ncookies; 687 688 /* fd_getvnode() will use the descriptor for us */ 689 if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0) 690 return (error); 691 692 if ((fp->f_flag & FREAD) == 0) { 693 error = EBADF; 694 goto out1; 695 } 696 697 vp = (struct vnode *)fp->f_data; 698 if (vp->v_type != VDIR) { 699 error = ENOTDIR; 700 goto out1; 701 } 702 703 vn_lock(vp, LK_SHARED | LK_RETRY); 704 error = VOP_GETATTR(vp, &va, l->l_cred); 705 VOP_UNLOCK(vp); 706 if (error) 707 goto out1; 708 709 nbytes = SCARG(uap, count); 710 if (nbytes == 1) { /* emulating old, broken behaviour */ 711 nbytes = sizeof (idb); 712 buflen = max(va.va_blocksize, nbytes); 713 oldcall = 1; 714 } else { 715 buflen = min(MAXBSIZE, nbytes); 716 if (buflen < va.va_blocksize) 717 buflen = va.va_blocksize; 718 oldcall = 0; 719 } 720 tbuf = malloc(buflen, M_TEMP, M_WAITOK); 721 722 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 723 off = fp->f_offset; 724 again: 725 aiov.iov_base = tbuf; 726 aiov.iov_len = buflen; 727 auio.uio_iov = &aiov; 728 auio.uio_iovcnt = 1; 729 auio.uio_rw = UIO_READ; 730 auio.uio_resid = buflen; 731 auio.uio_offset = off; 732 UIO_SETUP_SYSSPACE(&auio); 733 /* 734 * First we read into the malloc'ed buffer, then 735 * we massage it into user space, one record at a time. 736 */ 737 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 738 &ncookies); 739 if (error) 740 goto out; 741 742 inp = tbuf; 743 outp = (void *)SCARG(uap, dent); 744 resid = nbytes; 745 if ((len = buflen - auio.uio_resid) == 0) 746 goto eof; 747 748 for (cookie = cookiebuf; len > 0; len -= reclen) { 749 bdp = (struct dirent *)inp; 750 reclen = bdp->d_reclen; 751 if (reclen & 3) 752 panic("linux_readdir"); 753 if (bdp->d_fileno == 0) { 754 inp += reclen; /* it is a hole; squish it out */ 755 if (cookie) 756 off = *cookie++; 757 else 758 off += reclen; 759 continue; 760 } 761 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 762 if (reclen > len || resid < linux_reclen) { 763 /* entry too big for buffer, so just stop */ 764 outp++; 765 break; 766 } 767 /* 768 * Massage in place to make a Linux-shaped dirent (otherwise 769 * we have to worry about touching user memory outside of 770 * the copyout() call). 771 */ 772 idb.d_ino = bdp->d_fileno; 773 /* 774 * The old readdir() call misuses the offset and reclen fields. 775 */ 776 if (oldcall) { 777 idb.d_off = (linux_off_t)linux_reclen; 778 idb.d_reclen = (u_short)bdp->d_namlen; 779 } else { 780 if (sizeof (idb.d_off) <= 4 && (off >> 32) != 0) { 781 compat_offseterr(vp, "linux_getdents"); 782 error = EINVAL; 783 goto out; 784 } 785 idb.d_off = (linux_off_t)off; 786 idb.d_reclen = (u_short)linux_reclen; 787 } 788 strcpy(idb.d_name, bdp->d_name); 789 idb.d_name[strlen(idb.d_name) + 1] = bdp->d_type; 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 if (cookiebuf) 808 free(cookiebuf, M_TEMP); 809 cookiebuf = NULL; 810 goto again; 811 } 812 fp->f_offset = off; /* update the vnode offset */ 813 814 if (oldcall) 815 nbytes = resid + linux_reclen; 816 817 eof: 818 *retval = nbytes - resid; 819 out: 820 VOP_UNLOCK(vp); 821 if (cookiebuf) 822 free(cookiebuf, M_TEMP); 823 free(tbuf, M_TEMP); 824 out1: 825 fd_putfile(SCARG(uap, fd)); 826 return error; 827 } 828 829 /* 830 * Even when just using registers to pass arguments to syscalls you can 831 * have 5 of them on the i386. So this newer version of select() does 832 * this. 833 */ 834 int 835 linux_sys_select(struct lwp *l, const struct linux_sys_select_args *uap, register_t *retval) 836 { 837 /* { 838 syscallarg(int) nfds; 839 syscallarg(fd_set *) readfds; 840 syscallarg(fd_set *) writefds; 841 syscallarg(fd_set *) exceptfds; 842 syscallarg(struct timeval50 *) timeout; 843 } */ 844 845 return linux_select1(l, retval, SCARG(uap, nfds), SCARG(uap, readfds), 846 SCARG(uap, writefds), SCARG(uap, exceptfds), 847 (struct linux_timeval *)SCARG(uap, timeout)); 848 } 849 850 /* 851 * Common code for the old and new versions of select(). A couple of 852 * things are important: 853 * 1) return the amount of time left in the 'timeout' parameter 854 * 2) select never returns ERESTART on Linux, always return EINTR 855 */ 856 int 857 linux_select1(struct lwp *l, register_t *retval, int nfds, fd_set *readfds, 858 fd_set *writefds, fd_set *exceptfds, struct linux_timeval *timeout) 859 { 860 struct timespec ts0, ts1, uts, *ts = NULL; 861 struct linux_timeval ltv; 862 int error; 863 864 /* 865 * Store current time for computation of the amount of 866 * time left. 867 */ 868 if (timeout) { 869 if ((error = copyin(timeout, <v, sizeof(ltv)))) 870 return error; 871 uts.tv_sec = ltv.tv_sec; 872 uts.tv_nsec = ltv.tv_usec * 1000; 873 if (itimespecfix(&uts)) { 874 /* 875 * The timeval was invalid. Convert it to something 876 * valid that will act as it does under Linux. 877 */ 878 uts.tv_sec += uts.tv_nsec / 1000000000; 879 uts.tv_nsec %= 1000000000; 880 if (uts.tv_nsec < 0) { 881 uts.tv_sec -= 1; 882 uts.tv_nsec += 1000000000; 883 } 884 if (uts.tv_sec < 0) 885 timespecclear(&uts); 886 } 887 ts = &uts; 888 nanotime(&ts0); 889 } 890 891 error = selcommon(retval, nfds, readfds, writefds, exceptfds, ts, NULL); 892 893 if (error) { 894 /* 895 * See fs/select.c in the Linux kernel. Without this, 896 * Maelstrom doesn't work. 897 */ 898 if (error == ERESTART) 899 error = EINTR; 900 return error; 901 } 902 903 if (timeout) { 904 if (*retval) { 905 /* 906 * Compute how much time was left of the timeout, 907 * by subtracting the current time and the time 908 * before we started the call, and subtracting 909 * that result from the user-supplied value. 910 */ 911 nanotime(&ts1); 912 timespecsub(&ts1, &ts0, &ts1); 913 timespecsub(&uts, &ts1, &uts); 914 if (uts.tv_sec < 0) 915 timespecclear(&uts); 916 } else 917 timespecclear(&uts); 918 ltv.tv_sec = uts.tv_sec; 919 ltv.tv_usec = uts.tv_nsec / 1000; 920 if ((error = copyout(<v, timeout, sizeof(ltv)))) 921 return error; 922 } 923 924 return 0; 925 } 926 927 int 928 linux_sys_ppoll(struct lwp *l, 929 const struct linux_sys_ppoll_args *uap, register_t *retval) 930 { 931 /* { 932 syscallarg(struct pollfd *) fds; 933 syscallarg(int) nfds; 934 syscallarg(struct linux_timespec *) timeout; 935 syscallarg(linux_sigset_t *) sigset; 936 } */ 937 struct linux_timespec lts0, *lts; 938 struct timespec ts0, *ts = NULL; 939 linux_sigset_t lsigmask0, *lsigmask; 940 sigset_t sigmask0, *sigmask = NULL; 941 int error; 942 943 lts = SCARG(uap, timeout); 944 if (lts) { 945 if ((error = copyin(lts, <s0, sizeof(lts0))) != 0) 946 return error; 947 linux_to_native_timespec(&ts0, <s0); 948 ts = &ts0; 949 } 950 951 lsigmask = SCARG(uap, sigset); 952 if (lsigmask) { 953 if ((error = copyin(lsigmask, &lsigmask0, sizeof(lsigmask0)))) 954 return error; 955 linux_to_native_sigset(&sigmask0, &lsigmask0); 956 sigmask = &sigmask0; 957 } 958 959 return pollcommon(retval, SCARG(uap, fds), SCARG(uap, nfds), 960 ts, sigmask); 961 } 962 963 /* 964 * Set the 'personality' (emulation mode) for the current process. Only 965 * accept the Linux personality here (0). This call is needed because 966 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 967 * ELF binaries run in Linux mode, not SVR4 mode. 968 */ 969 int 970 linux_sys_personality(struct lwp *l, const struct linux_sys_personality_args *uap, register_t *retval) 971 { 972 /* { 973 syscallarg(unsigned long) per; 974 } */ 975 struct linux_emuldata *led; 976 int per; 977 978 per = SCARG(uap, per); 979 led = l->l_emuldata; 980 if (per == LINUX_PER_QUERY) { 981 retval[0] = led->led_personality; 982 return 0; 983 } 984 985 switch (per & LINUX_PER_MASK) { 986 case LINUX_PER_LINUX: 987 case LINUX_PER_LINUX32: 988 led->led_personality = per; 989 break; 990 991 default: 992 return EINVAL; 993 } 994 995 retval[0] = per; 996 return 0; 997 } 998 999 /* 1000 * We have nonexistent fsuid equal to uid. 1001 * If modification is requested, refuse. 1002 */ 1003 int 1004 linux_sys_setfsuid(struct lwp *l, const struct linux_sys_setfsuid_args *uap, register_t *retval) 1005 { 1006 /* { 1007 syscallarg(uid_t) uid; 1008 } */ 1009 uid_t uid; 1010 1011 uid = SCARG(uap, uid); 1012 if (kauth_cred_getuid(l->l_cred) != uid) 1013 return sys_nosys(l, uap, retval); 1014 1015 *retval = uid; 1016 return 0; 1017 } 1018 1019 int 1020 linux_sys_setfsgid(struct lwp *l, const struct linux_sys_setfsgid_args *uap, register_t *retval) 1021 { 1022 /* { 1023 syscallarg(gid_t) gid; 1024 } */ 1025 gid_t gid; 1026 1027 gid = SCARG(uap, gid); 1028 if (kauth_cred_getgid(l->l_cred) != gid) 1029 return sys_nosys(l, uap, retval); 1030 1031 *retval = gid; 1032 return 0; 1033 } 1034 1035 int 1036 linux_sys_setresuid(struct lwp *l, const struct linux_sys_setresuid_args *uap, register_t *retval) 1037 { 1038 /* { 1039 syscallarg(uid_t) ruid; 1040 syscallarg(uid_t) euid; 1041 syscallarg(uid_t) suid; 1042 } */ 1043 1044 /* 1045 * Note: These checks are a little different than the NetBSD 1046 * setreuid(2) call performs. This precisely follows the 1047 * behavior of the Linux kernel. 1048 */ 1049 1050 return do_setresuid(l, SCARG(uap, ruid), SCARG(uap, euid), 1051 SCARG(uap, suid), 1052 ID_R_EQ_R | ID_R_EQ_E | ID_R_EQ_S | 1053 ID_E_EQ_R | ID_E_EQ_E | ID_E_EQ_S | 1054 ID_S_EQ_R | ID_S_EQ_E | ID_S_EQ_S ); 1055 } 1056 1057 int 1058 linux_sys_getresuid(struct lwp *l, const struct linux_sys_getresuid_args *uap, register_t *retval) 1059 { 1060 /* { 1061 syscallarg(uid_t *) ruid; 1062 syscallarg(uid_t *) euid; 1063 syscallarg(uid_t *) suid; 1064 } */ 1065 kauth_cred_t pc = l->l_cred; 1066 int error; 1067 uid_t uid; 1068 1069 /* 1070 * Linux copies these values out to userspace like so: 1071 * 1072 * 1. Copy out ruid. 1073 * 2. If that succeeds, copy out euid. 1074 * 3. If both of those succeed, copy out suid. 1075 */ 1076 uid = kauth_cred_getuid(pc); 1077 if ((error = copyout(&uid, SCARG(uap, ruid), sizeof(uid_t))) != 0) 1078 return (error); 1079 1080 uid = kauth_cred_geteuid(pc); 1081 if ((error = copyout(&uid, SCARG(uap, euid), sizeof(uid_t))) != 0) 1082 return (error); 1083 1084 uid = kauth_cred_getsvuid(pc); 1085 1086 return (copyout(&uid, SCARG(uap, suid), sizeof(uid_t))); 1087 } 1088 1089 int 1090 linux_sys_ptrace(struct lwp *l, const struct linux_sys_ptrace_args *uap, register_t *retval) 1091 { 1092 /* { 1093 i386, m68k, powerpc: T=int 1094 alpha, amd64: T=long 1095 syscallarg(T) request; 1096 syscallarg(T) pid; 1097 syscallarg(T) addr; 1098 syscallarg(T) data; 1099 } */ 1100 const int *ptr; 1101 int request; 1102 int error; 1103 1104 ptr = linux_ptrace_request_map; 1105 request = SCARG(uap, request); 1106 while (*ptr != -1) 1107 if (*ptr++ == request) { 1108 struct sys_ptrace_args pta; 1109 1110 SCARG(&pta, req) = *ptr; 1111 SCARG(&pta, pid) = SCARG(uap, pid); 1112 SCARG(&pta, addr) = (void *)SCARG(uap, addr); 1113 SCARG(&pta, data) = SCARG(uap, data); 1114 1115 /* 1116 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1117 * to continue where the process left off previously. 1118 * The same thing is achieved by addr == (void *) 1 1119 * on NetBSD, so rewrite 'addr' appropriately. 1120 */ 1121 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1122 SCARG(&pta, addr) = (void *) 1; 1123 1124 error = sysent[SYS_ptrace].sy_call(l, &pta, retval); 1125 if (error) 1126 return error; 1127 switch (request) { 1128 case LINUX_PTRACE_PEEKTEXT: 1129 case LINUX_PTRACE_PEEKDATA: 1130 error = copyout (retval, 1131 (void *)SCARG(uap, data), 1132 sizeof *retval); 1133 *retval = SCARG(uap, data); 1134 break; 1135 default: 1136 break; 1137 } 1138 return error; 1139 } 1140 else 1141 ptr++; 1142 1143 return LINUX_SYS_PTRACE_ARCH(l, uap, retval); 1144 } 1145 1146 int 1147 linux_sys_reboot(struct lwp *l, const struct linux_sys_reboot_args *uap, register_t *retval) 1148 { 1149 /* { 1150 syscallarg(int) magic1; 1151 syscallarg(int) magic2; 1152 syscallarg(int) cmd; 1153 syscallarg(void *) arg; 1154 } */ 1155 struct sys_reboot_args /* { 1156 syscallarg(int) opt; 1157 syscallarg(char *) bootstr; 1158 } */ sra; 1159 int error; 1160 1161 if ((error = kauth_authorize_system(l->l_cred, 1162 KAUTH_SYSTEM_REBOOT, 0, NULL, NULL, NULL)) != 0) 1163 return(error); 1164 1165 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1166 return(EINVAL); 1167 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1168 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1169 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1170 return(EINVAL); 1171 1172 switch ((unsigned long)SCARG(uap, cmd)) { 1173 case LINUX_REBOOT_CMD_RESTART: 1174 SCARG(&sra, opt) = RB_AUTOBOOT; 1175 break; 1176 case LINUX_REBOOT_CMD_HALT: 1177 SCARG(&sra, opt) = RB_HALT; 1178 break; 1179 case LINUX_REBOOT_CMD_POWER_OFF: 1180 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1181 break; 1182 case LINUX_REBOOT_CMD_RESTART2: 1183 /* Reboot with an argument. */ 1184 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1185 SCARG(&sra, bootstr) = SCARG(uap, arg); 1186 break; 1187 case LINUX_REBOOT_CMD_CAD_ON: 1188 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1189 case LINUX_REBOOT_CMD_CAD_OFF: 1190 return(0); 1191 default: 1192 return(EINVAL); 1193 } 1194 1195 return(sys_reboot(l, &sra, retval)); 1196 } 1197 1198 /* 1199 * Copy of compat_12_sys_swapon(). 1200 */ 1201 int 1202 linux_sys_swapon(struct lwp *l, const struct linux_sys_swapon_args *uap, register_t *retval) 1203 { 1204 /* { 1205 syscallarg(const char *) name; 1206 } */ 1207 struct sys_swapctl_args ua; 1208 1209 SCARG(&ua, cmd) = SWAP_ON; 1210 SCARG(&ua, arg) = (void *)__UNCONST(SCARG(uap, name)); 1211 SCARG(&ua, misc) = 0; /* priority */ 1212 return (sys_swapctl(l, &ua, retval)); 1213 } 1214 1215 /* 1216 * Stop swapping to the file or block device specified by path. 1217 */ 1218 int 1219 linux_sys_swapoff(struct lwp *l, const struct linux_sys_swapoff_args *uap, register_t *retval) 1220 { 1221 /* { 1222 syscallarg(const char *) path; 1223 } */ 1224 struct sys_swapctl_args ua; 1225 1226 SCARG(&ua, cmd) = SWAP_OFF; 1227 SCARG(&ua, arg) = __UNCONST(SCARG(uap, path)); /*XXXUNCONST*/ 1228 return (sys_swapctl(l, &ua, retval)); 1229 } 1230 1231 /* 1232 * Copy of compat_09_sys_setdomainname() 1233 */ 1234 /* ARGSUSED */ 1235 int 1236 linux_sys_setdomainname(struct lwp *l, const struct linux_sys_setdomainname_args *uap, register_t *retval) 1237 { 1238 /* { 1239 syscallarg(char *) domainname; 1240 syscallarg(int) len; 1241 } */ 1242 int name[2]; 1243 1244 name[0] = CTL_KERN; 1245 name[1] = KERN_DOMAINNAME; 1246 return (old_sysctl(&name[0], 2, 0, 0, SCARG(uap, domainname), 1247 SCARG(uap, len), l)); 1248 } 1249 1250 /* 1251 * sysinfo() 1252 */ 1253 /* ARGSUSED */ 1254 int 1255 linux_sys_sysinfo(struct lwp *l, const struct linux_sys_sysinfo_args *uap, register_t *retval) 1256 { 1257 /* { 1258 syscallarg(struct linux_sysinfo *) arg; 1259 } */ 1260 struct linux_sysinfo si; 1261 struct loadavg *la; 1262 1263 si.uptime = time_uptime; 1264 la = &averunnable; 1265 si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1266 si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1267 si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1268 si.totalram = ctob((u_long)physmem); 1269 si.freeram = (u_long)uvmexp.free * uvmexp.pagesize; 1270 si.sharedram = 0; /* XXX */ 1271 si.bufferram = (u_long)uvmexp.filepages * uvmexp.pagesize; 1272 si.totalswap = (u_long)uvmexp.swpages * uvmexp.pagesize; 1273 si.freeswap = 1274 (u_long)(uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize; 1275 si.procs = nprocs; 1276 1277 /* The following are only present in newer Linux kernels. */ 1278 si.totalbig = 0; 1279 si.freebig = 0; 1280 si.mem_unit = 1; 1281 1282 return (copyout(&si, SCARG(uap, arg), sizeof si)); 1283 } 1284 1285 int 1286 linux_sys_getrlimit(struct lwp *l, const struct linux_sys_getrlimit_args *uap, register_t *retval) 1287 { 1288 /* { 1289 syscallarg(int) which; 1290 # ifdef LINUX_LARGEFILE64 1291 syscallarg(struct rlimit *) rlp; 1292 # else 1293 syscallarg(struct orlimit *) rlp; 1294 # endif 1295 } */ 1296 # ifdef LINUX_LARGEFILE64 1297 struct rlimit orl; 1298 # else 1299 struct orlimit orl; 1300 # endif 1301 int which; 1302 1303 which = linux_to_bsd_limit(SCARG(uap, which)); 1304 if (which < 0) 1305 return -which; 1306 1307 bsd_to_linux_rlimit(&orl, &l->l_proc->p_rlimit[which]); 1308 1309 return copyout(&orl, SCARG(uap, rlp), sizeof(orl)); 1310 } 1311 1312 int 1313 linux_sys_setrlimit(struct lwp *l, const struct linux_sys_setrlimit_args *uap, register_t *retval) 1314 { 1315 /* { 1316 syscallarg(int) which; 1317 # ifdef LINUX_LARGEFILE64 1318 syscallarg(struct rlimit *) rlp; 1319 # else 1320 syscallarg(struct orlimit *) rlp; 1321 # endif 1322 } */ 1323 struct rlimit rl; 1324 # ifdef LINUX_LARGEFILE64 1325 struct rlimit orl; 1326 # else 1327 struct orlimit orl; 1328 # endif 1329 int error; 1330 int which; 1331 1332 if ((error = copyin(SCARG(uap, rlp), &orl, sizeof(orl))) != 0) 1333 return error; 1334 1335 which = linux_to_bsd_limit(SCARG(uap, which)); 1336 if (which < 0) 1337 return -which; 1338 1339 linux_to_bsd_rlimit(&rl, &orl); 1340 return dosetrlimit(l, l->l_proc, which, &rl); 1341 } 1342 1343 # if !defined(__mips__) && !defined(__amd64__) 1344 /* XXX: this doesn't look 100% common, at least mips doesn't have it */ 1345 int 1346 linux_sys_ugetrlimit(struct lwp *l, const struct linux_sys_ugetrlimit_args *uap, register_t *retval) 1347 { 1348 return linux_sys_getrlimit(l, (const void *)uap, retval); 1349 } 1350 # endif 1351 1352 /* 1353 * This gets called for unsupported syscalls. The difference to sys_nosys() 1354 * is that process does not get SIGSYS, the call just returns with ENOSYS. 1355 * This is the way Linux does it and glibc depends on this behaviour. 1356 */ 1357 int 1358 linux_sys_nosys(struct lwp *l, const void *v, register_t *retval) 1359 { 1360 return (ENOSYS); 1361 } 1362 1363 int 1364 linux_sys_getpriority(struct lwp *l, const struct linux_sys_getpriority_args *uap, register_t *retval) 1365 { 1366 /* { 1367 syscallarg(int) which; 1368 syscallarg(int) who; 1369 } */ 1370 struct sys_getpriority_args bsa; 1371 int error; 1372 1373 SCARG(&bsa, which) = SCARG(uap, which); 1374 SCARG(&bsa, who) = SCARG(uap, who); 1375 1376 if ((error = sys_getpriority(l, &bsa, retval))) 1377 return error; 1378 1379 *retval = NZERO - *retval; 1380 1381 return 0; 1382 } 1383 1384 #ifndef __alpha__ 1385 int 1386 linux_sys_utimes(struct lwp *l, const struct linux_sys_utimes_args *uap, register_t *retval) 1387 { 1388 /* { 1389 syscallarg(const char *) path; 1390 syscallarg(const struct linux_timeval) *times; 1391 } */ 1392 struct linux_timeval ltv[2]; 1393 struct timeval tv[2]; 1394 struct timeval *tptr = NULL; 1395 int error; 1396 1397 if (SCARG(uap, times)) { 1398 if ((error = copyin(SCARG(uap, times), <v, sizeof(ltv)))) 1399 return error; 1400 1401 tv[0].tv_sec = ltv[0].tv_sec; 1402 tv[0].tv_usec = ltv[0].tv_usec; 1403 tv[1].tv_sec = ltv[1].tv_sec; 1404 tv[1].tv_usec = ltv[1].tv_usec; 1405 1406 tptr = tv; 1407 } 1408 1409 return do_sys_utimes(l, NULL, SCARG(uap, path), FOLLOW, 1410 tptr, UIO_SYSSPACE); 1411 } 1412 1413 int linux_sys_lutimes(struct lwp *, const struct linux_sys_utimes_args *, register_t *); 1414 int 1415 linux_sys_lutimes(struct lwp *l, const struct linux_sys_utimes_args *uap, register_t *retval) 1416 { 1417 /* { 1418 syscallarg(const char *) path; 1419 syscallarg(const struct linux_timeval) *times; 1420 } */ 1421 struct linux_timeval ltv[2]; 1422 struct timeval tv[2]; 1423 struct timeval *tptr = NULL; 1424 int error; 1425 1426 if (SCARG(uap, times)) { 1427 if ((error = copyin(SCARG(uap, times), <v, sizeof(ltv)))) 1428 return error; 1429 1430 tv[0].tv_sec = ltv[0].tv_sec; 1431 tv[0].tv_usec = ltv[0].tv_usec; 1432 tv[1].tv_sec = ltv[1].tv_sec; 1433 tv[1].tv_usec = ltv[1].tv_usec; 1434 1435 tptr = tv; 1436 } 1437 1438 return do_sys_utimes(l, NULL, SCARG(uap, path), NOFOLLOW, 1439 tptr, UIO_SYSSPACE); 1440 } 1441 #endif /* __alpha__ */ 1442 #endif /* !COMPAT_LINUX32 */ 1443