Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/common/linux_misc.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /* $NetBSD: linux_misc.c,v 1.201.6.1 2010/03/17 02:59:52 snj 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 1.201.6.1 2010/03/17 02:59:52 snj Exp $"); 61 62 #if defined(_KERNEL_OPT) 63 #include "opt_ptrace.h" 64 #endif 65 66 #include <sys/param.h> 67 #include <sys/systm.h> 68 #include <sys/namei.h> 69 #include <sys/proc.h> 70 #include <sys/dirent.h> 71 #include <sys/file.h> 72 #include <sys/stat.h> 73 #include <sys/filedesc.h> 74 #include <sys/ioctl.h> 75 #include <sys/kernel.h> 76 #include <sys/malloc.h> 77 #include <sys/mbuf.h> 78 #include <sys/mman.h> 79 #include <sys/mount.h> 80 #include <sys/prot.h> 81 #include <sys/reboot.h> 82 #include <sys/resource.h> 83 #include <sys/resourcevar.h> 84 #include <sys/select.h> 85 #include <sys/signal.h> 86 #include <sys/signalvar.h> 87 #include <sys/socket.h> 88 #include <sys/time.h> 89 #include <sys/times.h> 90 #include <sys/vnode.h> 91 #include <sys/uio.h> 92 #include <sys/wait.h> 93 #include <sys/utsname.h> 94 #include <sys/unistd.h> 95 #include <sys/vfs_syscalls.h> 96 #include <sys/swap.h> /* for SWAP_ON */ 97 #include <sys/sysctl.h> /* for KERN_DOMAINNAME */ 98 #include <sys/kauth.h> 99 100 #include <sys/ptrace.h> 101 #include <machine/ptrace.h> 102 103 #include <sys/syscall.h> 104 #include <sys/syscallargs.h> 105 106 #include <compat/linux/common/linux_machdep.h> 107 #include <compat/linux/common/linux_types.h> 108 #include <compat/linux/common/linux_signal.h> 109 #include <compat/linux/common/linux_ipc.h> 110 #include <compat/linux/common/linux_sem.h> 111 112 #include <compat/linux/linux_syscallargs.h> 113 114 #include <compat/linux/common/linux_fcntl.h> 115 #include <compat/linux/common/linux_mmap.h> 116 #include <compat/linux/common/linux_dirent.h> 117 #include <compat/linux/common/linux_util.h> 118 #include <compat/linux/common/linux_misc.h> 119 #ifndef COMPAT_LINUX32 120 #include <compat/linux/common/linux_statfs.h> 121 #include <compat/linux/common/linux_limit.h> 122 #endif 123 #include <compat/linux/common/linux_ptrace.h> 124 #include <compat/linux/common/linux_reboot.h> 125 #include <compat/linux/common/linux_emuldata.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_PORTAL, LINUX_DEFAULT_SUPER_MAGIC }, 153 { MOUNT_NULL, LINUX_DEFAULT_SUPER_MAGIC }, 154 { MOUNT_OVERLAY, LINUX_DEFAULT_SUPER_MAGIC }, 155 { MOUNT_UMAP, LINUX_DEFAULT_SUPER_MAGIC }, 156 { MOUNT_KERNFS, LINUX_DEFAULT_SUPER_MAGIC }, 157 { MOUNT_PROCFS, LINUX_PROC_SUPER_MAGIC }, 158 { MOUNT_AFS, LINUX_DEFAULT_SUPER_MAGIC }, 159 { MOUNT_CD9660, LINUX_ISOFS_SUPER_MAGIC }, 160 { MOUNT_UNION, LINUX_DEFAULT_SUPER_MAGIC }, 161 { MOUNT_ADOSFS, LINUX_ADFS_SUPER_MAGIC }, 162 { MOUNT_EXT2FS, LINUX_EXT2_SUPER_MAGIC }, 163 { MOUNT_CFS, LINUX_DEFAULT_SUPER_MAGIC }, 164 { MOUNT_CODA, LINUX_CODA_SUPER_MAGIC }, 165 { MOUNT_FILECORE, LINUX_DEFAULT_SUPER_MAGIC }, 166 { MOUNT_NTFS, LINUX_DEFAULT_SUPER_MAGIC }, 167 { MOUNT_SMBFS, LINUX_SMB_SUPER_MAGIC }, 168 { MOUNT_PTYFS, LINUX_DEVPTS_SUPER_MAGIC }, 169 { MOUNT_TMPFS, LINUX_TMPFS_SUPER_MAGIC } 170 }; 171 const int linux_fstypes_cnt = sizeof(linux_fstypes) / sizeof(linux_fstypes[0]); 172 173 # ifdef DEBUG_LINUX 174 #define DPRINTF(a) uprintf a 175 # else 176 #define DPRINTF(a) 177 # endif 178 179 /* Local linux_misc.c functions: */ 180 static void linux_to_bsd_mmap_args(struct sys_mmap_args *, 181 const struct linux_sys_mmap_args *); 182 static int linux_mmap(struct lwp *, const struct linux_sys_mmap_args *, 183 register_t *, off_t); 184 185 186 /* 187 * The information on a terminated (or stopped) process needs 188 * to be converted in order for Linux binaries to get a valid signal 189 * number out of it. 190 */ 191 int 192 bsd_to_linux_wstat(int st) 193 { 194 195 int sig; 196 197 if (WIFSIGNALED(st)) { 198 sig = WTERMSIG(st); 199 if (sig >= 0 && sig < NSIG) 200 st= (st & ~0177) | native_to_linux_signo[sig]; 201 } else if (WIFSTOPPED(st)) { 202 sig = WSTOPSIG(st); 203 if (sig >= 0 && sig < NSIG) 204 st = (st & ~0xff00) | 205 (native_to_linux_signo[sig] << 8); 206 } 207 return st; 208 } 209 210 /* 211 * wait4(2). Passed on to the NetBSD call, surrounded by code to 212 * reserve some space for a NetBSD-style wait status, and converting 213 * it to what Linux wants. 214 */ 215 int 216 linux_sys_wait4(struct lwp *l, const struct linux_sys_wait4_args *uap, register_t *retval) 217 { 218 /* { 219 syscallarg(int) pid; 220 syscallarg(int *) status; 221 syscallarg(int) options; 222 syscallarg(struct rusage *) rusage; 223 } */ 224 int error, status, options, linux_options, was_zombie; 225 struct rusage ru; 226 int pid = SCARG(uap, pid); 227 proc_t *p; 228 229 linux_options = SCARG(uap, options); 230 options = WOPTSCHECKED; 231 if (linux_options & ~(LINUX_WAIT4_KNOWNFLAGS)) 232 return (EINVAL); 233 234 if (linux_options & LINUX_WAIT4_WNOHANG) 235 options |= WNOHANG; 236 if (linux_options & LINUX_WAIT4_WUNTRACED) 237 options |= WUNTRACED; 238 if (linux_options & LINUX_WAIT4_WALL) 239 options |= WALLSIG; 240 if (linux_options & LINUX_WAIT4_WCLONE) 241 options |= WALTSIG; 242 # ifdef DIAGNOSTIC 243 if (linux_options & LINUX_WAIT4_WNOTHREAD) 244 printf("WARNING: %s: linux process %d.%d called " 245 "waitpid with __WNOTHREAD set!", 246 __FILE__, l->l_proc->p_pid, l->l_lid); 247 248 # endif 249 250 error = do_sys_wait(l, &pid, &status, options, 251 SCARG(uap, rusage) != NULL ? &ru : NULL, &was_zombie); 252 253 retval[0] = pid; 254 if (pid == 0) 255 return error; 256 257 p = curproc; 258 mutex_enter(p->p_lock); 259 sigdelset(&p->p_sigpend.sp_set, SIGCHLD); /* XXXAD ksiginfo leak */ 260 mutex_exit(p->p_lock); 261 262 if (SCARG(uap, rusage) != NULL) 263 error = copyout(&ru, SCARG(uap, rusage), sizeof(ru)); 264 265 if (error == 0 && SCARG(uap, status) != NULL) { 266 status = bsd_to_linux_wstat(status); 267 error = copyout(&status, SCARG(uap, status), sizeof status); 268 } 269 270 return error; 271 } 272 273 /* 274 * Linux brk(2). The check if the new address is >= the old one is 275 * done in the kernel in Linux. NetBSD does it in the library. 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 char *nbrk = SCARG(uap, nsize); 285 struct sys_obreak_args oba; 286 struct vmspace *vm = p->p_vmspace; 287 struct linux_emuldata *ed = (struct linux_emuldata*)p->p_emuldata; 288 289 SCARG(&oba, nsize) = nbrk; 290 291 if ((void *) nbrk > vm->vm_daddr && sys_obreak(l, &oba, retval) == 0) 292 ed->s->p_break = (char*)nbrk; 293 else 294 nbrk = ed->s->p_break; 295 296 retval[0] = (register_t)nbrk; 297 298 return 0; 299 } 300 301 /* 302 * Implement the fs stat functions. Straightforward. 303 */ 304 int 305 linux_sys_statfs(struct lwp *l, const struct linux_sys_statfs_args *uap, register_t *retval) 306 { 307 /* { 308 syscallarg(const char *) path; 309 syscallarg(struct linux_statfs *) sp; 310 } */ 311 struct statvfs *sb; 312 struct linux_statfs ltmp; 313 int error; 314 315 sb = STATVFSBUF_GET(); 316 error = do_sys_pstatvfs(l, SCARG(uap, path), ST_WAIT, sb); 317 if (error == 0) { 318 bsd_to_linux_statfs(sb, <mp); 319 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 320 } 321 STATVFSBUF_PUT(sb); 322 323 return error; 324 } 325 326 int 327 linux_sys_fstatfs(struct lwp *l, const struct linux_sys_fstatfs_args *uap, register_t *retval) 328 { 329 /* { 330 syscallarg(int) fd; 331 syscallarg(struct linux_statfs *) sp; 332 } */ 333 struct statvfs *sb; 334 struct linux_statfs ltmp; 335 int error; 336 337 sb = STATVFSBUF_GET(); 338 error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb); 339 if (error == 0) { 340 bsd_to_linux_statfs(sb, <mp); 341 error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); 342 } 343 STATVFSBUF_PUT(sb); 344 345 return error; 346 } 347 348 /* 349 * uname(). Just copy the info from the various strings stored in the 350 * kernel, and put it in the Linux utsname structure. That structure 351 * is almost the same as the NetBSD one, only it has fields 65 characters 352 * long, and an extra domainname field. 353 */ 354 int 355 linux_sys_uname(struct lwp *l, const struct linux_sys_uname_args *uap, register_t *retval) 356 { 357 /* { 358 syscallarg(struct linux_utsname *) up; 359 } */ 360 struct linux_utsname luts; 361 362 strlcpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 363 strlcpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 364 strlcpy(luts.l_release, linux_release, sizeof(luts.l_release)); 365 strlcpy(luts.l_version, linux_version, sizeof(luts.l_version)); 366 strlcpy(luts.l_machine, LINUX_UNAME_ARCH, sizeof(luts.l_machine)); 367 strlcpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 368 369 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 370 } 371 372 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 373 /* Used indirectly on: arm, i386, m68k */ 374 375 /* 376 * New type Linux mmap call. 377 * Only called directly on machines with >= 6 free regs. 378 */ 379 int 380 linux_sys_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval) 381 { 382 /* { 383 syscallarg(unsigned long) addr; 384 syscallarg(size_t) len; 385 syscallarg(int) prot; 386 syscallarg(int) flags; 387 syscallarg(int) fd; 388 syscallarg(linux_off_t) offset; 389 } */ 390 391 if (SCARG(uap, offset) & PAGE_MASK) 392 return EINVAL; 393 394 return linux_mmap(l, uap, retval, SCARG(uap, offset)); 395 } 396 397 /* 398 * Guts of most architectures' mmap64() implementations. This shares 399 * its list of arguments with linux_sys_mmap(). 400 * 401 * The difference in linux_sys_mmap2() is that "offset" is actually 402 * (offset / pagesize), not an absolute byte count. This translation 403 * to pagesize offsets is done inside glibc between the mmap64() call 404 * point, and the actual syscall. 405 */ 406 int 407 linux_sys_mmap2(struct lwp *l, const struct linux_sys_mmap2_args *uap, register_t *retval) 408 { 409 /* { 410 syscallarg(unsigned long) addr; 411 syscallarg(size_t) len; 412 syscallarg(int) prot; 413 syscallarg(int) flags; 414 syscallarg(int) fd; 415 syscallarg(linux_off_t) offset; 416 } */ 417 418 return linux_mmap(l, uap, retval, 419 ((off_t)SCARG(uap, offset)) << PAGE_SHIFT); 420 } 421 422 /* 423 * Massage arguments and call system mmap(2). 424 */ 425 static int 426 linux_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval, off_t offset) 427 { 428 struct sys_mmap_args cma; 429 int error; 430 size_t mmoff=0; 431 432 linux_to_bsd_mmap_args(&cma, uap); 433 SCARG(&cma, pos) = offset; 434 435 if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN) { 436 /* 437 * Request for stack-like memory segment. On linux, this 438 * works by mmap()ping (small) segment, which is automatically 439 * extended when page fault happens below the currently 440 * allocated area. We emulate this by allocating (typically 441 * bigger) segment sized at current stack size limit, and 442 * offsetting the requested and returned address accordingly. 443 * Since physical pages are only allocated on-demand, this 444 * is effectively identical. 445 */ 446 rlim_t ssl = l->l_proc->p_rlimit[RLIMIT_STACK].rlim_cur; 447 448 if (SCARG(&cma, len) < ssl) { 449 /* Compute the address offset */ 450 mmoff = round_page(ssl) - SCARG(uap, len); 451 452 if (SCARG(&cma, addr)) 453 SCARG(&cma, addr) = (char *)SCARG(&cma, addr) - mmoff; 454 455 SCARG(&cma, len) = (size_t) ssl; 456 } 457 } 458 459 error = sys_mmap(l, &cma, retval); 460 if (error) 461 return (error); 462 463 /* Shift the returned address for stack-like segment if necessary */ 464 retval[0] += mmoff; 465 466 return (0); 467 } 468 469 static void 470 linux_to_bsd_mmap_args(struct sys_mmap_args *cma, const struct linux_sys_mmap_args *uap) 471 { 472 int flags = MAP_TRYFIXED, fl = SCARG(uap, flags); 473 474 flags |= cvtto_bsd_mask(fl, LINUX_MAP_SHARED, MAP_SHARED); 475 flags |= cvtto_bsd_mask(fl, LINUX_MAP_PRIVATE, MAP_PRIVATE); 476 flags |= cvtto_bsd_mask(fl, LINUX_MAP_FIXED, MAP_FIXED); 477 flags |= cvtto_bsd_mask(fl, LINUX_MAP_ANON, MAP_ANON); 478 /* XXX XAX ERH: Any other flags here? There are more defined... */ 479 480 SCARG(cma, addr) = (void *)SCARG(uap, addr); 481 SCARG(cma, len) = SCARG(uap, len); 482 SCARG(cma, prot) = SCARG(uap, prot); 483 if (SCARG(cma, prot) & VM_PROT_WRITE) /* XXX */ 484 SCARG(cma, prot) |= VM_PROT_READ; 485 SCARG(cma, flags) = flags; 486 SCARG(cma, fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 487 SCARG(cma, pad) = 0; 488 } 489 490 #define LINUX_MREMAP_MAYMOVE 1 491 #define LINUX_MREMAP_FIXED 2 492 493 int 494 linux_sys_mremap(struct lwp *l, const struct linux_sys_mremap_args *uap, register_t *retval) 495 { 496 /* { 497 syscallarg(void *) old_address; 498 syscallarg(size_t) old_size; 499 syscallarg(size_t) new_size; 500 syscallarg(u_long) flags; 501 } */ 502 503 struct proc *p; 504 struct vm_map *map; 505 vaddr_t oldva; 506 vaddr_t newva; 507 size_t oldsize; 508 size_t newsize; 509 int flags; 510 int uvmflags; 511 int error; 512 513 flags = SCARG(uap, flags); 514 oldva = (vaddr_t)SCARG(uap, old_address); 515 oldsize = round_page(SCARG(uap, old_size)); 516 newsize = round_page(SCARG(uap, new_size)); 517 if ((flags & ~(LINUX_MREMAP_FIXED|LINUX_MREMAP_MAYMOVE)) != 0) { 518 error = EINVAL; 519 goto done; 520 } 521 if ((flags & LINUX_MREMAP_FIXED) != 0) { 522 if ((flags & LINUX_MREMAP_MAYMOVE) == 0) { 523 error = EINVAL; 524 goto done; 525 } 526 #if 0 /* notyet */ 527 newva = SCARG(uap, new_address); 528 uvmflags = MAP_FIXED; 529 #else /* notyet */ 530 error = EOPNOTSUPP; 531 goto done; 532 #endif /* notyet */ 533 } else if ((flags & LINUX_MREMAP_MAYMOVE) != 0) { 534 uvmflags = 0; 535 } else { 536 newva = oldva; 537 uvmflags = MAP_FIXED; 538 } 539 p = l->l_proc; 540 map = &p->p_vmspace->vm_map; 541 error = uvm_mremap(map, oldva, oldsize, map, &newva, newsize, p, 542 uvmflags); 543 544 done: 545 *retval = (error != 0) ? 0 : (register_t)newva; 546 return error; 547 } 548 549 int 550 linux_sys_mprotect(struct lwp *l, const struct linux_sys_mprotect_args *uap, register_t *retval) 551 { 552 /* { 553 syscallarg(const void *) start; 554 syscallarg(unsigned long) len; 555 syscallarg(int) prot; 556 } */ 557 struct vm_map_entry *entry; 558 struct vm_map *map; 559 struct proc *p; 560 vaddr_t end, start, len, stacklim; 561 int prot, grows; 562 563 start = (vaddr_t)SCARG(uap, start); 564 len = round_page(SCARG(uap, len)); 565 prot = SCARG(uap, prot); 566 grows = prot & (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP); 567 prot &= ~grows; 568 end = start + len; 569 570 if (start & PAGE_MASK) 571 return EINVAL; 572 if (end < start) 573 return EINVAL; 574 if (end == start) 575 return 0; 576 577 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) 578 return EINVAL; 579 if (grows == (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP)) 580 return EINVAL; 581 582 p = l->l_proc; 583 map = &p->p_vmspace->vm_map; 584 vm_map_lock(map); 585 # ifdef notdef 586 VM_MAP_RANGE_CHECK(map, start, end); 587 # endif 588 if (!uvm_map_lookup_entry(map, start, &entry) || entry->start > start) { 589 vm_map_unlock(map); 590 return ENOMEM; 591 } 592 593 /* 594 * Approximate the behaviour of PROT_GROWS{DOWN,UP}. 595 */ 596 597 stacklim = (vaddr_t)p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur; 598 if (grows & LINUX_PROT_GROWSDOWN) { 599 if (USRSTACK - stacklim <= start && start < USRSTACK) { 600 start = USRSTACK - stacklim; 601 } else { 602 start = entry->start; 603 } 604 } else if (grows & LINUX_PROT_GROWSUP) { 605 if (USRSTACK <= end && end < USRSTACK + stacklim) { 606 end = USRSTACK + stacklim; 607 } else { 608 end = entry->end; 609 } 610 } 611 vm_map_unlock(map); 612 return uvm_map_protect(map, start, end, prot, FALSE); 613 } 614 615 /* 616 * This code is partly stolen from src/lib/libc/compat-43/times.c 617 */ 618 619 #define CONVTCK(r) (r.tv_sec * hz + r.tv_usec / (1000000 / hz)) 620 621 int 622 linux_sys_times(struct lwp *l, const struct linux_sys_times_args *uap, register_t *retval) 623 { 624 /* { 625 syscallarg(struct times *) tms; 626 } */ 627 struct proc *p = l->l_proc; 628 struct timeval t; 629 int error; 630 631 if (SCARG(uap, tms)) { 632 struct linux_tms ltms; 633 struct rusage ru; 634 635 mutex_enter(p->p_lock); 636 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL, NULL); 637 ltms.ltms_utime = CONVTCK(ru.ru_utime); 638 ltms.ltms_stime = CONVTCK(ru.ru_stime); 639 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 640 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 641 mutex_exit(p->p_lock); 642 643 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 644 return error; 645 } 646 647 getmicrouptime(&t); 648 649 retval[0] = ((linux_clock_t)(CONVTCK(t))); 650 return 0; 651 } 652 653 #undef CONVTCK 654 655 /* 656 * Linux 'readdir' call. This code is mostly taken from the 657 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 658 * an attempt has been made to keep it a little cleaner (failing 659 * miserably, because of the cruft needed if count 1 is passed). 660 * 661 * The d_off field should contain the offset of the next valid entry, 662 * but in Linux it has the offset of the entry itself. We emulate 663 * that bug here. 664 * 665 * Read in BSD-style entries, convert them, and copy them out. 666 * 667 * Note that this doesn't handle union-mounted filesystems. 668 */ 669 int 670 linux_sys_getdents(struct lwp *l, const struct linux_sys_getdents_args *uap, register_t *retval) 671 { 672 /* { 673 syscallarg(int) fd; 674 syscallarg(struct linux_dirent *) dent; 675 syscallarg(unsigned int) count; 676 } */ 677 struct dirent *bdp; 678 struct vnode *vp; 679 char *inp, *tbuf; /* BSD-format */ 680 int len, reclen; /* BSD-format */ 681 char *outp; /* Linux-format */ 682 int resid, linux_reclen = 0; /* Linux-format */ 683 struct file *fp; 684 struct uio auio; 685 struct iovec aiov; 686 struct linux_dirent idb; 687 off_t off; /* true file offset */ 688 int buflen, error, eofflag, nbytes, oldcall; 689 struct vattr va; 690 off_t *cookiebuf = NULL, *cookie; 691 int ncookies; 692 693 /* fd_getvnode() will use the descriptor for us */ 694 if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0) 695 return (error); 696 697 if ((fp->f_flag & FREAD) == 0) { 698 error = EBADF; 699 goto out1; 700 } 701 702 vp = (struct vnode *)fp->f_data; 703 if (vp->v_type != VDIR) { 704 error = EINVAL; 705 goto out1; 706 } 707 708 if ((error = VOP_GETATTR(vp, &va, l->l_cred))) 709 goto out1; 710 711 nbytes = SCARG(uap, count); 712 if (nbytes == 1) { /* emulating old, broken behaviour */ 713 nbytes = sizeof (idb); 714 buflen = max(va.va_blocksize, nbytes); 715 oldcall = 1; 716 } else { 717 buflen = min(MAXBSIZE, nbytes); 718 if (buflen < va.va_blocksize) 719 buflen = va.va_blocksize; 720 oldcall = 0; 721 } 722 tbuf = malloc(buflen, M_TEMP, M_WAITOK); 723 724 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 725 off = fp->f_offset; 726 again: 727 aiov.iov_base = tbuf; 728 aiov.iov_len = buflen; 729 auio.uio_iov = &aiov; 730 auio.uio_iovcnt = 1; 731 auio.uio_rw = UIO_READ; 732 auio.uio_resid = buflen; 733 auio.uio_offset = off; 734 UIO_SETUP_SYSSPACE(&auio); 735 /* 736 * First we read into the malloc'ed buffer, then 737 * we massage it into user space, one record at a time. 738 */ 739 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 740 &ncookies); 741 if (error) 742 goto out; 743 744 inp = tbuf; 745 outp = (void *)SCARG(uap, dent); 746 resid = nbytes; 747 if ((len = buflen - auio.uio_resid) == 0) 748 goto eof; 749 750 for (cookie = cookiebuf; len > 0; len -= reclen) { 751 bdp = (struct dirent *)inp; 752 reclen = bdp->d_reclen; 753 if (reclen & 3) 754 panic("linux_readdir"); 755 if (bdp->d_fileno == 0) { 756 inp += reclen; /* it is a hole; squish it out */ 757 if (cookie) 758 off = *cookie++; 759 else 760 off += reclen; 761 continue; 762 } 763 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 764 if (reclen > len || resid < linux_reclen) { 765 /* entry too big for buffer, so just stop */ 766 outp++; 767 break; 768 } 769 /* 770 * Massage in place to make a Linux-shaped dirent (otherwise 771 * we have to worry about touching user memory outside of 772 * the copyout() call). 773 */ 774 idb.d_ino = bdp->d_fileno; 775 /* 776 * The old readdir() call misuses the offset and reclen fields. 777 */ 778 if (oldcall) { 779 idb.d_off = (linux_off_t)linux_reclen; 780 idb.d_reclen = (u_short)bdp->d_namlen; 781 } else { 782 if (sizeof (idb.d_off) <= 4 && (off >> 32) != 0) { 783 compat_offseterr(vp, "linux_getdents"); 784 error = EINVAL; 785 goto out; 786 } 787 idb.d_off = (linux_off_t)off; 788 idb.d_reclen = (u_short)linux_reclen; 789 } 790 strcpy(idb.d_name, bdp->d_name); 791 if ((error = copyout((void *)&idb, outp, linux_reclen))) 792 goto out; 793 /* advance past this real entry */ 794 inp += reclen; 795 if (cookie) 796 off = *cookie++; /* each entry points to itself */ 797 else 798 off += reclen; 799 /* advance output past Linux-shaped entry */ 800 outp += linux_reclen; 801 resid -= linux_reclen; 802 if (oldcall) 803 break; 804 } 805 806 /* if we squished out the whole block, try again */ 807 if (outp == (void *)SCARG(uap, dent)) { 808 if (cookiebuf) 809 free(cookiebuf, M_TEMP); 810 cookiebuf = NULL; 811 goto again; 812 } 813 fp->f_offset = off; /* update the vnode offset */ 814 815 if (oldcall) 816 nbytes = resid + linux_reclen; 817 818 eof: 819 *retval = nbytes - resid; 820 out: 821 VOP_UNLOCK(vp, 0); 822 if (cookiebuf) 823 free(cookiebuf, M_TEMP); 824 free(tbuf, M_TEMP); 825 out1: 826 fd_putfile(SCARG(uap, fd)); 827 return error; 828 } 829 830 /* 831 * Even when just using registers to pass arguments to syscalls you can 832 * have 5 of them on the i386. So this newer version of select() does 833 * this. 834 */ 835 int 836 linux_sys_select(struct lwp *l, const struct linux_sys_select_args *uap, register_t *retval) 837 { 838 /* { 839 syscallarg(int) nfds; 840 syscallarg(fd_set *) readfds; 841 syscallarg(fd_set *) writefds; 842 syscallarg(fd_set *) exceptfds; 843 syscallarg(struct timeval *) timeout; 844 } */ 845 846 return linux_select1(l, retval, SCARG(uap, nfds), SCARG(uap, readfds), 847 SCARG(uap, writefds), SCARG(uap, exceptfds), 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(l, retval, nfds, readfds, writefds, exceptfds, timeout) 858 struct lwp *l; 859 register_t *retval; 860 int nfds; 861 fd_set *readfds, *writefds, *exceptfds; 862 struct timeval *timeout; 863 { 864 struct timeval tv0, tv1, utv, *tv = NULL; 865 int error; 866 867 /* 868 * Store current time for computation of the amount of 869 * time left. 870 */ 871 if (timeout) { 872 if ((error = copyin(timeout, &utv, sizeof(utv)))) 873 return error; 874 if (itimerfix(&utv)) { 875 /* 876 * The timeval was invalid. Convert it to something 877 * valid that will act as it does under Linux. 878 */ 879 utv.tv_sec += utv.tv_usec / 1000000; 880 utv.tv_usec %= 1000000; 881 if (utv.tv_usec < 0) { 882 utv.tv_sec -= 1; 883 utv.tv_usec += 1000000; 884 } 885 if (utv.tv_sec < 0) 886 timerclear(&utv); 887 } 888 tv = &utv; 889 microtime(&tv0); 890 } 891 892 error = selcommon(l, retval, nfds, readfds, writefds, exceptfds, 893 tv, NULL); 894 895 if (error) { 896 /* 897 * See fs/select.c in the Linux kernel. Without this, 898 * Maelstrom doesn't work. 899 */ 900 if (error == ERESTART) 901 error = EINTR; 902 return error; 903 } 904 905 if (timeout) { 906 if (*retval) { 907 /* 908 * Compute how much time was left of the timeout, 909 * by subtracting the current time and the time 910 * before we started the call, and subtracting 911 * that result from the user-supplied value. 912 */ 913 microtime(&tv1); 914 timersub(&tv1, &tv0, &tv1); 915 timersub(&utv, &tv1, &utv); 916 if (utv.tv_sec < 0) 917 timerclear(&utv); 918 } else 919 timerclear(&utv); 920 if ((error = copyout(&utv, timeout, sizeof(utv)))) 921 return error; 922 } 923 924 return 0; 925 } 926 927 /* 928 * Set the 'personality' (emulation mode) for the current process. Only 929 * accept the Linux personality here (0). This call is needed because 930 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 931 * ELF binaries run in Linux mode, not SVR4 mode. 932 */ 933 int 934 linux_sys_personality(struct lwp *l, const struct linux_sys_personality_args *uap, register_t *retval) 935 { 936 /* { 937 syscallarg(int) per; 938 } */ 939 940 if (SCARG(uap, per) != 0) 941 return EINVAL; 942 retval[0] = 0; 943 return 0; 944 } 945 946 /* 947 * We have nonexistent fsuid equal to uid. 948 * If modification is requested, refuse. 949 */ 950 int 951 linux_sys_setfsuid(struct lwp *l, const struct linux_sys_setfsuid_args *uap, register_t *retval) 952 { 953 /* { 954 syscallarg(uid_t) uid; 955 } */ 956 uid_t uid; 957 958 uid = SCARG(uap, uid); 959 if (kauth_cred_getuid(l->l_cred) != uid) 960 return sys_nosys(l, uap, retval); 961 962 *retval = uid; 963 return 0; 964 } 965 966 int 967 linux_sys_setfsgid(struct lwp *l, const struct linux_sys_setfsgid_args *uap, register_t *retval) 968 { 969 /* { 970 syscallarg(gid_t) gid; 971 } */ 972 gid_t gid; 973 974 gid = SCARG(uap, gid); 975 if (kauth_cred_getgid(l->l_cred) != gid) 976 return sys_nosys(l, uap, retval); 977 978 *retval = gid; 979 return 0; 980 } 981 982 int 983 linux_sys_setresuid(struct lwp *l, const struct linux_sys_setresuid_args *uap, register_t *retval) 984 { 985 /* { 986 syscallarg(uid_t) ruid; 987 syscallarg(uid_t) euid; 988 syscallarg(uid_t) suid; 989 } */ 990 991 /* 992 * Note: These checks are a little different than the NetBSD 993 * setreuid(2) call performs. This precisely follows the 994 * behavior of the Linux kernel. 995 */ 996 997 return do_setresuid(l, SCARG(uap, ruid), SCARG(uap, euid), 998 SCARG(uap, suid), 999 ID_R_EQ_R | ID_R_EQ_E | ID_R_EQ_S | 1000 ID_E_EQ_R | ID_E_EQ_E | ID_E_EQ_S | 1001 ID_S_EQ_R | ID_S_EQ_E | ID_S_EQ_S ); 1002 } 1003 1004 int 1005 linux_sys_getresuid(struct lwp *l, const struct linux_sys_getresuid_args *uap, register_t *retval) 1006 { 1007 /* { 1008 syscallarg(uid_t *) ruid; 1009 syscallarg(uid_t *) euid; 1010 syscallarg(uid_t *) suid; 1011 } */ 1012 kauth_cred_t pc = l->l_cred; 1013 int error; 1014 uid_t uid; 1015 1016 /* 1017 * Linux copies these values out to userspace like so: 1018 * 1019 * 1. Copy out ruid. 1020 * 2. If that succeeds, copy out euid. 1021 * 3. If both of those succeed, copy out suid. 1022 */ 1023 uid = kauth_cred_getuid(pc); 1024 if ((error = copyout(&uid, SCARG(uap, ruid), sizeof(uid_t))) != 0) 1025 return (error); 1026 1027 uid = kauth_cred_geteuid(pc); 1028 if ((error = copyout(&uid, SCARG(uap, euid), sizeof(uid_t))) != 0) 1029 return (error); 1030 1031 uid = kauth_cred_getsvuid(pc); 1032 1033 return (copyout(&uid, SCARG(uap, suid), sizeof(uid_t))); 1034 } 1035 1036 int 1037 linux_sys_ptrace(struct lwp *l, const struct linux_sys_ptrace_args *uap, register_t *retval) 1038 { 1039 /* { 1040 i386, m68k, powerpc: T=int 1041 alpha, amd64: T=long 1042 syscallarg(T) request; 1043 syscallarg(T) pid; 1044 syscallarg(T) addr; 1045 syscallarg(T) data; 1046 } */ 1047 #if defined(PTRACE) || defined(_LKM) 1048 const int *ptr; 1049 int request; 1050 int error; 1051 #ifdef _LKM 1052 #define sys_ptrace (*sysent[SYS_ptrace].sy_call) 1053 #endif 1054 1055 ptr = linux_ptrace_request_map; 1056 request = SCARG(uap, request); 1057 while (*ptr != -1) 1058 if (*ptr++ == request) { 1059 struct sys_ptrace_args pta; 1060 1061 SCARG(&pta, req) = *ptr; 1062 SCARG(&pta, pid) = SCARG(uap, pid); 1063 SCARG(&pta, addr) = (void *)SCARG(uap, addr); 1064 SCARG(&pta, data) = SCARG(uap, data); 1065 1066 /* 1067 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1068 * to continue where the process left off previously. 1069 * The same thing is achieved by addr == (void *) 1 1070 * on NetBSD, so rewrite 'addr' appropriately. 1071 */ 1072 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1073 SCARG(&pta, addr) = (void *) 1; 1074 1075 error = sys_ptrace(l, &pta, retval); 1076 if (error) 1077 return error; 1078 switch (request) { 1079 case LINUX_PTRACE_PEEKTEXT: 1080 case LINUX_PTRACE_PEEKDATA: 1081 error = copyout (retval, 1082 (void *)SCARG(uap, data), 1083 sizeof *retval); 1084 *retval = SCARG(uap, data); 1085 break; 1086 default: 1087 break; 1088 } 1089 return error; 1090 } 1091 else 1092 ptr++; 1093 1094 return LINUX_SYS_PTRACE_ARCH(l, uap, retval); 1095 #else 1096 return ENOSYS; 1097 #endif /* PTRACE || _LKM */ 1098 } 1099 1100 int 1101 linux_sys_reboot(struct lwp *l, const struct linux_sys_reboot_args *uap, register_t *retval) 1102 { 1103 /* { 1104 syscallarg(int) magic1; 1105 syscallarg(int) magic2; 1106 syscallarg(int) cmd; 1107 syscallarg(void *) arg; 1108 } */ 1109 struct sys_reboot_args /* { 1110 syscallarg(int) opt; 1111 syscallarg(char *) bootstr; 1112 } */ sra; 1113 int error; 1114 1115 if ((error = kauth_authorize_system(l->l_cred, 1116 KAUTH_SYSTEM_REBOOT, 0, NULL, NULL, NULL)) != 0) 1117 return(error); 1118 1119 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1120 return(EINVAL); 1121 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1122 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1123 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1124 return(EINVAL); 1125 1126 switch ((unsigned long)SCARG(uap, cmd)) { 1127 case LINUX_REBOOT_CMD_RESTART: 1128 SCARG(&sra, opt) = RB_AUTOBOOT; 1129 break; 1130 case LINUX_REBOOT_CMD_HALT: 1131 SCARG(&sra, opt) = RB_HALT; 1132 break; 1133 case LINUX_REBOOT_CMD_POWER_OFF: 1134 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1135 break; 1136 case LINUX_REBOOT_CMD_RESTART2: 1137 /* Reboot with an argument. */ 1138 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1139 SCARG(&sra, bootstr) = SCARG(uap, arg); 1140 break; 1141 case LINUX_REBOOT_CMD_CAD_ON: 1142 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1143 case LINUX_REBOOT_CMD_CAD_OFF: 1144 return(0); 1145 default: 1146 return(EINVAL); 1147 } 1148 1149 return(sys_reboot(l, &sra, retval)); 1150 } 1151 1152 /* 1153 * Copy of compat_12_sys_swapon(). 1154 */ 1155 int 1156 linux_sys_swapon(struct lwp *l, const struct linux_sys_swapon_args *uap, register_t *retval) 1157 { 1158 /* { 1159 syscallarg(const char *) name; 1160 } */ 1161 struct sys_swapctl_args ua; 1162 1163 SCARG(&ua, cmd) = SWAP_ON; 1164 SCARG(&ua, arg) = (void *)__UNCONST(SCARG(uap, name)); 1165 SCARG(&ua, misc) = 0; /* priority */ 1166 return (sys_swapctl(l, &ua, retval)); 1167 } 1168 1169 /* 1170 * Stop swapping to the file or block device specified by path. 1171 */ 1172 int 1173 linux_sys_swapoff(struct lwp *l, const struct linux_sys_swapoff_args *uap, register_t *retval) 1174 { 1175 /* { 1176 syscallarg(const char *) path; 1177 } */ 1178 struct sys_swapctl_args ua; 1179 1180 SCARG(&ua, cmd) = SWAP_OFF; 1181 SCARG(&ua, arg) = __UNCONST(SCARG(uap, path)); /*XXXUNCONST*/ 1182 return (sys_swapctl(l, &ua, retval)); 1183 } 1184 1185 /* 1186 * Copy of compat_09_sys_setdomainname() 1187 */ 1188 /* ARGSUSED */ 1189 int 1190 linux_sys_setdomainname(struct lwp *l, const struct linux_sys_setdomainname_args *uap, register_t *retval) 1191 { 1192 /* { 1193 syscallarg(char *) domainname; 1194 syscallarg(int) len; 1195 } */ 1196 int name[2]; 1197 1198 name[0] = CTL_KERN; 1199 name[1] = KERN_DOMAINNAME; 1200 return (old_sysctl(&name[0], 2, 0, 0, SCARG(uap, domainname), 1201 SCARG(uap, len), l)); 1202 } 1203 1204 /* 1205 * sysinfo() 1206 */ 1207 /* ARGSUSED */ 1208 int 1209 linux_sys_sysinfo(struct lwp *l, const struct linux_sys_sysinfo_args *uap, register_t *retval) 1210 { 1211 /* { 1212 syscallarg(struct linux_sysinfo *) arg; 1213 } */ 1214 struct linux_sysinfo si; 1215 struct loadavg *la; 1216 1217 si.uptime = time_uptime; 1218 la = &averunnable; 1219 si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1220 si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1221 si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1222 si.totalram = ctob((u_long)physmem); 1223 si.freeram = (u_long)uvmexp.free * uvmexp.pagesize; 1224 si.sharedram = 0; /* XXX */ 1225 si.bufferram = (u_long)uvmexp.filepages * uvmexp.pagesize; 1226 si.totalswap = (u_long)uvmexp.swpages * uvmexp.pagesize; 1227 si.freeswap = 1228 (u_long)(uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize; 1229 si.procs = nprocs; 1230 1231 /* The following are only present in newer Linux kernels. */ 1232 si.totalbig = 0; 1233 si.freebig = 0; 1234 si.mem_unit = 1; 1235 1236 return (copyout(&si, SCARG(uap, arg), sizeof si)); 1237 } 1238 1239 int 1240 linux_sys_getrlimit(struct lwp *l, const struct linux_sys_getrlimit_args *uap, register_t *retval) 1241 { 1242 /* { 1243 syscallarg(int) which; 1244 # ifdef LINUX_LARGEFILE64 1245 syscallarg(struct rlimit *) rlp; 1246 # else 1247 syscallarg(struct orlimit *) rlp; 1248 # endif 1249 } */ 1250 # ifdef LINUX_LARGEFILE64 1251 struct rlimit orl; 1252 # else 1253 struct orlimit orl; 1254 # endif 1255 int which; 1256 1257 which = linux_to_bsd_limit(SCARG(uap, which)); 1258 if (which < 0) 1259 return -which; 1260 1261 bsd_to_linux_rlimit(&orl, &l->l_proc->p_rlimit[which]); 1262 1263 return copyout(&orl, SCARG(uap, rlp), sizeof(orl)); 1264 } 1265 1266 int 1267 linux_sys_setrlimit(struct lwp *l, const struct linux_sys_setrlimit_args *uap, register_t *retval) 1268 { 1269 /* { 1270 syscallarg(int) which; 1271 # ifdef LINUX_LARGEFILE64 1272 syscallarg(struct rlimit *) rlp; 1273 # else 1274 syscallarg(struct orlimit *) rlp; 1275 # endif 1276 } */ 1277 struct rlimit rl; 1278 # ifdef LINUX_LARGEFILE64 1279 struct rlimit orl; 1280 # else 1281 struct orlimit orl; 1282 # endif 1283 int error; 1284 int which; 1285 1286 if ((error = copyin(SCARG(uap, rlp), &orl, sizeof(orl))) != 0) 1287 return error; 1288 1289 which = linux_to_bsd_limit(SCARG(uap, which)); 1290 if (which < 0) 1291 return -which; 1292 1293 linux_to_bsd_rlimit(&rl, &orl); 1294 return dosetrlimit(l, l->l_proc, which, &rl); 1295 } 1296 1297 # if !defined(__mips__) && !defined(__amd64__) 1298 /* XXX: this doesn't look 100% common, at least mips doesn't have it */ 1299 int 1300 linux_sys_ugetrlimit(struct lwp *l, const struct linux_sys_ugetrlimit_args *uap, register_t *retval) 1301 { 1302 return linux_sys_getrlimit(l, (const void *)uap, retval); 1303 } 1304 # endif 1305 1306 /* 1307 * This gets called for unsupported syscalls. The difference to sys_nosys() 1308 * is that process does not get SIGSYS, the call just returns with ENOSYS. 1309 * This is the way Linux does it and glibc depends on this behaviour. 1310 */ 1311 int 1312 linux_sys_nosys(struct lwp *l, const void *v, register_t *retval) 1313 { 1314 return (ENOSYS); 1315 } 1316 1317 int 1318 linux_sys_getpriority(struct lwp *l, const struct linux_sys_getpriority_args *uap, register_t *retval) 1319 { 1320 /* { 1321 syscallarg(int) which; 1322 syscallarg(int) who; 1323 } */ 1324 struct sys_getpriority_args bsa; 1325 int error; 1326 1327 SCARG(&bsa, which) = SCARG(uap, which); 1328 SCARG(&bsa, who) = SCARG(uap, who); 1329 1330 if ((error = sys_getpriority(l, &bsa, retval))) 1331 return error; 1332 1333 *retval = NZERO - *retval; 1334 1335 return 0; 1336 } 1337 1338 #endif /* !COMPAT_LINUX32 */
Cache object: fe328cc35c3d8cc7cc2727b7178ba6ff
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]