1 /* $NetBSD: linux_misc.c,v 1.152 2006/03/17 06:01:14 erh Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998, 1999 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Linux compatibility module. Try to deal with various Linux system calls. 42 */ 43 44 /* 45 * These functions have been moved to multiarch to allow 46 * selection of which machines include them to be 47 * determined by the individual files.linux_<arch> files. 48 * 49 * Function in multiarch: 50 * linux_sys_break : linux_break.c 51 * linux_sys_alarm : linux_misc_notalpha.c 52 * linux_sys_getresgid : linux_misc_notalpha.c 53 * linux_sys_nice : linux_misc_notalpha.c 54 * linux_sys_readdir : linux_misc_notalpha.c 55 * linux_sys_setresgid : linux_misc_notalpha.c 56 * linux_sys_time : linux_misc_notalpha.c 57 * linux_sys_utime : linux_misc_notalpha.c 58 * linux_sys_waitpid : linux_misc_notalpha.c 59 * linux_sys_old_mmap : linux_oldmmap.c 60 * linux_sys_oldolduname : linux_oldolduname.c 61 * linux_sys_oldselect : linux_oldselect.c 62 * linux_sys_olduname : linux_olduname.c 63 * linux_sys_pipe : linux_pipe.c 64 */ 65 66 #include <sys/cdefs.h> 67 __KERNEL_RCSID(0, "$NetBSD: linux_misc.c,v 1.152 2006/03/17 06:01:14 erh Exp $"); 68 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/namei.h> 72 #include <sys/proc.h> 73 #include <sys/dirent.h> 74 #include <sys/file.h> 75 #include <sys/stat.h> 76 #include <sys/filedesc.h> 77 #include <sys/ioctl.h> 78 #include <sys/kernel.h> 79 #include <sys/malloc.h> 80 #include <sys/mbuf.h> 81 #include <sys/mman.h> 82 #include <sys/mount.h> 83 #include <sys/reboot.h> 84 #include <sys/resource.h> 85 #include <sys/resourcevar.h> 86 #include <sys/signal.h> 87 #include <sys/signalvar.h> 88 #include <sys/socket.h> 89 #include <sys/time.h> 90 #include <sys/times.h> 91 #include <sys/vnode.h> 92 #include <sys/uio.h> 93 #include <sys/wait.h> 94 #include <sys/utsname.h> 95 #include <sys/unistd.h> 96 #include <sys/swap.h> /* for SWAP_ON */ 97 #include <sys/sysctl.h> /* for KERN_DOMAINNAME */ 98 99 #include <sys/ptrace.h> 100 #include <machine/ptrace.h> 101 102 #include <sys/sa.h> 103 #include <sys/syscallargs.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> 108 109 #include <compat/linux/linux_syscallargs.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_limit.h> 118 #endif 119 #include <compat/linux/common/linux_ptrace.h> 120 #include <compat/linux/common/linux_reboot.h> 121 #include <compat/linux/common/linux_emuldata.h> 122 123 #ifndef COMPAT_LINUX32 124 const int linux_ptrace_request_map[] = { 125 LINUX_PTRACE_TRACEME, PT_TRACE_ME, 126 LINUX_PTRACE_PEEKTEXT, PT_READ_I, 127 LINUX_PTRACE_PEEKDATA, PT_READ_D, 128 LINUX_PTRACE_POKETEXT, PT_WRITE_I, 129 LINUX_PTRACE_POKEDATA, PT_WRITE_D, 130 LINUX_PTRACE_CONT, PT_CONTINUE, 131 LINUX_PTRACE_KILL, PT_KILL, 132 LINUX_PTRACE_ATTACH, PT_ATTACH, 133 LINUX_PTRACE_DETACH, PT_DETACH, 134 # ifdef PT_STEP 135 LINUX_PTRACE_SINGLESTEP, PT_STEP, 136 # endif 137 -1 138 }; 139 140 const struct linux_mnttypes linux_fstypes[] = { 141 { MOUNT_FFS, LINUX_DEFAULT_SUPER_MAGIC }, 142 { MOUNT_NFS, LINUX_NFS_SUPER_MAGIC }, 143 { MOUNT_MFS, LINUX_DEFAULT_SUPER_MAGIC }, 144 { MOUNT_MSDOS, LINUX_MSDOS_SUPER_MAGIC }, 145 { MOUNT_LFS, LINUX_DEFAULT_SUPER_MAGIC }, 146 { MOUNT_FDESC, LINUX_DEFAULT_SUPER_MAGIC }, 147 { MOUNT_PORTAL, LINUX_DEFAULT_SUPER_MAGIC }, 148 { MOUNT_NULL, LINUX_DEFAULT_SUPER_MAGIC }, 149 { MOUNT_OVERLAY, LINUX_DEFAULT_SUPER_MAGIC }, 150 { MOUNT_UMAP, LINUX_DEFAULT_SUPER_MAGIC }, 151 { MOUNT_KERNFS, LINUX_DEFAULT_SUPER_MAGIC }, 152 { MOUNT_PROCFS, LINUX_PROC_SUPER_MAGIC }, 153 { MOUNT_AFS, LINUX_DEFAULT_SUPER_MAGIC }, 154 { MOUNT_CD9660, LINUX_ISOFS_SUPER_MAGIC }, 155 { MOUNT_UNION, LINUX_DEFAULT_SUPER_MAGIC }, 156 { MOUNT_ADOSFS, LINUX_ADFS_SUPER_MAGIC }, 157 { MOUNT_EXT2FS, LINUX_EXT2_SUPER_MAGIC }, 158 { MOUNT_CFS, LINUX_DEFAULT_SUPER_MAGIC }, 159 { MOUNT_CODA, LINUX_CODA_SUPER_MAGIC }, 160 { MOUNT_FILECORE, LINUX_DEFAULT_SUPER_MAGIC }, 161 { MOUNT_NTFS, LINUX_DEFAULT_SUPER_MAGIC }, 162 { MOUNT_SMBFS, LINUX_SMB_SUPER_MAGIC }, 163 { MOUNT_PTYFS, LINUX_DEVPTS_SUPER_MAGIC }, 164 { MOUNT_TMPFS, LINUX_DEFAULT_SUPER_MAGIC } 165 }; 166 const int linux_fstypes_cnt = sizeof(linux_fstypes) / sizeof(linux_fstypes[0]); 167 168 # ifdef DEBUG_LINUX 169 #define DPRINTF(a) uprintf a 170 # else 171 #define DPRINTF(a) 172 # endif 173 174 /* Local linux_misc.c functions: */ 175 # ifndef __amd64__ 176 static void bsd_to_linux_statfs __P((const struct statvfs *, 177 struct linux_statfs *)); 178 # endif 179 static void linux_to_bsd_mmap_args __P((struct sys_mmap_args *, 180 const struct linux_sys_mmap_args *)); 181 static int linux_mmap __P((struct lwp *, 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 void 191 bsd_to_linux_wstat(st) 192 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 } 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(l, v, retval) 216 struct lwp *l; 217 void *v; 218 register_t *retval; 219 { 220 struct linux_sys_wait4_args /* { 221 syscallarg(int) pid; 222 syscallarg(int *) status; 223 syscallarg(int) options; 224 syscallarg(struct rusage *) rusage; 225 } */ *uap = v; 226 struct proc *p = l->l_proc; 227 struct sys_wait4_args w4a; 228 int error, *status, tstat, options, linux_options; 229 caddr_t sg; 230 231 if (SCARG(uap, status) != NULL) { 232 sg = stackgap_init(p, 0); 233 status = (int *) stackgap_alloc(p, &sg, sizeof *status); 234 } else 235 status = NULL; 236 237 linux_options = SCARG(uap, options); 238 options = 0; 239 if (linux_options & ~(LINUX_WAIT4_KNOWNFLAGS)) 240 return (EINVAL); 241 242 if (linux_options & LINUX_WAIT4_WNOHANG) 243 options |= WNOHANG; 244 if (linux_options & LINUX_WAIT4_WUNTRACED) 245 options |= WUNTRACED; 246 if (linux_options & LINUX_WAIT4_WALL) 247 options |= WALLSIG; 248 if (linux_options & LINUX_WAIT4_WCLONE) 249 options |= WALTSIG; 250 # ifdef DIAGNOSTIC 251 if (linux_options & LINUX_WAIT4_WNOTHREAD) 252 printf("WARNING: %s: linux process %d.%d called " 253 "waitpid with __WNOTHREAD set!", 254 __FILE__, p->p_pid, l->l_lid); 255 256 # endif 257 258 SCARG(&w4a, pid) = SCARG(uap, pid); 259 SCARG(&w4a, status) = status; 260 SCARG(&w4a, options) = options; 261 SCARG(&w4a, rusage) = SCARG(uap, rusage); 262 263 if ((error = sys_wait4(l, &w4a, retval))) 264 return error; 265 266 sigdelset(&p->p_sigctx.ps_siglist, SIGCHLD); 267 268 if (status != NULL) { 269 if ((error = copyin(status, &tstat, sizeof tstat))) 270 return error; 271 272 bsd_to_linux_wstat(&tstat); 273 return copyout(&tstat, SCARG(uap, status), sizeof tstat); 274 } 275 276 return 0; 277 } 278 279 /* 280 * Linux brk(2). The check if the new address is >= the old one is 281 * done in the kernel in Linux. NetBSD does it in the library. 282 */ 283 int 284 linux_sys_brk(l, v, retval) 285 struct lwp *l; 286 void *v; 287 register_t *retval; 288 { 289 struct linux_sys_brk_args /* { 290 syscallarg(char *) nsize; 291 } */ *uap = v; 292 struct proc *p = l->l_proc; 293 char *nbrk = SCARG(uap, nsize); 294 struct sys_obreak_args oba; 295 struct vmspace *vm = p->p_vmspace; 296 struct linux_emuldata *ed = (struct linux_emuldata*)p->p_emuldata; 297 298 SCARG(&oba, nsize) = nbrk; 299 300 if ((caddr_t) nbrk > vm->vm_daddr && sys_obreak(l, &oba, retval) == 0) 301 ed->s->p_break = (char*)nbrk; 302 else 303 nbrk = ed->s->p_break; 304 305 retval[0] = (register_t)nbrk; 306 307 return 0; 308 } 309 310 # ifndef __amd64__ 311 /* 312 * Convert NetBSD statvfs structure to Linux statfs structure. 313 * Linux doesn't have f_flag, and we can't set f_frsize due 314 * to glibc statvfs() bug (see below). 315 */ 316 static void 317 bsd_to_linux_statfs(bsp, lsp) 318 const struct statvfs *bsp; 319 struct linux_statfs *lsp; 320 { 321 int i; 322 323 for (i = 0; i < linux_fstypes_cnt; i++) { 324 if (strcmp(bsp->f_fstypename, linux_fstypes[i].bsd) == 0) { 325 lsp->l_ftype = linux_fstypes[i].linux; 326 break; 327 } 328 } 329 330 if (i == linux_fstypes_cnt) { 331 DPRINTF(("unhandled fstype in linux emulation: %s\n", 332 bsp->f_fstypename)); 333 lsp->l_ftype = LINUX_DEFAULT_SUPER_MAGIC; 334 } 335 336 /* 337 * The sizes are expressed in number of blocks. The block 338 * size used for the size is f_frsize for POSIX-compliant 339 * statvfs. Linux statfs uses f_bsize as the block size 340 * (f_frsize used to not be available in Linux struct statfs). 341 * However, glibc 2.3.3 statvfs() wrapper fails to adjust the block 342 * counts for different f_frsize if f_frsize is provided by the kernel. 343 * POSIX conforming apps thus get wrong size if f_frsize 344 * is different to f_bsize. Thus, we just pretend we don't 345 * support f_frsize. 346 */ 347 348 lsp->l_fbsize = bsp->f_frsize; 349 lsp->l_ffrsize = 0; /* compat */ 350 lsp->l_fblocks = bsp->f_blocks; 351 lsp->l_fbfree = bsp->f_bfree; 352 lsp->l_fbavail = bsp->f_bavail; 353 lsp->l_ffiles = bsp->f_files; 354 lsp->l_fffree = bsp->f_ffree; 355 /* Linux sets the fsid to 0..., we don't */ 356 lsp->l_ffsid.val[0] = bsp->f_fsidx.__fsid_val[0]; 357 lsp->l_ffsid.val[1] = bsp->f_fsidx.__fsid_val[1]; 358 lsp->l_fnamelen = bsp->f_namemax; 359 (void)memset(lsp->l_fspare, 0, sizeof(lsp->l_fspare)); 360 } 361 362 /* 363 * Implement the fs stat functions. Straightforward. 364 */ 365 int 366 linux_sys_statfs(l, v, retval) 367 struct lwp *l; 368 void *v; 369 register_t *retval; 370 { 371 struct linux_sys_statfs_args /* { 372 syscallarg(const char *) path; 373 syscallarg(struct linux_statfs *) sp; 374 } */ *uap = v; 375 struct proc *p = l->l_proc; 376 struct statvfs btmp, *bsp; 377 struct linux_statfs ltmp; 378 struct sys_statvfs1_args bsa; 379 caddr_t sg; 380 int error; 381 382 sg = stackgap_init(p, 0); 383 bsp = (struct statvfs *) stackgap_alloc(p, &sg, sizeof (struct statvfs)); 384 385 CHECK_ALT_EXIST(l, &sg, SCARG(uap, path)); 386 387 SCARG(&bsa, path) = SCARG(uap, path); 388 SCARG(&bsa, buf) = bsp; 389 SCARG(&bsa, flags) = ST_WAIT; 390 391 if ((error = sys_statvfs1(l, &bsa, retval))) 392 return error; 393 394 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 395 return error; 396 397 bsd_to_linux_statfs(&btmp, <mp); 398 399 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 400 } 401 402 int 403 linux_sys_fstatfs(l, v, retval) 404 struct lwp *l; 405 void *v; 406 register_t *retval; 407 { 408 struct linux_sys_fstatfs_args /* { 409 syscallarg(int) fd; 410 syscallarg(struct linux_statfs *) sp; 411 } */ *uap = v; 412 struct proc *p = l->l_proc; 413 struct statvfs btmp, *bsp; 414 struct linux_statfs ltmp; 415 struct sys_fstatvfs1_args bsa; 416 caddr_t sg; 417 int error; 418 419 sg = stackgap_init(p, 0); 420 bsp = (struct statvfs *) stackgap_alloc(p, &sg, sizeof (struct statvfs)); 421 422 SCARG(&bsa, fd) = SCARG(uap, fd); 423 SCARG(&bsa, buf) = bsp; 424 SCARG(&bsa, flags) = ST_WAIT; 425 426 if ((error = sys_fstatvfs1(l, &bsa, retval))) 427 return error; 428 429 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 430 return error; 431 432 bsd_to_linux_statfs(&btmp, <mp); 433 434 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 435 } 436 # endif /* !__amd64__ */ 437 438 /* 439 * uname(). Just copy the info from the various strings stored in the 440 * kernel, and put it in the Linux utsname structure. That structure 441 * is almost the same as the NetBSD one, only it has fields 65 characters 442 * long, and an extra domainname field. 443 */ 444 int 445 linux_sys_uname(l, v, retval) 446 struct lwp *l; 447 void *v; 448 register_t *retval; 449 { 450 struct linux_sys_uname_args /* { 451 syscallarg(struct linux_utsname *) up; 452 } */ *uap = v; 453 struct linux_utsname luts; 454 455 strncpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 456 strncpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 457 strncpy(luts.l_release, linux_release, sizeof(luts.l_release)); 458 strncpy(luts.l_version, linux_version, sizeof(luts.l_version)); 459 # ifdef LINUX_UNAME_ARCH 460 strncpy(luts.l_machine, LINUX_UNAME_ARCH, sizeof(luts.l_machine)); 461 # else 462 strncpy(luts.l_machine, machine, sizeof(luts.l_machine)); 463 # endif 464 strncpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 465 466 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 467 } 468 469 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 470 /* Used indirectly on: arm, i386, m68k */ 471 472 /* 473 * New type Linux mmap call. 474 * Only called directly on machines with >= 6 free regs. 475 */ 476 int 477 linux_sys_mmap(l, v, retval) 478 struct lwp *l; 479 void *v; 480 register_t *retval; 481 { 482 struct linux_sys_mmap_args /* { 483 syscallarg(unsigned long) addr; 484 syscallarg(size_t) len; 485 syscallarg(int) prot; 486 syscallarg(int) flags; 487 syscallarg(int) fd; 488 syscallarg(linux_off_t) offset; 489 } */ *uap = v; 490 491 if (SCARG(uap, offset) & PAGE_MASK) 492 return EINVAL; 493 494 return linux_mmap(l, uap, retval, SCARG(uap, offset)); 495 } 496 497 /* 498 * Guts of most architectures' mmap64() implementations. This shares 499 * its list of arguments with linux_sys_mmap(). 500 * 501 * The difference in linux_sys_mmap2() is that "offset" is actually 502 * (offset / pagesize), not an absolute byte count. This translation 503 * to pagesize offsets is done inside glibc between the mmap64() call 504 * point, and the actual syscall. 505 */ 506 int 507 linux_sys_mmap2(l, v, retval) 508 struct lwp *l; 509 void *v; 510 register_t *retval; 511 { 512 struct linux_sys_mmap2_args /* { 513 syscallarg(unsigned long) addr; 514 syscallarg(size_t) len; 515 syscallarg(int) prot; 516 syscallarg(int) flags; 517 syscallarg(int) fd; 518 syscallarg(linux_off_t) offset; 519 } */ *uap = v; 520 521 return linux_mmap(l, uap, retval, 522 ((off_t)SCARG(uap, offset)) << PAGE_SHIFT); 523 } 524 525 /* 526 * Massage arguments and call system mmap(2). 527 */ 528 static int 529 linux_mmap(l, uap, retval, offset) 530 struct lwp *l; 531 struct linux_sys_mmap_args *uap; 532 register_t *retval; 533 off_t offset; 534 { 535 struct sys_mmap_args cma; 536 int error; 537 size_t mmoff=0; 538 539 if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN) { 540 /* 541 * Request for stack-like memory segment. On linux, this 542 * works by mmap()ping (small) segment, which is automatically 543 * extended when page fault happens below the currently 544 * allocated area. We emulate this by allocating (typically 545 * bigger) segment sized at current stack size limit, and 546 * offsetting the requested and returned address accordingly. 547 * Since physical pages are only allocated on-demand, this 548 * is effectively identical. 549 */ 550 rlim_t ssl = l->l_proc->p_rlimit[RLIMIT_STACK].rlim_cur; 551 552 if (SCARG(uap, len) < ssl) { 553 /* Compute the address offset */ 554 mmoff = round_page(ssl) - SCARG(uap, len); 555 556 if (SCARG(uap, addr)) 557 SCARG(uap, addr) -= mmoff; 558 559 SCARG(uap, len) = (size_t) ssl; 560 } 561 } 562 563 linux_to_bsd_mmap_args(&cma, uap); 564 SCARG(&cma, pos) = offset; 565 566 error = sys_mmap(l, &cma, retval); 567 if (error) 568 return (error); 569 570 /* Shift the returned address for stack-like segment if necessary */ 571 if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN && mmoff) 572 retval[0] += mmoff; 573 574 return (0); 575 } 576 577 static void 578 linux_to_bsd_mmap_args(cma, uap) 579 struct sys_mmap_args *cma; 580 const struct linux_sys_mmap_args *uap; 581 { 582 int flags = MAP_TRYFIXED, fl = SCARG(uap, flags); 583 584 flags |= cvtto_bsd_mask(fl, LINUX_MAP_SHARED, MAP_SHARED); 585 flags |= cvtto_bsd_mask(fl, LINUX_MAP_PRIVATE, MAP_PRIVATE); 586 flags |= cvtto_bsd_mask(fl, LINUX_MAP_FIXED, MAP_FIXED); 587 flags |= cvtto_bsd_mask(fl, LINUX_MAP_ANON, MAP_ANON); 588 /* XXX XAX ERH: Any other flags here? There are more defined... */ 589 590 SCARG(cma, addr) = (void *)SCARG(uap, addr); 591 SCARG(cma, len) = SCARG(uap, len); 592 SCARG(cma, prot) = SCARG(uap, prot); 593 if (SCARG(cma, prot) & VM_PROT_WRITE) /* XXX */ 594 SCARG(cma, prot) |= VM_PROT_READ; 595 SCARG(cma, flags) = flags; 596 SCARG(cma, fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 597 SCARG(cma, pad) = 0; 598 } 599 600 #define LINUX_MREMAP_MAYMOVE 1 601 #define LINUX_MREMAP_FIXED 2 602 603 int 604 linux_sys_mremap(l, v, retval) 605 struct lwp *l; 606 void *v; 607 register_t *retval; 608 { 609 struct linux_sys_mremap_args /* { 610 syscallarg(void *) old_address; 611 syscallarg(size_t) old_size; 612 syscallarg(size_t) new_size; 613 syscallarg(u_long) flags; 614 } */ *uap = v; 615 616 struct proc *p; 617 struct vm_map *map; 618 vaddr_t oldva; 619 vaddr_t newva; 620 size_t oldsize; 621 size_t newsize; 622 int flags; 623 int uvmflags; 624 int error; 625 626 flags = SCARG(uap, flags); 627 oldva = (vaddr_t)SCARG(uap, old_address); 628 oldsize = round_page(SCARG(uap, old_size)); 629 newsize = round_page(SCARG(uap, new_size)); 630 if ((flags & ~(LINUX_MREMAP_FIXED|LINUX_MREMAP_MAYMOVE)) != 0) { 631 error = EINVAL; 632 goto done; 633 } 634 if ((flags & LINUX_MREMAP_FIXED) != 0) { 635 if ((flags & LINUX_MREMAP_MAYMOVE) == 0) { 636 error = EINVAL; 637 goto done; 638 } 639 #if 0 /* notyet */ 640 newva = SCARG(uap, new_address); 641 uvmflags = UVM_MREMAP_FIXED; 642 #else /* notyet */ 643 error = EOPNOTSUPP; 644 goto done; 645 #endif /* notyet */ 646 } else if ((flags & LINUX_MREMAP_MAYMOVE) != 0) { 647 uvmflags = 0; 648 } else { 649 newva = oldva; 650 uvmflags = UVM_MREMAP_FIXED; 651 } 652 p = l->l_proc; 653 map = &p->p_vmspace->vm_map; 654 error = uvm_mremap(map, oldva, oldsize, map, &newva, newsize, p, 655 uvmflags); 656 657 done: 658 *retval = (error != 0) ? 0 : (register_t)newva; 659 return error; 660 } 661 662 int 663 linux_sys_msync(l, v, retval) 664 struct lwp *l; 665 void *v; 666 register_t *retval; 667 { 668 struct linux_sys_msync_args /* { 669 syscallarg(caddr_t) addr; 670 syscallarg(int) len; 671 syscallarg(int) fl; 672 } */ *uap = v; 673 674 struct sys___msync13_args bma; 675 676 /* flags are ignored */ 677 SCARG(&bma, addr) = SCARG(uap, addr); 678 SCARG(&bma, len) = SCARG(uap, len); 679 SCARG(&bma, flags) = SCARG(uap, fl); 680 681 return sys___msync13(l, &bma, retval); 682 } 683 684 int 685 linux_sys_mprotect(l, v, retval) 686 struct lwp *l; 687 void *v; 688 register_t *retval; 689 { 690 struct linux_sys_mprotect_args /* { 691 syscallarg(const void *) start; 692 syscallarg(unsigned long) len; 693 syscallarg(int) prot; 694 } */ *uap = v; 695 struct vm_map_entry *entry; 696 struct vm_map *map; 697 struct proc *p; 698 vaddr_t end, start, len, stacklim; 699 int prot, grows; 700 701 start = (vaddr_t)SCARG(uap, start); 702 len = round_page(SCARG(uap, len)); 703 prot = SCARG(uap, prot); 704 grows = prot & (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP); 705 prot &= ~grows; 706 end = start + len; 707 708 if (start & PAGE_MASK) 709 return EINVAL; 710 if (end < start) 711 return EINVAL; 712 if (end == start) 713 return 0; 714 715 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) 716 return EINVAL; 717 if (grows == (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP)) 718 return EINVAL; 719 720 p = l->l_proc; 721 map = &p->p_vmspace->vm_map; 722 vm_map_lock(map); 723 # ifdef notdef 724 VM_MAP_RANGE_CHECK(map, start, end); 725 # endif 726 if (!uvm_map_lookup_entry(map, start, &entry) || entry->start > start) { 727 vm_map_unlock(map); 728 return ENOMEM; 729 } 730 731 /* 732 * Approximate the behaviour of PROT_GROWS{DOWN,UP}. 733 */ 734 735 stacklim = (vaddr_t)p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur; 736 if (grows & LINUX_PROT_GROWSDOWN) { 737 if (USRSTACK - stacklim <= start && start < USRSTACK) { 738 start = USRSTACK - stacklim; 739 } else { 740 start = entry->start; 741 } 742 } else if (grows & LINUX_PROT_GROWSUP) { 743 if (USRSTACK <= end && end < USRSTACK + stacklim) { 744 end = USRSTACK + stacklim; 745 } else { 746 end = entry->end; 747 } 748 } 749 vm_map_unlock(map); 750 return uvm_map_protect(map, start, end, prot, FALSE); 751 } 752 753 /* 754 * This code is partly stolen from src/lib/libc/compat-43/times.c 755 */ 756 757 #define CONVTCK(r) (r.tv_sec * hz + r.tv_usec / (1000000 / hz)) 758 759 int 760 linux_sys_times(l, v, retval) 761 struct lwp *l; 762 void *v; 763 register_t *retval; 764 { 765 struct linux_sys_times_args /* { 766 syscallarg(struct times *) tms; 767 } */ *uap = v; 768 struct proc *p = l->l_proc; 769 struct timeval t; 770 int error, s; 771 772 if (SCARG(uap, tms)) { 773 struct linux_tms ltms; 774 struct rusage ru; 775 776 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL); 777 ltms.ltms_utime = CONVTCK(ru.ru_utime); 778 ltms.ltms_stime = CONVTCK(ru.ru_stime); 779 780 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 781 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 782 783 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 784 return error; 785 } 786 787 s = splclock(); 788 timersub(&time, &boottime, &t); 789 splx(s); 790 791 retval[0] = ((linux_clock_t)(CONVTCK(t))); 792 return 0; 793 } 794 795 #undef CONVTCK 796 797 /* 798 * Linux 'readdir' call. This code is mostly taken from the 799 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 800 * an attempt has been made to keep it a little cleaner (failing 801 * miserably, because of the cruft needed if count 1 is passed). 802 * 803 * The d_off field should contain the offset of the next valid entry, 804 * but in Linux it has the offset of the entry itself. We emulate 805 * that bug here. 806 * 807 * Read in BSD-style entries, convert them, and copy them out. 808 * 809 * Note that this doesn't handle union-mounted filesystems. 810 */ 811 int 812 linux_sys_getdents(l, v, retval) 813 struct lwp *l; 814 void *v; 815 register_t *retval; 816 { 817 struct linux_sys_getdents_args /* { 818 syscallarg(int) fd; 819 syscallarg(struct linux_dirent *) dent; 820 syscallarg(unsigned int) count; 821 } */ *uap = v; 822 struct proc *p = l->l_proc; 823 struct dirent *bdp; 824 struct vnode *vp; 825 caddr_t inp, tbuf; /* BSD-format */ 826 int len, reclen; /* BSD-format */ 827 caddr_t outp; /* Linux-format */ 828 int resid, linux_reclen = 0; /* Linux-format */ 829 struct file *fp; 830 struct uio auio; 831 struct iovec aiov; 832 struct linux_dirent idb; 833 off_t off; /* true file offset */ 834 int buflen, error, eofflag, nbytes, oldcall; 835 struct vattr va; 836 off_t *cookiebuf = NULL, *cookie; 837 int ncookies; 838 839 /* getvnode() will use the descriptor for us */ 840 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 841 return (error); 842 843 if ((fp->f_flag & FREAD) == 0) { 844 error = EBADF; 845 goto out1; 846 } 847 848 vp = (struct vnode *)fp->f_data; 849 if (vp->v_type != VDIR) { 850 error = EINVAL; 851 goto out1; 852 } 853 854 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, l))) 855 goto out1; 856 857 nbytes = SCARG(uap, count); 858 if (nbytes == 1) { /* emulating old, broken behaviour */ 859 nbytes = sizeof (idb); 860 buflen = max(va.va_blocksize, nbytes); 861 oldcall = 1; 862 } else { 863 buflen = min(MAXBSIZE, nbytes); 864 if (buflen < va.va_blocksize) 865 buflen = va.va_blocksize; 866 oldcall = 0; 867 } 868 tbuf = malloc(buflen, M_TEMP, M_WAITOK); 869 870 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 871 off = fp->f_offset; 872 again: 873 aiov.iov_base = tbuf; 874 aiov.iov_len = buflen; 875 auio.uio_iov = &aiov; 876 auio.uio_iovcnt = 1; 877 auio.uio_rw = UIO_READ; 878 auio.uio_resid = buflen; 879 auio.uio_offset = off; 880 UIO_SETUP_SYSSPACE(&auio); 881 /* 882 * First we read into the malloc'ed buffer, then 883 * we massage it into user space, one record at a time. 884 */ 885 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 886 &ncookies); 887 if (error) 888 goto out; 889 890 inp = tbuf; 891 outp = (caddr_t)SCARG(uap, dent); 892 resid = nbytes; 893 if ((len = buflen - auio.uio_resid) == 0) 894 goto eof; 895 896 for (cookie = cookiebuf; len > 0; len -= reclen) { 897 bdp = (struct dirent *)inp; 898 reclen = bdp->d_reclen; 899 if (reclen & 3) 900 panic("linux_readdir"); 901 if (bdp->d_fileno == 0) { 902 inp += reclen; /* it is a hole; squish it out */ 903 if (cookie) 904 off = *cookie++; 905 else 906 off += reclen; 907 continue; 908 } 909 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 910 if (reclen > len || resid < linux_reclen) { 911 /* entry too big for buffer, so just stop */ 912 outp++; 913 break; 914 } 915 /* 916 * Massage in place to make a Linux-shaped dirent (otherwise 917 * we have to worry about touching user memory outside of 918 * the copyout() call). 919 */ 920 idb.d_ino = bdp->d_fileno; 921 /* 922 * The old readdir() call misuses the offset and reclen fields. 923 */ 924 if (oldcall) { 925 idb.d_off = (linux_off_t)linux_reclen; 926 idb.d_reclen = (u_short)bdp->d_namlen; 927 } else { 928 if (sizeof (idb.d_off) <= 4 && (off >> 32) != 0) { 929 compat_offseterr(vp, "linux_getdents"); 930 error = EINVAL; 931 goto out; 932 } 933 idb.d_off = (linux_off_t)off; 934 idb.d_reclen = (u_short)linux_reclen; 935 } 936 strcpy(idb.d_name, bdp->d_name); 937 if ((error = copyout((caddr_t)&idb, outp, linux_reclen))) 938 goto out; 939 /* advance past this real entry */ 940 inp += reclen; 941 if (cookie) 942 off = *cookie++; /* each entry points to itself */ 943 else 944 off += reclen; 945 /* advance output past Linux-shaped entry */ 946 outp += linux_reclen; 947 resid -= linux_reclen; 948 if (oldcall) 949 break; 950 } 951 952 /* if we squished out the whole block, try again */ 953 if (outp == (caddr_t)SCARG(uap, dent)) 954 goto again; 955 fp->f_offset = off; /* update the vnode offset */ 956 957 if (oldcall) 958 nbytes = resid + linux_reclen; 959 960 eof: 961 *retval = nbytes - resid; 962 out: 963 VOP_UNLOCK(vp, 0); 964 if (cookiebuf) 965 free(cookiebuf, M_TEMP); 966 free(tbuf, M_TEMP); 967 out1: 968 FILE_UNUSE(fp, l); 969 return error; 970 } 971 972 /* 973 * Even when just using registers to pass arguments to syscalls you can 974 * have 5 of them on the i386. So this newer version of select() does 975 * this. 976 */ 977 int 978 linux_sys_select(l, v, retval) 979 struct lwp *l; 980 void *v; 981 register_t *retval; 982 { 983 struct linux_sys_select_args /* { 984 syscallarg(int) nfds; 985 syscallarg(fd_set *) readfds; 986 syscallarg(fd_set *) writefds; 987 syscallarg(fd_set *) exceptfds; 988 syscallarg(struct timeval *) timeout; 989 } */ *uap = v; 990 991 return linux_select1(l, retval, SCARG(uap, nfds), SCARG(uap, readfds), 992 SCARG(uap, writefds), SCARG(uap, exceptfds), SCARG(uap, timeout)); 993 } 994 995 /* 996 * Common code for the old and new versions of select(). A couple of 997 * things are important: 998 * 1) return the amount of time left in the 'timeout' parameter 999 * 2) select never returns ERESTART on Linux, always return EINTR 1000 */ 1001 int 1002 linux_select1(l, retval, nfds, readfds, writefds, exceptfds, timeout) 1003 struct lwp *l; 1004 register_t *retval; 1005 int nfds; 1006 fd_set *readfds, *writefds, *exceptfds; 1007 struct timeval *timeout; 1008 { 1009 struct sys_select_args bsa; 1010 struct proc *p = l->l_proc; 1011 struct timeval tv0, tv1, utv, *tvp; 1012 caddr_t sg; 1013 int error; 1014 1015 SCARG(&bsa, nd) = nfds; 1016 SCARG(&bsa, in) = readfds; 1017 SCARG(&bsa, ou) = writefds; 1018 SCARG(&bsa, ex) = exceptfds; 1019 SCARG(&bsa, tv) = timeout; 1020 1021 /* 1022 * Store current time for computation of the amount of 1023 * time left. 1024 */ 1025 if (timeout) { 1026 if ((error = copyin(timeout, &utv, sizeof(utv)))) 1027 return error; 1028 if (itimerfix(&utv)) { 1029 /* 1030 * The timeval was invalid. Convert it to something 1031 * valid that will act as it does under Linux. 1032 */ 1033 sg = stackgap_init(p, 0); 1034 tvp = stackgap_alloc(p, &sg, sizeof(utv)); 1035 utv.tv_sec += utv.tv_usec / 1000000; 1036 utv.tv_usec %= 1000000; 1037 if (utv.tv_usec < 0) { 1038 utv.tv_sec -= 1; 1039 utv.tv_usec += 1000000; 1040 } 1041 if (utv.tv_sec < 0) 1042 timerclear(&utv); 1043 if ((error = copyout(&utv, tvp, sizeof(utv)))) 1044 return error; 1045 SCARG(&bsa, tv) = tvp; 1046 } 1047 microtime(&tv0); 1048 } 1049 1050 error = sys_select(l, &bsa, retval); 1051 if (error) { 1052 /* 1053 * See fs/select.c in the Linux kernel. Without this, 1054 * Maelstrom doesn't work. 1055 */ 1056 if (error == ERESTART) 1057 error = EINTR; 1058 return error; 1059 } 1060 1061 if (timeout) { 1062 if (*retval) { 1063 /* 1064 * Compute how much time was left of the timeout, 1065 * by subtracting the current time and the time 1066 * before we started the call, and subtracting 1067 * that result from the user-supplied value. 1068 */ 1069 microtime(&tv1); 1070 timersub(&tv1, &tv0, &tv1); 1071 timersub(&utv, &tv1, &utv); 1072 if (utv.tv_sec < 0) 1073 timerclear(&utv); 1074 } else 1075 timerclear(&utv); 1076 if ((error = copyout(&utv, timeout, sizeof(utv)))) 1077 return error; 1078 } 1079 1080 return 0; 1081 } 1082 1083 /* 1084 * Get the process group of a certain process. Look it up 1085 * and return the value. 1086 */ 1087 int 1088 linux_sys_getpgid(l, v, retval) 1089 struct lwp *l; 1090 void *v; 1091 register_t *retval; 1092 { 1093 struct linux_sys_getpgid_args /* { 1094 syscallarg(int) pid; 1095 } */ *uap = v; 1096 struct proc *p = l->l_proc; 1097 struct proc *targp; 1098 1099 if (SCARG(uap, pid) != 0 && SCARG(uap, pid) != p->p_pid) { 1100 if ((targp = pfind(SCARG(uap, pid))) == 0) 1101 return ESRCH; 1102 } 1103 else 1104 targp = p; 1105 1106 retval[0] = targp->p_pgid; 1107 return 0; 1108 } 1109 1110 /* 1111 * Set the 'personality' (emulation mode) for the current process. Only 1112 * accept the Linux personality here (0). This call is needed because 1113 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 1114 * ELF binaries run in Linux mode, not SVR4 mode. 1115 */ 1116 int 1117 linux_sys_personality(l, v, retval) 1118 struct lwp *l; 1119 void *v; 1120 register_t *retval; 1121 { 1122 struct linux_sys_personality_args /* { 1123 syscallarg(int) per; 1124 } */ *uap = v; 1125 1126 if (SCARG(uap, per) != 0) 1127 return EINVAL; 1128 retval[0] = 0; 1129 return 0; 1130 } 1131 #endif /* !COMPAT_LINUX32 */ 1132 1133 #if defined(__i386__) || defined(__m68k__) || defined(COMPAT_LINUX32) 1134 /* 1135 * The calls are here because of type conversions. 1136 */ 1137 int 1138 linux_sys_setreuid16(l, v, retval) 1139 struct lwp *l; 1140 void *v; 1141 register_t *retval; 1142 { 1143 struct linux_sys_setreuid16_args /* { 1144 syscallarg(int) ruid; 1145 syscallarg(int) euid; 1146 } */ *uap = v; 1147 struct sys_setreuid_args bsa; 1148 1149 SCARG(&bsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 1150 (uid_t)-1 : SCARG(uap, ruid); 1151 SCARG(&bsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 1152 (uid_t)-1 : SCARG(uap, euid); 1153 1154 return sys_setreuid(l, &bsa, retval); 1155 } 1156 1157 int 1158 linux_sys_setregid16(l, v, retval) 1159 struct lwp *l; 1160 void *v; 1161 register_t *retval; 1162 { 1163 struct linux_sys_setregid16_args /* { 1164 syscallarg(int) rgid; 1165 syscallarg(int) egid; 1166 } */ *uap = v; 1167 struct sys_setregid_args bsa; 1168 1169 SCARG(&bsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 1170 (uid_t)-1 : SCARG(uap, rgid); 1171 SCARG(&bsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 1172 (uid_t)-1 : SCARG(uap, egid); 1173 1174 return sys_setregid(l, &bsa, retval); 1175 } 1176 1177 int 1178 linux_sys_setresuid16(l, v, retval) 1179 struct lwp *l; 1180 void *v; 1181 register_t *retval; 1182 { 1183 struct linux_sys_setresuid16_args /* { 1184 syscallarg(uid_t) ruid; 1185 syscallarg(uid_t) euid; 1186 syscallarg(uid_t) suid; 1187 } */ *uap = v; 1188 struct linux_sys_setresuid16_args lsa; 1189 1190 SCARG(&lsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 1191 (uid_t)-1 : SCARG(uap, ruid); 1192 SCARG(&lsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 1193 (uid_t)-1 : SCARG(uap, euid); 1194 SCARG(&lsa, suid) = ((linux_uid_t)SCARG(uap, suid) == (linux_uid_t)-1) ? 1195 (uid_t)-1 : SCARG(uap, suid); 1196 1197 return linux_sys_setresuid(l, &lsa, retval); 1198 } 1199 1200 int 1201 linux_sys_setresgid16(l, v, retval) 1202 struct lwp *l; 1203 void *v; 1204 register_t *retval; 1205 { 1206 struct linux_sys_setresgid16_args /* { 1207 syscallarg(gid_t) rgid; 1208 syscallarg(gid_t) egid; 1209 syscallarg(gid_t) sgid; 1210 } */ *uap = v; 1211 struct linux_sys_setresgid16_args lsa; 1212 1213 SCARG(&lsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 1214 (gid_t)-1 : SCARG(uap, rgid); 1215 SCARG(&lsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 1216 (gid_t)-1 : SCARG(uap, egid); 1217 SCARG(&lsa, sgid) = ((linux_gid_t)SCARG(uap, sgid) == (linux_gid_t)-1) ? 1218 (gid_t)-1 : SCARG(uap, sgid); 1219 1220 return linux_sys_setresgid(l, &lsa, retval); 1221 } 1222 1223 int 1224 linux_sys_getgroups16(l, v, retval) 1225 struct lwp *l; 1226 void *v; 1227 register_t *retval; 1228 { 1229 struct linux_sys_getgroups16_args /* { 1230 syscallarg(int) gidsetsize; 1231 syscallarg(linux_gid_t *) gidset; 1232 } */ *uap = v; 1233 struct proc *p = l->l_proc; 1234 caddr_t sg; 1235 int n, error, i; 1236 struct sys_getgroups_args bsa; 1237 gid_t *bset, *kbset; 1238 linux_gid_t *lset; 1239 struct pcred *pc = p->p_cred; 1240 1241 n = SCARG(uap, gidsetsize); 1242 if (n < 0) 1243 return EINVAL; 1244 error = 0; 1245 bset = kbset = NULL; 1246 lset = NULL; 1247 if (n > 0) { 1248 n = min(pc->pc_ucred->cr_ngroups, n); 1249 sg = stackgap_init(p, 0); 1250 bset = stackgap_alloc(p, &sg, n * sizeof (gid_t)); 1251 kbset = malloc(n * sizeof (gid_t), M_TEMP, M_WAITOK); 1252 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1253 if (bset == NULL || kbset == NULL || lset == NULL) 1254 { 1255 error = ENOMEM; 1256 goto out; 1257 } 1258 SCARG(&bsa, gidsetsize) = n; 1259 SCARG(&bsa, gidset) = bset; 1260 error = sys_getgroups(l, &bsa, retval); 1261 if (error != 0) 1262 goto out; 1263 error = copyin(bset, kbset, n * sizeof (gid_t)); 1264 if (error != 0) 1265 goto out; 1266 for (i = 0; i < n; i++) 1267 lset[i] = (linux_gid_t)kbset[i]; 1268 error = copyout(lset, SCARG(uap, gidset), 1269 n * sizeof (linux_gid_t)); 1270 } else 1271 *retval = pc->pc_ucred->cr_ngroups; 1272 out: 1273 if (kbset != NULL) 1274 free(kbset, M_TEMP); 1275 if (lset != NULL) 1276 free(lset, M_TEMP); 1277 return error; 1278 } 1279 1280 int 1281 linux_sys_setgroups16(l, v, retval) 1282 struct lwp *l; 1283 void *v; 1284 register_t *retval; 1285 { 1286 struct linux_sys_setgroups16_args /* { 1287 syscallarg(int) gidsetsize; 1288 syscallarg(linux_gid_t *) gidset; 1289 } */ *uap = v; 1290 struct proc *p = l->l_proc; 1291 caddr_t sg; 1292 int n; 1293 int error, i; 1294 struct sys_setgroups_args bsa; 1295 gid_t *bset, *kbset; 1296 linux_gid_t *lset; 1297 1298 n = SCARG(uap, gidsetsize); 1299 if (n < 0 || n > NGROUPS) 1300 return EINVAL; 1301 sg = stackgap_init(p, 0); 1302 bset = stackgap_alloc(p, &sg, n * sizeof (gid_t)); 1303 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1304 kbset = malloc(n * sizeof (gid_t), M_TEMP, M_WAITOK); 1305 if (bset == NULL || kbset == NULL || lset == NULL) 1306 { 1307 error = ENOMEM; 1308 goto out; 1309 } 1310 error = copyin(SCARG(uap, gidset), lset, n * sizeof (linux_gid_t)); 1311 if (error != 0) 1312 goto out; 1313 for (i = 0; i < n; i++) 1314 kbset[i] = (gid_t)lset[i]; 1315 error = copyout(kbset, bset, n * sizeof (gid_t)); 1316 if (error != 0) 1317 goto out; 1318 SCARG(&bsa, gidsetsize) = n; 1319 SCARG(&bsa, gidset) = bset; 1320 error = sys_setgroups(l, &bsa, retval); 1321 1322 out: 1323 if (lset != NULL) 1324 free(lset, M_TEMP); 1325 if (kbset != NULL) 1326 free(kbset, M_TEMP); 1327 1328 return error; 1329 } 1330 1331 #endif /* __i386__ || __m68k__ || COMPAT_LINUX32 */ 1332 1333 #ifndef COMPAT_LINUX32 1334 /* 1335 * We have nonexistent fsuid equal to uid. 1336 * If modification is requested, refuse. 1337 */ 1338 int 1339 linux_sys_setfsuid(l, v, retval) 1340 struct lwp *l; 1341 void *v; 1342 register_t *retval; 1343 { 1344 struct linux_sys_setfsuid_args /* { 1345 syscallarg(uid_t) uid; 1346 } */ *uap = v; 1347 struct proc *p = l->l_proc; 1348 uid_t uid; 1349 1350 uid = SCARG(uap, uid); 1351 if (p->p_cred->p_ruid != uid) 1352 return sys_nosys(l, v, retval); 1353 else 1354 return (0); 1355 } 1356 1357 /* XXX XXX XXX */ 1358 # ifndef alpha 1359 int 1360 linux_sys_getfsuid(l, v, retval) 1361 struct lwp *l; 1362 void *v; 1363 register_t *retval; 1364 { 1365 return sys_getuid(l, v, retval); 1366 } 1367 # endif 1368 1369 int 1370 linux_sys_setresuid(l, v, retval) 1371 struct lwp *l; 1372 void *v; 1373 register_t *retval; 1374 { 1375 struct linux_sys_setresuid_args /* { 1376 syscallarg(uid_t) ruid; 1377 syscallarg(uid_t) euid; 1378 syscallarg(uid_t) suid; 1379 } */ *uap = v; 1380 1381 /* 1382 * Note: These checks are a little different than the NetBSD 1383 * setreuid(2) call performs. This precisely follows the 1384 * behavior of the Linux kernel. 1385 */ 1386 1387 return do_setresuid(l, SCARG(uap, ruid), SCARG(uap, euid), 1388 SCARG(uap, suid), 1389 ID_R_EQ_R | ID_R_EQ_E | ID_R_EQ_S | 1390 ID_E_EQ_R | ID_E_EQ_E | ID_E_EQ_S | 1391 ID_S_EQ_R | ID_S_EQ_E | ID_S_EQ_S ); 1392 } 1393 1394 int 1395 linux_sys_getresuid(l, v, retval) 1396 struct lwp *l; 1397 void *v; 1398 register_t *retval; 1399 { 1400 struct linux_sys_getresuid_args /* { 1401 syscallarg(uid_t *) ruid; 1402 syscallarg(uid_t *) euid; 1403 syscallarg(uid_t *) suid; 1404 } */ *uap = v; 1405 struct proc *p = l->l_proc; 1406 struct pcred *pc = p->p_cred; 1407 int error; 1408 1409 /* 1410 * Linux copies these values out to userspace like so: 1411 * 1412 * 1. Copy out ruid. 1413 * 2. If that succeeds, copy out euid. 1414 * 3. If both of those succeed, copy out suid. 1415 */ 1416 if ((error = copyout(&pc->p_ruid, SCARG(uap, ruid), 1417 sizeof(uid_t))) != 0) 1418 return (error); 1419 1420 if ((error = copyout(&pc->pc_ucred->cr_uid, SCARG(uap, euid), 1421 sizeof(uid_t))) != 0) 1422 return (error); 1423 1424 return (copyout(&pc->p_svuid, SCARG(uap, suid), sizeof(uid_t))); 1425 } 1426 1427 int 1428 linux_sys_ptrace(l, v, retval) 1429 struct lwp *l; 1430 void *v; 1431 register_t *retval; 1432 { 1433 struct linux_sys_ptrace_args /* { 1434 i386, m68k, powerpc: T=int 1435 alpha, amd64: T=long 1436 syscallarg(T) request; 1437 syscallarg(T) pid; 1438 syscallarg(T) addr; 1439 syscallarg(T) data; 1440 } */ *uap = v; 1441 const int *ptr; 1442 int request; 1443 int error; 1444 1445 ptr = linux_ptrace_request_map; 1446 request = SCARG(uap, request); 1447 while (*ptr != -1) 1448 if (*ptr++ == request) { 1449 struct sys_ptrace_args pta; 1450 1451 SCARG(&pta, req) = *ptr; 1452 SCARG(&pta, pid) = SCARG(uap, pid); 1453 SCARG(&pta, addr) = (caddr_t)SCARG(uap, addr); 1454 SCARG(&pta, data) = SCARG(uap, data); 1455 1456 /* 1457 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1458 * to continue where the process left off previously. 1459 * The same thing is achieved by addr == (caddr_t) 1 1460 * on NetBSD, so rewrite 'addr' appropriately. 1461 */ 1462 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1463 SCARG(&pta, addr) = (caddr_t) 1; 1464 1465 error = sys_ptrace(l, &pta, retval); 1466 if (error) 1467 return error; 1468 switch (request) { 1469 case LINUX_PTRACE_PEEKTEXT: 1470 case LINUX_PTRACE_PEEKDATA: 1471 error = copyout (retval, 1472 (caddr_t)SCARG(uap, data), 1473 sizeof *retval); 1474 *retval = SCARG(uap, data); 1475 break; 1476 default: 1477 break; 1478 } 1479 return error; 1480 } 1481 else 1482 ptr++; 1483 1484 return LINUX_SYS_PTRACE_ARCH(l, uap, retval); 1485 } 1486 1487 int 1488 linux_sys_reboot(struct lwp *l, void *v, register_t *retval) 1489 { 1490 struct linux_sys_reboot_args /* { 1491 syscallarg(int) magic1; 1492 syscallarg(int) magic2; 1493 syscallarg(int) cmd; 1494 syscallarg(void *) arg; 1495 } */ *uap = v; 1496 struct sys_reboot_args /* { 1497 syscallarg(int) opt; 1498 syscallarg(char *) bootstr; 1499 } */ sra; 1500 struct proc *p = l->l_proc; 1501 int error; 1502 1503 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1504 return(error); 1505 1506 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1507 return(EINVAL); 1508 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1509 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1510 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1511 return(EINVAL); 1512 1513 switch (SCARG(uap, cmd)) { 1514 case LINUX_REBOOT_CMD_RESTART: 1515 SCARG(&sra, opt) = RB_AUTOBOOT; 1516 break; 1517 case LINUX_REBOOT_CMD_HALT: 1518 SCARG(&sra, opt) = RB_HALT; 1519 break; 1520 case LINUX_REBOOT_CMD_POWER_OFF: 1521 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1522 break; 1523 case LINUX_REBOOT_CMD_RESTART2: 1524 /* Reboot with an argument. */ 1525 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1526 SCARG(&sra, bootstr) = SCARG(uap, arg); 1527 break; 1528 case LINUX_REBOOT_CMD_CAD_ON: 1529 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1530 case LINUX_REBOOT_CMD_CAD_OFF: 1531 return(0); 1532 default: 1533 return(EINVAL); 1534 } 1535 1536 return(sys_reboot(l, &sra, retval)); 1537 } 1538 1539 /* 1540 * Copy of compat_12_sys_swapon(). 1541 */ 1542 int 1543 linux_sys_swapon(l, v, retval) 1544 struct lwp *l; 1545 void *v; 1546 register_t *retval; 1547 { 1548 struct sys_swapctl_args ua; 1549 struct linux_sys_swapon_args /* { 1550 syscallarg(const char *) name; 1551 } */ *uap = v; 1552 1553 SCARG(&ua, cmd) = SWAP_ON; 1554 SCARG(&ua, arg) = (void *)__UNCONST(SCARG(uap, name)); 1555 SCARG(&ua, misc) = 0; /* priority */ 1556 return (sys_swapctl(l, &ua, retval)); 1557 } 1558 1559 /* 1560 * Stop swapping to the file or block device specified by path. 1561 */ 1562 int 1563 linux_sys_swapoff(l, v, retval) 1564 struct lwp *l; 1565 void *v; 1566 register_t *retval; 1567 { 1568 struct sys_swapctl_args ua; 1569 struct linux_sys_swapoff_args /* { 1570 syscallarg(const char *) path; 1571 } */ *uap = v; 1572 1573 SCARG(&ua, cmd) = SWAP_OFF; 1574 SCARG(&ua, arg) = __UNCONST(SCARG(uap, path)); /*XXXUNCONST*/ 1575 return (sys_swapctl(l, &ua, retval)); 1576 } 1577 1578 /* 1579 * Copy of compat_09_sys_setdomainname() 1580 */ 1581 /* ARGSUSED */ 1582 int 1583 linux_sys_setdomainname(l, v, retval) 1584 struct lwp *l; 1585 void *v; 1586 register_t *retval; 1587 { 1588 struct linux_sys_setdomainname_args /* { 1589 syscallarg(char *) domainname; 1590 syscallarg(int) len; 1591 } */ *uap = v; 1592 int name[2]; 1593 1594 name[0] = CTL_KERN; 1595 name[1] = KERN_DOMAINNAME; 1596 return (old_sysctl(&name[0], 2, 0, 0, SCARG(uap, domainname), 1597 SCARG(uap, len), l)); 1598 } 1599 1600 /* 1601 * sysinfo() 1602 */ 1603 /* ARGSUSED */ 1604 int 1605 linux_sys_sysinfo(l, v, retval) 1606 struct lwp *l; 1607 void *v; 1608 register_t *retval; 1609 { 1610 struct linux_sys_sysinfo_args /* { 1611 syscallarg(struct linux_sysinfo *) arg; 1612 } */ *uap = v; 1613 struct linux_sysinfo si; 1614 struct loadavg *la; 1615 1616 si.uptime = time.tv_sec - boottime.tv_sec; 1617 la = &averunnable; 1618 si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1619 si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1620 si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1621 si.totalram = ctob(physmem); 1622 si.freeram = uvmexp.free * uvmexp.pagesize; 1623 si.sharedram = 0; /* XXX */ 1624 si.bufferram = uvmexp.filepages * uvmexp.pagesize; 1625 si.totalswap = uvmexp.swpages * uvmexp.pagesize; 1626 si.freeswap = (uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize; 1627 si.procs = nprocs; 1628 1629 /* The following are only present in newer Linux kernels. */ 1630 si.totalbig = 0; 1631 si.freebig = 0; 1632 si.mem_unit = 1; 1633 1634 return (copyout(&si, SCARG(uap, arg), sizeof si)); 1635 } 1636 1637 int 1638 linux_sys_getrlimit(l, v, retval) 1639 struct lwp *l; 1640 void *v; 1641 register_t *retval; 1642 { 1643 struct linux_sys_getrlimit_args /* { 1644 syscallarg(int) which; 1645 # ifdef LINUX_LARGEFILE64 1646 syscallarg(struct rlimit *) rlp; 1647 # else 1648 syscallarg(struct orlimit *) rlp; 1649 # endif 1650 } */ *uap = v; 1651 struct proc *p = l->l_proc; 1652 caddr_t sg = stackgap_init(p, 0); 1653 struct sys_getrlimit_args ap; 1654 struct rlimit rl; 1655 # ifdef LINUX_LARGEFILE64 1656 struct rlimit orl; 1657 # else 1658 struct orlimit orl; 1659 # endif 1660 int error; 1661 1662 SCARG(&ap, which) = linux_to_bsd_limit(SCARG(uap, which)); 1663 if ((error = SCARG(&ap, which)) < 0) 1664 return -error; 1665 SCARG(&ap, rlp) = stackgap_alloc(p, &sg, sizeof rl); 1666 if ((error = sys_getrlimit(l, &ap, retval)) != 0) 1667 return error; 1668 if ((error = copyin(SCARG(&ap, rlp), &rl, sizeof(rl))) != 0) 1669 return error; 1670 bsd_to_linux_rlimit(&orl, &rl); 1671 1672 return copyout(&orl, SCARG(uap, rlp), sizeof(orl)); 1673 } 1674 1675 int 1676 linux_sys_setrlimit(l, v, retval) 1677 struct lwp *l; 1678 void *v; 1679 register_t *retval; 1680 { 1681 struct linux_sys_setrlimit_args /* { 1682 syscallarg(int) which; 1683 # ifdef LINUX_LARGEFILE64 1684 syscallarg(struct rlimit *) rlp; 1685 # else 1686 syscallarg(struct orlimit *) rlp; 1687 # endif 1688 } */ *uap = v; 1689 struct proc *p = l->l_proc; 1690 caddr_t sg = stackgap_init(p, 0); 1691 struct sys_getrlimit_args ap; 1692 struct rlimit rl; 1693 # ifdef LINUX_LARGEFILE64 1694 struct rlimit orl; 1695 # else 1696 struct orlimit orl; 1697 # endif 1698 int error; 1699 1700 SCARG(&ap, which) = linux_to_bsd_limit(SCARG(uap, which)); 1701 SCARG(&ap, rlp) = stackgap_alloc(p, &sg, sizeof rl); 1702 if ((error = SCARG(&ap, which)) < 0) 1703 return -error; 1704 if ((error = copyin(SCARG(uap, rlp), &orl, sizeof(orl))) != 0) 1705 return error; 1706 linux_to_bsd_rlimit(&rl, &orl); 1707 if ((error = copyout(&rl, SCARG(&ap, rlp), sizeof(rl))) != 0) 1708 return error; 1709 return sys_setrlimit(l, &ap, retval); 1710 } 1711 1712 # if !defined(__mips__) && !defined(__amd64__) 1713 /* XXX: this doesn't look 100% common, at least mips doesn't have it */ 1714 int 1715 linux_sys_ugetrlimit(l, v, retval) 1716 struct lwp *l; 1717 void *v; 1718 register_t *retval; 1719 { 1720 return linux_sys_getrlimit(l, v, retval); 1721 } 1722 # endif 1723 1724 /* 1725 * This gets called for unsupported syscalls. The difference to sys_nosys() 1726 * is that process does not get SIGSYS, the call just returns with ENOSYS. 1727 * This is the way Linux does it and glibc depends on this behaviour. 1728 */ 1729 int 1730 linux_sys_nosys(l, v, retval) 1731 struct lwp *l; 1732 void *v; 1733 register_t *retval; 1734 { 1735 return (ENOSYS); 1736 } 1737 1738 #endif /* !COMPAT_LINUX32 */ 1739