1 /* $NetBSD: linux_misc.c,v 1.101 2002/02/20 17:03:03 christos 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 1.101 2002/02/20 17:03:03 christos 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/syscallargs.h> 103 104 #include <compat/linux/common/linux_types.h> 105 #include <compat/linux/common/linux_signal.h> 106 107 #include <compat/linux/linux_syscallargs.h> 108 109 #include <compat/linux/common/linux_fcntl.h> 110 #include <compat/linux/common/linux_mmap.h> 111 #include <compat/linux/common/linux_dirent.h> 112 #include <compat/linux/common/linux_util.h> 113 #include <compat/linux/common/linux_misc.h> 114 #include <compat/linux/common/linux_ptrace.h> 115 #include <compat/linux/common/linux_reboot.h> 116 #include <compat/linux/common/linux_emuldata.h> 117 118 const int linux_ptrace_request_map[] = { 119 LINUX_PTRACE_TRACEME, PT_TRACE_ME, 120 LINUX_PTRACE_PEEKTEXT, PT_READ_I, 121 LINUX_PTRACE_PEEKDATA, PT_READ_D, 122 LINUX_PTRACE_POKETEXT, PT_WRITE_I, 123 LINUX_PTRACE_POKEDATA, PT_WRITE_D, 124 LINUX_PTRACE_CONT, PT_CONTINUE, 125 LINUX_PTRACE_KILL, PT_KILL, 126 LINUX_PTRACE_ATTACH, PT_ATTACH, 127 LINUX_PTRACE_DETACH, PT_DETACH, 128 #ifdef PT_STEP 129 LINUX_PTRACE_SINGLESTEP, PT_STEP, 130 #endif 131 -1 132 }; 133 134 const static struct mnttypes { 135 char *bsd; 136 int linux; 137 } fstypes[] = { 138 { MOUNT_FFS, LINUX_DEFAULT_SUPER_MAGIC }, 139 { MOUNT_NFS, LINUX_NFS_SUPER_MAGIC }, 140 { MOUNT_MFS, LINUX_DEFAULT_SUPER_MAGIC }, 141 { MOUNT_MSDOS, LINUX_MSDOS_SUPER_MAGIC }, 142 { MOUNT_LFS, LINUX_DEFAULT_SUPER_MAGIC }, 143 { MOUNT_FDESC, LINUX_DEFAULT_SUPER_MAGIC }, 144 { MOUNT_PORTAL, LINUX_DEFAULT_SUPER_MAGIC }, 145 { MOUNT_NULL, LINUX_DEFAULT_SUPER_MAGIC }, 146 { MOUNT_OVERLAY, LINUX_DEFAULT_SUPER_MAGIC }, 147 { MOUNT_UMAP, LINUX_DEFAULT_SUPER_MAGIC }, 148 { MOUNT_KERNFS, LINUX_DEFAULT_SUPER_MAGIC }, 149 { MOUNT_PROCFS, LINUX_PROC_SUPER_MAGIC }, 150 { MOUNT_AFS, LINUX_DEFAULT_SUPER_MAGIC }, 151 { MOUNT_CD9660, LINUX_ISOFS_SUPER_MAGIC }, 152 { MOUNT_UNION, LINUX_DEFAULT_SUPER_MAGIC }, 153 { MOUNT_ADOSFS, LINUX_ADFS_SUPER_MAGIC }, 154 { MOUNT_EXT2FS, LINUX_EXT2_SUPER_MAGIC }, 155 { MOUNT_CFS, LINUX_DEFAULT_SUPER_MAGIC }, 156 { MOUNT_CODA, LINUX_CODA_SUPER_MAGIC }, 157 { MOUNT_FILECORE, LINUX_DEFAULT_SUPER_MAGIC }, 158 { MOUNT_NTFS, LINUX_DEFAULT_SUPER_MAGIC }, 159 { MOUNT_SMBFS, LINUX_SMB_SUPER_MAGIC } 160 }; 161 #define FSTYPESSIZE (sizeof(fstypes) / sizeof(fstypes[0])) 162 163 /* Local linux_misc.c functions: */ 164 static void bsd_to_linux_statfs __P((struct statfs *, struct linux_statfs *)); 165 static int linux_to_bsd_limit __P((int)); 166 167 /* 168 * The information on a terminated (or stopped) process needs 169 * to be converted in order for Linux binaries to get a valid signal 170 * number out of it. 171 */ 172 void 173 bsd_to_linux_wstat(st) 174 int *st; 175 { 176 177 int sig; 178 179 if (WIFSIGNALED(*st)) { 180 sig = WTERMSIG(*st); 181 if (sig >= 0 && sig < NSIG) 182 *st= (*st& ~0177) | native_to_linux_sig[sig]; 183 } else if (WIFSTOPPED(*st)) { 184 sig = WSTOPSIG(*st); 185 if (sig >= 0 && sig < NSIG) 186 *st = (*st & ~0xff00) | (native_to_linux_sig[sig] << 8); 187 } 188 } 189 190 /* 191 * This is very much the same as waitpid() 192 */ 193 int 194 linux_sys_wait4(p, v, retval) 195 struct proc *p; 196 void *v; 197 register_t *retval; 198 { 199 struct linux_sys_wait4_args /* { 200 syscallarg(int) pid; 201 syscallarg(int *) status; 202 syscallarg(int) options; 203 syscallarg(struct rusage *) rusage; 204 } */ *uap = v; 205 struct sys_wait4_args w4a; 206 int error, *status, tstat, options, linux_options; 207 caddr_t sg; 208 209 if (SCARG(uap, status) != NULL) { 210 sg = stackgap_init(p->p_emul); 211 status = (int *) stackgap_alloc(&sg, sizeof *status); 212 } else 213 status = NULL; 214 215 linux_options = SCARG(uap, options); 216 options = 0; 217 if (linux_options & 218 ~(LINUX_WAIT4_WNOHANG|LINUX_WAIT4_WUNTRACED|LINUX_WAIT4_WALL| 219 LINUX_WAIT4_WCLONE)) 220 return (EINVAL); 221 222 if (linux_options & LINUX_WAIT4_WNOHANG) 223 options |= WNOHANG; 224 if (linux_options & LINUX_WAIT4_WUNTRACED) 225 options |= WUNTRACED; 226 if (linux_options & LINUX_WAIT4_WALL) 227 options |= WALLSIG; 228 if (linux_options & LINUX_WAIT4_WCLONE) 229 options |= WALTSIG; 230 231 SCARG(&w4a, pid) = SCARG(uap, pid); 232 SCARG(&w4a, status) = status; 233 SCARG(&w4a, options) = options; 234 SCARG(&w4a, rusage) = SCARG(uap, rusage); 235 236 if ((error = sys_wait4(p, &w4a, retval))) 237 return error; 238 239 sigdelset(&p->p_sigctx.ps_siglist, SIGCHLD); 240 241 if (status != NULL) { 242 if ((error = copyin(status, &tstat, sizeof tstat))) 243 return error; 244 245 bsd_to_linux_wstat(&tstat); 246 return copyout(&tstat, SCARG(uap, status), sizeof tstat); 247 } 248 249 return 0; 250 } 251 252 /* 253 * Linux brk(2). The check if the new address is >= the old one is 254 * done in the kernel in Linux. NetBSD does it in the library. 255 */ 256 int 257 linux_sys_brk(p, v, retval) 258 struct proc *p; 259 void *v; 260 register_t *retval; 261 { 262 struct linux_sys_brk_args /* { 263 syscallarg(char *) nsize; 264 } */ *uap = v; 265 char *nbrk = SCARG(uap, nsize); 266 struct sys_obreak_args oba; 267 struct vmspace *vm = p->p_vmspace; 268 struct linux_emuldata *ed = (struct linux_emuldata*)p->p_emuldata; 269 270 SCARG(&oba, nsize) = nbrk; 271 272 if ((caddr_t) nbrk > vm->vm_daddr && sys_obreak(p, &oba, retval) == 0) 273 ed->p_break = (char*)nbrk; 274 else 275 nbrk = ed->p_break; 276 277 retval[0] = (register_t)nbrk; 278 279 return 0; 280 } 281 282 /* 283 * Convert BSD statfs structure to Linux statfs structure. 284 * The Linux structure has less fields, and it also wants 285 * the length of a name in a dir entry in a field, which 286 * we fake (probably the wrong way). 287 */ 288 static void 289 bsd_to_linux_statfs(bsp, lsp) 290 struct statfs *bsp; 291 struct linux_statfs *lsp; 292 { 293 int i; 294 295 for (i = 0; i < FSTYPESSIZE; i++) 296 if (strcmp(bsp->f_fstypename, fstypes[i].bsd) == 0) 297 break; 298 299 if (i == FSTYPESSIZE) { 300 #ifdef DIAGNOSTIC 301 printf("unhandled fstype in linux emulation: %s\n", 302 bsp->f_fstypename); 303 #endif 304 lsp->l_ftype = LINUX_DEFAULT_SUPER_MAGIC; 305 } else { 306 lsp->l_ftype = fstypes[i].linux; 307 } 308 309 lsp->l_fbsize = bsp->f_bsize; 310 lsp->l_fblocks = bsp->f_blocks; 311 lsp->l_fbfree = bsp->f_bfree; 312 lsp->l_fbavail = bsp->f_bavail; 313 lsp->l_ffiles = bsp->f_files; 314 lsp->l_fffree = bsp->f_ffree; 315 /* Linux sets the fsid to 0..., we don't */ 316 lsp->l_ffsid.val[0] = bsp->f_fsid.val[0]; 317 lsp->l_ffsid.val[1] = bsp->f_fsid.val[1]; 318 lsp->l_fnamelen = MAXNAMLEN; /* XXX */ 319 (void)memset(lsp->l_fspare, 0, sizeof(lsp->l_fspare)); 320 } 321 322 /* 323 * Implement the fs stat functions. Straightforward. 324 */ 325 int 326 linux_sys_statfs(p, v, retval) 327 struct proc *p; 328 void *v; 329 register_t *retval; 330 { 331 struct linux_sys_statfs_args /* { 332 syscallarg(const char *) path; 333 syscallarg(struct linux_statfs *) sp; 334 } */ *uap = v; 335 struct statfs btmp, *bsp; 336 struct linux_statfs ltmp; 337 struct sys_statfs_args bsa; 338 caddr_t sg; 339 int error; 340 341 sg = stackgap_init(p->p_emul); 342 bsp = (struct statfs *) stackgap_alloc(&sg, sizeof (struct statfs)); 343 344 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 345 346 SCARG(&bsa, path) = SCARG(uap, path); 347 SCARG(&bsa, buf) = bsp; 348 349 if ((error = sys_statfs(p, &bsa, retval))) 350 return error; 351 352 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 353 return error; 354 355 bsd_to_linux_statfs(&btmp, <mp); 356 357 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 358 } 359 360 int 361 linux_sys_fstatfs(p, v, retval) 362 struct proc *p; 363 void *v; 364 register_t *retval; 365 { 366 struct linux_sys_fstatfs_args /* { 367 syscallarg(int) fd; 368 syscallarg(struct linux_statfs *) sp; 369 } */ *uap = v; 370 struct statfs btmp, *bsp; 371 struct linux_statfs ltmp; 372 struct sys_fstatfs_args bsa; 373 caddr_t sg; 374 int error; 375 376 sg = stackgap_init(p->p_emul); 377 bsp = (struct statfs *) stackgap_alloc(&sg, sizeof (struct statfs)); 378 379 SCARG(&bsa, fd) = SCARG(uap, fd); 380 SCARG(&bsa, buf) = bsp; 381 382 if ((error = sys_fstatfs(p, &bsa, retval))) 383 return error; 384 385 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 386 return error; 387 388 bsd_to_linux_statfs(&btmp, <mp); 389 390 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 391 } 392 393 /* 394 * uname(). Just copy the info from the various strings stored in the 395 * kernel, and put it in the Linux utsname structure. That structure 396 * is almost the same as the NetBSD one, only it has fields 65 characters 397 * long, and an extra domainname field. 398 */ 399 int 400 linux_sys_uname(p, v, retval) 401 struct proc *p; 402 void *v; 403 register_t *retval; 404 { 405 struct linux_sys_uname_args /* { 406 syscallarg(struct linux_utsname *) up; 407 } */ *uap = v; 408 struct linux_utsname luts; 409 410 strncpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 411 strncpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 412 strncpy(luts.l_release, linux_release, sizeof(luts.l_release)); 413 strncpy(luts.l_version, linux_version, sizeof(luts.l_version)); 414 strncpy(luts.l_machine, machine, sizeof(luts.l_machine)); 415 strncpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 416 417 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 418 } 419 420 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 421 /* Used indirectly on: arm, i386, m68k */ 422 423 /* 424 * New type Linux mmap call. 425 * Only called directly on machines with >= 6 free regs. 426 */ 427 int 428 linux_sys_mmap(p, v, retval) 429 struct proc *p; 430 void *v; 431 register_t *retval; 432 { 433 struct linux_sys_mmap_args /* { 434 syscallarg(unsigned long) addr; 435 syscallarg(size_t) len; 436 syscallarg(int) prot; 437 syscallarg(int) flags; 438 syscallarg(int) fd; 439 syscallarg(linux_off_t) offset; 440 } */ *uap = v; 441 struct sys_mmap_args cma; 442 int flags; 443 444 flags = 0; 445 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_SHARED, MAP_SHARED); 446 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_PRIVATE, MAP_PRIVATE); 447 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_FIXED, MAP_FIXED); 448 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_ANON, MAP_ANON); 449 /* XXX XAX ERH: Any other flags here? There are more defined... */ 450 451 SCARG(&cma,addr) = (void *)SCARG(uap, addr); 452 SCARG(&cma,len) = SCARG(uap, len); 453 SCARG(&cma,prot) = SCARG(uap, prot); 454 if (SCARG(&cma,prot) & VM_PROT_WRITE) /* XXX */ 455 SCARG(&cma,prot) |= VM_PROT_READ; 456 SCARG(&cma,flags) = flags; 457 SCARG(&cma,fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 458 SCARG(&cma,pad) = 0; 459 SCARG(&cma,pos) = (off_t)SCARG(uap, offset); 460 461 return sys_mmap(p, &cma, retval); 462 } 463 464 /* 465 * Newer type Linux mmap call. 466 */ 467 int 468 linux_sys_mmap2(p, v, retval) 469 struct proc *p; 470 void *v; 471 register_t *retval; 472 { 473 struct linux_sys_mmap2_args /* { 474 syscallarg(void *) addr; 475 syscallarg(size_t) len; 476 syscallarg(int) prot; 477 syscallarg(int) flags; 478 syscallarg(int) fd; 479 syscallarg(off_t) offset; 480 } */ *uap = v; 481 struct sys_mmap_args cma; 482 int flags; 483 484 flags = 0; 485 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_SHARED, MAP_SHARED); 486 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_PRIVATE, MAP_PRIVATE); 487 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_FIXED, MAP_FIXED); 488 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_ANON, MAP_ANON); 489 /* XXX XAX ERH: Any other flags here? There are more defined... */ 490 491 SCARG(&cma,addr) = (void *)SCARG(uap, addr); 492 SCARG(&cma,len) = SCARG(uap, len); 493 SCARG(&cma,prot) = SCARG(uap, prot); 494 if (SCARG(&cma,prot) & VM_PROT_WRITE) /* XXX */ 495 SCARG(&cma,prot) |= VM_PROT_READ; 496 SCARG(&cma,flags) = flags; 497 SCARG(&cma,fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 498 SCARG(&cma,pos) = (off_t)SCARG(uap, offset); 499 500 return sys_mmap(p, &cma, retval); 501 } 502 503 int 504 linux_sys_mremap(p, v, retval) 505 struct proc *p; 506 void *v; 507 register_t *retval; 508 { 509 struct linux_sys_mremap_args /* { 510 syscallarg(void *) old_address; 511 syscallarg(size_t) old_size; 512 syscallarg(size_t) new_size; 513 syscallarg(u_long) flags; 514 } */ *uap = v; 515 struct sys_munmap_args mua; 516 size_t old_size, new_size; 517 int error; 518 519 old_size = round_page(SCARG(uap, old_size)); 520 new_size = round_page(SCARG(uap, new_size)); 521 522 /* 523 * Growing mapped region. 524 */ 525 if (new_size > old_size) { 526 /* 527 * XXX Implement me. What we probably want to do is 528 * XXX dig out the guts of the old mapping, mmap that 529 * XXX object again with the new size, then munmap 530 * XXX the old mapping. 531 */ 532 *retval = 0; 533 return (ENOMEM); 534 } 535 536 /* 537 * Shrinking mapped region. 538 */ 539 if (new_size < old_size) { 540 SCARG(&mua, addr) = (caddr_t)SCARG(uap, old_address) + 541 new_size; 542 SCARG(&mua, len) = old_size - new_size; 543 error = sys_munmap(p, &mua, retval); 544 *retval = error ? 0 : (register_t)SCARG(uap, old_address); 545 return (error); 546 } 547 548 /* 549 * No change. 550 */ 551 *retval = (register_t)SCARG(uap, old_address); 552 return (0); 553 } 554 555 int 556 linux_sys_msync(p, v, retval) 557 struct proc *p; 558 void *v; 559 register_t *retval; 560 { 561 struct linux_sys_msync_args /* { 562 syscallarg(caddr_t) addr; 563 syscallarg(int) len; 564 syscallarg(int) fl; 565 } */ *uap = v; 566 567 struct sys___msync13_args bma; 568 569 /* flags are ignored */ 570 SCARG(&bma, addr) = SCARG(uap, addr); 571 SCARG(&bma, len) = SCARG(uap, len); 572 SCARG(&bma, flags) = SCARG(uap, fl); 573 574 return sys___msync13(p, &bma, retval); 575 } 576 577 /* 578 * This code is partly stolen from src/lib/libc/compat-43/times.c 579 * XXX - CLK_TCK isn't declared in /sys, just in <time.h>, done here 580 */ 581 582 #define CLK_TCK 100 583 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 584 585 int 586 linux_sys_times(p, v, retval) 587 struct proc *p; 588 void *v; 589 register_t *retval; 590 { 591 struct linux_sys_times_args /* { 592 syscallarg(struct times *) tms; 593 } */ *uap = v; 594 struct timeval t; 595 struct linux_tms ltms; 596 struct rusage ru; 597 int error, s; 598 599 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL); 600 ltms.ltms_utime = CONVTCK(ru.ru_utime); 601 ltms.ltms_stime = CONVTCK(ru.ru_stime); 602 603 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 604 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 605 606 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 607 return error; 608 609 s = splclock(); 610 timersub(&time, &boottime, &t); 611 splx(s); 612 613 retval[0] = ((linux_clock_t)(CONVTCK(t))); 614 return 0; 615 } 616 617 /* 618 * Linux 'readdir' call. This code is mostly taken from the 619 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 620 * an attempt has been made to keep it a little cleaner (failing 621 * miserably, because of the cruft needed if count 1 is passed). 622 * 623 * The d_off field should contain the offset of the next valid entry, 624 * but in Linux it has the offset of the entry itself. We emulate 625 * that bug here. 626 * 627 * Read in BSD-style entries, convert them, and copy them out. 628 * 629 * Note that this doesn't handle union-mounted filesystems. 630 */ 631 int 632 linux_sys_getdents(p, v, retval) 633 struct proc *p; 634 void *v; 635 register_t *retval; 636 { 637 struct linux_sys_getdents_args /* { 638 syscallarg(int) fd; 639 syscallarg(struct linux_dirent *) dent; 640 syscallarg(unsigned int) count; 641 } */ *uap = v; 642 struct dirent *bdp; 643 struct vnode *vp; 644 caddr_t inp, buf; /* BSD-format */ 645 int len, reclen; /* BSD-format */ 646 caddr_t outp; /* Linux-format */ 647 int resid, linux_reclen = 0; /* Linux-format */ 648 struct file *fp; 649 struct uio auio; 650 struct iovec aiov; 651 struct linux_dirent idb; 652 off_t off; /* true file offset */ 653 int buflen, error, eofflag, nbytes, oldcall; 654 struct vattr va; 655 off_t *cookiebuf = NULL, *cookie; 656 int ncookies; 657 658 /* getvnode() will use the descriptor for us */ 659 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 660 return (error); 661 662 if ((fp->f_flag & FREAD) == 0) { 663 error = EBADF; 664 goto out1; 665 } 666 667 vp = (struct vnode *)fp->f_data; 668 if (vp->v_type != VDIR) { 669 error = EINVAL; 670 goto out1; 671 } 672 673 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) 674 goto out1; 675 676 nbytes = SCARG(uap, count); 677 if (nbytes == 1) { /* emulating old, broken behaviour */ 678 nbytes = sizeof (struct linux_dirent); 679 buflen = max(va.va_blocksize, nbytes); 680 oldcall = 1; 681 } else { 682 buflen = min(MAXBSIZE, nbytes); 683 if (buflen < va.va_blocksize) 684 buflen = va.va_blocksize; 685 oldcall = 0; 686 } 687 buf = malloc(buflen, M_TEMP, M_WAITOK); 688 689 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 690 off = fp->f_offset; 691 again: 692 aiov.iov_base = buf; 693 aiov.iov_len = buflen; 694 auio.uio_iov = &aiov; 695 auio.uio_iovcnt = 1; 696 auio.uio_rw = UIO_READ; 697 auio.uio_segflg = UIO_SYSSPACE; 698 auio.uio_procp = p; 699 auio.uio_resid = buflen; 700 auio.uio_offset = off; 701 /* 702 * First we read into the malloc'ed buffer, then 703 * we massage it into user space, one record at a time. 704 */ 705 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 706 &ncookies); 707 if (error) 708 goto out; 709 710 inp = buf; 711 outp = (caddr_t)SCARG(uap, dent); 712 resid = nbytes; 713 if ((len = buflen - auio.uio_resid) == 0) 714 goto eof; 715 716 for (cookie = cookiebuf; len > 0; len -= reclen) { 717 bdp = (struct dirent *)inp; 718 reclen = bdp->d_reclen; 719 if (reclen & 3) 720 panic("linux_readdir"); 721 if (bdp->d_fileno == 0) { 722 inp += reclen; /* it is a hole; squish it out */ 723 off = *cookie++; 724 continue; 725 } 726 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 727 if (reclen > len || resid < linux_reclen) { 728 /* entry too big for buffer, so just stop */ 729 outp++; 730 break; 731 } 732 /* 733 * Massage in place to make a Linux-shaped dirent (otherwise 734 * we have to worry about touching user memory outside of 735 * the copyout() call). 736 */ 737 idb.d_ino = (linux_ino_t)bdp->d_fileno; 738 /* 739 * The old readdir() call misuses the offset and reclen fields. 740 */ 741 if (oldcall) { 742 idb.d_off = (linux_off_t)linux_reclen; 743 idb.d_reclen = (u_short)bdp->d_namlen; 744 } else { 745 if (sizeof (linux_off_t) < 4 && (off >> 32) != 0) { 746 compat_offseterr(vp, "linux_getdents"); 747 error = EINVAL; 748 goto out; 749 } 750 idb.d_off = (linux_off_t)off; 751 idb.d_reclen = (u_short)linux_reclen; 752 } 753 strcpy(idb.d_name, bdp->d_name); 754 if ((error = copyout((caddr_t)&idb, outp, linux_reclen))) 755 goto out; 756 /* advance past this real entry */ 757 inp += reclen; 758 off = *cookie++; /* each entry points to itself */ 759 /* advance output past Linux-shaped entry */ 760 outp += linux_reclen; 761 resid -= linux_reclen; 762 if (oldcall) 763 break; 764 } 765 766 /* if we squished out the whole block, try again */ 767 if (outp == (caddr_t)SCARG(uap, dent)) 768 goto again; 769 fp->f_offset = off; /* update the vnode offset */ 770 771 if (oldcall) 772 nbytes = resid + linux_reclen; 773 774 eof: 775 *retval = nbytes - resid; 776 out: 777 VOP_UNLOCK(vp, 0); 778 if (cookiebuf) 779 free(cookiebuf, M_TEMP); 780 free(buf, M_TEMP); 781 out1: 782 FILE_UNUSE(fp, p); 783 return error; 784 } 785 786 /* 787 * Even when just using registers to pass arguments to syscalls you can 788 * have 5 of them on the i386. So this newer version of select() does 789 * this. 790 */ 791 int 792 linux_sys_select(p, v, retval) 793 struct proc *p; 794 void *v; 795 register_t *retval; 796 { 797 struct linux_sys_select_args /* { 798 syscallarg(int) nfds; 799 syscallarg(fd_set *) readfds; 800 syscallarg(fd_set *) writefds; 801 syscallarg(fd_set *) exceptfds; 802 syscallarg(struct timeval *) timeout; 803 } */ *uap = v; 804 805 return linux_select1(p, retval, SCARG(uap, nfds), SCARG(uap, readfds), 806 SCARG(uap, writefds), SCARG(uap, exceptfds), SCARG(uap, timeout)); 807 } 808 809 /* 810 * Common code for the old and new versions of select(). A couple of 811 * things are important: 812 * 1) return the amount of time left in the 'timeout' parameter 813 * 2) select never returns ERESTART on Linux, always return EINTR 814 */ 815 int 816 linux_select1(p, retval, nfds, readfds, writefds, exceptfds, timeout) 817 struct proc *p; 818 register_t *retval; 819 int nfds; 820 fd_set *readfds, *writefds, *exceptfds; 821 struct timeval *timeout; 822 { 823 struct sys_select_args bsa; 824 struct timeval tv0, tv1, utv, *tvp; 825 caddr_t sg; 826 int error; 827 828 SCARG(&bsa, nd) = nfds; 829 SCARG(&bsa, in) = readfds; 830 SCARG(&bsa, ou) = writefds; 831 SCARG(&bsa, ex) = exceptfds; 832 SCARG(&bsa, tv) = timeout; 833 834 /* 835 * Store current time for computation of the amount of 836 * time left. 837 */ 838 if (timeout) { 839 if ((error = copyin(timeout, &utv, sizeof(utv)))) 840 return error; 841 if (itimerfix(&utv)) { 842 /* 843 * The timeval was invalid. Convert it to something 844 * valid that will act as it does under Linux. 845 */ 846 sg = stackgap_init(p->p_emul); 847 tvp = stackgap_alloc(&sg, sizeof(utv)); 848 utv.tv_sec += utv.tv_usec / 1000000; 849 utv.tv_usec %= 1000000; 850 if (utv.tv_usec < 0) { 851 utv.tv_sec -= 1; 852 utv.tv_usec += 1000000; 853 } 854 if (utv.tv_sec < 0) 855 timerclear(&utv); 856 if ((error = copyout(&utv, tvp, sizeof(utv)))) 857 return error; 858 SCARG(&bsa, tv) = tvp; 859 } 860 microtime(&tv0); 861 } 862 863 error = sys_select(p, &bsa, retval); 864 if (error) { 865 /* 866 * See fs/select.c in the Linux kernel. Without this, 867 * Maelstrom doesn't work. 868 */ 869 if (error == ERESTART) 870 error = EINTR; 871 return error; 872 } 873 874 if (timeout) { 875 if (*retval) { 876 /* 877 * Compute how much time was left of the timeout, 878 * by subtracting the current time and the time 879 * before we started the call, and subtracting 880 * that result from the user-supplied value. 881 */ 882 microtime(&tv1); 883 timersub(&tv1, &tv0, &tv1); 884 timersub(&utv, &tv1, &utv); 885 if (utv.tv_sec < 0) 886 timerclear(&utv); 887 } else 888 timerclear(&utv); 889 if ((error = copyout(&utv, timeout, sizeof(utv)))) 890 return error; 891 } 892 893 return 0; 894 } 895 896 /* 897 * Get the process group of a certain process. Look it up 898 * and return the value. 899 */ 900 int 901 linux_sys_getpgid(p, v, retval) 902 struct proc *p; 903 void *v; 904 register_t *retval; 905 { 906 struct linux_sys_getpgid_args /* { 907 syscallarg(int) pid; 908 } */ *uap = v; 909 struct proc *targp; 910 911 if (SCARG(uap, pid) != 0 && SCARG(uap, pid) != p->p_pid) { 912 if ((targp = pfind(SCARG(uap, pid))) == 0) 913 return ESRCH; 914 } 915 else 916 targp = p; 917 918 retval[0] = targp->p_pgid; 919 return 0; 920 } 921 922 /* 923 * Set the 'personality' (emulation mode) for the current process. Only 924 * accept the Linux personality here (0). This call is needed because 925 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 926 * ELF binaries run in Linux mode, not SVR4 mode. 927 */ 928 int 929 linux_sys_personality(p, v, retval) 930 struct proc *p; 931 void *v; 932 register_t *retval; 933 { 934 struct linux_sys_personality_args /* { 935 syscallarg(int) per; 936 } */ *uap = v; 937 938 if (SCARG(uap, per) != 0) 939 return EINVAL; 940 retval[0] = 0; 941 return 0; 942 } 943 944 #if defined(__i386__) || defined(__m68k__) 945 /* 946 * The calls are here because of type conversions. 947 */ 948 int 949 linux_sys_setreuid16(p, v, retval) 950 struct proc *p; 951 void *v; 952 register_t *retval; 953 { 954 struct linux_sys_setreuid16_args /* { 955 syscallarg(int) ruid; 956 syscallarg(int) euid; 957 } */ *uap = v; 958 struct sys_setreuid_args bsa; 959 960 SCARG(&bsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 961 (uid_t)-1 : SCARG(uap, ruid); 962 SCARG(&bsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 963 (uid_t)-1 : SCARG(uap, euid); 964 965 return sys_setreuid(p, &bsa, retval); 966 } 967 968 int 969 linux_sys_setregid16(p, v, retval) 970 struct proc *p; 971 void *v; 972 register_t *retval; 973 { 974 struct linux_sys_setregid16_args /* { 975 syscallarg(int) rgid; 976 syscallarg(int) egid; 977 } */ *uap = v; 978 struct sys_setregid_args bsa; 979 980 SCARG(&bsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 981 (uid_t)-1 : SCARG(uap, rgid); 982 SCARG(&bsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 983 (uid_t)-1 : SCARG(uap, egid); 984 985 return sys_setregid(p, &bsa, retval); 986 } 987 988 int 989 linux_sys_setresuid16(p, v, retval) 990 struct proc *p; 991 void *v; 992 register_t *retval; 993 { 994 struct linux_sys_setresuid16_args /* { 995 syscallarg(uid_t) ruid; 996 syscallarg(uid_t) euid; 997 syscallarg(uid_t) suid; 998 } */ *uap = v; 999 struct linux_sys_setresuid16_args lsa; 1000 1001 SCARG(&lsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 1002 (uid_t)-1 : SCARG(uap, ruid); 1003 SCARG(&lsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 1004 (uid_t)-1 : SCARG(uap, euid); 1005 SCARG(&lsa, suid) = ((linux_uid_t)SCARG(uap, suid) == (linux_uid_t)-1) ? 1006 (uid_t)-1 : SCARG(uap, suid); 1007 1008 return linux_sys_setresuid(p, &lsa, retval); 1009 } 1010 1011 int 1012 linux_sys_setresgid16(p, v, retval) 1013 struct proc *p; 1014 void *v; 1015 register_t *retval; 1016 { 1017 struct linux_sys_setresgid16_args /* { 1018 syscallarg(gid_t) rgid; 1019 syscallarg(gid_t) egid; 1020 syscallarg(gid_t) sgid; 1021 } */ *uap = v; 1022 struct linux_sys_setresgid16_args lsa; 1023 1024 SCARG(&lsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 1025 (gid_t)-1 : SCARG(uap, rgid); 1026 SCARG(&lsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 1027 (gid_t)-1 : SCARG(uap, egid); 1028 SCARG(&lsa, sgid) = ((linux_gid_t)SCARG(uap, sgid) == (linux_gid_t)-1) ? 1029 (gid_t)-1 : SCARG(uap, sgid); 1030 1031 return linux_sys_setresgid(p, &lsa, retval); 1032 } 1033 1034 int 1035 linux_sys_getgroups16(p, v, retval) 1036 struct proc *p; 1037 void *v; 1038 register_t *retval; 1039 { 1040 struct linux_sys_getgroups16_args /* { 1041 syscallarg(int) gidsetsize; 1042 syscallarg(linux_gid_t *) gidset; 1043 } */ *uap = v; 1044 caddr_t sg; 1045 int n, error, i; 1046 struct sys_getgroups_args bsa; 1047 gid_t *bset, *kbset; 1048 linux_gid_t *lset; 1049 struct pcred *pc = p->p_cred; 1050 1051 n = SCARG(uap, gidsetsize); 1052 if (n < 0) 1053 return EINVAL; 1054 error = 0; 1055 bset = kbset = NULL; 1056 lset = NULL; 1057 if (n > 0) { 1058 n = min(pc->pc_ucred->cr_ngroups, n); 1059 sg = stackgap_init(p->p_emul); 1060 bset = stackgap_alloc(&sg, n * sizeof (gid_t)); 1061 kbset = malloc(n * sizeof (gid_t), M_TEMP, M_WAITOK); 1062 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1063 if (bset == NULL || kbset == NULL || lset == NULL) 1064 return ENOMEM; 1065 SCARG(&bsa, gidsetsize) = n; 1066 SCARG(&bsa, gidset) = bset; 1067 error = sys_getgroups(p, &bsa, retval); 1068 if (error != 0) 1069 goto out; 1070 error = copyin(bset, kbset, n * sizeof (gid_t)); 1071 if (error != 0) 1072 goto out; 1073 for (i = 0; i < n; i++) 1074 lset[i] = (linux_gid_t)kbset[i]; 1075 error = copyout(lset, SCARG(uap, gidset), 1076 n * sizeof (linux_gid_t)); 1077 } else 1078 *retval = pc->pc_ucred->cr_ngroups; 1079 out: 1080 if (kbset != NULL) 1081 free(kbset, M_TEMP); 1082 if (lset != NULL) 1083 free(lset, M_TEMP); 1084 return error; 1085 } 1086 1087 int 1088 linux_sys_setgroups16(p, v, retval) 1089 struct proc *p; 1090 void *v; 1091 register_t *retval; 1092 { 1093 struct linux_sys_setgroups16_args /* { 1094 syscallarg(int) gidsetsize; 1095 syscallarg(linux_gid_t *) gidset; 1096 } */ *uap = v; 1097 caddr_t sg; 1098 int n; 1099 int error, i; 1100 struct sys_setgroups_args bsa; 1101 gid_t *bset, *kbset; 1102 linux_gid_t *lset; 1103 1104 n = SCARG(uap, gidsetsize); 1105 if (n < 0 || n > NGROUPS) 1106 return EINVAL; 1107 sg = stackgap_init(p->p_emul); 1108 bset = stackgap_alloc(&sg, n * sizeof (gid_t)); 1109 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1110 kbset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1111 if (lset == NULL || bset == NULL) 1112 return ENOMEM; 1113 error = copyin(SCARG(uap, gidset), lset, n * sizeof (linux_gid_t)); 1114 if (error != 0) 1115 goto out; 1116 for (i = 0; i < n; i++) 1117 kbset[i] = (gid_t)lset[i]; 1118 error = copyout(kbset, bset, n * sizeof (gid_t)); 1119 if (error != 0) 1120 goto out; 1121 SCARG(&bsa, gidsetsize) = n; 1122 SCARG(&bsa, gidset) = bset; 1123 error = sys_setgroups(p, &bsa, retval); 1124 1125 out: 1126 if (lset != NULL) 1127 free(lset, M_TEMP); 1128 if (kbset != NULL) 1129 free(kbset, M_TEMP); 1130 1131 return error; 1132 } 1133 1134 #endif /* __i386__ || __m68k__ */ 1135 1136 /* 1137 * We have nonexistent fsuid equal to uid. 1138 * If modification is requested, refuse. 1139 */ 1140 int 1141 linux_sys_setfsuid(p, v, retval) 1142 struct proc *p; 1143 void *v; 1144 register_t *retval; 1145 { 1146 struct linux_sys_setfsuid_args /* { 1147 syscallarg(uid_t) uid; 1148 } */ *uap = v; 1149 uid_t uid; 1150 1151 uid = SCARG(uap, uid); 1152 if (p->p_cred->p_ruid != uid) 1153 return sys_nosys(p, v, retval); 1154 else 1155 return (0); 1156 } 1157 1158 /* XXX XXX XXX */ 1159 #ifndef alpha 1160 int 1161 linux_sys_getfsuid(p, v, retval) 1162 struct proc *p; 1163 void *v; 1164 register_t *retval; 1165 { 1166 return sys_getuid(p, v, retval); 1167 } 1168 #endif 1169 1170 int 1171 linux_sys_setresuid(p, v, retval) 1172 struct proc *p; 1173 void *v; 1174 register_t *retval; 1175 { 1176 struct linux_sys_setresuid_args /* { 1177 syscallarg(uid_t) ruid; 1178 syscallarg(uid_t) euid; 1179 syscallarg(uid_t) suid; 1180 } */ *uap = v; 1181 struct pcred *pc = p->p_cred; 1182 uid_t ruid, euid, suid; 1183 int error; 1184 1185 ruid = SCARG(uap, ruid); 1186 euid = SCARG(uap, euid); 1187 suid = SCARG(uap, suid); 1188 1189 /* 1190 * Note: These checks are a little different than the NetBSD 1191 * setreuid(2) call performs. This precisely follows the 1192 * behavior of the Linux kernel. 1193 */ 1194 if (ruid != (uid_t)-1 && 1195 ruid != pc->p_ruid && 1196 ruid != pc->pc_ucred->cr_uid && 1197 ruid != pc->p_svuid && 1198 (error = suser(pc->pc_ucred, &p->p_acflag))) 1199 return (error); 1200 1201 if (euid != (uid_t)-1 && 1202 euid != pc->p_ruid && 1203 euid != pc->pc_ucred->cr_uid && 1204 euid != pc->p_svuid && 1205 (error = suser(pc->pc_ucred, &p->p_acflag))) 1206 return (error); 1207 1208 if (suid != (uid_t)-1 && 1209 suid != pc->p_ruid && 1210 suid != pc->pc_ucred->cr_uid && 1211 suid != pc->p_svuid && 1212 (error = suser(pc->pc_ucred, &p->p_acflag))) 1213 return (error); 1214 1215 /* 1216 * Now assign the new real, effective, and saved UIDs. 1217 * Note that Linux, unlike NetBSD in setreuid(2), does not 1218 * set the saved UID in this call unless the user specifies 1219 * it. 1220 */ 1221 if (ruid != (uid_t)-1) { 1222 (void)chgproccnt(pc->p_ruid, -1); 1223 (void)chgproccnt(ruid, 1); 1224 pc->p_ruid = ruid; 1225 } 1226 1227 if (euid != (uid_t)-1) { 1228 pc->pc_ucred = crcopy(pc->pc_ucred); 1229 pc->pc_ucred->cr_uid = euid; 1230 } 1231 1232 if (suid != (uid_t)-1) 1233 pc->p_svuid = suid; 1234 1235 if (ruid != (uid_t)-1 && euid != (uid_t)-1 && suid != (uid_t)-1) 1236 p->p_flag |= P_SUGID; 1237 return (0); 1238 } 1239 1240 int 1241 linux_sys_getresuid(p, v, retval) 1242 struct proc *p; 1243 void *v; 1244 register_t *retval; 1245 { 1246 struct linux_sys_getresuid_args /* { 1247 syscallarg(uid_t *) ruid; 1248 syscallarg(uid_t *) euid; 1249 syscallarg(uid_t *) suid; 1250 } */ *uap = v; 1251 struct pcred *pc = p->p_cred; 1252 int error; 1253 1254 /* 1255 * Linux copies these values out to userspace like so: 1256 * 1257 * 1. Copy out ruid. 1258 * 2. If that succeeds, copy out euid. 1259 * 3. If both of those succeed, copy out suid. 1260 */ 1261 if ((error = copyout(&pc->p_ruid, SCARG(uap, ruid), 1262 sizeof(uid_t))) != 0) 1263 return (error); 1264 1265 if ((error = copyout(&pc->pc_ucred->cr_uid, SCARG(uap, euid), 1266 sizeof(uid_t))) != 0) 1267 return (error); 1268 1269 return (copyout(&pc->p_svuid, SCARG(uap, suid), sizeof(uid_t))); 1270 } 1271 1272 int 1273 linux_sys_ptrace(p, v, retval) 1274 struct proc *p; 1275 void *v; 1276 register_t *retval; 1277 { 1278 struct linux_sys_ptrace_args /* { 1279 i386, m68k, powerpc: T=int 1280 alpha: T=long 1281 syscallarg(T) request; 1282 syscallarg(T) pid; 1283 syscallarg(T) addr; 1284 syscallarg(T) data; 1285 } */ *uap = v; 1286 const int *ptr; 1287 int request; 1288 int error; 1289 1290 ptr = linux_ptrace_request_map; 1291 request = SCARG(uap, request); 1292 while (*ptr != -1) 1293 if (*ptr++ == request) { 1294 struct sys_ptrace_args pta; 1295 1296 SCARG(&pta, req) = *ptr; 1297 SCARG(&pta, pid) = SCARG(uap, pid); 1298 SCARG(&pta, addr) = (caddr_t)SCARG(uap, addr); 1299 SCARG(&pta, data) = SCARG(uap, data); 1300 1301 /* 1302 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1303 * to continue where the process left off previously. 1304 * The same thing is achieved by addr == (caddr_t) 1 1305 * on NetBSD, so rewrite 'addr' appropriately. 1306 */ 1307 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1308 SCARG(&pta, addr) = (caddr_t) 1; 1309 1310 error = sys_ptrace(p, &pta, retval); 1311 if (error) 1312 return error; 1313 switch (request) { 1314 case LINUX_PTRACE_PEEKTEXT: 1315 case LINUX_PTRACE_PEEKDATA: 1316 error = copyout (retval, 1317 (caddr_t)SCARG(uap, data), sizeof *retval); 1318 *retval = SCARG(uap, data); 1319 break; 1320 default: 1321 break; 1322 } 1323 return error; 1324 } 1325 else 1326 ptr++; 1327 1328 return LINUX_SYS_PTRACE_ARCH(p, uap, retval); 1329 } 1330 1331 int 1332 linux_sys_reboot(struct proc *p, void *v, register_t *retval) 1333 { 1334 struct linux_sys_reboot_args /* { 1335 syscallarg(int) magic1; 1336 syscallarg(int) magic2; 1337 syscallarg(int) cmd; 1338 syscallarg(void *) arg; 1339 } */ *uap = v; 1340 struct sys_reboot_args /* { 1341 syscallarg(int) opt; 1342 syscallarg(char *) bootstr; 1343 } */ sra; 1344 int error; 1345 1346 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1347 return(error); 1348 1349 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1350 return(EINVAL); 1351 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1352 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1353 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1354 return(EINVAL); 1355 1356 switch (SCARG(uap, cmd)) { 1357 case LINUX_REBOOT_CMD_RESTART: 1358 SCARG(&sra, opt) = RB_AUTOBOOT; 1359 break; 1360 case LINUX_REBOOT_CMD_HALT: 1361 SCARG(&sra, opt) = RB_HALT; 1362 break; 1363 case LINUX_REBOOT_CMD_POWER_OFF: 1364 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1365 break; 1366 case LINUX_REBOOT_CMD_RESTART2: 1367 /* Reboot with an argument. */ 1368 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1369 SCARG(&sra, bootstr) = SCARG(uap, arg); 1370 break; 1371 case LINUX_REBOOT_CMD_CAD_ON: 1372 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1373 case LINUX_REBOOT_CMD_CAD_OFF: 1374 return(0); 1375 default: 1376 return(EINVAL); 1377 } 1378 1379 return(sys_reboot(p, &sra, retval)); 1380 } 1381 1382 /* 1383 * Copy of compat_12_sys_swapon(). 1384 */ 1385 int 1386 linux_sys_swapon(p, v, retval) 1387 struct proc *p; 1388 void *v; 1389 register_t *retval; 1390 { 1391 struct sys_swapctl_args ua; 1392 struct linux_sys_swapon_args /* { 1393 syscallarg(const char *) name; 1394 } */ *uap = v; 1395 1396 SCARG(&ua, cmd) = SWAP_ON; 1397 SCARG(&ua, arg) = (void *)SCARG(uap, name); 1398 SCARG(&ua, misc) = 0; /* priority */ 1399 return (sys_swapctl(p, &ua, retval)); 1400 } 1401 1402 /* 1403 * Stop swapping to the file or block device specified by path. 1404 */ 1405 int 1406 linux_sys_swapoff(p, v, retval) 1407 struct proc *p; 1408 void *v; 1409 register_t *retval; 1410 { 1411 struct sys_swapctl_args ua; 1412 struct linux_sys_swapoff_args /* { 1413 syscallarg(const char *) path; 1414 } */ *uap = v; 1415 1416 SCARG(&ua, cmd) = SWAP_OFF; 1417 SCARG(&ua, arg) = (void *)SCARG(uap, path); 1418 return (sys_swapctl(p, &ua, retval)); 1419 } 1420 1421 /* 1422 * Copy of compat_09_sys_setdomainname() 1423 */ 1424 /* ARGSUSED */ 1425 int 1426 linux_sys_setdomainname(p, v, retval) 1427 struct proc *p; 1428 void *v; 1429 register_t *retval; 1430 { 1431 struct linux_sys_setdomainname_args /* { 1432 syscallarg(char *) domainname; 1433 syscallarg(int) len; 1434 } */ *uap = v; 1435 int name; 1436 int error; 1437 1438 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1439 return (error); 1440 name = KERN_DOMAINNAME; 1441 return (kern_sysctl(&name, 1, 0, 0, SCARG(uap, domainname), 1442 SCARG(uap, len), p)); 1443 } 1444 1445 /* 1446 * sysinfo() 1447 */ 1448 /* ARGSUSED */ 1449 int 1450 linux_sys_sysinfo(p, v, retval) 1451 struct proc *p; 1452 void *v; 1453 register_t *retval; 1454 { 1455 struct linux_sys_sysinfo_args /* { 1456 syscallarg(struct linux_sysinfo *) arg; 1457 } */ *uap = v; 1458 struct linux_sysinfo si; 1459 struct loadavg *la; 1460 1461 si.uptime = time.tv_sec - boottime.tv_sec; 1462 la = &averunnable; 1463 si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1464 si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1465 si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1466 si.totalram = ctob(physmem); 1467 si.freeram = uvmexp.free * uvmexp.pagesize; 1468 si.sharedram = 0; /* XXX */ 1469 si.bufferram = uvmexp.filepages * uvmexp.pagesize; 1470 si.totalswap = uvmexp.swpages * uvmexp.pagesize; 1471 si.freeswap = (uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize; 1472 si.procs = nprocs; 1473 1474 /* The following are only present in newer Linux kernels. */ 1475 si.totalbig = 0; 1476 si.freebig = 0; 1477 si.mem_unit = 1; 1478 1479 return (copyout(&si, SCARG(uap, arg), sizeof si)); 1480 } 1481 1482 #define bsd_to_linux_rlimit1(l, b, f) \ 1483 (l)->f = ((b)->f == RLIM_INFINITY || ((b)->f & 0xffffffff00000000) != 0) ? \ 1484 LINUX_RLIM_INFINITY : (int32_t)(b)->f 1485 #define bsd_to_linux_rlimit(l, b) \ 1486 bsd_to_linux_rlimit1(l, b, rlim_cur); \ 1487 bsd_to_linux_rlimit1(l, b, rlim_max) 1488 1489 #define linux_to_bsd_rlimit1(b, l, f) \ 1490 (b)->f = (l)->f == LINUX_RLIM_INFINITY ? RLIM_INFINITY : (b)->f 1491 #define linux_to_bsd_rlimit(b, l) \ 1492 linux_to_bsd_rlimit1(b, l, rlim_cur); \ 1493 linux_to_bsd_rlimit1(b, l, rlim_max) 1494 1495 static int 1496 linux_to_bsd_limit(lim) 1497 int lim; 1498 { 1499 switch (lim) { 1500 case LINUX_RLIMIT_CPU: 1501 return RLIMIT_CPU; 1502 case LINUX_RLIMIT_FSIZE: 1503 return RLIMIT_FSIZE; 1504 case LINUX_RLIMIT_DATA: 1505 return RLIMIT_DATA; 1506 case LINUX_RLIMIT_STACK: 1507 return RLIMIT_STACK; 1508 case LINUX_RLIMIT_CORE: 1509 return RLIMIT_CORE; 1510 case LINUX_RLIMIT_RSS: 1511 return RLIMIT_RSS; 1512 case LINUX_RLIMIT_NPROC: 1513 return RLIMIT_NPROC; 1514 case LINUX_RLIMIT_NOFILE: 1515 return RLIMIT_NOFILE; 1516 case LINUX_RLIMIT_MEMLOCK: 1517 return RLIMIT_MEMLOCK; 1518 case LINUX_RLIMIT_AS: 1519 case LINUX_RLIMIT_LOCKS: 1520 return -EOPNOTSUPP; 1521 default: 1522 return -EINVAL; 1523 } 1524 } 1525 1526 1527 int 1528 linux_sys_getrlimit(p, v, retval) 1529 struct proc *p; 1530 void *v; 1531 register_t *retval; 1532 { 1533 struct linux_sys_getrlimit_args /* { 1534 syscallarg(int) which; 1535 syscallarg(struct orlimit *) rlp; 1536 } */ *uap = v; 1537 caddr_t sg = stackgap_init(p->p_emul); 1538 struct sys_getrlimit_args ap; 1539 struct rlimit rl; 1540 struct orlimit orl; 1541 int error; 1542 1543 SCARG(&ap, which) = linux_to_bsd_limit(SCARG(uap, which)); 1544 if ((error = SCARG(&ap, which)) < 0) 1545 return -error; 1546 SCARG(&ap, rlp) = stackgap_alloc(&sg, sizeof rl); 1547 if ((error = sys_getrlimit(p, &ap, retval)) != 0) 1548 return error; 1549 if ((error = copyin(SCARG(&ap, rlp), &rl, sizeof(rl))) != 0) 1550 return error; 1551 bsd_to_linux_rlimit(&orl, &rl); 1552 return copyout(&orl, SCARG(uap, rlp), sizeof(orl)); 1553 } 1554 1555 int 1556 linux_sys_setrlimit(p, v, retval) 1557 struct proc *p; 1558 void *v; 1559 register_t *retval; 1560 { 1561 struct linux_sys_setrlimit_args /* { 1562 syscallarg(int) which; 1563 syscallarg(struct orlimit *) rlp; 1564 } */ *uap = v; 1565 caddr_t sg = stackgap_init(p->p_emul); 1566 struct sys_setrlimit_args ap; 1567 struct rlimit rl; 1568 struct orlimit orl; 1569 int error; 1570 1571 SCARG(&ap, which) = linux_to_bsd_limit(SCARG(uap, which)); 1572 SCARG(&ap, rlp) = stackgap_alloc(&sg, sizeof rl); 1573 if ((error = SCARG(&ap, which)) < 0) 1574 return -error; 1575 if ((error = copyin(SCARG(uap, rlp), &orl, sizeof(orl))) != 0) 1576 return error; 1577 linux_to_bsd_rlimit(&rl, &orl); 1578 /* XXX: alpha complains about this */ 1579 if ((error = copyout(&rl, (void *)SCARG(&ap, rlp), sizeof(rl))) != 0) 1580 return error; 1581 return sys_setrlimit(p, &ap, retval); 1582 } 1583 1584 #ifndef __mips__ 1585 /* XXX: this doesn't look 100% common, at least mips doesn't have it */ 1586 int 1587 linux_sys_ugetrlimit(p, v, retval) 1588 struct proc *p; 1589 void *v; 1590 register_t *retval; 1591 { 1592 return linux_sys_getrlimit(p, v, retval); 1593 } 1594 #endif 1595 1596 /* 1597 * This gets called for unsupported syscalls. The difference to sys_nosys() 1598 * is that process does not get SIGSYS, the call just returns with ENOSYS. 1599 * This is the way Linux does it and glibc depends on this behaviour. 1600 */ 1601 int 1602 linux_sys_nosys(p, v, retval) 1603 struct proc *p; 1604 void *v; 1605 register_t *retval; 1606 { 1607 return (ENOSYS); 1608 } 1609