linux_misc.c revision 1.83.2.8
1 /* $NetBSD: linux_misc.c,v 1.83.2.8 2002/02/28 04:12:56 nathanw 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 1.83.2.8 2002/02/28 04:12:56 nathanw Exp $"); 68 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/namei.h> 72 #include <sys/lwp.h> 73 #include <sys/proc.h> 74 #include <sys/dirent.h> 75 #include <sys/file.h> 76 #include <sys/stat.h> 77 #include <sys/filedesc.h> 78 #include <sys/ioctl.h> 79 #include <sys/kernel.h> 80 #include <sys/malloc.h> 81 #include <sys/mbuf.h> 82 #include <sys/mman.h> 83 #include <sys/mount.h> 84 #include <sys/reboot.h> 85 #include <sys/resource.h> 86 #include <sys/resourcevar.h> 87 #include <sys/signal.h> 88 #include <sys/signalvar.h> 89 #include <sys/socket.h> 90 #include <sys/time.h> 91 #include <sys/times.h> 92 #include <sys/vnode.h> 93 #include <sys/uio.h> 94 #include <sys/wait.h> 95 #include <sys/utsname.h> 96 #include <sys/unistd.h> 97 #include <sys/swap.h> /* for SWAP_ON */ 98 #include <sys/sysctl.h> /* for KERN_DOMAINNAME */ 99 100 #include <sys/ptrace.h> 101 #include <machine/ptrace.h> 102 103 #include <sys/syscallargs.h> 104 105 #include <compat/linux/common/linux_types.h> 106 #include <compat/linux/common/linux_signal.h> 107 108 #include <compat/linux/linux_syscallargs.h> 109 110 #include <compat/linux/common/linux_fcntl.h> 111 #include <compat/linux/common/linux_mmap.h> 112 #include <compat/linux/common/linux_dirent.h> 113 #include <compat/linux/common/linux_util.h> 114 #include <compat/linux/common/linux_misc.h> 115 #include <compat/linux/common/linux_ptrace.h> 116 #include <compat/linux/common/linux_reboot.h> 117 #include <compat/linux/common/linux_emuldata.h> 118 119 const int linux_ptrace_request_map[] = { 120 LINUX_PTRACE_TRACEME, PT_TRACE_ME, 121 LINUX_PTRACE_PEEKTEXT, PT_READ_I, 122 LINUX_PTRACE_PEEKDATA, PT_READ_D, 123 LINUX_PTRACE_POKETEXT, PT_WRITE_I, 124 LINUX_PTRACE_POKEDATA, PT_WRITE_D, 125 LINUX_PTRACE_CONT, PT_CONTINUE, 126 LINUX_PTRACE_KILL, PT_KILL, 127 LINUX_PTRACE_ATTACH, PT_ATTACH, 128 LINUX_PTRACE_DETACH, PT_DETACH, 129 #ifdef PT_STEP 130 LINUX_PTRACE_SINGLESTEP, PT_STEP, 131 #endif 132 -1 133 }; 134 135 const static struct mnttypes { 136 char *bsd; 137 int linux; 138 } fstypes[] = { 139 { MOUNT_FFS, LINUX_DEFAULT_SUPER_MAGIC }, 140 { MOUNT_NFS, LINUX_NFS_SUPER_MAGIC }, 141 { MOUNT_MFS, LINUX_DEFAULT_SUPER_MAGIC }, 142 { MOUNT_MSDOS, LINUX_MSDOS_SUPER_MAGIC }, 143 { MOUNT_LFS, LINUX_DEFAULT_SUPER_MAGIC }, 144 { MOUNT_FDESC, LINUX_DEFAULT_SUPER_MAGIC }, 145 { MOUNT_PORTAL, LINUX_DEFAULT_SUPER_MAGIC }, 146 { MOUNT_NULL, LINUX_DEFAULT_SUPER_MAGIC }, 147 { MOUNT_OVERLAY, LINUX_DEFAULT_SUPER_MAGIC }, 148 { MOUNT_UMAP, LINUX_DEFAULT_SUPER_MAGIC }, 149 { MOUNT_KERNFS, LINUX_DEFAULT_SUPER_MAGIC }, 150 { MOUNT_PROCFS, LINUX_PROC_SUPER_MAGIC }, 151 { MOUNT_AFS, LINUX_DEFAULT_SUPER_MAGIC }, 152 { MOUNT_CD9660, LINUX_ISOFS_SUPER_MAGIC }, 153 { MOUNT_UNION, LINUX_DEFAULT_SUPER_MAGIC }, 154 { MOUNT_ADOSFS, LINUX_ADFS_SUPER_MAGIC }, 155 { MOUNT_EXT2FS, LINUX_EXT2_SUPER_MAGIC }, 156 { MOUNT_CFS, LINUX_DEFAULT_SUPER_MAGIC }, 157 { MOUNT_CODA, LINUX_CODA_SUPER_MAGIC }, 158 { MOUNT_FILECORE, LINUX_DEFAULT_SUPER_MAGIC }, 159 { MOUNT_NTFS, LINUX_DEFAULT_SUPER_MAGIC }, 160 { MOUNT_SMBFS, LINUX_SMB_SUPER_MAGIC } 161 }; 162 #define FSTYPESSIZE (sizeof(fstypes) / sizeof(fstypes[0])) 163 164 /* Local linux_misc.c functions: */ 165 static void bsd_to_linux_statfs __P((struct statfs *, struct linux_statfs *)); 166 static int linux_to_bsd_limit __P((int)); 167 168 /* 169 * The information on a terminated (or stopped) process needs 170 * to be converted in order for Linux binaries to get a valid signal 171 * number out of it. 172 */ 173 void 174 bsd_to_linux_wstat(st) 175 int *st; 176 { 177 178 int sig; 179 180 if (WIFSIGNALED(*st)) { 181 sig = WTERMSIG(*st); 182 if (sig >= 0 && sig < NSIG) 183 *st= (*st& ~0177) | native_to_linux_sig[sig]; 184 } else if (WIFSTOPPED(*st)) { 185 sig = WSTOPSIG(*st); 186 if (sig >= 0 && sig < NSIG) 187 *st = (*st & ~0xff00) | (native_to_linux_sig[sig] << 8); 188 } 189 } 190 191 /* 192 * This is very much the same as waitpid() 193 */ 194 int 195 linux_sys_wait4(l, v, retval) 196 struct lwp *l; 197 void *v; 198 register_t *retval; 199 { 200 struct linux_sys_wait4_args /* { 201 syscallarg(int) pid; 202 syscallarg(int *) status; 203 syscallarg(int) options; 204 syscallarg(struct rusage *) rusage; 205 } */ *uap = v; 206 struct proc *p = l->l_proc; 207 struct sys_wait4_args w4a; 208 int error, *status, tstat, options, linux_options; 209 caddr_t sg; 210 211 if (SCARG(uap, status) != NULL) { 212 sg = stackgap_init(p->p_emul); 213 status = (int *) stackgap_alloc(&sg, sizeof *status); 214 } else 215 status = NULL; 216 217 linux_options = SCARG(uap, options); 218 options = 0; 219 if (linux_options & 220 ~(LINUX_WAIT4_WNOHANG|LINUX_WAIT4_WUNTRACED|LINUX_WAIT4_WALL| 221 LINUX_WAIT4_WCLONE)) 222 return (EINVAL); 223 224 if (linux_options & LINUX_WAIT4_WNOHANG) 225 options |= WNOHANG; 226 if (linux_options & LINUX_WAIT4_WUNTRACED) 227 options |= WUNTRACED; 228 if (linux_options & LINUX_WAIT4_WALL) 229 options |= WALLSIG; 230 if (linux_options & LINUX_WAIT4_WCLONE) 231 options |= WALTSIG; 232 233 SCARG(&w4a, pid) = SCARG(uap, pid); 234 SCARG(&w4a, status) = status; 235 SCARG(&w4a, options) = options; 236 SCARG(&w4a, rusage) = SCARG(uap, rusage); 237 238 if ((error = sys_wait4(l, &w4a, retval))) 239 return error; 240 241 sigdelset(&p->p_sigctx.ps_siglist, SIGCHLD); 242 243 if (status != NULL) { 244 if ((error = copyin(status, &tstat, sizeof tstat))) 245 return error; 246 247 bsd_to_linux_wstat(&tstat); 248 return copyout(&tstat, SCARG(uap, status), sizeof tstat); 249 } 250 251 return 0; 252 } 253 254 /* 255 * Linux brk(2). The check if the new address is >= the old one is 256 * done in the kernel in Linux. NetBSD does it in the library. 257 */ 258 int 259 linux_sys_brk(l, v, retval) 260 struct lwp *l; 261 void *v; 262 register_t *retval; 263 { 264 struct linux_sys_brk_args /* { 265 syscallarg(char *) nsize; 266 } */ *uap = v; 267 struct proc *p = l->l_proc; 268 char *nbrk = SCARG(uap, nsize); 269 struct sys_obreak_args oba; 270 struct vmspace *vm = p->p_vmspace; 271 struct linux_emuldata *ed = (struct linux_emuldata*)p->p_emuldata; 272 273 SCARG(&oba, nsize) = nbrk; 274 275 if ((caddr_t) nbrk > vm->vm_daddr && sys_obreak(l, &oba, retval) == 0) 276 ed->p_break = (char *)nbrk; 277 else 278 nbrk = ed->p_break; 279 280 retval[0] = (register_t)nbrk; 281 return 0; 282 } 283 284 /* 285 * Convert BSD statfs structure to Linux statfs structure. 286 * The Linux structure has less fields, and it also wants 287 * the length of a name in a dir entry in a field, which 288 * we fake (probably the wrong way). 289 */ 290 static void 291 bsd_to_linux_statfs(bsp, lsp) 292 struct statfs *bsp; 293 struct linux_statfs *lsp; 294 { 295 int i; 296 297 for (i = 0; i < FSTYPESSIZE; i++) 298 if (strcmp(bsp->f_fstypename, fstypes[i].bsd) == 0) 299 break; 300 301 if (i == FSTYPESSIZE) { 302 #ifdef DIAGNOSTIC 303 printf("unhandled fstype in linux emulation: %s\n", 304 bsp->f_fstypename); 305 #endif 306 lsp->l_ftype = LINUX_DEFAULT_SUPER_MAGIC; 307 } else { 308 lsp->l_ftype = fstypes[i].linux; 309 } 310 311 lsp->l_fbsize = bsp->f_bsize; 312 lsp->l_fblocks = bsp->f_blocks; 313 lsp->l_fbfree = bsp->f_bfree; 314 lsp->l_fbavail = bsp->f_bavail; 315 lsp->l_ffiles = bsp->f_files; 316 lsp->l_fffree = bsp->f_ffree; 317 /* Linux sets the fsid to 0..., we don't */ 318 lsp->l_ffsid.val[0] = bsp->f_fsid.val[0]; 319 lsp->l_ffsid.val[1] = bsp->f_fsid.val[1]; 320 lsp->l_fnamelen = MAXNAMLEN; /* XXX */ 321 (void)memset(lsp->l_fspare, 0, sizeof(lsp->l_fspare)); 322 } 323 324 /* 325 * Implement the fs stat functions. Straightforward. 326 */ 327 int 328 linux_sys_statfs(l, v, retval) 329 struct lwp *l; 330 void *v; 331 register_t *retval; 332 { 333 struct linux_sys_statfs_args /* { 334 syscallarg(const char *) path; 335 syscallarg(struct linux_statfs *) sp; 336 } */ *uap = v; 337 struct proc *p = l->l_proc; 338 struct statfs btmp, *bsp; 339 struct linux_statfs ltmp; 340 struct sys_statfs_args bsa; 341 caddr_t sg; 342 int error; 343 344 sg = stackgap_init(p->p_emul); 345 bsp = (struct statfs *) stackgap_alloc(&sg, sizeof (struct statfs)); 346 347 CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); 348 349 SCARG(&bsa, path) = SCARG(uap, path); 350 SCARG(&bsa, buf) = bsp; 351 352 if ((error = sys_statfs(l, &bsa, retval))) 353 return error; 354 355 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 356 return error; 357 358 bsd_to_linux_statfs(&btmp, <mp); 359 360 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 361 } 362 363 int 364 linux_sys_fstatfs(l, v, retval) 365 struct lwp *l; 366 void *v; 367 register_t *retval; 368 { 369 struct linux_sys_fstatfs_args /* { 370 syscallarg(int) fd; 371 syscallarg(struct linux_statfs *) sp; 372 } */ *uap = v; 373 struct proc *p = l->l_proc; 374 struct statfs btmp, *bsp; 375 struct linux_statfs ltmp; 376 struct sys_fstatfs_args bsa; 377 caddr_t sg; 378 int error; 379 380 sg = stackgap_init(p->p_emul); 381 bsp = (struct statfs *) stackgap_alloc(&sg, sizeof (struct statfs)); 382 383 SCARG(&bsa, fd) = SCARG(uap, fd); 384 SCARG(&bsa, buf) = bsp; 385 386 if ((error = sys_fstatfs(l, &bsa, retval))) 387 return error; 388 389 if ((error = copyin((caddr_t) bsp, (caddr_t) &btmp, sizeof btmp))) 390 return error; 391 392 bsd_to_linux_statfs(&btmp, <mp); 393 394 return copyout((caddr_t) <mp, (caddr_t) SCARG(uap, sp), sizeof ltmp); 395 } 396 397 /* 398 * uname(). Just copy the info from the various strings stored in the 399 * kernel, and put it in the Linux utsname structure. That structure 400 * is almost the same as the NetBSD one, only it has fields 65 characters 401 * long, and an extra domainname field. 402 */ 403 int 404 linux_sys_uname(l, v, retval) 405 struct lwp *l; 406 void *v; 407 register_t *retval; 408 { 409 struct linux_sys_uname_args /* { 410 syscallarg(struct linux_utsname *) up; 411 } */ *uap = v; 412 struct linux_utsname luts; 413 414 strncpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); 415 strncpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); 416 strncpy(luts.l_release, linux_release, sizeof(luts.l_release)); 417 strncpy(luts.l_version, linux_version, sizeof(luts.l_version)); 418 strncpy(luts.l_machine, machine, sizeof(luts.l_machine)); 419 strncpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); 420 421 return copyout(&luts, SCARG(uap, up), sizeof(luts)); 422 } 423 424 /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ 425 /* Used indirectly on: arm, i386, m68k */ 426 427 /* 428 * New type Linux mmap call. 429 * Only called directly on machines with >= 6 free regs. 430 */ 431 int 432 linux_sys_mmap(l, v, retval) 433 struct lwp *l; 434 void *v; 435 register_t *retval; 436 { 437 struct linux_sys_mmap_args /* { 438 syscallarg(unsigned long) addr; 439 syscallarg(size_t) len; 440 syscallarg(int) prot; 441 syscallarg(int) flags; 442 syscallarg(int) fd; 443 syscallarg(linux_off_t) offset; 444 } */ *uap = v; 445 struct sys_mmap_args cma; 446 int flags; 447 448 flags = 0; 449 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_SHARED, MAP_SHARED); 450 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_PRIVATE, MAP_PRIVATE); 451 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_FIXED, MAP_FIXED); 452 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_ANON, MAP_ANON); 453 /* XXX XAX ERH: Any other flags here? There are more defined... */ 454 455 SCARG(&cma,addr) = (void *)SCARG(uap, addr); 456 SCARG(&cma,len) = SCARG(uap, len); 457 SCARG(&cma,prot) = SCARG(uap, prot); 458 if (SCARG(&cma,prot) & VM_PROT_WRITE) /* XXX */ 459 SCARG(&cma,prot) |= VM_PROT_READ; 460 SCARG(&cma,flags) = flags; 461 SCARG(&cma,fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 462 SCARG(&cma,pad) = 0; 463 SCARG(&cma,pos) = (off_t)SCARG(uap, offset); 464 465 return sys_mmap(l, &cma, retval); 466 } 467 468 /* 469 * Newer type Linux mmap call. 470 */ 471 int 472 linux_sys_mmap2(l, v, retval) 473 struct lwp *l; 474 void *v; 475 register_t *retval; 476 { 477 struct linux_sys_mmap2_args /* { 478 syscallarg(void *) addr; 479 syscallarg(size_t) len; 480 syscallarg(int) prot; 481 syscallarg(int) flags; 482 syscallarg(int) fd; 483 syscallarg(off_t) offset; 484 } */ *uap = v; 485 struct sys_mmap_args cma; 486 int flags; 487 488 flags = 0; 489 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_SHARED, MAP_SHARED); 490 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_PRIVATE, MAP_PRIVATE); 491 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_FIXED, MAP_FIXED); 492 flags |= cvtto_bsd_mask(SCARG(uap,flags), LINUX_MAP_ANON, MAP_ANON); 493 /* XXX XAX ERH: Any other flags here? There are more defined... */ 494 495 SCARG(&cma,addr) = (void *)SCARG(uap, addr); 496 SCARG(&cma,len) = SCARG(uap, len); 497 SCARG(&cma,prot) = SCARG(uap, prot); 498 if (SCARG(&cma,prot) & VM_PROT_WRITE) /* XXX */ 499 SCARG(&cma,prot) |= VM_PROT_READ; 500 SCARG(&cma,flags) = flags; 501 SCARG(&cma,fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); 502 SCARG(&cma,pos) = (off_t)SCARG(uap, offset); 503 504 return sys_mmap(l, &cma, retval); 505 } 506 507 int 508 linux_sys_mremap(l, v, retval) 509 struct lwp *l; 510 void *v; 511 register_t *retval; 512 { 513 struct linux_sys_mremap_args /* { 514 syscallarg(void *) old_address; 515 syscallarg(size_t) old_size; 516 syscallarg(size_t) new_size; 517 syscallarg(u_long) flags; 518 } */ *uap = v; 519 struct sys_munmap_args mua; 520 size_t old_size, new_size; 521 int error; 522 523 old_size = round_page(SCARG(uap, old_size)); 524 new_size = round_page(SCARG(uap, new_size)); 525 526 /* 527 * Growing mapped region. 528 */ 529 if (new_size > old_size) { 530 /* 531 * XXX Implement me. What we probably want to do is 532 * XXX dig out the guts of the old mapping, mmap that 533 * XXX object again with the new size, then munmap 534 * XXX the old mapping. 535 */ 536 *retval = 0; 537 return (ENOMEM); 538 } 539 540 /* 541 * Shrinking mapped region. 542 */ 543 if (new_size < old_size) { 544 SCARG(&mua, addr) = (caddr_t)SCARG(uap, old_address) + 545 new_size; 546 SCARG(&mua, len) = old_size - new_size; 547 error = sys_munmap(l, &mua, retval); 548 *retval = error ? 0 : (register_t)SCARG(uap, old_address); 549 return (error); 550 } 551 552 /* 553 * No change. 554 */ 555 *retval = (register_t)SCARG(uap, old_address); 556 return (0); 557 } 558 559 int 560 linux_sys_msync(l, v, retval) 561 struct lwp *l; 562 void *v; 563 register_t *retval; 564 { 565 struct linux_sys_msync_args /* { 566 syscallarg(caddr_t) addr; 567 syscallarg(int) len; 568 syscallarg(int) fl; 569 } */ *uap = v; 570 571 struct sys___msync13_args bma; 572 573 /* flags are ignored */ 574 SCARG(&bma, addr) = SCARG(uap, addr); 575 SCARG(&bma, len) = SCARG(uap, len); 576 SCARG(&bma, flags) = SCARG(uap, fl); 577 578 return sys___msync13(l, &bma, retval); 579 } 580 581 /* 582 * This code is partly stolen from src/lib/libc/compat-43/times.c 583 * XXX - CLK_TCK isn't declared in /sys, just in <time.h>, done here 584 */ 585 586 #define CLK_TCK 100 587 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK)) 588 589 int 590 linux_sys_times(l, v, retval) 591 struct lwp *l; 592 void *v; 593 register_t *retval; 594 { 595 struct linux_sys_times_args /* { 596 syscallarg(struct times *) tms; 597 } */ *uap = v; 598 struct proc *p = l->l_proc; 599 struct timeval t; 600 struct linux_tms ltms; 601 struct rusage ru; 602 int error, s; 603 604 calcru(p, &ru.ru_utime, &ru.ru_stime, NULL); 605 ltms.ltms_utime = CONVTCK(ru.ru_utime); 606 ltms.ltms_stime = CONVTCK(ru.ru_stime); 607 608 ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); 609 ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); 610 611 if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) 612 return error; 613 614 s = splclock(); 615 timersub(&time, &boottime, &t); 616 splx(s); 617 618 retval[0] = ((linux_clock_t)(CONVTCK(t))); 619 return 0; 620 } 621 622 /* 623 * Linux 'readdir' call. This code is mostly taken from the 624 * SunOS getdents call (see compat/sunos/sunos_misc.c), though 625 * an attempt has been made to keep it a little cleaner (failing 626 * miserably, because of the cruft needed if count 1 is passed). 627 * 628 * The d_off field should contain the offset of the next valid entry, 629 * but in Linux it has the offset of the entry itself. We emulate 630 * that bug here. 631 * 632 * Read in BSD-style entries, convert them, and copy them out. 633 * 634 * Note that this doesn't handle union-mounted filesystems. 635 */ 636 int 637 linux_sys_getdents(l, v, retval) 638 struct lwp *l; 639 void *v; 640 register_t *retval; 641 { 642 struct linux_sys_getdents_args /* { 643 syscallarg(int) fd; 644 syscallarg(struct linux_dirent *) dent; 645 syscallarg(unsigned int) count; 646 } */ *uap = v; 647 struct proc *p = l->l_proc; 648 struct dirent *bdp; 649 struct vnode *vp; 650 caddr_t inp, buf; /* BSD-format */ 651 int len, reclen; /* BSD-format */ 652 caddr_t outp; /* Linux-format */ 653 int resid, linux_reclen = 0; /* Linux-format */ 654 struct file *fp; 655 struct uio auio; 656 struct iovec aiov; 657 struct linux_dirent idb; 658 off_t off; /* true file offset */ 659 int buflen, error, eofflag, nbytes, oldcall; 660 struct vattr va; 661 off_t *cookiebuf = NULL, *cookie; 662 int ncookies; 663 664 /* getvnode() will use the descriptor for us */ 665 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 666 return (error); 667 668 if ((fp->f_flag & FREAD) == 0) { 669 error = EBADF; 670 goto out1; 671 } 672 673 vp = (struct vnode *)fp->f_data; 674 if (vp->v_type != VDIR) { 675 error = EINVAL; 676 goto out1; 677 } 678 679 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) 680 goto out1; 681 682 nbytes = SCARG(uap, count); 683 if (nbytes == 1) { /* emulating old, broken behaviour */ 684 nbytes = sizeof (struct linux_dirent); 685 buflen = max(va.va_blocksize, nbytes); 686 oldcall = 1; 687 } else { 688 buflen = min(MAXBSIZE, nbytes); 689 if (buflen < va.va_blocksize) 690 buflen = va.va_blocksize; 691 oldcall = 0; 692 } 693 buf = malloc(buflen, M_TEMP, M_WAITOK); 694 695 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 696 off = fp->f_offset; 697 again: 698 aiov.iov_base = buf; 699 aiov.iov_len = buflen; 700 auio.uio_iov = &aiov; 701 auio.uio_iovcnt = 1; 702 auio.uio_rw = UIO_READ; 703 auio.uio_segflg = UIO_SYSSPACE; 704 auio.uio_procp = p; 705 auio.uio_resid = buflen; 706 auio.uio_offset = off; 707 /* 708 * First we read into the malloc'ed buffer, then 709 * we massage it into user space, one record at a time. 710 */ 711 error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, 712 &ncookies); 713 if (error) 714 goto out; 715 716 inp = buf; 717 outp = (caddr_t)SCARG(uap, dent); 718 resid = nbytes; 719 if ((len = buflen - auio.uio_resid) == 0) 720 goto eof; 721 722 for (cookie = cookiebuf; len > 0; len -= reclen) { 723 bdp = (struct dirent *)inp; 724 reclen = bdp->d_reclen; 725 if (reclen & 3) 726 panic("linux_readdir"); 727 if (bdp->d_fileno == 0) { 728 inp += reclen; /* it is a hole; squish it out */ 729 off = *cookie++; 730 continue; 731 } 732 linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); 733 if (reclen > len || resid < linux_reclen) { 734 /* entry too big for buffer, so just stop */ 735 outp++; 736 break; 737 } 738 /* 739 * Massage in place to make a Linux-shaped dirent (otherwise 740 * we have to worry about touching user memory outside of 741 * the copyout() call). 742 */ 743 idb.d_ino = (linux_ino_t)bdp->d_fileno; 744 /* 745 * The old readdir() call misuses the offset and reclen fields. 746 */ 747 if (oldcall) { 748 idb.d_off = (linux_off_t)linux_reclen; 749 idb.d_reclen = (u_short)bdp->d_namlen; 750 } else { 751 if (sizeof (linux_off_t) < 4 && (off >> 32) != 0) { 752 compat_offseterr(vp, "linux_getdents"); 753 error = EINVAL; 754 goto out; 755 } 756 idb.d_off = (linux_off_t)off; 757 idb.d_reclen = (u_short)linux_reclen; 758 } 759 strcpy(idb.d_name, bdp->d_name); 760 if ((error = copyout((caddr_t)&idb, outp, linux_reclen))) 761 goto out; 762 /* advance past this real entry */ 763 inp += reclen; 764 off = *cookie++; /* each entry points to itself */ 765 /* advance output past Linux-shaped entry */ 766 outp += linux_reclen; 767 resid -= linux_reclen; 768 if (oldcall) 769 break; 770 } 771 772 /* if we squished out the whole block, try again */ 773 if (outp == (caddr_t)SCARG(uap, dent)) 774 goto again; 775 fp->f_offset = off; /* update the vnode offset */ 776 777 if (oldcall) 778 nbytes = resid + linux_reclen; 779 780 eof: 781 *retval = nbytes - resid; 782 out: 783 VOP_UNLOCK(vp, 0); 784 if (cookiebuf) 785 free(cookiebuf, M_TEMP); 786 free(buf, M_TEMP); 787 out1: 788 FILE_UNUSE(fp, p); 789 return error; 790 } 791 792 /* 793 * Even when just using registers to pass arguments to syscalls you can 794 * have 5 of them on the i386. So this newer version of select() does 795 * this. 796 */ 797 int 798 linux_sys_select(l, v, retval) 799 struct lwp *l; 800 void *v; 801 register_t *retval; 802 { 803 struct linux_sys_select_args /* { 804 syscallarg(int) nfds; 805 syscallarg(fd_set *) readfds; 806 syscallarg(fd_set *) writefds; 807 syscallarg(fd_set *) exceptfds; 808 syscallarg(struct timeval *) timeout; 809 } */ *uap = v; 810 811 return linux_select1(l, retval, SCARG(uap, nfds), SCARG(uap, readfds), 812 SCARG(uap, writefds), SCARG(uap, exceptfds), SCARG(uap, timeout)); 813 } 814 815 /* 816 * Common code for the old and new versions of select(). A couple of 817 * things are important: 818 * 1) return the amount of time left in the 'timeout' parameter 819 * 2) select never returns ERESTART on Linux, always return EINTR 820 */ 821 int 822 linux_select1(l, retval, nfds, readfds, writefds, exceptfds, timeout) 823 struct lwp *l; 824 register_t *retval; 825 int nfds; 826 fd_set *readfds, *writefds, *exceptfds; 827 struct timeval *timeout; 828 { 829 struct sys_select_args bsa; 830 struct proc *p = l->l_proc; 831 struct timeval tv0, tv1, utv, *tvp; 832 caddr_t sg; 833 int error; 834 835 SCARG(&bsa, nd) = nfds; 836 SCARG(&bsa, in) = readfds; 837 SCARG(&bsa, ou) = writefds; 838 SCARG(&bsa, ex) = exceptfds; 839 SCARG(&bsa, tv) = timeout; 840 841 /* 842 * Store current time for computation of the amount of 843 * time left. 844 */ 845 if (timeout) { 846 if ((error = copyin(timeout, &utv, sizeof(utv)))) 847 return error; 848 if (itimerfix(&utv)) { 849 /* 850 * The timeval was invalid. Convert it to something 851 * valid that will act as it does under Linux. 852 */ 853 sg = stackgap_init(p->p_emul); 854 tvp = stackgap_alloc(&sg, sizeof(utv)); 855 utv.tv_sec += utv.tv_usec / 1000000; 856 utv.tv_usec %= 1000000; 857 if (utv.tv_usec < 0) { 858 utv.tv_sec -= 1; 859 utv.tv_usec += 1000000; 860 } 861 if (utv.tv_sec < 0) 862 timerclear(&utv); 863 if ((error = copyout(&utv, tvp, sizeof(utv)))) 864 return error; 865 SCARG(&bsa, tv) = tvp; 866 } 867 microtime(&tv0); 868 } 869 870 error = sys_select(l, &bsa, retval); 871 if (error) { 872 /* 873 * See fs/select.c in the Linux kernel. Without this, 874 * Maelstrom doesn't work. 875 */ 876 if (error == ERESTART) 877 error = EINTR; 878 return error; 879 } 880 881 if (timeout) { 882 if (*retval) { 883 /* 884 * Compute how much time was left of the timeout, 885 * by subtracting the current time and the time 886 * before we started the call, and subtracting 887 * that result from the user-supplied value. 888 */ 889 microtime(&tv1); 890 timersub(&tv1, &tv0, &tv1); 891 timersub(&utv, &tv1, &utv); 892 if (utv.tv_sec < 0) 893 timerclear(&utv); 894 } else 895 timerclear(&utv); 896 if ((error = copyout(&utv, timeout, sizeof(utv)))) 897 return error; 898 } 899 900 return 0; 901 } 902 903 /* 904 * Get the process group of a certain process. Look it up 905 * and return the value. 906 */ 907 int 908 linux_sys_getpgid(l, v, retval) 909 struct lwp *l; 910 void *v; 911 register_t *retval; 912 { 913 struct linux_sys_getpgid_args /* { 914 syscallarg(int) pid; 915 } */ *uap = v; 916 struct proc *p = l->l_proc; 917 struct proc *targp; 918 919 if (SCARG(uap, pid) != 0 && SCARG(uap, pid) != p->p_pid) { 920 if ((targp = pfind(SCARG(uap, pid))) == 0) 921 return ESRCH; 922 } 923 else 924 targp = p; 925 926 retval[0] = targp->p_pgid; 927 return 0; 928 } 929 930 /* 931 * Set the 'personality' (emulation mode) for the current process. Only 932 * accept the Linux personality here (0). This call is needed because 933 * the Linux ELF crt0 issues it in an ugly kludge to make sure that 934 * ELF binaries run in Linux mode, not SVR4 mode. 935 */ 936 int 937 linux_sys_personality(l, v, retval) 938 struct lwp *l; 939 void *v; 940 register_t *retval; 941 { 942 struct linux_sys_personality_args /* { 943 syscallarg(int) per; 944 } */ *uap = v; 945 946 if (SCARG(uap, per) != 0) 947 return EINVAL; 948 retval[0] = 0; 949 return 0; 950 } 951 952 #if defined(__i386__) || defined(__m68k__) 953 /* 954 * The calls are here because of type conversions. 955 */ 956 int 957 linux_sys_setreuid16(l, v, retval) 958 struct lwp *l; 959 void *v; 960 register_t *retval; 961 { 962 struct linux_sys_setreuid16_args /* { 963 syscallarg(int) ruid; 964 syscallarg(int) euid; 965 } */ *uap = v; 966 struct sys_setreuid_args bsa; 967 968 SCARG(&bsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 969 (uid_t)-1 : SCARG(uap, ruid); 970 SCARG(&bsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 971 (uid_t)-1 : SCARG(uap, euid); 972 973 return sys_setreuid(l, &bsa, retval); 974 } 975 976 int 977 linux_sys_setregid16(l, v, retval) 978 struct lwp *l; 979 void *v; 980 register_t *retval; 981 { 982 struct linux_sys_setregid16_args /* { 983 syscallarg(int) rgid; 984 syscallarg(int) egid; 985 } */ *uap = v; 986 struct sys_setregid_args bsa; 987 988 SCARG(&bsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 989 (uid_t)-1 : SCARG(uap, rgid); 990 SCARG(&bsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 991 (uid_t)-1 : SCARG(uap, egid); 992 993 return sys_setregid(l, &bsa, retval); 994 } 995 996 int 997 linux_sys_setresuid16(l, v, retval) 998 struct lwp *l; 999 void *v; 1000 register_t *retval; 1001 { 1002 struct linux_sys_setresuid16_args /* { 1003 syscallarg(uid_t) ruid; 1004 syscallarg(uid_t) euid; 1005 syscallarg(uid_t) suid; 1006 } */ *uap = v; 1007 struct linux_sys_setresuid16_args lsa; 1008 1009 SCARG(&lsa, ruid) = ((linux_uid_t)SCARG(uap, ruid) == (linux_uid_t)-1) ? 1010 (uid_t)-1 : SCARG(uap, ruid); 1011 SCARG(&lsa, euid) = ((linux_uid_t)SCARG(uap, euid) == (linux_uid_t)-1) ? 1012 (uid_t)-1 : SCARG(uap, euid); 1013 SCARG(&lsa, suid) = ((linux_uid_t)SCARG(uap, suid) == (linux_uid_t)-1) ? 1014 (uid_t)-1 : SCARG(uap, suid); 1015 1016 return linux_sys_setresuid(l, &lsa, retval); 1017 } 1018 1019 int 1020 linux_sys_setresgid16(l, v, retval) 1021 struct lwp *l; 1022 void *v; 1023 register_t *retval; 1024 { 1025 struct linux_sys_setresgid16_args /* { 1026 syscallarg(gid_t) rgid; 1027 syscallarg(gid_t) egid; 1028 syscallarg(gid_t) sgid; 1029 } */ *uap = v; 1030 struct linux_sys_setresgid16_args lsa; 1031 1032 SCARG(&lsa, rgid) = ((linux_gid_t)SCARG(uap, rgid) == (linux_gid_t)-1) ? 1033 (gid_t)-1 : SCARG(uap, rgid); 1034 SCARG(&lsa, egid) = ((linux_gid_t)SCARG(uap, egid) == (linux_gid_t)-1) ? 1035 (gid_t)-1 : SCARG(uap, egid); 1036 SCARG(&lsa, sgid) = ((linux_gid_t)SCARG(uap, sgid) == (linux_gid_t)-1) ? 1037 (gid_t)-1 : SCARG(uap, sgid); 1038 1039 return linux_sys_setresgid(l, &lsa, retval); 1040 } 1041 1042 int 1043 linux_sys_getgroups16(l, v, retval) 1044 struct lwp *l; 1045 void *v; 1046 register_t *retval; 1047 { 1048 struct linux_sys_getgroups16_args /* { 1049 syscallarg(int) gidsetsize; 1050 syscallarg(linux_gid_t *) gidset; 1051 } */ *uap = v; 1052 struct proc *p = l->l_proc; 1053 caddr_t sg; 1054 int n, error, i; 1055 struct sys_getgroups_args bsa; 1056 gid_t *bset, *kbset; 1057 linux_gid_t *lset; 1058 struct pcred *pc = p->p_cred; 1059 1060 n = SCARG(uap, gidsetsize); 1061 if (n < 0) 1062 return EINVAL; 1063 error = 0; 1064 bset = kbset = NULL; 1065 lset = NULL; 1066 if (n > 0) { 1067 n = min(pc->pc_ucred->cr_ngroups, n); 1068 sg = stackgap_init(p->p_emul); 1069 bset = stackgap_alloc(&sg, n * sizeof (gid_t)); 1070 kbset = malloc(n * sizeof (gid_t), M_TEMP, M_WAITOK); 1071 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1072 if (bset == NULL || kbset == NULL || lset == NULL) 1073 return ENOMEM; 1074 SCARG(&bsa, gidsetsize) = n; 1075 SCARG(&bsa, gidset) = bset; 1076 error = sys_getgroups(l, &bsa, retval); 1077 if (error != 0) 1078 goto out; 1079 error = copyin(bset, kbset, n * sizeof (gid_t)); 1080 if (error != 0) 1081 goto out; 1082 for (i = 0; i < n; i++) 1083 lset[i] = (linux_gid_t)kbset[i]; 1084 error = copyout(lset, SCARG(uap, gidset), 1085 n * sizeof (linux_gid_t)); 1086 } else 1087 *retval = pc->pc_ucred->cr_ngroups; 1088 out: 1089 if (kbset != NULL) 1090 free(kbset, M_TEMP); 1091 if (lset != NULL) 1092 free(lset, M_TEMP); 1093 return error; 1094 } 1095 1096 int 1097 linux_sys_setgroups16(l, v, retval) 1098 struct lwp *l; 1099 void *v; 1100 register_t *retval; 1101 { 1102 struct linux_sys_setgroups16_args /* { 1103 syscallarg(int) gidsetsize; 1104 syscallarg(linux_gid_t *) gidset; 1105 } */ *uap = v; 1106 struct proc *p = l->l_proc; 1107 caddr_t sg; 1108 int n; 1109 int error, i; 1110 struct sys_setgroups_args bsa; 1111 gid_t *bset, *kbset; 1112 linux_gid_t *lset; 1113 1114 n = SCARG(uap, gidsetsize); 1115 if (n < 0 || n > NGROUPS) 1116 return EINVAL; 1117 sg = stackgap_init(p->p_emul); 1118 bset = stackgap_alloc(&sg, n * sizeof (gid_t)); 1119 lset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1120 kbset = malloc(n * sizeof (linux_gid_t), M_TEMP, M_WAITOK); 1121 if (lset == NULL || bset == NULL) 1122 return ENOMEM; 1123 error = copyin(SCARG(uap, gidset), lset, n * sizeof (linux_gid_t)); 1124 if (error != 0) 1125 goto out; 1126 for (i = 0; i < n; i++) 1127 kbset[i] = (gid_t)lset[i]; 1128 error = copyout(kbset, bset, n * sizeof (gid_t)); 1129 if (error != 0) 1130 goto out; 1131 SCARG(&bsa, gidsetsize) = n; 1132 SCARG(&bsa, gidset) = bset; 1133 error = sys_setgroups(l, &bsa, retval); 1134 1135 out: 1136 if (lset != NULL) 1137 free(lset, M_TEMP); 1138 if (kbset != NULL) 1139 free(kbset, M_TEMP); 1140 1141 return error; 1142 } 1143 1144 #endif /* __i386__ || __m68k__ */ 1145 1146 /* 1147 * We have nonexistent fsuid equal to uid. 1148 * If modification is requested, refuse. 1149 */ 1150 int 1151 linux_sys_setfsuid(l, v, retval) 1152 struct lwp *l; 1153 void *v; 1154 register_t *retval; 1155 { 1156 struct linux_sys_setfsuid_args /* { 1157 syscallarg(uid_t) uid; 1158 } */ *uap = v; 1159 struct proc *p = l->l_proc; 1160 uid_t uid; 1161 1162 uid = SCARG(uap, uid); 1163 if (p->p_cred->p_ruid != uid) 1164 return sys_nosys(l, v, retval); 1165 else 1166 return (0); 1167 } 1168 1169 /* XXX XXX XXX */ 1170 #ifndef alpha 1171 int 1172 linux_sys_getfsuid(l, v, retval) 1173 struct lwp *l; 1174 void *v; 1175 register_t *retval; 1176 { 1177 return sys_getuid(l, v, retval); 1178 } 1179 #endif 1180 1181 int 1182 linux_sys___sysctl(l, v, retval) 1183 struct lwp *l; 1184 void *v; 1185 register_t *retval; 1186 { 1187 struct linux_sys___sysctl_args /* { 1188 syscallarg(struct linux___sysctl *) lsp; 1189 } */ *uap = v; 1190 struct linux___sysctl ls; 1191 struct sys___sysctl_args bsa; 1192 int error; 1193 1194 if ((error = copyin(SCARG(uap, lsp), &ls, sizeof ls))) 1195 return error; 1196 SCARG(&bsa, name) = ls.name; 1197 SCARG(&bsa, namelen) = ls.namelen; 1198 SCARG(&bsa, old) = ls.old; 1199 SCARG(&bsa, oldlenp) = ls.oldlenp; 1200 SCARG(&bsa, new) = ls.new; 1201 SCARG(&bsa, newlen) = ls.newlen; 1202 1203 return sys___sysctl(l, &bsa, retval); 1204 } 1205 1206 int 1207 linux_sys_setresuid(l, v, retval) 1208 struct lwp *l; 1209 void *v; 1210 register_t *retval; 1211 { 1212 struct linux_sys_setresuid_args /* { 1213 syscallarg(uid_t) ruid; 1214 syscallarg(uid_t) euid; 1215 syscallarg(uid_t) suid; 1216 } */ *uap = v; 1217 struct proc *p = l->l_proc; 1218 struct pcred *pc = p->p_cred; 1219 uid_t ruid, euid, suid; 1220 int error; 1221 1222 ruid = SCARG(uap, ruid); 1223 euid = SCARG(uap, euid); 1224 suid = SCARG(uap, suid); 1225 1226 /* 1227 * Note: These checks are a little different than the NetBSD 1228 * setreuid(2) call performs. This precisely follows the 1229 * behavior of the Linux kernel. 1230 */ 1231 if (ruid != (uid_t)-1 && 1232 ruid != pc->p_ruid && 1233 ruid != pc->pc_ucred->cr_uid && 1234 ruid != pc->p_svuid && 1235 (error = suser(pc->pc_ucred, &p->p_acflag))) 1236 return (error); 1237 1238 if (euid != (uid_t)-1 && 1239 euid != pc->p_ruid && 1240 euid != pc->pc_ucred->cr_uid && 1241 euid != pc->p_svuid && 1242 (error = suser(pc->pc_ucred, &p->p_acflag))) 1243 return (error); 1244 1245 if (suid != (uid_t)-1 && 1246 suid != pc->p_ruid && 1247 suid != pc->pc_ucred->cr_uid && 1248 suid != pc->p_svuid && 1249 (error = suser(pc->pc_ucred, &p->p_acflag))) 1250 return (error); 1251 1252 /* 1253 * Now assign the new real, effective, and saved UIDs. 1254 * Note that Linux, unlike NetBSD in setreuid(2), does not 1255 * set the saved UID in this call unless the user specifies 1256 * it. 1257 */ 1258 if (ruid != (uid_t)-1) { 1259 (void)chgproccnt(pc->p_ruid, -1); 1260 (void)chgproccnt(ruid, 1); 1261 pc->p_ruid = ruid; 1262 } 1263 1264 if (euid != (uid_t)-1) { 1265 pc->pc_ucred = crcopy(pc->pc_ucred); 1266 pc->pc_ucred->cr_uid = euid; 1267 } 1268 1269 if (suid != (uid_t)-1) 1270 pc->p_svuid = suid; 1271 1272 if (ruid != (uid_t)-1 && euid != (uid_t)-1 && suid != (uid_t)-1) 1273 p->p_flag |= P_SUGID; 1274 return (0); 1275 } 1276 1277 int 1278 linux_sys_getresuid(l, v, retval) 1279 struct lwp *l; 1280 void *v; 1281 register_t *retval; 1282 { 1283 struct linux_sys_getresuid_args /* { 1284 syscallarg(uid_t *) ruid; 1285 syscallarg(uid_t *) euid; 1286 syscallarg(uid_t *) suid; 1287 } */ *uap = v; 1288 struct proc *p = l->l_proc; 1289 struct pcred *pc = p->p_cred; 1290 int error; 1291 1292 /* 1293 * Linux copies these values out to userspace like so: 1294 * 1295 * 1. Copy out ruid. 1296 * 2. If that succeeds, copy out euid. 1297 * 3. If both of those succeed, copy out suid. 1298 */ 1299 if ((error = copyout(&pc->p_ruid, SCARG(uap, ruid), 1300 sizeof(uid_t))) != 0) 1301 return (error); 1302 1303 if ((error = copyout(&pc->pc_ucred->cr_uid, SCARG(uap, euid), 1304 sizeof(uid_t))) != 0) 1305 return (error); 1306 1307 return (copyout(&pc->p_svuid, SCARG(uap, suid), sizeof(uid_t))); 1308 } 1309 1310 int 1311 linux_sys_ptrace(l, v, retval) 1312 struct lwp *l; 1313 void *v; 1314 register_t *retval; 1315 { 1316 struct linux_sys_ptrace_args /* { 1317 i386, m68k, powerpc: T=int 1318 alpha: T=long 1319 syscallarg(T) request; 1320 syscallarg(T) pid; 1321 syscallarg(T) addr; 1322 syscallarg(T) data; 1323 } */ *uap = v; 1324 const int *ptr; 1325 int request; 1326 int error; 1327 1328 ptr = linux_ptrace_request_map; 1329 request = SCARG(uap, request); 1330 while (*ptr != -1) 1331 if (*ptr++ == request) { 1332 struct sys_ptrace_args pta; 1333 1334 SCARG(&pta, req) = *ptr; 1335 SCARG(&pta, pid) = SCARG(uap, pid); 1336 SCARG(&pta, addr) = (caddr_t)SCARG(uap, addr); 1337 SCARG(&pta, data) = SCARG(uap, data); 1338 1339 /* 1340 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 1341 * to continue where the process left off previously. 1342 * The same thing is achieved by addr == (caddr_t) 1 1343 * on NetBSD, so rewrite 'addr' appropriately. 1344 */ 1345 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 1346 SCARG(&pta, addr) = (caddr_t) 1; 1347 1348 error = sys_ptrace(l, &pta, retval); 1349 if (error) 1350 return error; 1351 switch (request) { 1352 case LINUX_PTRACE_PEEKTEXT: 1353 case LINUX_PTRACE_PEEKDATA: 1354 error = copyout (retval, 1355 (caddr_t)SCARG(uap, data), sizeof *retval); 1356 *retval = SCARG(uap, data); 1357 break; 1358 default: 1359 break; 1360 } 1361 return error; 1362 } 1363 else 1364 ptr++; 1365 1366 return LINUX_SYS_PTRACE_ARCH(l, uap, retval); 1367 } 1368 1369 int 1370 linux_sys_reboot(struct lwp *l, void *v, register_t *retval) 1371 { 1372 struct linux_sys_reboot_args /* { 1373 syscallarg(int) magic1; 1374 syscallarg(int) magic2; 1375 syscallarg(int) cmd; 1376 syscallarg(void *) arg; 1377 } */ *uap = v; 1378 struct sys_reboot_args /* { 1379 syscallarg(int) opt; 1380 syscallarg(char *) bootstr; 1381 } */ sra; 1382 struct proc *p = l->l_proc; 1383 int error; 1384 1385 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1386 return(error); 1387 1388 if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) 1389 return(EINVAL); 1390 if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && 1391 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && 1392 SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) 1393 return(EINVAL); 1394 1395 switch (SCARG(uap, cmd)) { 1396 case LINUX_REBOOT_CMD_RESTART: 1397 SCARG(&sra, opt) = RB_AUTOBOOT; 1398 break; 1399 case LINUX_REBOOT_CMD_HALT: 1400 SCARG(&sra, opt) = RB_HALT; 1401 break; 1402 case LINUX_REBOOT_CMD_POWER_OFF: 1403 SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; 1404 break; 1405 case LINUX_REBOOT_CMD_RESTART2: 1406 /* Reboot with an argument. */ 1407 SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; 1408 SCARG(&sra, bootstr) = SCARG(uap, arg); 1409 break; 1410 case LINUX_REBOOT_CMD_CAD_ON: 1411 return(EINVAL); /* We don't implement ctrl-alt-delete */ 1412 case LINUX_REBOOT_CMD_CAD_OFF: 1413 return(0); 1414 default: 1415 return(EINVAL); 1416 } 1417 1418 return(sys_reboot(l, &sra, retval)); 1419 } 1420 1421 /* 1422 * Copy of compat_12_sys_swapon(). 1423 */ 1424 int 1425 linux_sys_swapon(l, v, retval) 1426 struct lwp *l; 1427 void *v; 1428 register_t *retval; 1429 { 1430 struct sys_swapctl_args ua; 1431 struct linux_sys_swapon_args /* { 1432 syscallarg(const char *) name; 1433 } */ *uap = v; 1434 1435 SCARG(&ua, cmd) = SWAP_ON; 1436 SCARG(&ua, arg) = (void *)SCARG(uap, name); 1437 SCARG(&ua, misc) = 0; /* priority */ 1438 return (sys_swapctl(l, &ua, retval)); 1439 } 1440 1441 /* 1442 * Stop swapping to the file or block device specified by path. 1443 */ 1444 int 1445 linux_sys_swapoff(l, v, retval) 1446 struct lwp *l; 1447 void *v; 1448 register_t *retval; 1449 { 1450 struct sys_swapctl_args ua; 1451 struct linux_sys_swapoff_args /* { 1452 syscallarg(const char *) path; 1453 } */ *uap = v; 1454 1455 SCARG(&ua, cmd) = SWAP_OFF; 1456 SCARG(&ua, arg) = (void *)SCARG(uap, path); 1457 return (sys_swapctl(l, &ua, retval)); 1458 } 1459 1460 /* 1461 * Copy of compat_09_sys_setdomainname() 1462 */ 1463 /* ARGSUSED */ 1464 int 1465 linux_sys_setdomainname(l, v, retval) 1466 struct lwp *l; 1467 void *v; 1468 register_t *retval; 1469 { 1470 struct linux_sys_setdomainname_args /* { 1471 syscallarg(char *) domainname; 1472 syscallarg(int) len; 1473 } */ *uap = v; 1474 struct proc *p = l->l_proc; 1475 int name; 1476 int error; 1477 1478 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1479 return (error); 1480 name = KERN_DOMAINNAME; 1481 return (kern_sysctl(&name, 1, 0, 0, SCARG(uap, domainname), 1482 SCARG(uap, len), p)); 1483 } 1484 1485 /* 1486 * sysinfo() 1487 */ 1488 /* ARGSUSED */ 1489 int 1490 linux_sys_sysinfo(l, v, retval) 1491 struct lwp *l; 1492 void *v; 1493 register_t *retval; 1494 { 1495 struct linux_sys_sysinfo_args /* { 1496 syscallarg(struct linux_sysinfo *) arg; 1497 } */ *uap = v; 1498 struct linux_sysinfo si; 1499 struct loadavg *la; 1500 1501 si.uptime = time.tv_sec - boottime.tv_sec; 1502 la = &averunnable; 1503 si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1504 si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1505 si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; 1506 si.totalram = ctob(physmem); 1507 si.freeram = uvmexp.free * uvmexp.pagesize; 1508 si.sharedram = 0; /* XXX */ 1509 si.bufferram = uvmexp.filepages * uvmexp.pagesize; 1510 si.totalswap = uvmexp.swpages * uvmexp.pagesize; 1511 si.freeswap = (uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize; 1512 si.procs = nprocs; 1513 1514 /* The following are only present in newer Linux kernels. */ 1515 si.totalbig = 0; 1516 si.freebig = 0; 1517 si.mem_unit = 1; 1518 1519 return (copyout(&si, SCARG(uap, arg), sizeof si)); 1520 } 1521 1522 #define bsd_to_linux_rlimit1(l, b, f) \ 1523 (l)->f = ((b)->f == RLIM_INFINITY || ((b)->f & 0xffffffff00000000) != 0) ? \ 1524 LINUX_RLIM_INFINITY : (int32_t)(b)->f 1525 #define bsd_to_linux_rlimit(l, b) \ 1526 bsd_to_linux_rlimit1(l, b, rlim_cur); \ 1527 bsd_to_linux_rlimit1(l, b, rlim_max) 1528 1529 #define linux_to_bsd_rlimit1(b, l, f) \ 1530 (b)->f = (l)->f == LINUX_RLIM_INFINITY ? RLIM_INFINITY : (b)->f 1531 #define linux_to_bsd_rlimit(b, l) \ 1532 linux_to_bsd_rlimit1(b, l, rlim_cur); \ 1533 linux_to_bsd_rlimit1(b, l, rlim_max) 1534 1535 static int 1536 linux_to_bsd_limit(lim) 1537 int lim; 1538 { 1539 switch (lim) { 1540 case LINUX_RLIMIT_CPU: 1541 return RLIMIT_CPU; 1542 case LINUX_RLIMIT_FSIZE: 1543 return RLIMIT_FSIZE; 1544 case LINUX_RLIMIT_DATA: 1545 return RLIMIT_DATA; 1546 case LINUX_RLIMIT_STACK: 1547 return RLIMIT_STACK; 1548 case LINUX_RLIMIT_CORE: 1549 return RLIMIT_CORE; 1550 case LINUX_RLIMIT_RSS: 1551 return RLIMIT_RSS; 1552 case LINUX_RLIMIT_NPROC: 1553 return RLIMIT_NPROC; 1554 case LINUX_RLIMIT_NOFILE: 1555 return RLIMIT_NOFILE; 1556 case LINUX_RLIMIT_MEMLOCK: 1557 return RLIMIT_MEMLOCK; 1558 case LINUX_RLIMIT_AS: 1559 case LINUX_RLIMIT_LOCKS: 1560 return -EOPNOTSUPP; 1561 default: 1562 return -EINVAL; 1563 } 1564 } 1565 1566 1567 int 1568 linux_sys_getrlimit(p, v, retval) 1569 struct proc *p; 1570 void *v; 1571 register_t *retval; 1572 { 1573 struct linux_sys_getrlimit_args /* { 1574 syscallarg(int) which; 1575 syscallarg(struct orlimit *) rlp; 1576 } */ *uap = v; 1577 caddr_t sg = stackgap_init(p->p_emul); 1578 struct sys_getrlimit_args ap; 1579 struct rlimit rl; 1580 struct orlimit orl; 1581 int error; 1582 1583 SCARG(&ap, which) = linux_to_bsd_limit(SCARG(uap, which)); 1584 if ((error = SCARG(&ap, which)) < 0) 1585 return -error; 1586 SCARG(&ap, rlp) = stackgap_alloc(&sg, sizeof rl); 1587 if ((error = sys_getrlimit(p, &ap, retval)) != 0) 1588 return error; 1589 if ((error = copyin(SCARG(&ap, rlp), &rl, sizeof(rl))) != 0) 1590 return error; 1591 bsd_to_linux_rlimit(&orl, &rl); 1592 return copyout(&orl, SCARG(uap, rlp), sizeof(orl)); 1593 } 1594 1595 int 1596 linux_sys_setrlimit(p, v, retval) 1597 struct proc *p; 1598 void *v; 1599 register_t *retval; 1600 { 1601 struct linux_sys_setrlimit_args /* { 1602 syscallarg(int) which; 1603 syscallarg(struct orlimit *) rlp; 1604 } */ *uap = v; 1605 caddr_t sg = stackgap_init(p->p_emul); 1606 struct sys_setrlimit_args ap; 1607 struct rlimit rl; 1608 struct orlimit orl; 1609 int error; 1610 1611 SCARG(&ap, which) = linux_to_bsd_limit(SCARG(uap, which)); 1612 SCARG(&ap, rlp) = stackgap_alloc(&sg, sizeof rl); 1613 if ((error = SCARG(&ap, which)) < 0) 1614 return -error; 1615 if ((error = copyin(SCARG(uap, rlp), &orl, sizeof(orl))) != 0) 1616 return error; 1617 linux_to_bsd_rlimit(&rl, &orl); 1618 /* XXX: alpha complains about this */ 1619 if ((error = copyout(&rl, (void *)SCARG(&ap, rlp), sizeof(rl))) != 0) 1620 return error; 1621 return sys_setrlimit(p, &ap, retval); 1622 } 1623 1624 #ifndef __mips__ 1625 /* XXX: this doesn't look 100% common, at least mips doesn't have it */ 1626 int 1627 linux_sys_ugetrlimit(p, v, retval) 1628 struct proc *p; 1629 void *v; 1630 register_t *retval; 1631 { 1632 return linux_sys_getrlimit(p, v, retval); 1633 } 1634 #endif 1635 1636 /* 1637 * This gets called for unsupported syscalls. The difference to sys_nosys() 1638 * is that process does not get SIGSYS, the call just returns with ENOSYS. 1639 * This is the way Linux does it and glibc depends on this behaviour. 1640 */ 1641 int 1642 linux_sys_nosys(l, v, retval) 1643 struct lwp *l; 1644 void *v; 1645 register_t *retval; 1646 { 1647 return (ENOSYS); 1648 } 1649
Indexes created Mon Sep 22 13:09:51 GMT 2025