1 /* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls. 2 * 3 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 4 * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net) 5 * 6 * These routines maintain argument size conversion between 32bit and 64bit 7 * environment. 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/sched.h> 12 #include <linux/capability.h> 13 #include <linux/fs.h> 14 #include <linux/mm.h> 15 #include <linux/file.h> 16 #include <linux/signal.h> 17 #include <linux/resource.h> 18 #include <linux/times.h> 19 #include <linux/smp.h> 20 #include <linux/smp_lock.h> 21 #include <linux/sem.h> 22 #include <linux/msg.h> 23 #include <linux/shm.h> 24 #include <linux/slab.h> 25 #include <linux/uio.h> 26 #include <linux/nfs_fs.h> 27 #include <linux/quota.h> 28 #include <linux/module.h> 29 #include <linux/poll.h> 30 #include <linux/personality.h> 31 #include <linux/stat.h> 32 #include <linux/filter.h> 33 #include <linux/highmem.h> 34 #include <linux/highuid.h> 35 #include <linux/mman.h> 36 #include <linux/ipv6.h> 37 #include <linux/in.h> 38 #include <linux/icmpv6.h> 39 #include <linux/syscalls.h> 40 #include <linux/sysctl.h> 41 #include <linux/binfmts.h> 42 #include <linux/dnotify.h> 43 #include <linux/security.h> 44 #include <linux/compat.h> 45 #include <linux/vfs.h> 46 #include <linux/netfilter_ipv4/ip_tables.h> 47 #include <linux/ptrace.h> 48 49 #include <asm/types.h> 50 #include <asm/uaccess.h> 51 #include <asm/fpumacro.h> 52 #include <asm/mmu_context.h> 53 #include <asm/compat_signal.h> 54 55 #ifdef CONFIG_SYSVIPC 56 asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth) 57 { 58 int version; 59 60 version = call >> 16; /* hack for backward compatibility */ 61 call &= 0xffff; 62 63 switch (call) { 64 case SEMTIMEDOP: 65 if (fifth) 66 /* sign extend semid */ 67 return compat_sys_semtimedop((int)first, 68 compat_ptr(ptr), second, 69 compat_ptr(fifth)); 70 /* else fall through for normal semop() */ 71 case SEMOP: 72 /* struct sembuf is the same on 32 and 64bit :)) */ 73 /* sign extend semid */ 74 return sys_semtimedop((int)first, compat_ptr(ptr), second, 75 NULL); 76 case SEMGET: 77 /* sign extend key, nsems */ 78 return sys_semget((int)first, (int)second, third); 79 case SEMCTL: 80 /* sign extend semid, semnum */ 81 return compat_sys_semctl((int)first, (int)second, third, 82 compat_ptr(ptr)); 83 84 case MSGSND: 85 /* sign extend msqid */ 86 return compat_sys_msgsnd((int)first, (int)second, third, 87 compat_ptr(ptr)); 88 case MSGRCV: 89 /* sign extend msqid, msgtyp */ 90 return compat_sys_msgrcv((int)first, second, (int)fifth, 91 third, version, compat_ptr(ptr)); 92 case MSGGET: 93 /* sign extend key */ 94 return sys_msgget((int)first, second); 95 case MSGCTL: 96 /* sign extend msqid */ 97 return compat_sys_msgctl((int)first, second, compat_ptr(ptr)); 98 99 case SHMAT: 100 /* sign extend shmid */ 101 return compat_sys_shmat((int)first, second, third, version, 102 compat_ptr(ptr)); 103 case SHMDT: 104 return sys_shmdt(compat_ptr(ptr)); 105 case SHMGET: 106 /* sign extend key_t */ 107 return sys_shmget((int)first, second, third); 108 case SHMCTL: 109 /* sign extend shmid */ 110 return compat_sys_shmctl((int)first, second, compat_ptr(ptr)); 111 112 default: 113 return -ENOSYS; 114 }; 115 116 return -ENOSYS; 117 } 118 #endif 119 120 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low) 121 { 122 if ((int)high < 0) 123 return -EINVAL; 124 else 125 return sys_truncate(path, (high << 32) | low); 126 } 127 128 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low) 129 { 130 if ((int)high < 0) 131 return -EINVAL; 132 else 133 return sys_ftruncate(fd, (high << 32) | low); 134 } 135 136 static int cp_compat_stat64(struct kstat *stat, 137 struct compat_stat64 __user *statbuf) 138 { 139 int err; 140 141 err = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev); 142 err |= put_user(stat->ino, &statbuf->st_ino); 143 err |= put_user(stat->mode, &statbuf->st_mode); 144 err |= put_user(stat->nlink, &statbuf->st_nlink); 145 err |= put_user(stat->uid, &statbuf->st_uid); 146 err |= put_user(stat->gid, &statbuf->st_gid); 147 err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev); 148 err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]); 149 err |= put_user(stat->size, &statbuf->st_size); 150 err |= put_user(stat->blksize, &statbuf->st_blksize); 151 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]); 152 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]); 153 err |= put_user(stat->blocks, &statbuf->st_blocks); 154 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime); 155 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec); 156 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime); 157 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec); 158 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime); 159 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec); 160 err |= put_user(0, &statbuf->__unused4); 161 err |= put_user(0, &statbuf->__unused5); 162 163 return err; 164 } 165 166 asmlinkage long compat_sys_stat64(char __user * filename, 167 struct compat_stat64 __user *statbuf) 168 { 169 struct kstat stat; 170 int error = vfs_stat(filename, &stat); 171 172 if (!error) 173 error = cp_compat_stat64(&stat, statbuf); 174 return error; 175 } 176 177 asmlinkage long compat_sys_lstat64(char __user * filename, 178 struct compat_stat64 __user *statbuf) 179 { 180 struct kstat stat; 181 int error = vfs_lstat(filename, &stat); 182 183 if (!error) 184 error = cp_compat_stat64(&stat, statbuf); 185 return error; 186 } 187 188 asmlinkage long compat_sys_fstat64(unsigned int fd, 189 struct compat_stat64 __user * statbuf) 190 { 191 struct kstat stat; 192 int error = vfs_fstat(fd, &stat); 193 194 if (!error) 195 error = cp_compat_stat64(&stat, statbuf); 196 return error; 197 } 198 199 asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename, 200 struct compat_stat64 __user * statbuf, int flag) 201 { 202 struct kstat stat; 203 int error; 204 205 error = vfs_fstatat(dfd, filename, &stat, flag); 206 if (error) 207 return error; 208 return cp_compat_stat64(&stat, statbuf); 209 } 210 211 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2) 212 { 213 return sys_sysfs(option, arg1, arg2); 214 } 215 216 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval) 217 { 218 struct timespec t; 219 int ret; 220 mm_segment_t old_fs = get_fs (); 221 222 set_fs (KERNEL_DS); 223 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t); 224 set_fs (old_fs); 225 if (put_compat_timespec(&t, interval)) 226 return -EFAULT; 227 return ret; 228 } 229 230 asmlinkage long compat_sys_rt_sigprocmask(int how, 231 compat_sigset_t __user *set, 232 compat_sigset_t __user *oset, 233 compat_size_t sigsetsize) 234 { 235 sigset_t s; 236 compat_sigset_t s32; 237 int ret; 238 mm_segment_t old_fs = get_fs(); 239 240 if (set) { 241 if (copy_from_user (&s32, set, sizeof(compat_sigset_t))) 242 return -EFAULT; 243 switch (_NSIG_WORDS) { 244 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32); 245 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32); 246 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32); 247 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32); 248 } 249 } 250 set_fs (KERNEL_DS); 251 ret = sys_rt_sigprocmask(how, 252 set ? (sigset_t __user *) &s : NULL, 253 oset ? (sigset_t __user *) &s : NULL, 254 sigsetsize); 255 set_fs (old_fs); 256 if (ret) return ret; 257 if (oset) { 258 switch (_NSIG_WORDS) { 259 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; 260 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; 261 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; 262 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; 263 } 264 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t))) 265 return -EFAULT; 266 } 267 return 0; 268 } 269 270 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set, 271 compat_size_t sigsetsize) 272 { 273 sigset_t s; 274 compat_sigset_t s32; 275 int ret; 276 mm_segment_t old_fs = get_fs(); 277 278 set_fs (KERNEL_DS); 279 ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize); 280 set_fs (old_fs); 281 if (!ret) { 282 switch (_NSIG_WORDS) { 283 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; 284 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; 285 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; 286 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; 287 } 288 if (copy_to_user (set, &s32, sizeof(compat_sigset_t))) 289 return -EFAULT; 290 } 291 return ret; 292 } 293 294 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig, 295 struct compat_siginfo __user *uinfo) 296 { 297 siginfo_t info; 298 int ret; 299 mm_segment_t old_fs = get_fs(); 300 301 if (copy_siginfo_from_user32(&info, uinfo)) 302 return -EFAULT; 303 304 set_fs (KERNEL_DS); 305 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info); 306 set_fs (old_fs); 307 return ret; 308 } 309 310 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act, 311 struct old_sigaction32 __user *oact) 312 { 313 struct k_sigaction new_ka, old_ka; 314 int ret; 315 316 WARN_ON_ONCE(sig >= 0); 317 sig = -sig; 318 319 if (act) { 320 compat_old_sigset_t mask; 321 u32 u_handler, u_restorer; 322 323 ret = get_user(u_handler, &act->sa_handler); 324 new_ka.sa.sa_handler = compat_ptr(u_handler); 325 ret |= __get_user(u_restorer, &act->sa_restorer); 326 new_ka.sa.sa_restorer = compat_ptr(u_restorer); 327 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); 328 ret |= __get_user(mask, &act->sa_mask); 329 if (ret) 330 return ret; 331 new_ka.ka_restorer = NULL; 332 siginitset(&new_ka.sa.sa_mask, mask); 333 } 334 335 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); 336 337 if (!ret && oact) { 338 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler); 339 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer); 340 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); 341 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); 342 } 343 344 return ret; 345 } 346 347 asmlinkage long compat_sys_rt_sigaction(int sig, 348 struct sigaction32 __user *act, 349 struct sigaction32 __user *oact, 350 void __user *restorer, 351 compat_size_t sigsetsize) 352 { 353 struct k_sigaction new_ka, old_ka; 354 int ret; 355 compat_sigset_t set32; 356 357 /* XXX: Don't preclude handling different sized sigset_t's. */ 358 if (sigsetsize != sizeof(compat_sigset_t)) 359 return -EINVAL; 360 361 if (act) { 362 u32 u_handler, u_restorer; 363 364 new_ka.ka_restorer = restorer; 365 ret = get_user(u_handler, &act->sa_handler); 366 new_ka.sa.sa_handler = compat_ptr(u_handler); 367 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t)); 368 switch (_NSIG_WORDS) { 369 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32); 370 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32); 371 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32); 372 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32); 373 } 374 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); 375 ret |= __get_user(u_restorer, &act->sa_restorer); 376 new_ka.sa.sa_restorer = compat_ptr(u_restorer); 377 if (ret) 378 return -EFAULT; 379 } 380 381 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); 382 383 if (!ret && oact) { 384 switch (_NSIG_WORDS) { 385 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3]; 386 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2]; 387 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1]; 388 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0]; 389 } 390 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler); 391 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t)); 392 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); 393 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer); 394 if (ret) 395 ret = -EFAULT; 396 } 397 398 return ret; 399 } 400 401 /* 402 * sparc32_execve() executes a new program after the asm stub has set 403 * things up for us. This should basically do what I want it to. 404 */ 405 asmlinkage long sparc32_execve(struct pt_regs *regs) 406 { 407 int error, base = 0; 408 char *filename; 409 410 /* User register window flush is done by entry.S */ 411 412 /* Check for indirect call. */ 413 if ((u32)regs->u_regs[UREG_G1] == 0) 414 base = 1; 415 416 filename = getname(compat_ptr(regs->u_regs[base + UREG_I0])); 417 error = PTR_ERR(filename); 418 if (IS_ERR(filename)) 419 goto out; 420 421 error = compat_do_execve(filename, 422 compat_ptr(regs->u_regs[base + UREG_I1]), 423 compat_ptr(regs->u_regs[base + UREG_I2]), regs); 424 425 putname(filename); 426 427 if (!error) { 428 fprs_write(0); 429 current_thread_info()->xfsr[0] = 0; 430 current_thread_info()->fpsaved[0] = 0; 431 regs->tstate &= ~TSTATE_PEF; 432 } 433 out: 434 return error; 435 } 436 437 #ifdef CONFIG_MODULES 438 439 asmlinkage long sys32_init_module(void __user *umod, u32 len, 440 const char __user *uargs) 441 { 442 return sys_init_module(umod, len, uargs); 443 } 444 445 asmlinkage long sys32_delete_module(const char __user *name_user, 446 unsigned int flags) 447 { 448 return sys_delete_module(name_user, flags); 449 } 450 451 #else /* CONFIG_MODULES */ 452 453 asmlinkage long sys32_init_module(const char __user *name_user, 454 struct module __user *mod_user) 455 { 456 return -ENOSYS; 457 } 458 459 asmlinkage long sys32_delete_module(const char __user *name_user) 460 { 461 return -ENOSYS; 462 } 463 464 #endif /* CONFIG_MODULES */ 465 466 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd, 467 char __user *ubuf, 468 compat_size_t count, 469 unsigned long poshi, 470 unsigned long poslo) 471 { 472 return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo); 473 } 474 475 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd, 476 char __user *ubuf, 477 compat_size_t count, 478 unsigned long poshi, 479 unsigned long poslo) 480 { 481 return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo); 482 } 483 484 asmlinkage long compat_sys_readahead(int fd, 485 unsigned long offhi, 486 unsigned long offlo, 487 compat_size_t count) 488 { 489 return sys_readahead(fd, (offhi << 32) | offlo, count); 490 } 491 492 long compat_sys_fadvise64(int fd, 493 unsigned long offhi, 494 unsigned long offlo, 495 compat_size_t len, int advice) 496 { 497 return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice); 498 } 499 500 long compat_sys_fadvise64_64(int fd, 501 unsigned long offhi, unsigned long offlo, 502 unsigned long lenhi, unsigned long lenlo, 503 int advice) 504 { 505 return sys_fadvise64_64(fd, 506 (offhi << 32) | offlo, 507 (lenhi << 32) | lenlo, 508 advice); 509 } 510 511 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 512 compat_off_t __user *offset, 513 compat_size_t count) 514 { 515 mm_segment_t old_fs = get_fs(); 516 int ret; 517 off_t of; 518 519 if (offset && get_user(of, offset)) 520 return -EFAULT; 521 522 set_fs(KERNEL_DS); 523 ret = sys_sendfile(out_fd, in_fd, 524 offset ? (off_t __user *) &of : NULL, 525 count); 526 set_fs(old_fs); 527 528 if (offset && put_user(of, offset)) 529 return -EFAULT; 530 531 return ret; 532 } 533 534 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 535 compat_loff_t __user *offset, 536 compat_size_t count) 537 { 538 mm_segment_t old_fs = get_fs(); 539 int ret; 540 loff_t lof; 541 542 if (offset && get_user(lof, offset)) 543 return -EFAULT; 544 545 set_fs(KERNEL_DS); 546 ret = sys_sendfile64(out_fd, in_fd, 547 offset ? (loff_t __user *) &lof : NULL, 548 count); 549 set_fs(old_fs); 550 551 if (offset && put_user(lof, offset)) 552 return -EFAULT; 553 554 return ret; 555 } 556 557 /* This is just a version for 32-bit applications which does 558 * not force O_LARGEFILE on. 559 */ 560 561 asmlinkage long sparc32_open(const char __user *filename, 562 int flags, int mode) 563 { 564 return do_sys_open(AT_FDCWD, filename, flags, mode); 565 } 566 567 long sys32_lookup_dcookie(unsigned long cookie_high, 568 unsigned long cookie_low, 569 char __user *buf, size_t len) 570 { 571 return sys_lookup_dcookie((cookie_high << 32) | cookie_low, 572 buf, len); 573 } 574 575 long compat_sync_file_range(int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, int flags) 576 { 577 return sys_sync_file_range(fd, 578 (off_high << 32) | off_low, 579 (nb_high << 32) | nb_low, 580 flags); 581 } 582 583 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo, 584 u32 lenhi, u32 lenlo) 585 { 586 return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo, 587 ((loff_t)lenhi << 32) | lenlo); 588 } 589