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