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