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(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid); 143 err |= put_user(from_kgid_munged(current_user_ns(), 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_rt_sigprocmask(int how, 215 compat_sigset_t __user *set, 216 compat_sigset_t __user *oset, 217 compat_size_t sigsetsize) 218 { 219 sigset_t s; 220 compat_sigset_t s32; 221 int ret; 222 mm_segment_t old_fs = get_fs(); 223 224 if (set) { 225 if (copy_from_user (&s32, set, sizeof(compat_sigset_t))) 226 return -EFAULT; 227 switch (_NSIG_WORDS) { 228 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32); 229 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32); 230 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32); 231 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32); 232 } 233 } 234 set_fs (KERNEL_DS); 235 ret = sys_rt_sigprocmask(how, 236 set ? (sigset_t __user *) &s : NULL, 237 oset ? (sigset_t __user *) &s : NULL, 238 sigsetsize); 239 set_fs (old_fs); 240 if (ret) return ret; 241 if (oset) { 242 switch (_NSIG_WORDS) { 243 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; 244 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; 245 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; 246 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; 247 } 248 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t))) 249 return -EFAULT; 250 } 251 return 0; 252 } 253 254 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set, 255 compat_size_t sigsetsize) 256 { 257 sigset_t s; 258 compat_sigset_t s32; 259 int ret; 260 mm_segment_t old_fs = get_fs(); 261 262 set_fs (KERNEL_DS); 263 ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize); 264 set_fs (old_fs); 265 if (!ret) { 266 switch (_NSIG_WORDS) { 267 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; 268 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; 269 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; 270 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; 271 } 272 if (copy_to_user (set, &s32, sizeof(compat_sigset_t))) 273 return -EFAULT; 274 } 275 return ret; 276 } 277 278 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig, 279 struct compat_siginfo __user *uinfo) 280 { 281 siginfo_t info; 282 int ret; 283 mm_segment_t old_fs = get_fs(); 284 285 if (copy_siginfo_from_user32(&info, uinfo)) 286 return -EFAULT; 287 288 set_fs (KERNEL_DS); 289 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info); 290 set_fs (old_fs); 291 return ret; 292 } 293 294 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act, 295 struct old_sigaction32 __user *oact) 296 { 297 struct k_sigaction new_ka, old_ka; 298 int ret; 299 300 WARN_ON_ONCE(sig >= 0); 301 sig = -sig; 302 303 if (act) { 304 compat_old_sigset_t mask; 305 u32 u_handler, u_restorer; 306 307 ret = get_user(u_handler, &act->sa_handler); 308 new_ka.sa.sa_handler = compat_ptr(u_handler); 309 ret |= __get_user(u_restorer, &act->sa_restorer); 310 new_ka.sa.sa_restorer = compat_ptr(u_restorer); 311 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); 312 ret |= __get_user(mask, &act->sa_mask); 313 if (ret) 314 return ret; 315 new_ka.ka_restorer = NULL; 316 siginitset(&new_ka.sa.sa_mask, mask); 317 } 318 319 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); 320 321 if (!ret && oact) { 322 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler); 323 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer); 324 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); 325 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); 326 } 327 328 return ret; 329 } 330 331 asmlinkage long compat_sys_rt_sigaction(int sig, 332 struct sigaction32 __user *act, 333 struct sigaction32 __user *oact, 334 void __user *restorer, 335 compat_size_t sigsetsize) 336 { 337 struct k_sigaction new_ka, old_ka; 338 int ret; 339 compat_sigset_t set32; 340 341 /* XXX: Don't preclude handling different sized sigset_t's. */ 342 if (sigsetsize != sizeof(compat_sigset_t)) 343 return -EINVAL; 344 345 if (act) { 346 u32 u_handler, u_restorer; 347 348 new_ka.ka_restorer = restorer; 349 ret = get_user(u_handler, &act->sa_handler); 350 new_ka.sa.sa_handler = compat_ptr(u_handler); 351 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t)); 352 switch (_NSIG_WORDS) { 353 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32); 354 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32); 355 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32); 356 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32); 357 } 358 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); 359 ret |= __get_user(u_restorer, &act->sa_restorer); 360 new_ka.sa.sa_restorer = compat_ptr(u_restorer); 361 if (ret) 362 return -EFAULT; 363 } 364 365 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); 366 367 if (!ret && oact) { 368 switch (_NSIG_WORDS) { 369 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3]; 370 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2]; 371 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1]; 372 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0]; 373 } 374 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler); 375 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t)); 376 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); 377 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer); 378 if (ret) 379 ret = -EFAULT; 380 } 381 382 return ret; 383 } 384 385 #ifdef CONFIG_MODULES 386 387 asmlinkage long sys32_init_module(void __user *umod, u32 len, 388 const char __user *uargs) 389 { 390 return sys_init_module(umod, len, uargs); 391 } 392 393 asmlinkage long sys32_delete_module(const char __user *name_user, 394 unsigned int flags) 395 { 396 return sys_delete_module(name_user, flags); 397 } 398 399 #else /* CONFIG_MODULES */ 400 401 asmlinkage long sys32_init_module(const char __user *name_user, 402 struct module __user *mod_user) 403 { 404 return -ENOSYS; 405 } 406 407 asmlinkage long sys32_delete_module(const char __user *name_user) 408 { 409 return -ENOSYS; 410 } 411 412 #endif /* CONFIG_MODULES */ 413 414 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd, 415 char __user *ubuf, 416 compat_size_t count, 417 unsigned long poshi, 418 unsigned long poslo) 419 { 420 return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo); 421 } 422 423 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd, 424 char __user *ubuf, 425 compat_size_t count, 426 unsigned long poshi, 427 unsigned long poslo) 428 { 429 return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo); 430 } 431 432 asmlinkage long compat_sys_readahead(int fd, 433 unsigned long offhi, 434 unsigned long offlo, 435 compat_size_t count) 436 { 437 return sys_readahead(fd, (offhi << 32) | offlo, count); 438 } 439 440 long compat_sys_fadvise64(int fd, 441 unsigned long offhi, 442 unsigned long offlo, 443 compat_size_t len, int advice) 444 { 445 return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice); 446 } 447 448 long compat_sys_fadvise64_64(int fd, 449 unsigned long offhi, unsigned long offlo, 450 unsigned long lenhi, unsigned long lenlo, 451 int advice) 452 { 453 return sys_fadvise64_64(fd, 454 (offhi << 32) | offlo, 455 (lenhi << 32) | lenlo, 456 advice); 457 } 458 459 /* This is just a version for 32-bit applications which does 460 * not force O_LARGEFILE on. 461 */ 462 463 asmlinkage long sparc32_open(const char __user *filename, 464 int flags, int mode) 465 { 466 return do_sys_open(AT_FDCWD, filename, flags, mode); 467 } 468 469 long sys32_lookup_dcookie(unsigned long cookie_high, 470 unsigned long cookie_low, 471 char __user *buf, size_t len) 472 { 473 return sys_lookup_dcookie((cookie_high << 32) | cookie_low, 474 buf, len); 475 } 476 477 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) 478 { 479 return sys_sync_file_range(fd, 480 (off_high << 32) | off_low, 481 (nb_high << 32) | nb_low, 482 flags); 483 } 484 485 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo, 486 u32 lenhi, u32 lenlo) 487 { 488 return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo, 489 ((loff_t)lenhi << 32) | lenlo); 490 } 491