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/uio.h> 25#include <linux/nfs_fs.h> 26#include <linux/quota.h> 27#include <linux/module.h> 28#include <linux/poll.h> 29#include <linux/personality.h> 30#include <linux/stat.h> 31#include <linux/filter.h> 32#include <linux/highmem.h> 33#include <linux/highuid.h> 34#include <linux/mman.h> 35#include <linux/ipv6.h> 36#include <linux/in.h> 37#include <linux/icmpv6.h> 38#include <linux/syscalls.h> 39#include <linux/sysctl.h> 40#include <linux/binfmts.h> 41#include <linux/dnotify.h> 42#include <linux/security.h> 43#include <linux/compat.h> 44#include <linux/vfs.h> 45#include <linux/ptrace.h> 46#include <linux/slab.h> 47 48#include <asm/types.h> 49#include <asm/uaccess.h> 50#include <asm/fpumacro.h> 51#include <asm/mmu_context.h> 52#include <asm/compat_signal.h> 53 54#ifdef CONFIG_SYSVIPC 55asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth) 56{ 57 int version; 58 59 version = call >> 16; /* hack for backward compatibility */ 60 call &= 0xffff; 61 62 switch (call) { 63 case SEMTIMEDOP: 64 if (fifth) 65 /* sign extend semid */ 66 return compat_sys_semtimedop((int)first, 67 compat_ptr(ptr), second, 68 compat_ptr(fifth)); 69 /* else fall through for normal semop() */ 70 case SEMOP: 71 /* struct sembuf is the same on 32 and 64bit :)) */ 72 /* sign extend semid */ 73 return sys_semtimedop((int)first, compat_ptr(ptr), second, 74 NULL); 75 case SEMGET: 76 /* sign extend key, nsems */ 77 return sys_semget((int)first, (int)second, third); 78 case SEMCTL: 79 /* sign extend semid, semnum */ 80 return compat_sys_semctl((int)first, (int)second, third, 81 compat_ptr(ptr)); 82 83 case MSGSND: 84 /* sign extend msqid */ 85 return compat_sys_msgsnd((int)first, (int)second, third, 86 compat_ptr(ptr)); 87 case MSGRCV: 88 /* sign extend msqid, msgtyp */ 89 return compat_sys_msgrcv((int)first, second, (int)fifth, 90 third, version, compat_ptr(ptr)); 91 case MSGGET: 92 /* sign extend key */ 93 return sys_msgget((int)first, second); 94 case MSGCTL: 95 /* sign extend msqid */ 96 return compat_sys_msgctl((int)first, second, compat_ptr(ptr)); 97 98 case SHMAT: 99 /* sign extend shmid */ 100 return compat_sys_shmat((int)first, second, third, version, 101 compat_ptr(ptr)); 102 case SHMDT: 103 return sys_shmdt(compat_ptr(ptr)); 104 case SHMGET: 105 /* sign extend key_t */ 106 return sys_shmget((int)first, second, third); 107 case SHMCTL: 108 /* sign extend shmid */ 109 return compat_sys_shmctl((int)first, second, compat_ptr(ptr)); 110 111 default: 112 return -ENOSYS; 113 }; 114 115 return -ENOSYS; 116} 117#endif 118 119asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low) 120{ 121 if ((int)high < 0) 122 return -EINVAL; 123 else 124 return sys_truncate(path, (high << 32) | low); 125} 126 127asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low) 128{ 129 if ((int)high < 0) 130 return -EINVAL; 131 else 132 return sys_ftruncate(fd, (high << 32) | low); 133} 134 135static int cp_compat_stat64(struct kstat *stat, 136 struct compat_stat64 __user *statbuf) 137{ 138 int err; 139 140 err = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev); 141 err |= put_user(stat->ino, &statbuf->st_ino); 142 err |= put_user(stat->mode, &statbuf->st_mode); 143 err |= put_user(stat->nlink, &statbuf->st_nlink); 144 err |= put_user(stat->uid, &statbuf->st_uid); 145 err |= put_user(stat->gid, &statbuf->st_gid); 146 err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev); 147 err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]); 148 err |= put_user(stat->size, &statbuf->st_size); 149 err |= put_user(stat->blksize, &statbuf->st_blksize); 150 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]); 151 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]); 152 err |= put_user(stat->blocks, &statbuf->st_blocks); 153 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime); 154 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec); 155 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime); 156 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec); 157 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime); 158 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec); 159 err |= put_user(0, &statbuf->__unused4); 160 err |= put_user(0, &statbuf->__unused5); 161 162 return err; 163} 164 165asmlinkage long compat_sys_stat64(const char __user * filename, 166 struct compat_stat64 __user *statbuf) 167{ 168 struct kstat stat; 169 int error = vfs_stat(filename, &stat); 170 171 if (!error) 172 error = cp_compat_stat64(&stat, statbuf); 173 return error; 174} 175 176asmlinkage long compat_sys_lstat64(const char __user * filename, 177 struct compat_stat64 __user *statbuf) 178{ 179 struct kstat stat; 180 int error = vfs_lstat(filename, &stat); 181 182 if (!error) 183 error = cp_compat_stat64(&stat, statbuf); 184 return error; 185} 186 187asmlinkage long compat_sys_fstat64(unsigned int fd, 188 struct compat_stat64 __user * statbuf) 189{ 190 struct kstat stat; 191 int error = vfs_fstat(fd, &stat); 192 193 if (!error) 194 error = cp_compat_stat64(&stat, statbuf); 195 return error; 196} 197 198asmlinkage long compat_sys_fstatat64(unsigned int dfd, 199 const 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 211asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2) 212{ 213 return sys_sysfs(option, arg1, arg2); 214} 215 216asmlinkage 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 230asmlinkage 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 270asmlinkage 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 294asmlinkage 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 310asmlinkage 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 347asmlinkage 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 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 */ 404asmlinkage 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 } 432out: 433 return error; 434} 435 436#ifdef CONFIG_MODULES 437 438asmlinkage 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 444asmlinkage 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 452asmlinkage long sys32_init_module(const char __user *name_user, 453 struct module __user *mod_user) 454{ 455 return -ENOSYS; 456} 457 458asmlinkage long sys32_delete_module(const char __user *name_user) 459{ 460 return -ENOSYS; 461} 462 463#endif /* CONFIG_MODULES */ 464 465asmlinkage 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 474asmlinkage 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 483asmlinkage 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 491long 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 499long 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 510asmlinkage 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 533asmlinkage 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 560asmlinkage 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 566long 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 574long 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 582asmlinkage 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