Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on |
| 3 | * sys_sparc32 |
| 4 | * |
| 5 | * Copyright (C) 2000 VA Linux Co |
| 6 | * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> |
| 7 | * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> |
| 8 | * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) |
| 9 | * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) |
| 10 | * Copyright (C) 2000 Hewlett-Packard Co. |
| 11 | * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> |
| 12 | * Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port) |
| 13 | * |
| 14 | * These routines maintain argument size conversion between 32bit and 64bit |
| 15 | * environment. In 2.5 most of this should be moved to a generic directory. |
| 16 | * |
| 17 | * This file assumes that there is a hole at the end of user address space. |
| 18 | * |
| 19 | * Some of the functions are LE specific currently. These are hopefully all marked. |
| 20 | * This should be fixed. |
| 21 | */ |
| 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/kernel.h> |
| 24 | #include <linux/sched.h> |
| 25 | #include <linux/fs.h> |
| 26 | #include <linux/file.h> |
| 27 | #include <linux/signal.h> |
| 28 | #include <linux/syscalls.h> |
| 29 | #include <linux/resource.h> |
| 30 | #include <linux/times.h> |
| 31 | #include <linux/utsname.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/smp.h> |
| 33 | #include <linux/smp_lock.h> |
| 34 | #include <linux/sem.h> |
| 35 | #include <linux/msg.h> |
| 36 | #include <linux/mm.h> |
| 37 | #include <linux/shm.h> |
| 38 | #include <linux/slab.h> |
| 39 | #include <linux/uio.h> |
| 40 | #include <linux/nfs_fs.h> |
| 41 | #include <linux/quota.h> |
| 42 | #include <linux/module.h> |
| 43 | #include <linux/sunrpc/svc.h> |
| 44 | #include <linux/nfsd/nfsd.h> |
| 45 | #include <linux/nfsd/cache.h> |
| 46 | #include <linux/nfsd/xdr.h> |
| 47 | #include <linux/nfsd/syscall.h> |
| 48 | #include <linux/poll.h> |
| 49 | #include <linux/personality.h> |
| 50 | #include <linux/stat.h> |
| 51 | #include <linux/ipc.h> |
| 52 | #include <linux/rwsem.h> |
| 53 | #include <linux/binfmts.h> |
| 54 | #include <linux/init.h> |
| 55 | #include <linux/aio_abi.h> |
| 56 | #include <linux/aio.h> |
| 57 | #include <linux/compat.h> |
| 58 | #include <linux/vfs.h> |
| 59 | #include <linux/ptrace.h> |
| 60 | #include <linux/highuid.h> |
| 61 | #include <linux/vmalloc.h> |
Andrew Morton | 9e566d8 | 2005-07-26 21:41:38 -0700 | [diff] [blame] | 62 | #include <linux/fsnotify.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | #include <asm/mman.h> |
| 64 | #include <asm/types.h> |
| 65 | #include <asm/uaccess.h> |
| 66 | #include <asm/semaphore.h> |
| 67 | #include <asm/atomic.h> |
| 68 | #include <asm/ldt.h> |
| 69 | |
| 70 | #include <net/scm.h> |
| 71 | #include <net/sock.h> |
| 72 | #include <asm/ia32.h> |
| 73 | |
| 74 | #define AA(__x) ((unsigned long)(__x)) |
| 75 | |
| 76 | int cp_compat_stat(struct kstat *kbuf, struct compat_stat __user *ubuf) |
| 77 | { |
| 78 | typeof(ubuf->st_uid) uid = 0; |
| 79 | typeof(ubuf->st_gid) gid = 0; |
| 80 | SET_UID(uid, kbuf->uid); |
| 81 | SET_GID(gid, kbuf->gid); |
| 82 | if (!old_valid_dev(kbuf->dev) || !old_valid_dev(kbuf->rdev)) |
| 83 | return -EOVERFLOW; |
| 84 | if (kbuf->size >= 0x7fffffff) |
| 85 | return -EOVERFLOW; |
| 86 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct compat_stat)) || |
| 87 | __put_user (old_encode_dev(kbuf->dev), &ubuf->st_dev) || |
| 88 | __put_user (kbuf->ino, &ubuf->st_ino) || |
| 89 | __put_user (kbuf->mode, &ubuf->st_mode) || |
| 90 | __put_user (kbuf->nlink, &ubuf->st_nlink) || |
| 91 | __put_user (uid, &ubuf->st_uid) || |
| 92 | __put_user (gid, &ubuf->st_gid) || |
| 93 | __put_user (old_encode_dev(kbuf->rdev), &ubuf->st_rdev) || |
| 94 | __put_user (kbuf->size, &ubuf->st_size) || |
| 95 | __put_user (kbuf->atime.tv_sec, &ubuf->st_atime) || |
| 96 | __put_user (kbuf->atime.tv_nsec, &ubuf->st_atime_nsec) || |
| 97 | __put_user (kbuf->mtime.tv_sec, &ubuf->st_mtime) || |
| 98 | __put_user (kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec) || |
| 99 | __put_user (kbuf->ctime.tv_sec, &ubuf->st_ctime) || |
| 100 | __put_user (kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec) || |
| 101 | __put_user (kbuf->blksize, &ubuf->st_blksize) || |
| 102 | __put_user (kbuf->blocks, &ubuf->st_blocks)) |
| 103 | return -EFAULT; |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | asmlinkage long |
| 108 | sys32_truncate64(char __user * filename, unsigned long offset_low, unsigned long offset_high) |
| 109 | { |
| 110 | return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low); |
| 111 | } |
| 112 | |
| 113 | asmlinkage long |
| 114 | sys32_ftruncate64(unsigned int fd, unsigned long offset_low, unsigned long offset_high) |
| 115 | { |
| 116 | return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low); |
| 117 | } |
| 118 | |
| 119 | /* Another set for IA32/LFS -- x86_64 struct stat is different due to |
| 120 | support for 64bit inode numbers. */ |
| 121 | |
| 122 | static int |
| 123 | cp_stat64(struct stat64 __user *ubuf, struct kstat *stat) |
| 124 | { |
| 125 | typeof(ubuf->st_uid) uid = 0; |
| 126 | typeof(ubuf->st_gid) gid = 0; |
| 127 | SET_UID(uid, stat->uid); |
| 128 | SET_GID(gid, stat->gid); |
| 129 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) || |
| 130 | __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) || |
| 131 | __put_user (stat->ino, &ubuf->__st_ino) || |
| 132 | __put_user (stat->ino, &ubuf->st_ino) || |
| 133 | __put_user (stat->mode, &ubuf->st_mode) || |
| 134 | __put_user (stat->nlink, &ubuf->st_nlink) || |
| 135 | __put_user (uid, &ubuf->st_uid) || |
| 136 | __put_user (gid, &ubuf->st_gid) || |
| 137 | __put_user (huge_encode_dev(stat->rdev), &ubuf->st_rdev) || |
| 138 | __put_user (stat->size, &ubuf->st_size) || |
| 139 | __put_user (stat->atime.tv_sec, &ubuf->st_atime) || |
| 140 | __put_user (stat->atime.tv_nsec, &ubuf->st_atime_nsec) || |
| 141 | __put_user (stat->mtime.tv_sec, &ubuf->st_mtime) || |
| 142 | __put_user (stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) || |
| 143 | __put_user (stat->ctime.tv_sec, &ubuf->st_ctime) || |
| 144 | __put_user (stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) || |
| 145 | __put_user (stat->blksize, &ubuf->st_blksize) || |
| 146 | __put_user (stat->blocks, &ubuf->st_blocks)) |
| 147 | return -EFAULT; |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | asmlinkage long |
| 152 | sys32_stat64(char __user * filename, struct stat64 __user *statbuf) |
| 153 | { |
| 154 | struct kstat stat; |
| 155 | int ret = vfs_stat(filename, &stat); |
| 156 | if (!ret) |
| 157 | ret = cp_stat64(statbuf, &stat); |
| 158 | return ret; |
| 159 | } |
| 160 | |
| 161 | asmlinkage long |
| 162 | sys32_lstat64(char __user * filename, struct stat64 __user *statbuf) |
| 163 | { |
| 164 | struct kstat stat; |
| 165 | int ret = vfs_lstat(filename, &stat); |
| 166 | if (!ret) |
| 167 | ret = cp_stat64(statbuf, &stat); |
| 168 | return ret; |
| 169 | } |
| 170 | |
| 171 | asmlinkage long |
| 172 | sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf) |
| 173 | { |
| 174 | struct kstat stat; |
| 175 | int ret = vfs_fstat(fd, &stat); |
| 176 | if (!ret) |
| 177 | ret = cp_stat64(statbuf, &stat); |
| 178 | return ret; |
| 179 | } |
| 180 | |
Ulrich Drepper | cff2b76 | 2006-02-11 17:55:47 -0800 | [diff] [blame] | 181 | asmlinkage long |
| 182 | sys32_fstatat(unsigned int dfd, char __user *filename, |
| 183 | struct stat64 __user* statbuf, int flag) |
| 184 | { |
| 185 | struct kstat stat; |
| 186 | int error = -EINVAL; |
| 187 | |
| 188 | if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) |
| 189 | goto out; |
| 190 | |
| 191 | if (flag & AT_SYMLINK_NOFOLLOW) |
| 192 | error = vfs_lstat_fd(dfd, filename, &stat); |
| 193 | else |
| 194 | error = vfs_stat_fd(dfd, filename, &stat); |
| 195 | |
| 196 | if (!error) |
| 197 | error = cp_stat64(statbuf, &stat); |
| 198 | |
| 199 | out: |
| 200 | return error; |
| 201 | } |
| 202 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | /* |
| 204 | * Linux/i386 didn't use to be able to handle more than |
| 205 | * 4 system call parameters, so these system calls used a memory |
| 206 | * block for parameter passing.. |
| 207 | */ |
| 208 | |
| 209 | struct mmap_arg_struct { |
| 210 | unsigned int addr; |
| 211 | unsigned int len; |
| 212 | unsigned int prot; |
| 213 | unsigned int flags; |
| 214 | unsigned int fd; |
| 215 | unsigned int offset; |
| 216 | }; |
| 217 | |
| 218 | asmlinkage long |
| 219 | sys32_mmap(struct mmap_arg_struct __user *arg) |
| 220 | { |
| 221 | struct mmap_arg_struct a; |
| 222 | struct file *file = NULL; |
| 223 | unsigned long retval; |
| 224 | struct mm_struct *mm ; |
| 225 | |
| 226 | if (copy_from_user(&a, arg, sizeof(a))) |
| 227 | return -EFAULT; |
| 228 | |
| 229 | if (a.offset & ~PAGE_MASK) |
| 230 | return -EINVAL; |
| 231 | |
| 232 | if (!(a.flags & MAP_ANONYMOUS)) { |
| 233 | file = fget(a.fd); |
| 234 | if (!file) |
| 235 | return -EBADF; |
| 236 | } |
| 237 | |
| 238 | mm = current->mm; |
| 239 | down_write(&mm->mmap_sem); |
| 240 | retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, a.offset>>PAGE_SHIFT); |
| 241 | if (file) |
| 242 | fput(file); |
| 243 | |
| 244 | up_write(&mm->mmap_sem); |
| 245 | |
| 246 | return retval; |
| 247 | } |
| 248 | |
| 249 | asmlinkage long |
| 250 | sys32_mprotect(unsigned long start, size_t len, unsigned long prot) |
| 251 | { |
| 252 | return sys_mprotect(start,len,prot); |
| 253 | } |
| 254 | |
| 255 | asmlinkage long |
| 256 | sys32_pipe(int __user *fd) |
| 257 | { |
| 258 | int retval; |
| 259 | int fds[2]; |
| 260 | |
| 261 | retval = do_pipe(fds); |
| 262 | if (retval) |
| 263 | goto out; |
| 264 | if (copy_to_user(fd, fds, sizeof(fds))) |
| 265 | retval = -EFAULT; |
| 266 | out: |
| 267 | return retval; |
| 268 | } |
| 269 | |
| 270 | asmlinkage long |
| 271 | sys32_rt_sigaction(int sig, struct sigaction32 __user *act, |
| 272 | struct sigaction32 __user *oact, unsigned int sigsetsize) |
| 273 | { |
| 274 | struct k_sigaction new_ka, old_ka; |
| 275 | int ret; |
| 276 | compat_sigset_t set32; |
| 277 | |
| 278 | /* XXX: Don't preclude handling different sized sigset_t's. */ |
| 279 | if (sigsetsize != sizeof(compat_sigset_t)) |
| 280 | return -EINVAL; |
| 281 | |
| 282 | if (act) { |
| 283 | compat_uptr_t handler, restorer; |
| 284 | |
| 285 | if (!access_ok(VERIFY_READ, act, sizeof(*act)) || |
| 286 | __get_user(handler, &act->sa_handler) || |
| 287 | __get_user(new_ka.sa.sa_flags, &act->sa_flags) || |
| 288 | __get_user(restorer, &act->sa_restorer)|| |
| 289 | __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t))) |
| 290 | return -EFAULT; |
| 291 | new_ka.sa.sa_handler = compat_ptr(handler); |
| 292 | new_ka.sa.sa_restorer = compat_ptr(restorer); |
| 293 | /* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */ |
| 294 | switch (_NSIG_WORDS) { |
| 295 | case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] |
| 296 | | (((long)set32.sig[7]) << 32); |
| 297 | case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] |
| 298 | | (((long)set32.sig[5]) << 32); |
| 299 | case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] |
| 300 | | (((long)set32.sig[3]) << 32); |
| 301 | case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] |
| 302 | | (((long)set32.sig[1]) << 32); |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); |
| 307 | |
| 308 | if (!ret && oact) { |
| 309 | /* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */ |
| 310 | switch (_NSIG_WORDS) { |
| 311 | case 4: |
| 312 | set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); |
| 313 | set32.sig[6] = old_ka.sa.sa_mask.sig[3]; |
| 314 | case 3: |
| 315 | set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); |
| 316 | set32.sig[4] = old_ka.sa.sa_mask.sig[2]; |
| 317 | case 2: |
| 318 | set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); |
| 319 | set32.sig[2] = old_ka.sa.sa_mask.sig[1]; |
| 320 | case 1: |
| 321 | set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); |
| 322 | set32.sig[0] = old_ka.sa.sa_mask.sig[0]; |
| 323 | } |
| 324 | if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || |
| 325 | __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) || |
| 326 | __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) || |
| 327 | __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || |
| 328 | __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t))) |
| 329 | return -EFAULT; |
| 330 | } |
| 331 | |
| 332 | return ret; |
| 333 | } |
| 334 | |
| 335 | asmlinkage long |
| 336 | sys32_sigaction (int sig, struct old_sigaction32 __user *act, struct old_sigaction32 __user *oact) |
| 337 | { |
| 338 | struct k_sigaction new_ka, old_ka; |
| 339 | int ret; |
| 340 | |
| 341 | if (act) { |
| 342 | compat_old_sigset_t mask; |
| 343 | compat_uptr_t handler, restorer; |
| 344 | |
| 345 | if (!access_ok(VERIFY_READ, act, sizeof(*act)) || |
| 346 | __get_user(handler, &act->sa_handler) || |
| 347 | __get_user(new_ka.sa.sa_flags, &act->sa_flags) || |
| 348 | __get_user(restorer, &act->sa_restorer) || |
| 349 | __get_user(mask, &act->sa_mask)) |
| 350 | return -EFAULT; |
| 351 | |
| 352 | new_ka.sa.sa_handler = compat_ptr(handler); |
| 353 | new_ka.sa.sa_restorer = compat_ptr(restorer); |
| 354 | |
| 355 | siginitset(&new_ka.sa.sa_mask, mask); |
| 356 | } |
| 357 | |
| 358 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); |
| 359 | |
| 360 | if (!ret && oact) { |
| 361 | if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || |
| 362 | __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) || |
| 363 | __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) || |
| 364 | __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || |
| 365 | __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) |
| 366 | return -EFAULT; |
| 367 | } |
| 368 | |
| 369 | return ret; |
| 370 | } |
| 371 | |
| 372 | asmlinkage long |
| 373 | sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, |
| 374 | compat_sigset_t __user *oset, unsigned int sigsetsize) |
| 375 | { |
| 376 | sigset_t s; |
| 377 | compat_sigset_t s32; |
| 378 | int ret; |
| 379 | mm_segment_t old_fs = get_fs(); |
| 380 | |
| 381 | if (set) { |
| 382 | if (copy_from_user (&s32, set, sizeof(compat_sigset_t))) |
| 383 | return -EFAULT; |
| 384 | switch (_NSIG_WORDS) { |
| 385 | case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32); |
| 386 | case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32); |
| 387 | case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32); |
| 388 | case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32); |
| 389 | } |
| 390 | } |
| 391 | set_fs (KERNEL_DS); |
| 392 | ret = sys_rt_sigprocmask(how, set ? &s : NULL, oset ? &s : NULL, |
| 393 | sigsetsize); |
| 394 | set_fs (old_fs); |
| 395 | if (ret) return ret; |
| 396 | if (oset) { |
| 397 | switch (_NSIG_WORDS) { |
| 398 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; |
| 399 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; |
| 400 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; |
| 401 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; |
| 402 | } |
| 403 | if (copy_to_user (oset, &s32, sizeof(compat_sigset_t))) |
| 404 | return -EFAULT; |
| 405 | } |
| 406 | return 0; |
| 407 | } |
| 408 | |
| 409 | static inline long |
| 410 | get_tv32(struct timeval *o, struct compat_timeval __user *i) |
| 411 | { |
| 412 | int err = -EFAULT; |
| 413 | if (access_ok(VERIFY_READ, i, sizeof(*i))) { |
| 414 | err = __get_user(o->tv_sec, &i->tv_sec); |
| 415 | err |= __get_user(o->tv_usec, &i->tv_usec); |
| 416 | } |
| 417 | return err; |
| 418 | } |
| 419 | |
| 420 | static inline long |
| 421 | put_tv32(struct compat_timeval __user *o, struct timeval *i) |
| 422 | { |
| 423 | int err = -EFAULT; |
| 424 | if (access_ok(VERIFY_WRITE, o, sizeof(*o))) { |
| 425 | err = __put_user(i->tv_sec, &o->tv_sec); |
| 426 | err |= __put_user(i->tv_usec, &o->tv_usec); |
| 427 | } |
| 428 | return err; |
| 429 | } |
| 430 | |
Thomas Gleixner | c08b8a4 | 2006-03-25 03:06:33 -0800 | [diff] [blame] | 431 | extern unsigned int alarm_setitimer(unsigned int seconds); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
| 433 | asmlinkage long |
| 434 | sys32_alarm(unsigned int seconds) |
| 435 | { |
Thomas Gleixner | c08b8a4 | 2006-03-25 03:06:33 -0800 | [diff] [blame] | 436 | return alarm_setitimer(seconds); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | } |
| 438 | |
| 439 | /* Translations due to time_t size differences. Which affects all |
| 440 | sorts of things, like timeval and itimerval. */ |
| 441 | |
| 442 | extern struct timezone sys_tz; |
| 443 | |
| 444 | asmlinkage long |
| 445 | sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) |
| 446 | { |
| 447 | if (tv) { |
| 448 | struct timeval ktv; |
| 449 | do_gettimeofday(&ktv); |
| 450 | if (put_tv32(tv, &ktv)) |
| 451 | return -EFAULT; |
| 452 | } |
| 453 | if (tz) { |
| 454 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) |
| 455 | return -EFAULT; |
| 456 | } |
| 457 | return 0; |
| 458 | } |
| 459 | |
| 460 | asmlinkage long |
| 461 | sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) |
| 462 | { |
| 463 | struct timeval ktv; |
| 464 | struct timespec kts; |
| 465 | struct timezone ktz; |
| 466 | |
| 467 | if (tv) { |
| 468 | if (get_tv32(&ktv, tv)) |
| 469 | return -EFAULT; |
| 470 | kts.tv_sec = ktv.tv_sec; |
| 471 | kts.tv_nsec = ktv.tv_usec * NSEC_PER_USEC; |
| 472 | } |
| 473 | if (tz) { |
| 474 | if (copy_from_user(&ktz, tz, sizeof(ktz))) |
| 475 | return -EFAULT; |
| 476 | } |
| 477 | |
| 478 | return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); |
| 479 | } |
| 480 | |
| 481 | struct sel_arg_struct { |
| 482 | unsigned int n; |
| 483 | unsigned int inp; |
| 484 | unsigned int outp; |
| 485 | unsigned int exp; |
| 486 | unsigned int tvp; |
| 487 | }; |
| 488 | |
| 489 | asmlinkage long |
| 490 | sys32_old_select(struct sel_arg_struct __user *arg) |
| 491 | { |
| 492 | struct sel_arg_struct a; |
| 493 | |
| 494 | if (copy_from_user(&a, arg, sizeof(a))) |
| 495 | return -EFAULT; |
| 496 | return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp), |
| 497 | compat_ptr(a.exp), compat_ptr(a.tvp)); |
| 498 | } |
| 499 | |
| 500 | extern asmlinkage long |
| 501 | compat_sys_wait4(compat_pid_t pid, compat_uint_t * stat_addr, int options, |
| 502 | struct compat_rusage *ru); |
| 503 | |
| 504 | asmlinkage long |
| 505 | sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options) |
| 506 | { |
| 507 | return compat_sys_wait4(pid, stat_addr, options, NULL); |
| 508 | } |
| 509 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | /* 32-bit timeval and related flotsam. */ |
| 511 | |
| 512 | asmlinkage long |
| 513 | sys32_sysfs(int option, u32 arg1, u32 arg2) |
| 514 | { |
| 515 | return sys_sysfs(option, arg1, arg2); |
| 516 | } |
| 517 | |
| 518 | struct sysinfo32 { |
| 519 | s32 uptime; |
| 520 | u32 loads[3]; |
| 521 | u32 totalram; |
| 522 | u32 freeram; |
| 523 | u32 sharedram; |
| 524 | u32 bufferram; |
| 525 | u32 totalswap; |
| 526 | u32 freeswap; |
| 527 | unsigned short procs; |
| 528 | unsigned short pad; |
| 529 | u32 totalhigh; |
| 530 | u32 freehigh; |
| 531 | u32 mem_unit; |
| 532 | char _f[20-2*sizeof(u32)-sizeof(int)]; |
| 533 | }; |
| 534 | |
| 535 | asmlinkage long |
| 536 | sys32_sysinfo(struct sysinfo32 __user *info) |
| 537 | { |
| 538 | struct sysinfo s; |
| 539 | int ret; |
| 540 | mm_segment_t old_fs = get_fs (); |
| 541 | int bitcount = 0; |
| 542 | |
| 543 | set_fs (KERNEL_DS); |
| 544 | ret = sys_sysinfo(&s); |
| 545 | set_fs (old_fs); |
| 546 | |
| 547 | /* Check to see if any memory value is too large for 32-bit and scale |
| 548 | * down if needed |
| 549 | */ |
| 550 | if ((s.totalram >> 32) || (s.totalswap >> 32)) { |
| 551 | while (s.mem_unit < PAGE_SIZE) { |
| 552 | s.mem_unit <<= 1; |
| 553 | bitcount++; |
| 554 | } |
| 555 | s.totalram >>= bitcount; |
| 556 | s.freeram >>= bitcount; |
| 557 | s.sharedram >>= bitcount; |
| 558 | s.bufferram >>= bitcount; |
| 559 | s.totalswap >>= bitcount; |
| 560 | s.freeswap >>= bitcount; |
| 561 | s.totalhigh >>= bitcount; |
| 562 | s.freehigh >>= bitcount; |
| 563 | } |
| 564 | |
| 565 | if (!access_ok(VERIFY_WRITE, info, sizeof(struct sysinfo32)) || |
| 566 | __put_user (s.uptime, &info->uptime) || |
| 567 | __put_user (s.loads[0], &info->loads[0]) || |
| 568 | __put_user (s.loads[1], &info->loads[1]) || |
| 569 | __put_user (s.loads[2], &info->loads[2]) || |
| 570 | __put_user (s.totalram, &info->totalram) || |
| 571 | __put_user (s.freeram, &info->freeram) || |
| 572 | __put_user (s.sharedram, &info->sharedram) || |
| 573 | __put_user (s.bufferram, &info->bufferram) || |
| 574 | __put_user (s.totalswap, &info->totalswap) || |
| 575 | __put_user (s.freeswap, &info->freeswap) || |
| 576 | __put_user (s.procs, &info->procs) || |
| 577 | __put_user (s.totalhigh, &info->totalhigh) || |
| 578 | __put_user (s.freehigh, &info->freehigh) || |
| 579 | __put_user (s.mem_unit, &info->mem_unit)) |
| 580 | return -EFAULT; |
| 581 | return 0; |
| 582 | } |
| 583 | |
| 584 | asmlinkage long |
| 585 | sys32_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval) |
| 586 | { |
| 587 | struct timespec t; |
| 588 | int ret; |
| 589 | mm_segment_t old_fs = get_fs (); |
| 590 | |
| 591 | set_fs (KERNEL_DS); |
| 592 | ret = sys_sched_rr_get_interval(pid, &t); |
| 593 | set_fs (old_fs); |
| 594 | if (put_compat_timespec(&t, interval)) |
| 595 | return -EFAULT; |
| 596 | return ret; |
| 597 | } |
| 598 | |
| 599 | asmlinkage long |
| 600 | sys32_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize) |
| 601 | { |
| 602 | sigset_t s; |
| 603 | compat_sigset_t s32; |
| 604 | int ret; |
| 605 | mm_segment_t old_fs = get_fs(); |
| 606 | |
| 607 | set_fs (KERNEL_DS); |
| 608 | ret = sys_rt_sigpending(&s, sigsetsize); |
| 609 | set_fs (old_fs); |
| 610 | if (!ret) { |
| 611 | switch (_NSIG_WORDS) { |
| 612 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; |
| 613 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; |
| 614 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; |
| 615 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; |
| 616 | } |
| 617 | if (copy_to_user (set, &s32, sizeof(compat_sigset_t))) |
| 618 | return -EFAULT; |
| 619 | } |
| 620 | return ret; |
| 621 | } |
| 622 | |
| 623 | asmlinkage long |
| 624 | sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo) |
| 625 | { |
| 626 | siginfo_t info; |
| 627 | int ret; |
| 628 | mm_segment_t old_fs = get_fs(); |
| 629 | |
| 630 | if (copy_siginfo_from_user32(&info, uinfo)) |
| 631 | return -EFAULT; |
| 632 | set_fs (KERNEL_DS); |
| 633 | ret = sys_rt_sigqueueinfo(pid, sig, &info); |
| 634 | set_fs (old_fs); |
| 635 | return ret; |
| 636 | } |
| 637 | |
| 638 | /* These are here just in case some old ia32 binary calls it. */ |
| 639 | asmlinkage long |
| 640 | sys32_pause(void) |
| 641 | { |
| 642 | current->state = TASK_INTERRUPTIBLE; |
| 643 | schedule(); |
| 644 | return -ERESTARTNOHAND; |
| 645 | } |
| 646 | |
| 647 | |
| 648 | #ifdef CONFIG_SYSCTL |
| 649 | struct sysctl_ia32 { |
| 650 | unsigned int name; |
| 651 | int nlen; |
| 652 | unsigned int oldval; |
| 653 | unsigned int oldlenp; |
| 654 | unsigned int newval; |
| 655 | unsigned int newlen; |
| 656 | unsigned int __unused[4]; |
| 657 | }; |
| 658 | |
| 659 | |
| 660 | asmlinkage long |
| 661 | sys32_sysctl(struct sysctl_ia32 __user *args32) |
| 662 | { |
| 663 | struct sysctl_ia32 a32; |
| 664 | mm_segment_t old_fs = get_fs (); |
| 665 | void __user *oldvalp, *newvalp; |
| 666 | size_t oldlen; |
| 667 | int __user *namep; |
| 668 | long ret; |
| 669 | extern int do_sysctl(int *name, int nlen, void *oldval, size_t *oldlenp, |
| 670 | void *newval, size_t newlen); |
| 671 | |
| 672 | |
| 673 | if (copy_from_user(&a32, args32, sizeof (a32))) |
| 674 | return -EFAULT; |
| 675 | |
| 676 | /* |
| 677 | * We need to pre-validate these because we have to disable address checking |
| 678 | * before calling do_sysctl() because of OLDLEN but we can't run the risk of the |
| 679 | * user specifying bad addresses here. Well, since we're dealing with 32 bit |
| 680 | * addresses, we KNOW that access_ok() will always succeed, so this is an |
| 681 | * expensive NOP, but so what... |
| 682 | */ |
| 683 | namep = compat_ptr(a32.name); |
| 684 | oldvalp = compat_ptr(a32.oldval); |
| 685 | newvalp = compat_ptr(a32.newval); |
| 686 | |
| 687 | if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp))) |
| 688 | || !access_ok(VERIFY_WRITE, namep, 0) |
| 689 | || !access_ok(VERIFY_WRITE, oldvalp, 0) |
| 690 | || !access_ok(VERIFY_WRITE, newvalp, 0)) |
| 691 | return -EFAULT; |
| 692 | |
| 693 | set_fs(KERNEL_DS); |
| 694 | lock_kernel(); |
| 695 | ret = do_sysctl(namep, a32.nlen, oldvalp, &oldlen, newvalp, (size_t) a32.newlen); |
| 696 | unlock_kernel(); |
| 697 | set_fs(old_fs); |
| 698 | |
| 699 | if (oldvalp && put_user (oldlen, (int __user *)compat_ptr(a32.oldlenp))) |
| 700 | return -EFAULT; |
| 701 | |
| 702 | return ret; |
| 703 | } |
| 704 | #endif |
| 705 | |
| 706 | /* warning: next two assume little endian */ |
| 707 | asmlinkage long |
| 708 | sys32_pread(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi) |
| 709 | { |
| 710 | return sys_pread64(fd, ubuf, count, |
| 711 | ((loff_t)AA(poshi) << 32) | AA(poslo)); |
| 712 | } |
| 713 | |
| 714 | asmlinkage long |
| 715 | sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi) |
| 716 | { |
| 717 | return sys_pwrite64(fd, ubuf, count, |
| 718 | ((loff_t)AA(poshi) << 32) | AA(poslo)); |
| 719 | } |
| 720 | |
| 721 | |
| 722 | asmlinkage long |
| 723 | sys32_personality(unsigned long personality) |
| 724 | { |
| 725 | int ret; |
| 726 | if (personality(current->personality) == PER_LINUX32 && |
| 727 | personality == PER_LINUX) |
| 728 | personality = PER_LINUX32; |
| 729 | ret = sys_personality(personality); |
| 730 | if (ret == PER_LINUX32) |
| 731 | ret = PER_LINUX; |
| 732 | return ret; |
| 733 | } |
| 734 | |
| 735 | asmlinkage long |
| 736 | sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count) |
| 737 | { |
| 738 | mm_segment_t old_fs = get_fs(); |
| 739 | int ret; |
| 740 | off_t of; |
| 741 | |
| 742 | if (offset && get_user(of, offset)) |
| 743 | return -EFAULT; |
| 744 | |
| 745 | set_fs(KERNEL_DS); |
| 746 | ret = sys_sendfile(out_fd, in_fd, offset ? &of : NULL, count); |
| 747 | set_fs(old_fs); |
| 748 | |
Tsuneo.Yoshioka@f-secure.com | 83b942b | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 749 | if (offset && put_user(of, offset)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | return -EFAULT; |
| 751 | |
| 752 | return ret; |
| 753 | } |
| 754 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len, |
| 756 | unsigned long prot, unsigned long flags, |
| 757 | unsigned long fd, unsigned long pgoff) |
| 758 | { |
| 759 | struct mm_struct *mm = current->mm; |
| 760 | unsigned long error; |
| 761 | struct file * file = NULL; |
| 762 | |
| 763 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); |
| 764 | if (!(flags & MAP_ANONYMOUS)) { |
| 765 | file = fget(fd); |
| 766 | if (!file) |
| 767 | return -EBADF; |
| 768 | } |
| 769 | |
| 770 | down_write(&mm->mmap_sem); |
| 771 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); |
| 772 | up_write(&mm->mmap_sem); |
| 773 | |
| 774 | if (file) |
| 775 | fput(file); |
| 776 | return error; |
| 777 | } |
| 778 | |
| 779 | asmlinkage long sys32_olduname(struct oldold_utsname __user * name) |
| 780 | { |
| 781 | int error; |
| 782 | |
| 783 | if (!name) |
| 784 | return -EFAULT; |
| 785 | if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname))) |
| 786 | return -EFAULT; |
| 787 | |
| 788 | down_read(&uts_sem); |
| 789 | |
| 790 | error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN); |
| 791 | __put_user(0,name->sysname+__OLD_UTS_LEN); |
| 792 | __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN); |
| 793 | __put_user(0,name->nodename+__OLD_UTS_LEN); |
| 794 | __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN); |
| 795 | __put_user(0,name->release+__OLD_UTS_LEN); |
| 796 | __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN); |
| 797 | __put_user(0,name->version+__OLD_UTS_LEN); |
| 798 | { |
| 799 | char *arch = "x86_64"; |
| 800 | if (personality(current->personality) == PER_LINUX32) |
| 801 | arch = "i686"; |
| 802 | |
| 803 | __copy_to_user(&name->machine,arch,strlen(arch)+1); |
| 804 | } |
| 805 | |
| 806 | up_read(&uts_sem); |
| 807 | |
| 808 | error = error ? -EFAULT : 0; |
| 809 | |
| 810 | return error; |
| 811 | } |
| 812 | |
| 813 | long sys32_uname(struct old_utsname __user * name) |
| 814 | { |
| 815 | int err; |
| 816 | if (!name) |
| 817 | return -EFAULT; |
| 818 | down_read(&uts_sem); |
| 819 | err=copy_to_user(name, &system_utsname, sizeof (*name)); |
| 820 | up_read(&uts_sem); |
| 821 | if (personality(current->personality) == PER_LINUX32) |
| 822 | err |= copy_to_user(&name->machine, "i686", 5); |
| 823 | return err?-EFAULT:0; |
| 824 | } |
| 825 | |
| 826 | long sys32_ustat(unsigned dev, struct ustat32 __user *u32p) |
| 827 | { |
| 828 | struct ustat u; |
| 829 | mm_segment_t seg; |
| 830 | int ret; |
| 831 | |
| 832 | seg = get_fs(); |
| 833 | set_fs(KERNEL_DS); |
| 834 | ret = sys_ustat(dev,&u); |
| 835 | set_fs(seg); |
| 836 | if (ret >= 0) { |
| 837 | if (!access_ok(VERIFY_WRITE,u32p,sizeof(struct ustat32)) || |
| 838 | __put_user((__u32) u.f_tfree, &u32p->f_tfree) || |
| 839 | __put_user((__u32) u.f_tinode, &u32p->f_tfree) || |
| 840 | __copy_to_user(&u32p->f_fname, u.f_fname, sizeof(u.f_fname)) || |
| 841 | __copy_to_user(&u32p->f_fpack, u.f_fpack, sizeof(u.f_fpack))) |
| 842 | ret = -EFAULT; |
| 843 | } |
| 844 | return ret; |
| 845 | } |
| 846 | |
| 847 | asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv, |
| 848 | compat_uptr_t __user *envp, struct pt_regs *regs) |
| 849 | { |
| 850 | long error; |
| 851 | char * filename; |
| 852 | |
| 853 | filename = getname(name); |
| 854 | error = PTR_ERR(filename); |
| 855 | if (IS_ERR(filename)) |
| 856 | return error; |
| 857 | error = compat_do_execve(filename, argv, envp, regs); |
| 858 | if (error == 0) { |
| 859 | task_lock(current); |
| 860 | current->ptrace &= ~PT_DTRACE; |
| 861 | task_unlock(current); |
| 862 | } |
| 863 | putname(filename); |
| 864 | return error; |
| 865 | } |
| 866 | |
| 867 | asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp, |
| 868 | struct pt_regs *regs) |
| 869 | { |
| 870 | void __user *parent_tid = (void __user *)regs->rdx; |
| 871 | void __user *child_tid = (void __user *)regs->rdi; |
| 872 | if (!newsp) |
| 873 | newsp = regs->rsp; |
| 874 | return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid); |
| 875 | } |
| 876 | |
| 877 | /* |
| 878 | * Some system calls that need sign extended arguments. This could be done by a generic wrapper. |
| 879 | */ |
| 880 | |
| 881 | long sys32_lseek (unsigned int fd, int offset, unsigned int whence) |
| 882 | { |
| 883 | return sys_lseek(fd, offset, whence); |
| 884 | } |
| 885 | |
| 886 | long sys32_kill(int pid, int sig) |
| 887 | { |
| 888 | return sys_kill(pid, sig); |
| 889 | } |
| 890 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high, |
| 892 | __u32 len_low, __u32 len_high, int advice) |
| 893 | { |
| 894 | return sys_fadvise64_64(fd, |
| 895 | (((u64)offset_high)<<32) | offset_low, |
| 896 | (((u64)len_high)<<32) | len_low, |
| 897 | advice); |
| 898 | } |
| 899 | |
| 900 | long sys32_vm86_warning(void) |
| 901 | { |
| 902 | struct task_struct *me = current; |
| 903 | static char lastcomm[sizeof(me->comm)]; |
| 904 | if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) { |
Andi Kleen | bebfa10 | 2006-06-26 13:56:52 +0200 | [diff] [blame] | 905 | compat_printk(KERN_INFO "%s: vm86 mode not supported on 64 bit kernel\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | me->comm); |
| 907 | strncpy(lastcomm, me->comm, sizeof(lastcomm)); |
| 908 | } |
| 909 | return -ENOSYS; |
| 910 | } |
| 911 | |
| 912 | long sys32_lookup_dcookie(u32 addr_low, u32 addr_high, |
| 913 | char __user * buf, size_t len) |
| 914 | { |
| 915 | return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len); |
| 916 | } |
| 917 | |