Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * sys_parisc32.c: Conversion between 32bit and 64bit native syscalls. |
| 3 | * |
| 4 | * Copyright (C) 2000-2001 Hewlett Packard Company |
| 5 | * Copyright (C) 2000 John Marvin |
| 6 | * Copyright (C) 2001 Matthew Wilcox |
| 7 | * |
| 8 | * These routines maintain argument size conversion between 32bit and 64bit |
| 9 | * environment. Based heavily on sys_ia32.c and sys_sparc32.c. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/config.h> |
| 13 | #include <linux/compat.h> |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/sched.h> |
| 16 | #include <linux/fs.h> |
| 17 | #include <linux/mm.h> |
| 18 | #include <linux/file.h> |
| 19 | #include <linux/signal.h> |
| 20 | #include <linux/resource.h> |
| 21 | #include <linux/times.h> |
| 22 | #include <linux/utsname.h> |
| 23 | #include <linux/time.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/smp.h> |
| 25 | #include <linux/smp_lock.h> |
| 26 | #include <linux/sem.h> |
| 27 | #include <linux/msg.h> |
| 28 | #include <linux/shm.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/uio.h> |
| 31 | #include <linux/nfs_fs.h> |
| 32 | #include <linux/ncp_fs.h> |
| 33 | #include <linux/sunrpc/svc.h> |
| 34 | #include <linux/nfsd/nfsd.h> |
| 35 | #include <linux/nfsd/cache.h> |
| 36 | #include <linux/nfsd/xdr.h> |
| 37 | #include <linux/nfsd/syscall.h> |
| 38 | #include <linux/poll.h> |
| 39 | #include <linux/personality.h> |
| 40 | #include <linux/stat.h> |
| 41 | #include <linux/highmem.h> |
| 42 | #include <linux/highuid.h> |
| 43 | #include <linux/mman.h> |
| 44 | #include <linux/binfmts.h> |
| 45 | #include <linux/namei.h> |
| 46 | #include <linux/vfs.h> |
| 47 | #include <linux/ptrace.h> |
| 48 | #include <linux/swap.h> |
| 49 | #include <linux/syscalls.h> |
| 50 | |
| 51 | #include <asm/types.h> |
| 52 | #include <asm/uaccess.h> |
| 53 | #include <asm/semaphore.h> |
| 54 | #include <asm/mmu_context.h> |
| 55 | |
| 56 | #include "sys32.h" |
| 57 | |
| 58 | #undef DEBUG |
| 59 | |
| 60 | #ifdef DEBUG |
| 61 | #define DBG(x) printk x |
| 62 | #else |
| 63 | #define DBG(x) |
| 64 | #endif |
| 65 | |
| 66 | /* |
| 67 | * sys32_execve() executes a new program. |
| 68 | */ |
| 69 | |
| 70 | asmlinkage int sys32_execve(struct pt_regs *regs) |
| 71 | { |
| 72 | int error; |
| 73 | char *filename; |
| 74 | |
| 75 | DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26])); |
| 76 | filename = getname((const char __user *) regs->gr[26]); |
| 77 | error = PTR_ERR(filename); |
| 78 | if (IS_ERR(filename)) |
| 79 | goto out; |
| 80 | error = compat_do_execve(filename, compat_ptr(regs->gr[25]), |
| 81 | compat_ptr(regs->gr[24]), regs); |
| 82 | if (error == 0) { |
| 83 | task_lock(current); |
| 84 | current->ptrace &= ~PT_DTRACE; |
| 85 | task_unlock(current); |
| 86 | } |
| 87 | putname(filename); |
| 88 | out: |
| 89 | |
| 90 | return error; |
| 91 | } |
| 92 | |
| 93 | asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23, |
| 94 | int r22, int r21, int r20) |
| 95 | { |
| 96 | printk(KERN_ERR "%s(%d): Unimplemented 32 on 64 syscall #%d!\n", |
| 97 | current->comm, current->pid, r20); |
| 98 | return -ENOSYS; |
| 99 | } |
| 100 | |
| 101 | #ifdef CONFIG_SYSCTL |
| 102 | |
| 103 | struct __sysctl_args32 { |
| 104 | u32 name; |
| 105 | int nlen; |
| 106 | u32 oldval; |
| 107 | u32 oldlenp; |
| 108 | u32 newval; |
| 109 | u32 newlen; |
| 110 | u32 __unused[4]; |
| 111 | }; |
| 112 | |
| 113 | asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args) |
| 114 | { |
| 115 | struct __sysctl_args32 tmp; |
| 116 | int error; |
| 117 | unsigned int oldlen32; |
| 118 | size_t oldlen, *oldlenp = NULL; |
| 119 | unsigned long addr = (((long __force)&args->__unused[0]) + 7) & ~7; |
| 120 | extern int do_sysctl(int *name, int nlen, void *oldval, size_t *oldlenp, |
| 121 | void *newval, size_t newlen); |
| 122 | |
| 123 | DBG(("sysctl32(%p)\n", args)); |
| 124 | |
| 125 | if (copy_from_user(&tmp, args, sizeof(tmp))) |
| 126 | return -EFAULT; |
| 127 | |
| 128 | if (tmp.oldval && tmp.oldlenp) { |
| 129 | /* Duh, this is ugly and might not work if sysctl_args |
| 130 | is in read-only memory, but do_sysctl does indirectly |
| 131 | a lot of uaccess in both directions and we'd have to |
| 132 | basically copy the whole sysctl.c here, and |
| 133 | glibc's __sysctl uses rw memory for the structure |
| 134 | anyway. */ |
| 135 | /* a possibly better hack than this, which will avoid the |
| 136 | * problem if the struct is read only, is to push the |
| 137 | * 'oldlen' value out to the user's stack instead. -PB |
| 138 | */ |
| 139 | if (get_user(oldlen32, (u32 *)(u64)tmp.oldlenp)) |
| 140 | return -EFAULT; |
| 141 | oldlen = oldlen32; |
| 142 | if (put_user(oldlen, (size_t *)addr)) |
| 143 | return -EFAULT; |
| 144 | oldlenp = (size_t *)addr; |
| 145 | } |
| 146 | |
| 147 | lock_kernel(); |
| 148 | error = do_sysctl((int *)(u64)tmp.name, tmp.nlen, (void *)(u64)tmp.oldval, |
| 149 | oldlenp, (void *)(u64)tmp.newval, tmp.newlen); |
| 150 | unlock_kernel(); |
| 151 | if (oldlenp) { |
| 152 | if (!error) { |
| 153 | if (get_user(oldlen, (size_t *)addr)) { |
| 154 | error = -EFAULT; |
| 155 | } else { |
| 156 | oldlen32 = oldlen; |
| 157 | if (put_user(oldlen32, (u32 *)(u64)tmp.oldlenp)) |
| 158 | error = -EFAULT; |
| 159 | } |
| 160 | } |
| 161 | if (copy_to_user(&args->__unused[0], tmp.__unused, sizeof(tmp.__unused))) |
| 162 | error = -EFAULT; |
| 163 | } |
| 164 | return error; |
| 165 | } |
| 166 | |
| 167 | #endif /* CONFIG_SYSCTL */ |
| 168 | |
| 169 | asmlinkage long sys32_sched_rr_get_interval(pid_t pid, |
| 170 | struct compat_timespec __user *interval) |
| 171 | { |
| 172 | struct timespec t; |
| 173 | int ret; |
| 174 | |
| 175 | KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t); |
| 176 | if (put_compat_timespec(&t, interval)) |
| 177 | return -EFAULT; |
| 178 | return ret; |
| 179 | } |
| 180 | |
| 181 | static int |
| 182 | put_compat_timeval(struct compat_timeval __user *u, struct timeval *t) |
| 183 | { |
| 184 | struct compat_timeval t32; |
| 185 | t32.tv_sec = t->tv_sec; |
| 186 | t32.tv_usec = t->tv_usec; |
| 187 | return copy_to_user(u, &t32, sizeof t32); |
| 188 | } |
| 189 | |
| 190 | static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i) |
| 191 | { |
| 192 | long usec; |
| 193 | |
| 194 | if (__get_user(o->tv_sec, &i->tv_sec)) |
| 195 | return -EFAULT; |
| 196 | if (__get_user(usec, &i->tv_usec)) |
| 197 | return -EFAULT; |
| 198 | o->tv_nsec = usec * 1000; |
| 199 | return 0; |
| 200 | } |
| 201 | |
| 202 | asmlinkage int |
| 203 | sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) |
| 204 | { |
| 205 | extern void do_gettimeofday(struct timeval *tv); |
| 206 | |
| 207 | if (tv) { |
| 208 | struct timeval ktv; |
| 209 | do_gettimeofday(&ktv); |
| 210 | if (put_compat_timeval(tv, &ktv)) |
| 211 | return -EFAULT; |
| 212 | } |
| 213 | if (tz) { |
| 214 | extern struct timezone sys_tz; |
| 215 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) |
| 216 | return -EFAULT; |
| 217 | } |
| 218 | return 0; |
| 219 | } |
| 220 | |
| 221 | asmlinkage |
| 222 | int sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) |
| 223 | { |
| 224 | struct timespec kts; |
| 225 | struct timezone ktz; |
| 226 | |
| 227 | if (tv) { |
| 228 | if (get_ts32(&kts, tv)) |
| 229 | return -EFAULT; |
| 230 | } |
| 231 | if (tz) { |
| 232 | if (copy_from_user(&ktz, tz, sizeof(ktz))) |
| 233 | return -EFAULT; |
| 234 | } |
| 235 | |
| 236 | return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); |
| 237 | } |
| 238 | |
| 239 | int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf) |
| 240 | { |
| 241 | int err; |
| 242 | |
| 243 | if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) || |
| 244 | !new_valid_dev(stat->rdev)) |
| 245 | return -EOVERFLOW; |
| 246 | |
| 247 | err = put_user(new_encode_dev(stat->dev), &statbuf->st_dev); |
| 248 | err |= put_user(stat->ino, &statbuf->st_ino); |
| 249 | err |= put_user(stat->mode, &statbuf->st_mode); |
| 250 | err |= put_user(stat->nlink, &statbuf->st_nlink); |
| 251 | err |= put_user(0, &statbuf->st_reserved1); |
| 252 | err |= put_user(0, &statbuf->st_reserved2); |
| 253 | err |= put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev); |
| 254 | err |= put_user(stat->size, &statbuf->st_size); |
| 255 | err |= put_user(stat->atime.tv_sec, &statbuf->st_atime); |
| 256 | err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec); |
| 257 | err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime); |
| 258 | err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec); |
| 259 | err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime); |
| 260 | err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec); |
| 261 | err |= put_user(stat->blksize, &statbuf->st_blksize); |
| 262 | err |= put_user(stat->blocks, &statbuf->st_blocks); |
| 263 | err |= put_user(0, &statbuf->__unused1); |
| 264 | err |= put_user(0, &statbuf->__unused2); |
| 265 | err |= put_user(0, &statbuf->__unused3); |
| 266 | err |= put_user(0, &statbuf->__unused4); |
| 267 | err |= put_user(0, &statbuf->__unused5); |
| 268 | err |= put_user(0, &statbuf->st_fstype); /* not avail */ |
| 269 | err |= put_user(0, &statbuf->st_realdev); /* not avail */ |
| 270 | err |= put_user(0, &statbuf->st_basemode); /* not avail */ |
| 271 | err |= put_user(0, &statbuf->st_spareshort); |
| 272 | err |= put_user(stat->uid, &statbuf->st_uid); |
| 273 | err |= put_user(stat->gid, &statbuf->st_gid); |
| 274 | err |= put_user(0, &statbuf->st_spare4[0]); |
| 275 | err |= put_user(0, &statbuf->st_spare4[1]); |
| 276 | err |= put_user(0, &statbuf->st_spare4[2]); |
| 277 | |
| 278 | return err; |
| 279 | } |
| 280 | |
| 281 | struct linux32_dirent { |
| 282 | u32 d_ino; |
| 283 | compat_off_t d_off; |
| 284 | u16 d_reclen; |
| 285 | char d_name[1]; |
| 286 | }; |
| 287 | |
| 288 | struct old_linux32_dirent { |
| 289 | u32 d_ino; |
| 290 | u32 d_offset; |
| 291 | u16 d_namlen; |
| 292 | char d_name[1]; |
| 293 | }; |
| 294 | |
| 295 | struct getdents32_callback { |
| 296 | struct linux32_dirent __user * current_dir; |
| 297 | struct linux32_dirent __user * previous; |
| 298 | int count; |
| 299 | int error; |
| 300 | }; |
| 301 | |
| 302 | struct readdir32_callback { |
| 303 | struct old_linux32_dirent __user * dirent; |
| 304 | int count; |
| 305 | }; |
| 306 | |
| 307 | #define ROUND_UP(x,a) ((__typeof__(x))(((unsigned long)(x) + ((a) - 1)) & ~((a) - 1))) |
| 308 | #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de))) |
| 309 | static int |
| 310 | filldir32 (void *__buf, const char *name, int namlen, loff_t offset, ino_t ino, |
| 311 | unsigned int d_type) |
| 312 | { |
| 313 | struct linux32_dirent __user * dirent; |
| 314 | struct getdents32_callback * buf = (struct getdents32_callback *) __buf; |
| 315 | int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1, 4); |
| 316 | |
| 317 | buf->error = -EINVAL; /* only used if we fail.. */ |
| 318 | if (reclen > buf->count) |
| 319 | return -EINVAL; |
| 320 | dirent = buf->previous; |
| 321 | if (dirent) |
| 322 | put_user(offset, &dirent->d_off); |
| 323 | dirent = buf->current_dir; |
| 324 | buf->previous = dirent; |
| 325 | put_user(ino, &dirent->d_ino); |
| 326 | put_user(reclen, &dirent->d_reclen); |
| 327 | copy_to_user(dirent->d_name, name, namlen); |
| 328 | put_user(0, dirent->d_name + namlen); |
| 329 | dirent = ((void __user *)dirent) + reclen; |
| 330 | buf->current_dir = dirent; |
| 331 | buf->count -= reclen; |
| 332 | return 0; |
| 333 | } |
| 334 | |
| 335 | asmlinkage long |
| 336 | sys32_getdents (unsigned int fd, void __user * dirent, unsigned int count) |
| 337 | { |
| 338 | struct file * file; |
| 339 | struct linux32_dirent __user * lastdirent; |
| 340 | struct getdents32_callback buf; |
| 341 | int error; |
| 342 | |
| 343 | error = -EBADF; |
| 344 | file = fget(fd); |
| 345 | if (!file) |
| 346 | goto out; |
| 347 | |
| 348 | buf.current_dir = (struct linux32_dirent __user *) dirent; |
| 349 | buf.previous = NULL; |
| 350 | buf.count = count; |
| 351 | buf.error = 0; |
| 352 | |
| 353 | error = vfs_readdir(file, filldir32, &buf); |
| 354 | if (error < 0) |
| 355 | goto out_putf; |
| 356 | error = buf.error; |
| 357 | lastdirent = buf.previous; |
| 358 | if (lastdirent) { |
| 359 | put_user(file->f_pos, &lastdirent->d_off); |
| 360 | error = count - buf.count; |
| 361 | } |
| 362 | |
| 363 | out_putf: |
| 364 | fput(file); |
| 365 | out: |
| 366 | return error; |
| 367 | } |
| 368 | |
| 369 | static int |
| 370 | fillonedir32 (void * __buf, const char * name, int namlen, loff_t offset, ino_t ino, |
| 371 | unsigned int d_type) |
| 372 | { |
| 373 | struct readdir32_callback * buf = (struct readdir32_callback *) __buf; |
| 374 | struct old_linux32_dirent __user * dirent; |
| 375 | |
| 376 | if (buf->count) |
| 377 | return -EINVAL; |
| 378 | buf->count++; |
| 379 | dirent = buf->dirent; |
| 380 | put_user(ino, &dirent->d_ino); |
| 381 | put_user(offset, &dirent->d_offset); |
| 382 | put_user(namlen, &dirent->d_namlen); |
| 383 | copy_to_user(dirent->d_name, name, namlen); |
| 384 | put_user(0, dirent->d_name + namlen); |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | asmlinkage long |
| 389 | sys32_readdir (unsigned int fd, void __user * dirent, unsigned int count) |
| 390 | { |
| 391 | int error; |
| 392 | struct file * file; |
| 393 | struct readdir32_callback buf; |
| 394 | |
| 395 | error = -EBADF; |
| 396 | file = fget(fd); |
| 397 | if (!file) |
| 398 | goto out; |
| 399 | |
| 400 | buf.count = 0; |
| 401 | buf.dirent = dirent; |
| 402 | |
| 403 | error = vfs_readdir(file, fillonedir32, &buf); |
| 404 | if (error >= 0) |
| 405 | error = buf.count; |
| 406 | fput(file); |
| 407 | out: |
| 408 | return error; |
| 409 | } |
| 410 | |
| 411 | /*** copied from mips64 ***/ |
| 412 | /* |
| 413 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to |
| 414 | * 64-bit unsigned longs. |
| 415 | */ |
| 416 | |
| 417 | static inline int |
| 418 | get_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset) |
| 419 | { |
| 420 | n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32)); |
| 421 | if (ufdset) { |
| 422 | unsigned long odd; |
| 423 | |
| 424 | if (!access_ok(VERIFY_WRITE, ufdset, n*sizeof(u32))) |
| 425 | return -EFAULT; |
| 426 | |
| 427 | odd = n & 1UL; |
| 428 | n &= ~1UL; |
| 429 | while (n) { |
| 430 | unsigned long h, l; |
| 431 | __get_user(l, ufdset); |
| 432 | __get_user(h, ufdset+1); |
| 433 | ufdset += 2; |
| 434 | *fdset++ = h << 32 | l; |
| 435 | n -= 2; |
| 436 | } |
| 437 | if (odd) |
| 438 | __get_user(*fdset, ufdset); |
| 439 | } else { |
| 440 | /* Tricky, must clear full unsigned long in the |
| 441 | * kernel fdset at the end, this makes sure that |
| 442 | * actually happens. |
| 443 | */ |
| 444 | memset(fdset, 0, ((n + 1) & ~1)*sizeof(u32)); |
| 445 | } |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | static inline void |
| 450 | set_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset) |
| 451 | { |
| 452 | unsigned long odd; |
| 453 | n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32)); |
| 454 | |
| 455 | if (!ufdset) |
| 456 | return; |
| 457 | |
| 458 | odd = n & 1UL; |
| 459 | n &= ~1UL; |
| 460 | while (n) { |
| 461 | unsigned long h, l; |
| 462 | l = *fdset++; |
| 463 | h = l >> 32; |
| 464 | __put_user(l, ufdset); |
| 465 | __put_user(h, ufdset+1); |
| 466 | ufdset += 2; |
| 467 | n -= 2; |
| 468 | } |
| 469 | if (odd) |
| 470 | __put_user(*fdset, ufdset); |
| 471 | } |
| 472 | |
| 473 | struct msgbuf32 { |
| 474 | int mtype; |
| 475 | char mtext[1]; |
| 476 | }; |
| 477 | |
| 478 | asmlinkage long sys32_msgsnd(int msqid, |
| 479 | struct msgbuf32 __user *umsgp32, |
| 480 | size_t msgsz, int msgflg) |
| 481 | { |
| 482 | struct msgbuf *mb; |
| 483 | struct msgbuf32 mb32; |
| 484 | int err; |
| 485 | |
| 486 | if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL) |
| 487 | return -ENOMEM; |
| 488 | |
| 489 | err = get_user(mb32.mtype, &umsgp32->mtype); |
| 490 | mb->mtype = mb32.mtype; |
| 491 | err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz); |
| 492 | |
| 493 | if (err) |
| 494 | err = -EFAULT; |
| 495 | else |
| 496 | KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg); |
| 497 | |
| 498 | kfree(mb); |
| 499 | return err; |
| 500 | } |
| 501 | |
| 502 | asmlinkage long sys32_msgrcv(int msqid, |
| 503 | struct msgbuf32 __user *umsgp32, |
| 504 | size_t msgsz, long msgtyp, int msgflg) |
| 505 | { |
| 506 | struct msgbuf *mb; |
| 507 | struct msgbuf32 mb32; |
| 508 | int err, len; |
| 509 | |
| 510 | if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL) |
| 511 | return -ENOMEM; |
| 512 | |
| 513 | KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg); |
| 514 | |
| 515 | if (err >= 0) { |
| 516 | len = err; |
| 517 | mb32.mtype = mb->mtype; |
| 518 | err = put_user(mb32.mtype, &umsgp32->mtype); |
| 519 | err |= copy_to_user(&umsgp32->mtext, mb->mtext, len); |
| 520 | if (err) |
| 521 | err = -EFAULT; |
| 522 | else |
| 523 | err = len; |
| 524 | } |
| 525 | |
| 526 | kfree(mb); |
| 527 | return err; |
| 528 | } |
| 529 | |
| 530 | asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count) |
| 531 | { |
| 532 | mm_segment_t old_fs = get_fs(); |
| 533 | int ret; |
| 534 | off_t of; |
| 535 | |
| 536 | if (offset && get_user(of, offset)) |
| 537 | return -EFAULT; |
| 538 | |
| 539 | set_fs(KERNEL_DS); |
| 540 | ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count); |
| 541 | set_fs(old_fs); |
| 542 | |
| 543 | if (offset && put_user(of, offset)) |
| 544 | return -EFAULT; |
| 545 | |
| 546 | return ret; |
| 547 | } |
| 548 | |
| 549 | asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count) |
| 550 | { |
| 551 | mm_segment_t old_fs = get_fs(); |
| 552 | int ret; |
| 553 | loff_t lof; |
| 554 | |
| 555 | if (offset && get_user(lof, offset)) |
| 556 | return -EFAULT; |
| 557 | |
| 558 | set_fs(KERNEL_DS); |
| 559 | ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count); |
| 560 | set_fs(old_fs); |
| 561 | |
| 562 | if (offset && put_user(lof, offset)) |
| 563 | return -EFAULT; |
| 564 | |
| 565 | return ret; |
| 566 | } |
| 567 | |
| 568 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | struct sysinfo32 { |
| 570 | s32 uptime; |
| 571 | u32 loads[3]; |
| 572 | u32 totalram; |
| 573 | u32 freeram; |
| 574 | u32 sharedram; |
| 575 | u32 bufferram; |
| 576 | u32 totalswap; |
| 577 | u32 freeswap; |
| 578 | unsigned short procs; |
| 579 | u32 totalhigh; |
| 580 | u32 freehigh; |
| 581 | u32 mem_unit; |
| 582 | char _f[12]; |
| 583 | }; |
| 584 | |
| 585 | /* We used to call sys_sysinfo and translate the result. But sys_sysinfo |
| 586 | * undoes the good work done elsewhere, and rather than undoing the |
| 587 | * damage, I decided to just duplicate the code from sys_sysinfo here. |
| 588 | */ |
| 589 | |
| 590 | asmlinkage int sys32_sysinfo(struct sysinfo32 __user *info) |
| 591 | { |
| 592 | struct sysinfo val; |
| 593 | int err; |
| 594 | unsigned long seq; |
| 595 | |
| 596 | /* We don't need a memset here because we copy the |
| 597 | * struct to userspace once element at a time. |
| 598 | */ |
| 599 | |
| 600 | do { |
| 601 | seq = read_seqbegin(&xtime_lock); |
| 602 | val.uptime = jiffies / HZ; |
| 603 | |
| 604 | val.loads[0] = avenrun[0] << (SI_LOAD_SHIFT - FSHIFT); |
| 605 | val.loads[1] = avenrun[1] << (SI_LOAD_SHIFT - FSHIFT); |
| 606 | val.loads[2] = avenrun[2] << (SI_LOAD_SHIFT - FSHIFT); |
| 607 | |
| 608 | val.procs = nr_threads; |
| 609 | } while (read_seqretry(&xtime_lock, seq)); |
| 610 | |
| 611 | |
| 612 | si_meminfo(&val); |
| 613 | si_swapinfo(&val); |
| 614 | |
| 615 | err = put_user (val.uptime, &info->uptime); |
| 616 | err |= __put_user (val.loads[0], &info->loads[0]); |
| 617 | err |= __put_user (val.loads[1], &info->loads[1]); |
| 618 | err |= __put_user (val.loads[2], &info->loads[2]); |
| 619 | err |= __put_user (val.totalram, &info->totalram); |
| 620 | err |= __put_user (val.freeram, &info->freeram); |
| 621 | err |= __put_user (val.sharedram, &info->sharedram); |
| 622 | err |= __put_user (val.bufferram, &info->bufferram); |
| 623 | err |= __put_user (val.totalswap, &info->totalswap); |
| 624 | err |= __put_user (val.freeswap, &info->freeswap); |
| 625 | err |= __put_user (val.procs, &info->procs); |
| 626 | err |= __put_user (val.totalhigh, &info->totalhigh); |
| 627 | err |= __put_user (val.freehigh, &info->freehigh); |
| 628 | err |= __put_user (val.mem_unit, &info->mem_unit); |
| 629 | return err ? -EFAULT : 0; |
| 630 | } |
| 631 | |
| 632 | |
| 633 | /* lseek() needs a wrapper because 'offset' can be negative, but the top |
| 634 | * half of the argument has been zeroed by syscall.S. |
| 635 | */ |
| 636 | |
| 637 | asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin) |
| 638 | { |
| 639 | return sys_lseek(fd, offset, origin); |
| 640 | } |
| 641 | |
| 642 | asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg) |
| 643 | { |
| 644 | union semun u; |
| 645 | |
| 646 | if (cmd == SETVAL) { |
| 647 | /* Ugh. arg is a union of int,ptr,ptr,ptr, so is 8 bytes. |
| 648 | * The int should be in the first 4, but our argument |
| 649 | * frobbing has left it in the last 4. |
| 650 | */ |
| 651 | u.val = *((int *)&arg + 1); |
| 652 | return sys_semctl (semid, semnum, cmd, u); |
| 653 | } |
| 654 | return sys_semctl (semid, semnum, cmd, arg); |
| 655 | } |
| 656 | |
| 657 | long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf, |
| 658 | size_t len) |
| 659 | { |
| 660 | return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low, |
| 661 | buf, len); |
| 662 | } |