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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 | /* * Conversion between 32-bit and 64-bit native system calls. * * Copyright (C) 2000 Silicon Graphics, Inc. * Written by Ulf Carlsson (ulfc@engr.sgi.com) * sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar (kanoj@sgi.com) */ #include <linux/compiler.h> #include <linux/mm.h> #include <linux/errno.h> #include <linux/file.h> #include <linux/smp_lock.h> #include <linux/highuid.h> #include <linux/resource.h> #include <linux/highmem.h> #include <linux/time.h> #include <linux/times.h> #include <linux/poll.h> #include <linux/slab.h> #include <linux/skbuff.h> #include <linux/filter.h> #include <linux/shm.h> #include <linux/sem.h> #include <linux/msg.h> #include <linux/icmpv6.h> #include <linux/syscalls.h> #include <linux/sysctl.h> #include <linux/utime.h> #include <linux/utsname.h> #include <linux/personality.h> #include <linux/dnotify.h> #include <linux/module.h> #include <linux/binfmts.h> #include <linux/security.h> #include <linux/syscalls.h> #include <linux/compat.h> #include <linux/vfs.h> #include <linux/ipc.h> #include <net/sock.h> #include <net/scm.h> #include <asm/compat-signal.h> #include <asm/sim.h> #include <asm/uaccess.h> #include <asm/mmu_context.h> #include <asm/mman.h> /* Use this to get at 32-bit user passed pointers. */ /* A() macro should be used for places where you e.g. have some internal variable u32 and just want to get rid of a compiler warning. AA() has to be used in places where you want to convert a function argument to 32bit pointer or when you e.g. access pt_regs structure and want to consider 32bit registers only. */ #define A(__x) ((unsigned long)(__x)) #define AA(__x) ((unsigned long)((int)__x)) #ifdef __MIPSEB__ #define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL)) #endif #ifdef __MIPSEL__ #define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL)) #endif /* * Revalidate the inode. This is required for proper NFS attribute caching. */ int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf) { struct compat_stat tmp; if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev)) return -EOVERFLOW; memset(&tmp, 0, sizeof(tmp)); tmp.st_dev = new_encode_dev(stat->dev); tmp.st_ino = stat->ino; if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino) return -EOVERFLOW; tmp.st_mode = stat->mode; tmp.st_nlink = stat->nlink; SET_UID(tmp.st_uid, stat->uid); SET_GID(tmp.st_gid, stat->gid); tmp.st_rdev = new_encode_dev(stat->rdev); tmp.st_size = stat->size; tmp.st_atime = stat->atime.tv_sec; tmp.st_mtime = stat->mtime.tv_sec; tmp.st_ctime = stat->ctime.tv_sec; #ifdef STAT_HAVE_NSEC tmp.st_atime_nsec = stat->atime.tv_nsec; tmp.st_mtime_nsec = stat->mtime.tv_nsec; tmp.st_ctime_nsec = stat->ctime.tv_nsec; #endif tmp.st_blocks = stat->blocks; tmp.st_blksize = stat->blksize; return copy_to_user(statbuf, &tmp, sizeof(tmp)) ? -EFAULT : 0; } SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len, unsigned long, prot, unsigned long, flags, unsigned long, fd, unsigned long, pgoff) { struct file * file = NULL; unsigned long error; error = -EINVAL; if (pgoff & (~PAGE_MASK >> 12)) goto out; pgoff >>= PAGE_SHIFT-12; if (!(flags & MAP_ANONYMOUS)) { error = -EBADF; file = fget(fd); if (!file) goto out; } flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); down_write(¤t->mm->mmap_sem); error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); up_write(¤t->mm->mmap_sem); if (file) fput(file); out: return error; } /* * sys_execve() executes a new program. */ asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs) { int error; char * filename; filename = getname(compat_ptr(regs.regs[4])); error = PTR_ERR(filename); if (IS_ERR(filename)) goto out; error = compat_do_execve(filename, compat_ptr(regs.regs[5]), compat_ptr(regs.regs[6]), ®s); putname(filename); out: return error; } #define RLIM_INFINITY32 0x7fffffff #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x) struct rlimit32 { int rlim_cur; int rlim_max; }; SYSCALL_DEFINE4(32_truncate64, const char __user *, path, unsigned long, __dummy, unsigned long, a2, unsigned long, a3) { return sys_truncate(path, merge_64(a2, a3)); } SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy, unsigned long, a2, unsigned long, a3) { return sys_ftruncate(fd, merge_64(a2, a3)); } static inline long get_tv32(struct timeval *o, struct compat_timeval __user *i) { return (!access_ok(VERIFY_READ, i, sizeof(*i)) || (__get_user(o->tv_sec, &i->tv_sec) | __get_user(o->tv_usec, &i->tv_usec))); } static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i) { return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || (__put_user(i->tv_sec, &o->tv_sec) | __put_user(i->tv_usec, &o->tv_usec))); } extern struct timezone sys_tz; asmlinkage int sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) { if (tv) { struct timeval ktv; do_gettimeofday(&ktv); if (put_tv32(tv, &ktv)) return -EFAULT; } if (tz) { if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) return -EFAULT; } return 0; } static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i) { long usec; if (!access_ok(VERIFY_READ, i, sizeof(*i))) return -EFAULT; if (__get_user(o->tv_sec, &i->tv_sec)) return -EFAULT; if (__get_user(usec, &i->tv_usec)) return -EFAULT; o->tv_nsec = usec * 1000; return 0; } asmlinkage int sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) { struct timespec kts; struct timezone ktz; if (tv) { if (get_ts32(&kts, tv)) return -EFAULT; } if (tz) { if (copy_from_user(&ktz, tz, sizeof(ktz))) return -EFAULT; } return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); } SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high, unsigned int, offset_low, loff_t __user *, result, unsigned int, origin) { return sys_llseek(fd, offset_high, offset_low, result, origin); } /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op + lseek back to original location. They fail just like lseek does on non-seekable files. */ SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count, unsigned long, unused, unsigned long, a4, unsigned long, a5) { return sys_pread64(fd, buf, count, merge_64(a4, a5)); } SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf, size_t, count, u32, unused, u64, a4, u64, a5) { return sys_pwrite64(fd, buf, count, merge_64(a4, a5)); } SYSCALL_DEFINE2(32_sched_rr_get_interval, compat_pid_t, pid, struct compat_timespec __user *, interval) { struct timespec t; int ret; mm_segment_t old_fs = get_fs(); set_fs(KERNEL_DS); ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t); set_fs(old_fs); if (put_user (t.tv_sec, &interval->tv_sec) || __put_user(t.tv_nsec, &interval->tv_nsec)) return -EFAULT; return ret; } #ifdef CONFIG_SYSVIPC SYSCALL_DEFINE6(32_ipc, u32, call, long, first, long, second, long, third, unsigned long, ptr, unsigned long, fifth) { int version, err; version = call >> 16; /* hack for backward compatibility */ call &= 0xffff; switch (call) { case SEMOP: /* struct sembuf is the same on 32 and 64bit :)) */ err = sys_semtimedop(first, compat_ptr(ptr), second, NULL); break; case SEMTIMEDOP: err = compat_sys_semtimedop(first, compat_ptr(ptr), second, compat_ptr(fifth)); break; case SEMGET: err = sys_semget(first, second, third); break; case SEMCTL: err = compat_sys_semctl(first, second, third, compat_ptr(ptr)); break; case MSGSND: err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr)); break; case MSGRCV: err = compat_sys_msgrcv(first, second, fifth, third, version, compat_ptr(ptr)); break; case MSGGET: err = sys_msgget((key_t) first, second); break; case MSGCTL: err = compat_sys_msgctl(first, second, compat_ptr(ptr)); break; case SHMAT: err = compat_sys_shmat(first, second, third, version, compat_ptr(ptr)); break; case SHMDT: err = sys_shmdt(compat_ptr(ptr)); break; case SHMGET: err = sys_shmget(first, (unsigned)second, third); break; case SHMCTL: err = compat_sys_shmctl(first, second, compat_ptr(ptr)); break; default: err = -EINVAL; break; } return err; } #else SYSCALL_DEFINE6(32_ipc, u32, call, int, first, int, second, int, third, u32, ptr, u32, fifth) { return -ENOSYS; } #endif /* CONFIG_SYSVIPC */ #ifdef CONFIG_MIPS32_N32 SYSCALL_DEFINE4(n32_semctl, int, semid, int, semnum, int, cmd, u32, arg) { /* compat_sys_semctl expects a pointer to union semun */ u32 __user *uptr = compat_alloc_user_space(sizeof(u32)); if (put_user(arg, uptr)) return -EFAULT; return compat_sys_semctl(semid, semnum, cmd, uptr); } SYSCALL_DEFINE4(n32_msgsnd, int, msqid, u32, msgp, unsigned int, msgsz, int, msgflg) { return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp)); } SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz, int, msgtyp, int, msgflg) { return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64, compat_ptr(msgp)); } #endif struct sysctl_args32 { compat_caddr_t name; int nlen; compat_caddr_t oldval; compat_caddr_t oldlenp; compat_caddr_t newval; compat_size_t newlen; unsigned int __unused[4]; }; #ifdef CONFIG_SYSCTL_SYSCALL SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args) { struct sysctl_args32 tmp; int error; size_t oldlen; size_t __user *oldlenp = NULL; unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7; if (copy_from_user(&tmp, args, sizeof(tmp))) return -EFAULT; if (tmp.oldval && tmp.oldlenp) { /* Duh, this is ugly and might not work if sysctl_args is in read-only memory, but do_sysctl does indirectly a lot of uaccess in both directions and we'd have to basically copy the whole sysctl.c here, and glibc's __sysctl uses rw memory for the structure anyway. */ if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) || put_user(oldlen, (size_t __user *)addr)) return -EFAULT; oldlenp = (size_t __user *)addr; } lock_kernel(); error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval), oldlenp, (void __user *)A(tmp.newval), tmp.newlen); unlock_kernel(); if (oldlenp) { if (!error) { if (get_user(oldlen, (size_t __user *)addr) || put_user(oldlen, (u32 __user *)A(tmp.oldlenp))) error = -EFAULT; } copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)); } return error; } #else SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args) { return -ENOSYS; } #endif /* CONFIG_SYSCTL_SYSCALL */ SYSCALL_DEFINE1(32_newuname, struct new_utsname __user *, name) { int ret = 0; down_read(&uts_sem); if (copy_to_user(name, utsname(), sizeof *name)) ret = -EFAULT; up_read(&uts_sem); if (current->personality == PER_LINUX32 && !ret) if (copy_to_user(name->machine, "mips\0\0\0", 8)) ret = -EFAULT; return ret; } SYSCALL_DEFINE1(32_personality, unsigned long, personality) { int ret; personality &= 0xffffffff; if (personality(current->personality) == PER_LINUX32 && personality == PER_LINUX) personality = PER_LINUX32; ret = sys_personality(personality); if (ret == PER_LINUX32) ret = PER_LINUX; return ret; } /* ustat compatibility */ struct ustat32 { compat_daddr_t f_tfree; compat_ino_t f_tinode; char f_fname[6]; char f_fpack[6]; }; extern asmlinkage long sys_ustat(dev_t dev, struct ustat __user * ubuf); SYSCALL_DEFINE2(32_ustat, dev_t, dev, struct ustat32 __user *, ubuf32) { int err; struct ustat tmp; struct ustat32 tmp32; mm_segment_t old_fs = get_fs(); set_fs(KERNEL_DS); err = sys_ustat(dev, (struct ustat __user *)&tmp); set_fs(old_fs); if (err) goto out; memset(&tmp32, 0, sizeof(struct ustat32)); tmp32.f_tfree = tmp.f_tfree; tmp32.f_tinode = tmp.f_tinode; err = copy_to_user(ubuf32, &tmp32, sizeof(struct ustat32)) ? -EFAULT : 0; out: return err; } SYSCALL_DEFINE4(32_sendfile, long, out_fd, long, in_fd, compat_off_t __user *, offset, s32, count) { mm_segment_t old_fs = get_fs(); int ret; off_t of; if (offset && get_user(of, offset)) return -EFAULT; set_fs(KERNEL_DS); ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count); set_fs(old_fs); if (offset && put_user(of, offset)) return -EFAULT; return ret; } asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3, size_t count) { return sys_readahead(fd, merge_64(a2, a3), count); } asmlinkage long sys32_sync_file_range(int fd, int __pad, unsigned long a2, unsigned long a3, unsigned long a4, unsigned long a5, int flags) { return sys_sync_file_range(fd, merge_64(a2, a3), merge_64(a4, a5), flags); } asmlinkage long sys32_fadvise64_64(int fd, int __pad, unsigned long a2, unsigned long a3, unsigned long a4, unsigned long a5, int flags) { return sys_fadvise64_64(fd, merge_64(a2, a3), merge_64(a4, a5), flags); } asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2, unsigned offset_a3, unsigned len_a4, unsigned len_a5) { return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3), merge_64(len_a4, len_a5)); } save_static_function(sys32_clone); static int noinline __used _sys32_clone(nabi_no_regargs struct pt_regs regs) { unsigned long clone_flags; unsigned long newsp; int __user *parent_tidptr, *child_tidptr; clone_flags = regs.regs[4]; newsp = regs.regs[5]; if (!newsp) newsp = regs.regs[29]; parent_tidptr = (int __user *) regs.regs[6]; /* Use __dummy4 instead of getting it off the stack, so that syscall() works. */ child_tidptr = (int __user *) __dummy4; return do_fork(clone_flags, newsp, ®s, 0, parent_tidptr, child_tidptr); } |