1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_COMPAT_H 3 #define _LINUX_COMPAT_H 4 /* 5 * These are the type definitions for the architecture specific 6 * syscall compatibility layer. 7 */ 8 9 #include <linux/types.h> 10 #include <linux/compat_time.h> 11 12 #include <linux/stat.h> 13 #include <linux/param.h> /* for HZ */ 14 #include <linux/sem.h> 15 #include <linux/socket.h> 16 #include <linux/if.h> 17 #include <linux/fs.h> 18 #include <linux/aio_abi.h> /* for aio_context_t */ 19 #include <linux/uaccess.h> 20 #include <linux/unistd.h> 21 22 #include <asm/compat.h> 23 24 #ifdef CONFIG_COMPAT 25 #include <asm/siginfo.h> 26 #include <asm/signal.h> 27 #endif 28 29 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 30 /* 31 * It may be useful for an architecture to override the definitions of the 32 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular 33 * to use a different calling convention for syscalls. To allow for that, 34 + the prototypes for the compat_sys_*() functions below will *not* be included 35 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 36 */ 37 #include <asm/syscall_wrapper.h> 38 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 39 40 #ifndef COMPAT_USE_64BIT_TIME 41 #define COMPAT_USE_64BIT_TIME 0 42 #endif 43 44 #ifndef __SC_DELOUSE 45 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v)) 46 #endif 47 48 #ifndef COMPAT_SYSCALL_DEFINE0 49 #define COMPAT_SYSCALL_DEFINE0(name) \ 50 asmlinkage long compat_sys_##name(void); \ 51 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \ 52 asmlinkage long compat_sys_##name(void) 53 #endif /* COMPAT_SYSCALL_DEFINE0 */ 54 55 #define COMPAT_SYSCALL_DEFINE1(name, ...) \ 56 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) 57 #define COMPAT_SYSCALL_DEFINE2(name, ...) \ 58 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__) 59 #define COMPAT_SYSCALL_DEFINE3(name, ...) \ 60 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) 61 #define COMPAT_SYSCALL_DEFINE4(name, ...) \ 62 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__) 63 #define COMPAT_SYSCALL_DEFINE5(name, ...) \ 64 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__) 65 #define COMPAT_SYSCALL_DEFINE6(name, ...) \ 66 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__) 67 68 /* 69 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which 70 * sign-extends 32-bit ints to longs whenever needed. The actual work is 71 * done within __do_compat_sys_*(). 72 */ 73 #ifndef COMPAT_SYSCALL_DEFINEx 74 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ 75 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \ 76 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \ 77 __attribute__((alias(__stringify(__se_compat_sys##name)))); \ 78 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \ 79 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\ 80 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ 81 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 82 { \ 83 return __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\ 84 } \ 85 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) 86 #endif /* COMPAT_SYSCALL_DEFINEx */ 87 88 #ifdef CONFIG_COMPAT 89 90 #ifndef compat_user_stack_pointer 91 #define compat_user_stack_pointer() current_user_stack_pointer() 92 #endif 93 #ifndef compat_sigaltstack /* we'll need that for MIPS */ 94 typedef struct compat_sigaltstack { 95 compat_uptr_t ss_sp; 96 int ss_flags; 97 compat_size_t ss_size; 98 } compat_stack_t; 99 #endif 100 101 #define compat_jiffies_to_clock_t(x) \ 102 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) 103 104 typedef __compat_uid32_t compat_uid_t; 105 typedef __compat_gid32_t compat_gid_t; 106 107 typedef compat_ulong_t compat_aio_context_t; 108 109 struct compat_sel_arg_struct; 110 struct rusage; 111 112 struct compat_itimerspec { 113 struct compat_timespec it_interval; 114 struct compat_timespec it_value; 115 }; 116 117 struct compat_utimbuf { 118 compat_time_t actime; 119 compat_time_t modtime; 120 }; 121 122 struct compat_itimerval { 123 struct compat_timeval it_interval; 124 struct compat_timeval it_value; 125 }; 126 127 struct itimerval; 128 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *); 129 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *); 130 131 struct compat_tms { 132 compat_clock_t tms_utime; 133 compat_clock_t tms_stime; 134 compat_clock_t tms_cutime; 135 compat_clock_t tms_cstime; 136 }; 137 138 struct compat_timex { 139 compat_uint_t modes; 140 compat_long_t offset; 141 compat_long_t freq; 142 compat_long_t maxerror; 143 compat_long_t esterror; 144 compat_int_t status; 145 compat_long_t constant; 146 compat_long_t precision; 147 compat_long_t tolerance; 148 struct compat_timeval time; 149 compat_long_t tick; 150 compat_long_t ppsfreq; 151 compat_long_t jitter; 152 compat_int_t shift; 153 compat_long_t stabil; 154 compat_long_t jitcnt; 155 compat_long_t calcnt; 156 compat_long_t errcnt; 157 compat_long_t stbcnt; 158 compat_int_t tai; 159 160 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32; 161 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32; 162 compat_int_t:32; compat_int_t:32; compat_int_t:32; 163 }; 164 165 struct timex; 166 int compat_get_timex(struct timex *, const struct compat_timex __user *); 167 int compat_put_timex(struct compat_timex __user *, const struct timex *); 168 169 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) 170 171 typedef struct { 172 compat_sigset_word sig[_COMPAT_NSIG_WORDS]; 173 } compat_sigset_t; 174 175 struct compat_sigaction { 176 #ifndef __ARCH_HAS_IRIX_SIGACTION 177 compat_uptr_t sa_handler; 178 compat_ulong_t sa_flags; 179 #else 180 compat_uint_t sa_flags; 181 compat_uptr_t sa_handler; 182 #endif 183 #ifdef __ARCH_HAS_SA_RESTORER 184 compat_uptr_t sa_restorer; 185 #endif 186 compat_sigset_t sa_mask __packed; 187 }; 188 189 typedef union compat_sigval { 190 compat_int_t sival_int; 191 compat_uptr_t sival_ptr; 192 } compat_sigval_t; 193 194 typedef struct compat_siginfo { 195 int si_signo; 196 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 197 int si_errno; 198 int si_code; 199 #else 200 int si_code; 201 int si_errno; 202 #endif 203 204 union { 205 int _pad[128/sizeof(int) - 3]; 206 207 /* kill() */ 208 struct { 209 compat_pid_t _pid; /* sender's pid */ 210 __compat_uid32_t _uid; /* sender's uid */ 211 } _kill; 212 213 /* POSIX.1b timers */ 214 struct { 215 compat_timer_t _tid; /* timer id */ 216 int _overrun; /* overrun count */ 217 compat_sigval_t _sigval; /* same as below */ 218 } _timer; 219 220 /* POSIX.1b signals */ 221 struct { 222 compat_pid_t _pid; /* sender's pid */ 223 __compat_uid32_t _uid; /* sender's uid */ 224 compat_sigval_t _sigval; 225 } _rt; 226 227 /* SIGCHLD */ 228 struct { 229 compat_pid_t _pid; /* which child */ 230 __compat_uid32_t _uid; /* sender's uid */ 231 int _status; /* exit code */ 232 compat_clock_t _utime; 233 compat_clock_t _stime; 234 } _sigchld; 235 236 #ifdef CONFIG_X86_X32_ABI 237 /* SIGCHLD (x32 version) */ 238 struct { 239 compat_pid_t _pid; /* which child */ 240 __compat_uid32_t _uid; /* sender's uid */ 241 int _status; /* exit code */ 242 compat_s64 _utime; 243 compat_s64 _stime; 244 } _sigchld_x32; 245 #endif 246 247 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */ 248 struct { 249 compat_uptr_t _addr; /* faulting insn/memory ref. */ 250 #ifdef __ARCH_SI_TRAPNO 251 int _trapno; /* TRAP # which caused the signal */ 252 #endif 253 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ 254 sizeof(short) : __alignof__(compat_uptr_t)) 255 union { 256 /* 257 * used when si_code=BUS_MCEERR_AR or 258 * used when si_code=BUS_MCEERR_AO 259 */ 260 short int _addr_lsb; /* Valid LSB of the reported address. */ 261 /* used when si_code=SEGV_BNDERR */ 262 struct { 263 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD]; 264 compat_uptr_t _lower; 265 compat_uptr_t _upper; 266 } _addr_bnd; 267 /* used when si_code=SEGV_PKUERR */ 268 struct { 269 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD]; 270 u32 _pkey; 271 } _addr_pkey; 272 }; 273 } _sigfault; 274 275 /* SIGPOLL */ 276 struct { 277 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 278 int _fd; 279 } _sigpoll; 280 281 struct { 282 compat_uptr_t _call_addr; /* calling user insn */ 283 int _syscall; /* triggering system call number */ 284 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 285 } _sigsys; 286 } _sifields; 287 } compat_siginfo_t; 288 289 /* 290 * These functions operate on 32- or 64-bit specs depending on 291 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments. 292 */ 293 extern int compat_get_timespec(struct timespec *, const void __user *); 294 extern int compat_put_timespec(const struct timespec *, void __user *); 295 extern int compat_get_timeval(struct timeval *, const void __user *); 296 extern int compat_put_timeval(const struct timeval *, void __user *); 297 extern int get_compat_itimerspec64(struct itimerspec64 *its, 298 const struct compat_itimerspec __user *uits); 299 extern int put_compat_itimerspec64(const struct itimerspec64 *its, 300 struct compat_itimerspec __user *uits); 301 302 struct compat_iovec { 303 compat_uptr_t iov_base; 304 compat_size_t iov_len; 305 }; 306 307 struct compat_rlimit { 308 compat_ulong_t rlim_cur; 309 compat_ulong_t rlim_max; 310 }; 311 312 struct compat_rusage { 313 struct compat_timeval ru_utime; 314 struct compat_timeval ru_stime; 315 compat_long_t ru_maxrss; 316 compat_long_t ru_ixrss; 317 compat_long_t ru_idrss; 318 compat_long_t ru_isrss; 319 compat_long_t ru_minflt; 320 compat_long_t ru_majflt; 321 compat_long_t ru_nswap; 322 compat_long_t ru_inblock; 323 compat_long_t ru_oublock; 324 compat_long_t ru_msgsnd; 325 compat_long_t ru_msgrcv; 326 compat_long_t ru_nsignals; 327 compat_long_t ru_nvcsw; 328 compat_long_t ru_nivcsw; 329 }; 330 331 extern int put_compat_rusage(const struct rusage *, 332 struct compat_rusage __user *); 333 334 struct compat_siginfo; 335 struct __compat_aio_sigset; 336 337 struct compat_dirent { 338 u32 d_ino; 339 compat_off_t d_off; 340 u16 d_reclen; 341 char d_name[256]; 342 }; 343 344 struct compat_ustat { 345 compat_daddr_t f_tfree; 346 compat_ino_t f_tinode; 347 char f_fname[6]; 348 char f_fpack[6]; 349 }; 350 351 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 352 353 typedef struct compat_sigevent { 354 compat_sigval_t sigev_value; 355 compat_int_t sigev_signo; 356 compat_int_t sigev_notify; 357 union { 358 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 359 compat_int_t _tid; 360 361 struct { 362 compat_uptr_t _function; 363 compat_uptr_t _attribute; 364 } _sigev_thread; 365 } _sigev_un; 366 } compat_sigevent_t; 367 368 struct compat_ifmap { 369 compat_ulong_t mem_start; 370 compat_ulong_t mem_end; 371 unsigned short base_addr; 372 unsigned char irq; 373 unsigned char dma; 374 unsigned char port; 375 }; 376 377 struct compat_if_settings { 378 unsigned int type; /* Type of physical device or protocol */ 379 unsigned int size; /* Size of the data allocated by the caller */ 380 compat_uptr_t ifs_ifsu; /* union of pointers */ 381 }; 382 383 struct compat_ifreq { 384 union { 385 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 386 } ifr_ifrn; 387 union { 388 struct sockaddr ifru_addr; 389 struct sockaddr ifru_dstaddr; 390 struct sockaddr ifru_broadaddr; 391 struct sockaddr ifru_netmask; 392 struct sockaddr ifru_hwaddr; 393 short ifru_flags; 394 compat_int_t ifru_ivalue; 395 compat_int_t ifru_mtu; 396 struct compat_ifmap ifru_map; 397 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 398 char ifru_newname[IFNAMSIZ]; 399 compat_caddr_t ifru_data; 400 struct compat_if_settings ifru_settings; 401 } ifr_ifru; 402 }; 403 404 struct compat_ifconf { 405 compat_int_t ifc_len; /* size of buffer */ 406 compat_caddr_t ifcbuf; 407 }; 408 409 struct compat_robust_list { 410 compat_uptr_t next; 411 }; 412 413 struct compat_robust_list_head { 414 struct compat_robust_list list; 415 compat_long_t futex_offset; 416 compat_uptr_t list_op_pending; 417 }; 418 419 #ifdef CONFIG_COMPAT_OLD_SIGACTION 420 struct compat_old_sigaction { 421 compat_uptr_t sa_handler; 422 compat_old_sigset_t sa_mask; 423 compat_ulong_t sa_flags; 424 compat_uptr_t sa_restorer; 425 }; 426 #endif 427 428 struct compat_keyctl_kdf_params { 429 compat_uptr_t hashname; 430 compat_uptr_t otherinfo; 431 __u32 otherinfolen; 432 __u32 __spare[8]; 433 }; 434 435 struct compat_statfs; 436 struct compat_statfs64; 437 struct compat_old_linux_dirent; 438 struct compat_linux_dirent; 439 struct linux_dirent64; 440 struct compat_msghdr; 441 struct compat_mmsghdr; 442 struct compat_sysinfo; 443 struct compat_sysctl_args; 444 struct compat_kexec_segment; 445 struct compat_mq_attr; 446 struct compat_msgbuf; 447 448 extern void compat_exit_robust_list(struct task_struct *curr); 449 450 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 451 452 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 453 454 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 455 unsigned long bitmap_size); 456 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 457 unsigned long bitmap_size); 458 int copy_siginfo_from_user32(siginfo_t *to, const struct compat_siginfo __user *from); 459 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from); 460 int get_compat_sigevent(struct sigevent *event, 461 const struct compat_sigevent __user *u_event); 462 463 static inline int compat_timeval_compare(struct compat_timeval *lhs, 464 struct compat_timeval *rhs) 465 { 466 if (lhs->tv_sec < rhs->tv_sec) 467 return -1; 468 if (lhs->tv_sec > rhs->tv_sec) 469 return 1; 470 return lhs->tv_usec - rhs->tv_usec; 471 } 472 473 static inline int compat_timespec_compare(struct compat_timespec *lhs, 474 struct compat_timespec *rhs) 475 { 476 if (lhs->tv_sec < rhs->tv_sec) 477 return -1; 478 if (lhs->tv_sec > rhs->tv_sec) 479 return 1; 480 return lhs->tv_nsec - rhs->tv_nsec; 481 } 482 483 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 484 485 /* 486 * Defined inline such that size can be compile time constant, which avoids 487 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 488 */ 489 static inline int 490 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 491 unsigned int size) 492 { 493 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 494 #ifdef __BIG_ENDIAN 495 compat_sigset_t v; 496 switch (_NSIG_WORDS) { 497 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 498 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 499 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 500 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 501 } 502 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 503 #else 504 return copy_to_user(compat, set, size) ? -EFAULT : 0; 505 #endif 506 } 507 508 extern int compat_ptrace_request(struct task_struct *child, 509 compat_long_t request, 510 compat_ulong_t addr, compat_ulong_t data); 511 512 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 513 compat_ulong_t addr, compat_ulong_t data); 514 515 struct epoll_event; /* fortunately, this one is fixed-layout */ 516 517 extern ssize_t compat_rw_copy_check_uvector(int type, 518 const struct compat_iovec __user *uvector, 519 unsigned long nr_segs, 520 unsigned long fast_segs, struct iovec *fast_pointer, 521 struct iovec **ret_pointer); 522 523 extern void __user *compat_alloc_user_space(unsigned long len); 524 525 int compat_restore_altstack(const compat_stack_t __user *uss); 526 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 527 #define compat_save_altstack_ex(uss, sp) do { \ 528 compat_stack_t __user *__uss = uss; \ 529 struct task_struct *t = current; \ 530 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \ 531 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \ 532 put_user_ex(t->sas_ss_size, &__uss->ss_size); \ 533 if (t->sas_ss_flags & SS_AUTODISARM) \ 534 sas_ss_reset(t); \ 535 } while (0); 536 537 /* 538 * These syscall function prototypes are kept in the same order as 539 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 540 * go below. 541 * 542 * Please note that these prototypes here are only provided for information 543 * purposes, for static analysis, and for linking from the syscall table. 544 * These functions should not be called elsewhere from kernel code. 545 * 546 * As the syscall calling convention may be different from the default 547 * for architectures overriding the syscall calling convention, do not 548 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 549 */ 550 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 551 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 552 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 553 u32 __user *iocb); 554 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id, 555 compat_long_t min_nr, 556 compat_long_t nr, 557 struct io_event __user *events, 558 struct compat_timespec __user *timeout); 559 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 560 compat_long_t min_nr, 561 compat_long_t nr, 562 struct io_event __user *events, 563 struct compat_timespec __user *timeout, 564 const struct __compat_aio_sigset __user *usig); 565 566 /* fs/cookies.c */ 567 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 568 569 /* fs/eventpoll.c */ 570 asmlinkage long compat_sys_epoll_pwait(int epfd, 571 struct epoll_event __user *events, 572 int maxevents, int timeout, 573 const compat_sigset_t __user *sigmask, 574 compat_size_t sigsetsize); 575 576 /* fs/fcntl.c */ 577 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 578 compat_ulong_t arg); 579 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 580 compat_ulong_t arg); 581 582 /* fs/ioctl.c */ 583 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 584 compat_ulong_t arg); 585 586 /* fs/namespace.c */ 587 asmlinkage long compat_sys_mount(const char __user *dev_name, 588 const char __user *dir_name, 589 const char __user *type, compat_ulong_t flags, 590 const void __user *data); 591 592 /* fs/open.c */ 593 asmlinkage long compat_sys_statfs(const char __user *pathname, 594 struct compat_statfs __user *buf); 595 asmlinkage long compat_sys_statfs64(const char __user *pathname, 596 compat_size_t sz, 597 struct compat_statfs64 __user *buf); 598 asmlinkage long compat_sys_fstatfs(unsigned int fd, 599 struct compat_statfs __user *buf); 600 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 601 struct compat_statfs64 __user *buf); 602 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 603 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 604 /* No generic prototype for truncate64, ftruncate64, fallocate */ 605 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 606 int flags, umode_t mode); 607 608 /* fs/readdir.c */ 609 asmlinkage long compat_sys_getdents(unsigned int fd, 610 struct compat_linux_dirent __user *dirent, 611 unsigned int count); 612 613 /* fs/read_write.c */ 614 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 615 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd, 616 const struct compat_iovec __user *vec, compat_ulong_t vlen); 617 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd, 618 const struct compat_iovec __user *vec, compat_ulong_t vlen); 619 /* No generic prototype for pread64 and pwrite64 */ 620 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 621 const struct compat_iovec __user *vec, 622 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 623 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 624 const struct compat_iovec __user *vec, 625 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 626 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 627 asmlinkage long compat_sys_preadv64(unsigned long fd, 628 const struct compat_iovec __user *vec, 629 unsigned long vlen, loff_t pos); 630 #endif 631 632 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 633 asmlinkage long compat_sys_pwritev64(unsigned long fd, 634 const struct compat_iovec __user *vec, 635 unsigned long vlen, loff_t pos); 636 #endif 637 638 /* fs/sendfile.c */ 639 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 640 compat_off_t __user *offset, compat_size_t count); 641 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 642 compat_loff_t __user *offset, compat_size_t count); 643 644 /* fs/select.c */ 645 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, 646 compat_ulong_t __user *outp, 647 compat_ulong_t __user *exp, 648 struct compat_timespec __user *tsp, 649 void __user *sig); 650 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, 651 unsigned int nfds, 652 struct compat_timespec __user *tsp, 653 const compat_sigset_t __user *sigmask, 654 compat_size_t sigsetsize); 655 656 /* fs/signalfd.c */ 657 asmlinkage long compat_sys_signalfd4(int ufd, 658 const compat_sigset_t __user *sigmask, 659 compat_size_t sigsetsize, int flags); 660 661 /* fs/splice.c */ 662 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *, 663 unsigned int nr_segs, unsigned int flags); 664 665 /* fs/stat.c */ 666 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 667 const char __user *filename, 668 struct compat_stat __user *statbuf, 669 int flag); 670 asmlinkage long compat_sys_newfstat(unsigned int fd, 671 struct compat_stat __user *statbuf); 672 673 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 674 675 /* fs/timerfd.c */ 676 asmlinkage long compat_sys_timerfd_gettime(int ufd, 677 struct compat_itimerspec __user *otmr); 678 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, 679 const struct compat_itimerspec __user *utmr, 680 struct compat_itimerspec __user *otmr); 681 682 /* fs/utimes.c */ 683 asmlinkage long compat_sys_utimensat(unsigned int dfd, 684 const char __user *filename, 685 struct compat_timespec __user *t, 686 int flags); 687 688 /* kernel/exit.c */ 689 asmlinkage long compat_sys_waitid(int, compat_pid_t, 690 struct compat_siginfo __user *, int, 691 struct compat_rusage __user *); 692 693 694 695 /* kernel/futex.c */ 696 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val, 697 struct compat_timespec __user *utime, u32 __user *uaddr2, 698 u32 val3); 699 asmlinkage long 700 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 701 compat_size_t len); 702 asmlinkage long 703 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 704 compat_size_t __user *len_ptr); 705 706 /* kernel/hrtimer.c */ 707 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp, 708 struct compat_timespec __user *rmtp); 709 710 /* kernel/itimer.c */ 711 asmlinkage long compat_sys_getitimer(int which, 712 struct compat_itimerval __user *it); 713 asmlinkage long compat_sys_setitimer(int which, 714 struct compat_itimerval __user *in, 715 struct compat_itimerval __user *out); 716 717 /* kernel/kexec.c */ 718 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 719 compat_ulong_t nr_segments, 720 struct compat_kexec_segment __user *, 721 compat_ulong_t flags); 722 723 /* kernel/posix-timers.c */ 724 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 725 struct compat_sigevent __user *timer_event_spec, 726 timer_t __user *created_timer_id); 727 asmlinkage long compat_sys_timer_gettime(timer_t timer_id, 728 struct compat_itimerspec __user *setting); 729 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags, 730 struct compat_itimerspec __user *new, 731 struct compat_itimerspec __user *old); 732 asmlinkage long compat_sys_clock_settime(clockid_t which_clock, 733 struct compat_timespec __user *tp); 734 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock, 735 struct compat_timespec __user *tp); 736 asmlinkage long compat_sys_clock_getres(clockid_t which_clock, 737 struct compat_timespec __user *tp); 738 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, 739 struct compat_timespec __user *rqtp, 740 struct compat_timespec __user *rmtp); 741 742 /* kernel/ptrace.c */ 743 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 744 compat_long_t addr, compat_long_t data); 745 746 /* kernel/sched/core.c */ 747 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 748 unsigned int len, 749 compat_ulong_t __user *user_mask_ptr); 750 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 751 unsigned int len, 752 compat_ulong_t __user *user_mask_ptr); 753 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, 754 struct compat_timespec __user *interval); 755 756 /* kernel/signal.c */ 757 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 758 compat_stack_t __user *uoss_ptr); 759 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 760 compat_size_t sigsetsize); 761 #ifndef CONFIG_ODD_RT_SIGACTION 762 asmlinkage long compat_sys_rt_sigaction(int, 763 const struct compat_sigaction __user *, 764 struct compat_sigaction __user *, 765 compat_size_t); 766 #endif 767 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 768 compat_sigset_t __user *oset, 769 compat_size_t sigsetsize); 770 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 771 compat_size_t sigsetsize); 772 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese, 773 struct compat_siginfo __user *uinfo, 774 struct compat_timespec __user *uts, compat_size_t sigsetsize); 775 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 776 struct compat_siginfo __user *uinfo); 777 /* No generic prototype for rt_sigreturn */ 778 779 /* kernel/sys.c */ 780 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 781 asmlinkage long compat_sys_getrlimit(unsigned int resource, 782 struct compat_rlimit __user *rlim); 783 asmlinkage long compat_sys_setrlimit(unsigned int resource, 784 struct compat_rlimit __user *rlim); 785 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 786 787 /* kernel/time.c */ 788 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, 789 struct timezone __user *tz); 790 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, 791 struct timezone __user *tz); 792 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp); 793 794 /* kernel/timer.c */ 795 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 796 797 /* ipc/mqueue.c */ 798 asmlinkage long compat_sys_mq_open(const char __user *u_name, 799 int oflag, compat_mode_t mode, 800 struct compat_mq_attr __user *u_attr); 801 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes, 802 const char __user *u_msg_ptr, 803 compat_size_t msg_len, unsigned int msg_prio, 804 const struct compat_timespec __user *u_abs_timeout); 805 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes, 806 char __user *u_msg_ptr, 807 compat_size_t msg_len, unsigned int __user *u_msg_prio, 808 const struct compat_timespec __user *u_abs_timeout); 809 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 810 const struct compat_sigevent __user *u_notification); 811 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 812 const struct compat_mq_attr __user *u_mqstat, 813 struct compat_mq_attr __user *u_omqstat); 814 815 /* ipc/msg.c */ 816 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 817 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 818 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 819 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 820 compat_ssize_t msgsz, int msgflg); 821 822 /* ipc/sem.c */ 823 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 824 asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, 825 unsigned nsems, const struct compat_timespec __user *timeout); 826 827 /* ipc/shm.c */ 828 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 829 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 830 831 /* net/socket.c */ 832 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 833 unsigned flags, struct sockaddr __user *addr, 834 int __user *addrlen); 835 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 836 char __user *optval, unsigned int optlen); 837 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 838 char __user *optval, int __user *optlen); 839 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 840 unsigned flags); 841 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 842 unsigned int flags); 843 844 /* mm/filemap.c: No generic prototype for readahead */ 845 846 /* security/keys/keyctl.c */ 847 asmlinkage long compat_sys_keyctl(u32 option, 848 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 849 850 /* arch/example/kernel/sys_example.c */ 851 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 852 const compat_uptr_t __user *envp); 853 854 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 855 856 /* mm/, CONFIG_MMU only */ 857 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 858 compat_ulong_t mode, 859 compat_ulong_t __user *nmask, 860 compat_ulong_t maxnode, compat_ulong_t flags); 861 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 862 compat_ulong_t __user *nmask, 863 compat_ulong_t maxnode, 864 compat_ulong_t addr, 865 compat_ulong_t flags); 866 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 867 compat_ulong_t maxnode); 868 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 869 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 870 const compat_ulong_t __user *new_nodes); 871 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 872 __u32 __user *pages, 873 const int __user *nodes, 874 int __user *status, 875 int flags); 876 877 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 878 compat_pid_t pid, int sig, 879 struct compat_siginfo __user *uinfo); 880 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, 881 unsigned vlen, unsigned int flags, 882 struct compat_timespec __user *timeout); 883 asmlinkage long compat_sys_wait4(compat_pid_t pid, 884 compat_uint_t __user *stat_addr, int options, 885 struct compat_rusage __user *ru); 886 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 887 int, const char __user *); 888 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 889 struct file_handle __user *handle, 890 int flags); 891 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock, 892 struct compat_timex __user *tp); 893 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 894 unsigned vlen, unsigned int flags); 895 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid, 896 const struct compat_iovec __user *lvec, 897 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 898 compat_ulong_t riovcnt, compat_ulong_t flags); 899 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid, 900 const struct compat_iovec __user *lvec, 901 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 902 compat_ulong_t riovcnt, compat_ulong_t flags); 903 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 904 const compat_uptr_t __user *argv, 905 const compat_uptr_t __user *envp, int flags); 906 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 907 const struct compat_iovec __user *vec, 908 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 909 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 910 const struct compat_iovec __user *vec, 911 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 912 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 913 asmlinkage long compat_sys_readv64v2(unsigned long fd, 914 const struct compat_iovec __user *vec, 915 unsigned long vlen, loff_t pos, rwf_t flags); 916 #endif 917 918 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 919 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 920 const struct compat_iovec __user *vec, 921 unsigned long vlen, loff_t pos, rwf_t flags); 922 #endif 923 924 925 /* 926 * Deprecated system calls which are still defined in 927 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 928 */ 929 930 /* __ARCH_WANT_SYSCALL_NO_AT */ 931 asmlinkage long compat_sys_open(const char __user *filename, int flags, 932 umode_t mode); 933 asmlinkage long compat_sys_utimes(const char __user *filename, 934 struct compat_timeval __user *t); 935 936 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 937 asmlinkage long compat_sys_signalfd(int ufd, 938 const compat_sigset_t __user *sigmask, 939 compat_size_t sigsetsize); 940 941 /* __ARCH_WANT_SYSCALL_OFF_T */ 942 asmlinkage long compat_sys_newstat(const char __user *filename, 943 struct compat_stat __user *statbuf); 944 asmlinkage long compat_sys_newlstat(const char __user *filename, 945 struct compat_stat __user *statbuf); 946 947 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 948 asmlinkage long compat_sys_time(compat_time_t __user *tloc); 949 asmlinkage long compat_sys_utime(const char __user *filename, 950 struct compat_utimbuf __user *t); 951 asmlinkage long compat_sys_futimesat(unsigned int dfd, 952 const char __user *filename, 953 struct compat_timeval __user *t); 954 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 955 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 956 struct compat_timeval __user *tvp); 957 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 958 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 959 unsigned flags); 960 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args); 961 962 /* obsolete: fs/readdir.c */ 963 asmlinkage long compat_sys_old_readdir(unsigned int fd, 964 struct compat_old_linux_dirent __user *, 965 unsigned int count); 966 967 /* obsolete: fs/select.c */ 968 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 969 970 /* obsolete: ipc */ 971 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 972 973 /* obsolete: kernel/signal.c */ 974 #ifdef __ARCH_WANT_SYS_SIGPENDING 975 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 976 #endif 977 978 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 979 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 980 compat_old_sigset_t __user *oset); 981 #endif 982 #ifdef CONFIG_COMPAT_OLD_SIGACTION 983 asmlinkage long compat_sys_sigaction(int sig, 984 const struct compat_old_sigaction __user *act, 985 struct compat_old_sigaction __user *oact); 986 #endif 987 988 /* obsolete: kernel/time/time.c */ 989 asmlinkage long compat_sys_stime(compat_time_t __user *tptr); 990 991 /* obsolete: net/socket.c */ 992 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 993 994 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 995 996 997 /* 998 * For most but not all architectures, "am I in a compat syscall?" and 999 * "am I a compat task?" are the same question. For architectures on which 1000 * they aren't the same question, arch code can override in_compat_syscall. 1001 */ 1002 1003 #ifndef in_compat_syscall 1004 static inline bool in_compat_syscall(void) { return is_compat_task(); } 1005 #endif 1006 1007 /** 1008 * ns_to_compat_timeval - Compat version of ns_to_timeval 1009 * @nsec: the nanoseconds value to be converted 1010 * 1011 * Returns the compat_timeval representation of the nsec parameter. 1012 */ 1013 static inline struct compat_timeval ns_to_compat_timeval(s64 nsec) 1014 { 1015 struct timeval tv; 1016 struct compat_timeval ctv; 1017 1018 tv = ns_to_timeval(nsec); 1019 ctv.tv_sec = tv.tv_sec; 1020 ctv.tv_usec = tv.tv_usec; 1021 1022 return ctv; 1023 } 1024 1025 #else /* !CONFIG_COMPAT */ 1026 1027 #define is_compat_task() (0) 1028 #ifndef in_compat_syscall 1029 static inline bool in_compat_syscall(void) { return false; } 1030 #endif 1031 1032 #endif /* CONFIG_COMPAT */ 1033 1034 #endif /* _LINUX_COMPAT_H */ 1035