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 __diag_push(); \ 76 __diag_ignore(GCC, 8, "-Wattribute-alias", \ 77 "Type aliasing is used to sanitize syscall arguments");\ 78 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \ 79 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \ 80 __attribute__((alias(__stringify(__se_compat_sys##name)))); \ 81 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \ 82 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\ 83 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ 84 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 85 { \ 86 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\ 87 __MAP(x,__SC_TEST,__VA_ARGS__); \ 88 return ret; \ 89 } \ 90 __diag_pop(); \ 91 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) 92 #endif /* COMPAT_SYSCALL_DEFINEx */ 93 94 #ifdef CONFIG_COMPAT 95 96 #ifndef compat_user_stack_pointer 97 #define compat_user_stack_pointer() current_user_stack_pointer() 98 #endif 99 #ifndef compat_sigaltstack /* we'll need that for MIPS */ 100 typedef struct compat_sigaltstack { 101 compat_uptr_t ss_sp; 102 int ss_flags; 103 compat_size_t ss_size; 104 } compat_stack_t; 105 #endif 106 107 #define compat_jiffies_to_clock_t(x) \ 108 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) 109 110 typedef __compat_uid32_t compat_uid_t; 111 typedef __compat_gid32_t compat_gid_t; 112 113 typedef compat_ulong_t compat_aio_context_t; 114 115 struct compat_sel_arg_struct; 116 struct rusage; 117 118 struct compat_itimerspec { 119 struct compat_timespec it_interval; 120 struct compat_timespec it_value; 121 }; 122 123 struct compat_utimbuf { 124 compat_time_t actime; 125 compat_time_t modtime; 126 }; 127 128 struct compat_itimerval { 129 struct compat_timeval it_interval; 130 struct compat_timeval it_value; 131 }; 132 133 struct itimerval; 134 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *); 135 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *); 136 137 struct compat_tms { 138 compat_clock_t tms_utime; 139 compat_clock_t tms_stime; 140 compat_clock_t tms_cutime; 141 compat_clock_t tms_cstime; 142 }; 143 144 struct compat_timex { 145 compat_uint_t modes; 146 compat_long_t offset; 147 compat_long_t freq; 148 compat_long_t maxerror; 149 compat_long_t esterror; 150 compat_int_t status; 151 compat_long_t constant; 152 compat_long_t precision; 153 compat_long_t tolerance; 154 struct compat_timeval time; 155 compat_long_t tick; 156 compat_long_t ppsfreq; 157 compat_long_t jitter; 158 compat_int_t shift; 159 compat_long_t stabil; 160 compat_long_t jitcnt; 161 compat_long_t calcnt; 162 compat_long_t errcnt; 163 compat_long_t stbcnt; 164 compat_int_t tai; 165 166 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32; 167 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32; 168 compat_int_t:32; compat_int_t:32; compat_int_t:32; 169 }; 170 171 struct timex; 172 int compat_get_timex(struct timex *, const struct compat_timex __user *); 173 int compat_put_timex(struct compat_timex __user *, const struct timex *); 174 175 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) 176 177 typedef struct { 178 compat_sigset_word sig[_COMPAT_NSIG_WORDS]; 179 } compat_sigset_t; 180 181 struct compat_sigaction { 182 #ifndef __ARCH_HAS_IRIX_SIGACTION 183 compat_uptr_t sa_handler; 184 compat_ulong_t sa_flags; 185 #else 186 compat_uint_t sa_flags; 187 compat_uptr_t sa_handler; 188 #endif 189 #ifdef __ARCH_HAS_SA_RESTORER 190 compat_uptr_t sa_restorer; 191 #endif 192 compat_sigset_t sa_mask __packed; 193 }; 194 195 typedef union compat_sigval { 196 compat_int_t sival_int; 197 compat_uptr_t sival_ptr; 198 } compat_sigval_t; 199 200 typedef struct compat_siginfo { 201 int si_signo; 202 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 203 int si_errno; 204 int si_code; 205 #else 206 int si_code; 207 int si_errno; 208 #endif 209 210 union { 211 int _pad[128/sizeof(int) - 3]; 212 213 /* kill() */ 214 struct { 215 compat_pid_t _pid; /* sender's pid */ 216 __compat_uid32_t _uid; /* sender's uid */ 217 } _kill; 218 219 /* POSIX.1b timers */ 220 struct { 221 compat_timer_t _tid; /* timer id */ 222 int _overrun; /* overrun count */ 223 compat_sigval_t _sigval; /* same as below */ 224 } _timer; 225 226 /* POSIX.1b signals */ 227 struct { 228 compat_pid_t _pid; /* sender's pid */ 229 __compat_uid32_t _uid; /* sender's uid */ 230 compat_sigval_t _sigval; 231 } _rt; 232 233 /* SIGCHLD */ 234 struct { 235 compat_pid_t _pid; /* which child */ 236 __compat_uid32_t _uid; /* sender's uid */ 237 int _status; /* exit code */ 238 compat_clock_t _utime; 239 compat_clock_t _stime; 240 } _sigchld; 241 242 #ifdef CONFIG_X86_X32_ABI 243 /* SIGCHLD (x32 version) */ 244 struct { 245 compat_pid_t _pid; /* which child */ 246 __compat_uid32_t _uid; /* sender's uid */ 247 int _status; /* exit code */ 248 compat_s64 _utime; 249 compat_s64 _stime; 250 } _sigchld_x32; 251 #endif 252 253 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */ 254 struct { 255 compat_uptr_t _addr; /* faulting insn/memory ref. */ 256 #ifdef __ARCH_SI_TRAPNO 257 int _trapno; /* TRAP # which caused the signal */ 258 #endif 259 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ 260 sizeof(short) : __alignof__(compat_uptr_t)) 261 union { 262 /* 263 * used when si_code=BUS_MCEERR_AR or 264 * used when si_code=BUS_MCEERR_AO 265 */ 266 short int _addr_lsb; /* Valid LSB of the reported address. */ 267 /* used when si_code=SEGV_BNDERR */ 268 struct { 269 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD]; 270 compat_uptr_t _lower; 271 compat_uptr_t _upper; 272 } _addr_bnd; 273 /* used when si_code=SEGV_PKUERR */ 274 struct { 275 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD]; 276 u32 _pkey; 277 } _addr_pkey; 278 }; 279 } _sigfault; 280 281 /* SIGPOLL */ 282 struct { 283 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 284 int _fd; 285 } _sigpoll; 286 287 struct { 288 compat_uptr_t _call_addr; /* calling user insn */ 289 int _syscall; /* triggering system call number */ 290 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 291 } _sigsys; 292 } _sifields; 293 } compat_siginfo_t; 294 295 /* 296 * These functions operate on 32- or 64-bit specs depending on 297 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments. 298 */ 299 extern int compat_get_timespec(struct timespec *, const void __user *); 300 extern int compat_put_timespec(const struct timespec *, void __user *); 301 extern int compat_get_timeval(struct timeval *, const void __user *); 302 extern int compat_put_timeval(const struct timeval *, void __user *); 303 extern int get_compat_itimerspec64(struct itimerspec64 *its, 304 const struct compat_itimerspec __user *uits); 305 extern int put_compat_itimerspec64(const struct itimerspec64 *its, 306 struct compat_itimerspec __user *uits); 307 308 struct compat_iovec { 309 compat_uptr_t iov_base; 310 compat_size_t iov_len; 311 }; 312 313 struct compat_rlimit { 314 compat_ulong_t rlim_cur; 315 compat_ulong_t rlim_max; 316 }; 317 318 struct compat_rusage { 319 struct compat_timeval ru_utime; 320 struct compat_timeval ru_stime; 321 compat_long_t ru_maxrss; 322 compat_long_t ru_ixrss; 323 compat_long_t ru_idrss; 324 compat_long_t ru_isrss; 325 compat_long_t ru_minflt; 326 compat_long_t ru_majflt; 327 compat_long_t ru_nswap; 328 compat_long_t ru_inblock; 329 compat_long_t ru_oublock; 330 compat_long_t ru_msgsnd; 331 compat_long_t ru_msgrcv; 332 compat_long_t ru_nsignals; 333 compat_long_t ru_nvcsw; 334 compat_long_t ru_nivcsw; 335 }; 336 337 extern int put_compat_rusage(const struct rusage *, 338 struct compat_rusage __user *); 339 340 struct compat_siginfo; 341 struct __compat_aio_sigset; 342 343 struct compat_dirent { 344 u32 d_ino; 345 compat_off_t d_off; 346 u16 d_reclen; 347 char d_name[256]; 348 }; 349 350 struct compat_ustat { 351 compat_daddr_t f_tfree; 352 compat_ino_t f_tinode; 353 char f_fname[6]; 354 char f_fpack[6]; 355 }; 356 357 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 358 359 typedef struct compat_sigevent { 360 compat_sigval_t sigev_value; 361 compat_int_t sigev_signo; 362 compat_int_t sigev_notify; 363 union { 364 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 365 compat_int_t _tid; 366 367 struct { 368 compat_uptr_t _function; 369 compat_uptr_t _attribute; 370 } _sigev_thread; 371 } _sigev_un; 372 } compat_sigevent_t; 373 374 struct compat_ifmap { 375 compat_ulong_t mem_start; 376 compat_ulong_t mem_end; 377 unsigned short base_addr; 378 unsigned char irq; 379 unsigned char dma; 380 unsigned char port; 381 }; 382 383 struct compat_if_settings { 384 unsigned int type; /* Type of physical device or protocol */ 385 unsigned int size; /* Size of the data allocated by the caller */ 386 compat_uptr_t ifs_ifsu; /* union of pointers */ 387 }; 388 389 struct compat_ifreq { 390 union { 391 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 392 } ifr_ifrn; 393 union { 394 struct sockaddr ifru_addr; 395 struct sockaddr ifru_dstaddr; 396 struct sockaddr ifru_broadaddr; 397 struct sockaddr ifru_netmask; 398 struct sockaddr ifru_hwaddr; 399 short ifru_flags; 400 compat_int_t ifru_ivalue; 401 compat_int_t ifru_mtu; 402 struct compat_ifmap ifru_map; 403 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 404 char ifru_newname[IFNAMSIZ]; 405 compat_caddr_t ifru_data; 406 struct compat_if_settings ifru_settings; 407 } ifr_ifru; 408 }; 409 410 struct compat_ifconf { 411 compat_int_t ifc_len; /* size of buffer */ 412 compat_caddr_t ifcbuf; 413 }; 414 415 struct compat_robust_list { 416 compat_uptr_t next; 417 }; 418 419 struct compat_robust_list_head { 420 struct compat_robust_list list; 421 compat_long_t futex_offset; 422 compat_uptr_t list_op_pending; 423 }; 424 425 #ifdef CONFIG_COMPAT_OLD_SIGACTION 426 struct compat_old_sigaction { 427 compat_uptr_t sa_handler; 428 compat_old_sigset_t sa_mask; 429 compat_ulong_t sa_flags; 430 compat_uptr_t sa_restorer; 431 }; 432 #endif 433 434 struct compat_keyctl_kdf_params { 435 compat_uptr_t hashname; 436 compat_uptr_t otherinfo; 437 __u32 otherinfolen; 438 __u32 __spare[8]; 439 }; 440 441 struct compat_statfs; 442 struct compat_statfs64; 443 struct compat_old_linux_dirent; 444 struct compat_linux_dirent; 445 struct linux_dirent64; 446 struct compat_msghdr; 447 struct compat_mmsghdr; 448 struct compat_sysinfo; 449 struct compat_sysctl_args; 450 struct compat_kexec_segment; 451 struct compat_mq_attr; 452 struct compat_msgbuf; 453 454 extern void compat_exit_robust_list(struct task_struct *curr); 455 456 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 457 458 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 459 460 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 461 unsigned long bitmap_size); 462 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 463 unsigned long bitmap_size); 464 int copy_siginfo_from_user32(siginfo_t *to, const struct compat_siginfo __user *from); 465 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from); 466 int get_compat_sigevent(struct sigevent *event, 467 const struct compat_sigevent __user *u_event); 468 469 static inline int compat_timeval_compare(struct compat_timeval *lhs, 470 struct compat_timeval *rhs) 471 { 472 if (lhs->tv_sec < rhs->tv_sec) 473 return -1; 474 if (lhs->tv_sec > rhs->tv_sec) 475 return 1; 476 return lhs->tv_usec - rhs->tv_usec; 477 } 478 479 static inline int compat_timespec_compare(struct compat_timespec *lhs, 480 struct compat_timespec *rhs) 481 { 482 if (lhs->tv_sec < rhs->tv_sec) 483 return -1; 484 if (lhs->tv_sec > rhs->tv_sec) 485 return 1; 486 return lhs->tv_nsec - rhs->tv_nsec; 487 } 488 489 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 490 491 /* 492 * Defined inline such that size can be compile time constant, which avoids 493 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 494 */ 495 static inline int 496 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 497 unsigned int size) 498 { 499 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 500 #ifdef __BIG_ENDIAN 501 compat_sigset_t v; 502 switch (_NSIG_WORDS) { 503 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 504 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 505 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 506 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 507 } 508 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 509 #else 510 return copy_to_user(compat, set, size) ? -EFAULT : 0; 511 #endif 512 } 513 514 extern int compat_ptrace_request(struct task_struct *child, 515 compat_long_t request, 516 compat_ulong_t addr, compat_ulong_t data); 517 518 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 519 compat_ulong_t addr, compat_ulong_t data); 520 521 struct epoll_event; /* fortunately, this one is fixed-layout */ 522 523 extern ssize_t compat_rw_copy_check_uvector(int type, 524 const struct compat_iovec __user *uvector, 525 unsigned long nr_segs, 526 unsigned long fast_segs, struct iovec *fast_pointer, 527 struct iovec **ret_pointer); 528 529 extern void __user *compat_alloc_user_space(unsigned long len); 530 531 int compat_restore_altstack(const compat_stack_t __user *uss); 532 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 533 #define compat_save_altstack_ex(uss, sp) do { \ 534 compat_stack_t __user *__uss = uss; \ 535 struct task_struct *t = current; \ 536 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \ 537 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \ 538 put_user_ex(t->sas_ss_size, &__uss->ss_size); \ 539 if (t->sas_ss_flags & SS_AUTODISARM) \ 540 sas_ss_reset(t); \ 541 } while (0); 542 543 /* 544 * These syscall function prototypes are kept in the same order as 545 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 546 * go below. 547 * 548 * Please note that these prototypes here are only provided for information 549 * purposes, for static analysis, and for linking from the syscall table. 550 * These functions should not be called elsewhere from kernel code. 551 * 552 * As the syscall calling convention may be different from the default 553 * for architectures overriding the syscall calling convention, do not 554 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 555 */ 556 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 557 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 558 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 559 u32 __user *iocb); 560 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id, 561 compat_long_t min_nr, 562 compat_long_t nr, 563 struct io_event __user *events, 564 struct compat_timespec __user *timeout); 565 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 566 compat_long_t min_nr, 567 compat_long_t nr, 568 struct io_event __user *events, 569 struct compat_timespec __user *timeout, 570 const struct __compat_aio_sigset __user *usig); 571 572 /* fs/cookies.c */ 573 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 574 575 /* fs/eventpoll.c */ 576 asmlinkage long compat_sys_epoll_pwait(int epfd, 577 struct epoll_event __user *events, 578 int maxevents, int timeout, 579 const compat_sigset_t __user *sigmask, 580 compat_size_t sigsetsize); 581 582 /* fs/fcntl.c */ 583 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 584 compat_ulong_t arg); 585 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 586 compat_ulong_t arg); 587 588 /* fs/ioctl.c */ 589 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 590 compat_ulong_t arg); 591 592 /* fs/namespace.c */ 593 asmlinkage long compat_sys_mount(const char __user *dev_name, 594 const char __user *dir_name, 595 const char __user *type, compat_ulong_t flags, 596 const void __user *data); 597 598 /* fs/open.c */ 599 asmlinkage long compat_sys_statfs(const char __user *pathname, 600 struct compat_statfs __user *buf); 601 asmlinkage long compat_sys_statfs64(const char __user *pathname, 602 compat_size_t sz, 603 struct compat_statfs64 __user *buf); 604 asmlinkage long compat_sys_fstatfs(unsigned int fd, 605 struct compat_statfs __user *buf); 606 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 607 struct compat_statfs64 __user *buf); 608 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 609 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 610 /* No generic prototype for truncate64, ftruncate64, fallocate */ 611 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 612 int flags, umode_t mode); 613 614 /* fs/readdir.c */ 615 asmlinkage long compat_sys_getdents(unsigned int fd, 616 struct compat_linux_dirent __user *dirent, 617 unsigned int count); 618 619 /* fs/read_write.c */ 620 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 621 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd, 622 const struct compat_iovec __user *vec, compat_ulong_t vlen); 623 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd, 624 const struct compat_iovec __user *vec, compat_ulong_t vlen); 625 /* No generic prototype for pread64 and pwrite64 */ 626 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 627 const struct compat_iovec __user *vec, 628 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 629 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 630 const struct compat_iovec __user *vec, 631 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 632 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 633 asmlinkage long compat_sys_preadv64(unsigned long fd, 634 const struct compat_iovec __user *vec, 635 unsigned long vlen, loff_t pos); 636 #endif 637 638 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 639 asmlinkage long compat_sys_pwritev64(unsigned long fd, 640 const struct compat_iovec __user *vec, 641 unsigned long vlen, loff_t pos); 642 #endif 643 644 /* fs/sendfile.c */ 645 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 646 compat_off_t __user *offset, compat_size_t count); 647 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 648 compat_loff_t __user *offset, compat_size_t count); 649 650 /* fs/select.c */ 651 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, 652 compat_ulong_t __user *outp, 653 compat_ulong_t __user *exp, 654 struct compat_timespec __user *tsp, 655 void __user *sig); 656 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, 657 unsigned int nfds, 658 struct compat_timespec __user *tsp, 659 const compat_sigset_t __user *sigmask, 660 compat_size_t sigsetsize); 661 662 /* fs/signalfd.c */ 663 asmlinkage long compat_sys_signalfd4(int ufd, 664 const compat_sigset_t __user *sigmask, 665 compat_size_t sigsetsize, int flags); 666 667 /* fs/splice.c */ 668 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *, 669 unsigned int nr_segs, unsigned int flags); 670 671 /* fs/stat.c */ 672 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 673 const char __user *filename, 674 struct compat_stat __user *statbuf, 675 int flag); 676 asmlinkage long compat_sys_newfstat(unsigned int fd, 677 struct compat_stat __user *statbuf); 678 679 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 680 681 /* fs/timerfd.c */ 682 asmlinkage long compat_sys_timerfd_gettime(int ufd, 683 struct compat_itimerspec __user *otmr); 684 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, 685 const struct compat_itimerspec __user *utmr, 686 struct compat_itimerspec __user *otmr); 687 688 /* fs/utimes.c */ 689 asmlinkage long compat_sys_utimensat(unsigned int dfd, 690 const char __user *filename, 691 struct compat_timespec __user *t, 692 int flags); 693 694 /* kernel/exit.c */ 695 asmlinkage long compat_sys_waitid(int, compat_pid_t, 696 struct compat_siginfo __user *, int, 697 struct compat_rusage __user *); 698 699 700 701 /* kernel/futex.c */ 702 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val, 703 struct compat_timespec __user *utime, u32 __user *uaddr2, 704 u32 val3); 705 asmlinkage long 706 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 707 compat_size_t len); 708 asmlinkage long 709 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 710 compat_size_t __user *len_ptr); 711 712 /* kernel/hrtimer.c */ 713 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp, 714 struct compat_timespec __user *rmtp); 715 716 /* kernel/itimer.c */ 717 asmlinkage long compat_sys_getitimer(int which, 718 struct compat_itimerval __user *it); 719 asmlinkage long compat_sys_setitimer(int which, 720 struct compat_itimerval __user *in, 721 struct compat_itimerval __user *out); 722 723 /* kernel/kexec.c */ 724 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 725 compat_ulong_t nr_segments, 726 struct compat_kexec_segment __user *, 727 compat_ulong_t flags); 728 729 /* kernel/posix-timers.c */ 730 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 731 struct compat_sigevent __user *timer_event_spec, 732 timer_t __user *created_timer_id); 733 asmlinkage long compat_sys_timer_gettime(timer_t timer_id, 734 struct compat_itimerspec __user *setting); 735 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags, 736 struct compat_itimerspec __user *new, 737 struct compat_itimerspec __user *old); 738 asmlinkage long compat_sys_clock_settime(clockid_t which_clock, 739 struct compat_timespec __user *tp); 740 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock, 741 struct compat_timespec __user *tp); 742 asmlinkage long compat_sys_clock_getres(clockid_t which_clock, 743 struct compat_timespec __user *tp); 744 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, 745 struct compat_timespec __user *rqtp, 746 struct compat_timespec __user *rmtp); 747 748 /* kernel/ptrace.c */ 749 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 750 compat_long_t addr, compat_long_t data); 751 752 /* kernel/sched/core.c */ 753 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 754 unsigned int len, 755 compat_ulong_t __user *user_mask_ptr); 756 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 757 unsigned int len, 758 compat_ulong_t __user *user_mask_ptr); 759 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, 760 struct compat_timespec __user *interval); 761 762 /* kernel/signal.c */ 763 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 764 compat_stack_t __user *uoss_ptr); 765 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 766 compat_size_t sigsetsize); 767 #ifndef CONFIG_ODD_RT_SIGACTION 768 asmlinkage long compat_sys_rt_sigaction(int, 769 const struct compat_sigaction __user *, 770 struct compat_sigaction __user *, 771 compat_size_t); 772 #endif 773 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 774 compat_sigset_t __user *oset, 775 compat_size_t sigsetsize); 776 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 777 compat_size_t sigsetsize); 778 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese, 779 struct compat_siginfo __user *uinfo, 780 struct compat_timespec __user *uts, compat_size_t sigsetsize); 781 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 782 struct compat_siginfo __user *uinfo); 783 /* No generic prototype for rt_sigreturn */ 784 785 /* kernel/sys.c */ 786 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 787 asmlinkage long compat_sys_getrlimit(unsigned int resource, 788 struct compat_rlimit __user *rlim); 789 asmlinkage long compat_sys_setrlimit(unsigned int resource, 790 struct compat_rlimit __user *rlim); 791 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 792 793 /* kernel/time.c */ 794 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, 795 struct timezone __user *tz); 796 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, 797 struct timezone __user *tz); 798 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp); 799 800 /* kernel/timer.c */ 801 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 802 803 /* ipc/mqueue.c */ 804 asmlinkage long compat_sys_mq_open(const char __user *u_name, 805 int oflag, compat_mode_t mode, 806 struct compat_mq_attr __user *u_attr); 807 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes, 808 const char __user *u_msg_ptr, 809 compat_size_t msg_len, unsigned int msg_prio, 810 const struct compat_timespec __user *u_abs_timeout); 811 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes, 812 char __user *u_msg_ptr, 813 compat_size_t msg_len, unsigned int __user *u_msg_prio, 814 const struct compat_timespec __user *u_abs_timeout); 815 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 816 const struct compat_sigevent __user *u_notification); 817 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 818 const struct compat_mq_attr __user *u_mqstat, 819 struct compat_mq_attr __user *u_omqstat); 820 821 /* ipc/msg.c */ 822 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 823 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 824 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 825 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 826 compat_ssize_t msgsz, int msgflg); 827 828 /* ipc/sem.c */ 829 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 830 asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, 831 unsigned nsems, const struct compat_timespec __user *timeout); 832 833 /* ipc/shm.c */ 834 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 835 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 836 837 /* net/socket.c */ 838 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 839 unsigned flags, struct sockaddr __user *addr, 840 int __user *addrlen); 841 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 842 char __user *optval, unsigned int optlen); 843 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 844 char __user *optval, int __user *optlen); 845 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 846 unsigned flags); 847 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 848 unsigned int flags); 849 850 /* mm/filemap.c: No generic prototype for readahead */ 851 852 /* security/keys/keyctl.c */ 853 asmlinkage long compat_sys_keyctl(u32 option, 854 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 855 856 /* arch/example/kernel/sys_example.c */ 857 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 858 const compat_uptr_t __user *envp); 859 860 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 861 862 /* mm/, CONFIG_MMU only */ 863 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 864 compat_ulong_t mode, 865 compat_ulong_t __user *nmask, 866 compat_ulong_t maxnode, compat_ulong_t flags); 867 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 868 compat_ulong_t __user *nmask, 869 compat_ulong_t maxnode, 870 compat_ulong_t addr, 871 compat_ulong_t flags); 872 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 873 compat_ulong_t maxnode); 874 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 875 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 876 const compat_ulong_t __user *new_nodes); 877 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 878 __u32 __user *pages, 879 const int __user *nodes, 880 int __user *status, 881 int flags); 882 883 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 884 compat_pid_t pid, int sig, 885 struct compat_siginfo __user *uinfo); 886 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, 887 unsigned vlen, unsigned int flags, 888 struct compat_timespec __user *timeout); 889 asmlinkage long compat_sys_wait4(compat_pid_t pid, 890 compat_uint_t __user *stat_addr, int options, 891 struct compat_rusage __user *ru); 892 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 893 int, const char __user *); 894 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 895 struct file_handle __user *handle, 896 int flags); 897 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock, 898 struct compat_timex __user *tp); 899 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 900 unsigned vlen, unsigned int flags); 901 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid, 902 const struct compat_iovec __user *lvec, 903 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 904 compat_ulong_t riovcnt, compat_ulong_t flags); 905 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid, 906 const struct compat_iovec __user *lvec, 907 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 908 compat_ulong_t riovcnt, compat_ulong_t flags); 909 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 910 const compat_uptr_t __user *argv, 911 const compat_uptr_t __user *envp, int flags); 912 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 913 const struct compat_iovec __user *vec, 914 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 915 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 916 const struct compat_iovec __user *vec, 917 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 918 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 919 asmlinkage long compat_sys_readv64v2(unsigned long fd, 920 const struct compat_iovec __user *vec, 921 unsigned long vlen, loff_t pos, rwf_t flags); 922 #endif 923 924 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 925 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 926 const struct compat_iovec __user *vec, 927 unsigned long vlen, loff_t pos, rwf_t flags); 928 #endif 929 930 931 /* 932 * Deprecated system calls which are still defined in 933 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 934 */ 935 936 /* __ARCH_WANT_SYSCALL_NO_AT */ 937 asmlinkage long compat_sys_open(const char __user *filename, int flags, 938 umode_t mode); 939 asmlinkage long compat_sys_utimes(const char __user *filename, 940 struct compat_timeval __user *t); 941 942 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 943 asmlinkage long compat_sys_signalfd(int ufd, 944 const compat_sigset_t __user *sigmask, 945 compat_size_t sigsetsize); 946 947 /* __ARCH_WANT_SYSCALL_OFF_T */ 948 asmlinkage long compat_sys_newstat(const char __user *filename, 949 struct compat_stat __user *statbuf); 950 asmlinkage long compat_sys_newlstat(const char __user *filename, 951 struct compat_stat __user *statbuf); 952 953 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 954 asmlinkage long compat_sys_time(compat_time_t __user *tloc); 955 asmlinkage long compat_sys_utime(const char __user *filename, 956 struct compat_utimbuf __user *t); 957 asmlinkage long compat_sys_futimesat(unsigned int dfd, 958 const char __user *filename, 959 struct compat_timeval __user *t); 960 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 961 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 962 struct compat_timeval __user *tvp); 963 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 964 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 965 unsigned flags); 966 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args); 967 968 /* obsolete: fs/readdir.c */ 969 asmlinkage long compat_sys_old_readdir(unsigned int fd, 970 struct compat_old_linux_dirent __user *, 971 unsigned int count); 972 973 /* obsolete: fs/select.c */ 974 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 975 976 /* obsolete: ipc */ 977 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 978 979 /* obsolete: kernel/signal.c */ 980 #ifdef __ARCH_WANT_SYS_SIGPENDING 981 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 982 #endif 983 984 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 985 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 986 compat_old_sigset_t __user *oset); 987 #endif 988 #ifdef CONFIG_COMPAT_OLD_SIGACTION 989 asmlinkage long compat_sys_sigaction(int sig, 990 const struct compat_old_sigaction __user *act, 991 struct compat_old_sigaction __user *oact); 992 #endif 993 994 /* obsolete: kernel/time/time.c */ 995 asmlinkage long compat_sys_stime(compat_time_t __user *tptr); 996 997 /* obsolete: net/socket.c */ 998 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 999 1000 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 1001 1002 1003 /* 1004 * For most but not all architectures, "am I in a compat syscall?" and 1005 * "am I a compat task?" are the same question. For architectures on which 1006 * they aren't the same question, arch code can override in_compat_syscall. 1007 */ 1008 1009 #ifndef in_compat_syscall 1010 static inline bool in_compat_syscall(void) { return is_compat_task(); } 1011 #endif 1012 1013 /** 1014 * ns_to_compat_timeval - Compat version of ns_to_timeval 1015 * @nsec: the nanoseconds value to be converted 1016 * 1017 * Returns the compat_timeval representation of the nsec parameter. 1018 */ 1019 static inline struct compat_timeval ns_to_compat_timeval(s64 nsec) 1020 { 1021 struct timeval tv; 1022 struct compat_timeval ctv; 1023 1024 tv = ns_to_timeval(nsec); 1025 ctv.tv_sec = tv.tv_sec; 1026 ctv.tv_usec = tv.tv_usec; 1027 1028 return ctv; 1029 } 1030 1031 #else /* !CONFIG_COMPAT */ 1032 1033 #define is_compat_task() (0) 1034 #ifndef in_compat_syscall 1035 static inline bool in_compat_syscall(void) { return false; } 1036 #endif 1037 1038 #endif /* CONFIG_COMPAT */ 1039 1040 #endif /* _LINUX_COMPAT_H */ 1041