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 11 #ifdef CONFIG_COMPAT 12 13 #include <linux/stat.h> 14 #include <linux/param.h> /* for HZ */ 15 #include <linux/sem.h> 16 #include <linux/socket.h> 17 #include <linux/if.h> 18 #include <linux/fs.h> 19 #include <linux/aio_abi.h> /* for aio_context_t */ 20 #include <linux/uaccess.h> 21 #include <linux/unistd.h> 22 23 #include <asm/compat.h> 24 #include <asm/siginfo.h> 25 #include <asm/signal.h> 26 27 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 28 /* 29 * It may be useful for an architecture to override the definitions of the 30 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular 31 * to use a different calling convention for syscalls. To allow for that, 32 + the prototypes for the compat_sys_*() functions below will *not* be included 33 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 34 */ 35 #include <asm/syscall_wrapper.h> 36 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 37 38 #ifndef COMPAT_USE_64BIT_TIME 39 #define COMPAT_USE_64BIT_TIME 0 40 #endif 41 42 #ifndef __SC_DELOUSE 43 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v)) 44 #endif 45 46 #ifndef COMPAT_SYSCALL_DEFINE0 47 #define COMPAT_SYSCALL_DEFINE0(name) \ 48 asmlinkage long compat_sys_##name(void); \ 49 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \ 50 asmlinkage long compat_sys_##name(void) 51 #endif /* COMPAT_SYSCALL_DEFINE0 */ 52 53 #define COMPAT_SYSCALL_DEFINE1(name, ...) \ 54 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) 55 #define COMPAT_SYSCALL_DEFINE2(name, ...) \ 56 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__) 57 #define COMPAT_SYSCALL_DEFINE3(name, ...) \ 58 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) 59 #define COMPAT_SYSCALL_DEFINE4(name, ...) \ 60 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__) 61 #define COMPAT_SYSCALL_DEFINE5(name, ...) \ 62 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__) 63 #define COMPAT_SYSCALL_DEFINE6(name, ...) \ 64 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__) 65 66 /* 67 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which 68 * sign-extends 32-bit ints to longs whenever needed. The actual work is 69 * done within __do_compat_sys_*(). 70 */ 71 #ifndef COMPAT_SYSCALL_DEFINEx 72 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ 73 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \ 74 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \ 75 __attribute__((alias(__stringify(__se_compat_sys##name)))); \ 76 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \ 77 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\ 78 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ 79 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 80 { \ 81 return __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\ 82 } \ 83 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) 84 #endif /* COMPAT_SYSCALL_DEFINEx */ 85 86 #ifndef compat_user_stack_pointer 87 #define compat_user_stack_pointer() current_user_stack_pointer() 88 #endif 89 #ifndef compat_sigaltstack /* we'll need that for MIPS */ 90 typedef struct compat_sigaltstack { 91 compat_uptr_t ss_sp; 92 int ss_flags; 93 compat_size_t ss_size; 94 } compat_stack_t; 95 #endif 96 97 #define compat_jiffies_to_clock_t(x) \ 98 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) 99 100 typedef __compat_uid32_t compat_uid_t; 101 typedef __compat_gid32_t compat_gid_t; 102 103 typedef compat_ulong_t compat_aio_context_t; 104 105 struct compat_sel_arg_struct; 106 struct rusage; 107 108 struct compat_itimerspec { 109 struct compat_timespec it_interval; 110 struct compat_timespec it_value; 111 }; 112 113 struct compat_utimbuf { 114 compat_time_t actime; 115 compat_time_t modtime; 116 }; 117 118 struct compat_itimerval { 119 struct compat_timeval it_interval; 120 struct compat_timeval it_value; 121 }; 122 123 struct itimerval; 124 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *); 125 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *); 126 127 struct compat_tms { 128 compat_clock_t tms_utime; 129 compat_clock_t tms_stime; 130 compat_clock_t tms_cutime; 131 compat_clock_t tms_cstime; 132 }; 133 134 struct compat_timex { 135 compat_uint_t modes; 136 compat_long_t offset; 137 compat_long_t freq; 138 compat_long_t maxerror; 139 compat_long_t esterror; 140 compat_int_t status; 141 compat_long_t constant; 142 compat_long_t precision; 143 compat_long_t tolerance; 144 struct compat_timeval time; 145 compat_long_t tick; 146 compat_long_t ppsfreq; 147 compat_long_t jitter; 148 compat_int_t shift; 149 compat_long_t stabil; 150 compat_long_t jitcnt; 151 compat_long_t calcnt; 152 compat_long_t errcnt; 153 compat_long_t stbcnt; 154 compat_int_t tai; 155 156 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32; 157 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32; 158 compat_int_t:32; compat_int_t:32; compat_int_t:32; 159 }; 160 161 struct timex; 162 int compat_get_timex(struct timex *, const struct compat_timex __user *); 163 int compat_put_timex(struct compat_timex __user *, const struct timex *); 164 165 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) 166 167 typedef struct { 168 compat_sigset_word sig[_COMPAT_NSIG_WORDS]; 169 } compat_sigset_t; 170 171 struct compat_sigaction { 172 #ifndef __ARCH_HAS_IRIX_SIGACTION 173 compat_uptr_t sa_handler; 174 compat_ulong_t sa_flags; 175 #else 176 compat_uint_t sa_flags; 177 compat_uptr_t sa_handler; 178 #endif 179 #ifdef __ARCH_HAS_SA_RESTORER 180 compat_uptr_t sa_restorer; 181 #endif 182 compat_sigset_t sa_mask __packed; 183 }; 184 185 typedef union compat_sigval { 186 compat_int_t sival_int; 187 compat_uptr_t sival_ptr; 188 } compat_sigval_t; 189 190 typedef struct compat_siginfo { 191 int si_signo; 192 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 193 int si_errno; 194 int si_code; 195 #else 196 int si_code; 197 int si_errno; 198 #endif 199 200 union { 201 int _pad[128/sizeof(int) - 3]; 202 203 /* kill() */ 204 struct { 205 compat_pid_t _pid; /* sender's pid */ 206 __compat_uid32_t _uid; /* sender's uid */ 207 } _kill; 208 209 /* POSIX.1b timers */ 210 struct { 211 compat_timer_t _tid; /* timer id */ 212 int _overrun; /* overrun count */ 213 compat_sigval_t _sigval; /* same as below */ 214 } _timer; 215 216 /* POSIX.1b signals */ 217 struct { 218 compat_pid_t _pid; /* sender's pid */ 219 __compat_uid32_t _uid; /* sender's uid */ 220 compat_sigval_t _sigval; 221 } _rt; 222 223 /* SIGCHLD */ 224 struct { 225 compat_pid_t _pid; /* which child */ 226 __compat_uid32_t _uid; /* sender's uid */ 227 int _status; /* exit code */ 228 compat_clock_t _utime; 229 compat_clock_t _stime; 230 } _sigchld; 231 232 #ifdef CONFIG_X86_X32_ABI 233 /* SIGCHLD (x32 version) */ 234 struct { 235 compat_pid_t _pid; /* which child */ 236 __compat_uid32_t _uid; /* sender's uid */ 237 int _status; /* exit code */ 238 compat_s64 _utime; 239 compat_s64 _stime; 240 } _sigchld_x32; 241 #endif 242 243 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */ 244 struct { 245 compat_uptr_t _addr; /* faulting insn/memory ref. */ 246 #ifdef __ARCH_SI_TRAPNO 247 int _trapno; /* TRAP # which caused the signal */ 248 #endif 249 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ 250 sizeof(short) : __alignof__(compat_uptr_t)) 251 union { 252 /* 253 * used when si_code=BUS_MCEERR_AR or 254 * used when si_code=BUS_MCEERR_AO 255 */ 256 short int _addr_lsb; /* Valid LSB of the reported address. */ 257 /* used when si_code=SEGV_BNDERR */ 258 struct { 259 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD]; 260 compat_uptr_t _lower; 261 compat_uptr_t _upper; 262 } _addr_bnd; 263 /* used when si_code=SEGV_PKUERR */ 264 struct { 265 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD]; 266 u32 _pkey; 267 } _addr_pkey; 268 }; 269 } _sigfault; 270 271 /* SIGPOLL */ 272 struct { 273 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 274 int _fd; 275 } _sigpoll; 276 277 struct { 278 compat_uptr_t _call_addr; /* calling user insn */ 279 int _syscall; /* triggering system call number */ 280 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 281 } _sigsys; 282 } _sifields; 283 } compat_siginfo_t; 284 285 /* 286 * These functions operate on 32- or 64-bit specs depending on 287 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments. 288 */ 289 extern int compat_get_timespec(struct timespec *, const void __user *); 290 extern int compat_put_timespec(const struct timespec *, void __user *); 291 extern int compat_get_timeval(struct timeval *, const void __user *); 292 extern int compat_put_timeval(const struct timeval *, void __user *); 293 extern int compat_get_timespec64(struct timespec64 *, const void __user *); 294 extern int compat_put_timespec64(const struct timespec64 *, void __user *); 295 extern int get_compat_itimerspec64(struct itimerspec64 *its, 296 const struct compat_itimerspec __user *uits); 297 extern int put_compat_itimerspec64(const struct itimerspec64 *its, 298 struct compat_itimerspec __user *uits); 299 300 struct compat_iovec { 301 compat_uptr_t iov_base; 302 compat_size_t iov_len; 303 }; 304 305 struct compat_rlimit { 306 compat_ulong_t rlim_cur; 307 compat_ulong_t rlim_max; 308 }; 309 310 struct compat_rusage { 311 struct compat_timeval ru_utime; 312 struct compat_timeval ru_stime; 313 compat_long_t ru_maxrss; 314 compat_long_t ru_ixrss; 315 compat_long_t ru_idrss; 316 compat_long_t ru_isrss; 317 compat_long_t ru_minflt; 318 compat_long_t ru_majflt; 319 compat_long_t ru_nswap; 320 compat_long_t ru_inblock; 321 compat_long_t ru_oublock; 322 compat_long_t ru_msgsnd; 323 compat_long_t ru_msgrcv; 324 compat_long_t ru_nsignals; 325 compat_long_t ru_nvcsw; 326 compat_long_t ru_nivcsw; 327 }; 328 329 extern int put_compat_rusage(const struct rusage *, 330 struct compat_rusage __user *); 331 332 struct compat_siginfo; 333 334 struct compat_dirent { 335 u32 d_ino; 336 compat_off_t d_off; 337 u16 d_reclen; 338 char d_name[256]; 339 }; 340 341 struct compat_ustat { 342 compat_daddr_t f_tfree; 343 compat_ino_t f_tinode; 344 char f_fname[6]; 345 char f_fpack[6]; 346 }; 347 348 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 349 350 typedef struct compat_sigevent { 351 compat_sigval_t sigev_value; 352 compat_int_t sigev_signo; 353 compat_int_t sigev_notify; 354 union { 355 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 356 compat_int_t _tid; 357 358 struct { 359 compat_uptr_t _function; 360 compat_uptr_t _attribute; 361 } _sigev_thread; 362 } _sigev_un; 363 } compat_sigevent_t; 364 365 struct compat_ifmap { 366 compat_ulong_t mem_start; 367 compat_ulong_t mem_end; 368 unsigned short base_addr; 369 unsigned char irq; 370 unsigned char dma; 371 unsigned char port; 372 }; 373 374 struct compat_if_settings { 375 unsigned int type; /* Type of physical device or protocol */ 376 unsigned int size; /* Size of the data allocated by the caller */ 377 compat_uptr_t ifs_ifsu; /* union of pointers */ 378 }; 379 380 struct compat_ifreq { 381 union { 382 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 383 } ifr_ifrn; 384 union { 385 struct sockaddr ifru_addr; 386 struct sockaddr ifru_dstaddr; 387 struct sockaddr ifru_broadaddr; 388 struct sockaddr ifru_netmask; 389 struct sockaddr ifru_hwaddr; 390 short ifru_flags; 391 compat_int_t ifru_ivalue; 392 compat_int_t ifru_mtu; 393 struct compat_ifmap ifru_map; 394 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 395 char ifru_newname[IFNAMSIZ]; 396 compat_caddr_t ifru_data; 397 struct compat_if_settings ifru_settings; 398 } ifr_ifru; 399 }; 400 401 struct compat_ifconf { 402 compat_int_t ifc_len; /* size of buffer */ 403 compat_caddr_t ifcbuf; 404 }; 405 406 struct compat_robust_list { 407 compat_uptr_t next; 408 }; 409 410 struct compat_robust_list_head { 411 struct compat_robust_list list; 412 compat_long_t futex_offset; 413 compat_uptr_t list_op_pending; 414 }; 415 416 #ifdef CONFIG_COMPAT_OLD_SIGACTION 417 struct compat_old_sigaction { 418 compat_uptr_t sa_handler; 419 compat_old_sigset_t sa_mask; 420 compat_ulong_t sa_flags; 421 compat_uptr_t sa_restorer; 422 }; 423 #endif 424 425 struct compat_keyctl_kdf_params { 426 compat_uptr_t hashname; 427 compat_uptr_t otherinfo; 428 __u32 otherinfolen; 429 __u32 __spare[8]; 430 }; 431 432 struct compat_statfs; 433 struct compat_statfs64; 434 struct compat_old_linux_dirent; 435 struct compat_linux_dirent; 436 struct linux_dirent64; 437 struct compat_msghdr; 438 struct compat_mmsghdr; 439 struct compat_sysinfo; 440 struct compat_sysctl_args; 441 struct compat_kexec_segment; 442 struct compat_mq_attr; 443 struct compat_msgbuf; 444 445 extern void compat_exit_robust_list(struct task_struct *curr); 446 447 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 448 449 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 450 451 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 452 unsigned long bitmap_size); 453 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 454 unsigned long bitmap_size); 455 int copy_siginfo_from_user32(siginfo_t *to, const struct compat_siginfo __user *from); 456 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from); 457 int get_compat_sigevent(struct sigevent *event, 458 const struct compat_sigevent __user *u_event); 459 460 static inline int compat_timeval_compare(struct compat_timeval *lhs, 461 struct compat_timeval *rhs) 462 { 463 if (lhs->tv_sec < rhs->tv_sec) 464 return -1; 465 if (lhs->tv_sec > rhs->tv_sec) 466 return 1; 467 return lhs->tv_usec - rhs->tv_usec; 468 } 469 470 static inline int compat_timespec_compare(struct compat_timespec *lhs, 471 struct compat_timespec *rhs) 472 { 473 if (lhs->tv_sec < rhs->tv_sec) 474 return -1; 475 if (lhs->tv_sec > rhs->tv_sec) 476 return 1; 477 return lhs->tv_nsec - rhs->tv_nsec; 478 } 479 480 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 481 482 /* 483 * Defined inline such that size can be compile time constant, which avoids 484 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 485 */ 486 static inline int 487 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 488 unsigned int size) 489 { 490 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 491 #ifdef __BIG_ENDIAN 492 compat_sigset_t v; 493 switch (_NSIG_WORDS) { 494 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 495 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 496 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 497 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 498 } 499 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 500 #else 501 return copy_to_user(compat, set, size) ? -EFAULT : 0; 502 #endif 503 } 504 505 extern int compat_ptrace_request(struct task_struct *child, 506 compat_long_t request, 507 compat_ulong_t addr, compat_ulong_t data); 508 509 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 510 compat_ulong_t addr, compat_ulong_t data); 511 512 struct epoll_event; /* fortunately, this one is fixed-layout */ 513 514 extern ssize_t compat_rw_copy_check_uvector(int type, 515 const struct compat_iovec __user *uvector, 516 unsigned long nr_segs, 517 unsigned long fast_segs, struct iovec *fast_pointer, 518 struct iovec **ret_pointer); 519 520 extern void __user *compat_alloc_user_space(unsigned long len); 521 522 int compat_restore_altstack(const compat_stack_t __user *uss); 523 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 524 #define compat_save_altstack_ex(uss, sp) do { \ 525 compat_stack_t __user *__uss = uss; \ 526 struct task_struct *t = current; \ 527 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \ 528 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \ 529 put_user_ex(t->sas_ss_size, &__uss->ss_size); \ 530 if (t->sas_ss_flags & SS_AUTODISARM) \ 531 sas_ss_reset(t); \ 532 } while (0); 533 534 /* 535 * These syscall function prototypes are kept in the same order as 536 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 537 * go below. 538 * 539 * Please note that these prototypes here are only provided for information 540 * purposes, for static analysis, and for linking from the syscall table. 541 * These functions should not be called elsewhere from kernel code. 542 * 543 * As the syscall calling convention may be different from the default 544 * for architectures overriding the syscall calling convention, do not 545 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 546 */ 547 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 548 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 549 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 550 u32 __user *iocb); 551 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id, 552 compat_long_t min_nr, 553 compat_long_t nr, 554 struct io_event __user *events, 555 struct compat_timespec __user *timeout); 556 557 /* fs/cookies.c */ 558 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 559 560 /* fs/eventpoll.c */ 561 asmlinkage long compat_sys_epoll_pwait(int epfd, 562 struct epoll_event __user *events, 563 int maxevents, int timeout, 564 const compat_sigset_t __user *sigmask, 565 compat_size_t sigsetsize); 566 567 /* fs/fcntl.c */ 568 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 569 compat_ulong_t arg); 570 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 571 compat_ulong_t arg); 572 573 /* fs/ioctl.c */ 574 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 575 compat_ulong_t arg); 576 577 /* fs/namespace.c */ 578 asmlinkage long compat_sys_mount(const char __user *dev_name, 579 const char __user *dir_name, 580 const char __user *type, compat_ulong_t flags, 581 const void __user *data); 582 583 /* fs/open.c */ 584 asmlinkage long compat_sys_statfs(const char __user *pathname, 585 struct compat_statfs __user *buf); 586 asmlinkage long compat_sys_statfs64(const char __user *pathname, 587 compat_size_t sz, 588 struct compat_statfs64 __user *buf); 589 asmlinkage long compat_sys_fstatfs(unsigned int fd, 590 struct compat_statfs __user *buf); 591 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 592 struct compat_statfs64 __user *buf); 593 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 594 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 595 /* No generic prototype for truncate64, ftruncate64, fallocate */ 596 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 597 int flags, umode_t mode); 598 599 /* fs/readdir.c */ 600 asmlinkage long compat_sys_getdents(unsigned int fd, 601 struct compat_linux_dirent __user *dirent, 602 unsigned int count); 603 604 /* fs/read_write.c */ 605 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 606 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd, 607 const struct compat_iovec __user *vec, compat_ulong_t vlen); 608 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd, 609 const struct compat_iovec __user *vec, compat_ulong_t vlen); 610 /* No generic prototype for pread64 and pwrite64 */ 611 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 612 const struct compat_iovec __user *vec, 613 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 614 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 615 const struct compat_iovec __user *vec, 616 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 617 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 618 asmlinkage long compat_sys_preadv64(unsigned long fd, 619 const struct compat_iovec __user *vec, 620 unsigned long vlen, loff_t pos); 621 #endif 622 623 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 624 asmlinkage long compat_sys_pwritev64(unsigned long fd, 625 const struct compat_iovec __user *vec, 626 unsigned long vlen, loff_t pos); 627 #endif 628 629 /* fs/sendfile.c */ 630 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 631 compat_off_t __user *offset, compat_size_t count); 632 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 633 compat_loff_t __user *offset, compat_size_t count); 634 635 /* fs/select.c */ 636 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, 637 compat_ulong_t __user *outp, 638 compat_ulong_t __user *exp, 639 struct compat_timespec __user *tsp, 640 void __user *sig); 641 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, 642 unsigned int nfds, 643 struct compat_timespec __user *tsp, 644 const compat_sigset_t __user *sigmask, 645 compat_size_t sigsetsize); 646 647 /* fs/signalfd.c */ 648 asmlinkage long compat_sys_signalfd4(int ufd, 649 const compat_sigset_t __user *sigmask, 650 compat_size_t sigsetsize, int flags); 651 652 /* fs/splice.c */ 653 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *, 654 unsigned int nr_segs, unsigned int flags); 655 656 /* fs/stat.c */ 657 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 658 const char __user *filename, 659 struct compat_stat __user *statbuf, 660 int flag); 661 asmlinkage long compat_sys_newfstat(unsigned int fd, 662 struct compat_stat __user *statbuf); 663 664 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 665 666 /* fs/timerfd.c */ 667 asmlinkage long compat_sys_timerfd_gettime(int ufd, 668 struct compat_itimerspec __user *otmr); 669 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, 670 const struct compat_itimerspec __user *utmr, 671 struct compat_itimerspec __user *otmr); 672 673 /* fs/utimes.c */ 674 asmlinkage long compat_sys_utimensat(unsigned int dfd, 675 const char __user *filename, 676 struct compat_timespec __user *t, 677 int flags); 678 679 /* kernel/exit.c */ 680 asmlinkage long compat_sys_waitid(int, compat_pid_t, 681 struct compat_siginfo __user *, int, 682 struct compat_rusage __user *); 683 684 685 686 /* kernel/futex.c */ 687 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val, 688 struct compat_timespec __user *utime, u32 __user *uaddr2, 689 u32 val3); 690 asmlinkage long 691 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 692 compat_size_t len); 693 asmlinkage long 694 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 695 compat_size_t __user *len_ptr); 696 697 /* kernel/hrtimer.c */ 698 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp, 699 struct compat_timespec __user *rmtp); 700 701 /* kernel/itimer.c */ 702 asmlinkage long compat_sys_getitimer(int which, 703 struct compat_itimerval __user *it); 704 asmlinkage long compat_sys_setitimer(int which, 705 struct compat_itimerval __user *in, 706 struct compat_itimerval __user *out); 707 708 /* kernel/kexec.c */ 709 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 710 compat_ulong_t nr_segments, 711 struct compat_kexec_segment __user *, 712 compat_ulong_t flags); 713 714 /* kernel/posix-timers.c */ 715 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 716 struct compat_sigevent __user *timer_event_spec, 717 timer_t __user *created_timer_id); 718 asmlinkage long compat_sys_timer_gettime(timer_t timer_id, 719 struct compat_itimerspec __user *setting); 720 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags, 721 struct compat_itimerspec __user *new, 722 struct compat_itimerspec __user *old); 723 asmlinkage long compat_sys_clock_settime(clockid_t which_clock, 724 struct compat_timespec __user *tp); 725 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock, 726 struct compat_timespec __user *tp); 727 asmlinkage long compat_sys_clock_getres(clockid_t which_clock, 728 struct compat_timespec __user *tp); 729 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, 730 struct compat_timespec __user *rqtp, 731 struct compat_timespec __user *rmtp); 732 733 /* kernel/ptrace.c */ 734 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 735 compat_long_t addr, compat_long_t data); 736 737 /* kernel/sched/core.c */ 738 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 739 unsigned int len, 740 compat_ulong_t __user *user_mask_ptr); 741 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 742 unsigned int len, 743 compat_ulong_t __user *user_mask_ptr); 744 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, 745 struct compat_timespec __user *interval); 746 747 /* kernel/signal.c */ 748 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 749 compat_stack_t __user *uoss_ptr); 750 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 751 compat_size_t sigsetsize); 752 #ifndef CONFIG_ODD_RT_SIGACTION 753 asmlinkage long compat_sys_rt_sigaction(int, 754 const struct compat_sigaction __user *, 755 struct compat_sigaction __user *, 756 compat_size_t); 757 #endif 758 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 759 compat_sigset_t __user *oset, 760 compat_size_t sigsetsize); 761 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 762 compat_size_t sigsetsize); 763 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese, 764 struct compat_siginfo __user *uinfo, 765 struct compat_timespec __user *uts, compat_size_t sigsetsize); 766 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 767 struct compat_siginfo __user *uinfo); 768 /* No generic prototype for rt_sigreturn */ 769 770 /* kernel/sys.c */ 771 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 772 asmlinkage long compat_sys_getrlimit(unsigned int resource, 773 struct compat_rlimit __user *rlim); 774 asmlinkage long compat_sys_setrlimit(unsigned int resource, 775 struct compat_rlimit __user *rlim); 776 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 777 778 /* kernel/time.c */ 779 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, 780 struct timezone __user *tz); 781 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, 782 struct timezone __user *tz); 783 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp); 784 785 /* kernel/timer.c */ 786 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 787 788 /* ipc/mqueue.c */ 789 asmlinkage long compat_sys_mq_open(const char __user *u_name, 790 int oflag, compat_mode_t mode, 791 struct compat_mq_attr __user *u_attr); 792 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes, 793 const char __user *u_msg_ptr, 794 compat_size_t msg_len, unsigned int msg_prio, 795 const struct compat_timespec __user *u_abs_timeout); 796 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes, 797 char __user *u_msg_ptr, 798 compat_size_t msg_len, unsigned int __user *u_msg_prio, 799 const struct compat_timespec __user *u_abs_timeout); 800 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 801 const struct compat_sigevent __user *u_notification); 802 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 803 const struct compat_mq_attr __user *u_mqstat, 804 struct compat_mq_attr __user *u_omqstat); 805 806 /* ipc/msg.c */ 807 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 808 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 809 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 810 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 811 compat_ssize_t msgsz, int msgflg); 812 813 /* ipc/sem.c */ 814 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 815 asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, 816 unsigned nsems, const struct compat_timespec __user *timeout); 817 818 /* ipc/shm.c */ 819 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 820 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 821 822 /* net/socket.c */ 823 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 824 unsigned flags, struct sockaddr __user *addr, 825 int __user *addrlen); 826 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 827 char __user *optval, unsigned int optlen); 828 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 829 char __user *optval, int __user *optlen); 830 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 831 unsigned flags); 832 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 833 unsigned int flags); 834 835 /* mm/filemap.c: No generic prototype for readahead */ 836 837 /* security/keys/keyctl.c */ 838 asmlinkage long compat_sys_keyctl(u32 option, 839 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 840 841 /* arch/example/kernel/sys_example.c */ 842 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 843 const compat_uptr_t __user *envp); 844 845 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 846 847 /* mm/, CONFIG_MMU only */ 848 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 849 compat_ulong_t mode, 850 compat_ulong_t __user *nmask, 851 compat_ulong_t maxnode, compat_ulong_t flags); 852 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 853 compat_ulong_t __user *nmask, 854 compat_ulong_t maxnode, 855 compat_ulong_t addr, 856 compat_ulong_t flags); 857 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 858 compat_ulong_t maxnode); 859 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 860 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 861 const compat_ulong_t __user *new_nodes); 862 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 863 __u32 __user *pages, 864 const int __user *nodes, 865 int __user *status, 866 int flags); 867 868 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 869 compat_pid_t pid, int sig, 870 struct compat_siginfo __user *uinfo); 871 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, 872 unsigned vlen, unsigned int flags, 873 struct compat_timespec __user *timeout); 874 asmlinkage long compat_sys_wait4(compat_pid_t pid, 875 compat_uint_t __user *stat_addr, int options, 876 struct compat_rusage __user *ru); 877 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 878 int, const char __user *); 879 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 880 struct file_handle __user *handle, 881 int flags); 882 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock, 883 struct compat_timex __user *tp); 884 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 885 unsigned vlen, unsigned int flags); 886 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid, 887 const struct compat_iovec __user *lvec, 888 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 889 compat_ulong_t riovcnt, compat_ulong_t flags); 890 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid, 891 const struct compat_iovec __user *lvec, 892 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 893 compat_ulong_t riovcnt, compat_ulong_t flags); 894 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 895 const compat_uptr_t __user *argv, 896 const compat_uptr_t __user *envp, int flags); 897 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 898 const struct compat_iovec __user *vec, 899 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 900 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 901 const struct compat_iovec __user *vec, 902 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 903 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 904 asmlinkage long compat_sys_readv64v2(unsigned long fd, 905 const struct compat_iovec __user *vec, 906 unsigned long vlen, loff_t pos, rwf_t flags); 907 #endif 908 909 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 910 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 911 const struct compat_iovec __user *vec, 912 unsigned long vlen, loff_t pos, rwf_t flags); 913 #endif 914 915 916 /* 917 * Deprecated system calls which are still defined in 918 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 919 */ 920 921 /* __ARCH_WANT_SYSCALL_NO_AT */ 922 asmlinkage long compat_sys_open(const char __user *filename, int flags, 923 umode_t mode); 924 asmlinkage long compat_sys_utimes(const char __user *filename, 925 struct compat_timeval __user *t); 926 927 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 928 asmlinkage long compat_sys_signalfd(int ufd, 929 const compat_sigset_t __user *sigmask, 930 compat_size_t sigsetsize); 931 932 /* __ARCH_WANT_SYSCALL_OFF_T */ 933 asmlinkage long compat_sys_newstat(const char __user *filename, 934 struct compat_stat __user *statbuf); 935 asmlinkage long compat_sys_newlstat(const char __user *filename, 936 struct compat_stat __user *statbuf); 937 938 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 939 asmlinkage long compat_sys_time(compat_time_t __user *tloc); 940 asmlinkage long compat_sys_utime(const char __user *filename, 941 struct compat_utimbuf __user *t); 942 asmlinkage long compat_sys_futimesat(unsigned int dfd, 943 const char __user *filename, 944 struct compat_timeval __user *t); 945 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 946 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 947 struct compat_timeval __user *tvp); 948 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 949 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 950 unsigned flags); 951 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args); 952 953 /* obsolete: fs/readdir.c */ 954 asmlinkage long compat_sys_old_readdir(unsigned int fd, 955 struct compat_old_linux_dirent __user *, 956 unsigned int count); 957 958 /* obsolete: fs/select.c */ 959 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 960 961 /* obsolete: ipc */ 962 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 963 964 /* obsolete: kernel/signal.c */ 965 #ifdef __ARCH_WANT_SYS_SIGPENDING 966 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 967 #endif 968 969 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 970 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 971 compat_old_sigset_t __user *oset); 972 #endif 973 #ifdef CONFIG_COMPAT_OLD_SIGACTION 974 asmlinkage long compat_sys_sigaction(int sig, 975 const struct compat_old_sigaction __user *act, 976 struct compat_old_sigaction __user *oact); 977 #endif 978 979 /* obsolete: kernel/time/time.c */ 980 asmlinkage long compat_sys_stime(compat_time_t __user *tptr); 981 982 /* obsolete: net/socket.c */ 983 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 984 985 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 986 987 988 /* 989 * For most but not all architectures, "am I in a compat syscall?" and 990 * "am I a compat task?" are the same question. For architectures on which 991 * they aren't the same question, arch code can override in_compat_syscall. 992 */ 993 994 #ifndef in_compat_syscall 995 static inline bool in_compat_syscall(void) { return is_compat_task(); } 996 #endif 997 998 /** 999 * ns_to_compat_timeval - Compat version of ns_to_timeval 1000 * @nsec: the nanoseconds value to be converted 1001 * 1002 * Returns the compat_timeval representation of the nsec parameter. 1003 */ 1004 static inline struct compat_timeval ns_to_compat_timeval(s64 nsec) 1005 { 1006 struct timeval tv; 1007 struct compat_timeval ctv; 1008 1009 tv = ns_to_timeval(nsec); 1010 ctv.tv_sec = tv.tv_sec; 1011 ctv.tv_usec = tv.tv_usec; 1012 1013 return ctv; 1014 } 1015 1016 #else /* !CONFIG_COMPAT */ 1017 1018 #define is_compat_task() (0) 1019 static inline bool in_compat_syscall(void) { return false; } 1020 1021 #endif /* CONFIG_COMPAT */ 1022 1023 #endif /* _LINUX_COMPAT_H */ 1024