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