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/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 #ifndef COMPAT_MINSIGSTKSZ 107 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ 108 #endif 109 110 #define compat_jiffies_to_clock_t(x) \ 111 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) 112 113 typedef __compat_uid32_t compat_uid_t; 114 typedef __compat_gid32_t compat_gid_t; 115 116 struct compat_sel_arg_struct; 117 struct rusage; 118 119 struct compat_itimerval { 120 struct old_timeval32 it_interval; 121 struct old_timeval32 it_value; 122 }; 123 124 struct itimerval; 125 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *); 126 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *); 127 128 struct compat_tms { 129 compat_clock_t tms_utime; 130 compat_clock_t tms_stime; 131 compat_clock_t tms_cutime; 132 compat_clock_t tms_cstime; 133 }; 134 135 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) 136 137 typedef struct { 138 compat_sigset_word sig[_COMPAT_NSIG_WORDS]; 139 } compat_sigset_t; 140 141 int set_compat_user_sigmask(const compat_sigset_t __user *umask, 142 size_t sigsetsize); 143 144 struct compat_sigaction { 145 #ifndef __ARCH_HAS_IRIX_SIGACTION 146 compat_uptr_t sa_handler; 147 compat_ulong_t sa_flags; 148 #else 149 compat_uint_t sa_flags; 150 compat_uptr_t sa_handler; 151 #endif 152 #ifdef __ARCH_HAS_SA_RESTORER 153 compat_uptr_t sa_restorer; 154 #endif 155 compat_sigset_t sa_mask __packed; 156 }; 157 158 typedef union compat_sigval { 159 compat_int_t sival_int; 160 compat_uptr_t sival_ptr; 161 } compat_sigval_t; 162 163 typedef struct compat_siginfo { 164 int si_signo; 165 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 166 int si_errno; 167 int si_code; 168 #else 169 int si_code; 170 int si_errno; 171 #endif 172 173 union { 174 int _pad[128/sizeof(int) - 3]; 175 176 /* kill() */ 177 struct { 178 compat_pid_t _pid; /* sender's pid */ 179 __compat_uid32_t _uid; /* sender's uid */ 180 } _kill; 181 182 /* POSIX.1b timers */ 183 struct { 184 compat_timer_t _tid; /* timer id */ 185 int _overrun; /* overrun count */ 186 compat_sigval_t _sigval; /* same as below */ 187 } _timer; 188 189 /* POSIX.1b signals */ 190 struct { 191 compat_pid_t _pid; /* sender's pid */ 192 __compat_uid32_t _uid; /* sender's uid */ 193 compat_sigval_t _sigval; 194 } _rt; 195 196 /* SIGCHLD */ 197 struct { 198 compat_pid_t _pid; /* which child */ 199 __compat_uid32_t _uid; /* sender's uid */ 200 int _status; /* exit code */ 201 compat_clock_t _utime; 202 compat_clock_t _stime; 203 } _sigchld; 204 205 #ifdef CONFIG_X86_X32_ABI 206 /* SIGCHLD (x32 version) */ 207 struct { 208 compat_pid_t _pid; /* which child */ 209 __compat_uid32_t _uid; /* sender's uid */ 210 int _status; /* exit code */ 211 compat_s64 _utime; 212 compat_s64 _stime; 213 } _sigchld_x32; 214 #endif 215 216 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */ 217 struct { 218 compat_uptr_t _addr; /* faulting insn/memory ref. */ 219 #ifdef __ARCH_SI_TRAPNO 220 int _trapno; /* TRAP # which caused the signal */ 221 #endif 222 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ 223 sizeof(short) : __alignof__(compat_uptr_t)) 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 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD]; 233 compat_uptr_t _lower; 234 compat_uptr_t _upper; 235 } _addr_bnd; 236 /* used when si_code=SEGV_PKUERR */ 237 struct { 238 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD]; 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 *); 266 267 struct compat_iovec { 268 compat_uptr_t iov_base; 269 compat_size_t iov_len; 270 }; 271 272 struct compat_rlimit { 273 compat_ulong_t rlim_cur; 274 compat_ulong_t rlim_max; 275 }; 276 277 struct compat_rusage { 278 struct old_timeval32 ru_utime; 279 struct old_timeval32 ru_stime; 280 compat_long_t ru_maxrss; 281 compat_long_t ru_ixrss; 282 compat_long_t ru_idrss; 283 compat_long_t ru_isrss; 284 compat_long_t ru_minflt; 285 compat_long_t ru_majflt; 286 compat_long_t ru_nswap; 287 compat_long_t ru_inblock; 288 compat_long_t ru_oublock; 289 compat_long_t ru_msgsnd; 290 compat_long_t ru_msgrcv; 291 compat_long_t ru_nsignals; 292 compat_long_t ru_nvcsw; 293 compat_long_t ru_nivcsw; 294 }; 295 296 extern int put_compat_rusage(const struct rusage *, 297 struct compat_rusage __user *); 298 299 struct compat_siginfo; 300 struct __compat_aio_sigset; 301 302 struct compat_dirent { 303 u32 d_ino; 304 compat_off_t d_off; 305 u16 d_reclen; 306 char d_name[256]; 307 }; 308 309 struct compat_ustat { 310 compat_daddr_t f_tfree; 311 compat_ino_t f_tinode; 312 char f_fname[6]; 313 char f_fpack[6]; 314 }; 315 316 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 317 318 typedef struct compat_sigevent { 319 compat_sigval_t sigev_value; 320 compat_int_t sigev_signo; 321 compat_int_t sigev_notify; 322 union { 323 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 324 compat_int_t _tid; 325 326 struct { 327 compat_uptr_t _function; 328 compat_uptr_t _attribute; 329 } _sigev_thread; 330 } _sigev_un; 331 } compat_sigevent_t; 332 333 struct compat_ifmap { 334 compat_ulong_t mem_start; 335 compat_ulong_t mem_end; 336 unsigned short base_addr; 337 unsigned char irq; 338 unsigned char dma; 339 unsigned char port; 340 }; 341 342 struct compat_if_settings { 343 unsigned int type; /* Type of physical device or protocol */ 344 unsigned int size; /* Size of the data allocated by the caller */ 345 compat_uptr_t ifs_ifsu; /* union of pointers */ 346 }; 347 348 struct compat_ifreq { 349 union { 350 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 351 } ifr_ifrn; 352 union { 353 struct sockaddr ifru_addr; 354 struct sockaddr ifru_dstaddr; 355 struct sockaddr ifru_broadaddr; 356 struct sockaddr ifru_netmask; 357 struct sockaddr ifru_hwaddr; 358 short ifru_flags; 359 compat_int_t ifru_ivalue; 360 compat_int_t ifru_mtu; 361 struct compat_ifmap ifru_map; 362 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 363 char ifru_newname[IFNAMSIZ]; 364 compat_caddr_t ifru_data; 365 struct compat_if_settings ifru_settings; 366 } ifr_ifru; 367 }; 368 369 struct compat_ifconf { 370 compat_int_t ifc_len; /* size of buffer */ 371 compat_caddr_t ifcbuf; 372 }; 373 374 struct compat_robust_list { 375 compat_uptr_t next; 376 }; 377 378 struct compat_robust_list_head { 379 struct compat_robust_list list; 380 compat_long_t futex_offset; 381 compat_uptr_t list_op_pending; 382 }; 383 384 #ifdef CONFIG_COMPAT_OLD_SIGACTION 385 struct compat_old_sigaction { 386 compat_uptr_t sa_handler; 387 compat_old_sigset_t sa_mask; 388 compat_ulong_t sa_flags; 389 compat_uptr_t sa_restorer; 390 }; 391 #endif 392 393 struct compat_keyctl_kdf_params { 394 compat_uptr_t hashname; 395 compat_uptr_t otherinfo; 396 __u32 otherinfolen; 397 __u32 __spare[8]; 398 }; 399 400 struct compat_statfs; 401 struct compat_statfs64; 402 struct compat_old_linux_dirent; 403 struct compat_linux_dirent; 404 struct linux_dirent64; 405 struct compat_msghdr; 406 struct compat_mmsghdr; 407 struct compat_sysinfo; 408 struct compat_sysctl_args; 409 struct compat_kexec_segment; 410 struct compat_mq_attr; 411 struct compat_msgbuf; 412 413 extern void compat_exit_robust_list(struct task_struct *curr); 414 415 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 416 417 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 418 419 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 420 unsigned long bitmap_size); 421 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 422 unsigned long bitmap_size); 423 int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from); 424 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from); 425 int get_compat_sigevent(struct sigevent *event, 426 const struct compat_sigevent __user *u_event); 427 428 static inline int old_timeval32_compare(struct old_timeval32 *lhs, 429 struct old_timeval32 *rhs) 430 { 431 if (lhs->tv_sec < rhs->tv_sec) 432 return -1; 433 if (lhs->tv_sec > rhs->tv_sec) 434 return 1; 435 return lhs->tv_usec - rhs->tv_usec; 436 } 437 438 static inline int old_timespec32_compare(struct old_timespec32 *lhs, 439 struct old_timespec32 *rhs) 440 { 441 if (lhs->tv_sec < rhs->tv_sec) 442 return -1; 443 if (lhs->tv_sec > rhs->tv_sec) 444 return 1; 445 return lhs->tv_nsec - rhs->tv_nsec; 446 } 447 448 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 449 450 /* 451 * Defined inline such that size can be compile time constant, which avoids 452 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 453 */ 454 static inline int 455 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 456 unsigned int size) 457 { 458 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 459 #ifdef __BIG_ENDIAN 460 compat_sigset_t v; 461 switch (_NSIG_WORDS) { 462 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 463 /* fall through */ 464 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 465 /* fall through */ 466 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 467 /* fall through */ 468 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 469 } 470 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 471 #else 472 return copy_to_user(compat, set, size) ? -EFAULT : 0; 473 #endif 474 } 475 476 extern int compat_ptrace_request(struct task_struct *child, 477 compat_long_t request, 478 compat_ulong_t addr, compat_ulong_t data); 479 480 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 481 compat_ulong_t addr, compat_ulong_t data); 482 483 struct epoll_event; /* fortunately, this one is fixed-layout */ 484 485 extern ssize_t compat_rw_copy_check_uvector(int type, 486 const struct compat_iovec __user *uvector, 487 unsigned long nr_segs, 488 unsigned long fast_segs, struct iovec *fast_pointer, 489 struct iovec **ret_pointer); 490 491 extern void __user *compat_alloc_user_space(unsigned long len); 492 493 int compat_restore_altstack(const compat_stack_t __user *uss); 494 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 495 #define compat_save_altstack_ex(uss, sp) do { \ 496 compat_stack_t __user *__uss = uss; \ 497 struct task_struct *t = current; \ 498 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \ 499 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \ 500 put_user_ex(t->sas_ss_size, &__uss->ss_size); \ 501 if (t->sas_ss_flags & SS_AUTODISARM) \ 502 sas_ss_reset(t); \ 503 } while (0); 504 505 /* 506 * These syscall function prototypes are kept in the same order as 507 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 508 * go below. 509 * 510 * Please note that these prototypes here are only provided for information 511 * purposes, for static analysis, and for linking from the syscall table. 512 * These functions should not be called elsewhere from kernel code. 513 * 514 * As the syscall calling convention may be different from the default 515 * for architectures overriding the syscall calling convention, do not 516 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 517 */ 518 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 519 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 520 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 521 u32 __user *iocb); 522 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 523 compat_long_t min_nr, 524 compat_long_t nr, 525 struct io_event __user *events, 526 struct old_timespec32 __user *timeout, 527 const struct __compat_aio_sigset __user *usig); 528 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, 529 compat_long_t min_nr, 530 compat_long_t nr, 531 struct io_event __user *events, 532 struct __kernel_timespec __user *timeout, 533 const struct __compat_aio_sigset __user *usig); 534 535 /* fs/cookies.c */ 536 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 537 538 /* fs/eventpoll.c */ 539 asmlinkage long compat_sys_epoll_pwait(int epfd, 540 struct epoll_event __user *events, 541 int maxevents, int timeout, 542 const compat_sigset_t __user *sigmask, 543 compat_size_t sigsetsize); 544 545 /* fs/fcntl.c */ 546 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 547 compat_ulong_t arg); 548 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 549 compat_ulong_t arg); 550 551 /* fs/ioctl.c */ 552 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 553 compat_ulong_t arg); 554 555 /* fs/namespace.c */ 556 asmlinkage long compat_sys_mount(const char __user *dev_name, 557 const char __user *dir_name, 558 const char __user *type, compat_ulong_t flags, 559 const void __user *data); 560 561 /* fs/open.c */ 562 asmlinkage long compat_sys_statfs(const char __user *pathname, 563 struct compat_statfs __user *buf); 564 asmlinkage long compat_sys_statfs64(const char __user *pathname, 565 compat_size_t sz, 566 struct compat_statfs64 __user *buf); 567 asmlinkage long compat_sys_fstatfs(unsigned int fd, 568 struct compat_statfs __user *buf); 569 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 570 struct compat_statfs64 __user *buf); 571 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 572 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 573 /* No generic prototype for truncate64, ftruncate64, fallocate */ 574 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 575 int flags, umode_t mode); 576 577 /* fs/readdir.c */ 578 asmlinkage long compat_sys_getdents(unsigned int fd, 579 struct compat_linux_dirent __user *dirent, 580 unsigned int count); 581 582 /* fs/read_write.c */ 583 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 584 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd, 585 const struct compat_iovec __user *vec, compat_ulong_t vlen); 586 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd, 587 const struct compat_iovec __user *vec, compat_ulong_t vlen); 588 /* No generic prototype for pread64 and pwrite64 */ 589 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 590 const struct compat_iovec __user *vec, 591 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 592 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 593 const struct compat_iovec __user *vec, 594 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 595 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 596 asmlinkage long compat_sys_preadv64(unsigned long fd, 597 const struct compat_iovec __user *vec, 598 unsigned long vlen, loff_t pos); 599 #endif 600 601 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 602 asmlinkage long compat_sys_pwritev64(unsigned long fd, 603 const struct compat_iovec __user *vec, 604 unsigned long vlen, loff_t pos); 605 #endif 606 607 /* fs/sendfile.c */ 608 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 609 compat_off_t __user *offset, compat_size_t count); 610 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 611 compat_loff_t __user *offset, compat_size_t count); 612 613 /* fs/select.c */ 614 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, 615 compat_ulong_t __user *outp, 616 compat_ulong_t __user *exp, 617 struct old_timespec32 __user *tsp, 618 void __user *sig); 619 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, 620 compat_ulong_t __user *outp, 621 compat_ulong_t __user *exp, 622 struct __kernel_timespec __user *tsp, 623 void __user *sig); 624 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, 625 unsigned int nfds, 626 struct old_timespec32 __user *tsp, 627 const compat_sigset_t __user *sigmask, 628 compat_size_t sigsetsize); 629 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, 630 unsigned int nfds, 631 struct __kernel_timespec __user *tsp, 632 const compat_sigset_t __user *sigmask, 633 compat_size_t sigsetsize); 634 635 /* fs/signalfd.c */ 636 asmlinkage long compat_sys_signalfd4(int ufd, 637 const compat_sigset_t __user *sigmask, 638 compat_size_t sigsetsize, int flags); 639 640 /* fs/splice.c */ 641 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *, 642 unsigned int nr_segs, unsigned int flags); 643 644 /* fs/stat.c */ 645 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 646 const char __user *filename, 647 struct compat_stat __user *statbuf, 648 int flag); 649 asmlinkage long compat_sys_newfstat(unsigned int fd, 650 struct compat_stat __user *statbuf); 651 652 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 653 654 /* kernel/exit.c */ 655 asmlinkage long compat_sys_waitid(int, compat_pid_t, 656 struct compat_siginfo __user *, int, 657 struct compat_rusage __user *); 658 659 660 661 /* kernel/futex.c */ 662 asmlinkage long 663 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 664 compat_size_t len); 665 asmlinkage long 666 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 667 compat_size_t __user *len_ptr); 668 669 /* kernel/itimer.c */ 670 asmlinkage long compat_sys_getitimer(int which, 671 struct compat_itimerval __user *it); 672 asmlinkage long compat_sys_setitimer(int which, 673 struct compat_itimerval __user *in, 674 struct compat_itimerval __user *out); 675 676 /* kernel/kexec.c */ 677 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 678 compat_ulong_t nr_segments, 679 struct compat_kexec_segment __user *, 680 compat_ulong_t flags); 681 682 /* kernel/posix-timers.c */ 683 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 684 struct compat_sigevent __user *timer_event_spec, 685 timer_t __user *created_timer_id); 686 687 /* kernel/ptrace.c */ 688 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 689 compat_long_t addr, compat_long_t data); 690 691 /* kernel/sched/core.c */ 692 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 693 unsigned int len, 694 compat_ulong_t __user *user_mask_ptr); 695 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 696 unsigned int len, 697 compat_ulong_t __user *user_mask_ptr); 698 699 /* kernel/signal.c */ 700 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 701 compat_stack_t __user *uoss_ptr); 702 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 703 compat_size_t sigsetsize); 704 #ifndef CONFIG_ODD_RT_SIGACTION 705 asmlinkage long compat_sys_rt_sigaction(int, 706 const struct compat_sigaction __user *, 707 struct compat_sigaction __user *, 708 compat_size_t); 709 #endif 710 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 711 compat_sigset_t __user *oset, 712 compat_size_t sigsetsize); 713 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 714 compat_size_t sigsetsize); 715 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, 716 struct compat_siginfo __user *uinfo, 717 struct old_timespec32 __user *uts, compat_size_t sigsetsize); 718 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, 719 struct compat_siginfo __user *uinfo, 720 struct __kernel_timespec __user *uts, compat_size_t sigsetsize); 721 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 722 struct compat_siginfo __user *uinfo); 723 /* No generic prototype for rt_sigreturn */ 724 725 /* kernel/sys.c */ 726 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 727 asmlinkage long compat_sys_getrlimit(unsigned int resource, 728 struct compat_rlimit __user *rlim); 729 asmlinkage long compat_sys_setrlimit(unsigned int resource, 730 struct compat_rlimit __user *rlim); 731 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 732 733 /* kernel/time.c */ 734 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, 735 struct timezone __user *tz); 736 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, 737 struct timezone __user *tz); 738 739 /* kernel/timer.c */ 740 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 741 742 /* ipc/mqueue.c */ 743 asmlinkage long compat_sys_mq_open(const char __user *u_name, 744 int oflag, compat_mode_t mode, 745 struct compat_mq_attr __user *u_attr); 746 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 747 const struct compat_sigevent __user *u_notification); 748 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 749 const struct compat_mq_attr __user *u_mqstat, 750 struct compat_mq_attr __user *u_omqstat); 751 752 /* ipc/msg.c */ 753 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 754 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 755 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 756 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 757 compat_ssize_t msgsz, int msgflg); 758 759 /* ipc/sem.c */ 760 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 761 762 /* ipc/shm.c */ 763 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 764 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 765 766 /* net/socket.c */ 767 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 768 unsigned flags, struct sockaddr __user *addr, 769 int __user *addrlen); 770 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 771 char __user *optval, unsigned int optlen); 772 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 773 char __user *optval, int __user *optlen); 774 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 775 unsigned flags); 776 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 777 unsigned int flags); 778 779 /* mm/filemap.c: No generic prototype for readahead */ 780 781 /* security/keys/keyctl.c */ 782 asmlinkage long compat_sys_keyctl(u32 option, 783 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 784 785 /* arch/example/kernel/sys_example.c */ 786 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 787 const compat_uptr_t __user *envp); 788 789 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 790 791 /* mm/, CONFIG_MMU only */ 792 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 793 compat_ulong_t mode, 794 compat_ulong_t __user *nmask, 795 compat_ulong_t maxnode, compat_ulong_t flags); 796 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 797 compat_ulong_t __user *nmask, 798 compat_ulong_t maxnode, 799 compat_ulong_t addr, 800 compat_ulong_t flags); 801 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 802 compat_ulong_t maxnode); 803 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 804 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 805 const compat_ulong_t __user *new_nodes); 806 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 807 __u32 __user *pages, 808 const int __user *nodes, 809 int __user *status, 810 int flags); 811 812 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 813 compat_pid_t pid, int sig, 814 struct compat_siginfo __user *uinfo); 815 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, 816 unsigned vlen, unsigned int flags, 817 struct __kernel_timespec __user *timeout); 818 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, 819 unsigned vlen, unsigned int flags, 820 struct old_timespec32 __user *timeout); 821 asmlinkage long compat_sys_wait4(compat_pid_t pid, 822 compat_uint_t __user *stat_addr, int options, 823 struct compat_rusage __user *ru); 824 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 825 int, const char __user *); 826 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 827 struct file_handle __user *handle, 828 int flags); 829 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 830 unsigned vlen, unsigned int flags); 831 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid, 832 const struct compat_iovec __user *lvec, 833 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 834 compat_ulong_t riovcnt, compat_ulong_t flags); 835 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid, 836 const struct compat_iovec __user *lvec, 837 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 838 compat_ulong_t riovcnt, compat_ulong_t flags); 839 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 840 const compat_uptr_t __user *argv, 841 const compat_uptr_t __user *envp, int flags); 842 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 843 const struct compat_iovec __user *vec, 844 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 845 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 846 const struct compat_iovec __user *vec, 847 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 848 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 849 asmlinkage long compat_sys_readv64v2(unsigned long fd, 850 const struct compat_iovec __user *vec, 851 unsigned long vlen, loff_t pos, rwf_t flags); 852 #endif 853 854 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 855 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 856 const struct compat_iovec __user *vec, 857 unsigned long vlen, loff_t pos, rwf_t flags); 858 #endif 859 860 861 /* 862 * Deprecated system calls which are still defined in 863 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 864 */ 865 866 /* __ARCH_WANT_SYSCALL_NO_AT */ 867 asmlinkage long compat_sys_open(const char __user *filename, int flags, 868 umode_t mode); 869 870 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 871 asmlinkage long compat_sys_signalfd(int ufd, 872 const compat_sigset_t __user *sigmask, 873 compat_size_t sigsetsize); 874 875 /* __ARCH_WANT_SYSCALL_OFF_T */ 876 asmlinkage long compat_sys_newstat(const char __user *filename, 877 struct compat_stat __user *statbuf); 878 asmlinkage long compat_sys_newlstat(const char __user *filename, 879 struct compat_stat __user *statbuf); 880 881 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 882 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 883 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 884 struct old_timeval32 __user *tvp); 885 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 886 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 887 unsigned flags); 888 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args); 889 890 /* obsolete: fs/readdir.c */ 891 asmlinkage long compat_sys_old_readdir(unsigned int fd, 892 struct compat_old_linux_dirent __user *, 893 unsigned int count); 894 895 /* obsolete: fs/select.c */ 896 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 897 898 /* obsolete: ipc */ 899 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 900 901 /* obsolete: kernel/signal.c */ 902 #ifdef __ARCH_WANT_SYS_SIGPENDING 903 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 904 #endif 905 906 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 907 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 908 compat_old_sigset_t __user *oset); 909 #endif 910 #ifdef CONFIG_COMPAT_OLD_SIGACTION 911 asmlinkage long compat_sys_sigaction(int sig, 912 const struct compat_old_sigaction __user *act, 913 struct compat_old_sigaction __user *oact); 914 #endif 915 916 /* obsolete: net/socket.c */ 917 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 918 919 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 920 921 922 /* 923 * For most but not all architectures, "am I in a compat syscall?" and 924 * "am I a compat task?" are the same question. For architectures on which 925 * they aren't the same question, arch code can override in_compat_syscall. 926 */ 927 928 #ifndef in_compat_syscall 929 static inline bool in_compat_syscall(void) { return is_compat_task(); } 930 #endif 931 932 /** 933 * ns_to_old_timeval32 - Compat version of ns_to_timeval 934 * @nsec: the nanoseconds value to be converted 935 * 936 * Returns the old_timeval32 representation of the nsec parameter. 937 */ 938 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 939 { 940 struct timeval tv; 941 struct old_timeval32 ctv; 942 943 tv = ns_to_timeval(nsec); 944 ctv.tv_sec = tv.tv_sec; 945 ctv.tv_usec = tv.tv_usec; 946 947 return ctv; 948 } 949 950 /* 951 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) 952 * directly. Instead, use one of the functions which work equivalently, such 953 * as the kcompat_sys_xyzyyz() functions prototyped below. 954 */ 955 956 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, 957 struct compat_statfs64 __user * buf); 958 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 959 struct compat_statfs64 __user * buf); 960 961 #else /* !CONFIG_COMPAT */ 962 963 #define is_compat_task() (0) 964 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ 965 #define in_compat_syscall in_compat_syscall 966 static inline bool in_compat_syscall(void) { return false; } 967 968 #endif /* CONFIG_COMPAT */ 969 970 #endif /* _LINUX_COMPAT_H */ 971