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 *usigmask, 142 sigset_t *set, sigset_t *oldset, 143 size_t sigsetsize); 144 145 struct compat_sigaction { 146 #ifndef __ARCH_HAS_IRIX_SIGACTION 147 compat_uptr_t sa_handler; 148 compat_ulong_t sa_flags; 149 #else 150 compat_uint_t sa_flags; 151 compat_uptr_t sa_handler; 152 #endif 153 #ifdef __ARCH_HAS_SA_RESTORER 154 compat_uptr_t sa_restorer; 155 #endif 156 compat_sigset_t sa_mask __packed; 157 }; 158 159 typedef union compat_sigval { 160 compat_int_t sival_int; 161 compat_uptr_t sival_ptr; 162 } compat_sigval_t; 163 164 typedef struct compat_siginfo { 165 int si_signo; 166 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 167 int si_errno; 168 int si_code; 169 #else 170 int si_code; 171 int si_errno; 172 #endif 173 174 union { 175 int _pad[128/sizeof(int) - 3]; 176 177 /* kill() */ 178 struct { 179 compat_pid_t _pid; /* sender's pid */ 180 __compat_uid32_t _uid; /* sender's uid */ 181 } _kill; 182 183 /* POSIX.1b timers */ 184 struct { 185 compat_timer_t _tid; /* timer id */ 186 int _overrun; /* overrun count */ 187 compat_sigval_t _sigval; /* same as below */ 188 } _timer; 189 190 /* POSIX.1b signals */ 191 struct { 192 compat_pid_t _pid; /* sender's pid */ 193 __compat_uid32_t _uid; /* sender's uid */ 194 compat_sigval_t _sigval; 195 } _rt; 196 197 /* SIGCHLD */ 198 struct { 199 compat_pid_t _pid; /* which child */ 200 __compat_uid32_t _uid; /* sender's uid */ 201 int _status; /* exit code */ 202 compat_clock_t _utime; 203 compat_clock_t _stime; 204 } _sigchld; 205 206 #ifdef CONFIG_X86_X32_ABI 207 /* SIGCHLD (x32 version) */ 208 struct { 209 compat_pid_t _pid; /* which child */ 210 __compat_uid32_t _uid; /* sender's uid */ 211 int _status; /* exit code */ 212 compat_s64 _utime; 213 compat_s64 _stime; 214 } _sigchld_x32; 215 #endif 216 217 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */ 218 struct { 219 compat_uptr_t _addr; /* faulting insn/memory ref. */ 220 #ifdef __ARCH_SI_TRAPNO 221 int _trapno; /* TRAP # which caused the signal */ 222 #endif 223 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ 224 sizeof(short) : __alignof__(compat_uptr_t)) 225 union { 226 /* 227 * used when si_code=BUS_MCEERR_AR or 228 * used when si_code=BUS_MCEERR_AO 229 */ 230 short int _addr_lsb; /* Valid LSB of the reported address. */ 231 /* used when si_code=SEGV_BNDERR */ 232 struct { 233 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD]; 234 compat_uptr_t _lower; 235 compat_uptr_t _upper; 236 } _addr_bnd; 237 /* used when si_code=SEGV_PKUERR */ 238 struct { 239 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD]; 240 u32 _pkey; 241 } _addr_pkey; 242 }; 243 } _sigfault; 244 245 /* SIGPOLL */ 246 struct { 247 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 248 int _fd; 249 } _sigpoll; 250 251 struct { 252 compat_uptr_t _call_addr; /* calling user insn */ 253 int _syscall; /* triggering system call number */ 254 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 255 } _sigsys; 256 } _sifields; 257 } compat_siginfo_t; 258 259 /* 260 * These functions operate on 32- or 64-bit specs depending on 261 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments. 262 */ 263 extern int compat_get_timespec(struct timespec *, const void __user *); 264 extern int compat_put_timespec(const struct timespec *, void __user *); 265 extern int compat_get_timeval(struct timeval *, const void __user *); 266 extern int compat_put_timeval(const struct timeval *, void __user *); 267 268 struct compat_iovec { 269 compat_uptr_t iov_base; 270 compat_size_t iov_len; 271 }; 272 273 struct compat_rlimit { 274 compat_ulong_t rlim_cur; 275 compat_ulong_t rlim_max; 276 }; 277 278 struct compat_rusage { 279 struct old_timeval32 ru_utime; 280 struct old_timeval32 ru_stime; 281 compat_long_t ru_maxrss; 282 compat_long_t ru_ixrss; 283 compat_long_t ru_idrss; 284 compat_long_t ru_isrss; 285 compat_long_t ru_minflt; 286 compat_long_t ru_majflt; 287 compat_long_t ru_nswap; 288 compat_long_t ru_inblock; 289 compat_long_t ru_oublock; 290 compat_long_t ru_msgsnd; 291 compat_long_t ru_msgrcv; 292 compat_long_t ru_nsignals; 293 compat_long_t ru_nvcsw; 294 compat_long_t ru_nivcsw; 295 }; 296 297 extern int put_compat_rusage(const struct rusage *, 298 struct compat_rusage __user *); 299 300 struct compat_siginfo; 301 struct __compat_aio_sigset; 302 303 struct compat_dirent { 304 u32 d_ino; 305 compat_off_t d_off; 306 u16 d_reclen; 307 char d_name[256]; 308 }; 309 310 struct compat_ustat { 311 compat_daddr_t f_tfree; 312 compat_ino_t f_tinode; 313 char f_fname[6]; 314 char f_fpack[6]; 315 }; 316 317 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 318 319 typedef struct compat_sigevent { 320 compat_sigval_t sigev_value; 321 compat_int_t sigev_signo; 322 compat_int_t sigev_notify; 323 union { 324 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 325 compat_int_t _tid; 326 327 struct { 328 compat_uptr_t _function; 329 compat_uptr_t _attribute; 330 } _sigev_thread; 331 } _sigev_un; 332 } compat_sigevent_t; 333 334 struct compat_ifmap { 335 compat_ulong_t mem_start; 336 compat_ulong_t mem_end; 337 unsigned short base_addr; 338 unsigned char irq; 339 unsigned char dma; 340 unsigned char port; 341 }; 342 343 struct compat_if_settings { 344 unsigned int type; /* Type of physical device or protocol */ 345 unsigned int size; /* Size of the data allocated by the caller */ 346 compat_uptr_t ifs_ifsu; /* union of pointers */ 347 }; 348 349 struct compat_ifreq { 350 union { 351 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 352 } ifr_ifrn; 353 union { 354 struct sockaddr ifru_addr; 355 struct sockaddr ifru_dstaddr; 356 struct sockaddr ifru_broadaddr; 357 struct sockaddr ifru_netmask; 358 struct sockaddr ifru_hwaddr; 359 short ifru_flags; 360 compat_int_t ifru_ivalue; 361 compat_int_t ifru_mtu; 362 struct compat_ifmap ifru_map; 363 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 364 char ifru_newname[IFNAMSIZ]; 365 compat_caddr_t ifru_data; 366 struct compat_if_settings ifru_settings; 367 } ifr_ifru; 368 }; 369 370 struct compat_ifconf { 371 compat_int_t ifc_len; /* size of buffer */ 372 compat_caddr_t ifcbuf; 373 }; 374 375 struct compat_robust_list { 376 compat_uptr_t next; 377 }; 378 379 struct compat_robust_list_head { 380 struct compat_robust_list list; 381 compat_long_t futex_offset; 382 compat_uptr_t list_op_pending; 383 }; 384 385 #ifdef CONFIG_COMPAT_OLD_SIGACTION 386 struct compat_old_sigaction { 387 compat_uptr_t sa_handler; 388 compat_old_sigset_t sa_mask; 389 compat_ulong_t sa_flags; 390 compat_uptr_t sa_restorer; 391 }; 392 #endif 393 394 struct compat_keyctl_kdf_params { 395 compat_uptr_t hashname; 396 compat_uptr_t otherinfo; 397 __u32 otherinfolen; 398 __u32 __spare[8]; 399 }; 400 401 struct compat_statfs; 402 struct compat_statfs64; 403 struct compat_old_linux_dirent; 404 struct compat_linux_dirent; 405 struct linux_dirent64; 406 struct compat_msghdr; 407 struct compat_mmsghdr; 408 struct compat_sysinfo; 409 struct compat_sysctl_args; 410 struct compat_kexec_segment; 411 struct compat_mq_attr; 412 struct compat_msgbuf; 413 414 extern void compat_exit_robust_list(struct task_struct *curr); 415 416 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 417 418 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 419 420 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 421 unsigned long bitmap_size); 422 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 423 unsigned long bitmap_size); 424 int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from); 425 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from); 426 int get_compat_sigevent(struct sigevent *event, 427 const struct compat_sigevent __user *u_event); 428 429 static inline int old_timeval32_compare(struct old_timeval32 *lhs, 430 struct old_timeval32 *rhs) 431 { 432 if (lhs->tv_sec < rhs->tv_sec) 433 return -1; 434 if (lhs->tv_sec > rhs->tv_sec) 435 return 1; 436 return lhs->tv_usec - rhs->tv_usec; 437 } 438 439 static inline int old_timespec32_compare(struct old_timespec32 *lhs, 440 struct old_timespec32 *rhs) 441 { 442 if (lhs->tv_sec < rhs->tv_sec) 443 return -1; 444 if (lhs->tv_sec > rhs->tv_sec) 445 return 1; 446 return lhs->tv_nsec - rhs->tv_nsec; 447 } 448 449 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 450 451 /* 452 * Defined inline such that size can be compile time constant, which avoids 453 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 454 */ 455 static inline int 456 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 457 unsigned int size) 458 { 459 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 460 #ifdef __BIG_ENDIAN 461 compat_sigset_t v; 462 switch (_NSIG_WORDS) { 463 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 464 /* fall through */ 465 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 466 /* fall through */ 467 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 468 /* fall through */ 469 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 470 } 471 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 472 #else 473 return copy_to_user(compat, set, size) ? -EFAULT : 0; 474 #endif 475 } 476 477 extern int compat_ptrace_request(struct task_struct *child, 478 compat_long_t request, 479 compat_ulong_t addr, compat_ulong_t data); 480 481 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 482 compat_ulong_t addr, compat_ulong_t data); 483 484 struct epoll_event; /* fortunately, this one is fixed-layout */ 485 486 extern ssize_t compat_rw_copy_check_uvector(int type, 487 const struct compat_iovec __user *uvector, 488 unsigned long nr_segs, 489 unsigned long fast_segs, struct iovec *fast_pointer, 490 struct iovec **ret_pointer); 491 492 extern void __user *compat_alloc_user_space(unsigned long len); 493 494 int compat_restore_altstack(const compat_stack_t __user *uss); 495 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 496 #define compat_save_altstack_ex(uss, sp) do { \ 497 compat_stack_t __user *__uss = uss; \ 498 struct task_struct *t = current; \ 499 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \ 500 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \ 501 put_user_ex(t->sas_ss_size, &__uss->ss_size); \ 502 if (t->sas_ss_flags & SS_AUTODISARM) \ 503 sas_ss_reset(t); \ 504 } while (0); 505 506 /* 507 * These syscall function prototypes are kept in the same order as 508 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 509 * go below. 510 * 511 * Please note that these prototypes here are only provided for information 512 * purposes, for static analysis, and for linking from the syscall table. 513 * These functions should not be called elsewhere from kernel code. 514 * 515 * As the syscall calling convention may be different from the default 516 * for architectures overriding the syscall calling convention, do not 517 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 518 */ 519 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 520 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 521 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 522 u32 __user *iocb); 523 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 524 compat_long_t min_nr, 525 compat_long_t nr, 526 struct io_event __user *events, 527 struct old_timespec32 __user *timeout, 528 const struct __compat_aio_sigset __user *usig); 529 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, 530 compat_long_t min_nr, 531 compat_long_t nr, 532 struct io_event __user *events, 533 struct __kernel_timespec __user *timeout, 534 const struct __compat_aio_sigset __user *usig); 535 536 /* fs/cookies.c */ 537 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 538 539 /* fs/eventpoll.c */ 540 asmlinkage long compat_sys_epoll_pwait(int epfd, 541 struct epoll_event __user *events, 542 int maxevents, int timeout, 543 const compat_sigset_t __user *sigmask, 544 compat_size_t sigsetsize); 545 546 /* fs/fcntl.c */ 547 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 548 compat_ulong_t arg); 549 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 550 compat_ulong_t arg); 551 552 /* fs/ioctl.c */ 553 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 554 compat_ulong_t arg); 555 556 /* fs/namespace.c */ 557 asmlinkage long compat_sys_mount(const char __user *dev_name, 558 const char __user *dir_name, 559 const char __user *type, compat_ulong_t flags, 560 const void __user *data); 561 562 /* fs/open.c */ 563 asmlinkage long compat_sys_statfs(const char __user *pathname, 564 struct compat_statfs __user *buf); 565 asmlinkage long compat_sys_statfs64(const char __user *pathname, 566 compat_size_t sz, 567 struct compat_statfs64 __user *buf); 568 asmlinkage long compat_sys_fstatfs(unsigned int fd, 569 struct compat_statfs __user *buf); 570 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 571 struct compat_statfs64 __user *buf); 572 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 573 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 574 /* No generic prototype for truncate64, ftruncate64, fallocate */ 575 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 576 int flags, umode_t mode); 577 578 /* fs/readdir.c */ 579 asmlinkage long compat_sys_getdents(unsigned int fd, 580 struct compat_linux_dirent __user *dirent, 581 unsigned int count); 582 583 /* fs/read_write.c */ 584 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 585 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd, 586 const struct compat_iovec __user *vec, compat_ulong_t vlen); 587 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd, 588 const struct compat_iovec __user *vec, compat_ulong_t vlen); 589 /* No generic prototype for pread64 and pwrite64 */ 590 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 591 const struct compat_iovec __user *vec, 592 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 593 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 594 const struct compat_iovec __user *vec, 595 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 596 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 597 asmlinkage long compat_sys_preadv64(unsigned long fd, 598 const struct compat_iovec __user *vec, 599 unsigned long vlen, loff_t pos); 600 #endif 601 602 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 603 asmlinkage long compat_sys_pwritev64(unsigned long fd, 604 const struct compat_iovec __user *vec, 605 unsigned long vlen, loff_t pos); 606 #endif 607 608 /* fs/sendfile.c */ 609 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 610 compat_off_t __user *offset, compat_size_t count); 611 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 612 compat_loff_t __user *offset, compat_size_t count); 613 614 /* fs/select.c */ 615 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, 616 compat_ulong_t __user *outp, 617 compat_ulong_t __user *exp, 618 struct old_timespec32 __user *tsp, 619 void __user *sig); 620 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, 621 compat_ulong_t __user *outp, 622 compat_ulong_t __user *exp, 623 struct __kernel_timespec __user *tsp, 624 void __user *sig); 625 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, 626 unsigned int nfds, 627 struct old_timespec32 __user *tsp, 628 const compat_sigset_t __user *sigmask, 629 compat_size_t sigsetsize); 630 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, 631 unsigned int nfds, 632 struct __kernel_timespec __user *tsp, 633 const compat_sigset_t __user *sigmask, 634 compat_size_t sigsetsize); 635 636 /* fs/signalfd.c */ 637 asmlinkage long compat_sys_signalfd4(int ufd, 638 const compat_sigset_t __user *sigmask, 639 compat_size_t sigsetsize, int flags); 640 641 /* fs/splice.c */ 642 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *, 643 unsigned int nr_segs, unsigned int flags); 644 645 /* fs/stat.c */ 646 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 647 const char __user *filename, 648 struct compat_stat __user *statbuf, 649 int flag); 650 asmlinkage long compat_sys_newfstat(unsigned int fd, 651 struct compat_stat __user *statbuf); 652 653 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 654 655 /* kernel/exit.c */ 656 asmlinkage long compat_sys_waitid(int, compat_pid_t, 657 struct compat_siginfo __user *, int, 658 struct compat_rusage __user *); 659 660 661 662 /* kernel/futex.c */ 663 asmlinkage long 664 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 665 compat_size_t len); 666 asmlinkage long 667 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 668 compat_size_t __user *len_ptr); 669 670 /* kernel/itimer.c */ 671 asmlinkage long compat_sys_getitimer(int which, 672 struct compat_itimerval __user *it); 673 asmlinkage long compat_sys_setitimer(int which, 674 struct compat_itimerval __user *in, 675 struct compat_itimerval __user *out); 676 677 /* kernel/kexec.c */ 678 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 679 compat_ulong_t nr_segments, 680 struct compat_kexec_segment __user *, 681 compat_ulong_t flags); 682 683 /* kernel/posix-timers.c */ 684 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 685 struct compat_sigevent __user *timer_event_spec, 686 timer_t __user *created_timer_id); 687 688 /* kernel/ptrace.c */ 689 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 690 compat_long_t addr, compat_long_t data); 691 692 /* kernel/sched/core.c */ 693 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 694 unsigned int len, 695 compat_ulong_t __user *user_mask_ptr); 696 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 697 unsigned int len, 698 compat_ulong_t __user *user_mask_ptr); 699 700 /* kernel/signal.c */ 701 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 702 compat_stack_t __user *uoss_ptr); 703 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 704 compat_size_t sigsetsize); 705 #ifndef CONFIG_ODD_RT_SIGACTION 706 asmlinkage long compat_sys_rt_sigaction(int, 707 const struct compat_sigaction __user *, 708 struct compat_sigaction __user *, 709 compat_size_t); 710 #endif 711 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 712 compat_sigset_t __user *oset, 713 compat_size_t sigsetsize); 714 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 715 compat_size_t sigsetsize); 716 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, 717 struct compat_siginfo __user *uinfo, 718 struct old_timespec32 __user *uts, compat_size_t sigsetsize); 719 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, 720 struct compat_siginfo __user *uinfo, 721 struct __kernel_timespec __user *uts, compat_size_t sigsetsize); 722 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 723 struct compat_siginfo __user *uinfo); 724 /* No generic prototype for rt_sigreturn */ 725 726 /* kernel/sys.c */ 727 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 728 asmlinkage long compat_sys_getrlimit(unsigned int resource, 729 struct compat_rlimit __user *rlim); 730 asmlinkage long compat_sys_setrlimit(unsigned int resource, 731 struct compat_rlimit __user *rlim); 732 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 733 734 /* kernel/time.c */ 735 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, 736 struct timezone __user *tz); 737 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, 738 struct timezone __user *tz); 739 740 /* kernel/timer.c */ 741 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 742 743 /* ipc/mqueue.c */ 744 asmlinkage long compat_sys_mq_open(const char __user *u_name, 745 int oflag, compat_mode_t mode, 746 struct compat_mq_attr __user *u_attr); 747 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 748 const struct compat_sigevent __user *u_notification); 749 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 750 const struct compat_mq_attr __user *u_mqstat, 751 struct compat_mq_attr __user *u_omqstat); 752 753 /* ipc/msg.c */ 754 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 755 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 756 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 757 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 758 compat_ssize_t msgsz, int msgflg); 759 760 /* ipc/sem.c */ 761 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 762 763 /* ipc/shm.c */ 764 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 765 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 766 767 /* net/socket.c */ 768 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 769 unsigned flags, struct sockaddr __user *addr, 770 int __user *addrlen); 771 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 772 char __user *optval, unsigned int optlen); 773 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 774 char __user *optval, int __user *optlen); 775 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 776 unsigned flags); 777 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 778 unsigned int flags); 779 780 /* mm/filemap.c: No generic prototype for readahead */ 781 782 /* security/keys/keyctl.c */ 783 asmlinkage long compat_sys_keyctl(u32 option, 784 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 785 786 /* arch/example/kernel/sys_example.c */ 787 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 788 const compat_uptr_t __user *envp); 789 790 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 791 792 /* mm/, CONFIG_MMU only */ 793 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 794 compat_ulong_t mode, 795 compat_ulong_t __user *nmask, 796 compat_ulong_t maxnode, compat_ulong_t flags); 797 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 798 compat_ulong_t __user *nmask, 799 compat_ulong_t maxnode, 800 compat_ulong_t addr, 801 compat_ulong_t flags); 802 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 803 compat_ulong_t maxnode); 804 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 805 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 806 const compat_ulong_t __user *new_nodes); 807 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 808 __u32 __user *pages, 809 const int __user *nodes, 810 int __user *status, 811 int flags); 812 813 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 814 compat_pid_t pid, int sig, 815 struct compat_siginfo __user *uinfo); 816 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, 817 unsigned vlen, unsigned int flags, 818 struct __kernel_timespec __user *timeout); 819 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, 820 unsigned vlen, unsigned int flags, 821 struct old_timespec32 __user *timeout); 822 asmlinkage long compat_sys_wait4(compat_pid_t pid, 823 compat_uint_t __user *stat_addr, int options, 824 struct compat_rusage __user *ru); 825 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 826 int, const char __user *); 827 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 828 struct file_handle __user *handle, 829 int flags); 830 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 831 unsigned vlen, unsigned int flags); 832 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid, 833 const struct compat_iovec __user *lvec, 834 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 835 compat_ulong_t riovcnt, compat_ulong_t flags); 836 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid, 837 const struct compat_iovec __user *lvec, 838 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 839 compat_ulong_t riovcnt, compat_ulong_t flags); 840 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 841 const compat_uptr_t __user *argv, 842 const compat_uptr_t __user *envp, int flags); 843 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 844 const struct compat_iovec __user *vec, 845 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 846 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 847 const struct compat_iovec __user *vec, 848 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 849 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 850 asmlinkage long compat_sys_readv64v2(unsigned long fd, 851 const struct compat_iovec __user *vec, 852 unsigned long vlen, loff_t pos, rwf_t flags); 853 #endif 854 855 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 856 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 857 const struct compat_iovec __user *vec, 858 unsigned long vlen, loff_t pos, rwf_t flags); 859 #endif 860 861 862 /* 863 * Deprecated system calls which are still defined in 864 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 865 */ 866 867 /* __ARCH_WANT_SYSCALL_NO_AT */ 868 asmlinkage long compat_sys_open(const char __user *filename, int flags, 869 umode_t mode); 870 871 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 872 asmlinkage long compat_sys_signalfd(int ufd, 873 const compat_sigset_t __user *sigmask, 874 compat_size_t sigsetsize); 875 876 /* __ARCH_WANT_SYSCALL_OFF_T */ 877 asmlinkage long compat_sys_newstat(const char __user *filename, 878 struct compat_stat __user *statbuf); 879 asmlinkage long compat_sys_newlstat(const char __user *filename, 880 struct compat_stat __user *statbuf); 881 882 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 883 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 884 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 885 struct old_timeval32 __user *tvp); 886 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 887 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 888 unsigned flags); 889 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args); 890 891 /* obsolete: fs/readdir.c */ 892 asmlinkage long compat_sys_old_readdir(unsigned int fd, 893 struct compat_old_linux_dirent __user *, 894 unsigned int count); 895 896 /* obsolete: fs/select.c */ 897 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 898 899 /* obsolete: ipc */ 900 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 901 902 /* obsolete: kernel/signal.c */ 903 #ifdef __ARCH_WANT_SYS_SIGPENDING 904 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 905 #endif 906 907 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 908 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 909 compat_old_sigset_t __user *oset); 910 #endif 911 #ifdef CONFIG_COMPAT_OLD_SIGACTION 912 asmlinkage long compat_sys_sigaction(int sig, 913 const struct compat_old_sigaction __user *act, 914 struct compat_old_sigaction __user *oact); 915 #endif 916 917 /* obsolete: net/socket.c */ 918 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 919 920 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 921 922 923 /* 924 * For most but not all architectures, "am I in a compat syscall?" and 925 * "am I a compat task?" are the same question. For architectures on which 926 * they aren't the same question, arch code can override in_compat_syscall. 927 */ 928 929 #ifndef in_compat_syscall 930 static inline bool in_compat_syscall(void) { return is_compat_task(); } 931 #endif 932 933 /** 934 * ns_to_old_timeval32 - Compat version of ns_to_timeval 935 * @nsec: the nanoseconds value to be converted 936 * 937 * Returns the old_timeval32 representation of the nsec parameter. 938 */ 939 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 940 { 941 struct timeval tv; 942 struct old_timeval32 ctv; 943 944 tv = ns_to_timeval(nsec); 945 ctv.tv_sec = tv.tv_sec; 946 ctv.tv_usec = tv.tv_usec; 947 948 return ctv; 949 } 950 951 /* 952 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) 953 * directly. Instead, use one of the functions which work equivalently, such 954 * as the kcompat_sys_xyzyyz() functions prototyped below. 955 */ 956 957 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, 958 struct compat_statfs64 __user * buf); 959 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 960 struct compat_statfs64 __user * buf); 961 962 #else /* !CONFIG_COMPAT */ 963 964 #define is_compat_task() (0) 965 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ 966 #define in_compat_syscall in_compat_syscall 967 static inline bool in_compat_syscall(void) { return false; } 968 969 #endif /* CONFIG_COMPAT */ 970 971 #endif /* _LINUX_COMPAT_H */ 972