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 struct compat_timex { 136 compat_uint_t modes; 137 compat_long_t offset; 138 compat_long_t freq; 139 compat_long_t maxerror; 140 compat_long_t esterror; 141 compat_int_t status; 142 compat_long_t constant; 143 compat_long_t precision; 144 compat_long_t tolerance; 145 struct old_timeval32 time; 146 compat_long_t tick; 147 compat_long_t ppsfreq; 148 compat_long_t jitter; 149 compat_int_t shift; 150 compat_long_t stabil; 151 compat_long_t jitcnt; 152 compat_long_t calcnt; 153 compat_long_t errcnt; 154 compat_long_t stbcnt; 155 compat_int_t tai; 156 157 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32; 158 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32; 159 compat_int_t:32; compat_int_t:32; compat_int_t:32; 160 }; 161 162 struct timex; 163 int compat_get_timex(struct timex *, const struct compat_timex __user *); 164 int compat_put_timex(struct compat_timex __user *, const struct timex *); 165 166 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) 167 168 typedef struct { 169 compat_sigset_word sig[_COMPAT_NSIG_WORDS]; 170 } compat_sigset_t; 171 172 int set_compat_user_sigmask(const compat_sigset_t __user *usigmask, 173 sigset_t *set, sigset_t *oldset, 174 size_t sigsetsize); 175 176 struct compat_sigaction { 177 #ifndef __ARCH_HAS_IRIX_SIGACTION 178 compat_uptr_t sa_handler; 179 compat_ulong_t sa_flags; 180 #else 181 compat_uint_t sa_flags; 182 compat_uptr_t sa_handler; 183 #endif 184 #ifdef __ARCH_HAS_SA_RESTORER 185 compat_uptr_t sa_restorer; 186 #endif 187 compat_sigset_t sa_mask __packed; 188 }; 189 190 typedef union compat_sigval { 191 compat_int_t sival_int; 192 compat_uptr_t sival_ptr; 193 } compat_sigval_t; 194 195 typedef struct compat_siginfo { 196 int si_signo; 197 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 198 int si_errno; 199 int si_code; 200 #else 201 int si_code; 202 int si_errno; 203 #endif 204 205 union { 206 int _pad[128/sizeof(int) - 3]; 207 208 /* kill() */ 209 struct { 210 compat_pid_t _pid; /* sender's pid */ 211 __compat_uid32_t _uid; /* sender's uid */ 212 } _kill; 213 214 /* POSIX.1b timers */ 215 struct { 216 compat_timer_t _tid; /* timer id */ 217 int _overrun; /* overrun count */ 218 compat_sigval_t _sigval; /* same as below */ 219 } _timer; 220 221 /* POSIX.1b signals */ 222 struct { 223 compat_pid_t _pid; /* sender's pid */ 224 __compat_uid32_t _uid; /* sender's uid */ 225 compat_sigval_t _sigval; 226 } _rt; 227 228 /* SIGCHLD */ 229 struct { 230 compat_pid_t _pid; /* which child */ 231 __compat_uid32_t _uid; /* sender's uid */ 232 int _status; /* exit code */ 233 compat_clock_t _utime; 234 compat_clock_t _stime; 235 } _sigchld; 236 237 #ifdef CONFIG_X86_X32_ABI 238 /* SIGCHLD (x32 version) */ 239 struct { 240 compat_pid_t _pid; /* which child */ 241 __compat_uid32_t _uid; /* sender's uid */ 242 int _status; /* exit code */ 243 compat_s64 _utime; 244 compat_s64 _stime; 245 } _sigchld_x32; 246 #endif 247 248 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */ 249 struct { 250 compat_uptr_t _addr; /* faulting insn/memory ref. */ 251 #ifdef __ARCH_SI_TRAPNO 252 int _trapno; /* TRAP # which caused the signal */ 253 #endif 254 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ 255 sizeof(short) : __alignof__(compat_uptr_t)) 256 union { 257 /* 258 * used when si_code=BUS_MCEERR_AR or 259 * used when si_code=BUS_MCEERR_AO 260 */ 261 short int _addr_lsb; /* Valid LSB of the reported address. */ 262 /* used when si_code=SEGV_BNDERR */ 263 struct { 264 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD]; 265 compat_uptr_t _lower; 266 compat_uptr_t _upper; 267 } _addr_bnd; 268 /* used when si_code=SEGV_PKUERR */ 269 struct { 270 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD]; 271 u32 _pkey; 272 } _addr_pkey; 273 }; 274 } _sigfault; 275 276 /* SIGPOLL */ 277 struct { 278 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 279 int _fd; 280 } _sigpoll; 281 282 struct { 283 compat_uptr_t _call_addr; /* calling user insn */ 284 int _syscall; /* triggering system call number */ 285 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 286 } _sigsys; 287 } _sifields; 288 } compat_siginfo_t; 289 290 /* 291 * These functions operate on 32- or 64-bit specs depending on 292 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments. 293 */ 294 extern int compat_get_timespec(struct timespec *, const void __user *); 295 extern int compat_put_timespec(const struct timespec *, void __user *); 296 extern int compat_get_timeval(struct timeval *, const void __user *); 297 extern int compat_put_timeval(const struct timeval *, void __user *); 298 299 struct compat_iovec { 300 compat_uptr_t iov_base; 301 compat_size_t iov_len; 302 }; 303 304 struct compat_rlimit { 305 compat_ulong_t rlim_cur; 306 compat_ulong_t rlim_max; 307 }; 308 309 struct compat_rusage { 310 struct old_timeval32 ru_utime; 311 struct old_timeval32 ru_stime; 312 compat_long_t ru_maxrss; 313 compat_long_t ru_ixrss; 314 compat_long_t ru_idrss; 315 compat_long_t ru_isrss; 316 compat_long_t ru_minflt; 317 compat_long_t ru_majflt; 318 compat_long_t ru_nswap; 319 compat_long_t ru_inblock; 320 compat_long_t ru_oublock; 321 compat_long_t ru_msgsnd; 322 compat_long_t ru_msgrcv; 323 compat_long_t ru_nsignals; 324 compat_long_t ru_nvcsw; 325 compat_long_t ru_nivcsw; 326 }; 327 328 extern int put_compat_rusage(const struct rusage *, 329 struct compat_rusage __user *); 330 331 struct compat_siginfo; 332 struct __compat_aio_sigset; 333 334 struct compat_dirent { 335 u32 d_ino; 336 compat_off_t d_off; 337 u16 d_reclen; 338 char d_name[256]; 339 }; 340 341 struct compat_ustat { 342 compat_daddr_t f_tfree; 343 compat_ino_t f_tinode; 344 char f_fname[6]; 345 char f_fpack[6]; 346 }; 347 348 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 349 350 typedef struct compat_sigevent { 351 compat_sigval_t sigev_value; 352 compat_int_t sigev_signo; 353 compat_int_t sigev_notify; 354 union { 355 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 356 compat_int_t _tid; 357 358 struct { 359 compat_uptr_t _function; 360 compat_uptr_t _attribute; 361 } _sigev_thread; 362 } _sigev_un; 363 } compat_sigevent_t; 364 365 struct compat_ifmap { 366 compat_ulong_t mem_start; 367 compat_ulong_t mem_end; 368 unsigned short base_addr; 369 unsigned char irq; 370 unsigned char dma; 371 unsigned char port; 372 }; 373 374 struct compat_if_settings { 375 unsigned int type; /* Type of physical device or protocol */ 376 unsigned int size; /* Size of the data allocated by the caller */ 377 compat_uptr_t ifs_ifsu; /* union of pointers */ 378 }; 379 380 struct compat_ifreq { 381 union { 382 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 383 } ifr_ifrn; 384 union { 385 struct sockaddr ifru_addr; 386 struct sockaddr ifru_dstaddr; 387 struct sockaddr ifru_broadaddr; 388 struct sockaddr ifru_netmask; 389 struct sockaddr ifru_hwaddr; 390 short ifru_flags; 391 compat_int_t ifru_ivalue; 392 compat_int_t ifru_mtu; 393 struct compat_ifmap ifru_map; 394 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 395 char ifru_newname[IFNAMSIZ]; 396 compat_caddr_t ifru_data; 397 struct compat_if_settings ifru_settings; 398 } ifr_ifru; 399 }; 400 401 struct compat_ifconf { 402 compat_int_t ifc_len; /* size of buffer */ 403 compat_caddr_t ifcbuf; 404 }; 405 406 struct compat_robust_list { 407 compat_uptr_t next; 408 }; 409 410 struct compat_robust_list_head { 411 struct compat_robust_list list; 412 compat_long_t futex_offset; 413 compat_uptr_t list_op_pending; 414 }; 415 416 #ifdef CONFIG_COMPAT_OLD_SIGACTION 417 struct compat_old_sigaction { 418 compat_uptr_t sa_handler; 419 compat_old_sigset_t sa_mask; 420 compat_ulong_t sa_flags; 421 compat_uptr_t sa_restorer; 422 }; 423 #endif 424 425 struct compat_keyctl_kdf_params { 426 compat_uptr_t hashname; 427 compat_uptr_t otherinfo; 428 __u32 otherinfolen; 429 __u32 __spare[8]; 430 }; 431 432 struct compat_statfs; 433 struct compat_statfs64; 434 struct compat_old_linux_dirent; 435 struct compat_linux_dirent; 436 struct linux_dirent64; 437 struct compat_msghdr; 438 struct compat_mmsghdr; 439 struct compat_sysinfo; 440 struct compat_sysctl_args; 441 struct compat_kexec_segment; 442 struct compat_mq_attr; 443 struct compat_msgbuf; 444 445 extern void compat_exit_robust_list(struct task_struct *curr); 446 447 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 448 449 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 450 451 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 452 unsigned long bitmap_size); 453 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 454 unsigned long bitmap_size); 455 int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from); 456 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from); 457 int get_compat_sigevent(struct sigevent *event, 458 const struct compat_sigevent __user *u_event); 459 460 static inline int old_timeval32_compare(struct old_timeval32 *lhs, 461 struct old_timeval32 *rhs) 462 { 463 if (lhs->tv_sec < rhs->tv_sec) 464 return -1; 465 if (lhs->tv_sec > rhs->tv_sec) 466 return 1; 467 return lhs->tv_usec - rhs->tv_usec; 468 } 469 470 static inline int old_timespec32_compare(struct old_timespec32 *lhs, 471 struct old_timespec32 *rhs) 472 { 473 if (lhs->tv_sec < rhs->tv_sec) 474 return -1; 475 if (lhs->tv_sec > rhs->tv_sec) 476 return 1; 477 return lhs->tv_nsec - rhs->tv_nsec; 478 } 479 480 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 481 482 /* 483 * Defined inline such that size can be compile time constant, which avoids 484 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 485 */ 486 static inline int 487 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 488 unsigned int size) 489 { 490 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 491 #ifdef __BIG_ENDIAN 492 compat_sigset_t v; 493 switch (_NSIG_WORDS) { 494 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 495 /* fall through */ 496 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 497 /* fall through */ 498 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 499 /* fall through */ 500 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 501 } 502 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 503 #else 504 return copy_to_user(compat, set, size) ? -EFAULT : 0; 505 #endif 506 } 507 508 extern int compat_ptrace_request(struct task_struct *child, 509 compat_long_t request, 510 compat_ulong_t addr, compat_ulong_t data); 511 512 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 513 compat_ulong_t addr, compat_ulong_t data); 514 515 struct epoll_event; /* fortunately, this one is fixed-layout */ 516 517 extern ssize_t compat_rw_copy_check_uvector(int type, 518 const struct compat_iovec __user *uvector, 519 unsigned long nr_segs, 520 unsigned long fast_segs, struct iovec *fast_pointer, 521 struct iovec **ret_pointer); 522 523 extern void __user *compat_alloc_user_space(unsigned long len); 524 525 int compat_restore_altstack(const compat_stack_t __user *uss); 526 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 527 #define compat_save_altstack_ex(uss, sp) do { \ 528 compat_stack_t __user *__uss = uss; \ 529 struct task_struct *t = current; \ 530 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \ 531 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \ 532 put_user_ex(t->sas_ss_size, &__uss->ss_size); \ 533 if (t->sas_ss_flags & SS_AUTODISARM) \ 534 sas_ss_reset(t); \ 535 } while (0); 536 537 /* 538 * These syscall function prototypes are kept in the same order as 539 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 540 * go below. 541 * 542 * Please note that these prototypes here are only provided for information 543 * purposes, for static analysis, and for linking from the syscall table. 544 * These functions should not be called elsewhere from kernel code. 545 * 546 * As the syscall calling convention may be different from the default 547 * for architectures overriding the syscall calling convention, do not 548 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 549 */ 550 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 551 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 552 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 553 u32 __user *iocb); 554 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id, 555 compat_long_t min_nr, 556 compat_long_t nr, 557 struct io_event __user *events, 558 struct old_timespec32 __user *timeout); 559 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 560 compat_long_t min_nr, 561 compat_long_t nr, 562 struct io_event __user *events, 563 struct old_timespec32 __user *timeout, 564 const struct __compat_aio_sigset __user *usig); 565 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, 566 compat_long_t min_nr, 567 compat_long_t nr, 568 struct io_event __user *events, 569 struct __kernel_timespec __user *timeout, 570 const struct __compat_aio_sigset __user *usig); 571 572 /* fs/cookies.c */ 573 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 574 575 /* fs/eventpoll.c */ 576 asmlinkage long compat_sys_epoll_pwait(int epfd, 577 struct epoll_event __user *events, 578 int maxevents, int timeout, 579 const compat_sigset_t __user *sigmask, 580 compat_size_t sigsetsize); 581 582 /* fs/fcntl.c */ 583 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 584 compat_ulong_t arg); 585 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 586 compat_ulong_t arg); 587 588 /* fs/ioctl.c */ 589 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 590 compat_ulong_t arg); 591 592 /* fs/namespace.c */ 593 asmlinkage long compat_sys_mount(const char __user *dev_name, 594 const char __user *dir_name, 595 const char __user *type, compat_ulong_t flags, 596 const void __user *data); 597 598 /* fs/open.c */ 599 asmlinkage long compat_sys_statfs(const char __user *pathname, 600 struct compat_statfs __user *buf); 601 asmlinkage long compat_sys_statfs64(const char __user *pathname, 602 compat_size_t sz, 603 struct compat_statfs64 __user *buf); 604 asmlinkage long compat_sys_fstatfs(unsigned int fd, 605 struct compat_statfs __user *buf); 606 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 607 struct compat_statfs64 __user *buf); 608 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 609 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 610 /* No generic prototype for truncate64, ftruncate64, fallocate */ 611 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 612 int flags, umode_t mode); 613 614 /* fs/readdir.c */ 615 asmlinkage long compat_sys_getdents(unsigned int fd, 616 struct compat_linux_dirent __user *dirent, 617 unsigned int count); 618 619 /* fs/read_write.c */ 620 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 621 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd, 622 const struct compat_iovec __user *vec, compat_ulong_t vlen); 623 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd, 624 const struct compat_iovec __user *vec, compat_ulong_t vlen); 625 /* No generic prototype for pread64 and pwrite64 */ 626 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 627 const struct compat_iovec __user *vec, 628 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 629 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 630 const struct compat_iovec __user *vec, 631 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 632 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 633 asmlinkage long compat_sys_preadv64(unsigned long fd, 634 const struct compat_iovec __user *vec, 635 unsigned long vlen, loff_t pos); 636 #endif 637 638 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 639 asmlinkage long compat_sys_pwritev64(unsigned long fd, 640 const struct compat_iovec __user *vec, 641 unsigned long vlen, loff_t pos); 642 #endif 643 644 /* fs/sendfile.c */ 645 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 646 compat_off_t __user *offset, compat_size_t count); 647 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 648 compat_loff_t __user *offset, compat_size_t count); 649 650 /* fs/select.c */ 651 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, 652 compat_ulong_t __user *outp, 653 compat_ulong_t __user *exp, 654 struct old_timespec32 __user *tsp, 655 void __user *sig); 656 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, 657 compat_ulong_t __user *outp, 658 compat_ulong_t __user *exp, 659 struct __kernel_timespec __user *tsp, 660 void __user *sig); 661 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, 662 unsigned int nfds, 663 struct old_timespec32 __user *tsp, 664 const compat_sigset_t __user *sigmask, 665 compat_size_t sigsetsize); 666 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, 667 unsigned int nfds, 668 struct __kernel_timespec __user *tsp, 669 const compat_sigset_t __user *sigmask, 670 compat_size_t sigsetsize); 671 672 /* fs/signalfd.c */ 673 asmlinkage long compat_sys_signalfd4(int ufd, 674 const compat_sigset_t __user *sigmask, 675 compat_size_t sigsetsize, int flags); 676 677 /* fs/splice.c */ 678 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *, 679 unsigned int nr_segs, unsigned int flags); 680 681 /* fs/stat.c */ 682 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 683 const char __user *filename, 684 struct compat_stat __user *statbuf, 685 int flag); 686 asmlinkage long compat_sys_newfstat(unsigned int fd, 687 struct compat_stat __user *statbuf); 688 689 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 690 691 /* fs/timerfd.c */ 692 asmlinkage long compat_sys_timerfd_gettime(int ufd, 693 struct old_itimerspec32 __user *otmr); 694 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, 695 const struct old_itimerspec32 __user *utmr, 696 struct old_itimerspec32 __user *otmr); 697 698 /* fs/utimes.c */ 699 asmlinkage long compat_sys_utimensat(unsigned int dfd, 700 const char __user *filename, 701 struct old_timespec32 __user *t, 702 int flags); 703 704 /* kernel/exit.c */ 705 asmlinkage long compat_sys_waitid(int, compat_pid_t, 706 struct compat_siginfo __user *, int, 707 struct compat_rusage __user *); 708 709 710 711 /* kernel/futex.c */ 712 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val, 713 struct old_timespec32 __user *utime, u32 __user *uaddr2, 714 u32 val3); 715 asmlinkage long 716 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 717 compat_size_t len); 718 asmlinkage long 719 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 720 compat_size_t __user *len_ptr); 721 722 /* kernel/hrtimer.c */ 723 asmlinkage long compat_sys_nanosleep(struct old_timespec32 __user *rqtp, 724 struct old_timespec32 __user *rmtp); 725 726 /* kernel/itimer.c */ 727 asmlinkage long compat_sys_getitimer(int which, 728 struct compat_itimerval __user *it); 729 asmlinkage long compat_sys_setitimer(int which, 730 struct compat_itimerval __user *in, 731 struct compat_itimerval __user *out); 732 733 /* kernel/kexec.c */ 734 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 735 compat_ulong_t nr_segments, 736 struct compat_kexec_segment __user *, 737 compat_ulong_t flags); 738 739 /* kernel/posix-timers.c */ 740 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 741 struct compat_sigevent __user *timer_event_spec, 742 timer_t __user *created_timer_id); 743 asmlinkage long compat_sys_timer_gettime(timer_t timer_id, 744 struct old_itimerspec32 __user *setting); 745 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags, 746 struct old_itimerspec32 __user *new, 747 struct old_itimerspec32 __user *old); 748 asmlinkage long compat_sys_clock_settime(clockid_t which_clock, 749 struct old_timespec32 __user *tp); 750 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock, 751 struct old_timespec32 __user *tp); 752 asmlinkage long compat_sys_clock_getres(clockid_t which_clock, 753 struct old_timespec32 __user *tp); 754 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, 755 struct old_timespec32 __user *rqtp, 756 struct old_timespec32 __user *rmtp); 757 758 /* kernel/ptrace.c */ 759 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 760 compat_long_t addr, compat_long_t data); 761 762 /* kernel/sched/core.c */ 763 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 764 unsigned int len, 765 compat_ulong_t __user *user_mask_ptr); 766 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 767 unsigned int len, 768 compat_ulong_t __user *user_mask_ptr); 769 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, 770 struct old_timespec32 __user *interval); 771 772 /* kernel/signal.c */ 773 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 774 compat_stack_t __user *uoss_ptr); 775 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 776 compat_size_t sigsetsize); 777 #ifndef CONFIG_ODD_RT_SIGACTION 778 asmlinkage long compat_sys_rt_sigaction(int, 779 const struct compat_sigaction __user *, 780 struct compat_sigaction __user *, 781 compat_size_t); 782 #endif 783 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 784 compat_sigset_t __user *oset, 785 compat_size_t sigsetsize); 786 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 787 compat_size_t sigsetsize); 788 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese, 789 struct compat_siginfo __user *uinfo, 790 struct old_timespec32 __user *uts, compat_size_t sigsetsize); 791 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, 792 struct compat_siginfo __user *uinfo, 793 struct __kernel_timespec __user *uts, compat_size_t sigsetsize); 794 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 795 struct compat_siginfo __user *uinfo); 796 /* No generic prototype for rt_sigreturn */ 797 798 /* kernel/sys.c */ 799 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 800 asmlinkage long compat_sys_getrlimit(unsigned int resource, 801 struct compat_rlimit __user *rlim); 802 asmlinkage long compat_sys_setrlimit(unsigned int resource, 803 struct compat_rlimit __user *rlim); 804 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 805 806 /* kernel/time.c */ 807 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, 808 struct timezone __user *tz); 809 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, 810 struct timezone __user *tz); 811 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp); 812 813 /* kernel/timer.c */ 814 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 815 816 /* ipc/mqueue.c */ 817 asmlinkage long compat_sys_mq_open(const char __user *u_name, 818 int oflag, compat_mode_t mode, 819 struct compat_mq_attr __user *u_attr); 820 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes, 821 const char __user *u_msg_ptr, 822 compat_size_t msg_len, unsigned int msg_prio, 823 const struct old_timespec32 __user *u_abs_timeout); 824 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes, 825 char __user *u_msg_ptr, 826 compat_size_t msg_len, unsigned int __user *u_msg_prio, 827 const struct old_timespec32 __user *u_abs_timeout); 828 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 829 const struct compat_sigevent __user *u_notification); 830 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 831 const struct compat_mq_attr __user *u_mqstat, 832 struct compat_mq_attr __user *u_omqstat); 833 834 /* ipc/msg.c */ 835 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 836 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 837 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 838 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 839 compat_ssize_t msgsz, int msgflg); 840 841 /* ipc/sem.c */ 842 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 843 asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, 844 unsigned nsems, const struct old_timespec32 __user *timeout); 845 846 /* ipc/shm.c */ 847 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 848 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 849 850 /* net/socket.c */ 851 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 852 unsigned flags, struct sockaddr __user *addr, 853 int __user *addrlen); 854 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 855 char __user *optval, unsigned int optlen); 856 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 857 char __user *optval, int __user *optlen); 858 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 859 unsigned flags); 860 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 861 unsigned int flags); 862 863 /* mm/filemap.c: No generic prototype for readahead */ 864 865 /* security/keys/keyctl.c */ 866 asmlinkage long compat_sys_keyctl(u32 option, 867 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 868 869 /* arch/example/kernel/sys_example.c */ 870 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 871 const compat_uptr_t __user *envp); 872 873 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 874 875 /* mm/, CONFIG_MMU only */ 876 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 877 compat_ulong_t mode, 878 compat_ulong_t __user *nmask, 879 compat_ulong_t maxnode, compat_ulong_t flags); 880 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 881 compat_ulong_t __user *nmask, 882 compat_ulong_t maxnode, 883 compat_ulong_t addr, 884 compat_ulong_t flags); 885 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 886 compat_ulong_t maxnode); 887 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 888 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 889 const compat_ulong_t __user *new_nodes); 890 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 891 __u32 __user *pages, 892 const int __user *nodes, 893 int __user *status, 894 int flags); 895 896 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 897 compat_pid_t pid, int sig, 898 struct compat_siginfo __user *uinfo); 899 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, 900 unsigned vlen, unsigned int flags, 901 struct __kernel_timespec __user *timeout); 902 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, 903 unsigned vlen, unsigned int flags, 904 struct old_timespec32 __user *timeout); 905 asmlinkage long compat_sys_wait4(compat_pid_t pid, 906 compat_uint_t __user *stat_addr, int options, 907 struct compat_rusage __user *ru); 908 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 909 int, const char __user *); 910 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 911 struct file_handle __user *handle, 912 int flags); 913 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock, 914 struct compat_timex __user *tp); 915 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 916 unsigned vlen, unsigned int flags); 917 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid, 918 const struct compat_iovec __user *lvec, 919 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 920 compat_ulong_t riovcnt, compat_ulong_t flags); 921 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid, 922 const struct compat_iovec __user *lvec, 923 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 924 compat_ulong_t riovcnt, compat_ulong_t flags); 925 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 926 const compat_uptr_t __user *argv, 927 const compat_uptr_t __user *envp, int flags); 928 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 929 const struct compat_iovec __user *vec, 930 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 931 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 932 const struct compat_iovec __user *vec, 933 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 934 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 935 asmlinkage long compat_sys_readv64v2(unsigned long fd, 936 const struct compat_iovec __user *vec, 937 unsigned long vlen, loff_t pos, rwf_t flags); 938 #endif 939 940 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 941 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 942 const struct compat_iovec __user *vec, 943 unsigned long vlen, loff_t pos, rwf_t flags); 944 #endif 945 946 947 /* 948 * Deprecated system calls which are still defined in 949 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 950 */ 951 952 /* __ARCH_WANT_SYSCALL_NO_AT */ 953 asmlinkage long compat_sys_open(const char __user *filename, int flags, 954 umode_t mode); 955 asmlinkage long compat_sys_utimes(const char __user *filename, 956 struct old_timeval32 __user *t); 957 958 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 959 asmlinkage long compat_sys_signalfd(int ufd, 960 const compat_sigset_t __user *sigmask, 961 compat_size_t sigsetsize); 962 963 /* __ARCH_WANT_SYSCALL_OFF_T */ 964 asmlinkage long compat_sys_newstat(const char __user *filename, 965 struct compat_stat __user *statbuf); 966 asmlinkage long compat_sys_newlstat(const char __user *filename, 967 struct compat_stat __user *statbuf); 968 969 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 970 asmlinkage long compat_sys_time(old_time32_t __user *tloc); 971 asmlinkage long compat_sys_utime(const char __user *filename, 972 struct old_utimbuf32 __user *t); 973 asmlinkage long compat_sys_futimesat(unsigned int dfd, 974 const char __user *filename, 975 struct old_timeval32 __user *t); 976 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 977 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 978 struct old_timeval32 __user *tvp); 979 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 980 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 981 unsigned flags); 982 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args); 983 984 /* obsolete: fs/readdir.c */ 985 asmlinkage long compat_sys_old_readdir(unsigned int fd, 986 struct compat_old_linux_dirent __user *, 987 unsigned int count); 988 989 /* obsolete: fs/select.c */ 990 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 991 992 /* obsolete: ipc */ 993 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 994 995 /* obsolete: kernel/signal.c */ 996 #ifdef __ARCH_WANT_SYS_SIGPENDING 997 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 998 #endif 999 1000 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 1001 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 1002 compat_old_sigset_t __user *oset); 1003 #endif 1004 #ifdef CONFIG_COMPAT_OLD_SIGACTION 1005 asmlinkage long compat_sys_sigaction(int sig, 1006 const struct compat_old_sigaction __user *act, 1007 struct compat_old_sigaction __user *oact); 1008 #endif 1009 1010 /* obsolete: kernel/time/time.c */ 1011 asmlinkage long compat_sys_stime(old_time32_t __user *tptr); 1012 1013 /* obsolete: net/socket.c */ 1014 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 1015 1016 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 1017 1018 1019 /* 1020 * For most but not all architectures, "am I in a compat syscall?" and 1021 * "am I a compat task?" are the same question. For architectures on which 1022 * they aren't the same question, arch code can override in_compat_syscall. 1023 */ 1024 1025 #ifndef in_compat_syscall 1026 static inline bool in_compat_syscall(void) { return is_compat_task(); } 1027 #endif 1028 1029 /** 1030 * ns_to_old_timeval32 - Compat version of ns_to_timeval 1031 * @nsec: the nanoseconds value to be converted 1032 * 1033 * Returns the old_timeval32 representation of the nsec parameter. 1034 */ 1035 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 1036 { 1037 struct timeval tv; 1038 struct old_timeval32 ctv; 1039 1040 tv = ns_to_timeval(nsec); 1041 ctv.tv_sec = tv.tv_sec; 1042 ctv.tv_usec = tv.tv_usec; 1043 1044 return ctv; 1045 } 1046 1047 /* 1048 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) 1049 * directly. Instead, use one of the functions which work equivalently, such 1050 * as the kcompat_sys_xyzyyz() functions prototyped below. 1051 */ 1052 1053 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, 1054 struct compat_statfs64 __user * buf); 1055 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 1056 struct compat_statfs64 __user * buf); 1057 1058 #else /* !CONFIG_COMPAT */ 1059 1060 #define is_compat_task() (0) 1061 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ 1062 #define in_compat_syscall in_compat_syscall 1063 static inline bool in_compat_syscall(void) { return false; } 1064 1065 #endif /* CONFIG_COMPAT */ 1066 1067 #endif /* _LINUX_COMPAT_H */ 1068