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