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 old_itimerval32; 120 121 struct compat_tms { 122 compat_clock_t tms_utime; 123 compat_clock_t tms_stime; 124 compat_clock_t tms_cutime; 125 compat_clock_t tms_cstime; 126 }; 127 128 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) 129 130 typedef struct { 131 compat_sigset_word sig[_COMPAT_NSIG_WORDS]; 132 } compat_sigset_t; 133 134 int set_compat_user_sigmask(const compat_sigset_t __user *umask, 135 size_t sigsetsize); 136 137 struct compat_sigaction { 138 #ifndef __ARCH_HAS_IRIX_SIGACTION 139 compat_uptr_t sa_handler; 140 compat_ulong_t sa_flags; 141 #else 142 compat_uint_t sa_flags; 143 compat_uptr_t sa_handler; 144 #endif 145 #ifdef __ARCH_HAS_SA_RESTORER 146 compat_uptr_t sa_restorer; 147 #endif 148 compat_sigset_t sa_mask __packed; 149 }; 150 151 typedef union compat_sigval { 152 compat_int_t sival_int; 153 compat_uptr_t sival_ptr; 154 } compat_sigval_t; 155 156 typedef struct compat_siginfo { 157 int si_signo; 158 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 159 int si_errno; 160 int si_code; 161 #else 162 int si_code; 163 int si_errno; 164 #endif 165 166 union { 167 int _pad[128/sizeof(int) - 3]; 168 169 /* kill() */ 170 struct { 171 compat_pid_t _pid; /* sender's pid */ 172 __compat_uid32_t _uid; /* sender's uid */ 173 } _kill; 174 175 /* POSIX.1b timers */ 176 struct { 177 compat_timer_t _tid; /* timer id */ 178 int _overrun; /* overrun count */ 179 compat_sigval_t _sigval; /* same as below */ 180 } _timer; 181 182 /* POSIX.1b signals */ 183 struct { 184 compat_pid_t _pid; /* sender's pid */ 185 __compat_uid32_t _uid; /* sender's uid */ 186 compat_sigval_t _sigval; 187 } _rt; 188 189 /* SIGCHLD */ 190 struct { 191 compat_pid_t _pid; /* which child */ 192 __compat_uid32_t _uid; /* sender's uid */ 193 int _status; /* exit code */ 194 compat_clock_t _utime; 195 compat_clock_t _stime; 196 } _sigchld; 197 198 #ifdef CONFIG_X86_X32_ABI 199 /* SIGCHLD (x32 version) */ 200 struct { 201 compat_pid_t _pid; /* which child */ 202 __compat_uid32_t _uid; /* sender's uid */ 203 int _status; /* exit code */ 204 compat_s64 _utime; 205 compat_s64 _stime; 206 } _sigchld_x32; 207 #endif 208 209 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */ 210 struct { 211 compat_uptr_t _addr; /* faulting insn/memory ref. */ 212 #ifdef __ARCH_SI_TRAPNO 213 int _trapno; /* TRAP # which caused the signal */ 214 #endif 215 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ 216 sizeof(short) : __alignof__(compat_uptr_t)) 217 union { 218 /* 219 * used when si_code=BUS_MCEERR_AR or 220 * used when si_code=BUS_MCEERR_AO 221 */ 222 short int _addr_lsb; /* Valid LSB of the reported address. */ 223 /* used when si_code=SEGV_BNDERR */ 224 struct { 225 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD]; 226 compat_uptr_t _lower; 227 compat_uptr_t _upper; 228 } _addr_bnd; 229 /* used when si_code=SEGV_PKUERR */ 230 struct { 231 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD]; 232 u32 _pkey; 233 } _addr_pkey; 234 }; 235 } _sigfault; 236 237 /* SIGPOLL */ 238 struct { 239 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 240 int _fd; 241 } _sigpoll; 242 243 struct { 244 compat_uptr_t _call_addr; /* calling user insn */ 245 int _syscall; /* triggering system call number */ 246 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 247 } _sigsys; 248 } _sifields; 249 } compat_siginfo_t; 250 251 struct compat_iovec { 252 compat_uptr_t iov_base; 253 compat_size_t iov_len; 254 }; 255 256 struct compat_rlimit { 257 compat_ulong_t rlim_cur; 258 compat_ulong_t rlim_max; 259 }; 260 261 struct compat_rusage { 262 struct old_timeval32 ru_utime; 263 struct old_timeval32 ru_stime; 264 compat_long_t ru_maxrss; 265 compat_long_t ru_ixrss; 266 compat_long_t ru_idrss; 267 compat_long_t ru_isrss; 268 compat_long_t ru_minflt; 269 compat_long_t ru_majflt; 270 compat_long_t ru_nswap; 271 compat_long_t ru_inblock; 272 compat_long_t ru_oublock; 273 compat_long_t ru_msgsnd; 274 compat_long_t ru_msgrcv; 275 compat_long_t ru_nsignals; 276 compat_long_t ru_nvcsw; 277 compat_long_t ru_nivcsw; 278 }; 279 280 extern int put_compat_rusage(const struct rusage *, 281 struct compat_rusage __user *); 282 283 struct compat_siginfo; 284 struct __compat_aio_sigset; 285 286 struct compat_dirent { 287 u32 d_ino; 288 compat_off_t d_off; 289 u16 d_reclen; 290 char d_name[256]; 291 }; 292 293 struct compat_ustat { 294 compat_daddr_t f_tfree; 295 compat_ino_t f_tinode; 296 char f_fname[6]; 297 char f_fpack[6]; 298 }; 299 300 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 301 302 typedef struct compat_sigevent { 303 compat_sigval_t sigev_value; 304 compat_int_t sigev_signo; 305 compat_int_t sigev_notify; 306 union { 307 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 308 compat_int_t _tid; 309 310 struct { 311 compat_uptr_t _function; 312 compat_uptr_t _attribute; 313 } _sigev_thread; 314 } _sigev_un; 315 } compat_sigevent_t; 316 317 struct compat_ifmap { 318 compat_ulong_t mem_start; 319 compat_ulong_t mem_end; 320 unsigned short base_addr; 321 unsigned char irq; 322 unsigned char dma; 323 unsigned char port; 324 }; 325 326 struct compat_if_settings { 327 unsigned int type; /* Type of physical device or protocol */ 328 unsigned int size; /* Size of the data allocated by the caller */ 329 compat_uptr_t ifs_ifsu; /* union of pointers */ 330 }; 331 332 struct compat_ifreq { 333 union { 334 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 335 } ifr_ifrn; 336 union { 337 struct sockaddr ifru_addr; 338 struct sockaddr ifru_dstaddr; 339 struct sockaddr ifru_broadaddr; 340 struct sockaddr ifru_netmask; 341 struct sockaddr ifru_hwaddr; 342 short ifru_flags; 343 compat_int_t ifru_ivalue; 344 compat_int_t ifru_mtu; 345 struct compat_ifmap ifru_map; 346 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 347 char ifru_newname[IFNAMSIZ]; 348 compat_caddr_t ifru_data; 349 struct compat_if_settings ifru_settings; 350 } ifr_ifru; 351 }; 352 353 struct compat_ifconf { 354 compat_int_t ifc_len; /* size of buffer */ 355 compat_caddr_t ifcbuf; 356 }; 357 358 struct compat_robust_list { 359 compat_uptr_t next; 360 }; 361 362 struct compat_robust_list_head { 363 struct compat_robust_list list; 364 compat_long_t futex_offset; 365 compat_uptr_t list_op_pending; 366 }; 367 368 #ifdef CONFIG_COMPAT_OLD_SIGACTION 369 struct compat_old_sigaction { 370 compat_uptr_t sa_handler; 371 compat_old_sigset_t sa_mask; 372 compat_ulong_t sa_flags; 373 compat_uptr_t sa_restorer; 374 }; 375 #endif 376 377 struct compat_keyctl_kdf_params { 378 compat_uptr_t hashname; 379 compat_uptr_t otherinfo; 380 __u32 otherinfolen; 381 __u32 __spare[8]; 382 }; 383 384 struct compat_statfs; 385 struct compat_statfs64; 386 struct compat_old_linux_dirent; 387 struct compat_linux_dirent; 388 struct linux_dirent64; 389 struct compat_msghdr; 390 struct compat_mmsghdr; 391 struct compat_sysinfo; 392 struct compat_sysctl_args; 393 struct compat_kexec_segment; 394 struct compat_mq_attr; 395 struct compat_msgbuf; 396 397 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 398 399 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 400 401 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 402 unsigned long bitmap_size); 403 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 404 unsigned long bitmap_size); 405 int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from); 406 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from); 407 int get_compat_sigevent(struct sigevent *event, 408 const struct compat_sigevent __user *u_event); 409 410 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 411 412 /* 413 * Defined inline such that size can be compile time constant, which avoids 414 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 415 */ 416 static inline int 417 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 418 unsigned int size) 419 { 420 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 421 #ifdef __BIG_ENDIAN 422 compat_sigset_t v; 423 switch (_NSIG_WORDS) { 424 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 425 /* fall through */ 426 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 427 /* fall through */ 428 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 429 /* fall through */ 430 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 431 } 432 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 433 #else 434 return copy_to_user(compat, set, size) ? -EFAULT : 0; 435 #endif 436 } 437 438 extern int compat_ptrace_request(struct task_struct *child, 439 compat_long_t request, 440 compat_ulong_t addr, compat_ulong_t data); 441 442 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 443 compat_ulong_t addr, compat_ulong_t data); 444 445 struct epoll_event; /* fortunately, this one is fixed-layout */ 446 447 extern ssize_t compat_rw_copy_check_uvector(int type, 448 const struct compat_iovec __user *uvector, 449 unsigned long nr_segs, 450 unsigned long fast_segs, struct iovec *fast_pointer, 451 struct iovec **ret_pointer); 452 453 extern void __user *compat_alloc_user_space(unsigned long len); 454 455 int compat_restore_altstack(const compat_stack_t __user *uss); 456 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 457 #define compat_save_altstack_ex(uss, sp) do { \ 458 compat_stack_t __user *__uss = uss; \ 459 struct task_struct *t = current; \ 460 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \ 461 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \ 462 put_user_ex(t->sas_ss_size, &__uss->ss_size); \ 463 if (t->sas_ss_flags & SS_AUTODISARM) \ 464 sas_ss_reset(t); \ 465 } while (0); 466 467 /* 468 * These syscall function prototypes are kept in the same order as 469 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 470 * go below. 471 * 472 * Please note that these prototypes here are only provided for information 473 * purposes, for static analysis, and for linking from the syscall table. 474 * These functions should not be called elsewhere from kernel code. 475 * 476 * As the syscall calling convention may be different from the default 477 * for architectures overriding the syscall calling convention, do not 478 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 479 */ 480 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 481 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 482 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 483 u32 __user *iocb); 484 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 485 compat_long_t min_nr, 486 compat_long_t nr, 487 struct io_event __user *events, 488 struct old_timespec32 __user *timeout, 489 const struct __compat_aio_sigset __user *usig); 490 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, 491 compat_long_t min_nr, 492 compat_long_t nr, 493 struct io_event __user *events, 494 struct __kernel_timespec __user *timeout, 495 const struct __compat_aio_sigset __user *usig); 496 497 /* fs/cookies.c */ 498 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 499 500 /* fs/eventpoll.c */ 501 asmlinkage long compat_sys_epoll_pwait(int epfd, 502 struct epoll_event __user *events, 503 int maxevents, int timeout, 504 const compat_sigset_t __user *sigmask, 505 compat_size_t sigsetsize); 506 507 /* fs/fcntl.c */ 508 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 509 compat_ulong_t arg); 510 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 511 compat_ulong_t arg); 512 513 /* fs/ioctl.c */ 514 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 515 compat_ulong_t arg); 516 517 /* fs/namespace.c */ 518 asmlinkage long compat_sys_mount(const char __user *dev_name, 519 const char __user *dir_name, 520 const char __user *type, compat_ulong_t flags, 521 const void __user *data); 522 523 /* fs/open.c */ 524 asmlinkage long compat_sys_statfs(const char __user *pathname, 525 struct compat_statfs __user *buf); 526 asmlinkage long compat_sys_statfs64(const char __user *pathname, 527 compat_size_t sz, 528 struct compat_statfs64 __user *buf); 529 asmlinkage long compat_sys_fstatfs(unsigned int fd, 530 struct compat_statfs __user *buf); 531 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 532 struct compat_statfs64 __user *buf); 533 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 534 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 535 /* No generic prototype for truncate64, ftruncate64, fallocate */ 536 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 537 int flags, umode_t mode); 538 539 /* fs/readdir.c */ 540 asmlinkage long compat_sys_getdents(unsigned int fd, 541 struct compat_linux_dirent __user *dirent, 542 unsigned int count); 543 544 /* fs/read_write.c */ 545 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 546 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd, 547 const struct compat_iovec __user *vec, compat_ulong_t vlen); 548 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd, 549 const struct compat_iovec __user *vec, compat_ulong_t vlen); 550 /* No generic prototype for pread64 and pwrite64 */ 551 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 552 const struct compat_iovec __user *vec, 553 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 554 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 555 const struct compat_iovec __user *vec, 556 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 557 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 558 asmlinkage long compat_sys_preadv64(unsigned long fd, 559 const struct compat_iovec __user *vec, 560 unsigned long vlen, loff_t pos); 561 #endif 562 563 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 564 asmlinkage long compat_sys_pwritev64(unsigned long fd, 565 const struct compat_iovec __user *vec, 566 unsigned long vlen, loff_t pos); 567 #endif 568 569 /* fs/sendfile.c */ 570 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 571 compat_off_t __user *offset, compat_size_t count); 572 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 573 compat_loff_t __user *offset, compat_size_t count); 574 575 /* fs/select.c */ 576 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, 577 compat_ulong_t __user *outp, 578 compat_ulong_t __user *exp, 579 struct old_timespec32 __user *tsp, 580 void __user *sig); 581 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, 582 compat_ulong_t __user *outp, 583 compat_ulong_t __user *exp, 584 struct __kernel_timespec __user *tsp, 585 void __user *sig); 586 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, 587 unsigned int nfds, 588 struct old_timespec32 __user *tsp, 589 const compat_sigset_t __user *sigmask, 590 compat_size_t sigsetsize); 591 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, 592 unsigned int nfds, 593 struct __kernel_timespec __user *tsp, 594 const compat_sigset_t __user *sigmask, 595 compat_size_t sigsetsize); 596 597 /* fs/signalfd.c */ 598 asmlinkage long compat_sys_signalfd4(int ufd, 599 const compat_sigset_t __user *sigmask, 600 compat_size_t sigsetsize, int flags); 601 602 /* fs/splice.c */ 603 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *, 604 unsigned int nr_segs, unsigned int flags); 605 606 /* fs/stat.c */ 607 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 608 const char __user *filename, 609 struct compat_stat __user *statbuf, 610 int flag); 611 asmlinkage long compat_sys_newfstat(unsigned int fd, 612 struct compat_stat __user *statbuf); 613 614 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 615 616 /* kernel/exit.c */ 617 asmlinkage long compat_sys_waitid(int, compat_pid_t, 618 struct compat_siginfo __user *, int, 619 struct compat_rusage __user *); 620 621 622 623 /* kernel/futex.c */ 624 asmlinkage long 625 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 626 compat_size_t len); 627 asmlinkage long 628 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 629 compat_size_t __user *len_ptr); 630 631 /* kernel/itimer.c */ 632 asmlinkage long compat_sys_getitimer(int which, 633 struct old_itimerval32 __user *it); 634 asmlinkage long compat_sys_setitimer(int which, 635 struct old_itimerval32 __user *in, 636 struct old_itimerval32 __user *out); 637 638 /* kernel/kexec.c */ 639 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 640 compat_ulong_t nr_segments, 641 struct compat_kexec_segment __user *, 642 compat_ulong_t flags); 643 644 /* kernel/posix-timers.c */ 645 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 646 struct compat_sigevent __user *timer_event_spec, 647 timer_t __user *created_timer_id); 648 649 /* kernel/ptrace.c */ 650 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 651 compat_long_t addr, compat_long_t data); 652 653 /* kernel/sched/core.c */ 654 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 655 unsigned int len, 656 compat_ulong_t __user *user_mask_ptr); 657 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 658 unsigned int len, 659 compat_ulong_t __user *user_mask_ptr); 660 661 /* kernel/signal.c */ 662 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 663 compat_stack_t __user *uoss_ptr); 664 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 665 compat_size_t sigsetsize); 666 #ifndef CONFIG_ODD_RT_SIGACTION 667 asmlinkage long compat_sys_rt_sigaction(int, 668 const struct compat_sigaction __user *, 669 struct compat_sigaction __user *, 670 compat_size_t); 671 #endif 672 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 673 compat_sigset_t __user *oset, 674 compat_size_t sigsetsize); 675 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 676 compat_size_t sigsetsize); 677 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, 678 struct compat_siginfo __user *uinfo, 679 struct old_timespec32 __user *uts, compat_size_t sigsetsize); 680 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, 681 struct compat_siginfo __user *uinfo, 682 struct __kernel_timespec __user *uts, compat_size_t sigsetsize); 683 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 684 struct compat_siginfo __user *uinfo); 685 /* No generic prototype for rt_sigreturn */ 686 687 /* kernel/sys.c */ 688 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 689 asmlinkage long compat_sys_getrlimit(unsigned int resource, 690 struct compat_rlimit __user *rlim); 691 asmlinkage long compat_sys_setrlimit(unsigned int resource, 692 struct compat_rlimit __user *rlim); 693 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 694 695 /* kernel/time.c */ 696 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, 697 struct timezone __user *tz); 698 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, 699 struct timezone __user *tz); 700 701 /* kernel/timer.c */ 702 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 703 704 /* ipc/mqueue.c */ 705 asmlinkage long compat_sys_mq_open(const char __user *u_name, 706 int oflag, compat_mode_t mode, 707 struct compat_mq_attr __user *u_attr); 708 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 709 const struct compat_sigevent __user *u_notification); 710 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 711 const struct compat_mq_attr __user *u_mqstat, 712 struct compat_mq_attr __user *u_omqstat); 713 714 /* ipc/msg.c */ 715 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 716 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 717 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 718 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 719 compat_ssize_t msgsz, int msgflg); 720 721 /* ipc/sem.c */ 722 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 723 724 /* ipc/shm.c */ 725 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 726 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 727 728 /* net/socket.c */ 729 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 730 unsigned flags, struct sockaddr __user *addr, 731 int __user *addrlen); 732 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 733 char __user *optval, unsigned int optlen); 734 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 735 char __user *optval, int __user *optlen); 736 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 737 unsigned flags); 738 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 739 unsigned int flags); 740 741 /* mm/filemap.c: No generic prototype for readahead */ 742 743 /* security/keys/keyctl.c */ 744 asmlinkage long compat_sys_keyctl(u32 option, 745 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 746 747 /* arch/example/kernel/sys_example.c */ 748 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 749 const compat_uptr_t __user *envp); 750 751 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 752 753 /* mm/, CONFIG_MMU only */ 754 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 755 compat_ulong_t mode, 756 compat_ulong_t __user *nmask, 757 compat_ulong_t maxnode, compat_ulong_t flags); 758 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 759 compat_ulong_t __user *nmask, 760 compat_ulong_t maxnode, 761 compat_ulong_t addr, 762 compat_ulong_t flags); 763 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 764 compat_ulong_t maxnode); 765 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 766 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 767 const compat_ulong_t __user *new_nodes); 768 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 769 __u32 __user *pages, 770 const int __user *nodes, 771 int __user *status, 772 int flags); 773 774 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 775 compat_pid_t pid, int sig, 776 struct compat_siginfo __user *uinfo); 777 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, 778 unsigned vlen, unsigned int flags, 779 struct __kernel_timespec __user *timeout); 780 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, 781 unsigned vlen, unsigned int flags, 782 struct old_timespec32 __user *timeout); 783 asmlinkage long compat_sys_wait4(compat_pid_t pid, 784 compat_uint_t __user *stat_addr, int options, 785 struct compat_rusage __user *ru); 786 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 787 int, const char __user *); 788 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 789 struct file_handle __user *handle, 790 int flags); 791 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 792 unsigned vlen, unsigned int flags); 793 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid, 794 const struct compat_iovec __user *lvec, 795 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 796 compat_ulong_t riovcnt, compat_ulong_t flags); 797 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid, 798 const struct compat_iovec __user *lvec, 799 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec, 800 compat_ulong_t riovcnt, compat_ulong_t flags); 801 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 802 const compat_uptr_t __user *argv, 803 const compat_uptr_t __user *envp, int flags); 804 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 805 const struct compat_iovec __user *vec, 806 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 807 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 808 const struct compat_iovec __user *vec, 809 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 810 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 811 asmlinkage long compat_sys_readv64v2(unsigned long fd, 812 const struct compat_iovec __user *vec, 813 unsigned long vlen, loff_t pos, rwf_t flags); 814 #endif 815 816 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 817 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 818 const struct compat_iovec __user *vec, 819 unsigned long vlen, loff_t pos, rwf_t flags); 820 #endif 821 822 823 /* 824 * Deprecated system calls which are still defined in 825 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 826 */ 827 828 /* __ARCH_WANT_SYSCALL_NO_AT */ 829 asmlinkage long compat_sys_open(const char __user *filename, int flags, 830 umode_t mode); 831 832 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 833 asmlinkage long compat_sys_signalfd(int ufd, 834 const compat_sigset_t __user *sigmask, 835 compat_size_t sigsetsize); 836 837 /* __ARCH_WANT_SYSCALL_OFF_T */ 838 asmlinkage long compat_sys_newstat(const char __user *filename, 839 struct compat_stat __user *statbuf); 840 asmlinkage long compat_sys_newlstat(const char __user *filename, 841 struct compat_stat __user *statbuf); 842 843 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 844 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 845 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 846 struct old_timeval32 __user *tvp); 847 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 848 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 849 unsigned flags); 850 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args); 851 852 /* obsolete: fs/readdir.c */ 853 asmlinkage long compat_sys_old_readdir(unsigned int fd, 854 struct compat_old_linux_dirent __user *, 855 unsigned int count); 856 857 /* obsolete: fs/select.c */ 858 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 859 860 /* obsolete: ipc */ 861 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 862 863 /* obsolete: kernel/signal.c */ 864 #ifdef __ARCH_WANT_SYS_SIGPENDING 865 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 866 #endif 867 868 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 869 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 870 compat_old_sigset_t __user *oset); 871 #endif 872 #ifdef CONFIG_COMPAT_OLD_SIGACTION 873 asmlinkage long compat_sys_sigaction(int sig, 874 const struct compat_old_sigaction __user *act, 875 struct compat_old_sigaction __user *oact); 876 #endif 877 878 /* obsolete: net/socket.c */ 879 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 880 881 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 882 883 884 /* 885 * For most but not all architectures, "am I in a compat syscall?" and 886 * "am I a compat task?" are the same question. For architectures on which 887 * they aren't the same question, arch code can override in_compat_syscall. 888 */ 889 890 #ifndef in_compat_syscall 891 static inline bool in_compat_syscall(void) { return is_compat_task(); } 892 #endif 893 894 /** 895 * ns_to_old_timeval32 - Compat version of ns_to_timeval 896 * @nsec: the nanoseconds value to be converted 897 * 898 * Returns the old_timeval32 representation of the nsec parameter. 899 */ 900 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 901 { 902 struct __kernel_old_timeval tv; 903 struct old_timeval32 ctv; 904 905 tv = ns_to_kernel_old_timeval(nsec); 906 ctv.tv_sec = tv.tv_sec; 907 ctv.tv_usec = tv.tv_usec; 908 909 return ctv; 910 } 911 912 /* 913 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) 914 * directly. Instead, use one of the functions which work equivalently, such 915 * as the kcompat_sys_xyzyyz() functions prototyped below. 916 */ 917 918 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, 919 struct compat_statfs64 __user * buf); 920 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 921 struct compat_statfs64 __user * buf); 922 923 #else /* !CONFIG_COMPAT */ 924 925 #define is_compat_task() (0) 926 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ 927 #define in_compat_syscall in_compat_syscall 928 static inline bool in_compat_syscall(void) { return false; } 929 930 #endif /* CONFIG_COMPAT */ 931 932 /* 933 * A pointer passed in from user mode. This should not 934 * be used for syscall parameters, just declare them 935 * as pointers because the syscall entry code will have 936 * appropriately converted them already. 937 */ 938 #ifndef compat_ptr 939 static inline void __user *compat_ptr(compat_uptr_t uptr) 940 { 941 return (void __user *)(unsigned long)uptr; 942 } 943 #endif 944 945 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 946 { 947 return (u32)(unsigned long)uptr; 948 } 949 950 #endif /* _LINUX_COMPAT_H */ 951