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 struct compat_iovec { 95 compat_uptr_t iov_base; 96 compat_size_t iov_len; 97 }; 98 99 #ifdef CONFIG_COMPAT 100 101 #ifndef compat_user_stack_pointer 102 #define compat_user_stack_pointer() current_user_stack_pointer() 103 #endif 104 #ifndef compat_sigaltstack /* we'll need that for MIPS */ 105 typedef struct compat_sigaltstack { 106 compat_uptr_t ss_sp; 107 int ss_flags; 108 compat_size_t ss_size; 109 } compat_stack_t; 110 #endif 111 #ifndef COMPAT_MINSIGSTKSZ 112 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ 113 #endif 114 115 #define compat_jiffies_to_clock_t(x) \ 116 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) 117 118 typedef __compat_uid32_t compat_uid_t; 119 typedef __compat_gid32_t compat_gid_t; 120 121 struct compat_sel_arg_struct; 122 struct rusage; 123 124 struct old_itimerval32; 125 126 struct compat_tms { 127 compat_clock_t tms_utime; 128 compat_clock_t tms_stime; 129 compat_clock_t tms_cutime; 130 compat_clock_t tms_cstime; 131 }; 132 133 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) 134 135 typedef struct { 136 compat_sigset_word sig[_COMPAT_NSIG_WORDS]; 137 } compat_sigset_t; 138 139 int set_compat_user_sigmask(const compat_sigset_t __user *umask, 140 size_t sigsetsize); 141 142 struct compat_sigaction { 143 #ifndef __ARCH_HAS_IRIX_SIGACTION 144 compat_uptr_t sa_handler; 145 compat_ulong_t sa_flags; 146 #else 147 compat_uint_t sa_flags; 148 compat_uptr_t sa_handler; 149 #endif 150 #ifdef __ARCH_HAS_SA_RESTORER 151 compat_uptr_t sa_restorer; 152 #endif 153 compat_sigset_t sa_mask __packed; 154 }; 155 156 typedef union compat_sigval { 157 compat_int_t sival_int; 158 compat_uptr_t sival_ptr; 159 } compat_sigval_t; 160 161 typedef struct compat_siginfo { 162 int si_signo; 163 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 164 int si_errno; 165 int si_code; 166 #else 167 int si_code; 168 int si_errno; 169 #endif 170 171 union { 172 int _pad[128/sizeof(int) - 3]; 173 174 /* kill() */ 175 struct { 176 compat_pid_t _pid; /* sender's pid */ 177 __compat_uid32_t _uid; /* sender's uid */ 178 } _kill; 179 180 /* POSIX.1b timers */ 181 struct { 182 compat_timer_t _tid; /* timer id */ 183 int _overrun; /* overrun count */ 184 compat_sigval_t _sigval; /* same as below */ 185 } _timer; 186 187 /* POSIX.1b signals */ 188 struct { 189 compat_pid_t _pid; /* sender's pid */ 190 __compat_uid32_t _uid; /* sender's uid */ 191 compat_sigval_t _sigval; 192 } _rt; 193 194 /* SIGCHLD */ 195 struct { 196 compat_pid_t _pid; /* which child */ 197 __compat_uid32_t _uid; /* sender's uid */ 198 int _status; /* exit code */ 199 compat_clock_t _utime; 200 compat_clock_t _stime; 201 } _sigchld; 202 203 #ifdef CONFIG_X86_X32_ABI 204 /* SIGCHLD (x32 version) */ 205 struct { 206 compat_pid_t _pid; /* which child */ 207 __compat_uid32_t _uid; /* sender's uid */ 208 int _status; /* exit code */ 209 compat_s64 _utime; 210 compat_s64 _stime; 211 } _sigchld_x32; 212 #endif 213 214 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */ 215 struct { 216 compat_uptr_t _addr; /* faulting insn/memory ref. */ 217 #ifdef __ARCH_SI_TRAPNO 218 int _trapno; /* TRAP # which caused the signal */ 219 #endif 220 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ 221 sizeof(short) : __alignof__(compat_uptr_t)) 222 union { 223 /* 224 * used when si_code=BUS_MCEERR_AR or 225 * used when si_code=BUS_MCEERR_AO 226 */ 227 short int _addr_lsb; /* Valid LSB of the reported address. */ 228 /* used when si_code=SEGV_BNDERR */ 229 struct { 230 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD]; 231 compat_uptr_t _lower; 232 compat_uptr_t _upper; 233 } _addr_bnd; 234 /* used when si_code=SEGV_PKUERR */ 235 struct { 236 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD]; 237 u32 _pkey; 238 } _addr_pkey; 239 }; 240 } _sigfault; 241 242 /* SIGPOLL */ 243 struct { 244 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 245 int _fd; 246 } _sigpoll; 247 248 struct { 249 compat_uptr_t _call_addr; /* calling user insn */ 250 int _syscall; /* triggering system call number */ 251 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 252 } _sigsys; 253 } _sifields; 254 } compat_siginfo_t; 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 void copy_siginfo_to_external32(struct compat_siginfo *to, 406 const struct kernel_siginfo *from); 407 int copy_siginfo_from_user32(kernel_siginfo_t *to, 408 const struct compat_siginfo __user *from); 409 int __copy_siginfo_to_user32(struct compat_siginfo __user *to, 410 const kernel_siginfo_t *from); 411 #ifndef copy_siginfo_to_user32 412 #define copy_siginfo_to_user32 __copy_siginfo_to_user32 413 #endif 414 int get_compat_sigevent(struct sigevent *event, 415 const struct compat_sigevent __user *u_event); 416 417 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 418 419 /* 420 * Defined inline such that size can be compile time constant, which avoids 421 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 422 */ 423 static inline int 424 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 425 unsigned int size) 426 { 427 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 428 #ifdef __BIG_ENDIAN 429 compat_sigset_t v; 430 switch (_NSIG_WORDS) { 431 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 432 fallthrough; 433 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 434 fallthrough; 435 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 436 fallthrough; 437 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 438 } 439 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 440 #else 441 return copy_to_user(compat, set, size) ? -EFAULT : 0; 442 #endif 443 } 444 445 #ifdef CONFIG_CPU_BIG_ENDIAN 446 #define unsafe_put_compat_sigset(compat, set, label) do { \ 447 compat_sigset_t __user *__c = compat; \ 448 const sigset_t *__s = set; \ 449 \ 450 switch (_NSIG_WORDS) { \ 451 case 4: \ 452 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \ 453 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \ 454 fallthrough; \ 455 case 3: \ 456 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \ 457 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \ 458 fallthrough; \ 459 case 2: \ 460 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \ 461 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \ 462 fallthrough; \ 463 case 1: \ 464 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \ 465 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \ 466 } \ 467 } while (0) 468 #else 469 #define unsafe_put_compat_sigset(compat, set, label) do { \ 470 compat_sigset_t __user *__c = compat; \ 471 const sigset_t *__s = set; \ 472 \ 473 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \ 474 } while (0) 475 #endif 476 477 extern int compat_ptrace_request(struct task_struct *child, 478 compat_long_t request, 479 compat_ulong_t addr, compat_ulong_t data); 480 481 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 482 compat_ulong_t addr, compat_ulong_t data); 483 484 struct epoll_event; /* fortunately, this one is fixed-layout */ 485 486 extern void __user *compat_alloc_user_space(unsigned long len); 487 488 int compat_restore_altstack(const compat_stack_t __user *uss); 489 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 490 #define unsafe_compat_save_altstack(uss, sp, label) do { \ 491 compat_stack_t __user *__uss = uss; \ 492 struct task_struct *t = current; \ 493 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \ 494 &__uss->ss_sp, label); \ 495 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \ 496 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \ 497 if (t->sas_ss_flags & SS_AUTODISARM) \ 498 sas_ss_reset(t); \ 499 } while (0); 500 501 /* 502 * These syscall function prototypes are kept in the same order as 503 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 504 * go below. 505 * 506 * Please note that these prototypes here are only provided for information 507 * purposes, for static analysis, and for linking from the syscall table. 508 * These functions should not be called elsewhere from kernel code. 509 * 510 * As the syscall calling convention may be different from the default 511 * for architectures overriding the syscall calling convention, do not 512 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 513 */ 514 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 515 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 516 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 517 u32 __user *iocb); 518 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 519 compat_long_t min_nr, 520 compat_long_t nr, 521 struct io_event __user *events, 522 struct old_timespec32 __user *timeout, 523 const struct __compat_aio_sigset __user *usig); 524 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, 525 compat_long_t min_nr, 526 compat_long_t nr, 527 struct io_event __user *events, 528 struct __kernel_timespec __user *timeout, 529 const struct __compat_aio_sigset __user *usig); 530 531 /* fs/cookies.c */ 532 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 533 534 /* fs/eventpoll.c */ 535 asmlinkage long compat_sys_epoll_pwait(int epfd, 536 struct epoll_event __user *events, 537 int maxevents, int timeout, 538 const compat_sigset_t __user *sigmask, 539 compat_size_t sigsetsize); 540 asmlinkage long compat_sys_epoll_pwait2(int epfd, 541 struct epoll_event __user *events, 542 int maxevents, 543 const struct __kernel_timespec __user *timeout, 544 const compat_sigset_t __user *sigmask, 545 compat_size_t sigsetsize); 546 547 /* fs/fcntl.c */ 548 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 549 compat_ulong_t arg); 550 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 551 compat_ulong_t arg); 552 553 /* fs/ioctl.c */ 554 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 555 compat_ulong_t arg); 556 557 /* fs/open.c */ 558 asmlinkage long compat_sys_statfs(const char __user *pathname, 559 struct compat_statfs __user *buf); 560 asmlinkage long compat_sys_statfs64(const char __user *pathname, 561 compat_size_t sz, 562 struct compat_statfs64 __user *buf); 563 asmlinkage long compat_sys_fstatfs(unsigned int fd, 564 struct compat_statfs __user *buf); 565 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 566 struct compat_statfs64 __user *buf); 567 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 568 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 569 /* No generic prototype for truncate64, ftruncate64, fallocate */ 570 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 571 int flags, umode_t mode); 572 573 /* fs/readdir.c */ 574 asmlinkage long compat_sys_getdents(unsigned int fd, 575 struct compat_linux_dirent __user *dirent, 576 unsigned int count); 577 578 /* fs/read_write.c */ 579 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 580 /* No generic prototype for pread64 and pwrite64 */ 581 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 582 const struct iovec __user *vec, 583 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 584 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 585 const struct iovec __user *vec, 586 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 587 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 588 asmlinkage long compat_sys_preadv64(unsigned long fd, 589 const struct iovec __user *vec, 590 unsigned long vlen, loff_t pos); 591 #endif 592 593 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 594 asmlinkage long compat_sys_pwritev64(unsigned long fd, 595 const struct iovec __user *vec, 596 unsigned long vlen, loff_t pos); 597 #endif 598 599 /* fs/sendfile.c */ 600 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 601 compat_off_t __user *offset, compat_size_t count); 602 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 603 compat_loff_t __user *offset, compat_size_t count); 604 605 /* fs/select.c */ 606 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, 607 compat_ulong_t __user *outp, 608 compat_ulong_t __user *exp, 609 struct old_timespec32 __user *tsp, 610 void __user *sig); 611 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, 612 compat_ulong_t __user *outp, 613 compat_ulong_t __user *exp, 614 struct __kernel_timespec __user *tsp, 615 void __user *sig); 616 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, 617 unsigned int nfds, 618 struct old_timespec32 __user *tsp, 619 const compat_sigset_t __user *sigmask, 620 compat_size_t sigsetsize); 621 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, 622 unsigned int nfds, 623 struct __kernel_timespec __user *tsp, 624 const compat_sigset_t __user *sigmask, 625 compat_size_t sigsetsize); 626 627 /* fs/signalfd.c */ 628 asmlinkage long compat_sys_signalfd4(int ufd, 629 const compat_sigset_t __user *sigmask, 630 compat_size_t sigsetsize, int flags); 631 632 /* fs/stat.c */ 633 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 634 const char __user *filename, 635 struct compat_stat __user *statbuf, 636 int flag); 637 asmlinkage long compat_sys_newfstat(unsigned int fd, 638 struct compat_stat __user *statbuf); 639 640 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 641 642 /* kernel/exit.c */ 643 asmlinkage long compat_sys_waitid(int, compat_pid_t, 644 struct compat_siginfo __user *, int, 645 struct compat_rusage __user *); 646 647 648 649 /* kernel/futex.c */ 650 asmlinkage long 651 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 652 compat_size_t len); 653 asmlinkage long 654 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 655 compat_size_t __user *len_ptr); 656 657 /* kernel/itimer.c */ 658 asmlinkage long compat_sys_getitimer(int which, 659 struct old_itimerval32 __user *it); 660 asmlinkage long compat_sys_setitimer(int which, 661 struct old_itimerval32 __user *in, 662 struct old_itimerval32 __user *out); 663 664 /* kernel/kexec.c */ 665 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 666 compat_ulong_t nr_segments, 667 struct compat_kexec_segment __user *, 668 compat_ulong_t flags); 669 670 /* kernel/posix-timers.c */ 671 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 672 struct compat_sigevent __user *timer_event_spec, 673 timer_t __user *created_timer_id); 674 675 /* kernel/ptrace.c */ 676 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 677 compat_long_t addr, compat_long_t data); 678 679 /* kernel/sched/core.c */ 680 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 681 unsigned int len, 682 compat_ulong_t __user *user_mask_ptr); 683 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 684 unsigned int len, 685 compat_ulong_t __user *user_mask_ptr); 686 687 /* kernel/signal.c */ 688 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 689 compat_stack_t __user *uoss_ptr); 690 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 691 compat_size_t sigsetsize); 692 #ifndef CONFIG_ODD_RT_SIGACTION 693 asmlinkage long compat_sys_rt_sigaction(int, 694 const struct compat_sigaction __user *, 695 struct compat_sigaction __user *, 696 compat_size_t); 697 #endif 698 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 699 compat_sigset_t __user *oset, 700 compat_size_t sigsetsize); 701 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 702 compat_size_t sigsetsize); 703 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, 704 struct compat_siginfo __user *uinfo, 705 struct old_timespec32 __user *uts, compat_size_t sigsetsize); 706 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, 707 struct compat_siginfo __user *uinfo, 708 struct __kernel_timespec __user *uts, compat_size_t sigsetsize); 709 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 710 struct compat_siginfo __user *uinfo); 711 /* No generic prototype for rt_sigreturn */ 712 713 /* kernel/sys.c */ 714 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 715 asmlinkage long compat_sys_getrlimit(unsigned int resource, 716 struct compat_rlimit __user *rlim); 717 asmlinkage long compat_sys_setrlimit(unsigned int resource, 718 struct compat_rlimit __user *rlim); 719 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 720 721 /* kernel/time.c */ 722 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, 723 struct timezone __user *tz); 724 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, 725 struct timezone __user *tz); 726 727 /* kernel/timer.c */ 728 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 729 730 /* ipc/mqueue.c */ 731 asmlinkage long compat_sys_mq_open(const char __user *u_name, 732 int oflag, compat_mode_t mode, 733 struct compat_mq_attr __user *u_attr); 734 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 735 const struct compat_sigevent __user *u_notification); 736 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 737 const struct compat_mq_attr __user *u_mqstat, 738 struct compat_mq_attr __user *u_omqstat); 739 740 /* ipc/msg.c */ 741 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 742 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 743 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 744 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 745 compat_ssize_t msgsz, int msgflg); 746 747 /* ipc/sem.c */ 748 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 749 750 /* ipc/shm.c */ 751 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 752 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 753 754 /* net/socket.c */ 755 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 756 unsigned flags, struct sockaddr __user *addr, 757 int __user *addrlen); 758 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 759 unsigned flags); 760 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 761 unsigned int flags); 762 763 /* mm/filemap.c: No generic prototype for readahead */ 764 765 /* security/keys/keyctl.c */ 766 asmlinkage long compat_sys_keyctl(u32 option, 767 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 768 769 /* arch/example/kernel/sys_example.c */ 770 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 771 const compat_uptr_t __user *envp); 772 773 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 774 775 /* mm/, CONFIG_MMU only */ 776 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 777 compat_ulong_t mode, 778 compat_ulong_t __user *nmask, 779 compat_ulong_t maxnode, compat_ulong_t flags); 780 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 781 compat_ulong_t __user *nmask, 782 compat_ulong_t maxnode, 783 compat_ulong_t addr, 784 compat_ulong_t flags); 785 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 786 compat_ulong_t maxnode); 787 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 788 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 789 const compat_ulong_t __user *new_nodes); 790 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 791 __u32 __user *pages, 792 const int __user *nodes, 793 int __user *status, 794 int flags); 795 796 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 797 compat_pid_t pid, int sig, 798 struct compat_siginfo __user *uinfo); 799 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, 800 unsigned vlen, unsigned int flags, 801 struct __kernel_timespec __user *timeout); 802 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, 803 unsigned vlen, unsigned int flags, 804 struct old_timespec32 __user *timeout); 805 asmlinkage long compat_sys_wait4(compat_pid_t pid, 806 compat_uint_t __user *stat_addr, int options, 807 struct compat_rusage __user *ru); 808 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 809 int, const char __user *); 810 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 811 struct file_handle __user *handle, 812 int flags); 813 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 814 unsigned vlen, unsigned int flags); 815 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 816 const compat_uptr_t __user *argv, 817 const compat_uptr_t __user *envp, int flags); 818 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 819 const struct iovec __user *vec, 820 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 821 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 822 const struct iovec __user *vec, 823 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 824 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 825 asmlinkage long compat_sys_preadv64v2(unsigned long fd, 826 const struct iovec __user *vec, 827 unsigned long vlen, loff_t pos, rwf_t flags); 828 #endif 829 830 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 831 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 832 const struct iovec __user *vec, 833 unsigned long vlen, loff_t pos, rwf_t flags); 834 #endif 835 836 837 /* 838 * Deprecated system calls which are still defined in 839 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 840 */ 841 842 /* __ARCH_WANT_SYSCALL_NO_AT */ 843 asmlinkage long compat_sys_open(const char __user *filename, int flags, 844 umode_t mode); 845 846 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 847 asmlinkage long compat_sys_signalfd(int ufd, 848 const compat_sigset_t __user *sigmask, 849 compat_size_t sigsetsize); 850 851 /* __ARCH_WANT_SYSCALL_OFF_T */ 852 asmlinkage long compat_sys_newstat(const char __user *filename, 853 struct compat_stat __user *statbuf); 854 asmlinkage long compat_sys_newlstat(const char __user *filename, 855 struct compat_stat __user *statbuf); 856 857 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 858 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 859 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 860 struct old_timeval32 __user *tvp); 861 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 862 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 863 unsigned flags); 864 865 /* obsolete: fs/readdir.c */ 866 asmlinkage long compat_sys_old_readdir(unsigned int fd, 867 struct compat_old_linux_dirent __user *, 868 unsigned int count); 869 870 /* obsolete: fs/select.c */ 871 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 872 873 /* obsolete: ipc */ 874 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 875 876 /* obsolete: kernel/signal.c */ 877 #ifdef __ARCH_WANT_SYS_SIGPENDING 878 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 879 #endif 880 881 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 882 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 883 compat_old_sigset_t __user *oset); 884 #endif 885 #ifdef CONFIG_COMPAT_OLD_SIGACTION 886 asmlinkage long compat_sys_sigaction(int sig, 887 const struct compat_old_sigaction __user *act, 888 struct compat_old_sigaction __user *oact); 889 #endif 890 891 /* obsolete: net/socket.c */ 892 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 893 894 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 895 896 897 /* 898 * For most but not all architectures, "am I in a compat syscall?" and 899 * "am I a compat task?" are the same question. For architectures on which 900 * they aren't the same question, arch code can override in_compat_syscall. 901 */ 902 903 #ifndef in_compat_syscall 904 static inline bool in_compat_syscall(void) { return is_compat_task(); } 905 #endif 906 907 /** 908 * ns_to_old_timeval32 - Compat version of ns_to_timeval 909 * @nsec: the nanoseconds value to be converted 910 * 911 * Returns the old_timeval32 representation of the nsec parameter. 912 */ 913 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 914 { 915 struct __kernel_old_timeval tv; 916 struct old_timeval32 ctv; 917 918 tv = ns_to_kernel_old_timeval(nsec); 919 ctv.tv_sec = tv.tv_sec; 920 ctv.tv_usec = tv.tv_usec; 921 922 return ctv; 923 } 924 925 /* 926 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) 927 * directly. Instead, use one of the functions which work equivalently, such 928 * as the kcompat_sys_xyzyyz() functions prototyped below. 929 */ 930 931 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, 932 struct compat_statfs64 __user * buf); 933 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 934 struct compat_statfs64 __user * buf); 935 936 #else /* !CONFIG_COMPAT */ 937 938 #define is_compat_task() (0) 939 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ 940 #define in_compat_syscall in_compat_syscall 941 static inline bool in_compat_syscall(void) { return false; } 942 943 #endif /* CONFIG_COMPAT */ 944 945 /* 946 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit 947 * types, and will need special compat treatment for that. Most architectures 948 * don't need that special handling even for compat syscalls. 949 */ 950 #ifndef compat_need_64bit_alignment_fixup 951 #define compat_need_64bit_alignment_fixup() false 952 #endif 953 954 /* 955 * A pointer passed in from user mode. This should not 956 * be used for syscall parameters, just declare them 957 * as pointers because the syscall entry code will have 958 * appropriately converted them already. 959 */ 960 #ifndef compat_ptr 961 static inline void __user *compat_ptr(compat_uptr_t uptr) 962 { 963 return (void __user *)(unsigned long)uptr; 964 } 965 #endif 966 967 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 968 { 969 return (u32)(unsigned long)uptr; 970 } 971 972 #endif /* _LINUX_COMPAT_H */ 973