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 /* used when si_code=TRAP_PERF */ 240 compat_ulong_t _perf; 241 }; 242 } _sigfault; 243 244 /* SIGPOLL */ 245 struct { 246 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 247 int _fd; 248 } _sigpoll; 249 250 struct { 251 compat_uptr_t _call_addr; /* calling user insn */ 252 int _syscall; /* triggering system call number */ 253 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 254 } _sigsys; 255 } _sifields; 256 } compat_siginfo_t; 257 258 struct compat_rlimit { 259 compat_ulong_t rlim_cur; 260 compat_ulong_t rlim_max; 261 }; 262 263 struct compat_rusage { 264 struct old_timeval32 ru_utime; 265 struct old_timeval32 ru_stime; 266 compat_long_t ru_maxrss; 267 compat_long_t ru_ixrss; 268 compat_long_t ru_idrss; 269 compat_long_t ru_isrss; 270 compat_long_t ru_minflt; 271 compat_long_t ru_majflt; 272 compat_long_t ru_nswap; 273 compat_long_t ru_inblock; 274 compat_long_t ru_oublock; 275 compat_long_t ru_msgsnd; 276 compat_long_t ru_msgrcv; 277 compat_long_t ru_nsignals; 278 compat_long_t ru_nvcsw; 279 compat_long_t ru_nivcsw; 280 }; 281 282 extern int put_compat_rusage(const struct rusage *, 283 struct compat_rusage __user *); 284 285 struct compat_siginfo; 286 struct __compat_aio_sigset; 287 288 struct compat_dirent { 289 u32 d_ino; 290 compat_off_t d_off; 291 u16 d_reclen; 292 char d_name[256]; 293 }; 294 295 struct compat_ustat { 296 compat_daddr_t f_tfree; 297 compat_ino_t f_tinode; 298 char f_fname[6]; 299 char f_fpack[6]; 300 }; 301 302 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 303 304 typedef struct compat_sigevent { 305 compat_sigval_t sigev_value; 306 compat_int_t sigev_signo; 307 compat_int_t sigev_notify; 308 union { 309 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 310 compat_int_t _tid; 311 312 struct { 313 compat_uptr_t _function; 314 compat_uptr_t _attribute; 315 } _sigev_thread; 316 } _sigev_un; 317 } compat_sigevent_t; 318 319 struct compat_ifmap { 320 compat_ulong_t mem_start; 321 compat_ulong_t mem_end; 322 unsigned short base_addr; 323 unsigned char irq; 324 unsigned char dma; 325 unsigned char port; 326 }; 327 328 struct compat_if_settings { 329 unsigned int type; /* Type of physical device or protocol */ 330 unsigned int size; /* Size of the data allocated by the caller */ 331 compat_uptr_t ifs_ifsu; /* union of pointers */ 332 }; 333 334 struct compat_ifreq { 335 union { 336 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 337 } ifr_ifrn; 338 union { 339 struct sockaddr ifru_addr; 340 struct sockaddr ifru_dstaddr; 341 struct sockaddr ifru_broadaddr; 342 struct sockaddr ifru_netmask; 343 struct sockaddr ifru_hwaddr; 344 short ifru_flags; 345 compat_int_t ifru_ivalue; 346 compat_int_t ifru_mtu; 347 struct compat_ifmap ifru_map; 348 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 349 char ifru_newname[IFNAMSIZ]; 350 compat_caddr_t ifru_data; 351 struct compat_if_settings ifru_settings; 352 } ifr_ifru; 353 }; 354 355 struct compat_ifconf { 356 compat_int_t ifc_len; /* size of buffer */ 357 compat_caddr_t ifcbuf; 358 }; 359 360 struct compat_robust_list { 361 compat_uptr_t next; 362 }; 363 364 struct compat_robust_list_head { 365 struct compat_robust_list list; 366 compat_long_t futex_offset; 367 compat_uptr_t list_op_pending; 368 }; 369 370 #ifdef CONFIG_COMPAT_OLD_SIGACTION 371 struct compat_old_sigaction { 372 compat_uptr_t sa_handler; 373 compat_old_sigset_t sa_mask; 374 compat_ulong_t sa_flags; 375 compat_uptr_t sa_restorer; 376 }; 377 #endif 378 379 struct compat_keyctl_kdf_params { 380 compat_uptr_t hashname; 381 compat_uptr_t otherinfo; 382 __u32 otherinfolen; 383 __u32 __spare[8]; 384 }; 385 386 struct compat_statfs; 387 struct compat_statfs64; 388 struct compat_old_linux_dirent; 389 struct compat_linux_dirent; 390 struct linux_dirent64; 391 struct compat_msghdr; 392 struct compat_mmsghdr; 393 struct compat_sysinfo; 394 struct compat_sysctl_args; 395 struct compat_kexec_segment; 396 struct compat_mq_attr; 397 struct compat_msgbuf; 398 399 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 400 401 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 402 403 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 404 unsigned long bitmap_size); 405 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 406 unsigned long bitmap_size); 407 void copy_siginfo_to_external32(struct compat_siginfo *to, 408 const struct kernel_siginfo *from); 409 int copy_siginfo_from_user32(kernel_siginfo_t *to, 410 const struct compat_siginfo __user *from); 411 int __copy_siginfo_to_user32(struct compat_siginfo __user *to, 412 const kernel_siginfo_t *from); 413 #ifndef copy_siginfo_to_user32 414 #define copy_siginfo_to_user32 __copy_siginfo_to_user32 415 #endif 416 int get_compat_sigevent(struct sigevent *event, 417 const struct compat_sigevent __user *u_event); 418 419 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 420 421 /* 422 * Defined inline such that size can be compile time constant, which avoids 423 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 424 */ 425 static inline int 426 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 427 unsigned int size) 428 { 429 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 430 #ifdef __BIG_ENDIAN 431 compat_sigset_t v; 432 switch (_NSIG_WORDS) { 433 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 434 fallthrough; 435 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 436 fallthrough; 437 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 438 fallthrough; 439 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 440 } 441 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 442 #else 443 return copy_to_user(compat, set, size) ? -EFAULT : 0; 444 #endif 445 } 446 447 #ifdef CONFIG_CPU_BIG_ENDIAN 448 #define unsafe_put_compat_sigset(compat, set, label) do { \ 449 compat_sigset_t __user *__c = compat; \ 450 const sigset_t *__s = set; \ 451 \ 452 switch (_NSIG_WORDS) { \ 453 case 4: \ 454 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \ 455 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \ 456 fallthrough; \ 457 case 3: \ 458 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \ 459 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \ 460 fallthrough; \ 461 case 2: \ 462 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \ 463 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \ 464 fallthrough; \ 465 case 1: \ 466 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \ 467 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \ 468 } \ 469 } while (0) 470 #else 471 #define unsafe_put_compat_sigset(compat, set, label) do { \ 472 compat_sigset_t __user *__c = compat; \ 473 const sigset_t *__s = set; \ 474 \ 475 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \ 476 } while (0) 477 #endif 478 479 extern int compat_ptrace_request(struct task_struct *child, 480 compat_long_t request, 481 compat_ulong_t addr, compat_ulong_t data); 482 483 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 484 compat_ulong_t addr, compat_ulong_t data); 485 486 struct epoll_event; /* fortunately, this one is fixed-layout */ 487 488 extern void __user *compat_alloc_user_space(unsigned long len); 489 490 int compat_restore_altstack(const compat_stack_t __user *uss); 491 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 492 #define unsafe_compat_save_altstack(uss, sp, label) do { \ 493 compat_stack_t __user *__uss = uss; \ 494 struct task_struct *t = current; \ 495 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \ 496 &__uss->ss_sp, label); \ 497 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \ 498 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \ 499 if (t->sas_ss_flags & SS_AUTODISARM) \ 500 sas_ss_reset(t); \ 501 } while (0); 502 503 /* 504 * These syscall function prototypes are kept in the same order as 505 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 506 * go below. 507 * 508 * Please note that these prototypes here are only provided for information 509 * purposes, for static analysis, and for linking from the syscall table. 510 * These functions should not be called elsewhere from kernel code. 511 * 512 * As the syscall calling convention may be different from the default 513 * for architectures overriding the syscall calling convention, do not 514 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 515 */ 516 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 517 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 518 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 519 u32 __user *iocb); 520 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 521 compat_long_t min_nr, 522 compat_long_t nr, 523 struct io_event __user *events, 524 struct old_timespec32 __user *timeout, 525 const struct __compat_aio_sigset __user *usig); 526 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, 527 compat_long_t min_nr, 528 compat_long_t nr, 529 struct io_event __user *events, 530 struct __kernel_timespec __user *timeout, 531 const struct __compat_aio_sigset __user *usig); 532 533 /* fs/cookies.c */ 534 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 535 536 /* fs/eventpoll.c */ 537 asmlinkage long compat_sys_epoll_pwait(int epfd, 538 struct epoll_event __user *events, 539 int maxevents, int timeout, 540 const compat_sigset_t __user *sigmask, 541 compat_size_t sigsetsize); 542 asmlinkage long compat_sys_epoll_pwait2(int epfd, 543 struct epoll_event __user *events, 544 int maxevents, 545 const struct __kernel_timespec __user *timeout, 546 const compat_sigset_t __user *sigmask, 547 compat_size_t sigsetsize); 548 549 /* fs/fcntl.c */ 550 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 551 compat_ulong_t arg); 552 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 553 compat_ulong_t arg); 554 555 /* fs/ioctl.c */ 556 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 557 compat_ulong_t arg); 558 559 /* fs/open.c */ 560 asmlinkage long compat_sys_statfs(const char __user *pathname, 561 struct compat_statfs __user *buf); 562 asmlinkage long compat_sys_statfs64(const char __user *pathname, 563 compat_size_t sz, 564 struct compat_statfs64 __user *buf); 565 asmlinkage long compat_sys_fstatfs(unsigned int fd, 566 struct compat_statfs __user *buf); 567 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 568 struct compat_statfs64 __user *buf); 569 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 570 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 571 /* No generic prototype for truncate64, ftruncate64, fallocate */ 572 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 573 int flags, umode_t mode); 574 575 /* fs/readdir.c */ 576 asmlinkage long compat_sys_getdents(unsigned int fd, 577 struct compat_linux_dirent __user *dirent, 578 unsigned int count); 579 580 /* fs/read_write.c */ 581 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 582 /* No generic prototype for pread64 and pwrite64 */ 583 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 584 const struct iovec __user *vec, 585 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 586 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 587 const struct iovec __user *vec, 588 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 589 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 590 asmlinkage long compat_sys_preadv64(unsigned long fd, 591 const struct iovec __user *vec, 592 unsigned long vlen, loff_t pos); 593 #endif 594 595 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 596 asmlinkage long compat_sys_pwritev64(unsigned long fd, 597 const struct iovec __user *vec, 598 unsigned long vlen, loff_t pos); 599 #endif 600 601 /* fs/sendfile.c */ 602 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 603 compat_off_t __user *offset, compat_size_t count); 604 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 605 compat_loff_t __user *offset, compat_size_t count); 606 607 /* fs/select.c */ 608 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, 609 compat_ulong_t __user *outp, 610 compat_ulong_t __user *exp, 611 struct old_timespec32 __user *tsp, 612 void __user *sig); 613 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, 614 compat_ulong_t __user *outp, 615 compat_ulong_t __user *exp, 616 struct __kernel_timespec __user *tsp, 617 void __user *sig); 618 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, 619 unsigned int nfds, 620 struct old_timespec32 __user *tsp, 621 const compat_sigset_t __user *sigmask, 622 compat_size_t sigsetsize); 623 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, 624 unsigned int nfds, 625 struct __kernel_timespec __user *tsp, 626 const compat_sigset_t __user *sigmask, 627 compat_size_t sigsetsize); 628 629 /* fs/signalfd.c */ 630 asmlinkage long compat_sys_signalfd4(int ufd, 631 const compat_sigset_t __user *sigmask, 632 compat_size_t sigsetsize, int flags); 633 634 /* fs/stat.c */ 635 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 636 const char __user *filename, 637 struct compat_stat __user *statbuf, 638 int flag); 639 asmlinkage long compat_sys_newfstat(unsigned int fd, 640 struct compat_stat __user *statbuf); 641 642 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 643 644 /* kernel/exit.c */ 645 asmlinkage long compat_sys_waitid(int, compat_pid_t, 646 struct compat_siginfo __user *, int, 647 struct compat_rusage __user *); 648 649 650 651 /* kernel/futex.c */ 652 asmlinkage long 653 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 654 compat_size_t len); 655 asmlinkage long 656 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 657 compat_size_t __user *len_ptr); 658 659 /* kernel/itimer.c */ 660 asmlinkage long compat_sys_getitimer(int which, 661 struct old_itimerval32 __user *it); 662 asmlinkage long compat_sys_setitimer(int which, 663 struct old_itimerval32 __user *in, 664 struct old_itimerval32 __user *out); 665 666 /* kernel/kexec.c */ 667 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 668 compat_ulong_t nr_segments, 669 struct compat_kexec_segment __user *, 670 compat_ulong_t flags); 671 672 /* kernel/posix-timers.c */ 673 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 674 struct compat_sigevent __user *timer_event_spec, 675 timer_t __user *created_timer_id); 676 677 /* kernel/ptrace.c */ 678 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 679 compat_long_t addr, compat_long_t data); 680 681 /* kernel/sched/core.c */ 682 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 683 unsigned int len, 684 compat_ulong_t __user *user_mask_ptr); 685 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 686 unsigned int len, 687 compat_ulong_t __user *user_mask_ptr); 688 689 /* kernel/signal.c */ 690 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 691 compat_stack_t __user *uoss_ptr); 692 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 693 compat_size_t sigsetsize); 694 #ifndef CONFIG_ODD_RT_SIGACTION 695 asmlinkage long compat_sys_rt_sigaction(int, 696 const struct compat_sigaction __user *, 697 struct compat_sigaction __user *, 698 compat_size_t); 699 #endif 700 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 701 compat_sigset_t __user *oset, 702 compat_size_t sigsetsize); 703 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 704 compat_size_t sigsetsize); 705 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, 706 struct compat_siginfo __user *uinfo, 707 struct old_timespec32 __user *uts, compat_size_t sigsetsize); 708 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, 709 struct compat_siginfo __user *uinfo, 710 struct __kernel_timespec __user *uts, compat_size_t sigsetsize); 711 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 712 struct compat_siginfo __user *uinfo); 713 /* No generic prototype for rt_sigreturn */ 714 715 /* kernel/sys.c */ 716 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 717 asmlinkage long compat_sys_getrlimit(unsigned int resource, 718 struct compat_rlimit __user *rlim); 719 asmlinkage long compat_sys_setrlimit(unsigned int resource, 720 struct compat_rlimit __user *rlim); 721 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 722 723 /* kernel/time.c */ 724 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, 725 struct timezone __user *tz); 726 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, 727 struct timezone __user *tz); 728 729 /* kernel/timer.c */ 730 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 731 732 /* ipc/mqueue.c */ 733 asmlinkage long compat_sys_mq_open(const char __user *u_name, 734 int oflag, compat_mode_t mode, 735 struct compat_mq_attr __user *u_attr); 736 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 737 const struct compat_sigevent __user *u_notification); 738 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 739 const struct compat_mq_attr __user *u_mqstat, 740 struct compat_mq_attr __user *u_omqstat); 741 742 /* ipc/msg.c */ 743 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 744 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 745 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 746 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 747 compat_ssize_t msgsz, int msgflg); 748 749 /* ipc/sem.c */ 750 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 751 752 /* ipc/shm.c */ 753 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 754 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 755 756 /* net/socket.c */ 757 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 758 unsigned flags, struct sockaddr __user *addr, 759 int __user *addrlen); 760 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 761 unsigned flags); 762 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 763 unsigned int flags); 764 765 /* mm/filemap.c: No generic prototype for readahead */ 766 767 /* security/keys/keyctl.c */ 768 asmlinkage long compat_sys_keyctl(u32 option, 769 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 770 771 /* arch/example/kernel/sys_example.c */ 772 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 773 const compat_uptr_t __user *envp); 774 775 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 776 777 /* mm/, CONFIG_MMU only */ 778 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 779 compat_ulong_t mode, 780 compat_ulong_t __user *nmask, 781 compat_ulong_t maxnode, compat_ulong_t flags); 782 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 783 compat_ulong_t __user *nmask, 784 compat_ulong_t maxnode, 785 compat_ulong_t addr, 786 compat_ulong_t flags); 787 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 788 compat_ulong_t maxnode); 789 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 790 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 791 const compat_ulong_t __user *new_nodes); 792 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 793 __u32 __user *pages, 794 const int __user *nodes, 795 int __user *status, 796 int flags); 797 798 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 799 compat_pid_t pid, int sig, 800 struct compat_siginfo __user *uinfo); 801 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, 802 unsigned vlen, unsigned int flags, 803 struct __kernel_timespec __user *timeout); 804 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, 805 unsigned vlen, unsigned int flags, 806 struct old_timespec32 __user *timeout); 807 asmlinkage long compat_sys_wait4(compat_pid_t pid, 808 compat_uint_t __user *stat_addr, int options, 809 struct compat_rusage __user *ru); 810 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 811 int, const char __user *); 812 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 813 struct file_handle __user *handle, 814 int flags); 815 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 816 unsigned vlen, unsigned int flags); 817 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 818 const compat_uptr_t __user *argv, 819 const compat_uptr_t __user *envp, int flags); 820 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 821 const struct iovec __user *vec, 822 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 823 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 824 const struct iovec __user *vec, 825 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 826 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 827 asmlinkage long compat_sys_preadv64v2(unsigned long fd, 828 const struct iovec __user *vec, 829 unsigned long vlen, loff_t pos, rwf_t flags); 830 #endif 831 832 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 833 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 834 const struct iovec __user *vec, 835 unsigned long vlen, loff_t pos, rwf_t flags); 836 #endif 837 838 839 /* 840 * Deprecated system calls which are still defined in 841 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 842 */ 843 844 /* __ARCH_WANT_SYSCALL_NO_AT */ 845 asmlinkage long compat_sys_open(const char __user *filename, int flags, 846 umode_t mode); 847 848 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 849 asmlinkage long compat_sys_signalfd(int ufd, 850 const compat_sigset_t __user *sigmask, 851 compat_size_t sigsetsize); 852 853 /* __ARCH_WANT_SYSCALL_OFF_T */ 854 asmlinkage long compat_sys_newstat(const char __user *filename, 855 struct compat_stat __user *statbuf); 856 asmlinkage long compat_sys_newlstat(const char __user *filename, 857 struct compat_stat __user *statbuf); 858 859 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 860 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 861 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 862 struct old_timeval32 __user *tvp); 863 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 864 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 865 unsigned flags); 866 867 /* obsolete: fs/readdir.c */ 868 asmlinkage long compat_sys_old_readdir(unsigned int fd, 869 struct compat_old_linux_dirent __user *, 870 unsigned int count); 871 872 /* obsolete: fs/select.c */ 873 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 874 875 /* obsolete: ipc */ 876 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 877 878 /* obsolete: kernel/signal.c */ 879 #ifdef __ARCH_WANT_SYS_SIGPENDING 880 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 881 #endif 882 883 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 884 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 885 compat_old_sigset_t __user *oset); 886 #endif 887 #ifdef CONFIG_COMPAT_OLD_SIGACTION 888 asmlinkage long compat_sys_sigaction(int sig, 889 const struct compat_old_sigaction __user *act, 890 struct compat_old_sigaction __user *oact); 891 #endif 892 893 /* obsolete: net/socket.c */ 894 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 895 896 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 897 898 899 /* 900 * For most but not all architectures, "am I in a compat syscall?" and 901 * "am I a compat task?" are the same question. For architectures on which 902 * they aren't the same question, arch code can override in_compat_syscall. 903 */ 904 905 #ifndef in_compat_syscall 906 static inline bool in_compat_syscall(void) { return is_compat_task(); } 907 #endif 908 909 /** 910 * ns_to_old_timeval32 - Compat version of ns_to_timeval 911 * @nsec: the nanoseconds value to be converted 912 * 913 * Returns the old_timeval32 representation of the nsec parameter. 914 */ 915 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 916 { 917 struct __kernel_old_timeval tv; 918 struct old_timeval32 ctv; 919 920 tv = ns_to_kernel_old_timeval(nsec); 921 ctv.tv_sec = tv.tv_sec; 922 ctv.tv_usec = tv.tv_usec; 923 924 return ctv; 925 } 926 927 /* 928 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) 929 * directly. Instead, use one of the functions which work equivalently, such 930 * as the kcompat_sys_xyzyyz() functions prototyped below. 931 */ 932 933 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, 934 struct compat_statfs64 __user * buf); 935 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 936 struct compat_statfs64 __user * buf); 937 938 #else /* !CONFIG_COMPAT */ 939 940 #define is_compat_task() (0) 941 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ 942 #define in_compat_syscall in_compat_syscall 943 static inline bool in_compat_syscall(void) { return false; } 944 945 #endif /* CONFIG_COMPAT */ 946 947 /* 948 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit 949 * types, and will need special compat treatment for that. Most architectures 950 * don't need that special handling even for compat syscalls. 951 */ 952 #ifndef compat_need_64bit_alignment_fixup 953 #define compat_need_64bit_alignment_fixup() false 954 #endif 955 956 /* 957 * A pointer passed in from user mode. This should not 958 * be used for syscall parameters, just declare them 959 * as pointers because the syscall entry code will have 960 * appropriately converted them already. 961 */ 962 #ifndef compat_ptr 963 static inline void __user *compat_ptr(compat_uptr_t uptr) 964 { 965 return (void __user *)(unsigned long)uptr; 966 } 967 #endif 968 969 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 970 { 971 return (u32)(unsigned long)uptr; 972 } 973 974 #endif /* _LINUX_COMPAT_H */ 975