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 #include <asm/siginfo.h> 24 #include <asm/signal.h> 25 26 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 27 /* 28 * It may be useful for an architecture to override the definitions of the 29 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular 30 * to use a different calling convention for syscalls. To allow for that, 31 + the prototypes for the compat_sys_*() functions below will *not* be included 32 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 33 */ 34 #include <asm/syscall_wrapper.h> 35 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 36 37 #ifndef COMPAT_USE_64BIT_TIME 38 #define COMPAT_USE_64BIT_TIME 0 39 #endif 40 41 #ifndef __SC_DELOUSE 42 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v)) 43 #endif 44 45 #ifndef COMPAT_SYSCALL_DEFINE0 46 #define COMPAT_SYSCALL_DEFINE0(name) \ 47 asmlinkage long compat_sys_##name(void); \ 48 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \ 49 asmlinkage long compat_sys_##name(void) 50 #endif /* COMPAT_SYSCALL_DEFINE0 */ 51 52 #define COMPAT_SYSCALL_DEFINE1(name, ...) \ 53 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) 54 #define COMPAT_SYSCALL_DEFINE2(name, ...) \ 55 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__) 56 #define COMPAT_SYSCALL_DEFINE3(name, ...) \ 57 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) 58 #define COMPAT_SYSCALL_DEFINE4(name, ...) \ 59 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__) 60 #define COMPAT_SYSCALL_DEFINE5(name, ...) \ 61 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__) 62 #define COMPAT_SYSCALL_DEFINE6(name, ...) \ 63 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__) 64 65 /* 66 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which 67 * sign-extends 32-bit ints to longs whenever needed. The actual work is 68 * done within __do_compat_sys_*(). 69 */ 70 #ifndef COMPAT_SYSCALL_DEFINEx 71 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ 72 __diag_push(); \ 73 __diag_ignore(GCC, 8, "-Wattribute-alias", \ 74 "Type aliasing is used to sanitize syscall arguments");\ 75 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \ 76 __attribute__((alias(__stringify(__se_compat_sys##name)))); \ 77 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \ 78 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\ 79 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ 80 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 81 { \ 82 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\ 83 __MAP(x,__SC_TEST,__VA_ARGS__); \ 84 return ret; \ 85 } \ 86 __diag_pop(); \ 87 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) 88 #endif /* COMPAT_SYSCALL_DEFINEx */ 89 90 struct compat_iovec { 91 compat_uptr_t iov_base; 92 compat_size_t iov_len; 93 }; 94 95 #ifndef compat_user_stack_pointer 96 #define compat_user_stack_pointer() current_user_stack_pointer() 97 #endif 98 #ifndef compat_sigaltstack /* we'll need that for MIPS */ 99 typedef struct compat_sigaltstack { 100 compat_uptr_t ss_sp; 101 int ss_flags; 102 compat_size_t ss_size; 103 } compat_stack_t; 104 #endif 105 #ifndef COMPAT_MINSIGSTKSZ 106 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ 107 #endif 108 109 #define compat_jiffies_to_clock_t(x) \ 110 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) 111 112 typedef __compat_uid32_t compat_uid_t; 113 typedef __compat_gid32_t compat_gid_t; 114 115 struct compat_sel_arg_struct; 116 struct rusage; 117 118 struct old_itimerval32; 119 120 struct compat_tms { 121 compat_clock_t tms_utime; 122 compat_clock_t tms_stime; 123 compat_clock_t tms_cutime; 124 compat_clock_t tms_cstime; 125 }; 126 127 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) 128 129 #ifndef compat_sigset_t 130 typedef struct { 131 compat_sigset_word sig[_COMPAT_NSIG_WORDS]; 132 } compat_sigset_t; 133 #endif 134 135 int set_compat_user_sigmask(const compat_sigset_t __user *umask, 136 size_t sigsetsize); 137 138 struct compat_sigaction { 139 #ifndef __ARCH_HAS_IRIX_SIGACTION 140 compat_uptr_t sa_handler; 141 compat_ulong_t sa_flags; 142 #else 143 compat_uint_t sa_flags; 144 compat_uptr_t sa_handler; 145 #endif 146 #ifdef __ARCH_HAS_SA_RESTORER 147 compat_uptr_t sa_restorer; 148 #endif 149 compat_sigset_t sa_mask __packed; 150 }; 151 152 typedef union compat_sigval { 153 compat_int_t sival_int; 154 compat_uptr_t sival_ptr; 155 } compat_sigval_t; 156 157 typedef struct compat_siginfo { 158 int si_signo; 159 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 160 int si_errno; 161 int si_code; 162 #else 163 int si_code; 164 int si_errno; 165 #endif 166 167 union { 168 int _pad[128/sizeof(int) - 3]; 169 170 /* kill() */ 171 struct { 172 compat_pid_t _pid; /* sender's pid */ 173 __compat_uid32_t _uid; /* sender's uid */ 174 } _kill; 175 176 /* POSIX.1b timers */ 177 struct { 178 compat_timer_t _tid; /* timer id */ 179 int _overrun; /* overrun count */ 180 compat_sigval_t _sigval; /* same as below */ 181 } _timer; 182 183 /* POSIX.1b signals */ 184 struct { 185 compat_pid_t _pid; /* sender's pid */ 186 __compat_uid32_t _uid; /* sender's uid */ 187 compat_sigval_t _sigval; 188 } _rt; 189 190 /* SIGCHLD */ 191 struct { 192 compat_pid_t _pid; /* which child */ 193 __compat_uid32_t _uid; /* sender's uid */ 194 int _status; /* exit code */ 195 compat_clock_t _utime; 196 compat_clock_t _stime; 197 } _sigchld; 198 199 #ifdef CONFIG_X86_X32_ABI 200 /* SIGCHLD (x32 version) */ 201 struct { 202 compat_pid_t _pid; /* which child */ 203 __compat_uid32_t _uid; /* sender's uid */ 204 int _status; /* exit code */ 205 compat_s64 _utime; 206 compat_s64 _stime; 207 } _sigchld_x32; 208 #endif 209 210 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */ 211 struct { 212 compat_uptr_t _addr; /* faulting insn/memory ref. */ 213 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ 214 sizeof(short) : __alignof__(compat_uptr_t)) 215 union { 216 /* used on alpha and sparc */ 217 int _trapno; /* TRAP # which caused the signal */ 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 /* used when si_code=TRAP_PERF */ 235 struct { 236 compat_ulong_t _data; 237 u32 _type; 238 } _perf; 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_stat; 385 struct compat_statfs; 386 struct compat_statfs64; 387 struct compat_old_linux_dirent; 388 struct compat_linux_dirent; 389 struct linux_dirent64; 390 struct compat_msghdr; 391 struct compat_mmsghdr; 392 struct compat_sysinfo; 393 struct compat_sysctl_args; 394 struct compat_kexec_segment; 395 struct compat_mq_attr; 396 struct compat_msgbuf; 397 398 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 399 400 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 401 402 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 403 unsigned long bitmap_size); 404 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 405 unsigned long bitmap_size); 406 void copy_siginfo_to_external32(struct compat_siginfo *to, 407 const struct kernel_siginfo *from); 408 int copy_siginfo_from_user32(kernel_siginfo_t *to, 409 const struct compat_siginfo __user *from); 410 int __copy_siginfo_to_user32(struct compat_siginfo __user *to, 411 const kernel_siginfo_t *from); 412 #ifndef copy_siginfo_to_user32 413 #define copy_siginfo_to_user32 __copy_siginfo_to_user32 414 #endif 415 int get_compat_sigevent(struct sigevent *event, 416 const struct compat_sigevent __user *u_event); 417 418 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 419 420 /* 421 * Defined inline such that size can be compile time constant, which avoids 422 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 423 */ 424 static inline int 425 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 426 unsigned int size) 427 { 428 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 429 #if defined(__BIG_ENDIAN) && defined(CONFIG_64BIT) 430 compat_sigset_t v; 431 switch (_NSIG_WORDS) { 432 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 433 fallthrough; 434 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 435 fallthrough; 436 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 437 fallthrough; 438 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 439 } 440 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 441 #else 442 return copy_to_user(compat, set, size) ? -EFAULT : 0; 443 #endif 444 } 445 446 #ifdef CONFIG_CPU_BIG_ENDIAN 447 #define unsafe_put_compat_sigset(compat, set, label) do { \ 448 compat_sigset_t __user *__c = compat; \ 449 const sigset_t *__s = set; \ 450 \ 451 switch (_NSIG_WORDS) { \ 452 case 4: \ 453 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \ 454 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \ 455 fallthrough; \ 456 case 3: \ 457 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \ 458 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \ 459 fallthrough; \ 460 case 2: \ 461 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \ 462 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \ 463 fallthrough; \ 464 case 1: \ 465 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \ 466 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \ 467 } \ 468 } while (0) 469 470 #define unsafe_get_compat_sigset(set, compat, label) do { \ 471 const compat_sigset_t __user *__c = compat; \ 472 compat_sigset_word hi, lo; \ 473 sigset_t *__s = set; \ 474 \ 475 switch (_NSIG_WORDS) { \ 476 case 4: \ 477 unsafe_get_user(lo, &__c->sig[7], label); \ 478 unsafe_get_user(hi, &__c->sig[6], label); \ 479 __s->sig[3] = hi | (((long)lo) << 32); \ 480 fallthrough; \ 481 case 3: \ 482 unsafe_get_user(lo, &__c->sig[5], label); \ 483 unsafe_get_user(hi, &__c->sig[4], label); \ 484 __s->sig[2] = hi | (((long)lo) << 32); \ 485 fallthrough; \ 486 case 2: \ 487 unsafe_get_user(lo, &__c->sig[3], label); \ 488 unsafe_get_user(hi, &__c->sig[2], label); \ 489 __s->sig[1] = hi | (((long)lo) << 32); \ 490 fallthrough; \ 491 case 1: \ 492 unsafe_get_user(lo, &__c->sig[1], label); \ 493 unsafe_get_user(hi, &__c->sig[0], label); \ 494 __s->sig[0] = hi | (((long)lo) << 32); \ 495 } \ 496 } while (0) 497 #else 498 #define unsafe_put_compat_sigset(compat, set, label) do { \ 499 compat_sigset_t __user *__c = compat; \ 500 const sigset_t *__s = set; \ 501 \ 502 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \ 503 } while (0) 504 505 #define unsafe_get_compat_sigset(set, compat, label) do { \ 506 const compat_sigset_t __user *__c = compat; \ 507 sigset_t *__s = set; \ 508 \ 509 unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \ 510 } while (0) 511 #endif 512 513 extern int compat_ptrace_request(struct task_struct *child, 514 compat_long_t request, 515 compat_ulong_t addr, compat_ulong_t data); 516 517 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 518 compat_ulong_t addr, compat_ulong_t data); 519 520 struct epoll_event; /* fortunately, this one is fixed-layout */ 521 522 extern void __user *compat_alloc_user_space(unsigned long len); 523 524 int compat_restore_altstack(const compat_stack_t __user *uss); 525 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 526 #define unsafe_compat_save_altstack(uss, sp, label) do { \ 527 compat_stack_t __user *__uss = uss; \ 528 struct task_struct *t = current; \ 529 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \ 530 &__uss->ss_sp, label); \ 531 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \ 532 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \ 533 } while (0); 534 535 /* 536 * These syscall function prototypes are kept in the same order as 537 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 538 * go below. 539 * 540 * Please note that these prototypes here are only provided for information 541 * purposes, for static analysis, and for linking from the syscall table. 542 * These functions should not be called elsewhere from kernel code. 543 * 544 * As the syscall calling convention may be different from the default 545 * for architectures overriding the syscall calling convention, do not 546 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 547 */ 548 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 549 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 550 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 551 u32 __user *iocb); 552 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 553 compat_long_t min_nr, 554 compat_long_t nr, 555 struct io_event __user *events, 556 struct old_timespec32 __user *timeout, 557 const struct __compat_aio_sigset __user *usig); 558 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, 559 compat_long_t min_nr, 560 compat_long_t nr, 561 struct io_event __user *events, 562 struct __kernel_timespec __user *timeout, 563 const struct __compat_aio_sigset __user *usig); 564 565 /* fs/cookies.c */ 566 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 567 568 /* fs/eventpoll.c */ 569 asmlinkage long compat_sys_epoll_pwait(int epfd, 570 struct epoll_event __user *events, 571 int maxevents, int timeout, 572 const compat_sigset_t __user *sigmask, 573 compat_size_t sigsetsize); 574 asmlinkage long compat_sys_epoll_pwait2(int epfd, 575 struct epoll_event __user *events, 576 int maxevents, 577 const struct __kernel_timespec __user *timeout, 578 const compat_sigset_t __user *sigmask, 579 compat_size_t sigsetsize); 580 581 /* fs/fcntl.c */ 582 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 583 compat_ulong_t arg); 584 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 585 compat_ulong_t arg); 586 587 /* fs/ioctl.c */ 588 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 589 compat_ulong_t arg); 590 591 /* fs/open.c */ 592 asmlinkage long compat_sys_statfs(const char __user *pathname, 593 struct compat_statfs __user *buf); 594 asmlinkage long compat_sys_statfs64(const char __user *pathname, 595 compat_size_t sz, 596 struct compat_statfs64 __user *buf); 597 asmlinkage long compat_sys_fstatfs(unsigned int fd, 598 struct compat_statfs __user *buf); 599 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 600 struct compat_statfs64 __user *buf); 601 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 602 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 603 /* No generic prototype for truncate64, ftruncate64, fallocate */ 604 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 605 int flags, umode_t mode); 606 607 /* fs/readdir.c */ 608 asmlinkage long compat_sys_getdents(unsigned int fd, 609 struct compat_linux_dirent __user *dirent, 610 unsigned int count); 611 612 /* fs/read_write.c */ 613 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 614 /* No generic prototype for pread64 and pwrite64 */ 615 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 616 const struct iovec __user *vec, 617 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 618 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 619 const struct iovec __user *vec, 620 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 621 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 622 asmlinkage long compat_sys_preadv64(unsigned long fd, 623 const struct iovec __user *vec, 624 unsigned long vlen, loff_t pos); 625 #endif 626 627 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 628 asmlinkage long compat_sys_pwritev64(unsigned long fd, 629 const struct iovec __user *vec, 630 unsigned long vlen, loff_t pos); 631 #endif 632 633 /* fs/sendfile.c */ 634 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 635 compat_off_t __user *offset, compat_size_t count); 636 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 637 compat_loff_t __user *offset, compat_size_t count); 638 639 /* fs/select.c */ 640 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, 641 compat_ulong_t __user *outp, 642 compat_ulong_t __user *exp, 643 struct old_timespec32 __user *tsp, 644 void __user *sig); 645 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, 646 compat_ulong_t __user *outp, 647 compat_ulong_t __user *exp, 648 struct __kernel_timespec __user *tsp, 649 void __user *sig); 650 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, 651 unsigned int nfds, 652 struct old_timespec32 __user *tsp, 653 const compat_sigset_t __user *sigmask, 654 compat_size_t sigsetsize); 655 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, 656 unsigned int nfds, 657 struct __kernel_timespec __user *tsp, 658 const compat_sigset_t __user *sigmask, 659 compat_size_t sigsetsize); 660 661 /* fs/signalfd.c */ 662 asmlinkage long compat_sys_signalfd4(int ufd, 663 const compat_sigset_t __user *sigmask, 664 compat_size_t sigsetsize, int flags); 665 666 /* fs/stat.c */ 667 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 668 const char __user *filename, 669 struct compat_stat __user *statbuf, 670 int flag); 671 asmlinkage long compat_sys_newfstat(unsigned int fd, 672 struct compat_stat __user *statbuf); 673 674 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 675 676 /* kernel/exit.c */ 677 asmlinkage long compat_sys_waitid(int, compat_pid_t, 678 struct compat_siginfo __user *, int, 679 struct compat_rusage __user *); 680 681 682 683 /* kernel/futex.c */ 684 asmlinkage long 685 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 686 compat_size_t len); 687 asmlinkage long 688 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 689 compat_size_t __user *len_ptr); 690 691 /* kernel/itimer.c */ 692 asmlinkage long compat_sys_getitimer(int which, 693 struct old_itimerval32 __user *it); 694 asmlinkage long compat_sys_setitimer(int which, 695 struct old_itimerval32 __user *in, 696 struct old_itimerval32 __user *out); 697 698 /* kernel/kexec.c */ 699 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 700 compat_ulong_t nr_segments, 701 struct compat_kexec_segment __user *, 702 compat_ulong_t flags); 703 704 /* kernel/posix-timers.c */ 705 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 706 struct compat_sigevent __user *timer_event_spec, 707 timer_t __user *created_timer_id); 708 709 /* kernel/ptrace.c */ 710 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 711 compat_long_t addr, compat_long_t data); 712 713 /* kernel/sched/core.c */ 714 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 715 unsigned int len, 716 compat_ulong_t __user *user_mask_ptr); 717 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 718 unsigned int len, 719 compat_ulong_t __user *user_mask_ptr); 720 721 /* kernel/signal.c */ 722 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 723 compat_stack_t __user *uoss_ptr); 724 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 725 compat_size_t sigsetsize); 726 #ifndef CONFIG_ODD_RT_SIGACTION 727 asmlinkage long compat_sys_rt_sigaction(int, 728 const struct compat_sigaction __user *, 729 struct compat_sigaction __user *, 730 compat_size_t); 731 #endif 732 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 733 compat_sigset_t __user *oset, 734 compat_size_t sigsetsize); 735 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 736 compat_size_t sigsetsize); 737 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, 738 struct compat_siginfo __user *uinfo, 739 struct old_timespec32 __user *uts, compat_size_t sigsetsize); 740 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, 741 struct compat_siginfo __user *uinfo, 742 struct __kernel_timespec __user *uts, compat_size_t sigsetsize); 743 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 744 struct compat_siginfo __user *uinfo); 745 /* No generic prototype for rt_sigreturn */ 746 747 /* kernel/sys.c */ 748 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 749 asmlinkage long compat_sys_getrlimit(unsigned int resource, 750 struct compat_rlimit __user *rlim); 751 asmlinkage long compat_sys_setrlimit(unsigned int resource, 752 struct compat_rlimit __user *rlim); 753 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 754 755 /* kernel/time.c */ 756 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, 757 struct timezone __user *tz); 758 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, 759 struct timezone __user *tz); 760 761 /* kernel/timer.c */ 762 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 763 764 /* ipc/mqueue.c */ 765 asmlinkage long compat_sys_mq_open(const char __user *u_name, 766 int oflag, compat_mode_t mode, 767 struct compat_mq_attr __user *u_attr); 768 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 769 const struct compat_sigevent __user *u_notification); 770 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 771 const struct compat_mq_attr __user *u_mqstat, 772 struct compat_mq_attr __user *u_omqstat); 773 774 /* ipc/msg.c */ 775 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 776 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 777 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 778 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 779 compat_ssize_t msgsz, int msgflg); 780 781 /* ipc/sem.c */ 782 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 783 784 /* ipc/shm.c */ 785 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 786 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 787 788 /* net/socket.c */ 789 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 790 unsigned flags, struct sockaddr __user *addr, 791 int __user *addrlen); 792 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 793 unsigned flags); 794 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 795 unsigned int flags); 796 797 /* mm/filemap.c: No generic prototype for readahead */ 798 799 /* security/keys/keyctl.c */ 800 asmlinkage long compat_sys_keyctl(u32 option, 801 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 802 803 /* arch/example/kernel/sys_example.c */ 804 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 805 const compat_uptr_t __user *envp); 806 807 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 808 809 /* mm/, CONFIG_MMU only */ 810 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 811 compat_ulong_t mode, 812 compat_ulong_t __user *nmask, 813 compat_ulong_t maxnode, compat_ulong_t flags); 814 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 815 compat_ulong_t __user *nmask, 816 compat_ulong_t maxnode, 817 compat_ulong_t addr, 818 compat_ulong_t flags); 819 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 820 compat_ulong_t maxnode); 821 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 822 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 823 const compat_ulong_t __user *new_nodes); 824 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 825 __u32 __user *pages, 826 const int __user *nodes, 827 int __user *status, 828 int flags); 829 830 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 831 compat_pid_t pid, int sig, 832 struct compat_siginfo __user *uinfo); 833 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, 834 unsigned vlen, unsigned int flags, 835 struct __kernel_timespec __user *timeout); 836 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, 837 unsigned vlen, unsigned int flags, 838 struct old_timespec32 __user *timeout); 839 asmlinkage long compat_sys_wait4(compat_pid_t pid, 840 compat_uint_t __user *stat_addr, int options, 841 struct compat_rusage __user *ru); 842 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 843 int, const char __user *); 844 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 845 struct file_handle __user *handle, 846 int flags); 847 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 848 unsigned vlen, unsigned int flags); 849 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 850 const compat_uptr_t __user *argv, 851 const compat_uptr_t __user *envp, int flags); 852 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 853 const struct iovec __user *vec, 854 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 855 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 856 const struct iovec __user *vec, 857 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 858 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 859 asmlinkage long compat_sys_preadv64v2(unsigned long fd, 860 const struct iovec __user *vec, 861 unsigned long vlen, loff_t pos, rwf_t flags); 862 #endif 863 864 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 865 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 866 const struct iovec __user *vec, 867 unsigned long vlen, loff_t pos, rwf_t flags); 868 #endif 869 870 871 /* 872 * Deprecated system calls which are still defined in 873 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 874 */ 875 876 /* __ARCH_WANT_SYSCALL_NO_AT */ 877 asmlinkage long compat_sys_open(const char __user *filename, int flags, 878 umode_t mode); 879 880 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 881 asmlinkage long compat_sys_signalfd(int ufd, 882 const compat_sigset_t __user *sigmask, 883 compat_size_t sigsetsize); 884 885 /* __ARCH_WANT_SYSCALL_OFF_T */ 886 asmlinkage long compat_sys_newstat(const char __user *filename, 887 struct compat_stat __user *statbuf); 888 asmlinkage long compat_sys_newlstat(const char __user *filename, 889 struct compat_stat __user *statbuf); 890 891 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 892 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 893 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 894 struct old_timeval32 __user *tvp); 895 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 896 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 897 unsigned flags); 898 899 /* obsolete: fs/readdir.c */ 900 asmlinkage long compat_sys_old_readdir(unsigned int fd, 901 struct compat_old_linux_dirent __user *, 902 unsigned int count); 903 904 /* obsolete: fs/select.c */ 905 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 906 907 /* obsolete: ipc */ 908 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 909 910 /* obsolete: kernel/signal.c */ 911 #ifdef __ARCH_WANT_SYS_SIGPENDING 912 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 913 #endif 914 915 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 916 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 917 compat_old_sigset_t __user *oset); 918 #endif 919 #ifdef CONFIG_COMPAT_OLD_SIGACTION 920 asmlinkage long compat_sys_sigaction(int sig, 921 const struct compat_old_sigaction __user *act, 922 struct compat_old_sigaction __user *oact); 923 #endif 924 925 /* obsolete: net/socket.c */ 926 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 927 928 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 929 930 /** 931 * ns_to_old_timeval32 - Compat version of ns_to_timeval 932 * @nsec: the nanoseconds value to be converted 933 * 934 * Returns the old_timeval32 representation of the nsec parameter. 935 */ 936 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 937 { 938 struct __kernel_old_timeval tv; 939 struct old_timeval32 ctv; 940 941 tv = ns_to_kernel_old_timeval(nsec); 942 ctv.tv_sec = tv.tv_sec; 943 ctv.tv_usec = tv.tv_usec; 944 945 return ctv; 946 } 947 948 /* 949 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) 950 * directly. Instead, use one of the functions which work equivalently, such 951 * as the kcompat_sys_xyzyyz() functions prototyped below. 952 */ 953 954 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, 955 struct compat_statfs64 __user * buf); 956 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 957 struct compat_statfs64 __user * buf); 958 959 #ifdef CONFIG_COMPAT 960 961 /* 962 * For most but not all architectures, "am I in a compat syscall?" and 963 * "am I a compat task?" are the same question. For architectures on which 964 * they aren't the same question, arch code can override in_compat_syscall. 965 */ 966 #ifndef in_compat_syscall 967 static inline bool in_compat_syscall(void) { return is_compat_task(); } 968 #endif 969 970 #else /* !CONFIG_COMPAT */ 971 972 #define is_compat_task() (0) 973 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ 974 #define in_compat_syscall in_compat_syscall 975 static inline bool in_compat_syscall(void) { return false; } 976 977 #endif /* CONFIG_COMPAT */ 978 979 /* 980 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit 981 * types, and will need special compat treatment for that. Most architectures 982 * don't need that special handling even for compat syscalls. 983 */ 984 #ifndef compat_need_64bit_alignment_fixup 985 #define compat_need_64bit_alignment_fixup() false 986 #endif 987 988 /* 989 * A pointer passed in from user mode. This should not 990 * be used for syscall parameters, just declare them 991 * as pointers because the syscall entry code will have 992 * appropriately converted them already. 993 */ 994 #ifndef compat_ptr 995 static inline void __user *compat_ptr(compat_uptr_t uptr) 996 { 997 return (void __user *)(unsigned long)uptr; 998 } 999 #endif 1000 1001 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 1002 { 1003 return (u32)(unsigned long)uptr; 1004 } 1005 1006 #endif /* _LINUX_COMPAT_H */ 1007