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 __attribute__((alias(__stringify(__se_compat_sys##name)))); \ 80 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \ 81 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\ 82 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ 83 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 84 { \ 85 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\ 86 __MAP(x,__SC_TEST,__VA_ARGS__); \ 87 return ret; \ 88 } \ 89 __diag_pop(); \ 90 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) 91 #endif /* COMPAT_SYSCALL_DEFINEx */ 92 93 struct compat_iovec { 94 compat_uptr_t iov_base; 95 compat_size_t iov_len; 96 }; 97 98 #ifdef CONFIG_COMPAT 99 100 #ifndef compat_user_stack_pointer 101 #define compat_user_stack_pointer() current_user_stack_pointer() 102 #endif 103 #ifndef compat_sigaltstack /* we'll need that for MIPS */ 104 typedef struct compat_sigaltstack { 105 compat_uptr_t ss_sp; 106 int ss_flags; 107 compat_size_t ss_size; 108 } compat_stack_t; 109 #endif 110 #ifndef COMPAT_MINSIGSTKSZ 111 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ 112 #endif 113 114 #define compat_jiffies_to_clock_t(x) \ 115 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) 116 117 typedef __compat_uid32_t compat_uid_t; 118 typedef __compat_gid32_t compat_gid_t; 119 120 struct compat_sel_arg_struct; 121 struct rusage; 122 123 struct old_itimerval32; 124 125 struct compat_tms { 126 compat_clock_t tms_utime; 127 compat_clock_t tms_stime; 128 compat_clock_t tms_cutime; 129 compat_clock_t tms_cstime; 130 }; 131 132 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW) 133 134 typedef struct { 135 compat_sigset_word sig[_COMPAT_NSIG_WORDS]; 136 } compat_sigset_t; 137 138 int set_compat_user_sigmask(const compat_sigset_t __user *umask, 139 size_t sigsetsize); 140 141 struct compat_sigaction { 142 #ifndef __ARCH_HAS_IRIX_SIGACTION 143 compat_uptr_t sa_handler; 144 compat_ulong_t sa_flags; 145 #else 146 compat_uint_t sa_flags; 147 compat_uptr_t sa_handler; 148 #endif 149 #ifdef __ARCH_HAS_SA_RESTORER 150 compat_uptr_t sa_restorer; 151 #endif 152 compat_sigset_t sa_mask __packed; 153 }; 154 155 typedef union compat_sigval { 156 compat_int_t sival_int; 157 compat_uptr_t sival_ptr; 158 } compat_sigval_t; 159 160 typedef struct compat_siginfo { 161 int si_signo; 162 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 163 int si_errno; 164 int si_code; 165 #else 166 int si_code; 167 int si_errno; 168 #endif 169 170 union { 171 int _pad[128/sizeof(int) - 3]; 172 173 /* kill() */ 174 struct { 175 compat_pid_t _pid; /* sender's pid */ 176 __compat_uid32_t _uid; /* sender's uid */ 177 } _kill; 178 179 /* POSIX.1b timers */ 180 struct { 181 compat_timer_t _tid; /* timer id */ 182 int _overrun; /* overrun count */ 183 compat_sigval_t _sigval; /* same as below */ 184 } _timer; 185 186 /* POSIX.1b signals */ 187 struct { 188 compat_pid_t _pid; /* sender's pid */ 189 __compat_uid32_t _uid; /* sender's uid */ 190 compat_sigval_t _sigval; 191 } _rt; 192 193 /* SIGCHLD */ 194 struct { 195 compat_pid_t _pid; /* which child */ 196 __compat_uid32_t _uid; /* sender's uid */ 197 int _status; /* exit code */ 198 compat_clock_t _utime; 199 compat_clock_t _stime; 200 } _sigchld; 201 202 #ifdef CONFIG_X86_X32_ABI 203 /* SIGCHLD (x32 version) */ 204 struct { 205 compat_pid_t _pid; /* which child */ 206 __compat_uid32_t _uid; /* sender's uid */ 207 int _status; /* exit code */ 208 compat_s64 _utime; 209 compat_s64 _stime; 210 } _sigchld_x32; 211 #endif 212 213 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */ 214 struct { 215 compat_uptr_t _addr; /* faulting insn/memory ref. */ 216 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \ 217 sizeof(short) : __alignof__(compat_uptr_t)) 218 union { 219 /* used on alpha and sparc */ 220 int _trapno; /* TRAP # which caused the signal */ 221 /* 222 * used when si_code=BUS_MCEERR_AR or 223 * used when si_code=BUS_MCEERR_AO 224 */ 225 short int _addr_lsb; /* Valid LSB of the reported address. */ 226 /* used when si_code=SEGV_BNDERR */ 227 struct { 228 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD]; 229 compat_uptr_t _lower; 230 compat_uptr_t _upper; 231 } _addr_bnd; 232 /* used when si_code=SEGV_PKUERR */ 233 struct { 234 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD]; 235 u32 _pkey; 236 } _addr_pkey; 237 /* used when si_code=TRAP_PERF */ 238 struct { 239 compat_ulong_t _data; 240 u32 _type; 241 } _perf; 242 }; 243 } _sigfault; 244 245 /* SIGPOLL */ 246 struct { 247 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 248 int _fd; 249 } _sigpoll; 250 251 struct { 252 compat_uptr_t _call_addr; /* calling user insn */ 253 int _syscall; /* triggering system call number */ 254 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 255 } _sigsys; 256 } _sifields; 257 } compat_siginfo_t; 258 259 struct compat_rlimit { 260 compat_ulong_t rlim_cur; 261 compat_ulong_t rlim_max; 262 }; 263 264 struct compat_rusage { 265 struct old_timeval32 ru_utime; 266 struct old_timeval32 ru_stime; 267 compat_long_t ru_maxrss; 268 compat_long_t ru_ixrss; 269 compat_long_t ru_idrss; 270 compat_long_t ru_isrss; 271 compat_long_t ru_minflt; 272 compat_long_t ru_majflt; 273 compat_long_t ru_nswap; 274 compat_long_t ru_inblock; 275 compat_long_t ru_oublock; 276 compat_long_t ru_msgsnd; 277 compat_long_t ru_msgrcv; 278 compat_long_t ru_nsignals; 279 compat_long_t ru_nvcsw; 280 compat_long_t ru_nivcsw; 281 }; 282 283 extern int put_compat_rusage(const struct rusage *, 284 struct compat_rusage __user *); 285 286 struct compat_siginfo; 287 struct __compat_aio_sigset; 288 289 struct compat_dirent { 290 u32 d_ino; 291 compat_off_t d_off; 292 u16 d_reclen; 293 char d_name[256]; 294 }; 295 296 struct compat_ustat { 297 compat_daddr_t f_tfree; 298 compat_ino_t f_tinode; 299 char f_fname[6]; 300 char f_fpack[6]; 301 }; 302 303 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 304 305 typedef struct compat_sigevent { 306 compat_sigval_t sigev_value; 307 compat_int_t sigev_signo; 308 compat_int_t sigev_notify; 309 union { 310 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 311 compat_int_t _tid; 312 313 struct { 314 compat_uptr_t _function; 315 compat_uptr_t _attribute; 316 } _sigev_thread; 317 } _sigev_un; 318 } compat_sigevent_t; 319 320 struct compat_ifmap { 321 compat_ulong_t mem_start; 322 compat_ulong_t mem_end; 323 unsigned short base_addr; 324 unsigned char irq; 325 unsigned char dma; 326 unsigned char port; 327 }; 328 329 struct compat_if_settings { 330 unsigned int type; /* Type of physical device or protocol */ 331 unsigned int size; /* Size of the data allocated by the caller */ 332 compat_uptr_t ifs_ifsu; /* union of pointers */ 333 }; 334 335 struct compat_ifreq { 336 union { 337 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 338 } ifr_ifrn; 339 union { 340 struct sockaddr ifru_addr; 341 struct sockaddr ifru_dstaddr; 342 struct sockaddr ifru_broadaddr; 343 struct sockaddr ifru_netmask; 344 struct sockaddr ifru_hwaddr; 345 short ifru_flags; 346 compat_int_t ifru_ivalue; 347 compat_int_t ifru_mtu; 348 struct compat_ifmap ifru_map; 349 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 350 char ifru_newname[IFNAMSIZ]; 351 compat_caddr_t ifru_data; 352 struct compat_if_settings ifru_settings; 353 } ifr_ifru; 354 }; 355 356 struct compat_ifconf { 357 compat_int_t ifc_len; /* size of buffer */ 358 compat_caddr_t ifcbuf; 359 }; 360 361 struct compat_robust_list { 362 compat_uptr_t next; 363 }; 364 365 struct compat_robust_list_head { 366 struct compat_robust_list list; 367 compat_long_t futex_offset; 368 compat_uptr_t list_op_pending; 369 }; 370 371 #ifdef CONFIG_COMPAT_OLD_SIGACTION 372 struct compat_old_sigaction { 373 compat_uptr_t sa_handler; 374 compat_old_sigset_t sa_mask; 375 compat_ulong_t sa_flags; 376 compat_uptr_t sa_restorer; 377 }; 378 #endif 379 380 struct compat_keyctl_kdf_params { 381 compat_uptr_t hashname; 382 compat_uptr_t otherinfo; 383 __u32 otherinfolen; 384 __u32 __spare[8]; 385 }; 386 387 struct compat_statfs; 388 struct compat_statfs64; 389 struct compat_old_linux_dirent; 390 struct compat_linux_dirent; 391 struct linux_dirent64; 392 struct compat_msghdr; 393 struct compat_mmsghdr; 394 struct compat_sysinfo; 395 struct compat_sysctl_args; 396 struct compat_kexec_segment; 397 struct compat_mq_attr; 398 struct compat_msgbuf; 399 400 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 401 402 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 403 404 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 405 unsigned long bitmap_size); 406 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 407 unsigned long bitmap_size); 408 void copy_siginfo_to_external32(struct compat_siginfo *to, 409 const struct kernel_siginfo *from); 410 int copy_siginfo_from_user32(kernel_siginfo_t *to, 411 const struct compat_siginfo __user *from); 412 int __copy_siginfo_to_user32(struct compat_siginfo __user *to, 413 const kernel_siginfo_t *from); 414 #ifndef copy_siginfo_to_user32 415 #define copy_siginfo_to_user32 __copy_siginfo_to_user32 416 #endif 417 int get_compat_sigevent(struct sigevent *event, 418 const struct compat_sigevent __user *u_event); 419 420 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 421 422 /* 423 * Defined inline such that size can be compile time constant, which avoids 424 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 425 */ 426 static inline int 427 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 428 unsigned int size) 429 { 430 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 431 #ifdef __BIG_ENDIAN 432 compat_sigset_t v; 433 switch (_NSIG_WORDS) { 434 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 435 fallthrough; 436 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 437 fallthrough; 438 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 439 fallthrough; 440 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 441 } 442 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 443 #else 444 return copy_to_user(compat, set, size) ? -EFAULT : 0; 445 #endif 446 } 447 448 #ifdef CONFIG_CPU_BIG_ENDIAN 449 #define unsafe_put_compat_sigset(compat, set, label) do { \ 450 compat_sigset_t __user *__c = compat; \ 451 const sigset_t *__s = set; \ 452 \ 453 switch (_NSIG_WORDS) { \ 454 case 4: \ 455 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \ 456 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \ 457 fallthrough; \ 458 case 3: \ 459 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \ 460 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \ 461 fallthrough; \ 462 case 2: \ 463 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \ 464 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \ 465 fallthrough; \ 466 case 1: \ 467 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \ 468 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \ 469 } \ 470 } while (0) 471 472 #define unsafe_get_compat_sigset(set, compat, label) do { \ 473 const compat_sigset_t __user *__c = compat; \ 474 compat_sigset_word hi, lo; \ 475 sigset_t *__s = set; \ 476 \ 477 switch (_NSIG_WORDS) { \ 478 case 4: \ 479 unsafe_get_user(lo, &__c->sig[7], label); \ 480 unsafe_get_user(hi, &__c->sig[6], label); \ 481 __s->sig[3] = hi | (((long)lo) << 32); \ 482 fallthrough; \ 483 case 3: \ 484 unsafe_get_user(lo, &__c->sig[5], label); \ 485 unsafe_get_user(hi, &__c->sig[4], label); \ 486 __s->sig[2] = hi | (((long)lo) << 32); \ 487 fallthrough; \ 488 case 2: \ 489 unsafe_get_user(lo, &__c->sig[3], label); \ 490 unsafe_get_user(hi, &__c->sig[2], label); \ 491 __s->sig[1] = hi | (((long)lo) << 32); \ 492 fallthrough; \ 493 case 1: \ 494 unsafe_get_user(lo, &__c->sig[1], label); \ 495 unsafe_get_user(hi, &__c->sig[0], label); \ 496 __s->sig[0] = hi | (((long)lo) << 32); \ 497 } \ 498 } while (0) 499 #else 500 #define unsafe_put_compat_sigset(compat, set, label) do { \ 501 compat_sigset_t __user *__c = compat; \ 502 const sigset_t *__s = set; \ 503 \ 504 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \ 505 } while (0) 506 507 #define unsafe_get_compat_sigset(set, compat, label) do { \ 508 const compat_sigset_t __user *__c = compat; \ 509 sigset_t *__s = set; \ 510 \ 511 unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \ 512 } while (0) 513 #endif 514 515 extern int compat_ptrace_request(struct task_struct *child, 516 compat_long_t request, 517 compat_ulong_t addr, compat_ulong_t data); 518 519 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 520 compat_ulong_t addr, compat_ulong_t data); 521 522 struct epoll_event; /* fortunately, this one is fixed-layout */ 523 524 extern void __user *compat_alloc_user_space(unsigned long len); 525 526 int compat_restore_altstack(const compat_stack_t __user *uss); 527 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 528 #define unsafe_compat_save_altstack(uss, sp, label) do { \ 529 compat_stack_t __user *__uss = uss; \ 530 struct task_struct *t = current; \ 531 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \ 532 &__uss->ss_sp, label); \ 533 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \ 534 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \ 535 if (t->sas_ss_flags & SS_AUTODISARM) \ 536 sas_ss_reset(t); \ 537 } while (0); 538 539 /* 540 * These syscall function prototypes are kept in the same order as 541 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 542 * go below. 543 * 544 * Please note that these prototypes here are only provided for information 545 * purposes, for static analysis, and for linking from the syscall table. 546 * These functions should not be called elsewhere from kernel code. 547 * 548 * As the syscall calling convention may be different from the default 549 * for architectures overriding the syscall calling convention, do not 550 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 551 */ 552 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 553 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 554 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 555 u32 __user *iocb); 556 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 557 compat_long_t min_nr, 558 compat_long_t nr, 559 struct io_event __user *events, 560 struct old_timespec32 __user *timeout, 561 const struct __compat_aio_sigset __user *usig); 562 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, 563 compat_long_t min_nr, 564 compat_long_t nr, 565 struct io_event __user *events, 566 struct __kernel_timespec __user *timeout, 567 const struct __compat_aio_sigset __user *usig); 568 569 /* fs/cookies.c */ 570 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); 571 572 /* fs/eventpoll.c */ 573 asmlinkage long compat_sys_epoll_pwait(int epfd, 574 struct epoll_event __user *events, 575 int maxevents, int timeout, 576 const compat_sigset_t __user *sigmask, 577 compat_size_t sigsetsize); 578 asmlinkage long compat_sys_epoll_pwait2(int epfd, 579 struct epoll_event __user *events, 580 int maxevents, 581 const struct __kernel_timespec __user *timeout, 582 const compat_sigset_t __user *sigmask, 583 compat_size_t sigsetsize); 584 585 /* fs/fcntl.c */ 586 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 587 compat_ulong_t arg); 588 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 589 compat_ulong_t arg); 590 591 /* fs/ioctl.c */ 592 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 593 compat_ulong_t arg); 594 595 /* fs/open.c */ 596 asmlinkage long compat_sys_statfs(const char __user *pathname, 597 struct compat_statfs __user *buf); 598 asmlinkage long compat_sys_statfs64(const char __user *pathname, 599 compat_size_t sz, 600 struct compat_statfs64 __user *buf); 601 asmlinkage long compat_sys_fstatfs(unsigned int fd, 602 struct compat_statfs __user *buf); 603 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 604 struct compat_statfs64 __user *buf); 605 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 606 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t); 607 /* No generic prototype for truncate64, ftruncate64, fallocate */ 608 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 609 int flags, umode_t mode); 610 611 /* fs/readdir.c */ 612 asmlinkage long compat_sys_getdents(unsigned int fd, 613 struct compat_linux_dirent __user *dirent, 614 unsigned int count); 615 616 /* fs/read_write.c */ 617 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 618 /* No generic prototype for pread64 and pwrite64 */ 619 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 620 const struct iovec __user *vec, 621 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 622 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 623 const struct iovec __user *vec, 624 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 625 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 626 asmlinkage long compat_sys_preadv64(unsigned long fd, 627 const struct iovec __user *vec, 628 unsigned long vlen, loff_t pos); 629 #endif 630 631 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 632 asmlinkage long compat_sys_pwritev64(unsigned long fd, 633 const struct iovec __user *vec, 634 unsigned long vlen, loff_t pos); 635 #endif 636 637 /* fs/sendfile.c */ 638 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 639 compat_off_t __user *offset, compat_size_t count); 640 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 641 compat_loff_t __user *offset, compat_size_t count); 642 643 /* fs/select.c */ 644 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, 645 compat_ulong_t __user *outp, 646 compat_ulong_t __user *exp, 647 struct old_timespec32 __user *tsp, 648 void __user *sig); 649 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, 650 compat_ulong_t __user *outp, 651 compat_ulong_t __user *exp, 652 struct __kernel_timespec __user *tsp, 653 void __user *sig); 654 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, 655 unsigned int nfds, 656 struct old_timespec32 __user *tsp, 657 const compat_sigset_t __user *sigmask, 658 compat_size_t sigsetsize); 659 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, 660 unsigned int nfds, 661 struct __kernel_timespec __user *tsp, 662 const compat_sigset_t __user *sigmask, 663 compat_size_t sigsetsize); 664 665 /* fs/signalfd.c */ 666 asmlinkage long compat_sys_signalfd4(int ufd, 667 const compat_sigset_t __user *sigmask, 668 compat_size_t sigsetsize, int flags); 669 670 /* fs/stat.c */ 671 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 672 const char __user *filename, 673 struct compat_stat __user *statbuf, 674 int flag); 675 asmlinkage long compat_sys_newfstat(unsigned int fd, 676 struct compat_stat __user *statbuf); 677 678 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */ 679 680 /* kernel/exit.c */ 681 asmlinkage long compat_sys_waitid(int, compat_pid_t, 682 struct compat_siginfo __user *, int, 683 struct compat_rusage __user *); 684 685 686 687 /* kernel/futex.c */ 688 asmlinkage long 689 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 690 compat_size_t len); 691 asmlinkage long 692 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 693 compat_size_t __user *len_ptr); 694 695 /* kernel/itimer.c */ 696 asmlinkage long compat_sys_getitimer(int which, 697 struct old_itimerval32 __user *it); 698 asmlinkage long compat_sys_setitimer(int which, 699 struct old_itimerval32 __user *in, 700 struct old_itimerval32 __user *out); 701 702 /* kernel/kexec.c */ 703 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 704 compat_ulong_t nr_segments, 705 struct compat_kexec_segment __user *, 706 compat_ulong_t flags); 707 708 /* kernel/posix-timers.c */ 709 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 710 struct compat_sigevent __user *timer_event_spec, 711 timer_t __user *created_timer_id); 712 713 /* kernel/ptrace.c */ 714 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 715 compat_long_t addr, compat_long_t data); 716 717 /* kernel/sched/core.c */ 718 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 719 unsigned int len, 720 compat_ulong_t __user *user_mask_ptr); 721 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 722 unsigned int len, 723 compat_ulong_t __user *user_mask_ptr); 724 725 /* kernel/signal.c */ 726 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 727 compat_stack_t __user *uoss_ptr); 728 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 729 compat_size_t sigsetsize); 730 #ifndef CONFIG_ODD_RT_SIGACTION 731 asmlinkage long compat_sys_rt_sigaction(int, 732 const struct compat_sigaction __user *, 733 struct compat_sigaction __user *, 734 compat_size_t); 735 #endif 736 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 737 compat_sigset_t __user *oset, 738 compat_size_t sigsetsize); 739 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 740 compat_size_t sigsetsize); 741 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, 742 struct compat_siginfo __user *uinfo, 743 struct old_timespec32 __user *uts, compat_size_t sigsetsize); 744 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, 745 struct compat_siginfo __user *uinfo, 746 struct __kernel_timespec __user *uts, compat_size_t sigsetsize); 747 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 748 struct compat_siginfo __user *uinfo); 749 /* No generic prototype for rt_sigreturn */ 750 751 /* kernel/sys.c */ 752 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 753 asmlinkage long compat_sys_getrlimit(unsigned int resource, 754 struct compat_rlimit __user *rlim); 755 asmlinkage long compat_sys_setrlimit(unsigned int resource, 756 struct compat_rlimit __user *rlim); 757 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 758 759 /* kernel/time.c */ 760 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, 761 struct timezone __user *tz); 762 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, 763 struct timezone __user *tz); 764 765 /* kernel/timer.c */ 766 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 767 768 /* ipc/mqueue.c */ 769 asmlinkage long compat_sys_mq_open(const char __user *u_name, 770 int oflag, compat_mode_t mode, 771 struct compat_mq_attr __user *u_attr); 772 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 773 const struct compat_sigevent __user *u_notification); 774 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 775 const struct compat_mq_attr __user *u_mqstat, 776 struct compat_mq_attr __user *u_omqstat); 777 778 /* ipc/msg.c */ 779 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 780 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 781 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 782 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 783 compat_ssize_t msgsz, int msgflg); 784 785 /* ipc/sem.c */ 786 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 787 788 /* ipc/shm.c */ 789 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 790 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 791 792 /* net/socket.c */ 793 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 794 unsigned flags, struct sockaddr __user *addr, 795 int __user *addrlen); 796 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 797 unsigned flags); 798 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 799 unsigned int flags); 800 801 /* mm/filemap.c: No generic prototype for readahead */ 802 803 /* security/keys/keyctl.c */ 804 asmlinkage long compat_sys_keyctl(u32 option, 805 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 806 807 /* arch/example/kernel/sys_example.c */ 808 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 809 const compat_uptr_t __user *envp); 810 811 /* mm/fadvise.c: No generic prototype for fadvise64_64 */ 812 813 /* mm/, CONFIG_MMU only */ 814 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, 815 compat_ulong_t mode, 816 compat_ulong_t __user *nmask, 817 compat_ulong_t maxnode, compat_ulong_t flags); 818 asmlinkage long compat_sys_get_mempolicy(int __user *policy, 819 compat_ulong_t __user *nmask, 820 compat_ulong_t maxnode, 821 compat_ulong_t addr, 822 compat_ulong_t flags); 823 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask, 824 compat_ulong_t maxnode); 825 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, 826 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, 827 const compat_ulong_t __user *new_nodes); 828 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, 829 __u32 __user *pages, 830 const int __user *nodes, 831 int __user *status, 832 int flags); 833 834 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 835 compat_pid_t pid, int sig, 836 struct compat_siginfo __user *uinfo); 837 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, 838 unsigned vlen, unsigned int flags, 839 struct __kernel_timespec __user *timeout); 840 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, 841 unsigned vlen, unsigned int flags, 842 struct old_timespec32 __user *timeout); 843 asmlinkage long compat_sys_wait4(compat_pid_t pid, 844 compat_uint_t __user *stat_addr, int options, 845 struct compat_rusage __user *ru); 846 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 847 int, const char __user *); 848 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 849 struct file_handle __user *handle, 850 int flags); 851 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 852 unsigned vlen, unsigned int flags); 853 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 854 const compat_uptr_t __user *argv, 855 const compat_uptr_t __user *envp, int flags); 856 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 857 const struct iovec __user *vec, 858 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 859 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 860 const struct iovec __user *vec, 861 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 862 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 863 asmlinkage long compat_sys_preadv64v2(unsigned long fd, 864 const struct iovec __user *vec, 865 unsigned long vlen, loff_t pos, rwf_t flags); 866 #endif 867 868 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 869 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 870 const struct iovec __user *vec, 871 unsigned long vlen, loff_t pos, rwf_t flags); 872 #endif 873 874 875 /* 876 * Deprecated system calls which are still defined in 877 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 878 */ 879 880 /* __ARCH_WANT_SYSCALL_NO_AT */ 881 asmlinkage long compat_sys_open(const char __user *filename, int flags, 882 umode_t mode); 883 884 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 885 asmlinkage long compat_sys_signalfd(int ufd, 886 const compat_sigset_t __user *sigmask, 887 compat_size_t sigsetsize); 888 889 /* __ARCH_WANT_SYSCALL_OFF_T */ 890 asmlinkage long compat_sys_newstat(const char __user *filename, 891 struct compat_stat __user *statbuf); 892 asmlinkage long compat_sys_newlstat(const char __user *filename, 893 struct compat_stat __user *statbuf); 894 895 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 896 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 897 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 898 struct old_timeval32 __user *tvp); 899 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 900 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 901 unsigned flags); 902 903 /* obsolete: fs/readdir.c */ 904 asmlinkage long compat_sys_old_readdir(unsigned int fd, 905 struct compat_old_linux_dirent __user *, 906 unsigned int count); 907 908 /* obsolete: fs/select.c */ 909 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 910 911 /* obsolete: ipc */ 912 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 913 914 /* obsolete: kernel/signal.c */ 915 #ifdef __ARCH_WANT_SYS_SIGPENDING 916 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 917 #endif 918 919 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 920 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 921 compat_old_sigset_t __user *oset); 922 #endif 923 #ifdef CONFIG_COMPAT_OLD_SIGACTION 924 asmlinkage long compat_sys_sigaction(int sig, 925 const struct compat_old_sigaction __user *act, 926 struct compat_old_sigaction __user *oact); 927 #endif 928 929 /* obsolete: net/socket.c */ 930 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 931 932 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 933 934 935 /* 936 * For most but not all architectures, "am I in a compat syscall?" and 937 * "am I a compat task?" are the same question. For architectures on which 938 * they aren't the same question, arch code can override in_compat_syscall. 939 */ 940 941 #ifndef in_compat_syscall 942 static inline bool in_compat_syscall(void) { return is_compat_task(); } 943 #endif 944 945 /** 946 * ns_to_old_timeval32 - Compat version of ns_to_timeval 947 * @nsec: the nanoseconds value to be converted 948 * 949 * Returns the old_timeval32 representation of the nsec parameter. 950 */ 951 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 952 { 953 struct __kernel_old_timeval tv; 954 struct old_timeval32 ctv; 955 956 tv = ns_to_kernel_old_timeval(nsec); 957 ctv.tv_sec = tv.tv_sec; 958 ctv.tv_usec = tv.tv_usec; 959 960 return ctv; 961 } 962 963 /* 964 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) 965 * directly. Instead, use one of the functions which work equivalently, such 966 * as the kcompat_sys_xyzyyz() functions prototyped below. 967 */ 968 969 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, 970 struct compat_statfs64 __user * buf); 971 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 972 struct compat_statfs64 __user * buf); 973 974 #else /* !CONFIG_COMPAT */ 975 976 #define is_compat_task() (0) 977 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ 978 #define in_compat_syscall in_compat_syscall 979 static inline bool in_compat_syscall(void) { return false; } 980 981 #endif /* CONFIG_COMPAT */ 982 983 /* 984 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit 985 * types, and will need special compat treatment for that. Most architectures 986 * don't need that special handling even for compat syscalls. 987 */ 988 #ifndef compat_need_64bit_alignment_fixup 989 #define compat_need_64bit_alignment_fixup() false 990 #endif 991 992 /* 993 * A pointer passed in from user mode. This should not 994 * be used for syscall parameters, just declare them 995 * as pointers because the syscall entry code will have 996 * appropriately converted them already. 997 */ 998 #ifndef compat_ptr 999 static inline void __user *compat_ptr(compat_uptr_t uptr) 1000 { 1001 return (void __user *)(unsigned long)uptr; 1002 } 1003 #endif 1004 1005 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 1006 { 1007 return (u32)(unsigned long)uptr; 1008 } 1009 1010 #endif /* _LINUX_COMPAT_H */ 1011