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 #include <linux/error-injection.h> 22 23 #include <asm/compat.h> 24 #include <asm/siginfo.h> 25 #include <asm/signal.h> 26 27 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 28 /* 29 * It may be useful for an architecture to override the definitions of the 30 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular 31 * to use a different calling convention for syscalls. To allow for that, 32 + the prototypes for the compat_sys_*() functions below will *not* be included 33 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 34 */ 35 #include <asm/syscall_wrapper.h> 36 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 37 38 #ifndef COMPAT_USE_64BIT_TIME 39 #define COMPAT_USE_64BIT_TIME 0 40 #endif 41 42 #ifndef __SC_DELOUSE 43 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v)) 44 #endif 45 46 #ifndef COMPAT_SYSCALL_DEFINE0 47 #define COMPAT_SYSCALL_DEFINE0(name) \ 48 asmlinkage long compat_sys_##name(void); \ 49 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \ 50 asmlinkage long compat_sys_##name(void) 51 #endif /* COMPAT_SYSCALL_DEFINE0 */ 52 53 #define COMPAT_SYSCALL_DEFINE1(name, ...) \ 54 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) 55 #define COMPAT_SYSCALL_DEFINE2(name, ...) \ 56 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__) 57 #define COMPAT_SYSCALL_DEFINE3(name, ...) \ 58 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) 59 #define COMPAT_SYSCALL_DEFINE4(name, ...) \ 60 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__) 61 #define COMPAT_SYSCALL_DEFINE5(name, ...) \ 62 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__) 63 #define COMPAT_SYSCALL_DEFINE6(name, ...) \ 64 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__) 65 66 /* 67 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which 68 * sign-extends 32-bit ints to longs whenever needed. The actual work is 69 * done within __do_compat_sys_*(). 70 */ 71 #ifndef COMPAT_SYSCALL_DEFINEx 72 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \ 73 __diag_push(); \ 74 __diag_ignore(GCC, 8, "-Wattribute-alias", \ 75 "Type aliasing is used to sanitize syscall arguments");\ 76 __diag_ignore(clang, 23, "-Wunknown-warning-option", \ 77 "Avoid breaking versions without -Wattribute-alias"); \ 78 __diag_ignore(clang, 23, "-Wattribute-alias", \ 79 "Type aliasing is used to sanitize syscall arguments"); \ 80 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \ 81 __attribute__((alias(__stringify(__se_compat_sys##name)))); \ 82 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \ 83 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\ 84 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ 85 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 86 { \ 87 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\ 88 __MAP(x,__SC_TEST,__VA_ARGS__); \ 89 return ret; \ 90 } \ 91 __diag_pop(); \ 92 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) 93 #endif /* COMPAT_SYSCALL_DEFINEx */ 94 95 struct compat_iovec { 96 compat_uptr_t iov_base; 97 compat_size_t iov_len; 98 }; 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 u32 _flags; 242 } _perf; 243 }; 244 } _sigfault; 245 246 /* SIGPOLL */ 247 struct { 248 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 249 int _fd; 250 } _sigpoll; 251 252 struct { 253 compat_uptr_t _call_addr; /* calling user insn */ 254 int _syscall; /* triggering system call number */ 255 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 256 } _sigsys; 257 } _sifields; 258 } compat_siginfo_t; 259 260 struct compat_rlimit { 261 compat_ulong_t rlim_cur; 262 compat_ulong_t rlim_max; 263 }; 264 265 #ifdef __ARCH_NEED_COMPAT_FLOCK64_PACKED 266 #define __ARCH_COMPAT_FLOCK64_PACK __attribute__((packed)) 267 #else 268 #define __ARCH_COMPAT_FLOCK64_PACK 269 #endif 270 271 struct compat_flock { 272 short l_type; 273 short l_whence; 274 compat_off_t l_start; 275 compat_off_t l_len; 276 #ifdef __ARCH_COMPAT_FLOCK_EXTRA_SYSID 277 __ARCH_COMPAT_FLOCK_EXTRA_SYSID 278 #endif 279 compat_pid_t l_pid; 280 #ifdef __ARCH_COMPAT_FLOCK_PAD 281 __ARCH_COMPAT_FLOCK_PAD 282 #endif 283 }; 284 285 struct compat_flock64 { 286 short l_type; 287 short l_whence; 288 compat_loff_t l_start; 289 compat_loff_t l_len; 290 compat_pid_t l_pid; 291 #ifdef __ARCH_COMPAT_FLOCK64_PAD 292 __ARCH_COMPAT_FLOCK64_PAD 293 #endif 294 } __ARCH_COMPAT_FLOCK64_PACK; 295 296 struct compat_rusage { 297 struct old_timeval32 ru_utime; 298 struct old_timeval32 ru_stime; 299 compat_long_t ru_maxrss; 300 compat_long_t ru_ixrss; 301 compat_long_t ru_idrss; 302 compat_long_t ru_isrss; 303 compat_long_t ru_minflt; 304 compat_long_t ru_majflt; 305 compat_long_t ru_nswap; 306 compat_long_t ru_inblock; 307 compat_long_t ru_oublock; 308 compat_long_t ru_msgsnd; 309 compat_long_t ru_msgrcv; 310 compat_long_t ru_nsignals; 311 compat_long_t ru_nvcsw; 312 compat_long_t ru_nivcsw; 313 }; 314 315 extern int put_compat_rusage(const struct rusage *, 316 struct compat_rusage __user *); 317 318 struct compat_siginfo; 319 struct __compat_aio_sigset; 320 321 struct compat_dirent { 322 u32 d_ino; 323 compat_off_t d_off; 324 u16 d_reclen; 325 char d_name[256]; 326 }; 327 328 struct compat_ustat { 329 compat_daddr_t f_tfree; 330 compat_ino_t f_tinode; 331 char f_fname[6]; 332 char f_fpack[6]; 333 }; 334 335 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) 336 337 typedef struct compat_sigevent { 338 compat_sigval_t sigev_value; 339 compat_int_t sigev_signo; 340 compat_int_t sigev_notify; 341 union { 342 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE]; 343 compat_int_t _tid; 344 345 struct { 346 compat_uptr_t _function; 347 compat_uptr_t _attribute; 348 } _sigev_thread; 349 } _sigev_un; 350 } compat_sigevent_t; 351 352 struct compat_ifmap { 353 compat_ulong_t mem_start; 354 compat_ulong_t mem_end; 355 unsigned short base_addr; 356 unsigned char irq; 357 unsigned char dma; 358 unsigned char port; 359 }; 360 361 struct compat_if_settings { 362 unsigned int type; /* Type of physical device or protocol */ 363 unsigned int size; /* Size of the data allocated by the caller */ 364 compat_uptr_t ifs_ifsu; /* union of pointers */ 365 }; 366 367 struct compat_ifreq { 368 union { 369 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 370 } ifr_ifrn; 371 union { 372 struct sockaddr ifru_addr; 373 struct sockaddr ifru_dstaddr; 374 struct sockaddr ifru_broadaddr; 375 struct sockaddr ifru_netmask; 376 struct sockaddr ifru_hwaddr; 377 short ifru_flags; 378 compat_int_t ifru_ivalue; 379 compat_int_t ifru_mtu; 380 struct compat_ifmap ifru_map; 381 char ifru_slave[IFNAMSIZ]; /* Just fits the size */ 382 char ifru_newname[IFNAMSIZ]; 383 compat_caddr_t ifru_data; 384 struct compat_if_settings ifru_settings; 385 } ifr_ifru; 386 }; 387 388 struct compat_ifconf { 389 compat_int_t ifc_len; /* size of buffer */ 390 compat_caddr_t ifcbuf; 391 }; 392 393 struct compat_robust_list { 394 compat_uptr_t next; 395 }; 396 397 struct compat_robust_list_head { 398 struct compat_robust_list list; 399 compat_long_t futex_offset; 400 compat_uptr_t list_op_pending; 401 }; 402 403 #ifdef CONFIG_COMPAT_OLD_SIGACTION 404 struct compat_old_sigaction { 405 compat_uptr_t sa_handler; 406 compat_old_sigset_t sa_mask; 407 compat_ulong_t sa_flags; 408 compat_uptr_t sa_restorer; 409 }; 410 #endif 411 412 struct compat_keyctl_kdf_params { 413 compat_uptr_t hashname; 414 compat_uptr_t otherinfo; 415 __u32 otherinfolen; 416 __u32 __spare[8]; 417 }; 418 419 struct compat_stat; 420 struct compat_statfs; 421 struct compat_statfs64; 422 struct compat_old_linux_dirent; 423 struct compat_linux_dirent; 424 struct linux_dirent64; 425 struct compat_msghdr; 426 struct compat_mmsghdr; 427 struct compat_sysinfo; 428 struct compat_sysctl_args; 429 struct compat_kexec_segment; 430 struct compat_mq_attr; 431 struct compat_msgbuf; 432 433 void copy_siginfo_to_external32(struct compat_siginfo *to, 434 const struct kernel_siginfo *from); 435 int copy_siginfo_from_user32(kernel_siginfo_t *to, 436 const struct compat_siginfo __user *from); 437 int __copy_siginfo_to_user32(struct compat_siginfo __user *to, 438 const kernel_siginfo_t *from); 439 #ifndef copy_siginfo_to_user32 440 #define copy_siginfo_to_user32 __copy_siginfo_to_user32 441 #endif 442 int get_compat_sigevent(struct sigevent *event, 443 const struct compat_sigevent __user *u_event); 444 445 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat); 446 447 /* 448 * Defined inline such that size can be compile time constant, which avoids 449 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct 450 */ 451 static inline int 452 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set, 453 unsigned int size) 454 { 455 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */ 456 #if defined(__BIG_ENDIAN) && defined(CONFIG_64BIT) 457 compat_sigset_t v; 458 switch (_NSIG_WORDS) { 459 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3]; 460 fallthrough; 461 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2]; 462 fallthrough; 463 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1]; 464 fallthrough; 465 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0]; 466 } 467 return copy_to_user(compat, &v, size) ? -EFAULT : 0; 468 #else 469 return copy_to_user(compat, set, size) ? -EFAULT : 0; 470 #endif 471 } 472 473 #ifdef CONFIG_CPU_BIG_ENDIAN 474 #define unsafe_put_compat_sigset(compat, set, label) do { \ 475 compat_sigset_t __user *__c = compat; \ 476 const sigset_t *__s = set; \ 477 \ 478 switch (_NSIG_WORDS) { \ 479 case 4: \ 480 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \ 481 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \ 482 fallthrough; \ 483 case 3: \ 484 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \ 485 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \ 486 fallthrough; \ 487 case 2: \ 488 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \ 489 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \ 490 fallthrough; \ 491 case 1: \ 492 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \ 493 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \ 494 } \ 495 } while (0) 496 497 #define unsafe_get_compat_sigset(set, compat, label) do { \ 498 const compat_sigset_t __user *__c = compat; \ 499 compat_sigset_word hi, lo; \ 500 sigset_t *__s = set; \ 501 \ 502 switch (_NSIG_WORDS) { \ 503 case 4: \ 504 unsafe_get_user(lo, &__c->sig[7], label); \ 505 unsafe_get_user(hi, &__c->sig[6], label); \ 506 __s->sig[3] = hi | (((long)lo) << 32); \ 507 fallthrough; \ 508 case 3: \ 509 unsafe_get_user(lo, &__c->sig[5], label); \ 510 unsafe_get_user(hi, &__c->sig[4], label); \ 511 __s->sig[2] = hi | (((long)lo) << 32); \ 512 fallthrough; \ 513 case 2: \ 514 unsafe_get_user(lo, &__c->sig[3], label); \ 515 unsafe_get_user(hi, &__c->sig[2], label); \ 516 __s->sig[1] = hi | (((long)lo) << 32); \ 517 fallthrough; \ 518 case 1: \ 519 unsafe_get_user(lo, &__c->sig[1], label); \ 520 unsafe_get_user(hi, &__c->sig[0], label); \ 521 __s->sig[0] = hi | (((long)lo) << 32); \ 522 } \ 523 } while (0) 524 #else 525 #define unsafe_put_compat_sigset(compat, set, label) do { \ 526 compat_sigset_t __user *__c = compat; \ 527 const sigset_t *__s = set; \ 528 \ 529 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \ 530 } while (0) 531 532 #define unsafe_get_compat_sigset(set, compat, label) do { \ 533 const compat_sigset_t __user *__c = compat; \ 534 sigset_t *__s = set; \ 535 \ 536 unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \ 537 } while (0) 538 #endif 539 540 extern int compat_ptrace_request(struct task_struct *child, 541 compat_long_t request, 542 compat_ulong_t addr, compat_ulong_t data); 543 544 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 545 compat_ulong_t addr, compat_ulong_t data); 546 547 struct epoll_event; /* fortunately, this one is fixed-layout */ 548 549 int compat_restore_altstack(const compat_stack_t __user *uss); 550 int __compat_save_altstack(compat_stack_t __user *, unsigned long); 551 #define unsafe_compat_save_altstack(uss, sp, label) do { \ 552 compat_stack_t __user *__uss = uss; \ 553 struct task_struct *t = current; \ 554 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \ 555 &__uss->ss_sp, label); \ 556 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \ 557 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \ 558 } while (0); 559 560 /* 561 * These syscall function prototypes are kept in the same order as 562 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls 563 * go below. 564 * 565 * Please note that these prototypes here are only provided for information 566 * purposes, for static analysis, and for linking from the syscall table. 567 * These functions should not be called elsewhere from kernel code. 568 * 569 * As the syscall calling convention may be different from the default 570 * for architectures overriding the syscall calling convention, do not 571 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled. 572 */ 573 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER 574 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p); 575 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr, 576 u32 __user *iocb); 577 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, 578 compat_long_t min_nr, 579 compat_long_t nr, 580 struct io_event __user *events, 581 struct old_timespec32 __user *timeout, 582 const struct __compat_aio_sigset __user *usig); 583 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, 584 compat_long_t min_nr, 585 compat_long_t nr, 586 struct io_event __user *events, 587 struct __kernel_timespec __user *timeout, 588 const struct __compat_aio_sigset __user *usig); 589 asmlinkage long compat_sys_epoll_pwait(int epfd, 590 struct epoll_event __user *events, 591 int maxevents, int timeout, 592 const compat_sigset_t __user *sigmask, 593 compat_size_t sigsetsize); 594 asmlinkage long compat_sys_epoll_pwait2(int epfd, 595 struct epoll_event __user *events, 596 int maxevents, 597 const struct __kernel_timespec __user *timeout, 598 const compat_sigset_t __user *sigmask, 599 compat_size_t sigsetsize); 600 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, 601 compat_ulong_t arg); 602 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, 603 compat_ulong_t arg); 604 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, 605 compat_ulong_t arg); 606 asmlinkage long compat_sys_statfs(const char __user *pathname, 607 struct compat_statfs __user *buf); 608 asmlinkage long compat_sys_statfs64(const char __user *pathname, 609 compat_size_t sz, 610 struct compat_statfs64 __user *buf); 611 asmlinkage long compat_sys_fstatfs(unsigned int fd, 612 struct compat_statfs __user *buf); 613 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 614 struct compat_statfs64 __user *buf); 615 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t); 616 asmlinkage long compat_sys_ftruncate(unsigned int, compat_off_t); 617 /* No generic prototype for truncate64, ftruncate64, fallocate */ 618 asmlinkage long compat_sys_openat(int dfd, const char __user *filename, 619 int flags, umode_t mode); 620 asmlinkage long compat_sys_getdents(unsigned int fd, 621 struct compat_linux_dirent __user *dirent, 622 unsigned int count); 623 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int); 624 /* No generic prototype for pread64 and pwrite64 */ 625 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd, 626 const struct iovec __user *vec, 627 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 628 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd, 629 const struct iovec __user *vec, 630 compat_ulong_t vlen, u32 pos_low, u32 pos_high); 631 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64 632 asmlinkage long compat_sys_preadv64(unsigned long fd, 633 const struct iovec __user *vec, 634 unsigned long vlen, loff_t pos); 635 #endif 636 637 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64 638 asmlinkage long compat_sys_pwritev64(unsigned long fd, 639 const struct iovec __user *vec, 640 unsigned long vlen, loff_t pos); 641 #endif 642 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, 643 compat_off_t __user *offset, compat_size_t count); 644 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, 645 compat_loff_t __user *offset, compat_size_t count); 646 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp, 647 compat_ulong_t __user *outp, 648 compat_ulong_t __user *exp, 649 struct old_timespec32 __user *tsp, 650 void __user *sig); 651 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, 652 compat_ulong_t __user *outp, 653 compat_ulong_t __user *exp, 654 struct __kernel_timespec __user *tsp, 655 void __user *sig); 656 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds, 657 unsigned int nfds, 658 struct old_timespec32 __user *tsp, 659 const compat_sigset_t __user *sigmask, 660 compat_size_t sigsetsize); 661 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, 662 unsigned int nfds, 663 struct __kernel_timespec __user *tsp, 664 const compat_sigset_t __user *sigmask, 665 compat_size_t sigsetsize); 666 asmlinkage long compat_sys_signalfd4(int ufd, 667 const compat_sigset_t __user *sigmask, 668 compat_size_t sigsetsize, int flags); 669 asmlinkage long compat_sys_newfstatat(unsigned int dfd, 670 const char __user *filename, 671 struct compat_stat __user *statbuf, 672 int flag); 673 asmlinkage long compat_sys_newfstat(unsigned int fd, 674 struct compat_stat __user *statbuf); 675 /* No generic prototype for sync_file_range and sync_file_range2 */ 676 asmlinkage long compat_sys_waitid(int, compat_pid_t, 677 struct compat_siginfo __user *, int, 678 struct compat_rusage __user *); 679 asmlinkage long 680 compat_sys_set_robust_list(struct compat_robust_list_head __user *head, 681 compat_size_t len); 682 asmlinkage long 683 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, 684 compat_size_t __user *len_ptr); 685 asmlinkage long compat_sys_getitimer(int which, 686 struct old_itimerval32 __user *it); 687 asmlinkage long compat_sys_setitimer(int which, 688 struct old_itimerval32 __user *in, 689 struct old_itimerval32 __user *out); 690 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry, 691 compat_ulong_t nr_segments, 692 struct compat_kexec_segment __user *, 693 compat_ulong_t flags); 694 asmlinkage long compat_sys_timer_create(clockid_t which_clock, 695 struct compat_sigevent __user *timer_event_spec, 696 timer_t __user *created_timer_id); 697 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid, 698 compat_long_t addr, compat_long_t data); 699 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, 700 unsigned int len, 701 compat_ulong_t __user *user_mask_ptr); 702 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, 703 unsigned int len, 704 compat_ulong_t __user *user_mask_ptr); 705 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, 706 compat_stack_t __user *uoss_ptr); 707 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, 708 compat_size_t sigsetsize); 709 #ifndef CONFIG_ODD_RT_SIGACTION 710 asmlinkage long compat_sys_rt_sigaction(int, 711 const struct compat_sigaction __user *, 712 struct compat_sigaction __user *, 713 compat_size_t); 714 #endif 715 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, 716 compat_sigset_t __user *oset, 717 compat_size_t sigsetsize); 718 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, 719 compat_size_t sigsetsize); 720 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese, 721 struct compat_siginfo __user *uinfo, 722 struct old_timespec32 __user *uts, compat_size_t sigsetsize); 723 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, 724 struct compat_siginfo __user *uinfo, 725 struct __kernel_timespec __user *uts, compat_size_t sigsetsize); 726 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, 727 struct compat_siginfo __user *uinfo); 728 /* No generic prototype for rt_sigreturn */ 729 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf); 730 asmlinkage long compat_sys_getrlimit(unsigned int resource, 731 struct compat_rlimit __user *rlim); 732 asmlinkage long compat_sys_setrlimit(unsigned int resource, 733 struct compat_rlimit __user *rlim); 734 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru); 735 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv, 736 struct timezone __user *tz); 737 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv, 738 struct timezone __user *tz); 739 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); 740 asmlinkage long compat_sys_mq_open(const char __user *u_name, 741 int oflag, compat_mode_t mode, 742 struct compat_mq_attr __user *u_attr); 743 asmlinkage long compat_sys_mq_notify(mqd_t mqdes, 744 const struct compat_sigevent __user *u_notification); 745 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes, 746 const struct compat_mq_attr __user *u_mqstat, 747 struct compat_mq_attr __user *u_omqstat); 748 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr); 749 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp, 750 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg); 751 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp, 752 compat_ssize_t msgsz, int msgflg); 753 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg); 754 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr); 755 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); 756 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len, 757 unsigned flags, struct sockaddr __user *addr, 758 int __user *addrlen); 759 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, 760 unsigned flags); 761 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, 762 unsigned int flags); 763 /* No generic prototype for readahead */ 764 asmlinkage long compat_sys_keyctl(u32 option, 765 u32 arg2, u32 arg3, u32 arg4, u32 arg5); 766 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv, 767 const compat_uptr_t __user *envp); 768 /* No generic prototype for fadvise64_64 */ 769 /* CONFIG_MMU only */ 770 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, 771 compat_pid_t pid, int sig, 772 struct compat_siginfo __user *uinfo); 773 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, 774 unsigned vlen, unsigned int flags, 775 struct __kernel_timespec __user *timeout); 776 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg, 777 unsigned vlen, unsigned int flags, 778 struct old_timespec32 __user *timeout); 779 asmlinkage long compat_sys_wait4(compat_pid_t pid, 780 compat_uint_t __user *stat_addr, int options, 781 struct compat_rusage __user *ru); 782 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, 783 int, const char __user *); 784 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd, 785 struct file_handle __user *handle, 786 int flags); 787 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 788 unsigned vlen, unsigned int flags); 789 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename, 790 const compat_uptr_t __user *argv, 791 const compat_uptr_t __user *envp, int flags); 792 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd, 793 const struct iovec __user *vec, 794 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 795 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd, 796 const struct iovec __user *vec, 797 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags); 798 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 799 asmlinkage long compat_sys_preadv64v2(unsigned long fd, 800 const struct iovec __user *vec, 801 unsigned long vlen, loff_t pos, rwf_t flags); 802 #endif 803 804 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 805 asmlinkage long compat_sys_pwritev64v2(unsigned long fd, 806 const struct iovec __user *vec, 807 unsigned long vlen, loff_t pos, rwf_t flags); 808 #endif 809 810 811 /* 812 * Deprecated system calls which are still defined in 813 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch 814 */ 815 816 /* __ARCH_WANT_SYSCALL_NO_AT */ 817 asmlinkage long compat_sys_open(const char __user *filename, int flags, 818 umode_t mode); 819 820 /* __ARCH_WANT_SYSCALL_NO_FLAGS */ 821 asmlinkage long compat_sys_signalfd(int ufd, 822 const compat_sigset_t __user *sigmask, 823 compat_size_t sigsetsize); 824 825 /* __ARCH_WANT_SYSCALL_OFF_T */ 826 asmlinkage long compat_sys_newstat(const char __user *filename, 827 struct compat_stat __user *statbuf); 828 asmlinkage long compat_sys_newlstat(const char __user *filename, 829 struct compat_stat __user *statbuf); 830 831 /* __ARCH_WANT_SYSCALL_DEPRECATED */ 832 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, 833 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 834 struct old_timeval32 __user *tvp); 835 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32); 836 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len, 837 unsigned flags); 838 839 /* obsolete */ 840 asmlinkage long compat_sys_old_readdir(unsigned int fd, 841 struct compat_old_linux_dirent __user *, 842 unsigned int count); 843 844 /* obsolete */ 845 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg); 846 847 /* obsolete */ 848 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32); 849 850 /* obsolete */ 851 #ifdef __ARCH_WANT_SYS_SIGPENDING 852 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set); 853 #endif 854 855 #ifdef __ARCH_WANT_SYS_SIGPROCMASK 856 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset, 857 compat_old_sigset_t __user *oset); 858 #endif 859 #ifdef CONFIG_COMPAT_OLD_SIGACTION 860 asmlinkage long compat_sys_sigaction(int sig, 861 const struct compat_old_sigaction __user *act, 862 struct compat_old_sigaction __user *oact); 863 #endif 864 865 /* obsolete */ 866 asmlinkage long compat_sys_socketcall(int call, u32 __user *args); 867 868 #ifdef __ARCH_WANT_COMPAT_TRUNCATE64 869 asmlinkage long compat_sys_truncate64(const char __user *pathname, compat_arg_u64(len)); 870 #endif 871 872 #ifdef __ARCH_WANT_COMPAT_FTRUNCATE64 873 asmlinkage long compat_sys_ftruncate64(unsigned int fd, compat_arg_u64(len)); 874 #endif 875 876 #ifdef __ARCH_WANT_COMPAT_FALLOCATE 877 asmlinkage long compat_sys_fallocate(int fd, int mode, compat_arg_u64(offset), 878 compat_arg_u64(len)); 879 #endif 880 881 #ifdef __ARCH_WANT_COMPAT_PREAD64 882 asmlinkage long compat_sys_pread64(unsigned int fd, char __user *buf, size_t count, 883 compat_arg_u64(pos)); 884 #endif 885 886 #ifdef __ARCH_WANT_COMPAT_PWRITE64 887 asmlinkage long compat_sys_pwrite64(unsigned int fd, const char __user *buf, size_t count, 888 compat_arg_u64(pos)); 889 #endif 890 891 #ifdef __ARCH_WANT_COMPAT_SYNC_FILE_RANGE 892 asmlinkage long compat_sys_sync_file_range(int fd, compat_arg_u64(pos), 893 compat_arg_u64(nbytes), unsigned int flags); 894 #endif 895 896 #ifdef __ARCH_WANT_COMPAT_FADVISE64_64 897 asmlinkage long compat_sys_fadvise64_64(int fd, compat_arg_u64(pos), 898 compat_arg_u64(len), int advice); 899 #endif 900 901 #ifdef __ARCH_WANT_COMPAT_READAHEAD 902 asmlinkage long compat_sys_readahead(int fd, compat_arg_u64(offset), size_t count); 903 #endif 904 905 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ 906 907 /** 908 * ns_to_old_timeval32 - Compat version of ns_to_timeval 909 * @nsec: the nanoseconds value to be converted 910 * 911 * Returns the old_timeval32 representation of the nsec parameter. 912 */ 913 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec) 914 { 915 struct __kernel_old_timeval tv; 916 struct old_timeval32 ctv; 917 918 tv = ns_to_kernel_old_timeval(nsec); 919 ctv.tv_sec = tv.tv_sec; 920 ctv.tv_usec = tv.tv_usec; 921 922 return ctv; 923 } 924 925 /* 926 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz()) 927 * directly. Instead, use one of the functions which work equivalently, such 928 * as the kcompat_sys_xyzyyz() functions prototyped below. 929 */ 930 931 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz, 932 struct compat_statfs64 __user * buf); 933 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz, 934 struct compat_statfs64 __user * buf); 935 936 #ifdef CONFIG_COMPAT 937 938 /* 939 * For most but not all architectures, "am I in a compat syscall?" and 940 * "am I a compat task?" are the same question. For architectures on which 941 * they aren't the same question, arch code can override in_compat_syscall. 942 */ 943 #ifndef in_compat_syscall 944 static inline bool in_compat_syscall(void) { return is_compat_task(); } 945 #endif 946 947 #else /* !CONFIG_COMPAT */ 948 949 #define is_compat_task() (0) 950 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */ 951 #define in_compat_syscall in_compat_syscall 952 static inline bool in_compat_syscall(void) { return false; } 953 954 #endif /* CONFIG_COMPAT */ 955 956 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t)) 957 958 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG) 959 960 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, 961 unsigned long bitmap_size); 962 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, 963 unsigned long bitmap_size); 964 965 /* 966 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit 967 * types, and will need special compat treatment for that. Most architectures 968 * don't need that special handling even for compat syscalls. 969 */ 970 #ifndef compat_need_64bit_alignment_fixup 971 #define compat_need_64bit_alignment_fixup() false 972 #endif 973 974 /* 975 * A pointer passed in from user mode. This should not 976 * be used for syscall parameters, just declare them 977 * as pointers because the syscall entry code will have 978 * appropriately converted them already. 979 */ 980 #ifndef compat_ptr 981 static inline void __user *compat_ptr(compat_uptr_t uptr) 982 { 983 return (void __user *)(unsigned long)uptr; 984 } 985 #endif 986 987 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 988 { 989 return (u32)(unsigned long)uptr; 990 } 991 992 #endif /* _LINUX_COMPAT_H */ 993