1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_COMPAT_H
3 #define _LINUX_COMPAT_H
5 * These are the type definitions for the architecture specific
6 * syscall compatibility layer.
9 #include <linux/types.h>
10 #include <linux/time.h>
12 #include <linux/stat.h>
13 #include <linux/param.h> /* for HZ */
14 #include <linux/sem.h>
15 #include <linux/socket.h>
18 #include <linux/aio_abi.h> /* for aio_context_t */
19 #include <linux/uaccess.h>
20 #include <linux/unistd.h>
22 #include <asm/compat.h>
25 #include <asm/siginfo.h>
26 #include <asm/signal.h>
29 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
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.
37 #include <asm/syscall_wrapper.h>
38 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
40 #ifndef COMPAT_USE_64BIT_TIME
41 #define COMPAT_USE_64BIT_TIME 0
45 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
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 */
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__)
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_*().
73 #ifndef COMPAT_SYSCALL_DEFINEx
74 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
76 __diag_ignore(GCC, 8, "-Wattribute-alias", \
77 "Type aliasing is used to sanitize syscall arguments");\
78 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
79 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
80 __attribute__((alias(__stringify(__se_compat_sys##name)))); \
81 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \
82 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
83 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
84 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
86 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
87 __MAP(x,__SC_TEST,__VA_ARGS__); \
91 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
92 #endif /* COMPAT_SYSCALL_DEFINEx */
96 #ifndef compat_user_stack_pointer
97 #define compat_user_stack_pointer() current_user_stack_pointer()
99 #ifndef compat_sigaltstack /* we'll need that for MIPS */
100 typedef struct compat_sigaltstack {
103 compat_size_t ss_size;
106 #ifndef COMPAT_MINSIGSTKSZ
107 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ
110 #define compat_jiffies_to_clock_t(x) \
111 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
113 typedef __compat_uid32_t compat_uid_t;
114 typedef __compat_gid32_t compat_gid_t;
116 struct compat_sel_arg_struct;
119 struct compat_itimerval {
120 struct old_timeval32 it_interval;
121 struct old_timeval32 it_value;
125 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
126 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
129 compat_clock_t tms_utime;
130 compat_clock_t tms_stime;
131 compat_clock_t tms_cutime;
132 compat_clock_t tms_cstime;
135 struct compat_timex {
137 compat_long_t offset;
139 compat_long_t maxerror;
140 compat_long_t esterror;
142 compat_long_t constant;
143 compat_long_t precision;
144 compat_long_t tolerance;
145 struct old_timeval32 time;
147 compat_long_t ppsfreq;
148 compat_long_t jitter;
150 compat_long_t stabil;
151 compat_long_t jitcnt;
152 compat_long_t calcnt;
153 compat_long_t errcnt;
154 compat_long_t stbcnt;
157 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
158 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
159 compat_int_t:32; compat_int_t:32; compat_int_t:32;
163 int compat_get_timex(struct timex *, const struct compat_timex __user *);
164 int compat_put_timex(struct compat_timex __user *, const struct timex *);
166 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
169 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
172 struct compat_sigaction {
173 #ifndef __ARCH_HAS_IRIX_SIGACTION
174 compat_uptr_t sa_handler;
175 compat_ulong_t sa_flags;
177 compat_uint_t sa_flags;
178 compat_uptr_t sa_handler;
180 #ifdef __ARCH_HAS_SA_RESTORER
181 compat_uptr_t sa_restorer;
183 compat_sigset_t sa_mask __packed;
186 typedef union compat_sigval {
187 compat_int_t sival_int;
188 compat_uptr_t sival_ptr;
191 typedef struct compat_siginfo {
193 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
202 int _pad[128/sizeof(int) - 3];
206 compat_pid_t _pid; /* sender's pid */
207 __compat_uid32_t _uid; /* sender's uid */
210 /* POSIX.1b timers */
212 compat_timer_t _tid; /* timer id */
213 int _overrun; /* overrun count */
214 compat_sigval_t _sigval; /* same as below */
217 /* POSIX.1b signals */
219 compat_pid_t _pid; /* sender's pid */
220 __compat_uid32_t _uid; /* sender's uid */
221 compat_sigval_t _sigval;
226 compat_pid_t _pid; /* which child */
227 __compat_uid32_t _uid; /* sender's uid */
228 int _status; /* exit code */
229 compat_clock_t _utime;
230 compat_clock_t _stime;
233 #ifdef CONFIG_X86_X32_ABI
234 /* SIGCHLD (x32 version) */
236 compat_pid_t _pid; /* which child */
237 __compat_uid32_t _uid; /* sender's uid */
238 int _status; /* exit code */
244 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
246 compat_uptr_t _addr; /* faulting insn/memory ref. */
247 #ifdef __ARCH_SI_TRAPNO
248 int _trapno; /* TRAP # which caused the signal */
250 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
251 sizeof(short) : __alignof__(compat_uptr_t))
254 * used when si_code=BUS_MCEERR_AR or
255 * used when si_code=BUS_MCEERR_AO
257 short int _addr_lsb; /* Valid LSB of the reported address. */
258 /* used when si_code=SEGV_BNDERR */
260 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
261 compat_uptr_t _lower;
262 compat_uptr_t _upper;
264 /* used when si_code=SEGV_PKUERR */
266 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
274 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
279 compat_uptr_t _call_addr; /* calling user insn */
280 int _syscall; /* triggering system call number */
281 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
287 * These functions operate on 32- or 64-bit specs depending on
288 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
290 extern int compat_get_timespec(struct timespec *, const void __user *);
291 extern int compat_put_timespec(const struct timespec *, void __user *);
292 extern int compat_get_timeval(struct timeval *, const void __user *);
293 extern int compat_put_timeval(const struct timeval *, void __user *);
295 struct compat_iovec {
296 compat_uptr_t iov_base;
297 compat_size_t iov_len;
300 struct compat_rlimit {
301 compat_ulong_t rlim_cur;
302 compat_ulong_t rlim_max;
305 struct compat_rusage {
306 struct old_timeval32 ru_utime;
307 struct old_timeval32 ru_stime;
308 compat_long_t ru_maxrss;
309 compat_long_t ru_ixrss;
310 compat_long_t ru_idrss;
311 compat_long_t ru_isrss;
312 compat_long_t ru_minflt;
313 compat_long_t ru_majflt;
314 compat_long_t ru_nswap;
315 compat_long_t ru_inblock;
316 compat_long_t ru_oublock;
317 compat_long_t ru_msgsnd;
318 compat_long_t ru_msgrcv;
319 compat_long_t ru_nsignals;
320 compat_long_t ru_nvcsw;
321 compat_long_t ru_nivcsw;
324 extern int put_compat_rusage(const struct rusage *,
325 struct compat_rusage __user *);
327 struct compat_siginfo;
328 struct __compat_aio_sigset;
330 struct compat_dirent {
337 struct compat_ustat {
338 compat_daddr_t f_tfree;
339 compat_ino_t f_tinode;
344 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
346 typedef struct compat_sigevent {
347 compat_sigval_t sigev_value;
348 compat_int_t sigev_signo;
349 compat_int_t sigev_notify;
351 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
355 compat_uptr_t _function;
356 compat_uptr_t _attribute;
361 struct compat_ifmap {
362 compat_ulong_t mem_start;
363 compat_ulong_t mem_end;
364 unsigned short base_addr;
370 struct compat_if_settings {
371 unsigned int type; /* Type of physical device or protocol */
372 unsigned int size; /* Size of the data allocated by the caller */
373 compat_uptr_t ifs_ifsu; /* union of pointers */
376 struct compat_ifreq {
378 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
381 struct sockaddr ifru_addr;
382 struct sockaddr ifru_dstaddr;
383 struct sockaddr ifru_broadaddr;
384 struct sockaddr ifru_netmask;
385 struct sockaddr ifru_hwaddr;
387 compat_int_t ifru_ivalue;
388 compat_int_t ifru_mtu;
389 struct compat_ifmap ifru_map;
390 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
391 char ifru_newname[IFNAMSIZ];
392 compat_caddr_t ifru_data;
393 struct compat_if_settings ifru_settings;
397 struct compat_ifconf {
398 compat_int_t ifc_len; /* size of buffer */
399 compat_caddr_t ifcbuf;
402 struct compat_robust_list {
406 struct compat_robust_list_head {
407 struct compat_robust_list list;
408 compat_long_t futex_offset;
409 compat_uptr_t list_op_pending;
412 #ifdef CONFIG_COMPAT_OLD_SIGACTION
413 struct compat_old_sigaction {
414 compat_uptr_t sa_handler;
415 compat_old_sigset_t sa_mask;
416 compat_ulong_t sa_flags;
417 compat_uptr_t sa_restorer;
421 struct compat_keyctl_kdf_params {
422 compat_uptr_t hashname;
423 compat_uptr_t otherinfo;
428 struct compat_statfs;
429 struct compat_statfs64;
430 struct compat_old_linux_dirent;
431 struct compat_linux_dirent;
432 struct linux_dirent64;
433 struct compat_msghdr;
434 struct compat_mmsghdr;
435 struct compat_sysinfo;
436 struct compat_sysctl_args;
437 struct compat_kexec_segment;
438 struct compat_mq_attr;
439 struct compat_msgbuf;
441 extern void compat_exit_robust_list(struct task_struct *curr);
443 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
445 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
447 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
448 unsigned long bitmap_size);
449 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
450 unsigned long bitmap_size);
451 int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from);
452 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from);
453 int get_compat_sigevent(struct sigevent *event,
454 const struct compat_sigevent __user *u_event);
456 static inline int old_timeval32_compare(struct old_timeval32 *lhs,
457 struct old_timeval32 *rhs)
459 if (lhs->tv_sec < rhs->tv_sec)
461 if (lhs->tv_sec > rhs->tv_sec)
463 return lhs->tv_usec - rhs->tv_usec;
466 static inline int old_timespec32_compare(struct old_timespec32 *lhs,
467 struct old_timespec32 *rhs)
469 if (lhs->tv_sec < rhs->tv_sec)
471 if (lhs->tv_sec > rhs->tv_sec)
473 return lhs->tv_nsec - rhs->tv_nsec;
476 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
479 * Defined inline such that size can be compile time constant, which avoids
480 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
483 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
486 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
489 switch (_NSIG_WORDS) {
490 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
491 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
492 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
493 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
495 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
497 return copy_to_user(compat, set, size) ? -EFAULT : 0;
501 extern int compat_ptrace_request(struct task_struct *child,
502 compat_long_t request,
503 compat_ulong_t addr, compat_ulong_t data);
505 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
506 compat_ulong_t addr, compat_ulong_t data);
508 struct epoll_event; /* fortunately, this one is fixed-layout */
510 extern ssize_t compat_rw_copy_check_uvector(int type,
511 const struct compat_iovec __user *uvector,
512 unsigned long nr_segs,
513 unsigned long fast_segs, struct iovec *fast_pointer,
514 struct iovec **ret_pointer);
516 extern void __user *compat_alloc_user_space(unsigned long len);
518 int compat_restore_altstack(const compat_stack_t __user *uss);
519 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
520 #define compat_save_altstack_ex(uss, sp) do { \
521 compat_stack_t __user *__uss = uss; \
522 struct task_struct *t = current; \
523 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
524 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
525 put_user_ex(t->sas_ss_size, &__uss->ss_size); \
526 if (t->sas_ss_flags & SS_AUTODISARM) \
531 * These syscall function prototypes are kept in the same order as
532 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
535 * Please note that these prototypes here are only provided for information
536 * purposes, for static analysis, and for linking from the syscall table.
537 * These functions should not be called elsewhere from kernel code.
539 * As the syscall calling convention may be different from the default
540 * for architectures overriding the syscall calling convention, do not
541 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
543 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
544 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
545 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
547 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
548 compat_long_t min_nr,
550 struct io_event __user *events,
551 struct old_timespec32 __user *timeout);
552 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
553 compat_long_t min_nr,
555 struct io_event __user *events,
556 struct old_timespec32 __user *timeout,
557 const struct __compat_aio_sigset __user *usig);
560 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
563 asmlinkage long compat_sys_epoll_pwait(int epfd,
564 struct epoll_event __user *events,
565 int maxevents, int timeout,
566 const compat_sigset_t __user *sigmask,
567 compat_size_t sigsetsize);
570 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
572 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
576 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
580 asmlinkage long compat_sys_mount(const char __user *dev_name,
581 const char __user *dir_name,
582 const char __user *type, compat_ulong_t flags,
583 const void __user *data);
586 asmlinkage long compat_sys_statfs(const char __user *pathname,
587 struct compat_statfs __user *buf);
588 asmlinkage long compat_sys_statfs64(const char __user *pathname,
590 struct compat_statfs64 __user *buf);
591 asmlinkage long compat_sys_fstatfs(unsigned int fd,
592 struct compat_statfs __user *buf);
593 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
594 struct compat_statfs64 __user *buf);
595 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
596 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
597 /* No generic prototype for truncate64, ftruncate64, fallocate */
598 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
599 int flags, umode_t mode);
602 asmlinkage long compat_sys_getdents(unsigned int fd,
603 struct compat_linux_dirent __user *dirent,
606 /* fs/read_write.c */
607 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
608 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
609 const struct compat_iovec __user *vec, compat_ulong_t vlen);
610 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
611 const struct compat_iovec __user *vec, compat_ulong_t vlen);
612 /* No generic prototype for pread64 and pwrite64 */
613 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
614 const struct compat_iovec __user *vec,
615 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
616 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
617 const struct compat_iovec __user *vec,
618 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
619 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
620 asmlinkage long compat_sys_preadv64(unsigned long fd,
621 const struct compat_iovec __user *vec,
622 unsigned long vlen, loff_t pos);
625 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
626 asmlinkage long compat_sys_pwritev64(unsigned long fd,
627 const struct compat_iovec __user *vec,
628 unsigned long vlen, loff_t pos);
632 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
633 compat_off_t __user *offset, compat_size_t count);
634 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
635 compat_loff_t __user *offset, compat_size_t count);
638 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
639 compat_ulong_t __user *outp,
640 compat_ulong_t __user *exp,
641 struct old_timespec32 __user *tsp,
643 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
645 struct old_timespec32 __user *tsp,
646 const compat_sigset_t __user *sigmask,
647 compat_size_t sigsetsize);
650 asmlinkage long compat_sys_signalfd4(int ufd,
651 const compat_sigset_t __user *sigmask,
652 compat_size_t sigsetsize, int flags);
655 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
656 unsigned int nr_segs, unsigned int flags);
659 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
660 const char __user *filename,
661 struct compat_stat __user *statbuf,
663 asmlinkage long compat_sys_newfstat(unsigned int fd,
664 struct compat_stat __user *statbuf);
666 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
669 asmlinkage long compat_sys_timerfd_gettime(int ufd,
670 struct old_itimerspec32 __user *otmr);
671 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
672 const struct old_itimerspec32 __user *utmr,
673 struct old_itimerspec32 __user *otmr);
676 asmlinkage long compat_sys_utimensat(unsigned int dfd,
677 const char __user *filename,
678 struct old_timespec32 __user *t,
682 asmlinkage long compat_sys_waitid(int, compat_pid_t,
683 struct compat_siginfo __user *, int,
684 struct compat_rusage __user *);
689 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
690 struct old_timespec32 __user *utime, u32 __user *uaddr2,
693 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
696 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
697 compat_size_t __user *len_ptr);
699 /* kernel/hrtimer.c */
700 asmlinkage long compat_sys_nanosleep(struct old_timespec32 __user *rqtp,
701 struct old_timespec32 __user *rmtp);
703 /* kernel/itimer.c */
704 asmlinkage long compat_sys_getitimer(int which,
705 struct compat_itimerval __user *it);
706 asmlinkage long compat_sys_setitimer(int which,
707 struct compat_itimerval __user *in,
708 struct compat_itimerval __user *out);
711 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
712 compat_ulong_t nr_segments,
713 struct compat_kexec_segment __user *,
714 compat_ulong_t flags);
716 /* kernel/posix-timers.c */
717 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
718 struct compat_sigevent __user *timer_event_spec,
719 timer_t __user *created_timer_id);
720 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
721 struct old_itimerspec32 __user *setting);
722 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
723 struct old_itimerspec32 __user *new,
724 struct old_itimerspec32 __user *old);
725 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
726 struct old_timespec32 __user *tp);
727 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
728 struct old_timespec32 __user *tp);
729 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
730 struct old_timespec32 __user *tp);
731 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
732 struct old_timespec32 __user *rqtp,
733 struct old_timespec32 __user *rmtp);
735 /* kernel/ptrace.c */
736 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
737 compat_long_t addr, compat_long_t data);
739 /* kernel/sched/core.c */
740 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
742 compat_ulong_t __user *user_mask_ptr);
743 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
745 compat_ulong_t __user *user_mask_ptr);
746 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
747 struct old_timespec32 __user *interval);
749 /* kernel/signal.c */
750 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
751 compat_stack_t __user *uoss_ptr);
752 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
753 compat_size_t sigsetsize);
754 #ifndef CONFIG_ODD_RT_SIGACTION
755 asmlinkage long compat_sys_rt_sigaction(int,
756 const struct compat_sigaction __user *,
757 struct compat_sigaction __user *,
760 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
761 compat_sigset_t __user *oset,
762 compat_size_t sigsetsize);
763 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
764 compat_size_t sigsetsize);
765 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
766 struct compat_siginfo __user *uinfo,
767 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
768 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
769 struct compat_siginfo __user *uinfo);
770 /* No generic prototype for rt_sigreturn */
773 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
774 asmlinkage long compat_sys_getrlimit(unsigned int resource,
775 struct compat_rlimit __user *rlim);
776 asmlinkage long compat_sys_setrlimit(unsigned int resource,
777 struct compat_rlimit __user *rlim);
778 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
781 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
782 struct timezone __user *tz);
783 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
784 struct timezone __user *tz);
785 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
788 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
791 asmlinkage long compat_sys_mq_open(const char __user *u_name,
792 int oflag, compat_mode_t mode,
793 struct compat_mq_attr __user *u_attr);
794 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
795 const char __user *u_msg_ptr,
796 compat_size_t msg_len, unsigned int msg_prio,
797 const struct old_timespec32 __user *u_abs_timeout);
798 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
799 char __user *u_msg_ptr,
800 compat_size_t msg_len, unsigned int __user *u_msg_prio,
801 const struct old_timespec32 __user *u_abs_timeout);
802 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
803 const struct compat_sigevent __user *u_notification);
804 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
805 const struct compat_mq_attr __user *u_mqstat,
806 struct compat_mq_attr __user *u_omqstat);
809 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
810 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
811 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
812 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
813 compat_ssize_t msgsz, int msgflg);
816 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
817 asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
818 unsigned nsems, const struct old_timespec32 __user *timeout);
821 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
822 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
825 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
826 unsigned flags, struct sockaddr __user *addr,
827 int __user *addrlen);
828 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
829 char __user *optval, unsigned int optlen);
830 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
831 char __user *optval, int __user *optlen);
832 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
834 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
837 /* mm/filemap.c: No generic prototype for readahead */
839 /* security/keys/keyctl.c */
840 asmlinkage long compat_sys_keyctl(u32 option,
841 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
843 /* arch/example/kernel/sys_example.c */
844 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
845 const compat_uptr_t __user *envp);
847 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
849 /* mm/, CONFIG_MMU only */
850 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
852 compat_ulong_t __user *nmask,
853 compat_ulong_t maxnode, compat_ulong_t flags);
854 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
855 compat_ulong_t __user *nmask,
856 compat_ulong_t maxnode,
858 compat_ulong_t flags);
859 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
860 compat_ulong_t maxnode);
861 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
862 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
863 const compat_ulong_t __user *new_nodes);
864 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
866 const int __user *nodes,
870 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
871 compat_pid_t pid, int sig,
872 struct compat_siginfo __user *uinfo);
873 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
874 unsigned vlen, unsigned int flags,
875 struct old_timespec32 __user *timeout);
876 asmlinkage long compat_sys_wait4(compat_pid_t pid,
877 compat_uint_t __user *stat_addr, int options,
878 struct compat_rusage __user *ru);
879 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
880 int, const char __user *);
881 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
882 struct file_handle __user *handle,
884 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
885 struct compat_timex __user *tp);
886 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
887 unsigned vlen, unsigned int flags);
888 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
889 const struct compat_iovec __user *lvec,
890 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
891 compat_ulong_t riovcnt, compat_ulong_t flags);
892 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
893 const struct compat_iovec __user *lvec,
894 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
895 compat_ulong_t riovcnt, compat_ulong_t flags);
896 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
897 const compat_uptr_t __user *argv,
898 const compat_uptr_t __user *envp, int flags);
899 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
900 const struct compat_iovec __user *vec,
901 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
902 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
903 const struct compat_iovec __user *vec,
904 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
905 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
906 asmlinkage long compat_sys_readv64v2(unsigned long fd,
907 const struct compat_iovec __user *vec,
908 unsigned long vlen, loff_t pos, rwf_t flags);
911 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
912 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
913 const struct compat_iovec __user *vec,
914 unsigned long vlen, loff_t pos, rwf_t flags);
919 * Deprecated system calls which are still defined in
920 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
923 /* __ARCH_WANT_SYSCALL_NO_AT */
924 asmlinkage long compat_sys_open(const char __user *filename, int flags,
926 asmlinkage long compat_sys_utimes(const char __user *filename,
927 struct old_timeval32 __user *t);
929 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
930 asmlinkage long compat_sys_signalfd(int ufd,
931 const compat_sigset_t __user *sigmask,
932 compat_size_t sigsetsize);
934 /* __ARCH_WANT_SYSCALL_OFF_T */
935 asmlinkage long compat_sys_newstat(const char __user *filename,
936 struct compat_stat __user *statbuf);
937 asmlinkage long compat_sys_newlstat(const char __user *filename,
938 struct compat_stat __user *statbuf);
940 /* __ARCH_WANT_SYSCALL_DEPRECATED */
941 asmlinkage long compat_sys_time(old_time32_t __user *tloc);
942 asmlinkage long compat_sys_utime(const char __user *filename,
943 struct old_utimbuf32 __user *t);
944 asmlinkage long compat_sys_futimesat(unsigned int dfd,
945 const char __user *filename,
946 struct old_timeval32 __user *t);
947 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
948 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
949 struct old_timeval32 __user *tvp);
950 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
951 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
953 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
955 /* obsolete: fs/readdir.c */
956 asmlinkage long compat_sys_old_readdir(unsigned int fd,
957 struct compat_old_linux_dirent __user *,
960 /* obsolete: fs/select.c */
961 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
964 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
966 /* obsolete: kernel/signal.c */
967 #ifdef __ARCH_WANT_SYS_SIGPENDING
968 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
971 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
972 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
973 compat_old_sigset_t __user *oset);
975 #ifdef CONFIG_COMPAT_OLD_SIGACTION
976 asmlinkage long compat_sys_sigaction(int sig,
977 const struct compat_old_sigaction __user *act,
978 struct compat_old_sigaction __user *oact);
981 /* obsolete: kernel/time/time.c */
982 asmlinkage long compat_sys_stime(old_time32_t __user *tptr);
984 /* obsolete: net/socket.c */
985 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
987 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
991 * For most but not all architectures, "am I in a compat syscall?" and
992 * "am I a compat task?" are the same question. For architectures on which
993 * they aren't the same question, arch code can override in_compat_syscall.
996 #ifndef in_compat_syscall
997 static inline bool in_compat_syscall(void) { return is_compat_task(); }
1001 * ns_to_old_timeval32 - Compat version of ns_to_timeval
1002 * @nsec: the nanoseconds value to be converted
1004 * Returns the old_timeval32 representation of the nsec parameter.
1006 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
1009 struct old_timeval32 ctv;
1011 tv = ns_to_timeval(nsec);
1012 ctv.tv_sec = tv.tv_sec;
1013 ctv.tv_usec = tv.tv_usec;
1019 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
1020 * directly. Instead, use one of the functions which work equivalently, such
1021 * as the kcompat_sys_xyzyyz() functions prototyped below.
1024 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
1025 struct compat_statfs64 __user * buf);
1026 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
1027 struct compat_statfs64 __user * buf);
1029 #else /* !CONFIG_COMPAT */
1031 #define is_compat_task() (0)
1032 #ifndef in_compat_syscall
1033 static inline bool in_compat_syscall(void) { return false; }
1036 #endif /* CONFIG_COMPAT */
1038 #endif /* _LINUX_COMPAT_H */