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 int set_compat_user_sigmask(const compat_sigset_t __user *usigmask,
173 sigset_t *set, sigset_t *oldset,
176 struct compat_sigaction {
177 #ifndef __ARCH_HAS_IRIX_SIGACTION
178 compat_uptr_t sa_handler;
179 compat_ulong_t sa_flags;
181 compat_uint_t sa_flags;
182 compat_uptr_t sa_handler;
184 #ifdef __ARCH_HAS_SA_RESTORER
185 compat_uptr_t sa_restorer;
187 compat_sigset_t sa_mask __packed;
190 typedef union compat_sigval {
191 compat_int_t sival_int;
192 compat_uptr_t sival_ptr;
195 typedef struct compat_siginfo {
197 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
206 int _pad[128/sizeof(int) - 3];
210 compat_pid_t _pid; /* sender's pid */
211 __compat_uid32_t _uid; /* sender's uid */
214 /* POSIX.1b timers */
216 compat_timer_t _tid; /* timer id */
217 int _overrun; /* overrun count */
218 compat_sigval_t _sigval; /* same as below */
221 /* POSIX.1b signals */
223 compat_pid_t _pid; /* sender's pid */
224 __compat_uid32_t _uid; /* sender's uid */
225 compat_sigval_t _sigval;
230 compat_pid_t _pid; /* which child */
231 __compat_uid32_t _uid; /* sender's uid */
232 int _status; /* exit code */
233 compat_clock_t _utime;
234 compat_clock_t _stime;
237 #ifdef CONFIG_X86_X32_ABI
238 /* SIGCHLD (x32 version) */
240 compat_pid_t _pid; /* which child */
241 __compat_uid32_t _uid; /* sender's uid */
242 int _status; /* exit code */
248 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
250 compat_uptr_t _addr; /* faulting insn/memory ref. */
251 #ifdef __ARCH_SI_TRAPNO
252 int _trapno; /* TRAP # which caused the signal */
254 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
255 sizeof(short) : __alignof__(compat_uptr_t))
258 * used when si_code=BUS_MCEERR_AR or
259 * used when si_code=BUS_MCEERR_AO
261 short int _addr_lsb; /* Valid LSB of the reported address. */
262 /* used when si_code=SEGV_BNDERR */
264 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
265 compat_uptr_t _lower;
266 compat_uptr_t _upper;
268 /* used when si_code=SEGV_PKUERR */
270 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
278 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
283 compat_uptr_t _call_addr; /* calling user insn */
284 int _syscall; /* triggering system call number */
285 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
291 * These functions operate on 32- or 64-bit specs depending on
292 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
294 extern int compat_get_timespec(struct timespec *, const void __user *);
295 extern int compat_put_timespec(const struct timespec *, void __user *);
296 extern int compat_get_timeval(struct timeval *, const void __user *);
297 extern int compat_put_timeval(const struct timeval *, void __user *);
299 struct compat_iovec {
300 compat_uptr_t iov_base;
301 compat_size_t iov_len;
304 struct compat_rlimit {
305 compat_ulong_t rlim_cur;
306 compat_ulong_t rlim_max;
309 struct compat_rusage {
310 struct old_timeval32 ru_utime;
311 struct old_timeval32 ru_stime;
312 compat_long_t ru_maxrss;
313 compat_long_t ru_ixrss;
314 compat_long_t ru_idrss;
315 compat_long_t ru_isrss;
316 compat_long_t ru_minflt;
317 compat_long_t ru_majflt;
318 compat_long_t ru_nswap;
319 compat_long_t ru_inblock;
320 compat_long_t ru_oublock;
321 compat_long_t ru_msgsnd;
322 compat_long_t ru_msgrcv;
323 compat_long_t ru_nsignals;
324 compat_long_t ru_nvcsw;
325 compat_long_t ru_nivcsw;
328 extern int put_compat_rusage(const struct rusage *,
329 struct compat_rusage __user *);
331 struct compat_siginfo;
332 struct __compat_aio_sigset;
334 struct compat_dirent {
341 struct compat_ustat {
342 compat_daddr_t f_tfree;
343 compat_ino_t f_tinode;
348 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
350 typedef struct compat_sigevent {
351 compat_sigval_t sigev_value;
352 compat_int_t sigev_signo;
353 compat_int_t sigev_notify;
355 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
359 compat_uptr_t _function;
360 compat_uptr_t _attribute;
365 struct compat_ifmap {
366 compat_ulong_t mem_start;
367 compat_ulong_t mem_end;
368 unsigned short base_addr;
374 struct compat_if_settings {
375 unsigned int type; /* Type of physical device or protocol */
376 unsigned int size; /* Size of the data allocated by the caller */
377 compat_uptr_t ifs_ifsu; /* union of pointers */
380 struct compat_ifreq {
382 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
385 struct sockaddr ifru_addr;
386 struct sockaddr ifru_dstaddr;
387 struct sockaddr ifru_broadaddr;
388 struct sockaddr ifru_netmask;
389 struct sockaddr ifru_hwaddr;
391 compat_int_t ifru_ivalue;
392 compat_int_t ifru_mtu;
393 struct compat_ifmap ifru_map;
394 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
395 char ifru_newname[IFNAMSIZ];
396 compat_caddr_t ifru_data;
397 struct compat_if_settings ifru_settings;
401 struct compat_ifconf {
402 compat_int_t ifc_len; /* size of buffer */
403 compat_caddr_t ifcbuf;
406 struct compat_robust_list {
410 struct compat_robust_list_head {
411 struct compat_robust_list list;
412 compat_long_t futex_offset;
413 compat_uptr_t list_op_pending;
416 #ifdef CONFIG_COMPAT_OLD_SIGACTION
417 struct compat_old_sigaction {
418 compat_uptr_t sa_handler;
419 compat_old_sigset_t sa_mask;
420 compat_ulong_t sa_flags;
421 compat_uptr_t sa_restorer;
425 struct compat_keyctl_kdf_params {
426 compat_uptr_t hashname;
427 compat_uptr_t otherinfo;
432 struct compat_statfs;
433 struct compat_statfs64;
434 struct compat_old_linux_dirent;
435 struct compat_linux_dirent;
436 struct linux_dirent64;
437 struct compat_msghdr;
438 struct compat_mmsghdr;
439 struct compat_sysinfo;
440 struct compat_sysctl_args;
441 struct compat_kexec_segment;
442 struct compat_mq_attr;
443 struct compat_msgbuf;
445 extern void compat_exit_robust_list(struct task_struct *curr);
447 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
449 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
451 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
452 unsigned long bitmap_size);
453 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
454 unsigned long bitmap_size);
455 int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from);
456 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from);
457 int get_compat_sigevent(struct sigevent *event,
458 const struct compat_sigevent __user *u_event);
460 static inline int old_timeval32_compare(struct old_timeval32 *lhs,
461 struct old_timeval32 *rhs)
463 if (lhs->tv_sec < rhs->tv_sec)
465 if (lhs->tv_sec > rhs->tv_sec)
467 return lhs->tv_usec - rhs->tv_usec;
470 static inline int old_timespec32_compare(struct old_timespec32 *lhs,
471 struct old_timespec32 *rhs)
473 if (lhs->tv_sec < rhs->tv_sec)
475 if (lhs->tv_sec > rhs->tv_sec)
477 return lhs->tv_nsec - rhs->tv_nsec;
480 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
483 * Defined inline such that size can be compile time constant, which avoids
484 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
487 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
490 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
493 switch (_NSIG_WORDS) {
494 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
496 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
498 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
500 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
502 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
504 return copy_to_user(compat, set, size) ? -EFAULT : 0;
508 extern int compat_ptrace_request(struct task_struct *child,
509 compat_long_t request,
510 compat_ulong_t addr, compat_ulong_t data);
512 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
513 compat_ulong_t addr, compat_ulong_t data);
515 struct epoll_event; /* fortunately, this one is fixed-layout */
517 extern ssize_t compat_rw_copy_check_uvector(int type,
518 const struct compat_iovec __user *uvector,
519 unsigned long nr_segs,
520 unsigned long fast_segs, struct iovec *fast_pointer,
521 struct iovec **ret_pointer);
523 extern void __user *compat_alloc_user_space(unsigned long len);
525 int compat_restore_altstack(const compat_stack_t __user *uss);
526 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
527 #define compat_save_altstack_ex(uss, sp) do { \
528 compat_stack_t __user *__uss = uss; \
529 struct task_struct *t = current; \
530 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
531 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
532 put_user_ex(t->sas_ss_size, &__uss->ss_size); \
533 if (t->sas_ss_flags & SS_AUTODISARM) \
538 * These syscall function prototypes are kept in the same order as
539 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
542 * Please note that these prototypes here are only provided for information
543 * purposes, for static analysis, and for linking from the syscall table.
544 * These functions should not be called elsewhere from kernel code.
546 * As the syscall calling convention may be different from the default
547 * for architectures overriding the syscall calling convention, do not
548 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
550 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
551 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
552 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
554 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
555 compat_long_t min_nr,
557 struct io_event __user *events,
558 struct old_timespec32 __user *timeout);
559 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
560 compat_long_t min_nr,
562 struct io_event __user *events,
563 struct old_timespec32 __user *timeout,
564 const struct __compat_aio_sigset __user *usig);
565 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
566 compat_long_t min_nr,
568 struct io_event __user *events,
569 struct __kernel_timespec __user *timeout,
570 const struct __compat_aio_sigset __user *usig);
573 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
576 asmlinkage long compat_sys_epoll_pwait(int epfd,
577 struct epoll_event __user *events,
578 int maxevents, int timeout,
579 const compat_sigset_t __user *sigmask,
580 compat_size_t sigsetsize);
583 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
585 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
589 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
593 asmlinkage long compat_sys_mount(const char __user *dev_name,
594 const char __user *dir_name,
595 const char __user *type, compat_ulong_t flags,
596 const void __user *data);
599 asmlinkage long compat_sys_statfs(const char __user *pathname,
600 struct compat_statfs __user *buf);
601 asmlinkage long compat_sys_statfs64(const char __user *pathname,
603 struct compat_statfs64 __user *buf);
604 asmlinkage long compat_sys_fstatfs(unsigned int fd,
605 struct compat_statfs __user *buf);
606 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
607 struct compat_statfs64 __user *buf);
608 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
609 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
610 /* No generic prototype for truncate64, ftruncate64, fallocate */
611 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
612 int flags, umode_t mode);
615 asmlinkage long compat_sys_getdents(unsigned int fd,
616 struct compat_linux_dirent __user *dirent,
619 /* fs/read_write.c */
620 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
621 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
622 const struct compat_iovec __user *vec, compat_ulong_t vlen);
623 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
624 const struct compat_iovec __user *vec, compat_ulong_t vlen);
625 /* No generic prototype for pread64 and pwrite64 */
626 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
627 const struct compat_iovec __user *vec,
628 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
629 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
630 const struct compat_iovec __user *vec,
631 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
632 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
633 asmlinkage long compat_sys_preadv64(unsigned long fd,
634 const struct compat_iovec __user *vec,
635 unsigned long vlen, loff_t pos);
638 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
639 asmlinkage long compat_sys_pwritev64(unsigned long fd,
640 const struct compat_iovec __user *vec,
641 unsigned long vlen, loff_t pos);
645 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
646 compat_off_t __user *offset, compat_size_t count);
647 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
648 compat_loff_t __user *offset, compat_size_t count);
651 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
652 compat_ulong_t __user *outp,
653 compat_ulong_t __user *exp,
654 struct old_timespec32 __user *tsp,
656 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
657 compat_ulong_t __user *outp,
658 compat_ulong_t __user *exp,
659 struct __kernel_timespec __user *tsp,
661 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
663 struct old_timespec32 __user *tsp,
664 const compat_sigset_t __user *sigmask,
665 compat_size_t sigsetsize);
666 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
668 struct __kernel_timespec __user *tsp,
669 const compat_sigset_t __user *sigmask,
670 compat_size_t sigsetsize);
673 asmlinkage long compat_sys_signalfd4(int ufd,
674 const compat_sigset_t __user *sigmask,
675 compat_size_t sigsetsize, int flags);
678 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
679 unsigned int nr_segs, unsigned int flags);
682 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
683 const char __user *filename,
684 struct compat_stat __user *statbuf,
686 asmlinkage long compat_sys_newfstat(unsigned int fd,
687 struct compat_stat __user *statbuf);
689 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
692 asmlinkage long compat_sys_timerfd_gettime(int ufd,
693 struct old_itimerspec32 __user *otmr);
694 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
695 const struct old_itimerspec32 __user *utmr,
696 struct old_itimerspec32 __user *otmr);
699 asmlinkage long compat_sys_utimensat(unsigned int dfd,
700 const char __user *filename,
701 struct old_timespec32 __user *t,
705 asmlinkage long compat_sys_waitid(int, compat_pid_t,
706 struct compat_siginfo __user *, int,
707 struct compat_rusage __user *);
712 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
713 struct old_timespec32 __user *utime, u32 __user *uaddr2,
716 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
719 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
720 compat_size_t __user *len_ptr);
722 /* kernel/hrtimer.c */
723 asmlinkage long compat_sys_nanosleep(struct old_timespec32 __user *rqtp,
724 struct old_timespec32 __user *rmtp);
726 /* kernel/itimer.c */
727 asmlinkage long compat_sys_getitimer(int which,
728 struct compat_itimerval __user *it);
729 asmlinkage long compat_sys_setitimer(int which,
730 struct compat_itimerval __user *in,
731 struct compat_itimerval __user *out);
734 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
735 compat_ulong_t nr_segments,
736 struct compat_kexec_segment __user *,
737 compat_ulong_t flags);
739 /* kernel/posix-timers.c */
740 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
741 struct compat_sigevent __user *timer_event_spec,
742 timer_t __user *created_timer_id);
743 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
744 struct old_itimerspec32 __user *setting);
745 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
746 struct old_itimerspec32 __user *new,
747 struct old_itimerspec32 __user *old);
748 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
749 struct old_timespec32 __user *tp);
750 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
751 struct old_timespec32 __user *tp);
752 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
753 struct old_timespec32 __user *tp);
754 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
755 struct old_timespec32 __user *rqtp,
756 struct old_timespec32 __user *rmtp);
758 /* kernel/ptrace.c */
759 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
760 compat_long_t addr, compat_long_t data);
762 /* kernel/sched/core.c */
763 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
765 compat_ulong_t __user *user_mask_ptr);
766 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
768 compat_ulong_t __user *user_mask_ptr);
769 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
770 struct old_timespec32 __user *interval);
772 /* kernel/signal.c */
773 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
774 compat_stack_t __user *uoss_ptr);
775 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
776 compat_size_t sigsetsize);
777 #ifndef CONFIG_ODD_RT_SIGACTION
778 asmlinkage long compat_sys_rt_sigaction(int,
779 const struct compat_sigaction __user *,
780 struct compat_sigaction __user *,
783 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
784 compat_sigset_t __user *oset,
785 compat_size_t sigsetsize);
786 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
787 compat_size_t sigsetsize);
788 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
789 struct compat_siginfo __user *uinfo,
790 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
791 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
792 struct compat_siginfo __user *uinfo,
793 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
794 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
795 struct compat_siginfo __user *uinfo);
796 /* No generic prototype for rt_sigreturn */
799 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
800 asmlinkage long compat_sys_getrlimit(unsigned int resource,
801 struct compat_rlimit __user *rlim);
802 asmlinkage long compat_sys_setrlimit(unsigned int resource,
803 struct compat_rlimit __user *rlim);
804 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
807 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
808 struct timezone __user *tz);
809 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
810 struct timezone __user *tz);
811 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
814 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
817 asmlinkage long compat_sys_mq_open(const char __user *u_name,
818 int oflag, compat_mode_t mode,
819 struct compat_mq_attr __user *u_attr);
820 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
821 const char __user *u_msg_ptr,
822 compat_size_t msg_len, unsigned int msg_prio,
823 const struct old_timespec32 __user *u_abs_timeout);
824 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
825 char __user *u_msg_ptr,
826 compat_size_t msg_len, unsigned int __user *u_msg_prio,
827 const struct old_timespec32 __user *u_abs_timeout);
828 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
829 const struct compat_sigevent __user *u_notification);
830 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
831 const struct compat_mq_attr __user *u_mqstat,
832 struct compat_mq_attr __user *u_omqstat);
835 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
836 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
837 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
838 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
839 compat_ssize_t msgsz, int msgflg);
842 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
843 asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
844 unsigned nsems, const struct old_timespec32 __user *timeout);
847 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
848 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
851 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
852 unsigned flags, struct sockaddr __user *addr,
853 int __user *addrlen);
854 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
855 char __user *optval, unsigned int optlen);
856 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
857 char __user *optval, int __user *optlen);
858 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
860 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
863 /* mm/filemap.c: No generic prototype for readahead */
865 /* security/keys/keyctl.c */
866 asmlinkage long compat_sys_keyctl(u32 option,
867 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
869 /* arch/example/kernel/sys_example.c */
870 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
871 const compat_uptr_t __user *envp);
873 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
875 /* mm/, CONFIG_MMU only */
876 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
878 compat_ulong_t __user *nmask,
879 compat_ulong_t maxnode, compat_ulong_t flags);
880 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
881 compat_ulong_t __user *nmask,
882 compat_ulong_t maxnode,
884 compat_ulong_t flags);
885 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
886 compat_ulong_t maxnode);
887 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
888 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
889 const compat_ulong_t __user *new_nodes);
890 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
892 const int __user *nodes,
896 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
897 compat_pid_t pid, int sig,
898 struct compat_siginfo __user *uinfo);
899 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
900 unsigned vlen, unsigned int flags,
901 struct __kernel_timespec __user *timeout);
902 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
903 unsigned vlen, unsigned int flags,
904 struct old_timespec32 __user *timeout);
905 asmlinkage long compat_sys_wait4(compat_pid_t pid,
906 compat_uint_t __user *stat_addr, int options,
907 struct compat_rusage __user *ru);
908 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
909 int, const char __user *);
910 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
911 struct file_handle __user *handle,
913 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
914 struct compat_timex __user *tp);
915 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
916 unsigned vlen, unsigned int flags);
917 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
918 const struct compat_iovec __user *lvec,
919 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
920 compat_ulong_t riovcnt, compat_ulong_t flags);
921 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
922 const struct compat_iovec __user *lvec,
923 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
924 compat_ulong_t riovcnt, compat_ulong_t flags);
925 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
926 const compat_uptr_t __user *argv,
927 const compat_uptr_t __user *envp, int flags);
928 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
929 const struct compat_iovec __user *vec,
930 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
931 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
932 const struct compat_iovec __user *vec,
933 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
934 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
935 asmlinkage long compat_sys_readv64v2(unsigned long fd,
936 const struct compat_iovec __user *vec,
937 unsigned long vlen, loff_t pos, rwf_t flags);
940 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
941 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
942 const struct compat_iovec __user *vec,
943 unsigned long vlen, loff_t pos, rwf_t flags);
948 * Deprecated system calls which are still defined in
949 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
952 /* __ARCH_WANT_SYSCALL_NO_AT */
953 asmlinkage long compat_sys_open(const char __user *filename, int flags,
955 asmlinkage long compat_sys_utimes(const char __user *filename,
956 struct old_timeval32 __user *t);
958 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
959 asmlinkage long compat_sys_signalfd(int ufd,
960 const compat_sigset_t __user *sigmask,
961 compat_size_t sigsetsize);
963 /* __ARCH_WANT_SYSCALL_OFF_T */
964 asmlinkage long compat_sys_newstat(const char __user *filename,
965 struct compat_stat __user *statbuf);
966 asmlinkage long compat_sys_newlstat(const char __user *filename,
967 struct compat_stat __user *statbuf);
969 /* __ARCH_WANT_SYSCALL_DEPRECATED */
970 asmlinkage long compat_sys_time(old_time32_t __user *tloc);
971 asmlinkage long compat_sys_utime(const char __user *filename,
972 struct old_utimbuf32 __user *t);
973 asmlinkage long compat_sys_futimesat(unsigned int dfd,
974 const char __user *filename,
975 struct old_timeval32 __user *t);
976 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
977 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
978 struct old_timeval32 __user *tvp);
979 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
980 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
982 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
984 /* obsolete: fs/readdir.c */
985 asmlinkage long compat_sys_old_readdir(unsigned int fd,
986 struct compat_old_linux_dirent __user *,
989 /* obsolete: fs/select.c */
990 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
993 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
995 /* obsolete: kernel/signal.c */
996 #ifdef __ARCH_WANT_SYS_SIGPENDING
997 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
1000 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
1001 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
1002 compat_old_sigset_t __user *oset);
1004 #ifdef CONFIG_COMPAT_OLD_SIGACTION
1005 asmlinkage long compat_sys_sigaction(int sig,
1006 const struct compat_old_sigaction __user *act,
1007 struct compat_old_sigaction __user *oact);
1010 /* obsolete: kernel/time/time.c */
1011 asmlinkage long compat_sys_stime(old_time32_t __user *tptr);
1013 /* obsolete: net/socket.c */
1014 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
1016 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
1020 * For most but not all architectures, "am I in a compat syscall?" and
1021 * "am I a compat task?" are the same question. For architectures on which
1022 * they aren't the same question, arch code can override in_compat_syscall.
1025 #ifndef in_compat_syscall
1026 static inline bool in_compat_syscall(void) { return is_compat_task(); }
1030 * ns_to_old_timeval32 - Compat version of ns_to_timeval
1031 * @nsec: the nanoseconds value to be converted
1033 * Returns the old_timeval32 representation of the nsec parameter.
1035 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
1038 struct old_timeval32 ctv;
1040 tv = ns_to_timeval(nsec);
1041 ctv.tv_sec = tv.tv_sec;
1042 ctv.tv_usec = tv.tv_usec;
1048 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
1049 * directly. Instead, use one of the functions which work equivalently, such
1050 * as the kcompat_sys_xyzyyz() functions prototyped below.
1053 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
1054 struct compat_statfs64 __user * buf);
1055 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
1056 struct compat_statfs64 __user * buf);
1058 #else /* !CONFIG_COMPAT */
1060 #define is_compat_task() (0)
1061 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
1062 #define in_compat_syscall in_compat_syscall
1063 static inline bool in_compat_syscall(void) { return false; }
1065 #endif /* CONFIG_COMPAT */
1067 #endif /* _LINUX_COMPAT_H */