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 old_itimerval32
;
122 compat_clock_t tms_utime
;
123 compat_clock_t tms_stime
;
124 compat_clock_t tms_cutime
;
125 compat_clock_t tms_cstime
;
128 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
131 compat_sigset_word sig
[_COMPAT_NSIG_WORDS
];
134 int set_compat_user_sigmask(const compat_sigset_t __user
*umask
,
137 struct compat_sigaction
{
138 #ifndef __ARCH_HAS_IRIX_SIGACTION
139 compat_uptr_t sa_handler
;
140 compat_ulong_t sa_flags
;
142 compat_uint_t sa_flags
;
143 compat_uptr_t sa_handler
;
145 #ifdef __ARCH_HAS_SA_RESTORER
146 compat_uptr_t sa_restorer
;
148 compat_sigset_t sa_mask __packed
;
151 typedef union compat_sigval
{
152 compat_int_t sival_int
;
153 compat_uptr_t sival_ptr
;
156 typedef struct compat_siginfo
{
158 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
167 int _pad
[128/sizeof(int) - 3];
171 compat_pid_t _pid
; /* sender's pid */
172 __compat_uid32_t _uid
; /* sender's uid */
175 /* POSIX.1b timers */
177 compat_timer_t _tid
; /* timer id */
178 int _overrun
; /* overrun count */
179 compat_sigval_t _sigval
; /* same as below */
182 /* POSIX.1b signals */
184 compat_pid_t _pid
; /* sender's pid */
185 __compat_uid32_t _uid
; /* sender's uid */
186 compat_sigval_t _sigval
;
191 compat_pid_t _pid
; /* which child */
192 __compat_uid32_t _uid
; /* sender's uid */
193 int _status
; /* exit code */
194 compat_clock_t _utime
;
195 compat_clock_t _stime
;
198 #ifdef CONFIG_X86_X32_ABI
199 /* SIGCHLD (x32 version) */
201 compat_pid_t _pid
; /* which child */
202 __compat_uid32_t _uid
; /* sender's uid */
203 int _status
; /* exit code */
209 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
211 compat_uptr_t _addr
; /* faulting insn/memory ref. */
212 #ifdef __ARCH_SI_TRAPNO
213 int _trapno
; /* TRAP # which caused the signal */
215 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
216 sizeof(short) : __alignof__(compat_uptr_t))
219 * used when si_code=BUS_MCEERR_AR or
220 * used when si_code=BUS_MCEERR_AO
222 short int _addr_lsb
; /* Valid LSB of the reported address. */
223 /* used when si_code=SEGV_BNDERR */
225 char _dummy_bnd
[__COMPAT_ADDR_BND_PKEY_PAD
];
226 compat_uptr_t _lower
;
227 compat_uptr_t _upper
;
229 /* used when si_code=SEGV_PKUERR */
231 char _dummy_pkey
[__COMPAT_ADDR_BND_PKEY_PAD
];
239 compat_long_t _band
; /* POLL_IN, POLL_OUT, POLL_MSG */
244 compat_uptr_t _call_addr
; /* calling user insn */
245 int _syscall
; /* triggering system call number */
246 unsigned int _arch
; /* AUDIT_ARCH_* of syscall */
251 struct compat_iovec
{
252 compat_uptr_t iov_base
;
253 compat_size_t iov_len
;
256 struct compat_rlimit
{
257 compat_ulong_t rlim_cur
;
258 compat_ulong_t rlim_max
;
261 struct compat_rusage
{
262 struct old_timeval32 ru_utime
;
263 struct old_timeval32 ru_stime
;
264 compat_long_t ru_maxrss
;
265 compat_long_t ru_ixrss
;
266 compat_long_t ru_idrss
;
267 compat_long_t ru_isrss
;
268 compat_long_t ru_minflt
;
269 compat_long_t ru_majflt
;
270 compat_long_t ru_nswap
;
271 compat_long_t ru_inblock
;
272 compat_long_t ru_oublock
;
273 compat_long_t ru_msgsnd
;
274 compat_long_t ru_msgrcv
;
275 compat_long_t ru_nsignals
;
276 compat_long_t ru_nvcsw
;
277 compat_long_t ru_nivcsw
;
280 extern int put_compat_rusage(const struct rusage
*,
281 struct compat_rusage __user
*);
283 struct compat_siginfo
;
284 struct __compat_aio_sigset
;
286 struct compat_dirent
{
293 struct compat_ustat
{
294 compat_daddr_t f_tfree
;
295 compat_ino_t f_tinode
;
300 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
302 typedef struct compat_sigevent
{
303 compat_sigval_t sigev_value
;
304 compat_int_t sigev_signo
;
305 compat_int_t sigev_notify
;
307 compat_int_t _pad
[COMPAT_SIGEV_PAD_SIZE
];
311 compat_uptr_t _function
;
312 compat_uptr_t _attribute
;
317 struct compat_ifmap
{
318 compat_ulong_t mem_start
;
319 compat_ulong_t mem_end
;
320 unsigned short base_addr
;
326 struct compat_if_settings
{
327 unsigned int type
; /* Type of physical device or protocol */
328 unsigned int size
; /* Size of the data allocated by the caller */
329 compat_uptr_t ifs_ifsu
; /* union of pointers */
332 struct compat_ifreq
{
334 char ifrn_name
[IFNAMSIZ
]; /* if name, e.g. "en0" */
337 struct sockaddr ifru_addr
;
338 struct sockaddr ifru_dstaddr
;
339 struct sockaddr ifru_broadaddr
;
340 struct sockaddr ifru_netmask
;
341 struct sockaddr ifru_hwaddr
;
343 compat_int_t ifru_ivalue
;
344 compat_int_t ifru_mtu
;
345 struct compat_ifmap ifru_map
;
346 char ifru_slave
[IFNAMSIZ
]; /* Just fits the size */
347 char ifru_newname
[IFNAMSIZ
];
348 compat_caddr_t ifru_data
;
349 struct compat_if_settings ifru_settings
;
353 struct compat_ifconf
{
354 compat_int_t ifc_len
; /* size of buffer */
355 compat_caddr_t ifcbuf
;
358 struct compat_robust_list
{
362 struct compat_robust_list_head
{
363 struct compat_robust_list list
;
364 compat_long_t futex_offset
;
365 compat_uptr_t list_op_pending
;
368 #ifdef CONFIG_COMPAT_OLD_SIGACTION
369 struct compat_old_sigaction
{
370 compat_uptr_t sa_handler
;
371 compat_old_sigset_t sa_mask
;
372 compat_ulong_t sa_flags
;
373 compat_uptr_t sa_restorer
;
377 struct compat_keyctl_kdf_params
{
378 compat_uptr_t hashname
;
379 compat_uptr_t otherinfo
;
384 struct compat_statfs
;
385 struct compat_statfs64
;
386 struct compat_old_linux_dirent
;
387 struct compat_linux_dirent
;
388 struct linux_dirent64
;
389 struct compat_msghdr
;
390 struct compat_mmsghdr
;
391 struct compat_sysinfo
;
392 struct compat_sysctl_args
;
393 struct compat_kexec_segment
;
394 struct compat_mq_attr
;
395 struct compat_msgbuf
;
397 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
399 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
401 long compat_get_bitmap(unsigned long *mask
, const compat_ulong_t __user
*umask
,
402 unsigned long bitmap_size
);
403 long compat_put_bitmap(compat_ulong_t __user
*umask
, unsigned long *mask
,
404 unsigned long bitmap_size
);
405 void copy_siginfo_to_external32(struct compat_siginfo
*to
,
406 const struct kernel_siginfo
*from
);
407 int copy_siginfo_from_user32(kernel_siginfo_t
*to
,
408 const struct compat_siginfo __user
*from
);
409 int __copy_siginfo_to_user32(struct compat_siginfo __user
*to
,
410 const kernel_siginfo_t
*from
);
411 #ifndef copy_siginfo_to_user32
412 #define copy_siginfo_to_user32 __copy_siginfo_to_user32
414 int get_compat_sigevent(struct sigevent
*event
,
415 const struct compat_sigevent __user
*u_event
);
417 extern int get_compat_sigset(sigset_t
*set
, const compat_sigset_t __user
*compat
);
420 * Defined inline such that size can be compile time constant, which avoids
421 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
424 put_compat_sigset(compat_sigset_t __user
*compat
, const sigset_t
*set
,
427 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
430 switch (_NSIG_WORDS
) {
431 case 4: v
.sig
[7] = (set
->sig
[3] >> 32); v
.sig
[6] = set
->sig
[3];
433 case 3: v
.sig
[5] = (set
->sig
[2] >> 32); v
.sig
[4] = set
->sig
[2];
435 case 2: v
.sig
[3] = (set
->sig
[1] >> 32); v
.sig
[2] = set
->sig
[1];
437 case 1: v
.sig
[1] = (set
->sig
[0] >> 32); v
.sig
[0] = set
->sig
[0];
439 return copy_to_user(compat
, &v
, size
) ? -EFAULT
: 0;
441 return copy_to_user(compat
, set
, size
) ? -EFAULT
: 0;
445 extern int compat_ptrace_request(struct task_struct
*child
,
446 compat_long_t request
,
447 compat_ulong_t addr
, compat_ulong_t data
);
449 extern long compat_arch_ptrace(struct task_struct
*child
, compat_long_t request
,
450 compat_ulong_t addr
, compat_ulong_t data
);
452 struct epoll_event
; /* fortunately, this one is fixed-layout */
454 extern ssize_t
compat_rw_copy_check_uvector(int type
,
455 const struct compat_iovec __user
*uvector
,
456 unsigned long nr_segs
,
457 unsigned long fast_segs
, struct iovec
*fast_pointer
,
458 struct iovec
**ret_pointer
);
460 extern void __user
*compat_alloc_user_space(unsigned long len
);
462 int compat_restore_altstack(const compat_stack_t __user
*uss
);
463 int __compat_save_altstack(compat_stack_t __user
*, unsigned long);
464 #define unsafe_compat_save_altstack(uss, sp, label) do { \
465 compat_stack_t __user *__uss = uss; \
466 struct task_struct *t = current; \
467 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \
468 &__uss->ss_sp, label); \
469 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \
470 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \
471 if (t->sas_ss_flags & SS_AUTODISARM) \
476 * These syscall function prototypes are kept in the same order as
477 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
480 * Please note that these prototypes here are only provided for information
481 * purposes, for static analysis, and for linking from the syscall table.
482 * These functions should not be called elsewhere from kernel code.
484 * As the syscall calling convention may be different from the default
485 * for architectures overriding the syscall calling convention, do not
486 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
488 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
489 asmlinkage
long compat_sys_io_setup(unsigned nr_reqs
, u32 __user
*ctx32p
);
490 asmlinkage
long compat_sys_io_submit(compat_aio_context_t ctx_id
, int nr
,
492 asmlinkage
long compat_sys_io_pgetevents(compat_aio_context_t ctx_id
,
493 compat_long_t min_nr
,
495 struct io_event __user
*events
,
496 struct old_timespec32 __user
*timeout
,
497 const struct __compat_aio_sigset __user
*usig
);
498 asmlinkage
long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id
,
499 compat_long_t min_nr
,
501 struct io_event __user
*events
,
502 struct __kernel_timespec __user
*timeout
,
503 const struct __compat_aio_sigset __user
*usig
);
506 asmlinkage
long compat_sys_lookup_dcookie(u32
, u32
, char __user
*, compat_size_t
);
509 asmlinkage
long compat_sys_epoll_pwait(int epfd
,
510 struct epoll_event __user
*events
,
511 int maxevents
, int timeout
,
512 const compat_sigset_t __user
*sigmask
,
513 compat_size_t sigsetsize
);
516 asmlinkage
long compat_sys_fcntl(unsigned int fd
, unsigned int cmd
,
518 asmlinkage
long compat_sys_fcntl64(unsigned int fd
, unsigned int cmd
,
522 asmlinkage
long compat_sys_ioctl(unsigned int fd
, unsigned int cmd
,
526 asmlinkage
long compat_sys_mount(const char __user
*dev_name
,
527 const char __user
*dir_name
,
528 const char __user
*type
, compat_ulong_t flags
,
529 const void __user
*data
);
532 asmlinkage
long compat_sys_statfs(const char __user
*pathname
,
533 struct compat_statfs __user
*buf
);
534 asmlinkage
long compat_sys_statfs64(const char __user
*pathname
,
536 struct compat_statfs64 __user
*buf
);
537 asmlinkage
long compat_sys_fstatfs(unsigned int fd
,
538 struct compat_statfs __user
*buf
);
539 asmlinkage
long compat_sys_fstatfs64(unsigned int fd
, compat_size_t sz
,
540 struct compat_statfs64 __user
*buf
);
541 asmlinkage
long compat_sys_truncate(const char __user
*, compat_off_t
);
542 asmlinkage
long compat_sys_ftruncate(unsigned int, compat_ulong_t
);
543 /* No generic prototype for truncate64, ftruncate64, fallocate */
544 asmlinkage
long compat_sys_openat(int dfd
, const char __user
*filename
,
545 int flags
, umode_t mode
);
548 asmlinkage
long compat_sys_getdents(unsigned int fd
,
549 struct compat_linux_dirent __user
*dirent
,
552 /* fs/read_write.c */
553 asmlinkage
long compat_sys_lseek(unsigned int, compat_off_t
, unsigned int);
554 asmlinkage ssize_t
compat_sys_readv(compat_ulong_t fd
,
555 const struct compat_iovec __user
*vec
, compat_ulong_t vlen
);
556 asmlinkage ssize_t
compat_sys_writev(compat_ulong_t fd
,
557 const struct compat_iovec __user
*vec
, compat_ulong_t vlen
);
558 /* No generic prototype for pread64 and pwrite64 */
559 asmlinkage ssize_t
compat_sys_preadv(compat_ulong_t fd
,
560 const struct compat_iovec __user
*vec
,
561 compat_ulong_t vlen
, u32 pos_low
, u32 pos_high
);
562 asmlinkage ssize_t
compat_sys_pwritev(compat_ulong_t fd
,
563 const struct compat_iovec __user
*vec
,
564 compat_ulong_t vlen
, u32 pos_low
, u32 pos_high
);
565 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
566 asmlinkage
long compat_sys_preadv64(unsigned long fd
,
567 const struct compat_iovec __user
*vec
,
568 unsigned long vlen
, loff_t pos
);
571 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
572 asmlinkage
long compat_sys_pwritev64(unsigned long fd
,
573 const struct compat_iovec __user
*vec
,
574 unsigned long vlen
, loff_t pos
);
578 asmlinkage
long compat_sys_sendfile(int out_fd
, int in_fd
,
579 compat_off_t __user
*offset
, compat_size_t count
);
580 asmlinkage
long compat_sys_sendfile64(int out_fd
, int in_fd
,
581 compat_loff_t __user
*offset
, compat_size_t count
);
584 asmlinkage
long compat_sys_pselect6_time32(int n
, compat_ulong_t __user
*inp
,
585 compat_ulong_t __user
*outp
,
586 compat_ulong_t __user
*exp
,
587 struct old_timespec32 __user
*tsp
,
589 asmlinkage
long compat_sys_pselect6_time64(int n
, compat_ulong_t __user
*inp
,
590 compat_ulong_t __user
*outp
,
591 compat_ulong_t __user
*exp
,
592 struct __kernel_timespec __user
*tsp
,
594 asmlinkage
long compat_sys_ppoll_time32(struct pollfd __user
*ufds
,
596 struct old_timespec32 __user
*tsp
,
597 const compat_sigset_t __user
*sigmask
,
598 compat_size_t sigsetsize
);
599 asmlinkage
long compat_sys_ppoll_time64(struct pollfd __user
*ufds
,
601 struct __kernel_timespec __user
*tsp
,
602 const compat_sigset_t __user
*sigmask
,
603 compat_size_t sigsetsize
);
606 asmlinkage
long compat_sys_signalfd4(int ufd
,
607 const compat_sigset_t __user
*sigmask
,
608 compat_size_t sigsetsize
, int flags
);
611 asmlinkage
long compat_sys_vmsplice(int fd
, const struct compat_iovec __user
*,
612 unsigned int nr_segs
, unsigned int flags
);
615 asmlinkage
long compat_sys_newfstatat(unsigned int dfd
,
616 const char __user
*filename
,
617 struct compat_stat __user
*statbuf
,
619 asmlinkage
long compat_sys_newfstat(unsigned int fd
,
620 struct compat_stat __user
*statbuf
);
622 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
625 asmlinkage
long compat_sys_waitid(int, compat_pid_t
,
626 struct compat_siginfo __user
*, int,
627 struct compat_rusage __user
*);
633 compat_sys_set_robust_list(struct compat_robust_list_head __user
*head
,
636 compat_sys_get_robust_list(int pid
, compat_uptr_t __user
*head_ptr
,
637 compat_size_t __user
*len_ptr
);
639 /* kernel/itimer.c */
640 asmlinkage
long compat_sys_getitimer(int which
,
641 struct old_itimerval32 __user
*it
);
642 asmlinkage
long compat_sys_setitimer(int which
,
643 struct old_itimerval32 __user
*in
,
644 struct old_itimerval32 __user
*out
);
647 asmlinkage
long compat_sys_kexec_load(compat_ulong_t entry
,
648 compat_ulong_t nr_segments
,
649 struct compat_kexec_segment __user
*,
650 compat_ulong_t flags
);
652 /* kernel/posix-timers.c */
653 asmlinkage
long compat_sys_timer_create(clockid_t which_clock
,
654 struct compat_sigevent __user
*timer_event_spec
,
655 timer_t __user
*created_timer_id
);
657 /* kernel/ptrace.c */
658 asmlinkage
long compat_sys_ptrace(compat_long_t request
, compat_long_t pid
,
659 compat_long_t addr
, compat_long_t data
);
661 /* kernel/sched/core.c */
662 asmlinkage
long compat_sys_sched_setaffinity(compat_pid_t pid
,
664 compat_ulong_t __user
*user_mask_ptr
);
665 asmlinkage
long compat_sys_sched_getaffinity(compat_pid_t pid
,
667 compat_ulong_t __user
*user_mask_ptr
);
669 /* kernel/signal.c */
670 asmlinkage
long compat_sys_sigaltstack(const compat_stack_t __user
*uss_ptr
,
671 compat_stack_t __user
*uoss_ptr
);
672 asmlinkage
long compat_sys_rt_sigsuspend(compat_sigset_t __user
*unewset
,
673 compat_size_t sigsetsize
);
674 #ifndef CONFIG_ODD_RT_SIGACTION
675 asmlinkage
long compat_sys_rt_sigaction(int,
676 const struct compat_sigaction __user
*,
677 struct compat_sigaction __user
*,
680 asmlinkage
long compat_sys_rt_sigprocmask(int how
, compat_sigset_t __user
*set
,
681 compat_sigset_t __user
*oset
,
682 compat_size_t sigsetsize
);
683 asmlinkage
long compat_sys_rt_sigpending(compat_sigset_t __user
*uset
,
684 compat_size_t sigsetsize
);
685 asmlinkage
long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user
*uthese
,
686 struct compat_siginfo __user
*uinfo
,
687 struct old_timespec32 __user
*uts
, compat_size_t sigsetsize
);
688 asmlinkage
long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user
*uthese
,
689 struct compat_siginfo __user
*uinfo
,
690 struct __kernel_timespec __user
*uts
, compat_size_t sigsetsize
);
691 asmlinkage
long compat_sys_rt_sigqueueinfo(compat_pid_t pid
, int sig
,
692 struct compat_siginfo __user
*uinfo
);
693 /* No generic prototype for rt_sigreturn */
696 asmlinkage
long compat_sys_times(struct compat_tms __user
*tbuf
);
697 asmlinkage
long compat_sys_getrlimit(unsigned int resource
,
698 struct compat_rlimit __user
*rlim
);
699 asmlinkage
long compat_sys_setrlimit(unsigned int resource
,
700 struct compat_rlimit __user
*rlim
);
701 asmlinkage
long compat_sys_getrusage(int who
, struct compat_rusage __user
*ru
);
704 asmlinkage
long compat_sys_gettimeofday(struct old_timeval32 __user
*tv
,
705 struct timezone __user
*tz
);
706 asmlinkage
long compat_sys_settimeofday(struct old_timeval32 __user
*tv
,
707 struct timezone __user
*tz
);
710 asmlinkage
long compat_sys_sysinfo(struct compat_sysinfo __user
*info
);
713 asmlinkage
long compat_sys_mq_open(const char __user
*u_name
,
714 int oflag
, compat_mode_t mode
,
715 struct compat_mq_attr __user
*u_attr
);
716 asmlinkage
long compat_sys_mq_notify(mqd_t mqdes
,
717 const struct compat_sigevent __user
*u_notification
);
718 asmlinkage
long compat_sys_mq_getsetattr(mqd_t mqdes
,
719 const struct compat_mq_attr __user
*u_mqstat
,
720 struct compat_mq_attr __user
*u_omqstat
);
723 asmlinkage
long compat_sys_msgctl(int first
, int second
, void __user
*uptr
);
724 asmlinkage
long compat_sys_msgrcv(int msqid
, compat_uptr_t msgp
,
725 compat_ssize_t msgsz
, compat_long_t msgtyp
, int msgflg
);
726 asmlinkage
long compat_sys_msgsnd(int msqid
, compat_uptr_t msgp
,
727 compat_ssize_t msgsz
, int msgflg
);
730 asmlinkage
long compat_sys_semctl(int semid
, int semnum
, int cmd
, int arg
);
733 asmlinkage
long compat_sys_shmctl(int first
, int second
, void __user
*uptr
);
734 asmlinkage
long compat_sys_shmat(int shmid
, compat_uptr_t shmaddr
, int shmflg
);
737 asmlinkage
long compat_sys_recvfrom(int fd
, void __user
*buf
, compat_size_t len
,
738 unsigned flags
, struct sockaddr __user
*addr
,
739 int __user
*addrlen
);
740 asmlinkage
long compat_sys_setsockopt(int fd
, int level
, int optname
,
741 char __user
*optval
, unsigned int optlen
);
742 asmlinkage
long compat_sys_getsockopt(int fd
, int level
, int optname
,
743 char __user
*optval
, int __user
*optlen
);
744 asmlinkage
long compat_sys_sendmsg(int fd
, struct compat_msghdr __user
*msg
,
746 asmlinkage
long compat_sys_recvmsg(int fd
, struct compat_msghdr __user
*msg
,
749 /* mm/filemap.c: No generic prototype for readahead */
751 /* security/keys/keyctl.c */
752 asmlinkage
long compat_sys_keyctl(u32 option
,
753 u32 arg2
, u32 arg3
, u32 arg4
, u32 arg5
);
755 /* arch/example/kernel/sys_example.c */
756 asmlinkage
long compat_sys_execve(const char __user
*filename
, const compat_uptr_t __user
*argv
,
757 const compat_uptr_t __user
*envp
);
759 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
761 /* mm/, CONFIG_MMU only */
762 asmlinkage
long compat_sys_mbind(compat_ulong_t start
, compat_ulong_t len
,
764 compat_ulong_t __user
*nmask
,
765 compat_ulong_t maxnode
, compat_ulong_t flags
);
766 asmlinkage
long compat_sys_get_mempolicy(int __user
*policy
,
767 compat_ulong_t __user
*nmask
,
768 compat_ulong_t maxnode
,
770 compat_ulong_t flags
);
771 asmlinkage
long compat_sys_set_mempolicy(int mode
, compat_ulong_t __user
*nmask
,
772 compat_ulong_t maxnode
);
773 asmlinkage
long compat_sys_migrate_pages(compat_pid_t pid
,
774 compat_ulong_t maxnode
, const compat_ulong_t __user
*old_nodes
,
775 const compat_ulong_t __user
*new_nodes
);
776 asmlinkage
long compat_sys_move_pages(pid_t pid
, compat_ulong_t nr_pages
,
778 const int __user
*nodes
,
782 asmlinkage
long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid
,
783 compat_pid_t pid
, int sig
,
784 struct compat_siginfo __user
*uinfo
);
785 asmlinkage
long compat_sys_recvmmsg_time64(int fd
, struct compat_mmsghdr __user
*mmsg
,
786 unsigned vlen
, unsigned int flags
,
787 struct __kernel_timespec __user
*timeout
);
788 asmlinkage
long compat_sys_recvmmsg_time32(int fd
, struct compat_mmsghdr __user
*mmsg
,
789 unsigned vlen
, unsigned int flags
,
790 struct old_timespec32 __user
*timeout
);
791 asmlinkage
long compat_sys_wait4(compat_pid_t pid
,
792 compat_uint_t __user
*stat_addr
, int options
,
793 struct compat_rusage __user
*ru
);
794 asmlinkage
long compat_sys_fanotify_mark(int, unsigned int, __u32
, __u32
,
795 int, const char __user
*);
796 asmlinkage
long compat_sys_open_by_handle_at(int mountdirfd
,
797 struct file_handle __user
*handle
,
799 asmlinkage
long compat_sys_sendmmsg(int fd
, struct compat_mmsghdr __user
*mmsg
,
800 unsigned vlen
, unsigned int flags
);
801 asmlinkage ssize_t
compat_sys_process_vm_readv(compat_pid_t pid
,
802 const struct compat_iovec __user
*lvec
,
803 compat_ulong_t liovcnt
, const struct compat_iovec __user
*rvec
,
804 compat_ulong_t riovcnt
, compat_ulong_t flags
);
805 asmlinkage ssize_t
compat_sys_process_vm_writev(compat_pid_t pid
,
806 const struct compat_iovec __user
*lvec
,
807 compat_ulong_t liovcnt
, const struct compat_iovec __user
*rvec
,
808 compat_ulong_t riovcnt
, compat_ulong_t flags
);
809 asmlinkage
long compat_sys_execveat(int dfd
, const char __user
*filename
,
810 const compat_uptr_t __user
*argv
,
811 const compat_uptr_t __user
*envp
, int flags
);
812 asmlinkage ssize_t
compat_sys_preadv2(compat_ulong_t fd
,
813 const struct compat_iovec __user
*vec
,
814 compat_ulong_t vlen
, u32 pos_low
, u32 pos_high
, rwf_t flags
);
815 asmlinkage ssize_t
compat_sys_pwritev2(compat_ulong_t fd
,
816 const struct compat_iovec __user
*vec
,
817 compat_ulong_t vlen
, u32 pos_low
, u32 pos_high
, rwf_t flags
);
818 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
819 asmlinkage
long compat_sys_readv64v2(unsigned long fd
,
820 const struct compat_iovec __user
*vec
,
821 unsigned long vlen
, loff_t pos
, rwf_t flags
);
824 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
825 asmlinkage
long compat_sys_pwritev64v2(unsigned long fd
,
826 const struct compat_iovec __user
*vec
,
827 unsigned long vlen
, loff_t pos
, rwf_t flags
);
832 * Deprecated system calls which are still defined in
833 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
836 /* __ARCH_WANT_SYSCALL_NO_AT */
837 asmlinkage
long compat_sys_open(const char __user
*filename
, int flags
,
840 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
841 asmlinkage
long compat_sys_signalfd(int ufd
,
842 const compat_sigset_t __user
*sigmask
,
843 compat_size_t sigsetsize
);
845 /* __ARCH_WANT_SYSCALL_OFF_T */
846 asmlinkage
long compat_sys_newstat(const char __user
*filename
,
847 struct compat_stat __user
*statbuf
);
848 asmlinkage
long compat_sys_newlstat(const char __user
*filename
,
849 struct compat_stat __user
*statbuf
);
851 /* __ARCH_WANT_SYSCALL_DEPRECATED */
852 asmlinkage
long compat_sys_select(int n
, compat_ulong_t __user
*inp
,
853 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
854 struct old_timeval32 __user
*tvp
);
855 asmlinkage
long compat_sys_ustat(unsigned dev
, struct compat_ustat __user
*u32
);
856 asmlinkage
long compat_sys_recv(int fd
, void __user
*buf
, compat_size_t len
,
858 asmlinkage
long compat_sys_sysctl(struct compat_sysctl_args __user
*args
);
860 /* obsolete: fs/readdir.c */
861 asmlinkage
long compat_sys_old_readdir(unsigned int fd
,
862 struct compat_old_linux_dirent __user
*,
865 /* obsolete: fs/select.c */
866 asmlinkage
long compat_sys_old_select(struct compat_sel_arg_struct __user
*arg
);
869 asmlinkage
long compat_sys_ipc(u32
, int, int, u32
, compat_uptr_t
, u32
);
871 /* obsolete: kernel/signal.c */
872 #ifdef __ARCH_WANT_SYS_SIGPENDING
873 asmlinkage
long compat_sys_sigpending(compat_old_sigset_t __user
*set
);
876 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
877 asmlinkage
long compat_sys_sigprocmask(int how
, compat_old_sigset_t __user
*nset
,
878 compat_old_sigset_t __user
*oset
);
880 #ifdef CONFIG_COMPAT_OLD_SIGACTION
881 asmlinkage
long compat_sys_sigaction(int sig
,
882 const struct compat_old_sigaction __user
*act
,
883 struct compat_old_sigaction __user
*oact
);
886 /* obsolete: net/socket.c */
887 asmlinkage
long compat_sys_socketcall(int call
, u32 __user
*args
);
889 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
893 * For most but not all architectures, "am I in a compat syscall?" and
894 * "am I a compat task?" are the same question. For architectures on which
895 * they aren't the same question, arch code can override in_compat_syscall.
898 #ifndef in_compat_syscall
899 static inline bool in_compat_syscall(void) { return is_compat_task(); }
903 * ns_to_old_timeval32 - Compat version of ns_to_timeval
904 * @nsec: the nanoseconds value to be converted
906 * Returns the old_timeval32 representation of the nsec parameter.
908 static inline struct old_timeval32
ns_to_old_timeval32(s64 nsec
)
910 struct __kernel_old_timeval tv
;
911 struct old_timeval32 ctv
;
913 tv
= ns_to_kernel_old_timeval(nsec
);
914 ctv
.tv_sec
= tv
.tv_sec
;
915 ctv
.tv_usec
= tv
.tv_usec
;
921 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
922 * directly. Instead, use one of the functions which work equivalently, such
923 * as the kcompat_sys_xyzyyz() functions prototyped below.
926 int kcompat_sys_statfs64(const char __user
* pathname
, compat_size_t sz
,
927 struct compat_statfs64 __user
* buf
);
928 int kcompat_sys_fstatfs64(unsigned int fd
, compat_size_t sz
,
929 struct compat_statfs64 __user
* buf
);
931 #else /* !CONFIG_COMPAT */
933 #define is_compat_task() (0)
934 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
935 #define in_compat_syscall in_compat_syscall
936 static inline bool in_compat_syscall(void) { return false; }
938 #endif /* CONFIG_COMPAT */
941 * A pointer passed in from user mode. This should not
942 * be used for syscall parameters, just declare them
943 * as pointers because the syscall entry code will have
944 * appropriately converted them already.
947 static inline void __user
*compat_ptr(compat_uptr_t uptr
)
949 return (void __user
*)(unsigned long)uptr
;
953 static inline compat_uptr_t
ptr_to_compat(void __user
*uptr
)
955 return (u32
)(unsigned long)uptr
;
958 #endif /* _LINUX_COMPAT_H */