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 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
138 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
141 int set_compat_user_sigmask(const compat_sigset_t __user *usigmask,
142 sigset_t *set, sigset_t *oldset,
145 struct compat_sigaction {
146 #ifndef __ARCH_HAS_IRIX_SIGACTION
147 compat_uptr_t sa_handler;
148 compat_ulong_t sa_flags;
150 compat_uint_t sa_flags;
151 compat_uptr_t sa_handler;
153 #ifdef __ARCH_HAS_SA_RESTORER
154 compat_uptr_t sa_restorer;
156 compat_sigset_t sa_mask __packed;
159 typedef union compat_sigval {
160 compat_int_t sival_int;
161 compat_uptr_t sival_ptr;
164 typedef struct compat_siginfo {
166 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
175 int _pad[128/sizeof(int) - 3];
179 compat_pid_t _pid; /* sender's pid */
180 __compat_uid32_t _uid; /* sender's uid */
183 /* POSIX.1b timers */
185 compat_timer_t _tid; /* timer id */
186 int _overrun; /* overrun count */
187 compat_sigval_t _sigval; /* same as below */
190 /* POSIX.1b signals */
192 compat_pid_t _pid; /* sender's pid */
193 __compat_uid32_t _uid; /* sender's uid */
194 compat_sigval_t _sigval;
199 compat_pid_t _pid; /* which child */
200 __compat_uid32_t _uid; /* sender's uid */
201 int _status; /* exit code */
202 compat_clock_t _utime;
203 compat_clock_t _stime;
206 #ifdef CONFIG_X86_X32_ABI
207 /* SIGCHLD (x32 version) */
209 compat_pid_t _pid; /* which child */
210 __compat_uid32_t _uid; /* sender's uid */
211 int _status; /* exit code */
217 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
219 compat_uptr_t _addr; /* faulting insn/memory ref. */
220 #ifdef __ARCH_SI_TRAPNO
221 int _trapno; /* TRAP # which caused the signal */
223 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
224 sizeof(short) : __alignof__(compat_uptr_t))
227 * used when si_code=BUS_MCEERR_AR or
228 * used when si_code=BUS_MCEERR_AO
230 short int _addr_lsb; /* Valid LSB of the reported address. */
231 /* used when si_code=SEGV_BNDERR */
233 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
234 compat_uptr_t _lower;
235 compat_uptr_t _upper;
237 /* used when si_code=SEGV_PKUERR */
239 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
247 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
252 compat_uptr_t _call_addr; /* calling user insn */
253 int _syscall; /* triggering system call number */
254 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
260 * These functions operate on 32- or 64-bit specs depending on
261 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
263 extern int compat_get_timespec(struct timespec *, const void __user *);
264 extern int compat_put_timespec(const struct timespec *, void __user *);
265 extern int compat_get_timeval(struct timeval *, const void __user *);
266 extern int compat_put_timeval(const struct timeval *, void __user *);
268 struct compat_iovec {
269 compat_uptr_t iov_base;
270 compat_size_t iov_len;
273 struct compat_rlimit {
274 compat_ulong_t rlim_cur;
275 compat_ulong_t rlim_max;
278 struct compat_rusage {
279 struct old_timeval32 ru_utime;
280 struct old_timeval32 ru_stime;
281 compat_long_t ru_maxrss;
282 compat_long_t ru_ixrss;
283 compat_long_t ru_idrss;
284 compat_long_t ru_isrss;
285 compat_long_t ru_minflt;
286 compat_long_t ru_majflt;
287 compat_long_t ru_nswap;
288 compat_long_t ru_inblock;
289 compat_long_t ru_oublock;
290 compat_long_t ru_msgsnd;
291 compat_long_t ru_msgrcv;
292 compat_long_t ru_nsignals;
293 compat_long_t ru_nvcsw;
294 compat_long_t ru_nivcsw;
297 extern int put_compat_rusage(const struct rusage *,
298 struct compat_rusage __user *);
300 struct compat_siginfo;
301 struct __compat_aio_sigset;
303 struct compat_dirent {
310 struct compat_ustat {
311 compat_daddr_t f_tfree;
312 compat_ino_t f_tinode;
317 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
319 typedef struct compat_sigevent {
320 compat_sigval_t sigev_value;
321 compat_int_t sigev_signo;
322 compat_int_t sigev_notify;
324 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
328 compat_uptr_t _function;
329 compat_uptr_t _attribute;
334 struct compat_ifmap {
335 compat_ulong_t mem_start;
336 compat_ulong_t mem_end;
337 unsigned short base_addr;
343 struct compat_if_settings {
344 unsigned int type; /* Type of physical device or protocol */
345 unsigned int size; /* Size of the data allocated by the caller */
346 compat_uptr_t ifs_ifsu; /* union of pointers */
349 struct compat_ifreq {
351 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
354 struct sockaddr ifru_addr;
355 struct sockaddr ifru_dstaddr;
356 struct sockaddr ifru_broadaddr;
357 struct sockaddr ifru_netmask;
358 struct sockaddr ifru_hwaddr;
360 compat_int_t ifru_ivalue;
361 compat_int_t ifru_mtu;
362 struct compat_ifmap ifru_map;
363 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
364 char ifru_newname[IFNAMSIZ];
365 compat_caddr_t ifru_data;
366 struct compat_if_settings ifru_settings;
370 struct compat_ifconf {
371 compat_int_t ifc_len; /* size of buffer */
372 compat_caddr_t ifcbuf;
375 struct compat_robust_list {
379 struct compat_robust_list_head {
380 struct compat_robust_list list;
381 compat_long_t futex_offset;
382 compat_uptr_t list_op_pending;
385 #ifdef CONFIG_COMPAT_OLD_SIGACTION
386 struct compat_old_sigaction {
387 compat_uptr_t sa_handler;
388 compat_old_sigset_t sa_mask;
389 compat_ulong_t sa_flags;
390 compat_uptr_t sa_restorer;
394 struct compat_keyctl_kdf_params {
395 compat_uptr_t hashname;
396 compat_uptr_t otherinfo;
401 struct compat_statfs;
402 struct compat_statfs64;
403 struct compat_old_linux_dirent;
404 struct compat_linux_dirent;
405 struct linux_dirent64;
406 struct compat_msghdr;
407 struct compat_mmsghdr;
408 struct compat_sysinfo;
409 struct compat_sysctl_args;
410 struct compat_kexec_segment;
411 struct compat_mq_attr;
412 struct compat_msgbuf;
414 extern void compat_exit_robust_list(struct task_struct *curr);
416 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
418 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
420 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
421 unsigned long bitmap_size);
422 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
423 unsigned long bitmap_size);
424 int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from);
425 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from);
426 int get_compat_sigevent(struct sigevent *event,
427 const struct compat_sigevent __user *u_event);
429 static inline int old_timeval32_compare(struct old_timeval32 *lhs,
430 struct old_timeval32 *rhs)
432 if (lhs->tv_sec < rhs->tv_sec)
434 if (lhs->tv_sec > rhs->tv_sec)
436 return lhs->tv_usec - rhs->tv_usec;
439 static inline int old_timespec32_compare(struct old_timespec32 *lhs,
440 struct old_timespec32 *rhs)
442 if (lhs->tv_sec < rhs->tv_sec)
444 if (lhs->tv_sec > rhs->tv_sec)
446 return lhs->tv_nsec - rhs->tv_nsec;
449 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
452 * Defined inline such that size can be compile time constant, which avoids
453 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
456 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
459 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
462 switch (_NSIG_WORDS) {
463 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
465 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
467 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
469 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
471 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
473 return copy_to_user(compat, set, size) ? -EFAULT : 0;
477 extern int compat_ptrace_request(struct task_struct *child,
478 compat_long_t request,
479 compat_ulong_t addr, compat_ulong_t data);
481 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
482 compat_ulong_t addr, compat_ulong_t data);
484 struct epoll_event; /* fortunately, this one is fixed-layout */
486 extern ssize_t compat_rw_copy_check_uvector(int type,
487 const struct compat_iovec __user *uvector,
488 unsigned long nr_segs,
489 unsigned long fast_segs, struct iovec *fast_pointer,
490 struct iovec **ret_pointer);
492 extern void __user *compat_alloc_user_space(unsigned long len);
494 int compat_restore_altstack(const compat_stack_t __user *uss);
495 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
496 #define compat_save_altstack_ex(uss, sp) do { \
497 compat_stack_t __user *__uss = uss; \
498 struct task_struct *t = current; \
499 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
500 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
501 put_user_ex(t->sas_ss_size, &__uss->ss_size); \
502 if (t->sas_ss_flags & SS_AUTODISARM) \
507 * These syscall function prototypes are kept in the same order as
508 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
511 * Please note that these prototypes here are only provided for information
512 * purposes, for static analysis, and for linking from the syscall table.
513 * These functions should not be called elsewhere from kernel code.
515 * As the syscall calling convention may be different from the default
516 * for architectures overriding the syscall calling convention, do not
517 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
519 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
520 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
521 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
523 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
524 compat_long_t min_nr,
526 struct io_event __user *events,
527 struct old_timespec32 __user *timeout,
528 const struct __compat_aio_sigset __user *usig);
529 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
530 compat_long_t min_nr,
532 struct io_event __user *events,
533 struct __kernel_timespec __user *timeout,
534 const struct __compat_aio_sigset __user *usig);
537 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
540 asmlinkage long compat_sys_epoll_pwait(int epfd,
541 struct epoll_event __user *events,
542 int maxevents, int timeout,
543 const compat_sigset_t __user *sigmask,
544 compat_size_t sigsetsize);
547 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
549 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
553 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
557 asmlinkage long compat_sys_mount(const char __user *dev_name,
558 const char __user *dir_name,
559 const char __user *type, compat_ulong_t flags,
560 const void __user *data);
563 asmlinkage long compat_sys_statfs(const char __user *pathname,
564 struct compat_statfs __user *buf);
565 asmlinkage long compat_sys_statfs64(const char __user *pathname,
567 struct compat_statfs64 __user *buf);
568 asmlinkage long compat_sys_fstatfs(unsigned int fd,
569 struct compat_statfs __user *buf);
570 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
571 struct compat_statfs64 __user *buf);
572 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
573 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
574 /* No generic prototype for truncate64, ftruncate64, fallocate */
575 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
576 int flags, umode_t mode);
579 asmlinkage long compat_sys_getdents(unsigned int fd,
580 struct compat_linux_dirent __user *dirent,
583 /* fs/read_write.c */
584 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
585 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
586 const struct compat_iovec __user *vec, compat_ulong_t vlen);
587 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
588 const struct compat_iovec __user *vec, compat_ulong_t vlen);
589 /* No generic prototype for pread64 and pwrite64 */
590 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
591 const struct compat_iovec __user *vec,
592 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
593 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
594 const struct compat_iovec __user *vec,
595 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
596 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
597 asmlinkage long compat_sys_preadv64(unsigned long fd,
598 const struct compat_iovec __user *vec,
599 unsigned long vlen, loff_t pos);
602 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
603 asmlinkage long compat_sys_pwritev64(unsigned long fd,
604 const struct compat_iovec __user *vec,
605 unsigned long vlen, loff_t pos);
609 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
610 compat_off_t __user *offset, compat_size_t count);
611 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
612 compat_loff_t __user *offset, compat_size_t count);
615 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
616 compat_ulong_t __user *outp,
617 compat_ulong_t __user *exp,
618 struct old_timespec32 __user *tsp,
620 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
621 compat_ulong_t __user *outp,
622 compat_ulong_t __user *exp,
623 struct __kernel_timespec __user *tsp,
625 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
627 struct old_timespec32 __user *tsp,
628 const compat_sigset_t __user *sigmask,
629 compat_size_t sigsetsize);
630 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
632 struct __kernel_timespec __user *tsp,
633 const compat_sigset_t __user *sigmask,
634 compat_size_t sigsetsize);
637 asmlinkage long compat_sys_signalfd4(int ufd,
638 const compat_sigset_t __user *sigmask,
639 compat_size_t sigsetsize, int flags);
642 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
643 unsigned int nr_segs, unsigned int flags);
646 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
647 const char __user *filename,
648 struct compat_stat __user *statbuf,
650 asmlinkage long compat_sys_newfstat(unsigned int fd,
651 struct compat_stat __user *statbuf);
653 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
656 asmlinkage long compat_sys_waitid(int, compat_pid_t,
657 struct compat_siginfo __user *, int,
658 struct compat_rusage __user *);
664 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
667 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
668 compat_size_t __user *len_ptr);
670 /* kernel/itimer.c */
671 asmlinkage long compat_sys_getitimer(int which,
672 struct compat_itimerval __user *it);
673 asmlinkage long compat_sys_setitimer(int which,
674 struct compat_itimerval __user *in,
675 struct compat_itimerval __user *out);
678 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
679 compat_ulong_t nr_segments,
680 struct compat_kexec_segment __user *,
681 compat_ulong_t flags);
683 /* kernel/posix-timers.c */
684 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
685 struct compat_sigevent __user *timer_event_spec,
686 timer_t __user *created_timer_id);
688 /* kernel/ptrace.c */
689 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
690 compat_long_t addr, compat_long_t data);
692 /* kernel/sched/core.c */
693 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
695 compat_ulong_t __user *user_mask_ptr);
696 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
698 compat_ulong_t __user *user_mask_ptr);
700 /* kernel/signal.c */
701 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
702 compat_stack_t __user *uoss_ptr);
703 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
704 compat_size_t sigsetsize);
705 #ifndef CONFIG_ODD_RT_SIGACTION
706 asmlinkage long compat_sys_rt_sigaction(int,
707 const struct compat_sigaction __user *,
708 struct compat_sigaction __user *,
711 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
712 compat_sigset_t __user *oset,
713 compat_size_t sigsetsize);
714 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
715 compat_size_t sigsetsize);
716 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
717 struct compat_siginfo __user *uinfo,
718 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
719 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
720 struct compat_siginfo __user *uinfo,
721 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
722 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
723 struct compat_siginfo __user *uinfo);
724 /* No generic prototype for rt_sigreturn */
727 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
728 asmlinkage long compat_sys_getrlimit(unsigned int resource,
729 struct compat_rlimit __user *rlim);
730 asmlinkage long compat_sys_setrlimit(unsigned int resource,
731 struct compat_rlimit __user *rlim);
732 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
735 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
736 struct timezone __user *tz);
737 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
738 struct timezone __user *tz);
741 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
744 asmlinkage long compat_sys_mq_open(const char __user *u_name,
745 int oflag, compat_mode_t mode,
746 struct compat_mq_attr __user *u_attr);
747 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
748 const struct compat_sigevent __user *u_notification);
749 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
750 const struct compat_mq_attr __user *u_mqstat,
751 struct compat_mq_attr __user *u_omqstat);
754 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
755 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
756 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
757 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
758 compat_ssize_t msgsz, int msgflg);
761 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
764 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
765 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
768 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
769 unsigned flags, struct sockaddr __user *addr,
770 int __user *addrlen);
771 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
772 char __user *optval, unsigned int optlen);
773 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
774 char __user *optval, int __user *optlen);
775 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
777 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
780 /* mm/filemap.c: No generic prototype for readahead */
782 /* security/keys/keyctl.c */
783 asmlinkage long compat_sys_keyctl(u32 option,
784 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
786 /* arch/example/kernel/sys_example.c */
787 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
788 const compat_uptr_t __user *envp);
790 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
792 /* mm/, CONFIG_MMU only */
793 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
795 compat_ulong_t __user *nmask,
796 compat_ulong_t maxnode, compat_ulong_t flags);
797 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
798 compat_ulong_t __user *nmask,
799 compat_ulong_t maxnode,
801 compat_ulong_t flags);
802 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
803 compat_ulong_t maxnode);
804 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
805 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
806 const compat_ulong_t __user *new_nodes);
807 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
809 const int __user *nodes,
813 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
814 compat_pid_t pid, int sig,
815 struct compat_siginfo __user *uinfo);
816 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
817 unsigned vlen, unsigned int flags,
818 struct __kernel_timespec __user *timeout);
819 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
820 unsigned vlen, unsigned int flags,
821 struct old_timespec32 __user *timeout);
822 asmlinkage long compat_sys_wait4(compat_pid_t pid,
823 compat_uint_t __user *stat_addr, int options,
824 struct compat_rusage __user *ru);
825 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
826 int, const char __user *);
827 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
828 struct file_handle __user *handle,
830 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
831 unsigned vlen, unsigned int flags);
832 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
833 const struct compat_iovec __user *lvec,
834 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
835 compat_ulong_t riovcnt, compat_ulong_t flags);
836 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
837 const struct compat_iovec __user *lvec,
838 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
839 compat_ulong_t riovcnt, compat_ulong_t flags);
840 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
841 const compat_uptr_t __user *argv,
842 const compat_uptr_t __user *envp, int flags);
843 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
844 const struct compat_iovec __user *vec,
845 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
846 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
847 const struct compat_iovec __user *vec,
848 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
849 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
850 asmlinkage long compat_sys_readv64v2(unsigned long fd,
851 const struct compat_iovec __user *vec,
852 unsigned long vlen, loff_t pos, rwf_t flags);
855 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
856 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
857 const struct compat_iovec __user *vec,
858 unsigned long vlen, loff_t pos, rwf_t flags);
863 * Deprecated system calls which are still defined in
864 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
867 /* __ARCH_WANT_SYSCALL_NO_AT */
868 asmlinkage long compat_sys_open(const char __user *filename, int flags,
871 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
872 asmlinkage long compat_sys_signalfd(int ufd,
873 const compat_sigset_t __user *sigmask,
874 compat_size_t sigsetsize);
876 /* __ARCH_WANT_SYSCALL_OFF_T */
877 asmlinkage long compat_sys_newstat(const char __user *filename,
878 struct compat_stat __user *statbuf);
879 asmlinkage long compat_sys_newlstat(const char __user *filename,
880 struct compat_stat __user *statbuf);
882 /* __ARCH_WANT_SYSCALL_DEPRECATED */
883 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
884 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
885 struct old_timeval32 __user *tvp);
886 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
887 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
889 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
891 /* obsolete: fs/readdir.c */
892 asmlinkage long compat_sys_old_readdir(unsigned int fd,
893 struct compat_old_linux_dirent __user *,
896 /* obsolete: fs/select.c */
897 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
900 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
902 /* obsolete: kernel/signal.c */
903 #ifdef __ARCH_WANT_SYS_SIGPENDING
904 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
907 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
908 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
909 compat_old_sigset_t __user *oset);
911 #ifdef CONFIG_COMPAT_OLD_SIGACTION
912 asmlinkage long compat_sys_sigaction(int sig,
913 const struct compat_old_sigaction __user *act,
914 struct compat_old_sigaction __user *oact);
917 /* obsolete: net/socket.c */
918 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
920 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
924 * For most but not all architectures, "am I in a compat syscall?" and
925 * "am I a compat task?" are the same question. For architectures on which
926 * they aren't the same question, arch code can override in_compat_syscall.
929 #ifndef in_compat_syscall
930 static inline bool in_compat_syscall(void) { return is_compat_task(); }
934 * ns_to_old_timeval32 - Compat version of ns_to_timeval
935 * @nsec: the nanoseconds value to be converted
937 * Returns the old_timeval32 representation of the nsec parameter.
939 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
942 struct old_timeval32 ctv;
944 tv = ns_to_timeval(nsec);
945 ctv.tv_sec = tv.tv_sec;
946 ctv.tv_usec = tv.tv_usec;
952 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
953 * directly. Instead, use one of the functions which work equivalently, such
954 * as the kcompat_sys_xyzyyz() functions prototyped below.
957 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
958 struct compat_statfs64 __user * buf);
959 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
960 struct compat_statfs64 __user * buf);
962 #else /* !CONFIG_COMPAT */
964 #define is_compat_task() (0)
965 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
966 #define in_compat_syscall in_compat_syscall
967 static inline bool in_compat_syscall(void) { return false; }
969 #endif /* CONFIG_COMPAT */
971 #endif /* _LINUX_COMPAT_H */