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 */
252 * These functions operate on 32- or 64-bit specs depending on
253 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
255 extern int compat_get_timespec(struct timespec *, const void __user *);
256 extern int compat_put_timespec(const struct timespec *, void __user *);
257 extern int compat_get_timeval(struct timeval *, const void __user *);
258 extern int compat_put_timeval(const struct timeval *, void __user *);
260 struct compat_iovec {
261 compat_uptr_t iov_base;
262 compat_size_t iov_len;
265 struct compat_rlimit {
266 compat_ulong_t rlim_cur;
267 compat_ulong_t rlim_max;
270 struct compat_rusage {
271 struct old_timeval32 ru_utime;
272 struct old_timeval32 ru_stime;
273 compat_long_t ru_maxrss;
274 compat_long_t ru_ixrss;
275 compat_long_t ru_idrss;
276 compat_long_t ru_isrss;
277 compat_long_t ru_minflt;
278 compat_long_t ru_majflt;
279 compat_long_t ru_nswap;
280 compat_long_t ru_inblock;
281 compat_long_t ru_oublock;
282 compat_long_t ru_msgsnd;
283 compat_long_t ru_msgrcv;
284 compat_long_t ru_nsignals;
285 compat_long_t ru_nvcsw;
286 compat_long_t ru_nivcsw;
289 extern int put_compat_rusage(const struct rusage *,
290 struct compat_rusage __user *);
292 struct compat_siginfo;
293 struct __compat_aio_sigset;
295 struct compat_dirent {
302 struct compat_ustat {
303 compat_daddr_t f_tfree;
304 compat_ino_t f_tinode;
309 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
311 typedef struct compat_sigevent {
312 compat_sigval_t sigev_value;
313 compat_int_t sigev_signo;
314 compat_int_t sigev_notify;
316 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
320 compat_uptr_t _function;
321 compat_uptr_t _attribute;
326 struct compat_ifmap {
327 compat_ulong_t mem_start;
328 compat_ulong_t mem_end;
329 unsigned short base_addr;
335 struct compat_if_settings {
336 unsigned int type; /* Type of physical device or protocol */
337 unsigned int size; /* Size of the data allocated by the caller */
338 compat_uptr_t ifs_ifsu; /* union of pointers */
341 struct compat_ifreq {
343 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
346 struct sockaddr ifru_addr;
347 struct sockaddr ifru_dstaddr;
348 struct sockaddr ifru_broadaddr;
349 struct sockaddr ifru_netmask;
350 struct sockaddr ifru_hwaddr;
352 compat_int_t ifru_ivalue;
353 compat_int_t ifru_mtu;
354 struct compat_ifmap ifru_map;
355 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
356 char ifru_newname[IFNAMSIZ];
357 compat_caddr_t ifru_data;
358 struct compat_if_settings ifru_settings;
362 struct compat_ifconf {
363 compat_int_t ifc_len; /* size of buffer */
364 compat_caddr_t ifcbuf;
367 struct compat_robust_list {
371 struct compat_robust_list_head {
372 struct compat_robust_list list;
373 compat_long_t futex_offset;
374 compat_uptr_t list_op_pending;
377 #ifdef CONFIG_COMPAT_OLD_SIGACTION
378 struct compat_old_sigaction {
379 compat_uptr_t sa_handler;
380 compat_old_sigset_t sa_mask;
381 compat_ulong_t sa_flags;
382 compat_uptr_t sa_restorer;
386 struct compat_keyctl_kdf_params {
387 compat_uptr_t hashname;
388 compat_uptr_t otherinfo;
393 struct compat_statfs;
394 struct compat_statfs64;
395 struct compat_old_linux_dirent;
396 struct compat_linux_dirent;
397 struct linux_dirent64;
398 struct compat_msghdr;
399 struct compat_mmsghdr;
400 struct compat_sysinfo;
401 struct compat_sysctl_args;
402 struct compat_kexec_segment;
403 struct compat_mq_attr;
404 struct compat_msgbuf;
406 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
408 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
410 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
411 unsigned long bitmap_size);
412 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
413 unsigned long bitmap_size);
414 int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from);
415 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from);
416 int get_compat_sigevent(struct sigevent *event,
417 const struct compat_sigevent __user *u_event);
419 static inline int old_timeval32_compare(struct old_timeval32 *lhs,
420 struct old_timeval32 *rhs)
422 if (lhs->tv_sec < rhs->tv_sec)
424 if (lhs->tv_sec > rhs->tv_sec)
426 return lhs->tv_usec - rhs->tv_usec;
429 static inline int old_timespec32_compare(struct old_timespec32 *lhs,
430 struct old_timespec32 *rhs)
432 if (lhs->tv_sec < rhs->tv_sec)
434 if (lhs->tv_sec > rhs->tv_sec)
436 return lhs->tv_nsec - rhs->tv_nsec;
439 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
442 * Defined inline such that size can be compile time constant, which avoids
443 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
446 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
449 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
452 switch (_NSIG_WORDS) {
453 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
455 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
457 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
459 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
461 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
463 return copy_to_user(compat, set, size) ? -EFAULT : 0;
467 extern int compat_ptrace_request(struct task_struct *child,
468 compat_long_t request,
469 compat_ulong_t addr, compat_ulong_t data);
471 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
472 compat_ulong_t addr, compat_ulong_t data);
474 struct epoll_event; /* fortunately, this one is fixed-layout */
476 extern ssize_t compat_rw_copy_check_uvector(int type,
477 const struct compat_iovec __user *uvector,
478 unsigned long nr_segs,
479 unsigned long fast_segs, struct iovec *fast_pointer,
480 struct iovec **ret_pointer);
482 extern void __user *compat_alloc_user_space(unsigned long len);
484 int compat_restore_altstack(const compat_stack_t __user *uss);
485 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
486 #define compat_save_altstack_ex(uss, sp) do { \
487 compat_stack_t __user *__uss = uss; \
488 struct task_struct *t = current; \
489 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
490 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
491 put_user_ex(t->sas_ss_size, &__uss->ss_size); \
492 if (t->sas_ss_flags & SS_AUTODISARM) \
497 * These syscall function prototypes are kept in the same order as
498 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
501 * Please note that these prototypes here are only provided for information
502 * purposes, for static analysis, and for linking from the syscall table.
503 * These functions should not be called elsewhere from kernel code.
505 * As the syscall calling convention may be different from the default
506 * for architectures overriding the syscall calling convention, do not
507 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
509 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
510 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
511 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
513 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
514 compat_long_t min_nr,
516 struct io_event __user *events,
517 struct old_timespec32 __user *timeout,
518 const struct __compat_aio_sigset __user *usig);
519 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
520 compat_long_t min_nr,
522 struct io_event __user *events,
523 struct __kernel_timespec __user *timeout,
524 const struct __compat_aio_sigset __user *usig);
527 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
530 asmlinkage long compat_sys_epoll_pwait(int epfd,
531 struct epoll_event __user *events,
532 int maxevents, int timeout,
533 const compat_sigset_t __user *sigmask,
534 compat_size_t sigsetsize);
537 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
539 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
543 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
547 asmlinkage long compat_sys_mount(const char __user *dev_name,
548 const char __user *dir_name,
549 const char __user *type, compat_ulong_t flags,
550 const void __user *data);
553 asmlinkage long compat_sys_statfs(const char __user *pathname,
554 struct compat_statfs __user *buf);
555 asmlinkage long compat_sys_statfs64(const char __user *pathname,
557 struct compat_statfs64 __user *buf);
558 asmlinkage long compat_sys_fstatfs(unsigned int fd,
559 struct compat_statfs __user *buf);
560 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
561 struct compat_statfs64 __user *buf);
562 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
563 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
564 /* No generic prototype for truncate64, ftruncate64, fallocate */
565 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
566 int flags, umode_t mode);
569 asmlinkage long compat_sys_getdents(unsigned int fd,
570 struct compat_linux_dirent __user *dirent,
573 /* fs/read_write.c */
574 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
575 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
576 const struct compat_iovec __user *vec, compat_ulong_t vlen);
577 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
578 const struct compat_iovec __user *vec, compat_ulong_t vlen);
579 /* No generic prototype for pread64 and pwrite64 */
580 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
581 const struct compat_iovec __user *vec,
582 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
583 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
584 const struct compat_iovec __user *vec,
585 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
586 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
587 asmlinkage long compat_sys_preadv64(unsigned long fd,
588 const struct compat_iovec __user *vec,
589 unsigned long vlen, loff_t pos);
592 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
593 asmlinkage long compat_sys_pwritev64(unsigned long fd,
594 const struct compat_iovec __user *vec,
595 unsigned long vlen, loff_t pos);
599 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
600 compat_off_t __user *offset, compat_size_t count);
601 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
602 compat_loff_t __user *offset, compat_size_t count);
605 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
606 compat_ulong_t __user *outp,
607 compat_ulong_t __user *exp,
608 struct old_timespec32 __user *tsp,
610 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
611 compat_ulong_t __user *outp,
612 compat_ulong_t __user *exp,
613 struct __kernel_timespec __user *tsp,
615 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
617 struct old_timespec32 __user *tsp,
618 const compat_sigset_t __user *sigmask,
619 compat_size_t sigsetsize);
620 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
622 struct __kernel_timespec __user *tsp,
623 const compat_sigset_t __user *sigmask,
624 compat_size_t sigsetsize);
627 asmlinkage long compat_sys_signalfd4(int ufd,
628 const compat_sigset_t __user *sigmask,
629 compat_size_t sigsetsize, int flags);
632 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
633 unsigned int nr_segs, unsigned int flags);
636 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
637 const char __user *filename,
638 struct compat_stat __user *statbuf,
640 asmlinkage long compat_sys_newfstat(unsigned int fd,
641 struct compat_stat __user *statbuf);
643 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
646 asmlinkage long compat_sys_waitid(int, compat_pid_t,
647 struct compat_siginfo __user *, int,
648 struct compat_rusage __user *);
654 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
657 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
658 compat_size_t __user *len_ptr);
660 /* kernel/itimer.c */
661 asmlinkage long compat_sys_getitimer(int which,
662 struct old_itimerval32 __user *it);
663 asmlinkage long compat_sys_setitimer(int which,
664 struct old_itimerval32 __user *in,
665 struct old_itimerval32 __user *out);
668 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
669 compat_ulong_t nr_segments,
670 struct compat_kexec_segment __user *,
671 compat_ulong_t flags);
673 /* kernel/posix-timers.c */
674 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
675 struct compat_sigevent __user *timer_event_spec,
676 timer_t __user *created_timer_id);
678 /* kernel/ptrace.c */
679 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
680 compat_long_t addr, compat_long_t data);
682 /* kernel/sched/core.c */
683 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
685 compat_ulong_t __user *user_mask_ptr);
686 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
688 compat_ulong_t __user *user_mask_ptr);
690 /* kernel/signal.c */
691 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
692 compat_stack_t __user *uoss_ptr);
693 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
694 compat_size_t sigsetsize);
695 #ifndef CONFIG_ODD_RT_SIGACTION
696 asmlinkage long compat_sys_rt_sigaction(int,
697 const struct compat_sigaction __user *,
698 struct compat_sigaction __user *,
701 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
702 compat_sigset_t __user *oset,
703 compat_size_t sigsetsize);
704 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
705 compat_size_t sigsetsize);
706 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
707 struct compat_siginfo __user *uinfo,
708 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
709 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
710 struct compat_siginfo __user *uinfo,
711 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
712 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
713 struct compat_siginfo __user *uinfo);
714 /* No generic prototype for rt_sigreturn */
717 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
718 asmlinkage long compat_sys_getrlimit(unsigned int resource,
719 struct compat_rlimit __user *rlim);
720 asmlinkage long compat_sys_setrlimit(unsigned int resource,
721 struct compat_rlimit __user *rlim);
722 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
725 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
726 struct timezone __user *tz);
727 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
728 struct timezone __user *tz);
731 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
734 asmlinkage long compat_sys_mq_open(const char __user *u_name,
735 int oflag, compat_mode_t mode,
736 struct compat_mq_attr __user *u_attr);
737 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
738 const struct compat_sigevent __user *u_notification);
739 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
740 const struct compat_mq_attr __user *u_mqstat,
741 struct compat_mq_attr __user *u_omqstat);
744 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
745 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
746 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
747 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
748 compat_ssize_t msgsz, int msgflg);
751 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
754 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
755 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
758 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
759 unsigned flags, struct sockaddr __user *addr,
760 int __user *addrlen);
761 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
762 char __user *optval, unsigned int optlen);
763 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
764 char __user *optval, int __user *optlen);
765 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
767 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
770 /* mm/filemap.c: No generic prototype for readahead */
772 /* security/keys/keyctl.c */
773 asmlinkage long compat_sys_keyctl(u32 option,
774 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
776 /* arch/example/kernel/sys_example.c */
777 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
778 const compat_uptr_t __user *envp);
780 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
782 /* mm/, CONFIG_MMU only */
783 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
785 compat_ulong_t __user *nmask,
786 compat_ulong_t maxnode, compat_ulong_t flags);
787 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
788 compat_ulong_t __user *nmask,
789 compat_ulong_t maxnode,
791 compat_ulong_t flags);
792 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
793 compat_ulong_t maxnode);
794 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
795 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
796 const compat_ulong_t __user *new_nodes);
797 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
799 const int __user *nodes,
803 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
804 compat_pid_t pid, int sig,
805 struct compat_siginfo __user *uinfo);
806 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
807 unsigned vlen, unsigned int flags,
808 struct __kernel_timespec __user *timeout);
809 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
810 unsigned vlen, unsigned int flags,
811 struct old_timespec32 __user *timeout);
812 asmlinkage long compat_sys_wait4(compat_pid_t pid,
813 compat_uint_t __user *stat_addr, int options,
814 struct compat_rusage __user *ru);
815 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
816 int, const char __user *);
817 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
818 struct file_handle __user *handle,
820 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
821 unsigned vlen, unsigned int flags);
822 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
823 const struct compat_iovec __user *lvec,
824 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
825 compat_ulong_t riovcnt, compat_ulong_t flags);
826 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
827 const struct compat_iovec __user *lvec,
828 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
829 compat_ulong_t riovcnt, compat_ulong_t flags);
830 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
831 const compat_uptr_t __user *argv,
832 const compat_uptr_t __user *envp, int flags);
833 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
834 const struct compat_iovec __user *vec,
835 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
836 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
837 const struct compat_iovec __user *vec,
838 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
839 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
840 asmlinkage long compat_sys_readv64v2(unsigned long fd,
841 const struct compat_iovec __user *vec,
842 unsigned long vlen, loff_t pos, rwf_t flags);
845 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
846 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
847 const struct compat_iovec __user *vec,
848 unsigned long vlen, loff_t pos, rwf_t flags);
853 * Deprecated system calls which are still defined in
854 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
857 /* __ARCH_WANT_SYSCALL_NO_AT */
858 asmlinkage long compat_sys_open(const char __user *filename, int flags,
861 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
862 asmlinkage long compat_sys_signalfd(int ufd,
863 const compat_sigset_t __user *sigmask,
864 compat_size_t sigsetsize);
866 /* __ARCH_WANT_SYSCALL_OFF_T */
867 asmlinkage long compat_sys_newstat(const char __user *filename,
868 struct compat_stat __user *statbuf);
869 asmlinkage long compat_sys_newlstat(const char __user *filename,
870 struct compat_stat __user *statbuf);
872 /* __ARCH_WANT_SYSCALL_DEPRECATED */
873 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
874 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
875 struct old_timeval32 __user *tvp);
876 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
877 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
879 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
881 /* obsolete: fs/readdir.c */
882 asmlinkage long compat_sys_old_readdir(unsigned int fd,
883 struct compat_old_linux_dirent __user *,
886 /* obsolete: fs/select.c */
887 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
890 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
892 /* obsolete: kernel/signal.c */
893 #ifdef __ARCH_WANT_SYS_SIGPENDING
894 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
897 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
898 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
899 compat_old_sigset_t __user *oset);
901 #ifdef CONFIG_COMPAT_OLD_SIGACTION
902 asmlinkage long compat_sys_sigaction(int sig,
903 const struct compat_old_sigaction __user *act,
904 struct compat_old_sigaction __user *oact);
907 /* obsolete: net/socket.c */
908 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
910 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
914 * For most but not all architectures, "am I in a compat syscall?" and
915 * "am I a compat task?" are the same question. For architectures on which
916 * they aren't the same question, arch code can override in_compat_syscall.
919 #ifndef in_compat_syscall
920 static inline bool in_compat_syscall(void) { return is_compat_task(); }
924 * ns_to_old_timeval32 - Compat version of ns_to_timeval
925 * @nsec: the nanoseconds value to be converted
927 * Returns the old_timeval32 representation of the nsec parameter.
929 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
931 struct __kernel_old_timeval tv;
932 struct old_timeval32 ctv;
934 tv = ns_to_kernel_old_timeval(nsec);
935 ctv.tv_sec = tv.tv_sec;
936 ctv.tv_usec = tv.tv_usec;
942 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
943 * directly. Instead, use one of the functions which work equivalently, such
944 * as the kcompat_sys_xyzyyz() functions prototyped below.
947 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
948 struct compat_statfs64 __user * buf);
949 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
950 struct compat_statfs64 __user * buf);
952 #else /* !CONFIG_COMPAT */
954 #define is_compat_task() (0)
955 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
956 #define in_compat_syscall in_compat_syscall
957 static inline bool in_compat_syscall(void) { return false; }
959 #endif /* CONFIG_COMPAT */
961 #endif /* _LINUX_COMPAT_H */