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/compat_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;
107 #define compat_jiffies_to_clock_t(x) \
108 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
110 typedef __compat_uid32_t compat_uid_t;
111 typedef __compat_gid32_t compat_gid_t;
113 typedef compat_ulong_t compat_aio_context_t;
115 struct compat_sel_arg_struct;
118 struct compat_itimerspec {
119 struct compat_timespec it_interval;
120 struct compat_timespec it_value;
123 struct compat_utimbuf {
124 compat_time_t actime;
125 compat_time_t modtime;
128 struct compat_itimerval {
129 struct compat_timeval it_interval;
130 struct compat_timeval it_value;
134 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
135 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
138 compat_clock_t tms_utime;
139 compat_clock_t tms_stime;
140 compat_clock_t tms_cutime;
141 compat_clock_t tms_cstime;
144 struct compat_timex {
146 compat_long_t offset;
148 compat_long_t maxerror;
149 compat_long_t esterror;
151 compat_long_t constant;
152 compat_long_t precision;
153 compat_long_t tolerance;
154 struct compat_timeval time;
156 compat_long_t ppsfreq;
157 compat_long_t jitter;
159 compat_long_t stabil;
160 compat_long_t jitcnt;
161 compat_long_t calcnt;
162 compat_long_t errcnt;
163 compat_long_t stbcnt;
166 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
167 compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
168 compat_int_t:32; compat_int_t:32; compat_int_t:32;
172 int compat_get_timex(struct timex *, const struct compat_timex __user *);
173 int compat_put_timex(struct compat_timex __user *, const struct timex *);
175 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
178 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
181 struct compat_sigaction {
182 #ifndef __ARCH_HAS_IRIX_SIGACTION
183 compat_uptr_t sa_handler;
184 compat_ulong_t sa_flags;
186 compat_uint_t sa_flags;
187 compat_uptr_t sa_handler;
189 #ifdef __ARCH_HAS_SA_RESTORER
190 compat_uptr_t sa_restorer;
192 compat_sigset_t sa_mask __packed;
195 typedef union compat_sigval {
196 compat_int_t sival_int;
197 compat_uptr_t sival_ptr;
200 typedef struct compat_siginfo {
202 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
211 int _pad[128/sizeof(int) - 3];
215 compat_pid_t _pid; /* sender's pid */
216 __compat_uid32_t _uid; /* sender's uid */
219 /* POSIX.1b timers */
221 compat_timer_t _tid; /* timer id */
222 int _overrun; /* overrun count */
223 compat_sigval_t _sigval; /* same as below */
226 /* POSIX.1b signals */
228 compat_pid_t _pid; /* sender's pid */
229 __compat_uid32_t _uid; /* sender's uid */
230 compat_sigval_t _sigval;
235 compat_pid_t _pid; /* which child */
236 __compat_uid32_t _uid; /* sender's uid */
237 int _status; /* exit code */
238 compat_clock_t _utime;
239 compat_clock_t _stime;
242 #ifdef CONFIG_X86_X32_ABI
243 /* SIGCHLD (x32 version) */
245 compat_pid_t _pid; /* which child */
246 __compat_uid32_t _uid; /* sender's uid */
247 int _status; /* exit code */
253 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
255 compat_uptr_t _addr; /* faulting insn/memory ref. */
256 #ifdef __ARCH_SI_TRAPNO
257 int _trapno; /* TRAP # which caused the signal */
259 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
260 sizeof(short) : __alignof__(compat_uptr_t))
263 * used when si_code=BUS_MCEERR_AR or
264 * used when si_code=BUS_MCEERR_AO
266 short int _addr_lsb; /* Valid LSB of the reported address. */
267 /* used when si_code=SEGV_BNDERR */
269 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
270 compat_uptr_t _lower;
271 compat_uptr_t _upper;
273 /* used when si_code=SEGV_PKUERR */
275 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
283 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
288 compat_uptr_t _call_addr; /* calling user insn */
289 int _syscall; /* triggering system call number */
290 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
296 * These functions operate on 32- or 64-bit specs depending on
297 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
299 extern int compat_get_timespec(struct timespec *, const void __user *);
300 extern int compat_put_timespec(const struct timespec *, void __user *);
301 extern int compat_get_timeval(struct timeval *, const void __user *);
302 extern int compat_put_timeval(const struct timeval *, void __user *);
303 extern int get_compat_itimerspec64(struct itimerspec64 *its,
304 const struct compat_itimerspec __user *uits);
305 extern int put_compat_itimerspec64(const struct itimerspec64 *its,
306 struct compat_itimerspec __user *uits);
308 struct compat_iovec {
309 compat_uptr_t iov_base;
310 compat_size_t iov_len;
313 struct compat_rlimit {
314 compat_ulong_t rlim_cur;
315 compat_ulong_t rlim_max;
318 struct compat_rusage {
319 struct compat_timeval ru_utime;
320 struct compat_timeval ru_stime;
321 compat_long_t ru_maxrss;
322 compat_long_t ru_ixrss;
323 compat_long_t ru_idrss;
324 compat_long_t ru_isrss;
325 compat_long_t ru_minflt;
326 compat_long_t ru_majflt;
327 compat_long_t ru_nswap;
328 compat_long_t ru_inblock;
329 compat_long_t ru_oublock;
330 compat_long_t ru_msgsnd;
331 compat_long_t ru_msgrcv;
332 compat_long_t ru_nsignals;
333 compat_long_t ru_nvcsw;
334 compat_long_t ru_nivcsw;
337 extern int put_compat_rusage(const struct rusage *,
338 struct compat_rusage __user *);
340 struct compat_siginfo;
341 struct __compat_aio_sigset;
343 struct compat_dirent {
350 struct compat_ustat {
351 compat_daddr_t f_tfree;
352 compat_ino_t f_tinode;
357 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
359 typedef struct compat_sigevent {
360 compat_sigval_t sigev_value;
361 compat_int_t sigev_signo;
362 compat_int_t sigev_notify;
364 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
368 compat_uptr_t _function;
369 compat_uptr_t _attribute;
374 struct compat_ifmap {
375 compat_ulong_t mem_start;
376 compat_ulong_t mem_end;
377 unsigned short base_addr;
383 struct compat_if_settings {
384 unsigned int type; /* Type of physical device or protocol */
385 unsigned int size; /* Size of the data allocated by the caller */
386 compat_uptr_t ifs_ifsu; /* union of pointers */
389 struct compat_ifreq {
391 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
394 struct sockaddr ifru_addr;
395 struct sockaddr ifru_dstaddr;
396 struct sockaddr ifru_broadaddr;
397 struct sockaddr ifru_netmask;
398 struct sockaddr ifru_hwaddr;
400 compat_int_t ifru_ivalue;
401 compat_int_t ifru_mtu;
402 struct compat_ifmap ifru_map;
403 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
404 char ifru_newname[IFNAMSIZ];
405 compat_caddr_t ifru_data;
406 struct compat_if_settings ifru_settings;
410 struct compat_ifconf {
411 compat_int_t ifc_len; /* size of buffer */
412 compat_caddr_t ifcbuf;
415 struct compat_robust_list {
419 struct compat_robust_list_head {
420 struct compat_robust_list list;
421 compat_long_t futex_offset;
422 compat_uptr_t list_op_pending;
425 #ifdef CONFIG_COMPAT_OLD_SIGACTION
426 struct compat_old_sigaction {
427 compat_uptr_t sa_handler;
428 compat_old_sigset_t sa_mask;
429 compat_ulong_t sa_flags;
430 compat_uptr_t sa_restorer;
434 struct compat_keyctl_kdf_params {
435 compat_uptr_t hashname;
436 compat_uptr_t otherinfo;
441 struct compat_statfs;
442 struct compat_statfs64;
443 struct compat_old_linux_dirent;
444 struct compat_linux_dirent;
445 struct linux_dirent64;
446 struct compat_msghdr;
447 struct compat_mmsghdr;
448 struct compat_sysinfo;
449 struct compat_sysctl_args;
450 struct compat_kexec_segment;
451 struct compat_mq_attr;
452 struct compat_msgbuf;
454 extern void compat_exit_robust_list(struct task_struct *curr);
456 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
458 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
460 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
461 unsigned long bitmap_size);
462 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
463 unsigned long bitmap_size);
464 int copy_siginfo_from_user32(siginfo_t *to, const struct compat_siginfo __user *from);
465 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from);
466 int get_compat_sigevent(struct sigevent *event,
467 const struct compat_sigevent __user *u_event);
469 static inline int compat_timeval_compare(struct compat_timeval *lhs,
470 struct compat_timeval *rhs)
472 if (lhs->tv_sec < rhs->tv_sec)
474 if (lhs->tv_sec > rhs->tv_sec)
476 return lhs->tv_usec - rhs->tv_usec;
479 static inline int compat_timespec_compare(struct compat_timespec *lhs,
480 struct compat_timespec *rhs)
482 if (lhs->tv_sec < rhs->tv_sec)
484 if (lhs->tv_sec > rhs->tv_sec)
486 return lhs->tv_nsec - rhs->tv_nsec;
489 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
492 * Defined inline such that size can be compile time constant, which avoids
493 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
496 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
499 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
502 switch (_NSIG_WORDS) {
503 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
504 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
505 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
506 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
508 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
510 return copy_to_user(compat, set, size) ? -EFAULT : 0;
514 extern int compat_ptrace_request(struct task_struct *child,
515 compat_long_t request,
516 compat_ulong_t addr, compat_ulong_t data);
518 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
519 compat_ulong_t addr, compat_ulong_t data);
521 struct epoll_event; /* fortunately, this one is fixed-layout */
523 extern ssize_t compat_rw_copy_check_uvector(int type,
524 const struct compat_iovec __user *uvector,
525 unsigned long nr_segs,
526 unsigned long fast_segs, struct iovec *fast_pointer,
527 struct iovec **ret_pointer);
529 extern void __user *compat_alloc_user_space(unsigned long len);
531 int compat_restore_altstack(const compat_stack_t __user *uss);
532 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
533 #define compat_save_altstack_ex(uss, sp) do { \
534 compat_stack_t __user *__uss = uss; \
535 struct task_struct *t = current; \
536 put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
537 put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
538 put_user_ex(t->sas_ss_size, &__uss->ss_size); \
539 if (t->sas_ss_flags & SS_AUTODISARM) \
544 * These syscall function prototypes are kept in the same order as
545 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
548 * Please note that these prototypes here are only provided for information
549 * purposes, for static analysis, and for linking from the syscall table.
550 * These functions should not be called elsewhere from kernel code.
552 * As the syscall calling convention may be different from the default
553 * for architectures overriding the syscall calling convention, do not
554 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
556 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
557 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
558 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
560 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
561 compat_long_t min_nr,
563 struct io_event __user *events,
564 struct compat_timespec __user *timeout);
565 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
566 compat_long_t min_nr,
568 struct io_event __user *events,
569 struct compat_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 compat_timespec __user *tsp,
656 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
658 struct compat_timespec __user *tsp,
659 const compat_sigset_t __user *sigmask,
660 compat_size_t sigsetsize);
663 asmlinkage long compat_sys_signalfd4(int ufd,
664 const compat_sigset_t __user *sigmask,
665 compat_size_t sigsetsize, int flags);
668 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
669 unsigned int nr_segs, unsigned int flags);
672 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
673 const char __user *filename,
674 struct compat_stat __user *statbuf,
676 asmlinkage long compat_sys_newfstat(unsigned int fd,
677 struct compat_stat __user *statbuf);
679 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
682 asmlinkage long compat_sys_timerfd_gettime(int ufd,
683 struct compat_itimerspec __user *otmr);
684 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
685 const struct compat_itimerspec __user *utmr,
686 struct compat_itimerspec __user *otmr);
689 asmlinkage long compat_sys_utimensat(unsigned int dfd,
690 const char __user *filename,
691 struct compat_timespec __user *t,
695 asmlinkage long compat_sys_waitid(int, compat_pid_t,
696 struct compat_siginfo __user *, int,
697 struct compat_rusage __user *);
702 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
703 struct compat_timespec __user *utime, u32 __user *uaddr2,
706 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
709 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
710 compat_size_t __user *len_ptr);
712 /* kernel/hrtimer.c */
713 asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
714 struct compat_timespec __user *rmtp);
716 /* kernel/itimer.c */
717 asmlinkage long compat_sys_getitimer(int which,
718 struct compat_itimerval __user *it);
719 asmlinkage long compat_sys_setitimer(int which,
720 struct compat_itimerval __user *in,
721 struct compat_itimerval __user *out);
724 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
725 compat_ulong_t nr_segments,
726 struct compat_kexec_segment __user *,
727 compat_ulong_t flags);
729 /* kernel/posix-timers.c */
730 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
731 struct compat_sigevent __user *timer_event_spec,
732 timer_t __user *created_timer_id);
733 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
734 struct compat_itimerspec __user *setting);
735 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
736 struct compat_itimerspec __user *new,
737 struct compat_itimerspec __user *old);
738 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
739 struct compat_timespec __user *tp);
740 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
741 struct compat_timespec __user *tp);
742 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
743 struct compat_timespec __user *tp);
744 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
745 struct compat_timespec __user *rqtp,
746 struct compat_timespec __user *rmtp);
748 /* kernel/ptrace.c */
749 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
750 compat_long_t addr, compat_long_t data);
752 /* kernel/sched/core.c */
753 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
755 compat_ulong_t __user *user_mask_ptr);
756 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
758 compat_ulong_t __user *user_mask_ptr);
759 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
760 struct compat_timespec __user *interval);
762 /* kernel/signal.c */
763 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
764 compat_stack_t __user *uoss_ptr);
765 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
766 compat_size_t sigsetsize);
767 #ifndef CONFIG_ODD_RT_SIGACTION
768 asmlinkage long compat_sys_rt_sigaction(int,
769 const struct compat_sigaction __user *,
770 struct compat_sigaction __user *,
773 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
774 compat_sigset_t __user *oset,
775 compat_size_t sigsetsize);
776 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
777 compat_size_t sigsetsize);
778 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
779 struct compat_siginfo __user *uinfo,
780 struct compat_timespec __user *uts, compat_size_t sigsetsize);
781 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
782 struct compat_siginfo __user *uinfo);
783 /* No generic prototype for rt_sigreturn */
786 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
787 asmlinkage long compat_sys_getrlimit(unsigned int resource,
788 struct compat_rlimit __user *rlim);
789 asmlinkage long compat_sys_setrlimit(unsigned int resource,
790 struct compat_rlimit __user *rlim);
791 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
794 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
795 struct timezone __user *tz);
796 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
797 struct timezone __user *tz);
798 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
801 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
804 asmlinkage long compat_sys_mq_open(const char __user *u_name,
805 int oflag, compat_mode_t mode,
806 struct compat_mq_attr __user *u_attr);
807 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
808 const char __user *u_msg_ptr,
809 compat_size_t msg_len, unsigned int msg_prio,
810 const struct compat_timespec __user *u_abs_timeout);
811 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
812 char __user *u_msg_ptr,
813 compat_size_t msg_len, unsigned int __user *u_msg_prio,
814 const struct compat_timespec __user *u_abs_timeout);
815 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
816 const struct compat_sigevent __user *u_notification);
817 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
818 const struct compat_mq_attr __user *u_mqstat,
819 struct compat_mq_attr __user *u_omqstat);
822 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
823 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
824 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
825 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
826 compat_ssize_t msgsz, int msgflg);
829 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
830 asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
831 unsigned nsems, const struct compat_timespec __user *timeout);
834 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
835 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
838 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
839 unsigned flags, struct sockaddr __user *addr,
840 int __user *addrlen);
841 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
842 char __user *optval, unsigned int optlen);
843 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
844 char __user *optval, int __user *optlen);
845 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
847 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
850 /* mm/filemap.c: No generic prototype for readahead */
852 /* security/keys/keyctl.c */
853 asmlinkage long compat_sys_keyctl(u32 option,
854 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
856 /* arch/example/kernel/sys_example.c */
857 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
858 const compat_uptr_t __user *envp);
860 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
862 /* mm/, CONFIG_MMU only */
863 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
865 compat_ulong_t __user *nmask,
866 compat_ulong_t maxnode, compat_ulong_t flags);
867 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
868 compat_ulong_t __user *nmask,
869 compat_ulong_t maxnode,
871 compat_ulong_t flags);
872 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
873 compat_ulong_t maxnode);
874 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
875 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
876 const compat_ulong_t __user *new_nodes);
877 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
879 const int __user *nodes,
883 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
884 compat_pid_t pid, int sig,
885 struct compat_siginfo __user *uinfo);
886 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
887 unsigned vlen, unsigned int flags,
888 struct compat_timespec __user *timeout);
889 asmlinkage long compat_sys_wait4(compat_pid_t pid,
890 compat_uint_t __user *stat_addr, int options,
891 struct compat_rusage __user *ru);
892 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
893 int, const char __user *);
894 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
895 struct file_handle __user *handle,
897 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
898 struct compat_timex __user *tp);
899 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
900 unsigned vlen, unsigned int flags);
901 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
902 const struct compat_iovec __user *lvec,
903 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
904 compat_ulong_t riovcnt, compat_ulong_t flags);
905 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
906 const struct compat_iovec __user *lvec,
907 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
908 compat_ulong_t riovcnt, compat_ulong_t flags);
909 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
910 const compat_uptr_t __user *argv,
911 const compat_uptr_t __user *envp, int flags);
912 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
913 const struct compat_iovec __user *vec,
914 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
915 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
916 const struct compat_iovec __user *vec,
917 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
918 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
919 asmlinkage long compat_sys_readv64v2(unsigned long fd,
920 const struct compat_iovec __user *vec,
921 unsigned long vlen, loff_t pos, rwf_t flags);
924 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
925 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
926 const struct compat_iovec __user *vec,
927 unsigned long vlen, loff_t pos, rwf_t flags);
932 * Deprecated system calls which are still defined in
933 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
936 /* __ARCH_WANT_SYSCALL_NO_AT */
937 asmlinkage long compat_sys_open(const char __user *filename, int flags,
939 asmlinkage long compat_sys_utimes(const char __user *filename,
940 struct compat_timeval __user *t);
942 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
943 asmlinkage long compat_sys_signalfd(int ufd,
944 const compat_sigset_t __user *sigmask,
945 compat_size_t sigsetsize);
947 /* __ARCH_WANT_SYSCALL_OFF_T */
948 asmlinkage long compat_sys_newstat(const char __user *filename,
949 struct compat_stat __user *statbuf);
950 asmlinkage long compat_sys_newlstat(const char __user *filename,
951 struct compat_stat __user *statbuf);
953 /* __ARCH_WANT_SYSCALL_DEPRECATED */
954 asmlinkage long compat_sys_time(compat_time_t __user *tloc);
955 asmlinkage long compat_sys_utime(const char __user *filename,
956 struct compat_utimbuf __user *t);
957 asmlinkage long compat_sys_futimesat(unsigned int dfd,
958 const char __user *filename,
959 struct compat_timeval __user *t);
960 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
961 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
962 struct compat_timeval __user *tvp);
963 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
964 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
966 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
968 /* obsolete: fs/readdir.c */
969 asmlinkage long compat_sys_old_readdir(unsigned int fd,
970 struct compat_old_linux_dirent __user *,
973 /* obsolete: fs/select.c */
974 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
977 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
979 /* obsolete: kernel/signal.c */
980 #ifdef __ARCH_WANT_SYS_SIGPENDING
981 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
984 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
985 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
986 compat_old_sigset_t __user *oset);
988 #ifdef CONFIG_COMPAT_OLD_SIGACTION
989 asmlinkage long compat_sys_sigaction(int sig,
990 const struct compat_old_sigaction __user *act,
991 struct compat_old_sigaction __user *oact);
994 /* obsolete: kernel/time/time.c */
995 asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
997 /* obsolete: net/socket.c */
998 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
1000 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
1004 * For most but not all architectures, "am I in a compat syscall?" and
1005 * "am I a compat task?" are the same question. For architectures on which
1006 * they aren't the same question, arch code can override in_compat_syscall.
1009 #ifndef in_compat_syscall
1010 static inline bool in_compat_syscall(void) { return is_compat_task(); }
1014 * ns_to_compat_timeval - Compat version of ns_to_timeval
1015 * @nsec: the nanoseconds value to be converted
1017 * Returns the compat_timeval representation of the nsec parameter.
1019 static inline struct compat_timeval ns_to_compat_timeval(s64 nsec)
1022 struct compat_timeval ctv;
1024 tv = ns_to_timeval(nsec);
1025 ctv.tv_sec = tv.tv_sec;
1026 ctv.tv_usec = tv.tv_usec;
1031 #else /* !CONFIG_COMPAT */
1033 #define is_compat_task() (0)
1034 #ifndef in_compat_syscall
1035 static inline bool in_compat_syscall(void) { return false; }
1038 #endif /* CONFIG_COMPAT */
1040 #endif /* _LINUX_COMPAT_H */