1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_COMPAT_H
3 #define _LINUX_COMPAT_H
5 * These are the type definitions for the architecture specific
6 * syscall compatibility layer.
9 #include <linux/types.h>
10 #include <linux/time.h>
12 #include <linux/stat.h>
13 #include <linux/param.h> /* for HZ */
14 #include <linux/sem.h>
15 #include <linux/socket.h>
18 #include <linux/aio_abi.h> /* for aio_context_t */
19 #include <linux/uaccess.h>
20 #include <linux/unistd.h>
22 #include <asm/compat.h>
25 #include <asm/siginfo.h>
26 #include <asm/signal.h>
29 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
31 * It may be useful for an architecture to override the definitions of the
32 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular
33 * to use a different calling convention for syscalls. To allow for that,
34 + the prototypes for the compat_sys_*() functions below will *not* be included
35 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
37 #include <asm/syscall_wrapper.h>
38 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
40 #ifndef COMPAT_USE_64BIT_TIME
41 #define COMPAT_USE_64BIT_TIME 0
45 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
48 #ifndef COMPAT_SYSCALL_DEFINE0
49 #define COMPAT_SYSCALL_DEFINE0(name) \
50 asmlinkage long compat_sys_##name(void); \
51 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \
52 asmlinkage long compat_sys_##name(void)
53 #endif /* COMPAT_SYSCALL_DEFINE0 */
55 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
56 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
57 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
58 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
59 #define COMPAT_SYSCALL_DEFINE3(name, ...) \
60 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
61 #define COMPAT_SYSCALL_DEFINE4(name, ...) \
62 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
63 #define COMPAT_SYSCALL_DEFINE5(name, ...) \
64 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
65 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
66 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
69 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which
70 * sign-extends 32-bit ints to longs whenever needed. The actual work is
71 * done within __do_compat_sys_*().
73 #ifndef COMPAT_SYSCALL_DEFINEx
74 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
76 __diag_ignore(GCC, 8, "-Wattribute-alias", \
77 "Type aliasing is used to sanitize syscall arguments");\
78 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
79 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
80 __attribute__((alias(__stringify(__se_compat_sys##name)))); \
81 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \
82 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
83 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
84 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
86 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
87 __MAP(x,__SC_TEST,__VA_ARGS__); \
91 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
92 #endif /* COMPAT_SYSCALL_DEFINEx */
96 #ifndef compat_user_stack_pointer
97 #define compat_user_stack_pointer() current_user_stack_pointer()
99 #ifndef compat_sigaltstack /* we'll need that for MIPS */
100 typedef struct compat_sigaltstack {
103 compat_size_t ss_size;
106 #ifndef COMPAT_MINSIGSTKSZ
107 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ
110 #define compat_jiffies_to_clock_t(x) \
111 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
113 typedef __compat_uid32_t compat_uid_t;
114 typedef __compat_gid32_t compat_gid_t;
116 struct compat_sel_arg_struct;
119 struct old_itimerval32;
122 compat_clock_t tms_utime;
123 compat_clock_t tms_stime;
124 compat_clock_t tms_cutime;
125 compat_clock_t tms_cstime;
128 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
131 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
134 int set_compat_user_sigmask(const compat_sigset_t __user *umask,
137 struct compat_sigaction {
138 #ifndef __ARCH_HAS_IRIX_SIGACTION
139 compat_uptr_t sa_handler;
140 compat_ulong_t sa_flags;
142 compat_uint_t sa_flags;
143 compat_uptr_t sa_handler;
145 #ifdef __ARCH_HAS_SA_RESTORER
146 compat_uptr_t sa_restorer;
148 compat_sigset_t sa_mask __packed;
151 typedef union compat_sigval {
152 compat_int_t sival_int;
153 compat_uptr_t sival_ptr;
156 typedef struct compat_siginfo {
158 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
167 int _pad[128/sizeof(int) - 3];
171 compat_pid_t _pid; /* sender's pid */
172 __compat_uid32_t _uid; /* sender's uid */
175 /* POSIX.1b timers */
177 compat_timer_t _tid; /* timer id */
178 int _overrun; /* overrun count */
179 compat_sigval_t _sigval; /* same as below */
182 /* POSIX.1b signals */
184 compat_pid_t _pid; /* sender's pid */
185 __compat_uid32_t _uid; /* sender's uid */
186 compat_sigval_t _sigval;
191 compat_pid_t _pid; /* which child */
192 __compat_uid32_t _uid; /* sender's uid */
193 int _status; /* exit code */
194 compat_clock_t _utime;
195 compat_clock_t _stime;
198 #ifdef CONFIG_X86_X32_ABI
199 /* SIGCHLD (x32 version) */
201 compat_pid_t _pid; /* which child */
202 __compat_uid32_t _uid; /* sender's uid */
203 int _status; /* exit code */
209 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
211 compat_uptr_t _addr; /* faulting insn/memory ref. */
212 #ifdef __ARCH_SI_TRAPNO
213 int _trapno; /* TRAP # which caused the signal */
215 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
216 sizeof(short) : __alignof__(compat_uptr_t))
219 * used when si_code=BUS_MCEERR_AR or
220 * used when si_code=BUS_MCEERR_AO
222 short int _addr_lsb; /* Valid LSB of the reported address. */
223 /* used when si_code=SEGV_BNDERR */
225 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
226 compat_uptr_t _lower;
227 compat_uptr_t _upper;
229 /* used when si_code=SEGV_PKUERR */
231 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
239 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
244 compat_uptr_t _call_addr; /* calling user insn */
245 int _syscall; /* triggering system call number */
246 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
251 struct compat_iovec {
252 compat_uptr_t iov_base;
253 compat_size_t iov_len;
256 struct compat_rlimit {
257 compat_ulong_t rlim_cur;
258 compat_ulong_t rlim_max;
261 struct compat_rusage {
262 struct old_timeval32 ru_utime;
263 struct old_timeval32 ru_stime;
264 compat_long_t ru_maxrss;
265 compat_long_t ru_ixrss;
266 compat_long_t ru_idrss;
267 compat_long_t ru_isrss;
268 compat_long_t ru_minflt;
269 compat_long_t ru_majflt;
270 compat_long_t ru_nswap;
271 compat_long_t ru_inblock;
272 compat_long_t ru_oublock;
273 compat_long_t ru_msgsnd;
274 compat_long_t ru_msgrcv;
275 compat_long_t ru_nsignals;
276 compat_long_t ru_nvcsw;
277 compat_long_t ru_nivcsw;
280 extern int put_compat_rusage(const struct rusage *,
281 struct compat_rusage __user *);
283 struct compat_siginfo;
284 struct __compat_aio_sigset;
286 struct compat_dirent {
293 struct compat_ustat {
294 compat_daddr_t f_tfree;
295 compat_ino_t f_tinode;
300 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
302 typedef struct compat_sigevent {
303 compat_sigval_t sigev_value;
304 compat_int_t sigev_signo;
305 compat_int_t sigev_notify;
307 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
311 compat_uptr_t _function;
312 compat_uptr_t _attribute;
317 struct compat_ifmap {
318 compat_ulong_t mem_start;
319 compat_ulong_t mem_end;
320 unsigned short base_addr;
326 struct compat_if_settings {
327 unsigned int type; /* Type of physical device or protocol */
328 unsigned int size; /* Size of the data allocated by the caller */
329 compat_uptr_t ifs_ifsu; /* union of pointers */
332 struct compat_ifreq {
334 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
337 struct sockaddr ifru_addr;
338 struct sockaddr ifru_dstaddr;
339 struct sockaddr ifru_broadaddr;
340 struct sockaddr ifru_netmask;
341 struct sockaddr ifru_hwaddr;
343 compat_int_t ifru_ivalue;
344 compat_int_t ifru_mtu;
345 struct compat_ifmap ifru_map;
346 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
347 char ifru_newname[IFNAMSIZ];
348 compat_caddr_t ifru_data;
349 struct compat_if_settings ifru_settings;
353 struct compat_ifconf {
354 compat_int_t ifc_len; /* size of buffer */
355 compat_caddr_t ifcbuf;
358 struct compat_robust_list {
362 struct compat_robust_list_head {
363 struct compat_robust_list list;
364 compat_long_t futex_offset;
365 compat_uptr_t list_op_pending;
368 #ifdef CONFIG_COMPAT_OLD_SIGACTION
369 struct compat_old_sigaction {
370 compat_uptr_t sa_handler;
371 compat_old_sigset_t sa_mask;
372 compat_ulong_t sa_flags;
373 compat_uptr_t sa_restorer;
377 struct compat_keyctl_kdf_params {
378 compat_uptr_t hashname;
379 compat_uptr_t otherinfo;
384 struct compat_statfs;
385 struct compat_statfs64;
386 struct compat_old_linux_dirent;
387 struct compat_linux_dirent;
388 struct linux_dirent64;
389 struct compat_msghdr;
390 struct compat_mmsghdr;
391 struct compat_sysinfo;
392 struct compat_sysctl_args;
393 struct compat_kexec_segment;
394 struct compat_mq_attr;
395 struct compat_msgbuf;
397 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
399 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
401 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
402 unsigned long bitmap_size);
403 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
404 unsigned long bitmap_size);
405 void copy_siginfo_to_external32(struct compat_siginfo *to,
406 const struct kernel_siginfo *from);
407 int copy_siginfo_from_user32(kernel_siginfo_t *to,
408 const struct compat_siginfo __user *from);
409 int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
410 const kernel_siginfo_t *from);
411 #ifndef copy_siginfo_to_user32
412 #define copy_siginfo_to_user32 __copy_siginfo_to_user32
414 int get_compat_sigevent(struct sigevent *event,
415 const struct compat_sigevent __user *u_event);
417 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
420 * Defined inline such that size can be compile time constant, which avoids
421 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
424 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
427 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
430 switch (_NSIG_WORDS) {
431 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
433 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
435 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
437 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
439 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
441 return copy_to_user(compat, set, size) ? -EFAULT : 0;
445 extern int compat_ptrace_request(struct task_struct *child,
446 compat_long_t request,
447 compat_ulong_t addr, compat_ulong_t data);
449 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
450 compat_ulong_t addr, compat_ulong_t data);
452 struct epoll_event; /* fortunately, this one is fixed-layout */
454 extern ssize_t compat_rw_copy_check_uvector(int type,
455 const struct compat_iovec __user *uvector,
456 unsigned long nr_segs,
457 unsigned long fast_segs, struct iovec *fast_pointer,
458 struct iovec **ret_pointer);
460 extern void __user *compat_alloc_user_space(unsigned long len);
462 int compat_restore_altstack(const compat_stack_t __user *uss);
463 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
464 #define unsafe_compat_save_altstack(uss, sp, label) do { \
465 compat_stack_t __user *__uss = uss; \
466 struct task_struct *t = current; \
467 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \
468 &__uss->ss_sp, label); \
469 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \
470 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \
471 if (t->sas_ss_flags & SS_AUTODISARM) \
476 * These syscall function prototypes are kept in the same order as
477 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
480 * Please note that these prototypes here are only provided for information
481 * purposes, for static analysis, and for linking from the syscall table.
482 * These functions should not be called elsewhere from kernel code.
484 * As the syscall calling convention may be different from the default
485 * for architectures overriding the syscall calling convention, do not
486 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
488 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
489 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
490 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
492 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
493 compat_long_t min_nr,
495 struct io_event __user *events,
496 struct old_timespec32 __user *timeout,
497 const struct __compat_aio_sigset __user *usig);
498 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
499 compat_long_t min_nr,
501 struct io_event __user *events,
502 struct __kernel_timespec __user *timeout,
503 const struct __compat_aio_sigset __user *usig);
506 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
509 asmlinkage long compat_sys_epoll_pwait(int epfd,
510 struct epoll_event __user *events,
511 int maxevents, int timeout,
512 const compat_sigset_t __user *sigmask,
513 compat_size_t sigsetsize);
516 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
518 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
522 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
526 asmlinkage long compat_sys_mount(const char __user *dev_name,
527 const char __user *dir_name,
528 const char __user *type, compat_ulong_t flags,
529 const void __user *data);
532 asmlinkage long compat_sys_statfs(const char __user *pathname,
533 struct compat_statfs __user *buf);
534 asmlinkage long compat_sys_statfs64(const char __user *pathname,
536 struct compat_statfs64 __user *buf);
537 asmlinkage long compat_sys_fstatfs(unsigned int fd,
538 struct compat_statfs __user *buf);
539 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
540 struct compat_statfs64 __user *buf);
541 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
542 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
543 /* No generic prototype for truncate64, ftruncate64, fallocate */
544 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
545 int flags, umode_t mode);
548 asmlinkage long compat_sys_getdents(unsigned int fd,
549 struct compat_linux_dirent __user *dirent,
552 /* fs/read_write.c */
553 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
554 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
555 const struct compat_iovec __user *vec, compat_ulong_t vlen);
556 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
557 const struct compat_iovec __user *vec, compat_ulong_t vlen);
558 /* No generic prototype for pread64 and pwrite64 */
559 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
560 const struct compat_iovec __user *vec,
561 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
562 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
563 const struct compat_iovec __user *vec,
564 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
565 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
566 asmlinkage long compat_sys_preadv64(unsigned long fd,
567 const struct compat_iovec __user *vec,
568 unsigned long vlen, loff_t pos);
571 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
572 asmlinkage long compat_sys_pwritev64(unsigned long fd,
573 const struct compat_iovec __user *vec,
574 unsigned long vlen, loff_t pos);
578 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
579 compat_off_t __user *offset, compat_size_t count);
580 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
581 compat_loff_t __user *offset, compat_size_t count);
584 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
585 compat_ulong_t __user *outp,
586 compat_ulong_t __user *exp,
587 struct old_timespec32 __user *tsp,
589 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
590 compat_ulong_t __user *outp,
591 compat_ulong_t __user *exp,
592 struct __kernel_timespec __user *tsp,
594 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
596 struct old_timespec32 __user *tsp,
597 const compat_sigset_t __user *sigmask,
598 compat_size_t sigsetsize);
599 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
601 struct __kernel_timespec __user *tsp,
602 const compat_sigset_t __user *sigmask,
603 compat_size_t sigsetsize);
606 asmlinkage long compat_sys_signalfd4(int ufd,
607 const compat_sigset_t __user *sigmask,
608 compat_size_t sigsetsize, int flags);
611 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
612 unsigned int nr_segs, unsigned int flags);
615 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
616 const char __user *filename,
617 struct compat_stat __user *statbuf,
619 asmlinkage long compat_sys_newfstat(unsigned int fd,
620 struct compat_stat __user *statbuf);
622 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
625 asmlinkage long compat_sys_waitid(int, compat_pid_t,
626 struct compat_siginfo __user *, int,
627 struct compat_rusage __user *);
633 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
636 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
637 compat_size_t __user *len_ptr);
639 /* kernel/itimer.c */
640 asmlinkage long compat_sys_getitimer(int which,
641 struct old_itimerval32 __user *it);
642 asmlinkage long compat_sys_setitimer(int which,
643 struct old_itimerval32 __user *in,
644 struct old_itimerval32 __user *out);
647 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
648 compat_ulong_t nr_segments,
649 struct compat_kexec_segment __user *,
650 compat_ulong_t flags);
652 /* kernel/posix-timers.c */
653 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
654 struct compat_sigevent __user *timer_event_spec,
655 timer_t __user *created_timer_id);
657 /* kernel/ptrace.c */
658 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
659 compat_long_t addr, compat_long_t data);
661 /* kernel/sched/core.c */
662 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
664 compat_ulong_t __user *user_mask_ptr);
665 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
667 compat_ulong_t __user *user_mask_ptr);
669 /* kernel/signal.c */
670 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
671 compat_stack_t __user *uoss_ptr);
672 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
673 compat_size_t sigsetsize);
674 #ifndef CONFIG_ODD_RT_SIGACTION
675 asmlinkage long compat_sys_rt_sigaction(int,
676 const struct compat_sigaction __user *,
677 struct compat_sigaction __user *,
680 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
681 compat_sigset_t __user *oset,
682 compat_size_t sigsetsize);
683 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
684 compat_size_t sigsetsize);
685 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
686 struct compat_siginfo __user *uinfo,
687 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
688 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
689 struct compat_siginfo __user *uinfo,
690 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
691 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
692 struct compat_siginfo __user *uinfo);
693 /* No generic prototype for rt_sigreturn */
696 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
697 asmlinkage long compat_sys_getrlimit(unsigned int resource,
698 struct compat_rlimit __user *rlim);
699 asmlinkage long compat_sys_setrlimit(unsigned int resource,
700 struct compat_rlimit __user *rlim);
701 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
704 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
705 struct timezone __user *tz);
706 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
707 struct timezone __user *tz);
710 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
713 asmlinkage long compat_sys_mq_open(const char __user *u_name,
714 int oflag, compat_mode_t mode,
715 struct compat_mq_attr __user *u_attr);
716 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
717 const struct compat_sigevent __user *u_notification);
718 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
719 const struct compat_mq_attr __user *u_mqstat,
720 struct compat_mq_attr __user *u_omqstat);
723 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
724 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
725 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
726 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
727 compat_ssize_t msgsz, int msgflg);
730 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
733 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
734 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
737 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
738 unsigned flags, struct sockaddr __user *addr,
739 int __user *addrlen);
740 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
742 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
745 /* mm/filemap.c: No generic prototype for readahead */
747 /* security/keys/keyctl.c */
748 asmlinkage long compat_sys_keyctl(u32 option,
749 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
751 /* arch/example/kernel/sys_example.c */
752 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
753 const compat_uptr_t __user *envp);
755 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
757 /* mm/, CONFIG_MMU only */
758 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
760 compat_ulong_t __user *nmask,
761 compat_ulong_t maxnode, compat_ulong_t flags);
762 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
763 compat_ulong_t __user *nmask,
764 compat_ulong_t maxnode,
766 compat_ulong_t flags);
767 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
768 compat_ulong_t maxnode);
769 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
770 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
771 const compat_ulong_t __user *new_nodes);
772 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
774 const int __user *nodes,
778 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
779 compat_pid_t pid, int sig,
780 struct compat_siginfo __user *uinfo);
781 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
782 unsigned vlen, unsigned int flags,
783 struct __kernel_timespec __user *timeout);
784 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
785 unsigned vlen, unsigned int flags,
786 struct old_timespec32 __user *timeout);
787 asmlinkage long compat_sys_wait4(compat_pid_t pid,
788 compat_uint_t __user *stat_addr, int options,
789 struct compat_rusage __user *ru);
790 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
791 int, const char __user *);
792 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
793 struct file_handle __user *handle,
795 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
796 unsigned vlen, unsigned int flags);
797 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
798 const struct compat_iovec __user *lvec,
799 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
800 compat_ulong_t riovcnt, compat_ulong_t flags);
801 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
802 const struct compat_iovec __user *lvec,
803 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
804 compat_ulong_t riovcnt, compat_ulong_t flags);
805 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
806 const compat_uptr_t __user *argv,
807 const compat_uptr_t __user *envp, int flags);
808 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
809 const struct compat_iovec __user *vec,
810 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
811 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
812 const struct compat_iovec __user *vec,
813 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
814 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
815 asmlinkage long compat_sys_readv64v2(unsigned long fd,
816 const struct compat_iovec __user *vec,
817 unsigned long vlen, loff_t pos, rwf_t flags);
820 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
821 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
822 const struct compat_iovec __user *vec,
823 unsigned long vlen, loff_t pos, rwf_t flags);
828 * Deprecated system calls which are still defined in
829 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
832 /* __ARCH_WANT_SYSCALL_NO_AT */
833 asmlinkage long compat_sys_open(const char __user *filename, int flags,
836 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
837 asmlinkage long compat_sys_signalfd(int ufd,
838 const compat_sigset_t __user *sigmask,
839 compat_size_t sigsetsize);
841 /* __ARCH_WANT_SYSCALL_OFF_T */
842 asmlinkage long compat_sys_newstat(const char __user *filename,
843 struct compat_stat __user *statbuf);
844 asmlinkage long compat_sys_newlstat(const char __user *filename,
845 struct compat_stat __user *statbuf);
847 /* __ARCH_WANT_SYSCALL_DEPRECATED */
848 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
849 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
850 struct old_timeval32 __user *tvp);
851 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
852 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
855 /* obsolete: fs/readdir.c */
856 asmlinkage long compat_sys_old_readdir(unsigned int fd,
857 struct compat_old_linux_dirent __user *,
860 /* obsolete: fs/select.c */
861 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
864 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
866 /* obsolete: kernel/signal.c */
867 #ifdef __ARCH_WANT_SYS_SIGPENDING
868 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
871 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
872 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
873 compat_old_sigset_t __user *oset);
875 #ifdef CONFIG_COMPAT_OLD_SIGACTION
876 asmlinkage long compat_sys_sigaction(int sig,
877 const struct compat_old_sigaction __user *act,
878 struct compat_old_sigaction __user *oact);
881 /* obsolete: net/socket.c */
882 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
884 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
888 * For most but not all architectures, "am I in a compat syscall?" and
889 * "am I a compat task?" are the same question. For architectures on which
890 * they aren't the same question, arch code can override in_compat_syscall.
893 #ifndef in_compat_syscall
894 static inline bool in_compat_syscall(void) { return is_compat_task(); }
898 * ns_to_old_timeval32 - Compat version of ns_to_timeval
899 * @nsec: the nanoseconds value to be converted
901 * Returns the old_timeval32 representation of the nsec parameter.
903 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
905 struct __kernel_old_timeval tv;
906 struct old_timeval32 ctv;
908 tv = ns_to_kernel_old_timeval(nsec);
909 ctv.tv_sec = tv.tv_sec;
910 ctv.tv_usec = tv.tv_usec;
916 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
917 * directly. Instead, use one of the functions which work equivalently, such
918 * as the kcompat_sys_xyzyyz() functions prototyped below.
921 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
922 struct compat_statfs64 __user * buf);
923 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
924 struct compat_statfs64 __user * buf);
926 #else /* !CONFIG_COMPAT */
928 #define is_compat_task() (0)
929 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
930 #define in_compat_syscall in_compat_syscall
931 static inline bool in_compat_syscall(void) { return false; }
933 #endif /* CONFIG_COMPAT */
936 * A pointer passed in from user mode. This should not
937 * be used for syscall parameters, just declare them
938 * as pointers because the syscall entry code will have
939 * appropriately converted them already.
942 static inline void __user *compat_ptr(compat_uptr_t uptr)
944 return (void __user *)(unsigned long)uptr;
948 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
950 return (u32)(unsigned long)uptr;
953 #endif /* _LINUX_COMPAT_H */