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>
23 #include <asm/siginfo.h>
24 #include <asm/signal.h>
26 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
28 * It may be useful for an architecture to override the definitions of the
29 * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular
30 * to use a different calling convention for syscalls. To allow for that,
31 + the prototypes for the compat_sys_*() functions below will *not* be included
32 * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
34 #include <asm/syscall_wrapper.h>
35 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
37 #ifndef COMPAT_USE_64BIT_TIME
38 #define COMPAT_USE_64BIT_TIME 0
42 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
45 #ifndef COMPAT_SYSCALL_DEFINE0
46 #define COMPAT_SYSCALL_DEFINE0(name) \
47 asmlinkage long compat_sys_##name(void); \
48 ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \
49 asmlinkage long compat_sys_##name(void)
50 #endif /* COMPAT_SYSCALL_DEFINE0 */
52 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
53 COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
54 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
55 COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
56 #define COMPAT_SYSCALL_DEFINE3(name, ...) \
57 COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
58 #define COMPAT_SYSCALL_DEFINE4(name, ...) \
59 COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
60 #define COMPAT_SYSCALL_DEFINE5(name, ...) \
61 COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
62 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
63 COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
66 * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which
67 * sign-extends 32-bit ints to longs whenever needed. The actual work is
68 * done within __do_compat_sys_*().
70 #ifndef COMPAT_SYSCALL_DEFINEx
71 #define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
73 __diag_ignore(GCC, 8, "-Wattribute-alias", \
74 "Type aliasing is used to sanitize syscall arguments");\
75 asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
76 __attribute__((alias(__stringify(__se_compat_sys##name)))); \
77 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \
78 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
79 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
80 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
82 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
83 __MAP(x,__SC_TEST,__VA_ARGS__); \
87 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
88 #endif /* COMPAT_SYSCALL_DEFINEx */
91 compat_uptr_t iov_base;
92 compat_size_t iov_len;
95 #ifndef compat_user_stack_pointer
96 #define compat_user_stack_pointer() current_user_stack_pointer()
98 #ifndef compat_sigaltstack /* we'll need that for MIPS */
99 typedef struct compat_sigaltstack {
102 compat_size_t ss_size;
105 #ifndef COMPAT_MINSIGSTKSZ
106 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ
109 #define compat_jiffies_to_clock_t(x) \
110 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
112 typedef __compat_uid32_t compat_uid_t;
113 typedef __compat_gid32_t compat_gid_t;
115 struct compat_sel_arg_struct;
118 struct old_itimerval32;
121 compat_clock_t tms_utime;
122 compat_clock_t tms_stime;
123 compat_clock_t tms_cutime;
124 compat_clock_t tms_cstime;
127 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
129 #ifndef compat_sigset_t
131 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
135 int set_compat_user_sigmask(const compat_sigset_t __user *umask,
138 struct compat_sigaction {
139 #ifndef __ARCH_HAS_IRIX_SIGACTION
140 compat_uptr_t sa_handler;
141 compat_ulong_t sa_flags;
143 compat_uint_t sa_flags;
144 compat_uptr_t sa_handler;
146 #ifdef __ARCH_HAS_SA_RESTORER
147 compat_uptr_t sa_restorer;
149 compat_sigset_t sa_mask __packed;
152 typedef union compat_sigval {
153 compat_int_t sival_int;
154 compat_uptr_t sival_ptr;
157 typedef struct compat_siginfo {
159 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
168 int _pad[128/sizeof(int) - 3];
172 compat_pid_t _pid; /* sender's pid */
173 __compat_uid32_t _uid; /* sender's uid */
176 /* POSIX.1b timers */
178 compat_timer_t _tid; /* timer id */
179 int _overrun; /* overrun count */
180 compat_sigval_t _sigval; /* same as below */
183 /* POSIX.1b signals */
185 compat_pid_t _pid; /* sender's pid */
186 __compat_uid32_t _uid; /* sender's uid */
187 compat_sigval_t _sigval;
192 compat_pid_t _pid; /* which child */
193 __compat_uid32_t _uid; /* sender's uid */
194 int _status; /* exit code */
195 compat_clock_t _utime;
196 compat_clock_t _stime;
199 #ifdef CONFIG_X86_X32_ABI
200 /* SIGCHLD (x32 version) */
202 compat_pid_t _pid; /* which child */
203 __compat_uid32_t _uid; /* sender's uid */
204 int _status; /* exit code */
210 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
212 compat_uptr_t _addr; /* faulting insn/memory ref. */
213 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
214 sizeof(short) : __alignof__(compat_uptr_t))
216 /* used on alpha and sparc */
217 int _trapno; /* TRAP # which caused the signal */
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];
234 /* used when si_code=TRAP_PERF */
236 compat_ulong_t _data;
244 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
249 compat_uptr_t _call_addr; /* calling user insn */
250 int _syscall; /* triggering system call number */
251 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
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;
385 struct compat_statfs;
386 struct compat_statfs64;
387 struct compat_old_linux_dirent;
388 struct compat_linux_dirent;
389 struct linux_dirent64;
390 struct compat_msghdr;
391 struct compat_mmsghdr;
392 struct compat_sysinfo;
393 struct compat_sysctl_args;
394 struct compat_kexec_segment;
395 struct compat_mq_attr;
396 struct compat_msgbuf;
398 void copy_siginfo_to_external32(struct compat_siginfo *to,
399 const struct kernel_siginfo *from);
400 int copy_siginfo_from_user32(kernel_siginfo_t *to,
401 const struct compat_siginfo __user *from);
402 int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
403 const kernel_siginfo_t *from);
404 #ifndef copy_siginfo_to_user32
405 #define copy_siginfo_to_user32 __copy_siginfo_to_user32
407 int get_compat_sigevent(struct sigevent *event,
408 const struct compat_sigevent __user *u_event);
410 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
413 * Defined inline such that size can be compile time constant, which avoids
414 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
417 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
420 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
421 #if defined(__BIG_ENDIAN) && defined(CONFIG_64BIT)
423 switch (_NSIG_WORDS) {
424 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
426 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
428 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
430 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
432 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
434 return copy_to_user(compat, set, size) ? -EFAULT : 0;
438 #ifdef CONFIG_CPU_BIG_ENDIAN
439 #define unsafe_put_compat_sigset(compat, set, label) do { \
440 compat_sigset_t __user *__c = compat; \
441 const sigset_t *__s = set; \
443 switch (_NSIG_WORDS) { \
445 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \
446 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \
449 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \
450 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \
453 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \
454 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \
457 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \
458 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \
462 #define unsafe_get_compat_sigset(set, compat, label) do { \
463 const compat_sigset_t __user *__c = compat; \
464 compat_sigset_word hi, lo; \
465 sigset_t *__s = set; \
467 switch (_NSIG_WORDS) { \
469 unsafe_get_user(lo, &__c->sig[7], label); \
470 unsafe_get_user(hi, &__c->sig[6], label); \
471 __s->sig[3] = hi | (((long)lo) << 32); \
474 unsafe_get_user(lo, &__c->sig[5], label); \
475 unsafe_get_user(hi, &__c->sig[4], label); \
476 __s->sig[2] = hi | (((long)lo) << 32); \
479 unsafe_get_user(lo, &__c->sig[3], label); \
480 unsafe_get_user(hi, &__c->sig[2], label); \
481 __s->sig[1] = hi | (((long)lo) << 32); \
484 unsafe_get_user(lo, &__c->sig[1], label); \
485 unsafe_get_user(hi, &__c->sig[0], label); \
486 __s->sig[0] = hi | (((long)lo) << 32); \
490 #define unsafe_put_compat_sigset(compat, set, label) do { \
491 compat_sigset_t __user *__c = compat; \
492 const sigset_t *__s = set; \
494 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \
497 #define unsafe_get_compat_sigset(set, compat, label) do { \
498 const compat_sigset_t __user *__c = compat; \
499 sigset_t *__s = set; \
501 unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \
505 extern int compat_ptrace_request(struct task_struct *child,
506 compat_long_t request,
507 compat_ulong_t addr, compat_ulong_t data);
509 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
510 compat_ulong_t addr, compat_ulong_t data);
512 struct epoll_event; /* fortunately, this one is fixed-layout */
514 extern void __user *compat_alloc_user_space(unsigned long len);
516 int compat_restore_altstack(const compat_stack_t __user *uss);
517 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
518 #define unsafe_compat_save_altstack(uss, sp, label) do { \
519 compat_stack_t __user *__uss = uss; \
520 struct task_struct *t = current; \
521 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \
522 &__uss->ss_sp, label); \
523 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \
524 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \
528 * These syscall function prototypes are kept in the same order as
529 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
532 * Please note that these prototypes here are only provided for information
533 * purposes, for static analysis, and for linking from the syscall table.
534 * These functions should not be called elsewhere from kernel code.
536 * As the syscall calling convention may be different from the default
537 * for architectures overriding the syscall calling convention, do not
538 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
540 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
541 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
542 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
544 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
545 compat_long_t min_nr,
547 struct io_event __user *events,
548 struct old_timespec32 __user *timeout,
549 const struct __compat_aio_sigset __user *usig);
550 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
551 compat_long_t min_nr,
553 struct io_event __user *events,
554 struct __kernel_timespec __user *timeout,
555 const struct __compat_aio_sigset __user *usig);
558 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
561 asmlinkage long compat_sys_epoll_pwait(int epfd,
562 struct epoll_event __user *events,
563 int maxevents, int timeout,
564 const compat_sigset_t __user *sigmask,
565 compat_size_t sigsetsize);
566 asmlinkage long compat_sys_epoll_pwait2(int epfd,
567 struct epoll_event __user *events,
569 const struct __kernel_timespec __user *timeout,
570 const compat_sigset_t __user *sigmask,
571 compat_size_t sigsetsize);
574 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
576 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
580 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
584 asmlinkage long compat_sys_statfs(const char __user *pathname,
585 struct compat_statfs __user *buf);
586 asmlinkage long compat_sys_statfs64(const char __user *pathname,
588 struct compat_statfs64 __user *buf);
589 asmlinkage long compat_sys_fstatfs(unsigned int fd,
590 struct compat_statfs __user *buf);
591 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
592 struct compat_statfs64 __user *buf);
593 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
594 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
595 /* No generic prototype for truncate64, ftruncate64, fallocate */
596 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
597 int flags, umode_t mode);
600 asmlinkage long compat_sys_getdents(unsigned int fd,
601 struct compat_linux_dirent __user *dirent,
604 /* fs/read_write.c */
605 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
606 /* No generic prototype for pread64 and pwrite64 */
607 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
608 const struct iovec __user *vec,
609 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
610 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
611 const struct iovec __user *vec,
612 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
613 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
614 asmlinkage long compat_sys_preadv64(unsigned long fd,
615 const struct iovec __user *vec,
616 unsigned long vlen, loff_t pos);
619 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
620 asmlinkage long compat_sys_pwritev64(unsigned long fd,
621 const struct iovec __user *vec,
622 unsigned long vlen, loff_t pos);
626 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
627 compat_off_t __user *offset, compat_size_t count);
628 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
629 compat_loff_t __user *offset, compat_size_t count);
632 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
633 compat_ulong_t __user *outp,
634 compat_ulong_t __user *exp,
635 struct old_timespec32 __user *tsp,
637 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
638 compat_ulong_t __user *outp,
639 compat_ulong_t __user *exp,
640 struct __kernel_timespec __user *tsp,
642 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
644 struct old_timespec32 __user *tsp,
645 const compat_sigset_t __user *sigmask,
646 compat_size_t sigsetsize);
647 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
649 struct __kernel_timespec __user *tsp,
650 const compat_sigset_t __user *sigmask,
651 compat_size_t sigsetsize);
654 asmlinkage long compat_sys_signalfd4(int ufd,
655 const compat_sigset_t __user *sigmask,
656 compat_size_t sigsetsize, int flags);
659 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
660 const char __user *filename,
661 struct compat_stat __user *statbuf,
663 asmlinkage long compat_sys_newfstat(unsigned int fd,
664 struct compat_stat __user *statbuf);
666 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
669 asmlinkage long compat_sys_waitid(int, compat_pid_t,
670 struct compat_siginfo __user *, int,
671 struct compat_rusage __user *);
677 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
680 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
681 compat_size_t __user *len_ptr);
683 /* kernel/itimer.c */
684 asmlinkage long compat_sys_getitimer(int which,
685 struct old_itimerval32 __user *it);
686 asmlinkage long compat_sys_setitimer(int which,
687 struct old_itimerval32 __user *in,
688 struct old_itimerval32 __user *out);
691 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
692 compat_ulong_t nr_segments,
693 struct compat_kexec_segment __user *,
694 compat_ulong_t flags);
696 /* kernel/posix-timers.c */
697 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
698 struct compat_sigevent __user *timer_event_spec,
699 timer_t __user *created_timer_id);
701 /* kernel/ptrace.c */
702 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
703 compat_long_t addr, compat_long_t data);
705 /* kernel/sched/core.c */
706 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
708 compat_ulong_t __user *user_mask_ptr);
709 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
711 compat_ulong_t __user *user_mask_ptr);
713 /* kernel/signal.c */
714 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
715 compat_stack_t __user *uoss_ptr);
716 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
717 compat_size_t sigsetsize);
718 #ifndef CONFIG_ODD_RT_SIGACTION
719 asmlinkage long compat_sys_rt_sigaction(int,
720 const struct compat_sigaction __user *,
721 struct compat_sigaction __user *,
724 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
725 compat_sigset_t __user *oset,
726 compat_size_t sigsetsize);
727 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
728 compat_size_t sigsetsize);
729 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
730 struct compat_siginfo __user *uinfo,
731 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
732 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
733 struct compat_siginfo __user *uinfo,
734 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
735 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
736 struct compat_siginfo __user *uinfo);
737 /* No generic prototype for rt_sigreturn */
740 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
741 asmlinkage long compat_sys_getrlimit(unsigned int resource,
742 struct compat_rlimit __user *rlim);
743 asmlinkage long compat_sys_setrlimit(unsigned int resource,
744 struct compat_rlimit __user *rlim);
745 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
748 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
749 struct timezone __user *tz);
750 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
751 struct timezone __user *tz);
754 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
757 asmlinkage long compat_sys_mq_open(const char __user *u_name,
758 int oflag, compat_mode_t mode,
759 struct compat_mq_attr __user *u_attr);
760 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
761 const struct compat_sigevent __user *u_notification);
762 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
763 const struct compat_mq_attr __user *u_mqstat,
764 struct compat_mq_attr __user *u_omqstat);
767 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
768 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
769 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
770 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
771 compat_ssize_t msgsz, int msgflg);
774 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
777 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
778 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
781 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
782 unsigned flags, struct sockaddr __user *addr,
783 int __user *addrlen);
784 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
786 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
789 /* mm/filemap.c: No generic prototype for readahead */
791 /* security/keys/keyctl.c */
792 asmlinkage long compat_sys_keyctl(u32 option,
793 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
795 /* arch/example/kernel/sys_example.c */
796 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
797 const compat_uptr_t __user *envp);
799 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
801 /* mm/, CONFIG_MMU only */
802 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
804 compat_ulong_t __user *nmask,
805 compat_ulong_t maxnode, compat_ulong_t flags);
806 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
807 compat_ulong_t __user *nmask,
808 compat_ulong_t maxnode,
810 compat_ulong_t flags);
811 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
812 compat_ulong_t maxnode);
813 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
814 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
815 const compat_ulong_t __user *new_nodes);
816 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
818 const int __user *nodes,
822 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
823 compat_pid_t pid, int sig,
824 struct compat_siginfo __user *uinfo);
825 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
826 unsigned vlen, unsigned int flags,
827 struct __kernel_timespec __user *timeout);
828 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
829 unsigned vlen, unsigned int flags,
830 struct old_timespec32 __user *timeout);
831 asmlinkage long compat_sys_wait4(compat_pid_t pid,
832 compat_uint_t __user *stat_addr, int options,
833 struct compat_rusage __user *ru);
834 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
835 int, const char __user *);
836 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
837 struct file_handle __user *handle,
839 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
840 unsigned vlen, unsigned int flags);
841 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
842 const compat_uptr_t __user *argv,
843 const compat_uptr_t __user *envp, int flags);
844 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
845 const struct iovec __user *vec,
846 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
847 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
848 const struct iovec __user *vec,
849 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
850 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
851 asmlinkage long compat_sys_preadv64v2(unsigned long fd,
852 const struct iovec __user *vec,
853 unsigned long vlen, loff_t pos, rwf_t flags);
856 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
857 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
858 const struct iovec __user *vec,
859 unsigned long vlen, loff_t pos, rwf_t flags);
864 * Deprecated system calls which are still defined in
865 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
868 /* __ARCH_WANT_SYSCALL_NO_AT */
869 asmlinkage long compat_sys_open(const char __user *filename, int flags,
872 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
873 asmlinkage long compat_sys_signalfd(int ufd,
874 const compat_sigset_t __user *sigmask,
875 compat_size_t sigsetsize);
877 /* __ARCH_WANT_SYSCALL_OFF_T */
878 asmlinkage long compat_sys_newstat(const char __user *filename,
879 struct compat_stat __user *statbuf);
880 asmlinkage long compat_sys_newlstat(const char __user *filename,
881 struct compat_stat __user *statbuf);
883 /* __ARCH_WANT_SYSCALL_DEPRECATED */
884 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
885 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
886 struct old_timeval32 __user *tvp);
887 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
888 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
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 */
923 * ns_to_old_timeval32 - Compat version of ns_to_timeval
924 * @nsec: the nanoseconds value to be converted
926 * Returns the old_timeval32 representation of the nsec parameter.
928 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
930 struct __kernel_old_timeval tv;
931 struct old_timeval32 ctv;
933 tv = ns_to_kernel_old_timeval(nsec);
934 ctv.tv_sec = tv.tv_sec;
935 ctv.tv_usec = tv.tv_usec;
941 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
942 * directly. Instead, use one of the functions which work equivalently, such
943 * as the kcompat_sys_xyzyyz() functions prototyped below.
946 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
947 struct compat_statfs64 __user * buf);
948 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
949 struct compat_statfs64 __user * buf);
954 * For most but not all architectures, "am I in a compat syscall?" and
955 * "am I a compat task?" are the same question. For architectures on which
956 * they aren't the same question, arch code can override in_compat_syscall.
958 #ifndef in_compat_syscall
959 static inline bool in_compat_syscall(void) { return is_compat_task(); }
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 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
973 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
975 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
976 unsigned long bitmap_size);
977 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
978 unsigned long bitmap_size);
981 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit
982 * types, and will need special compat treatment for that. Most architectures
983 * don't need that special handling even for compat syscalls.
985 #ifndef compat_need_64bit_alignment_fixup
986 #define compat_need_64bit_alignment_fixup() false
990 * A pointer passed in from user mode. This should not
991 * be used for syscall parameters, just declare them
992 * as pointers because the syscall entry code will have
993 * appropriately converted them already.
996 static inline void __user *compat_ptr(compat_uptr_t uptr)
998 return (void __user *)(unsigned long)uptr;
1002 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
1004 return (u32)(unsigned long)uptr;
1007 #endif /* _LINUX_COMPAT_H */