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 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
400 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
402 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
403 unsigned long bitmap_size);
404 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
405 unsigned long bitmap_size);
406 void copy_siginfo_to_external32(struct compat_siginfo *to,
407 const struct kernel_siginfo *from);
408 int copy_siginfo_from_user32(kernel_siginfo_t *to,
409 const struct compat_siginfo __user *from);
410 int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
411 const kernel_siginfo_t *from);
412 #ifndef copy_siginfo_to_user32
413 #define copy_siginfo_to_user32 __copy_siginfo_to_user32
415 int get_compat_sigevent(struct sigevent *event,
416 const struct compat_sigevent __user *u_event);
418 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
421 * Defined inline such that size can be compile time constant, which avoids
422 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
425 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
428 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
429 #if defined(__BIG_ENDIAN) && defined(CONFIG_64BIT)
431 switch (_NSIG_WORDS) {
432 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
434 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
436 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
438 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
440 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
442 return copy_to_user(compat, set, size) ? -EFAULT : 0;
446 #ifdef CONFIG_CPU_BIG_ENDIAN
447 #define unsafe_put_compat_sigset(compat, set, label) do { \
448 compat_sigset_t __user *__c = compat; \
449 const sigset_t *__s = set; \
451 switch (_NSIG_WORDS) { \
453 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \
454 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \
457 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \
458 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \
461 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \
462 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \
465 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \
466 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \
470 #define unsafe_get_compat_sigset(set, compat, label) do { \
471 const compat_sigset_t __user *__c = compat; \
472 compat_sigset_word hi, lo; \
473 sigset_t *__s = set; \
475 switch (_NSIG_WORDS) { \
477 unsafe_get_user(lo, &__c->sig[7], label); \
478 unsafe_get_user(hi, &__c->sig[6], label); \
479 __s->sig[3] = hi | (((long)lo) << 32); \
482 unsafe_get_user(lo, &__c->sig[5], label); \
483 unsafe_get_user(hi, &__c->sig[4], label); \
484 __s->sig[2] = hi | (((long)lo) << 32); \
487 unsafe_get_user(lo, &__c->sig[3], label); \
488 unsafe_get_user(hi, &__c->sig[2], label); \
489 __s->sig[1] = hi | (((long)lo) << 32); \
492 unsafe_get_user(lo, &__c->sig[1], label); \
493 unsafe_get_user(hi, &__c->sig[0], label); \
494 __s->sig[0] = hi | (((long)lo) << 32); \
498 #define unsafe_put_compat_sigset(compat, set, label) do { \
499 compat_sigset_t __user *__c = compat; \
500 const sigset_t *__s = set; \
502 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \
505 #define unsafe_get_compat_sigset(set, compat, label) do { \
506 const compat_sigset_t __user *__c = compat; \
507 sigset_t *__s = set; \
509 unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \
513 extern int compat_ptrace_request(struct task_struct *child,
514 compat_long_t request,
515 compat_ulong_t addr, compat_ulong_t data);
517 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
518 compat_ulong_t addr, compat_ulong_t data);
520 struct epoll_event; /* fortunately, this one is fixed-layout */
522 extern void __user *compat_alloc_user_space(unsigned long len);
524 int compat_restore_altstack(const compat_stack_t __user *uss);
525 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
526 #define unsafe_compat_save_altstack(uss, sp, label) do { \
527 compat_stack_t __user *__uss = uss; \
528 struct task_struct *t = current; \
529 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \
530 &__uss->ss_sp, label); \
531 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \
532 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \
536 * These syscall function prototypes are kept in the same order as
537 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
540 * Please note that these prototypes here are only provided for information
541 * purposes, for static analysis, and for linking from the syscall table.
542 * These functions should not be called elsewhere from kernel code.
544 * As the syscall calling convention may be different from the default
545 * for architectures overriding the syscall calling convention, do not
546 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
548 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
549 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
550 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
552 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
553 compat_long_t min_nr,
555 struct io_event __user *events,
556 struct old_timespec32 __user *timeout,
557 const struct __compat_aio_sigset __user *usig);
558 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
559 compat_long_t min_nr,
561 struct io_event __user *events,
562 struct __kernel_timespec __user *timeout,
563 const struct __compat_aio_sigset __user *usig);
566 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
569 asmlinkage long compat_sys_epoll_pwait(int epfd,
570 struct epoll_event __user *events,
571 int maxevents, int timeout,
572 const compat_sigset_t __user *sigmask,
573 compat_size_t sigsetsize);
574 asmlinkage long compat_sys_epoll_pwait2(int epfd,
575 struct epoll_event __user *events,
577 const struct __kernel_timespec __user *timeout,
578 const compat_sigset_t __user *sigmask,
579 compat_size_t sigsetsize);
582 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
584 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
588 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
592 asmlinkage long compat_sys_statfs(const char __user *pathname,
593 struct compat_statfs __user *buf);
594 asmlinkage long compat_sys_statfs64(const char __user *pathname,
596 struct compat_statfs64 __user *buf);
597 asmlinkage long compat_sys_fstatfs(unsigned int fd,
598 struct compat_statfs __user *buf);
599 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
600 struct compat_statfs64 __user *buf);
601 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
602 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
603 /* No generic prototype for truncate64, ftruncate64, fallocate */
604 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
605 int flags, umode_t mode);
608 asmlinkage long compat_sys_getdents(unsigned int fd,
609 struct compat_linux_dirent __user *dirent,
612 /* fs/read_write.c */
613 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
614 /* No generic prototype for pread64 and pwrite64 */
615 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
616 const struct iovec __user *vec,
617 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
618 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
619 const struct iovec __user *vec,
620 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
621 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
622 asmlinkage long compat_sys_preadv64(unsigned long fd,
623 const struct iovec __user *vec,
624 unsigned long vlen, loff_t pos);
627 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
628 asmlinkage long compat_sys_pwritev64(unsigned long fd,
629 const struct iovec __user *vec,
630 unsigned long vlen, loff_t pos);
634 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
635 compat_off_t __user *offset, compat_size_t count);
636 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
637 compat_loff_t __user *offset, compat_size_t count);
640 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
641 compat_ulong_t __user *outp,
642 compat_ulong_t __user *exp,
643 struct old_timespec32 __user *tsp,
645 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
646 compat_ulong_t __user *outp,
647 compat_ulong_t __user *exp,
648 struct __kernel_timespec __user *tsp,
650 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
652 struct old_timespec32 __user *tsp,
653 const compat_sigset_t __user *sigmask,
654 compat_size_t sigsetsize);
655 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
657 struct __kernel_timespec __user *tsp,
658 const compat_sigset_t __user *sigmask,
659 compat_size_t sigsetsize);
662 asmlinkage long compat_sys_signalfd4(int ufd,
663 const compat_sigset_t __user *sigmask,
664 compat_size_t sigsetsize, int flags);
667 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
668 const char __user *filename,
669 struct compat_stat __user *statbuf,
671 asmlinkage long compat_sys_newfstat(unsigned int fd,
672 struct compat_stat __user *statbuf);
674 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
677 asmlinkage long compat_sys_waitid(int, compat_pid_t,
678 struct compat_siginfo __user *, int,
679 struct compat_rusage __user *);
685 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
688 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
689 compat_size_t __user *len_ptr);
691 /* kernel/itimer.c */
692 asmlinkage long compat_sys_getitimer(int which,
693 struct old_itimerval32 __user *it);
694 asmlinkage long compat_sys_setitimer(int which,
695 struct old_itimerval32 __user *in,
696 struct old_itimerval32 __user *out);
699 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
700 compat_ulong_t nr_segments,
701 struct compat_kexec_segment __user *,
702 compat_ulong_t flags);
704 /* kernel/posix-timers.c */
705 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
706 struct compat_sigevent __user *timer_event_spec,
707 timer_t __user *created_timer_id);
709 /* kernel/ptrace.c */
710 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
711 compat_long_t addr, compat_long_t data);
713 /* kernel/sched/core.c */
714 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
716 compat_ulong_t __user *user_mask_ptr);
717 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
719 compat_ulong_t __user *user_mask_ptr);
721 /* kernel/signal.c */
722 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
723 compat_stack_t __user *uoss_ptr);
724 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
725 compat_size_t sigsetsize);
726 #ifndef CONFIG_ODD_RT_SIGACTION
727 asmlinkage long compat_sys_rt_sigaction(int,
728 const struct compat_sigaction __user *,
729 struct compat_sigaction __user *,
732 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
733 compat_sigset_t __user *oset,
734 compat_size_t sigsetsize);
735 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
736 compat_size_t sigsetsize);
737 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
738 struct compat_siginfo __user *uinfo,
739 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
740 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
741 struct compat_siginfo __user *uinfo,
742 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
743 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
744 struct compat_siginfo __user *uinfo);
745 /* No generic prototype for rt_sigreturn */
748 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
749 asmlinkage long compat_sys_getrlimit(unsigned int resource,
750 struct compat_rlimit __user *rlim);
751 asmlinkage long compat_sys_setrlimit(unsigned int resource,
752 struct compat_rlimit __user *rlim);
753 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
756 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
757 struct timezone __user *tz);
758 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
759 struct timezone __user *tz);
762 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
765 asmlinkage long compat_sys_mq_open(const char __user *u_name,
766 int oflag, compat_mode_t mode,
767 struct compat_mq_attr __user *u_attr);
768 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
769 const struct compat_sigevent __user *u_notification);
770 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
771 const struct compat_mq_attr __user *u_mqstat,
772 struct compat_mq_attr __user *u_omqstat);
775 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
776 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
777 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
778 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
779 compat_ssize_t msgsz, int msgflg);
782 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
785 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
786 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
789 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
790 unsigned flags, struct sockaddr __user *addr,
791 int __user *addrlen);
792 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
794 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
797 /* mm/filemap.c: No generic prototype for readahead */
799 /* security/keys/keyctl.c */
800 asmlinkage long compat_sys_keyctl(u32 option,
801 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
803 /* arch/example/kernel/sys_example.c */
804 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
805 const compat_uptr_t __user *envp);
807 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
809 /* mm/, CONFIG_MMU only */
810 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
812 compat_ulong_t __user *nmask,
813 compat_ulong_t maxnode, compat_ulong_t flags);
814 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
815 compat_ulong_t __user *nmask,
816 compat_ulong_t maxnode,
818 compat_ulong_t flags);
819 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
820 compat_ulong_t maxnode);
821 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
822 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
823 const compat_ulong_t __user *new_nodes);
824 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
826 const int __user *nodes,
830 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
831 compat_pid_t pid, int sig,
832 struct compat_siginfo __user *uinfo);
833 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
834 unsigned vlen, unsigned int flags,
835 struct __kernel_timespec __user *timeout);
836 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
837 unsigned vlen, unsigned int flags,
838 struct old_timespec32 __user *timeout);
839 asmlinkage long compat_sys_wait4(compat_pid_t pid,
840 compat_uint_t __user *stat_addr, int options,
841 struct compat_rusage __user *ru);
842 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
843 int, const char __user *);
844 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
845 struct file_handle __user *handle,
847 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
848 unsigned vlen, unsigned int flags);
849 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
850 const compat_uptr_t __user *argv,
851 const compat_uptr_t __user *envp, int flags);
852 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
853 const struct iovec __user *vec,
854 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
855 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
856 const struct iovec __user *vec,
857 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
858 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
859 asmlinkage long compat_sys_preadv64v2(unsigned long fd,
860 const struct iovec __user *vec,
861 unsigned long vlen, loff_t pos, rwf_t flags);
864 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
865 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
866 const struct iovec __user *vec,
867 unsigned long vlen, loff_t pos, rwf_t flags);
872 * Deprecated system calls which are still defined in
873 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
876 /* __ARCH_WANT_SYSCALL_NO_AT */
877 asmlinkage long compat_sys_open(const char __user *filename, int flags,
880 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
881 asmlinkage long compat_sys_signalfd(int ufd,
882 const compat_sigset_t __user *sigmask,
883 compat_size_t sigsetsize);
885 /* __ARCH_WANT_SYSCALL_OFF_T */
886 asmlinkage long compat_sys_newstat(const char __user *filename,
887 struct compat_stat __user *statbuf);
888 asmlinkage long compat_sys_newlstat(const char __user *filename,
889 struct compat_stat __user *statbuf);
891 /* __ARCH_WANT_SYSCALL_DEPRECATED */
892 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
893 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
894 struct old_timeval32 __user *tvp);
895 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
896 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
899 /* obsolete: fs/readdir.c */
900 asmlinkage long compat_sys_old_readdir(unsigned int fd,
901 struct compat_old_linux_dirent __user *,
904 /* obsolete: fs/select.c */
905 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
908 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
910 /* obsolete: kernel/signal.c */
911 #ifdef __ARCH_WANT_SYS_SIGPENDING
912 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
915 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
916 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
917 compat_old_sigset_t __user *oset);
919 #ifdef CONFIG_COMPAT_OLD_SIGACTION
920 asmlinkage long compat_sys_sigaction(int sig,
921 const struct compat_old_sigaction __user *act,
922 struct compat_old_sigaction __user *oact);
925 /* obsolete: net/socket.c */
926 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
928 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
931 * ns_to_old_timeval32 - Compat version of ns_to_timeval
932 * @nsec: the nanoseconds value to be converted
934 * Returns the old_timeval32 representation of the nsec parameter.
936 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
938 struct __kernel_old_timeval tv;
939 struct old_timeval32 ctv;
941 tv = ns_to_kernel_old_timeval(nsec);
942 ctv.tv_sec = tv.tv_sec;
943 ctv.tv_usec = tv.tv_usec;
949 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
950 * directly. Instead, use one of the functions which work equivalently, such
951 * as the kcompat_sys_xyzyyz() functions prototyped below.
954 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
955 struct compat_statfs64 __user * buf);
956 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
957 struct compat_statfs64 __user * buf);
962 * For most but not all architectures, "am I in a compat syscall?" and
963 * "am I a compat task?" are the same question. For architectures on which
964 * they aren't the same question, arch code can override in_compat_syscall.
966 #ifndef in_compat_syscall
967 static inline bool in_compat_syscall(void) { return is_compat_task(); }
970 #else /* !CONFIG_COMPAT */
972 #define is_compat_task() (0)
973 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
974 #define in_compat_syscall in_compat_syscall
975 static inline bool in_compat_syscall(void) { return false; }
977 #endif /* CONFIG_COMPAT */
980 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit
981 * types, and will need special compat treatment for that. Most architectures
982 * don't need that special handling even for compat syscalls.
984 #ifndef compat_need_64bit_alignment_fixup
985 #define compat_need_64bit_alignment_fixup() false
989 * A pointer passed in from user mode. This should not
990 * be used for syscall parameters, just declare them
991 * as pointers because the syscall entry code will have
992 * appropriately converted them already.
995 static inline void __user *compat_ptr(compat_uptr_t uptr)
997 return (void __user *)(unsigned long)uptr;
1001 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
1003 return (u32)(unsigned long)uptr;
1006 #endif /* _LINUX_COMPAT_H */