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 */
95 compat_uptr_t iov_base;
96 compat_size_t iov_len;
101 #ifndef compat_user_stack_pointer
102 #define compat_user_stack_pointer() current_user_stack_pointer()
104 #ifndef compat_sigaltstack /* we'll need that for MIPS */
105 typedef struct compat_sigaltstack {
108 compat_size_t ss_size;
111 #ifndef COMPAT_MINSIGSTKSZ
112 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ
115 #define compat_jiffies_to_clock_t(x) \
116 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
118 typedef __compat_uid32_t compat_uid_t;
119 typedef __compat_gid32_t compat_gid_t;
121 struct compat_sel_arg_struct;
124 struct old_itimerval32;
127 compat_clock_t tms_utime;
128 compat_clock_t tms_stime;
129 compat_clock_t tms_cutime;
130 compat_clock_t tms_cstime;
133 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
136 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
139 int set_compat_user_sigmask(const compat_sigset_t __user *umask,
142 struct compat_sigaction {
143 #ifndef __ARCH_HAS_IRIX_SIGACTION
144 compat_uptr_t sa_handler;
145 compat_ulong_t sa_flags;
147 compat_uint_t sa_flags;
148 compat_uptr_t sa_handler;
150 #ifdef __ARCH_HAS_SA_RESTORER
151 compat_uptr_t sa_restorer;
153 compat_sigset_t sa_mask __packed;
156 typedef union compat_sigval {
157 compat_int_t sival_int;
158 compat_uptr_t sival_ptr;
161 typedef struct compat_siginfo {
163 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
172 int _pad[128/sizeof(int) - 3];
176 compat_pid_t _pid; /* sender's pid */
177 __compat_uid32_t _uid; /* sender's uid */
180 /* POSIX.1b timers */
182 compat_timer_t _tid; /* timer id */
183 int _overrun; /* overrun count */
184 compat_sigval_t _sigval; /* same as below */
187 /* POSIX.1b signals */
189 compat_pid_t _pid; /* sender's pid */
190 __compat_uid32_t _uid; /* sender's uid */
191 compat_sigval_t _sigval;
196 compat_pid_t _pid; /* which child */
197 __compat_uid32_t _uid; /* sender's uid */
198 int _status; /* exit code */
199 compat_clock_t _utime;
200 compat_clock_t _stime;
203 #ifdef CONFIG_X86_X32_ABI
204 /* SIGCHLD (x32 version) */
206 compat_pid_t _pid; /* which child */
207 __compat_uid32_t _uid; /* sender's uid */
208 int _status; /* exit code */
214 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
216 compat_uptr_t _addr; /* faulting insn/memory ref. */
217 #ifdef __ARCH_SI_TRAPNO
218 int _trapno; /* TRAP # which caused the signal */
220 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
221 sizeof(short) : __alignof__(compat_uptr_t))
224 * used when si_code=BUS_MCEERR_AR or
225 * used when si_code=BUS_MCEERR_AO
227 short int _addr_lsb; /* Valid LSB of the reported address. */
228 /* used when si_code=SEGV_BNDERR */
230 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
231 compat_uptr_t _lower;
232 compat_uptr_t _upper;
234 /* used when si_code=SEGV_PKUERR */
236 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
239 /* used when si_code=TRAP_PERF */
240 compat_ulong_t _perf;
246 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
251 compat_uptr_t _call_addr; /* calling user insn */
252 int _syscall; /* triggering system call number */
253 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
258 struct compat_rlimit {
259 compat_ulong_t rlim_cur;
260 compat_ulong_t rlim_max;
263 struct compat_rusage {
264 struct old_timeval32 ru_utime;
265 struct old_timeval32 ru_stime;
266 compat_long_t ru_maxrss;
267 compat_long_t ru_ixrss;
268 compat_long_t ru_idrss;
269 compat_long_t ru_isrss;
270 compat_long_t ru_minflt;
271 compat_long_t ru_majflt;
272 compat_long_t ru_nswap;
273 compat_long_t ru_inblock;
274 compat_long_t ru_oublock;
275 compat_long_t ru_msgsnd;
276 compat_long_t ru_msgrcv;
277 compat_long_t ru_nsignals;
278 compat_long_t ru_nvcsw;
279 compat_long_t ru_nivcsw;
282 extern int put_compat_rusage(const struct rusage *,
283 struct compat_rusage __user *);
285 struct compat_siginfo;
286 struct __compat_aio_sigset;
288 struct compat_dirent {
295 struct compat_ustat {
296 compat_daddr_t f_tfree;
297 compat_ino_t f_tinode;
302 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
304 typedef struct compat_sigevent {
305 compat_sigval_t sigev_value;
306 compat_int_t sigev_signo;
307 compat_int_t sigev_notify;
309 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
313 compat_uptr_t _function;
314 compat_uptr_t _attribute;
319 struct compat_ifmap {
320 compat_ulong_t mem_start;
321 compat_ulong_t mem_end;
322 unsigned short base_addr;
328 struct compat_if_settings {
329 unsigned int type; /* Type of physical device or protocol */
330 unsigned int size; /* Size of the data allocated by the caller */
331 compat_uptr_t ifs_ifsu; /* union of pointers */
334 struct compat_ifreq {
336 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
339 struct sockaddr ifru_addr;
340 struct sockaddr ifru_dstaddr;
341 struct sockaddr ifru_broadaddr;
342 struct sockaddr ifru_netmask;
343 struct sockaddr ifru_hwaddr;
345 compat_int_t ifru_ivalue;
346 compat_int_t ifru_mtu;
347 struct compat_ifmap ifru_map;
348 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
349 char ifru_newname[IFNAMSIZ];
350 compat_caddr_t ifru_data;
351 struct compat_if_settings ifru_settings;
355 struct compat_ifconf {
356 compat_int_t ifc_len; /* size of buffer */
357 compat_caddr_t ifcbuf;
360 struct compat_robust_list {
364 struct compat_robust_list_head {
365 struct compat_robust_list list;
366 compat_long_t futex_offset;
367 compat_uptr_t list_op_pending;
370 #ifdef CONFIG_COMPAT_OLD_SIGACTION
371 struct compat_old_sigaction {
372 compat_uptr_t sa_handler;
373 compat_old_sigset_t sa_mask;
374 compat_ulong_t sa_flags;
375 compat_uptr_t sa_restorer;
379 struct compat_keyctl_kdf_params {
380 compat_uptr_t hashname;
381 compat_uptr_t otherinfo;
386 struct compat_statfs;
387 struct compat_statfs64;
388 struct compat_old_linux_dirent;
389 struct compat_linux_dirent;
390 struct linux_dirent64;
391 struct compat_msghdr;
392 struct compat_mmsghdr;
393 struct compat_sysinfo;
394 struct compat_sysctl_args;
395 struct compat_kexec_segment;
396 struct compat_mq_attr;
397 struct compat_msgbuf;
399 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
401 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
403 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
404 unsigned long bitmap_size);
405 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
406 unsigned long bitmap_size);
407 void copy_siginfo_to_external32(struct compat_siginfo *to,
408 const struct kernel_siginfo *from);
409 int copy_siginfo_from_user32(kernel_siginfo_t *to,
410 const struct compat_siginfo __user *from);
411 int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
412 const kernel_siginfo_t *from);
413 #ifndef copy_siginfo_to_user32
414 #define copy_siginfo_to_user32 __copy_siginfo_to_user32
416 int get_compat_sigevent(struct sigevent *event,
417 const struct compat_sigevent __user *u_event);
419 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
422 * Defined inline such that size can be compile time constant, which avoids
423 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
426 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
429 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
432 switch (_NSIG_WORDS) {
433 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
435 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
437 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
439 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
441 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
443 return copy_to_user(compat, set, size) ? -EFAULT : 0;
447 #ifdef CONFIG_CPU_BIG_ENDIAN
448 #define unsafe_put_compat_sigset(compat, set, label) do { \
449 compat_sigset_t __user *__c = compat; \
450 const sigset_t *__s = set; \
452 switch (_NSIG_WORDS) { \
454 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \
455 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \
458 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \
459 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \
462 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \
463 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \
466 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \
467 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \
471 #define unsafe_put_compat_sigset(compat, set, label) do { \
472 compat_sigset_t __user *__c = compat; \
473 const sigset_t *__s = set; \
475 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \
479 extern int compat_ptrace_request(struct task_struct *child,
480 compat_long_t request,
481 compat_ulong_t addr, compat_ulong_t data);
483 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
484 compat_ulong_t addr, compat_ulong_t data);
486 struct epoll_event; /* fortunately, this one is fixed-layout */
488 extern void __user *compat_alloc_user_space(unsigned long len);
490 int compat_restore_altstack(const compat_stack_t __user *uss);
491 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
492 #define unsafe_compat_save_altstack(uss, sp, label) do { \
493 compat_stack_t __user *__uss = uss; \
494 struct task_struct *t = current; \
495 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \
496 &__uss->ss_sp, label); \
497 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \
498 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \
499 if (t->sas_ss_flags & SS_AUTODISARM) \
504 * These syscall function prototypes are kept in the same order as
505 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
508 * Please note that these prototypes here are only provided for information
509 * purposes, for static analysis, and for linking from the syscall table.
510 * These functions should not be called elsewhere from kernel code.
512 * As the syscall calling convention may be different from the default
513 * for architectures overriding the syscall calling convention, do not
514 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
516 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
517 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
518 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
520 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
521 compat_long_t min_nr,
523 struct io_event __user *events,
524 struct old_timespec32 __user *timeout,
525 const struct __compat_aio_sigset __user *usig);
526 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
527 compat_long_t min_nr,
529 struct io_event __user *events,
530 struct __kernel_timespec __user *timeout,
531 const struct __compat_aio_sigset __user *usig);
534 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
537 asmlinkage long compat_sys_epoll_pwait(int epfd,
538 struct epoll_event __user *events,
539 int maxevents, int timeout,
540 const compat_sigset_t __user *sigmask,
541 compat_size_t sigsetsize);
542 asmlinkage long compat_sys_epoll_pwait2(int epfd,
543 struct epoll_event __user *events,
545 const struct __kernel_timespec __user *timeout,
546 const compat_sigset_t __user *sigmask,
547 compat_size_t sigsetsize);
550 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
552 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
556 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
560 asmlinkage long compat_sys_statfs(const char __user *pathname,
561 struct compat_statfs __user *buf);
562 asmlinkage long compat_sys_statfs64(const char __user *pathname,
564 struct compat_statfs64 __user *buf);
565 asmlinkage long compat_sys_fstatfs(unsigned int fd,
566 struct compat_statfs __user *buf);
567 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
568 struct compat_statfs64 __user *buf);
569 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
570 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
571 /* No generic prototype for truncate64, ftruncate64, fallocate */
572 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
573 int flags, umode_t mode);
576 asmlinkage long compat_sys_getdents(unsigned int fd,
577 struct compat_linux_dirent __user *dirent,
580 /* fs/read_write.c */
581 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
582 /* No generic prototype for pread64 and pwrite64 */
583 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
584 const struct iovec __user *vec,
585 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
586 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
587 const struct iovec __user *vec,
588 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
589 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
590 asmlinkage long compat_sys_preadv64(unsigned long fd,
591 const struct iovec __user *vec,
592 unsigned long vlen, loff_t pos);
595 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
596 asmlinkage long compat_sys_pwritev64(unsigned long fd,
597 const struct iovec __user *vec,
598 unsigned long vlen, loff_t pos);
602 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
603 compat_off_t __user *offset, compat_size_t count);
604 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
605 compat_loff_t __user *offset, compat_size_t count);
608 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
609 compat_ulong_t __user *outp,
610 compat_ulong_t __user *exp,
611 struct old_timespec32 __user *tsp,
613 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
614 compat_ulong_t __user *outp,
615 compat_ulong_t __user *exp,
616 struct __kernel_timespec __user *tsp,
618 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
620 struct old_timespec32 __user *tsp,
621 const compat_sigset_t __user *sigmask,
622 compat_size_t sigsetsize);
623 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
625 struct __kernel_timespec __user *tsp,
626 const compat_sigset_t __user *sigmask,
627 compat_size_t sigsetsize);
630 asmlinkage long compat_sys_signalfd4(int ufd,
631 const compat_sigset_t __user *sigmask,
632 compat_size_t sigsetsize, int flags);
635 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
636 const char __user *filename,
637 struct compat_stat __user *statbuf,
639 asmlinkage long compat_sys_newfstat(unsigned int fd,
640 struct compat_stat __user *statbuf);
642 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
645 asmlinkage long compat_sys_waitid(int, compat_pid_t,
646 struct compat_siginfo __user *, int,
647 struct compat_rusage __user *);
653 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
656 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
657 compat_size_t __user *len_ptr);
659 /* kernel/itimer.c */
660 asmlinkage long compat_sys_getitimer(int which,
661 struct old_itimerval32 __user *it);
662 asmlinkage long compat_sys_setitimer(int which,
663 struct old_itimerval32 __user *in,
664 struct old_itimerval32 __user *out);
667 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
668 compat_ulong_t nr_segments,
669 struct compat_kexec_segment __user *,
670 compat_ulong_t flags);
672 /* kernel/posix-timers.c */
673 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
674 struct compat_sigevent __user *timer_event_spec,
675 timer_t __user *created_timer_id);
677 /* kernel/ptrace.c */
678 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
679 compat_long_t addr, compat_long_t data);
681 /* kernel/sched/core.c */
682 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
684 compat_ulong_t __user *user_mask_ptr);
685 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
687 compat_ulong_t __user *user_mask_ptr);
689 /* kernel/signal.c */
690 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
691 compat_stack_t __user *uoss_ptr);
692 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
693 compat_size_t sigsetsize);
694 #ifndef CONFIG_ODD_RT_SIGACTION
695 asmlinkage long compat_sys_rt_sigaction(int,
696 const struct compat_sigaction __user *,
697 struct compat_sigaction __user *,
700 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
701 compat_sigset_t __user *oset,
702 compat_size_t sigsetsize);
703 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
704 compat_size_t sigsetsize);
705 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
706 struct compat_siginfo __user *uinfo,
707 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
708 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
709 struct compat_siginfo __user *uinfo,
710 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
711 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
712 struct compat_siginfo __user *uinfo);
713 /* No generic prototype for rt_sigreturn */
716 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
717 asmlinkage long compat_sys_getrlimit(unsigned int resource,
718 struct compat_rlimit __user *rlim);
719 asmlinkage long compat_sys_setrlimit(unsigned int resource,
720 struct compat_rlimit __user *rlim);
721 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
724 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
725 struct timezone __user *tz);
726 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
727 struct timezone __user *tz);
730 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
733 asmlinkage long compat_sys_mq_open(const char __user *u_name,
734 int oflag, compat_mode_t mode,
735 struct compat_mq_attr __user *u_attr);
736 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
737 const struct compat_sigevent __user *u_notification);
738 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
739 const struct compat_mq_attr __user *u_mqstat,
740 struct compat_mq_attr __user *u_omqstat);
743 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
744 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
745 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
746 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
747 compat_ssize_t msgsz, int msgflg);
750 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
753 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
754 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
757 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
758 unsigned flags, struct sockaddr __user *addr,
759 int __user *addrlen);
760 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
762 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
765 /* mm/filemap.c: No generic prototype for readahead */
767 /* security/keys/keyctl.c */
768 asmlinkage long compat_sys_keyctl(u32 option,
769 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
771 /* arch/example/kernel/sys_example.c */
772 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
773 const compat_uptr_t __user *envp);
775 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
777 /* mm/, CONFIG_MMU only */
778 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
780 compat_ulong_t __user *nmask,
781 compat_ulong_t maxnode, compat_ulong_t flags);
782 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
783 compat_ulong_t __user *nmask,
784 compat_ulong_t maxnode,
786 compat_ulong_t flags);
787 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
788 compat_ulong_t maxnode);
789 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
790 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
791 const compat_ulong_t __user *new_nodes);
792 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
794 const int __user *nodes,
798 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
799 compat_pid_t pid, int sig,
800 struct compat_siginfo __user *uinfo);
801 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
802 unsigned vlen, unsigned int flags,
803 struct __kernel_timespec __user *timeout);
804 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
805 unsigned vlen, unsigned int flags,
806 struct old_timespec32 __user *timeout);
807 asmlinkage long compat_sys_wait4(compat_pid_t pid,
808 compat_uint_t __user *stat_addr, int options,
809 struct compat_rusage __user *ru);
810 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
811 int, const char __user *);
812 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
813 struct file_handle __user *handle,
815 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
816 unsigned vlen, unsigned int flags);
817 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
818 const compat_uptr_t __user *argv,
819 const compat_uptr_t __user *envp, int flags);
820 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
821 const struct iovec __user *vec,
822 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
823 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
824 const struct iovec __user *vec,
825 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
826 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
827 asmlinkage long compat_sys_preadv64v2(unsigned long fd,
828 const struct iovec __user *vec,
829 unsigned long vlen, loff_t pos, rwf_t flags);
832 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
833 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
834 const struct iovec __user *vec,
835 unsigned long vlen, loff_t pos, rwf_t flags);
840 * Deprecated system calls which are still defined in
841 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
844 /* __ARCH_WANT_SYSCALL_NO_AT */
845 asmlinkage long compat_sys_open(const char __user *filename, int flags,
848 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
849 asmlinkage long compat_sys_signalfd(int ufd,
850 const compat_sigset_t __user *sigmask,
851 compat_size_t sigsetsize);
853 /* __ARCH_WANT_SYSCALL_OFF_T */
854 asmlinkage long compat_sys_newstat(const char __user *filename,
855 struct compat_stat __user *statbuf);
856 asmlinkage long compat_sys_newlstat(const char __user *filename,
857 struct compat_stat __user *statbuf);
859 /* __ARCH_WANT_SYSCALL_DEPRECATED */
860 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
861 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
862 struct old_timeval32 __user *tvp);
863 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
864 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
867 /* obsolete: fs/readdir.c */
868 asmlinkage long compat_sys_old_readdir(unsigned int fd,
869 struct compat_old_linux_dirent __user *,
872 /* obsolete: fs/select.c */
873 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
876 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
878 /* obsolete: kernel/signal.c */
879 #ifdef __ARCH_WANT_SYS_SIGPENDING
880 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
883 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
884 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
885 compat_old_sigset_t __user *oset);
887 #ifdef CONFIG_COMPAT_OLD_SIGACTION
888 asmlinkage long compat_sys_sigaction(int sig,
889 const struct compat_old_sigaction __user *act,
890 struct compat_old_sigaction __user *oact);
893 /* obsolete: net/socket.c */
894 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
896 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
900 * For most but not all architectures, "am I in a compat syscall?" and
901 * "am I a compat task?" are the same question. For architectures on which
902 * they aren't the same question, arch code can override in_compat_syscall.
905 #ifndef in_compat_syscall
906 static inline bool in_compat_syscall(void) { return is_compat_task(); }
910 * ns_to_old_timeval32 - Compat version of ns_to_timeval
911 * @nsec: the nanoseconds value to be converted
913 * Returns the old_timeval32 representation of the nsec parameter.
915 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
917 struct __kernel_old_timeval tv;
918 struct old_timeval32 ctv;
920 tv = ns_to_kernel_old_timeval(nsec);
921 ctv.tv_sec = tv.tv_sec;
922 ctv.tv_usec = tv.tv_usec;
928 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
929 * directly. Instead, use one of the functions which work equivalently, such
930 * as the kcompat_sys_xyzyyz() functions prototyped below.
933 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
934 struct compat_statfs64 __user * buf);
935 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
936 struct compat_statfs64 __user * buf);
938 #else /* !CONFIG_COMPAT */
940 #define is_compat_task() (0)
941 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
942 #define in_compat_syscall in_compat_syscall
943 static inline bool in_compat_syscall(void) { return false; }
945 #endif /* CONFIG_COMPAT */
948 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit
949 * types, and will need special compat treatment for that. Most architectures
950 * don't need that special handling even for compat syscalls.
952 #ifndef compat_need_64bit_alignment_fixup
953 #define compat_need_64bit_alignment_fixup() false
957 * A pointer passed in from user mode. This should not
958 * be used for syscall parameters, just declare them
959 * as pointers because the syscall entry code will have
960 * appropriately converted them already.
963 static inline void __user *compat_ptr(compat_uptr_t uptr)
965 return (void __user *)(unsigned long)uptr;
969 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
971 return (u32)(unsigned long)uptr;
974 #endif /* _LINUX_COMPAT_H */