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 __attribute__((alias(__stringify(__se_compat_sys##name)))); \
80 ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \
81 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
82 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
83 asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
85 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
86 __MAP(x,__SC_TEST,__VA_ARGS__); \
90 static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
91 #endif /* COMPAT_SYSCALL_DEFINEx */
94 compat_uptr_t iov_base;
95 compat_size_t iov_len;
100 #ifndef compat_user_stack_pointer
101 #define compat_user_stack_pointer() current_user_stack_pointer()
103 #ifndef compat_sigaltstack /* we'll need that for MIPS */
104 typedef struct compat_sigaltstack {
107 compat_size_t ss_size;
110 #ifndef COMPAT_MINSIGSTKSZ
111 #define COMPAT_MINSIGSTKSZ MINSIGSTKSZ
114 #define compat_jiffies_to_clock_t(x) \
115 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
117 typedef __compat_uid32_t compat_uid_t;
118 typedef __compat_gid32_t compat_gid_t;
120 struct compat_sel_arg_struct;
123 struct old_itimerval32;
126 compat_clock_t tms_utime;
127 compat_clock_t tms_stime;
128 compat_clock_t tms_cutime;
129 compat_clock_t tms_cstime;
132 #define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
135 compat_sigset_word sig[_COMPAT_NSIG_WORDS];
138 int set_compat_user_sigmask(const compat_sigset_t __user *umask,
141 struct compat_sigaction {
142 #ifndef __ARCH_HAS_IRIX_SIGACTION
143 compat_uptr_t sa_handler;
144 compat_ulong_t sa_flags;
146 compat_uint_t sa_flags;
147 compat_uptr_t sa_handler;
149 #ifdef __ARCH_HAS_SA_RESTORER
150 compat_uptr_t sa_restorer;
152 compat_sigset_t sa_mask __packed;
155 typedef union compat_sigval {
156 compat_int_t sival_int;
157 compat_uptr_t sival_ptr;
160 typedef struct compat_siginfo {
162 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
171 int _pad[128/sizeof(int) - 3];
175 compat_pid_t _pid; /* sender's pid */
176 __compat_uid32_t _uid; /* sender's uid */
179 /* POSIX.1b timers */
181 compat_timer_t _tid; /* timer id */
182 int _overrun; /* overrun count */
183 compat_sigval_t _sigval; /* same as below */
186 /* POSIX.1b signals */
188 compat_pid_t _pid; /* sender's pid */
189 __compat_uid32_t _uid; /* sender's uid */
190 compat_sigval_t _sigval;
195 compat_pid_t _pid; /* which child */
196 __compat_uid32_t _uid; /* sender's uid */
197 int _status; /* exit code */
198 compat_clock_t _utime;
199 compat_clock_t _stime;
202 #ifdef CONFIG_X86_X32_ABI
203 /* SIGCHLD (x32 version) */
205 compat_pid_t _pid; /* which child */
206 __compat_uid32_t _uid; /* sender's uid */
207 int _status; /* exit code */
213 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
215 compat_uptr_t _addr; /* faulting insn/memory ref. */
216 #define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
217 sizeof(short) : __alignof__(compat_uptr_t))
219 /* used on alpha and sparc */
220 int _trapno; /* TRAP # which caused the signal */
222 * used when si_code=BUS_MCEERR_AR or
223 * used when si_code=BUS_MCEERR_AO
225 short int _addr_lsb; /* Valid LSB of the reported address. */
226 /* used when si_code=SEGV_BNDERR */
228 char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
229 compat_uptr_t _lower;
230 compat_uptr_t _upper;
232 /* used when si_code=SEGV_PKUERR */
234 char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
237 /* used when si_code=TRAP_PERF */
239 compat_ulong_t _data;
247 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
252 compat_uptr_t _call_addr; /* calling user insn */
253 int _syscall; /* triggering system call number */
254 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
259 struct compat_rlimit {
260 compat_ulong_t rlim_cur;
261 compat_ulong_t rlim_max;
264 struct compat_rusage {
265 struct old_timeval32 ru_utime;
266 struct old_timeval32 ru_stime;
267 compat_long_t ru_maxrss;
268 compat_long_t ru_ixrss;
269 compat_long_t ru_idrss;
270 compat_long_t ru_isrss;
271 compat_long_t ru_minflt;
272 compat_long_t ru_majflt;
273 compat_long_t ru_nswap;
274 compat_long_t ru_inblock;
275 compat_long_t ru_oublock;
276 compat_long_t ru_msgsnd;
277 compat_long_t ru_msgrcv;
278 compat_long_t ru_nsignals;
279 compat_long_t ru_nvcsw;
280 compat_long_t ru_nivcsw;
283 extern int put_compat_rusage(const struct rusage *,
284 struct compat_rusage __user *);
286 struct compat_siginfo;
287 struct __compat_aio_sigset;
289 struct compat_dirent {
296 struct compat_ustat {
297 compat_daddr_t f_tfree;
298 compat_ino_t f_tinode;
303 #define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
305 typedef struct compat_sigevent {
306 compat_sigval_t sigev_value;
307 compat_int_t sigev_signo;
308 compat_int_t sigev_notify;
310 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
314 compat_uptr_t _function;
315 compat_uptr_t _attribute;
320 struct compat_ifmap {
321 compat_ulong_t mem_start;
322 compat_ulong_t mem_end;
323 unsigned short base_addr;
329 struct compat_if_settings {
330 unsigned int type; /* Type of physical device or protocol */
331 unsigned int size; /* Size of the data allocated by the caller */
332 compat_uptr_t ifs_ifsu; /* union of pointers */
335 struct compat_ifreq {
337 char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
340 struct sockaddr ifru_addr;
341 struct sockaddr ifru_dstaddr;
342 struct sockaddr ifru_broadaddr;
343 struct sockaddr ifru_netmask;
344 struct sockaddr ifru_hwaddr;
346 compat_int_t ifru_ivalue;
347 compat_int_t ifru_mtu;
348 struct compat_ifmap ifru_map;
349 char ifru_slave[IFNAMSIZ]; /* Just fits the size */
350 char ifru_newname[IFNAMSIZ];
351 compat_caddr_t ifru_data;
352 struct compat_if_settings ifru_settings;
356 struct compat_ifconf {
357 compat_int_t ifc_len; /* size of buffer */
358 compat_caddr_t ifcbuf;
361 struct compat_robust_list {
365 struct compat_robust_list_head {
366 struct compat_robust_list list;
367 compat_long_t futex_offset;
368 compat_uptr_t list_op_pending;
371 #ifdef CONFIG_COMPAT_OLD_SIGACTION
372 struct compat_old_sigaction {
373 compat_uptr_t sa_handler;
374 compat_old_sigset_t sa_mask;
375 compat_ulong_t sa_flags;
376 compat_uptr_t sa_restorer;
380 struct compat_keyctl_kdf_params {
381 compat_uptr_t hashname;
382 compat_uptr_t otherinfo;
387 struct compat_statfs;
388 struct compat_statfs64;
389 struct compat_old_linux_dirent;
390 struct compat_linux_dirent;
391 struct linux_dirent64;
392 struct compat_msghdr;
393 struct compat_mmsghdr;
394 struct compat_sysinfo;
395 struct compat_sysctl_args;
396 struct compat_kexec_segment;
397 struct compat_mq_attr;
398 struct compat_msgbuf;
400 #define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
402 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
404 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
405 unsigned long bitmap_size);
406 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
407 unsigned long bitmap_size);
408 void copy_siginfo_to_external32(struct compat_siginfo *to,
409 const struct kernel_siginfo *from);
410 int copy_siginfo_from_user32(kernel_siginfo_t *to,
411 const struct compat_siginfo __user *from);
412 int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
413 const kernel_siginfo_t *from);
414 #ifndef copy_siginfo_to_user32
415 #define copy_siginfo_to_user32 __copy_siginfo_to_user32
417 int get_compat_sigevent(struct sigevent *event,
418 const struct compat_sigevent __user *u_event);
420 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
423 * Defined inline such that size can be compile time constant, which avoids
424 * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
427 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
430 /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
433 switch (_NSIG_WORDS) {
434 case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
436 case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
438 case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
440 case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
442 return copy_to_user(compat, &v, size) ? -EFAULT : 0;
444 return copy_to_user(compat, set, size) ? -EFAULT : 0;
448 #ifdef CONFIG_CPU_BIG_ENDIAN
449 #define unsafe_put_compat_sigset(compat, set, label) do { \
450 compat_sigset_t __user *__c = compat; \
451 const sigset_t *__s = set; \
453 switch (_NSIG_WORDS) { \
455 unsafe_put_user(__s->sig[3] >> 32, &__c->sig[7], label); \
456 unsafe_put_user(__s->sig[3], &__c->sig[6], label); \
459 unsafe_put_user(__s->sig[2] >> 32, &__c->sig[5], label); \
460 unsafe_put_user(__s->sig[2], &__c->sig[4], label); \
463 unsafe_put_user(__s->sig[1] >> 32, &__c->sig[3], label); \
464 unsafe_put_user(__s->sig[1], &__c->sig[2], label); \
467 unsafe_put_user(__s->sig[0] >> 32, &__c->sig[1], label); \
468 unsafe_put_user(__s->sig[0], &__c->sig[0], label); \
472 #define unsafe_get_compat_sigset(set, compat, label) do { \
473 const compat_sigset_t __user *__c = compat; \
474 compat_sigset_word hi, lo; \
475 sigset_t *__s = set; \
477 switch (_NSIG_WORDS) { \
479 unsafe_get_user(lo, &__c->sig[7], label); \
480 unsafe_get_user(hi, &__c->sig[6], label); \
481 __s->sig[3] = hi | (((long)lo) << 32); \
484 unsafe_get_user(lo, &__c->sig[5], label); \
485 unsafe_get_user(hi, &__c->sig[4], label); \
486 __s->sig[2] = hi | (((long)lo) << 32); \
489 unsafe_get_user(lo, &__c->sig[3], label); \
490 unsafe_get_user(hi, &__c->sig[2], label); \
491 __s->sig[1] = hi | (((long)lo) << 32); \
494 unsafe_get_user(lo, &__c->sig[1], label); \
495 unsafe_get_user(hi, &__c->sig[0], label); \
496 __s->sig[0] = hi | (((long)lo) << 32); \
500 #define unsafe_put_compat_sigset(compat, set, label) do { \
501 compat_sigset_t __user *__c = compat; \
502 const sigset_t *__s = set; \
504 unsafe_copy_to_user(__c, __s, sizeof(*__c), label); \
507 #define unsafe_get_compat_sigset(set, compat, label) do { \
508 const compat_sigset_t __user *__c = compat; \
509 sigset_t *__s = set; \
511 unsafe_copy_from_user(__s, __c, sizeof(*__c), label); \
515 extern int compat_ptrace_request(struct task_struct *child,
516 compat_long_t request,
517 compat_ulong_t addr, compat_ulong_t data);
519 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
520 compat_ulong_t addr, compat_ulong_t data);
522 struct epoll_event; /* fortunately, this one is fixed-layout */
524 extern void __user *compat_alloc_user_space(unsigned long len);
526 int compat_restore_altstack(const compat_stack_t __user *uss);
527 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
528 #define unsafe_compat_save_altstack(uss, sp, label) do { \
529 compat_stack_t __user *__uss = uss; \
530 struct task_struct *t = current; \
531 unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \
532 &__uss->ss_sp, label); \
533 unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \
534 unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \
538 * These syscall function prototypes are kept in the same order as
539 * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
542 * Please note that these prototypes here are only provided for information
543 * purposes, for static analysis, and for linking from the syscall table.
544 * These functions should not be called elsewhere from kernel code.
546 * As the syscall calling convention may be different from the default
547 * for architectures overriding the syscall calling convention, do not
548 * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
550 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
551 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
552 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
554 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
555 compat_long_t min_nr,
557 struct io_event __user *events,
558 struct old_timespec32 __user *timeout,
559 const struct __compat_aio_sigset __user *usig);
560 asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
561 compat_long_t min_nr,
563 struct io_event __user *events,
564 struct __kernel_timespec __user *timeout,
565 const struct __compat_aio_sigset __user *usig);
568 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
571 asmlinkage long compat_sys_epoll_pwait(int epfd,
572 struct epoll_event __user *events,
573 int maxevents, int timeout,
574 const compat_sigset_t __user *sigmask,
575 compat_size_t sigsetsize);
576 asmlinkage long compat_sys_epoll_pwait2(int epfd,
577 struct epoll_event __user *events,
579 const struct __kernel_timespec __user *timeout,
580 const compat_sigset_t __user *sigmask,
581 compat_size_t sigsetsize);
584 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
586 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
590 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
594 asmlinkage long compat_sys_statfs(const char __user *pathname,
595 struct compat_statfs __user *buf);
596 asmlinkage long compat_sys_statfs64(const char __user *pathname,
598 struct compat_statfs64 __user *buf);
599 asmlinkage long compat_sys_fstatfs(unsigned int fd,
600 struct compat_statfs __user *buf);
601 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
602 struct compat_statfs64 __user *buf);
603 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
604 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
605 /* No generic prototype for truncate64, ftruncate64, fallocate */
606 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
607 int flags, umode_t mode);
610 asmlinkage long compat_sys_getdents(unsigned int fd,
611 struct compat_linux_dirent __user *dirent,
614 /* fs/read_write.c */
615 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
616 /* No generic prototype for pread64 and pwrite64 */
617 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
618 const struct iovec __user *vec,
619 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
620 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
621 const struct iovec __user *vec,
622 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
623 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
624 asmlinkage long compat_sys_preadv64(unsigned long fd,
625 const struct iovec __user *vec,
626 unsigned long vlen, loff_t pos);
629 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
630 asmlinkage long compat_sys_pwritev64(unsigned long fd,
631 const struct iovec __user *vec,
632 unsigned long vlen, loff_t pos);
636 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
637 compat_off_t __user *offset, compat_size_t count);
638 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
639 compat_loff_t __user *offset, compat_size_t count);
642 asmlinkage long compat_sys_pselect6_time32(int n, compat_ulong_t __user *inp,
643 compat_ulong_t __user *outp,
644 compat_ulong_t __user *exp,
645 struct old_timespec32 __user *tsp,
647 asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
648 compat_ulong_t __user *outp,
649 compat_ulong_t __user *exp,
650 struct __kernel_timespec __user *tsp,
652 asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
654 struct old_timespec32 __user *tsp,
655 const compat_sigset_t __user *sigmask,
656 compat_size_t sigsetsize);
657 asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
659 struct __kernel_timespec __user *tsp,
660 const compat_sigset_t __user *sigmask,
661 compat_size_t sigsetsize);
664 asmlinkage long compat_sys_signalfd4(int ufd,
665 const compat_sigset_t __user *sigmask,
666 compat_size_t sigsetsize, int flags);
669 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
670 const char __user *filename,
671 struct compat_stat __user *statbuf,
673 asmlinkage long compat_sys_newfstat(unsigned int fd,
674 struct compat_stat __user *statbuf);
676 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
679 asmlinkage long compat_sys_waitid(int, compat_pid_t,
680 struct compat_siginfo __user *, int,
681 struct compat_rusage __user *);
687 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
690 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
691 compat_size_t __user *len_ptr);
693 /* kernel/itimer.c */
694 asmlinkage long compat_sys_getitimer(int which,
695 struct old_itimerval32 __user *it);
696 asmlinkage long compat_sys_setitimer(int which,
697 struct old_itimerval32 __user *in,
698 struct old_itimerval32 __user *out);
701 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
702 compat_ulong_t nr_segments,
703 struct compat_kexec_segment __user *,
704 compat_ulong_t flags);
706 /* kernel/posix-timers.c */
707 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
708 struct compat_sigevent __user *timer_event_spec,
709 timer_t __user *created_timer_id);
711 /* kernel/ptrace.c */
712 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
713 compat_long_t addr, compat_long_t data);
715 /* kernel/sched/core.c */
716 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
718 compat_ulong_t __user *user_mask_ptr);
719 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
721 compat_ulong_t __user *user_mask_ptr);
723 /* kernel/signal.c */
724 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
725 compat_stack_t __user *uoss_ptr);
726 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
727 compat_size_t sigsetsize);
728 #ifndef CONFIG_ODD_RT_SIGACTION
729 asmlinkage long compat_sys_rt_sigaction(int,
730 const struct compat_sigaction __user *,
731 struct compat_sigaction __user *,
734 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
735 compat_sigset_t __user *oset,
736 compat_size_t sigsetsize);
737 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
738 compat_size_t sigsetsize);
739 asmlinkage long compat_sys_rt_sigtimedwait_time32(compat_sigset_t __user *uthese,
740 struct compat_siginfo __user *uinfo,
741 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
742 asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
743 struct compat_siginfo __user *uinfo,
744 struct __kernel_timespec __user *uts, compat_size_t sigsetsize);
745 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
746 struct compat_siginfo __user *uinfo);
747 /* No generic prototype for rt_sigreturn */
750 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
751 asmlinkage long compat_sys_getrlimit(unsigned int resource,
752 struct compat_rlimit __user *rlim);
753 asmlinkage long compat_sys_setrlimit(unsigned int resource,
754 struct compat_rlimit __user *rlim);
755 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
758 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
759 struct timezone __user *tz);
760 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
761 struct timezone __user *tz);
764 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
767 asmlinkage long compat_sys_mq_open(const char __user *u_name,
768 int oflag, compat_mode_t mode,
769 struct compat_mq_attr __user *u_attr);
770 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
771 const struct compat_sigevent __user *u_notification);
772 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
773 const struct compat_mq_attr __user *u_mqstat,
774 struct compat_mq_attr __user *u_omqstat);
777 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
778 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
779 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
780 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
781 compat_ssize_t msgsz, int msgflg);
784 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
787 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
788 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
791 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
792 unsigned flags, struct sockaddr __user *addr,
793 int __user *addrlen);
794 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
796 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
799 /* mm/filemap.c: No generic prototype for readahead */
801 /* security/keys/keyctl.c */
802 asmlinkage long compat_sys_keyctl(u32 option,
803 u32 arg2, u32 arg3, u32 arg4, u32 arg5);
805 /* arch/example/kernel/sys_example.c */
806 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
807 const compat_uptr_t __user *envp);
809 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
811 /* mm/, CONFIG_MMU only */
812 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
814 compat_ulong_t __user *nmask,
815 compat_ulong_t maxnode, compat_ulong_t flags);
816 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
817 compat_ulong_t __user *nmask,
818 compat_ulong_t maxnode,
820 compat_ulong_t flags);
821 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
822 compat_ulong_t maxnode);
823 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
824 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
825 const compat_ulong_t __user *new_nodes);
826 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
828 const int __user *nodes,
832 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
833 compat_pid_t pid, int sig,
834 struct compat_siginfo __user *uinfo);
835 asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg,
836 unsigned vlen, unsigned int flags,
837 struct __kernel_timespec __user *timeout);
838 asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
839 unsigned vlen, unsigned int flags,
840 struct old_timespec32 __user *timeout);
841 asmlinkage long compat_sys_wait4(compat_pid_t pid,
842 compat_uint_t __user *stat_addr, int options,
843 struct compat_rusage __user *ru);
844 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
845 int, const char __user *);
846 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
847 struct file_handle __user *handle,
849 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
850 unsigned vlen, unsigned int flags);
851 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
852 const compat_uptr_t __user *argv,
853 const compat_uptr_t __user *envp, int flags);
854 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
855 const struct iovec __user *vec,
856 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
857 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
858 const struct iovec __user *vec,
859 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
860 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
861 asmlinkage long compat_sys_preadv64v2(unsigned long fd,
862 const struct iovec __user *vec,
863 unsigned long vlen, loff_t pos, rwf_t flags);
866 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
867 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
868 const struct iovec __user *vec,
869 unsigned long vlen, loff_t pos, rwf_t flags);
874 * Deprecated system calls which are still defined in
875 * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
878 /* __ARCH_WANT_SYSCALL_NO_AT */
879 asmlinkage long compat_sys_open(const char __user *filename, int flags,
882 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
883 asmlinkage long compat_sys_signalfd(int ufd,
884 const compat_sigset_t __user *sigmask,
885 compat_size_t sigsetsize);
887 /* __ARCH_WANT_SYSCALL_OFF_T */
888 asmlinkage long compat_sys_newstat(const char __user *filename,
889 struct compat_stat __user *statbuf);
890 asmlinkage long compat_sys_newlstat(const char __user *filename,
891 struct compat_stat __user *statbuf);
893 /* __ARCH_WANT_SYSCALL_DEPRECATED */
894 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
895 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
896 struct old_timeval32 __user *tvp);
897 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
898 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
901 /* obsolete: fs/readdir.c */
902 asmlinkage long compat_sys_old_readdir(unsigned int fd,
903 struct compat_old_linux_dirent __user *,
906 /* obsolete: fs/select.c */
907 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
910 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
912 /* obsolete: kernel/signal.c */
913 #ifdef __ARCH_WANT_SYS_SIGPENDING
914 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
917 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
918 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
919 compat_old_sigset_t __user *oset);
921 #ifdef CONFIG_COMPAT_OLD_SIGACTION
922 asmlinkage long compat_sys_sigaction(int sig,
923 const struct compat_old_sigaction __user *act,
924 struct compat_old_sigaction __user *oact);
927 /* obsolete: net/socket.c */
928 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
930 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
934 * For most but not all architectures, "am I in a compat syscall?" and
935 * "am I a compat task?" are the same question. For architectures on which
936 * they aren't the same question, arch code can override in_compat_syscall.
939 #ifndef in_compat_syscall
940 static inline bool in_compat_syscall(void) { return is_compat_task(); }
944 * ns_to_old_timeval32 - Compat version of ns_to_timeval
945 * @nsec: the nanoseconds value to be converted
947 * Returns the old_timeval32 representation of the nsec parameter.
949 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
951 struct __kernel_old_timeval tv;
952 struct old_timeval32 ctv;
954 tv = ns_to_kernel_old_timeval(nsec);
955 ctv.tv_sec = tv.tv_sec;
956 ctv.tv_usec = tv.tv_usec;
962 * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
963 * directly. Instead, use one of the functions which work equivalently, such
964 * as the kcompat_sys_xyzyyz() functions prototyped below.
967 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
968 struct compat_statfs64 __user * buf);
969 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
970 struct compat_statfs64 __user * buf);
972 #else /* !CONFIG_COMPAT */
974 #define is_compat_task() (0)
975 /* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
976 #define in_compat_syscall in_compat_syscall
977 static inline bool in_compat_syscall(void) { return false; }
979 #endif /* CONFIG_COMPAT */
982 * Some legacy ABIs like the i386 one use less than natural alignment for 64-bit
983 * types, and will need special compat treatment for that. Most architectures
984 * don't need that special handling even for compat syscalls.
986 #ifndef compat_need_64bit_alignment_fixup
987 #define compat_need_64bit_alignment_fixup() false
991 * A pointer passed in from user mode. This should not
992 * be used for syscall parameters, just declare them
993 * as pointers because the syscall entry code will have
994 * appropriately converted them already.
997 static inline void __user *compat_ptr(compat_uptr_t uptr)
999 return (void __user *)(unsigned long)uptr;
1003 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
1005 return (u32)(unsigned long)uptr;
1008 #endif /* _LINUX_COMPAT_H */