v4.19.13 snapshot.
diff --git a/include/linux/compat.h b/include/linux/compat.h
new file mode 100644
index 0000000..de0c13b
--- /dev/null
+++ b/include/linux/compat.h
@@ -0,0 +1,1045 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_COMPAT_H
+#define _LINUX_COMPAT_H
+/*
+ * These are the type definitions for the architecture specific
+ * syscall compatibility layer.
+ */
+
+#include <linux/types.h>
+#include <linux/compat_time.h>
+
+#include <linux/stat.h>
+#include <linux/param.h> /* for HZ */
+#include <linux/sem.h>
+#include <linux/socket.h>
+#include <linux/if.h>
+#include <linux/fs.h>
+#include <linux/aio_abi.h> /* for aio_context_t */
+#include <linux/uaccess.h>
+#include <linux/unistd.h>
+
+#include <asm/compat.h>
+
+#ifdef CONFIG_COMPAT
+#include <asm/siginfo.h>
+#include <asm/signal.h>
+#endif
+
+#ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
+/*
+ * It may be useful for an architecture to override the definitions of the
+ * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular
+ * to use a different calling convention for syscalls. To allow for that,
+ + the prototypes for the compat_sys_*() functions below will *not* be included
+ * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
+ */
+#include <asm/syscall_wrapper.h>
+#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
+
+#ifndef COMPAT_USE_64BIT_TIME
+#define COMPAT_USE_64BIT_TIME 0
+#endif
+
+#ifndef __SC_DELOUSE
+#define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
+#endif
+
+#ifndef COMPAT_SYSCALL_DEFINE0
+#define COMPAT_SYSCALL_DEFINE0(name) \
+ asmlinkage long compat_sys_##name(void); \
+ ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \
+ asmlinkage long compat_sys_##name(void)
+#endif /* COMPAT_SYSCALL_DEFINE0 */
+
+#define COMPAT_SYSCALL_DEFINE1(name, ...) \
+ COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_DEFINE2(name, ...) \
+ COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_DEFINE3(name, ...) \
+ COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_DEFINE4(name, ...) \
+ COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_DEFINE5(name, ...) \
+ COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_DEFINE6(name, ...) \
+ COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
+
+/*
+ * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which
+ * sign-extends 32-bit ints to longs whenever needed. The actual work is
+ * done within __do_compat_sys_*().
+ */
+#ifndef COMPAT_SYSCALL_DEFINEx
+#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
+ __diag_push(); \
+ __diag_ignore(GCC, 8, "-Wattribute-alias", \
+ "Type aliasing is used to sanitize syscall arguments");\
+ asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
+ asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
+ __attribute__((alias(__stringify(__se_compat_sys##name)))); \
+ ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO); \
+ static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
+ asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
+ asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
+ { \
+ long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
+ __MAP(x,__SC_TEST,__VA_ARGS__); \
+ return ret; \
+ } \
+ __diag_pop(); \
+ static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
+#endif /* COMPAT_SYSCALL_DEFINEx */
+
+#ifdef CONFIG_COMPAT
+
+#ifndef compat_user_stack_pointer
+#define compat_user_stack_pointer() current_user_stack_pointer()
+#endif
+#ifndef compat_sigaltstack /* we'll need that for MIPS */
+typedef struct compat_sigaltstack {
+ compat_uptr_t ss_sp;
+ int ss_flags;
+ compat_size_t ss_size;
+} compat_stack_t;
+#endif
+#ifndef COMPAT_MINSIGSTKSZ
+#define COMPAT_MINSIGSTKSZ MINSIGSTKSZ
+#endif
+
+#define compat_jiffies_to_clock_t(x) \
+ (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
+
+typedef __compat_uid32_t compat_uid_t;
+typedef __compat_gid32_t compat_gid_t;
+
+typedef compat_ulong_t compat_aio_context_t;
+
+struct compat_sel_arg_struct;
+struct rusage;
+
+struct compat_utimbuf {
+ compat_time_t actime;
+ compat_time_t modtime;
+};
+
+struct compat_itimerval {
+ struct compat_timeval it_interval;
+ struct compat_timeval it_value;
+};
+
+struct itimerval;
+int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
+int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
+
+struct compat_tms {
+ compat_clock_t tms_utime;
+ compat_clock_t tms_stime;
+ compat_clock_t tms_cutime;
+ compat_clock_t tms_cstime;
+};
+
+struct compat_timex {
+ compat_uint_t modes;
+ compat_long_t offset;
+ compat_long_t freq;
+ compat_long_t maxerror;
+ compat_long_t esterror;
+ compat_int_t status;
+ compat_long_t constant;
+ compat_long_t precision;
+ compat_long_t tolerance;
+ struct compat_timeval time;
+ compat_long_t tick;
+ compat_long_t ppsfreq;
+ compat_long_t jitter;
+ compat_int_t shift;
+ compat_long_t stabil;
+ compat_long_t jitcnt;
+ compat_long_t calcnt;
+ compat_long_t errcnt;
+ compat_long_t stbcnt;
+ compat_int_t tai;
+
+ compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
+ compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
+ compat_int_t:32; compat_int_t:32; compat_int_t:32;
+};
+
+struct timex;
+int compat_get_timex(struct timex *, const struct compat_timex __user *);
+int compat_put_timex(struct compat_timex __user *, const struct timex *);
+
+#define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
+
+typedef struct {
+ compat_sigset_word sig[_COMPAT_NSIG_WORDS];
+} compat_sigset_t;
+
+struct compat_sigaction {
+#ifndef __ARCH_HAS_IRIX_SIGACTION
+ compat_uptr_t sa_handler;
+ compat_ulong_t sa_flags;
+#else
+ compat_uint_t sa_flags;
+ compat_uptr_t sa_handler;
+#endif
+#ifdef __ARCH_HAS_SA_RESTORER
+ compat_uptr_t sa_restorer;
+#endif
+ compat_sigset_t sa_mask __packed;
+};
+
+typedef union compat_sigval {
+ compat_int_t sival_int;
+ compat_uptr_t sival_ptr;
+} compat_sigval_t;
+
+typedef struct compat_siginfo {
+ int si_signo;
+#ifndef __ARCH_HAS_SWAPPED_SIGINFO
+ int si_errno;
+ int si_code;
+#else
+ int si_code;
+ int si_errno;
+#endif
+
+ union {
+ int _pad[128/sizeof(int) - 3];
+
+ /* kill() */
+ struct {
+ compat_pid_t _pid; /* sender's pid */
+ __compat_uid32_t _uid; /* sender's uid */
+ } _kill;
+
+ /* POSIX.1b timers */
+ struct {
+ compat_timer_t _tid; /* timer id */
+ int _overrun; /* overrun count */
+ compat_sigval_t _sigval; /* same as below */
+ } _timer;
+
+ /* POSIX.1b signals */
+ struct {
+ compat_pid_t _pid; /* sender's pid */
+ __compat_uid32_t _uid; /* sender's uid */
+ compat_sigval_t _sigval;
+ } _rt;
+
+ /* SIGCHLD */
+ struct {
+ compat_pid_t _pid; /* which child */
+ __compat_uid32_t _uid; /* sender's uid */
+ int _status; /* exit code */
+ compat_clock_t _utime;
+ compat_clock_t _stime;
+ } _sigchld;
+
+#ifdef CONFIG_X86_X32_ABI
+ /* SIGCHLD (x32 version) */
+ struct {
+ compat_pid_t _pid; /* which child */
+ __compat_uid32_t _uid; /* sender's uid */
+ int _status; /* exit code */
+ compat_s64 _utime;
+ compat_s64 _stime;
+ } _sigchld_x32;
+#endif
+
+ /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
+ struct {
+ compat_uptr_t _addr; /* faulting insn/memory ref. */
+#ifdef __ARCH_SI_TRAPNO
+ int _trapno; /* TRAP # which caused the signal */
+#endif
+#define __COMPAT_ADDR_BND_PKEY_PAD (__alignof__(compat_uptr_t) < sizeof(short) ? \
+ sizeof(short) : __alignof__(compat_uptr_t))
+ union {
+ /*
+ * used when si_code=BUS_MCEERR_AR or
+ * used when si_code=BUS_MCEERR_AO
+ */
+ short int _addr_lsb; /* Valid LSB of the reported address. */
+ /* used when si_code=SEGV_BNDERR */
+ struct {
+ char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
+ compat_uptr_t _lower;
+ compat_uptr_t _upper;
+ } _addr_bnd;
+ /* used when si_code=SEGV_PKUERR */
+ struct {
+ char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
+ u32 _pkey;
+ } _addr_pkey;
+ };
+ } _sigfault;
+
+ /* SIGPOLL */
+ struct {
+ compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
+ int _fd;
+ } _sigpoll;
+
+ struct {
+ compat_uptr_t _call_addr; /* calling user insn */
+ int _syscall; /* triggering system call number */
+ unsigned int _arch; /* AUDIT_ARCH_* of syscall */
+ } _sigsys;
+ } _sifields;
+} compat_siginfo_t;
+
+/*
+ * These functions operate on 32- or 64-bit specs depending on
+ * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
+ */
+extern int compat_get_timespec(struct timespec *, const void __user *);
+extern int compat_put_timespec(const struct timespec *, void __user *);
+extern int compat_get_timeval(struct timeval *, const void __user *);
+extern int compat_put_timeval(const struct timeval *, void __user *);
+
+struct compat_iovec {
+ compat_uptr_t iov_base;
+ compat_size_t iov_len;
+};
+
+struct compat_rlimit {
+ compat_ulong_t rlim_cur;
+ compat_ulong_t rlim_max;
+};
+
+struct compat_rusage {
+ struct compat_timeval ru_utime;
+ struct compat_timeval ru_stime;
+ compat_long_t ru_maxrss;
+ compat_long_t ru_ixrss;
+ compat_long_t ru_idrss;
+ compat_long_t ru_isrss;
+ compat_long_t ru_minflt;
+ compat_long_t ru_majflt;
+ compat_long_t ru_nswap;
+ compat_long_t ru_inblock;
+ compat_long_t ru_oublock;
+ compat_long_t ru_msgsnd;
+ compat_long_t ru_msgrcv;
+ compat_long_t ru_nsignals;
+ compat_long_t ru_nvcsw;
+ compat_long_t ru_nivcsw;
+};
+
+extern int put_compat_rusage(const struct rusage *,
+ struct compat_rusage __user *);
+
+struct compat_siginfo;
+struct __compat_aio_sigset;
+
+struct compat_dirent {
+ u32 d_ino;
+ compat_off_t d_off;
+ u16 d_reclen;
+ char d_name[256];
+};
+
+struct compat_ustat {
+ compat_daddr_t f_tfree;
+ compat_ino_t f_tinode;
+ char f_fname[6];
+ char f_fpack[6];
+};
+
+#define COMPAT_SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
+
+typedef struct compat_sigevent {
+ compat_sigval_t sigev_value;
+ compat_int_t sigev_signo;
+ compat_int_t sigev_notify;
+ union {
+ compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
+ compat_int_t _tid;
+
+ struct {
+ compat_uptr_t _function;
+ compat_uptr_t _attribute;
+ } _sigev_thread;
+ } _sigev_un;
+} compat_sigevent_t;
+
+struct compat_ifmap {
+ compat_ulong_t mem_start;
+ compat_ulong_t mem_end;
+ unsigned short base_addr;
+ unsigned char irq;
+ unsigned char dma;
+ unsigned char port;
+};
+
+struct compat_if_settings {
+ unsigned int type; /* Type of physical device or protocol */
+ unsigned int size; /* Size of the data allocated by the caller */
+ compat_uptr_t ifs_ifsu; /* union of pointers */
+};
+
+struct compat_ifreq {
+ union {
+ char ifrn_name[IFNAMSIZ]; /* if name, e.g. "en0" */
+ } ifr_ifrn;
+ union {
+ struct sockaddr ifru_addr;
+ struct sockaddr ifru_dstaddr;
+ struct sockaddr ifru_broadaddr;
+ struct sockaddr ifru_netmask;
+ struct sockaddr ifru_hwaddr;
+ short ifru_flags;
+ compat_int_t ifru_ivalue;
+ compat_int_t ifru_mtu;
+ struct compat_ifmap ifru_map;
+ char ifru_slave[IFNAMSIZ]; /* Just fits the size */
+ char ifru_newname[IFNAMSIZ];
+ compat_caddr_t ifru_data;
+ struct compat_if_settings ifru_settings;
+ } ifr_ifru;
+};
+
+struct compat_ifconf {
+ compat_int_t ifc_len; /* size of buffer */
+ compat_caddr_t ifcbuf;
+};
+
+struct compat_robust_list {
+ compat_uptr_t next;
+};
+
+struct compat_robust_list_head {
+ struct compat_robust_list list;
+ compat_long_t futex_offset;
+ compat_uptr_t list_op_pending;
+};
+
+#ifdef CONFIG_COMPAT_OLD_SIGACTION
+struct compat_old_sigaction {
+ compat_uptr_t sa_handler;
+ compat_old_sigset_t sa_mask;
+ compat_ulong_t sa_flags;
+ compat_uptr_t sa_restorer;
+};
+#endif
+
+struct compat_keyctl_kdf_params {
+ compat_uptr_t hashname;
+ compat_uptr_t otherinfo;
+ __u32 otherinfolen;
+ __u32 __spare[8];
+};
+
+struct compat_statfs;
+struct compat_statfs64;
+struct compat_old_linux_dirent;
+struct compat_linux_dirent;
+struct linux_dirent64;
+struct compat_msghdr;
+struct compat_mmsghdr;
+struct compat_sysinfo;
+struct compat_sysctl_args;
+struct compat_kexec_segment;
+struct compat_mq_attr;
+struct compat_msgbuf;
+
+extern void compat_exit_robust_list(struct task_struct *curr);
+
+#define BITS_PER_COMPAT_LONG (8*sizeof(compat_long_t))
+
+#define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
+
+long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
+ unsigned long bitmap_size);
+long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
+ unsigned long bitmap_size);
+int copy_siginfo_from_user32(siginfo_t *to, const struct compat_siginfo __user *from);
+int copy_siginfo_to_user32(struct compat_siginfo __user *to, const siginfo_t *from);
+int get_compat_sigevent(struct sigevent *event,
+ const struct compat_sigevent __user *u_event);
+
+static inline int compat_timeval_compare(struct compat_timeval *lhs,
+ struct compat_timeval *rhs)
+{
+ if (lhs->tv_sec < rhs->tv_sec)
+ return -1;
+ if (lhs->tv_sec > rhs->tv_sec)
+ return 1;
+ return lhs->tv_usec - rhs->tv_usec;
+}
+
+static inline int compat_timespec_compare(struct compat_timespec *lhs,
+ struct compat_timespec *rhs)
+{
+ if (lhs->tv_sec < rhs->tv_sec)
+ return -1;
+ if (lhs->tv_sec > rhs->tv_sec)
+ return 1;
+ return lhs->tv_nsec - rhs->tv_nsec;
+}
+
+extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
+
+/*
+ * Defined inline such that size can be compile time constant, which avoids
+ * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
+ */
+static inline int
+put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
+ unsigned int size)
+{
+ /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
+#ifdef __BIG_ENDIAN
+ compat_sigset_t v;
+ switch (_NSIG_WORDS) {
+ case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
+ case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
+ case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
+ case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
+ }
+ return copy_to_user(compat, &v, size) ? -EFAULT : 0;
+#else
+ return copy_to_user(compat, set, size) ? -EFAULT : 0;
+#endif
+}
+
+extern int compat_ptrace_request(struct task_struct *child,
+ compat_long_t request,
+ compat_ulong_t addr, compat_ulong_t data);
+
+extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
+ compat_ulong_t addr, compat_ulong_t data);
+
+struct epoll_event; /* fortunately, this one is fixed-layout */
+
+extern ssize_t compat_rw_copy_check_uvector(int type,
+ const struct compat_iovec __user *uvector,
+ unsigned long nr_segs,
+ unsigned long fast_segs, struct iovec *fast_pointer,
+ struct iovec **ret_pointer);
+
+extern void __user *compat_alloc_user_space(unsigned long len);
+
+int compat_restore_altstack(const compat_stack_t __user *uss);
+int __compat_save_altstack(compat_stack_t __user *, unsigned long);
+#define compat_save_altstack_ex(uss, sp) do { \
+ compat_stack_t __user *__uss = uss; \
+ struct task_struct *t = current; \
+ put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
+ put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
+ put_user_ex(t->sas_ss_size, &__uss->ss_size); \
+ if (t->sas_ss_flags & SS_AUTODISARM) \
+ sas_ss_reset(t); \
+} while (0);
+
+/*
+ * These syscall function prototypes are kept in the same order as
+ * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
+ * go below.
+ *
+ * Please note that these prototypes here are only provided for information
+ * purposes, for static analysis, and for linking from the syscall table.
+ * These functions should not be called elsewhere from kernel code.
+ *
+ * As the syscall calling convention may be different from the default
+ * for architectures overriding the syscall calling convention, do not
+ * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
+ */
+#ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
+asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
+asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
+ u32 __user *iocb);
+asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
+ compat_long_t min_nr,
+ compat_long_t nr,
+ struct io_event __user *events,
+ struct compat_timespec __user *timeout);
+asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
+ compat_long_t min_nr,
+ compat_long_t nr,
+ struct io_event __user *events,
+ struct compat_timespec __user *timeout,
+ const struct __compat_aio_sigset __user *usig);
+
+/* fs/cookies.c */
+asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
+
+/* fs/eventpoll.c */
+asmlinkage long compat_sys_epoll_pwait(int epfd,
+ struct epoll_event __user *events,
+ int maxevents, int timeout,
+ const compat_sigset_t __user *sigmask,
+ compat_size_t sigsetsize);
+
+/* fs/fcntl.c */
+asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
+ compat_ulong_t arg);
+asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
+ compat_ulong_t arg);
+
+/* fs/ioctl.c */
+asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
+ compat_ulong_t arg);
+
+/* fs/namespace.c */
+asmlinkage long compat_sys_mount(const char __user *dev_name,
+ const char __user *dir_name,
+ const char __user *type, compat_ulong_t flags,
+ const void __user *data);
+
+/* fs/open.c */
+asmlinkage long compat_sys_statfs(const char __user *pathname,
+ struct compat_statfs __user *buf);
+asmlinkage long compat_sys_statfs64(const char __user *pathname,
+ compat_size_t sz,
+ struct compat_statfs64 __user *buf);
+asmlinkage long compat_sys_fstatfs(unsigned int fd,
+ struct compat_statfs __user *buf);
+asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
+ struct compat_statfs64 __user *buf);
+asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
+asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
+/* No generic prototype for truncate64, ftruncate64, fallocate */
+asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
+ int flags, umode_t mode);
+
+/* fs/readdir.c */
+asmlinkage long compat_sys_getdents(unsigned int fd,
+ struct compat_linux_dirent __user *dirent,
+ unsigned int count);
+
+/* fs/read_write.c */
+asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
+asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
+ const struct compat_iovec __user *vec, compat_ulong_t vlen);
+asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
+ const struct compat_iovec __user *vec, compat_ulong_t vlen);
+/* No generic prototype for pread64 and pwrite64 */
+asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
+ const struct compat_iovec __user *vec,
+ compat_ulong_t vlen, u32 pos_low, u32 pos_high);
+asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
+ const struct compat_iovec __user *vec,
+ compat_ulong_t vlen, u32 pos_low, u32 pos_high);
+#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
+asmlinkage long compat_sys_preadv64(unsigned long fd,
+ const struct compat_iovec __user *vec,
+ unsigned long vlen, loff_t pos);
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
+asmlinkage long compat_sys_pwritev64(unsigned long fd,
+ const struct compat_iovec __user *vec,
+ unsigned long vlen, loff_t pos);
+#endif
+
+/* fs/sendfile.c */
+asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
+ compat_off_t __user *offset, compat_size_t count);
+asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
+ compat_loff_t __user *offset, compat_size_t count);
+
+/* fs/select.c */
+asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
+ compat_ulong_t __user *outp,
+ compat_ulong_t __user *exp,
+ struct compat_timespec __user *tsp,
+ void __user *sig);
+asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
+ unsigned int nfds,
+ struct compat_timespec __user *tsp,
+ const compat_sigset_t __user *sigmask,
+ compat_size_t sigsetsize);
+
+/* fs/signalfd.c */
+asmlinkage long compat_sys_signalfd4(int ufd,
+ const compat_sigset_t __user *sigmask,
+ compat_size_t sigsetsize, int flags);
+
+/* fs/splice.c */
+asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
+ unsigned int nr_segs, unsigned int flags);
+
+/* fs/stat.c */
+asmlinkage long compat_sys_newfstatat(unsigned int dfd,
+ const char __user *filename,
+ struct compat_stat __user *statbuf,
+ int flag);
+asmlinkage long compat_sys_newfstat(unsigned int fd,
+ struct compat_stat __user *statbuf);
+
+/* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
+
+/* fs/timerfd.c */
+asmlinkage long compat_sys_timerfd_gettime(int ufd,
+ struct compat_itimerspec __user *otmr);
+asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
+ const struct compat_itimerspec __user *utmr,
+ struct compat_itimerspec __user *otmr);
+
+/* fs/utimes.c */
+asmlinkage long compat_sys_utimensat(unsigned int dfd,
+ const char __user *filename,
+ struct compat_timespec __user *t,
+ int flags);
+
+/* kernel/exit.c */
+asmlinkage long compat_sys_waitid(int, compat_pid_t,
+ struct compat_siginfo __user *, int,
+ struct compat_rusage __user *);
+
+
+
+/* kernel/futex.c */
+asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
+ struct compat_timespec __user *utime, u32 __user *uaddr2,
+ u32 val3);
+asmlinkage long
+compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
+ compat_size_t len);
+asmlinkage long
+compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
+ compat_size_t __user *len_ptr);
+
+/* kernel/hrtimer.c */
+asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
+ struct compat_timespec __user *rmtp);
+
+/* kernel/itimer.c */
+asmlinkage long compat_sys_getitimer(int which,
+ struct compat_itimerval __user *it);
+asmlinkage long compat_sys_setitimer(int which,
+ struct compat_itimerval __user *in,
+ struct compat_itimerval __user *out);
+
+/* kernel/kexec.c */
+asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
+ compat_ulong_t nr_segments,
+ struct compat_kexec_segment __user *,
+ compat_ulong_t flags);
+
+/* kernel/posix-timers.c */
+asmlinkage long compat_sys_timer_create(clockid_t which_clock,
+ struct compat_sigevent __user *timer_event_spec,
+ timer_t __user *created_timer_id);
+asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
+ struct compat_itimerspec __user *setting);
+asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
+ struct compat_itimerspec __user *new,
+ struct compat_itimerspec __user *old);
+asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
+ struct compat_timespec __user *tp);
+asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
+ struct compat_timespec __user *tp);
+asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
+ struct compat_timespec __user *tp);
+asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
+ struct compat_timespec __user *rqtp,
+ struct compat_timespec __user *rmtp);
+
+/* kernel/ptrace.c */
+asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
+ compat_long_t addr, compat_long_t data);
+
+/* kernel/sched/core.c */
+asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
+ unsigned int len,
+ compat_ulong_t __user *user_mask_ptr);
+asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
+ unsigned int len,
+ compat_ulong_t __user *user_mask_ptr);
+asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
+ struct compat_timespec __user *interval);
+
+/* kernel/signal.c */
+asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
+ compat_stack_t __user *uoss_ptr);
+asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
+ compat_size_t sigsetsize);
+#ifndef CONFIG_ODD_RT_SIGACTION
+asmlinkage long compat_sys_rt_sigaction(int,
+ const struct compat_sigaction __user *,
+ struct compat_sigaction __user *,
+ compat_size_t);
+#endif
+asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
+ compat_sigset_t __user *oset,
+ compat_size_t sigsetsize);
+asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
+ compat_size_t sigsetsize);
+asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
+ struct compat_siginfo __user *uinfo,
+ struct compat_timespec __user *uts, compat_size_t sigsetsize);
+asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
+ struct compat_siginfo __user *uinfo);
+/* No generic prototype for rt_sigreturn */
+
+/* kernel/sys.c */
+asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
+asmlinkage long compat_sys_getrlimit(unsigned int resource,
+ struct compat_rlimit __user *rlim);
+asmlinkage long compat_sys_setrlimit(unsigned int resource,
+ struct compat_rlimit __user *rlim);
+asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
+
+/* kernel/time.c */
+asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
+ struct timezone __user *tz);
+asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
+ struct timezone __user *tz);
+asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
+
+/* kernel/timer.c */
+asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
+
+/* ipc/mqueue.c */
+asmlinkage long compat_sys_mq_open(const char __user *u_name,
+ int oflag, compat_mode_t mode,
+ struct compat_mq_attr __user *u_attr);
+asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
+ const char __user *u_msg_ptr,
+ compat_size_t msg_len, unsigned int msg_prio,
+ const struct compat_timespec __user *u_abs_timeout);
+asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
+ char __user *u_msg_ptr,
+ compat_size_t msg_len, unsigned int __user *u_msg_prio,
+ const struct compat_timespec __user *u_abs_timeout);
+asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
+ const struct compat_sigevent __user *u_notification);
+asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
+ const struct compat_mq_attr __user *u_mqstat,
+ struct compat_mq_attr __user *u_omqstat);
+
+/* ipc/msg.c */
+asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
+asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
+ compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
+asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
+ compat_ssize_t msgsz, int msgflg);
+
+/* ipc/sem.c */
+asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
+asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
+ unsigned nsems, const struct compat_timespec __user *timeout);
+
+/* ipc/shm.c */
+asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
+asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
+
+/* net/socket.c */
+asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
+ unsigned flags, struct sockaddr __user *addr,
+ int __user *addrlen);
+asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
+ char __user *optval, unsigned int optlen);
+asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
+ char __user *optval, int __user *optlen);
+asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
+ unsigned flags);
+asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
+ unsigned int flags);
+
+/* mm/filemap.c: No generic prototype for readahead */
+
+/* security/keys/keyctl.c */
+asmlinkage long compat_sys_keyctl(u32 option,
+ u32 arg2, u32 arg3, u32 arg4, u32 arg5);
+
+/* arch/example/kernel/sys_example.c */
+asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
+ const compat_uptr_t __user *envp);
+
+/* mm/fadvise.c: No generic prototype for fadvise64_64 */
+
+/* mm/, CONFIG_MMU only */
+asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
+ compat_ulong_t mode,
+ compat_ulong_t __user *nmask,
+ compat_ulong_t maxnode, compat_ulong_t flags);
+asmlinkage long compat_sys_get_mempolicy(int __user *policy,
+ compat_ulong_t __user *nmask,
+ compat_ulong_t maxnode,
+ compat_ulong_t addr,
+ compat_ulong_t flags);
+asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
+ compat_ulong_t maxnode);
+asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
+ compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
+ const compat_ulong_t __user *new_nodes);
+asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
+ __u32 __user *pages,
+ const int __user *nodes,
+ int __user *status,
+ int flags);
+
+asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
+ compat_pid_t pid, int sig,
+ struct compat_siginfo __user *uinfo);
+asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
+ unsigned vlen, unsigned int flags,
+ struct compat_timespec __user *timeout);
+asmlinkage long compat_sys_wait4(compat_pid_t pid,
+ compat_uint_t __user *stat_addr, int options,
+ struct compat_rusage __user *ru);
+asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
+ int, const char __user *);
+asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
+ struct file_handle __user *handle,
+ int flags);
+asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
+ struct compat_timex __user *tp);
+asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
+ unsigned vlen, unsigned int flags);
+asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
+ const struct compat_iovec __user *lvec,
+ compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
+ compat_ulong_t riovcnt, compat_ulong_t flags);
+asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
+ const struct compat_iovec __user *lvec,
+ compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
+ compat_ulong_t riovcnt, compat_ulong_t flags);
+asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
+ const compat_uptr_t __user *argv,
+ const compat_uptr_t __user *envp, int flags);
+asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
+ const struct compat_iovec __user *vec,
+ compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
+asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
+ const struct compat_iovec __user *vec,
+ compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
+#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
+asmlinkage long compat_sys_readv64v2(unsigned long fd,
+ const struct compat_iovec __user *vec,
+ unsigned long vlen, loff_t pos, rwf_t flags);
+#endif
+
+#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
+asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
+ const struct compat_iovec __user *vec,
+ unsigned long vlen, loff_t pos, rwf_t flags);
+#endif
+
+
+/*
+ * Deprecated system calls which are still defined in
+ * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
+ */
+
+/* __ARCH_WANT_SYSCALL_NO_AT */
+asmlinkage long compat_sys_open(const char __user *filename, int flags,
+ umode_t mode);
+asmlinkage long compat_sys_utimes(const char __user *filename,
+ struct compat_timeval __user *t);
+
+/* __ARCH_WANT_SYSCALL_NO_FLAGS */
+asmlinkage long compat_sys_signalfd(int ufd,
+ const compat_sigset_t __user *sigmask,
+ compat_size_t sigsetsize);
+
+/* __ARCH_WANT_SYSCALL_OFF_T */
+asmlinkage long compat_sys_newstat(const char __user *filename,
+ struct compat_stat __user *statbuf);
+asmlinkage long compat_sys_newlstat(const char __user *filename,
+ struct compat_stat __user *statbuf);
+
+/* __ARCH_WANT_SYSCALL_DEPRECATED */
+asmlinkage long compat_sys_time(compat_time_t __user *tloc);
+asmlinkage long compat_sys_utime(const char __user *filename,
+ struct compat_utimbuf __user *t);
+asmlinkage long compat_sys_futimesat(unsigned int dfd,
+ const char __user *filename,
+ struct compat_timeval __user *t);
+asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
+ compat_ulong_t __user *outp, compat_ulong_t __user *exp,
+ struct compat_timeval __user *tvp);
+asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
+asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
+ unsigned flags);
+asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
+
+/* obsolete: fs/readdir.c */
+asmlinkage long compat_sys_old_readdir(unsigned int fd,
+ struct compat_old_linux_dirent __user *,
+ unsigned int count);
+
+/* obsolete: fs/select.c */
+asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
+
+/* obsolete: ipc */
+asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
+
+/* obsolete: kernel/signal.c */
+#ifdef __ARCH_WANT_SYS_SIGPENDING
+asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
+#endif
+
+#ifdef __ARCH_WANT_SYS_SIGPROCMASK
+asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
+ compat_old_sigset_t __user *oset);
+#endif
+#ifdef CONFIG_COMPAT_OLD_SIGACTION
+asmlinkage long compat_sys_sigaction(int sig,
+ const struct compat_old_sigaction __user *act,
+ struct compat_old_sigaction __user *oact);
+#endif
+
+/* obsolete: kernel/time/time.c */
+asmlinkage long compat_sys_stime(compat_time_t __user *tptr);
+
+/* obsolete: net/socket.c */
+asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
+
+#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
+
+
+/*
+ * For most but not all architectures, "am I in a compat syscall?" and
+ * "am I a compat task?" are the same question. For architectures on which
+ * they aren't the same question, arch code can override in_compat_syscall.
+ */
+
+#ifndef in_compat_syscall
+static inline bool in_compat_syscall(void) { return is_compat_task(); }
+#endif
+
+/**
+ * ns_to_compat_timeval - Compat version of ns_to_timeval
+ * @nsec: the nanoseconds value to be converted
+ *
+ * Returns the compat_timeval representation of the nsec parameter.
+ */
+static inline struct compat_timeval ns_to_compat_timeval(s64 nsec)
+{
+ struct timeval tv;
+ struct compat_timeval ctv;
+
+ tv = ns_to_timeval(nsec);
+ ctv.tv_sec = tv.tv_sec;
+ ctv.tv_usec = tv.tv_usec;
+
+ return ctv;
+}
+
+/*
+ * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
+ * directly. Instead, use one of the functions which work equivalently, such
+ * as the kcompat_sys_xyzyyz() functions prototyped below.
+ */
+
+int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
+ struct compat_statfs64 __user * buf);
+int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
+ struct compat_statfs64 __user * buf);
+
+#else /* !CONFIG_COMPAT */
+
+#define is_compat_task() (0)
+#ifndef in_compat_syscall
+static inline bool in_compat_syscall(void) { return false; }
+#endif
+
+#endif /* CONFIG_COMPAT */
+
+#endif /* _LINUX_COMPAT_H */