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linux-stable/include/linux/compat.h
Linus Torvalds 22230cd2c5 Merge branch 'compat.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 
Pull compat mount cleanups from Al Viro:
 "The last remnants of mount(2) compat buried by Christoph.

  Buried into NFS, that is.

  Generally I'm less enthusiastic about "let's use in_compat_syscall()
  deep in call chain" kind of approach than Christoph seems to be, but
  in this case it's warranted - that had been an NFS-specific wart,
  hopefully not to be repeated in any other filesystems (read: any new
  filesystem introducing non-text mount options will get NAKed even if
  it doesn't mess the layout up).

  IOW, not worth trying to grow an infrastructure that would avoid that
  use of in_compat_syscall()..."

* 'compat.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fs: remove compat_sys_mount
  fs,nfs: lift compat nfs4 mount data handling into the nfs code
  nfs: simplify nfs4_parse_monolithic
2020-10-12 16:44:57 -07:00

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/* 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/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 */
struct compat_iovec {
compat_uptr_t iov_base;
compat_size_t iov_len;
};
#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;
struct compat_sel_arg_struct;
struct rusage;
struct old_itimerval32;
struct compat_tms {
compat_clock_t tms_utime;
compat_clock_t tms_stime;
compat_clock_t tms_cutime;
compat_clock_t tms_cstime;
};
#define _COMPAT_NSIG_WORDS (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
typedef struct {
compat_sigset_word sig[_COMPAT_NSIG_WORDS];
} compat_sigset_t;
int set_compat_user_sigmask(const compat_sigset_t __user *umask,
size_t sigsetsize);
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;
struct compat_rlimit {
compat_ulong_t rlim_cur;
compat_ulong_t rlim_max;
};
struct compat_rusage {
struct old_timeval32 ru_utime;
struct old_timeval32 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;
#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);
void copy_siginfo_to_external32(struct compat_siginfo *to,
const struct kernel_siginfo *from);
int copy_siginfo_from_user32(kernel_siginfo_t *to,
const struct compat_siginfo __user *from);
int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
const kernel_siginfo_t *from);
#ifndef copy_siginfo_to_user32
#define copy_siginfo_to_user32 __copy_siginfo_to_user32
#endif
int get_compat_sigevent(struct sigevent *event,
const struct compat_sigevent __user *u_event);
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];
fallthrough;
case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
fallthrough;
case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
fallthrough;
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 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 unsafe_compat_save_altstack(uss, sp, label) do { \
compat_stack_t __user *__uss = uss; \
struct task_struct *t = current; \
unsafe_put_user(ptr_to_compat((void __user *)t->sas_ss_sp), \
&__uss->ss_sp, label); \
unsafe_put_user(t->sas_ss_flags, &__uss->ss_flags, label); \
unsafe_put_user(t->sas_ss_size, &__uss->ss_size, label); \
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_pgetevents(compat_aio_context_t ctx_id,
compat_long_t min_nr,
compat_long_t nr,
struct io_event __user *events,
struct old_timespec32 __user *timeout,
const struct __compat_aio_sigset __user *usig);
asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id,
compat_long_t min_nr,
compat_long_t nr,
struct io_event __user *events,
struct __kernel_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/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);
/* No generic prototype for pread64 and pwrite64 */
asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
const struct 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 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 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 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_time32(int n, compat_ulong_t __user *inp,
compat_ulong_t __user *outp,
compat_ulong_t __user *exp,
struct old_timespec32 __user *tsp,
void __user *sig);
asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp,
compat_ulong_t __user *outp,
compat_ulong_t __user *exp,
struct __kernel_timespec __user *tsp,
void __user *sig);
asmlinkage long compat_sys_ppoll_time32(struct pollfd __user *ufds,
unsigned int nfds,
struct old_timespec32 __user *tsp,
const compat_sigset_t __user *sigmask,
compat_size_t sigsetsize);
asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds,
unsigned int nfds,
struct __kernel_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/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 */
/* 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_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/itimer.c */
asmlinkage long compat_sys_getitimer(int which,
struct old_itimerval32 __user *it);
asmlinkage long compat_sys_setitimer(int which,
struct old_itimerval32 __user *in,
struct old_itimerval32 __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);
/* 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);
/* 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_time32(compat_sigset_t __user *uthese,
struct compat_siginfo __user *uinfo,
struct old_timespec32 __user *uts, compat_size_t sigsetsize);
asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese,
struct compat_siginfo __user *uinfo,
struct __kernel_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 old_timeval32 __user *tv,
struct timezone __user *tz);
asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
struct timezone __user *tz);
/* 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_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);
/* 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_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_time64(int fd, struct compat_mmsghdr __user *mmsg,
unsigned vlen, unsigned int flags,
struct __kernel_timespec __user *timeout);
asmlinkage long compat_sys_recvmmsg_time32(int fd, struct compat_mmsghdr __user *mmsg,
unsigned vlen, unsigned int flags,
struct old_timespec32 __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_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
unsigned vlen, unsigned int 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 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 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_preadv64v2(unsigned long fd,
const struct 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 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);
/* __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_select(int n, compat_ulong_t __user *inp,
compat_ulong_t __user *outp, compat_ulong_t __user *exp,
struct old_timeval32 __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);
/* 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: 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_old_timeval32 - Compat version of ns_to_timeval
* @nsec: the nanoseconds value to be converted
*
* Returns the old_timeval32 representation of the nsec parameter.
*/
static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
{
struct __kernel_old_timeval tv;
struct old_timeval32 ctv;
tv = ns_to_kernel_old_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)
/* Ensure no one redefines in_compat_syscall() under !CONFIG_COMPAT */
#define in_compat_syscall in_compat_syscall
static inline bool in_compat_syscall(void) { return false; }
#endif /* CONFIG_COMPAT */
/*
* Some legacy ABIs like the i386 one use less than natural alignment for 64-bit
* types, and will need special compat treatment for that. Most architectures
* don't need that special handling even for compat syscalls.
*/
#ifndef compat_need_64bit_alignment_fixup
#define compat_need_64bit_alignment_fixup() false
#endif
/*
* A pointer passed in from user mode. This should not
* be used for syscall parameters, just declare them
* as pointers because the syscall entry code will have
* appropriately converted them already.
*/
#ifndef compat_ptr
static inline void __user *compat_ptr(compat_uptr_t uptr)
{
return (void __user *)(unsigned long)uptr;
}
#endif
static inline compat_uptr_t ptr_to_compat(void __user *uptr)
{
return (u32)(unsigned long)uptr;
}
#endif /* _LINUX_COMPAT_H */
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