compat.h

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#ifndef _ASM_S390X_COMPAT_H
#define _ASM_S390X_COMPAT_H
/*
 * Architecture specific compatibility types
 */
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/thread_info.h>

#define PSW32_MASK_PER      0x40000000UL
#define PSW32_MASK_DAT      0x04000000UL
#define PSW32_MASK_IO       0x02000000UL
#define PSW32_MASK_EXT      0x01000000UL
#define PSW32_MASK_KEY      0x00F00000UL
#define PSW32_MASK_BASE     0x00080000UL    /* Always one */
#define PSW32_MASK_MCHECK   0x00040000UL
#define PSW32_MASK_WAIT     0x00020000UL
#define PSW32_MASK_PSTATE   0x00010000UL
#define PSW32_MASK_ASC      0x0000C000UL
#define PSW32_MASK_CC       0x00003000UL
#define PSW32_MASK_PM       0x00000f00UL

#define PSW32_MASK_USER     0x0000FF00UL

#define PSW32_ADDR_AMODE    0x80000000UL
#define PSW32_ADDR_INSN     0x7FFFFFFFUL

#define PSW32_DEFAULT_KEY   (((u32) PAGE_DEFAULT_ACC) << 20)

#define PSW32_ASC_PRIMARY   0x00000000UL
#define PSW32_ASC_ACCREG    0x00004000UL
#define PSW32_ASC_SECONDARY 0x00008000UL
#define PSW32_ASC_HOME      0x0000C000UL

extern u32 psw32_user_bits;

#define COMPAT_USER_HZ      100
#define COMPAT_UTS_MACHINE  "s390\0\0\0\0"

typedef u32     compat_size_t;
typedef s32     compat_ssize_t;
typedef s32     compat_time_t;
typedef s32     compat_clock_t;
typedef s32     compat_pid_t;
typedef u16     __compat_uid_t;
typedef u16     __compat_gid_t;
typedef u32     __compat_uid32_t;
typedef u32     __compat_gid32_t;
typedef u16     compat_mode_t;
typedef u32     compat_ino_t;
typedef u16     compat_dev_t;
typedef s32     compat_off_t;
typedef s64     compat_loff_t;
typedef u16     compat_nlink_t;
typedef u16     compat_ipc_pid_t;
typedef s32     compat_daddr_t;
typedef u32     compat_caddr_t;
typedef __kernel_fsid_t compat_fsid_t;
typedef s32     compat_key_t;
typedef s32     compat_timer_t;

typedef s32     compat_int_t;
typedef s32     compat_long_t;
typedef s64     compat_s64;
typedef u32     compat_uint_t;
typedef u32     compat_ulong_t;
typedef u64     compat_u64;
typedef u32     compat_uptr_t;

struct compat_timespec {
    compat_time_t   tv_sec;
    s32     tv_nsec;
};

struct compat_timeval {
    compat_time_t   tv_sec;
    s32     tv_usec;
};

struct compat_stat {
    compat_dev_t    st_dev;
    u16     __pad1;
    compat_ino_t    st_ino;
    compat_mode_t   st_mode;
    compat_nlink_t  st_nlink;
    __compat_uid_t  st_uid;
    __compat_gid_t  st_gid;
    compat_dev_t    st_rdev;
    u16     __pad2;
    u32     st_size;
    u32     st_blksize;
    u32     st_blocks;
    u32     st_atime;
    u32     st_atime_nsec;
    u32     st_mtime;
    u32     st_mtime_nsec;
    u32     st_ctime;
    u32     st_ctime_nsec;
    u32     __unused4;
    u32     __unused5;
};

struct compat_flock {
    short       l_type;
    short       l_whence;
    compat_off_t    l_start;
    compat_off_t    l_len;
    compat_pid_t    l_pid;
};

#define F_GETLK64       12
#define F_SETLK64       13
#define F_SETLKW64      14    

struct compat_flock64 {
    short       l_type;
    short       l_whence;
    compat_loff_t   l_start;
    compat_loff_t   l_len;
    compat_pid_t    l_pid;
};

struct compat_statfs {
    s32     f_type;
    s32     f_bsize;
    s32     f_blocks;
    s32     f_bfree;
    s32     f_bavail;
    s32     f_files;
    s32     f_ffree;
    compat_fsid_t   f_fsid;
    s32     f_namelen;
    s32     f_frsize;
    s32     f_flags;
    s32     f_spare[5];
};

#define COMPAT_RLIM_OLD_INFINITY    0x7fffffff
#define COMPAT_RLIM_INFINITY        0xffffffff

typedef u32     compat_old_sigset_t;    /* at least 32 bits */

#define _COMPAT_NSIG        64
#define _COMPAT_NSIG_BPW    32

typedef u32     compat_sigset_word;

typedef union compat_sigval {
    compat_int_t    sival_int;
    compat_uptr_t   sival_ptr;
} compat_sigval_t;

typedef struct compat_siginfo {
    int si_signo;
    int si_errno;
    int si_code;

    union {
        int _pad[128/sizeof(int) - 3];

        /* kill() */
        struct {
            pid_t   _pid;   /* sender's pid */
            uid_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 */
            int _sys_private;   /* not to be passed to user */
        } _timer;

        /* POSIX.1b signals */
        struct {
            pid_t           _pid;   /* sender's pid */
            uid_t           _uid;   /* sender's uid */
            compat_sigval_t     _sigval;
        } _rt;

        /* SIGCHLD */
        struct {
            pid_t           _pid;   /* which child */
            uid_t           _uid;   /* sender's uid */
            int         _status;/* exit code */
            compat_clock_t      _utime;
            compat_clock_t      _stime;
        } _sigchld;

        /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
        struct {
            __u32   _addr;  /* faulting insn/memory ref. - pointer */
        } _sigfault;

        /* SIGPOLL */
        struct {
            int _band;  /* POLL_IN, POLL_OUT, POLL_MSG */
            int _fd;
        } _sigpoll;
    } _sifields;
} compat_siginfo_t;

/*
 * How these fields are to be accessed.
 */
#define si_pid      _sifields._kill._pid
#define si_uid      _sifields._kill._uid
#define si_status   _sifields._sigchld._status
#define si_utime    _sifields._sigchld._utime
#define si_stime    _sifields._sigchld._stime
#define si_value    _sifields._rt._sigval
#define si_int      _sifields._rt._sigval.sival_int
#define si_ptr      _sifields._rt._sigval.sival_ptr
#define si_addr     _sifields._sigfault._addr
#define si_band     _sifields._sigpoll._band
#define si_fd       _sifields._sigpoll._fd
#define si_tid      _sifields._timer._tid
#define si_overrun  _sifields._timer._overrun

#define COMPAT_OFF_T_MAX    0x7fffffff
#define COMPAT_LOFF_T_MAX   0x7fffffffffffffffL

/*
 * 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.
 */

static inline void __user *compat_ptr(compat_uptr_t uptr)
{
    return (void __user *)(unsigned long)(uptr & 0x7fffffffUL);
}

static inline compat_uptr_t ptr_to_compat(void __user *uptr)
{
    return (u32)(unsigned long)uptr;
}

#ifdef CONFIG_COMPAT

static inline int is_compat_task(void)
{
    return is_32bit_task();
}

#endif

static inline void __user *arch_compat_alloc_user_space(long len)
{
    unsigned long stack;

    stack = KSTK_ESP(current);
    if (is_compat_task())
        stack &= 0x7fffffffUL;
    return (void __user *) (stack - len);
}

struct compat_ipc64_perm {
    compat_key_t key;
    __compat_uid32_t uid;
    __compat_gid32_t gid;
    __compat_uid32_t cuid;
    __compat_gid32_t cgid;
    compat_mode_t mode;
    unsigned short __pad1;
    unsigned short seq;
    unsigned short __pad2;
    unsigned int __unused1;
    unsigned int __unused2;
};

struct compat_semid64_ds {
    struct compat_ipc64_perm sem_perm;
    compat_time_t  sem_otime;
    compat_ulong_t __pad1;
    compat_time_t  sem_ctime;
    compat_ulong_t __pad2;
    compat_ulong_t sem_nsems;
    compat_ulong_t __unused1;
    compat_ulong_t __unused2;
};

struct compat_msqid64_ds {
    struct compat_ipc64_perm msg_perm;
    compat_time_t   msg_stime;
    compat_ulong_t __pad1;
    compat_time_t   msg_rtime;
    compat_ulong_t __pad2;
    compat_time_t   msg_ctime;
    compat_ulong_t __pad3;
    compat_ulong_t msg_cbytes;
    compat_ulong_t msg_qnum;
    compat_ulong_t msg_qbytes;
    compat_pid_t   msg_lspid;
    compat_pid_t   msg_lrpid;
    compat_ulong_t __unused1;
    compat_ulong_t __unused2;
};

struct compat_shmid64_ds {
    struct compat_ipc64_perm shm_perm;
    compat_size_t  shm_segsz;
    compat_time_t  shm_atime;
    compat_ulong_t __pad1;
    compat_time_t  shm_dtime;
    compat_ulong_t __pad2;
    compat_time_t  shm_ctime;
    compat_ulong_t __pad3;
    compat_pid_t   shm_cpid;
    compat_pid_t   shm_lpid;
    compat_ulong_t shm_nattch;
    compat_ulong_t __unused1;
    compat_ulong_t __unused2;
};
#endif /* _ASM_S390X_COMPAT_H */