compat.h

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

#define COMPAT_USER_HZ      100
#define COMPAT_UTS_MACHINE  "parisc\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 u32 __compat_uid_t;
typedef u32 __compat_gid_t;
typedef u32 __compat_uid32_t;
typedef u32 __compat_gid32_t;
typedef u16 compat_mode_t;
typedef u32 compat_ino_t;
typedef u32 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 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; /* dev_t is 32 bits on parisc */
    compat_ino_t        st_ino; /* 32 bits */
    compat_mode_t       st_mode;    /* 16 bits */
    compat_nlink_t      st_nlink;   /* 16 bits */
    u16         st_reserved1;   /* old st_uid */
    u16         st_reserved2;   /* old st_gid */
    compat_dev_t        st_rdev;
    compat_off_t        st_size;
    compat_time_t       st_atime;
    u32         st_atime_nsec;
    compat_time_t       st_mtime;
    u32         st_mtime_nsec;
    compat_time_t       st_ctime;
    u32         st_ctime_nsec;
    s32         st_blksize;
    s32         st_blocks;
    u32         __unused1;  /* ACL stuff */
    compat_dev_t        __unused2;  /* network */
    compat_ino_t        __unused3;  /* network */
    u32         __unused4;  /* cnodes */
    u16         __unused5;  /* netsite */
    short           st_fstype;
    compat_dev_t        st_realdev;
    u16         st_basemode;
    u16         st_spareshort;
    __compat_uid32_t    st_uid;
    __compat_gid32_t    st_gid;
    u32         st_spare4[3];
};

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

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;
    __kernel_fsid_t f_fsid;
    s32     f_namelen;
    s32     f_frsize;
    s32     f_flags;
    s32     f_spare[4];
};

struct compat_sigcontext {
    compat_int_t sc_flags;
    compat_int_t sc_gr[32]; /* PSW in sc_gr[0] */
    u64 sc_fr[32];
    compat_int_t sc_iasq[2];
    compat_int_t sc_iaoq[2];
    compat_int_t sc_sar; /* cr11 */
};

#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 {
            unsigned int _pid;      /* sender's pid */
            unsigned int _uid;      /* sender's uid */
        } _kill;

        /* POSIX.1b timers */
        struct {
            compat_timer_t _tid;            /* timer id */
            int _overrun;           /* overrun count */
            char _pad[sizeof(unsigned int) - sizeof(int)];
            compat_sigval_t _sigval;        /* same as below */
            int _sys_private;       /* not to be passed to user */
        } _timer;

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

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

        /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
        struct {
            unsigned int _addr;     /* faulting insn/memory ref. */
        } _sigfault;

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

#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;
}

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

static __inline__ void __user *arch_compat_alloc_user_space(long len)
{
    struct pt_regs *regs = &current->thread.regs;
    return (void __user *)regs->gr[30];
}

static inline int __is_compat_task(struct task_struct *t)
{
    return test_ti_thread_flag(task_thread_info(t), TIF_32BIT);
}

static inline int is_compat_task(void)
{
    return __is_compat_task(current);
}

#endif /* _ASM_PARISC_COMPAT_H */