root/include/asm-parisc/compat.h

INCLUDED FROM

DEFINITIONS

1. compat_ptr
2. ptr_to_compat
3. compat_alloc_user_space
4. __is_compat_task
5. is_compat_task

#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

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;

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_spare[5];
};

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;

#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.
 */
typedef u32             compat_uptr_t;

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 *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 */