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compat_linux.h

#ifndef _ASM_S390X_S390_H
#define _ASM_S390X_S390_H

#include <linux/compat.h>
#include <linux/socket.h>
#include <linux/syscalls.h>
#include <linux/nfs_fs.h>
#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/export.h>

/* Macro that masks the high order bit of an 32 bit pointer and converts it*/
/*       to a 64 bit pointer */
#define A(__x) ((unsigned long)((__x) & 0x7FFFFFFFUL))
#define AA(__x)                     \
      ((unsigned long)(__x))

/* Now 32bit compatibility types */
struct ipc_kludge_32 {
        __u32   msgp;                           /* pointer              */
        __s32   msgtyp;
};

struct old_sigaction32 {
       __u32                  sa_handler; /* Really a pointer, but need to deal with 32 bits */
       compat_old_sigset_t    sa_mask;    /* A 32 bit mask */
       __u32                  sa_flags;
       __u32                  sa_restorer;      /* Another 32 bit pointer */
};
 
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

/* asm/sigcontext.h */
typedef union
{
      __u64   d;
      __u32   f; 
} freg_t32;

typedef struct
{
      unsigned int      fpc;
      freg_t32    fprs[__NUM_FPRS];              
} _s390_fp_regs32;

typedef struct 
{
        __u32   mask;
        __u32     addr;
} _psw_t32 __attribute__ ((aligned(8)));

typedef struct
{
      _psw_t32    psw;
      __u32       gprs[__NUM_GPRS];
      __u32       acrs[__NUM_ACRS];
} _s390_regs_common32;

typedef struct
{
      _s390_regs_common32 regs;
      _s390_fp_regs32     fpregs;
} _sigregs32;

#define _SIGCONTEXT_NSIG32    64
#define _SIGCONTEXT_NSIG_BPW32      32
#define __SIGNAL_FRAMESIZE32  96
#define _SIGMASK_COPY_SIZE32  (sizeof(u32)*2)

struct sigcontext32
{
      __u32 oldmask[_COMPAT_NSIG_WORDS];
      __u32 sregs;                        /* pointer */
};

/* asm/signal.h */
struct sigaction32 {
      __u32       sa_handler;       /* pointer */
      __u32       sa_flags;
        __u32           sa_restorer;            /* pointer */
      compat_sigset_t   sa_mask;        /* mask last for extensibility */
};

typedef struct {
      __u32             ss_sp;            /* pointer */
      int               ss_flags;
      compat_size_t           ss_size;
} stack_t32;

/* asm/ucontext.h */
struct ucontext32 {
      __u32             uc_flags;
      __u32             uc_link;    /* pointer */     
      stack_t32         uc_stack;
      _sigregs32        uc_mcontext;
      compat_sigset_t         uc_sigmask; /* mask last for extensibility */
};

#endif /* _ASM_S390X_S390_H */

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