compat_linux.h

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#ifndef _ASM_S390X_S390_H
#define _ASM_S390X_S390_H

#include <linux/compat.h>
#include <linux/socket.h>
#include <linux/syscalls.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 */
};

/* 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 */
};

struct stat64_emu31;
struct mmap_arg_struct_emu31;
struct fadvise64_64_args;
struct old_sigaction32;
struct old_sigaction32;

long sys32_chown16(const char __user * filename, u16 user, u16 group);
long sys32_lchown16(const char __user * filename, u16 user, u16 group);
long sys32_fchown16(unsigned int fd, u16 user, u16 group);
long sys32_setregid16(u16 rgid, u16 egid);
long sys32_setgid16(u16 gid);
long sys32_setreuid16(u16 ruid, u16 euid);
long sys32_setuid16(u16 uid);
long sys32_setresuid16(u16 ruid, u16 euid, u16 suid);
long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid);
long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid);
long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid);
long sys32_setfsuid16(u16 uid);
long sys32_setfsgid16(u16 gid);
long sys32_getgroups16(int gidsetsize, u16 __user *grouplist);
long sys32_setgroups16(int gidsetsize, u16 __user *grouplist);
long sys32_getuid16(void);
long sys32_geteuid16(void);
long sys32_getgid16(void);
long sys32_getegid16(void);
long sys32_ipc(u32 call, int first, int second, int third, u32 ptr);
long sys32_truncate64(const char __user * path, unsigned long high,
              unsigned long low);
long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low);
long sys32_sched_rr_get_interval(compat_pid_t pid,
                 struct compat_timespec __user *interval);
long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
              compat_sigset_t __user *oset, size_t sigsetsize);
long sys32_rt_sigpending(compat_sigset_t __user *set, size_t sigsetsize);
long sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo);
long sys32_init_module(void __user *umod, unsigned long len,
               const char __user *uargs);
long sys32_delete_module(const char __user *name_user, unsigned int flags);
long sys32_pread64(unsigned int fd, char __user *ubuf, size_t count,
           u32 poshi, u32 poslo);
long sys32_pwrite64(unsigned int fd, const char __user *ubuf,
            size_t count, u32 poshi, u32 poslo);
compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count);
long sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset,
            size_t count);
long sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset,
              s32 count);
long sys32_stat64(const char __user * filename, struct stat64_emu31 __user * statbuf);
long sys32_lstat64(const char __user * filename,
           struct stat64_emu31 __user * statbuf);
long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf);
long sys32_fstatat64(unsigned int dfd, const char __user *filename,
             struct stat64_emu31 __user* statbuf, int flag);
unsigned long old32_mmap(struct mmap_arg_struct_emu31 __user *arg);
long sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg);
long sys32_read(unsigned int fd, char __user * buf, size_t count);
long sys32_write(unsigned int fd, const char __user * buf, size_t count);
long sys32_fadvise64(int fd, loff_t offset, size_t len, int advise);
long sys32_fadvise64_64(struct fadvise64_64_args __user *args);
long sys32_sigaction(int sig, const struct old_sigaction32 __user *act,
             struct old_sigaction32 __user *oact);
long sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
            struct sigaction32 __user *oact, size_t sigsetsize);
long sys32_sigaltstack(const stack_t32 __user *uss, stack_t32 __user *uoss);
#endif /* _ASM_S390X_S390_H */