path: root/include/linux/compat.h

#ifndef _LINUX_COMPAT_H
#define _LINUX_COMPAT_H
/*
 * These are the type definitions for the architecture specific
 * syscall compatibility layer.
 */

#ifdef CONFIG_COMPAT

#include <linux/stat.h>
#include <linux/param.h>	/* for HZ */
#include <linux/sem.h>
#include <linux/socket.h>
#include <linux/if.h>
#include <linux/fs.h>
#include <linux/aio_abi.h>	/* for aio_context_t */

#include <asm/compat.h>
#include <asm/siginfo.h>
#include <asm/signal.h>

#ifndef COMPAT_USE_64BIT_TIME
#define COMPAT_USE_64BIT_TIME 0
#endif

#ifndef __SC_DELOUSE
#define __SC_DELOUSE(t,v) ((t)(unsigned long)(v))
#endif

#define COMPAT_SYSCALL_DEFINE1(name, ...) \
        COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_DEFINE2(name, ...) \
	COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_DEFINE3(name, ...) \
	COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_DEFINE4(name, ...) \
	COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_DEFINE5(name, ...) \
	COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
#define COMPAT_SYSCALL_DEFINE6(name, ...) \
	COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)

#define COMPAT_SYSCALL_DEFINEx(x, name, ...)				\
	asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
	static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
	asmlinkage long compat_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__))\
	{								\
		return C_SYSC##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));	\
	}								\
	SYSCALL_ALIAS(compat_sys##name, compat_SyS##name);		\
	static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__))

#ifndef compat_user_stack_pointer
#define compat_user_stack_pointer() current_user_stack_pointer()
#endif
#ifndef compat_sigaltstack	/* we'll need that for MIPS */
typedef struct compat_sigaltstack {
	compat_uptr_t			ss_sp;
	int				ss_flags;
	compat_size_t			ss_size;
} compat_stack_t;
#endif

#define compat_jiffies_to_clock_t(x)	\
		(((unsigned long)(x) * COMPAT_USER_HZ) / HZ)

typedef __compat_uid32_t	compat_uid_t;
typedef __compat_gid32_t	compat_gid_t;

struct compat_sel_arg_struct;
struct rusage;

struct compat_itimerspec {
	struct compat_timespec it_interval;
	struct compat_timespec it_value;
};

struct compat_utimbuf {
	compat_time_t		actime;
	compat_time_t		modtime;
};

struct compat_itimerval {
	struct compat_timeval	it_interval;
	struct compat_timeval	it_value;
};

struct compat_tms {
	compat_clock_t		tms_utime;
	compat_clock_t		tms_stime;
	compat_clock_t		tms_cutime;
	compat_clock_t		tms_cstime;
};

struct compat_timex {
	compat_uint_t modes;
	compat_long_t offset;
	compat_long_t freq;
	compat_long_t maxerror;
	compat_long_t esterror;
	compat_int_t status;
	compat_long_t constant;
	compat_long_t precision;
	compat_long_t tolerance;
	struct compat_timeval time;
	compat_long_t tick;
	compat_long_t ppsfreq;
	compat_long_t jitter;
	compat_int_t shift;
	compat_long_t stabil;
	compat_long_t jitcnt;
	compat_long_t calcnt;
	compat_long_t errcnt;
	compat_long_t stbcnt;
	compat_int_t tai;

	compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
	compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
	compat_int_t:32; compat_int_t:32; compat_int_t:32;
};

#define _COMPAT_NSIG_WORDS	(_COMPAT_NSIG / _COMPAT_NSIG_BPW)

typedef struct {
	compat_sigset_word	sig[_COMPAT_NSIG_WORDS];
} compat_sigset_t;

struct compat_sigaction {
#ifndef __ARCH_HAS_ODD_SIGACTION
	compat_uptr_t			sa_handler;
	compat_ulong_t			sa_flags;
#else
	compat_ulong_t			sa_flags;
	compat_uptr_t			sa_handler;
#endif
#ifdef __ARCH_HAS_SA_RESTORER
	compat_uptr_t			sa_restorer;
#endif
	compat_sigset_t			sa_mask __packed;
};

/*
 * These functions operate strictly on struct compat_time*
 */
extern int get_compat_timespec(struct timespec *,
			       const struct compat_timespec __user *);
extern int put_compat_timespec(const struct timespec *,
			       struct compat_timespec __user *);
extern int get_compat_timeval(struct timeval *,
			      const struct compat_timeval __user *);
extern int put_compat_timeval(const struct timeval *,
			      struct compat_timeval __user *);
/*
 * These functions operate on 32- or 64-bit specs depending on
 * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments and the
 * naming as compat_get/put_ rather than get/put_compat_.
 */
extern int compat_get_timespec(struct timespec *, const void __user *);
extern int compat_put_timespec(const struct timespec *, void __user *);
extern int compat_get_timeval(struct timeval *, const void __user *);
extern int compat_put_timeval(const struct timeval *, void __user *);

struct compat_iovec {
	compat_uptr_t	iov_base;
	compat_size_t	iov_len;
};

struct compat_rlimit {
	compat_ulong_t	rlim_cur;
	compat_ulong_t	rlim_max;
};

struct compat_rusage {
	struct compat_timeval ru_utime;
	struct compat_timeval ru_stime;
	compat_long_t	ru_maxrss;
	compat_long_t	ru_ixrss;
	compat_long_t	ru_idrss;
	compat_long_t	ru_isrss;
	compat_long_t	ru_minflt;
	compat_long_t	ru_majflt;
	compat_long_t	ru_nswap;
	compat_long_t	ru_inblock;
	compat_long_t	ru_oublock;
	compat_long_t	ru_msgsnd;
	compat_long_t	ru_msgrcv;
	compat_long_t	ru_nsignals;
	compat_long_t	ru_nvcsw;
	compat_long_t	ru_nivcsw;
};

extern int put_compat_rusage(const struct rusage *,
			     struct compat_rusage __user *);

struct compat_siginfo;

extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
		struct compat_siginfo __user *, int,
		struct compat_rusage __user *);

struct compat_dirent {
	u32		d_ino;
	compat_off_t	d_off;
	u16		d_reclen;
	char		d_name[256];
};

struct compat_ustat {
	compat_daddr_t		f_tfree;
	compat_ino_t		f_tinode;
	char			f_fname[6];
	char			f_fpack[6];
};

#define COMPAT_SIGEV_PAD_SIZE	((SIGEV_MAX_SIZE/sizeof(int)) - 3)

typedef struct compat_sigevent {
	compat_sigval_t sigev_value;
	compat_int_t sigev_signo;
	compat_int_t sigev_notify;
	union {
		compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
		compat_int_t _tid;

		struct {
			compat_uptr_t _function;
			compat_uptr_t _attribute;
		} _sigev_thread;
	} _sigev_un;
} compat_sigevent_t;

struct compat_ifmap {
	compat_ulong_t mem_start;
	compat_ulong_t mem_end;
	unsigned short base_addr;
	unsigned char irq;
	unsigned char dma;
	unsigned char port;
};

struct compat_if_settings {
	unsigned int type;	/* Type of physical device or protocol */
	unsigned int size;	/* Size of the data allocated by the caller */
	compat_uptr_t ifs_ifsu;	/* union of pointers */
};

struct compat_ifreq {
	union {
		char	ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
	} ifr_ifrn;
	union {
		struct	sockaddr ifru_addr;
		struct	sockaddr ifru_dstaddr;
		struct	sockaddr ifru_broadaddr;
		struct	sockaddr ifru_netmask;
		struct	sockaddr ifru_hwaddr;
		short	ifru_flags;
		compat_int_t	ifru_ivalue;
		compat_int_t	ifru_mtu;
		struct	compat_ifmap ifru_map;
		char	ifru_slave[IFNAMSIZ];   /* Just fits the size */
		char	ifru_newname[IFNAMSIZ];
		compat_caddr_t	ifru_data;
		struct	compat_if_settings ifru_settings;
	} ifr_ifru;
};

struct compat_ifconf {
	compat_int_t	ifc_len;                /* size of buffer */
	compat_caddr_t  ifcbuf;
};

struct compat_robust_list {
	compat_uptr_t			next;