xref: /freebsd/sys/i386/linux/linux.h (revision 9b44bfc5560bf0cf1da18eaadb3a9da279a76efa)

/*-
 * Copyright (c) 1994-1996 S�ren Schmidt
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer
 *    in this position and unchanged.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD$
 */

#ifndef _I386_LINUX_LINUX_H_
#define	_I386_LINUX_LINUX_H_

#include <sys/signal.h> /* for sigval union */
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sx.h>

#include <i386/linux/linux_syscall.h>

/*
 * debugging support
 */
extern u_char linux_debug_map[];
#define ldebug(name)	isclr(linux_debug_map, LINUX_SYS_linux_ ## name)
#define ARGS(nm, fmt)	"linux(%ld): "#nm"("fmt")\n", (long)td->td_proc->p_pid
#define LMSG(fmt)	"linux(%ld): "fmt"\n", (long)td->td_proc->p_pid

#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_LINUX);
#endif

#define	PTRIN(v)	(void *)(v)
#define	PTROUT(v)	(l_uintptr_t)(v)

/*
 * Provide a separate set of types for the Linux types.
 */
typedef int		l_int;
typedef int32_t		l_long;
typedef int64_t		l_longlong;
typedef short		l_short;
typedef unsigned int	l_uint;
typedef uint32_t	l_ulong;
typedef uint64_t	l_ulonglong;
typedef unsigned short	l_ushort;

typedef char		*l_caddr_t;
typedef l_ulong		l_uintptr_t;
typedef l_long		l_clock_t;
typedef l_int		l_daddr_t;
typedef l_ushort	l_dev_t;
typedef l_uint		l_gid_t;
typedef l_ushort	l_gid16_t;
typedef l_ulong		l_ino_t;
typedef l_int		l_key_t;
typedef l_longlong	l_loff_t;
typedef l_ushort	l_mode_t;
typedef l_long		l_off_t;
typedef l_int		l_pid_t;
typedef l_uint		l_size_t;
typedef l_long		l_suseconds_t;
typedef l_long		l_time_t;
typedef l_uint		l_uid_t;
typedef l_ushort	l_uid16_t;

typedef struct {
	l_int		val[2];
} l_fsid_t;

typedef struct {
	l_time_t	tv_sec;
	l_suseconds_t	tv_usec;
} l_timeval;

#define	l_fd_set	fd_set

/*
 * Miscellaneous
 */
#define	LINUX_NAME_MAX		255
#define	LINUX_MAX_UTSNAME	65

#define	LINUX_CTL_MAXNAME	10

struct l___sysctl_args
{
	l_int		*name;
	l_int		nlen;
	void		*oldval;
	l_size_t	*oldlenp;
	void		*newval;
	l_size_t	newlen;
	l_ulong		__spare[4];
};

/* Scheduling policies */
#define	LINUX_SCHED_OTHER	0
#define	LINUX_SCHED_FIFO	1
#define	LINUX_SCHED_RR		2

/* Resource limits */
#define	LINUX_RLIMIT_CPU	0
#define	LINUX_RLIMIT_FSIZE	1
#define	LINUX_RLIMIT_DATA	2
#define	LINUX_RLIMIT_STACK	3
#define	LINUX_RLIMIT_CORE	4
#define	LINUX_RLIMIT_RSS	5
#define	LINUX_RLIMIT_NPROC	6
#define	LINUX_RLIMIT_NOFILE	7
#define	LINUX_RLIMIT_MEMLOCK	8
#define	LINUX_RLIMIT_AS		9       /* address space limit */

#define	LINUX_RLIM_NLIMITS	10

struct l_rlimit {
	l_ulong rlim_cur;
	l_ulong rlim_max;
};

/* mmap options */
#define	LINUX_MAP_SHARED	0x0001
#define	LINUX_MAP_PRIVATE	0x0002
#define	LINUX_MAP_FIXED		0x0010
#define	LINUX_MAP_ANON		0x0020
#define	LINUX_MAP_GROWSDOWN	0x0100

/*
 * stat family of syscalls
 */
struct l_timespec {
	l_ulong		tv_sec;
	l_ulong		tv_nsec;
};

struct l_newstat {
	l_ushort	st_dev;
	l_ushort	__pad1;
	l_ulong		st_ino;
	l_ushort	st_mode;
	l_ushort	st_nlink;
	l_ushort	st_uid;
	l_ushort	st_gid;
	l_ushort	st_rdev;
	l_ushort	__pad2;
	l_ulong		st_size;
	l_ulong		st_blksize;
	l_ulong		st_blocks;
	struct l_timespec	st_atimespec;
	struct l_timespec	st_mtimespec;
	struct l_timespec	st_ctimespec;
	l_ulong		__unused4;
	l_ulong		__unused5;
};

struct l_stat {
	l_ushort        st_dev;
	l_ulong         st_ino;
	l_ushort        st_mode;
	l_ushort        st_nlink;
	l_ushort        st_uid;
	l_ushort        st_gid;
	l_ushort        st_rdev;
	l_long          st_size;
	struct l_timespec       st_atimespec;
	struct l_timespec       st_mtimespec;
	struct l_timespec       st_ctimespec;
	l_long          st_blksize;
	l_long          st_blocks;
	l_ulong         st_flags;
	l_ulong         st_gen;
};

struct l_stat64 {
	l_ushort	st_dev;
	u_char		__pad0[10];
	l_ulong		__st_ino;
	l_uint		st_mode;
	l_uint		st_nlink;
	l_ulong		st_uid;
	l_ulong		st_gid;
	l_ushort	st_rdev;
	u_char		__pad3[10];
	l_longlong	st_size;
	l_ulong		st_blksize;
	l_ulong		st_blocks;
	l_ulong		__pad4;
	struct l_timespec	st_atimespec;
	struct l_timespec	st_mtimespec;
	struct l_timespec	st_ctimespec;
	l_ulonglong	st_ino;
};

struct l_new_utsname {
	char	sysname[LINUX_MAX_UTSNAME];
	char	nodename[LINUX_MAX_UTSNAME];
	char	release[LINUX_MAX_UTSNAME];
	char	version[LINUX_MAX_UTSNAME];
	char	machine[LINUX_MAX_UTSNAME];
	char	domainname[LINUX_MAX_UTSNAME];
};

/*
 * Signalling
 */
#define	LINUX_SIGHUP		1
#define	LINUX_SIGINT		2
#define	LINUX_SIGQUIT		3
#define	LINUX_SIGILL		4
#define	LINUX_SIGTRAP		5
#define	LINUX_SIGABRT		6
#define	LINUX_SIGIOT		LINUX_SIGABRT
#define	LINUX_SIGBUS		7
#define	LINUX_SIGFPE		8
#define	LINUX_SIGKILL		9
#define	LINUX_SIGUSR1		10
#define	LINUX_SIGSEGV		11
#define	LINUX_SIGUSR2		12
#define	LINUX_SIGPIPE		13
#define	LINUX_SIGALRM		14
#define	LINUX_SIGTERM		15
#define	LINUX_SIGSTKFLT		16
#define	LINUX_SIGCHLD		17
#define	LINUX_SIGCONT		18
#define	LINUX_SIGSTOP		19
#define	LINUX_SIGTSTP		20
#define	LINUX_SIGTTIN		21
#define	LINUX_SIGTTOU		22
#define	LINUX_SIGURG		23
#define	LINUX_SIGXCPU		24
#define	LINUX_SIGXFSZ		25
#define	LINUX_SIGVTALRM		26
#define	LINUX_SIGPROF		27
#define	LINUX_SIGWINCH		28
#define	LINUX_SIGIO		29
#define	LINUX_SIGPOLL		LINUX_SIGIO
#define	LINUX_SIGPWR		30
#define	LINUX_SIGSYS		31

#define	LINUX_SIGTBLSZ		31
#define	LINUX_NSIG_WORDS	2
#define	LINUX_NBPW		32
#define	LINUX_NSIG		(LINUX_NBPW * LINUX_NSIG_WORDS)

/* sigaction flags */
#define	LINUX_SA_NOCLDSTOP	0x00000001
#define	LINUX_SA_NOCLDWAIT	0x00000002
#define	LINUX_SA_SIGINFO	0x00000004
#define	LINUX_SA_RESTORER	0x04000000
#define	LINUX_SA_ONSTACK	0x08000000
#define	LINUX_SA_RESTART	0x10000000
#define	LINUX_SA_INTERRUPT	0x20000000
#define	LINUX_SA_NOMASK		0x40000000
#define	LINUX_SA_ONESHOT	0x80000000

/* sigprocmask actions */
#define	LINUX_SIG_BLOCK		0
#define	LINUX_SIG_UNBLOCK	1
#define	LINUX_SIG_SETMASK	2

/* sigset_t macros */
#define	LINUX_SIGEMPTYSET(set)		(set).__bits[0] = (set).__bits[1] = 0
#define	LINUX_SIGISMEMBER(set, sig)	SIGISMEMBER(set, sig)
#define	LINUX_SIGADDSET(set, sig)	SIGADDSET(set, sig)

/* sigaltstack */
#define LINUX_MINSIGSTKSZ	2048
#define LINUX_SS_ONSTACK	1
#define LINUX_SS_DISABLE	2

int linux_to_bsd_sigaltstack(int lsa);
int bsd_to_linux_sigaltstack(int bsa);

typedef void	(*l_handler_t)(l_int);
typedef l_ulong	l_osigset_t;

typedef struct {
	l_uint	__bits[LINUX_NSIG_WORDS];
} l_sigset_t;

typedef struct {
	l_handler_t	lsa_handler;
	l_osigset_t	lsa_mask;
	l_ulong		lsa_flags;
	void	(*lsa_restorer)(void);
} l_osigaction_t;

typedef struct {
	l_handler_t	lsa_handler;
	l_ulong		lsa_flags;
	void	(*lsa_restorer)(void);
	l_sigset_t	lsa_mask;
} l_sigaction_t;

typedef struct {
	void		*ss_sp;
	l_int		ss_flags;
	l_size_t	ss_size;
} l_stack_t;

/* The Linux sigcontext, pretty much a standard 386 trapframe. */
struct l_sigcontext {
	l_int		sc_gs;
	l_int		sc_fs;
	l_int		sc_es;
	l_int		sc_ds;
	l_int		sc_edi;
	l_int		sc_esi;
	l_int		sc_ebp;
	l_int		sc_esp;
	l_int		sc_ebx;
	l_int		sc_edx;
	l_int		sc_ecx;
	l_int		sc_eax;
	l_int		sc_trapno;
	l_int		sc_err;
	l_int		sc_eip;
	l_int		sc_cs;
	l_int		sc_eflags;
	l_int		sc_esp_at_signal;
	l_int		sc_ss;
	l_int		sc_387;
	l_int		sc_mask;
	l_int		sc_cr2;
};

struct l_ucontext {
	l_ulong		uc_flags;
	void		*uc_link;
	l_stack_t	uc_stack;
	struct l_sigcontext	uc_mcontext;
        l_sigset_t	uc_sigmask;
};

#define LINUX_SI_MAX_SIZE     128
#define LINUX_SI_PAD_SIZE     ((LINUX_SI_MAX_SIZE/sizeof(l_int)) - 3)

typedef struct l_siginfo {
	l_int		lsi_signo;
	l_int		lsi_errno;
	l_int		lsi_code;
	union {
		l_int	_pad[LINUX_SI_PAD_SIZE];

		struct {
			l_pid_t		_pid;
			l_uid16_t	_uid;
		} _kill;

		struct {
			l_uint		_timer1;
			l_uint		_timer2;
		} _timer;

		struct {
			l_pid_t		_pid;		/* sender's pid */
			l_uid16_t	_uid;		/* sender's uid */
			union sigval _sigval;
		} _rt;

		struct {
			l_pid_t		_pid;		/* which child */
			l_uid16_t	_uid;		/* sender's uid */
			l_int		_status;	/* exit code */
			l_clock_t	_utime;
			l_clock_t	_stime;
		} _sigchld;

		struct {
			void		*_addr; /* faulting insn/memory ref. */
		} _sigfault;

		struct {
			l_int		_band;  /* POLL_IN,POLL_OUT,POLL_MSG */
			l_int		_fd;
		} _sigpoll;
	} _sifields;
} l_siginfo_t;

#define lsi_pid          _sifields._kill._pid
#define lsi_uid          _sifields._kill._uid
#define lsi_status       _sifields._sigchld._status
#define lsi_utime        _sifields._sigchld._utime
#define lsi_stime        _sifields._sigchld._stime
#define lsi_value        _sifields._rt._sigval
#define lsi_int          _sifields._rt._sigval.sival_int
#define lsi_ptr          _sifields._rt._sigval.sival_ptr
#define lsi_addr         _sifields._sigfault._addr
#define lsi_band         _sifields._sigpoll._band
#define lsi_fd           _sifields._sigpoll._fd

struct l_fpreg {
	u_int16_t significand[4];
	u_int16_t exponent;
};

struct l_fpxreg {
	u_int16_t significand[4];
	u_int16_t exponent;
	u_int16_t padding[3];
};

struct l_xmmreg {
	u_int32_t element[4];
};

struct l_fpstate {
	/* Regular FPU environment */
	u_int32_t		cw;
	u_int32_t		sw;
	u_int32_t		tag;
	u_int32_t		ipoff;
	u_int32_t		cssel;
	u_int32_t		dataoff;
	u_int32_t		datasel;
	struct l_fpreg		_st[8];
	u_int16_t		status;
	u_int16_t		magic;  /* 0xffff = regular FPU data */

	/* FXSR FPU environment */
	u_int32_t		_fxsr_env[6]; /* env is ignored */
	u_int32_t		mxcsr;
	u_int32_t		reserved;
	struct l_fpxreg		_fxsr_st[8];  /* reg data is ignored */
	struct l_xmmreg		_xmm[8];
	u_int32_t		padding[56];
};

/*
 * We make the stack look like Linux expects it when calling a signal
 * handler, but use the BSD way of calling the handler and sigreturn().
 * This means that we need to pass the pointer to the handler too.
 * It is appended to the frame to not interfere with the rest of it.
 */
struct l_sigframe {
	l_int			sf_sig;
	struct l_sigcontext	sf_sc;
	struct l_fpstate	sf_fpstate;
	l_uint			sf_extramask[LINUX_NSIG_WORDS-1];
	l_handler_t		sf_handler;
};

struct l_rt_sigframe {
	l_int			sf_sig;
	l_siginfo_t 		*sf_siginfo;
	struct l_ucontext	*sf_ucontext;
	l_siginfo_t		sf_si;
	struct l_ucontext 	sf_sc;
	l_handler_t 		sf_handler;
};

extern int bsd_to_linux_signal[];
extern int linux_to_bsd_signal[];
extern struct sysentvec linux_sysvec;
extern struct sysentvec elf_linux_sysvec;

/*
 * Pluggable ioctl handlers
 */
struct linux_ioctl_args;
struct thread;

typedef int linux_ioctl_function_t(struct thread *, struct linux_ioctl_args *);

struct linux_ioctl_handler {
	linux_ioctl_function_t *func;
	int	low, high;
};

int	linux_ioctl_register_handler(struct linux_ioctl_handler *h);
int	linux_ioctl_unregister_handler(struct linux_ioctl_handler *h);

/*
 * open/fcntl flags
 */
#define	LINUX_O_RDONLY		00
#define	LINUX_O_WRONLY		01
#define	LINUX_O_RDWR		02
#define	LINUX_O_CREAT		0100
#define	LINUX_O_EXCL		0200
#define	LINUX_O_NOCTTY		0400
#define	LINUX_O_TRUNC		01000
#define	LINUX_O_APPEND		02000
#define	LINUX_O_NONBLOCK	04000
#define	LINUX_O_NDELAY		LINUX_O_NONBLOCK
#define	LINUX_O_SYNC		010000
#define	LINUX_FASYNC		020000
#define	LINUX_O_DIRECT		040000	/* direct disk access hint */
#define	LINUX_O_LARGEFILE	0100000
#define	LINUX_O_DIRECTORY	0200000	/* must be a directory */
#define	LINUX_O_NOFOLLOW	0400000	/* don't follow links */
#define	LINUX_O_NOATIME		01000000

#define	LINUX_F_DUPFD		0
#define	LINUX_F_GETFD		1
#define	LINUX_F_SETFD		2
#define	LINUX_F_GETFL		3
#define	LINUX_F_SETFL		4
#define	LINUX_F_GETLK		5
#define	LINUX_F_SETLK		6
#define	LINUX_F_SETLKW		7
#define	LINUX_F_SETOWN		8
#define	LINUX_F_GETOWN		9

#define	LINUX_F_GETLK64		12
#define	LINUX_F_SETLK64		13
#define	LINUX_F_SETLKW64	14

#define	LINUX_F_RDLCK		0
#define	LINUX_F_WRLCK		1
#define	LINUX_F_UNLCK		2

/*
 * mount flags
 */
#define LINUX_MS_RDONLY         0x0001
#define LINUX_MS_NOSUID         0x0002
#define LINUX_MS_NODEV          0x0004
#define LINUX_MS_NOEXEC         0x0008
#define LINUX_MS_REMOUNT        0x0020

/*
 * SystemV IPC defines
 */
#define	LINUX_SEMOP		1
#define	LINUX_SEMGET		2
#define	LINUX_SEMCTL		3
#define	LINUX_MSGSND		11
#define	LINUX_MSGRCV		12
#define	LINUX_MSGGET		13
#define	LINUX_MSGCTL		14
#define	LINUX_SHMAT		21
#define	LINUX_SHMDT		22
#define	LINUX_SHMGET		23
#define	LINUX_SHMCTL		24

#define	LINUX_IPC_RMID		0
#define	LINUX_IPC_SET		1
#define	LINUX_IPC_STAT		2
#define	LINUX_IPC_INFO		3

#define	LINUX_SHM_LOCK		11
#define	LINUX_SHM_UNLOCK	12
#define	LINUX_SHM_STAT		13
#define	LINUX_SHM_INFO		14

#define	LINUX_SHM_RDONLY	0x1000
#define	LINUX_SHM_RND		0x2000
#define	LINUX_SHM_REMAP		0x4000

/* semctl commands */
#define	LINUX_GETPID		11
#define	LINUX_GETVAL		12
#define	LINUX_GETALL		13
#define	LINUX_GETNCNT		14
#define	LINUX_GETZCNT		15
#define	LINUX_SETVAL		16
#define	LINUX_SETALL		17
#define	LINUX_SEM_STAT		18
#define	LINUX_SEM_INFO		19

union l_semun {
	l_int		val;
	struct l_semid_ds	*buf;
	l_ushort	*array;
	struct l_seminfo	*__buf;
	void		*__pad;
};

/*
 * Socket defines
 */
#define	LINUX_SOCKET 		1
#define	LINUX_BIND		2
#define	LINUX_CONNECT 		3
#define	LINUX_LISTEN 		4
#define	LINUX_ACCEPT 		5
#define	LINUX_GETSOCKNAME	6
#define	LINUX_GETPEERNAME	7
#define	LINUX_SOCKETPAIR	8
#define	LINUX_SEND		9
#define	LINUX_RECV		10
#define	LINUX_SENDTO 		11
#define	LINUX_RECVFROM 		12
#define	LINUX_SHUTDOWN 		13
#define	LINUX_SETSOCKOPT	14
#define	LINUX_GETSOCKOPT	15
#define	LINUX_SENDMSG		16
#define	LINUX_RECVMSG		17

#define	LINUX_AF_UNSPEC		0
#define	LINUX_AF_UNIX		1
#define	LINUX_AF_INET		2
#define	LINUX_AF_AX25		3
#define	LINUX_AF_IPX		4
#define	LINUX_AF_APPLETALK	5
#define	LINUX_AF_INET6		10

#define	LINUX_SOL_SOCKET	1
#define	LINUX_SOL_IP		0
#define	LINUX_SOL_IPX		256
#define	LINUX_SOL_AX25		257
#define	LINUX_SOL_TCP		6
#define	LINUX_SOL_UDP		17

#define	LINUX_SO_DEBUG		1
#define	LINUX_SO_REUSEADDR	2
#define	LINUX_SO_TYPE		3
#define	LINUX_SO_ERROR		4
#define	LINUX_SO_DONTROUTE	5
#define	LINUX_SO_BROADCAST	6
#define	LINUX_SO_SNDBUF		7
#define	LINUX_SO_RCVBUF		8
#define	LINUX_SO_KEEPALIVE	9
#define	LINUX_SO_OOBINLINE	10
#define	LINUX_SO_NO_CHECK	11
#define	LINUX_SO_PRIORITY	12
#define	LINUX_SO_LINGER		13

#define	LINUX_IP_TOS		1
#define	LINUX_IP_TTL		2
#define	LINUX_IP_HDRINCL	3
#define	LINUX_IP_OPTIONS	4

#define	LINUX_IP_MULTICAST_IF		32
#define	LINUX_IP_MULTICAST_TTL		33
#define	LINUX_IP_MULTICAST_LOOP		34
#define	LINUX_IP_ADD_MEMBERSHIP		35
#define	LINUX_IP_DROP_MEMBERSHIP	36

struct l_sockaddr {
	l_ushort	sa_family;
	char		sa_data[14];
};

struct l_ifmap {
	l_ulong		mem_start;
	l_ulong		mem_end;
	l_ushort	base_addr;
	u_char		irq;
	u_char		dma;
	u_char		port;
};

#define	LINUX_IFHWADDRLEN	6
#define	LINUX_IFNAMSIZ		16

struct l_ifreq {
	union {
		char	ifrn_name[LINUX_IFNAMSIZ];
	} ifr_ifrn;

	union {
		struct l_sockaddr	ifru_addr;
		struct l_sockaddr	ifru_dstaddr;
		struct l_sockaddr	ifru_broadaddr;
		struct l_sockaddr	ifru_netmask;
		struct l_sockaddr	ifru_hwaddr;
		l_short		ifru_flags[1];
		l_int		ifru_metric;
		l_int		ifru_mtu;
		struct l_ifmap	ifru_map;
		char		ifru_slave[LINUX_IFNAMSIZ];
		l_caddr_t	ifru_data;
	} ifr_ifru;
};

#define	ifr_name	ifr_ifrn.ifrn_name	/* interface name */
#define	ifr_hwaddr	ifr_ifru.ifru_hwaddr	/* MAC address */

/*
 * poll()
 */
#define	LINUX_POLLIN		0x0001
#define	LINUX_POLLPRI		0x0002
#define	LINUX_POLLOUT		0x0004
#define	LINUX_POLLERR		0x0008
#define	LINUX_POLLHUP		0x0010
#define	LINUX_POLLNVAL		0x0020
#define	LINUX_POLLRDNORM	0x0040
#define	LINUX_POLLRDBAND	0x0080
#define	LINUX_POLLWRNORM	0x0100
#define	LINUX_POLLWRBAND	0x0200
#define	LINUX_POLLMSG		0x0400

struct l_pollfd {
	l_int		fd;
	l_short		events;
	l_short		revents;
};

struct l_user_desc {
	l_uint		entry_number;
	l_uint		base_addr;
	l_uint		limit;
	l_uint		seg_32bit:1;
	l_uint		contents:2;
	l_uint		read_exec_only:1;
	l_uint		limit_in_pages:1;
	l_uint		seg_not_present:1;
	l_uint		useable:1;
};

struct l_desc_struct {
           unsigned long a,b;
};


#define LINUX_LOWERWORD	0x0000ffff

/* macros which does the same thing as those in linux include/asm-um/ldt-i386.h
 * these convert linux user-space descriptor to machine one
 */
#define LDT_entry_a(info) \
        ((((info)->base_addr & LINUX_LOWERWORD) << 16) | ((info)->limit & LINUX_LOWERWORD))

#define ENTRY_B_READ_EXEC_ONLY	9
#define ENTRY_B_CONTENTS	10
#define ENTRY_B_SEG_NOT_PRESENT	15
#define ENTRY_B_BASE_ADDR	16
#define ENTRY_B_USEABLE		20
#define ENTRY_B_SEG32BIT	22
#define ENTRY_B_LIMIT		23

#define LDT_entry_b(info) \
        (((info)->base_addr & 0xff000000) | \
        ((info)->limit & 0xf0000) | \
        ((info)->contents << ENTRY_B_CONTENTS) | \
        (((info)->seg_not_present == 0) << ENTRY_B_SEG_NOT_PRESENT) | \
        (((info)->base_addr & 0x00ff0000) >> ENTRY_B_BASE_ADDR) | \
        (((info)->read_exec_only == 0) << ENTRY_B_READ_EXEC_ONLY) | \
        ((info)->seg_32bit << ENTRY_B_SEG32BIT) | \
        ((info)->useable << ENTRY_B_USEABLE) | \
        ((info)->limit_in_pages << ENTRY_B_LIMIT) | 0x7000)

#define LDT_empty(info) (\
        (info)->base_addr       == 0    && \
        (info)->limit           == 0    && \
        (info)->contents        == 0    && \
        (info)->seg_not_present == 1    && \
        (info)->read_exec_only  == 1    && \
        (info)->seg_32bit       == 0    && \
        (info)->limit_in_pages  == 0    && \
        (info)->useable         == 0    )

/* macros for converting segments, they do the same as those in arch/i386/kernel/process.c */
#define GET_BASE(desc) ( \
        (((desc)->a >> 16) & LINUX_LOWERWORD) | \
        (((desc)->b << 16) & 0x00ff0000) | \
        ( (desc)->b        & 0xff000000)   )

#define GET_LIMIT(desc) ( \
        ((desc)->a & LINUX_LOWERWORD) | \
         ((desc)->b & 0xf0000) )

#define GET_32BIT(desc)         (((desc)->b >> ENTRY_B_SEG32BIT) & 1)
#define GET_CONTENTS(desc)      (((desc)->b >> ENTRY_B_CONTENTS) & 3)
#define GET_WRITABLE(desc)      (((desc)->b >> ENTRY_B_READ_EXEC_ONLY) & 1)
#define GET_LIMIT_PAGES(desc)   (((desc)->b >> ENTRY_B_LIMIT) & 1)
#define GET_PRESENT(desc)       (((desc)->b >> ENTRY_B_SEG_NOT_PRESENT) & 1)
#define GET_USEABLE(desc)       (((desc)->b >> ENTRY_B_USEABLE) & 1)

#define LINUX_CLOCK_REALTIME            0
#define LINUX_CLOCK_MONOTONIC           1
#define LINUX_CLOCK_PROCESS_CPUTIME_ID  2
#define LINUX_CLOCK_THREAD_CPUTIME_ID   3
#define LINUX_CLOCK_REALTIME_HR         4
#define LINUX_CLOCK_MONOTONIC_HR        5

typedef int l_timer_t;
typedef int l_mqd_t;

#define CLONE_VM        0x100
#define CLONE_FS        0x200
#define CLONE_FILES     0x400
#define CLONE_SIGHAND   0x800
#define CLONE_PID       0x1000          /* this flag does not exist in linux anymore */
#define CLONE_PARENT    0x00008000
#define CLONE_THREAD    0x10000
#define CLONE_SETTLS    0x80000
#define CLONE_CHILD_CLEARTID    0x00200000
#define CLONE_CHILD_SETTID      0x01000000
#define CLONE_PARENT_SETTID     0x00100000

#define THREADING_FLAGS (CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND)

#endif /* !_I386_LINUX_LINUX_H_ */