[linux-2.6-block.git] / arch / x86 / include / asm / compat.h

#ifndef _ASM_X86_COMPAT_H
#define _ASM_X86_COMPAT_H

/*
 * Architecture specific compatibility types
 */
#include <linux/types.h>
#include <linux/sched.h>
#include <asm/processor.h>
#include <asm/user32.h>
#include <asm/unistd.h>

#define COMPAT_USER_HZ		100
#define COMPAT_UTS_MACHINE	"i686\0\0"

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 u16		__compat_uid_t;
typedef u16		__compat_gid_t;
typedef u32		__compat_uid32_t;
typedef u32		__compat_gid32_t;
typedef u16		compat_mode_t;
typedef u32		compat_ino_t;
typedef u16		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 __kernel_fsid_t	compat_fsid_t;
typedef s32		compat_timer_t;
typedef s32		compat_key_t;

typedef s32		compat_int_t;
typedef s32		compat_long_t;
typedef s64 __attribute__((aligned(4))) compat_s64;
typedef u32		compat_uint_t;
typedef u32		compat_ulong_t;
typedef u64 __attribute__((aligned(4))) compat_u64;
typedef u32		compat_uptr_t;

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;
	u16		__pad1;
	compat_ino_t	st_ino;
	compat_mode_t	st_mode;
	compat_nlink_t	st_nlink;
	__compat_uid_t	st_uid;
	__compat_gid_t	st_gid;
	compat_dev_t	st_rdev;
	u16		__pad2;
	u32		st_size;
	u32		st_blksize;
	u32		st_blocks;
	u32		st_atime;
	u32		st_atime_nsec;
	u32		st_mtime;
	u32		st_mtime_nsec;
	u32		st_ctime;
	u32		st_ctime_nsec;
	u32		__unused4;
	u32		__unused5;
};

struct compat_flock {
	short		l_type;
	short		l_whence;
	compat_off_t	l_start;
	compat_off_t	l_len;
	compat_pid_t	l_pid;
};

#define F_GETLK64	12	/*  using 'struct flock64' */
#define F_SETLK64	13
#define F_SETLKW64	14

/*
 * IA32 uses 4 byte alignment for 64 bit quantities,
 * so we need to pack this structure.
 */
struct compat_flock64 {
	short		l_type;
	short		l_whence;
	compat_loff_t	l_start;
	compat_loff_t	l_len;
	compat_pid_t	l_pid;
} __attribute__((packed));

struct compat_statfs {
	int		f_type;
	int		f_bsize;
	int		f_blocks;
	int		f_bfree;
	int		f_bavail;
	int		f_files;
	int		f_ffree;
	compat_fsid_t	f_fsid;
	int		f_namelen;	/* SunOS ignores this field. */
	int		f_frsize;
	int		f_flags;
	int		f_spare[4];
};

#define COMPAT_RLIM_OLD_INFINITY	0x7fffffff
#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;

typedef union compat_sigval {
	compat_int_t	sival_int;
	compat_uptr_t	sival_ptr;
} compat_sigval_t;

typedef struct compat_siginfo {
	int si_signo;
	int si_errno;
	int si_code;

	union {
		int _pad[128/sizeof(int) - 3];

		/* kill() */
		struct {
			unsigned int _pid;	/* sender's pid */
			unsigned int _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 */
			int _overrun_incr;	/* amount to add to overrun */
		} _timer;

		/* POSIX.1b signals */
		struct {
			unsigned int _pid;	/* sender's pid */
			unsigned int _uid;	/* sender's uid */
			compat_sigval_t _sigval;
		} _rt;

		/* SIGCHLD */
		struct {
			unsigned int _pid;	/* which child */
			unsigned int _uid;	/* sender's uid */
			int _status;		/* exit code */
			compat_clock_t _utime;
			compat_clock_t _stime;
		} _sigchld;

		/* SIGCHLD (x32 version) */
		struct {
			unsigned int _pid;	/* which child */
			unsigned int _uid;	/* sender's uid */
			int _status;		/* exit code */
			compat_s64 _utime;
			compat_s64 _stime;
		} _sigchld_x32;

		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
		struct {
			unsigned int _addr;	/* faulting insn/memory ref. */
		} _sigfault;

		/* SIGPOLL */
		struct {
			int _band;	/* POLL_IN, POLL_OUT, POLL_MSG */
			int _fd;
		} _sigpoll;

		struct {
			unsigned int _call_addr; /* calling insn */
			int _syscall;	/* triggering system call number */
			unsigned int _arch;	/* AUDIT_ARCH_* of syscall */
		} _sigsys;
	} _sifields;
} compat_siginfo_t;

#define COMPAT_OFF_T_MAX	0x7fffffff
#define COMPAT_LOFF_T_MAX	0x7fffffffffffffffL

struct compat_ipc64_perm {
	compat_key_t key;
	__compat_uid32_t uid;
	__compat_gid32_t gid;
	__compat_uid32_t cuid;
	__compat_gid32_t cgid;
	unsigned short mode;
	unsigned short __pad1;
	unsigned short seq;
	unsigned short __pad2;
	compat_ulong_t unused1;
	compat_ulong_t unused2;
};

struct compat_semid64_ds {
	struct compat_ipc64_perm sem_perm;
	compat_time_t  sem_otime;
	compat_ulong_t __unused1;
	compat_time_t  sem_ctime;
	compat_ulong_t __unused2;
	compat_ulong_t sem_nsems;
	compat_ulong_t __unused3;
	compat_ulong_t __unused4;
};

struct compat_msqid64_ds {
	struct compat_ipc64_perm msg_perm;
	compat_time_t  msg_stime;
	compat_ulong_t __unused1;
	compat_time_t  msg_rtime;
	compat_ulong_t __unused2;
	compat_time_t  msg_ctime;
	compat_ulong_t __unused3;
	compat_ulong_t msg_cbytes;
	compat_ulong_t msg_qnum;
	compat_ulong_t msg_qbytes;
	compat_pid_t   msg_lspid;
	compat_pid_t   msg_lrpid;
	compat_ulong_t __unused4;
	compat_ulong_t __unused5;
};

struct compat_shmid64_ds {
	struct compat_ipc64_perm shm_perm;
	compat_size_t  shm_segsz;
	compat_time_t  shm_atime;
	compat_ulong_t __unused1;
	compat_time_t  shm_dtime;
	compat_ulong_t __unused2;
	compat_time_t  shm_ctime;
	compat_ulong_t __unused3;
	compat_pid_t   shm_cpid;
	compat_pid_t   shm_lpid;
	compat_ulong_t shm_nattch;
	compat_ulong_t __unused4;
	compat_ulong_t __unused5;
};

/*
 * The type of struct elf_prstatus.pr_reg in compatible core dumps.
 */
#ifdef CONFIG_X86_X32_ABI
typedef struct user_regs_struct compat_elf_gregset_t;

#define PR_REG_SIZE(S) (test_thread_flag(TIF_IA32) ? 68 : 216)
#define PRSTATUS_SIZE(S) (test_thread_flag(TIF_IA32) ? 144 : 296)
#define SET_PR_FPVALID(S,V) \
  do { *(int *) (((void *) &((S)->pr_reg)) + PR_REG_SIZE(0)) = (V); } \
  while (0)

#define COMPAT_USE_64BIT_TIME \
	(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
#else
typedef struct user_regs_struct32 compat_elf_gregset_t;
#endif

/*
 * 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.
 */

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 *arch_compat_alloc_user_space(long len)
{
	compat_uptr_t sp;

	if (test_thread_flag(TIF_IA32)) {
		sp = task_pt_regs(current)->sp;
	} else {
		/* -128 for the x32 ABI redzone */
		sp = task_pt_regs(current)->sp - 128;
	}

	return (void __user *)round_down(sp - len, 16);
}

static inline bool in_x32_syscall(void)
{
#ifdef CONFIG_X86_X32_ABI
	if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
		return true;
#endif
	return false;
}

static inline bool in_compat_syscall(void)
{
	return in_ia32_syscall() || in_x32_syscall();
}
#define in_compat_syscall in_compat_syscall	/* override the generic impl */

#endif /* _ASM_X86_COMPAT_H */
Commit	Line	Data
1965aae3 PA	1	#ifndef _ASM_X86_COMPAT_H
1965aae3 PA	2	#define _ASM_X86_COMPAT_H
1da177e4 LT	3
	4	/*
	5	* Architecture specific compatibility types
	6	*/
	7	#include <linux/types.h>
	8	#include <linux/sched.h>
d1a797f3	9	#include <asm/processor.h>
95d1b8f9	10	#include <asm/user32.h>
fca460f9	11	#include <asm/unistd.h>
1da177e4	12
e28cbf22 CH	13	#define COMPAT_USER_HZ 100
e28cbf22 CH	14	#define COMPAT_UTS_MACHINE "i686\0\0"
1da177e4 LT	15
	16	typedef u32 compat_size_t;
	17	typedef s32 compat_ssize_t;
	18	typedef s32 compat_time_t;
	19	typedef s32 compat_clock_t;
	20	typedef s32 compat_pid_t;
202e5979 SR	21	typedef u16 __compat_uid_t;
	22	typedef u16 __compat_gid_t;
	23	typedef u32 __compat_uid32_t;
	24	typedef u32 __compat_gid32_t;
1da177e4 LT	25	typedef u16 compat_mode_t;
	26	typedef u32 compat_ino_t;
	27	typedef u16 compat_dev_t;
	28	typedef s32 compat_off_t;
	29	typedef s64 compat_loff_t;
	30	typedef u16 compat_nlink_t;
	31	typedef u16 compat_ipc_pid_t;
	32	typedef s32 compat_daddr_t;
	33	typedef u32 compat_caddr_t;
	34	typedef __kernel_fsid_t compat_fsid_t;
	35	typedef s32 compat_timer_t;
	36	typedef s32 compat_key_t;
	37
	38	typedef s32 compat_int_t;
	39	typedef s32 compat_long_t;
4b777587	40	typedef s64 __attribute__((aligned(4))) compat_s64;
1da177e4 LT	41	typedef u32 compat_uint_t;
1da177e4 LT	42	typedef u32 compat_ulong_t;
4b777587	43	typedef u64 __attribute__((aligned(4))) compat_u64;
751f409d	44	typedef u32 compat_uptr_t;
1da177e4 LT	45
	46	struct compat_timespec {
	47	compat_time_t tv_sec;
	48	s32 tv_nsec;
	49	};
	50
	51	struct compat_timeval {
	52	compat_time_t tv_sec;
	53	s32 tv_usec;
	54	};
	55
	56	struct compat_stat {
	57	compat_dev_t st_dev;
	58	u16 __pad1;
	59	compat_ino_t st_ino;
	60	compat_mode_t st_mode;
	61	compat_nlink_t st_nlink;
202e5979 SR	62	__compat_uid_t st_uid;
202e5979 SR	63	__compat_gid_t st_gid;
1da177e4 LT	64	compat_dev_t st_rdev;
	65	u16 __pad2;
	66	u32 st_size;
	67	u32 st_blksize;
	68	u32 st_blocks;
	69	u32 st_atime;
	70	u32 st_atime_nsec;
	71	u32 st_mtime;
	72	u32 st_mtime_nsec;
	73	u32 st_ctime;
	74	u32 st_ctime_nsec;
	75	u32 __unused4;
	76	u32 __unused5;
	77	};
	78
	79	struct compat_flock {
	80	short l_type;
	81	short l_whence;
	82	compat_off_t l_start;
	83	compat_off_t l_len;
	84	compat_pid_t l_pid;
	85	};
	86
	87	#define F_GETLK64 12 /* using 'struct flock64' */
	88	#define F_SETLK64 13
	89	#define F_SETLKW64 14
	90
	91	/*
	92	* IA32 uses 4 byte alignment for 64 bit quantities,
	93	* so we need to pack this structure.
	94	*/
	95	struct compat_flock64 {
	96	short l_type;
	97	short l_whence;
	98	compat_loff_t l_start;
	99	compat_loff_t l_len;
	100	compat_pid_t l_pid;
	101	} __attribute__((packed));
	102
	103	struct compat_statfs {
	104	int f_type;
	105	int f_bsize;
	106	int f_blocks;
	107	int f_bfree;
	108	int f_bavail;
	109	int f_files;
	110	int f_ffree;
	111	compat_fsid_t f_fsid;
	112	int f_namelen; /* SunOS ignores this field. */
	113	int f_frsize;
1448c721 EB	114	int f_flags;
1448c721 EB	115	int f_spare[4];
1da177e4 LT	116	};
	117
	118	#define COMPAT_RLIM_OLD_INFINITY 0x7fffffff
	119	#define COMPAT_RLIM_INFINITY 0xffffffff
	120
	121	typedef u32 compat_old_sigset_t; /* at least 32 bits */
	122
	123	#define _COMPAT_NSIG 64
	124	#define _COMPAT_NSIG_BPW 32
	125
	126	typedef u32 compat_sigset_word;
	127
751f409d DV	128	typedef union compat_sigval {
	129	compat_int_t sival_int;
	130	compat_uptr_t sival_ptr;
	131	} compat_sigval_t;
	132
	133	typedef struct compat_siginfo {
	134	int si_signo;
	135	int si_errno;
	136	int si_code;
	137
	138	union {
	139	int _pad[128/sizeof(int) - 3];
	140
	141	/* kill() */
	142	struct {
	143	unsigned int _pid; /* sender's pid */
	144	unsigned int _uid; /* sender's uid */
	145	} _kill;
	146
	147	/* POSIX.1b timers */
	148	struct {
	149	compat_timer_t _tid; /* timer id */
	150	int _overrun; /* overrun count */
	151	compat_sigval_t _sigval; /* same as below */
	152	int _sys_private; /* not to be passed to user */
	153	int _overrun_incr; /* amount to add to overrun */
	154	} _timer;
	155
	156	/* POSIX.1b signals */
	157	struct {
	158	unsigned int _pid; /* sender's pid */
	159	unsigned int _uid; /* sender's uid */
	160	compat_sigval_t _sigval;
	161	} _rt;
	162
	163	/* SIGCHLD */
	164	struct {
	165	unsigned int _pid; /* which child */
	166	unsigned int _uid; /* sender's uid */
	167	int _status; /* exit code */
	168	compat_clock_t _utime;
	169	compat_clock_t _stime;
	170	} _sigchld;
	171
	172	/* SIGCHLD (x32 version) */
	173	struct {
	174	unsigned int _pid; /* which child */
	175	unsigned int _uid; /* sender's uid */
	176	int _status; /* exit code */
	177	compat_s64 _utime;
	178	compat_s64 _stime;
	179	} _sigchld_x32;
	180
	181	/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
	182	struct {
	183	unsigned int _addr; /* faulting insn/memory ref. */
	184	} _sigfault;
	185
	186	/* SIGPOLL */
	187	struct {
	188	int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
	189	int _fd;
	190	} _sigpoll;
	191
192	struct {
193	unsigned int _call_addr; /* calling insn */
194	int _syscall; /* triggering system call number */
195	unsigned int _arch; /* AUDIT_ARCH_* of syscall */
196	} _sigsys;
197	} _sifields;
198	} compat_siginfo_t;
199
1da177e4 LT	200	#define COMPAT_OFF_T_MAX 0x7fffffff
	201	#define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL
	202
	203	struct compat_ipc64_perm {
	204	compat_key_t key;
202e5979 SR	205	__compat_uid32_t uid;
	206	__compat_gid32_t gid;
	207	__compat_uid32_t cuid;
	208	__compat_gid32_t cgid;
1da177e4 LT	209	unsigned short mode;
	210	unsigned short __pad1;
	211	unsigned short seq;
	212	unsigned short __pad2;
	213	compat_ulong_t unused1;
	214	compat_ulong_t unused2;
	215	};
	216
	217	struct compat_semid64_ds {
	218	struct compat_ipc64_perm sem_perm;
	219	compat_time_t sem_otime;
	220	compat_ulong_t __unused1;
	221	compat_time_t sem_ctime;
	222	compat_ulong_t __unused2;
	223	compat_ulong_t sem_nsems;
	224	compat_ulong_t __unused3;
	225	compat_ulong_t __unused4;
	226	};
	227
	228	struct compat_msqid64_ds {
	229	struct compat_ipc64_perm msg_perm;
	230	compat_time_t msg_stime;
	231	compat_ulong_t __unused1;
	232	compat_time_t msg_rtime;
	233	compat_ulong_t __unused2;
	234	compat_time_t msg_ctime;
	235	compat_ulong_t __unused3;
	236	compat_ulong_t msg_cbytes;
	237	compat_ulong_t msg_qnum;
	238	compat_ulong_t msg_qbytes;
	239	compat_pid_t msg_lspid;
	240	compat_pid_t msg_lrpid;
	241	compat_ulong_t __unused4;
	242	compat_ulong_t __unused5;
	243	};
	244
	245	struct compat_shmid64_ds {
	246	struct compat_ipc64_perm shm_perm;
	247	compat_size_t shm_segsz;
	248	compat_time_t shm_atime;
	249	compat_ulong_t __unused1;
	250	compat_time_t shm_dtime;
	251	compat_ulong_t __unused2;
	252	compat_time_t shm_ctime;
	253	compat_ulong_t __unused3;
	254	compat_pid_t shm_cpid;
	255	compat_pid_t shm_lpid;
	256	compat_ulong_t shm_nattch;
	257	compat_ulong_t __unused4;
	258	compat_ulong_t __unused5;
	259	};
	260
95d1b8f9 RM	261	/*
	262	* The type of struct elf_prstatus.pr_reg in compatible core dumps.
	263	*/
d1a797f3 PA	264	#ifdef CONFIG_X86_X32_ABI
	265	typedef struct user_regs_struct compat_elf_gregset_t;
	266
	267	#define PR_REG_SIZE(S) (test_thread_flag(TIF_IA32) ? 68 : 216)
	268	#define PRSTATUS_SIZE(S) (test_thread_flag(TIF_IA32) ? 144 : 296)
	269	#define SET_PR_FPVALID(S,V) \
	270	do { (int ) (((void *) &((S)->pr_reg)) + PR_REG_SIZE(0)) = (V); } \
	271	while (0)
	272
	273	#define COMPAT_USE_64BIT_TIME \
	274	(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
	275	#else
95d1b8f9	276	typedef struct user_regs_struct32 compat_elf_gregset_t;
d1a797f3	277	#endif
95d1b8f9	278
1da177e4 LT	279	/*
	280	* A pointer passed in from user mode. This should not
	281	* be used for syscall parameters, just declare them
	282	* as pointers because the syscall entry code will have
8b3de0df	283	* appropriately converted them already.
1da177e4	284	*/
1da177e4 LT	285
	286	static inline void __user *compat_ptr(compat_uptr_t uptr)
	287	{
	288	return (void __user *)(unsigned long)uptr;
	289	}
	290
	291	static inline compat_uptr_t ptr_to_compat(void __user *uptr)
	292	{
	293	return (u32)(unsigned long)uptr;
	294	}
	295
c41d68a5	296	static inline void __user *arch_compat_alloc_user_space(long len)
1da177e4	297	{
d1a797f3 PA	298	compat_uptr_t sp;
	299
	300	if (test_thread_flag(TIF_IA32)) {
	301	sp = task_pt_regs(current)->sp;
	302	} else {
	303	/* -128 for the x32 ABI redzone */
263042e4	304	sp = task_pt_regs(current)->sp - 128;
d1a797f3 PA	305	}
	306
	307	return (void __user *)round_down(sp - len, 16);
1da177e4 LT	308	}
1da177e4 LT	309
abfb9498	310	static inline bool in_x32_syscall(void)
a628b684	311	{
fca460f9 PA	312	#ifdef CONFIG_X86_X32_ABI
	313	if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
	314	return true;
	315	#endif
	316	return false;
bf2fcc6f AK	317	}
bf2fcc6f AK	318
f970165b	319	static inline bool in_compat_syscall(void)
a628b684	320	{
abfb9498	321	return in_ia32_syscall() \|\| in_x32_syscall();
a628b684	322	}
f970165b	323	#define in_compat_syscall in_compat_syscall /* override the generic impl */
a628b684	324
1965aae3	325	#endif /* _ASM_X86_COMPAT_H */