[mirror_ubuntu-artful-kernel.git] / arch / arm64 / include / asm / compat.h

/*
 * Copyright (C) 2012 ARM Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __ASM_COMPAT_H
#define __ASM_COMPAT_H
#ifdef __KERNEL__
#ifdef CONFIG_COMPAT

/*
 * Architecture specific compatibility types
 */
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/sched/task_stack.h>

#define COMPAT_USER_HZ		100
#ifdef __AARCH64EB__
#define COMPAT_UTS_MACHINE	"armv8b\0\0"
#else
#define COMPAT_UTS_MACHINE	"armv8l\0\0"
#endif

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 u16		__compat_uid16_t;
typedef u16		__compat_gid16_t;
typedef u32		__compat_uid32_t;
typedef u32		__compat_gid32_t;
typedef u16		compat_mode_t;
typedef u32		compat_ino_t;
typedef u32		compat_dev_t;
typedef s32		compat_off_t;
typedef s64		compat_loff_t;
typedef s32		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_key_t;
typedef s32		compat_timer_t;

typedef s16		compat_short_t;
typedef s32		compat_int_t;
typedef s32		compat_long_t;
typedef s64		compat_s64;
typedef u16		compat_ushort_t;
typedef u32		compat_uint_t;
typedef u32		compat_ulong_t;
typedef u64		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 {
#ifdef __AARCH64EB__
	short		st_dev;
	short		__pad1;
#else
	compat_dev_t	st_dev;
#endif
	compat_ino_t	st_ino;
	compat_mode_t	st_mode;
	compat_ushort_t	st_nlink;
	__compat_uid16_t	st_uid;
	__compat_gid16_t	st_gid;
#ifdef __AARCH64EB__
	short		st_rdev;
	short		__pad2;
#else
	compat_dev_t	st_rdev;
#endif
	compat_off_t	st_size;
	compat_off_t	st_blksize;
	compat_off_t	st_blocks;
	compat_time_t	st_atime;
	compat_ulong_t	st_atime_nsec;
	compat_time_t	st_mtime;
	compat_ulong_t	st_mtime_nsec;
	compat_time_t	st_ctime;
	compat_ulong_t	st_ctime_nsec;
	compat_ulong_t	__unused4[2];
};

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

struct compat_flock64 {
	short		l_type;
	short		l_whence;
	compat_loff_t	l_start;
	compat_loff_t	l_len;
	compat_pid_t	l_pid;
};

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_INFINITY		0xffffffff

typedef u32		compat_old_sigset_t;

#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 {
			compat_pid_t _pid;	/* sender's pid */
			__compat_uid32_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 {
			compat_pid_t _pid;	/* sender's pid */
			__compat_uid32_t _uid;	/* sender's uid */
			compat_sigval_t _sigval;
		} _rt;

		/* SIGCHLD */
		struct {
			compat_pid_t _pid;	/* which child */
			__compat_uid32_t _uid;	/* sender's uid */
			int _status;		/* exit code */
			compat_clock_t _utime;
			compat_clock_t _stime;
		} _sigchld;

		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
		struct {
			compat_uptr_t _addr; /* faulting insn/memory ref. */
			short _addr_lsb; /* LSB of the reported address */
		} _sigfault;

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

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

#define COMPAT_OFF_T_MAX	0x7fffffff
#define COMPAT_LOFF_T_MAX	0x7fffffffffffffffL

/*
 * 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;
}

#define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))

static inline void __user *arch_compat_alloc_user_space(long len)
{
	return (void __user *)compat_user_stack_pointer() - len;
}

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;
};

static inline int is_compat_task(void)
{
	return test_thread_flag(TIF_32BIT);
}

static inline int is_compat_thread(struct thread_info *thread)
{
	return test_ti_thread_flag(thread, TIF_32BIT);
}

#else /* !CONFIG_COMPAT */

static inline int is_compat_thread(struct thread_info *thread)
{
	return 0;
}

#endif /* CONFIG_COMPAT */
#endif /* __KERNEL__ */
#endif /* __ASM_COMPAT_H */
Commit	Line	Data
3dd681d9 WD	1	/*
	2	* Copyright (C) 2012 ARM Ltd.
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	15	*/
	16	#ifndef __ASM_COMPAT_H
	17	#define __ASM_COMPAT_H
	18	#ifdef __KERNEL__
	19	#ifdef CONFIG_COMPAT
	20
	21	/*
	22	* Architecture specific compatibility types
	23	*/
	24	#include <linux/types.h>
	25	#include <linux/sched.h>
68db0cf1	26	#include <linux/sched/task_stack.h>
3dd681d9 WD	27
3dd681d9 WD	28	#define COMPAT_USER_HZ 100
a795a38e WD	29	#ifdef __AARCH64EB__
	30	#define COMPAT_UTS_MACHINE "armv8b\0\0"
	31	#else
3dd681d9	32	#define COMPAT_UTS_MACHINE "armv8l\0\0"
a795a38e	33	#endif
3dd681d9 WD	34
	35	typedef u32 compat_size_t;
	36	typedef s32 compat_ssize_t;
	37	typedef s32 compat_time_t;
	38	typedef s32 compat_clock_t;
	39	typedef s32 compat_pid_t;
971a5b6f VK	40	typedef u16 __compat_uid_t;
971a5b6f VK	41	typedef u16 __compat_gid_t;
f15a2a12 CM	42	typedef u16 __compat_uid16_t;
f15a2a12 CM	43	typedef u16 __compat_gid16_t;
3dd681d9 WD	44	typedef u32 __compat_uid32_t;
3dd681d9 WD	45	typedef u32 __compat_gid32_t;
f15a2a12	46	typedef u16 compat_mode_t;
3dd681d9 WD	47	typedef u32 compat_ino_t;
	48	typedef u32 compat_dev_t;
	49	typedef s32 compat_off_t;
	50	typedef s64 compat_loff_t;
f15a2a12	51	typedef s32 compat_nlink_t;
3dd681d9 WD	52	typedef u16 compat_ipc_pid_t;
	53	typedef s32 compat_daddr_t;
	54	typedef u32 compat_caddr_t;
	55	typedef __kernel_fsid_t compat_fsid_t;
	56	typedef s32 compat_key_t;
	57	typedef s32 compat_timer_t;
	58
f15a2a12	59	typedef s16 compat_short_t;
3dd681d9 WD	60	typedef s32 compat_int_t;
	61	typedef s32 compat_long_t;
	62	typedef s64 compat_s64;
f15a2a12	63	typedef u16 compat_ushort_t;
3dd681d9 WD	64	typedef u32 compat_uint_t;
	65	typedef u32 compat_ulong_t;
	66	typedef u64 compat_u64;
751f409d	67	typedef u32 compat_uptr_t;
3dd681d9 WD	68
	69	struct compat_timespec {
	70	compat_time_t tv_sec;
	71	s32 tv_nsec;
	72	};
	73
	74	struct compat_timeval {
	75	compat_time_t tv_sec;
	76	s32 tv_usec;
	77	};
	78
	79	struct compat_stat {
a795a38e WD	80	#ifdef __AARCH64EB__
	81	short st_dev;
	82	short __pad1;
	83	#else
3dd681d9	84	compat_dev_t st_dev;
a795a38e	85	#endif
3dd681d9 WD	86	compat_ino_t st_ino;
3dd681d9 WD	87	compat_mode_t st_mode;
f15a2a12 CM	88	compat_ushort_t st_nlink;
	89	__compat_uid16_t st_uid;
	90	__compat_gid16_t st_gid;
a795a38e WD	91	#ifdef __AARCH64EB__
	92	short st_rdev;
	93	short __pad2;
	94	#else
3dd681d9	95	compat_dev_t st_rdev;
a795a38e	96	#endif
3dd681d9 WD	97	compat_off_t st_size;
	98	compat_off_t st_blksize;
	99	compat_off_t st_blocks;
	100	compat_time_t st_atime;
f15a2a12	101	compat_ulong_t st_atime_nsec;
3dd681d9	102	compat_time_t st_mtime;
f15a2a12	103	compat_ulong_t st_mtime_nsec;
3dd681d9	104	compat_time_t st_ctime;
f15a2a12 CM	105	compat_ulong_t st_ctime_nsec;
f15a2a12 CM	106	compat_ulong_t __unused4[2];
3dd681d9 WD	107	};
	108
	109	struct compat_flock {
	110	short l_type;
	111	short l_whence;
	112	compat_off_t l_start;
	113	compat_off_t l_len;
	114	compat_pid_t l_pid;
	115	};
	116
	117	#define F_GETLK64 12 /* using 'struct flock64' */
	118	#define F_SETLK64 13
	119	#define F_SETLKW64 14
	120
	121	struct compat_flock64 {
	122	short l_type;
	123	short l_whence;
	124	compat_loff_t l_start;
	125	compat_loff_t l_len;
	126	compat_pid_t l_pid;
	127	};
	128
	129	struct compat_statfs {
	130	int f_type;
	131	int f_bsize;
	132	int f_blocks;
	133	int f_bfree;
	134	int f_bavail;
	135	int f_files;
	136	int f_ffree;
	137	compat_fsid_t f_fsid;
	138	int f_namelen; /* SunOS ignores this field. */
	139	int f_frsize;
	140	int f_flags;
	141	int f_spare[4];
	142	};
	143
	144	#define COMPAT_RLIM_INFINITY 0xffffffff
	145
	146	typedef u32 compat_old_sigset_t;
	147
	148	#define _COMPAT_NSIG 64
	149	#define _COMPAT_NSIG_BPW 32
	150
	151	typedef u32 compat_sigset_word;
	152
751f409d DV	153	typedef union compat_sigval {
	154	compat_int_t sival_int;
	155	compat_uptr_t sival_ptr;
	156	} compat_sigval_t;
	157
	158	typedef struct compat_siginfo {
	159	int si_signo;
	160	int si_errno;
	161	int si_code;
	162
	163	union {
751f409d DV	164	int _pad[128/sizeof(int) - 3];
	165
	166	/* kill() */
	167	struct {
	168	compat_pid_t _pid; /* sender's pid */
	169	__compat_uid32_t _uid; /* sender's uid */
	170	} _kill;
	171
	172	/* POSIX.1b timers */
	173	struct {
	174	compat_timer_t _tid; /* timer id */
	175	int _overrun; /* overrun count */
	176	compat_sigval_t _sigval; /* same as below */
	177	int _sys_private; /* not to be passed to user */
	178	} _timer;
	179
	180	/* POSIX.1b signals */
	181	struct {
	182	compat_pid_t _pid; /* sender's pid */
	183	__compat_uid32_t _uid; /* sender's uid */
	184	compat_sigval_t _sigval;
	185	} _rt;
	186
	187	/* SIGCHLD */
	188	struct {
	189	compat_pid_t _pid; /* which child */
	190	__compat_uid32_t _uid; /* sender's uid */
	191	int _status; /* exit code */
	192	compat_clock_t _utime;
	193	compat_clock_t _stime;
	194	} _sigchld;
	195
	196	/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
	197	struct {
	198	compat_uptr_t _addr; /* faulting insn/memory ref. */
	199	short _addr_lsb; /* LSB of the reported address */
	200	} _sigfault;
	201
	202	/* SIGPOLL */
	203	struct {
	204	compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
	205	int _fd;
	206	} _sigpoll;
cc5e9097 AT	207
	208	/* SIGSYS */
	209	struct {
	210	compat_uptr_t _call_addr; /* calling user insn */
	211	int _syscall; /* triggering system call number */
	212	compat_uint_t _arch; /* AUDIT_ARCH_* of syscall */
	213	} _sigsys;
751f409d DV	214	} _sifields;
	215	} compat_siginfo_t;
	216
3dd681d9 WD	217	#define COMPAT_OFF_T_MAX 0x7fffffff
	218	#define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL
	219
	220	/*
	221	* A pointer passed in from user mode. This should not
	222	* be used for syscall parameters, just declare them
	223	* as pointers because the syscall entry code will have
	224	* appropriately converted them already.
	225	*/
3dd681d9 WD	226
	227	static inline void __user *compat_ptr(compat_uptr_t uptr)
	228	{
	229	return (void __user *)(unsigned long)uptr;
	230	}
	231
	232	static inline compat_uptr_t ptr_to_compat(void __user *uptr)
	233	{
	234	return (u32)(unsigned long)uptr;
	235	}
	236
adc235af	237	#define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
9b064fc3	238
3dd681d9 WD	239	static inline void __user *arch_compat_alloc_user_space(long len)
3dd681d9 WD	240	{
9b064fc3	241	return (void __user *)compat_user_stack_pointer() - len;
3dd681d9 WD	242	}
	243
	244	struct compat_ipc64_perm {
	245	compat_key_t key;
	246	__compat_uid32_t uid;
	247	__compat_gid32_t gid;
	248	__compat_uid32_t cuid;
	249	__compat_gid32_t cgid;
	250	unsigned short mode;
	251	unsigned short __pad1;
	252	unsigned short seq;
	253	unsigned short __pad2;
	254	compat_ulong_t unused1;
	255	compat_ulong_t unused2;
	256	};
	257
	258	struct compat_semid64_ds {
	259	struct compat_ipc64_perm sem_perm;
	260	compat_time_t sem_otime;
	261	compat_ulong_t __unused1;
	262	compat_time_t sem_ctime;
	263	compat_ulong_t __unused2;
	264	compat_ulong_t sem_nsems;
	265	compat_ulong_t __unused3;
	266	compat_ulong_t __unused4;
	267	};
	268
	269	struct compat_msqid64_ds {
	270	struct compat_ipc64_perm msg_perm;
	271	compat_time_t msg_stime;
	272	compat_ulong_t __unused1;
	273	compat_time_t msg_rtime;
	274	compat_ulong_t __unused2;
	275	compat_time_t msg_ctime;
	276	compat_ulong_t __unused3;
	277	compat_ulong_t msg_cbytes;
	278	compat_ulong_t msg_qnum;
	279	compat_ulong_t msg_qbytes;
	280	compat_pid_t msg_lspid;
	281	compat_pid_t msg_lrpid;
	282	compat_ulong_t __unused4;
	283	compat_ulong_t __unused5;
	284	};
	285
	286	struct compat_shmid64_ds {
	287	struct compat_ipc64_perm shm_perm;
	288	compat_size_t shm_segsz;
	289	compat_time_t shm_atime;
	290	compat_ulong_t __unused1;
	291	compat_time_t shm_dtime;
	292	compat_ulong_t __unused2;
	293	compat_time_t shm_ctime;
	294	compat_ulong_t __unused3;
	295	compat_pid_t shm_cpid;
	296	compat_pid_t shm_lpid;
	297	compat_ulong_t shm_nattch;
	298	compat_ulong_t __unused4;
	299	compat_ulong_t __unused5;
	300	};
	301
	302	static inline int is_compat_task(void)
	303	{
	304	return test_thread_flag(TIF_32BIT);
	305	}
306
307	static inline int is_compat_thread(struct thread_info *thread)
308	{
309	return test_ti_thread_flag(thread, TIF_32BIT);
310	}
311
312	#else /* !CONFIG_COMPAT */
313
3dd681d9 WD	314	static inline int is_compat_thread(struct thread_info *thread)
	315	{
	316	return 0;
	317	}
	318
	319	#endif /* CONFIG_COMPAT */
	320	#endif /* __KERNEL__ */
	321	#endif /* __ASM_COMPAT_H */