[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;

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;

#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.
 */
typedef	u32		compat_uptr_t;

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 = percpu_read(old_rsp) - 128;
	}

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

static inline bool is_compat_task(void)
{
#ifdef CONFIG_IA32_EMULATION
	if (current_thread_info()->status & TS_COMPAT)
		return true;
#endif
#ifdef CONFIG_X86_X32_ABI
	if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
		return true;
#endif
	return false;
}

#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;
1da177e4 LT	44
	45	struct compat_timespec {
	46	compat_time_t tv_sec;
	47	s32 tv_nsec;
	48	};
	49
	50	struct compat_timeval {
	51	compat_time_t tv_sec;
	52	s32 tv_usec;
	53	};
	54
	55	struct compat_stat {
	56	compat_dev_t st_dev;
	57	u16 __pad1;
	58	compat_ino_t st_ino;
	59	compat_mode_t st_mode;
	60	compat_nlink_t st_nlink;
202e5979 SR	61	__compat_uid_t st_uid;
202e5979 SR	62	__compat_gid_t st_gid;
1da177e4 LT	63	compat_dev_t st_rdev;
	64	u16 __pad2;
	65	u32 st_size;
	66	u32 st_blksize;
	67	u32 st_blocks;
	68	u32 st_atime;
	69	u32 st_atime_nsec;
	70	u32 st_mtime;
	71	u32 st_mtime_nsec;
	72	u32 st_ctime;
	73	u32 st_ctime_nsec;
	74	u32 __unused4;
	75	u32 __unused5;
	76	};
	77
	78	struct compat_flock {
	79	short l_type;
	80	short l_whence;
	81	compat_off_t l_start;
	82	compat_off_t l_len;
	83	compat_pid_t l_pid;
	84	};
	85
	86	#define F_GETLK64 12 /* using 'struct flock64' */
	87	#define F_SETLK64 13
	88	#define F_SETLKW64 14
	89
	90	/*
	91	* IA32 uses 4 byte alignment for 64 bit quantities,
	92	* so we need to pack this structure.
	93	*/
	94	struct compat_flock64 {
	95	short l_type;
	96	short l_whence;
	97	compat_loff_t l_start;
	98	compat_loff_t l_len;
	99	compat_pid_t l_pid;
	100	} __attribute__((packed));
	101
	102	struct compat_statfs {
	103	int f_type;
	104	int f_bsize;
	105	int f_blocks;
	106	int f_bfree;
	107	int f_bavail;
	108	int f_files;
	109	int f_ffree;
	110	compat_fsid_t f_fsid;
	111	int f_namelen; /* SunOS ignores this field. */
	112	int f_frsize;
1448c721 EB	113	int f_flags;
1448c721 EB	114	int f_spare[4];
1da177e4 LT	115	};
	116
	117	#define COMPAT_RLIM_OLD_INFINITY 0x7fffffff
	118	#define COMPAT_RLIM_INFINITY 0xffffffff
	119
	120	typedef u32 compat_old_sigset_t; /* at least 32 bits */
	121
	122	#define _COMPAT_NSIG 64
	123	#define _COMPAT_NSIG_BPW 32
	124
	125	typedef u32 compat_sigset_word;
	126
	127	#define COMPAT_OFF_T_MAX 0x7fffffff
	128	#define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL
	129
	130	struct compat_ipc64_perm {
	131	compat_key_t key;
202e5979 SR	132	__compat_uid32_t uid;
	133	__compat_gid32_t gid;
	134	__compat_uid32_t cuid;
	135	__compat_gid32_t cgid;
1da177e4 LT	136	unsigned short mode;
	137	unsigned short __pad1;
	138	unsigned short seq;
	139	unsigned short __pad2;
	140	compat_ulong_t unused1;
	141	compat_ulong_t unused2;
	142	};
	143
	144	struct compat_semid64_ds {
	145	struct compat_ipc64_perm sem_perm;
	146	compat_time_t sem_otime;
	147	compat_ulong_t __unused1;
	148	compat_time_t sem_ctime;
	149	compat_ulong_t __unused2;
	150	compat_ulong_t sem_nsems;
	151	compat_ulong_t __unused3;
	152	compat_ulong_t __unused4;
	153	};
	154
	155	struct compat_msqid64_ds {
	156	struct compat_ipc64_perm msg_perm;
	157	compat_time_t msg_stime;
	158	compat_ulong_t __unused1;
	159	compat_time_t msg_rtime;
	160	compat_ulong_t __unused2;
	161	compat_time_t msg_ctime;
	162	compat_ulong_t __unused3;
	163	compat_ulong_t msg_cbytes;
	164	compat_ulong_t msg_qnum;
	165	compat_ulong_t msg_qbytes;
	166	compat_pid_t msg_lspid;
	167	compat_pid_t msg_lrpid;
	168	compat_ulong_t __unused4;
	169	compat_ulong_t __unused5;
	170	};
	171
	172	struct compat_shmid64_ds {
	173	struct compat_ipc64_perm shm_perm;
	174	compat_size_t shm_segsz;
	175	compat_time_t shm_atime;
	176	compat_ulong_t __unused1;
	177	compat_time_t shm_dtime;
	178	compat_ulong_t __unused2;
	179	compat_time_t shm_ctime;
	180	compat_ulong_t __unused3;
	181	compat_pid_t shm_cpid;
	182	compat_pid_t shm_lpid;
	183	compat_ulong_t shm_nattch;
	184	compat_ulong_t __unused4;
	185	compat_ulong_t __unused5;
	186	};
	187
95d1b8f9 RM	188	/*
	189	* The type of struct elf_prstatus.pr_reg in compatible core dumps.
	190	*/
d1a797f3 PA	191	#ifdef CONFIG_X86_X32_ABI
	192	typedef struct user_regs_struct compat_elf_gregset_t;
	193
	194	#define PR_REG_SIZE(S) (test_thread_flag(TIF_IA32) ? 68 : 216)
	195	#define PRSTATUS_SIZE(S) (test_thread_flag(TIF_IA32) ? 144 : 296)
	196	#define SET_PR_FPVALID(S,V) \
	197	do { (int ) (((void *) &((S)->pr_reg)) + PR_REG_SIZE(0)) = (V); } \
	198	while (0)
	199
	200	#define COMPAT_USE_64BIT_TIME \
	201	(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
	202	#else
95d1b8f9	203	typedef struct user_regs_struct32 compat_elf_gregset_t;
d1a797f3	204	#endif
95d1b8f9	205
1da177e4 LT	206	/*
	207	* A pointer passed in from user mode. This should not
	208	* be used for syscall parameters, just declare them
	209	* as pointers because the syscall entry code will have
8b3de0df	210	* appropriately converted them already.
1da177e4 LT	211	*/
	212	typedef u32 compat_uptr_t;
	213
	214	static inline void __user *compat_ptr(compat_uptr_t uptr)
	215	{
	216	return (void __user *)(unsigned long)uptr;
	217	}
	218
	219	static inline compat_uptr_t ptr_to_compat(void __user *uptr)
	220	{
	221	return (u32)(unsigned long)uptr;
	222	}
	223
c41d68a5	224	static inline void __user *arch_compat_alloc_user_space(long len)
1da177e4	225	{
d1a797f3 PA	226	compat_uptr_t sp;
	227
	228	if (test_thread_flag(TIF_IA32)) {
	229	sp = task_pt_regs(current)->sp;
	230	} else {
	231	/* -128 for the x32 ABI redzone */
	232	sp = percpu_read(old_rsp) - 128;
	233	}
	234
	235	return (void __user *)round_down(sp - len, 16);
1da177e4 LT	236	}
1da177e4 LT	237
fca460f9	238	static inline bool is_compat_task(void)
bf2fcc6f	239	{
fca460f9 PA	240	#ifdef CONFIG_IA32_EMULATION
	241	if (current_thread_info()->status & TS_COMPAT)
	242	return true;
	243	#endif
	244	#ifdef CONFIG_X86_X32_ABI
	245	if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
	246	return true;
	247	#endif
	248	return false;
bf2fcc6f AK	249	}
bf2fcc6f AK	250
1965aae3	251	#endif /* _ASM_X86_COMPAT_H */