summaryrefslogtreecommitdiff
path: root/arch/arm64/include/asm/compat.h
blob: b0d53a265f1d510cbb6372685b39a53de2361eed (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2012 ARM Ltd.
 */
#ifndef __ASM_COMPAT_H
#define __ASM_COMPAT_H
#ifdef CONFIG_COMPAT

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

#include <asm-generic/compat.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 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_dev_t;
typedef s32		compat_nlink_t;
typedef u16		compat_ipc_pid_t;
typedef u32		compat_caddr_t;
typedef __kernel_fsid_t	compat_fsid_t;
typedef s64		compat_s64;
typedef u64		compat_u64;

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;
	old_time32_t	st_atime;
	compat_ulong_t	st_atime_nsec;
	old_time32_t	st_mtime;
	compat_ulong_t	st_mtime_nsec;
	old_time32_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;

#define COMPAT_OFF_T_MAX	0x7fffffff

/*
 * 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)))
#define COMPAT_MINSIGSTKSZ	2048

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_ulong_t sem_otime;
	compat_ulong_t sem_otime_high;
	compat_ulong_t sem_ctime;
	compat_ulong_t sem_ctime_high;
	compat_ulong_t sem_nsems;
	compat_ulong_t __unused3;
	compat_ulong_t __unused4;
};

struct compat_msqid64_ds {
	struct compat_ipc64_perm msg_perm;
	compat_ulong_t msg_stime;
	compat_ulong_t msg_stime_high;
	compat_ulong_t msg_rtime;
	compat_ulong_t msg_rtime_high;
	compat_ulong_t msg_ctime;
	compat_ulong_t msg_ctime_high;
	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_ulong_t shm_atime;
	compat_ulong_t shm_atime_high;
	compat_ulong_t shm_dtime;
	compat_ulong_t shm_dtime_high;
	compat_ulong_t shm_ctime;
	compat_ulong_t shm_ctime_high;
	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 /* __ASM_COMPAT_H */