xref: /openbmc/linux/arch/mips/include/asm/compat.h (revision b6dcefde)
1 #ifndef _ASM_COMPAT_H
2 #define _ASM_COMPAT_H
3 /*
4  * Architecture specific compatibility types
5  */
6 #include <linux/thread_info.h>
7 #include <linux/types.h>
8 #include <asm/page.h>
9 #include <asm/ptrace.h>
10 
11 #define COMPAT_USER_HZ	100
12 
13 typedef u32		compat_size_t;
14 typedef s32		compat_ssize_t;
15 typedef s32		compat_time_t;
16 typedef s32		compat_clock_t;
17 typedef s32		compat_suseconds_t;
18 
19 typedef s32		compat_pid_t;
20 typedef s32		__compat_uid_t;
21 typedef s32		__compat_gid_t;
22 typedef __compat_uid_t	__compat_uid32_t;
23 typedef __compat_gid_t	__compat_gid32_t;
24 typedef u32		compat_mode_t;
25 typedef u32		compat_ino_t;
26 typedef u32		compat_dev_t;
27 typedef s32		compat_off_t;
28 typedef s64		compat_loff_t;
29 typedef u32		compat_nlink_t;
30 typedef s32		compat_ipc_pid_t;
31 typedef s32		compat_daddr_t;
32 typedef s32		compat_caddr_t;
33 typedef struct {
34 	s32	val[2];
35 } compat_fsid_t;
36 typedef s32		compat_timer_t;
37 typedef s32		compat_key_t;
38 
39 typedef s32		compat_int_t;
40 typedef s32		compat_long_t;
41 typedef s64		compat_s64;
42 typedef u32		compat_uint_t;
43 typedef u32		compat_ulong_t;
44 typedef u64		compat_u64;
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 	s32		st_pad1[3];
59 	compat_ino_t	st_ino;
60 	compat_mode_t	st_mode;
61 	compat_nlink_t	st_nlink;
62 	__compat_uid_t	st_uid;
63 	__compat_gid_t	st_gid;
64 	compat_dev_t	st_rdev;
65 	s32		st_pad2[2];
66 	compat_off_t	st_size;
67 	s32		st_pad3;
68 	compat_time_t	st_atime;
69 	s32		st_atime_nsec;
70 	compat_time_t	st_mtime;
71 	s32		st_mtime_nsec;
72 	compat_time_t	st_ctime;
73 	s32		st_ctime_nsec;
74 	s32		st_blksize;
75 	s32		st_blocks;
76 	s32		st_pad4[14];
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 	s32		l_sysid;
85 	compat_pid_t	l_pid;
86 	short		__unused;
87 	s32		pad[4];
88 };
89 
90 #define F_GETLK64	33
91 #define F_SETLK64	34
92 #define F_SETLKW64	35
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 };
101 
102 struct compat_statfs {
103 	int		f_type;
104 	int		f_bsize;
105 	int		f_frsize;
106 	int		f_blocks;
107 	int		f_bfree;
108 	int		f_files;
109 	int		f_ffree;
110 	int		f_bavail;
111 	compat_fsid_t	f_fsid;
112 	int		f_namelen;
113 	int		f_spare[6];
114 };
115 
116 #define COMPAT_RLIM_INFINITY	0x7fffffffUL
117 
118 typedef u32		compat_old_sigset_t;	/* at least 32 bits */
119 
120 #define _COMPAT_NSIG		128		/* Don't ask !$@#% ...  */
121 #define _COMPAT_NSIG_BPW	32
122 
123 typedef u32		compat_sigset_word;
124 
125 #define COMPAT_OFF_T_MAX	0x7fffffff
126 #define COMPAT_LOFF_T_MAX	0x7fffffffffffffffL
127 
128 /*
129  * A pointer passed in from user mode. This should not
130  * be used for syscall parameters, just declare them
131  * as pointers because the syscall entry code will have
132  * appropriately converted them already.
133  */
134 typedef u32		compat_uptr_t;
135 
136 static inline void __user *compat_ptr(compat_uptr_t uptr)
137 {
138 	/* cast to a __user pointer via "unsigned long" makes sparse happy */
139 	return (void __user *)(unsigned long)(long)uptr;
140 }
141 
142 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
143 {
144 	return (u32)(unsigned long)uptr;
145 }
146 
147 static inline void __user *compat_alloc_user_space(long len)
148 {
149 	struct pt_regs *regs = (struct pt_regs *)
150 		((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;
151 
152 	return (void __user *) (regs->regs[29] - len);
153 }
154 
155 struct compat_ipc64_perm {
156 	compat_key_t key;
157 	__compat_uid32_t uid;
158 	__compat_gid32_t gid;
159 	__compat_uid32_t cuid;
160 	__compat_gid32_t cgid;
161 	compat_mode_t mode;
162 	unsigned short seq;
163 	unsigned short __pad2;
164 	compat_ulong_t __unused1;
165 	compat_ulong_t __unused2;
166 };
167 
168 struct compat_semid64_ds {
169 	struct compat_ipc64_perm sem_perm;
170 	compat_time_t	sem_otime;
171 	compat_time_t	sem_ctime;
172 	compat_ulong_t	sem_nsems;
173 	compat_ulong_t	__unused1;
174 	compat_ulong_t	__unused2;
175 };
176 
177 struct compat_msqid64_ds {
178 	struct compat_ipc64_perm msg_perm;
179 #ifndef CONFIG_CPU_LITTLE_ENDIAN
180 	compat_ulong_t	__unused1;
181 #endif
182 	compat_time_t	msg_stime;
183 #ifdef CONFIG_CPU_LITTLE_ENDIAN
184 	compat_ulong_t	__unused1;
185 #endif
186 #ifndef CONFIG_CPU_LITTLE_ENDIAN
187 	compat_ulong_t	__unused2;
188 #endif
189 	compat_time_t	msg_rtime;
190 #ifdef CONFIG_CPU_LITTLE_ENDIAN
191 	compat_ulong_t	__unused2;
192 #endif
193 #ifndef CONFIG_CPU_LITTLE_ENDIAN
194 	compat_ulong_t	__unused3;
195 #endif
196 	compat_time_t	msg_ctime;
197 #ifdef CONFIG_CPU_LITTLE_ENDIAN
198 	compat_ulong_t	__unused3;
199 #endif
200 	compat_ulong_t	msg_cbytes;
201 	compat_ulong_t	msg_qnum;
202 	compat_ulong_t	msg_qbytes;
203 	compat_pid_t	msg_lspid;
204 	compat_pid_t	msg_lrpid;
205 	compat_ulong_t	__unused4;
206 	compat_ulong_t	__unused5;
207 };
208 
209 struct compat_shmid64_ds {
210 	struct compat_ipc64_perm shm_perm;
211 	compat_size_t	shm_segsz;
212 	compat_time_t	shm_atime;
213 	compat_time_t	shm_dtime;
214 	compat_time_t	shm_ctime;
215 	compat_pid_t	shm_cpid;
216 	compat_pid_t	shm_lpid;
217 	compat_ulong_t	shm_nattch;
218 	compat_ulong_t	__unused1;
219 	compat_ulong_t	__unused2;
220 };
221 
222 static inline int is_compat_task(void)
223 {
224 	return test_thread_flag(TIF_32BIT);
225 }
226 
227 #endif /* _ASM_COMPAT_H */
228