xref: /openbmc/linux/arch/powerpc/include/asm/compat.h (revision d7a3d85e)
1 #ifndef _ASM_POWERPC_COMPAT_H
2 #define _ASM_POWERPC_COMPAT_H
3 #ifdef __KERNEL__
4 /*
5  * Architecture specific compatibility types
6  */
7 #include <linux/types.h>
8 #include <linux/sched.h>
9 
10 #define COMPAT_USER_HZ		100
11 #ifdef __BIG_ENDIAN__
12 #define COMPAT_UTS_MACHINE	"ppc\0\0"
13 #else
14 #define COMPAT_UTS_MACHINE	"ppcle\0\0"
15 #endif
16 
17 typedef u32		compat_size_t;
18 typedef s32		compat_ssize_t;
19 typedef s32		compat_time_t;
20 typedef s32		compat_clock_t;
21 typedef s32		compat_pid_t;
22 typedef u32		__compat_uid_t;
23 typedef u32		__compat_gid_t;
24 typedef u32		__compat_uid32_t;
25 typedef u32		__compat_gid32_t;
26 typedef u32		compat_mode_t;
27 typedef u32		compat_ino_t;
28 typedef u32		compat_dev_t;
29 typedef s32		compat_off_t;
30 typedef s64		compat_loff_t;
31 typedef s16		compat_nlink_t;
32 typedef u16		compat_ipc_pid_t;
33 typedef s32		compat_daddr_t;
34 typedef u32		compat_caddr_t;
35 typedef __kernel_fsid_t	compat_fsid_t;
36 typedef s32		compat_key_t;
37 typedef s32		compat_timer_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 typedef u32		compat_uptr_t;
46 
47 struct compat_timespec {
48 	compat_time_t	tv_sec;
49 	s32		tv_nsec;
50 };
51 
52 struct compat_timeval {
53 	compat_time_t	tv_sec;
54 	s32		tv_usec;
55 };
56 
57 struct compat_stat {
58 	compat_dev_t	st_dev;
59 	compat_ino_t	st_ino;
60 	compat_mode_t	st_mode;
61 	compat_nlink_t	st_nlink;
62 	__compat_uid32_t	st_uid;
63 	__compat_gid32_t	st_gid;
64 	compat_dev_t	st_rdev;
65 	compat_off_t	st_size;
66 	compat_off_t	st_blksize;
67 	compat_off_t	st_blocks;
68 	compat_time_t	st_atime;
69 	u32		st_atime_nsec;
70 	compat_time_t	st_mtime;
71 	u32		st_mtime_nsec;
72 	compat_time_t	st_ctime;
73 	u32		st_ctime_nsec;
74 	u32		__unused4[2];
75 };
76 
77 struct compat_flock {
78 	short		l_type;
79 	short		l_whence;
80 	compat_off_t	l_start;
81 	compat_off_t	l_len;
82 	compat_pid_t	l_pid;
83 };
84 
85 #define F_GETLK64	12	/*  using 'struct flock64' */
86 #define F_SETLK64	13
87 #define F_SETLKW64	14
88 
89 struct compat_flock64 {
90 	short		l_type;
91 	short		l_whence;
92 	compat_loff_t	l_start;
93 	compat_loff_t	l_len;
94 	compat_pid_t	l_pid;
95 };
96 
97 struct compat_statfs {
98 	int		f_type;
99 	int		f_bsize;
100 	int		f_blocks;
101 	int		f_bfree;
102 	int		f_bavail;
103 	int		f_files;
104 	int		f_ffree;
105 	compat_fsid_t	f_fsid;
106 	int		f_namelen;	/* SunOS ignores this field. */
107 	int		f_frsize;
108 	int		f_flags;
109 	int		f_spare[4];
110 };
111 
112 #define COMPAT_RLIM_OLD_INFINITY	0x7fffffff
113 #define COMPAT_RLIM_INFINITY		0xffffffff
114 
115 typedef u32		compat_old_sigset_t;
116 
117 #define _COMPAT_NSIG		64
118 #define _COMPAT_NSIG_BPW	32
119 
120 typedef u32		compat_sigset_word;
121 
122 typedef union compat_sigval {
123 	compat_int_t	sival_int;
124 	compat_uptr_t	sival_ptr;
125 } compat_sigval_t;
126 
127 #define SI_PAD_SIZE32	(128/sizeof(int) - 3)
128 
129 typedef struct compat_siginfo {
130 	int si_signo;
131 	int si_errno;
132 	int si_code;
133 
134 	union {
135 		int _pad[SI_PAD_SIZE32];
136 
137 		/* kill() */
138 		struct {
139 			compat_pid_t _pid;		/* sender's pid */
140 			__compat_uid_t _uid;		/* sender's uid */
141 		} _kill;
142 
143 		/* POSIX.1b timers */
144 		struct {
145 			compat_timer_t _tid;		/* timer id */
146 			int _overrun;			/* overrun count */
147 			compat_sigval_t _sigval;	/* same as below */
148 			int _sys_private;	/* not to be passed to user */
149 		} _timer;
150 
151 		/* POSIX.1b signals */
152 		struct {
153 			compat_pid_t _pid;		/* sender's pid */
154 			__compat_uid_t _uid;		/* sender's uid */
155 			compat_sigval_t _sigval;
156 		} _rt;
157 
158 		/* SIGCHLD */
159 		struct {
160 			compat_pid_t _pid;		/* which child */
161 			__compat_uid_t _uid;		/* sender's uid */
162 			int _status;			/* exit code */
163 			compat_clock_t _utime;
164 			compat_clock_t _stime;
165 		} _sigchld;
166 
167 		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGEMT */
168 		struct {
169 			unsigned int _addr; /* faulting insn/memory ref. */
170 		} _sigfault;
171 
172 		/* SIGPOLL */
173 		struct {
174 			int _band;	/* POLL_IN, POLL_OUT, POLL_MSG */
175 			int _fd;
176 		} _sigpoll;
177 	} _sifields;
178 } compat_siginfo_t;
179 
180 #define COMPAT_OFF_T_MAX	0x7fffffff
181 #define COMPAT_LOFF_T_MAX	0x7fffffffffffffffL
182 
183 /*
184  * A pointer passed in from user mode. This should not
185  * be used for syscall parameters, just declare them
186  * as pointers because the syscall entry code will have
187  * appropriately converted them already.
188  */
189 
190 static inline void __user *compat_ptr(compat_uptr_t uptr)
191 {
192 	return (void __user *)(unsigned long)uptr;
193 }
194 
195 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
196 {
197 	return (u32)(unsigned long)uptr;
198 }
199 
200 static inline void __user *arch_compat_alloc_user_space(long len)
201 {
202 	struct pt_regs *regs = current->thread.regs;
203 	unsigned long usp = regs->gpr[1];
204 
205 	/*
206 	 * We can't access below the stack pointer in the 32bit ABI and
207 	 * can access 288 bytes in the 64bit big-endian ABI,
208 	 * or 512 bytes with the new ELFv2 little-endian ABI.
209 	 */
210 	if (!is_32bit_task())
211 		usp -= USER_REDZONE_SIZE;
212 
213 	return (void __user *) (usp - len);
214 }
215 
216 /*
217  * ipc64_perm is actually 32/64bit clean but since the compat layer refers to
218  * it we may as well define it.
219  */
220 struct compat_ipc64_perm {
221 	compat_key_t key;
222 	__compat_uid_t uid;
223 	__compat_gid_t gid;
224 	__compat_uid_t cuid;
225 	__compat_gid_t cgid;
226 	compat_mode_t mode;
227 	unsigned int seq;
228 	unsigned int __pad2;
229 	unsigned long __unused1;	/* yes they really are 64bit pads */
230 	unsigned long __unused2;
231 };
232 
233 struct compat_semid64_ds {
234 	struct compat_ipc64_perm sem_perm;
235 	unsigned int __unused1;
236 	compat_time_t sem_otime;
237 	unsigned int __unused2;
238 	compat_time_t sem_ctime;
239 	compat_ulong_t sem_nsems;
240 	compat_ulong_t __unused3;
241 	compat_ulong_t __unused4;
242 };
243 
244 struct compat_msqid64_ds {
245 	struct compat_ipc64_perm msg_perm;
246 	unsigned int __unused1;
247 	compat_time_t msg_stime;
248 	unsigned int __unused2;
249 	compat_time_t msg_rtime;
250 	unsigned int __unused3;
251 	compat_time_t msg_ctime;
252 	compat_ulong_t msg_cbytes;
253 	compat_ulong_t msg_qnum;
254 	compat_ulong_t msg_qbytes;
255 	compat_pid_t msg_lspid;
256 	compat_pid_t msg_lrpid;
257 	compat_ulong_t __unused4;
258 	compat_ulong_t __unused5;
259 };
260 
261 struct compat_shmid64_ds {
262 	struct compat_ipc64_perm shm_perm;
263 	unsigned int __unused1;
264 	compat_time_t shm_atime;
265 	unsigned int __unused2;
266 	compat_time_t shm_dtime;
267 	unsigned int __unused3;
268 	compat_time_t shm_ctime;
269 	unsigned int __unused4;
270 	compat_size_t shm_segsz;
271 	compat_pid_t shm_cpid;
272 	compat_pid_t shm_lpid;
273 	compat_ulong_t shm_nattch;
274 	compat_ulong_t __unused5;
275 	compat_ulong_t __unused6;
276 };
277 
278 static inline int is_compat_task(void)
279 {
280 	return is_32bit_task();
281 }
282 
283 #endif /* __KERNEL__ */
284 #endif /* _ASM_POWERPC_COMPAT_H */
285