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#define COMPAT_UTS_MACHINE	"mips\0\0\0"
13
14typedef u32		compat_size_t;
15typedef s32		compat_ssize_t;
16typedef s32		compat_time_t;
17typedef s32		compat_clock_t;
18typedef s32		compat_suseconds_t;
19
20typedef s32		compat_pid_t;
21typedef s32		__compat_uid_t;
22typedef s32		__compat_gid_t;
23typedef __compat_uid_t	__compat_uid32_t;
24typedef __compat_gid_t	__compat_gid32_t;
25typedef u32		compat_mode_t;
26typedef u32		compat_ino_t;
27typedef u32		compat_dev_t;
28typedef s32		compat_off_t;
29typedef s64		compat_loff_t;
30typedef u32		compat_nlink_t;
31typedef s32		compat_ipc_pid_t;
32typedef s32		compat_daddr_t;
33typedef s32		compat_caddr_t;
34typedef struct {
35	s32	val[2];
36} compat_fsid_t;
37typedef s32		compat_timer_t;
38typedef s32		compat_key_t;
39
40typedef s32		compat_int_t;
41typedef s32		compat_long_t;
42typedef s64		compat_s64;
43typedef u32		compat_uint_t;
44typedef u32		compat_ulong_t;
45typedef u64		compat_u64;
46typedef u32		compat_uptr_t;
47
48struct compat_timespec {
49	compat_time_t	tv_sec;
50	s32		tv_nsec;
51};
52
53struct compat_timeval {
54	compat_time_t	tv_sec;
55	s32		tv_usec;
56};
57
58struct compat_stat {
59	compat_dev_t	st_dev;
60	s32		st_pad1[3];
61	compat_ino_t	st_ino;
62	compat_mode_t	st_mode;
63	compat_nlink_t	st_nlink;
64	__compat_uid_t	st_uid;
65	__compat_gid_t	st_gid;
66	compat_dev_t	st_rdev;
67	s32		st_pad2[2];
68	compat_off_t	st_size;
69	s32		st_pad3;
70	compat_time_t	st_atime;
71	s32		st_atime_nsec;
72	compat_time_t	st_mtime;
73	s32		st_mtime_nsec;
74	compat_time_t	st_ctime;
75	s32		st_ctime_nsec;
76	s32		st_blksize;
77	s32		st_blocks;
78	s32		st_pad4[14];
79};
80
81struct compat_flock {
82	short		l_type;
83	short		l_whence;
84	compat_off_t	l_start;
85	compat_off_t	l_len;
86	s32		l_sysid;
87	compat_pid_t	l_pid;
88	short		__unused;
89	s32		pad[4];
90};
91
92#define F_GETLK64	33
93#define F_SETLK64	34
94#define F_SETLKW64	35
95
96struct compat_flock64 {
97	short		l_type;
98	short		l_whence;
99	compat_loff_t	l_start;
100	compat_loff_t	l_len;
101	compat_pid_t	l_pid;
102};
103
104struct compat_statfs {
105	int		f_type;
106	int		f_bsize;
107	int		f_frsize;
108	int		f_blocks;
109	int		f_bfree;
110	int		f_files;
111	int		f_ffree;
112	int		f_bavail;
113	compat_fsid_t	f_fsid;
114	int		f_namelen;
115	int		f_flags;
116	int		f_spare[5];
117};
118
119#define COMPAT_RLIM_INFINITY	0x7fffffffUL
120
121typedef u32		compat_old_sigset_t;	/* at least 32 bits */
122
123#define _COMPAT_NSIG		128		/* Don't ask !$@#% ...	*/
124#define _COMPAT_NSIG_BPW	32
125
126typedef u32		compat_sigset_word;
127
128typedef union compat_sigval {
129	compat_int_t	sival_int;
130	compat_uptr_t	sival_ptr;
131} compat_sigval_t;
132
133#define SI_PAD_SIZE32	(128/sizeof(int) - 3)
134
135typedef struct compat_siginfo {
136	int si_signo;
137	int si_code;
138	int si_errno;
139
140	union {
141		int _pad[SI_PAD_SIZE32];
142
143		/* kill() */
144		struct {
145			compat_pid_t _pid;	/* sender's pid */
146			__compat_uid_t _uid;	/* sender's uid */
147		} _kill;
148
149		/* SIGCHLD */
150		struct {
151			compat_pid_t _pid;	/* which child */
152			__compat_uid_t _uid;	/* sender's uid */
153			int _status;		/* exit code */
154			compat_clock_t _utime;
155			compat_clock_t _stime;
156		} _sigchld;
157
158		/* IRIX SIGCHLD */
159		struct {
160			compat_pid_t _pid;	/* which child */
161			compat_clock_t _utime;
162			int _status;		/* exit code */
163			compat_clock_t _stime;
164		} _irix_sigchld;
165
166		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
167		struct {
168			s32 _addr; /* faulting insn/memory ref. */
169		} _sigfault;
170
171		/* SIGPOLL, SIGXFSZ (To do ...)	 */
172		struct {
173			int _band;	/* POLL_IN, POLL_OUT, POLL_MSG */
174			int _fd;
175		} _sigpoll;
176
177		/* POSIX.1b timers */
178		struct {
179			timer_t _tid;		/* timer id */
180			int _overrun;		/* overrun count */
181			compat_sigval_t _sigval;/* same as below */
182			int _sys_private;	/* not to be passed to user */
183		} _timer;
184
185		/* POSIX.1b signals */
186		struct {
187			compat_pid_t _pid;	/* sender's pid */
188			__compat_uid_t _uid;	/* sender's uid */
189			compat_sigval_t _sigval;
190		} _rt;
191
192	} _sifields;
193} compat_siginfo_t;
194
195#define COMPAT_OFF_T_MAX	0x7fffffff
196#define COMPAT_LOFF_T_MAX	0x7fffffffffffffffL
197
198/*
199 * A pointer passed in from user mode. This should not
200 * be used for syscall parameters, just declare them
201 * as pointers because the syscall entry code will have
202 * appropriately converted them already.
203 */
204
205static inline void __user *compat_ptr(compat_uptr_t uptr)
206{
207	/* cast to a __user pointer via "unsigned long" makes sparse happy */
208	return (void __user *)(unsigned long)(long)uptr;
209}
210
211static inline compat_uptr_t ptr_to_compat(void __user *uptr)
212{
213	return (u32)(unsigned long)uptr;
214}
215
216static inline void __user *arch_compat_alloc_user_space(long len)
217{
218	struct pt_regs *regs = (struct pt_regs *)
219		((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;
220
221	return (void __user *) (regs->regs[29] - len);
222}
223
224struct compat_ipc64_perm {
225	compat_key_t key;
226	__compat_uid32_t uid;
227	__compat_gid32_t gid;
228	__compat_uid32_t cuid;
229	__compat_gid32_t cgid;
230	compat_mode_t mode;
231	unsigned short seq;
232	unsigned short __pad2;
233	compat_ulong_t __unused1;
234	compat_ulong_t __unused2;
235};
236
237struct compat_semid64_ds {
238	struct compat_ipc64_perm sem_perm;
239	compat_time_t	sem_otime;
240	compat_time_t	sem_ctime;
241	compat_ulong_t	sem_nsems;
242	compat_ulong_t	__unused1;
243	compat_ulong_t	__unused2;
244};
245
246struct compat_msqid64_ds {
247	struct compat_ipc64_perm msg_perm;
248#ifndef CONFIG_CPU_LITTLE_ENDIAN
249	compat_ulong_t	__unused1;
250#endif
251	compat_time_t	msg_stime;
252#ifdef CONFIG_CPU_LITTLE_ENDIAN
253	compat_ulong_t	__unused1;
254#endif
255#ifndef CONFIG_CPU_LITTLE_ENDIAN
256	compat_ulong_t	__unused2;
257#endif
258	compat_time_t	msg_rtime;
259#ifdef CONFIG_CPU_LITTLE_ENDIAN
260	compat_ulong_t	__unused2;
261#endif
262#ifndef CONFIG_CPU_LITTLE_ENDIAN
263	compat_ulong_t	__unused3;
264#endif
265	compat_time_t	msg_ctime;
266#ifdef CONFIG_CPU_LITTLE_ENDIAN
267	compat_ulong_t	__unused3;
268#endif
269	compat_ulong_t	msg_cbytes;
270	compat_ulong_t	msg_qnum;
271	compat_ulong_t	msg_qbytes;
272	compat_pid_t	msg_lspid;
273	compat_pid_t	msg_lrpid;
274	compat_ulong_t	__unused4;
275	compat_ulong_t	__unused5;
276};
277
278struct compat_shmid64_ds {
279	struct compat_ipc64_perm shm_perm;
280	compat_size_t	shm_segsz;
281	compat_time_t	shm_atime;
282	compat_time_t	shm_dtime;
283	compat_time_t	shm_ctime;
284	compat_pid_t	shm_cpid;
285	compat_pid_t	shm_lpid;
286	compat_ulong_t	shm_nattch;
287	compat_ulong_t	__unused1;
288	compat_ulong_t	__unused2;
289};
290
291/* MIPS has unusual order of fields in stack_t */
292typedef struct compat_sigaltstack {
293	compat_uptr_t			ss_sp;
294	compat_size_t			ss_size;
295	int				ss_flags;
296} compat_stack_t;
297#define compat_sigaltstack compat_sigaltstack
298
299static inline int is_compat_task(void)
300{
301	return test_thread_flag(TIF_32BIT_ADDR);
302}
303
304#endif /* _ASM_COMPAT_H */
305