fcntl: don't cap l_start and l_end values for F_GETLK64 in compat syscall
[sfrench/cifs-2.6.git] / arch / mips / include / asm / compat.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_COMPAT_H
3 #define _ASM_COMPAT_H
4 /*
5  * Architecture specific compatibility types
6  */
7 #include <linux/thread_info.h>
8 #include <linux/types.h>
9 #include <asm/page.h>
10 #include <asm/ptrace.h>
11
12 #define COMPAT_USER_HZ          100
13 #define COMPAT_UTS_MACHINE      "mips\0\0\0"
14
15 typedef u32             compat_size_t;
16 typedef s32             compat_ssize_t;
17 typedef s32             compat_time_t;
18 typedef s32             compat_clock_t;
19 typedef s32             compat_suseconds_t;
20
21 typedef s32             compat_pid_t;
22 typedef s32             __compat_uid_t;
23 typedef s32             __compat_gid_t;
24 typedef __compat_uid_t  __compat_uid32_t;
25 typedef __compat_gid_t  __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 u32             compat_nlink_t;
32 typedef s32             compat_ipc_pid_t;
33 typedef s32             compat_daddr_t;
34 typedef s32             compat_caddr_t;
35 typedef struct {
36         s32     val[2];
37 } compat_fsid_t;
38 typedef s32             compat_timer_t;
39 typedef s32             compat_key_t;
40
41 typedef s32             compat_int_t;
42 typedef s32             compat_long_t;
43 typedef s64             compat_s64;
44 typedef u32             compat_uint_t;
45 typedef u32             compat_ulong_t;
46 typedef u64             compat_u64;
47 typedef u32             compat_uptr_t;
48
49 struct compat_timespec {
50         compat_time_t   tv_sec;
51         s32             tv_nsec;
52 };
53
54 struct compat_timeval {
55         compat_time_t   tv_sec;
56         s32             tv_usec;
57 };
58
59 struct compat_stat {
60         compat_dev_t    st_dev;
61         s32             st_pad1[3];
62         compat_ino_t    st_ino;
63         compat_mode_t   st_mode;
64         compat_nlink_t  st_nlink;
65         __compat_uid_t  st_uid;
66         __compat_gid_t  st_gid;
67         compat_dev_t    st_rdev;
68         s32             st_pad2[2];
69         compat_off_t    st_size;
70         s32             st_pad3;
71         compat_time_t   st_atime;
72         s32             st_atime_nsec;
73         compat_time_t   st_mtime;
74         s32             st_mtime_nsec;
75         compat_time_t   st_ctime;
76         s32             st_ctime_nsec;
77         s32             st_blksize;
78         s32             st_blocks;
79         s32             st_pad4[14];
80 };
81
82 struct compat_flock {
83         short           l_type;
84         short           l_whence;
85         compat_off_t    l_start;
86         compat_off_t    l_len;
87         s32             l_sysid;
88         compat_pid_t    l_pid;
89         short           __unused;
90         s32             pad[4];
91 };
92
93 #define F_GETLK64       33
94 #define F_SETLK64       34
95 #define F_SETLKW64      35
96
97 struct compat_flock64 {
98         short           l_type;
99         short           l_whence;
100         compat_loff_t   l_start;
101         compat_loff_t   l_len;
102         compat_pid_t    l_pid;
103 };
104
105 struct compat_statfs {
106         int             f_type;
107         int             f_bsize;
108         int             f_frsize;
109         int             f_blocks;
110         int             f_bfree;
111         int             f_files;
112         int             f_ffree;
113         int             f_bavail;
114         compat_fsid_t   f_fsid;
115         int             f_namelen;
116         int             f_flags;
117         int             f_spare[5];
118 };
119
120 #define COMPAT_RLIM_INFINITY    0x7fffffffUL
121
122 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
123
124 #define _COMPAT_NSIG            128             /* Don't ask !$@#% ...  */
125 #define _COMPAT_NSIG_BPW        32
126
127 typedef u32             compat_sigset_word;
128
129 typedef union compat_sigval {
130         compat_int_t    sival_int;
131         compat_uptr_t   sival_ptr;
132 } compat_sigval_t;
133
134 /* Can't use the generic version because si_code and si_errno are swapped */
135
136 #define SI_PAD_SIZE32   (128/sizeof(int) - 3)
137
138 typedef struct compat_siginfo {
139         int si_signo;
140         int si_code;
141         int si_errno;
142
143         union {
144                 int _pad[128 / sizeof(int) - 3];
145
146                 /* kill() */
147                 struct {
148                         compat_pid_t _pid;      /* sender's pid */
149                         __compat_uid32_t _uid;  /* sender's uid */
150                 } _kill;
151
152                 /* POSIX.1b timers */
153                 struct {
154                         compat_timer_t _tid;    /* timer id */
155                         int _overrun;           /* overrun count */
156                         compat_sigval_t _sigval;        /* same as below */
157                 } _timer;
158
159                 /* POSIX.1b signals */
160                 struct {
161                         compat_pid_t _pid;      /* sender's pid */
162                         __compat_uid32_t _uid;  /* sender's uid */
163                         compat_sigval_t _sigval;
164                 } _rt;
165
166                 /* SIGCHLD */
167                 struct {
168                         compat_pid_t _pid;      /* which child */
169                         __compat_uid32_t _uid;  /* sender's uid */
170                         int _status;            /* exit code */
171                         compat_clock_t _utime;
172                         compat_clock_t _stime;
173                 } _sigchld;
174
175                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
176                 struct {
177                         compat_uptr_t _addr;    /* faulting insn/memory ref. */
178 #ifdef __ARCH_SI_TRAPNO
179                         int _trapno;    /* TRAP # which caused the signal */
180 #endif
181                         short _addr_lsb; /* LSB of the reported address */
182                         struct {
183                                 compat_uptr_t _lower;
184                                 compat_uptr_t _upper;
185                         } _addr_bnd;
186                 } _sigfault;
187
188                 /* SIGPOLL */
189                 struct {
190                         compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
191                         int _fd;
192                 } _sigpoll;
193
194                 struct {
195                         compat_uptr_t _call_addr; /* calling insn */
196                         int _syscall;   /* triggering system call number */
197                         compat_uint_t _arch;    /* AUDIT_ARCH_* of syscall */
198                 } _sigsys;
199         } _sifields;
200 } compat_siginfo_t;
201
202 #define COMPAT_OFF_T_MAX        0x7fffffff
203
204 /*
205  * A pointer passed in from user mode. This should not
206  * be used for syscall parameters, just declare them
207  * as pointers because the syscall entry code will have
208  * appropriately converted them already.
209  */
210
211 static inline void __user *compat_ptr(compat_uptr_t uptr)
212 {
213         /* cast to a __user pointer via "unsigned long" makes sparse happy */
214         return (void __user *)(unsigned long)(long)uptr;
215 }
216
217 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
218 {
219         return (u32)(unsigned long)uptr;
220 }
221
222 static inline void __user *arch_compat_alloc_user_space(long len)
223 {
224         struct pt_regs *regs = (struct pt_regs *)
225                 ((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;
226
227         return (void __user *) (regs->regs[29] - len);
228 }
229
230 struct compat_ipc64_perm {
231         compat_key_t key;
232         __compat_uid32_t uid;
233         __compat_gid32_t gid;
234         __compat_uid32_t cuid;
235         __compat_gid32_t cgid;
236         compat_mode_t mode;
237         unsigned short seq;
238         unsigned short __pad2;
239         compat_ulong_t __unused1;
240         compat_ulong_t __unused2;
241 };
242
243 struct compat_semid64_ds {
244         struct compat_ipc64_perm sem_perm;
245         compat_time_t   sem_otime;
246         compat_time_t   sem_ctime;
247         compat_ulong_t  sem_nsems;
248         compat_ulong_t  __unused1;
249         compat_ulong_t  __unused2;
250 };
251
252 struct compat_msqid64_ds {
253         struct compat_ipc64_perm msg_perm;
254 #ifndef CONFIG_CPU_LITTLE_ENDIAN
255         compat_ulong_t  __unused1;
256 #endif
257         compat_time_t   msg_stime;
258 #ifdef CONFIG_CPU_LITTLE_ENDIAN
259         compat_ulong_t  __unused1;
260 #endif
261 #ifndef CONFIG_CPU_LITTLE_ENDIAN
262         compat_ulong_t  __unused2;
263 #endif
264         compat_time_t   msg_rtime;
265 #ifdef CONFIG_CPU_LITTLE_ENDIAN
266         compat_ulong_t  __unused2;
267 #endif
268 #ifndef CONFIG_CPU_LITTLE_ENDIAN
269         compat_ulong_t  __unused3;
270 #endif
271         compat_time_t   msg_ctime;
272 #ifdef CONFIG_CPU_LITTLE_ENDIAN
273         compat_ulong_t  __unused3;
274 #endif
275         compat_ulong_t  msg_cbytes;
276         compat_ulong_t  msg_qnum;
277         compat_ulong_t  msg_qbytes;
278         compat_pid_t    msg_lspid;
279         compat_pid_t    msg_lrpid;
280         compat_ulong_t  __unused4;
281         compat_ulong_t  __unused5;
282 };
283
284 struct compat_shmid64_ds {
285         struct compat_ipc64_perm shm_perm;
286         compat_size_t   shm_segsz;
287         compat_time_t   shm_atime;
288         compat_time_t   shm_dtime;
289         compat_time_t   shm_ctime;
290         compat_pid_t    shm_cpid;
291         compat_pid_t    shm_lpid;
292         compat_ulong_t  shm_nattch;
293         compat_ulong_t  __unused1;
294         compat_ulong_t  __unused2;
295 };
296
297 /* MIPS has unusual order of fields in stack_t */
298 typedef struct compat_sigaltstack {
299         compat_uptr_t                   ss_sp;
300         compat_size_t                   ss_size;
301         int                             ss_flags;
302 } compat_stack_t;
303 #define compat_sigaltstack compat_sigaltstack
304
305 static inline int is_compat_task(void)
306 {
307         return test_thread_flag(TIF_32BIT_ADDR);
308 }
309
310 #endif /* _ASM_COMPAT_H */