xref: /openbmc/linux/arch/mips/include/asm/compat.h (revision 68198dca)
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 */
311