2 * Copyright (C) 2012 ARM Ltd.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 #ifndef __ASM_COMPAT_H
17 #define __ASM_COMPAT_H
22 * Architecture specific compatibility types
24 #include <linux/types.h>
25 #include <linux/sched.h>
26 #include <linux/sched/task_stack.h>
28 #define COMPAT_USER_HZ 100
30 #define COMPAT_UTS_MACHINE "armv8b\0\0"
32 #define COMPAT_UTS_MACHINE "armv8l\0\0"
35 typedef u32 compat_size_t;
36 typedef s32 compat_ssize_t;
37 typedef s32 compat_time_t;
38 typedef s32 compat_clock_t;
39 typedef s32 compat_pid_t;
40 typedef u16 __compat_uid_t;
41 typedef u16 __compat_gid_t;
42 typedef u16 __compat_uid16_t;
43 typedef u16 __compat_gid16_t;
44 typedef u32 __compat_uid32_t;
45 typedef u32 __compat_gid32_t;
46 typedef u16 compat_mode_t;
47 typedef u32 compat_ino_t;
48 typedef u32 compat_dev_t;
49 typedef s32 compat_off_t;
50 typedef s64 compat_loff_t;
51 typedef s32 compat_nlink_t;
52 typedef u16 compat_ipc_pid_t;
53 typedef s32 compat_daddr_t;
54 typedef u32 compat_caddr_t;
55 typedef __kernel_fsid_t compat_fsid_t;
56 typedef s32 compat_key_t;
57 typedef s32 compat_timer_t;
59 typedef s16 compat_short_t;
60 typedef s32 compat_int_t;
61 typedef s32 compat_long_t;
62 typedef s64 compat_s64;
63 typedef u16 compat_ushort_t;
64 typedef u32 compat_uint_t;
65 typedef u32 compat_ulong_t;
66 typedef u64 compat_u64;
67 typedef u32 compat_uptr_t;
69 struct compat_timespec {
74 struct compat_timeval {
87 compat_mode_t st_mode;
88 compat_ushort_t st_nlink;
89 __compat_uid16_t st_uid;
90 __compat_gid16_t st_gid;
98 compat_off_t st_blksize;
99 compat_off_t st_blocks;
100 compat_time_t st_atime;
101 compat_ulong_t st_atime_nsec;
102 compat_time_t st_mtime;
103 compat_ulong_t st_mtime_nsec;
104 compat_time_t st_ctime;
105 compat_ulong_t st_ctime_nsec;
106 compat_ulong_t __unused4[2];
109 struct compat_flock {
112 compat_off_t l_start;
117 #define F_GETLK64 12 /* using 'struct flock64' */
119 #define F_SETLKW64 14
121 struct compat_flock64 {
124 compat_loff_t l_start;
129 struct compat_statfs {
137 compat_fsid_t f_fsid;
138 int f_namelen; /* SunOS ignores this field. */
144 #define COMPAT_RLIM_INFINITY 0xffffffff
146 typedef u32 compat_old_sigset_t;
148 #define _COMPAT_NSIG 64
149 #define _COMPAT_NSIG_BPW 32
151 typedef u32 compat_sigset_word;
153 typedef union compat_sigval {
154 compat_int_t sival_int;
155 compat_uptr_t sival_ptr;
158 typedef struct compat_siginfo {
164 int _pad[128/sizeof(int) - 3];
168 compat_pid_t _pid; /* sender's pid */
169 __compat_uid32_t _uid; /* sender's uid */
172 /* POSIX.1b timers */
174 compat_timer_t _tid; /* timer id */
175 int _overrun; /* overrun count */
176 compat_sigval_t _sigval; /* same as below */
177 int _sys_private; /* not to be passed to user */
180 /* POSIX.1b signals */
182 compat_pid_t _pid; /* sender's pid */
183 __compat_uid32_t _uid; /* sender's uid */
184 compat_sigval_t _sigval;
189 compat_pid_t _pid; /* which child */
190 __compat_uid32_t _uid; /* sender's uid */
191 int _status; /* exit code */
192 compat_clock_t _utime;
193 compat_clock_t _stime;
196 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
198 compat_uptr_t _addr; /* faulting insn/memory ref. */
199 short _addr_lsb; /* LSB of the reported address */
204 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
210 compat_uptr_t _call_addr; /* calling user insn */
211 int _syscall; /* triggering system call number */
212 compat_uint_t _arch; /* AUDIT_ARCH_* of syscall */
217 #define COMPAT_OFF_T_MAX 0x7fffffff
218 #define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL
221 * A pointer passed in from user mode. This should not
222 * be used for syscall parameters, just declare them
223 * as pointers because the syscall entry code will have
224 * appropriately converted them already.
227 static inline void __user *compat_ptr(compat_uptr_t uptr)
229 return (void __user *)(unsigned long)uptr;
232 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
234 return (u32)(unsigned long)uptr;
237 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
239 static inline void __user *arch_compat_alloc_user_space(long len)
241 return (void __user *)compat_user_stack_pointer() - len;
244 struct compat_ipc64_perm {
246 __compat_uid32_t uid;
247 __compat_gid32_t gid;
248 __compat_uid32_t cuid;
249 __compat_gid32_t cgid;
251 unsigned short __pad1;
253 unsigned short __pad2;
254 compat_ulong_t unused1;
255 compat_ulong_t unused2;
258 struct compat_semid64_ds {
259 struct compat_ipc64_perm sem_perm;
260 compat_time_t sem_otime;
261 compat_ulong_t __unused1;
262 compat_time_t sem_ctime;
263 compat_ulong_t __unused2;
264 compat_ulong_t sem_nsems;
265 compat_ulong_t __unused3;
266 compat_ulong_t __unused4;
269 struct compat_msqid64_ds {
270 struct compat_ipc64_perm msg_perm;
271 compat_time_t msg_stime;
272 compat_ulong_t __unused1;
273 compat_time_t msg_rtime;
274 compat_ulong_t __unused2;
275 compat_time_t msg_ctime;
276 compat_ulong_t __unused3;
277 compat_ulong_t msg_cbytes;
278 compat_ulong_t msg_qnum;
279 compat_ulong_t msg_qbytes;
280 compat_pid_t msg_lspid;
281 compat_pid_t msg_lrpid;
282 compat_ulong_t __unused4;
283 compat_ulong_t __unused5;
286 struct compat_shmid64_ds {
287 struct compat_ipc64_perm shm_perm;
288 compat_size_t shm_segsz;
289 compat_time_t shm_atime;
290 compat_ulong_t __unused1;
291 compat_time_t shm_dtime;
292 compat_ulong_t __unused2;
293 compat_time_t shm_ctime;
294 compat_ulong_t __unused3;
295 compat_pid_t shm_cpid;
296 compat_pid_t shm_lpid;
297 compat_ulong_t shm_nattch;
298 compat_ulong_t __unused4;
299 compat_ulong_t __unused5;
302 static inline int is_compat_task(void)
304 return test_thread_flag(TIF_32BIT);
307 static inline int is_compat_thread(struct thread_info *thread)
309 return test_ti_thread_flag(thread, TIF_32BIT);
312 #else /* !CONFIG_COMPAT */
314 static inline int is_compat_thread(struct thread_info *thread)
319 #endif /* CONFIG_COMPAT */
320 #endif /* __KERNEL__ */
321 #endif /* __ASM_COMPAT_H */