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 #include <asm-generic/compat.h>
30 #define COMPAT_USER_HZ 100
32 #define COMPAT_UTS_MACHINE "armv8b\0\0"
34 #define COMPAT_UTS_MACHINE "armv8l\0\0"
37 typedef u16 __compat_uid_t;
38 typedef u16 __compat_gid_t;
39 typedef u16 __compat_uid16_t;
40 typedef u16 __compat_gid16_t;
41 typedef u32 __compat_uid32_t;
42 typedef u32 __compat_gid32_t;
43 typedef u16 compat_mode_t;
44 typedef u32 compat_dev_t;
45 typedef s32 compat_nlink_t;
46 typedef u16 compat_ipc_pid_t;
47 typedef u32 compat_caddr_t;
48 typedef __kernel_fsid_t compat_fsid_t;
49 typedef s64 compat_s64;
50 typedef u64 compat_u64;
60 compat_mode_t st_mode;
61 compat_ushort_t st_nlink;
62 __compat_uid16_t st_uid;
63 __compat_gid16_t st_gid;
71 compat_off_t st_blksize;
72 compat_off_t st_blocks;
73 old_time32_t st_atime;
74 compat_ulong_t st_atime_nsec;
75 old_time32_t st_mtime;
76 compat_ulong_t st_mtime_nsec;
77 old_time32_t st_ctime;
78 compat_ulong_t st_ctime_nsec;
79 compat_ulong_t __unused4[2];
90 #define F_GETLK64 12 /* using 'struct flock64' */
94 struct compat_flock64 {
97 compat_loff_t l_start;
102 struct compat_statfs {
110 compat_fsid_t f_fsid;
111 int f_namelen; /* SunOS ignores this field. */
117 #define COMPAT_RLIM_INFINITY 0xffffffff
119 typedef u32 compat_old_sigset_t;
121 #define _COMPAT_NSIG 64
122 #define _COMPAT_NSIG_BPW 32
124 typedef u32 compat_sigset_word;
126 #define COMPAT_OFF_T_MAX 0x7fffffff
129 * A pointer passed in from user mode. This should not
130 * be used for syscall parameters, just declare them
131 * as pointers because the syscall entry code will have
132 * appropriately converted them already.
135 static inline void __user *compat_ptr(compat_uptr_t uptr)
137 return (void __user *)(unsigned long)uptr;
140 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
142 return (u32)(unsigned long)uptr;
145 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
146 #define COMPAT_MINSIGSTKSZ 2048
148 static inline void __user *arch_compat_alloc_user_space(long len)
150 return (void __user *)compat_user_stack_pointer() - len;
153 struct compat_ipc64_perm {
155 __compat_uid32_t uid;
156 __compat_gid32_t gid;
157 __compat_uid32_t cuid;
158 __compat_gid32_t cgid;
160 unsigned short __pad1;
162 unsigned short __pad2;
163 compat_ulong_t unused1;
164 compat_ulong_t unused2;
167 struct compat_semid64_ds {
168 struct compat_ipc64_perm sem_perm;
169 compat_ulong_t sem_otime;
170 compat_ulong_t sem_otime_high;
171 compat_ulong_t sem_ctime;
172 compat_ulong_t sem_ctime_high;
173 compat_ulong_t sem_nsems;
174 compat_ulong_t __unused3;
175 compat_ulong_t __unused4;
178 struct compat_msqid64_ds {
179 struct compat_ipc64_perm msg_perm;
180 compat_ulong_t msg_stime;
181 compat_ulong_t msg_stime_high;
182 compat_ulong_t msg_rtime;
183 compat_ulong_t msg_rtime_high;
184 compat_ulong_t msg_ctime;
185 compat_ulong_t msg_ctime_high;
186 compat_ulong_t msg_cbytes;
187 compat_ulong_t msg_qnum;
188 compat_ulong_t msg_qbytes;
189 compat_pid_t msg_lspid;
190 compat_pid_t msg_lrpid;
191 compat_ulong_t __unused4;
192 compat_ulong_t __unused5;
195 struct compat_shmid64_ds {
196 struct compat_ipc64_perm shm_perm;
197 compat_size_t shm_segsz;
198 compat_ulong_t shm_atime;
199 compat_ulong_t shm_atime_high;
200 compat_ulong_t shm_dtime;
201 compat_ulong_t shm_dtime_high;
202 compat_ulong_t shm_ctime;
203 compat_ulong_t shm_ctime_high;
204 compat_pid_t shm_cpid;
205 compat_pid_t shm_lpid;
206 compat_ulong_t shm_nattch;
207 compat_ulong_t __unused4;
208 compat_ulong_t __unused5;
211 static inline int is_compat_task(void)
213 return test_thread_flag(TIF_32BIT);
216 static inline int is_compat_thread(struct thread_info *thread)
218 return test_ti_thread_flag(thread, TIF_32BIT);
221 #else /* !CONFIG_COMPAT */
223 static inline int is_compat_thread(struct thread_info *thread)
228 #endif /* CONFIG_COMPAT */
229 #endif /* __KERNEL__ */
230 #endif /* __ASM_COMPAT_H */