1 /* SPDX-License-Identifier: GPL-2.0 */
5 * Architecture specific compatibility types
7 #include <linux/thread_info.h>
8 #include <linux/types.h>
10 #include <asm/ptrace.h>
12 #include <asm-generic/compat.h>
14 #define COMPAT_USER_HZ 100
15 #define COMPAT_UTS_MACHINE "mips\0\0\0"
17 typedef s32 __compat_uid_t;
18 typedef s32 __compat_gid_t;
19 typedef __compat_uid_t __compat_uid32_t;
20 typedef __compat_gid_t __compat_gid32_t;
21 typedef u32 compat_mode_t;
22 typedef u32 compat_dev_t;
23 typedef u32 compat_nlink_t;
24 typedef s32 compat_ipc_pid_t;
25 typedef s32 compat_caddr_t;
29 typedef s64 compat_s64;
30 typedef u64 compat_u64;
36 compat_mode_t st_mode;
37 compat_nlink_t st_nlink;
38 __compat_uid_t st_uid;
39 __compat_gid_t st_gid;
44 old_time32_t st_atime;
46 old_time32_t st_mtime;
48 old_time32_t st_ctime;
69 struct compat_flock64 {
72 compat_loff_t l_start;
77 struct compat_statfs {
92 #define COMPAT_RLIM_INFINITY 0x7fffffffUL
94 typedef u32 compat_old_sigset_t; /* at least 32 bits */
96 #define _COMPAT_NSIG 128 /* Don't ask !$@#% ... */
97 #define _COMPAT_NSIG_BPW 32
99 typedef u32 compat_sigset_word;
101 #define COMPAT_OFF_T_MAX 0x7fffffff
104 * A pointer passed in from user mode. This should not
105 * be used for syscall parameters, just declare them
106 * as pointers because the syscall entry code will have
107 * appropriately converted them already.
110 static inline void __user *compat_ptr(compat_uptr_t uptr)
112 /* cast to a __user pointer via "unsigned long" makes sparse happy */
113 return (void __user *)(unsigned long)(long)uptr;
116 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
118 return (u32)(unsigned long)uptr;
121 static inline void __user *arch_compat_alloc_user_space(long len)
123 struct pt_regs *regs = (struct pt_regs *)
124 ((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;
126 return (void __user *) (regs->regs[29] - len);
129 struct compat_ipc64_perm {
131 __compat_uid32_t uid;
132 __compat_gid32_t gid;
133 __compat_uid32_t cuid;
134 __compat_gid32_t cgid;
137 unsigned short __pad2;
138 compat_ulong_t __unused1;
139 compat_ulong_t __unused2;
142 struct compat_semid64_ds {
143 struct compat_ipc64_perm sem_perm;
144 compat_ulong_t sem_otime;
145 compat_ulong_t sem_ctime;
146 compat_ulong_t sem_nsems;
147 compat_ulong_t sem_otime_high;
148 compat_ulong_t sem_ctime_high;
151 struct compat_msqid64_ds {
152 struct compat_ipc64_perm msg_perm;
153 #ifndef CONFIG_CPU_LITTLE_ENDIAN
154 compat_ulong_t msg_stime_high;
156 compat_ulong_t msg_stime;
157 #ifdef CONFIG_CPU_LITTLE_ENDIAN
158 compat_ulong_t msg_stime_high;
160 #ifndef CONFIG_CPU_LITTLE_ENDIAN
161 compat_ulong_t msg_rtime_high;
163 compat_ulong_t msg_rtime;
164 #ifdef CONFIG_CPU_LITTLE_ENDIAN
165 compat_ulong_t msg_rtime_high;
167 #ifndef CONFIG_CPU_LITTLE_ENDIAN
168 compat_ulong_t msg_ctime_high;
170 compat_ulong_t msg_ctime;
171 #ifdef CONFIG_CPU_LITTLE_ENDIAN
172 compat_ulong_t msg_ctime_high;
174 compat_ulong_t msg_cbytes;
175 compat_ulong_t msg_qnum;
176 compat_ulong_t msg_qbytes;
177 compat_pid_t msg_lspid;
178 compat_pid_t msg_lrpid;
179 compat_ulong_t __unused4;
180 compat_ulong_t __unused5;
183 struct compat_shmid64_ds {
184 struct compat_ipc64_perm shm_perm;
185 compat_size_t shm_segsz;
186 compat_ulong_t shm_atime;
187 compat_ulong_t shm_dtime;
188 compat_ulong_t shm_ctime;
189 compat_pid_t shm_cpid;
190 compat_pid_t shm_lpid;
191 compat_ulong_t shm_nattch;
192 compat_ushort_t shm_atime_high;
193 compat_ushort_t shm_dtime_high;
194 compat_ushort_t shm_ctime_high;
195 compat_ushort_t __unused2;
198 /* MIPS has unusual order of fields in stack_t */
199 typedef struct compat_sigaltstack {
201 compat_size_t ss_size;
204 #define compat_sigaltstack compat_sigaltstack
206 static inline int is_compat_task(void)
208 return test_thread_flag(TIF_32BIT_ADDR);
211 #endif /* _ASM_COMPAT_H */