1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_COMPAT_H
3 #define _ASM_POWERPC_COMPAT_H
6 * Architecture specific compatibility types
8 #include <linux/types.h>
9 #include <linux/sched.h>
11 #include <asm-generic/compat.h>
13 #define COMPAT_USER_HZ 100
15 #define COMPAT_UTS_MACHINE "ppc\0\0"
17 #define COMPAT_UTS_MACHINE "ppcle\0\0"
20 typedef u32 __compat_uid_t;
21 typedef u32 __compat_gid_t;
22 typedef u32 __compat_uid32_t;
23 typedef u32 __compat_gid32_t;
24 typedef u32 compat_mode_t;
25 typedef u32 compat_dev_t;
26 typedef s16 compat_nlink_t;
27 typedef u16 compat_ipc_pid_t;
28 typedef u32 compat_caddr_t;
29 typedef __kernel_fsid_t compat_fsid_t;
30 typedef s64 compat_s64;
31 typedef u64 compat_u64;
36 compat_mode_t st_mode;
37 compat_nlink_t st_nlink;
38 __compat_uid32_t st_uid;
39 __compat_gid32_t st_gid;
42 compat_off_t st_blksize;
43 compat_off_t st_blocks;
44 old_time32_t st_atime;
46 old_time32_t st_mtime;
48 old_time32_t st_ctime;
61 #define F_GETLK64 12 /* using 'struct flock64' */
65 struct compat_flock64 {
68 compat_loff_t l_start;
73 struct compat_statfs {
82 int f_namelen; /* SunOS ignores this field. */
88 #define COMPAT_RLIM_INFINITY 0xffffffff
90 typedef u32 compat_old_sigset_t;
92 #define _COMPAT_NSIG 64
93 #define _COMPAT_NSIG_BPW 32
95 typedef u32 compat_sigset_word;
97 #define COMPAT_OFF_T_MAX 0x7fffffff
100 * A pointer passed in from user mode. This should not
101 * be used for syscall parameters, just declare them
102 * as pointers because the syscall entry code will have
103 * appropriately converted them already.
106 static inline void __user *compat_ptr(compat_uptr_t uptr)
108 return (void __user *)(unsigned long)uptr;
111 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
113 return (u32)(unsigned long)uptr;
116 static inline void __user *arch_compat_alloc_user_space(long len)
118 struct pt_regs *regs = current->thread.regs;
119 unsigned long usp = regs->gpr[1];
122 * We can't access below the stack pointer in the 32bit ABI and
123 * can access 288 bytes in the 64bit big-endian ABI,
124 * or 512 bytes with the new ELFv2 little-endian ABI.
126 if (!is_32bit_task())
127 usp -= USER_REDZONE_SIZE;
129 return (void __user *) (usp - len);
133 * ipc64_perm is actually 32/64bit clean but since the compat layer refers to
134 * it we may as well define it.
136 struct compat_ipc64_perm {
145 unsigned long __unused1; /* yes they really are 64bit pads */
146 unsigned long __unused2;
149 struct compat_semid64_ds {
150 struct compat_ipc64_perm sem_perm;
151 unsigned int sem_otime_high;
152 unsigned int sem_otime;
153 unsigned int sem_ctime_high;
154 unsigned int sem_ctime;
155 compat_ulong_t sem_nsems;
156 compat_ulong_t __unused3;
157 compat_ulong_t __unused4;
160 struct compat_msqid64_ds {
161 struct compat_ipc64_perm msg_perm;
162 unsigned int msg_stime_high;
163 unsigned int msg_stime;
164 unsigned int msg_rtime_high;
165 unsigned int msg_rtime;
166 unsigned int msg_ctime_high;
167 unsigned int msg_ctime;
168 compat_ulong_t msg_cbytes;
169 compat_ulong_t msg_qnum;
170 compat_ulong_t msg_qbytes;
171 compat_pid_t msg_lspid;
172 compat_pid_t msg_lrpid;
173 compat_ulong_t __unused4;
174 compat_ulong_t __unused5;
177 struct compat_shmid64_ds {
178 struct compat_ipc64_perm shm_perm;
179 unsigned int shm_atime_high;
180 unsigned int shm_atime;
181 unsigned int shm_dtime_high;
182 unsigned int shm_dtime;
183 unsigned int shm_ctime_high;
184 unsigned int shm_ctime;
185 unsigned int __unused4;
186 compat_size_t shm_segsz;
187 compat_pid_t shm_cpid;
188 compat_pid_t shm_lpid;
189 compat_ulong_t shm_nattch;
190 compat_ulong_t __unused5;
191 compat_ulong_t __unused6;
194 static inline int is_compat_task(void)
196 return is_32bit_task();
199 #endif /* __KERNEL__ */
200 #endif /* _ASM_POWERPC_COMPAT_H */