1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_COMPAT_H 3 #define _ASM_POWERPC_COMPAT_H 4 #ifdef __KERNEL__ 5 /* 6 * Architecture specific compatibility types 7 */ 8 #include <linux/types.h> 9 #include <linux/sched.h> 10 11 #define COMPAT_USER_HZ 100 12 #ifdef __BIG_ENDIAN__ 13 #define COMPAT_UTS_MACHINE "ppc\0\0" 14 #else 15 #define COMPAT_UTS_MACHINE "ppcle\0\0" 16 #endif 17 18 typedef u32 compat_size_t; 19 typedef s32 compat_ssize_t; 20 typedef s32 compat_clock_t; 21 typedef s32 compat_pid_t; 22 typedef u32 __compat_uid_t; 23 typedef u32 __compat_gid_t; 24 typedef u32 __compat_uid32_t; 25 typedef u32 __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 s16 compat_nlink_t; 32 typedef u16 compat_ipc_pid_t; 33 typedef s32 compat_daddr_t; 34 typedef u32 compat_caddr_t; 35 typedef __kernel_fsid_t compat_fsid_t; 36 typedef s32 compat_key_t; 37 typedef s32 compat_timer_t; 38 39 typedef s32 compat_int_t; 40 typedef s32 compat_long_t; 41 typedef s64 compat_s64; 42 typedef u32 compat_uint_t; 43 typedef u32 compat_ulong_t; 44 typedef u64 compat_u64; 45 typedef u32 compat_uptr_t; 46 47 struct compat_stat { 48 compat_dev_t st_dev; 49 compat_ino_t st_ino; 50 compat_mode_t st_mode; 51 compat_nlink_t st_nlink; 52 __compat_uid32_t st_uid; 53 __compat_gid32_t st_gid; 54 compat_dev_t st_rdev; 55 compat_off_t st_size; 56 compat_off_t st_blksize; 57 compat_off_t st_blocks; 58 compat_time_t st_atime; 59 u32 st_atime_nsec; 60 compat_time_t st_mtime; 61 u32 st_mtime_nsec; 62 compat_time_t st_ctime; 63 u32 st_ctime_nsec; 64 u32 __unused4[2]; 65 }; 66 67 struct compat_flock { 68 short l_type; 69 short l_whence; 70 compat_off_t l_start; 71 compat_off_t l_len; 72 compat_pid_t l_pid; 73 }; 74 75 #define F_GETLK64 12 /* using 'struct flock64' */ 76 #define F_SETLK64 13 77 #define F_SETLKW64 14 78 79 struct compat_flock64 { 80 short l_type; 81 short l_whence; 82 compat_loff_t l_start; 83 compat_loff_t l_len; 84 compat_pid_t l_pid; 85 }; 86 87 struct compat_statfs { 88 int f_type; 89 int f_bsize; 90 int f_blocks; 91 int f_bfree; 92 int f_bavail; 93 int f_files; 94 int f_ffree; 95 compat_fsid_t f_fsid; 96 int f_namelen; /* SunOS ignores this field. */ 97 int f_frsize; 98 int f_flags; 99 int f_spare[4]; 100 }; 101 102 #define COMPAT_RLIM_INFINITY 0xffffffff 103 104 typedef u32 compat_old_sigset_t; 105 106 #define _COMPAT_NSIG 64 107 #define _COMPAT_NSIG_BPW 32 108 109 typedef u32 compat_sigset_word; 110 111 #define COMPAT_OFF_T_MAX 0x7fffffff 112 113 /* 114 * A pointer passed in from user mode. This should not 115 * be used for syscall parameters, just declare them 116 * as pointers because the syscall entry code will have 117 * appropriately converted them already. 118 */ 119 120 static inline void __user *compat_ptr(compat_uptr_t uptr) 121 { 122 return (void __user *)(unsigned long)uptr; 123 } 124 125 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 126 { 127 return (u32)(unsigned long)uptr; 128 } 129 130 static inline void __user *arch_compat_alloc_user_space(long len) 131 { 132 struct pt_regs *regs = current->thread.regs; 133 unsigned long usp = regs->gpr[1]; 134 135 /* 136 * We can't access below the stack pointer in the 32bit ABI and 137 * can access 288 bytes in the 64bit big-endian ABI, 138 * or 512 bytes with the new ELFv2 little-endian ABI. 139 */ 140 if (!is_32bit_task()) 141 usp -= USER_REDZONE_SIZE; 142 143 return (void __user *) (usp - len); 144 } 145 146 /* 147 * ipc64_perm is actually 32/64bit clean but since the compat layer refers to 148 * it we may as well define it. 149 */ 150 struct compat_ipc64_perm { 151 compat_key_t key; 152 __compat_uid_t uid; 153 __compat_gid_t gid; 154 __compat_uid_t cuid; 155 __compat_gid_t cgid; 156 compat_mode_t mode; 157 unsigned int seq; 158 unsigned int __pad2; 159 unsigned long __unused1; /* yes they really are 64bit pads */ 160 unsigned long __unused2; 161 }; 162 163 struct compat_semid64_ds { 164 struct compat_ipc64_perm sem_perm; 165 unsigned int sem_otime_high; 166 unsigned int sem_otime; 167 unsigned int sem_ctime_high; 168 unsigned int sem_ctime; 169 compat_ulong_t sem_nsems; 170 compat_ulong_t __unused3; 171 compat_ulong_t __unused4; 172 }; 173 174 struct compat_msqid64_ds { 175 struct compat_ipc64_perm msg_perm; 176 unsigned int msg_stime_high; 177 unsigned int msg_stime; 178 unsigned int msg_rtime_high; 179 unsigned int msg_rtime; 180 unsigned int msg_ctime_high; 181 unsigned int msg_ctime; 182 compat_ulong_t msg_cbytes; 183 compat_ulong_t msg_qnum; 184 compat_ulong_t msg_qbytes; 185 compat_pid_t msg_lspid; 186 compat_pid_t msg_lrpid; 187 compat_ulong_t __unused4; 188 compat_ulong_t __unused5; 189 }; 190 191 struct compat_shmid64_ds { 192 struct compat_ipc64_perm shm_perm; 193 unsigned int shm_atime_high; 194 unsigned int shm_atime; 195 unsigned int shm_dtime_high; 196 unsigned int shm_dtime; 197 unsigned int shm_ctime_high; 198 unsigned int shm_ctime; 199 unsigned int __unused4; 200 compat_size_t shm_segsz; 201 compat_pid_t shm_cpid; 202 compat_pid_t shm_lpid; 203 compat_ulong_t shm_nattch; 204 compat_ulong_t __unused5; 205 compat_ulong_t __unused6; 206 }; 207 208 static inline int is_compat_task(void) 209 { 210 return is_32bit_task(); 211 } 212 213 #endif /* __KERNEL__ */ 214 #endif /* _ASM_POWERPC_COMPAT_H */ 215