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 #include <asm-generic/compat.h> 12 13 #define COMPAT_USER_HZ 100 14 #ifdef __BIG_ENDIAN__ 15 #define COMPAT_UTS_MACHINE "ppc\0\0" 16 #else 17 #define COMPAT_UTS_MACHINE "ppcle\0\0" 18 #endif 19 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; 32 33 struct compat_stat { 34 compat_dev_t st_dev; 35 compat_ino_t st_ino; 36 compat_mode_t st_mode; 37 compat_nlink_t st_nlink; 38 __compat_uid32_t st_uid; 39 __compat_gid32_t st_gid; 40 compat_dev_t st_rdev; 41 compat_off_t st_size; 42 compat_off_t st_blksize; 43 compat_off_t st_blocks; 44 old_time32_t st_atime; 45 u32 st_atime_nsec; 46 old_time32_t st_mtime; 47 u32 st_mtime_nsec; 48 old_time32_t st_ctime; 49 u32 st_ctime_nsec; 50 u32 __unused4[2]; 51 }; 52 53 struct compat_flock { 54 short l_type; 55 short l_whence; 56 compat_off_t l_start; 57 compat_off_t l_len; 58 compat_pid_t l_pid; 59 }; 60 61 #define F_GETLK64 12 /* using 'struct flock64' */ 62 #define F_SETLK64 13 63 #define F_SETLKW64 14 64 65 struct compat_flock64 { 66 short l_type; 67 short l_whence; 68 compat_loff_t l_start; 69 compat_loff_t l_len; 70 compat_pid_t l_pid; 71 }; 72 73 struct compat_statfs { 74 int f_type; 75 int f_bsize; 76 int f_blocks; 77 int f_bfree; 78 int f_bavail; 79 int f_files; 80 int f_ffree; 81 compat_fsid_t f_fsid; 82 int f_namelen; /* SunOS ignores this field. */ 83 int f_frsize; 84 int f_flags; 85 int f_spare[4]; 86 }; 87 88 #define COMPAT_RLIM_INFINITY 0xffffffff 89 90 typedef u32 compat_old_sigset_t; 91 92 #define _COMPAT_NSIG 64 93 #define _COMPAT_NSIG_BPW 32 94 95 typedef u32 compat_sigset_word; 96 97 #define COMPAT_OFF_T_MAX 0x7fffffff 98 99 /* 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. 104 */ 105 106 static inline void __user *compat_ptr(compat_uptr_t uptr) 107 { 108 return (void __user *)(unsigned long)uptr; 109 } 110 111 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 112 { 113 return (u32)(unsigned long)uptr; 114 } 115 116 static inline void __user *arch_compat_alloc_user_space(long len) 117 { 118 struct pt_regs *regs = current->thread.regs; 119 unsigned long usp = regs->gpr[1]; 120 121 /* 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. 125 */ 126 if (!is_32bit_task()) 127 usp -= USER_REDZONE_SIZE; 128 129 return (void __user *) (usp - len); 130 } 131 132 /* 133 * ipc64_perm is actually 32/64bit clean but since the compat layer refers to 134 * it we may as well define it. 135 */ 136 struct compat_ipc64_perm { 137 compat_key_t key; 138 __compat_uid_t uid; 139 __compat_gid_t gid; 140 __compat_uid_t cuid; 141 __compat_gid_t cgid; 142 compat_mode_t mode; 143 unsigned int seq; 144 unsigned int __pad2; 145 unsigned long __unused1; /* yes they really are 64bit pads */ 146 unsigned long __unused2; 147 }; 148 149 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; 158 }; 159 160 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; 175 }; 176 177 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; 192 }; 193 194 static inline int is_compat_task(void) 195 { 196 return is_32bit_task(); 197 } 198 199 #endif /* __KERNEL__ */ 200 #endif /* _ASM_POWERPC_COMPAT_H */ 201