1 /* 2 * Copyright (C) 2012 ARM Ltd. 3 * 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. 7 * 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. 12 * 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/>. 15 */ 16 #ifndef __ASM_COMPAT_H 17 #define __ASM_COMPAT_H 18 #ifdef __KERNEL__ 19 #ifdef CONFIG_COMPAT 20 21 /* 22 * Architecture specific compatibility types 23 */ 24 #include <linux/types.h> 25 #include <linux/sched.h> 26 #include <linux/sched/task_stack.h> 27 28 #define COMPAT_USER_HZ 100 29 #ifdef __AARCH64EB__ 30 #define COMPAT_UTS_MACHINE "armv8b\0\0" 31 #else 32 #define COMPAT_UTS_MACHINE "armv8l\0\0" 33 #endif 34 35 typedef u32 compat_size_t; 36 typedef s32 compat_ssize_t; 37 typedef s32 compat_clock_t; 38 typedef s32 compat_pid_t; 39 typedef u16 __compat_uid_t; 40 typedef u16 __compat_gid_t; 41 typedef u16 __compat_uid16_t; 42 typedef u16 __compat_gid16_t; 43 typedef u32 __compat_uid32_t; 44 typedef u32 __compat_gid32_t; 45 typedef u16 compat_mode_t; 46 typedef u32 compat_ino_t; 47 typedef u32 compat_dev_t; 48 typedef s32 compat_off_t; 49 typedef s64 compat_loff_t; 50 typedef s32 compat_nlink_t; 51 typedef u16 compat_ipc_pid_t; 52 typedef s32 compat_daddr_t; 53 typedef u32 compat_caddr_t; 54 typedef __kernel_fsid_t compat_fsid_t; 55 typedef s32 compat_key_t; 56 typedef s32 compat_timer_t; 57 58 typedef s16 compat_short_t; 59 typedef s32 compat_int_t; 60 typedef s32 compat_long_t; 61 typedef s64 compat_s64; 62 typedef u16 compat_ushort_t; 63 typedef u32 compat_uint_t; 64 typedef u32 compat_ulong_t; 65 typedef u64 compat_u64; 66 typedef u32 compat_uptr_t; 67 68 struct compat_stat { 69 #ifdef __AARCH64EB__ 70 short st_dev; 71 short __pad1; 72 #else 73 compat_dev_t st_dev; 74 #endif 75 compat_ino_t st_ino; 76 compat_mode_t st_mode; 77 compat_ushort_t st_nlink; 78 __compat_uid16_t st_uid; 79 __compat_gid16_t st_gid; 80 #ifdef __AARCH64EB__ 81 short st_rdev; 82 short __pad2; 83 #else 84 compat_dev_t st_rdev; 85 #endif 86 compat_off_t st_size; 87 compat_off_t st_blksize; 88 compat_off_t st_blocks; 89 compat_time_t st_atime; 90 compat_ulong_t st_atime_nsec; 91 compat_time_t st_mtime; 92 compat_ulong_t st_mtime_nsec; 93 compat_time_t st_ctime; 94 compat_ulong_t st_ctime_nsec; 95 compat_ulong_t __unused4[2]; 96 }; 97 98 struct compat_flock { 99 short l_type; 100 short l_whence; 101 compat_off_t l_start; 102 compat_off_t l_len; 103 compat_pid_t l_pid; 104 }; 105 106 #define F_GETLK64 12 /* using 'struct flock64' */ 107 #define F_SETLK64 13 108 #define F_SETLKW64 14 109 110 struct compat_flock64 { 111 short l_type; 112 short l_whence; 113 compat_loff_t l_start; 114 compat_loff_t l_len; 115 compat_pid_t l_pid; 116 }; 117 118 struct compat_statfs { 119 int f_type; 120 int f_bsize; 121 int f_blocks; 122 int f_bfree; 123 int f_bavail; 124 int f_files; 125 int f_ffree; 126 compat_fsid_t f_fsid; 127 int f_namelen; /* SunOS ignores this field. */ 128 int f_frsize; 129 int f_flags; 130 int f_spare[4]; 131 }; 132 133 #define COMPAT_RLIM_INFINITY 0xffffffff 134 135 typedef u32 compat_old_sigset_t; 136 137 #define _COMPAT_NSIG 64 138 #define _COMPAT_NSIG_BPW 32 139 140 typedef u32 compat_sigset_word; 141 142 #define COMPAT_OFF_T_MAX 0x7fffffff 143 144 /* 145 * A pointer passed in from user mode. This should not 146 * be used for syscall parameters, just declare them 147 * as pointers because the syscall entry code will have 148 * appropriately converted them already. 149 */ 150 151 static inline void __user *compat_ptr(compat_uptr_t uptr) 152 { 153 return (void __user *)(unsigned long)uptr; 154 } 155 156 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 157 { 158 return (u32)(unsigned long)uptr; 159 } 160 161 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current))) 162 #define COMPAT_MINSIGSTKSZ 2048 163 164 static inline void __user *arch_compat_alloc_user_space(long len) 165 { 166 return (void __user *)compat_user_stack_pointer() - len; 167 } 168 169 struct compat_ipc64_perm { 170 compat_key_t key; 171 __compat_uid32_t uid; 172 __compat_gid32_t gid; 173 __compat_uid32_t cuid; 174 __compat_gid32_t cgid; 175 unsigned short mode; 176 unsigned short __pad1; 177 unsigned short seq; 178 unsigned short __pad2; 179 compat_ulong_t unused1; 180 compat_ulong_t unused2; 181 }; 182 183 struct compat_semid64_ds { 184 struct compat_ipc64_perm sem_perm; 185 compat_ulong_t sem_otime; 186 compat_ulong_t sem_otime_high; 187 compat_ulong_t sem_ctime; 188 compat_ulong_t sem_ctime_high; 189 compat_ulong_t sem_nsems; 190 compat_ulong_t __unused3; 191 compat_ulong_t __unused4; 192 }; 193 194 struct compat_msqid64_ds { 195 struct compat_ipc64_perm msg_perm; 196 compat_ulong_t msg_stime; 197 compat_ulong_t msg_stime_high; 198 compat_ulong_t msg_rtime; 199 compat_ulong_t msg_rtime_high; 200 compat_ulong_t msg_ctime; 201 compat_ulong_t msg_ctime_high; 202 compat_ulong_t msg_cbytes; 203 compat_ulong_t msg_qnum; 204 compat_ulong_t msg_qbytes; 205 compat_pid_t msg_lspid; 206 compat_pid_t msg_lrpid; 207 compat_ulong_t __unused4; 208 compat_ulong_t __unused5; 209 }; 210 211 struct compat_shmid64_ds { 212 struct compat_ipc64_perm shm_perm; 213 compat_size_t shm_segsz; 214 compat_ulong_t shm_atime; 215 compat_ulong_t shm_atime_high; 216 compat_ulong_t shm_dtime; 217 compat_ulong_t shm_dtime_high; 218 compat_ulong_t shm_ctime; 219 compat_ulong_t shm_ctime_high; 220 compat_pid_t shm_cpid; 221 compat_pid_t shm_lpid; 222 compat_ulong_t shm_nattch; 223 compat_ulong_t __unused4; 224 compat_ulong_t __unused5; 225 }; 226 227 static inline int is_compat_task(void) 228 { 229 return test_thread_flag(TIF_32BIT); 230 } 231 232 static inline int is_compat_thread(struct thread_info *thread) 233 { 234 return test_ti_thread_flag(thread, TIF_32BIT); 235 } 236 237 #else /* !CONFIG_COMPAT */ 238 239 static inline int is_compat_thread(struct thread_info *thread) 240 { 241 return 0; 242 } 243 244 #endif /* CONFIG_COMPAT */ 245 #endif /* __KERNEL__ */ 246 #endif /* __ASM_COMPAT_H */ 247