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 #include <asm-generic/compat.h> 29 30 #define COMPAT_USER_HZ 100 31 #ifdef __AARCH64EB__ 32 #define COMPAT_UTS_MACHINE "armv8b\0\0" 33 #else 34 #define COMPAT_UTS_MACHINE "armv8l\0\0" 35 #endif 36 37 typedef u16 __compat_uid_t; 38 typedef u16 __compat_gid_t; 39 typedef u16 __compat_uid16_t; 40 typedef u16 __compat_gid16_t; 41 typedef u32 __compat_uid32_t; 42 typedef u32 __compat_gid32_t; 43 typedef u16 compat_mode_t; 44 typedef u32 compat_dev_t; 45 typedef s32 compat_nlink_t; 46 typedef u16 compat_ipc_pid_t; 47 typedef u32 compat_caddr_t; 48 typedef __kernel_fsid_t compat_fsid_t; 49 typedef s64 compat_s64; 50 typedef u64 compat_u64; 51 52 struct compat_stat { 53 #ifdef __AARCH64EB__ 54 short st_dev; 55 short __pad1; 56 #else 57 compat_dev_t st_dev; 58 #endif 59 compat_ino_t st_ino; 60 compat_mode_t st_mode; 61 compat_ushort_t st_nlink; 62 __compat_uid16_t st_uid; 63 __compat_gid16_t st_gid; 64 #ifdef __AARCH64EB__ 65 short st_rdev; 66 short __pad2; 67 #else 68 compat_dev_t st_rdev; 69 #endif 70 compat_off_t st_size; 71 compat_off_t st_blksize; 72 compat_off_t st_blocks; 73 old_time32_t st_atime; 74 compat_ulong_t st_atime_nsec; 75 old_time32_t st_mtime; 76 compat_ulong_t st_mtime_nsec; 77 old_time32_t st_ctime; 78 compat_ulong_t st_ctime_nsec; 79 compat_ulong_t __unused4[2]; 80 }; 81 82 struct compat_flock { 83 short l_type; 84 short l_whence; 85 compat_off_t l_start; 86 compat_off_t l_len; 87 compat_pid_t l_pid; 88 }; 89 90 #define F_GETLK64 12 /* using 'struct flock64' */ 91 #define F_SETLK64 13 92 #define F_SETLKW64 14 93 94 struct compat_flock64 { 95 short l_type; 96 short l_whence; 97 compat_loff_t l_start; 98 compat_loff_t l_len; 99 compat_pid_t l_pid; 100 }; 101 102 struct compat_statfs { 103 int f_type; 104 int f_bsize; 105 int f_blocks; 106 int f_bfree; 107 int f_bavail; 108 int f_files; 109 int f_ffree; 110 compat_fsid_t f_fsid; 111 int f_namelen; /* SunOS ignores this field. */ 112 int f_frsize; 113 int f_flags; 114 int f_spare[4]; 115 }; 116 117 #define COMPAT_RLIM_INFINITY 0xffffffff 118 119 typedef u32 compat_old_sigset_t; 120 121 #define _COMPAT_NSIG 64 122 #define _COMPAT_NSIG_BPW 32 123 124 typedef u32 compat_sigset_word; 125 126 #define COMPAT_OFF_T_MAX 0x7fffffff 127 128 /* 129 * A pointer passed in from user mode. This should not 130 * be used for syscall parameters, just declare them 131 * as pointers because the syscall entry code will have 132 * appropriately converted them already. 133 */ 134 135 static inline void __user *compat_ptr(compat_uptr_t uptr) 136 { 137 return (void __user *)(unsigned long)uptr; 138 } 139 140 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 141 { 142 return (u32)(unsigned long)uptr; 143 } 144 145 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current))) 146 147 static inline void __user *arch_compat_alloc_user_space(long len) 148 { 149 return (void __user *)compat_user_stack_pointer() - len; 150 } 151 152 struct compat_ipc64_perm { 153 compat_key_t key; 154 __compat_uid32_t uid; 155 __compat_gid32_t gid; 156 __compat_uid32_t cuid; 157 __compat_gid32_t cgid; 158 unsigned short mode; 159 unsigned short __pad1; 160 unsigned short seq; 161 unsigned short __pad2; 162 compat_ulong_t unused1; 163 compat_ulong_t unused2; 164 }; 165 166 struct compat_semid64_ds { 167 struct compat_ipc64_perm sem_perm; 168 compat_ulong_t sem_otime; 169 compat_ulong_t sem_otime_high; 170 compat_ulong_t sem_ctime; 171 compat_ulong_t sem_ctime_high; 172 compat_ulong_t sem_nsems; 173 compat_ulong_t __unused3; 174 compat_ulong_t __unused4; 175 }; 176 177 struct compat_msqid64_ds { 178 struct compat_ipc64_perm msg_perm; 179 compat_ulong_t msg_stime; 180 compat_ulong_t msg_stime_high; 181 compat_ulong_t msg_rtime; 182 compat_ulong_t msg_rtime_high; 183 compat_ulong_t msg_ctime; 184 compat_ulong_t msg_ctime_high; 185 compat_ulong_t msg_cbytes; 186 compat_ulong_t msg_qnum; 187 compat_ulong_t msg_qbytes; 188 compat_pid_t msg_lspid; 189 compat_pid_t msg_lrpid; 190 compat_ulong_t __unused4; 191 compat_ulong_t __unused5; 192 }; 193 194 struct compat_shmid64_ds { 195 struct compat_ipc64_perm shm_perm; 196 compat_size_t shm_segsz; 197 compat_ulong_t shm_atime; 198 compat_ulong_t shm_atime_high; 199 compat_ulong_t shm_dtime; 200 compat_ulong_t shm_dtime_high; 201 compat_ulong_t shm_ctime; 202 compat_ulong_t shm_ctime_high; 203 compat_pid_t shm_cpid; 204 compat_pid_t shm_lpid; 205 compat_ulong_t shm_nattch; 206 compat_ulong_t __unused4; 207 compat_ulong_t __unused5; 208 }; 209 210 static inline int is_compat_task(void) 211 { 212 return test_thread_flag(TIF_32BIT); 213 } 214 215 static inline int is_compat_thread(struct thread_info *thread) 216 { 217 return test_ti_thread_flag(thread, TIF_32BIT); 218 } 219 220 #else /* !CONFIG_COMPAT */ 221 222 static inline int is_compat_thread(struct thread_info *thread) 223 { 224 return 0; 225 } 226 227 #endif /* CONFIG_COMPAT */ 228 #endif /* __KERNEL__ */ 229 #endif /* __ASM_COMPAT_H */ 230