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_time_t; 38 typedef s32 compat_clock_t; 39 typedef s32 compat_pid_t; 40 typedef u16 __compat_uid_t; 41 typedef u16 __compat_gid_t; 42 typedef u16 __compat_uid16_t; 43 typedef u16 __compat_gid16_t; 44 typedef u32 __compat_uid32_t; 45 typedef u32 __compat_gid32_t; 46 typedef u16 compat_mode_t; 47 typedef u32 compat_ino_t; 48 typedef u32 compat_dev_t; 49 typedef s32 compat_off_t; 50 typedef s64 compat_loff_t; 51 typedef s32 compat_nlink_t; 52 typedef u16 compat_ipc_pid_t; 53 typedef s32 compat_daddr_t; 54 typedef u32 compat_caddr_t; 55 typedef __kernel_fsid_t compat_fsid_t; 56 typedef s32 compat_key_t; 57 typedef s32 compat_timer_t; 58 59 typedef s16 compat_short_t; 60 typedef s32 compat_int_t; 61 typedef s32 compat_long_t; 62 typedef s64 compat_s64; 63 typedef u16 compat_ushort_t; 64 typedef u32 compat_uint_t; 65 typedef u32 compat_ulong_t; 66 typedef u64 compat_u64; 67 typedef u32 compat_uptr_t; 68 69 struct compat_timespec { 70 compat_time_t tv_sec; 71 s32 tv_nsec; 72 }; 73 74 struct compat_timeval { 75 compat_time_t tv_sec; 76 s32 tv_usec; 77 }; 78 79 struct compat_stat { 80 #ifdef __AARCH64EB__ 81 short st_dev; 82 short __pad1; 83 #else 84 compat_dev_t st_dev; 85 #endif 86 compat_ino_t st_ino; 87 compat_mode_t st_mode; 88 compat_ushort_t st_nlink; 89 __compat_uid16_t st_uid; 90 __compat_gid16_t st_gid; 91 #ifdef __AARCH64EB__ 92 short st_rdev; 93 short __pad2; 94 #else 95 compat_dev_t st_rdev; 96 #endif 97 compat_off_t st_size; 98 compat_off_t st_blksize; 99 compat_off_t st_blocks; 100 compat_time_t st_atime; 101 compat_ulong_t st_atime_nsec; 102 compat_time_t st_mtime; 103 compat_ulong_t st_mtime_nsec; 104 compat_time_t st_ctime; 105 compat_ulong_t st_ctime_nsec; 106 compat_ulong_t __unused4[2]; 107 }; 108 109 struct compat_flock { 110 short l_type; 111 short l_whence; 112 compat_off_t l_start; 113 compat_off_t l_len; 114 compat_pid_t l_pid; 115 }; 116 117 #define F_GETLK64 12 /* using 'struct flock64' */ 118 #define F_SETLK64 13 119 #define F_SETLKW64 14 120 121 struct compat_flock64 { 122 short l_type; 123 short l_whence; 124 compat_loff_t l_start; 125 compat_loff_t l_len; 126 compat_pid_t l_pid; 127 }; 128 129 struct compat_statfs { 130 int f_type; 131 int f_bsize; 132 int f_blocks; 133 int f_bfree; 134 int f_bavail; 135 int f_files; 136 int f_ffree; 137 compat_fsid_t f_fsid; 138 int f_namelen; /* SunOS ignores this field. */ 139 int f_frsize; 140 int f_flags; 141 int f_spare[4]; 142 }; 143 144 #define COMPAT_RLIM_INFINITY 0xffffffff 145 146 typedef u32 compat_old_sigset_t; 147 148 #define _COMPAT_NSIG 64 149 #define _COMPAT_NSIG_BPW 32 150 151 typedef u32 compat_sigset_word; 152 153 typedef union compat_sigval { 154 compat_int_t sival_int; 155 compat_uptr_t sival_ptr; 156 } compat_sigval_t; 157 158 typedef struct compat_siginfo { 159 int si_signo; 160 int si_errno; 161 int si_code; 162 163 union { 164 int _pad[128/sizeof(int) - 3]; 165 166 /* kill() */ 167 struct { 168 compat_pid_t _pid; /* sender's pid */ 169 __compat_uid32_t _uid; /* sender's uid */ 170 } _kill; 171 172 /* POSIX.1b timers */ 173 struct { 174 compat_timer_t _tid; /* timer id */ 175 int _overrun; /* overrun count */ 176 compat_sigval_t _sigval; /* same as below */ 177 } _timer; 178 179 /* POSIX.1b signals */ 180 struct { 181 compat_pid_t _pid; /* sender's pid */ 182 __compat_uid32_t _uid; /* sender's uid */ 183 compat_sigval_t _sigval; 184 } _rt; 185 186 /* SIGCHLD */ 187 struct { 188 compat_pid_t _pid; /* which child */ 189 __compat_uid32_t _uid; /* sender's uid */ 190 int _status; /* exit code */ 191 compat_clock_t _utime; 192 compat_clock_t _stime; 193 } _sigchld; 194 195 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ 196 struct { 197 compat_uptr_t _addr; /* faulting insn/memory ref. */ 198 short _addr_lsb; /* LSB of the reported address */ 199 } _sigfault; 200 201 /* SIGPOLL */ 202 struct { 203 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 204 int _fd; 205 } _sigpoll; 206 207 /* SIGSYS */ 208 struct { 209 compat_uptr_t _call_addr; /* calling user insn */ 210 int _syscall; /* triggering system call number */ 211 compat_uint_t _arch; /* AUDIT_ARCH_* of syscall */ 212 } _sigsys; 213 } _sifields; 214 } compat_siginfo_t; 215 216 #define COMPAT_OFF_T_MAX 0x7fffffff 217 218 /* 219 * A pointer passed in from user mode. This should not 220 * be used for syscall parameters, just declare them 221 * as pointers because the syscall entry code will have 222 * appropriately converted them already. 223 */ 224 225 static inline void __user *compat_ptr(compat_uptr_t uptr) 226 { 227 return (void __user *)(unsigned long)uptr; 228 } 229 230 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 231 { 232 return (u32)(unsigned long)uptr; 233 } 234 235 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current))) 236 237 static inline void __user *arch_compat_alloc_user_space(long len) 238 { 239 return (void __user *)compat_user_stack_pointer() - len; 240 } 241 242 struct compat_ipc64_perm { 243 compat_key_t key; 244 __compat_uid32_t uid; 245 __compat_gid32_t gid; 246 __compat_uid32_t cuid; 247 __compat_gid32_t cgid; 248 unsigned short mode; 249 unsigned short __pad1; 250 unsigned short seq; 251 unsigned short __pad2; 252 compat_ulong_t unused1; 253 compat_ulong_t unused2; 254 }; 255 256 struct compat_semid64_ds { 257 struct compat_ipc64_perm sem_perm; 258 compat_time_t sem_otime; 259 compat_ulong_t __unused1; 260 compat_time_t sem_ctime; 261 compat_ulong_t __unused2; 262 compat_ulong_t sem_nsems; 263 compat_ulong_t __unused3; 264 compat_ulong_t __unused4; 265 }; 266 267 struct compat_msqid64_ds { 268 struct compat_ipc64_perm msg_perm; 269 compat_time_t msg_stime; 270 compat_ulong_t __unused1; 271 compat_time_t msg_rtime; 272 compat_ulong_t __unused2; 273 compat_time_t msg_ctime; 274 compat_ulong_t __unused3; 275 compat_ulong_t msg_cbytes; 276 compat_ulong_t msg_qnum; 277 compat_ulong_t msg_qbytes; 278 compat_pid_t msg_lspid; 279 compat_pid_t msg_lrpid; 280 compat_ulong_t __unused4; 281 compat_ulong_t __unused5; 282 }; 283 284 struct compat_shmid64_ds { 285 struct compat_ipc64_perm shm_perm; 286 compat_size_t shm_segsz; 287 compat_time_t shm_atime; 288 compat_ulong_t __unused1; 289 compat_time_t shm_dtime; 290 compat_ulong_t __unused2; 291 compat_time_t shm_ctime; 292 compat_ulong_t __unused3; 293 compat_pid_t shm_cpid; 294 compat_pid_t shm_lpid; 295 compat_ulong_t shm_nattch; 296 compat_ulong_t __unused4; 297 compat_ulong_t __unused5; 298 }; 299 300 static inline int is_compat_task(void) 301 { 302 return test_thread_flag(TIF_32BIT); 303 } 304 305 static inline int is_compat_thread(struct thread_info *thread) 306 { 307 return test_ti_thread_flag(thread, TIF_32BIT); 308 } 309 310 #else /* !CONFIG_COMPAT */ 311 312 static inline int is_compat_thread(struct thread_info *thread) 313 { 314 return 0; 315 } 316 317 #endif /* CONFIG_COMPAT */ 318 #endif /* __KERNEL__ */ 319 #endif /* __ASM_COMPAT_H */ 320