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 27 #define COMPAT_USER_HZ 100 28 #ifdef __AARCH64EB__ 29 #define COMPAT_UTS_MACHINE "armv8b\0\0" 30 #else 31 #define COMPAT_UTS_MACHINE "armv8l\0\0" 32 #endif 33 34 typedef u32 compat_size_t; 35 typedef s32 compat_ssize_t; 36 typedef s32 compat_time_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_timespec { 69 compat_time_t tv_sec; 70 s32 tv_nsec; 71 }; 72 73 struct compat_timeval { 74 compat_time_t tv_sec; 75 s32 tv_usec; 76 }; 77 78 struct compat_stat { 79 #ifdef __AARCH64EB__ 80 short st_dev; 81 short __pad1; 82 #else 83 compat_dev_t st_dev; 84 #endif 85 compat_ino_t st_ino; 86 compat_mode_t st_mode; 87 compat_ushort_t st_nlink; 88 __compat_uid16_t st_uid; 89 __compat_gid16_t st_gid; 90 #ifdef __AARCH64EB__ 91 short st_rdev; 92 short __pad2; 93 #else 94 compat_dev_t st_rdev; 95 #endif 96 compat_off_t st_size; 97 compat_off_t st_blksize; 98 compat_off_t st_blocks; 99 compat_time_t st_atime; 100 compat_ulong_t st_atime_nsec; 101 compat_time_t st_mtime; 102 compat_ulong_t st_mtime_nsec; 103 compat_time_t st_ctime; 104 compat_ulong_t st_ctime_nsec; 105 compat_ulong_t __unused4[2]; 106 }; 107 108 struct compat_flock { 109 short l_type; 110 short l_whence; 111 compat_off_t l_start; 112 compat_off_t l_len; 113 compat_pid_t l_pid; 114 }; 115 116 #define F_GETLK64 12 /* using 'struct flock64' */ 117 #define F_SETLK64 13 118 #define F_SETLKW64 14 119 120 struct compat_flock64 { 121 short l_type; 122 short l_whence; 123 compat_loff_t l_start; 124 compat_loff_t l_len; 125 compat_pid_t l_pid; 126 }; 127 128 struct compat_statfs { 129 int f_type; 130 int f_bsize; 131 int f_blocks; 132 int f_bfree; 133 int f_bavail; 134 int f_files; 135 int f_ffree; 136 compat_fsid_t f_fsid; 137 int f_namelen; /* SunOS ignores this field. */ 138 int f_frsize; 139 int f_flags; 140 int f_spare[4]; 141 }; 142 143 #define COMPAT_RLIM_INFINITY 0xffffffff 144 145 typedef u32 compat_old_sigset_t; 146 147 #define _COMPAT_NSIG 64 148 #define _COMPAT_NSIG_BPW 32 149 150 typedef u32 compat_sigset_word; 151 152 typedef union compat_sigval { 153 compat_int_t sival_int; 154 compat_uptr_t sival_ptr; 155 } compat_sigval_t; 156 157 typedef struct compat_siginfo { 158 int si_signo; 159 int si_errno; 160 int si_code; 161 162 union { 163 int _pad[128/sizeof(int) - 3]; 164 165 /* kill() */ 166 struct { 167 compat_pid_t _pid; /* sender's pid */ 168 __compat_uid32_t _uid; /* sender's uid */ 169 } _kill; 170 171 /* POSIX.1b timers */ 172 struct { 173 compat_timer_t _tid; /* timer id */ 174 int _overrun; /* overrun count */ 175 compat_sigval_t _sigval; /* same as below */ 176 int _sys_private; /* not to be passed to user */ 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 #define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL 218 219 /* 220 * A pointer passed in from user mode. This should not 221 * be used for syscall parameters, just declare them 222 * as pointers because the syscall entry code will have 223 * appropriately converted them already. 224 */ 225 226 static inline void __user *compat_ptr(compat_uptr_t uptr) 227 { 228 return (void __user *)(unsigned long)uptr; 229 } 230 231 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 232 { 233 return (u32)(unsigned long)uptr; 234 } 235 236 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current))) 237 238 static inline void __user *arch_compat_alloc_user_space(long len) 239 { 240 return (void __user *)compat_user_stack_pointer() - len; 241 } 242 243 struct compat_ipc64_perm { 244 compat_key_t key; 245 __compat_uid32_t uid; 246 __compat_gid32_t gid; 247 __compat_uid32_t cuid; 248 __compat_gid32_t cgid; 249 unsigned short mode; 250 unsigned short __pad1; 251 unsigned short seq; 252 unsigned short __pad2; 253 compat_ulong_t unused1; 254 compat_ulong_t unused2; 255 }; 256 257 struct compat_semid64_ds { 258 struct compat_ipc64_perm sem_perm; 259 compat_time_t sem_otime; 260 compat_ulong_t __unused1; 261 compat_time_t sem_ctime; 262 compat_ulong_t __unused2; 263 compat_ulong_t sem_nsems; 264 compat_ulong_t __unused3; 265 compat_ulong_t __unused4; 266 }; 267 268 struct compat_msqid64_ds { 269 struct compat_ipc64_perm msg_perm; 270 compat_time_t msg_stime; 271 compat_ulong_t __unused1; 272 compat_time_t msg_rtime; 273 compat_ulong_t __unused2; 274 compat_time_t msg_ctime; 275 compat_ulong_t __unused3; 276 compat_ulong_t msg_cbytes; 277 compat_ulong_t msg_qnum; 278 compat_ulong_t msg_qbytes; 279 compat_pid_t msg_lspid; 280 compat_pid_t msg_lrpid; 281 compat_ulong_t __unused4; 282 compat_ulong_t __unused5; 283 }; 284 285 struct compat_shmid64_ds { 286 struct compat_ipc64_perm shm_perm; 287 compat_size_t shm_segsz; 288 compat_time_t shm_atime; 289 compat_ulong_t __unused1; 290 compat_time_t shm_dtime; 291 compat_ulong_t __unused2; 292 compat_time_t shm_ctime; 293 compat_ulong_t __unused3; 294 compat_pid_t shm_cpid; 295 compat_pid_t shm_lpid; 296 compat_ulong_t shm_nattch; 297 compat_ulong_t __unused4; 298 compat_ulong_t __unused5; 299 }; 300 301 static inline int is_compat_task(void) 302 { 303 return test_thread_flag(TIF_32BIT); 304 } 305 306 static inline int is_compat_thread(struct thread_info *thread) 307 { 308 return test_ti_thread_flag(thread, TIF_32BIT); 309 } 310 311 #else /* !CONFIG_COMPAT */ 312 313 static inline int is_compat_thread(struct thread_info *thread) 314 { 315 return 0; 316 } 317 318 #endif /* CONFIG_COMPAT */ 319 #endif /* __KERNEL__ */ 320 #endif /* __ASM_COMPAT_H */ 321