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/ptrace.h> 27 28 #define COMPAT_USER_HZ 100 29 #define COMPAT_UTS_MACHINE "armv8l\0\0" 30 31 typedef u32 compat_size_t; 32 typedef s32 compat_ssize_t; 33 typedef s32 compat_time_t; 34 typedef s32 compat_clock_t; 35 typedef s32 compat_pid_t; 36 typedef u32 __compat_uid_t; 37 typedef u32 __compat_gid_t; 38 typedef u32 __compat_uid32_t; 39 typedef u32 __compat_gid32_t; 40 typedef u32 compat_mode_t; 41 typedef u32 compat_ino_t; 42 typedef u32 compat_dev_t; 43 typedef s32 compat_off_t; 44 typedef s64 compat_loff_t; 45 typedef s16 compat_nlink_t; 46 typedef u16 compat_ipc_pid_t; 47 typedef s32 compat_daddr_t; 48 typedef u32 compat_caddr_t; 49 typedef __kernel_fsid_t compat_fsid_t; 50 typedef s32 compat_key_t; 51 typedef s32 compat_timer_t; 52 53 typedef s32 compat_int_t; 54 typedef s32 compat_long_t; 55 typedef s64 compat_s64; 56 typedef u32 compat_uint_t; 57 typedef u32 compat_ulong_t; 58 typedef u64 compat_u64; 59 typedef u32 compat_uptr_t; 60 61 struct compat_timespec { 62 compat_time_t tv_sec; 63 s32 tv_nsec; 64 }; 65 66 struct compat_timeval { 67 compat_time_t tv_sec; 68 s32 tv_usec; 69 }; 70 71 struct compat_stat { 72 compat_dev_t st_dev; 73 compat_ino_t st_ino; 74 compat_mode_t st_mode; 75 compat_nlink_t st_nlink; 76 __compat_uid32_t st_uid; 77 __compat_gid32_t st_gid; 78 compat_dev_t st_rdev; 79 compat_off_t st_size; 80 compat_off_t st_blksize; 81 compat_off_t st_blocks; 82 compat_time_t st_atime; 83 u32 st_atime_nsec; 84 compat_time_t st_mtime; 85 u32 st_mtime_nsec; 86 compat_time_t st_ctime; 87 u32 st_ctime_nsec; 88 u32 __unused4[2]; 89 }; 90 91 struct compat_flock { 92 short l_type; 93 short l_whence; 94 compat_off_t l_start; 95 compat_off_t l_len; 96 compat_pid_t l_pid; 97 }; 98 99 #define F_GETLK64 12 /* using 'struct flock64' */ 100 #define F_SETLK64 13 101 #define F_SETLKW64 14 102 103 struct compat_flock64 { 104 short l_type; 105 short l_whence; 106 compat_loff_t l_start; 107 compat_loff_t l_len; 108 compat_pid_t l_pid; 109 }; 110 111 struct compat_statfs { 112 int f_type; 113 int f_bsize; 114 int f_blocks; 115 int f_bfree; 116 int f_bavail; 117 int f_files; 118 int f_ffree; 119 compat_fsid_t f_fsid; 120 int f_namelen; /* SunOS ignores this field. */ 121 int f_frsize; 122 int f_flags; 123 int f_spare[4]; 124 }; 125 126 #define COMPAT_RLIM_INFINITY 0xffffffff 127 128 typedef u32 compat_old_sigset_t; 129 130 #define _COMPAT_NSIG 64 131 #define _COMPAT_NSIG_BPW 32 132 133 typedef u32 compat_sigset_word; 134 135 typedef union compat_sigval { 136 compat_int_t sival_int; 137 compat_uptr_t sival_ptr; 138 } compat_sigval_t; 139 140 typedef struct compat_siginfo { 141 int si_signo; 142 int si_errno; 143 int si_code; 144 145 union { 146 /* The padding is the same size as AArch64. */ 147 int _pad[128/sizeof(int) - 3]; 148 149 /* kill() */ 150 struct { 151 compat_pid_t _pid; /* sender's pid */ 152 __compat_uid32_t _uid; /* sender's uid */ 153 } _kill; 154 155 /* POSIX.1b timers */ 156 struct { 157 compat_timer_t _tid; /* timer id */ 158 int _overrun; /* overrun count */ 159 compat_sigval_t _sigval; /* same as below */ 160 int _sys_private; /* not to be passed to user */ 161 } _timer; 162 163 /* POSIX.1b signals */ 164 struct { 165 compat_pid_t _pid; /* sender's pid */ 166 __compat_uid32_t _uid; /* sender's uid */ 167 compat_sigval_t _sigval; 168 } _rt; 169 170 /* SIGCHLD */ 171 struct { 172 compat_pid_t _pid; /* which child */ 173 __compat_uid32_t _uid; /* sender's uid */ 174 int _status; /* exit code */ 175 compat_clock_t _utime; 176 compat_clock_t _stime; 177 } _sigchld; 178 179 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ 180 struct { 181 compat_uptr_t _addr; /* faulting insn/memory ref. */ 182 short _addr_lsb; /* LSB of the reported address */ 183 } _sigfault; 184 185 /* SIGPOLL */ 186 struct { 187 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 188 int _fd; 189 } _sigpoll; 190 } _sifields; 191 } compat_siginfo_t; 192 193 #define COMPAT_OFF_T_MAX 0x7fffffff 194 #define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL 195 196 /* 197 * A pointer passed in from user mode. This should not 198 * be used for syscall parameters, just declare them 199 * as pointers because the syscall entry code will have 200 * appropriately converted them already. 201 */ 202 203 static inline void __user *compat_ptr(compat_uptr_t uptr) 204 { 205 return (void __user *)(unsigned long)uptr; 206 } 207 208 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 209 { 210 return (u32)(unsigned long)uptr; 211 } 212 213 #define compat_user_stack_pointer() (current_pt_regs()->compat_sp) 214 215 static inline void __user *arch_compat_alloc_user_space(long len) 216 { 217 return (void __user *)compat_user_stack_pointer() - len; 218 } 219 220 struct compat_ipc64_perm { 221 compat_key_t key; 222 __compat_uid32_t uid; 223 __compat_gid32_t gid; 224 __compat_uid32_t cuid; 225 __compat_gid32_t cgid; 226 unsigned short mode; 227 unsigned short __pad1; 228 unsigned short seq; 229 unsigned short __pad2; 230 compat_ulong_t unused1; 231 compat_ulong_t unused2; 232 }; 233 234 struct compat_semid64_ds { 235 struct compat_ipc64_perm sem_perm; 236 compat_time_t sem_otime; 237 compat_ulong_t __unused1; 238 compat_time_t sem_ctime; 239 compat_ulong_t __unused2; 240 compat_ulong_t sem_nsems; 241 compat_ulong_t __unused3; 242 compat_ulong_t __unused4; 243 }; 244 245 struct compat_msqid64_ds { 246 struct compat_ipc64_perm msg_perm; 247 compat_time_t msg_stime; 248 compat_ulong_t __unused1; 249 compat_time_t msg_rtime; 250 compat_ulong_t __unused2; 251 compat_time_t msg_ctime; 252 compat_ulong_t __unused3; 253 compat_ulong_t msg_cbytes; 254 compat_ulong_t msg_qnum; 255 compat_ulong_t msg_qbytes; 256 compat_pid_t msg_lspid; 257 compat_pid_t msg_lrpid; 258 compat_ulong_t __unused4; 259 compat_ulong_t __unused5; 260 }; 261 262 struct compat_shmid64_ds { 263 struct compat_ipc64_perm shm_perm; 264 compat_size_t shm_segsz; 265 compat_time_t shm_atime; 266 compat_ulong_t __unused1; 267 compat_time_t shm_dtime; 268 compat_ulong_t __unused2; 269 compat_time_t shm_ctime; 270 compat_ulong_t __unused3; 271 compat_pid_t shm_cpid; 272 compat_pid_t shm_lpid; 273 compat_ulong_t shm_nattch; 274 compat_ulong_t __unused4; 275 compat_ulong_t __unused5; 276 }; 277 278 static inline int is_compat_task(void) 279 { 280 return test_thread_flag(TIF_32BIT); 281 } 282 283 static inline int is_compat_thread(struct thread_info *thread) 284 { 285 return test_ti_thread_flag(thread, TIF_32BIT); 286 } 287 288 #else /* !CONFIG_COMPAT */ 289 290 static inline int is_compat_task(void) 291 { 292 return 0; 293 } 294 295 static inline int is_compat_thread(struct thread_info *thread) 296 { 297 return 0; 298 } 299 300 #endif /* CONFIG_COMPAT */ 301 #endif /* __KERNEL__ */ 302 #endif /* __ASM_COMPAT_H */ 303