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#ifdef __AARCH64EB__ 30#define COMPAT_UTS_MACHINE "armv8b\0\0" 31#else 32#define COMPAT_UTS_MACHINE "armv8l\0\0" 33#endif 34 35typedef u32 compat_size_t; 36typedef s32 compat_ssize_t; 37typedef s32 compat_time_t; 38typedef s32 compat_clock_t; 39typedef s32 compat_pid_t; 40typedef u16 __compat_uid_t; 41typedef u16 __compat_gid_t; 42typedef u16 __compat_uid16_t; 43typedef u16 __compat_gid16_t; 44typedef u32 __compat_uid32_t; 45typedef u32 __compat_gid32_t; 46typedef u16 compat_mode_t; 47typedef u32 compat_ino_t; 48typedef u32 compat_dev_t; 49typedef s32 compat_off_t; 50typedef s64 compat_loff_t; 51typedef s32 compat_nlink_t; 52typedef u16 compat_ipc_pid_t; 53typedef s32 compat_daddr_t; 54typedef u32 compat_caddr_t; 55typedef __kernel_fsid_t compat_fsid_t; 56typedef s32 compat_key_t; 57typedef s32 compat_timer_t; 58 59typedef s16 compat_short_t; 60typedef s32 compat_int_t; 61typedef s32 compat_long_t; 62typedef s64 compat_s64; 63typedef u16 compat_ushort_t; 64typedef u32 compat_uint_t; 65typedef u32 compat_ulong_t; 66typedef u64 compat_u64; 67typedef u32 compat_uptr_t; 68 69struct compat_timespec { 70 compat_time_t tv_sec; 71 s32 tv_nsec; 72}; 73 74struct compat_timeval { 75 compat_time_t tv_sec; 76 s32 tv_usec; 77}; 78 79struct 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 109struct 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 121struct 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 129struct 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 146typedef u32 compat_old_sigset_t; 147 148#define _COMPAT_NSIG 64 149#define _COMPAT_NSIG_BPW 32 150 151typedef u32 compat_sigset_word; 152 153typedef union compat_sigval { 154 compat_int_t sival_int; 155 compat_uptr_t sival_ptr; 156} compat_sigval_t; 157 158typedef 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 int _sys_private; /* not to be passed to user */ 178 } _timer; 179 180 /* POSIX.1b signals */ 181 struct { 182 compat_pid_t _pid; /* sender's pid */ 183 __compat_uid32_t _uid; /* sender's uid */ 184 compat_sigval_t _sigval; 185 } _rt; 186 187 /* SIGCHLD */ 188 struct { 189 compat_pid_t _pid; /* which child */ 190 __compat_uid32_t _uid; /* sender's uid */ 191 int _status; /* exit code */ 192 compat_clock_t _utime; 193 compat_clock_t _stime; 194 } _sigchld; 195 196 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ 197 struct { 198 compat_uptr_t _addr; /* faulting insn/memory ref. */ 199 short _addr_lsb; /* LSB of the reported address */ 200 } _sigfault; 201 202 /* SIGPOLL */ 203 struct { 204 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 205 int _fd; 206 } _sigpoll; 207 208 /* SIGSYS */ 209 struct { 210 compat_uptr_t _call_addr; /* calling user insn */ 211 int _syscall; /* triggering system call number */ 212 compat_uint_t _arch; /* AUDIT_ARCH_* of syscall */ 213 } _sigsys; 214 } _sifields; 215} compat_siginfo_t; 216 217#define COMPAT_OFF_T_MAX 0x7fffffff 218#define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL 219 220/* 221 * A pointer passed in from user mode. This should not 222 * be used for syscall parameters, just declare them 223 * as pointers because the syscall entry code will have 224 * appropriately converted them already. 225 */ 226 227static inline void __user *compat_ptr(compat_uptr_t uptr) 228{ 229 return (void __user *)(unsigned long)uptr; 230} 231 232static inline compat_uptr_t ptr_to_compat(void __user *uptr) 233{ 234 return (u32)(unsigned long)uptr; 235} 236 237#define compat_user_stack_pointer() (user_stack_pointer(current_pt_regs())) 238 239static inline void __user *arch_compat_alloc_user_space(long len) 240{ 241 return (void __user *)compat_user_stack_pointer() - len; 242} 243 244struct compat_ipc64_perm { 245 compat_key_t key; 246 __compat_uid32_t uid; 247 __compat_gid32_t gid; 248 __compat_uid32_t cuid; 249 __compat_gid32_t cgid; 250 unsigned short mode; 251 unsigned short __pad1; 252 unsigned short seq; 253 unsigned short __pad2; 254 compat_ulong_t unused1; 255 compat_ulong_t unused2; 256}; 257 258struct compat_semid64_ds { 259 struct compat_ipc64_perm sem_perm; 260 compat_time_t sem_otime; 261 compat_ulong_t __unused1; 262 compat_time_t sem_ctime; 263 compat_ulong_t __unused2; 264 compat_ulong_t sem_nsems; 265 compat_ulong_t __unused3; 266 compat_ulong_t __unused4; 267}; 268 269struct compat_msqid64_ds { 270 struct compat_ipc64_perm msg_perm; 271 compat_time_t msg_stime; 272 compat_ulong_t __unused1; 273 compat_time_t msg_rtime; 274 compat_ulong_t __unused2; 275 compat_time_t msg_ctime; 276 compat_ulong_t __unused3; 277 compat_ulong_t msg_cbytes; 278 compat_ulong_t msg_qnum; 279 compat_ulong_t msg_qbytes; 280 compat_pid_t msg_lspid; 281 compat_pid_t msg_lrpid; 282 compat_ulong_t __unused4; 283 compat_ulong_t __unused5; 284}; 285 286struct compat_shmid64_ds { 287 struct compat_ipc64_perm shm_perm; 288 compat_size_t shm_segsz; 289 compat_time_t shm_atime; 290 compat_ulong_t __unused1; 291 compat_time_t shm_dtime; 292 compat_ulong_t __unused2; 293 compat_time_t shm_ctime; 294 compat_ulong_t __unused3; 295 compat_pid_t shm_cpid; 296 compat_pid_t shm_lpid; 297 compat_ulong_t shm_nattch; 298 compat_ulong_t __unused4; 299 compat_ulong_t __unused5; 300}; 301 302static inline int is_compat_task(void) 303{ 304 return test_thread_flag(TIF_32BIT); 305} 306 307static inline int is_compat_thread(struct thread_info *thread) 308{ 309 return test_ti_thread_flag(thread, TIF_32BIT); 310} 311 312#else /* !CONFIG_COMPAT */ 313 314static inline int is_compat_thread(struct thread_info *thread) 315{ 316 return 0; 317} 318 319#endif /* CONFIG_COMPAT */ 320#endif /* __KERNEL__ */ 321#endif /* __ASM_COMPAT_H */ 322