1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_COMPAT_H 3 #define _ASM_COMPAT_H 4 /* 5 * Architecture specific compatibility types 6 */ 7 #include <linux/thread_info.h> 8 #include <linux/types.h> 9 #include <asm/page.h> 10 #include <asm/ptrace.h> 11 12 #define COMPAT_USER_HZ 100 13 #define COMPAT_UTS_MACHINE "mips\0\0\0" 14 15 typedef u32 compat_size_t; 16 typedef s32 compat_ssize_t; 17 typedef s32 compat_time_t; 18 typedef s32 compat_clock_t; 19 typedef s32 compat_suseconds_t; 20 21 typedef s32 compat_pid_t; 22 typedef s32 __compat_uid_t; 23 typedef s32 __compat_gid_t; 24 typedef __compat_uid_t __compat_uid32_t; 25 typedef __compat_gid_t __compat_gid32_t; 26 typedef u32 compat_mode_t; 27 typedef u32 compat_ino_t; 28 typedef u32 compat_dev_t; 29 typedef s32 compat_off_t; 30 typedef s64 compat_loff_t; 31 typedef u32 compat_nlink_t; 32 typedef s32 compat_ipc_pid_t; 33 typedef s32 compat_daddr_t; 34 typedef s32 compat_caddr_t; 35 typedef struct { 36 s32 val[2]; 37 } compat_fsid_t; 38 typedef s32 compat_timer_t; 39 typedef s32 compat_key_t; 40 41 typedef s32 compat_int_t; 42 typedef s32 compat_long_t; 43 typedef s64 compat_s64; 44 typedef u32 compat_uint_t; 45 typedef u32 compat_ulong_t; 46 typedef u64 compat_u64; 47 typedef u32 compat_uptr_t; 48 49 struct compat_timespec { 50 compat_time_t tv_sec; 51 s32 tv_nsec; 52 }; 53 54 struct compat_timeval { 55 compat_time_t tv_sec; 56 s32 tv_usec; 57 }; 58 59 struct compat_stat { 60 compat_dev_t st_dev; 61 s32 st_pad1[3]; 62 compat_ino_t st_ino; 63 compat_mode_t st_mode; 64 compat_nlink_t st_nlink; 65 __compat_uid_t st_uid; 66 __compat_gid_t st_gid; 67 compat_dev_t st_rdev; 68 s32 st_pad2[2]; 69 compat_off_t st_size; 70 s32 st_pad3; 71 compat_time_t st_atime; 72 s32 st_atime_nsec; 73 compat_time_t st_mtime; 74 s32 st_mtime_nsec; 75 compat_time_t st_ctime; 76 s32 st_ctime_nsec; 77 s32 st_blksize; 78 s32 st_blocks; 79 s32 st_pad4[14]; 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 s32 l_sysid; 88 compat_pid_t l_pid; 89 short __unused; 90 s32 pad[4]; 91 }; 92 93 #define F_GETLK64 33 94 #define F_SETLK64 34 95 #define F_SETLKW64 35 96 97 struct compat_flock64 { 98 short l_type; 99 short l_whence; 100 compat_loff_t l_start; 101 compat_loff_t l_len; 102 compat_pid_t l_pid; 103 }; 104 105 struct compat_statfs { 106 int f_type; 107 int f_bsize; 108 int f_frsize; 109 int f_blocks; 110 int f_bfree; 111 int f_files; 112 int f_ffree; 113 int f_bavail; 114 compat_fsid_t f_fsid; 115 int f_namelen; 116 int f_flags; 117 int f_spare[5]; 118 }; 119 120 #define COMPAT_RLIM_INFINITY 0x7fffffffUL 121 122 typedef u32 compat_old_sigset_t; /* at least 32 bits */ 123 124 #define _COMPAT_NSIG 128 /* Don't ask !$@#% ... */ 125 #define _COMPAT_NSIG_BPW 32 126 127 typedef u32 compat_sigset_word; 128 129 typedef union compat_sigval { 130 compat_int_t sival_int; 131 compat_uptr_t sival_ptr; 132 } compat_sigval_t; 133 134 /* Can't use the generic version because si_code and si_errno are swapped */ 135 136 #define SI_PAD_SIZE32 (128/sizeof(int) - 3) 137 138 typedef struct compat_siginfo { 139 int si_signo; 140 int si_code; 141 int si_errno; 142 143 union { 144 int _pad[128 / sizeof(int) - 3]; 145 146 /* kill() */ 147 struct { 148 compat_pid_t _pid; /* sender's pid */ 149 __compat_uid32_t _uid; /* sender's uid */ 150 } _kill; 151 152 /* POSIX.1b timers */ 153 struct { 154 compat_timer_t _tid; /* timer id */ 155 int _overrun; /* overrun count */ 156 compat_sigval_t _sigval; /* same as below */ 157 } _timer; 158 159 /* POSIX.1b signals */ 160 struct { 161 compat_pid_t _pid; /* sender's pid */ 162 __compat_uid32_t _uid; /* sender's uid */ 163 compat_sigval_t _sigval; 164 } _rt; 165 166 /* SIGCHLD */ 167 struct { 168 compat_pid_t _pid; /* which child */ 169 __compat_uid32_t _uid; /* sender's uid */ 170 int _status; /* exit code */ 171 compat_clock_t _utime; 172 compat_clock_t _stime; 173 } _sigchld; 174 175 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ 176 struct { 177 compat_uptr_t _addr; /* faulting insn/memory ref. */ 178 #ifdef __ARCH_SI_TRAPNO 179 int _trapno; /* TRAP # which caused the signal */ 180 #endif 181 short _addr_lsb; /* LSB of the reported address */ 182 struct { 183 compat_uptr_t _lower; 184 compat_uptr_t _upper; 185 } _addr_bnd; 186 } _sigfault; 187 188 /* SIGPOLL */ 189 struct { 190 compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 191 int _fd; 192 } _sigpoll; 193 194 struct { 195 compat_uptr_t _call_addr; /* calling insn */ 196 int _syscall; /* triggering system call number */ 197 compat_uint_t _arch; /* AUDIT_ARCH_* of syscall */ 198 } _sigsys; 199 } _sifields; 200 } compat_siginfo_t; 201 202 #define COMPAT_OFF_T_MAX 0x7fffffff 203 204 /* 205 * A pointer passed in from user mode. This should not 206 * be used for syscall parameters, just declare them 207 * as pointers because the syscall entry code will have 208 * appropriately converted them already. 209 */ 210 211 static inline void __user *compat_ptr(compat_uptr_t uptr) 212 { 213 /* cast to a __user pointer via "unsigned long" makes sparse happy */ 214 return (void __user *)(unsigned long)(long)uptr; 215 } 216 217 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 218 { 219 return (u32)(unsigned long)uptr; 220 } 221 222 static inline void __user *arch_compat_alloc_user_space(long len) 223 { 224 struct pt_regs *regs = (struct pt_regs *) 225 ((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1; 226 227 return (void __user *) (regs->regs[29] - len); 228 } 229 230 struct compat_ipc64_perm { 231 compat_key_t key; 232 __compat_uid32_t uid; 233 __compat_gid32_t gid; 234 __compat_uid32_t cuid; 235 __compat_gid32_t cgid; 236 compat_mode_t mode; 237 unsigned short seq; 238 unsigned short __pad2; 239 compat_ulong_t __unused1; 240 compat_ulong_t __unused2; 241 }; 242 243 struct compat_semid64_ds { 244 struct compat_ipc64_perm sem_perm; 245 compat_time_t sem_otime; 246 compat_time_t sem_ctime; 247 compat_ulong_t sem_nsems; 248 compat_ulong_t __unused1; 249 compat_ulong_t __unused2; 250 }; 251 252 struct compat_msqid64_ds { 253 struct compat_ipc64_perm msg_perm; 254 #ifndef CONFIG_CPU_LITTLE_ENDIAN 255 compat_ulong_t __unused1; 256 #endif 257 compat_time_t msg_stime; 258 #ifdef CONFIG_CPU_LITTLE_ENDIAN 259 compat_ulong_t __unused1; 260 #endif 261 #ifndef CONFIG_CPU_LITTLE_ENDIAN 262 compat_ulong_t __unused2; 263 #endif 264 compat_time_t msg_rtime; 265 #ifdef CONFIG_CPU_LITTLE_ENDIAN 266 compat_ulong_t __unused2; 267 #endif 268 #ifndef CONFIG_CPU_LITTLE_ENDIAN 269 compat_ulong_t __unused3; 270 #endif 271 compat_time_t msg_ctime; 272 #ifdef CONFIG_CPU_LITTLE_ENDIAN 273 compat_ulong_t __unused3; 274 #endif 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_time_t shm_dtime; 289 compat_time_t shm_ctime; 290 compat_pid_t shm_cpid; 291 compat_pid_t shm_lpid; 292 compat_ulong_t shm_nattch; 293 compat_ulong_t __unused1; 294 compat_ulong_t __unused2; 295 }; 296 297 /* MIPS has unusual order of fields in stack_t */ 298 typedef struct compat_sigaltstack { 299 compat_uptr_t ss_sp; 300 compat_size_t ss_size; 301 int ss_flags; 302 } compat_stack_t; 303 #define compat_sigaltstack compat_sigaltstack 304 305 static inline int is_compat_task(void) 306 { 307 return test_thread_flag(TIF_32BIT_ADDR); 308 } 309 310 #endif /* _ASM_COMPAT_H */ 311