1 #ifndef _ASM_X86_COMPAT_H 2 #define _ASM_X86_COMPAT_H 3 4 /* 5 * Architecture specific compatibility types 6 */ 7 #include <linux/types.h> 8 #include <linux/sched.h> 9 #include <asm/processor.h> 10 #include <asm/user32.h> 11 #include <asm/unistd.h> 12 13 #define COMPAT_USER_HZ 100 14 #define COMPAT_UTS_MACHINE "i686\0\0" 15 16 typedef u32 compat_size_t; 17 typedef s32 compat_ssize_t; 18 typedef s32 compat_time_t; 19 typedef s32 compat_clock_t; 20 typedef s32 compat_pid_t; 21 typedef u16 __compat_uid_t; 22 typedef u16 __compat_gid_t; 23 typedef u32 __compat_uid32_t; 24 typedef u32 __compat_gid32_t; 25 typedef u16 compat_mode_t; 26 typedef u32 compat_ino_t; 27 typedef u16 compat_dev_t; 28 typedef s32 compat_off_t; 29 typedef s64 compat_loff_t; 30 typedef u16 compat_nlink_t; 31 typedef u16 compat_ipc_pid_t; 32 typedef s32 compat_daddr_t; 33 typedef u32 compat_caddr_t; 34 typedef __kernel_fsid_t compat_fsid_t; 35 typedef s32 compat_timer_t; 36 typedef s32 compat_key_t; 37 38 typedef s32 compat_int_t; 39 typedef s32 compat_long_t; 40 typedef s64 __attribute__((aligned(4))) compat_s64; 41 typedef u32 compat_uint_t; 42 typedef u32 compat_ulong_t; 43 typedef u32 compat_u32; 44 typedef u64 __attribute__((aligned(4))) compat_u64; 45 typedef u32 compat_uptr_t; 46 47 struct compat_timespec { 48 compat_time_t tv_sec; 49 s32 tv_nsec; 50 }; 51 52 struct compat_timeval { 53 compat_time_t tv_sec; 54 s32 tv_usec; 55 }; 56 57 struct compat_stat { 58 compat_dev_t st_dev; 59 u16 __pad1; 60 compat_ino_t st_ino; 61 compat_mode_t st_mode; 62 compat_nlink_t st_nlink; 63 __compat_uid_t st_uid; 64 __compat_gid_t st_gid; 65 compat_dev_t st_rdev; 66 u16 __pad2; 67 u32 st_size; 68 u32 st_blksize; 69 u32 st_blocks; 70 u32 st_atime; 71 u32 st_atime_nsec; 72 u32 st_mtime; 73 u32 st_mtime_nsec; 74 u32 st_ctime; 75 u32 st_ctime_nsec; 76 u32 __unused4; 77 u32 __unused5; 78 }; 79 80 struct compat_flock { 81 short l_type; 82 short l_whence; 83 compat_off_t l_start; 84 compat_off_t l_len; 85 compat_pid_t l_pid; 86 }; 87 88 #define F_GETLK64 12 /* using 'struct flock64' */ 89 #define F_SETLK64 13 90 #define F_SETLKW64 14 91 92 /* 93 * IA32 uses 4 byte alignment for 64 bit quantities, 94 * so we need to pack this structure. 95 */ 96 struct compat_flock64 { 97 short l_type; 98 short l_whence; 99 compat_loff_t l_start; 100 compat_loff_t l_len; 101 compat_pid_t l_pid; 102 } __attribute__((packed)); 103 104 struct compat_statfs { 105 int f_type; 106 int f_bsize; 107 int f_blocks; 108 int f_bfree; 109 int f_bavail; 110 int f_files; 111 int f_ffree; 112 compat_fsid_t f_fsid; 113 int f_namelen; /* SunOS ignores this field. */ 114 int f_frsize; 115 int f_flags; 116 int f_spare[4]; 117 }; 118 119 #define COMPAT_RLIM_INFINITY 0xffffffff 120 121 typedef u32 compat_old_sigset_t; /* at least 32 bits */ 122 123 #define _COMPAT_NSIG 64 124 #define _COMPAT_NSIG_BPW 32 125 126 typedef u32 compat_sigset_word; 127 128 typedef union compat_sigval { 129 compat_int_t sival_int; 130 compat_uptr_t sival_ptr; 131 } compat_sigval_t; 132 133 typedef struct compat_siginfo { 134 int si_signo; 135 int si_errno; 136 int si_code; 137 138 union { 139 int _pad[128/sizeof(int) - 3]; 140 141 /* kill() */ 142 struct { 143 unsigned int _pid; /* sender's pid */ 144 unsigned int _uid; /* sender's uid */ 145 } _kill; 146 147 /* POSIX.1b timers */ 148 struct { 149 compat_timer_t _tid; /* timer id */ 150 int _overrun; /* overrun count */ 151 compat_sigval_t _sigval; /* same as below */ 152 int _sys_private; /* not to be passed to user */ 153 int _overrun_incr; /* amount to add to overrun */ 154 } _timer; 155 156 /* POSIX.1b signals */ 157 struct { 158 unsigned int _pid; /* sender's pid */ 159 unsigned int _uid; /* sender's uid */ 160 compat_sigval_t _sigval; 161 } _rt; 162 163 /* SIGCHLD */ 164 struct { 165 unsigned int _pid; /* which child */ 166 unsigned int _uid; /* sender's uid */ 167 int _status; /* exit code */ 168 compat_clock_t _utime; 169 compat_clock_t _stime; 170 } _sigchld; 171 172 /* SIGCHLD (x32 version) */ 173 struct { 174 unsigned int _pid; /* which child */ 175 unsigned int _uid; /* sender's uid */ 176 int _status; /* exit code */ 177 compat_s64 _utime; 178 compat_s64 _stime; 179 } _sigchld_x32; 180 181 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ 182 struct { 183 unsigned int _addr; /* faulting insn/memory ref. */ 184 short int _addr_lsb; /* Valid LSB of the reported address. */ 185 union { 186 /* used when si_code=SEGV_BNDERR */ 187 struct { 188 compat_uptr_t _lower; 189 compat_uptr_t _upper; 190 } _addr_bnd; 191 /* used when si_code=SEGV_PKUERR */ 192 compat_u32 _pkey; 193 }; 194 } _sigfault; 195 196 /* SIGPOLL */ 197 struct { 198 int _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 199 int _fd; 200 } _sigpoll; 201 202 struct { 203 unsigned int _call_addr; /* calling insn */ 204 int _syscall; /* triggering system call number */ 205 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 206 } _sigsys; 207 } _sifields; 208 } compat_siginfo_t; 209 210 #define COMPAT_OFF_T_MAX 0x7fffffff 211 #define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL 212 213 struct compat_ipc64_perm { 214 compat_key_t key; 215 __compat_uid32_t uid; 216 __compat_gid32_t gid; 217 __compat_uid32_t cuid; 218 __compat_gid32_t cgid; 219 unsigned short mode; 220 unsigned short __pad1; 221 unsigned short seq; 222 unsigned short __pad2; 223 compat_ulong_t unused1; 224 compat_ulong_t unused2; 225 }; 226 227 struct compat_semid64_ds { 228 struct compat_ipc64_perm sem_perm; 229 compat_time_t sem_otime; 230 compat_ulong_t __unused1; 231 compat_time_t sem_ctime; 232 compat_ulong_t __unused2; 233 compat_ulong_t sem_nsems; 234 compat_ulong_t __unused3; 235 compat_ulong_t __unused4; 236 }; 237 238 struct compat_msqid64_ds { 239 struct compat_ipc64_perm msg_perm; 240 compat_time_t msg_stime; 241 compat_ulong_t __unused1; 242 compat_time_t msg_rtime; 243 compat_ulong_t __unused2; 244 compat_time_t msg_ctime; 245 compat_ulong_t __unused3; 246 compat_ulong_t msg_cbytes; 247 compat_ulong_t msg_qnum; 248 compat_ulong_t msg_qbytes; 249 compat_pid_t msg_lspid; 250 compat_pid_t msg_lrpid; 251 compat_ulong_t __unused4; 252 compat_ulong_t __unused5; 253 }; 254 255 struct compat_shmid64_ds { 256 struct compat_ipc64_perm shm_perm; 257 compat_size_t shm_segsz; 258 compat_time_t shm_atime; 259 compat_ulong_t __unused1; 260 compat_time_t shm_dtime; 261 compat_ulong_t __unused2; 262 compat_time_t shm_ctime; 263 compat_ulong_t __unused3; 264 compat_pid_t shm_cpid; 265 compat_pid_t shm_lpid; 266 compat_ulong_t shm_nattch; 267 compat_ulong_t __unused4; 268 compat_ulong_t __unused5; 269 }; 270 271 /* 272 * The type of struct elf_prstatus.pr_reg in compatible core dumps. 273 */ 274 typedef struct user_regs_struct compat_elf_gregset_t; 275 276 /* Full regset -- prstatus on x32, otherwise on ia32 */ 277 #define PRSTATUS_SIZE(S, R) (R != sizeof(S.pr_reg) ? 144 : 296) 278 #define SET_PR_FPVALID(S, V, R) \ 279 do { *(int *) (((void *) &((S)->pr_reg)) + R) = (V); } \ 280 while (0) 281 282 #ifdef CONFIG_X86_X32_ABI 283 #define COMPAT_USE_64BIT_TIME \ 284 (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)) 285 #endif 286 287 /* 288 * A pointer passed in from user mode. This should not 289 * be used for syscall parameters, just declare them 290 * as pointers because the syscall entry code will have 291 * appropriately converted them already. 292 */ 293 294 static inline void __user *compat_ptr(compat_uptr_t uptr) 295 { 296 return (void __user *)(unsigned long)uptr; 297 } 298 299 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 300 { 301 return (u32)(unsigned long)uptr; 302 } 303 304 static inline void __user *arch_compat_alloc_user_space(long len) 305 { 306 compat_uptr_t sp; 307 308 if (test_thread_flag(TIF_IA32)) { 309 sp = task_pt_regs(current)->sp; 310 } else { 311 /* -128 for the x32 ABI redzone */ 312 sp = task_pt_regs(current)->sp - 128; 313 } 314 315 return (void __user *)round_down(sp - len, 16); 316 } 317 318 static inline bool in_x32_syscall(void) 319 { 320 #ifdef CONFIG_X86_X32_ABI 321 if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT) 322 return true; 323 #endif 324 return false; 325 } 326 327 static inline bool in_compat_syscall(void) 328 { 329 return in_ia32_syscall() || in_x32_syscall(); 330 } 331 #define in_compat_syscall in_compat_syscall /* override the generic impl */ 332 333 #endif /* _ASM_X86_COMPAT_H */ 334