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 u64 __attribute__((aligned(4))) compat_u64; 44 typedef u32 compat_uptr_t; 45 46 struct compat_timespec { 47 compat_time_t tv_sec; 48 s32 tv_nsec; 49 }; 50 51 struct compat_timeval { 52 compat_time_t tv_sec; 53 s32 tv_usec; 54 }; 55 56 struct compat_stat { 57 compat_dev_t st_dev; 58 u16 __pad1; 59 compat_ino_t st_ino; 60 compat_mode_t st_mode; 61 compat_nlink_t st_nlink; 62 __compat_uid_t st_uid; 63 __compat_gid_t st_gid; 64 compat_dev_t st_rdev; 65 u16 __pad2; 66 u32 st_size; 67 u32 st_blksize; 68 u32 st_blocks; 69 u32 st_atime; 70 u32 st_atime_nsec; 71 u32 st_mtime; 72 u32 st_mtime_nsec; 73 u32 st_ctime; 74 u32 st_ctime_nsec; 75 u32 __unused4; 76 u32 __unused5; 77 }; 78 79 struct compat_flock { 80 short l_type; 81 short l_whence; 82 compat_off_t l_start; 83 compat_off_t l_len; 84 compat_pid_t l_pid; 85 }; 86 87 #define F_GETLK64 12 /* using 'struct flock64' */ 88 #define F_SETLK64 13 89 #define F_SETLKW64 14 90 91 /* 92 * IA32 uses 4 byte alignment for 64 bit quantities, 93 * so we need to pack this structure. 94 */ 95 struct compat_flock64 { 96 short l_type; 97 short l_whence; 98 compat_loff_t l_start; 99 compat_loff_t l_len; 100 compat_pid_t l_pid; 101 } __attribute__((packed)); 102 103 struct compat_statfs { 104 int f_type; 105 int f_bsize; 106 int f_blocks; 107 int f_bfree; 108 int f_bavail; 109 int f_files; 110 int f_ffree; 111 compat_fsid_t f_fsid; 112 int f_namelen; /* SunOS ignores this field. */ 113 int f_frsize; 114 int f_flags; 115 int f_spare[4]; 116 }; 117 118 #define COMPAT_RLIM_OLD_INFINITY 0x7fffffff 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 } _sigfault; 185 186 /* SIGPOLL */ 187 struct { 188 int _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 189 int _fd; 190 } _sigpoll; 191 192 struct { 193 unsigned int _call_addr; /* calling insn */ 194 int _syscall; /* triggering system call number */ 195 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 196 } _sigsys; 197 } _sifields; 198 } compat_siginfo_t; 199 200 #define COMPAT_OFF_T_MAX 0x7fffffff 201 #define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL 202 203 struct compat_ipc64_perm { 204 compat_key_t key; 205 __compat_uid32_t uid; 206 __compat_gid32_t gid; 207 __compat_uid32_t cuid; 208 __compat_gid32_t cgid; 209 unsigned short mode; 210 unsigned short __pad1; 211 unsigned short seq; 212 unsigned short __pad2; 213 compat_ulong_t unused1; 214 compat_ulong_t unused2; 215 }; 216 217 struct compat_semid64_ds { 218 struct compat_ipc64_perm sem_perm; 219 compat_time_t sem_otime; 220 compat_ulong_t __unused1; 221 compat_time_t sem_ctime; 222 compat_ulong_t __unused2; 223 compat_ulong_t sem_nsems; 224 compat_ulong_t __unused3; 225 compat_ulong_t __unused4; 226 }; 227 228 struct compat_msqid64_ds { 229 struct compat_ipc64_perm msg_perm; 230 compat_time_t msg_stime; 231 compat_ulong_t __unused1; 232 compat_time_t msg_rtime; 233 compat_ulong_t __unused2; 234 compat_time_t msg_ctime; 235 compat_ulong_t __unused3; 236 compat_ulong_t msg_cbytes; 237 compat_ulong_t msg_qnum; 238 compat_ulong_t msg_qbytes; 239 compat_pid_t msg_lspid; 240 compat_pid_t msg_lrpid; 241 compat_ulong_t __unused4; 242 compat_ulong_t __unused5; 243 }; 244 245 struct compat_shmid64_ds { 246 struct compat_ipc64_perm shm_perm; 247 compat_size_t shm_segsz; 248 compat_time_t shm_atime; 249 compat_ulong_t __unused1; 250 compat_time_t shm_dtime; 251 compat_ulong_t __unused2; 252 compat_time_t shm_ctime; 253 compat_ulong_t __unused3; 254 compat_pid_t shm_cpid; 255 compat_pid_t shm_lpid; 256 compat_ulong_t shm_nattch; 257 compat_ulong_t __unused4; 258 compat_ulong_t __unused5; 259 }; 260 261 /* 262 * The type of struct elf_prstatus.pr_reg in compatible core dumps. 263 */ 264 #ifdef CONFIG_X86_X32_ABI 265 typedef struct user_regs_struct compat_elf_gregset_t; 266 267 #define PR_REG_SIZE(S) (test_thread_flag(TIF_IA32) ? 68 : 216) 268 #define PRSTATUS_SIZE(S) (test_thread_flag(TIF_IA32) ? 144 : 296) 269 #define SET_PR_FPVALID(S,V) \ 270 do { *(int *) (((void *) &((S)->pr_reg)) + PR_REG_SIZE(0)) = (V); } \ 271 while (0) 272 273 #define COMPAT_USE_64BIT_TIME \ 274 (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)) 275 #else 276 typedef struct user_regs_struct32 compat_elf_gregset_t; 277 #endif 278 279 /* 280 * A pointer passed in from user mode. This should not 281 * be used for syscall parameters, just declare them 282 * as pointers because the syscall entry code will have 283 * appropriately converted them already. 284 */ 285 286 static inline void __user *compat_ptr(compat_uptr_t uptr) 287 { 288 return (void __user *)(unsigned long)uptr; 289 } 290 291 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 292 { 293 return (u32)(unsigned long)uptr; 294 } 295 296 static inline void __user *arch_compat_alloc_user_space(long len) 297 { 298 compat_uptr_t sp; 299 300 if (test_thread_flag(TIF_IA32)) { 301 sp = task_pt_regs(current)->sp; 302 } else { 303 /* -128 for the x32 ABI redzone */ 304 sp = task_pt_regs(current)->sp - 128; 305 } 306 307 return (void __user *)round_down(sp - len, 16); 308 } 309 310 static inline bool is_x32_task(void) 311 { 312 #ifdef CONFIG_X86_X32_ABI 313 if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT) 314 return true; 315 #endif 316 return false; 317 } 318 319 static inline bool is_compat_task(void) 320 { 321 return is_ia32_task() || is_x32_task(); 322 } 323 324 #endif /* _ASM_X86_COMPAT_H */ 325