1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_COMPAT_H 3 #define _ASM_X86_COMPAT_H 4 5 /* 6 * Architecture specific compatibility types 7 */ 8 #include <linux/types.h> 9 #include <linux/sched.h> 10 #include <asm/processor.h> 11 #include <asm/user32.h> 12 #include <asm/unistd.h> 13 14 #define COMPAT_USER_HZ 100 15 #define COMPAT_UTS_MACHINE "i686\0\0" 16 17 typedef u32 compat_size_t; 18 typedef s32 compat_ssize_t; 19 typedef s32 compat_time_t; 20 typedef s32 compat_clock_t; 21 typedef s32 compat_pid_t; 22 typedef u16 __compat_uid_t; 23 typedef u16 __compat_gid_t; 24 typedef u32 __compat_uid32_t; 25 typedef u32 __compat_gid32_t; 26 typedef u16 compat_mode_t; 27 typedef u32 compat_ino_t; 28 typedef u16 compat_dev_t; 29 typedef s32 compat_off_t; 30 typedef s64 compat_loff_t; 31 typedef u16 compat_nlink_t; 32 typedef u16 compat_ipc_pid_t; 33 typedef s32 compat_daddr_t; 34 typedef u32 compat_caddr_t; 35 typedef __kernel_fsid_t compat_fsid_t; 36 typedef s32 compat_timer_t; 37 typedef s32 compat_key_t; 38 39 typedef s32 compat_int_t; 40 typedef s32 compat_long_t; 41 typedef s64 __attribute__((aligned(4))) compat_s64; 42 typedef u32 compat_uint_t; 43 typedef u32 compat_ulong_t; 44 typedef u32 compat_u32; 45 typedef u64 __attribute__((aligned(4))) compat_u64; 46 typedef u32 compat_uptr_t; 47 48 struct compat_timespec { 49 compat_time_t tv_sec; 50 s32 tv_nsec; 51 }; 52 53 struct compat_timeval { 54 compat_time_t tv_sec; 55 s32 tv_usec; 56 }; 57 58 struct compat_stat { 59 compat_dev_t st_dev; 60 u16 __pad1; 61 compat_ino_t st_ino; 62 compat_mode_t st_mode; 63 compat_nlink_t st_nlink; 64 __compat_uid_t st_uid; 65 __compat_gid_t st_gid; 66 compat_dev_t st_rdev; 67 u16 __pad2; 68 u32 st_size; 69 u32 st_blksize; 70 u32 st_blocks; 71 u32 st_atime; 72 u32 st_atime_nsec; 73 u32 st_mtime; 74 u32 st_mtime_nsec; 75 u32 st_ctime; 76 u32 st_ctime_nsec; 77 u32 __unused4; 78 u32 __unused5; 79 }; 80 81 struct compat_flock { 82 short l_type; 83 short l_whence; 84 compat_off_t l_start; 85 compat_off_t l_len; 86 compat_pid_t l_pid; 87 }; 88 89 #define F_GETLK64 12 /* using 'struct flock64' */ 90 #define F_SETLK64 13 91 #define F_SETLKW64 14 92 93 /* 94 * IA32 uses 4 byte alignment for 64 bit quantities, 95 * so we need to pack this structure. 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 } __attribute__((packed)); 104 105 struct compat_statfs { 106 int f_type; 107 int f_bsize; 108 int f_blocks; 109 int f_bfree; 110 int f_bavail; 111 int f_files; 112 int f_ffree; 113 compat_fsid_t f_fsid; 114 int f_namelen; /* SunOS ignores this field. */ 115 int f_frsize; 116 int f_flags; 117 int f_spare[4]; 118 }; 119 120 #define COMPAT_RLIM_INFINITY 0xffffffff 121 122 typedef u32 compat_old_sigset_t; /* at least 32 bits */ 123 124 #define _COMPAT_NSIG 64 125 #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 typedef struct compat_siginfo { 135 int si_signo; 136 int si_errno; 137 int si_code; 138 139 union { 140 int _pad[128/sizeof(int) - 3]; 141 142 /* kill() */ 143 struct { 144 unsigned int _pid; /* sender's pid */ 145 unsigned int _uid; /* sender's uid */ 146 } _kill; 147 148 /* POSIX.1b timers */ 149 struct { 150 compat_timer_t _tid; /* timer id */ 151 int _overrun; /* overrun count */ 152 compat_sigval_t _sigval; /* same as below */ 153 int _sys_private; /* not to be passed to user */ 154 int _overrun_incr; /* amount to add to overrun */ 155 } _timer; 156 157 /* POSIX.1b signals */ 158 struct { 159 unsigned int _pid; /* sender's pid */ 160 unsigned int _uid; /* sender's uid */ 161 compat_sigval_t _sigval; 162 } _rt; 163 164 /* SIGCHLD */ 165 struct { 166 unsigned int _pid; /* which child */ 167 unsigned int _uid; /* sender's uid */ 168 int _status; /* exit code */ 169 compat_clock_t _utime; 170 compat_clock_t _stime; 171 } _sigchld; 172 173 /* SIGCHLD (x32 version) */ 174 struct { 175 unsigned int _pid; /* which child */ 176 unsigned int _uid; /* sender's uid */ 177 int _status; /* exit code */ 178 compat_s64 _utime; 179 compat_s64 _stime; 180 } _sigchld_x32; 181 182 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ 183 struct { 184 unsigned int _addr; /* faulting insn/memory ref. */ 185 short int _addr_lsb; /* Valid LSB of the reported address. */ 186 union { 187 /* used when si_code=SEGV_BNDERR */ 188 struct { 189 compat_uptr_t _lower; 190 compat_uptr_t _upper; 191 } _addr_bnd; 192 /* used when si_code=SEGV_PKUERR */ 193 compat_u32 _pkey; 194 }; 195 } _sigfault; 196 197 /* SIGPOLL */ 198 struct { 199 int _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 200 int _fd; 201 } _sigpoll; 202 203 struct { 204 unsigned int _call_addr; /* calling insn */ 205 int _syscall; /* triggering system call number */ 206 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 207 } _sigsys; 208 } _sifields; 209 } compat_siginfo_t; 210 211 #define COMPAT_OFF_T_MAX 0x7fffffff 212 #define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL 213 214 struct compat_ipc64_perm { 215 compat_key_t key; 216 __compat_uid32_t uid; 217 __compat_gid32_t gid; 218 __compat_uid32_t cuid; 219 __compat_gid32_t cgid; 220 unsigned short mode; 221 unsigned short __pad1; 222 unsigned short seq; 223 unsigned short __pad2; 224 compat_ulong_t unused1; 225 compat_ulong_t unused2; 226 }; 227 228 struct compat_semid64_ds { 229 struct compat_ipc64_perm sem_perm; 230 compat_time_t sem_otime; 231 compat_ulong_t __unused1; 232 compat_time_t sem_ctime; 233 compat_ulong_t __unused2; 234 compat_ulong_t sem_nsems; 235 compat_ulong_t __unused3; 236 compat_ulong_t __unused4; 237 }; 238 239 struct compat_msqid64_ds { 240 struct compat_ipc64_perm msg_perm; 241 compat_time_t msg_stime; 242 compat_ulong_t __unused1; 243 compat_time_t msg_rtime; 244 compat_ulong_t __unused2; 245 compat_time_t msg_ctime; 246 compat_ulong_t __unused3; 247 compat_ulong_t msg_cbytes; 248 compat_ulong_t msg_qnum; 249 compat_ulong_t msg_qbytes; 250 compat_pid_t msg_lspid; 251 compat_pid_t msg_lrpid; 252 compat_ulong_t __unused4; 253 compat_ulong_t __unused5; 254 }; 255 256 struct compat_shmid64_ds { 257 struct compat_ipc64_perm shm_perm; 258 compat_size_t shm_segsz; 259 compat_time_t shm_atime; 260 compat_ulong_t __unused1; 261 compat_time_t shm_dtime; 262 compat_ulong_t __unused2; 263 compat_time_t shm_ctime; 264 compat_ulong_t __unused3; 265 compat_pid_t shm_cpid; 266 compat_pid_t shm_lpid; 267 compat_ulong_t shm_nattch; 268 compat_ulong_t __unused4; 269 compat_ulong_t __unused5; 270 }; 271 272 /* 273 * The type of struct elf_prstatus.pr_reg in compatible core dumps. 274 */ 275 typedef struct user_regs_struct compat_elf_gregset_t; 276 277 /* Full regset -- prstatus on x32, otherwise on ia32 */ 278 #define PRSTATUS_SIZE(S, R) (R != sizeof(S.pr_reg) ? 144 : 296) 279 #define SET_PR_FPVALID(S, V, R) \ 280 do { *(int *) (((void *) &((S)->pr_reg)) + R) = (V); } \ 281 while (0) 282 283 #ifdef CONFIG_X86_X32_ABI 284 #define COMPAT_USE_64BIT_TIME \ 285 (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)) 286 #endif 287 288 /* 289 * A pointer passed in from user mode. This should not 290 * be used for syscall parameters, just declare them 291 * as pointers because the syscall entry code will have 292 * appropriately converted them already. 293 */ 294 295 static inline void __user *compat_ptr(compat_uptr_t uptr) 296 { 297 return (void __user *)(unsigned long)uptr; 298 } 299 300 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 301 { 302 return (u32)(unsigned long)uptr; 303 } 304 305 static inline void __user *arch_compat_alloc_user_space(long len) 306 { 307 compat_uptr_t sp; 308 309 if (test_thread_flag(TIF_IA32)) { 310 sp = task_pt_regs(current)->sp; 311 } else { 312 /* -128 for the x32 ABI redzone */ 313 sp = task_pt_regs(current)->sp - 128; 314 } 315 316 return (void __user *)round_down(sp - len, 16); 317 } 318 319 static inline bool in_x32_syscall(void) 320 { 321 #ifdef CONFIG_X86_X32_ABI 322 if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT) 323 return true; 324 #endif 325 return false; 326 } 327 328 static inline bool in_compat_syscall(void) 329 { 330 return in_ia32_syscall() || in_x32_syscall(); 331 } 332 #define in_compat_syscall in_compat_syscall /* override the generic impl */ 333 334 #endif /* _ASM_X86_COMPAT_H */ 335