arch/mips/include/asm/compat.h

   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         s32             pad[4];
  90 };
  91
  92 #define F_GETLK64       33
  93 #define F_SETLK64       34
  94 #define F_SETLKW64      35
  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 };
 103
 104 struct compat_statfs {
 105         int             f_type;
 106         int             f_bsize;
 107         int             f_frsize;
 108         int             f_blocks;
 109         int             f_bfree;
 110         int             f_files;
 111         int             f_ffree;
 112         int             f_bavail;
 113         compat_fsid_t   f_fsid;
 114         int             f_namelen;
 115         int             f_flags;
 116         int             f_spare[5];
 117 };
 118
 119 #define COMPAT_RLIM_INFINITY    0x7fffffffUL
 120
 121 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
 122
 123 #define _COMPAT_NSIG            128             /* Don't ask !$@#% ...  */
 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 /* Can't use the generic version because si_code and si_errno are swapped */
 134
 135 #define SI_PAD_SIZE32   (128/sizeof(int) - 3)
 136
 137 typedef struct compat_siginfo {
 138         int si_signo;
 139         int si_code;
 140         int si_errno;
 141
 142         union {
 143                 int _pad[128 / sizeof(int) - 3];
 144
 145                 /* kill() */
 146                 struct {
 147                         compat_pid_t _pid;      /* sender's pid */
 148                         __compat_uid32_t _uid;  /* sender's uid */
 149                 } _kill;
 150
 151                 /* POSIX.1b timers */
 152                 struct {
 153                         compat_timer_t _tid;    /* timer id */
 154                         int _overrun;           /* overrun count */
 155                         compat_sigval_t _sigval;        /* same as below */
 156                 } _timer;
 157
 158                 /* POSIX.1b signals */
 159                 struct {
 160                         compat_pid_t _pid;      /* sender's pid */
 161                         __compat_uid32_t _uid;  /* sender's uid */
 162                         compat_sigval_t _sigval;
 163                 } _rt;
 164
 165                 /* SIGCHLD */
 166                 struct {
 167                         compat_pid_t _pid;      /* which child */
 168                         __compat_uid32_t _uid;  /* sender's uid */
 169                         int _status;            /* exit code */
 170                         compat_clock_t _utime;
 171                         compat_clock_t _stime;
 172                 } _sigchld;
 173
 174                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
 175                 struct {
 176                         compat_uptr_t _addr;    /* faulting insn/memory ref. */
 177 #ifdef __ARCH_SI_TRAPNO
 178                         int _trapno;    /* TRAP # which caused the signal */
 179 #endif
 180                         short _addr_lsb; /* LSB of the reported address */
 181                         struct {
 182                                 compat_uptr_t _lower;
 183                                 compat_uptr_t _upper;
 184                         } _addr_bnd;
 185                 } _sigfault;
 186
 187                 /* SIGPOLL */
 188                 struct {
 189                         compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
 190                         int _fd;
 191                 } _sigpoll;
 192
 193                 struct {
 194                         compat_uptr_t _call_addr; /* calling insn */
 195                         int _syscall;   /* triggering system call number */
 196                         compat_uint_t _arch;    /* AUDIT_ARCH_* of syscall */
 197                 } _sigsys;
 198         } _sifields;
 199 } compat_siginfo_t;
 200
 201 #define COMPAT_OFF_T_MAX        0x7fffffff
 202
 203 /*
 204  * A pointer passed in from user mode. This should not
 205  * be used for syscall parameters, just declare them
 206  * as pointers because the syscall entry code will have
 207  * appropriately converted them already.
 208  */
 209
 210 static inline void __user *compat_ptr(compat_uptr_t uptr)
 211 {
 212         /* cast to a __user pointer via "unsigned long" makes sparse happy */
 213         return (void __user *)(unsigned long)(long)uptr;
 214 }
 215
 216 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 217 {
 218         return (u32)(unsigned long)uptr;
 219 }
 220
 221 static inline void __user *arch_compat_alloc_user_space(long len)
 222 {
 223         struct pt_regs *regs = (struct pt_regs *)
 224                 ((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;
 225
 226         return (void __user *) (regs->regs[29] - len);
 227 }
 228
 229 struct compat_ipc64_perm {
 230         compat_key_t key;
 231         __compat_uid32_t uid;
 232         __compat_gid32_t gid;
 233         __compat_uid32_t cuid;
 234         __compat_gid32_t cgid;
 235         compat_mode_t mode;
 236         unsigned short seq;
 237         unsigned short __pad2;
 238         compat_ulong_t __unused1;
 239         compat_ulong_t __unused2;
 240 };
 241
 242 struct compat_semid64_ds {
 243         struct compat_ipc64_perm sem_perm;
 244         compat_time_t   sem_otime;
 245         compat_time_t   sem_ctime;
 246         compat_ulong_t  sem_nsems;
 247         compat_ulong_t  __unused1;
 248         compat_ulong_t  __unused2;
 249 };
 250
 251 struct compat_msqid64_ds {
 252         struct compat_ipc64_perm msg_perm;
 253 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 254         compat_ulong_t  __unused1;
 255 #endif
 256         compat_time_t   msg_stime;
 257 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 258         compat_ulong_t  __unused1;
 259 #endif
 260 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 261         compat_ulong_t  __unused2;
 262 #endif
 263         compat_time_t   msg_rtime;
 264 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 265         compat_ulong_t  __unused2;
 266 #endif
 267 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 268         compat_ulong_t  __unused3;
 269 #endif
 270         compat_time_t   msg_ctime;
 271 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 272         compat_ulong_t  __unused3;
 273 #endif
 274         compat_ulong_t  msg_cbytes;
 275         compat_ulong_t  msg_qnum;
 276         compat_ulong_t  msg_qbytes;
 277         compat_pid_t    msg_lspid;
 278         compat_pid_t    msg_lrpid;
 279         compat_ulong_t  __unused4;
 280         compat_ulong_t  __unused5;
 281 };
 282
 283 struct compat_shmid64_ds {
 284         struct compat_ipc64_perm shm_perm;
 285         compat_size_t   shm_segsz;
 286         compat_time_t   shm_atime;
 287         compat_time_t   shm_dtime;
 288         compat_time_t   shm_ctime;
 289         compat_pid_t    shm_cpid;
 290         compat_pid_t    shm_lpid;
 291         compat_ulong_t  shm_nattch;
 292         compat_ulong_t  __unused1;
 293         compat_ulong_t  __unused2;
 294 };
 295
 296 /* MIPS has unusual order of fields in stack_t */
 297 typedef struct compat_sigaltstack {
 298         compat_uptr_t                   ss_sp;
 299         compat_size_t                   ss_size;
 300         int                             ss_flags;
 301 } compat_stack_t;
 302 #define compat_sigaltstack compat_sigaltstack
 303
 304 static inline int is_compat_task(void)
 305 {
 306         return test_thread_flag(TIF_32BIT_ADDR);
 307 }
 308
 309 #endif /* _ASM_COMPAT_H */