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_clock_t;
  18 typedef s32             compat_suseconds_t;
  19
  20 typedef s32             compat_pid_t;
  21 typedef s32             __compat_uid_t;
  22 typedef s32             __compat_gid_t;
  23 typedef __compat_uid_t  __compat_uid32_t;
  24 typedef __compat_gid_t  __compat_gid32_t;
  25 typedef u32             compat_mode_t;
  26 typedef u32             compat_ino_t;
  27 typedef u32             compat_dev_t;
  28 typedef s32             compat_off_t;
  29 typedef s64             compat_loff_t;
  30 typedef u32             compat_nlink_t;
  31 typedef s32             compat_ipc_pid_t;
  32 typedef s32             compat_daddr_t;
  33 typedef s32             compat_caddr_t;
  34 typedef struct {
  35         s32     val[2];
  36 } compat_fsid_t;
  37 typedef s32             compat_timer_t;
  38 typedef s32             compat_key_t;
  39
  40 typedef s16             compat_short_t;
  41 typedef s32             compat_int_t;
  42 typedef s32             compat_long_t;
  43 typedef s64             compat_s64;
  44 typedef u16             compat_ushort_t;
  45 typedef u32             compat_uint_t;
  46 typedef u32             compat_ulong_t;
  47 typedef u64             compat_u64;
  48 typedef u32             compat_uptr_t;
  49
  50 struct compat_stat {
  51         compat_dev_t    st_dev;
  52         s32             st_pad1[3];
  53         compat_ino_t    st_ino;
  54         compat_mode_t   st_mode;
  55         compat_nlink_t  st_nlink;
  56         __compat_uid_t  st_uid;
  57         __compat_gid_t  st_gid;
  58         compat_dev_t    st_rdev;
  59         s32             st_pad2[2];
  60         compat_off_t    st_size;
  61         s32             st_pad3;
  62         compat_time_t   st_atime;
  63         s32             st_atime_nsec;
  64         compat_time_t   st_mtime;
  65         s32             st_mtime_nsec;
  66         compat_time_t   st_ctime;
  67         s32             st_ctime_nsec;
  68         s32             st_blksize;
  69         s32             st_blocks;
  70         s32             st_pad4[14];
  71 };
  72
  73 struct compat_flock {
  74         short           l_type;
  75         short           l_whence;
  76         compat_off_t    l_start;
  77         compat_off_t    l_len;
  78         s32             l_sysid;
  79         compat_pid_t    l_pid;
  80         s32             pad[4];
  81 };
  82
  83 #define F_GETLK64       33
  84 #define F_SETLK64       34
  85 #define F_SETLKW64      35
  86
  87 struct compat_flock64 {
  88         short           l_type;
  89         short           l_whence;
  90         compat_loff_t   l_start;
  91         compat_loff_t   l_len;
  92         compat_pid_t    l_pid;
  93 };
  94
  95 struct compat_statfs {
  96         int             f_type;
  97         int             f_bsize;
  98         int             f_frsize;
  99         int             f_blocks;
 100         int             f_bfree;
 101         int             f_files;
 102         int             f_ffree;
 103         int             f_bavail;
 104         compat_fsid_t   f_fsid;
 105         int             f_namelen;
 106         int             f_flags;
 107         int             f_spare[5];
 108 };
 109
 110 #define COMPAT_RLIM_INFINITY    0x7fffffffUL
 111
 112 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
 113
 114 #define _COMPAT_NSIG            128             /* Don't ask !$@#% ...  */
 115 #define _COMPAT_NSIG_BPW        32
 116
 117 typedef u32             compat_sigset_word;
 118
 119 #define COMPAT_OFF_T_MAX        0x7fffffff
 120
 121 /*
 122  * A pointer passed in from user mode. This should not
 123  * be used for syscall parameters, just declare them
 124  * as pointers because the syscall entry code will have
 125  * appropriately converted them already.
 126  */
 127
 128 static inline void __user *compat_ptr(compat_uptr_t uptr)
 129 {
 130         /* cast to a __user pointer via "unsigned long" makes sparse happy */
 131         return (void __user *)(unsigned long)(long)uptr;
 132 }
 133
 134 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 135 {
 136         return (u32)(unsigned long)uptr;
 137 }
 138
 139 static inline void __user *arch_compat_alloc_user_space(long len)
 140 {
 141         struct pt_regs *regs = (struct pt_regs *)
 142                 ((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;
 143
 144         return (void __user *) (regs->regs[29] - len);
 145 }
 146
 147 struct compat_ipc64_perm {
 148         compat_key_t key;
 149         __compat_uid32_t uid;
 150         __compat_gid32_t gid;
 151         __compat_uid32_t cuid;
 152         __compat_gid32_t cgid;
 153         compat_mode_t mode;
 154         unsigned short seq;
 155         unsigned short __pad2;
 156         compat_ulong_t __unused1;
 157         compat_ulong_t __unused2;
 158 };
 159
 160 struct compat_semid64_ds {
 161         struct compat_ipc64_perm sem_perm;
 162         compat_ulong_t  sem_otime;
 163         compat_ulong_t  sem_ctime;
 164         compat_ulong_t  sem_nsems;
 165         compat_ulong_t  sem_otime_high;
 166         compat_ulong_t  sem_ctime_high;
 167 };
 168
 169 struct compat_msqid64_ds {
 170         struct compat_ipc64_perm msg_perm;
 171 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 172         compat_ulong_t  msg_stime_high;
 173 #endif
 174         compat_ulong_t  msg_stime;
 175 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 176         compat_ulong_t  msg_stime_high;
 177 #endif
 178 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 179         compat_ulong_t  msg_rtime_high;
 180 #endif
 181         compat_ulong_t  msg_rtime;
 182 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 183         compat_ulong_t  msg_rtime_high;
 184 #endif
 185 #ifndef CONFIG_CPU_LITTLE_ENDIAN
 186         compat_ulong_t  msg_ctime_high;
 187 #endif
 188         compat_ulong_t  msg_ctime;
 189 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 190         compat_ulong_t  msg_ctime_high;
 191 #endif
 192         compat_ulong_t  msg_cbytes;
 193         compat_ulong_t  msg_qnum;
 194         compat_ulong_t  msg_qbytes;
 195         compat_pid_t    msg_lspid;
 196         compat_pid_t    msg_lrpid;
 197         compat_ulong_t  __unused4;
 198         compat_ulong_t  __unused5;
 199 };
 200
 201 struct compat_shmid64_ds {
 202         struct compat_ipc64_perm shm_perm;
 203         compat_size_t   shm_segsz;
 204         compat_ulong_t  shm_atime;
 205         compat_ulong_t  shm_dtime;
 206         compat_ulong_t  shm_ctime;
 207         compat_pid_t    shm_cpid;
 208         compat_pid_t    shm_lpid;
 209         compat_ulong_t  shm_nattch;
 210         compat_ushort_t shm_atime_high;
 211         compat_ushort_t shm_dtime_high;
 212         compat_ushort_t shm_ctime_high;
 213         compat_ushort_t __unused2;
 214 };
 215
 216 /* MIPS has unusual order of fields in stack_t */
 217 typedef struct compat_sigaltstack {
 218         compat_uptr_t                   ss_sp;
 219         compat_size_t                   ss_size;
 220         int                             ss_flags;
 221 } compat_stack_t;
 222 #define compat_sigaltstack compat_sigaltstack
 223
 224 static inline int is_compat_task(void)
 225 {
 226         return test_thread_flag(TIF_32BIT_ADDR);
 227 }
 228
 229 #endif /* _ASM_COMPAT_H */