arch/powerpc/include/asm/compat.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_COMPAT_H
   3 #define _ASM_POWERPC_COMPAT_H
   4 #ifdef __KERNEL__
   5 /*
   6  * Architecture specific compatibility types
   7  */
   8 #include <linux/types.h>
   9 #include <linux/sched.h>
  10
  11 #define COMPAT_USER_HZ          100
  12 #ifdef __BIG_ENDIAN__
  13 #define COMPAT_UTS_MACHINE      "ppc\0\0"
  14 #else
  15 #define COMPAT_UTS_MACHINE      "ppcle\0\0"
  16 #endif
  17
  18 typedef u32             compat_size_t;
  19 typedef s32             compat_ssize_t;
  20 typedef s32             compat_clock_t;
  21 typedef s32             compat_pid_t;
  22 typedef u32             __compat_uid_t;
  23 typedef u32             __compat_gid_t;
  24 typedef u32             __compat_uid32_t;
  25 typedef u32             __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 s16             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_key_t;
  37 typedef s32             compat_timer_t;
  38
  39 typedef s32             compat_int_t;
  40 typedef s32             compat_long_t;
  41 typedef s64             compat_s64;
  42 typedef u32             compat_uint_t;
  43 typedef u32             compat_ulong_t;
  44 typedef u64             compat_u64;
  45 typedef u32             compat_uptr_t;
  46
  47 struct compat_stat {
  48         compat_dev_t    st_dev;
  49         compat_ino_t    st_ino;
  50         compat_mode_t   st_mode;
  51         compat_nlink_t  st_nlink;
  52         __compat_uid32_t        st_uid;
  53         __compat_gid32_t        st_gid;
  54         compat_dev_t    st_rdev;
  55         compat_off_t    st_size;
  56         compat_off_t    st_blksize;
  57         compat_off_t    st_blocks;
  58         compat_time_t   st_atime;
  59         u32             st_atime_nsec;
  60         compat_time_t   st_mtime;
  61         u32             st_mtime_nsec;
  62         compat_time_t   st_ctime;
  63         u32             st_ctime_nsec;
  64         u32             __unused4[2];
  65 };
  66
  67 struct compat_flock {
  68         short           l_type;
  69         short           l_whence;
  70         compat_off_t    l_start;
  71         compat_off_t    l_len;
  72         compat_pid_t    l_pid;
  73 };
  74
  75 #define F_GETLK64       12      /*  using 'struct flock64' */
  76 #define F_SETLK64       13
  77 #define F_SETLKW64      14
  78
  79 struct compat_flock64 {
  80         short           l_type;
  81         short           l_whence;
  82         compat_loff_t   l_start;
  83         compat_loff_t   l_len;
  84         compat_pid_t    l_pid;
  85 };
  86
  87 struct compat_statfs {
  88         int             f_type;
  89         int             f_bsize;
  90         int             f_blocks;
  91         int             f_bfree;
  92         int             f_bavail;
  93         int             f_files;
  94         int             f_ffree;
  95         compat_fsid_t   f_fsid;
  96         int             f_namelen;      /* SunOS ignores this field. */
  97         int             f_frsize;
  98         int             f_flags;
  99         int             f_spare[4];
 100 };
 101
 102 #define COMPAT_RLIM_INFINITY            0xffffffff
 103
 104 typedef u32             compat_old_sigset_t;
 105
 106 #define _COMPAT_NSIG            64
 107 #define _COMPAT_NSIG_BPW        32
 108
 109 typedef u32             compat_sigset_word;
 110
 111 #define COMPAT_OFF_T_MAX        0x7fffffff
 112
 113 /*
 114  * A pointer passed in from user mode. This should not
 115  * be used for syscall parameters, just declare them
 116  * as pointers because the syscall entry code will have
 117  * appropriately converted them already.
 118  */
 119
 120 static inline void __user *compat_ptr(compat_uptr_t uptr)
 121 {
 122         return (void __user *)(unsigned long)uptr;
 123 }
 124
 125 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 126 {
 127         return (u32)(unsigned long)uptr;
 128 }
 129
 130 static inline void __user *arch_compat_alloc_user_space(long len)
 131 {
 132         struct pt_regs *regs = current->thread.regs;
 133         unsigned long usp = regs->gpr[1];
 134
 135         /*
 136          * We can't access below the stack pointer in the 32bit ABI and
 137          * can access 288 bytes in the 64bit big-endian ABI,
 138          * or 512 bytes with the new ELFv2 little-endian ABI.
 139          */
 140         if (!is_32bit_task())
 141                 usp -= USER_REDZONE_SIZE;
 142
 143         return (void __user *) (usp - len);
 144 }
 145
 146 /*
 147  * ipc64_perm is actually 32/64bit clean but since the compat layer refers to
 148  * it we may as well define it.
 149  */
 150 struct compat_ipc64_perm {
 151         compat_key_t key;
 152         __compat_uid_t uid;
 153         __compat_gid_t gid;
 154         __compat_uid_t cuid;
 155         __compat_gid_t cgid;
 156         compat_mode_t mode;
 157         unsigned int seq;
 158         unsigned int __pad2;
 159         unsigned long __unused1;        /* yes they really are 64bit pads */
 160         unsigned long __unused2;
 161 };
 162
 163 struct compat_semid64_ds {
 164         struct compat_ipc64_perm sem_perm;
 165         unsigned int sem_otime_high;
 166         unsigned int sem_otime;
 167         unsigned int sem_ctime_high;
 168         unsigned int sem_ctime;
 169         compat_ulong_t sem_nsems;
 170         compat_ulong_t __unused3;
 171         compat_ulong_t __unused4;
 172 };
 173
 174 struct compat_msqid64_ds {
 175         struct compat_ipc64_perm msg_perm;
 176         unsigned int msg_stime_high;
 177         unsigned int msg_stime;
 178         unsigned int msg_rtime_high;
 179         unsigned int msg_rtime;
 180         unsigned int msg_ctime_high;
 181         unsigned int msg_ctime;
 182         compat_ulong_t msg_cbytes;
 183         compat_ulong_t msg_qnum;
 184         compat_ulong_t msg_qbytes;
 185         compat_pid_t msg_lspid;
 186         compat_pid_t msg_lrpid;
 187         compat_ulong_t __unused4;
 188         compat_ulong_t __unused5;
 189 };
 190
 191 struct compat_shmid64_ds {
 192         struct compat_ipc64_perm shm_perm;
 193         unsigned int shm_atime_high;
 194         unsigned int shm_atime;
 195         unsigned int shm_dtime_high;
 196         unsigned int shm_dtime;
 197         unsigned int shm_ctime_high;
 198         unsigned int shm_ctime;
 199         unsigned int __unused4;
 200         compat_size_t shm_segsz;
 201         compat_pid_t shm_cpid;
 202         compat_pid_t shm_lpid;
 203         compat_ulong_t shm_nattch;
 204         compat_ulong_t __unused5;
 205         compat_ulong_t __unused6;
 206 };
 207
 208 static inline int is_compat_task(void)
 209 {
 210         return is_32bit_task();
 211 }
 212
 213 #endif /* __KERNEL__ */
 214 #endif /* _ASM_POWERPC_COMPAT_H */