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_time_t;
  21 typedef s32             compat_clock_t;
  22 typedef s32             compat_pid_t;
  23 typedef u32             __compat_uid_t;
  24 typedef u32             __compat_gid_t;
  25 typedef u32             __compat_uid32_t;
  26 typedef u32             __compat_gid32_t;
  27 typedef u32             compat_mode_t;
  28 typedef u32             compat_ino_t;
  29 typedef u32             compat_dev_t;
  30 typedef s32             compat_off_t;
  31 typedef s64             compat_loff_t;
  32 typedef s16             compat_nlink_t;
  33 typedef u16             compat_ipc_pid_t;
  34 typedef s32             compat_daddr_t;
  35 typedef u32             compat_caddr_t;
  36 typedef __kernel_fsid_t compat_fsid_t;
  37 typedef s32             compat_key_t;
  38 typedef s32             compat_timer_t;
  39
  40 typedef s32             compat_int_t;
  41 typedef s32             compat_long_t;
  42 typedef s64             compat_s64;
  43 typedef u32             compat_uint_t;
  44 typedef u32             compat_ulong_t;
  45 typedef u64             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         compat_ino_t    st_ino;
  61         compat_mode_t   st_mode;
  62         compat_nlink_t  st_nlink;
  63         __compat_uid32_t        st_uid;
  64         __compat_gid32_t        st_gid;
  65         compat_dev_t    st_rdev;
  66         compat_off_t    st_size;
  67         compat_off_t    st_blksize;
  68         compat_off_t    st_blocks;
  69         compat_time_t   st_atime;
  70         u32             st_atime_nsec;
  71         compat_time_t   st_mtime;
  72         u32             st_mtime_nsec;
  73         compat_time_t   st_ctime;
  74         u32             st_ctime_nsec;
  75         u32             __unused4[2];
  76 };
  77
  78 struct compat_flock {
  79         short           l_type;
  80         short           l_whence;
  81         compat_off_t    l_start;
  82         compat_off_t    l_len;
  83         compat_pid_t    l_pid;
  84 };
  85
  86 #define F_GETLK64       12      /*  using 'struct flock64' */
  87 #define F_SETLK64       13
  88 #define F_SETLKW64      14
  89
  90 struct compat_flock64 {
  91         short           l_type;
  92         short           l_whence;
  93         compat_loff_t   l_start;
  94         compat_loff_t   l_len;
  95         compat_pid_t    l_pid;
  96 };
  97
  98 struct compat_statfs {
  99         int             f_type;
 100         int             f_bsize;
 101         int             f_blocks;
 102         int             f_bfree;
 103         int             f_bavail;
 104         int             f_files;
 105         int             f_ffree;
 106         compat_fsid_t   f_fsid;
 107         int             f_namelen;      /* SunOS ignores this field. */
 108         int             f_frsize;
 109         int             f_flags;
 110         int             f_spare[4];
 111 };
 112
 113 #define COMPAT_RLIM_INFINITY            0xffffffff
 114
 115 typedef u32             compat_old_sigset_t;
 116
 117 #define _COMPAT_NSIG            64
 118 #define _COMPAT_NSIG_BPW        32
 119
 120 typedef u32             compat_sigset_word;
 121
 122 #define COMPAT_OFF_T_MAX        0x7fffffff
 123
 124 /*
 125  * A pointer passed in from user mode. This should not
 126  * be used for syscall parameters, just declare them
 127  * as pointers because the syscall entry code will have
 128  * appropriately converted them already.
 129  */
 130
 131 static inline void __user *compat_ptr(compat_uptr_t uptr)
 132 {
 133         return (void __user *)(unsigned long)uptr;
 134 }
 135
 136 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 137 {
 138         return (u32)(unsigned long)uptr;
 139 }
 140
 141 static inline void __user *arch_compat_alloc_user_space(long len)
 142 {
 143         struct pt_regs *regs = current->thread.regs;
 144         unsigned long usp = regs->gpr[1];
 145
 146         /*
 147          * We can't access below the stack pointer in the 32bit ABI and
 148          * can access 288 bytes in the 64bit big-endian ABI,
 149          * or 512 bytes with the new ELFv2 little-endian ABI.
 150          */
 151         if (!is_32bit_task())
 152                 usp -= USER_REDZONE_SIZE;
 153
 154         return (void __user *) (usp - len);
 155 }
 156
 157 /*
 158  * ipc64_perm is actually 32/64bit clean but since the compat layer refers to
 159  * it we may as well define it.
 160  */
 161 struct compat_ipc64_perm {
 162         compat_key_t key;
 163         __compat_uid_t uid;
 164         __compat_gid_t gid;
 165         __compat_uid_t cuid;
 166         __compat_gid_t cgid;
 167         compat_mode_t mode;
 168         unsigned int seq;
 169         unsigned int __pad2;
 170         unsigned long __unused1;        /* yes they really are 64bit pads */
 171         unsigned long __unused2;
 172 };
 173
 174 struct compat_semid64_ds {
 175         struct compat_ipc64_perm sem_perm;
 176         unsigned int __unused1;
 177         compat_time_t sem_otime;
 178         unsigned int __unused2;
 179         compat_time_t sem_ctime;
 180         compat_ulong_t sem_nsems;
 181         compat_ulong_t __unused3;
 182         compat_ulong_t __unused4;
 183 };
 184
 185 struct compat_msqid64_ds {
 186         struct compat_ipc64_perm msg_perm;
 187         unsigned int __unused1;
 188         compat_time_t msg_stime;
 189         unsigned int __unused2;
 190         compat_time_t msg_rtime;
 191         unsigned int __unused3;
 192         compat_time_t msg_ctime;
 193         compat_ulong_t msg_cbytes;
 194         compat_ulong_t msg_qnum;
 195         compat_ulong_t msg_qbytes;
 196         compat_pid_t msg_lspid;
 197         compat_pid_t msg_lrpid;
 198         compat_ulong_t __unused4;
 199         compat_ulong_t __unused5;
 200 };
 201
 202 struct compat_shmid64_ds {
 203         struct compat_ipc64_perm shm_perm;
 204         unsigned int __unused1;
 205         compat_time_t shm_atime;
 206         unsigned int __unused2;
 207         compat_time_t shm_dtime;
 208         unsigned int __unused3;
 209         compat_time_t shm_ctime;
 210         unsigned int __unused4;
 211         compat_size_t shm_segsz;
 212         compat_pid_t shm_cpid;
 213         compat_pid_t shm_lpid;
 214         compat_ulong_t shm_nattch;
 215         compat_ulong_t __unused5;
 216         compat_ulong_t __unused6;
 217 };
 218
 219 static inline int is_compat_task(void)
 220 {
 221         return is_32bit_task();
 222 }
 223
 224 #endif /* __KERNEL__ */
 225 #endif /* _ASM_POWERPC_COMPAT_H */