arch/s390/include/asm/compat.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_S390X_COMPAT_H
   3 #define _ASM_S390X_COMPAT_H
   4 /*
   5  * Architecture specific compatibility types
   6  */
   7 #include <linux/types.h>
   8 #include <linux/sched.h>
   9 #include <linux/sched/task_stack.h>
  10 #include <linux/thread_info.h>
  11
  12 #define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p( \
  13                                 typeof(0?(__force t)0:0ULL), u64))
  14
  15 #define __SC_DELOUSE(t,v) ({ \
  16         BUILD_BUG_ON(sizeof(t) > 4 && !__TYPE_IS_PTR(t)); \
  17         (__force t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v)); \
  18 })
  19
  20 #define PSW32_MASK_PER          0x40000000UL
  21 #define PSW32_MASK_DAT          0x04000000UL
  22 #define PSW32_MASK_IO           0x02000000UL
  23 #define PSW32_MASK_EXT          0x01000000UL
  24 #define PSW32_MASK_KEY          0x00F00000UL
  25 #define PSW32_MASK_BASE         0x00080000UL    /* Always one */
  26 #define PSW32_MASK_MCHECK       0x00040000UL
  27 #define PSW32_MASK_WAIT         0x00020000UL
  28 #define PSW32_MASK_PSTATE       0x00010000UL
  29 #define PSW32_MASK_ASC          0x0000C000UL
  30 #define PSW32_MASK_CC           0x00003000UL
  31 #define PSW32_MASK_PM           0x00000f00UL
  32 #define PSW32_MASK_RI           0x00000080UL
  33
  34 #define PSW32_MASK_USER         0x0000FF00UL
  35
  36 #define PSW32_ADDR_AMODE        0x80000000UL
  37 #define PSW32_ADDR_INSN         0x7FFFFFFFUL
  38
  39 #define PSW32_DEFAULT_KEY       (((u32) PAGE_DEFAULT_ACC) << 20)
  40
  41 #define PSW32_ASC_PRIMARY       0x00000000UL
  42 #define PSW32_ASC_ACCREG        0x00004000UL
  43 #define PSW32_ASC_SECONDARY     0x00008000UL
  44 #define PSW32_ASC_HOME          0x0000C000UL
  45
  46 #define PSW32_USER_BITS (PSW32_MASK_DAT | PSW32_MASK_IO | PSW32_MASK_EXT | \
  47                          PSW32_DEFAULT_KEY | PSW32_MASK_BASE | \
  48                          PSW32_MASK_MCHECK | PSW32_MASK_PSTATE | \
  49                          PSW32_ASC_PRIMARY)
  50
  51 #define COMPAT_USER_HZ          100
  52 #define COMPAT_UTS_MACHINE      "s390\0\0\0\0"
  53
  54 typedef u32             compat_size_t;
  55 typedef s32             compat_ssize_t;
  56 typedef s32             compat_clock_t;
  57 typedef s32             compat_pid_t;
  58 typedef u16             __compat_uid_t;
  59 typedef u16             __compat_gid_t;
  60 typedef u32             __compat_uid32_t;
  61 typedef u32             __compat_gid32_t;
  62 typedef u16             compat_mode_t;
  63 typedef u32             compat_ino_t;
  64 typedef u16             compat_dev_t;
  65 typedef s32             compat_off_t;
  66 typedef s64             compat_loff_t;
  67 typedef u16             compat_nlink_t;
  68 typedef u16             compat_ipc_pid_t;
  69 typedef s32             compat_daddr_t;
  70 typedef u32             compat_caddr_t;
  71 typedef __kernel_fsid_t compat_fsid_t;
  72 typedef s32             compat_key_t;
  73 typedef s32             compat_timer_t;
  74
  75 typedef s32             compat_int_t;
  76 typedef s32             compat_long_t;
  77 typedef s64             compat_s64;
  78 typedef u32             compat_uint_t;
  79 typedef u32             compat_ulong_t;
  80 typedef u64             compat_u64;
  81 typedef u32             compat_uptr_t;
  82
  83 typedef struct {
  84         u32 mask;
  85         u32 addr;
  86 } __aligned(8) psw_compat_t;
  87
  88 typedef struct {
  89         psw_compat_t psw;
  90         u32 gprs[NUM_GPRS];
  91         u32 acrs[NUM_ACRS];
  92         u32 orig_gpr2;
  93 } s390_compat_regs;
  94
  95 typedef struct {
  96         u32 gprs_high[NUM_GPRS];
  97 } s390_compat_regs_high;
  98
  99 struct compat_stat {
 100         compat_dev_t    st_dev;
 101         u16             __pad1;
 102         compat_ino_t    st_ino;
 103         compat_mode_t   st_mode;
 104         compat_nlink_t  st_nlink;
 105         __compat_uid_t  st_uid;
 106         __compat_gid_t  st_gid;
 107         compat_dev_t    st_rdev;
 108         u16             __pad2;
 109         u32             st_size;
 110         u32             st_blksize;
 111         u32             st_blocks;
 112         u32             st_atime;
 113         u32             st_atime_nsec;
 114         u32             st_mtime;
 115         u32             st_mtime_nsec;
 116         u32             st_ctime;
 117         u32             st_ctime_nsec;
 118         u32             __unused4;
 119         u32             __unused5;
 120 };
 121
 122 struct compat_flock {
 123         short           l_type;
 124         short           l_whence;
 125         compat_off_t    l_start;
 126         compat_off_t    l_len;
 127         compat_pid_t    l_pid;
 128 };
 129
 130 #define F_GETLK64       12
 131 #define F_SETLK64       13
 132 #define F_SETLKW64      14
 133
 134 struct compat_flock64 {
 135         short           l_type;
 136         short           l_whence;
 137         compat_loff_t   l_start;
 138         compat_loff_t   l_len;
 139         compat_pid_t    l_pid;
 140 };
 141
 142 struct compat_statfs {
 143         u32             f_type;
 144         u32             f_bsize;
 145         u32             f_blocks;
 146         u32             f_bfree;
 147         u32             f_bavail;
 148         u32             f_files;
 149         u32             f_ffree;
 150         compat_fsid_t   f_fsid;
 151         u32             f_namelen;
 152         u32             f_frsize;
 153         u32             f_flags;
 154         u32             f_spare[4];
 155 };
 156
 157 struct compat_statfs64 {
 158         u32             f_type;
 159         u32             f_bsize;
 160         u64             f_blocks;
 161         u64             f_bfree;
 162         u64             f_bavail;
 163         u64             f_files;
 164         u64             f_ffree;
 165         compat_fsid_t   f_fsid;
 166         u32             f_namelen;
 167         u32             f_frsize;
 168         u32             f_flags;
 169         u32             f_spare[4];
 170 };
 171
 172 #define COMPAT_RLIM_INFINITY            0xffffffff
 173
 174 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
 175
 176 #define _COMPAT_NSIG            64
 177 #define _COMPAT_NSIG_BPW        32
 178
 179 typedef u32             compat_sigset_word;
 180
 181 #define COMPAT_OFF_T_MAX        0x7fffffff
 182
 183 /*
 184  * A pointer passed in from user mode. This should not
 185  * be used for syscall parameters, just declare them
 186  * as pointers because the syscall entry code will have
 187  * appropriately converted them already.
 188  */
 189
 190 static inline void __user *compat_ptr(compat_uptr_t uptr)
 191 {
 192         return (void __user *)(unsigned long)(uptr & 0x7fffffffUL);
 193 }
 194
 195 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 196 {
 197         return (u32)(unsigned long)uptr;
 198 }
 199
 200 #ifdef CONFIG_COMPAT
 201
 202 static inline int is_compat_task(void)
 203 {
 204         return test_thread_flag(TIF_31BIT);
 205 }
 206
 207 static inline void __user *arch_compat_alloc_user_space(long len)
 208 {
 209         unsigned long stack;
 210
 211         stack = KSTK_ESP(current);
 212         if (is_compat_task())
 213                 stack &= 0x7fffffffUL;
 214         return (void __user *) (stack - len);
 215 }
 216
 217 #endif
 218
 219 struct compat_ipc64_perm {
 220         compat_key_t key;
 221         __compat_uid32_t uid;
 222         __compat_gid32_t gid;
 223         __compat_uid32_t cuid;
 224         __compat_gid32_t cgid;
 225         compat_mode_t mode;
 226         unsigned short __pad1;
 227         unsigned short seq;
 228         unsigned short __pad2;
 229         unsigned int __unused1;
 230         unsigned int __unused2;
 231 };
 232
 233 struct compat_semid64_ds {
 234         struct compat_ipc64_perm sem_perm;
 235         compat_ulong_t sem_otime;
 236         compat_ulong_t sem_otime_high;
 237         compat_ulong_t sem_ctime;
 238         compat_ulong_t sem_ctime_high;
 239         compat_ulong_t sem_nsems;
 240         compat_ulong_t __unused1;
 241         compat_ulong_t __unused2;
 242 };
 243
 244 struct compat_msqid64_ds {
 245         struct compat_ipc64_perm msg_perm;
 246         compat_ulong_t msg_stime;
 247         compat_ulong_t msg_stime_high;
 248         compat_ulong_t msg_rtime;
 249         compat_ulong_t msg_rtime_high;
 250         compat_ulong_t msg_ctime;
 251         compat_ulong_t msg_ctime_high;
 252         compat_ulong_t msg_cbytes;
 253         compat_ulong_t msg_qnum;
 254         compat_ulong_t msg_qbytes;
 255         compat_pid_t   msg_lspid;
 256         compat_pid_t   msg_lrpid;
 257         compat_ulong_t __unused1;
 258         compat_ulong_t __unused2;
 259 };
 260
 261 struct compat_shmid64_ds {
 262         struct compat_ipc64_perm shm_perm;
 263         compat_size_t  shm_segsz;
 264         compat_ulong_t shm_atime;
 265         compat_ulong_t shm_atime_high;
 266         compat_ulong_t shm_dtime;
 267         compat_ulong_t shm_dtime_high;
 268         compat_ulong_t shm_ctime;
 269         compat_ulong_t shm_ctime_high;
 270         compat_pid_t   shm_cpid;
 271         compat_pid_t   shm_lpid;
 272         compat_ulong_t shm_nattch;
 273         compat_ulong_t __unused1;
 274         compat_ulong_t __unused2;
 275 };
 276 #endif /* _ASM_S390X_COMPAT_H */