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