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
  67 typedef struct {
  68         u32 mask;
  69         u32 addr;
  70 } __aligned(8) psw_compat_t;
  71
  72 typedef struct {
  73         psw_compat_t psw;
  74         u32 gprs[NUM_GPRS];
  75         u32 acrs[NUM_ACRS];
  76         u32 orig_gpr2;
  77 } s390_compat_regs;
  78
  79 typedef struct {
  80         u32 gprs_high[NUM_GPRS];
  81 } s390_compat_regs_high;
  82
  83 struct compat_stat {
  84         compat_dev_t    st_dev;
  85         u16             __pad1;
  86         compat_ino_t    st_ino;
  87         compat_mode_t   st_mode;
  88         compat_nlink_t  st_nlink;
  89         __compat_uid_t  st_uid;
  90         __compat_gid_t  st_gid;
  91         compat_dev_t    st_rdev;
  92         u16             __pad2;
  93         u32             st_size;
  94         u32             st_blksize;
  95         u32             st_blocks;
  96         u32             st_atime;
  97         u32             st_atime_nsec;
  98         u32             st_mtime;
  99         u32             st_mtime_nsec;
 100         u32             st_ctime;
 101         u32             st_ctime_nsec;
 102         u32             __unused4;
 103         u32             __unused5;
 104 };
 105
 106 struct compat_flock {
 107         short           l_type;
 108         short           l_whence;
 109         compat_off_t    l_start;
 110         compat_off_t    l_len;
 111         compat_pid_t    l_pid;
 112 };
 113
 114 #define F_GETLK64       12
 115 #define F_SETLK64       13
 116 #define F_SETLKW64      14
 117
 118 struct compat_flock64 {
 119         short           l_type;
 120         short           l_whence;
 121         compat_loff_t   l_start;
 122         compat_loff_t   l_len;
 123         compat_pid_t    l_pid;
 124 };
 125
 126 struct compat_statfs {
 127         u32             f_type;
 128         u32             f_bsize;
 129         u32             f_blocks;
 130         u32             f_bfree;
 131         u32             f_bavail;
 132         u32             f_files;
 133         u32             f_ffree;
 134         compat_fsid_t   f_fsid;
 135         u32             f_namelen;
 136         u32             f_frsize;
 137         u32             f_flags;
 138         u32             f_spare[4];
 139 };
 140
 141 struct compat_statfs64 {
 142         u32             f_type;
 143         u32             f_bsize;
 144         u64             f_blocks;
 145         u64             f_bfree;
 146         u64             f_bavail;
 147         u64             f_files;
 148         u64             f_ffree;
 149         compat_fsid_t   f_fsid;
 150         u32             f_namelen;
 151         u32             f_frsize;
 152         u32             f_flags;
 153         u32             f_spare[4];
 154 };
 155
 156 #define COMPAT_RLIM_INFINITY            0xffffffff
 157
 158 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
 159
 160 #define _COMPAT_NSIG            64
 161 #define _COMPAT_NSIG_BPW        32
 162
 163 typedef u32             compat_sigset_word;
 164
 165 #define COMPAT_OFF_T_MAX        0x7fffffff
 166
 167 /*
 168  * A pointer passed in from user mode. This should not
 169  * be used for syscall parameters, just declare them
 170  * as pointers because the syscall entry code will have
 171  * appropriately converted them already.
 172  */
 173
 174 static inline void __user *compat_ptr(compat_uptr_t uptr)
 175 {
 176         return (void __user *)(unsigned long)(uptr & 0x7fffffffUL);
 177 }
 178 #define compat_ptr(uptr) compat_ptr(uptr)
 179
 180 #ifdef CONFIG_COMPAT
 181
 182 static inline int is_compat_task(void)
 183 {
 184         return test_thread_flag(TIF_31BIT);
 185 }
 186
 187 static inline void __user *arch_compat_alloc_user_space(long len)
 188 {
 189         unsigned long stack;
 190
 191         stack = KSTK_ESP(current);
 192         if (is_compat_task())
 193                 stack &= 0x7fffffffUL;
 194         return (void __user *) (stack - len);
 195 }
 196
 197 #endif
 198
 199 struct compat_ipc64_perm {
 200         compat_key_t key;
 201         __compat_uid32_t uid;
 202         __compat_gid32_t gid;
 203         __compat_uid32_t cuid;
 204         __compat_gid32_t cgid;
 205         compat_mode_t mode;
 206         unsigned short __pad1;
 207         unsigned short seq;
 208         unsigned short __pad2;
 209         unsigned int __unused1;
 210         unsigned int __unused2;
 211 };
 212
 213 struct compat_semid64_ds {
 214         struct compat_ipc64_perm sem_perm;
 215         compat_ulong_t sem_otime;
 216         compat_ulong_t sem_otime_high;
 217         compat_ulong_t sem_ctime;
 218         compat_ulong_t sem_ctime_high;
 219         compat_ulong_t sem_nsems;
 220         compat_ulong_t __unused1;
 221         compat_ulong_t __unused2;
 222 };
 223
 224 struct compat_msqid64_ds {
 225         struct compat_ipc64_perm msg_perm;
 226         compat_ulong_t msg_stime;
 227         compat_ulong_t msg_stime_high;
 228         compat_ulong_t msg_rtime;
 229         compat_ulong_t msg_rtime_high;
 230         compat_ulong_t msg_ctime;
 231         compat_ulong_t msg_ctime_high;
 232         compat_ulong_t msg_cbytes;
 233         compat_ulong_t msg_qnum;
 234         compat_ulong_t msg_qbytes;
 235         compat_pid_t   msg_lspid;
 236         compat_pid_t   msg_lrpid;
 237         compat_ulong_t __unused1;
 238         compat_ulong_t __unused2;
 239 };
 240
 241 struct compat_shmid64_ds {
 242         struct compat_ipc64_perm shm_perm;
 243         compat_size_t  shm_segsz;
 244         compat_ulong_t shm_atime;
 245         compat_ulong_t shm_atime_high;
 246         compat_ulong_t shm_dtime;
 247         compat_ulong_t shm_dtime_high;
 248         compat_ulong_t shm_ctime;
 249         compat_ulong_t shm_ctime_high;
 250         compat_pid_t   shm_cpid;
 251         compat_pid_t   shm_lpid;
 252         compat_ulong_t shm_nattch;
 253         compat_ulong_t __unused1;
 254         compat_ulong_t __unused2;
 255 };
 256 #endif /* _ASM_S390X_COMPAT_H */