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 #include <asm/ptrace.h>
  12
  13 #define compat_mode_t   compat_mode_t
  14 typedef u16             compat_mode_t;
  15
  16 #define __compat_uid_t  __compat_uid_t
  17 typedef u16             __compat_uid_t;
  18 typedef u16             __compat_gid_t;
  19
  20 #define compat_dev_t    compat_dev_t
  21 typedef u16             compat_dev_t;
  22
  23 #define compat_ipc_pid_t compat_ipc_pid_t
  24 typedef u16              compat_ipc_pid_t;
  25
  26 #define compat_statfs   compat_statfs
  27
  28 #include <asm-generic/compat.h>
  29
  30 #define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p( \
  31                                 typeof(0?(__force t)0:0ULL), u64))
  32
  33 #define __SC_DELOUSE(t,v) ({ \
  34         BUILD_BUG_ON(sizeof(t) > 4 && !__TYPE_IS_PTR(t)); \
  35         (__force t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v)); \
  36 })
  37
  38 #define PSW32_MASK_USER         0x0000FF00UL
  39
  40 #define PSW32_USER_BITS (PSW32_MASK_DAT | PSW32_MASK_IO | PSW32_MASK_EXT | \
  41                          PSW32_DEFAULT_KEY | PSW32_MASK_BASE | \
  42                          PSW32_MASK_MCHECK | PSW32_MASK_PSTATE | \
  43                          PSW32_ASC_PRIMARY)
  44
  45 #define COMPAT_UTS_MACHINE      "s390\0\0\0\0"
  46
  47 typedef u16             compat_nlink_t;
  48
  49 typedef struct {
  50         u32 mask;
  51         u32 addr;
  52 } __aligned(8) psw_compat_t;
  53
  54 typedef struct {
  55         psw_compat_t psw;
  56         u32 gprs[NUM_GPRS];
  57         u32 acrs[NUM_ACRS];
  58         u32 orig_gpr2;
  59 } s390_compat_regs;
  60
  61 typedef struct {
  62         u32 gprs_high[NUM_GPRS];
  63 } s390_compat_regs_high;
  64
  65 struct compat_stat {
  66         compat_dev_t    st_dev;
  67         u16             __pad1;
  68         compat_ino_t    st_ino;
  69         compat_mode_t   st_mode;
  70         compat_nlink_t  st_nlink;
  71         __compat_uid_t  st_uid;
  72         __compat_gid_t  st_gid;
  73         compat_dev_t    st_rdev;
  74         u16             __pad2;
  75         u32             st_size;
  76         u32             st_blksize;
  77         u32             st_blocks;
  78         u32             st_atime;
  79         u32             st_atime_nsec;
  80         u32             st_mtime;
  81         u32             st_mtime_nsec;
  82         u32             st_ctime;
  83         u32             st_ctime_nsec;
  84         u32             __unused4;
  85         u32             __unused5;
  86 };
  87
  88 struct compat_statfs {
  89         u32             f_type;
  90         u32             f_bsize;
  91         u32             f_blocks;
  92         u32             f_bfree;
  93         u32             f_bavail;
  94         u32             f_files;
  95         u32             f_ffree;
  96         compat_fsid_t   f_fsid;
  97         u32             f_namelen;
  98         u32             f_frsize;
  99         u32             f_flags;
 100         u32             f_spare[4];
 101 };
 102
 103 struct compat_statfs64 {
 104         u32             f_type;
 105         u32             f_bsize;
 106         u64             f_blocks;
 107         u64             f_bfree;
 108         u64             f_bavail;
 109         u64             f_files;
 110         u64             f_ffree;
 111         compat_fsid_t   f_fsid;
 112         u32             f_namelen;
 113         u32             f_frsize;
 114         u32             f_flags;
 115         u32             f_spare[5];
 116 };
 117
 118 /*
 119  * A pointer passed in from user mode. This should not
 120  * be used for syscall parameters, just declare them
 121  * as pointers because the syscall entry code will have
 122  * appropriately converted them already.
 123  */
 124
 125 static inline void __user *compat_ptr(compat_uptr_t uptr)
 126 {
 127         return (void __user *)(unsigned long)(uptr & 0x7fffffffUL);
 128 }
 129 #define compat_ptr(uptr) compat_ptr(uptr)
 130
 131 #ifdef CONFIG_COMPAT
 132
 133 static inline int is_compat_task(void)
 134 {
 135         return test_thread_flag(TIF_31BIT);
 136 }
 137
 138 #endif
 139
 140 #endif /* _ASM_S390X_COMPAT_H */