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 */
141
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