Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2012 ARM Ltd.
4 */
5#ifndef __ASM_COMPAT_H
6#define __ASM_COMPAT_H
7
8#define compat_mode_t compat_mode_t
9typedef u16 compat_mode_t;
10
11#include <asm-generic/compat.h>
12
13#ifdef CONFIG_COMPAT
14
15/*
16 * Architecture specific compatibility types
17 */
18#include <linux/types.h>
19#include <linux/sched.h>
20#include <linux/sched/task_stack.h>
21
22#define COMPAT_USER_HZ 100
23#ifdef __AARCH64EB__
24#define COMPAT_UTS_MACHINE "armv8b\0\0"
25#else
26#define COMPAT_UTS_MACHINE "armv8l\0\0"
27#endif
28
29typedef u16 __compat_uid_t;
30typedef u16 __compat_gid_t;
31typedef u16 __compat_uid16_t;
32typedef u16 __compat_gid16_t;
33typedef u32 compat_dev_t;
34typedef s32 compat_nlink_t;
35typedef u16 compat_ipc_pid_t;
36typedef __kernel_fsid_t compat_fsid_t;
37
38struct compat_stat {
39#ifdef __AARCH64EB__
40 short st_dev;
41 short __pad1;
42#else
43 compat_dev_t st_dev;
44#endif
45 compat_ino_t st_ino;
46 compat_mode_t st_mode;
47 compat_ushort_t st_nlink;
48 __compat_uid16_t st_uid;
49 __compat_gid16_t st_gid;
50#ifdef __AARCH64EB__
51 short st_rdev;
52 short __pad2;
53#else
54 compat_dev_t st_rdev;
55#endif
56 compat_off_t st_size;
57 compat_off_t st_blksize;
58 compat_off_t st_blocks;
59 old_time32_t st_atime;
60 compat_ulong_t st_atime_nsec;
61 old_time32_t st_mtime;
62 compat_ulong_t st_mtime_nsec;
63 old_time32_t st_ctime;
64 compat_ulong_t st_ctime_nsec;
65 compat_ulong_t __unused4[2];
66};
67
68struct compat_flock {
69 short l_type;
70 short l_whence;
71 compat_off_t l_start;
72 compat_off_t l_len;
73 compat_pid_t l_pid;
74};
75
76#define F_GETLK64 12 /* using 'struct flock64' */
77#define F_SETLK64 13
78#define F_SETLKW64 14
79
80struct compat_flock64 {
81 short l_type;
82 short l_whence;
83 compat_loff_t l_start;
84 compat_loff_t l_len;
85 compat_pid_t l_pid;
86};
87
88struct compat_statfs {
89 int f_type;
90 int f_bsize;
91 int f_blocks;
92 int f_bfree;
93 int f_bavail;
94 int f_files;
95 int f_ffree;
96 compat_fsid_t f_fsid;
97 int f_namelen; /* SunOS ignores this field. */
98 int f_frsize;
99 int f_flags;
100 int f_spare[4];
101};
102
103#define COMPAT_RLIM_INFINITY 0xffffffff
104
105#define COMPAT_OFF_T_MAX 0x7fffffff
106
107#define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
108#define COMPAT_MINSIGSTKSZ 2048
109
110struct compat_ipc64_perm {
111 compat_key_t key;
112 __compat_uid32_t uid;
113 __compat_gid32_t gid;
114 __compat_uid32_t cuid;
115 __compat_gid32_t cgid;
116 unsigned short mode;
117 unsigned short __pad1;
118 unsigned short seq;
119 unsigned short __pad2;
120 compat_ulong_t unused1;
121 compat_ulong_t unused2;
122};
123
124struct compat_semid64_ds {
125 struct compat_ipc64_perm sem_perm;
126 compat_ulong_t sem_otime;
127 compat_ulong_t sem_otime_high;
128 compat_ulong_t sem_ctime;
129 compat_ulong_t sem_ctime_high;
130 compat_ulong_t sem_nsems;
131 compat_ulong_t __unused3;
132 compat_ulong_t __unused4;
133};
134
135struct compat_msqid64_ds {
136 struct compat_ipc64_perm msg_perm;
137 compat_ulong_t msg_stime;
138 compat_ulong_t msg_stime_high;
139 compat_ulong_t msg_rtime;
140 compat_ulong_t msg_rtime_high;
141 compat_ulong_t msg_ctime;
142 compat_ulong_t msg_ctime_high;
143 compat_ulong_t msg_cbytes;
144 compat_ulong_t msg_qnum;
145 compat_ulong_t msg_qbytes;
146 compat_pid_t msg_lspid;
147 compat_pid_t msg_lrpid;
148 compat_ulong_t __unused4;
149 compat_ulong_t __unused5;
150};
151
152struct compat_shmid64_ds {
153 struct compat_ipc64_perm shm_perm;
154 compat_size_t shm_segsz;
155 compat_ulong_t shm_atime;
156 compat_ulong_t shm_atime_high;
157 compat_ulong_t shm_dtime;
158 compat_ulong_t shm_dtime_high;
159 compat_ulong_t shm_ctime;
160 compat_ulong_t shm_ctime_high;
161 compat_pid_t shm_cpid;
162 compat_pid_t shm_lpid;
163 compat_ulong_t shm_nattch;
164 compat_ulong_t __unused4;
165 compat_ulong_t __unused5;
166};
167
168static inline int is_compat_task(void)
169{
170 return test_thread_flag(TIF_32BIT);
171}
172
173static inline int is_compat_thread(struct thread_info *thread)
174{
175 return test_ti_thread_flag(thread, TIF_32BIT);
176}
177
178#else /* !CONFIG_COMPAT */
179
180static inline int is_compat_thread(struct thread_info *thread)
181{
182 return 0;
183}
184
185#endif /* CONFIG_COMPAT */
186#endif /* __ASM_COMPAT_H */