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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#include <asm-generic/compat.h>
9
10#ifdef CONFIG_COMPAT
11
12/*
13 * Architecture specific compatibility types
14 */
15#include <linux/types.h>
16#include <linux/sched.h>
17#include <linux/sched/task_stack.h>
18
19#define COMPAT_USER_HZ 100
20#ifdef __AARCH64EB__
21#define COMPAT_UTS_MACHINE "armv8b\0\0"
22#else
23#define COMPAT_UTS_MACHINE "armv8l\0\0"
24#endif
25
26typedef u16 __compat_uid_t;
27typedef u16 __compat_gid_t;
28typedef u16 __compat_uid16_t;
29typedef u16 __compat_gid16_t;
30typedef u32 __compat_uid32_t;
31typedef u32 __compat_gid32_t;
32typedef u16 compat_mode_t;
33typedef u32 compat_dev_t;
34typedef s32 compat_nlink_t;
35typedef u16 compat_ipc_pid_t;
36typedef u32 compat_caddr_t;
37typedef __kernel_fsid_t compat_fsid_t;
38
39struct compat_stat {
40#ifdef __AARCH64EB__
41 short st_dev;
42 short __pad1;
43#else
44 compat_dev_t st_dev;
45#endif
46 compat_ino_t st_ino;
47 compat_mode_t st_mode;
48 compat_ushort_t st_nlink;
49 __compat_uid16_t st_uid;
50 __compat_gid16_t st_gid;
51#ifdef __AARCH64EB__
52 short st_rdev;
53 short __pad2;
54#else
55 compat_dev_t st_rdev;
56#endif
57 compat_off_t st_size;
58 compat_off_t st_blksize;
59 compat_off_t st_blocks;
60 old_time32_t st_atime;
61 compat_ulong_t st_atime_nsec;
62 old_time32_t st_mtime;
63 compat_ulong_t st_mtime_nsec;
64 old_time32_t st_ctime;
65 compat_ulong_t st_ctime_nsec;
66 compat_ulong_t __unused4[2];
67};
68
69struct compat_flock {
70 short l_type;
71 short l_whence;
72 compat_off_t l_start;
73 compat_off_t l_len;
74 compat_pid_t l_pid;
75};
76
77#define F_GETLK64 12 /* using 'struct flock64' */
78#define F_SETLK64 13
79#define F_SETLKW64 14
80
81struct compat_flock64 {
82 short l_type;
83 short l_whence;
84 compat_loff_t l_start;
85 compat_loff_t l_len;
86 compat_pid_t l_pid;
87};
88
89struct compat_statfs {
90 int f_type;
91 int f_bsize;
92 int f_blocks;
93 int f_bfree;
94 int f_bavail;
95 int f_files;
96 int f_ffree;
97 compat_fsid_t f_fsid;
98 int f_namelen; /* SunOS ignores this field. */
99 int f_frsize;
100 int f_flags;
101 int f_spare[4];
102};
103
104#define COMPAT_RLIM_INFINITY 0xffffffff
105
106typedef u32 compat_old_sigset_t;
107
108#define _COMPAT_NSIG 64
109#define _COMPAT_NSIG_BPW 32
110
111typedef u32 compat_sigset_word;
112
113#define COMPAT_OFF_T_MAX 0x7fffffff
114
115#define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
116#define COMPAT_MINSIGSTKSZ 2048
117
118static inline void __user *arch_compat_alloc_user_space(long len)
119{
120 return (void __user *)compat_user_stack_pointer() - len;
121}
122
123struct compat_ipc64_perm {
124 compat_key_t key;
125 __compat_uid32_t uid;
126 __compat_gid32_t gid;
127 __compat_uid32_t cuid;
128 __compat_gid32_t cgid;
129 unsigned short mode;
130 unsigned short __pad1;
131 unsigned short seq;
132 unsigned short __pad2;
133 compat_ulong_t unused1;
134 compat_ulong_t unused2;
135};
136
137struct compat_semid64_ds {
138 struct compat_ipc64_perm sem_perm;
139 compat_ulong_t sem_otime;
140 compat_ulong_t sem_otime_high;
141 compat_ulong_t sem_ctime;
142 compat_ulong_t sem_ctime_high;
143 compat_ulong_t sem_nsems;
144 compat_ulong_t __unused3;
145 compat_ulong_t __unused4;
146};
147
148struct compat_msqid64_ds {
149 struct compat_ipc64_perm msg_perm;
150 compat_ulong_t msg_stime;
151 compat_ulong_t msg_stime_high;
152 compat_ulong_t msg_rtime;
153 compat_ulong_t msg_rtime_high;
154 compat_ulong_t msg_ctime;
155 compat_ulong_t msg_ctime_high;
156 compat_ulong_t msg_cbytes;
157 compat_ulong_t msg_qnum;
158 compat_ulong_t msg_qbytes;
159 compat_pid_t msg_lspid;
160 compat_pid_t msg_lrpid;
161 compat_ulong_t __unused4;
162 compat_ulong_t __unused5;
163};
164
165struct compat_shmid64_ds {
166 struct compat_ipc64_perm shm_perm;
167 compat_size_t shm_segsz;
168 compat_ulong_t shm_atime;
169 compat_ulong_t shm_atime_high;
170 compat_ulong_t shm_dtime;
171 compat_ulong_t shm_dtime_high;
172 compat_ulong_t shm_ctime;
173 compat_ulong_t shm_ctime_high;
174 compat_pid_t shm_cpid;
175 compat_pid_t shm_lpid;
176 compat_ulong_t shm_nattch;
177 compat_ulong_t __unused4;
178 compat_ulong_t __unused5;
179};
180
181static inline int is_compat_task(void)
182{
183 return test_thread_flag(TIF_32BIT);
184}
185
186static inline int is_compat_thread(struct thread_info *thread)
187{
188 return test_ti_thread_flag(thread, TIF_32BIT);
189}
190
191#else /* !CONFIG_COMPAT */
192
193static inline int is_compat_thread(struct thread_info *thread)
194{
195 return 0;
196}
197
198#endif /* CONFIG_COMPAT */
199#endif /* __ASM_COMPAT_H */