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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#ifdef __KERNEL__
8#ifdef CONFIG_COMPAT
9
10/*
11 * Architecture specific compatibility types
12 */
13#include <linux/types.h>
14#include <linux/sched.h>
15#include <linux/sched/task_stack.h>
16
17#include <asm-generic/compat.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;
38typedef s64 compat_s64;
39typedef u64 compat_u64;
40
41struct compat_stat {
42#ifdef __AARCH64EB__
43 short st_dev;
44 short __pad1;
45#else
46 compat_dev_t st_dev;
47#endif
48 compat_ino_t st_ino;
49 compat_mode_t st_mode;
50 compat_ushort_t st_nlink;
51 __compat_uid16_t st_uid;
52 __compat_gid16_t st_gid;
53#ifdef __AARCH64EB__
54 short st_rdev;
55 short __pad2;
56#else
57 compat_dev_t st_rdev;
58#endif
59 compat_off_t st_size;
60 compat_off_t st_blksize;
61 compat_off_t st_blocks;
62 old_time32_t st_atime;
63 compat_ulong_t st_atime_nsec;
64 old_time32_t st_mtime;
65 compat_ulong_t st_mtime_nsec;
66 old_time32_t st_ctime;
67 compat_ulong_t st_ctime_nsec;
68 compat_ulong_t __unused4[2];
69};
70
71struct compat_flock {
72 short l_type;
73 short l_whence;
74 compat_off_t l_start;
75 compat_off_t l_len;
76 compat_pid_t l_pid;
77};
78
79#define F_GETLK64 12 /* using 'struct flock64' */
80#define F_SETLK64 13
81#define F_SETLKW64 14
82
83struct compat_flock64 {
84 short l_type;
85 short l_whence;
86 compat_loff_t l_start;
87 compat_loff_t l_len;
88 compat_pid_t l_pid;
89};
90
91struct compat_statfs {
92 int f_type;
93 int f_bsize;
94 int f_blocks;
95 int f_bfree;
96 int f_bavail;
97 int f_files;
98 int f_ffree;
99 compat_fsid_t f_fsid;
100 int f_namelen; /* SunOS ignores this field. */
101 int f_frsize;
102 int f_flags;
103 int f_spare[4];
104};
105
106#define COMPAT_RLIM_INFINITY 0xffffffff
107
108typedef u32 compat_old_sigset_t;
109
110#define _COMPAT_NSIG 64
111#define _COMPAT_NSIG_BPW 32
112
113typedef u32 compat_sigset_word;
114
115#define COMPAT_OFF_T_MAX 0x7fffffff
116
117/*
118 * A pointer passed in from user mode. This should not
119 * be used for syscall parameters, just declare them
120 * as pointers because the syscall entry code will have
121 * appropriately converted them already.
122 */
123
124static inline void __user *compat_ptr(compat_uptr_t uptr)
125{
126 return (void __user *)(unsigned long)uptr;
127}
128
129static inline compat_uptr_t ptr_to_compat(void __user *uptr)
130{
131 return (u32)(unsigned long)uptr;
132}
133
134#define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
135#define COMPAT_MINSIGSTKSZ 2048
136
137static inline void __user *arch_compat_alloc_user_space(long len)
138{
139 return (void __user *)compat_user_stack_pointer() - len;
140}
141
142struct compat_ipc64_perm {
143 compat_key_t key;
144 __compat_uid32_t uid;
145 __compat_gid32_t gid;
146 __compat_uid32_t cuid;
147 __compat_gid32_t cgid;
148 unsigned short mode;
149 unsigned short __pad1;
150 unsigned short seq;
151 unsigned short __pad2;
152 compat_ulong_t unused1;
153 compat_ulong_t unused2;
154};
155
156struct compat_semid64_ds {
157 struct compat_ipc64_perm sem_perm;
158 compat_ulong_t sem_otime;
159 compat_ulong_t sem_otime_high;
160 compat_ulong_t sem_ctime;
161 compat_ulong_t sem_ctime_high;
162 compat_ulong_t sem_nsems;
163 compat_ulong_t __unused3;
164 compat_ulong_t __unused4;
165};
166
167struct compat_msqid64_ds {
168 struct compat_ipc64_perm msg_perm;
169 compat_ulong_t msg_stime;
170 compat_ulong_t msg_stime_high;
171 compat_ulong_t msg_rtime;
172 compat_ulong_t msg_rtime_high;
173 compat_ulong_t msg_ctime;
174 compat_ulong_t msg_ctime_high;
175 compat_ulong_t msg_cbytes;
176 compat_ulong_t msg_qnum;
177 compat_ulong_t msg_qbytes;
178 compat_pid_t msg_lspid;
179 compat_pid_t msg_lrpid;
180 compat_ulong_t __unused4;
181 compat_ulong_t __unused5;
182};
183
184struct compat_shmid64_ds {
185 struct compat_ipc64_perm shm_perm;
186 compat_size_t shm_segsz;
187 compat_ulong_t shm_atime;
188 compat_ulong_t shm_atime_high;
189 compat_ulong_t shm_dtime;
190 compat_ulong_t shm_dtime_high;
191 compat_ulong_t shm_ctime;
192 compat_ulong_t shm_ctime_high;
193 compat_pid_t shm_cpid;
194 compat_pid_t shm_lpid;
195 compat_ulong_t shm_nattch;
196 compat_ulong_t __unused4;
197 compat_ulong_t __unused5;
198};
199
200static inline int is_compat_task(void)
201{
202 return test_thread_flag(TIF_32BIT);
203}
204
205static inline int is_compat_thread(struct thread_info *thread)
206{
207 return test_ti_thread_flag(thread, TIF_32BIT);
208}
209
210#else /* !CONFIG_COMPAT */
211
212static inline int is_compat_thread(struct thread_info *thread)
213{
214 return 0;
215}
216
217#endif /* CONFIG_COMPAT */
218#endif /* __KERNEL__ */
219#endif /* __ASM_COMPAT_H */