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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 CONFIG_COMPAT
8
9/*
10 * Architecture specific compatibility types
11 */
12#include <linux/types.h>
13#include <linux/sched.h>
14#include <linux/sched/task_stack.h>
15
16#include <asm-generic/compat.h>
17
18#define COMPAT_USER_HZ 100
19#ifdef __AARCH64EB__
20#define COMPAT_UTS_MACHINE "armv8b\0\0"
21#else
22#define COMPAT_UTS_MACHINE "armv8l\0\0"
23#endif
24
25typedef u16 __compat_uid_t;
26typedef u16 __compat_gid_t;
27typedef u16 __compat_uid16_t;
28typedef u16 __compat_gid16_t;
29typedef u32 __compat_uid32_t;
30typedef u32 __compat_gid32_t;
31typedef u16 compat_mode_t;
32typedef u32 compat_dev_t;
33typedef s32 compat_nlink_t;
34typedef u16 compat_ipc_pid_t;
35typedef u32 compat_caddr_t;
36typedef __kernel_fsid_t compat_fsid_t;
37typedef s64 compat_s64;
38typedef u64 compat_u64;
39
40struct compat_stat {
41#ifdef __AARCH64EB__
42 short st_dev;
43 short __pad1;
44#else
45 compat_dev_t st_dev;
46#endif
47 compat_ino_t st_ino;
48 compat_mode_t st_mode;
49 compat_ushort_t st_nlink;
50 __compat_uid16_t st_uid;
51 __compat_gid16_t st_gid;
52#ifdef __AARCH64EB__
53 short st_rdev;
54 short __pad2;
55#else
56 compat_dev_t st_rdev;
57#endif
58 compat_off_t st_size;
59 compat_off_t st_blksize;
60 compat_off_t st_blocks;
61 old_time32_t st_atime;
62 compat_ulong_t st_atime_nsec;
63 old_time32_t st_mtime;
64 compat_ulong_t st_mtime_nsec;
65 old_time32_t st_ctime;
66 compat_ulong_t st_ctime_nsec;
67 compat_ulong_t __unused4[2];
68};
69
70struct compat_flock {
71 short l_type;
72 short l_whence;
73 compat_off_t l_start;
74 compat_off_t l_len;
75 compat_pid_t l_pid;
76};
77
78#define F_GETLK64 12 /* using 'struct flock64' */
79#define F_SETLK64 13
80#define F_SETLKW64 14
81
82struct compat_flock64 {
83 short l_type;
84 short l_whence;
85 compat_loff_t l_start;
86 compat_loff_t l_len;
87 compat_pid_t l_pid;
88};
89
90struct compat_statfs {
91 int f_type;
92 int f_bsize;
93 int f_blocks;
94 int f_bfree;
95 int f_bavail;
96 int f_files;
97 int f_ffree;
98 compat_fsid_t f_fsid;
99 int f_namelen; /* SunOS ignores this field. */
100 int f_frsize;
101 int f_flags;
102 int f_spare[4];
103};
104
105#define COMPAT_RLIM_INFINITY 0xffffffff
106
107typedef u32 compat_old_sigset_t;
108
109#define _COMPAT_NSIG 64
110#define _COMPAT_NSIG_BPW 32
111
112typedef u32 compat_sigset_word;
113
114#define COMPAT_OFF_T_MAX 0x7fffffff
115
116/*
117 * A pointer passed in from user mode. This should not
118 * be used for syscall parameters, just declare them
119 * as pointers because the syscall entry code will have
120 * appropriately converted them already.
121 */
122
123static inline void __user *compat_ptr(compat_uptr_t uptr)
124{
125 return (void __user *)(unsigned long)uptr;
126}
127
128static inline compat_uptr_t ptr_to_compat(void __user *uptr)
129{
130 return (u32)(unsigned long)uptr;
131}
132
133#define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
134#define COMPAT_MINSIGSTKSZ 2048
135
136static inline void __user *arch_compat_alloc_user_space(long len)
137{
138 return (void __user *)compat_user_stack_pointer() - len;
139}
140
141struct compat_ipc64_perm {
142 compat_key_t key;
143 __compat_uid32_t uid;
144 __compat_gid32_t gid;
145 __compat_uid32_t cuid;
146 __compat_gid32_t cgid;
147 unsigned short mode;
148 unsigned short __pad1;
149 unsigned short seq;
150 unsigned short __pad2;
151 compat_ulong_t unused1;
152 compat_ulong_t unused2;
153};
154
155struct compat_semid64_ds {
156 struct compat_ipc64_perm sem_perm;
157 compat_ulong_t sem_otime;
158 compat_ulong_t sem_otime_high;
159 compat_ulong_t sem_ctime;
160 compat_ulong_t sem_ctime_high;
161 compat_ulong_t sem_nsems;
162 compat_ulong_t __unused3;
163 compat_ulong_t __unused4;
164};
165
166struct compat_msqid64_ds {
167 struct compat_ipc64_perm msg_perm;
168 compat_ulong_t msg_stime;
169 compat_ulong_t msg_stime_high;
170 compat_ulong_t msg_rtime;
171 compat_ulong_t msg_rtime_high;
172 compat_ulong_t msg_ctime;
173 compat_ulong_t msg_ctime_high;
174 compat_ulong_t msg_cbytes;
175 compat_ulong_t msg_qnum;
176 compat_ulong_t msg_qbytes;
177 compat_pid_t msg_lspid;
178 compat_pid_t msg_lrpid;
179 compat_ulong_t __unused4;
180 compat_ulong_t __unused5;
181};
182
183struct compat_shmid64_ds {
184 struct compat_ipc64_perm shm_perm;
185 compat_size_t shm_segsz;
186 compat_ulong_t shm_atime;
187 compat_ulong_t shm_atime_high;
188 compat_ulong_t shm_dtime;
189 compat_ulong_t shm_dtime_high;
190 compat_ulong_t shm_ctime;
191 compat_ulong_t shm_ctime_high;
192 compat_pid_t shm_cpid;
193 compat_pid_t shm_lpid;
194 compat_ulong_t shm_nattch;
195 compat_ulong_t __unused4;
196 compat_ulong_t __unused5;
197};
198
199static inline int is_compat_task(void)
200{
201 return test_thread_flag(TIF_32BIT);
202}
203
204static inline int is_compat_thread(struct thread_info *thread)
205{
206 return test_ti_thread_flag(thread, TIF_32BIT);
207}
208
209#else /* !CONFIG_COMPAT */
210
211static inline int is_compat_thread(struct thread_info *thread)
212{
213 return 0;
214}
215
216#endif /* CONFIG_COMPAT */
217#endif /* __ASM_COMPAT_H */
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#define __compat_uid_t __compat_uid_t
12typedef u16 __compat_uid_t;
13typedef u16 __compat_gid_t;
14
15#define compat_ipc_pid_t compat_ipc_pid_t
16typedef u16 compat_ipc_pid_t;
17
18#define compat_statfs compat_statfs
19
20#include <asm-generic/compat.h>
21
22#ifdef CONFIG_COMPAT
23
24/*
25 * Architecture specific compatibility types
26 */
27#include <linux/types.h>
28#include <linux/sched.h>
29#include <linux/sched/task_stack.h>
30
31#ifdef __AARCH64EB__
32#define COMPAT_UTS_MACHINE "armv8b\0\0"
33#else
34#define COMPAT_UTS_MACHINE "armv8l\0\0"
35#endif
36
37typedef u16 __compat_uid16_t;
38typedef u16 __compat_gid16_t;
39typedef s32 compat_nlink_t;
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_statfs {
72 int f_type;
73 int f_bsize;
74 int f_blocks;
75 int f_bfree;
76 int f_bavail;
77 int f_files;
78 int f_ffree;
79 compat_fsid_t f_fsid;
80 int f_namelen; /* SunOS ignores this field. */
81 int f_frsize;
82 int f_flags;
83 int f_spare[4];
84};
85
86#define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current)))
87#define COMPAT_MINSIGSTKSZ 2048
88
89static inline int is_compat_task(void)
90{
91 return test_thread_flag(TIF_32BIT);
92}
93
94static inline int is_compat_thread(struct thread_info *thread)
95{
96 return test_ti_thread_flag(thread, TIF_32BIT);
97}
98
99long compat_arm_syscall(struct pt_regs *regs, int scno);
100
101#else /* !CONFIG_COMPAT */
102
103static inline int is_compat_thread(struct thread_info *thread)
104{
105 return 0;
106}
107
108#endif /* CONFIG_COMPAT */
109#endif /* __ASM_COMPAT_H */