xref: /openbmc/linux/arch/sparc/include/asm/compat.h (revision ee7da21a)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_SPARC64_COMPAT_H
3 #define _ASM_SPARC64_COMPAT_H
4 /*
5  * Architecture specific compatibility types
6  */
7 #include <linux/types.h>
8 
9 #define compat_mode_t	compat_mode_t
10 typedef u16		compat_mode_t;
11 
12 #include <asm-generic/compat.h>
13 
14 #define COMPAT_USER_HZ		100
15 #define COMPAT_UTS_MACHINE	"sparc\0\0"
16 
17 typedef u16		__compat_uid_t;
18 typedef u16		__compat_gid_t;
19 typedef u16		compat_dev_t;
20 typedef s16		compat_nlink_t;
21 typedef u16		compat_ipc_pid_t;
22 typedef __kernel_fsid_t	compat_fsid_t;
23 
24 struct compat_stat {
25 	compat_dev_t	st_dev;
26 	compat_ino_t	st_ino;
27 	compat_mode_t	st_mode;
28 	compat_nlink_t	st_nlink;
29 	__compat_uid_t	st_uid;
30 	__compat_gid_t	st_gid;
31 	compat_dev_t	st_rdev;
32 	compat_off_t	st_size;
33 	old_time32_t	st_atime;
34 	compat_ulong_t	st_atime_nsec;
35 	old_time32_t	st_mtime;
36 	compat_ulong_t	st_mtime_nsec;
37 	old_time32_t	st_ctime;
38 	compat_ulong_t	st_ctime_nsec;
39 	compat_off_t	st_blksize;
40 	compat_off_t	st_blocks;
41 	u32		__unused4[2];
42 };
43 
44 struct compat_stat64 {
45 	unsigned long long	st_dev;
46 
47 	unsigned long long	st_ino;
48 
49 	unsigned int	st_mode;
50 	unsigned int	st_nlink;
51 
52 	unsigned int	st_uid;
53 	unsigned int	st_gid;
54 
55 	unsigned long long	st_rdev;
56 
57 	unsigned char	__pad3[8];
58 
59 	long long	st_size;
60 	unsigned int	st_blksize;
61 
62 	unsigned char	__pad4[8];
63 	unsigned int	st_blocks;
64 
65 	unsigned int	st_atime;
66 	unsigned int	st_atime_nsec;
67 
68 	unsigned int	st_mtime;
69 	unsigned int	st_mtime_nsec;
70 
71 	unsigned int	st_ctime;
72 	unsigned int	st_ctime_nsec;
73 
74 	unsigned int	__unused4;
75 	unsigned int	__unused5;
76 };
77 
78 struct compat_flock {
79 	short		l_type;
80 	short		l_whence;
81 	compat_off_t	l_start;
82 	compat_off_t	l_len;
83 	compat_pid_t	l_pid;
84 	short		__unused;
85 };
86 
87 #define F_GETLK64	12
88 #define F_SETLK64	13
89 #define F_SETLKW64	14
90 
91 struct compat_flock64 {
92 	short		l_type;
93 	short		l_whence;
94 	compat_loff_t	l_start;
95 	compat_loff_t	l_len;
96 	compat_pid_t	l_pid;
97 	short		__unused;
98 };
99 
100 struct compat_statfs {
101 	int		f_type;
102 	int		f_bsize;
103 	int		f_blocks;
104 	int		f_bfree;
105 	int		f_bavail;
106 	int		f_files;
107 	int		f_ffree;
108 	compat_fsid_t	f_fsid;
109 	int		f_namelen;	/* SunOS ignores this field. */
110 	int		f_frsize;
111 	int		f_flags;
112 	int		f_spare[4];
113 };
114 
115 #define COMPAT_RLIM_INFINITY 0x7fffffff
116 
117 #define COMPAT_OFF_T_MAX	0x7fffffff
118 
119 #ifdef CONFIG_COMPAT
120 static inline void __user *arch_compat_alloc_user_space(long len)
121 {
122 	struct pt_regs *regs = current_thread_info()->kregs;
123 	unsigned long usp = regs->u_regs[UREG_I6];
124 
125 	if (test_thread_64bit_stack(usp))
126 		usp += STACK_BIAS;
127 
128 	if (test_thread_flag(TIF_32BIT))
129 		usp &= 0xffffffffUL;
130 
131 	usp -= len;
132 	usp &= ~0x7UL;
133 
134 	return (void __user *) usp;
135 }
136 #endif
137 
138 struct compat_ipc64_perm {
139 	compat_key_t key;
140 	__compat_uid32_t uid;
141 	__compat_gid32_t gid;
142 	__compat_uid32_t cuid;
143 	__compat_gid32_t cgid;
144 	unsigned short __pad1;
145 	compat_mode_t mode;
146 	unsigned short __pad2;
147 	unsigned short seq;
148 	unsigned long __unused1;	/* yes they really are 64bit pads */
149 	unsigned long __unused2;
150 };
151 
152 struct compat_semid64_ds {
153 	struct compat_ipc64_perm sem_perm;
154 	unsigned int	sem_otime_high;
155 	unsigned int	sem_otime;
156 	unsigned int	sem_ctime_high;
157 	unsigned int	sem_ctime;
158 	u32		sem_nsems;
159 	u32		__unused1;
160 	u32		__unused2;
161 };
162 
163 struct compat_msqid64_ds {
164 	struct compat_ipc64_perm msg_perm;
165 	unsigned int	msg_stime_high;
166 	unsigned int	msg_stime;
167 	unsigned int	msg_rtime_high;
168 	unsigned int	msg_rtime;
169 	unsigned int	msg_ctime_high;
170 	unsigned int	msg_ctime;
171 	unsigned int	msg_cbytes;
172 	unsigned int	msg_qnum;
173 	unsigned int	msg_qbytes;
174 	compat_pid_t	msg_lspid;
175 	compat_pid_t	msg_lrpid;
176 	unsigned int	__unused1;
177 	unsigned int	__unused2;
178 };
179 
180 struct compat_shmid64_ds {
181 	struct compat_ipc64_perm shm_perm;
182 	unsigned int	shm_atime_high;
183 	unsigned int	shm_atime;
184 	unsigned int	shm_dtime_high;
185 	unsigned int	shm_dtime;
186 	unsigned int	shm_ctime_high;
187 	unsigned int	shm_ctime;
188 	compat_size_t	shm_segsz;
189 	compat_pid_t	shm_cpid;
190 	compat_pid_t	shm_lpid;
191 	unsigned int	shm_nattch;
192 	unsigned int	__unused1;
193 	unsigned int	__unused2;
194 };
195 
196 #ifdef CONFIG_COMPAT
197 static inline int is_compat_task(void)
198 {
199 	return test_thread_flag(TIF_32BIT);
200 }
201 
202 static inline bool in_compat_syscall(void)
203 {
204 	/* Vector 0x110 is LINUX_32BIT_SYSCALL_TRAP */
205 	return pt_regs_trap_type(current_pt_regs()) == 0x110;
206 }
207 #define in_compat_syscall in_compat_syscall
208 #endif
209 
210 #endif /* _ASM_SPARC64_COMPAT_H */
211