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1 #ifndef _ASM_X86_COMPAT_H
2 #define _ASM_X86_COMPAT_H
3 
4 /*
5  * Architecture specific compatibility types
6  */
7 #include <linux/types.h>
8 #include <linux/sched.h>
9 #include <asm/user32.h>
10 
11 #define COMPAT_USER_HZ	100
12 
13 typedef u32		compat_size_t;
14 typedef s32		compat_ssize_t;
15 typedef s32		compat_time_t;
16 typedef s32		compat_clock_t;
17 typedef s32		compat_pid_t;
18 typedef u16		__compat_uid_t;
19 typedef u16		__compat_gid_t;
20 typedef u32		__compat_uid32_t;
21 typedef u32		__compat_gid32_t;
22 typedef u16		compat_mode_t;
23 typedef u32		compat_ino_t;
24 typedef u16		compat_dev_t;
25 typedef s32		compat_off_t;
26 typedef s64		compat_loff_t;
27 typedef u16		compat_nlink_t;
28 typedef u16		compat_ipc_pid_t;
29 typedef s32		compat_daddr_t;
30 typedef u32		compat_caddr_t;
31 typedef __kernel_fsid_t	compat_fsid_t;
32 typedef s32		compat_timer_t;
33 typedef s32		compat_key_t;
34 
35 typedef s32		compat_int_t;
36 typedef s32		compat_long_t;
37 typedef s64 __attribute__((aligned(4))) compat_s64;
38 typedef u32		compat_uint_t;
39 typedef u32		compat_ulong_t;
40 typedef u64 __attribute__((aligned(4))) compat_u64;
41 
42 struct compat_timespec {
43 	compat_time_t	tv_sec;
44 	s32		tv_nsec;
45 };
46 
47 struct compat_timeval {
48 	compat_time_t	tv_sec;
49 	s32		tv_usec;
50 };
51 
52 struct compat_stat {
53 	compat_dev_t	st_dev;
54 	u16		__pad1;
55 	compat_ino_t	st_ino;
56 	compat_mode_t	st_mode;
57 	compat_nlink_t	st_nlink;
58 	__compat_uid_t	st_uid;
59 	__compat_gid_t	st_gid;
60 	compat_dev_t	st_rdev;
61 	u16		__pad2;
62 	u32		st_size;
63 	u32		st_blksize;
64 	u32		st_blocks;
65 	u32		st_atime;
66 	u32		st_atime_nsec;
67 	u32		st_mtime;
68 	u32		st_mtime_nsec;
69 	u32		st_ctime;
70 	u32		st_ctime_nsec;
71 	u32		__unused4;
72 	u32		__unused5;
73 };
74 
75 struct compat_flock {
76 	short		l_type;
77 	short		l_whence;
78 	compat_off_t	l_start;
79 	compat_off_t	l_len;
80 	compat_pid_t	l_pid;
81 };
82 
83 #define F_GETLK64	12	/*  using 'struct flock64' */
84 #define F_SETLK64	13
85 #define F_SETLKW64	14
86 
87 /*
88  * IA32 uses 4 byte alignment for 64 bit quantities,
89  * so we need to pack this structure.
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 } __attribute__((packed));
98 
99 struct compat_statfs {
100 	int		f_type;
101 	int		f_bsize;
102 	int		f_blocks;
103 	int		f_bfree;
104 	int		f_bavail;
105 	int		f_files;
106 	int		f_ffree;
107 	compat_fsid_t	f_fsid;
108 	int		f_namelen;	/* SunOS ignores this field. */
109 	int		f_frsize;
110 	int		f_spare[5];
111 };
112 
113 #define COMPAT_RLIM_OLD_INFINITY	0x7fffffff
114 #define COMPAT_RLIM_INFINITY		0xffffffff
115 
116 typedef u32		compat_old_sigset_t;	/* at least 32 bits */
117 
118 #define _COMPAT_NSIG		64
119 #define _COMPAT_NSIG_BPW	32
120 
121 typedef u32               compat_sigset_word;
122 
123 #define COMPAT_OFF_T_MAX	0x7fffffff
124 #define COMPAT_LOFF_T_MAX	0x7fffffffffffffffL
125 
126 struct compat_ipc64_perm {
127 	compat_key_t key;
128 	__compat_uid32_t uid;
129 	__compat_gid32_t gid;
130 	__compat_uid32_t cuid;
131 	__compat_gid32_t cgid;
132 	unsigned short mode;
133 	unsigned short __pad1;
134 	unsigned short seq;
135 	unsigned short __pad2;
136 	compat_ulong_t unused1;
137 	compat_ulong_t unused2;
138 };
139 
140 struct compat_semid64_ds {
141 	struct compat_ipc64_perm sem_perm;
142 	compat_time_t  sem_otime;
143 	compat_ulong_t __unused1;
144 	compat_time_t  sem_ctime;
145 	compat_ulong_t __unused2;
146 	compat_ulong_t sem_nsems;
147 	compat_ulong_t __unused3;
148 	compat_ulong_t __unused4;
149 };
150 
151 struct compat_msqid64_ds {
152 	struct compat_ipc64_perm msg_perm;
153 	compat_time_t  msg_stime;
154 	compat_ulong_t __unused1;
155 	compat_time_t  msg_rtime;
156 	compat_ulong_t __unused2;
157 	compat_time_t  msg_ctime;
158 	compat_ulong_t __unused3;
159 	compat_ulong_t msg_cbytes;
160 	compat_ulong_t msg_qnum;
161 	compat_ulong_t msg_qbytes;
162 	compat_pid_t   msg_lspid;
163 	compat_pid_t   msg_lrpid;
164 	compat_ulong_t __unused4;
165 	compat_ulong_t __unused5;
166 };
167 
168 struct compat_shmid64_ds {
169 	struct compat_ipc64_perm shm_perm;
170 	compat_size_t  shm_segsz;
171 	compat_time_t  shm_atime;
172 	compat_ulong_t __unused1;
173 	compat_time_t  shm_dtime;
174 	compat_ulong_t __unused2;
175 	compat_time_t  shm_ctime;
176 	compat_ulong_t __unused3;
177 	compat_pid_t   shm_cpid;
178 	compat_pid_t   shm_lpid;
179 	compat_ulong_t shm_nattch;
180 	compat_ulong_t __unused4;
181 	compat_ulong_t __unused5;
182 };
183 
184 /*
185  * The type of struct elf_prstatus.pr_reg in compatible core dumps.
186  */
187 typedef struct user_regs_struct32 compat_elf_gregset_t;
188 
189 /*
190  * A pointer passed in from user mode. This should not
191  * be used for syscall parameters, just declare them
192  * as pointers because the syscall entry code will have
193  * appropriately converted them already.
194  */
195 typedef	u32		compat_uptr_t;
196 
compat_ptr(compat_uptr_t uptr)197 static inline void __user *compat_ptr(compat_uptr_t uptr)
198 {
199 	return (void __user *)(unsigned long)uptr;
200 }
201 
ptr_to_compat(void __user * uptr)202 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
203 {
204 	return (u32)(unsigned long)uptr;
205 }
206 
compat_alloc_user_space(long len)207 static inline void __user *compat_alloc_user_space(long len)
208 {
209 	struct pt_regs *regs = task_pt_regs(current);
210 	return (void __user *)regs->sp - len;
211 }
212 
is_compat_task(void)213 static inline int is_compat_task(void)
214 {
215 	return current_thread_info()->status & TS_COMPAT;
216 }
217 
218 #endif /* _ASM_X86_COMPAT_H */
219