1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_COMPAT_H
3 #define _ASM_X86_COMPAT_H
4 
5 /*
6  * Architecture specific compatibility types
7  */
8 #include <linux/types.h>
9 #include <linux/sched.h>
10 #include <linux/sched/task_stack.h>
11 #include <asm/processor.h>
12 #include <asm/user32.h>
13 #include <asm/unistd.h>
14 
15 #define compat_mode_t	compat_mode_t
16 typedef u16		compat_mode_t;
17 
18 #include <asm-generic/compat.h>
19 
20 #define COMPAT_USER_HZ		100
21 #define COMPAT_UTS_MACHINE	"i686\0\0"
22 
23 typedef u16		__compat_uid_t;
24 typedef u16		__compat_gid_t;
25 typedef u16		compat_dev_t;
26 typedef u16		compat_nlink_t;
27 typedef u16		compat_ipc_pid_t;
28 typedef __kernel_fsid_t	compat_fsid_t;
29 
30 struct compat_stat {
31 	compat_dev_t	st_dev;
32 	u16		__pad1;
33 	compat_ino_t	st_ino;
34 	compat_mode_t	st_mode;
35 	compat_nlink_t	st_nlink;
36 	__compat_uid_t	st_uid;
37 	__compat_gid_t	st_gid;
38 	compat_dev_t	st_rdev;
39 	u16		__pad2;
40 	u32		st_size;
41 	u32		st_blksize;
42 	u32		st_blocks;
43 	u32		st_atime;
44 	u32		st_atime_nsec;
45 	u32		st_mtime;
46 	u32		st_mtime_nsec;
47 	u32		st_ctime;
48 	u32		st_ctime_nsec;
49 	u32		__unused4;
50 	u32		__unused5;
51 };
52 
53 struct compat_flock {
54 	short		l_type;
55 	short		l_whence;
56 	compat_off_t	l_start;
57 	compat_off_t	l_len;
58 	compat_pid_t	l_pid;
59 };
60 
61 #define F_GETLK64	12	/*  using 'struct flock64' */
62 #define F_SETLK64	13
63 #define F_SETLKW64	14
64 
65 /*
66  * IA32 uses 4 byte alignment for 64 bit quantities,
67  * so we need to pack this structure.
68  */
69 struct compat_flock64 {
70 	short		l_type;
71 	short		l_whence;
72 	compat_loff_t	l_start;
73 	compat_loff_t	l_len;
74 	compat_pid_t	l_pid;
75 } __attribute__((packed));
76 
77 struct compat_statfs {
78 	int		f_type;
79 	int		f_bsize;
80 	int		f_blocks;
81 	int		f_bfree;
82 	int		f_bavail;
83 	int		f_files;
84 	int		f_ffree;
85 	compat_fsid_t	f_fsid;
86 	int		f_namelen;	/* SunOS ignores this field. */
87 	int		f_frsize;
88 	int		f_flags;
89 	int		f_spare[4];
90 };
91 
92 #define COMPAT_RLIM_INFINITY		0xffffffff
93 
94 #define COMPAT_OFF_T_MAX	0x7fffffff
95 
96 struct compat_ipc64_perm {
97 	compat_key_t key;
98 	__compat_uid32_t uid;
99 	__compat_gid32_t gid;
100 	__compat_uid32_t cuid;
101 	__compat_gid32_t cgid;
102 	unsigned short mode;
103 	unsigned short __pad1;
104 	unsigned short seq;
105 	unsigned short __pad2;
106 	compat_ulong_t unused1;
107 	compat_ulong_t unused2;
108 };
109 
110 struct compat_semid64_ds {
111 	struct compat_ipc64_perm sem_perm;
112 	compat_ulong_t sem_otime;
113 	compat_ulong_t sem_otime_high;
114 	compat_ulong_t sem_ctime;
115 	compat_ulong_t sem_ctime_high;
116 	compat_ulong_t sem_nsems;
117 	compat_ulong_t __unused3;
118 	compat_ulong_t __unused4;
119 };
120 
121 struct compat_msqid64_ds {
122 	struct compat_ipc64_perm msg_perm;
123 	compat_ulong_t msg_stime;
124 	compat_ulong_t msg_stime_high;
125 	compat_ulong_t msg_rtime;
126 	compat_ulong_t msg_rtime_high;
127 	compat_ulong_t msg_ctime;
128 	compat_ulong_t msg_ctime_high;
129 	compat_ulong_t msg_cbytes;
130 	compat_ulong_t msg_qnum;
131 	compat_ulong_t msg_qbytes;
132 	compat_pid_t   msg_lspid;
133 	compat_pid_t   msg_lrpid;
134 	compat_ulong_t __unused4;
135 	compat_ulong_t __unused5;
136 };
137 
138 struct compat_shmid64_ds {
139 	struct compat_ipc64_perm shm_perm;
140 	compat_size_t  shm_segsz;
141 	compat_ulong_t shm_atime;
142 	compat_ulong_t shm_atime_high;
143 	compat_ulong_t shm_dtime;
144 	compat_ulong_t shm_dtime_high;
145 	compat_ulong_t shm_ctime;
146 	compat_ulong_t shm_ctime_high;
147 	compat_pid_t   shm_cpid;
148 	compat_pid_t   shm_lpid;
149 	compat_ulong_t shm_nattch;
150 	compat_ulong_t __unused4;
151 	compat_ulong_t __unused5;
152 };
153 
154 #ifdef CONFIG_X86_X32_ABI
155 #define COMPAT_USE_64BIT_TIME \
156 	(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
157 #endif
158 
in_x32_syscall(void)159 static inline bool in_x32_syscall(void)
160 {
161 #ifdef CONFIG_X86_X32_ABI
162 	if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
163 		return true;
164 #endif
165 	return false;
166 }
167 
in_32bit_syscall(void)168 static inline bool in_32bit_syscall(void)
169 {
170 	return in_ia32_syscall() || in_x32_syscall();
171 }
172 
173 #ifdef CONFIG_COMPAT
in_compat_syscall(void)174 static inline bool in_compat_syscall(void)
175 {
176 	return in_32bit_syscall();
177 }
178 #define in_compat_syscall in_compat_syscall	/* override the generic impl */
179 #define compat_need_64bit_alignment_fixup in_ia32_syscall
180 #endif
181 
182 struct compat_siginfo;
183 
184 #ifdef CONFIG_X86_X32_ABI
185 int copy_siginfo_to_user32(struct compat_siginfo __user *to,
186 		const kernel_siginfo_t *from);
187 #define copy_siginfo_to_user32 copy_siginfo_to_user32
188 #endif /* CONFIG_X86_X32_ABI */
189 
190 #endif /* _ASM_X86_COMPAT_H */
191