This source file includes following definitions.
- compat_ptr
- ptr_to_compat
- arch_compat_alloc_user_space
- in_x32_syscall
- in_32bit_syscall
- in_compat_syscall
1
2 #ifndef _ASM_X86_COMPAT_H
3 #define _ASM_X86_COMPAT_H
4
5
6
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 #include <asm-generic/compat.h>
16
17 #define COMPAT_USER_HZ 100
18 #define COMPAT_UTS_MACHINE "i686\0\0"
19
20 typedef u16 __compat_uid_t;
21 typedef u16 __compat_gid_t;
22 typedef u32 __compat_uid32_t;
23 typedef u32 __compat_gid32_t;
24 typedef u16 compat_mode_t;
25 typedef u16 compat_dev_t;
26 typedef u16 compat_nlink_t;
27 typedef u16 compat_ipc_pid_t;
28 typedef u32 compat_caddr_t;
29 typedef __kernel_fsid_t compat_fsid_t;
30 typedef s64 __attribute__((aligned(4))) compat_s64;
31 typedef u64 __attribute__((aligned(4))) compat_u64;
32
33 struct compat_stat {
34 compat_dev_t st_dev;
35 u16 __pad1;
36 compat_ino_t st_ino;
37 compat_mode_t st_mode;
38 compat_nlink_t st_nlink;
39 __compat_uid_t st_uid;
40 __compat_gid_t st_gid;
41 compat_dev_t st_rdev;
42 u16 __pad2;
43 u32 st_size;
44 u32 st_blksize;
45 u32 st_blocks;
46 u32 st_atime;
47 u32 st_atime_nsec;
48 u32 st_mtime;
49 u32 st_mtime_nsec;
50 u32 st_ctime;
51 u32 st_ctime_nsec;
52 u32 __unused4;
53 u32 __unused5;
54 };
55
56 struct compat_flock {
57 short l_type;
58 short l_whence;
59 compat_off_t l_start;
60 compat_off_t l_len;
61 compat_pid_t l_pid;
62 };
63
64 #define F_GETLK64 12
65 #define F_SETLK64 13
66 #define F_SETLKW64 14
67
68
69
70
71
72 struct compat_flock64 {
73 short l_type;
74 short l_whence;
75 compat_loff_t l_start;
76 compat_loff_t l_len;
77 compat_pid_t l_pid;
78 } __attribute__((packed));
79
80 struct compat_statfs {
81 int f_type;
82 int f_bsize;
83 int f_blocks;
84 int f_bfree;
85 int f_bavail;
86 int f_files;
87 int f_ffree;
88 compat_fsid_t f_fsid;
89 int f_namelen;
90 int f_frsize;
91 int f_flags;
92 int f_spare[4];
93 };
94
95 #define COMPAT_RLIM_INFINITY 0xffffffff
96
97 typedef u32 compat_old_sigset_t;
98
99 #define _COMPAT_NSIG 64
100 #define _COMPAT_NSIG_BPW 32
101
102 typedef u32 compat_sigset_word;
103
104 #define COMPAT_OFF_T_MAX 0x7fffffff
105
106 struct compat_ipc64_perm {
107 compat_key_t key;
108 __compat_uid32_t uid;
109 __compat_gid32_t gid;
110 __compat_uid32_t cuid;
111 __compat_gid32_t cgid;
112 unsigned short mode;
113 unsigned short __pad1;
114 unsigned short seq;
115 unsigned short __pad2;
116 compat_ulong_t unused1;
117 compat_ulong_t unused2;
118 };
119
120 struct compat_semid64_ds {
121 struct compat_ipc64_perm sem_perm;
122 compat_ulong_t sem_otime;
123 compat_ulong_t sem_otime_high;
124 compat_ulong_t sem_ctime;
125 compat_ulong_t sem_ctime_high;
126 compat_ulong_t sem_nsems;
127 compat_ulong_t __unused3;
128 compat_ulong_t __unused4;
129 };
130
131 struct compat_msqid64_ds {
132 struct compat_ipc64_perm msg_perm;
133 compat_ulong_t msg_stime;
134 compat_ulong_t msg_stime_high;
135 compat_ulong_t msg_rtime;
136 compat_ulong_t msg_rtime_high;
137 compat_ulong_t msg_ctime;
138 compat_ulong_t msg_ctime_high;
139 compat_ulong_t msg_cbytes;
140 compat_ulong_t msg_qnum;
141 compat_ulong_t msg_qbytes;
142 compat_pid_t msg_lspid;
143 compat_pid_t msg_lrpid;
144 compat_ulong_t __unused4;
145 compat_ulong_t __unused5;
146 };
147
148 struct compat_shmid64_ds {
149 struct compat_ipc64_perm shm_perm;
150 compat_size_t shm_segsz;
151 compat_ulong_t shm_atime;
152 compat_ulong_t shm_atime_high;
153 compat_ulong_t shm_dtime;
154 compat_ulong_t shm_dtime_high;
155 compat_ulong_t shm_ctime;
156 compat_ulong_t shm_ctime_high;
157 compat_pid_t shm_cpid;
158 compat_pid_t shm_lpid;
159 compat_ulong_t shm_nattch;
160 compat_ulong_t __unused4;
161 compat_ulong_t __unused5;
162 };
163
164
165
166
167 typedef struct user_regs_struct compat_elf_gregset_t;
168
169
170 #define PRSTATUS_SIZE(S, R) (R != sizeof(S.pr_reg) ? 144 : 296)
171 #define SET_PR_FPVALID(S, V, R) \
172 do { *(int *) (((void *) &((S)->pr_reg)) + R) = (V); } \
173 while (0)
174
175 #ifdef CONFIG_X86_X32_ABI
176 #define COMPAT_USE_64BIT_TIME \
177 (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
178 #endif
179
180
181
182
183
184
185
186
187 static inline void __user *compat_ptr(compat_uptr_t uptr)
188 {
189 return (void __user *)(unsigned long)uptr;
190 }
191
192 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
193 {
194 return (u32)(unsigned long)uptr;
195 }
196
197 static inline void __user *arch_compat_alloc_user_space(long len)
198 {
199 compat_uptr_t sp;
200
201 if (test_thread_flag(TIF_IA32)) {
202 sp = task_pt_regs(current)->sp;
203 } else {
204
205 sp = task_pt_regs(current)->sp - 128;
206 }
207
208 return (void __user *)round_down(sp - len, 16);
209 }
210
211 static inline bool in_x32_syscall(void)
212 {
213 #ifdef CONFIG_X86_X32_ABI
214 if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
215 return true;
216 #endif
217 return false;
218 }
219
220 static inline bool in_32bit_syscall(void)
221 {
222 return in_ia32_syscall() || in_x32_syscall();
223 }
224
225 #ifdef CONFIG_COMPAT
226 static inline bool in_compat_syscall(void)
227 {
228 return in_32bit_syscall();
229 }
230 #define in_compat_syscall in_compat_syscall
231 #endif
232
233 struct compat_siginfo;
234 int __copy_siginfo_to_user32(struct compat_siginfo __user *to,
235 const kernel_siginfo_t *from, bool x32_ABI);
236
237 #endif