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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1965aae3 PA |
2 | #ifndef _ASM_X86_COMPAT_H |
3 | #define _ASM_X86_COMPAT_H | |
1da177e4 LT |
4 | |
5 | /* | |
6 | * Architecture specific compatibility types | |
7 | */ | |
8 | #include <linux/types.h> | |
9 | #include <linux/sched.h> | |
d375cf15 | 10 | #include <linux/sched/task_stack.h> |
d1a797f3 | 11 | #include <asm/processor.h> |
95d1b8f9 | 12 | #include <asm/user32.h> |
fca460f9 | 13 | #include <asm/unistd.h> |
1da177e4 | 14 | |
e28cbf22 CH |
15 | #define COMPAT_USER_HZ 100 |
16 | #define COMPAT_UTS_MACHINE "i686\0\0" | |
1da177e4 LT |
17 | |
18 | typedef u32 compat_size_t; | |
19 | typedef s32 compat_ssize_t; | |
1da177e4 LT |
20 | typedef s32 compat_clock_t; |
21 | typedef s32 compat_pid_t; | |
202e5979 SR |
22 | typedef u16 __compat_uid_t; |
23 | typedef u16 __compat_gid_t; | |
24 | typedef u32 __compat_uid32_t; | |
25 | typedef u32 __compat_gid32_t; | |
1da177e4 LT |
26 | typedef u16 compat_mode_t; |
27 | typedef u32 compat_ino_t; | |
28 | typedef u16 compat_dev_t; | |
29 | typedef s32 compat_off_t; | |
30 | typedef s64 compat_loff_t; | |
31 | typedef u16 compat_nlink_t; | |
32 | typedef u16 compat_ipc_pid_t; | |
33 | typedef s32 compat_daddr_t; | |
34 | typedef u32 compat_caddr_t; | |
35 | typedef __kernel_fsid_t compat_fsid_t; | |
36 | typedef s32 compat_timer_t; | |
37 | typedef s32 compat_key_t; | |
38 | ||
39 | typedef s32 compat_int_t; | |
40 | typedef s32 compat_long_t; | |
4b777587 | 41 | typedef s64 __attribute__((aligned(4))) compat_s64; |
1da177e4 LT |
42 | typedef u32 compat_uint_t; |
43 | typedef u32 compat_ulong_t; | |
a4455082 | 44 | typedef u32 compat_u32; |
4b777587 | 45 | typedef u64 __attribute__((aligned(4))) compat_u64; |
751f409d | 46 | typedef u32 compat_uptr_t; |
1da177e4 | 47 | |
1da177e4 LT |
48 | struct compat_stat { |
49 | compat_dev_t st_dev; | |
50 | u16 __pad1; | |
51 | compat_ino_t st_ino; | |
52 | compat_mode_t st_mode; | |
53 | compat_nlink_t st_nlink; | |
202e5979 SR |
54 | __compat_uid_t st_uid; |
55 | __compat_gid_t st_gid; | |
1da177e4 LT |
56 | compat_dev_t st_rdev; |
57 | u16 __pad2; | |
58 | u32 st_size; | |
59 | u32 st_blksize; | |
60 | u32 st_blocks; | |
61 | u32 st_atime; | |
62 | u32 st_atime_nsec; | |
63 | u32 st_mtime; | |
64 | u32 st_mtime_nsec; | |
65 | u32 st_ctime; | |
66 | u32 st_ctime_nsec; | |
67 | u32 __unused4; | |
68 | u32 __unused5; | |
69 | }; | |
70 | ||
71 | struct compat_flock { | |
72 | short l_type; | |
73 | short l_whence; | |
74 | compat_off_t l_start; | |
75 | compat_off_t l_len; | |
76 | compat_pid_t l_pid; | |
77 | }; | |
78 | ||
79 | #define F_GETLK64 12 /* using 'struct flock64' */ | |
80 | #define F_SETLK64 13 | |
81 | #define F_SETLKW64 14 | |
82 | ||
83 | /* | |
84 | * IA32 uses 4 byte alignment for 64 bit quantities, | |
85 | * so we need to pack this structure. | |
86 | */ | |
87 | struct compat_flock64 { | |
88 | short l_type; | |
89 | short l_whence; | |
90 | compat_loff_t l_start; | |
91 | compat_loff_t l_len; | |
92 | compat_pid_t l_pid; | |
93 | } __attribute__((packed)); | |
94 | ||
95 | struct compat_statfs { | |
96 | int f_type; | |
97 | int f_bsize; | |
98 | int f_blocks; | |
99 | int f_bfree; | |
100 | int f_bavail; | |
101 | int f_files; | |
102 | int f_ffree; | |
103 | compat_fsid_t f_fsid; | |
104 | int f_namelen; /* SunOS ignores this field. */ | |
105 | int f_frsize; | |
1448c721 EB |
106 | int f_flags; |
107 | int f_spare[4]; | |
1da177e4 LT |
108 | }; |
109 | ||
1da177e4 LT |
110 | #define COMPAT_RLIM_INFINITY 0xffffffff |
111 | ||
112 | typedef u32 compat_old_sigset_t; /* at least 32 bits */ | |
113 | ||
114 | #define _COMPAT_NSIG 64 | |
115 | #define _COMPAT_NSIG_BPW 32 | |
116 | ||
117 | typedef u32 compat_sigset_word; | |
118 | ||
119 | #define COMPAT_OFF_T_MAX 0x7fffffff | |
1da177e4 LT |
120 | |
121 | struct compat_ipc64_perm { | |
122 | compat_key_t key; | |
202e5979 SR |
123 | __compat_uid32_t uid; |
124 | __compat_gid32_t gid; | |
125 | __compat_uid32_t cuid; | |
126 | __compat_gid32_t cgid; | |
1da177e4 LT |
127 | unsigned short mode; |
128 | unsigned short __pad1; | |
129 | unsigned short seq; | |
130 | unsigned short __pad2; | |
131 | compat_ulong_t unused1; | |
132 | compat_ulong_t unused2; | |
133 | }; | |
134 | ||
135 | struct compat_semid64_ds { | |
136 | struct compat_ipc64_perm sem_perm; | |
c039dbd5 AB |
137 | compat_ulong_t sem_otime; |
138 | compat_ulong_t sem_otime_high; | |
139 | compat_ulong_t sem_ctime; | |
140 | compat_ulong_t sem_ctime_high; | |
1da177e4 LT |
141 | compat_ulong_t sem_nsems; |
142 | compat_ulong_t __unused3; | |
143 | compat_ulong_t __unused4; | |
144 | }; | |
145 | ||
146 | struct compat_msqid64_ds { | |
147 | struct compat_ipc64_perm msg_perm; | |
c039dbd5 AB |
148 | compat_ulong_t msg_stime; |
149 | compat_ulong_t msg_stime_high; | |
150 | compat_ulong_t msg_rtime; | |
151 | compat_ulong_t msg_rtime_high; | |
152 | compat_ulong_t msg_ctime; | |
153 | compat_ulong_t msg_ctime_high; | |
1da177e4 LT |
154 | compat_ulong_t msg_cbytes; |
155 | compat_ulong_t msg_qnum; | |
156 | compat_ulong_t msg_qbytes; | |
157 | compat_pid_t msg_lspid; | |
158 | compat_pid_t msg_lrpid; | |
159 | compat_ulong_t __unused4; | |
160 | compat_ulong_t __unused5; | |
161 | }; | |
162 | ||
163 | struct compat_shmid64_ds { | |
164 | struct compat_ipc64_perm shm_perm; | |
165 | compat_size_t shm_segsz; | |
c039dbd5 AB |
166 | compat_ulong_t shm_atime; |
167 | compat_ulong_t shm_atime_high; | |
168 | compat_ulong_t shm_dtime; | |
169 | compat_ulong_t shm_dtime_high; | |
170 | compat_ulong_t shm_ctime; | |
171 | compat_ulong_t shm_ctime_high; | |
1da177e4 LT |
172 | compat_pid_t shm_cpid; |
173 | compat_pid_t shm_lpid; | |
174 | compat_ulong_t shm_nattch; | |
175 | compat_ulong_t __unused4; | |
176 | compat_ulong_t __unused5; | |
177 | }; | |
178 | ||
95d1b8f9 RM |
179 | /* |
180 | * The type of struct elf_prstatus.pr_reg in compatible core dumps. | |
181 | */ | |
d1a797f3 PA |
182 | typedef struct user_regs_struct compat_elf_gregset_t; |
183 | ||
90954e7b DS |
184 | /* Full regset -- prstatus on x32, otherwise on ia32 */ |
185 | #define PRSTATUS_SIZE(S, R) (R != sizeof(S.pr_reg) ? 144 : 296) | |
186 | #define SET_PR_FPVALID(S, V, R) \ | |
187 | do { *(int *) (((void *) &((S)->pr_reg)) + R) = (V); } \ | |
d1a797f3 PA |
188 | while (0) |
189 | ||
7b2dd368 | 190 | #ifdef CONFIG_X86_X32_ABI |
d1a797f3 PA |
191 | #define COMPAT_USE_64BIT_TIME \ |
192 | (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)) | |
d1a797f3 | 193 | #endif |
95d1b8f9 | 194 | |
1da177e4 LT |
195 | /* |
196 | * A pointer passed in from user mode. This should not | |
197 | * be used for syscall parameters, just declare them | |
198 | * as pointers because the syscall entry code will have | |
8b3de0df | 199 | * appropriately converted them already. |
1da177e4 | 200 | */ |
1da177e4 LT |
201 | |
202 | static inline void __user *compat_ptr(compat_uptr_t uptr) | |
203 | { | |
204 | return (void __user *)(unsigned long)uptr; | |
205 | } | |
206 | ||
207 | static inline compat_uptr_t ptr_to_compat(void __user *uptr) | |
208 | { | |
209 | return (u32)(unsigned long)uptr; | |
210 | } | |
211 | ||
c41d68a5 | 212 | static inline void __user *arch_compat_alloc_user_space(long len) |
1da177e4 | 213 | { |
d1a797f3 PA |
214 | compat_uptr_t sp; |
215 | ||
216 | if (test_thread_flag(TIF_IA32)) { | |
217 | sp = task_pt_regs(current)->sp; | |
218 | } else { | |
219 | /* -128 for the x32 ABI redzone */ | |
263042e4 | 220 | sp = task_pt_regs(current)->sp - 128; |
d1a797f3 PA |
221 | } |
222 | ||
223 | return (void __user *)round_down(sp - len, 16); | |
1da177e4 LT |
224 | } |
225 | ||
abfb9498 | 226 | static inline bool in_x32_syscall(void) |
a628b684 | 227 | { |
fca460f9 PA |
228 | #ifdef CONFIG_X86_X32_ABI |
229 | if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT) | |
230 | return true; | |
231 | #endif | |
232 | return false; | |
bf2fcc6f AK |
233 | } |
234 | ||
f970165b | 235 | static inline bool in_compat_syscall(void) |
a628b684 | 236 | { |
abfb9498 | 237 | return in_ia32_syscall() || in_x32_syscall(); |
a628b684 | 238 | } |
f970165b | 239 | #define in_compat_syscall in_compat_syscall /* override the generic impl */ |
a628b684 | 240 | |
ea64d5ac EB |
241 | struct compat_siginfo; |
242 | int __copy_siginfo_to_user32(struct compat_siginfo __user *to, | |
243 | const siginfo_t *from, bool x32_ABI); | |
244 | ||
1965aae3 | 245 | #endif /* _ASM_X86_COMPAT_H */ |