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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
16typedef 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
23typedef u16 __compat_uid_t;
24typedef u16 __compat_gid_t;
25typedef u16 compat_dev_t;
26typedef u16 compat_nlink_t;
27typedef u16 compat_ipc_pid_t;
28typedef __kernel_fsid_t compat_fsid_t;
29
30struct 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
53struct 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 */
69struct 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
77struct 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
96struct 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
110struct 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
121struct 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
138struct 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
159static 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
168static inline bool in_32bit_syscall(void)
169{
170 return in_ia32_syscall() || in_x32_syscall();
171}
172
173#ifdef CONFIG_COMPAT
174static 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
182struct compat_siginfo;
183
184#ifdef CONFIG_X86_X32_ABI
185int 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 */