1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_COMPAT_H
3#define _ASM_COMPAT_H
4/*
5 * Architecture specific compatibility types
6 */
7#include <linux/thread_info.h>
8#include <linux/types.h>
9#include <asm/page.h>
10#include <asm/ptrace.h>
11
12#include <asm-generic/compat.h>
13
14#define COMPAT_USER_HZ		100
15#define COMPAT_UTS_MACHINE	"mips\0\0\0"
16
17typedef s32		__compat_uid_t;
18typedef s32		__compat_gid_t;
19typedef __compat_uid_t	__compat_uid32_t;
20typedef __compat_gid_t	__compat_gid32_t;
21typedef u32		compat_mode_t;
22typedef u32		compat_dev_t;
23typedef u32		compat_nlink_t;
24typedef s32		compat_ipc_pid_t;
25typedef s32		compat_caddr_t;
26typedef struct {
27	s32	val[2];
28} compat_fsid_t;
29
30struct compat_stat {
31	compat_dev_t	st_dev;
32	s32		st_pad1[3];
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	s32		st_pad2[2];
40	compat_off_t	st_size;
41	s32		st_pad3;
42	old_time32_t	st_atime;
43	s32		st_atime_nsec;
44	old_time32_t	st_mtime;
45	s32		st_mtime_nsec;
46	old_time32_t	st_ctime;
47	s32		st_ctime_nsec;
48	s32		st_blksize;
49	s32		st_blocks;
50	s32		st_pad4[14];
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	s32		l_sysid;
59	compat_pid_t	l_pid;
60	s32		pad[4];
61};
62
63#define F_GETLK64	33
64#define F_SETLK64	34
65#define F_SETLKW64	35
66
67struct compat_flock64 {
68	short		l_type;
69	short		l_whence;
70	compat_loff_t	l_start;
71	compat_loff_t	l_len;
72	compat_pid_t	l_pid;
73};
74
75struct compat_statfs {
76	int		f_type;
77	int		f_bsize;
78	int		f_frsize;
79	int		f_blocks;
80	int		f_bfree;
81	int		f_files;
82	int		f_ffree;
83	int		f_bavail;
84	compat_fsid_t	f_fsid;
85	int		f_namelen;
86	int		f_flags;
87	int		f_spare[5];
88};
89
90#define COMPAT_RLIM_INFINITY	0x7fffffffUL
91
92typedef u32		compat_old_sigset_t;	/* at least 32 bits */
93
94#define _COMPAT_NSIG		128		/* Don't ask !$@#% ...	*/
95#define _COMPAT_NSIG_BPW	32
96
97typedef u32		compat_sigset_word;
98
99#define COMPAT_OFF_T_MAX	0x7fffffff
100
101static inline void __user *arch_compat_alloc_user_space(long len)
102{
103	struct pt_regs *regs = (struct pt_regs *)
104		((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1;
105
106	return (void __user *) (regs->regs[29] - len);
107}
108
109struct compat_ipc64_perm {
110	compat_key_t key;
111	__compat_uid32_t uid;
112	__compat_gid32_t gid;
113	__compat_uid32_t cuid;
114	__compat_gid32_t cgid;
115	compat_mode_t mode;
116	unsigned short seq;
117	unsigned short __pad2;
118	compat_ulong_t __unused1;
119	compat_ulong_t __unused2;
120};
121
122struct compat_semid64_ds {
123	struct compat_ipc64_perm sem_perm;
124	compat_ulong_t	sem_otime;
125	compat_ulong_t	sem_ctime;
126	compat_ulong_t	sem_nsems;
127	compat_ulong_t	sem_otime_high;
128	compat_ulong_t	sem_ctime_high;
129};
130
131struct compat_msqid64_ds {
132	struct compat_ipc64_perm msg_perm;
133#ifndef CONFIG_CPU_LITTLE_ENDIAN
134	compat_ulong_t	msg_stime_high;
135#endif
136	compat_ulong_t	msg_stime;
137#ifdef CONFIG_CPU_LITTLE_ENDIAN
138	compat_ulong_t	msg_stime_high;
139#endif
140#ifndef CONFIG_CPU_LITTLE_ENDIAN
141	compat_ulong_t	msg_rtime_high;
142#endif
143	compat_ulong_t	msg_rtime;
144#ifdef CONFIG_CPU_LITTLE_ENDIAN
145	compat_ulong_t	msg_rtime_high;
146#endif
147#ifndef CONFIG_CPU_LITTLE_ENDIAN
148	compat_ulong_t	msg_ctime_high;
149#endif
150	compat_ulong_t	msg_ctime;
151#ifdef CONFIG_CPU_LITTLE_ENDIAN
152	compat_ulong_t	msg_ctime_high;
153#endif
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
163struct compat_shmid64_ds {
164	struct compat_ipc64_perm shm_perm;
165	compat_size_t	shm_segsz;
166	compat_ulong_t	shm_atime;
167	compat_ulong_t	shm_dtime;
168	compat_ulong_t	shm_ctime;
169	compat_pid_t	shm_cpid;
170	compat_pid_t	shm_lpid;
171	compat_ulong_t	shm_nattch;
172	compat_ushort_t	shm_atime_high;
173	compat_ushort_t	shm_dtime_high;
174	compat_ushort_t	shm_ctime_high;
175	compat_ushort_t	__unused2;
176};
177
178/* MIPS has unusual order of fields in stack_t */
179typedef struct compat_sigaltstack {
180	compat_uptr_t			ss_sp;
181	compat_size_t			ss_size;
182	int				ss_flags;
183} compat_stack_t;
184#define compat_sigaltstack compat_sigaltstack
185
186static inline int is_compat_task(void)
187{
188	return test_thread_flag(TIF_32BIT_ADDR);
189}
190
191#endif /* _ASM_COMPAT_H */
192