1#ifndef _ASM_X86_COMPAT_H
2#define _ASM_X86_COMPAT_H
3
4/*
5 * Architecture specific compatibility types
6 */
7#include <linux/types.h>
8#include <linux/sched.h>
9#include <asm/processor.h>
10#include <asm/user32.h>
11#include <asm/unistd.h>
12
13#define COMPAT_USER_HZ		100
14#define COMPAT_UTS_MACHINE	"i686\0\0"
15
16typedef u32		compat_size_t;
17typedef s32		compat_ssize_t;
18typedef s32		compat_time_t;
19typedef s32		compat_clock_t;
20typedef s32		compat_pid_t;
21typedef u16		__compat_uid_t;
22typedef u16		__compat_gid_t;
23typedef u32		__compat_uid32_t;
24typedef u32		__compat_gid32_t;
25typedef u16		compat_mode_t;
26typedef u32		compat_ino_t;
27typedef u16		compat_dev_t;
28typedef s32		compat_off_t;
29typedef s64		compat_loff_t;
30typedef u16		compat_nlink_t;
31typedef u16		compat_ipc_pid_t;
32typedef s32		compat_daddr_t;
33typedef u32		compat_caddr_t;
34typedef __kernel_fsid_t	compat_fsid_t;
35typedef s32		compat_timer_t;
36typedef s32		compat_key_t;
37
38typedef s32		compat_int_t;
39typedef s32		compat_long_t;
40typedef s64 __attribute__((aligned(4))) compat_s64;
41typedef u32		compat_uint_t;
42typedef u32		compat_ulong_t;
43typedef u64 __attribute__((aligned(4))) compat_u64;
44
45struct compat_timespec {
46	compat_time_t	tv_sec;
47	s32		tv_nsec;
48};
49
50struct compat_timeval {
51	compat_time_t	tv_sec;
52	s32		tv_usec;
53};
54
55struct compat_stat {
56	compat_dev_t	st_dev;
57	u16		__pad1;
58	compat_ino_t	st_ino;
59	compat_mode_t	st_mode;
60	compat_nlink_t	st_nlink;
61	__compat_uid_t	st_uid;
62	__compat_gid_t	st_gid;
63	compat_dev_t	st_rdev;
64	u16		__pad2;
65	u32		st_size;
66	u32		st_blksize;
67	u32		st_blocks;
68	u32		st_atime;
69	u32		st_atime_nsec;
70	u32		st_mtime;
71	u32		st_mtime_nsec;
72	u32		st_ctime;
73	u32		st_ctime_nsec;
74	u32		__unused4;
75	u32		__unused5;
76};
77
78struct compat_flock {
79	short		l_type;
80	short		l_whence;
81	compat_off_t	l_start;
82	compat_off_t	l_len;
83	compat_pid_t	l_pid;
84};
85
86#define F_GETLK64	12	/*  using 'struct flock64' */
87#define F_SETLK64	13
88#define F_SETLKW64	14
89
90/*
91 * IA32 uses 4 byte alignment for 64 bit quantities,
92 * so we need to pack this structure.
93 */
94struct compat_flock64 {
95	short		l_type;
96	short		l_whence;
97	compat_loff_t	l_start;
98	compat_loff_t	l_len;
99	compat_pid_t	l_pid;
100} __attribute__((packed));
101
102struct compat_statfs {
103	int		f_type;
104	int		f_bsize;
105	int		f_blocks;
106	int		f_bfree;
107	int		f_bavail;
108	int		f_files;
109	int		f_ffree;
110	compat_fsid_t	f_fsid;
111	int		f_namelen;	/* SunOS ignores this field. */
112	int		f_frsize;
113	int		f_flags;
114	int		f_spare[4];
115};
116
117#define COMPAT_RLIM_OLD_INFINITY	0x7fffffff
118#define COMPAT_RLIM_INFINITY		0xffffffff
119
120typedef u32		compat_old_sigset_t;	/* at least 32 bits */
121
122#define _COMPAT_NSIG		64
123#define _COMPAT_NSIG_BPW	32
124
125typedef u32               compat_sigset_word;
126
127#define COMPAT_OFF_T_MAX	0x7fffffff
128#define COMPAT_LOFF_T_MAX	0x7fffffffffffffffL
129
130struct compat_ipc64_perm {
131	compat_key_t key;
132	__compat_uid32_t uid;
133	__compat_gid32_t gid;
134	__compat_uid32_t cuid;
135	__compat_gid32_t cgid;
136	unsigned short mode;
137	unsigned short __pad1;
138	unsigned short seq;
139	unsigned short __pad2;
140	compat_ulong_t unused1;
141	compat_ulong_t unused2;
142};
143
144struct compat_semid64_ds {
145	struct compat_ipc64_perm sem_perm;
146	compat_time_t  sem_otime;
147	compat_ulong_t __unused1;
148	compat_time_t  sem_ctime;
149	compat_ulong_t __unused2;
150	compat_ulong_t sem_nsems;
151	compat_ulong_t __unused3;
152	compat_ulong_t __unused4;
153};
154
155struct compat_msqid64_ds {
156	struct compat_ipc64_perm msg_perm;
157	compat_time_t  msg_stime;
158	compat_ulong_t __unused1;
159	compat_time_t  msg_rtime;
160	compat_ulong_t __unused2;
161	compat_time_t  msg_ctime;
162	compat_ulong_t __unused3;
163	compat_ulong_t msg_cbytes;
164	compat_ulong_t msg_qnum;
165	compat_ulong_t msg_qbytes;
166	compat_pid_t   msg_lspid;
167	compat_pid_t   msg_lrpid;
168	compat_ulong_t __unused4;
169	compat_ulong_t __unused5;
170};
171
172struct compat_shmid64_ds {
173	struct compat_ipc64_perm shm_perm;
174	compat_size_t  shm_segsz;
175	compat_time_t  shm_atime;
176	compat_ulong_t __unused1;
177	compat_time_t  shm_dtime;
178	compat_ulong_t __unused2;
179	compat_time_t  shm_ctime;
180	compat_ulong_t __unused3;
181	compat_pid_t   shm_cpid;
182	compat_pid_t   shm_lpid;
183	compat_ulong_t shm_nattch;
184	compat_ulong_t __unused4;
185	compat_ulong_t __unused5;
186};
187
188/*
189 * The type of struct elf_prstatus.pr_reg in compatible core dumps.
190 */
191#ifdef CONFIG_X86_X32_ABI
192typedef struct user_regs_struct compat_elf_gregset_t;
193
194#define PR_REG_SIZE(S) (test_thread_flag(TIF_IA32) ? 68 : 216)
195#define PRSTATUS_SIZE(S) (test_thread_flag(TIF_IA32) ? 144 : 296)
196#define SET_PR_FPVALID(S,V) \
197  do { *(int *) (((void *) &((S)->pr_reg)) + PR_REG_SIZE(0)) = (V); } \
198  while (0)
199
200#define COMPAT_USE_64BIT_TIME \
201	(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
202#else
203typedef struct user_regs_struct32 compat_elf_gregset_t;
204#endif
205
206/*
207 * A pointer passed in from user mode. This should not
208 * be used for syscall parameters, just declare them
209 * as pointers because the syscall entry code will have
210 * appropriately converted them already.
211 */
212typedef	u32		compat_uptr_t;
213
214static inline void __user *compat_ptr(compat_uptr_t uptr)
215{
216	return (void __user *)(unsigned long)uptr;
217}
218
219static inline compat_uptr_t ptr_to_compat(void __user *uptr)
220{
221	return (u32)(unsigned long)uptr;
222}
223
224static inline void __user *arch_compat_alloc_user_space(long len)
225{
226	compat_uptr_t sp;
227
228	if (test_thread_flag(TIF_IA32)) {
229		sp = task_pt_regs(current)->sp;
230	} else {
231		/* -128 for the x32 ABI redzone */
232		sp = percpu_read(old_rsp) - 128;
233	}
234
235	return (void __user *)round_down(sp - len, 16);
236}
237
238static inline bool is_x32_task(void)
239{
240#ifdef CONFIG_X86_X32_ABI
241	if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
242		return true;
243#endif
244	return false;
245}
246
247static inline bool is_compat_task(void)
248{
249	return is_ia32_task() || is_x32_task();
250}
251
252#endif /* _ASM_X86_COMPAT_H */
253