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;
44typedef u32		compat_uptr_t;
45
46struct compat_timespec {
47	compat_time_t	tv_sec;
48	s32		tv_nsec;
49};
50
51struct compat_timeval {
52	compat_time_t	tv_sec;
53	s32		tv_usec;
54};
55
56struct compat_stat {
57	compat_dev_t	st_dev;
58	u16		__pad1;
59	compat_ino_t	st_ino;
60	compat_mode_t	st_mode;
61	compat_nlink_t	st_nlink;
62	__compat_uid_t	st_uid;
63	__compat_gid_t	st_gid;
64	compat_dev_t	st_rdev;
65	u16		__pad2;
66	u32		st_size;
67	u32		st_blksize;
68	u32		st_blocks;
69	u32		st_atime;
70	u32		st_atime_nsec;
71	u32		st_mtime;
72	u32		st_mtime_nsec;
73	u32		st_ctime;
74	u32		st_ctime_nsec;
75	u32		__unused4;
76	u32		__unused5;
77};
78
79struct compat_flock {
80	short		l_type;
81	short		l_whence;
82	compat_off_t	l_start;
83	compat_off_t	l_len;
84	compat_pid_t	l_pid;
85};
86
87#define F_GETLK64	12	/*  using 'struct flock64' */
88#define F_SETLK64	13
89#define F_SETLKW64	14
90
91/*
92 * IA32 uses 4 byte alignment for 64 bit quantities,
93 * so we need to pack this structure.
94 */
95struct compat_flock64 {
96	short		l_type;
97	short		l_whence;
98	compat_loff_t	l_start;
99	compat_loff_t	l_len;
100	compat_pid_t	l_pid;
101} __attribute__((packed));
102
103struct compat_statfs {
104	int		f_type;
105	int		f_bsize;
106	int		f_blocks;
107	int		f_bfree;
108	int		f_bavail;
109	int		f_files;
110	int		f_ffree;
111	compat_fsid_t	f_fsid;
112	int		f_namelen;	/* SunOS ignores this field. */
113	int		f_frsize;
114	int		f_flags;
115	int		f_spare[4];
116};
117
118#define COMPAT_RLIM_OLD_INFINITY	0x7fffffff
119#define COMPAT_RLIM_INFINITY		0xffffffff
120
121typedef u32		compat_old_sigset_t;	/* at least 32 bits */
122
123#define _COMPAT_NSIG		64
124#define _COMPAT_NSIG_BPW	32
125
126typedef u32               compat_sigset_word;
127
128typedef union compat_sigval {
129	compat_int_t	sival_int;
130	compat_uptr_t	sival_ptr;
131} compat_sigval_t;
132
133typedef struct compat_siginfo {
134	int si_signo;
135	int si_errno;
136	int si_code;
137
138	union {
139		int _pad[128/sizeof(int) - 3];
140
141		/* kill() */
142		struct {
143			unsigned int _pid;	/* sender's pid */
144			unsigned int _uid;	/* sender's uid */
145		} _kill;
146
147		/* POSIX.1b timers */
148		struct {
149			compat_timer_t _tid;	/* timer id */
150			int _overrun;		/* overrun count */
151			compat_sigval_t _sigval;	/* same as below */
152			int _sys_private;	/* not to be passed to user */
153			int _overrun_incr;	/* amount to add to overrun */
154		} _timer;
155
156		/* POSIX.1b signals */
157		struct {
158			unsigned int _pid;	/* sender's pid */
159			unsigned int _uid;	/* sender's uid */
160			compat_sigval_t _sigval;
161		} _rt;
162
163		/* SIGCHLD */
164		struct {
165			unsigned int _pid;	/* which child */
166			unsigned int _uid;	/* sender's uid */
167			int _status;		/* exit code */
168			compat_clock_t _utime;
169			compat_clock_t _stime;
170		} _sigchld;
171
172		/* SIGCHLD (x32 version) */
173		struct {
174			unsigned int _pid;	/* which child */
175			unsigned int _uid;	/* sender's uid */
176			int _status;		/* exit code */
177			compat_s64 _utime;
178			compat_s64 _stime;
179		} _sigchld_x32;
180
181		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
182		struct {
183			unsigned int _addr;	/* faulting insn/memory ref. */
184		} _sigfault;
185
186		/* SIGPOLL */
187		struct {
188			int _band;	/* POLL_IN, POLL_OUT, POLL_MSG */
189			int _fd;
190		} _sigpoll;
191
192		struct {
193			unsigned int _call_addr; /* calling insn */
194			int _syscall;	/* triggering system call number */
195			unsigned int _arch;	/* AUDIT_ARCH_* of syscall */
196		} _sigsys;
197	} _sifields;
198} compat_siginfo_t;
199
200#define COMPAT_OFF_T_MAX	0x7fffffff
201#define COMPAT_LOFF_T_MAX	0x7fffffffffffffffL
202
203struct compat_ipc64_perm {
204	compat_key_t key;
205	__compat_uid32_t uid;
206	__compat_gid32_t gid;
207	__compat_uid32_t cuid;
208	__compat_gid32_t cgid;
209	unsigned short mode;
210	unsigned short __pad1;
211	unsigned short seq;
212	unsigned short __pad2;
213	compat_ulong_t unused1;
214	compat_ulong_t unused2;
215};
216
217struct compat_semid64_ds {
218	struct compat_ipc64_perm sem_perm;
219	compat_time_t  sem_otime;
220	compat_ulong_t __unused1;
221	compat_time_t  sem_ctime;
222	compat_ulong_t __unused2;
223	compat_ulong_t sem_nsems;
224	compat_ulong_t __unused3;
225	compat_ulong_t __unused4;
226};
227
228struct compat_msqid64_ds {
229	struct compat_ipc64_perm msg_perm;
230	compat_time_t  msg_stime;
231	compat_ulong_t __unused1;
232	compat_time_t  msg_rtime;
233	compat_ulong_t __unused2;
234	compat_time_t  msg_ctime;
235	compat_ulong_t __unused3;
236	compat_ulong_t msg_cbytes;
237	compat_ulong_t msg_qnum;
238	compat_ulong_t msg_qbytes;
239	compat_pid_t   msg_lspid;
240	compat_pid_t   msg_lrpid;
241	compat_ulong_t __unused4;
242	compat_ulong_t __unused5;
243};
244
245struct compat_shmid64_ds {
246	struct compat_ipc64_perm shm_perm;
247	compat_size_t  shm_segsz;
248	compat_time_t  shm_atime;
249	compat_ulong_t __unused1;
250	compat_time_t  shm_dtime;
251	compat_ulong_t __unused2;
252	compat_time_t  shm_ctime;
253	compat_ulong_t __unused3;
254	compat_pid_t   shm_cpid;
255	compat_pid_t   shm_lpid;
256	compat_ulong_t shm_nattch;
257	compat_ulong_t __unused4;
258	compat_ulong_t __unused5;
259};
260
261/*
262 * The type of struct elf_prstatus.pr_reg in compatible core dumps.
263 */
264#ifdef CONFIG_X86_X32_ABI
265typedef struct user_regs_struct compat_elf_gregset_t;
266
267#define PR_REG_SIZE(S) (test_thread_flag(TIF_IA32) ? 68 : 216)
268#define PRSTATUS_SIZE(S) (test_thread_flag(TIF_IA32) ? 144 : 296)
269#define SET_PR_FPVALID(S,V) \
270  do { *(int *) (((void *) &((S)->pr_reg)) + PR_REG_SIZE(0)) = (V); } \
271  while (0)
272
273#define COMPAT_USE_64BIT_TIME \
274	(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
275#else
276typedef struct user_regs_struct32 compat_elf_gregset_t;
277#endif
278
279/*
280 * A pointer passed in from user mode. This should not
281 * be used for syscall parameters, just declare them
282 * as pointers because the syscall entry code will have
283 * appropriately converted them already.
284 */
285
286static inline void __user *compat_ptr(compat_uptr_t uptr)
287{
288	return (void __user *)(unsigned long)uptr;
289}
290
291static inline compat_uptr_t ptr_to_compat(void __user *uptr)
292{
293	return (u32)(unsigned long)uptr;
294}
295
296static inline void __user *arch_compat_alloc_user_space(long len)
297{
298	compat_uptr_t sp;
299
300	if (test_thread_flag(TIF_IA32)) {
301		sp = task_pt_regs(current)->sp;
302	} else {
303		/* -128 for the x32 ABI redzone */
304		sp = task_pt_regs(current)->sp - 128;
305	}
306
307	return (void __user *)round_down(sp - len, 16);
308}
309
310static inline bool is_x32_task(void)
311{
312#ifdef CONFIG_X86_X32_ABI
313	if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
314		return true;
315#endif
316	return false;
317}
318
319static inline bool is_compat_task(void)
320{
321	return is_ia32_task() || is_x32_task();
322}
323
324#endif /* _ASM_X86_COMPAT_H */
325