aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-generic/siginfo.h
blob: 9cac8e8dde519460b7b991008fe16a6d74580243 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
#ifndef _ASM_GENERIC_SIGINFO_H
#define _ASM_GENERIC_SIGINFO_H

#include <linux/compiler.h>
#include <linux/types.h>

typedef union sigval {
	int sival_int;
	void __user *sival_ptr;
} sigval_t;

/*
 * This is the size (including padding) of the part of the
 * struct siginfo that is before the union.
 */
#ifndef __ARCH_SI_PREAMBLE_SIZE
#define __ARCH_SI_PREAMBLE_SIZE	(3 * sizeof(int))
#endif

#define SI_MAX_SIZE	128
#ifndef SI_PAD_SIZE
#define SI_PAD_SIZE	((SI_MAX_SIZE - __ARCH_SI_PREAMBLE_SIZE) / sizeof(int))
#endif

#ifndef __ARCH_SI_UID_T
#define __ARCH_SI_UID_T	uid_t
#endif

/*
 * The default "si_band" type is "long", as specified by POSIX.
 * However, some architectures want to override this to "int"
 * for historical compatibility reasons, so we allow that.
 */
#ifndef __ARCH_SI_BAND_T
#define __ARCH_SI_BAND_T long
#endif

#ifndef HAVE_ARCH_SIGINFO_T

typedef struct siginfo {
	int si_signo;
	int si_errno;
	int si_code;

	union {
		int _pad[SI_PAD_SIZE];

		/* kill() */
		struct {
			pid_t _pid;		/* sender's pid */
			__ARCH_SI_UID_T _uid;	/* sender's uid */
		} _kill;

		/* POSIX.1b timers */
		struct {
			timer_t _tid;		/* timer id */
			int _overrun;		/* overrun count */
			char _pad[sizeof( __ARCH_SI_UID_T) - sizeof(int)];
			sigval_t _sigval;	/* same as below */
			int _sys_private;       /* not to be passed to user */
		} _timer;

		/* POSIX.1b signals */
		struct {
			pid_t _pid;		/* sender's pid */
			__ARCH_SI_UID_T _uid;	/* sender's uid */
			sigval_t _sigval;
		} _rt;

		/* SIGCHLD */
		struct {
			pid_t _pid;		/* which child */
			__ARCH_SI_UID_T _uid;	/* sender's uid */
			int _status;		/* exit code */
			clock_t _utime;
			clock_t _stime;
		} _sigchld;

		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
		struct {
			void __user *_addr; /* faulting insn/memory ref. */
#ifdef __ARCH_SI_TRAPNO
			int _trapno;	/* TRAP # which caused the signal */
#endif
		} _sigfault;

		/* SIGPOLL */
		struct {
			__ARCH_SI_BAND_T _band;	/* POLL_IN, POLL_OUT, POLL_MSG */
			int _fd;
		} _sigpoll;
	} _sifields;
} siginfo_t;

#endif

/*
 * How these fields are to be accessed.
 */
#define si_pid		_sifields._kill._pid
#define si_uid		_sifields._kill._uid
#define si_tid		_sifields._timer._tid
#define si_overrun	_sifields._timer._overrun
#define si_sys_private  _sifields._timer._sys_private
#define si_status	_sifields._sigchld._status
#define si_utime	_sifields._sigchld._utime
#define si_stime	_sifields._sigchld._stime
#define si_value	_sifields._rt._sigval
#define si_int		_sifields._rt._sigval.sival_int
#define si_ptr		_sifields._rt._sigval.sival_ptr
#define si_addr		_sifields._sigfault._addr
#ifdef __ARCH_SI_TRAPNO
#define si_trapno	_sifields._sigfault._trapno
#endif
#define si_band		_sifields._sigpoll._band
#define si_fd		_sifields._sigpoll._fd

#ifdef __KERNEL__
#define __SI_MASK	0xffff0000u
#define __SI_KILL	(0 << 16)
#define __SI_TIMER	(1 << 16)
#define __SI_POLL	(2 << 16)
#define __SI_FAULT	(3 << 16)
#define __SI_CHLD	(4 << 16)
#define __SI_RT		(5 << 16)
#define __SI_MESGQ	(6 << 16)
#define __SI_CODE(T,N)	((T) | ((N) & 0xffff))
#else
#define __SI_KILL	0
#define __SI_TIMER	0
#define __SI_POLL	0
#define __SI_FAULT	0
#define __SI_CHLD	0
#define __SI_RT		0
#define __SI_MESGQ	0
#define __SI_CODE(T,N)	(N)
#endif

/*
 * si_code values
 * Digital reserves positive values for kernel-generated signals.
 */
#define SI_USER		0		/* sent by kill, sigsend, raise */
#define SI_KERNEL	0x80		/* sent by the kernel from somewhere */
#define SI_QUEUE	-1		/* sent by sigqueue */
#define SI_TIMER __SI_CODE(__SI_TIMER,-2) /* sent by timer expiration */
#define SI_MESGQ __SI_CODE(__SI_MESGQ,-3) /* sent by real time mesq state change */
#define SI_ASYNCIO	-4		/* sent by AIO completion */
#define SI_SIGIO	-5		/* sent by queued SIGIO */
#define SI_TKILL	-6		/* sent by tkill system call */
#define SI_DETHREAD	-7		/* sent by execve() killing subsidiary threads */

#define SI_FROMUSER(siptr)	((siptr)->si_code <= 0)
#define SI_FROMKERNEL(siptr)	((siptr)->si_code > 0)

/*
 * SIGILL si_codes
 */
#define ILL_ILLOPC	(__SI_FAULT|1)	/* illegal opcode */
#define ILL_ILLOPN	(__SI_FAULT|2)	/* illegal operand */
#define ILL_ILLADR	(__SI_FAULT|3)	/* illegal addressing mode */
#define ILL_ILLTRP	(__SI_FAULT|4)	/* illegal trap */
#define ILL_PRVOPC	(__SI_FAULT|5)	/* privileged opcode */
#define ILL_PRVREG	(__SI_FAULT|6)	/* privileged register */
#define ILL_COPROC	(__SI_FAULT|7)	/* coprocessor error */
#define ILL_BADSTK	(__SI_FAULT|8)	/* internal stack error */
#define NSIGILL		8

/*
 * SIGFPE si_codes
 */
#define FPE_INTDIV	(__SI_FAULT|1)	/* integer divide by zero */
#define FPE_INTOVF	(__SI_FAULT|2)	/* integer overflow */
#define FPE_FLTDIV	(__SI_FAULT|3)	/* floating point divide by zero */
#define FPE_FLTOVF	(__SI_FAULT|4)	/* floating point overflow */
#define FPE_FLTUND	(__SI_FAULT|5)	/* floating point underflow */
#define FPE_FLTRES	(__SI_FAULT|6)	/* floating point inexact result */
#define FPE_FLTINV	(__SI_FAULT|7)	/* floating point invalid operation */
#define FPE_FLTSUB	(__SI_FAULT|8)	/* subscript out of range */
#define NSIGFPE		8

/*
 * SIGSEGV si_codes
 */
#define SEGV_MAPERR	(__SI_FAULT|1)	/* address not mapped to object */
#define SEGV_ACCERR	(__SI_FAULT|2)	/* invalid permissions for mapped object */
#define NSIGSEGV	2

/*
 * SIGBUS si_codes
 */
#define BUS_ADRALN	(__SI_FAULT|1)	/* invalid address alignment */
#define BUS_ADRERR	(__SI_FAULT|2)	/* non-existant physical address */
#define BUS_OBJERR	(__SI_FAULT|3)	/* object specific hardware error */
#define NSIGBUS		3

/*
 * SIGTRAP si_codes
 */
#define TRAP_BRKPT	(__SI_FAULT|1)	/* process breakpoint */
#define TRAP_TRACE	(__SI_FAULT|2)	/* process trace trap */
#define NSIGTRAP	2

/*
 * SIGCHLD si_codes
 */
#define CLD_EXITED	(__SI_CHLD|1)	/* child has exited */
#define CLD_KILLED	(__SI_CHLD|2)	/* child was killed */
#define CLD_DUMPED	(__SI_CHLD|3)	/* child terminated abnormally */
#define CLD_TRAPPED	(__SI_CHLD|4)	/* traced child has trapped */
#define CLD_STOPPED	(__SI_CHLD|5)	/* child has stopped */
#define CLD_CONTINUED	(__SI_CHLD|6)	/* stopped child has continued */
#define NSIGCHLD	6

/*
 * SIGPOLL si_codes
 */
#define POLL_IN		(__SI_POLL|1)	/* data input available */
#define POLL_OUT	(__SI_POLL|2)	/* output buffers available */
#define POLL_MSG	(__SI_POLL|3)	/* input message available */
#define POLL_ERR	(__SI_POLL|4)	/* i/o error */
#define POLL_PRI	(__SI_POLL|5)	/* high priority input available */
#define POLL_HUP	(__SI_POLL|6)	/* device disconnected */
#define NSIGPOLL	6

/*
 * sigevent definitions
 * 
 * It seems likely that SIGEV_THREAD will have to be handled from 
 * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
 * thread manager then catches and does the appropriate nonsense.
 * However, everything is written out here so as to not get lost.
 */
#define SIGEV_SIGNAL	0	/* notify via signal */
#define SIGEV_NONE	1	/* other notification: meaningless */
#define SIGEV_THREAD	2	/* deliver via thread creation */
#define SIGEV_THREAD_ID 4	/* deliver to thread */

#define SIGEV_MAX_SIZE	64
#ifndef SIGEV_PAD_SIZE
#define SIGEV_PAD_SIZE	((SIGEV_MAX_SIZE/sizeof(int)) - 3)
#endif

typedef struct sigevent {
	sigval_t sigev_value;
	int sigev_signo;
	int sigev_notify;
	union {
		int _pad[SIGEV_PAD_SIZE];
		 int _tid;

		struct {
			void (*_function)(sigval_t);
			void *_attribute;	/* really pthread_attr_t */
		} _sigev_thread;
	} _sigev_un;
} sigevent_t;

#define sigev_notify_function	_sigev_un._sigev_thread._function
#define sigev_notify_attributes	_sigev_un._sigev_thread._attribute
#define sigev_notify_thread_id	 _sigev_un._tid

#ifdef __KERNEL__

struct siginfo;
void do_schedule_next_timer(struct siginfo *info);

#ifndef HAVE_ARCH_COPY_SIGINFO

#include <linux/string.h>

static inline void copy_siginfo(struct siginfo *to, struct siginfo *from)
{
	if (from->si_code < 0)
		memcpy(to, from, sizeof(*to));
	else
		/* _sigchld is currently the largest know union member */
		memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld));
}

#endif

extern int copy_siginfo_to_user(struct siginfo __user *to, struct siginfo *from);

#endif /* __KERNEL__ */

#endif