siginfo.h source code [include/x86_64-linux-gnu/bits/siginfo.h]

1	/* siginfo_t, sigevent and constants. Linux x86-64 version.
2	Copyright (C) 2012-2016 Free Software Foundation, Inc.
3	This file is part of the GNU C Library.
4
5	The GNU C Library is free software; you can redistribute it and/or
6	modify it under the terms of the GNU Lesser General Public
7	License as published by the Free Software Foundation; either
8	version 2.1 of the License, or (at your option) any later version.
9
10	The GNU C Library is distributed in the hope that it will be useful,
11	but WITHOUT ANY WARRANTY; without even the implied warranty of
12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13	Lesser General Public License for more details.
14
15	You should have received a copy of the GNU Lesser General Public
16	License along with the GNU C Library; if not, see
17	<http://www.gnu.org/licenses/>. */
18
19	#if !defined _SIGNAL_H && !defined __need_siginfo_t \
20	&& !defined __need_sigevent_t
21	# error "Never include this file directly. Use <signal.h> instead"
22	#endif
23
24	#include <bits/wordsize.h>
25
26	#if (!defined __have_sigval_t \
27	&& (defined _SIGNAL_H \|\| defined __need_siginfo_t \
28	\|\| defined __need_sigevent_t))
29	# define __have_sigval_t 1
30
31	/* Type for data associated with a signal. */
32	typedef union sigval
33	{
34	int sival_int;
35	void *sival_ptr;
36	} sigval_t;
37	#endif
38
39	#if (!defined __have_siginfo_t \
40	&& (defined _SIGNAL_H \|\| defined __need_siginfo_t))
41	# define __have_siginfo_t 1
42
43	# define __SI_MAX_SIZE 128
44	# if __WORDSIZE == 64
45	# define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof (int)) - 4)
46	# else
47	# define __SI_PAD_SIZE ((__SI_MAX_SIZE / sizeof (int)) - 3)
48	# endif
49
50	# if defined __x86_64__ && __WORDSIZE == 32
51	/* si_utime and si_stime must be 4 byte aligned for x32 to match the
52	kernel. We align siginfo_t to 8 bytes so that si_utime and si_stime
53	are actually aligned to 8 bytes since their offsets are multiple of
54	8 bytes. */
55	typedef __clock_t __attribute__ ((__aligned__ (4))) __sigchld_clock_t;
56	# define __SI_ALIGNMENT __attribute__ ((__aligned__ (8)))
57	# else
58	typedef __clock_t __sigchld_clock_t;
59	# define __SI_ALIGNMENT
60	# endif
61
62	typedef struct
63	{
64	int si_signo; /* Signal number. */
65	int si_errno; /* If non-zero, an errno value associated with
66	this signal, as defined in <errno.h>. */
67	int si_code; /* Signal code. */
68
69	union
70	{
71	int _pad[__SI_PAD_SIZE];
72
73	/* kill(). */
74	struct
75	{
76	__pid_t si_pid; /* Sending process ID. */
77	__uid_t si_uid; /* Real user ID of sending process. */
78	} _kill;
79
80	/* POSIX.1b timers. */
81	struct
82	{
83	int si_tid; /* Timer ID. */
84	int si_overrun; /* Overrun count. */
85	sigval_t si_sigval; /* Signal value. */
86	} _timer;
87
88	/* POSIX.1b signals. */
89	struct
90	{
91	__pid_t si_pid; /* Sending process ID. */
92	__uid_t si_uid; /* Real user ID of sending process. */
93	sigval_t si_sigval; /* Signal value. */
94	} _rt;
95
96	/* SIGCHLD. */
97	struct
98	{
99	__pid_t si_pid; /* Which child. */
100	__uid_t si_uid; /* Real user ID of sending process. */
101	int si_status; /* Exit value or signal. */
102	__sigchld_clock_t si_utime;
103	__sigchld_clock_t si_stime;
104	} _sigchld;
105
106	/* SIGILL, SIGFPE, SIGSEGV, SIGBUS. */
107	struct
108	{
109	void si_addr; / Faulting insn/memory ref. */
110	short int si_addr_lsb; /* Valid LSB of the reported address. */
111	struct
112	{
113	void *_lower;
114	void *_upper;
115	} si_addr_bnd;
116	} _sigfault;
117
118	/* SIGPOLL. */
119	struct
120	{
121	long int si_band; /* Band event for SIGPOLL. */
122	int si_fd;
123	} _sigpoll;
124
125	/* SIGSYS. */
126	struct
127	{
128	void _call_addr; / Calling user insn. */
129	int _syscall; /* Triggering system call number. */
130	unsigned int _arch; /* AUDIT_ARCH_* of syscall. */
131	} _sigsys;
132	} _sifields;
133	} siginfo_t __SI_ALIGNMENT;
134
135
136	/* X/Open requires some more fields with fixed names. */
137	# define si_pid _sifields._kill.si_pid
138	# define si_uid _sifields._kill.si_uid
139	# define si_timerid _sifields._timer.si_tid
140	# define si_overrun _sifields._timer.si_overrun
141	# define si_status _sifields._sigchld.si_status
142	# define si_utime _sifields._sigchld.si_utime
143	# define si_stime _sifields._sigchld.si_stime
144	# define si_value _sifields._rt.si_sigval
145	# define si_int _sifields._rt.si_sigval.sival_int
146	# define si_ptr _sifields._rt.si_sigval.sival_ptr
147	# define si_addr _sifields._sigfault.si_addr
148	# define si_addr_lsb _sifields._sigfault.si_addr_lsb
149	# define si_lower _sifields._sigfault.si_addr_bnd._lower
150	# define si_upper _sifields._sigfault.si_addr_bnd._upper
151	# define si_band _sifields._sigpoll.si_band
152	# define si_fd _sifields._sigpoll.si_fd
153	# define si_call_addr _sifields._sigsys._call_addr
154	# define si_syscall _sifields._sigsys._syscall
155	# define si_arch _sifields._sigsys._arch
156
157
158	/* Values for `si_code'. Positive values are reserved for kernel-generated
159	signals. */
160	enum
161	{
162	SI_ASYNCNL = -60, /* Sent by asynch name lookup completion. */
163	# define SI_ASYNCNL SI_ASYNCNL
164	SI_TKILL = -6, /* Sent by tkill. */
165	# define SI_TKILL SI_TKILL
166	SI_SIGIO, /* Sent by queued SIGIO. */
167	# define SI_SIGIO SI_SIGIO
168	SI_ASYNCIO, /* Sent by AIO completion. */
169	# define SI_ASYNCIO SI_ASYNCIO
170	SI_MESGQ, /* Sent by real time mesq state change. */
171	# define SI_MESGQ SI_MESGQ
172	SI_TIMER, /* Sent by timer expiration. */
173	# define SI_TIMER SI_TIMER
174	SI_QUEUE, /* Sent by sigqueue. */
175	# define SI_QUEUE SI_QUEUE
176	SI_USER, /* Sent by kill, sigsend. */
177	# define SI_USER SI_USER
178	SI_KERNEL = 0x80 /* Send by kernel. */
179	#define SI_KERNEL SI_KERNEL
180	};
181
182
183	# if defined __USE_XOPEN_EXTENDED \|\| defined __USE_XOPEN2K8
184	/* `si_code' values for SIGILL signal. */
185	enum
186	{
187	ILL_ILLOPC = 1, /* Illegal opcode. */
188	# define ILL_ILLOPC ILL_ILLOPC
189	ILL_ILLOPN, /* Illegal operand. */
190	# define ILL_ILLOPN ILL_ILLOPN
191	ILL_ILLADR, /* Illegal addressing mode. */
192	# define ILL_ILLADR ILL_ILLADR
193	ILL_ILLTRP, /* Illegal trap. */
194	# define ILL_ILLTRP ILL_ILLTRP
195	ILL_PRVOPC, /* Privileged opcode. */
196	# define ILL_PRVOPC ILL_PRVOPC
197	ILL_PRVREG, /* Privileged register. */
198	# define ILL_PRVREG ILL_PRVREG
199	ILL_COPROC, /* Coprocessor error. */
200	# define ILL_COPROC ILL_COPROC
201	ILL_BADSTK /* Internal stack error. */
202	# define ILL_BADSTK ILL_BADSTK
203	};
204
205	/* `si_code' values for SIGFPE signal. */
206	enum
207	{
208	FPE_INTDIV = 1, /* Integer divide by zero. */
209	# define FPE_INTDIV FPE_INTDIV
210	FPE_INTOVF, /* Integer overflow. */
211	# define FPE_INTOVF FPE_INTOVF
212	FPE_FLTDIV, /* Floating point divide by zero. */
213	# define FPE_FLTDIV FPE_FLTDIV
214	FPE_FLTOVF, /* Floating point overflow. */
215	# define FPE_FLTOVF FPE_FLTOVF
216	FPE_FLTUND, /* Floating point underflow. */
217	# define FPE_FLTUND FPE_FLTUND
218	FPE_FLTRES, /* Floating point inexact result. */
219	# define FPE_FLTRES FPE_FLTRES
220	FPE_FLTINV, /* Floating point invalid operation. */
221	# define FPE_FLTINV FPE_FLTINV
222	FPE_FLTSUB /* Subscript out of range. */
223	# define FPE_FLTSUB FPE_FLTSUB
224	};
225
226	/* `si_code' values for SIGSEGV signal. */
227	enum
228	{
229	SEGV_MAPERR = 1, /* Address not mapped to object. */
230	# define SEGV_MAPERR SEGV_MAPERR
231	SEGV_ACCERR /* Invalid permissions for mapped object. */
232	# define SEGV_ACCERR SEGV_ACCERR
233	};
234
235	/* `si_code' values for SIGBUS signal. */
236	enum
237	{
238	BUS_ADRALN = 1, /* Invalid address alignment. */
239	# define BUS_ADRALN BUS_ADRALN
240	BUS_ADRERR, /* Non-existant physical address. */
241	# define BUS_ADRERR BUS_ADRERR
242	BUS_OBJERR, /* Object specific hardware error. */
243	# define BUS_OBJERR BUS_OBJERR
244	BUS_MCEERR_AR, /* Hardware memory error: action required. */
245	# define BUS_MCEERR_AR BUS_MCEERR_AR
246	BUS_MCEERR_AO /* Hardware memory error: action optional. */
247	# define BUS_MCEERR_AO BUS_MCEERR_AO
248	};
249	# endif
250
251	# ifdef __USE_XOPEN_EXTENDED
252	/* `si_code' values for SIGTRAP signal. */
253	enum
254	{
255	TRAP_BRKPT = 1, /* Process breakpoint. */
256	# define TRAP_BRKPT TRAP_BRKPT
257	TRAP_TRACE /* Process trace trap. */
258	# define TRAP_TRACE TRAP_TRACE
259	};
260	# endif
261
262	# if defined __USE_XOPEN_EXTENDED \|\| defined __USE_XOPEN2K8
263	/* `si_code' values for SIGCHLD signal. */
264	enum
265	{
266	CLD_EXITED = 1, /* Child has exited. */
267	# define CLD_EXITED CLD_EXITED
268	CLD_KILLED, /* Child was killed. */
269	# define CLD_KILLED CLD_KILLED
270	CLD_DUMPED, /* Child terminated abnormally. */
271	# define CLD_DUMPED CLD_DUMPED
272	CLD_TRAPPED, /* Traced child has trapped. */
273	# define CLD_TRAPPED CLD_TRAPPED
274	CLD_STOPPED, /* Child has stopped. */
275	# define CLD_STOPPED CLD_STOPPED
276	CLD_CONTINUED /* Stopped child has continued. */
277	# define CLD_CONTINUED CLD_CONTINUED
278	};
279
280	/* `si_code' values for SIGPOLL signal. */
281	enum
282	{
283	POLL_IN = 1, /* Data input available. */
284	# define POLL_IN POLL_IN
285	POLL_OUT, /* Output buffers available. */
286	# define POLL_OUT POLL_OUT
287	POLL_MSG, /* Input message available. */
288	# define POLL_MSG POLL_MSG
289	POLL_ERR, /* I/O error. */
290	# define POLL_ERR POLL_ERR
291	POLL_PRI, /* High priority input available. */
292	# define POLL_PRI POLL_PRI
293	POLL_HUP /* Device disconnected. */
294	# define POLL_HUP POLL_HUP
295	};
296	# endif
297
298	# undef __need_siginfo_t
299	#endif /* !have siginfo_t && (have _SIGNAL_H \|\| need siginfo_t). */
300
301
302	#if (defined _SIGNAL_H \|\| defined __need_sigevent_t) \
303	&& !defined __have_sigevent_t
304	# define __have_sigevent_t 1
305
306	/* Structure to transport application-defined values with signals. */
307	# define __SIGEV_MAX_SIZE 64
308	# if __WORDSIZE == 64
309	# define __SIGEV_PAD_SIZE ((__SIGEV_MAX_SIZE / sizeof (int)) - 4)
310	# else
311	# define __SIGEV_PAD_SIZE ((__SIGEV_MAX_SIZE / sizeof (int)) - 3)
312	# endif
313
314	/* Forward declaration. */
315	# ifndef __have_pthread_attr_t
316	typedef union pthread_attr_t pthread_attr_t;
317	# define __have_pthread_attr_t 1
318	# endif
319
320	typedef struct sigevent
321	{
322	sigval_t sigev_value;
323	int sigev_signo;
324	int sigev_notify;
325
326	union
327	{
328	int _pad[__SIGEV_PAD_SIZE];
329
330	/* When SIGEV_SIGNAL and SIGEV_THREAD_ID set, LWP ID of the
331	thread to receive the signal. */
332	__pid_t _tid;
333
334	struct
335	{
336	void (_function) (sigval_t); / Function to start. */
337	pthread_attr_t _attribute; / Thread attributes. */
338	} _sigev_thread;
339	} _sigev_un;
340	} sigevent_t;
341
342	/* POSIX names to access some of the members. */
343	# define sigev_notify_function _sigev_un._sigev_thread._function
344	# define sigev_notify_attributes _sigev_un._sigev_thread._attribute
345
346	/* `sigev_notify' values. */
347	enum
348	{
349	SIGEV_SIGNAL = 0, /* Notify via signal. */
350	# define SIGEV_SIGNAL SIGEV_SIGNAL
351	SIGEV_NONE, /* Other notification: meaningless. */
352	# define SIGEV_NONE SIGEV_NONE
353	SIGEV_THREAD, /* Deliver via thread creation. */
354	# define SIGEV_THREAD SIGEV_THREAD
355
356	SIGEV_THREAD_ID = 4 /* Send signal to specific thread. */
357	#define SIGEV_THREAD_ID SIGEV_THREAD_ID
358	};
359
360	#endif /* have _SIGNAL_H. */
361