1/* siginfo_t, sigevent and constants. Linux x86-64 version.
2 Copyright (C) 2012-2014 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. */
32typedef 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. */
55typedef __clock_t __attribute__ ((__aligned__ (4))) __sigchld_clock_t;
56# define __SI_ALIGNMENT __attribute__ ((__aligned__ (8)))
57# else
58typedef __clock_t __sigchld_clock_t;
59# define __SI_ALIGNMENT
60# endif
61
62typedef 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 } _sigfault;
112
113 /* SIGPOLL. */
114 struct
115 {
116 long int si_band; /* Band event for SIGPOLL. */
117 int si_fd;
118 } _sigpoll;
119
120 /* SIGSYS. */
121 struct
122 {
123 void *_call_addr; /* Calling user insn. */
124 int _syscall; /* Triggering system call number. */
125 unsigned int _arch; /* AUDIT_ARCH_* of syscall. */
126 } _sigsys;
127 } _sifields;
128 } siginfo_t __SI_ALIGNMENT;
129
130
131/* X/Open requires some more fields with fixed names. */
132# define si_pid _sifields._kill.si_pid
133# define si_uid _sifields._kill.si_uid
134# define si_timerid _sifields._timer.si_tid
135# define si_overrun _sifields._timer.si_overrun
136# define si_status _sifields._sigchld.si_status
137# define si_utime _sifields._sigchld.si_utime
138# define si_stime _sifields._sigchld.si_stime
139# define si_value _sifields._rt.si_sigval
140# define si_int _sifields._rt.si_sigval.sival_int
141# define si_ptr _sifields._rt.si_sigval.sival_ptr
142# define si_addr _sifields._sigfault.si_addr
143# define si_addr_lsb _sifields._sigfault.si_addr_lsb
144# define si_band _sifields._sigpoll.si_band
145# define si_fd _sifields._sigpoll.si_fd
146# define si_call_addr _sifields._sigsys._call_addr
147# define si_syscall _sifields._sigsys._syscall
148# define si_arch _sifields._sigsys._arch
149
150
151/* Values for `si_code'. Positive values are reserved for kernel-generated
152 signals. */
153enum
154{
155 SI_ASYNCNL = -60, /* Sent by asynch name lookup completion. */
156# define SI_ASYNCNL SI_ASYNCNL
157 SI_TKILL = -6, /* Sent by tkill. */
158# define SI_TKILL SI_TKILL
159 SI_SIGIO, /* Sent by queued SIGIO. */
160# define SI_SIGIO SI_SIGIO
161 SI_ASYNCIO, /* Sent by AIO completion. */
162# define SI_ASYNCIO SI_ASYNCIO
163 SI_MESGQ, /* Sent by real time mesq state change. */
164# define SI_MESGQ SI_MESGQ
165 SI_TIMER, /* Sent by timer expiration. */
166# define SI_TIMER SI_TIMER
167 SI_QUEUE, /* Sent by sigqueue. */
168# define SI_QUEUE SI_QUEUE
169 SI_USER, /* Sent by kill, sigsend. */
170# define SI_USER SI_USER
171 SI_KERNEL = 0x80 /* Send by kernel. */
172#define SI_KERNEL SI_KERNEL
173};
174
175
176/* `si_code' values for SIGILL signal. */
177enum
178{
179 ILL_ILLOPC = 1, /* Illegal opcode. */
180# define ILL_ILLOPC ILL_ILLOPC
181 ILL_ILLOPN, /* Illegal operand. */
182# define ILL_ILLOPN ILL_ILLOPN
183 ILL_ILLADR, /* Illegal addressing mode. */
184# define ILL_ILLADR ILL_ILLADR
185 ILL_ILLTRP, /* Illegal trap. */
186# define ILL_ILLTRP ILL_ILLTRP
187 ILL_PRVOPC, /* Privileged opcode. */
188# define ILL_PRVOPC ILL_PRVOPC
189 ILL_PRVREG, /* Privileged register. */
190# define ILL_PRVREG ILL_PRVREG
191 ILL_COPROC, /* Coprocessor error. */
192# define ILL_COPROC ILL_COPROC
193 ILL_BADSTK /* Internal stack error. */
194# define ILL_BADSTK ILL_BADSTK
195};
196
197/* `si_code' values for SIGFPE signal. */
198enum
199{
200 FPE_INTDIV = 1, /* Integer divide by zero. */
201# define FPE_INTDIV FPE_INTDIV
202 FPE_INTOVF, /* Integer overflow. */
203# define FPE_INTOVF FPE_INTOVF
204 FPE_FLTDIV, /* Floating point divide by zero. */
205# define FPE_FLTDIV FPE_FLTDIV
206 FPE_FLTOVF, /* Floating point overflow. */
207# define FPE_FLTOVF FPE_FLTOVF
208 FPE_FLTUND, /* Floating point underflow. */
209# define FPE_FLTUND FPE_FLTUND
210 FPE_FLTRES, /* Floating point inexact result. */
211# define FPE_FLTRES FPE_FLTRES
212 FPE_FLTINV, /* Floating point invalid operation. */
213# define FPE_FLTINV FPE_FLTINV
214 FPE_FLTSUB /* Subscript out of range. */
215# define FPE_FLTSUB FPE_FLTSUB
216};
217
218/* `si_code' values for SIGSEGV signal. */
219enum
220{
221 SEGV_MAPERR = 1, /* Address not mapped to object. */
222# define SEGV_MAPERR SEGV_MAPERR
223 SEGV_ACCERR /* Invalid permissions for mapped object. */
224# define SEGV_ACCERR SEGV_ACCERR
225};
226
227/* `si_code' values for SIGBUS signal. */
228enum
229{
230 BUS_ADRALN = 1, /* Invalid address alignment. */
231# define BUS_ADRALN BUS_ADRALN
232 BUS_ADRERR, /* Non-existant physical address. */
233# define BUS_ADRERR BUS_ADRERR
234 BUS_OBJERR, /* Object specific hardware error. */
235# define BUS_OBJERR BUS_OBJERR
236 BUS_MCEERR_AR, /* Hardware memory error: action required. */
237# define BUS_MCEERR_AR BUS_MCEERR_AR
238 BUS_MCEERR_AO /* Hardware memory error: action optional. */
239# define BUS_MCEERR_AO BUS_MCEERR_AO
240};
241
242/* `si_code' values for SIGTRAP signal. */
243enum
244{
245 TRAP_BRKPT = 1, /* Process breakpoint. */
246# define TRAP_BRKPT TRAP_BRKPT
247 TRAP_TRACE /* Process trace trap. */
248# define TRAP_TRACE TRAP_TRACE
249};
250
251/* `si_code' values for SIGCHLD signal. */
252enum
253{
254 CLD_EXITED = 1, /* Child has exited. */
255# define CLD_EXITED CLD_EXITED
256 CLD_KILLED, /* Child was killed. */
257# define CLD_KILLED CLD_KILLED
258 CLD_DUMPED, /* Child terminated abnormally. */
259# define CLD_DUMPED CLD_DUMPED
260 CLD_TRAPPED, /* Traced child has trapped. */
261# define CLD_TRAPPED CLD_TRAPPED
262 CLD_STOPPED, /* Child has stopped. */
263# define CLD_STOPPED CLD_STOPPED
264 CLD_CONTINUED /* Stopped child has continued. */
265# define CLD_CONTINUED CLD_CONTINUED
266};
267
268/* `si_code' values for SIGPOLL signal. */
269enum
270{
271 POLL_IN = 1, /* Data input available. */
272# define POLL_IN POLL_IN
273 POLL_OUT, /* Output buffers available. */
274# define POLL_OUT POLL_OUT
275 POLL_MSG, /* Input message available. */
276# define POLL_MSG POLL_MSG
277 POLL_ERR, /* I/O error. */
278# define POLL_ERR POLL_ERR
279 POLL_PRI, /* High priority input available. */
280# define POLL_PRI POLL_PRI
281 POLL_HUP /* Device disconnected. */
282# define POLL_HUP POLL_HUP
283};
284
285# undef __need_siginfo_t
286#endif /* !have siginfo_t && (have _SIGNAL_H || need siginfo_t). */
287
288
289#if (defined _SIGNAL_H || defined __need_sigevent_t) \
290 && !defined __have_sigevent_t
291# define __have_sigevent_t 1
292
293/* Structure to transport application-defined values with signals. */
294# define __SIGEV_MAX_SIZE 64
295# if __WORDSIZE == 64
296# define __SIGEV_PAD_SIZE ((__SIGEV_MAX_SIZE / sizeof (int)) - 4)
297# else
298# define __SIGEV_PAD_SIZE ((__SIGEV_MAX_SIZE / sizeof (int)) - 3)
299# endif
300
301/* Forward declaration. */
302# ifndef __have_pthread_attr_t
303typedef union pthread_attr_t pthread_attr_t;
304# define __have_pthread_attr_t 1
305# endif
306
307typedef struct sigevent
308 {
309 sigval_t sigev_value;
310 int sigev_signo;
311 int sigev_notify;
312
313 union
314 {
315 int _pad[__SIGEV_PAD_SIZE];
316
317 /* When SIGEV_SIGNAL and SIGEV_THREAD_ID set, LWP ID of the
318 thread to receive the signal. */
319 __pid_t _tid;
320
321 struct
322 {
323 void (*_function) (sigval_t); /* Function to start. */
324 pthread_attr_t *_attribute; /* Thread attributes. */
325 } _sigev_thread;
326 } _sigev_un;
327 } sigevent_t;
328
329/* POSIX names to access some of the members. */
330# define sigev_notify_function _sigev_un._sigev_thread._function
331# define sigev_notify_attributes _sigev_un._sigev_thread._attribute
332
333/* `sigev_notify' values. */
334enum
335{
336 SIGEV_SIGNAL = 0, /* Notify via signal. */
337# define SIGEV_SIGNAL SIGEV_SIGNAL
338 SIGEV_NONE, /* Other notification: meaningless. */
339# define SIGEV_NONE SIGEV_NONE
340 SIGEV_THREAD, /* Deliver via thread creation. */
341# define SIGEV_THREAD SIGEV_THREAD
342
343 SIGEV_THREAD_ID = 4 /* Send signal to specific thread. */
344#define SIGEV_THREAD_ID SIGEV_THREAD_ID
345};
346
347#endif /* have _SIGNAL_H. */
348