1 #ifndef _ASM_GENERIC_SIGINFO_H
2 #define _ASM_GENERIC_SIGINFO_H
3
4 #include <linux/compiler.h>
5 #include <linux/types.h>
6
7 typedef union sigval {
8 int sival_int;
9 void __user *sival_ptr;
10 } sigval_t;
11
12 /*
13 * This is the size (including padding) of the part of the
14 * struct siginfo that is before the union.
15 */
16 #ifndef __ARCH_SI_PREAMBLE_SIZE
17 #define __ARCH_SI_PREAMBLE_SIZE (3 * sizeof(int))
18 #endif
19
20 #define SI_MAX_SIZE 128
21 #ifndef SI_PAD_SIZE
22 #define SI_PAD_SIZE ((SI_MAX_SIZE - __ARCH_SI_PREAMBLE_SIZE) / sizeof(int))
23 #endif
24
25 #ifndef __ARCH_SI_UID_T
26 #define __ARCH_SI_UID_T __kernel_uid32_t
27 #endif
28
29 /*
30 * The default "si_band" type is "long", as specified by POSIX.
31 * However, some architectures want to override this to "int"
32 * for historical compatibility reasons, so we allow that.
33 */
34 #ifndef __ARCH_SI_BAND_T
35 #define __ARCH_SI_BAND_T long
36 #endif
37
38 #ifndef HAVE_ARCH_SIGINFO_T
39
40 typedef struct siginfo {
41 int si_signo;
42 int si_errno;
43 int si_code;
44
45 union {
46 int _pad[SI_PAD_SIZE];
47
48 /* kill() */
49 struct {
50 __kernel_pid_t _pid; /* sender's pid */
51 __ARCH_SI_UID_T _uid; /* sender's uid */
52 } _kill;
53
54 /* POSIX.1b timers */
55 struct {
56 __kernel_timer_t _tid; /* timer id */
57 int _overrun; /* overrun count */
58 char _pad[sizeof( __ARCH_SI_UID_T) - sizeof(int)];
59 sigval_t _sigval; /* same as below */
60 int _sys_private; /* not to be passed to user */
61 } _timer;
62
63 /* POSIX.1b signals */
64 struct {
65 __kernel_pid_t _pid; /* sender's pid */
66 __ARCH_SI_UID_T _uid; /* sender's uid */
67 sigval_t _sigval;
68 } _rt;
69
70 /* SIGCHLD */
71 struct {
72 __kernel_pid_t _pid; /* which child */
73 __ARCH_SI_UID_T _uid; /* sender's uid */
74 int _status; /* exit code */
75 __kernel_clock_t _utime;
76 __kernel_clock_t _stime;
77 } _sigchld;
78
79 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
80 struct {
81 void __user *_addr; /* faulting insn/memory ref. */
82 #ifdef __ARCH_SI_TRAPNO
83 int _trapno; /* TRAP # which caused the signal */
84 #endif
85 short _addr_lsb; /* LSB of the reported address */
86 } _sigfault;
87
88 /* SIGPOLL */
89 struct {
90 __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
91 int _fd;
92 } _sigpoll;
93 } _sifields;
94 } siginfo_t;
95
96 #endif
97
98 /*
99 * How these fields are to be accessed.
100 */
101 #define si_pid _sifields._kill._pid
102 #define si_uid _sifields._kill._uid
103 #define si_tid _sifields._timer._tid
104 #define si_overrun _sifields._timer._overrun
105 #define si_sys_private _sifields._timer._sys_private
106 #define si_status _sifields._sigchld._status
107 #define si_utime _sifields._sigchld._utime
108 #define si_stime _sifields._sigchld._stime
109 #define si_value _sifields._rt._sigval
110 #define si_int _sifields._rt._sigval.sival_int
111 #define si_ptr _sifields._rt._sigval.sival_ptr
112 #define si_addr _sifields._sigfault._addr
113 #ifdef __ARCH_SI_TRAPNO
114 #define si_trapno _sifields._sigfault._trapno
115 #endif
116 #define si_addr_lsb _sifields._sigfault._addr_lsb
117 #define si_band _sifields._sigpoll._band
118 #define si_fd _sifields._sigpoll._fd
119
120 #ifdef __KERNEL__
121 #define __SI_MASK 0xffff0000u
122 #define __SI_KILL (0 << 16)
123 #define __SI_TIMER (1 << 16)
124 #define __SI_POLL (2 << 16)
125 #define __SI_FAULT (3 << 16)
126 #define __SI_CHLD (4 << 16)
127 #define __SI_RT (5 << 16)
128 #define __SI_MESGQ (6 << 16)
129 #define __SI_CODE(T,N) ((T) | ((N) & 0xffff))
130 #else
131 #define __SI_KILL 0
132 #define __SI_TIMER 0
133 #define __SI_POLL 0
134 #define __SI_FAULT 0
135 #define __SI_CHLD 0
136 #define __SI_RT 0
137 #define __SI_MESGQ 0
138 #define __SI_CODE(T,N) (N)
139 #endif
140
141 /*
142 * si_code values
143 * Digital reserves positive values for kernel-generated signals.
144 */
145 #define SI_USER 0 /* sent by kill, sigsend, raise */
146 #define SI_KERNEL 0x80 /* sent by the kernel from somewhere */
147 #define SI_QUEUE -1 /* sent by sigqueue */
148 #define SI_TIMER __SI_CODE(__SI_TIMER,-2) /* sent by timer expiration */
149 #define SI_MESGQ __SI_CODE(__SI_MESGQ,-3) /* sent by real time mesq state change */
150 #define SI_ASYNCIO -4 /* sent by AIO completion */
151 #define SI_SIGIO -5 /* sent by queued SIGIO */
152 #define SI_TKILL -6 /* sent by tkill system call */
153 #define SI_DETHREAD -7 /* sent by execve() killing subsidiary threads */
154
155 #define SI_FROMUSER(siptr) ((siptr)->si_code <= 0)
156 #define SI_FROMKERNEL(siptr) ((siptr)->si_code > 0)
157
158 /*
159 * SIGILL si_codes
160 */
161 #define ILL_ILLOPC (__SI_FAULT|1) /* illegal opcode */
162 #define ILL_ILLOPN (__SI_FAULT|2) /* illegal operand */
163 #define ILL_ILLADR (__SI_FAULT|3) /* illegal addressing mode */
164 #define ILL_ILLTRP (__SI_FAULT|4) /* illegal trap */
165 #define ILL_PRVOPC (__SI_FAULT|5) /* privileged opcode */
166 #define ILL_PRVREG (__SI_FAULT|6) /* privileged register */
167 #define ILL_COPROC (__SI_FAULT|7) /* coprocessor error */
168 #define ILL_BADSTK (__SI_FAULT|8) /* internal stack error */
169 #define NSIGILL 8
170
171 /*
172 * SIGFPE si_codes
173 */
174 #define FPE_INTDIV (__SI_FAULT|1) /* integer divide by zero */
175 #define FPE_INTOVF (__SI_FAULT|2) /* integer overflow */
176 #define FPE_FLTDIV (__SI_FAULT|3) /* floating point divide by zero */
177 #define FPE_FLTOVF (__SI_FAULT|4) /* floating point overflow */
178 #define FPE_FLTUND (__SI_FAULT|5) /* floating point underflow */
179 #define FPE_FLTRES (__SI_FAULT|6) /* floating point inexact result */
180 #define FPE_FLTINV (__SI_FAULT|7) /* floating point invalid operation */
181 #define FPE_FLTSUB (__SI_FAULT|8) /* subscript out of range */
182 #define NSIGFPE 8
183
184 /*
185 * SIGSEGV si_codes
186 */
187 #define SEGV_MAPERR (__SI_FAULT|1) /* address not mapped to object */
188 #define SEGV_ACCERR (__SI_FAULT|2) /* invalid permissions for mapped object */
189 #define NSIGSEGV 2
190
191 /*
192 * SIGBUS si_codes
193 */
194 #define BUS_ADRALN (__SI_FAULT|1) /* invalid address alignment */
195 #define BUS_ADRERR (__SI_FAULT|2) /* non-existent physical address */
196 #define BUS_OBJERR (__SI_FAULT|3) /* object specific hardware error */
197 /* hardware memory error consumed on a machine check: action required */
198 #define BUS_MCEERR_AR (__SI_FAULT|4)
199 /* hardware memory error detected in process but not consumed: action optional*/
200 #define BUS_MCEERR_AO (__SI_FAULT|5)
201 #define NSIGBUS 5
202
203 /*
204 * SIGTRAP si_codes
205 */
206 #define TRAP_BRKPT (__SI_FAULT|1) /* process breakpoint */
207 #define TRAP_TRACE (__SI_FAULT|2) /* process trace trap */
208 #define TRAP_BRANCH (__SI_FAULT|3) /* process taken branch trap */
209 #define TRAP_HWBKPT (__SI_FAULT|4) /* hardware breakpoint/watchpoint */
210 #define NSIGTRAP 4
211
212 /*
213 * SIGCHLD si_codes
214 */
215 #define CLD_EXITED (__SI_CHLD|1) /* child has exited */
216 #define CLD_KILLED (__SI_CHLD|2) /* child was killed */
217 #define CLD_DUMPED (__SI_CHLD|3) /* child terminated abnormally */
218 #define CLD_TRAPPED (__SI_CHLD|4) /* traced child has trapped */
219 #define CLD_STOPPED (__SI_CHLD|5) /* child has stopped */
220 #define CLD_CONTINUED (__SI_CHLD|6) /* stopped child has continued */
221 #define NSIGCHLD 6
222
223 /*
224 * SIGPOLL si_codes
225 */
226 #define POLL_IN (__SI_POLL|1) /* data input available */
227 #define POLL_OUT (__SI_POLL|2) /* output buffers available */
228 #define POLL_MSG (__SI_POLL|3) /* input message available */
229 #define POLL_ERR (__SI_POLL|4) /* i/o error */
230 #define POLL_PRI (__SI_POLL|5) /* high priority input available */
231 #define POLL_HUP (__SI_POLL|6) /* device disconnected */
232 #define NSIGPOLL 6
233
234 /*
235 * sigevent definitions
236 *
237 * It seems likely that SIGEV_THREAD will have to be handled from
238 * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
239 * thread manager then catches and does the appropriate nonsense.
240 * However, everything is written out here so as to not get lost.
241 */
242 #define SIGEV_SIGNAL 0 /* notify via signal */
243 #define SIGEV_NONE 1 /* other notification: meaningless */
244 #define SIGEV_THREAD 2 /* deliver via thread creation */
245 #define SIGEV_THREAD_ID 4 /* deliver to thread */
246
247 /*
248 * This works because the alignment is ok on all current architectures
249 * but we leave open this being overridden in the future
250 */
251 #ifndef __ARCH_SIGEV_PREAMBLE_SIZE
252 #define __ARCH_SIGEV_PREAMBLE_SIZE (sizeof(int) * 2 + sizeof(sigval_t))
253 #endif
254
255 #define SIGEV_MAX_SIZE 64
256 #define SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
257 / sizeof(int))
258
259 typedef struct sigevent {
260 sigval_t sigev_value;
261 int sigev_signo;
262 int sigev_notify;
263 union {
264 int _pad[SIGEV_PAD_SIZE];
265 int _tid;
266
267 struct {
268 void (*_function)(sigval_t);
269 void *_attribute; /* really pthread_attr_t */
270 } _sigev_thread;
271 } _sigev_un;
272 } sigevent_t;
273
274 #define sigev_notify_function _sigev_un._sigev_thread._function
275 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute
276 #define sigev_notify_thread_id _sigev_un._tid
277
278 #ifdef __KERNEL__
279
280 struct siginfo;
281 void do_schedule_next_timer(struct siginfo *info);
282
283 #ifndef HAVE_ARCH_COPY_SIGINFO
284
285 #include <linux/string.h>
286
copy_siginfo(struct siginfo * to,struct siginfo * from)287 static inline void copy_siginfo(struct siginfo *to, struct siginfo *from)
288 {
289 if (from->si_code < 0)
290 memcpy(to, from, sizeof(*to));
291 else
292 /* _sigchld is currently the largest know union member */
293 memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld));
294 }
295
296 #endif
297
298 extern int copy_siginfo_to_user(struct siginfo __user *to, struct siginfo *from);
299
300 #endif /* __KERNEL__ */
301
302 #endif
303