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 __ARCH_SI_CLOCK_T
39 #define __ARCH_SI_CLOCK_T __kernel_clock_t
40 #endif
41
42 #ifndef __ARCH_SI_ATTRIBUTES
43 #define __ARCH_SI_ATTRIBUTES
44 #endif
45
46 #ifndef HAVE_ARCH_SIGINFO_T
47
48 typedef struct siginfo {
49 int si_signo;
50 int si_errno;
51 int si_code;
52
53 union {
54 int _pad[SI_PAD_SIZE];
55
56 /* kill() */
57 struct {
58 __kernel_pid_t _pid; /* sender's pid */
59 __ARCH_SI_UID_T _uid; /* sender's uid */
60 } _kill;
61
62 /* POSIX.1b timers */
63 struct {
64 __kernel_timer_t _tid; /* timer id */
65 int _overrun; /* overrun count */
66 char _pad[sizeof( __ARCH_SI_UID_T) - sizeof(int)];
67 sigval_t _sigval; /* same as below */
68 int _sys_private; /* not to be passed to user */
69 } _timer;
70
71 /* POSIX.1b signals */
72 struct {
73 __kernel_pid_t _pid; /* sender's pid */
74 __ARCH_SI_UID_T _uid; /* sender's uid */
75 sigval_t _sigval;
76 } _rt;
77
78 /* SIGCHLD */
79 struct {
80 __kernel_pid_t _pid; /* which child */
81 __ARCH_SI_UID_T _uid; /* sender's uid */
82 int _status; /* exit code */
83 __ARCH_SI_CLOCK_T _utime;
84 __ARCH_SI_CLOCK_T _stime;
85 } _sigchld;
86
87 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
88 struct {
89 void __user *_addr; /* faulting insn/memory ref. */
90 #ifdef __ARCH_SI_TRAPNO
91 int _trapno; /* TRAP # which caused the signal */
92 #endif
93 short _addr_lsb; /* LSB of the reported address */
94 } _sigfault;
95
96 /* SIGPOLL */
97 struct {
98 __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
99 int _fd;
100 } _sigpoll;
101 } _sifields;
102 } __ARCH_SI_ATTRIBUTES siginfo_t;
103
104 #endif
105
106 /*
107 * How these fields are to be accessed.
108 */
109 #define si_pid _sifields._kill._pid
110 #define si_uid _sifields._kill._uid
111 #define si_tid _sifields._timer._tid
112 #define si_overrun _sifields._timer._overrun
113 #define si_sys_private _sifields._timer._sys_private
114 #define si_status _sifields._sigchld._status
115 #define si_utime _sifields._sigchld._utime
116 #define si_stime _sifields._sigchld._stime
117 #define si_value _sifields._rt._sigval
118 #define si_int _sifields._rt._sigval.sival_int
119 #define si_ptr _sifields._rt._sigval.sival_ptr
120 #define si_addr _sifields._sigfault._addr
121 #ifdef __ARCH_SI_TRAPNO
122 #define si_trapno _sifields._sigfault._trapno
123 #endif
124 #define si_addr_lsb _sifields._sigfault._addr_lsb
125 #define si_band _sifields._sigpoll._band
126 #define si_fd _sifields._sigpoll._fd
127
128 #ifdef __KERNEL__
129 #define __SI_MASK 0xffff0000u
130 #define __SI_KILL (0 << 16)
131 #define __SI_TIMER (1 << 16)
132 #define __SI_POLL (2 << 16)
133 #define __SI_FAULT (3 << 16)
134 #define __SI_CHLD (4 << 16)
135 #define __SI_RT (5 << 16)
136 #define __SI_MESGQ (6 << 16)
137 #define __SI_CODE(T,N) ((T) | ((N) & 0xffff))
138 #else
139 #define __SI_KILL 0
140 #define __SI_TIMER 0
141 #define __SI_POLL 0
142 #define __SI_FAULT 0
143 #define __SI_CHLD 0
144 #define __SI_RT 0
145 #define __SI_MESGQ 0
146 #define __SI_CODE(T,N) (N)
147 #endif
148
149 /*
150 * si_code values
151 * Digital reserves positive values for kernel-generated signals.
152 */
153 #define SI_USER 0 /* sent by kill, sigsend, raise */
154 #define SI_KERNEL 0x80 /* sent by the kernel from somewhere */
155 #define SI_QUEUE -1 /* sent by sigqueue */
156 #define SI_TIMER __SI_CODE(__SI_TIMER,-2) /* sent by timer expiration */
157 #define SI_MESGQ __SI_CODE(__SI_MESGQ,-3) /* sent by real time mesq state change */
158 #define SI_ASYNCIO -4 /* sent by AIO completion */
159 #define SI_SIGIO -5 /* sent by queued SIGIO */
160 #define SI_TKILL -6 /* sent by tkill system call */
161 #define SI_DETHREAD -7 /* sent by execve() killing subsidiary threads */
162
163 #define SI_FROMUSER(siptr) ((siptr)->si_code <= 0)
164 #define SI_FROMKERNEL(siptr) ((siptr)->si_code > 0)
165
166 /*
167 * SIGILL si_codes
168 */
169 #define ILL_ILLOPC (__SI_FAULT|1) /* illegal opcode */
170 #define ILL_ILLOPN (__SI_FAULT|2) /* illegal operand */
171 #define ILL_ILLADR (__SI_FAULT|3) /* illegal addressing mode */
172 #define ILL_ILLTRP (__SI_FAULT|4) /* illegal trap */
173 #define ILL_PRVOPC (__SI_FAULT|5) /* privileged opcode */
174 #define ILL_PRVREG (__SI_FAULT|6) /* privileged register */
175 #define ILL_COPROC (__SI_FAULT|7) /* coprocessor error */
176 #define ILL_BADSTK (__SI_FAULT|8) /* internal stack error */
177 #define NSIGILL 8
178
179 /*
180 * SIGFPE si_codes
181 */
182 #define FPE_INTDIV (__SI_FAULT|1) /* integer divide by zero */
183 #define FPE_INTOVF (__SI_FAULT|2) /* integer overflow */
184 #define FPE_FLTDIV (__SI_FAULT|3) /* floating point divide by zero */
185 #define FPE_FLTOVF (__SI_FAULT|4) /* floating point overflow */
186 #define FPE_FLTUND (__SI_FAULT|5) /* floating point underflow */
187 #define FPE_FLTRES (__SI_FAULT|6) /* floating point inexact result */
188 #define FPE_FLTINV (__SI_FAULT|7) /* floating point invalid operation */
189 #define FPE_FLTSUB (__SI_FAULT|8) /* subscript out of range */
190 #define NSIGFPE 8
191
192 /*
193 * SIGSEGV si_codes
194 */
195 #define SEGV_MAPERR (__SI_FAULT|1) /* address not mapped to object */
196 #define SEGV_ACCERR (__SI_FAULT|2) /* invalid permissions for mapped object */
197 #define NSIGSEGV 2
198
199 /*
200 * SIGBUS si_codes
201 */
202 #define BUS_ADRALN (__SI_FAULT|1) /* invalid address alignment */
203 #define BUS_ADRERR (__SI_FAULT|2) /* non-existent physical address */
204 #define BUS_OBJERR (__SI_FAULT|3) /* object specific hardware error */
205 /* hardware memory error consumed on a machine check: action required */
206 #define BUS_MCEERR_AR (__SI_FAULT|4)
207 /* hardware memory error detected in process but not consumed: action optional*/
208 #define BUS_MCEERR_AO (__SI_FAULT|5)
209 #define NSIGBUS 5
210
211 /*
212 * SIGTRAP si_codes
213 */
214 #define TRAP_BRKPT (__SI_FAULT|1) /* process breakpoint */
215 #define TRAP_TRACE (__SI_FAULT|2) /* process trace trap */
216 #define TRAP_BRANCH (__SI_FAULT|3) /* process taken branch trap */
217 #define TRAP_HWBKPT (__SI_FAULT|4) /* hardware breakpoint/watchpoint */
218 #define NSIGTRAP 4
219
220 /*
221 * SIGCHLD si_codes
222 */
223 #define CLD_EXITED (__SI_CHLD|1) /* child has exited */
224 #define CLD_KILLED (__SI_CHLD|2) /* child was killed */
225 #define CLD_DUMPED (__SI_CHLD|3) /* child terminated abnormally */
226 #define CLD_TRAPPED (__SI_CHLD|4) /* traced child has trapped */
227 #define CLD_STOPPED (__SI_CHLD|5) /* child has stopped */
228 #define CLD_CONTINUED (__SI_CHLD|6) /* stopped child has continued */
229 #define NSIGCHLD 6
230
231 /*
232 * SIGPOLL si_codes
233 */
234 #define POLL_IN (__SI_POLL|1) /* data input available */
235 #define POLL_OUT (__SI_POLL|2) /* output buffers available */
236 #define POLL_MSG (__SI_POLL|3) /* input message available */
237 #define POLL_ERR (__SI_POLL|4) /* i/o error */
238 #define POLL_PRI (__SI_POLL|5) /* high priority input available */
239 #define POLL_HUP (__SI_POLL|6) /* device disconnected */
240 #define NSIGPOLL 6
241
242 /*
243 * sigevent definitions
244 *
245 * It seems likely that SIGEV_THREAD will have to be handled from
246 * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
247 * thread manager then catches and does the appropriate nonsense.
248 * However, everything is written out here so as to not get lost.
249 */
250 #define SIGEV_SIGNAL 0 /* notify via signal */
251 #define SIGEV_NONE 1 /* other notification: meaningless */
252 #define SIGEV_THREAD 2 /* deliver via thread creation */
253 #define SIGEV_THREAD_ID 4 /* deliver to thread */
254
255 /*
256 * This works because the alignment is ok on all current architectures
257 * but we leave open this being overridden in the future
258 */
259 #ifndef __ARCH_SIGEV_PREAMBLE_SIZE
260 #define __ARCH_SIGEV_PREAMBLE_SIZE (sizeof(int) * 2 + sizeof(sigval_t))
261 #endif
262
263 #define SIGEV_MAX_SIZE 64
264 #define SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
265 / sizeof(int))
266
267 typedef struct sigevent {
268 sigval_t sigev_value;
269 int sigev_signo;
270 int sigev_notify;
271 union {
272 int _pad[SIGEV_PAD_SIZE];
273 int _tid;
274
275 struct {
276 void (*_function)(sigval_t);
277 void *_attribute; /* really pthread_attr_t */
278 } _sigev_thread;
279 } _sigev_un;
280 } sigevent_t;
281
282 #define sigev_notify_function _sigev_un._sigev_thread._function
283 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute
284 #define sigev_notify_thread_id _sigev_un._tid
285
286 #ifdef __KERNEL__
287
288 struct siginfo;
289 void do_schedule_next_timer(struct siginfo *info);
290
291 #ifndef HAVE_ARCH_COPY_SIGINFO
292
293 #include <linux/string.h>
294
copy_siginfo(struct siginfo * to,struct siginfo * from)295 static inline void copy_siginfo(struct siginfo *to, struct siginfo *from)
296 {
297 if (from->si_code < 0)
298 memcpy(to, from, sizeof(*to));
299 else
300 /* _sigchld is currently the largest know union member */
301 memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld));
302 }
303
304 #endif
305
306 extern int copy_siginfo_to_user(struct siginfo __user *to, struct siginfo *from);
307
308 #endif /* __KERNEL__ */
309
310 #endif
311