Line data Source code
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 1 : } sigval_t;
11 8 :
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 1 : } 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-existant 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 :
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 1 :
300 : #endif /* __KERNEL__ */
301 :
302 : #endif
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