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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-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 | |
300 | #endif /* __KERNEL__ */ |
301 | |
302 | #endif |
303 |
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