Root/include/asm-generic/siginfo.h

1#ifndef _ASM_GENERIC_SIGINFO_H
2#define _ASM_GENERIC_SIGINFO_H
3
4#include <linux/compiler.h>
5#include <linux/types.h>
6
7typedef 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
40typedef 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
259typedef 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
280struct siginfo;
281void do_schedule_next_timer(struct siginfo *info);
282
283#ifndef HAVE_ARCH_COPY_SIGINFO
284
285#include <linux/string.h>
286
287static 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
298extern int copy_siginfo_to_user(struct siginfo __user *to, struct siginfo *from);
299
300#endif /* __KERNEL__ */
301
302#endif
303

Archive Download this file



interactive