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Linux/include/asm-generic/siginfo.h

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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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