sysdeps/unix/sysv/linux/bits/siginfo.h

   1 /* siginfo_t, sigevent and constants.  Linux version.
   2    Copyright (C) 1997-2002, 2003, 2011 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #if !defined _SIGNAL_H && !defined __need_siginfo_t \
  20     && !defined __need_sigevent_t
  21 # error "Never include this file directly.  Use <signal.h> instead"
  22 #endif
  23
  24 #include <bits/wordsize.h>
  25
  26 #if (!defined __have_sigval_t \
  27      && (defined _SIGNAL_H || defined __need_siginfo_t \
  28          || defined __need_sigevent_t))
  29 # define __have_sigval_t        1
  30
  31 /* Type for data associated with a signal.  */
  32 typedef union sigval
  33   {
  34     int sival_int;
  35     void *sival_ptr;
  36   } sigval_t;
  37 #endif
  38
  39 #if (!defined __have_siginfo_t \
  40      && (defined _SIGNAL_H || defined __need_siginfo_t))
  41 # define __have_siginfo_t       1
  42
  43 # define __SI_MAX_SIZE     128
  44 # if __WORDSIZE == 64
  45 #  define __SI_PAD_SIZE     ((__SI_MAX_SIZE / sizeof (int)) - 4)
  46 # else
  47 #  define __SI_PAD_SIZE     ((__SI_MAX_SIZE / sizeof (int)) - 3)
  48 # endif
  49
  50 typedef struct siginfo
  51   {
  52     int si_signo;               /* Signal number.  */
  53     int si_errno;               /* If non-zero, an errno value associated with
  54                                    this signal, as defined in <errno.h>.  */
  55     int si_code;                /* Signal code.  */
  56
  57     union
  58       {
  59         int _pad[__SI_PAD_SIZE];
  60
  61          /* kill().  */
  62         struct
  63           {
  64             __pid_t si_pid;     /* Sending process ID.  */
  65             __uid_t si_uid;     /* Real user ID of sending process.  */
  66           } _kill;
  67
  68         /* POSIX.1b timers.  */
  69         struct
  70           {
  71             int si_tid;         /* Timer ID.  */
  72             int si_overrun;     /* Overrun count.  */
  73             sigval_t si_sigval; /* Signal value.  */
  74           } _timer;
  75
  76         /* POSIX.1b signals.  */
  77         struct
  78           {
  79             __pid_t si_pid;     /* Sending process ID.  */
  80             __uid_t si_uid;     /* Real user ID of sending process.  */
  81             sigval_t si_sigval; /* Signal value.  */
  82           } _rt;
  83
  84         /* SIGCHLD.  */
  85         struct
  86           {
  87             __pid_t si_pid;     /* Which child.  */
  88             __uid_t si_uid;     /* Real user ID of sending process.  */
  89             int si_status;      /* Exit value or signal.  */
  90             __clock_t si_utime;
  91             __clock_t si_stime;
  92           } _sigchld;
  93
  94         /* SIGILL, SIGFPE, SIGSEGV, SIGBUS.  */
  95         struct
  96           {
  97             void *si_addr;      /* Faulting insn/memory ref.  */
  98           } _sigfault;
  99
 100         /* SIGPOLL.  */
 101         struct
 102           {
 103             long int si_band;   /* Band event for SIGPOLL.  */
 104             int si_fd;
 105           } _sigpoll;
 106       } _sifields;
 107   } siginfo_t;
 108
 109
 110 /* X/Open requires some more fields with fixed names.  */
 111 # define si_pid         _sifields._kill.si_pid
 112 # define si_uid         _sifields._kill.si_uid
 113 # define si_timerid     _sifields._timer.si_tid
 114 # define si_overrun     _sifields._timer.si_overrun
 115 # define si_status      _sifields._sigchld.si_status
 116 # define si_utime       _sifields._sigchld.si_utime
 117 # define si_stime       _sifields._sigchld.si_stime
 118 # define si_value       _sifields._rt.si_sigval
 119 # define si_int         _sifields._rt.si_sigval.sival_int
 120 # define si_ptr         _sifields._rt.si_sigval.sival_ptr
 121 # define si_addr        _sifields._sigfault.si_addr
 122 # define si_band        _sifields._sigpoll.si_band
 123 # define si_fd          _sifields._sigpoll.si_fd
 124
 125
 126 /* Values for `si_code'.  Positive values are reserved for kernel-generated
 127    signals.  */
 128 enum
 129 {
 130   SI_ASYNCNL = -60,             /* Sent by asynch name lookup completion.  */
 131 # define SI_ASYNCNL     SI_ASYNCNL
 132   SI_TKILL = -6,                /* Sent by tkill.  */
 133 # define SI_TKILL       SI_TKILL
 134   SI_SIGIO,                     /* Sent by queued SIGIO. */
 135 # define SI_SIGIO       SI_SIGIO
 136   SI_ASYNCIO,                   /* Sent by AIO completion.  */
 137 # define SI_ASYNCIO     SI_ASYNCIO
 138   SI_MESGQ,                     /* Sent by real time mesq state change.  */
 139 # define SI_MESGQ       SI_MESGQ
 140   SI_TIMER,                     /* Sent by timer expiration.  */
 141 # define SI_TIMER       SI_TIMER
 142   SI_QUEUE,                     /* Sent by sigqueue.  */
 143 # define SI_QUEUE       SI_QUEUE
 144   SI_USER,                      /* Sent by kill, sigsend.  */
 145 # define SI_USER        SI_USER
 146   SI_KERNEL = 0x80              /* Send by kernel.  */
 147 #define SI_KERNEL       SI_KERNEL
 148 };
 149
 150
 151 /* `si_code' values for SIGILL signal.  */
 152 enum
 153 {
 154   ILL_ILLOPC = 1,               /* Illegal opcode.  */
 155 # define ILL_ILLOPC     ILL_ILLOPC
 156   ILL_ILLOPN,                   /* Illegal operand.  */
 157 # define ILL_ILLOPN     ILL_ILLOPN
 158   ILL_ILLADR,                   /* Illegal addressing mode.  */
 159 # define ILL_ILLADR     ILL_ILLADR
 160   ILL_ILLTRP,                   /* Illegal trap. */
 161 # define ILL_ILLTRP     ILL_ILLTRP
 162   ILL_PRVOPC,                   /* Privileged opcode.  */
 163 # define ILL_PRVOPC     ILL_PRVOPC
 164   ILL_PRVREG,                   /* Privileged register.  */
 165 # define ILL_PRVREG     ILL_PRVREG
 166   ILL_COPROC,                   /* Coprocessor error.  */
 167 # define ILL_COPROC     ILL_COPROC
 168   ILL_BADSTK                    /* Internal stack error.  */
 169 # define ILL_BADSTK     ILL_BADSTK
 170 };
 171
 172 /* `si_code' values for SIGFPE signal.  */
 173 enum
 174 {
 175   FPE_INTDIV = 1,               /* Integer divide by zero.  */
 176 # define FPE_INTDIV     FPE_INTDIV
 177   FPE_INTOVF,                   /* Integer overflow.  */
 178 # define FPE_INTOVF     FPE_INTOVF
 179   FPE_FLTDIV,                   /* Floating point divide by zero.  */
 180 # define FPE_FLTDIV     FPE_FLTDIV
 181   FPE_FLTOVF,                   /* Floating point overflow.  */
 182 # define FPE_FLTOVF     FPE_FLTOVF
 183   FPE_FLTUND,                   /* Floating point underflow.  */
 184 # define FPE_FLTUND     FPE_FLTUND
 185   FPE_FLTRES,                   /* Floating point inexact result.  */
 186 # define FPE_FLTRES     FPE_FLTRES
 187   FPE_FLTINV,                   /* Floating point invalid operation.  */
 188 # define FPE_FLTINV     FPE_FLTINV
 189   FPE_FLTSUB                    /* Subscript out of range.  */
 190 # define FPE_FLTSUB     FPE_FLTSUB
 191 };
 192
 193 /* `si_code' values for SIGSEGV signal.  */
 194 enum
 195 {
 196   SEGV_MAPERR = 1,              /* Address not mapped to object.  */
 197 # define SEGV_MAPERR    SEGV_MAPERR
 198   SEGV_ACCERR                   /* Invalid permissions for mapped object.  */
 199 # define SEGV_ACCERR    SEGV_ACCERR
 200 };
 201
 202 /* `si_code' values for SIGBUS signal.  */
 203 enum
 204 {
 205   BUS_ADRALN = 1,               /* Invalid address alignment.  */
 206 # define BUS_ADRALN     BUS_ADRALN
 207   BUS_ADRERR,                   /* Non-existant physical address.  */
 208 # define BUS_ADRERR     BUS_ADRERR
 209   BUS_OBJERR                    /* Object specific hardware error.  */
 210 # define BUS_OBJERR     BUS_OBJERR
 211 };
 212
 213 /* `si_code' values for SIGTRAP signal.  */
 214 enum
 215 {
 216   TRAP_BRKPT = 1,               /* Process breakpoint.  */
 217 # define TRAP_BRKPT     TRAP_BRKPT
 218   TRAP_TRACE                    /* Process trace trap.  */
 219 # define TRAP_TRACE     TRAP_TRACE
 220 };
 221
 222 /* `si_code' values for SIGCHLD signal.  */
 223 enum
 224 {
 225   CLD_EXITED = 1,               /* Child has exited.  */
 226 # define CLD_EXITED     CLD_EXITED
 227   CLD_KILLED,                   /* Child was killed.  */
 228 # define CLD_KILLED     CLD_KILLED
 229   CLD_DUMPED,                   /* Child terminated abnormally.  */
 230 # define CLD_DUMPED     CLD_DUMPED
 231   CLD_TRAPPED,                  /* Traced child has trapped.  */
 232 # define CLD_TRAPPED    CLD_TRAPPED
 233   CLD_STOPPED,                  /* Child has stopped.  */
 234 # define CLD_STOPPED    CLD_STOPPED
 235   CLD_CONTINUED                 /* Stopped child has continued.  */
 236 # define CLD_CONTINUED  CLD_CONTINUED
 237 };
 238
 239 /* `si_code' values for SIGPOLL signal.  */
 240 enum
 241 {
 242   POLL_IN = 1,                  /* Data input available.  */
 243 # define POLL_IN        POLL_IN
 244   POLL_OUT,                     /* Output buffers available.  */
 245 # define POLL_OUT       POLL_OUT
 246   POLL_MSG,                     /* Input message available.   */
 247 # define POLL_MSG       POLL_MSG
 248   POLL_ERR,                     /* I/O error.  */
 249 # define POLL_ERR       POLL_ERR
 250   POLL_PRI,                     /* High priority input available.  */
 251 # define POLL_PRI       POLL_PRI
 252   POLL_HUP                      /* Device disconnected.  */
 253 # define POLL_HUP       POLL_HUP
 254 };
 255
 256 # undef __need_siginfo_t
 257 #endif  /* !have siginfo_t && (have _SIGNAL_H || need siginfo_t).  */
 258
 259
 260 #if (defined _SIGNAL_H || defined __need_sigevent_t) \
 261     && !defined __have_sigevent_t
 262 # define __have_sigevent_t      1
 263
 264 /* Structure to transport application-defined values with signals.  */
 265 # define __SIGEV_MAX_SIZE       64
 266 # if __WORDSIZE == 64
 267 #  define __SIGEV_PAD_SIZE      ((__SIGEV_MAX_SIZE / sizeof (int)) - 4)
 268 # else
 269 #  define __SIGEV_PAD_SIZE      ((__SIGEV_MAX_SIZE / sizeof (int)) - 3)
 270 # endif
 271
 272 typedef struct sigevent
 273   {
 274     sigval_t sigev_value;
 275     int sigev_signo;
 276     int sigev_notify;
 277
 278     union
 279       {
 280         int _pad[__SIGEV_PAD_SIZE];
 281
 282         /* When SIGEV_SIGNAL and SIGEV_THREAD_ID set, LWP ID of the
 283            thread to receive the signal.  */
 284         __pid_t _tid;
 285
 286         struct
 287           {
 288             void (*_function) (sigval_t);       /* Function to start.  */
 289             void *_attribute;                   /* Really pthread_attr_t.  */
 290           } _sigev_thread;
 291       } _sigev_un;
 292   } sigevent_t;
 293
 294 /* POSIX names to access some of the members.  */
 295 # define sigev_notify_function   _sigev_un._sigev_thread._function
 296 # define sigev_notify_attributes _sigev_un._sigev_thread._attribute
 297
 298 /* `sigev_notify' values.  */
 299 enum
 300 {
 301   SIGEV_SIGNAL = 0,             /* Notify via signal.  */
 302 # define SIGEV_SIGNAL   SIGEV_SIGNAL
 303   SIGEV_NONE,                   /* Other notification: meaningless.  */
 304 # define SIGEV_NONE     SIGEV_NONE
 305   SIGEV_THREAD,                 /* Deliver via thread creation.  */
 306 # define SIGEV_THREAD   SIGEV_THREAD
 307
 308   SIGEV_THREAD_ID = 4           /* Send signal to specific thread.  */
 309 #define SIGEV_THREAD_ID SIGEV_THREAD_ID
 310 };
 311
 312 #endif  /* have _SIGNAL_H.  */