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

   1 /* siginfo_t, sigevent and constants.  Linux version.
   2    Copyright (C) 1997-2015 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
  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             short int si_addr_lsb;      /* Valid LSB of the reported address.  */
  99           } _sigfault;
 100
 101         /* SIGPOLL.  */
 102         struct
 103           {
 104             long int si_band;   /* Band event for SIGPOLL.  */
 105             int si_fd;
 106           } _sigpoll;
 107
 108         /* SIGSYS.  */
 109         struct
 110           {
 111             void *_call_addr;   /* Calling user insn.  */
 112             int _syscall;       /* Triggering system call number.  */
 113             unsigned int _arch; /* AUDIT_ARCH_* of syscall.  */
 114           } _sigsys;
 115       } _sifields;
 116   } siginfo_t;
 117
 118
 119 /* X/Open requires some more fields with fixed names.  */
 120 # define si_pid         _sifields._kill.si_pid
 121 # define si_uid         _sifields._kill.si_uid
 122 # define si_timerid     _sifields._timer.si_tid
 123 # define si_overrun     _sifields._timer.si_overrun
 124 # define si_status      _sifields._sigchld.si_status
 125 # define si_utime       _sifields._sigchld.si_utime
 126 # define si_stime       _sifields._sigchld.si_stime
 127 # define si_value       _sifields._rt.si_sigval
 128 # define si_int         _sifields._rt.si_sigval.sival_int
 129 # define si_ptr         _sifields._rt.si_sigval.sival_ptr
 130 # define si_addr        _sifields._sigfault.si_addr
 131 # define si_addr_lsb    _sifields._sigfault.si_addr_lsb
 132 # define si_band        _sifields._sigpoll.si_band
 133 # define si_fd          _sifields._sigpoll.si_fd
 134 # define si_call_addr   _sifields._sigsys._call_addr
 135 # define si_syscall     _sifields._sigsys._syscall
 136 # define si_arch        _sifields._sigsys._arch
 137
 138
 139 /* Values for `si_code'.  Positive values are reserved for kernel-generated
 140    signals.  */
 141 enum
 142 {
 143   SI_ASYNCNL = -60,             /* Sent by asynch name lookup completion.  */
 144 # define SI_ASYNCNL     SI_ASYNCNL
 145   SI_TKILL = -6,                /* Sent by tkill.  */
 146 # define SI_TKILL       SI_TKILL
 147   SI_SIGIO,                     /* Sent by queued SIGIO. */
 148 # define SI_SIGIO       SI_SIGIO
 149   SI_ASYNCIO,                   /* Sent by AIO completion.  */
 150 # define SI_ASYNCIO     SI_ASYNCIO
 151   SI_MESGQ,                     /* Sent by real time mesq state change.  */
 152 # define SI_MESGQ       SI_MESGQ
 153   SI_TIMER,                     /* Sent by timer expiration.  */
 154 # define SI_TIMER       SI_TIMER
 155   SI_QUEUE,                     /* Sent by sigqueue.  */
 156 # define SI_QUEUE       SI_QUEUE
 157   SI_USER,                      /* Sent by kill, sigsend.  */
 158 # define SI_USER        SI_USER
 159   SI_KERNEL = 0x80              /* Send by kernel.  */
 160 #define SI_KERNEL       SI_KERNEL
 161 };
 162
 163
 164 # if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
 165 /* `si_code' values for SIGILL signal.  */
 166 enum
 167 {
 168   ILL_ILLOPC = 1,               /* Illegal opcode.  */
 169 #  define ILL_ILLOPC    ILL_ILLOPC
 170   ILL_ILLOPN,                   /* Illegal operand.  */
 171 #  define ILL_ILLOPN    ILL_ILLOPN
 172   ILL_ILLADR,                   /* Illegal addressing mode.  */
 173 #  define ILL_ILLADR    ILL_ILLADR
 174   ILL_ILLTRP,                   /* Illegal trap. */
 175 #  define ILL_ILLTRP    ILL_ILLTRP
 176   ILL_PRVOPC,                   /* Privileged opcode.  */
 177 #  define ILL_PRVOPC    ILL_PRVOPC
 178   ILL_PRVREG,                   /* Privileged register.  */
 179 #  define ILL_PRVREG    ILL_PRVREG
 180   ILL_COPROC,                   /* Coprocessor error.  */
 181 #  define ILL_COPROC    ILL_COPROC
 182   ILL_BADSTK                    /* Internal stack error.  */
 183 #  define ILL_BADSTK    ILL_BADSTK
 184 };
 185
 186 /* `si_code' values for SIGFPE signal.  */
 187 enum
 188 {
 189   FPE_INTDIV = 1,               /* Integer divide by zero.  */
 190 #  define FPE_INTDIV    FPE_INTDIV
 191   FPE_INTOVF,                   /* Integer overflow.  */
 192 #  define FPE_INTOVF    FPE_INTOVF
 193   FPE_FLTDIV,                   /* Floating point divide by zero.  */
 194 #  define FPE_FLTDIV    FPE_FLTDIV
 195   FPE_FLTOVF,                   /* Floating point overflow.  */
 196 #  define FPE_FLTOVF    FPE_FLTOVF
 197   FPE_FLTUND,                   /* Floating point underflow.  */
 198 #  define FPE_FLTUND    FPE_FLTUND
 199   FPE_FLTRES,                   /* Floating point inexact result.  */
 200 #  define FPE_FLTRES    FPE_FLTRES
 201   FPE_FLTINV,                   /* Floating point invalid operation.  */
 202 #  define FPE_FLTINV    FPE_FLTINV
 203   FPE_FLTSUB                    /* Subscript out of range.  */
 204 #  define FPE_FLTSUB    FPE_FLTSUB
 205 };
 206
 207 /* `si_code' values for SIGSEGV signal.  */
 208 enum
 209 {
 210   SEGV_MAPERR = 1,              /* Address not mapped to object.  */
 211 #  define SEGV_MAPERR   SEGV_MAPERR
 212   SEGV_ACCERR                   /* Invalid permissions for mapped object.  */
 213 #  define SEGV_ACCERR   SEGV_ACCERR
 214 };
 215
 216 /* `si_code' values for SIGBUS signal.  */
 217 enum
 218 {
 219   BUS_ADRALN = 1,               /* Invalid address alignment.  */
 220 #  define BUS_ADRALN    BUS_ADRALN
 221   BUS_ADRERR,                   /* Non-existant physical address.  */
 222 #  define BUS_ADRERR    BUS_ADRERR
 223   BUS_OBJERR,                   /* Object specific hardware error.  */
 224 #  define BUS_OBJERR    BUS_OBJERR
 225   BUS_MCEERR_AR,                /* Hardware memory error: action required.  */
 226 #  define BUS_MCEERR_AR BUS_MCEERR_AR
 227   BUS_MCEERR_AO                 /* Hardware memory error: action optional.  */
 228 #  define BUS_MCEERR_AO BUS_MCEERR_AO
 229 };
 230 # endif
 231
 232 # ifdef __USE_XOPEN_EXTENDED
 233 /* `si_code' values for SIGTRAP signal.  */
 234 enum
 235 {
 236   TRAP_BRKPT = 1,               /* Process breakpoint.  */
 237 #  define TRAP_BRKPT    TRAP_BRKPT
 238   TRAP_TRACE                    /* Process trace trap.  */
 239 #  define TRAP_TRACE    TRAP_TRACE
 240 };
 241 # endif
 242
 243 # if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
 244 /* `si_code' values for SIGCHLD signal.  */
 245 enum
 246 {
 247   CLD_EXITED = 1,               /* Child has exited.  */
 248 #  define CLD_EXITED    CLD_EXITED
 249   CLD_KILLED,                   /* Child was killed.  */
 250 #  define CLD_KILLED    CLD_KILLED
 251   CLD_DUMPED,                   /* Child terminated abnormally.  */
 252 #  define CLD_DUMPED    CLD_DUMPED
 253   CLD_TRAPPED,                  /* Traced child has trapped.  */
 254 #  define CLD_TRAPPED   CLD_TRAPPED
 255   CLD_STOPPED,                  /* Child has stopped.  */
 256 #  define CLD_STOPPED   CLD_STOPPED
 257   CLD_CONTINUED                 /* Stopped child has continued.  */
 258 #  define CLD_CONTINUED CLD_CONTINUED
 259 };
 260
 261 /* `si_code' values for SIGPOLL signal.  */
 262 enum
 263 {
 264   POLL_IN = 1,                  /* Data input available.  */
 265 #  define POLL_IN       POLL_IN
 266   POLL_OUT,                     /* Output buffers available.  */
 267 #  define POLL_OUT      POLL_OUT
 268   POLL_MSG,                     /* Input message available.   */
 269 #  define POLL_MSG      POLL_MSG
 270   POLL_ERR,                     /* I/O error.  */
 271 #  define POLL_ERR      POLL_ERR
 272   POLL_PRI,                     /* High priority input available.  */
 273 #  define POLL_PRI      POLL_PRI
 274   POLL_HUP                      /* Device disconnected.  */
 275 #  define POLL_HUP      POLL_HUP
 276 };
 277 # endif
 278
 279 # undef __need_siginfo_t
 280 #endif  /* !have siginfo_t && (have _SIGNAL_H || need siginfo_t).  */
 281
 282
 283 #if (defined _SIGNAL_H || defined __need_sigevent_t) \
 284     && !defined __have_sigevent_t
 285 # define __have_sigevent_t      1
 286
 287 /* Structure to transport application-defined values with signals.  */
 288 # define __SIGEV_MAX_SIZE       64
 289 # if __WORDSIZE == 64
 290 #  define __SIGEV_PAD_SIZE      ((__SIGEV_MAX_SIZE / sizeof (int)) - 4)
 291 # else
 292 #  define __SIGEV_PAD_SIZE      ((__SIGEV_MAX_SIZE / sizeof (int)) - 3)
 293 # endif
 294
 295 /* Forward declaration.  */
 296 # ifndef __have_pthread_attr_t
 297 typedef union pthread_attr_t pthread_attr_t;
 298 #  define __have_pthread_attr_t 1
 299 # endif
 300
 301 typedef struct sigevent
 302   {
 303     sigval_t sigev_value;
 304     int sigev_signo;
 305     int sigev_notify;
 306
 307     union
 308       {
 309         int _pad[__SIGEV_PAD_SIZE];
 310
 311         /* When SIGEV_SIGNAL and SIGEV_THREAD_ID set, LWP ID of the
 312            thread to receive the signal.  */
 313         __pid_t _tid;
 314
 315         struct
 316           {
 317             void (*_function) (sigval_t);       /* Function to start.  */
 318             pthread_attr_t *_attribute;         /* Thread attributes.  */
 319           } _sigev_thread;
 320       } _sigev_un;
 321   } sigevent_t;
 322
 323 /* POSIX names to access some of the members.  */
 324 # define sigev_notify_function   _sigev_un._sigev_thread._function
 325 # define sigev_notify_attributes _sigev_un._sigev_thread._attribute
 326
 327 /* `sigev_notify' values.  */
 328 enum
 329 {
 330   SIGEV_SIGNAL = 0,             /* Notify via signal.  */
 331 # define SIGEV_SIGNAL   SIGEV_SIGNAL
 332   SIGEV_NONE,                   /* Other notification: meaningless.  */
 333 # define SIGEV_NONE     SIGEV_NONE
 334   SIGEV_THREAD,                 /* Deliver via thread creation.  */
 335 # define SIGEV_THREAD   SIGEV_THREAD
 336
 337   SIGEV_THREAD_ID = 4           /* Send signal to specific thread.  */
 338 #define SIGEV_THREAD_ID SIGEV_THREAD_ID
 339 };
 340
 341 #endif  /* have _SIGNAL_H.  */