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
   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                 } _sigfault;
  86
  87                 /* SIGPOLL */
  88                 struct {
  89                         __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
  90                         int _fd;
  91                 } _sigpoll;
  92         } _sifields;
  93 } siginfo_t;
  94
  95 #endif
  96
  97 /*
  98  * How these fields are to be accessed.
  99  */
 100 #define si_pid          _sifields._kill._pid
 101 #define si_uid          _sifields._kill._uid
 102 #define si_tid          _sifields._timer._tid
 103 #define si_overrun      _sifields._timer._overrun
 104 #define si_sys_private  _sifields._timer._sys_private
 105 #define si_status       _sifields._sigchld._status
 106 #define si_utime        _sifields._sigchld._utime
 107 #define si_stime        _sifields._sigchld._stime
 108 #define si_value        _sifields._rt._sigval
 109 #define si_int          _sifields._rt._sigval.sival_int
 110 #define si_ptr          _sifields._rt._sigval.sival_ptr
 111 #define si_addr         _sifields._sigfault._addr
 112 #ifdef __ARCH_SI_TRAPNO
 113 #define si_trapno       _sifields._sigfault._trapno
 114 #endif
 115 #define si_band         _sifields._sigpoll._band
 116 #define si_fd           _sifields._sigpoll._fd
 117
 118 #ifdef __KERNEL__
 119 #define __SI_MASK       0xffff0000u
 120 #define __SI_KILL       (0 << 16)
 121 #define __SI_TIMER      (1 << 16)
 122 #define __SI_POLL       (2 << 16)
 123 #define __SI_FAULT      (3 << 16)
 124 #define __SI_CHLD       (4 << 16)
 125 #define __SI_RT         (5 << 16)
 126 #define __SI_MESGQ      (6 << 16)
 127 #define __SI_CODE(T,N)  ((T) | ((N) & 0xffff))
 128 #else
 129 #define __SI_KILL       0
 130 #define __SI_TIMER      0
 131 #define __SI_POLL       0
 132 #define __SI_FAULT      0
 133 #define __SI_CHLD       0
 134 #define __SI_RT         0
 135 #define __SI_MESGQ      0
 136 #define __SI_CODE(T,N)  (N)
 137 #endif
 138
 139 /*
 140  * si_code values
 141  * Digital reserves positive values for kernel-generated signals.
 142  */
 143 #define SI_USER         0               /* sent by kill, sigsend, raise */
 144 #define SI_KERNEL       0x80            /* sent by the kernel from somewhere */
 145 #define SI_QUEUE        -1              /* sent by sigqueue */
 146 #define SI_TIMER __SI_CODE(__SI_TIMER,-2) /* sent by timer expiration */
 147 #define SI_MESGQ __SI_CODE(__SI_MESGQ,-3) /* sent by real time mesq state change */
 148 #define SI_ASYNCIO      -4              /* sent by AIO completion */
 149 #define SI_SIGIO        -5              /* sent by queued SIGIO */
 150 #define SI_TKILL        -6              /* sent by tkill system call */
 151 #define SI_DETHREAD     -7              /* sent by execve() killing subsidiary threads */
 152
 153 #define SI_FROMUSER(siptr)      ((siptr)->si_code <= 0)
 154 #define SI_FROMKERNEL(siptr)    ((siptr)->si_code > 0)
 155
 156 /*
 157  * SIGILL si_codes
 158  */
 159 #define ILL_ILLOPC      (__SI_FAULT|1)  /* illegal opcode */
 160 #define ILL_ILLOPN      (__SI_FAULT|2)  /* illegal operand */
 161 #define ILL_ILLADR      (__SI_FAULT|3)  /* illegal addressing mode */
 162 #define ILL_ILLTRP      (__SI_FAULT|4)  /* illegal trap */
 163 #define ILL_PRVOPC      (__SI_FAULT|5)  /* privileged opcode */
 164 #define ILL_PRVREG      (__SI_FAULT|6)  /* privileged register */
 165 #define ILL_COPROC      (__SI_FAULT|7)  /* coprocessor error */
 166 #define ILL_BADSTK      (__SI_FAULT|8)  /* internal stack error */
 167 #define NSIGILL         8
 168
 169 /*
 170  * SIGFPE si_codes
 171  */
 172 #define FPE_INTDIV      (__SI_FAULT|1)  /* integer divide by zero */
 173 #define FPE_INTOVF      (__SI_FAULT|2)  /* integer overflow */
 174 #define FPE_FLTDIV      (__SI_FAULT|3)  /* floating point divide by zero */
 175 #define FPE_FLTOVF      (__SI_FAULT|4)  /* floating point overflow */
 176 #define FPE_FLTUND      (__SI_FAULT|5)  /* floating point underflow */
 177 #define FPE_FLTRES      (__SI_FAULT|6)  /* floating point inexact result */
 178 #define FPE_FLTINV      (__SI_FAULT|7)  /* floating point invalid operation */
 179 #define FPE_FLTSUB      (__SI_FAULT|8)  /* subscript out of range */
 180 #define NSIGFPE         8
 181
 182 /*
 183  * SIGSEGV si_codes
 184  */
 185 #define SEGV_MAPERR     (__SI_FAULT|1)  /* address not mapped to object */
 186 #define SEGV_ACCERR     (__SI_FAULT|2)  /* invalid permissions for mapped object */
 187 #define NSIGSEGV        2
 188
 189 /*
 190  * SIGBUS si_codes
 191  */
 192 #define BUS_ADRALN      (__SI_FAULT|1)  /* invalid address alignment */
 193 #define BUS_ADRERR      (__SI_FAULT|2)  /* non-existant physical address */
 194 #define BUS_OBJERR      (__SI_FAULT|3)  /* object specific hardware error */
 195 #define NSIGBUS         3
 196
 197 /*
 198  * SIGTRAP si_codes
 199  */
 200 #define TRAP_BRKPT      (__SI_FAULT|1)  /* process breakpoint */
 201 #define TRAP_TRACE      (__SI_FAULT|2)  /* process trace trap */
 202 #define TRAP_BRANCH     (__SI_FAULT|3)  /* process taken branch trap */
 203 #define TRAP_HWBKPT     (__SI_FAULT|4)  /* hardware breakpoint/watchpoint */
 204 #define NSIGTRAP        4
 205
 206 /*
 207  * SIGCHLD si_codes
 208  */
 209 #define CLD_EXITED      (__SI_CHLD|1)   /* child has exited */
 210 #define CLD_KILLED      (__SI_CHLD|2)   /* child was killed */
 211 #define CLD_DUMPED      (__SI_CHLD|3)   /* child terminated abnormally */
 212 #define CLD_TRAPPED     (__SI_CHLD|4)   /* traced child has trapped */
 213 #define CLD_STOPPED     (__SI_CHLD|5)   /* child has stopped */
 214 #define CLD_CONTINUED   (__SI_CHLD|6)   /* stopped child has continued */
 215 #define NSIGCHLD        6
 216
 217 /*
 218  * SIGPOLL si_codes
 219  */
 220 #define POLL_IN         (__SI_POLL|1)   /* data input available */
 221 #define POLL_OUT        (__SI_POLL|2)   /* output buffers available */
 222 #define POLL_MSG        (__SI_POLL|3)   /* input message available */
 223 #define POLL_ERR        (__SI_POLL|4)   /* i/o error */
 224 #define POLL_PRI        (__SI_POLL|5)   /* high priority input available */
 225 #define POLL_HUP        (__SI_POLL|6)   /* device disconnected */
 226 #define NSIGPOLL        6
 227
 228 /*
 229  * sigevent definitions
 230  *
 231  * It seems likely that SIGEV_THREAD will have to be handled from
 232  * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
 233  * thread manager then catches and does the appropriate nonsense.
 234  * However, everything is written out here so as to not get lost.
 235  */
 236 #define SIGEV_SIGNAL    0       /* notify via signal */
 237 #define SIGEV_NONE      1       /* other notification: meaningless */
 238 #define SIGEV_THREAD    2       /* deliver via thread creation */
 239 #define SIGEV_THREAD_ID 4       /* deliver to thread */
 240
 241 /*
 242  * This works because the alignment is ok on all current architectures
 243  * but we leave open this being overridden in the future
 244  */
 245 #ifndef __ARCH_SIGEV_PREAMBLE_SIZE
 246 #define __ARCH_SIGEV_PREAMBLE_SIZE      (sizeof(int) * 2 + sizeof(sigval_t))
 247 #endif
 248
 249 #define SIGEV_MAX_SIZE  64
 250 #define SIGEV_PAD_SIZE  ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
 251                 / sizeof(int))
 252
 253 typedef struct sigevent {
 254         sigval_t sigev_value;
 255         int sigev_signo;
 256         int sigev_notify;
 257         union {
 258                 int _pad[SIGEV_PAD_SIZE];
 259                  int _tid;
 260
 261                 struct {
 262                         void (*_function)(sigval_t);
 263                         void *_attribute;       /* really pthread_attr_t */
 264                 } _sigev_thread;
 265         } _sigev_un;
 266 } sigevent_t;
 267
 268 #define sigev_notify_function   _sigev_un._sigev_thread._function
 269 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute
 270 #define sigev_notify_thread_id   _sigev_un._tid
 271
 272 #ifdef __KERNEL__
 273
 274 struct siginfo;
 275 void do_schedule_next_timer(struct siginfo *info);
 276
 277 #ifndef HAVE_ARCH_COPY_SIGINFO
 278
 279 #include <linux/string.h>
 280
 281 static inline void copy_siginfo(struct siginfo *to, struct siginfo *from)
 282 {
 283         if (from->si_code < 0)
 284                 memcpy(to, from, sizeof(*to));
 285         else
 286                 /* _sigchld is currently the largest know union member */
 287                 memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld));
 288 }
 289
 290 #endif
 291
 292 extern int copy_siginfo_to_user(struct siginfo __user *to, struct siginfo *from);
 293
 294 #endif /* __KERNEL__ */
 295
 296 #endif