LXR linux/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