linux/include/asm-generic/siginfo.h
<<
>>
Prefs
   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 __ARCH_SI_CLOCK_T
  39#define __ARCH_SI_CLOCK_T __kernel_clock_t
  40#endif
  41
  42#ifndef __ARCH_SI_ATTRIBUTES
  43#define __ARCH_SI_ATTRIBUTES
  44#endif
  45
  46#ifndef HAVE_ARCH_SIGINFO_T
  47
  48typedef struct siginfo {
  49        int si_signo;
  50        int si_errno;
  51        int si_code;
  52
  53        union {
  54                int _pad[SI_PAD_SIZE];
  55
  56                /* kill() */
  57                struct {
  58                        __kernel_pid_t _pid;    /* sender's pid */
  59                        __ARCH_SI_UID_T _uid;   /* sender's uid */
  60                } _kill;
  61
  62                /* POSIX.1b timers */
  63                struct {
  64                        __kernel_timer_t _tid;  /* timer id */
  65                        int _overrun;           /* overrun count */
  66                        char _pad[sizeof( __ARCH_SI_UID_T) - sizeof(int)];
  67                        sigval_t _sigval;       /* same as below */
  68                        int _sys_private;       /* not to be passed to user */
  69                } _timer;
  70
  71                /* POSIX.1b signals */
  72                struct {
  73                        __kernel_pid_t _pid;    /* sender's pid */
  74                        __ARCH_SI_UID_T _uid;   /* sender's uid */
  75                        sigval_t _sigval;
  76                } _rt;
  77
  78                /* SIGCHLD */
  79                struct {
  80                        __kernel_pid_t _pid;    /* which child */
  81                        __ARCH_SI_UID_T _uid;   /* sender's uid */
  82                        int _status;            /* exit code */
  83                        __ARCH_SI_CLOCK_T _utime;
  84                        __ARCH_SI_CLOCK_T _stime;
  85                } _sigchld;
  86
  87                /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
  88                struct {
  89                        void __user *_addr; /* faulting insn/memory ref. */
  90#ifdef __ARCH_SI_TRAPNO
  91                        int _trapno;    /* TRAP # which caused the signal */
  92#endif
  93                        short _addr_lsb; /* LSB of the reported address */
  94                } _sigfault;
  95
  96                /* SIGPOLL */
  97                struct {
  98                        __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
  99                        int _fd;
 100                } _sigpoll;
 101
 102                /* SIGSYS */
 103                struct {
 104                        void __user *_call_addr; /* calling user insn */
 105                        int _syscall;   /* triggering system call number */
 106                        unsigned int _arch;     /* AUDIT_ARCH_* of syscall */
 107                } _sigsys;
 108        } _sifields;
 109} __ARCH_SI_ATTRIBUTES siginfo_t;
 110
 111/* If the arch shares siginfo, then it has SIGSYS. */
 112#define __ARCH_SIGSYS
 113#endif
 114
 115/*
 116 * How these fields are to be accessed.
 117 */
 118#define si_pid          _sifields._kill._pid
 119#define si_uid          _sifields._kill._uid
 120#define si_tid          _sifields._timer._tid
 121#define si_overrun      _sifields._timer._overrun
 122#define si_sys_private  _sifields._timer._sys_private
 123#define si_status       _sifields._sigchld._status
 124#define si_utime        _sifields._sigchld._utime
 125#define si_stime        _sifields._sigchld._stime
 126#define si_value        _sifields._rt._sigval
 127#define si_int          _sifields._rt._sigval.sival_int
 128#define si_ptr          _sifields._rt._sigval.sival_ptr
 129#define si_addr         _sifields._sigfault._addr
 130#ifdef __ARCH_SI_TRAPNO
 131#define si_trapno       _sifields._sigfault._trapno
 132#endif
 133#define si_addr_lsb     _sifields._sigfault._addr_lsb
 134#define si_band         _sifields._sigpoll._band
 135#define si_fd           _sifields._sigpoll._fd
 136#ifdef __ARCH_SIGSYS
 137#define si_call_addr    _sifields._sigsys._call_addr
 138#define si_syscall      _sifields._sigsys._syscall
 139#define si_arch         _sifields._sigsys._arch
 140#endif
 141
 142#ifdef __KERNEL__
 143#define __SI_MASK       0xffff0000u
 144#define __SI_KILL       (0 << 16)
 145#define __SI_TIMER      (1 << 16)
 146#define __SI_POLL       (2 << 16)
 147#define __SI_FAULT      (3 << 16)
 148#define __SI_CHLD       (4 << 16)
 149#define __SI_RT         (5 << 16)
 150#define __SI_MESGQ      (6 << 16)
 151#define __SI_SYS        (7 << 16)
 152#define __SI_CODE(T,N)  ((T) | ((N) & 0xffff))
 153#else
 154#define __SI_KILL       0
 155#define __SI_TIMER      0
 156#define __SI_POLL       0
 157#define __SI_FAULT      0
 158#define __SI_CHLD       0
 159#define __SI_RT         0
 160#define __SI_MESGQ      0
 161#define __SI_SYS        0
 162#define __SI_CODE(T,N)  (N)
 163#endif
 164
 165/*
 166 * si_code values
 167 * Digital reserves positive values for kernel-generated signals.
 168 */
 169#define SI_USER         0               /* sent by kill, sigsend, raise */
 170#define SI_KERNEL       0x80            /* sent by the kernel from somewhere */
 171#define SI_QUEUE        -1              /* sent by sigqueue */
 172#define SI_TIMER __SI_CODE(__SI_TIMER,-2) /* sent by timer expiration */
 173#define SI_MESGQ __SI_CODE(__SI_MESGQ,-3) /* sent by real time mesq state change */
 174#define SI_ASYNCIO      -4              /* sent by AIO completion */
 175#define SI_SIGIO        -5              /* sent by queued SIGIO */
 176#define SI_TKILL        -6              /* sent by tkill system call */
 177#define SI_DETHREAD     -7              /* sent by execve() killing subsidiary threads */
 178
 179#define SI_FROMUSER(siptr)      ((siptr)->si_code <= 0)
 180#define SI_FROMKERNEL(siptr)    ((siptr)->si_code > 0)
 181
 182/*
 183 * SIGILL si_codes
 184 */
 185#define ILL_ILLOPC      (__SI_FAULT|1)  /* illegal opcode */
 186#define ILL_ILLOPN      (__SI_FAULT|2)  /* illegal operand */
 187#define ILL_ILLADR      (__SI_FAULT|3)  /* illegal addressing mode */
 188#define ILL_ILLTRP      (__SI_FAULT|4)  /* illegal trap */
 189#define ILL_PRVOPC      (__SI_FAULT|5)  /* privileged opcode */
 190#define ILL_PRVREG      (__SI_FAULT|6)  /* privileged register */
 191#define ILL_COPROC      (__SI_FAULT|7)  /* coprocessor error */
 192#define ILL_BADSTK      (__SI_FAULT|8)  /* internal stack error */
 193#define NSIGILL         8
 194
 195/*
 196 * SIGFPE si_codes
 197 */
 198#define FPE_INTDIV      (__SI_FAULT|1)  /* integer divide by zero */
 199#define FPE_INTOVF      (__SI_FAULT|2)  /* integer overflow */
 200#define FPE_FLTDIV      (__SI_FAULT|3)  /* floating point divide by zero */
 201#define FPE_FLTOVF      (__SI_FAULT|4)  /* floating point overflow */
 202#define FPE_FLTUND      (__SI_FAULT|5)  /* floating point underflow */
 203#define FPE_FLTRES      (__SI_FAULT|6)  /* floating point inexact result */
 204#define FPE_FLTINV      (__SI_FAULT|7)  /* floating point invalid operation */
 205#define FPE_FLTSUB      (__SI_FAULT|8)  /* subscript out of range */
 206#define NSIGFPE         8
 207
 208/*
 209 * SIGSEGV si_codes
 210 */
 211#define SEGV_MAPERR     (__SI_FAULT|1)  /* address not mapped to object */
 212#define SEGV_ACCERR     (__SI_FAULT|2)  /* invalid permissions for mapped object */
 213#define NSIGSEGV        2
 214
 215/*
 216 * SIGBUS si_codes
 217 */
 218#define BUS_ADRALN      (__SI_FAULT|1)  /* invalid address alignment */
 219#define BUS_ADRERR      (__SI_FAULT|2)  /* non-existent physical address */
 220#define BUS_OBJERR      (__SI_FAULT|3)  /* object specific hardware error */
 221/* hardware memory error consumed on a machine check: action required */
 222#define BUS_MCEERR_AR   (__SI_FAULT|4)
 223/* hardware memory error detected in process but not consumed: action optional*/
 224#define BUS_MCEERR_AO   (__SI_FAULT|5)
 225#define NSIGBUS         5
 226
 227/*
 228 * SIGTRAP si_codes
 229 */
 230#define TRAP_BRKPT      (__SI_FAULT|1)  /* process breakpoint */
 231#define TRAP_TRACE      (__SI_FAULT|2)  /* process trace trap */
 232#define TRAP_BRANCH     (__SI_FAULT|3)  /* process taken branch trap */
 233#define TRAP_HWBKPT     (__SI_FAULT|4)  /* hardware breakpoint/watchpoint */
 234#define NSIGTRAP        4
 235
 236/*
 237 * SIGCHLD si_codes
 238 */
 239#define CLD_EXITED      (__SI_CHLD|1)   /* child has exited */
 240#define CLD_KILLED      (__SI_CHLD|2)   /* child was killed */
 241#define CLD_DUMPED      (__SI_CHLD|3)   /* child terminated abnormally */
 242#define CLD_TRAPPED     (__SI_CHLD|4)   /* traced child has trapped */
 243#define CLD_STOPPED     (__SI_CHLD|5)   /* child has stopped */
 244#define CLD_CONTINUED   (__SI_CHLD|6)   /* stopped child has continued */
 245#define NSIGCHLD        6
 246
 247/*
 248 * SIGPOLL si_codes
 249 */
 250#define POLL_IN         (__SI_POLL|1)   /* data input available */
 251#define POLL_OUT        (__SI_POLL|2)   /* output buffers available */
 252#define POLL_MSG        (__SI_POLL|3)   /* input message available */
 253#define POLL_ERR        (__SI_POLL|4)   /* i/o error */
 254#define POLL_PRI        (__SI_POLL|5)   /* high priority input available */
 255#define POLL_HUP        (__SI_POLL|6)   /* device disconnected */
 256#define NSIGPOLL        6
 257
 258/*
 259 * SIGSYS si_codes
 260 */
 261#define SYS_SECCOMP             (__SI_SYS|1)    /* seccomp triggered */
 262#define NSIGSYS 1
 263
 264/*
 265 * sigevent definitions
 266 * 
 267 * It seems likely that SIGEV_THREAD will have to be handled from 
 268 * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
 269 * thread manager then catches and does the appropriate nonsense.
 270 * However, everything is written out here so as to not get lost.
 271 */
 272#define SIGEV_SIGNAL    0       /* notify via signal */
 273#define SIGEV_NONE      1       /* other notification: meaningless */
 274#define SIGEV_THREAD    2       /* deliver via thread creation */
 275#define SIGEV_THREAD_ID 4       /* deliver to thread */
 276
 277/*
 278 * This works because the alignment is ok on all current architectures
 279 * but we leave open this being overridden in the future
 280 */
 281#ifndef __ARCH_SIGEV_PREAMBLE_SIZE
 282#define __ARCH_SIGEV_PREAMBLE_SIZE      (sizeof(int) * 2 + sizeof(sigval_t))
 283#endif
 284
 285#define SIGEV_MAX_SIZE  64
 286#define SIGEV_PAD_SIZE  ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
 287                / sizeof(int))
 288
 289typedef struct sigevent {
 290        sigval_t sigev_value;
 291        int sigev_signo;
 292        int sigev_notify;
 293        union {
 294                int _pad[SIGEV_PAD_SIZE];
 295                 int _tid;
 296
 297                struct {
 298                        void (*_function)(sigval_t);
 299                        void *_attribute;       /* really pthread_attr_t */
 300                } _sigev_thread;
 301        } _sigev_un;
 302} sigevent_t;
 303
 304#define sigev_notify_function   _sigev_un._sigev_thread._function
 305#define sigev_notify_attributes _sigev_un._sigev_thread._attribute
 306#define sigev_notify_thread_id   _sigev_un._tid
 307
 308#ifdef __KERNEL__
 309
 310struct siginfo;
 311void do_schedule_next_timer(struct siginfo *info);
 312
 313#ifndef HAVE_ARCH_COPY_SIGINFO
 314
 315#include <linux/string.h>
 316
 317static inline void copy_siginfo(struct siginfo *to, struct siginfo *from)
 318{
 319        if (from->si_code < 0)
 320                memcpy(to, from, sizeof(*to));
 321        else
 322                /* _sigchld is currently the largest know union member */
 323                memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld));
 324}
 325
 326#endif
 327
 328extern int copy_siginfo_to_user(struct siginfo __user *to, struct siginfo *from);
 329
 330#endif /* __KERNEL__ */
 331
 332#endif
 333
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.