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 __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
  48 typedef 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
 289 typedef 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
 310 struct siginfo;
 311 void do_schedule_next_timer(struct siginfo *info);
 312
 313 #ifndef HAVE_ARCH_COPY_SIGINFO
 314
 315 #include <linux/string.h>
 316
 317 static 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
 328 extern int copy_siginfo_to_user(struct siginfo __user *to, struct siginfo *from);
 329
 330 #endif /* __KERNEL__ */
 331
 332 #endif