LCOV - code coverage report
Current view: top level - lkbce/include/asm-generic - siginfo.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 4 4 100.0 %
Date: 2017-01-25 Functions: 0 0 -

          Line data    Source code
       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           1 : } sigval_t;
      11           8 : 
      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             :                         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           1 : } 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             : 
     259             : typedef 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             : 
     280             : struct siginfo;
     281             : void do_schedule_next_timer(struct siginfo *info);
     282             : 
     283             : #ifndef HAVE_ARCH_COPY_SIGINFO
     284             : 
     285             : #include <linux/string.h>
     286             : 
     287             : static 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             : 
     298             : extern int copy_siginfo_to_user(struct siginfo __user *to, struct siginfo *from);
     299           1 : 
     300             : #endif /* __KERNEL__ */
     301             : 
     302             : #endif

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