include/uapi/asm-generic/siginfo.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 #ifndef _UAPI_ASM_GENERIC_SIGINFO_H
   3 #define _UAPI_ASM_GENERIC_SIGINFO_H
   4
   5 #include <linux/compiler.h>
   6 #include <linux/types.h>
   7
   8 typedef union sigval {
   9         int sival_int;
  10         void __user *sival_ptr;
  11 } sigval_t;
  12
  13 /*
  14  * This is the size (including padding) of the part of the
  15  * struct siginfo that is before the union.
  16  */
  17 #ifndef __ARCH_SI_PREAMBLE_SIZE
  18 #define __ARCH_SI_PREAMBLE_SIZE (3 * sizeof(int))
  19 #endif
  20
  21 #define SI_MAX_SIZE     128
  22 #ifndef SI_PAD_SIZE
  23 #define SI_PAD_SIZE     ((SI_MAX_SIZE - __ARCH_SI_PREAMBLE_SIZE) / sizeof(int))
  24 #endif
  25
  26 #ifndef __ARCH_SI_UID_T
  27 #define __ARCH_SI_UID_T __kernel_uid32_t
  28 #endif
  29
  30 /*
  31  * The default "si_band" type is "long", as specified by POSIX.
  32  * However, some architectures want to override this to "int"
  33  * for historical compatibility reasons, so we allow that.
  34  */
  35 #ifndef __ARCH_SI_BAND_T
  36 #define __ARCH_SI_BAND_T long
  37 #endif
  38
  39 #ifndef __ARCH_SI_CLOCK_T
  40 #define __ARCH_SI_CLOCK_T __kernel_clock_t
  41 #endif
  42
  43 #ifndef __ARCH_SI_ATTRIBUTES
  44 #define __ARCH_SI_ATTRIBUTES
  45 #endif
  46
  47 #ifndef HAVE_ARCH_SIGINFO_T
  48
  49 typedef struct siginfo {
  50         int si_signo;
  51         int si_errno;
  52         int si_code;
  53
  54         union {
  55                 int _pad[SI_PAD_SIZE];
  56
  57                 /* kill() */
  58                 struct {
  59                         __kernel_pid_t _pid;    /* sender's pid */
  60                         __ARCH_SI_UID_T _uid;   /* sender's uid */
  61                 } _kill;
  62
  63                 /* POSIX.1b timers */
  64                 struct {
  65                         __kernel_timer_t _tid;  /* timer id */
  66                         int _overrun;           /* overrun count */
  67                         char _pad[sizeof( __ARCH_SI_UID_T) - sizeof(int)];
  68                         sigval_t _sigval;       /* same as below */
  69                         int _sys_private;       /* not to be passed to user */
  70                 } _timer;
  71
  72                 /* POSIX.1b signals */
  73                 struct {
  74                         __kernel_pid_t _pid;    /* sender's pid */
  75                         __ARCH_SI_UID_T _uid;   /* sender's uid */
  76                         sigval_t _sigval;
  77                 } _rt;
  78
  79                 /* SIGCHLD */
  80                 struct {
  81                         __kernel_pid_t _pid;    /* which child */
  82                         __ARCH_SI_UID_T _uid;   /* sender's uid */
  83                         int _status;            /* exit code */
  84                         __ARCH_SI_CLOCK_T _utime;
  85                         __ARCH_SI_CLOCK_T _stime;
  86                 } _sigchld;
  87
  88                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
  89                 struct {
  90                         void __user *_addr; /* faulting insn/memory ref. */
  91 #ifdef __ARCH_SI_TRAPNO
  92                         int _trapno;    /* TRAP # which caused the signal */
  93 #endif
  94                         short _addr_lsb; /* LSB of the reported address */
  95                         union {
  96                                 /* used when si_code=SEGV_BNDERR */
  97                                 struct {
  98                                         void __user *_lower;
  99                                         void __user *_upper;
 100                                 } _addr_bnd;
 101                                 /* used when si_code=SEGV_PKUERR */
 102                                 __u32 _pkey;
 103                         };
 104                 } _sigfault;
 105
 106                 /* SIGPOLL */
 107                 struct {
 108                         __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
 109                         int _fd;
 110                 } _sigpoll;
 111
 112                 /* SIGSYS */
 113                 struct {
 114                         void __user *_call_addr; /* calling user insn */
 115                         int _syscall;   /* triggering system call number */
 116                         unsigned int _arch;     /* AUDIT_ARCH_* of syscall */
 117                 } _sigsys;
 118         } _sifields;
 119 } __ARCH_SI_ATTRIBUTES siginfo_t;
 120
 121 /* If the arch shares siginfo, then it has SIGSYS. */
 122 #define __ARCH_SIGSYS
 123 #endif
 124
 125 /*
 126  * How these fields are to be accessed.
 127  */
 128 #define si_pid          _sifields._kill._pid
 129 #define si_uid          _sifields._kill._uid
 130 #define si_tid          _sifields._timer._tid
 131 #define si_overrun      _sifields._timer._overrun
 132 #define si_sys_private  _sifields._timer._sys_private
 133 #define si_status       _sifields._sigchld._status
 134 #define si_utime        _sifields._sigchld._utime
 135 #define si_stime        _sifields._sigchld._stime
 136 #define si_value        _sifields._rt._sigval
 137 #define si_int          _sifields._rt._sigval.sival_int
 138 #define si_ptr          _sifields._rt._sigval.sival_ptr
 139 #define si_addr         _sifields._sigfault._addr
 140 #ifdef __ARCH_SI_TRAPNO
 141 #define si_trapno       _sifields._sigfault._trapno
 142 #endif
 143 #define si_addr_lsb     _sifields._sigfault._addr_lsb
 144 #define si_lower        _sifields._sigfault._addr_bnd._lower
 145 #define si_upper        _sifields._sigfault._addr_bnd._upper
 146 #define si_pkey         _sifields._sigfault._pkey
 147 #define si_band         _sifields._sigpoll._band
 148 #define si_fd           _sifields._sigpoll._fd
 149 #ifdef __ARCH_SIGSYS
 150 #define si_call_addr    _sifields._sigsys._call_addr
 151 #define si_syscall      _sifields._sigsys._syscall
 152 #define si_arch         _sifields._sigsys._arch
 153 #endif
 154
 155 /*
 156  * si_code values
 157  * Digital reserves positive values for kernel-generated signals.
 158  */
 159 #define SI_USER         0               /* sent by kill, sigsend, raise */
 160 #define SI_KERNEL       0x80            /* sent by the kernel from somewhere */
 161 #define SI_QUEUE        -1              /* sent by sigqueue */
 162 #define SI_TIMER        -2              /* sent by timer expiration */
 163 #define SI_MESGQ        -3              /* sent by real time mesq state change */
 164 #define SI_ASYNCIO      -4              /* sent by AIO completion */
 165 #define SI_SIGIO        -5              /* sent by queued SIGIO */
 166 #define SI_TKILL        -6              /* sent by tkill system call */
 167 #define SI_DETHREAD     -7              /* sent by execve() killing subsidiary threads */
 168
 169 #define SI_FROMUSER(siptr)      ((siptr)->si_code <= 0)
 170 #define SI_FROMKERNEL(siptr)    ((siptr)->si_code > 0)
 171
 172 /*
 173  * SIGILL si_codes
 174  */
 175 #define ILL_ILLOPC      1       /* illegal opcode */
 176 #define ILL_ILLOPN      2       /* illegal operand */
 177 #define ILL_ILLADR      3       /* illegal addressing mode */
 178 #define ILL_ILLTRP      4       /* illegal trap */
 179 #define ILL_PRVOPC      5       /* privileged opcode */
 180 #define ILL_PRVREG      6       /* privileged register */
 181 #define ILL_COPROC      7       /* coprocessor error */
 182 #define ILL_BADSTK      8       /* internal stack error */
 183 #define NSIGILL         8
 184
 185 /*
 186  * SIGFPE si_codes
 187  */
 188 #define FPE_INTDIV      1       /* integer divide by zero */
 189 #define FPE_INTOVF      2       /* integer overflow */
 190 #define FPE_FLTDIV      3       /* floating point divide by zero */
 191 #define FPE_FLTOVF      4       /* floating point overflow */
 192 #define FPE_FLTUND      5       /* floating point underflow */
 193 #define FPE_FLTRES      6       /* floating point inexact result */
 194 #define FPE_FLTINV      7       /* floating point invalid operation */
 195 #define FPE_FLTSUB      8       /* subscript out of range */
 196 #define NSIGFPE         8
 197
 198 /*
 199  * SIGSEGV si_codes
 200  */
 201 #define SEGV_MAPERR     1       /* address not mapped to object */
 202 #define SEGV_ACCERR     2       /* invalid permissions for mapped object */
 203 #define SEGV_BNDERR     3       /* failed address bound checks */
 204 #define SEGV_PKUERR     4       /* failed protection key checks */
 205 #define NSIGSEGV        4
 206
 207 /*
 208  * SIGBUS si_codes
 209  */
 210 #define BUS_ADRALN      1       /* invalid address alignment */
 211 #define BUS_ADRERR      2       /* non-existent physical address */
 212 #define BUS_OBJERR      3       /* object specific hardware error */
 213 /* hardware memory error consumed on a machine check: action required */
 214 #define BUS_MCEERR_AR   4
 215 /* hardware memory error detected in process but not consumed: action optional*/
 216 #define BUS_MCEERR_AO   5
 217 #define NSIGBUS         5
 218
 219 /*
 220  * SIGTRAP si_codes
 221  */
 222 #define TRAP_BRKPT      1       /* process breakpoint */
 223 #define TRAP_TRACE      2       /* process trace trap */
 224 #define TRAP_BRANCH     3       /* process taken branch trap */
 225 #define TRAP_HWBKPT     4       /* hardware breakpoint/watchpoint */
 226 #define NSIGTRAP        4
 227
 228 /*
 229  * SIGCHLD si_codes
 230  */
 231 #define CLD_EXITED      1       /* child has exited */
 232 #define CLD_KILLED      2       /* child was killed */
 233 #define CLD_DUMPED      3       /* child terminated abnormally */
 234 #define CLD_TRAPPED     4       /* traced child has trapped */
 235 #define CLD_STOPPED     5       /* child has stopped */
 236 #define CLD_CONTINUED   6       /* stopped child has continued */
 237 #define NSIGCHLD        6
 238
 239 /*
 240  * SIGPOLL (or any other signal without signal specific si_codes) si_codes
 241  */
 242 #define POLL_IN         1       /* data input available */
 243 #define POLL_OUT        2       /* output buffers available */
 244 #define POLL_MSG        3       /* input message available */
 245 #define POLL_ERR        4       /* i/o error */
 246 #define POLL_PRI        5       /* high priority input available */
 247 #define POLL_HUP        6       /* device disconnected */
 248 #define NSIGPOLL        6
 249
 250 /*
 251  * SIGSYS si_codes
 252  */
 253 #define SYS_SECCOMP     1       /* seccomp triggered */
 254 #define NSIGSYS         1
 255
 256 /*
 257  * sigevent definitions
 258  *
 259  * It seems likely that SIGEV_THREAD will have to be handled from
 260  * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
 261  * thread manager then catches and does the appropriate nonsense.
 262  * However, everything is written out here so as to not get lost.
 263  */
 264 #define SIGEV_SIGNAL    0       /* notify via signal */
 265 #define SIGEV_NONE      1       /* other notification: meaningless */
 266 #define SIGEV_THREAD    2       /* deliver via thread creation */
 267 #define SIGEV_THREAD_ID 4       /* deliver to thread */
 268
 269 /*
 270  * This works because the alignment is ok on all current architectures
 271  * but we leave open this being overridden in the future
 272  */
 273 #ifndef __ARCH_SIGEV_PREAMBLE_SIZE
 274 #define __ARCH_SIGEV_PREAMBLE_SIZE      (sizeof(int) * 2 + sizeof(sigval_t))
 275 #endif
 276
 277 #define SIGEV_MAX_SIZE  64
 278 #define SIGEV_PAD_SIZE  ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
 279                 / sizeof(int))
 280
 281 typedef struct sigevent {
 282         sigval_t sigev_value;
 283         int sigev_signo;
 284         int sigev_notify;
 285         union {
 286                 int _pad[SIGEV_PAD_SIZE];
 287                  int _tid;
 288
 289                 struct {
 290                         void (*_function)(sigval_t);
 291                         void *_attribute;       /* really pthread_attr_t */
 292                 } _sigev_thread;
 293         } _sigev_un;
 294 } sigevent_t;
 295
 296 #define sigev_notify_function   _sigev_un._sigev_thread._function
 297 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute
 298 #define sigev_notify_thread_id   _sigev_un._tid
 299
 300
 301 #endif /* _UAPI_ASM_GENERIC_SIGINFO_H */