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 #define SI_MAX_SIZE     128
  14
  15 /*
  16  * The default "si_band" type is "long", as specified by POSIX.
  17  * However, some architectures want to override this to "int"
  18  * for historical compatibility reasons, so we allow that.
  19  */
  20 #ifndef __ARCH_SI_BAND_T
  21 #define __ARCH_SI_BAND_T long
  22 #endif
  23
  24 #ifndef __ARCH_SI_CLOCK_T
  25 #define __ARCH_SI_CLOCK_T __kernel_clock_t
  26 #endif
  27
  28 #ifndef __ARCH_SI_ATTRIBUTES
  29 #define __ARCH_SI_ATTRIBUTES
  30 #endif
  31
  32 union __sifields {
  33         /* kill() */
  34         struct {
  35                 __kernel_pid_t _pid;    /* sender's pid */
  36                 __kernel_uid32_t _uid;  /* sender's uid */
  37         } _kill;
  38
  39         /* POSIX.1b timers */
  40         struct {
  41                 __kernel_timer_t _tid;  /* timer id */
  42                 int _overrun;           /* overrun count */
  43                 sigval_t _sigval;       /* same as below */
  44                 int _sys_private;       /* not to be passed to user */
  45         } _timer;
  46
  47         /* POSIX.1b signals */
  48         struct {
  49                 __kernel_pid_t _pid;    /* sender's pid */
  50                 __kernel_uid32_t _uid;  /* sender's uid */
  51                 sigval_t _sigval;
  52         } _rt;
  53
  54         /* SIGCHLD */
  55         struct {
  56                 __kernel_pid_t _pid;    /* which child */
  57                 __kernel_uid32_t _uid;  /* sender's uid */
  58                 int _status;            /* exit code */
  59                 __ARCH_SI_CLOCK_T _utime;
  60                 __ARCH_SI_CLOCK_T _stime;
  61         } _sigchld;
  62
  63         /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
  64         struct {
  65                 void __user *_addr; /* faulting insn/memory ref. */
  66 #ifdef __ARCH_SI_TRAPNO
  67                 int _trapno;    /* TRAP # which caused the signal */
  68 #endif
  69 #ifdef __ia64__
  70                 int _imm;               /* immediate value for "break" */
  71                 unsigned int _flags;    /* see ia64 si_flags */
  72                 unsigned long _isr;     /* isr */
  73 #endif
  74
  75 #define __ADDR_BND_PKEY_PAD  (__alignof__(void *) < sizeof(short) ? \
  76                               sizeof(short) : __alignof__(void *))
  77                 union {
  78                         /*
  79                          * used when si_code=BUS_MCEERR_AR or
  80                          * used when si_code=BUS_MCEERR_AO
  81                          */
  82                         short _addr_lsb; /* LSB of the reported address */
  83                         /* used when si_code=SEGV_BNDERR */
  84                         struct {
  85                                 char _dummy_bnd[__ADDR_BND_PKEY_PAD];
  86                                 void __user *_lower;
  87                                 void __user *_upper;
  88                         } _addr_bnd;
  89                         /* used when si_code=SEGV_PKUERR */
  90                         struct {
  91                                 char _dummy_pkey[__ADDR_BND_PKEY_PAD];
  92                                 __u32 _pkey;
  93                         } _addr_pkey;
  94                 };
  95         } _sigfault;
  96
  97         /* SIGPOLL */
  98         struct {
  99                 __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
 100                 int _fd;
 101         } _sigpoll;
 102
 103         /* SIGSYS */
 104         struct {
 105                 void __user *_call_addr; /* calling user insn */
 106                 int _syscall;   /* triggering system call number */
 107                 unsigned int _arch;     /* AUDIT_ARCH_* of syscall */
 108         } _sigsys;
 109 };
 110
 111 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
 112 #define __SIGINFO                       \
 113 struct {                                \
 114         int si_signo;                   \
 115         int si_errno;                   \
 116         int si_code;                    \
 117         union __sifields _sifields;     \
 118 }
 119 #else
 120 #define __SIGINFO                       \
 121 struct {                                \
 122         int si_signo;                   \
 123         int si_code;                    \
 124         int si_errno;                   \
 125         union __sifields _sifields;     \
 126 }
 127 #endif /* __ARCH_HAS_SWAPPED_SIGINFO */
 128
 129 typedef struct siginfo {
 130         union {
 131                 __SIGINFO;
 132                 int _si_pad[SI_MAX_SIZE/sizeof(int)];
 133         };
 134 } __ARCH_SI_ATTRIBUTES siginfo_t;
 135
 136 /*
 137  * How these fields are to be accessed.
 138  */
 139 #define si_pid          _sifields._kill._pid
 140 #define si_uid          _sifields._kill._uid
 141 #define si_tid          _sifields._timer._tid
 142 #define si_overrun      _sifields._timer._overrun
 143 #define si_sys_private  _sifields._timer._sys_private
 144 #define si_status       _sifields._sigchld._status
 145 #define si_utime        _sifields._sigchld._utime
 146 #define si_stime        _sifields._sigchld._stime
 147 #define si_value        _sifields._rt._sigval
 148 #define si_int          _sifields._rt._sigval.sival_int
 149 #define si_ptr          _sifields._rt._sigval.sival_ptr
 150 #define si_addr         _sifields._sigfault._addr
 151 #ifdef __ARCH_SI_TRAPNO
 152 #define si_trapno       _sifields._sigfault._trapno
 153 #endif
 154 #define si_addr_lsb     _sifields._sigfault._addr_lsb
 155 #define si_lower        _sifields._sigfault._addr_bnd._lower
 156 #define si_upper        _sifields._sigfault._addr_bnd._upper
 157 #define si_pkey         _sifields._sigfault._addr_pkey._pkey
 158 #define si_band         _sifields._sigpoll._band
 159 #define si_fd           _sifields._sigpoll._fd
 160 #define si_call_addr    _sifields._sigsys._call_addr
 161 #define si_syscall      _sifields._sigsys._syscall
 162 #define si_arch         _sifields._sigsys._arch
 163
 164 /*
 165  * si_code values
 166  * Digital reserves positive values for kernel-generated signals.
 167  */
 168 #define SI_USER         0               /* sent by kill, sigsend, raise */
 169 #define SI_KERNEL       0x80            /* sent by the kernel from somewhere */
 170 #define SI_QUEUE        -1              /* sent by sigqueue */
 171 #define SI_TIMER        -2              /* sent by timer expiration */
 172 #define SI_MESGQ        -3              /* sent by real time mesq state change */
 173 #define SI_ASYNCIO      -4              /* sent by AIO completion */
 174 #define SI_SIGIO        -5              /* sent by queued SIGIO */
 175 #define SI_TKILL        -6              /* sent by tkill system call */
 176 #define SI_DETHREAD     -7              /* sent by execve() killing subsidiary threads */
 177 #define SI_ASYNCNL      -60             /* sent by glibc async name lookup completion */
 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      1       /* illegal opcode */
 186 #define ILL_ILLOPN      2       /* illegal operand */
 187 #define ILL_ILLADR      3       /* illegal addressing mode */
 188 #define ILL_ILLTRP      4       /* illegal trap */
 189 #define ILL_PRVOPC      5       /* privileged opcode */
 190 #define ILL_PRVREG      6       /* privileged register */
 191 #define ILL_COPROC      7       /* coprocessor error */
 192 #define ILL_BADSTK      8       /* internal stack error */
 193 #define ILL_BADIADDR    9       /* unimplemented instruction address */
 194 #define __ILL_BREAK     10      /* illegal break */
 195 #define __ILL_BNDMOD    11      /* bundle-update (modification) in progress */
 196 #define NSIGILL         11
 197
 198 /*
 199  * SIGFPE si_codes
 200  */
 201 #define FPE_INTDIV      1       /* integer divide by zero */
 202 #define FPE_INTOVF      2       /* integer overflow */
 203 #define FPE_FLTDIV      3       /* floating point divide by zero */
 204 #define FPE_FLTOVF      4       /* floating point overflow */
 205 #define FPE_FLTUND      5       /* floating point underflow */
 206 #define FPE_FLTRES      6       /* floating point inexact result */
 207 #define FPE_FLTINV      7       /* floating point invalid operation */
 208 #define FPE_FLTSUB      8       /* subscript out of range */
 209 #define __FPE_DECOVF    9       /* decimal overflow */
 210 #define __FPE_DECDIV    10      /* decimal division by zero */
 211 #define __FPE_DECERR    11      /* packed decimal error */
 212 #define __FPE_INVASC    12      /* invalid ASCII digit */
 213 #define __FPE_INVDEC    13      /* invalid decimal digit */
 214 #define FPE_FLTUNK      14      /* undiagnosed floating-point exception */
 215 #define FPE_CONDTRAP    15      /* trap on condition */
 216 #define NSIGFPE         15
 217
 218 /*
 219  * SIGSEGV si_codes
 220  */
 221 #define SEGV_MAPERR     1       /* address not mapped to object */
 222 #define SEGV_ACCERR     2       /* invalid permissions for mapped object */
 223 #define SEGV_BNDERR     3       /* failed address bound checks */
 224 #ifdef __ia64__
 225 # define __SEGV_PSTKOVF 4       /* paragraph stack overflow */
 226 #else
 227 # define SEGV_PKUERR    4       /* failed protection key checks */
 228 #endif
 229 #define SEGV_ACCADI     5       /* ADI not enabled for mapped object */
 230 #define SEGV_ADIDERR    6       /* Disrupting MCD error */
 231 #define SEGV_ADIPERR    7       /* Precise MCD exception */
 232 #define SEGV_MTEAERR    8       /* Asynchronous ARM MTE error */
 233 #define SEGV_MTESERR    9       /* Synchronous ARM MTE exception */
 234 #define NSIGSEGV        9
 235
 236 /*
 237  * SIGBUS si_codes
 238  */
 239 #define BUS_ADRALN      1       /* invalid address alignment */
 240 #define BUS_ADRERR      2       /* non-existent physical address */
 241 #define BUS_OBJERR      3       /* object specific hardware error */
 242 /* hardware memory error consumed on a machine check: action required */
 243 #define BUS_MCEERR_AR   4
 244 /* hardware memory error detected in process but not consumed: action optional*/
 245 #define BUS_MCEERR_AO   5
 246 #define NSIGBUS         5
 247
 248 /*
 249  * SIGTRAP si_codes
 250  */
 251 #define TRAP_BRKPT      1       /* process breakpoint */
 252 #define TRAP_TRACE      2       /* process trace trap */
 253 #define TRAP_BRANCH     3       /* process taken branch trap */
 254 #define TRAP_HWBKPT     4       /* hardware breakpoint/watchpoint */
 255 #define TRAP_UNK        5       /* undiagnosed trap */
 256 #define NSIGTRAP        5
 257
 258 /*
 259  * There is an additional set of SIGTRAP si_codes used by ptrace
 260  * that are of the form: ((PTRACE_EVENT_XXX << 8) | SIGTRAP)
 261  */
 262
 263 /*
 264  * SIGCHLD si_codes
 265  */
 266 #define CLD_EXITED      1       /* child has exited */
 267 #define CLD_KILLED      2       /* child was killed */
 268 #define CLD_DUMPED      3       /* child terminated abnormally */
 269 #define CLD_TRAPPED     4       /* traced child has trapped */
 270 #define CLD_STOPPED     5       /* child has stopped */
 271 #define CLD_CONTINUED   6       /* stopped child has continued */
 272 #define NSIGCHLD        6
 273
 274 /*
 275  * SIGPOLL (or any other signal without signal specific si_codes) si_codes
 276  */
 277 #define POLL_IN         1       /* data input available */
 278 #define POLL_OUT        2       /* output buffers available */
 279 #define POLL_MSG        3       /* input message available */
 280 #define POLL_ERR        4       /* i/o error */
 281 #define POLL_PRI        5       /* high priority input available */
 282 #define POLL_HUP        6       /* device disconnected */
 283 #define NSIGPOLL        6
 284
 285 /*
 286  * SIGSYS si_codes
 287  */
 288 #define SYS_SECCOMP     1       /* seccomp triggered */
 289 #define SYS_USER_DISPATCH 2     /* syscall user dispatch triggered */
 290 #define NSIGSYS         2
 291
 292 /*
 293  * SIGEMT si_codes
 294  */
 295 #define EMT_TAGOVF      1       /* tag overflow */
 296 #define NSIGEMT         1
 297
 298 /*
 299  * sigevent definitions
 300  *
 301  * It seems likely that SIGEV_THREAD will have to be handled from
 302  * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
 303  * thread manager then catches and does the appropriate nonsense.
 304  * However, everything is written out here so as to not get lost.
 305  */
 306 #define SIGEV_SIGNAL    0       /* notify via signal */
 307 #define SIGEV_NONE      1       /* other notification: meaningless */
 308 #define SIGEV_THREAD    2       /* deliver via thread creation */
 309 #define SIGEV_THREAD_ID 4       /* deliver to thread */
 310
 311 /*
 312  * This works because the alignment is ok on all current architectures
 313  * but we leave open this being overridden in the future
 314  */
 315 #ifndef __ARCH_SIGEV_PREAMBLE_SIZE
 316 #define __ARCH_SIGEV_PREAMBLE_SIZE      (sizeof(int) * 2 + sizeof(sigval_t))
 317 #endif
 318
 319 #define SIGEV_MAX_SIZE  64
 320 #define SIGEV_PAD_SIZE  ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
 321                 / sizeof(int))
 322
 323 typedef struct sigevent {
 324         sigval_t sigev_value;
 325         int sigev_signo;
 326         int sigev_notify;
 327         union {
 328                 int _pad[SIGEV_PAD_SIZE];
 329                  int _tid;
 330
 331                 struct {
 332                         void (*_function)(sigval_t);
 333                         void *_attribute;       /* really pthread_attr_t */
 334                 } _sigev_thread;
 335         } _sigev_un;
 336 } sigevent_t;
 337
 338 #define sigev_notify_function   _sigev_un._sigev_thread._function
 339 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute
 340 #define sigev_notify_thread_id   _sigev_un._tid
 341
 342
 343 #endif /* _UAPI_ASM_GENERIC_SIGINFO_H */