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 /*
  27  * The default "si_band" type is "long", as specified by POSIX.
  28  * However, some architectures want to override this to "int"
  29  * for historical compatibility reasons, so we allow that.
  30  */
  31 #ifndef __ARCH_SI_BAND_T
  32 #define __ARCH_SI_BAND_T long
  33 #endif
  34
  35 #ifndef __ARCH_SI_CLOCK_T
  36 #define __ARCH_SI_CLOCK_T __kernel_clock_t
  37 #endif
  38
  39 #ifndef __ARCH_SI_ATTRIBUTES
  40 #define __ARCH_SI_ATTRIBUTES
  41 #endif
  42
  43 typedef struct siginfo {
  44         int si_signo;
  45 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
  46         int si_errno;
  47         int si_code;
  48 #else
  49         int si_code;
  50         int si_errno;
  51 #endif
  52
  53         union {
  54                 int _pad[SI_PAD_SIZE];
  55
  56                 /* kill() */
  57                 struct {
  58                         __kernel_pid_t _pid;    /* sender's pid */
  59                         __kernel_uid32_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                         sigval_t _sigval;       /* same as below */
  67                         int _sys_private;       /* not to be passed to user */
  68                 } _timer;
  69
  70                 /* POSIX.1b signals */
  71                 struct {
  72                         __kernel_pid_t _pid;    /* sender's pid */
  73                         __kernel_uid32_t _uid;  /* sender's uid */
  74                         sigval_t _sigval;
  75                 } _rt;
  76
  77                 /* SIGCHLD */
  78                 struct {
  79                         __kernel_pid_t _pid;    /* which child */
  80                         __kernel_uid32_t _uid;  /* sender's uid */
  81                         int _status;            /* exit code */
  82                         __ARCH_SI_CLOCK_T _utime;
  83                         __ARCH_SI_CLOCK_T _stime;
  84                 } _sigchld;
  85
  86                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
  87                 struct {
  88                         void __user *_addr; /* faulting insn/memory ref. */
  89 #ifdef __ARCH_SI_TRAPNO
  90                         int _trapno;    /* TRAP # which caused the signal */
  91 #endif
  92 #ifdef __ia64__
  93                         int _imm;               /* immediate value for "break" */
  94                         unsigned int _flags;    /* see ia64 si_flags */
  95                         unsigned long _isr;     /* isr */
  96 #endif
  97                         union {
  98                                 /*
  99                                  * used when si_code=BUS_MCEERR_AR or
 100                                  * used when si_code=BUS_MCEERR_AO
 101                                  */
 102                                 short _addr_lsb; /* LSB of the reported address */
 103                                 /* used when si_code=SEGV_BNDERR */
 104                                 struct {
 105                                         void *_dummy_bnd;
 106                                         void __user *_lower;
 107                                         void __user *_upper;
 108                                 } _addr_bnd;
 109                                 /* used when si_code=SEGV_PKUERR */
 110                                 struct {
 111                                         void *_dummy_pkey;
 112                                         __u32 _pkey;
 113                                 } _addr_pkey;
 114                         };
 115                 } _sigfault;
 116
 117                 /* SIGPOLL */
 118                 struct {
 119                         __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
 120                         int _fd;
 121                 } _sigpoll;
 122
 123                 /* SIGSYS */
 124                 struct {
 125                         void __user *_call_addr; /* calling user insn */
 126                         int _syscall;   /* triggering system call number */
 127                         unsigned int _arch;     /* AUDIT_ARCH_* of syscall */
 128                 } _sigsys;
 129         } _sifields;
 130 } __ARCH_SI_ATTRIBUTES siginfo_t;
 131
 132 /*
 133  * How these fields are to be accessed.
 134  */
 135 #define si_pid          _sifields._kill._pid
 136 #define si_uid          _sifields._kill._uid
 137 #define si_tid          _sifields._timer._tid
 138 #define si_overrun      _sifields._timer._overrun
 139 #define si_sys_private  _sifields._timer._sys_private
 140 #define si_status       _sifields._sigchld._status
 141 #define si_utime        _sifields._sigchld._utime
 142 #define si_stime        _sifields._sigchld._stime
 143 #define si_value        _sifields._rt._sigval
 144 #define si_int          _sifields._rt._sigval.sival_int
 145 #define si_ptr          _sifields._rt._sigval.sival_ptr
 146 #define si_addr         _sifields._sigfault._addr
 147 #ifdef __ARCH_SI_TRAPNO
 148 #define si_trapno       _sifields._sigfault._trapno
 149 #endif
 150 #define si_addr_lsb     _sifields._sigfault._addr_lsb
 151 #define si_lower        _sifields._sigfault._addr_bnd._lower
 152 #define si_upper        _sifields._sigfault._addr_bnd._upper
 153 #define si_pkey         _sifields._sigfault._addr_pkey._pkey
 154 #define si_band         _sifields._sigpoll._band
 155 #define si_fd           _sifields._sigpoll._fd
 156 #define si_call_addr    _sifields._sigsys._call_addr
 157 #define si_syscall      _sifields._sigsys._syscall
 158 #define si_arch         _sifields._sigsys._arch
 159
 160 /*
 161  * si_code values
 162  * Digital reserves positive values for kernel-generated signals.
 163  */
 164 #define SI_USER         0               /* sent by kill, sigsend, raise */
 165 #define SI_KERNEL       0x80            /* sent by the kernel from somewhere */
 166 #define SI_QUEUE        -1              /* sent by sigqueue */
 167 #define SI_TIMER        -2              /* sent by timer expiration */
 168 #define SI_MESGQ        -3              /* sent by real time mesq state change */
 169 #define SI_ASYNCIO      -4              /* sent by AIO completion */
 170 #define SI_SIGIO        -5              /* sent by queued SIGIO */
 171 #define SI_TKILL        -6              /* sent by tkill system call */
 172 #define SI_DETHREAD     -7              /* sent by execve() killing subsidiary threads */
 173 #define SI_ASYNCNL      -60             /* sent by glibc async name lookup completion */
 174
 175 #define SI_FROMUSER(siptr)      ((siptr)->si_code <= 0)
 176 #define SI_FROMKERNEL(siptr)    ((siptr)->si_code > 0)
 177
 178 /*
 179  * SIGILL si_codes
 180  */
 181 #define ILL_ILLOPC      1       /* illegal opcode */
 182 #ifdef __bfin__
 183 # define ILL_ILLPARAOP  2       /* illegal opcode combine */
 184 #endif
 185 #define ILL_ILLOPN      2       /* illegal operand */
 186 #define ILL_ILLADR      3       /* illegal addressing mode */
 187 #define ILL_ILLTRP      4       /* illegal trap */
 188 #ifdef __bfin__
 189 # define ILL_ILLEXCPT   4       /* unrecoverable exception */
 190 #endif
 191 #define ILL_PRVOPC      5       /* privileged opcode */
 192 #define ILL_PRVREG      6       /* privileged register */
 193 #define ILL_COPROC      7       /* coprocessor error */
 194 #define ILL_BADSTK      8       /* internal stack error */
 195 #ifdef __bfin__
 196 # define ILL_CPLB_VI    9       /* D/I CPLB protect violation */
 197 # define ILL_CPLB_MISS  10      /* D/I CPLB miss */
 198 # define ILL_CPLB_MULHIT 11     /* D/I CPLB multiple hit */
 199 #endif
 200 #ifdef __tile__
 201 # define ILL_DBLFLT     9       /* double fault */
 202 # define ILL_HARDWALL   10      /* user networks hardwall violation */
 203 #endif
 204 #ifdef __ia64__
 205 # define ILL_BADIADDR   9       /* unimplemented instruction address */
 206 # define __ILL_BREAK    10      /* illegal break */
 207 # define __ILL_BNDMOD   11      /* bundle-update (modification) in progress */
 208 #endif
 209 #define NSIGILL         11
 210
 211 /*
 212  * SIGFPE si_codes
 213  */
 214 #define FPE_INTDIV      1       /* integer divide by zero */
 215 #define FPE_INTOVF      2       /* integer overflow */
 216 #define FPE_FLTDIV      3       /* floating point divide by zero */
 217 #define FPE_FLTOVF      4       /* floating point overflow */
 218 #define FPE_FLTUND      5       /* floating point underflow */
 219 #define FPE_FLTRES      6       /* floating point inexact result */
 220 #define FPE_FLTINV      7       /* floating point invalid operation */
 221 #define FPE_FLTSUB      8       /* subscript out of range */
 222 #ifdef __frv__
 223 # define FPE_MDAOVF     9       /* media overflow */
 224 #endif
 225 #ifdef __ia64__
 226 # define __FPE_DECOVF   9       /* decimal overflow */
 227 # define __FPE_DECDIV   10      /* decimal division by zero */
 228 # define __FPE_DECERR   11      /* packed decimal error */
 229 # define __FPE_INVASC   12      /* invalid ASCII digit */
 230 # define __FPE_INVDEC   13      /* invalid decimal digit */
 231 #endif
 232 #define NSIGFPE         13
 233
 234 /*
 235  * SIGSEGV si_codes
 236  */
 237 #define SEGV_MAPERR     1       /* address not mapped to object */
 238 #define SEGV_ACCERR     2       /* invalid permissions for mapped object */
 239 #ifdef __bfin__
 240 # define SEGV_STACKFLOW 3       /* stack overflow */
 241 #else
 242 # define SEGV_BNDERR    3       /* failed address bound checks */
 243 #endif
 244 #ifdef __ia64__
 245 # define __SEGV_PSTKOVF 4       /* paragraph stack overflow */
 246 #else
 247 # define SEGV_PKUERR    4       /* failed protection key checks */
 248 #endif
 249 #define NSIGSEGV        4
 250
 251 /*
 252  * SIGBUS si_codes
 253  */
 254 #define BUS_ADRALN      1       /* invalid address alignment */
 255 #define BUS_ADRERR      2       /* non-existent physical address */
 256 #define BUS_OBJERR      3       /* object specific hardware error */
 257 #ifdef __bfin__
 258 # define BUS_OPFETCH    4       /* error from instruction fetch */
 259 #else
 260 /* hardware memory error consumed on a machine check: action required */
 261 # define BUS_MCEERR_AR  4
 262 #endif
 263 /* hardware memory error detected in process but not consumed: action optional*/
 264 #define BUS_MCEERR_AO   5
 265 #define NSIGBUS         5
 266
 267 /*
 268  * SIGTRAP si_codes
 269  */
 270 #define TRAP_BRKPT      1       /* process breakpoint */
 271 #define TRAP_TRACE      2       /* process trace trap */
 272 #define TRAP_BRANCH     3       /* process taken branch trap */
 273 #define TRAP_HWBKPT     4       /* hardware breakpoint/watchpoint */
 274 #ifdef __bfin__
 275 # define TRAP_STEP      1       /* single-step breakpoint */
 276 # define TRAP_TRACEFLOW 2       /* trace buffer overflow */
 277 # define TRAP_WATCHPT   3       /* watchpoint match */
 278 # define TRAP_ILLTRAP   4       /* illegal trap */
 279 #endif
 280 #define NSIGTRAP        4
 281
 282 /*
 283  * There is an additional set of SIGTRAP si_codes used by ptrace
 284  * that are of the form: ((PTRACE_EVENT_XXX << 8) | SIGTRAP)
 285  */
 286
 287 /*
 288  * SIGCHLD si_codes
 289  */
 290 #define CLD_EXITED      1       /* child has exited */
 291 #define CLD_KILLED      2       /* child was killed */
 292 #define CLD_DUMPED      3       /* child terminated abnormally */
 293 #define CLD_TRAPPED     4       /* traced child has trapped */
 294 #define CLD_STOPPED     5       /* child has stopped */
 295 #define CLD_CONTINUED   6       /* stopped child has continued */
 296 #define NSIGCHLD        6
 297
 298 /*
 299  * SIGPOLL (or any other signal without signal specific si_codes) si_codes
 300  */
 301 #define POLL_IN         1       /* data input available */
 302 #define POLL_OUT        2       /* output buffers available */
 303 #define POLL_MSG        3       /* input message available */
 304 #define POLL_ERR        4       /* i/o error */
 305 #define POLL_PRI        5       /* high priority input available */
 306 #define POLL_HUP        6       /* device disconnected */
 307 #define NSIGPOLL        6
 308
 309 /*
 310  * SIGSYS si_codes
 311  */
 312 #define SYS_SECCOMP     1       /* seccomp triggered */
 313 #define NSIGSYS         1
 314
 315 /*
 316  * sigevent definitions
 317  *
 318  * It seems likely that SIGEV_THREAD will have to be handled from
 319  * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
 320  * thread manager then catches and does the appropriate nonsense.
 321  * However, everything is written out here so as to not get lost.
 322  */
 323 #define SIGEV_SIGNAL    0       /* notify via signal */
 324 #define SIGEV_NONE      1       /* other notification: meaningless */
 325 #define SIGEV_THREAD    2       /* deliver via thread creation */
 326 #define SIGEV_THREAD_ID 4       /* deliver to thread */
 327
 328 /*
 329  * This works because the alignment is ok on all current architectures
 330  * but we leave open this being overridden in the future
 331  */
 332 #ifndef __ARCH_SIGEV_PREAMBLE_SIZE
 333 #define __ARCH_SIGEV_PREAMBLE_SIZE      (sizeof(int) * 2 + sizeof(sigval_t))
 334 #endif
 335
 336 #define SIGEV_MAX_SIZE  64
 337 #define SIGEV_PAD_SIZE  ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
 338                 / sizeof(int))
 339
 340 typedef struct sigevent {
 341         sigval_t sigev_value;
 342         int sigev_signo;
 343         int sigev_notify;
 344         union {
 345                 int _pad[SIGEV_PAD_SIZE];
 346                  int _tid;
 347
 348                 struct {
 349                         void (*_function)(sigval_t);
 350                         void *_attribute;       /* really pthread_attr_t */
 351                 } _sigev_thread;
 352         } _sigev_un;
 353 } sigevent_t;
 354
 355 #define sigev_notify_function   _sigev_un._sigev_thread._function
 356 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute
 357 #define sigev_notify_thread_id   _sigev_un._tid
 358
 359
 360 #endif /* _UAPI_ASM_GENERIC_SIGINFO_H */