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Linux/include/uapi/asm-generic/siginfo.h

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  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 NSIGSEGV        7
233 
234 /*
235  * SIGBUS si_codes
236  */
237 #define BUS_ADRALN      1       /* invalid address alignment */
238 #define BUS_ADRERR      2       /* non-existent physical address */
239 #define BUS_OBJERR      3       /* object specific hardware error */
240 /* hardware memory error consumed on a machine check: action required */
241 #define BUS_MCEERR_AR   4
242 /* hardware memory error detected in process but not consumed: action optional*/
243 #define BUS_MCEERR_AO   5
244 #define NSIGBUS         5
245 
246 /*
247  * SIGTRAP si_codes
248  */
249 #define TRAP_BRKPT      1       /* process breakpoint */
250 #define TRAP_TRACE      2       /* process trace trap */
251 #define TRAP_BRANCH     3       /* process taken branch trap */
252 #define TRAP_HWBKPT     4       /* hardware breakpoint/watchpoint */
253 #define TRAP_UNK        5       /* undiagnosed trap */
254 #define NSIGTRAP        5
255 
256 /*
257  * There is an additional set of SIGTRAP si_codes used by ptrace
258  * that are of the form: ((PTRACE_EVENT_XXX << 8) | SIGTRAP)
259  */
260 
261 /*
262  * SIGCHLD si_codes
263  */
264 #define CLD_EXITED      1       /* child has exited */
265 #define CLD_KILLED      2       /* child was killed */
266 #define CLD_DUMPED      3       /* child terminated abnormally */
267 #define CLD_TRAPPED     4       /* traced child has trapped */
268 #define CLD_STOPPED     5       /* child has stopped */
269 #define CLD_CONTINUED   6       /* stopped child has continued */
270 #define NSIGCHLD        6
271 
272 /*
273  * SIGPOLL (or any other signal without signal specific si_codes) si_codes
274  */
275 #define POLL_IN         1       /* data input available */
276 #define POLL_OUT        2       /* output buffers available */
277 #define POLL_MSG        3       /* input message available */
278 #define POLL_ERR        4       /* i/o error */
279 #define POLL_PRI        5       /* high priority input available */
280 #define POLL_HUP        6       /* device disconnected */
281 #define NSIGPOLL        6
282 
283 /*
284  * SIGSYS si_codes
285  */
286 #define SYS_SECCOMP     1       /* seccomp triggered */
287 #define NSIGSYS         1
288 
289 /*
290  * SIGEMT si_codes
291  */
292 #define EMT_TAGOVF      1       /* tag overflow */
293 #define NSIGEMT         1
294 
295 /*
296  * sigevent definitions
297  * 
298  * It seems likely that SIGEV_THREAD will have to be handled from 
299  * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
300  * thread manager then catches and does the appropriate nonsense.
301  * However, everything is written out here so as to not get lost.
302  */
303 #define SIGEV_SIGNAL    0       /* notify via signal */
304 #define SIGEV_NONE      1       /* other notification: meaningless */
305 #define SIGEV_THREAD    2       /* deliver via thread creation */
306 #define SIGEV_THREAD_ID 4       /* deliver to thread */
307 
308 /*
309  * This works because the alignment is ok on all current architectures
310  * but we leave open this being overridden in the future
311  */
312 #ifndef __ARCH_SIGEV_PREAMBLE_SIZE
313 #define __ARCH_SIGEV_PREAMBLE_SIZE      (sizeof(int) * 2 + sizeof(sigval_t))
314 #endif
315 
316 #define SIGEV_MAX_SIZE  64
317 #define SIGEV_PAD_SIZE  ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
318                 / sizeof(int))
319 
320 typedef struct sigevent {
321         sigval_t sigev_value;
322         int sigev_signo;
323         int sigev_notify;
324         union {
325                 int _pad[SIGEV_PAD_SIZE];
326                  int _tid;
327 
328                 struct {
329                         void (*_function)(sigval_t);
330                         void *_attribute;       /* really pthread_attr_t */
331                 } _sigev_thread;
332         } _sigev_un;
333 } sigevent_t;
334 
335 #define sigev_notify_function   _sigev_un._sigev_thread._function
336 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute
337 #define sigev_notify_thread_id   _sigev_un._tid
338 
339 
340 #endif /* _UAPI_ASM_GENERIC_SIGINFO_H */
341 

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