linux-headers (unknown)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _ASM_GENERIC_SIGINFO_H
3 #define _ASM_GENERIC_SIGINFO_H
4
5
6 #include <linux/types.h>
7
8 typedef union sigval {
9 int sival_int;
10 void *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 /*
33 * Be careful when extending this union. On 32bit siginfo_t is 32bit
34 * aligned. Which means that a 64bit field or any other field that
35 * would increase the alignment of siginfo_t will break the ABI.
36 */
37 union __sifields {
38 /* kill() */
39 struct {
40 __kernel_pid_t _pid; /* sender's pid */
41 __kernel_uid32_t _uid; /* sender's uid */
42 } _kill;
43
44 /* POSIX.1b timers */
45 struct {
46 __kernel_timer_t _tid; /* timer id */
47 int _overrun; /* overrun count */
48 sigval_t _sigval; /* same as below */
49 int _sys_private; /* not to be passed to user */
50 } _timer;
51
52 /* POSIX.1b signals */
53 struct {
54 __kernel_pid_t _pid; /* sender's pid */
55 __kernel_uid32_t _uid; /* sender's uid */
56 sigval_t _sigval;
57 } _rt;
58
59 /* SIGCHLD */
60 struct {
61 __kernel_pid_t _pid; /* which child */
62 __kernel_uid32_t _uid; /* sender's uid */
63 int _status; /* exit code */
64 __ARCH_SI_CLOCK_T _utime;
65 __ARCH_SI_CLOCK_T _stime;
66 } _sigchld;
67
68 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
69 struct {
70 void *_addr; /* faulting insn/memory ref. */
71 #ifdef __ia64__
72 int _imm; /* immediate value for "break" */
73 unsigned int _flags; /* see ia64 si_flags */
74 unsigned long _isr; /* isr */
75 #endif
76
77 #define __ADDR_BND_PKEY_PAD (__alignof__(void *) < sizeof(short) ? \
78 sizeof(short) : __alignof__(void *))
79 union {
80 /* used on alpha and sparc */
81 int _trapno; /* TRAP # which caused the signal */
82 /*
83 * used when si_code=BUS_MCEERR_AR or
84 * used when si_code=BUS_MCEERR_AO
85 */
86 short _addr_lsb; /* LSB of the reported address */
87 /* used when si_code=SEGV_BNDERR */
88 struct {
89 char _dummy_bnd[__ADDR_BND_PKEY_PAD];
90 void *_lower;
91 void *_upper;
92 } _addr_bnd;
93 /* used when si_code=SEGV_PKUERR */
94 struct {
95 char _dummy_pkey[__ADDR_BND_PKEY_PAD];
96 __u32 _pkey;
97 } _addr_pkey;
98 /* used when si_code=TRAP_PERF */
99 struct {
100 unsigned long _data;
101 __u32 _type;
102 __u32 _flags;
103 } _perf;
104 };
105 } _sigfault;
106
107 /* SIGPOLL */
108 struct {
109 __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
110 int _fd;
111 } _sigpoll;
112
113 /* SIGSYS */
114 struct {
115 void *_call_addr; /* calling user insn */
116 int _syscall; /* triggering system call number */
117 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
118 } _sigsys;
119 };
120
121 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
122 #define __SIGINFO \
123 struct { \
124 int si_signo; \
125 int si_errno; \
126 int si_code; \
127 union __sifields _sifields; \
128 }
129 #else
130 #define __SIGINFO \
131 struct { \
132 int si_signo; \
133 int si_code; \
134 int si_errno; \
135 union __sifields _sifields; \
136 }
137 #endif /* __ARCH_HAS_SWAPPED_SIGINFO */
138
139 typedef struct siginfo {
140 union {
141 __SIGINFO;
142 int _si_pad[SI_MAX_SIZE/sizeof(int)];
143 };
144 } __ARCH_SI_ATTRIBUTES siginfo_t;
145
146 /*
147 * How these fields are to be accessed.
148 */
149 #define si_pid _sifields._kill._pid
150 #define si_uid _sifields._kill._uid
151 #define si_tid _sifields._timer._tid
152 #define si_overrun _sifields._timer._overrun
153 #define si_sys_private _sifields._timer._sys_private
154 #define si_status _sifields._sigchld._status
155 #define si_utime _sifields._sigchld._utime
156 #define si_stime _sifields._sigchld._stime
157 #define si_value _sifields._rt._sigval
158 #define si_int _sifields._rt._sigval.sival_int
159 #define si_ptr _sifields._rt._sigval.sival_ptr
160 #define si_addr _sifields._sigfault._addr
161 #define si_trapno _sifields._sigfault._trapno
162 #define si_addr_lsb _sifields._sigfault._addr_lsb
163 #define si_lower _sifields._sigfault._addr_bnd._lower
164 #define si_upper _sifields._sigfault._addr_bnd._upper
165 #define si_pkey _sifields._sigfault._addr_pkey._pkey
166 #define si_perf_data _sifields._sigfault._perf._data
167 #define si_perf_type _sifields._sigfault._perf._type
168 #define si_perf_flags _sifields._sigfault._perf._flags
169 #define si_band _sifields._sigpoll._band
170 #define si_fd _sifields._sigpoll._fd
171 #define si_call_addr _sifields._sigsys._call_addr
172 #define si_syscall _sifields._sigsys._syscall
173 #define si_arch _sifields._sigsys._arch
174
175 /*
176 * si_code values
177 * Digital reserves positive values for kernel-generated signals.
178 */
179 #define SI_USER 0 /* sent by kill, sigsend, raise */
180 #define SI_KERNEL 0x80 /* sent by the kernel from somewhere */
181 #define SI_QUEUE -1 /* sent by sigqueue */
182 #define SI_TIMER -2 /* sent by timer expiration */
183 #define SI_MESGQ -3 /* sent by real time mesq state change */
184 #define SI_ASYNCIO -4 /* sent by AIO completion */
185 #define SI_SIGIO -5 /* sent by queued SIGIO */
186 #define SI_TKILL -6 /* sent by tkill system call */
187 #define SI_DETHREAD -7 /* sent by execve() killing subsidiary threads */
188 #define SI_ASYNCNL -60 /* sent by glibc async name lookup completion */
189
190 #define SI_FROMUSER(siptr) ((siptr)->si_code <= 0)
191 #define SI_FROMKERNEL(siptr) ((siptr)->si_code > 0)
192
193 /*
194 * SIGILL si_codes
195 */
196 #define ILL_ILLOPC 1 /* illegal opcode */
197 #define ILL_ILLOPN 2 /* illegal operand */
198 #define ILL_ILLADR 3 /* illegal addressing mode */
199 #define ILL_ILLTRP 4 /* illegal trap */
200 #define ILL_PRVOPC 5 /* privileged opcode */
201 #define ILL_PRVREG 6 /* privileged register */
202 #define ILL_COPROC 7 /* coprocessor error */
203 #define ILL_BADSTK 8 /* internal stack error */
204 #define ILL_BADIADDR 9 /* unimplemented instruction address */
205 #define __ILL_BREAK 10 /* illegal break */
206 #define __ILL_BNDMOD 11 /* bundle-update (modification) in progress */
207 #define NSIGILL 11
208
209 /*
210 * SIGFPE si_codes
211 */
212 #define FPE_INTDIV 1 /* integer divide by zero */
213 #define FPE_INTOVF 2 /* integer overflow */
214 #define FPE_FLTDIV 3 /* floating point divide by zero */
215 #define FPE_FLTOVF 4 /* floating point overflow */
216 #define FPE_FLTUND 5 /* floating point underflow */
217 #define FPE_FLTRES 6 /* floating point inexact result */
218 #define FPE_FLTINV 7 /* floating point invalid operation */
219 #define FPE_FLTSUB 8 /* subscript out of range */
220 #define __FPE_DECOVF 9 /* decimal overflow */
221 #define __FPE_DECDIV 10 /* decimal division by zero */
222 #define __FPE_DECERR 11 /* packed decimal error */
223 #define __FPE_INVASC 12 /* invalid ASCII digit */
224 #define __FPE_INVDEC 13 /* invalid decimal digit */
225 #define FPE_FLTUNK 14 /* undiagnosed floating-point exception */
226 #define FPE_CONDTRAP 15 /* trap on condition */
227 #define NSIGFPE 15
228
229 /*
230 * SIGSEGV si_codes
231 */
232 #define SEGV_MAPERR 1 /* address not mapped to object */
233 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */
234 #define SEGV_BNDERR 3 /* failed address bound checks */
235 #ifdef __ia64__
236 # define __SEGV_PSTKOVF 4 /* paragraph stack overflow */
237 #else
238 # define SEGV_PKUERR 4 /* failed protection key checks */
239 #endif
240 #define SEGV_ACCADI 5 /* ADI not enabled for mapped object */
241 #define SEGV_ADIDERR 6 /* Disrupting MCD error */
242 #define SEGV_ADIPERR 7 /* Precise MCD exception */
243 #define SEGV_MTEAERR 8 /* Asynchronous ARM MTE error */
244 #define SEGV_MTESERR 9 /* Synchronous ARM MTE exception */
245 #define NSIGSEGV 9
246
247 /*
248 * SIGBUS si_codes
249 */
250 #define BUS_ADRALN 1 /* invalid address alignment */
251 #define BUS_ADRERR 2 /* non-existent physical address */
252 #define BUS_OBJERR 3 /* object specific hardware error */
253 /* hardware memory error consumed on a machine check: action required */
254 #define BUS_MCEERR_AR 4
255 /* hardware memory error detected in process but not consumed: action optional*/
256 #define BUS_MCEERR_AO 5
257 #define NSIGBUS 5
258
259 /*
260 * SIGTRAP si_codes
261 */
262 #define TRAP_BRKPT 1 /* process breakpoint */
263 #define TRAP_TRACE 2 /* process trace trap */
264 #define TRAP_BRANCH 3 /* process taken branch trap */
265 #define TRAP_HWBKPT 4 /* hardware breakpoint/watchpoint */
266 #define TRAP_UNK 5 /* undiagnosed trap */
267 #define TRAP_PERF 6 /* perf event with sigtrap=1 */
268 #define NSIGTRAP 6
269
270 /*
271 * There is an additional set of SIGTRAP si_codes used by ptrace
272 * that are of the form: ((PTRACE_EVENT_XXX << 8) | SIGTRAP)
273 */
274
275 /*
276 * Flags for si_perf_flags if SIGTRAP si_code is TRAP_PERF.
277 */
278 #define TRAP_PERF_FLAG_ASYNC (1u << 0)
279
280 /*
281 * SIGCHLD si_codes
282 */
283 #define CLD_EXITED 1 /* child has exited */
284 #define CLD_KILLED 2 /* child was killed */
285 #define CLD_DUMPED 3 /* child terminated abnormally */
286 #define CLD_TRAPPED 4 /* traced child has trapped */
287 #define CLD_STOPPED 5 /* child has stopped */
288 #define CLD_CONTINUED 6 /* stopped child has continued */
289 #define NSIGCHLD 6
290
291 /*
292 * SIGPOLL (or any other signal without signal specific si_codes) si_codes
293 */
294 #define POLL_IN 1 /* data input available */
295 #define POLL_OUT 2 /* output buffers available */
296 #define POLL_MSG 3 /* input message available */
297 #define POLL_ERR 4 /* i/o error */
298 #define POLL_PRI 5 /* high priority input available */
299 #define POLL_HUP 6 /* device disconnected */
300 #define NSIGPOLL 6
301
302 /*
303 * SIGSYS si_codes
304 */
305 #define SYS_SECCOMP 1 /* seccomp triggered */
306 #define SYS_USER_DISPATCH 2 /* syscall user dispatch triggered */
307 #define NSIGSYS 2
308
309 /*
310 * SIGEMT si_codes
311 */
312 #define EMT_TAGOVF 1 /* tag overflow */
313 #define NSIGEMT 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 /* _ASM_GENERIC_SIGINFO_H */
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