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 */