xref: /linux/include/uapi/asm-generic/siginfo.h (revision 0ea5c948cb64bab5bc7a5516774eb8536f05aa0d)
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 /*
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 __user *_addr; /* faulting insn/memory ref. */
71 
72 #define __ADDR_BND_PKEY_PAD  (__alignof__(void *) < sizeof(short) ? \
73 			      sizeof(short) : __alignof__(void *))
74 		union {
75 			/* used on alpha and sparc */
76 			int _trapno;	/* TRAP # which caused the signal */
77 			/*
78 			 * used when si_code=BUS_MCEERR_AR or
79 			 * used when si_code=BUS_MCEERR_AO
80 			 */
81 			short _addr_lsb; /* LSB of the reported address */
82 			/* used when si_code=SEGV_BNDERR */
83 			struct {
84 				char _dummy_bnd[__ADDR_BND_PKEY_PAD];
85 				void __user *_lower;
86 				void __user *_upper;
87 			} _addr_bnd;
88 			/* used when si_code=SEGV_PKUERR */
89 			struct {
90 				char _dummy_pkey[__ADDR_BND_PKEY_PAD];
91 				__u32 _pkey;
92 			} _addr_pkey;
93 			/* used when si_code=TRAP_PERF */
94 			struct {
95 				unsigned long _data;
96 				__u32 _type;
97 				__u32 _flags;
98 			} _perf;
99 		};
100 	} _sigfault;
101 
102 	/* SIGPOLL */
103 	struct {
104 		__ARCH_SI_BAND_T _band;	/* POLL_IN, POLL_OUT, POLL_MSG */
105 		int _fd;
106 	} _sigpoll;
107 
108 	/* SIGSYS */
109 	struct {
110 		void __user *_call_addr; /* calling user insn */
111 		int _syscall;	/* triggering system call number */
112 		unsigned int _arch;	/* AUDIT_ARCH_* of syscall */
113 	} _sigsys;
114 };
115 
116 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
117 #define __SIGINFO 			\
118 struct {				\
119 	int si_signo;			\
120 	int si_errno;			\
121 	int si_code;			\
122 	union __sifields _sifields;	\
123 }
124 #else
125 #define __SIGINFO 			\
126 struct {				\
127 	int si_signo;			\
128 	int si_code;			\
129 	int si_errno;			\
130 	union __sifields _sifields;	\
131 }
132 #endif /* __ARCH_HAS_SWAPPED_SIGINFO */
133 
134 typedef struct siginfo {
135 	union {
136 		__SIGINFO;
137 		int _si_pad[SI_MAX_SIZE/sizeof(int)];
138 	};
139 } __ARCH_SI_ATTRIBUTES siginfo_t;
140 
141 /*
142  * How these fields are to be accessed.
143  */
144 #define si_pid		_sifields._kill._pid
145 #define si_uid		_sifields._kill._uid
146 #define si_tid		_sifields._timer._tid
147 #define si_overrun	_sifields._timer._overrun
148 #define si_sys_private  _sifields._timer._sys_private
149 #define si_status	_sifields._sigchld._status
150 #define si_utime	_sifields._sigchld._utime
151 #define si_stime	_sifields._sigchld._stime
152 #define si_value	_sifields._rt._sigval
153 #define si_int		_sifields._rt._sigval.sival_int
154 #define si_ptr		_sifields._rt._sigval.sival_ptr
155 #define si_addr		_sifields._sigfault._addr
156 #define si_trapno	_sifields._sigfault._trapno
157 #define si_addr_lsb	_sifields._sigfault._addr_lsb
158 #define si_lower	_sifields._sigfault._addr_bnd._lower
159 #define si_upper	_sifields._sigfault._addr_bnd._upper
160 #define si_pkey		_sifields._sigfault._addr_pkey._pkey
161 #define si_perf_data	_sifields._sigfault._perf._data
162 #define si_perf_type	_sifields._sigfault._perf._type
163 #define si_perf_flags	_sifields._sigfault._perf._flags
164 #define si_band		_sifields._sigpoll._band
165 #define si_fd		_sifields._sigpoll._fd
166 #define si_call_addr	_sifields._sigsys._call_addr
167 #define si_syscall	_sifields._sigsys._syscall
168 #define si_arch		_sifields._sigsys._arch
169 
170 /*
171  * si_code values
172  * Digital reserves positive values for kernel-generated signals.
173  */
174 #define SI_USER		0		/* sent by kill, sigsend, raise */
175 #define SI_KERNEL	0x80		/* sent by the kernel from somewhere */
176 #define SI_QUEUE	-1		/* sent by sigqueue */
177 #define SI_TIMER	-2		/* sent by timer expiration */
178 #define SI_MESGQ	-3		/* sent by real time mesq state change */
179 #define SI_ASYNCIO	-4		/* sent by AIO completion */
180 #define SI_SIGIO	-5		/* sent by queued SIGIO */
181 #define SI_TKILL	-6		/* sent by tkill system call */
182 #define SI_DETHREAD	-7		/* sent by execve() killing subsidiary threads */
183 #define SI_ASYNCNL	-60		/* sent by glibc async name lookup completion */
184 
185 #define SI_FROMUSER(siptr)	((siptr)->si_code <= 0)
186 #define SI_FROMKERNEL(siptr)	((siptr)->si_code > 0)
187 
188 /*
189  * SIGILL si_codes
190  */
191 #define ILL_ILLOPC	1	/* illegal opcode */
192 #define ILL_ILLOPN	2	/* illegal operand */
193 #define ILL_ILLADR	3	/* illegal addressing mode */
194 #define ILL_ILLTRP	4	/* illegal trap */
195 #define ILL_PRVOPC	5	/* privileged opcode */
196 #define ILL_PRVREG	6	/* privileged register */
197 #define ILL_COPROC	7	/* coprocessor error */
198 #define ILL_BADSTK	8	/* internal stack error */
199 #define ILL_BADIADDR	9	/* unimplemented instruction address */
200 #define __ILL_BREAK	10	/* illegal break */
201 #define __ILL_BNDMOD	11	/* bundle-update (modification) in progress */
202 #define NSIGILL		11
203 
204 /*
205  * SIGFPE si_codes
206  */
207 #define FPE_INTDIV	1	/* integer divide by zero */
208 #define FPE_INTOVF	2	/* integer overflow */
209 #define FPE_FLTDIV	3	/* floating point divide by zero */
210 #define FPE_FLTOVF	4	/* floating point overflow */
211 #define FPE_FLTUND	5	/* floating point underflow */
212 #define FPE_FLTRES	6	/* floating point inexact result */
213 #define FPE_FLTINV	7	/* floating point invalid operation */
214 #define FPE_FLTSUB	8	/* subscript out of range */
215 #define __FPE_DECOVF	9	/* decimal overflow */
216 #define __FPE_DECDIV	10	/* decimal division by zero */
217 #define __FPE_DECERR	11	/* packed decimal error */
218 #define __FPE_INVASC	12	/* invalid ASCII digit */
219 #define __FPE_INVDEC	13	/* invalid decimal digit */
220 #define FPE_FLTUNK	14	/* undiagnosed floating-point exception */
221 #define FPE_CONDTRAP	15	/* trap on condition */
222 #define NSIGFPE		15
223 
224 /*
225  * SIGSEGV si_codes
226  */
227 #define SEGV_MAPERR	1	/* address not mapped to object */
228 #define SEGV_ACCERR	2	/* invalid permissions for mapped object */
229 #define SEGV_BNDERR	3	/* failed address bound checks */
230 #ifdef __ia64__
231 # define __SEGV_PSTKOVF	4	/* paragraph stack overflow */
232 #else
233 # define SEGV_PKUERR	4	/* failed protection key checks */
234 #endif
235 #define SEGV_ACCADI	5	/* ADI not enabled for mapped object */
236 #define SEGV_ADIDERR	6	/* Disrupting MCD error */
237 #define SEGV_ADIPERR	7	/* Precise MCD exception */
238 #define SEGV_MTEAERR	8	/* Asynchronous ARM MTE error */
239 #define SEGV_MTESERR	9	/* Synchronous ARM MTE exception */
240 #define SEGV_CPERR	10	/* Control protection fault */
241 #define NSIGSEGV	10
242 
243 /*
244  * SIGBUS si_codes
245  */
246 #define BUS_ADRALN	1	/* invalid address alignment */
247 #define BUS_ADRERR	2	/* non-existent physical address */
248 #define BUS_OBJERR	3	/* object specific hardware error */
249 /* hardware memory error consumed on a machine check: action required */
250 #define BUS_MCEERR_AR	4
251 /* hardware memory error detected in process but not consumed: action optional*/
252 #define BUS_MCEERR_AO	5
253 #define NSIGBUS		5
254 
255 /*
256  * SIGTRAP si_codes
257  */
258 #define TRAP_BRKPT	1	/* process breakpoint */
259 #define TRAP_TRACE	2	/* process trace trap */
260 #define TRAP_BRANCH     3	/* process taken branch trap */
261 #define TRAP_HWBKPT     4	/* hardware breakpoint/watchpoint */
262 #define TRAP_UNK	5	/* undiagnosed trap */
263 #define TRAP_PERF	6	/* perf event with sigtrap=1 */
264 #define NSIGTRAP	6
265 
266 /*
267  * There is an additional set of SIGTRAP si_codes used by ptrace
268  * that are of the form: ((PTRACE_EVENT_XXX << 8) | SIGTRAP)
269  */
270 
271 /*
272  * Flags for si_perf_flags if SIGTRAP si_code is TRAP_PERF.
273  */
274 #define TRAP_PERF_FLAG_ASYNC (1u << 0)
275 
276 /*
277  * SIGCHLD si_codes
278  */
279 #define CLD_EXITED	1	/* child has exited */
280 #define CLD_KILLED	2	/* child was killed */
281 #define CLD_DUMPED	3	/* child terminated abnormally */
282 #define CLD_TRAPPED	4	/* traced child has trapped */
283 #define CLD_STOPPED	5	/* child has stopped */
284 #define CLD_CONTINUED	6	/* stopped child has continued */
285 #define NSIGCHLD	6
286 
287 /*
288  * SIGPOLL (or any other signal without signal specific si_codes) si_codes
289  */
290 #define POLL_IN		1	/* data input available */
291 #define POLL_OUT	2	/* output buffers available */
292 #define POLL_MSG	3	/* input message available */
293 #define POLL_ERR	4	/* i/o error */
294 #define POLL_PRI	5	/* high priority input available */
295 #define POLL_HUP	6	/* device disconnected */
296 #define NSIGPOLL	6
297 
298 /*
299  * SIGSYS si_codes
300  */
301 #define SYS_SECCOMP	1	/* seccomp triggered */
302 #define SYS_USER_DISPATCH 2	/* syscall user dispatch triggered */
303 #define NSIGSYS		2
304 
305 /*
306  * SIGEMT si_codes
307  */
308 #define EMT_TAGOVF	1	/* tag overflow */
309 #define NSIGEMT		1
310 
311 /*
312  * sigevent definitions
313  *
314  * It seems likely that SIGEV_THREAD will have to be handled from
315  * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
316  * thread manager then catches and does the appropriate nonsense.
317  * However, everything is written out here so as to not get lost.
318  */
319 #define SIGEV_SIGNAL	0	/* notify via signal */
320 #define SIGEV_NONE	1	/* other notification: meaningless */
321 #define SIGEV_THREAD	2	/* deliver via thread creation */
322 #define SIGEV_THREAD_ID 4	/* deliver to thread */
323 
324 /*
325  * This works because the alignment is ok on all current architectures
326  * but we leave open this being overridden in the future
327  */
328 #ifndef __ARCH_SIGEV_PREAMBLE_SIZE
329 #define __ARCH_SIGEV_PREAMBLE_SIZE	(sizeof(int) * 2 + sizeof(sigval_t))
330 #endif
331 
332 #define SIGEV_MAX_SIZE	64
333 #define SIGEV_PAD_SIZE	((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
334 		/ sizeof(int))
335 
336 typedef struct sigevent {
337 	sigval_t sigev_value;
338 	int sigev_signo;
339 	int sigev_notify;
340 	union {
341 		int _pad[SIGEV_PAD_SIZE];
342 		 int _tid;
343 
344 		struct {
345 			void (*_function)(sigval_t);
346 			void *_attribute;	/* really pthread_attr_t */
347 		} _sigev_thread;
348 	} _sigev_un;
349 } sigevent_t;
350 
351 #define sigev_notify_function	_sigev_un._sigev_thread._function
352 #define sigev_notify_attributes	_sigev_un._sigev_thread._attribute
353 #define sigev_notify_thread_id	 _sigev_un._tid
354 
355 
356 #endif /* _UAPI_ASM_GENERIC_SIGINFO_H */
357