summaryrefslogtreecommitdiff
path: root/include/uapi/asm-generic/siginfo.h
blob: 99c902e460c2534609c6c385543e527adc36fa57 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_ASM_GENERIC_SIGINFO_H
#define _UAPI_ASM_GENERIC_SIGINFO_H

#include <linux/compiler.h>
#include <linux/types.h>

typedef union sigval {
	int sival_int;
	void __user *sival_ptr;
} sigval_t;

/*
 * This is the size (including padding) of the part of the
 * struct siginfo that is before the union.
 */
#ifndef __ARCH_SI_PREAMBLE_SIZE
#define __ARCH_SI_PREAMBLE_SIZE	(3 * sizeof(int))
#endif

#define SI_MAX_SIZE	128
#ifndef SI_PAD_SIZE
#define SI_PAD_SIZE	((SI_MAX_SIZE - __ARCH_SI_PREAMBLE_SIZE) / sizeof(int))
#endif

/*
 * The default "si_band" type is "long", as specified by POSIX.
 * However, some architectures want to override this to "int"
 * for historical compatibility reasons, so we allow that.
 */
#ifndef __ARCH_SI_BAND_T
#define __ARCH_SI_BAND_T long
#endif

#ifndef __ARCH_SI_CLOCK_T
#define __ARCH_SI_CLOCK_T __kernel_clock_t
#endif

#ifndef __ARCH_SI_ATTRIBUTES
#define __ARCH_SI_ATTRIBUTES
#endif

typedef struct siginfo {
	int si_signo;
#ifndef __ARCH_HAS_SWAPPED_SIGINFO
	int si_errno;
	int si_code;
#else
	int si_code;
	int si_errno;
#endif

	union {
		int _pad[SI_PAD_SIZE];

		/* kill() */
		struct {
			__kernel_pid_t _pid;	/* sender's pid */
			__kernel_uid32_t _uid;	/* sender's uid */
		} _kill;

		/* POSIX.1b timers */
		struct {
			__kernel_timer_t _tid;	/* timer id */
			int _overrun;		/* overrun count */
			sigval_t _sigval;	/* same as below */
			int _sys_private;       /* not to be passed to user */
		} _timer;

		/* POSIX.1b signals */
		struct {
			__kernel_pid_t _pid;	/* sender's pid */
			__kernel_uid32_t _uid;	/* sender's uid */
			sigval_t _sigval;
		} _rt;

		/* SIGCHLD */
		struct {
			__kernel_pid_t _pid;	/* which child */
			__kernel_uid32_t _uid;	/* sender's uid */
			int _status;		/* exit code */
			__ARCH_SI_CLOCK_T _utime;
			__ARCH_SI_CLOCK_T _stime;
		} _sigchld;

		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
		struct {
			void __user *_addr; /* faulting insn/memory ref. */
#ifdef __ARCH_SI_TRAPNO
			int _trapno;	/* TRAP # which caused the signal */
#endif
#ifdef __ia64__
			int _imm;		/* immediate value for "break" */
			unsigned int _flags;	/* see ia64 si_flags */
			unsigned long _isr;	/* isr */
#endif
			union {
				/*
				 * used when si_code=BUS_MCEERR_AR or
				 * used when si_code=BUS_MCEERR_AO
				 */
				short _addr_lsb; /* LSB of the reported address */
				/* used when si_code=SEGV_BNDERR */
				struct {
					void *_dummy_bnd;
					void __user *_lower;
					void __user *_upper;
				} _addr_bnd;
				/* used when si_code=SEGV_PKUERR */
				struct {
					void *_dummy_pkey;
					__u32 _pkey;
				} _addr_pkey;
			};
		} _sigfault;

		/* SIGPOLL */
		struct {
			__ARCH_SI_BAND_T _band;	/* POLL_IN, POLL_OUT, POLL_MSG */
			int _fd;
		} _sigpoll;

		/* SIGSYS */
		struct {
			void __user *_call_addr; /* calling user insn */
			int _syscall;	/* triggering system call number */
			unsigned int _arch;	/* AUDIT_ARCH_* of syscall */
		} _sigsys;
	} _sifields;
} __ARCH_SI_ATTRIBUTES siginfo_t;

/*
 * How these fields are to be accessed.
 */
#define si_pid		_sifields._kill._pid
#define si_uid		_sifields._kill._uid
#define si_tid		_sifields._timer._tid
#define si_overrun	_sifields._timer._overrun
#define si_sys_private  _sifields._timer._sys_private
#define si_status	_sifields._sigchld._status
#define si_utime	_sifields._sigchld._utime
#define si_stime	_sifields._sigchld._stime
#define si_value	_sifields._rt._sigval
#define si_int		_sifields._rt._sigval.sival_int
#define si_ptr		_sifields._rt._sigval.sival_ptr
#define si_addr		_sifields._sigfault._addr
#ifdef __ARCH_SI_TRAPNO
#define si_trapno	_sifields._sigfault._trapno
#endif
#define si_addr_lsb	_sifields._sigfault._addr_lsb
#define si_lower	_sifields._sigfault._addr_bnd._lower
#define si_upper	_sifields._sigfault._addr_bnd._upper
#define si_pkey		_sifields._sigfault._addr_pkey._pkey
#define si_band		_sifields._sigpoll._band
#define si_fd		_sifields._sigpoll._fd
#define si_call_addr	_sifields._sigsys._call_addr
#define si_syscall	_sifields._sigsys._syscall
#define si_arch		_sifields._sigsys._arch

/*
 * si_code values
 * Digital reserves positive values for kernel-generated signals.
 */
#define SI_USER		0		/* sent by kill, sigsend, raise */
#define SI_KERNEL	0x80		/* sent by the kernel from somewhere */
#define SI_QUEUE	-1		/* sent by sigqueue */
#define SI_TIMER	-2		/* sent by timer expiration */
#define SI_MESGQ	-3		/* sent by real time mesq state change */
#define SI_ASYNCIO	-4		/* sent by AIO completion */
#define SI_SIGIO	-5		/* sent by queued SIGIO */
#define SI_TKILL	-6		/* sent by tkill system call */
#define SI_DETHREAD	-7		/* sent by execve() killing subsidiary threads */
#define SI_ASYNCNL	-60		/* sent by glibc async name lookup completion */

#define SI_FROMUSER(siptr)	((siptr)->si_code <= 0)
#define SI_FROMKERNEL(siptr)	((siptr)->si_code > 0)

/*
 * SIGILL si_codes
 */
#define ILL_ILLOPC	1	/* illegal opcode */
#ifdef __bfin__
# define ILL_ILLPARAOP	2	/* illegal opcode combine */
#endif
#define ILL_ILLOPN	2	/* illegal operand */
#define ILL_ILLADR	3	/* illegal addressing mode */
#define ILL_ILLTRP	4	/* illegal trap */
#ifdef __bfin__
# define ILL_ILLEXCPT	4	/* unrecoverable exception */
#endif
#define ILL_PRVOPC	5	/* privileged opcode */
#define ILL_PRVREG	6	/* privileged register */
#define ILL_COPROC	7	/* coprocessor error */
#define ILL_BADSTK	8	/* internal stack error */
#ifdef __bfin__
# define ILL_CPLB_VI	9	/* D/I CPLB protect violation */
# define ILL_CPLB_MISS	10	/* D/I CPLB miss */
# define ILL_CPLB_MULHIT 11	/* D/I CPLB multiple hit */
#endif
#ifdef __tile__
# define ILL_DBLFLT	9	/* double fault */
# define ILL_HARDWALL	10	/* user networks hardwall violation */
#endif
#ifdef __ia64__
# define ILL_BADIADDR	9	/* unimplemented instruction address */
# define __ILL_BREAK	10	/* illegal break */
# define __ILL_BNDMOD	11	/* bundle-update (modification) in progress */
#endif
#define NSIGILL		11

/*
 * SIGFPE si_codes
 */
#define FPE_INTDIV	1	/* integer divide by zero */
#define FPE_INTOVF	2	/* integer overflow */
#define FPE_FLTDIV	3	/* floating point divide by zero */
#define FPE_FLTOVF	4	/* floating point overflow */
#define FPE_FLTUND	5	/* floating point underflow */
#define FPE_FLTRES	6	/* floating point inexact result */
#define FPE_FLTINV	7	/* floating point invalid operation */
#define FPE_FLTSUB	8	/* subscript out of range */
#ifdef __frv__
# define FPE_MDAOVF	9	/* media overflow */
#endif
#ifdef __ia64__
# define __FPE_DECOVF	9	/* decimal overflow */
# define __FPE_DECDIV	10	/* decimal division by zero */
# define __FPE_DECERR	11	/* packed decimal error */
# define __FPE_INVASC	12	/* invalid ASCII digit */
# define __FPE_INVDEC	13	/* invalid decimal digit */
#endif
#define NSIGFPE		13

/*
 * SIGSEGV si_codes
 */
#define SEGV_MAPERR	1	/* address not mapped to object */
#define SEGV_ACCERR	2	/* invalid permissions for mapped object */
#ifdef __bfin__
# define SEGV_STACKFLOW	3	/* stack overflow */
#else
# define SEGV_BNDERR	3	/* failed address bound checks */
#endif
#ifdef __ia64__
# define __SEGV_PSTKOVF	4	/* paragraph stack overflow */
#else
# define SEGV_PKUERR	4	/* failed protection key checks */
#endif
#define NSIGSEGV	4

/*
 * SIGBUS si_codes
 */
#define BUS_ADRALN	1	/* invalid address alignment */
#define BUS_ADRERR	2	/* non-existent physical address */
#define BUS_OBJERR	3	/* object specific hardware error */
#ifdef __bfin__
# define BUS_OPFETCH	4	/* error from instruction fetch */
#else
/* hardware memory error consumed on a machine check: action required */
# define BUS_MCEERR_AR	4
#endif
/* hardware memory error detected in process but not consumed: action optional*/
#define BUS_MCEERR_AO	5
#define NSIGBUS		5

/*
 * SIGTRAP si_codes
 */
#define TRAP_BRKPT	1	/* process breakpoint */
#define TRAP_TRACE	2	/* process trace trap */
#define TRAP_BRANCH     3	/* process taken branch trap */
#define TRAP_HWBKPT     4	/* hardware breakpoint/watchpoint */
#ifdef __bfin__
# define TRAP_STEP	1	/* single-step breakpoint */
# define TRAP_TRACEFLOW	2	/* trace buffer overflow */
# define TRAP_WATCHPT	3	/* watchpoint match */
# define TRAP_ILLTRAP	4	/* illegal trap */
#endif
#define NSIGTRAP	4

/*
 * There is an additional set of SIGTRAP si_codes used by ptrace
 * that are of the form: ((PTRACE_EVENT_XXX << 8) | SIGTRAP)
 */

/*
 * SIGCHLD si_codes
 */
#define CLD_EXITED	1	/* child has exited */
#define CLD_KILLED	2	/* child was killed */
#define CLD_DUMPED	3	/* child terminated abnormally */
#define CLD_TRAPPED	4	/* traced child has trapped */
#define CLD_STOPPED	5	/* child has stopped */
#define CLD_CONTINUED	6	/* stopped child has continued */
#define NSIGCHLD	6

/*
 * SIGPOLL (or any other signal without signal specific si_codes) si_codes
 */
#define POLL_IN		1	/* data input available */
#define POLL_OUT	2	/* output buffers available */
#define POLL_MSG	3	/* input message available */
#define POLL_ERR	4	/* i/o error */
#define POLL_PRI	5	/* high priority input available */
#define POLL_HUP	6	/* device disconnected */
#define NSIGPOLL	6

/*
 * SIGSYS si_codes
 */
#define SYS_SECCOMP	1	/* seccomp triggered */
#define NSIGSYS		1

/*
 * sigevent definitions
 * 
 * It seems likely that SIGEV_THREAD will have to be handled from 
 * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
 * thread manager then catches and does the appropriate nonsense.
 * However, everything is written out here so as to not get lost.
 */
#define SIGEV_SIGNAL	0	/* notify via signal */
#define SIGEV_NONE	1	/* other notification: meaningless */
#define SIGEV_THREAD	2	/* deliver via thread creation */
#define SIGEV_THREAD_ID 4	/* deliver to thread */

/*
 * This works because the alignment is ok on all current architectures
 * but we leave open this being overridden in the future
 */
#ifndef __ARCH_SIGEV_PREAMBLE_SIZE
#define __ARCH_SIGEV_PREAMBLE_SIZE	(sizeof(int) * 2 + sizeof(sigval_t))
#endif

#define SIGEV_MAX_SIZE	64
#define SIGEV_PAD_SIZE	((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
		/ sizeof(int))

typedef struct sigevent {
	sigval_t sigev_value;
	int sigev_signo;
	int sigev_notify;
	union {
		int _pad[SIGEV_PAD_SIZE];
		 int _tid;

		struct {
			void (*_function)(sigval_t);
			void *_attribute;	/* really pthread_attr_t */
		} _sigev_thread;
	} _sigev_un;
} sigevent_t;

#define sigev_notify_function	_sigev_un._sigev_thread._function
#define sigev_notify_attributes	_sigev_un._sigev_thread._attribute
#define sigev_notify_thread_id	 _sigev_un._tid


#endif /* _UAPI_ASM_GENERIC_SIGINFO_H */