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
8typedef 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 */
37union __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 used by the kernel. Historic leftover. Always 0. */
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
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 *_lower;
86 void *_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 *_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 \
118struct { \
119 int si_signo; \
120 int si_errno; \
121 int si_code; \
122 union __sifields _sifields; \
123}
124#else
125#define __SIGINFO \
126struct { \
127 int si_signo; \
128 int si_code; \
129 int si_errno; \
130 union __sifields _sifields; \
131}
132#endif /* __ARCH_HAS_SWAPPED_SIGINFO */
133
134typedef 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
336typedef 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 /* _ASM_GENERIC_SIGINFO_H */