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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
8typedef union sigval {
9 int sival_int;
10 void __user *sival_ptr;
11} sigval_t;
12
13/*
14 * This is the size (including padding) of the part of the
15 * struct siginfo that is before the union.
16 */
17#ifndef __ARCH_SI_PREAMBLE_SIZE
18#define __ARCH_SI_PREAMBLE_SIZE (3 * sizeof(int))
19#endif
20
21#define SI_MAX_SIZE 128
22#ifndef SI_PAD_SIZE
23#define SI_PAD_SIZE ((SI_MAX_SIZE - __ARCH_SI_PREAMBLE_SIZE) / sizeof(int))
24#endif
25
26#ifndef __ARCH_SI_UID_T
27#define __ARCH_SI_UID_T __kernel_uid32_t
28#endif
29
30/*
31 * The default "si_band" type is "long", as specified by POSIX.
32 * However, some architectures want to override this to "int"
33 * for historical compatibility reasons, so we allow that.
34 */
35#ifndef __ARCH_SI_BAND_T
36#define __ARCH_SI_BAND_T long
37#endif
38
39#ifndef __ARCH_SI_CLOCK_T
40#define __ARCH_SI_CLOCK_T __kernel_clock_t
41#endif
42
43#ifndef __ARCH_SI_ATTRIBUTES
44#define __ARCH_SI_ATTRIBUTES
45#endif
46
47#ifndef HAVE_ARCH_SIGINFO_T
48
49typedef struct siginfo {
50 int si_signo;
51 int si_errno;
52 int si_code;
53
54 union {
55 int _pad[SI_PAD_SIZE];
56
57 /* kill() */
58 struct {
59 __kernel_pid_t _pid; /* sender's pid */
60 __ARCH_SI_UID_T _uid; /* sender's uid */
61 } _kill;
62
63 /* POSIX.1b timers */
64 struct {
65 __kernel_timer_t _tid; /* timer id */
66 int _overrun; /* overrun count */
67 char _pad[sizeof( __ARCH_SI_UID_T) - sizeof(int)];
68 sigval_t _sigval; /* same as below */
69 int _sys_private; /* not to be passed to user */
70 } _timer;
71
72 /* POSIX.1b signals */
73 struct {
74 __kernel_pid_t _pid; /* sender's pid */
75 __ARCH_SI_UID_T _uid; /* sender's uid */
76 sigval_t _sigval;
77 } _rt;
78
79 /* SIGCHLD */
80 struct {
81 __kernel_pid_t _pid; /* which child */
82 __ARCH_SI_UID_T _uid; /* sender's uid */
83 int _status; /* exit code */
84 __ARCH_SI_CLOCK_T _utime;
85 __ARCH_SI_CLOCK_T _stime;
86 } _sigchld;
87
88 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
89 struct {
90 void __user *_addr; /* faulting insn/memory ref. */
91#ifdef __ARCH_SI_TRAPNO
92 int _trapno; /* TRAP # which caused the signal */
93#endif
94 short _addr_lsb; /* LSB of the reported address */
95 union {
96 /* used when si_code=SEGV_BNDERR */
97 struct {
98 void __user *_lower;
99 void __user *_upper;
100 } _addr_bnd;
101 /* used when si_code=SEGV_PKUERR */
102 __u32 _pkey;
103 };
104 } _sigfault;
105
106 /* SIGPOLL */
107 struct {
108 __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
109 int _fd;
110 } _sigpoll;
111
112 /* SIGSYS */
113 struct {
114 void __user *_call_addr; /* calling user insn */
115 int _syscall; /* triggering system call number */
116 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
117 } _sigsys;
118 } _sifields;
119} __ARCH_SI_ATTRIBUTES siginfo_t;
120
121/* If the arch shares siginfo, then it has SIGSYS. */
122#define __ARCH_SIGSYS
123#endif
124
125/*
126 * How these fields are to be accessed.
127 */
128#define si_pid _sifields._kill._pid
129#define si_uid _sifields._kill._uid
130#define si_tid _sifields._timer._tid
131#define si_overrun _sifields._timer._overrun
132#define si_sys_private _sifields._timer._sys_private
133#define si_status _sifields._sigchld._status
134#define si_utime _sifields._sigchld._utime
135#define si_stime _sifields._sigchld._stime
136#define si_value _sifields._rt._sigval
137#define si_int _sifields._rt._sigval.sival_int
138#define si_ptr _sifields._rt._sigval.sival_ptr
139#define si_addr _sifields._sigfault._addr
140#ifdef __ARCH_SI_TRAPNO
141#define si_trapno _sifields._sigfault._trapno
142#endif
143#define si_addr_lsb _sifields._sigfault._addr_lsb
144#define si_lower _sifields._sigfault._addr_bnd._lower
145#define si_upper _sifields._sigfault._addr_bnd._upper
146#define si_pkey _sifields._sigfault._pkey
147#define si_band _sifields._sigpoll._band
148#define si_fd _sifields._sigpoll._fd
149#ifdef __ARCH_SIGSYS
150#define si_call_addr _sifields._sigsys._call_addr
151#define si_syscall _sifields._sigsys._syscall
152#define si_arch _sifields._sigsys._arch
153#endif
154
155/*
156 * si_code values
157 * Digital reserves positive values for kernel-generated signals.
158 */
159#define SI_USER 0 /* sent by kill, sigsend, raise */
160#define SI_KERNEL 0x80 /* sent by the kernel from somewhere */
161#define SI_QUEUE -1 /* sent by sigqueue */
162#define SI_TIMER -2 /* sent by timer expiration */
163#define SI_MESGQ -3 /* sent by real time mesq state change */
164#define SI_ASYNCIO -4 /* sent by AIO completion */
165#define SI_SIGIO -5 /* sent by queued SIGIO */
166#define SI_TKILL -6 /* sent by tkill system call */
167#define SI_DETHREAD -7 /* sent by execve() killing subsidiary threads */
168
169#define SI_FROMUSER(siptr) ((siptr)->si_code <= 0)
170#define SI_FROMKERNEL(siptr) ((siptr)->si_code > 0)
171
172/*
173 * SIGILL si_codes
174 */
175#define ILL_ILLOPC 1 /* illegal opcode */
176#define ILL_ILLOPN 2 /* illegal operand */
177#define ILL_ILLADR 3 /* illegal addressing mode */
178#define ILL_ILLTRP 4 /* illegal trap */
179#define ILL_PRVOPC 5 /* privileged opcode */
180#define ILL_PRVREG 6 /* privileged register */
181#define ILL_COPROC 7 /* coprocessor error */
182#define ILL_BADSTK 8 /* internal stack error */
183#define NSIGILL 8
184
185/*
186 * SIGFPE si_codes
187 */
188#define FPE_INTDIV 1 /* integer divide by zero */
189#define FPE_INTOVF 2 /* integer overflow */
190#define FPE_FLTDIV 3 /* floating point divide by zero */
191#define FPE_FLTOVF 4 /* floating point overflow */
192#define FPE_FLTUND 5 /* floating point underflow */
193#define FPE_FLTRES 6 /* floating point inexact result */
194#define FPE_FLTINV 7 /* floating point invalid operation */
195#define FPE_FLTSUB 8 /* subscript out of range */
196#define NSIGFPE 8
197
198/*
199 * SIGSEGV si_codes
200 */
201#define SEGV_MAPERR 1 /* address not mapped to object */
202#define SEGV_ACCERR 2 /* invalid permissions for mapped object */
203#define SEGV_BNDERR 3 /* failed address bound checks */
204#define SEGV_PKUERR 4 /* failed protection key checks */
205#define NSIGSEGV 4
206
207/*
208 * SIGBUS si_codes
209 */
210#define BUS_ADRALN 1 /* invalid address alignment */
211#define BUS_ADRERR 2 /* non-existent physical address */
212#define BUS_OBJERR 3 /* object specific hardware error */
213/* hardware memory error consumed on a machine check: action required */
214#define BUS_MCEERR_AR 4
215/* hardware memory error detected in process but not consumed: action optional*/
216#define BUS_MCEERR_AO 5
217#define NSIGBUS 5
218
219/*
220 * SIGTRAP si_codes
221 */
222#define TRAP_BRKPT 1 /* process breakpoint */
223#define TRAP_TRACE 2 /* process trace trap */
224#define TRAP_BRANCH 3 /* process taken branch trap */
225#define TRAP_HWBKPT 4 /* hardware breakpoint/watchpoint */
226#define NSIGTRAP 4
227
228/*
229 * SIGCHLD si_codes
230 */
231#define CLD_EXITED 1 /* child has exited */
232#define CLD_KILLED 2 /* child was killed */
233#define CLD_DUMPED 3 /* child terminated abnormally */
234#define CLD_TRAPPED 4 /* traced child has trapped */
235#define CLD_STOPPED 5 /* child has stopped */
236#define CLD_CONTINUED 6 /* stopped child has continued */
237#define NSIGCHLD 6
238
239/*
240 * SIGPOLL (or any other signal without signal specific si_codes) si_codes
241 */
242#define POLL_IN 1 /* data input available */
243#define POLL_OUT 2 /* output buffers available */
244#define POLL_MSG 3 /* input message available */
245#define POLL_ERR 4 /* i/o error */
246#define POLL_PRI 5 /* high priority input available */
247#define POLL_HUP 6 /* device disconnected */
248#define NSIGPOLL 6
249
250/*
251 * SIGSYS si_codes
252 */
253#define SYS_SECCOMP 1 /* seccomp triggered */
254#define NSIGSYS 1
255
256/*
257 * sigevent definitions
258 *
259 * It seems likely that SIGEV_THREAD will have to be handled from
260 * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
261 * thread manager then catches and does the appropriate nonsense.
262 * However, everything is written out here so as to not get lost.
263 */
264#define SIGEV_SIGNAL 0 /* notify via signal */
265#define SIGEV_NONE 1 /* other notification: meaningless */
266#define SIGEV_THREAD 2 /* deliver via thread creation */
267#define SIGEV_THREAD_ID 4 /* deliver to thread */
268
269/*
270 * This works because the alignment is ok on all current architectures
271 * but we leave open this being overridden in the future
272 */
273#ifndef __ARCH_SIGEV_PREAMBLE_SIZE
274#define __ARCH_SIGEV_PREAMBLE_SIZE (sizeof(int) * 2 + sizeof(sigval_t))
275#endif
276
277#define SIGEV_MAX_SIZE 64
278#define SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
279 / sizeof(int))
280
281typedef struct sigevent {
282 sigval_t sigev_value;
283 int sigev_signo;
284 int sigev_notify;
285 union {
286 int _pad[SIGEV_PAD_SIZE];
287 int _tid;
288
289 struct {
290 void (*_function)(sigval_t);
291 void *_attribute; /* really pthread_attr_t */
292 } _sigev_thread;
293 } _sigev_un;
294} sigevent_t;
295
296#define sigev_notify_function _sigev_un._sigev_thread._function
297#define sigev_notify_attributes _sigev_un._sigev_thread._attribute
298#define sigev_notify_thread_id _sigev_un._tid
299
300
301#endif /* _UAPI_ASM_GENERIC_SIGINFO_H */