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/*
27 * The default "si_band" type is "long", as specified by POSIX.
28 * However, some architectures want to override this to "int"
29 * for historical compatibility reasons, so we allow that.
30 */
31#ifndef __ARCH_SI_BAND_T
32#define __ARCH_SI_BAND_T long
33#endif
34
35#ifndef __ARCH_SI_CLOCK_T
36#define __ARCH_SI_CLOCK_T __kernel_clock_t
37#endif
38
39#ifndef __ARCH_SI_ATTRIBUTES
40#define __ARCH_SI_ATTRIBUTES
41#endif
42
43typedef struct siginfo {
44 int si_signo;
45#ifndef __ARCH_HAS_SWAPPED_SIGINFO
46 int si_errno;
47 int si_code;
48#else
49 int si_code;
50 int si_errno;
51#endif
52
53 union {
54 int _pad[SI_PAD_SIZE];
55
56 /* kill() */
57 struct {
58 __kernel_pid_t _pid; /* sender's pid */
59 __kernel_uid32_t _uid; /* sender's uid */
60 } _kill;
61
62 /* POSIX.1b timers */
63 struct {
64 __kernel_timer_t _tid; /* timer id */
65 int _overrun; /* overrun count */
66 sigval_t _sigval; /* same as below */
67 int _sys_private; /* not to be passed to user */
68 } _timer;
69
70 /* POSIX.1b signals */
71 struct {
72 __kernel_pid_t _pid; /* sender's pid */
73 __kernel_uid32_t _uid; /* sender's uid */
74 sigval_t _sigval;
75 } _rt;
76
77 /* SIGCHLD */
78 struct {
79 __kernel_pid_t _pid; /* which child */
80 __kernel_uid32_t _uid; /* sender's uid */
81 int _status; /* exit code */
82 __ARCH_SI_CLOCK_T _utime;
83 __ARCH_SI_CLOCK_T _stime;
84 } _sigchld;
85
86 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
87 struct {
88 void __user *_addr; /* faulting insn/memory ref. */
89#ifdef __ARCH_SI_TRAPNO
90 int _trapno; /* TRAP # which caused the signal */
91#endif
92#ifdef __ia64__
93 int _imm; /* immediate value for "break" */
94 unsigned int _flags; /* see ia64 si_flags */
95 unsigned long _isr; /* isr */
96#endif
97
98#define __ADDR_BND_PKEY_PAD (__alignof__(void *) < sizeof(short) ? \
99 sizeof(short) : __alignof__(void *))
100 union {
101 /*
102 * used when si_code=BUS_MCEERR_AR or
103 * used when si_code=BUS_MCEERR_AO
104 */
105 short _addr_lsb; /* LSB of the reported address */
106 /* used when si_code=SEGV_BNDERR */
107 struct {
108 char _dummy_bnd[__ADDR_BND_PKEY_PAD];
109 void __user *_lower;
110 void __user *_upper;
111 } _addr_bnd;
112 /* used when si_code=SEGV_PKUERR */
113 struct {
114 char _dummy_pkey[__ADDR_BND_PKEY_PAD];
115 __u32 _pkey;
116 } _addr_pkey;
117 };
118 } _sigfault;
119
120 /* SIGPOLL */
121 struct {
122 __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
123 int _fd;
124 } _sigpoll;
125
126 /* SIGSYS */
127 struct {
128 void __user *_call_addr; /* calling user insn */
129 int _syscall; /* triggering system call number */
130 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
131 } _sigsys;
132 } _sifields;
133} __ARCH_SI_ATTRIBUTES siginfo_t;
134
135/*
136 * How these fields are to be accessed.
137 */
138#define si_pid _sifields._kill._pid
139#define si_uid _sifields._kill._uid
140#define si_tid _sifields._timer._tid
141#define si_overrun _sifields._timer._overrun
142#define si_sys_private _sifields._timer._sys_private
143#define si_status _sifields._sigchld._status
144#define si_utime _sifields._sigchld._utime
145#define si_stime _sifields._sigchld._stime
146#define si_value _sifields._rt._sigval
147#define si_int _sifields._rt._sigval.sival_int
148#define si_ptr _sifields._rt._sigval.sival_ptr
149#define si_addr _sifields._sigfault._addr
150#ifdef __ARCH_SI_TRAPNO
151#define si_trapno _sifields._sigfault._trapno
152#endif
153#define si_addr_lsb _sifields._sigfault._addr_lsb
154#define si_lower _sifields._sigfault._addr_bnd._lower
155#define si_upper _sifields._sigfault._addr_bnd._upper
156#define si_pkey _sifields._sigfault._addr_pkey._pkey
157#define si_band _sifields._sigpoll._band
158#define si_fd _sifields._sigpoll._fd
159#define si_call_addr _sifields._sigsys._call_addr
160#define si_syscall _sifields._sigsys._syscall
161#define si_arch _sifields._sigsys._arch
162
163/*
164 * si_code values
165 * Digital reserves positive values for kernel-generated signals.
166 */
167#define SI_USER 0 /* sent by kill, sigsend, raise */
168#define SI_KERNEL 0x80 /* sent by the kernel from somewhere */
169#define SI_QUEUE -1 /* sent by sigqueue */
170#define SI_TIMER -2 /* sent by timer expiration */
171#define SI_MESGQ -3 /* sent by real time mesq state change */
172#define SI_ASYNCIO -4 /* sent by AIO completion */
173#define SI_SIGIO -5 /* sent by queued SIGIO */
174#define SI_TKILL -6 /* sent by tkill system call */
175#define SI_DETHREAD -7 /* sent by execve() killing subsidiary threads */
176#define SI_ASYNCNL -60 /* sent by glibc async name lookup completion */
177
178#define SI_FROMUSER(siptr) ((siptr)->si_code <= 0)
179#define SI_FROMKERNEL(siptr) ((siptr)->si_code > 0)
180
181/*
182 * SIGILL si_codes
183 */
184#define ILL_ILLOPC 1 /* illegal opcode */
185#define ILL_ILLOPN 2 /* illegal operand */
186#define ILL_ILLADR 3 /* illegal addressing mode */
187#define ILL_ILLTRP 4 /* illegal trap */
188#define ILL_PRVOPC 5 /* privileged opcode */
189#define ILL_PRVREG 6 /* privileged register */
190#define ILL_COPROC 7 /* coprocessor error */
191#define ILL_BADSTK 8 /* internal stack error */
192#define ILL_BADIADDR 9 /* unimplemented instruction address */
193#define __ILL_BREAK 10 /* illegal break */
194#define __ILL_BNDMOD 11 /* bundle-update (modification) in progress */
195#define NSIGILL 11
196
197/*
198 * SIGFPE si_codes
199 */
200#define FPE_INTDIV 1 /* integer divide by zero */
201#define FPE_INTOVF 2 /* integer overflow */
202#define FPE_FLTDIV 3 /* floating point divide by zero */
203#define FPE_FLTOVF 4 /* floating point overflow */
204#define FPE_FLTUND 5 /* floating point underflow */
205#define FPE_FLTRES 6 /* floating point inexact result */
206#define FPE_FLTINV 7 /* floating point invalid operation */
207#define FPE_FLTSUB 8 /* subscript out of range */
208#define __FPE_DECOVF 9 /* decimal overflow */
209#define __FPE_DECDIV 10 /* decimal division by zero */
210#define __FPE_DECERR 11 /* packed decimal error */
211#define __FPE_INVASC 12 /* invalid ASCII digit */
212#define __FPE_INVDEC 13 /* invalid decimal digit */
213#define FPE_FLTUNK 14 /* undiagnosed floating-point exception */
214#define FPE_CONDTRAP 15 /* trap on condition */
215#define NSIGFPE 15
216
217/*
218 * SIGSEGV si_codes
219 */
220#define SEGV_MAPERR 1 /* address not mapped to object */
221#define SEGV_ACCERR 2 /* invalid permissions for mapped object */
222#define SEGV_BNDERR 3 /* failed address bound checks */
223#ifdef __ia64__
224# define __SEGV_PSTKOVF 4 /* paragraph stack overflow */
225#else
226# define SEGV_PKUERR 4 /* failed protection key checks */
227#endif
228#define SEGV_ACCADI 5 /* ADI not enabled for mapped object */
229#define SEGV_ADIDERR 6 /* Disrupting MCD error */
230#define SEGV_ADIPERR 7 /* Precise MCD exception */
231#define NSIGSEGV 7
232
233/*
234 * SIGBUS si_codes
235 */
236#define BUS_ADRALN 1 /* invalid address alignment */
237#define BUS_ADRERR 2 /* non-existent physical address */
238#define BUS_OBJERR 3 /* object specific hardware error */
239/* hardware memory error consumed on a machine check: action required */
240#define BUS_MCEERR_AR 4
241/* hardware memory error detected in process but not consumed: action optional*/
242#define BUS_MCEERR_AO 5
243#define NSIGBUS 5
244
245/*
246 * SIGTRAP si_codes
247 */
248#define TRAP_BRKPT 1 /* process breakpoint */
249#define TRAP_TRACE 2 /* process trace trap */
250#define TRAP_BRANCH 3 /* process taken branch trap */
251#define TRAP_HWBKPT 4 /* hardware breakpoint/watchpoint */
252#define TRAP_UNK 5 /* undiagnosed trap */
253#define NSIGTRAP 5
254
255/*
256 * There is an additional set of SIGTRAP si_codes used by ptrace
257 * that are of the form: ((PTRACE_EVENT_XXX << 8) | SIGTRAP)
258 */
259
260/*
261 * SIGCHLD si_codes
262 */
263#define CLD_EXITED 1 /* child has exited */
264#define CLD_KILLED 2 /* child was killed */
265#define CLD_DUMPED 3 /* child terminated abnormally */
266#define CLD_TRAPPED 4 /* traced child has trapped */
267#define CLD_STOPPED 5 /* child has stopped */
268#define CLD_CONTINUED 6 /* stopped child has continued */
269#define NSIGCHLD 6
270
271/*
272 * SIGPOLL (or any other signal without signal specific si_codes) si_codes
273 */
274#define POLL_IN 1 /* data input available */
275#define POLL_OUT 2 /* output buffers available */
276#define POLL_MSG 3 /* input message available */
277#define POLL_ERR 4 /* i/o error */
278#define POLL_PRI 5 /* high priority input available */
279#define POLL_HUP 6 /* device disconnected */
280#define NSIGPOLL 6
281
282/*
283 * SIGSYS si_codes
284 */
285#define SYS_SECCOMP 1 /* seccomp triggered */
286#define NSIGSYS 1
287
288/*
289 * sigevent definitions
290 *
291 * It seems likely that SIGEV_THREAD will have to be handled from
292 * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
293 * thread manager then catches and does the appropriate nonsense.
294 * However, everything is written out here so as to not get lost.
295 */
296#define SIGEV_SIGNAL 0 /* notify via signal */
297#define SIGEV_NONE 1 /* other notification: meaningless */
298#define SIGEV_THREAD 2 /* deliver via thread creation */
299#define SIGEV_THREAD_ID 4 /* deliver to thread */
300
301/*
302 * This works because the alignment is ok on all current architectures
303 * but we leave open this being overridden in the future
304 */
305#ifndef __ARCH_SIGEV_PREAMBLE_SIZE
306#define __ARCH_SIGEV_PREAMBLE_SIZE (sizeof(int) * 2 + sizeof(sigval_t))
307#endif
308
309#define SIGEV_MAX_SIZE 64
310#define SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
311 / sizeof(int))
312
313typedef struct sigevent {
314 sigval_t sigev_value;
315 int sigev_signo;
316 int sigev_notify;
317 union {
318 int _pad[SIGEV_PAD_SIZE];
319 int _tid;
320
321 struct {
322 void (*_function)(sigval_t);
323 void *_attribute; /* really pthread_attr_t */
324 } _sigev_thread;
325 } _sigev_un;
326} sigevent_t;
327
328#define sigev_notify_function _sigev_un._sigev_thread._function
329#define sigev_notify_attributes _sigev_un._sigev_thread._attribute
330#define sigev_notify_thread_id _sigev_un._tid
331
332
333#endif /* _UAPI_ASM_GENERIC_SIGINFO_H */
334