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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#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
32union __sifields {
33 /* kill() */
34 struct {
35 __kernel_pid_t _pid; /* sender's pid */
36 __kernel_uid32_t _uid; /* sender's uid */
37 } _kill;
38
39 /* POSIX.1b timers */
40 struct {
41 __kernel_timer_t _tid; /* timer id */
42 int _overrun; /* overrun count */
43 sigval_t _sigval; /* same as below */
44 int _sys_private; /* not to be passed to user */
45 } _timer;
46
47 /* POSIX.1b signals */
48 struct {
49 __kernel_pid_t _pid; /* sender's pid */
50 __kernel_uid32_t _uid; /* sender's uid */
51 sigval_t _sigval;
52 } _rt;
53
54 /* SIGCHLD */
55 struct {
56 __kernel_pid_t _pid; /* which child */
57 __kernel_uid32_t _uid; /* sender's uid */
58 int _status; /* exit code */
59 __ARCH_SI_CLOCK_T _utime;
60 __ARCH_SI_CLOCK_T _stime;
61 } _sigchld;
62
63 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
64 struct {
65 void __user *_addr; /* faulting insn/memory ref. */
66#ifdef __ia64__
67 int _imm; /* immediate value for "break" */
68 unsigned int _flags; /* see ia64 si_flags */
69 unsigned long _isr; /* isr */
70#endif
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 } _perf;
98 };
99 } _sigfault;
100
101 /* SIGPOLL */
102 struct {
103 __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
104 int _fd;
105 } _sigpoll;
106
107 /* SIGSYS */
108 struct {
109 void __user *_call_addr; /* calling user insn */
110 int _syscall; /* triggering system call number */
111 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
112 } _sigsys;
113};
114
115#ifndef __ARCH_HAS_SWAPPED_SIGINFO
116#define __SIGINFO \
117struct { \
118 int si_signo; \
119 int si_errno; \
120 int si_code; \
121 union __sifields _sifields; \
122}
123#else
124#define __SIGINFO \
125struct { \
126 int si_signo; \
127 int si_code; \
128 int si_errno; \
129 union __sifields _sifields; \
130}
131#endif /* __ARCH_HAS_SWAPPED_SIGINFO */
132
133typedef struct siginfo {
134 union {
135 __SIGINFO;
136 int _si_pad[SI_MAX_SIZE/sizeof(int)];
137 };
138} __ARCH_SI_ATTRIBUTES siginfo_t;
139
140/*
141 * How these fields are to be accessed.
142 */
143#define si_pid _sifields._kill._pid
144#define si_uid _sifields._kill._uid
145#define si_tid _sifields._timer._tid
146#define si_overrun _sifields._timer._overrun
147#define si_sys_private _sifields._timer._sys_private
148#define si_status _sifields._sigchld._status
149#define si_utime _sifields._sigchld._utime
150#define si_stime _sifields._sigchld._stime
151#define si_value _sifields._rt._sigval
152#define si_int _sifields._rt._sigval.sival_int
153#define si_ptr _sifields._rt._sigval.sival_ptr
154#define si_addr _sifields._sigfault._addr
155#define si_trapno _sifields._sigfault._trapno
156#define si_addr_lsb _sifields._sigfault._addr_lsb
157#define si_lower _sifields._sigfault._addr_bnd._lower
158#define si_upper _sifields._sigfault._addr_bnd._upper
159#define si_pkey _sifields._sigfault._addr_pkey._pkey
160#define si_perf_data _sifields._sigfault._perf._data
161#define si_perf_type _sifields._sigfault._perf._type
162#define si_band _sifields._sigpoll._band
163#define si_fd _sifields._sigpoll._fd
164#define si_call_addr _sifields._sigsys._call_addr
165#define si_syscall _sifields._sigsys._syscall
166#define si_arch _sifields._sigsys._arch
167
168/*
169 * si_code values
170 * Digital reserves positive values for kernel-generated signals.
171 */
172#define SI_USER 0 /* sent by kill, sigsend, raise */
173#define SI_KERNEL 0x80 /* sent by the kernel from somewhere */
174#define SI_QUEUE -1 /* sent by sigqueue */
175#define SI_TIMER -2 /* sent by timer expiration */
176#define SI_MESGQ -3 /* sent by real time mesq state change */
177#define SI_ASYNCIO -4 /* sent by AIO completion */
178#define SI_SIGIO -5 /* sent by queued SIGIO */
179#define SI_TKILL -6 /* sent by tkill system call */
180#define SI_DETHREAD -7 /* sent by execve() killing subsidiary threads */
181#define SI_ASYNCNL -60 /* sent by glibc async name lookup completion */
182
183#define SI_FROMUSER(siptr) ((siptr)->si_code <= 0)
184#define SI_FROMKERNEL(siptr) ((siptr)->si_code > 0)
185
186/*
187 * SIGILL si_codes
188 */
189#define ILL_ILLOPC 1 /* illegal opcode */
190#define ILL_ILLOPN 2 /* illegal operand */
191#define ILL_ILLADR 3 /* illegal addressing mode */
192#define ILL_ILLTRP 4 /* illegal trap */
193#define ILL_PRVOPC 5 /* privileged opcode */
194#define ILL_PRVREG 6 /* privileged register */
195#define ILL_COPROC 7 /* coprocessor error */
196#define ILL_BADSTK 8 /* internal stack error */
197#define ILL_BADIADDR 9 /* unimplemented instruction address */
198#define __ILL_BREAK 10 /* illegal break */
199#define __ILL_BNDMOD 11 /* bundle-update (modification) in progress */
200#define NSIGILL 11
201
202/*
203 * SIGFPE si_codes
204 */
205#define FPE_INTDIV 1 /* integer divide by zero */
206#define FPE_INTOVF 2 /* integer overflow */
207#define FPE_FLTDIV 3 /* floating point divide by zero */
208#define FPE_FLTOVF 4 /* floating point overflow */
209#define FPE_FLTUND 5 /* floating point underflow */
210#define FPE_FLTRES 6 /* floating point inexact result */
211#define FPE_FLTINV 7 /* floating point invalid operation */
212#define FPE_FLTSUB 8 /* subscript out of range */
213#define __FPE_DECOVF 9 /* decimal overflow */
214#define __FPE_DECDIV 10 /* decimal division by zero */
215#define __FPE_DECERR 11 /* packed decimal error */
216#define __FPE_INVASC 12 /* invalid ASCII digit */
217#define __FPE_INVDEC 13 /* invalid decimal digit */
218#define FPE_FLTUNK 14 /* undiagnosed floating-point exception */
219#define FPE_CONDTRAP 15 /* trap on condition */
220#define NSIGFPE 15
221
222/*
223 * SIGSEGV si_codes
224 */
225#define SEGV_MAPERR 1 /* address not mapped to object */
226#define SEGV_ACCERR 2 /* invalid permissions for mapped object */
227#define SEGV_BNDERR 3 /* failed address bound checks */
228#ifdef __ia64__
229# define __SEGV_PSTKOVF 4 /* paragraph stack overflow */
230#else
231# define SEGV_PKUERR 4 /* failed protection key checks */
232#endif
233#define SEGV_ACCADI 5 /* ADI not enabled for mapped object */
234#define SEGV_ADIDERR 6 /* Disrupting MCD error */
235#define SEGV_ADIPERR 7 /* Precise MCD exception */
236#define SEGV_MTEAERR 8 /* Asynchronous ARM MTE error */
237#define SEGV_MTESERR 9 /* Synchronous ARM MTE exception */
238#define NSIGSEGV 9
239
240/*
241 * SIGBUS si_codes
242 */
243#define BUS_ADRALN 1 /* invalid address alignment */
244#define BUS_ADRERR 2 /* non-existent physical address */
245#define BUS_OBJERR 3 /* object specific hardware error */
246/* hardware memory error consumed on a machine check: action required */
247#define BUS_MCEERR_AR 4
248/* hardware memory error detected in process but not consumed: action optional*/
249#define BUS_MCEERR_AO 5
250#define NSIGBUS 5
251
252/*
253 * SIGTRAP si_codes
254 */
255#define TRAP_BRKPT 1 /* process breakpoint */
256#define TRAP_TRACE 2 /* process trace trap */
257#define TRAP_BRANCH 3 /* process taken branch trap */
258#define TRAP_HWBKPT 4 /* hardware breakpoint/watchpoint */
259#define TRAP_UNK 5 /* undiagnosed trap */
260#define TRAP_PERF 6 /* perf event with sigtrap=1 */
261#define NSIGTRAP 6
262
263/*
264 * There is an additional set of SIGTRAP si_codes used by ptrace
265 * that are of the form: ((PTRACE_EVENT_XXX << 8) | SIGTRAP)
266 */
267
268/*
269 * SIGCHLD si_codes
270 */
271#define CLD_EXITED 1 /* child has exited */
272#define CLD_KILLED 2 /* child was killed */
273#define CLD_DUMPED 3 /* child terminated abnormally */
274#define CLD_TRAPPED 4 /* traced child has trapped */
275#define CLD_STOPPED 5 /* child has stopped */
276#define CLD_CONTINUED 6 /* stopped child has continued */
277#define NSIGCHLD 6
278
279/*
280 * SIGPOLL (or any other signal without signal specific si_codes) si_codes
281 */
282#define POLL_IN 1 /* data input available */
283#define POLL_OUT 2 /* output buffers available */
284#define POLL_MSG 3 /* input message available */
285#define POLL_ERR 4 /* i/o error */
286#define POLL_PRI 5 /* high priority input available */
287#define POLL_HUP 6 /* device disconnected */
288#define NSIGPOLL 6
289
290/*
291 * SIGSYS si_codes
292 */
293#define SYS_SECCOMP 1 /* seccomp triggered */
294#define SYS_USER_DISPATCH 2 /* syscall user dispatch triggered */
295#define NSIGSYS 2
296
297/*
298 * SIGEMT si_codes
299 */
300#define EMT_TAGOVF 1 /* tag overflow */
301#define NSIGEMT 1
302
303/*
304 * sigevent definitions
305 *
306 * It seems likely that SIGEV_THREAD will have to be handled from
307 * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
308 * thread manager then catches and does the appropriate nonsense.
309 * However, everything is written out here so as to not get lost.
310 */
311#define SIGEV_SIGNAL 0 /* notify via signal */
312#define SIGEV_NONE 1 /* other notification: meaningless */
313#define SIGEV_THREAD 2 /* deliver via thread creation */
314#define SIGEV_THREAD_ID 4 /* deliver to thread */
315
316/*
317 * This works because the alignment is ok on all current architectures
318 * but we leave open this being overridden in the future
319 */
320#ifndef __ARCH_SIGEV_PREAMBLE_SIZE
321#define __ARCH_SIGEV_PREAMBLE_SIZE (sizeof(int) * 2 + sizeof(sigval_t))
322#endif
323
324#define SIGEV_MAX_SIZE 64
325#define SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
326 / sizeof(int))
327
328typedef struct sigevent {
329 sigval_t sigev_value;
330 int sigev_signo;
331 int sigev_notify;
332 union {
333 int _pad[SIGEV_PAD_SIZE];
334 int _tid;
335
336 struct {
337 void (*_function)(sigval_t);
338 void *_attribute; /* really pthread_attr_t */
339 } _sigev_thread;
340 } _sigev_un;
341} sigevent_t;
342
343#define sigev_notify_function _sigev_un._sigev_thread._function
344#define sigev_notify_attributes _sigev_un._sigev_thread._attribute
345#define sigev_notify_thread_id _sigev_un._tid
346
347
348#endif /* _UAPI_ASM_GENERIC_SIGINFO_H */