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fcntl: Don't use ambiguous SIG_POLL si_codes
[mirror_ubuntu-bionic-kernel.git] / include / uapi / asm-generic / siginfo.h
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8a1ab315
DH
1#ifndef _UAPI_ASM_GENERIC_SIGINFO_H
2#define _UAPI_ASM_GENERIC_SIGINFO_H
3
4#include <linux/compiler.h>
5#include <linux/types.h>
6
7typedef union sigval {
8 int sival_int;
9 void __user *sival_ptr;
10} sigval_t;
11
12/*
13 * This is the size (including padding) of the part of the
14 * struct siginfo that is before the union.
15 */
16#ifndef __ARCH_SI_PREAMBLE_SIZE
17#define __ARCH_SI_PREAMBLE_SIZE (3 * sizeof(int))
18#endif
19
20#define SI_MAX_SIZE 128
21#ifndef SI_PAD_SIZE
22#define SI_PAD_SIZE ((SI_MAX_SIZE - __ARCH_SI_PREAMBLE_SIZE) / sizeof(int))
23#endif
24
25#ifndef __ARCH_SI_UID_T
26#define __ARCH_SI_UID_T __kernel_uid32_t
27#endif
28
29/*
30 * The default "si_band" type is "long", as specified by POSIX.
31 * However, some architectures want to override this to "int"
32 * for historical compatibility reasons, so we allow that.
33 */
34#ifndef __ARCH_SI_BAND_T
35#define __ARCH_SI_BAND_T long
36#endif
37
38#ifndef __ARCH_SI_CLOCK_T
39#define __ARCH_SI_CLOCK_T __kernel_clock_t
40#endif
41
42#ifndef __ARCH_SI_ATTRIBUTES
43#define __ARCH_SI_ATTRIBUTES
44#endif
45
46#ifndef HAVE_ARCH_SIGINFO_T
47
48typedef struct siginfo {
49 int si_signo;
50 int si_errno;
51 int si_code;
52
53 union {
54 int _pad[SI_PAD_SIZE];
55
56 /* kill() */
57 struct {
58 __kernel_pid_t _pid; /* sender's pid */
59 __ARCH_SI_UID_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 char _pad[sizeof( __ARCH_SI_UID_T) - sizeof(int)];
67 sigval_t _sigval; /* same as below */
68 int _sys_private; /* not to be passed to user */
69 } _timer;
70
71 /* POSIX.1b signals */
72 struct {
73 __kernel_pid_t _pid; /* sender's pid */
74 __ARCH_SI_UID_T _uid; /* sender's uid */
75 sigval_t _sigval;
76 } _rt;
77
78 /* SIGCHLD */
79 struct {
80 __kernel_pid_t _pid; /* which child */
81 __ARCH_SI_UID_T _uid; /* sender's uid */
82 int _status; /* exit code */
83 __ARCH_SI_CLOCK_T _utime;
84 __ARCH_SI_CLOCK_T _stime;
85 } _sigchld;
86
87 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
88 struct {
89 void __user *_addr; /* faulting insn/memory ref. */
90#ifdef __ARCH_SI_TRAPNO
91 int _trapno; /* TRAP # which caused the signal */
92#endif
93 short _addr_lsb; /* LSB of the reported address */
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94 union {
95 /* used when si_code=SEGV_BNDERR */
96 struct {
97 void __user *_lower;
98 void __user *_upper;
99 } _addr_bnd;
100 /* used when si_code=SEGV_PKUERR */
49cd53bf 101 __u32 _pkey;
cd0ea35f 102 };
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103 } _sigfault;
104
105 /* SIGPOLL */
106 struct {
107 __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */
108 int _fd;
109 } _sigpoll;
110
111 /* SIGSYS */
112 struct {
113 void __user *_call_addr; /* calling user insn */
114 int _syscall; /* triggering system call number */
115 unsigned int _arch; /* AUDIT_ARCH_* of syscall */
116 } _sigsys;
117 } _sifields;
118} __ARCH_SI_ATTRIBUTES siginfo_t;
119
120/* If the arch shares siginfo, then it has SIGSYS. */
121#define __ARCH_SIGSYS
122#endif
123
124/*
125 * How these fields are to be accessed.
126 */
127#define si_pid _sifields._kill._pid
128#define si_uid _sifields._kill._uid
129#define si_tid _sifields._timer._tid
130#define si_overrun _sifields._timer._overrun
131#define si_sys_private _sifields._timer._sys_private
132#define si_status _sifields._sigchld._status
133#define si_utime _sifields._sigchld._utime
134#define si_stime _sifields._sigchld._stime
135#define si_value _sifields._rt._sigval
136#define si_int _sifields._rt._sigval.sival_int
137#define si_ptr _sifields._rt._sigval.sival_ptr
138#define si_addr _sifields._sigfault._addr
139#ifdef __ARCH_SI_TRAPNO
140#define si_trapno _sifields._sigfault._trapno
141#endif
142#define si_addr_lsb _sifields._sigfault._addr_lsb
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143#define si_lower _sifields._sigfault._addr_bnd._lower
144#define si_upper _sifields._sigfault._addr_bnd._upper
cd0ea35f 145#define si_pkey _sifields._sigfault._pkey
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DH
146#define si_band _sifields._sigpoll._band
147#define si_fd _sifields._sigpoll._fd
148#ifdef __ARCH_SIGSYS
149#define si_call_addr _sifields._sigsys._call_addr
150#define si_syscall _sifields._sigsys._syscall
151#define si_arch _sifields._sigsys._arch
152#endif
153
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CH
154#ifdef __KERNEL__
155#define __SI_MASK 0xffff0000u
156#define __SI_KILL (0 << 16)
157#define __SI_TIMER (1 << 16)
158#define __SI_POLL (2 << 16)
159#define __SI_FAULT (3 << 16)
160#define __SI_CHLD (4 << 16)
161#define __SI_RT (5 << 16)
162#define __SI_MESGQ (6 << 16)
163#define __SI_SYS (7 << 16)
164#define __SI_CODE(T,N) ((T) | ((N) & 0xffff))
165#else /* __KERNEL__ */
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DH
166#define __SI_KILL 0
167#define __SI_TIMER 0
168#define __SI_POLL 0
169#define __SI_FAULT 0
170#define __SI_CHLD 0
171#define __SI_RT 0
172#define __SI_MESGQ 0
173#define __SI_SYS 0
174#define __SI_CODE(T,N) (N)
6bc51cba 175#endif /* __KERNEL__ */
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DH
176
177/*
178 * si_code values
179 * Digital reserves positive values for kernel-generated signals.
180 */
181#define SI_USER 0 /* sent by kill, sigsend, raise */
182#define SI_KERNEL 0x80 /* sent by the kernel from somewhere */
183#define SI_QUEUE -1 /* sent by sigqueue */
184#define SI_TIMER __SI_CODE(__SI_TIMER,-2) /* sent by timer expiration */
185#define SI_MESGQ __SI_CODE(__SI_MESGQ,-3) /* sent by real time mesq state change */
186#define SI_ASYNCIO -4 /* sent by AIO completion */
d08477aa 187#define SI_SIGIO __SI_CODE(__SI_POLL,-5) /* sent by queued SIGIO */
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188#define SI_TKILL -6 /* sent by tkill system call */
189#define SI_DETHREAD -7 /* sent by execve() killing subsidiary threads */
190
191#define SI_FROMUSER(siptr) ((siptr)->si_code <= 0)
192#define SI_FROMKERNEL(siptr) ((siptr)->si_code > 0)
193
194/*
195 * SIGILL si_codes
196 */
197#define ILL_ILLOPC (__SI_FAULT|1) /* illegal opcode */
198#define ILL_ILLOPN (__SI_FAULT|2) /* illegal operand */
199#define ILL_ILLADR (__SI_FAULT|3) /* illegal addressing mode */
200#define ILL_ILLTRP (__SI_FAULT|4) /* illegal trap */
201#define ILL_PRVOPC (__SI_FAULT|5) /* privileged opcode */
202#define ILL_PRVREG (__SI_FAULT|6) /* privileged register */
203#define ILL_COPROC (__SI_FAULT|7) /* coprocessor error */
204#define ILL_BADSTK (__SI_FAULT|8) /* internal stack error */
205#define NSIGILL 8
206
207/*
208 * SIGFPE si_codes
209 */
210#define FPE_INTDIV (__SI_FAULT|1) /* integer divide by zero */
211#define FPE_INTOVF (__SI_FAULT|2) /* integer overflow */
212#define FPE_FLTDIV (__SI_FAULT|3) /* floating point divide by zero */
213#define FPE_FLTOVF (__SI_FAULT|4) /* floating point overflow */
214#define FPE_FLTUND (__SI_FAULT|5) /* floating point underflow */
215#define FPE_FLTRES (__SI_FAULT|6) /* floating point inexact result */
216#define FPE_FLTINV (__SI_FAULT|7) /* floating point invalid operation */
217#define FPE_FLTSUB (__SI_FAULT|8) /* subscript out of range */
218#define NSIGFPE 8
219
220/*
221 * SIGSEGV si_codes
222 */
223#define SEGV_MAPERR (__SI_FAULT|1) /* address not mapped to object */
224#define SEGV_ACCERR (__SI_FAULT|2) /* invalid permissions for mapped object */
ee1b58d3 225#define SEGV_BNDERR (__SI_FAULT|3) /* failed address bound checks */
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226#define SEGV_PKUERR (__SI_FAULT|4) /* failed protection key checks */
227#define NSIGSEGV 4
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228
229/*
230 * SIGBUS si_codes
231 */
232#define BUS_ADRALN (__SI_FAULT|1) /* invalid address alignment */
233#define BUS_ADRERR (__SI_FAULT|2) /* non-existent physical address */
234#define BUS_OBJERR (__SI_FAULT|3) /* object specific hardware error */
235/* hardware memory error consumed on a machine check: action required */
236#define BUS_MCEERR_AR (__SI_FAULT|4)
237/* hardware memory error detected in process but not consumed: action optional*/
238#define BUS_MCEERR_AO (__SI_FAULT|5)
239#define NSIGBUS 5
240
241/*
242 * SIGTRAP si_codes
243 */
244#define TRAP_BRKPT (__SI_FAULT|1) /* process breakpoint */
245#define TRAP_TRACE (__SI_FAULT|2) /* process trace trap */
246#define TRAP_BRANCH (__SI_FAULT|3) /* process taken branch trap */
247#define TRAP_HWBKPT (__SI_FAULT|4) /* hardware breakpoint/watchpoint */
248#define NSIGTRAP 4
249
250/*
251 * SIGCHLD si_codes
252 */
253#define CLD_EXITED (__SI_CHLD|1) /* child has exited */
254#define CLD_KILLED (__SI_CHLD|2) /* child was killed */
255#define CLD_DUMPED (__SI_CHLD|3) /* child terminated abnormally */
256#define CLD_TRAPPED (__SI_CHLD|4) /* traced child has trapped */
257#define CLD_STOPPED (__SI_CHLD|5) /* child has stopped */
258#define CLD_CONTINUED (__SI_CHLD|6) /* stopped child has continued */
259#define NSIGCHLD 6
260
261/*
d08477aa 262 * SIGPOLL (or any other signal without signal specific si_codes) si_codes
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DH
263 */
264#define POLL_IN (__SI_POLL|1) /* data input available */
265#define POLL_OUT (__SI_POLL|2) /* output buffers available */
266#define POLL_MSG (__SI_POLL|3) /* input message available */
267#define POLL_ERR (__SI_POLL|4) /* i/o error */
268#define POLL_PRI (__SI_POLL|5) /* high priority input available */
269#define POLL_HUP (__SI_POLL|6) /* device disconnected */
270#define NSIGPOLL 6
271
272/*
273 * SIGSYS si_codes
274 */
275#define SYS_SECCOMP (__SI_SYS|1) /* seccomp triggered */
276#define NSIGSYS 1
277
278/*
279 * sigevent definitions
280 *
281 * It seems likely that SIGEV_THREAD will have to be handled from
282 * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the
283 * thread manager then catches and does the appropriate nonsense.
284 * However, everything is written out here so as to not get lost.
285 */
286#define SIGEV_SIGNAL 0 /* notify via signal */
287#define SIGEV_NONE 1 /* other notification: meaningless */
288#define SIGEV_THREAD 2 /* deliver via thread creation */
289#define SIGEV_THREAD_ID 4 /* deliver to thread */
290
291/*
292 * This works because the alignment is ok on all current architectures
293 * but we leave open this being overridden in the future
294 */
295#ifndef __ARCH_SIGEV_PREAMBLE_SIZE
296#define __ARCH_SIGEV_PREAMBLE_SIZE (sizeof(int) * 2 + sizeof(sigval_t))
297#endif
298
299#define SIGEV_MAX_SIZE 64
300#define SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \
301 / sizeof(int))
302
303typedef struct sigevent {
304 sigval_t sigev_value;
305 int sigev_signo;
306 int sigev_notify;
307 union {
308 int _pad[SIGEV_PAD_SIZE];
309 int _tid;
310
311 struct {
312 void (*_function)(sigval_t);
313 void *_attribute; /* really pthread_attr_t */
314 } _sigev_thread;
315 } _sigev_un;
316} sigevent_t;
317
318#define sigev_notify_function _sigev_un._sigev_thread._function
319#define sigev_notify_attributes _sigev_un._sigev_thread._attribute
320#define sigev_notify_thread_id _sigev_un._tid
321
322
323#endif /* _UAPI_ASM_GENERIC_SIGINFO_H */