1#ifndef _ASM_GENERIC_SIGINFO_H 2#define _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 uid_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 HAVE_ARCH_SIGINFO_T 39 40typedef struct siginfo { 41 int si_signo; 42 int si_errno; 43 int si_code; 44 45 union { 46 int _pad[SI_PAD_SIZE]; 47 48 /* kill() */ 49 struct { 50 pid_t _pid; /* sender's pid */ 51 __ARCH_SI_UID_T _uid; /* sender's uid */ 52 } _kill; 53 54 /* POSIX.1b timers */ 55 struct { 56 timer_t _tid; /* timer id */ 57 int _overrun; /* overrun count */ 58 char _pad[sizeof( __ARCH_SI_UID_T) - sizeof(int)]; 59 sigval_t _sigval; /* same as below */ 60 int _sys_private; /* not to be passed to user */ 61 } _timer; 62 63 /* POSIX.1b signals */ 64 struct { 65 pid_t _pid; /* sender's pid */ 66 __ARCH_SI_UID_T _uid; /* sender's uid */ 67 sigval_t _sigval; 68 } _rt; 69 70 /* SIGCHLD */ 71 struct { 72 pid_t _pid; /* which child */ 73 __ARCH_SI_UID_T _uid; /* sender's uid */ 74 int _status; /* exit code */ 75 clock_t _utime; 76 clock_t _stime; 77 } _sigchld; 78 79 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ 80 struct { 81 void __user *_addr; /* faulting insn/memory ref. */ 82#ifdef __ARCH_SI_TRAPNO 83 int _trapno; /* TRAP # which caused the signal */ 84#endif 85 } _sigfault; 86 87 /* SIGPOLL */ 88 struct { 89 __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 90 int _fd; 91 } _sigpoll; 92 } _sifields; 93} siginfo_t; 94 95#endif 96 97/* 98 * How these fields are to be accessed. 99 */ 100#define si_pid _sifields._kill._pid 101#define si_uid _sifields._kill._uid 102#define si_tid _sifields._timer._tid 103#define si_overrun _sifields._timer._overrun 104#define si_sys_private _sifields._timer._sys_private 105#define si_status _sifields._sigchld._status 106#define si_utime _sifields._sigchld._utime 107#define si_stime _sifields._sigchld._stime 108#define si_value _sifields._rt._sigval 109#define si_int _sifields._rt._sigval.sival_int 110#define si_ptr _sifields._rt._sigval.sival_ptr 111#define si_addr _sifields._sigfault._addr 112#ifdef __ARCH_SI_TRAPNO 113#define si_trapno _sifields._sigfault._trapno 114#endif 115#define si_band _sifields._sigpoll._band 116#define si_fd _sifields._sigpoll._fd 117 118#ifdef __KERNEL__ 119#define __SI_MASK 0xffff0000u 120#define __SI_KILL (0 << 16) 121#define __SI_TIMER (1 << 16) 122#define __SI_POLL (2 << 16) 123#define __SI_FAULT (3 << 16) 124#define __SI_CHLD (4 << 16) 125#define __SI_RT (5 << 16) 126#define __SI_MESGQ (6 << 16) 127#define __SI_CODE(T,N) ((T) | ((N) & 0xffff)) 128#else 129#define __SI_KILL 0 130#define __SI_TIMER 0 131#define __SI_POLL 0 132#define __SI_FAULT 0 133#define __SI_CHLD 0 134#define __SI_RT 0 135#define __SI_MESGQ 0 136#define __SI_CODE(T,N) (N) 137#endif 138 139/* 140 * si_code values 141 * Digital reserves positive values for kernel-generated signals. 142 */ 143#define SI_USER 0 /* sent by kill, sigsend, raise */ 144#define SI_KERNEL 0x80 /* sent by the kernel from somewhere */ 145#define SI_QUEUE -1 /* sent by sigqueue */ 146#define SI_TIMER __SI_CODE(__SI_TIMER,-2) /* sent by timer expiration */ 147#define SI_MESGQ __SI_CODE(__SI_MESGQ,-3) /* sent by real time mesq state change */ 148#define SI_ASYNCIO -4 /* sent by AIO completion */ 149#define SI_SIGIO -5 /* sent by queued SIGIO */ 150#define SI_TKILL -6 /* sent by tkill system call */ 151#define SI_DETHREAD -7 /* sent by execve() killing subsidiary threads */ 152 153#define SI_FROMUSER(siptr) ((siptr)->si_code <= 0) 154#define SI_FROMKERNEL(siptr) ((siptr)->si_code > 0) 155 156/* 157 * SIGILL si_codes 158 */ 159#define ILL_ILLOPC (__SI_FAULT|1) /* illegal opcode */ 160#define ILL_ILLOPN (__SI_FAULT|2) /* illegal operand */ 161#define ILL_ILLADR (__SI_FAULT|3) /* illegal addressing mode */ 162#define ILL_ILLTRP (__SI_FAULT|4) /* illegal trap */ 163#define ILL_PRVOPC (__SI_FAULT|5) /* privileged opcode */ 164#define ILL_PRVREG (__SI_FAULT|6) /* privileged register */ 165#define ILL_COPROC (__SI_FAULT|7) /* coprocessor error */ 166#define ILL_BADSTK (__SI_FAULT|8) /* internal stack error */ 167#define NSIGILL 8 168 169/* 170 * SIGFPE si_codes 171 */ 172#define FPE_INTDIV (__SI_FAULT|1) /* integer divide by zero */ 173#define FPE_INTOVF (__SI_FAULT|2) /* integer overflow */ 174#define FPE_FLTDIV (__SI_FAULT|3) /* floating point divide by zero */ 175#define FPE_FLTOVF (__SI_FAULT|4) /* floating point overflow */ 176#define FPE_FLTUND (__SI_FAULT|5) /* floating point underflow */ 177#define FPE_FLTRES (__SI_FAULT|6) /* floating point inexact result */ 178#define FPE_FLTINV (__SI_FAULT|7) /* floating point invalid operation */ 179#define FPE_FLTSUB (__SI_FAULT|8) /* subscript out of range */ 180#define NSIGFPE 8 181 182/* 183 * SIGSEGV si_codes 184 */ 185#define SEGV_MAPERR (__SI_FAULT|1) /* address not mapped to object */ 186#define SEGV_ACCERR (__SI_FAULT|2) /* invalid permissions for mapped object */ 187#define NSIGSEGV 2 188 189/* 190 * SIGBUS si_codes 191 */ 192#define BUS_ADRALN (__SI_FAULT|1) /* invalid address alignment */ 193#define BUS_ADRERR (__SI_FAULT|2) /* non-existant physical address */ 194#define BUS_OBJERR (__SI_FAULT|3) /* object specific hardware error */ 195#define NSIGBUS 3 196 197/* 198 * SIGTRAP si_codes 199 */ 200#define TRAP_BRKPT (__SI_FAULT|1) /* process breakpoint */ 201#define TRAP_TRACE (__SI_FAULT|2) /* process trace trap */ 202#define NSIGTRAP 2 203 204/* 205 * SIGCHLD si_codes 206 */ 207#define CLD_EXITED (__SI_CHLD|1) /* child has exited */ 208#define CLD_KILLED (__SI_CHLD|2) /* child was killed */ 209#define CLD_DUMPED (__SI_CHLD|3) /* child terminated abnormally */ 210#define CLD_TRAPPED (__SI_CHLD|4) /* traced child has trapped */ 211#define CLD_STOPPED (__SI_CHLD|5) /* child has stopped */ 212#define CLD_CONTINUED (__SI_CHLD|6) /* stopped child has continued */ 213#define NSIGCHLD 6 214 215/* 216 * SIGPOLL si_codes 217 */ 218#define POLL_IN (__SI_POLL|1) /* data input available */ 219#define POLL_OUT (__SI_POLL|2) /* output buffers available */ 220#define POLL_MSG (__SI_POLL|3) /* input message available */ 221#define POLL_ERR (__SI_POLL|4) /* i/o error */ 222#define POLL_PRI (__SI_POLL|5) /* high priority input available */ 223#define POLL_HUP (__SI_POLL|6) /* device disconnected */ 224#define NSIGPOLL 6 225 226/* 227 * sigevent definitions 228 * 229 * It seems likely that SIGEV_THREAD will have to be handled from 230 * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the 231 * thread manager then catches and does the appropriate nonsense. 232 * However, everything is written out here so as to not get lost. 233 */ 234#define SIGEV_SIGNAL 0 /* notify via signal */ 235#define SIGEV_NONE 1 /* other notification: meaningless */ 236#define SIGEV_THREAD 2 /* deliver via thread creation */ 237#define SIGEV_THREAD_ID 4 /* deliver to thread */ 238 239/* 240 * This works because the alignment is ok on all current architectures 241 * but we leave open this being overridden in the future 242 */ 243#ifndef __ARCH_SIGEV_PREAMBLE_SIZE 244#define __ARCH_SIGEV_PREAMBLE_SIZE (sizeof(int) * 2 + sizeof(sigval_t)) 245#endif 246 247#define SIGEV_MAX_SIZE 64 248#define SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \ 249 / sizeof(int)) 250 251typedef struct sigevent { 252 sigval_t sigev_value; 253 int sigev_signo; 254 int sigev_notify; 255 union { 256 int _pad[SIGEV_PAD_SIZE]; 257 int _tid; 258 259 struct { 260 void (*_function)(sigval_t); 261 void *_attribute; /* really pthread_attr_t */ 262 } _sigev_thread; 263 } _sigev_un; 264} sigevent_t; 265 266#define sigev_notify_function _sigev_un._sigev_thread._function 267#define sigev_notify_attributes _sigev_un._sigev_thread._attribute 268#define sigev_notify_thread_id _sigev_un._tid 269 270#ifdef __KERNEL__ 271 272struct siginfo; 273void do_schedule_next_timer(struct siginfo *info); 274 275#ifndef HAVE_ARCH_COPY_SIGINFO 276 277#include <linux/string.h> 278 279static inline void copy_siginfo(struct siginfo *to, struct siginfo *from) 280{ 281 if (from->si_code < 0) 282 memcpy(to, from, sizeof(*to)); 283 else 284 /* _sigchld is currently the largest know union member */ 285 memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld)); 286} 287 288#endif 289 290extern int copy_siginfo_to_user(struct siginfo __user *to, struct siginfo *from); 291 292#endif /* __KERNEL__ */ 293 294#endif 295