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 8 typedef 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 49 typedef 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)) 280 281 typedef 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 */ 302