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 #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 32 /* 33 * Be careful when extending this union. On 32bit siginfo_t is 32bit 34 * aligned. Which means that a 64bit field or any other field that 35 * would increase the alignment of siginfo_t will break the ABI. 36 */ 37 union __sifields { 38 /* kill() */ 39 struct { 40 __kernel_pid_t _pid; /* sender's pid */ 41 __kernel_uid32_t _uid; /* sender's uid */ 42 } _kill; 43 44 /* POSIX.1b timers */ 45 struct { 46 __kernel_timer_t _tid; /* timer id */ 47 int _overrun; /* overrun count */ 48 sigval_t _sigval; /* same as below */ 49 int _sys_private; /* Not used by the kernel. Historic leftover. Always 0. */ 50 } _timer; 51 52 /* POSIX.1b signals */ 53 struct { 54 __kernel_pid_t _pid; /* sender's pid */ 55 __kernel_uid32_t _uid; /* sender's uid */ 56 sigval_t _sigval; 57 } _rt; 58 59 /* SIGCHLD */ 60 struct { 61 __kernel_pid_t _pid; /* which child */ 62 __kernel_uid32_t _uid; /* sender's uid */ 63 int _status; /* exit code */ 64 __ARCH_SI_CLOCK_T _utime; 65 __ARCH_SI_CLOCK_T _stime; 66 } _sigchld; 67 68 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */ 69 struct { 70 void __user *_addr; /* faulting insn/memory ref. */ 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 __u32 _flags; 98 } _perf; 99 }; 100 } _sigfault; 101 102 /* SIGPOLL */ 103 struct { 104 __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 105 int _fd; 106 } _sigpoll; 107 108 /* SIGSYS */ 109 struct { 110 void __user *_call_addr; /* calling user insn */ 111 int _syscall; /* triggering system call number */ 112 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 113 } _sigsys; 114 }; 115 116 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 117 #define __SIGINFO \ 118 struct { \ 119 int si_signo; \ 120 int si_errno; \ 121 int si_code; \ 122 union __sifields _sifields; \ 123 } 124 #else 125 #define __SIGINFO \ 126 struct { \ 127 int si_signo; \ 128 int si_code; \ 129 int si_errno; \ 130 union __sifields _sifields; \ 131 } 132 #endif /* __ARCH_HAS_SWAPPED_SIGINFO */ 133 134 typedef struct siginfo { 135 union { 136 __SIGINFO; 137 int _si_pad[SI_MAX_SIZE/sizeof(int)]; 138 }; 139 } __ARCH_SI_ATTRIBUTES siginfo_t; 140 141 /* 142 * How these fields are to be accessed. 143 */ 144 #define si_pid _sifields._kill._pid 145 #define si_uid _sifields._kill._uid 146 #define si_tid _sifields._timer._tid 147 #define si_overrun _sifields._timer._overrun 148 #define si_sys_private _sifields._timer._sys_private 149 #define si_status _sifields._sigchld._status 150 #define si_utime _sifields._sigchld._utime 151 #define si_stime _sifields._sigchld._stime 152 #define si_value _sifields._rt._sigval 153 #define si_int _sifields._rt._sigval.sival_int 154 #define si_ptr _sifields._rt._sigval.sival_ptr 155 #define si_addr _sifields._sigfault._addr 156 #define si_trapno _sifields._sigfault._trapno 157 #define si_addr_lsb _sifields._sigfault._addr_lsb 158 #define si_lower _sifields._sigfault._addr_bnd._lower 159 #define si_upper _sifields._sigfault._addr_bnd._upper 160 #define si_pkey _sifields._sigfault._addr_pkey._pkey 161 #define si_perf_data _sifields._sigfault._perf._data 162 #define si_perf_type _sifields._sigfault._perf._type 163 #define si_perf_flags _sifields._sigfault._perf._flags 164 #define si_band _sifields._sigpoll._band 165 #define si_fd _sifields._sigpoll._fd 166 #define si_call_addr _sifields._sigsys._call_addr 167 #define si_syscall _sifields._sigsys._syscall 168 #define si_arch _sifields._sigsys._arch 169 170 /* 171 * si_code values 172 * Digital reserves positive values for kernel-generated signals. 173 */ 174 #define SI_USER 0 /* sent by kill, sigsend, raise */ 175 #define SI_KERNEL 0x80 /* sent by the kernel from somewhere */ 176 #define SI_QUEUE -1 /* sent by sigqueue */ 177 #define SI_TIMER -2 /* sent by timer expiration */ 178 #define SI_MESGQ -3 /* sent by real time mesq state change */ 179 #define SI_ASYNCIO -4 /* sent by AIO completion */ 180 #define SI_SIGIO -5 /* sent by queued SIGIO */ 181 #define SI_TKILL -6 /* sent by tkill system call */ 182 #define SI_DETHREAD -7 /* sent by execve() killing subsidiary threads */ 183 #define SI_ASYNCNL -60 /* sent by glibc async name lookup completion */ 184 185 #define SI_FROMUSER(siptr) ((siptr)->si_code <= 0) 186 #define SI_FROMKERNEL(siptr) ((siptr)->si_code > 0) 187 188 /* 189 * SIGILL si_codes 190 */ 191 #define ILL_ILLOPC 1 /* illegal opcode */ 192 #define ILL_ILLOPN 2 /* illegal operand */ 193 #define ILL_ILLADR 3 /* illegal addressing mode */ 194 #define ILL_ILLTRP 4 /* illegal trap */ 195 #define ILL_PRVOPC 5 /* privileged opcode */ 196 #define ILL_PRVREG 6 /* privileged register */ 197 #define ILL_COPROC 7 /* coprocessor error */ 198 #define ILL_BADSTK 8 /* internal stack error */ 199 #define ILL_BADIADDR 9 /* unimplemented instruction address */ 200 #define __ILL_BREAK 10 /* illegal break */ 201 #define __ILL_BNDMOD 11 /* bundle-update (modification) in progress */ 202 #define NSIGILL 11 203 204 /* 205 * SIGFPE si_codes 206 */ 207 #define FPE_INTDIV 1 /* integer divide by zero */ 208 #define FPE_INTOVF 2 /* integer overflow */ 209 #define FPE_FLTDIV 3 /* floating point divide by zero */ 210 #define FPE_FLTOVF 4 /* floating point overflow */ 211 #define FPE_FLTUND 5 /* floating point underflow */ 212 #define FPE_FLTRES 6 /* floating point inexact result */ 213 #define FPE_FLTINV 7 /* floating point invalid operation */ 214 #define FPE_FLTSUB 8 /* subscript out of range */ 215 #define __FPE_DECOVF 9 /* decimal overflow */ 216 #define __FPE_DECDIV 10 /* decimal division by zero */ 217 #define __FPE_DECERR 11 /* packed decimal error */ 218 #define __FPE_INVASC 12 /* invalid ASCII digit */ 219 #define __FPE_INVDEC 13 /* invalid decimal digit */ 220 #define FPE_FLTUNK 14 /* undiagnosed floating-point exception */ 221 #define FPE_CONDTRAP 15 /* trap on condition */ 222 #define NSIGFPE 15 223 224 /* 225 * SIGSEGV si_codes 226 */ 227 #define SEGV_MAPERR 1 /* address not mapped to object */ 228 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */ 229 #define SEGV_BNDERR 3 /* failed address bound checks */ 230 #ifdef __ia64__ 231 # define __SEGV_PSTKOVF 4 /* paragraph stack overflow */ 232 #else 233 # define SEGV_PKUERR 4 /* failed protection key checks */ 234 #endif 235 #define SEGV_ACCADI 5 /* ADI not enabled for mapped object */ 236 #define SEGV_ADIDERR 6 /* Disrupting MCD error */ 237 #define SEGV_ADIPERR 7 /* Precise MCD exception */ 238 #define SEGV_MTEAERR 8 /* Asynchronous ARM MTE error */ 239 #define SEGV_MTESERR 9 /* Synchronous ARM MTE exception */ 240 #define SEGV_CPERR 10 /* Control protection fault */ 241 #define NSIGSEGV 10 242 243 /* 244 * SIGBUS si_codes 245 */ 246 #define BUS_ADRALN 1 /* invalid address alignment */ 247 #define BUS_ADRERR 2 /* non-existent physical address */ 248 #define BUS_OBJERR 3 /* object specific hardware error */ 249 /* hardware memory error consumed on a machine check: action required */ 250 #define BUS_MCEERR_AR 4 251 /* hardware memory error detected in process but not consumed: action optional*/ 252 #define BUS_MCEERR_AO 5 253 #define NSIGBUS 5 254 255 /* 256 * SIGTRAP si_codes 257 */ 258 #define TRAP_BRKPT 1 /* process breakpoint */ 259 #define TRAP_TRACE 2 /* process trace trap */ 260 #define TRAP_BRANCH 3 /* process taken branch trap */ 261 #define TRAP_HWBKPT 4 /* hardware breakpoint/watchpoint */ 262 #define TRAP_UNK 5 /* undiagnosed trap */ 263 #define TRAP_PERF 6 /* perf event with sigtrap=1 */ 264 #define NSIGTRAP 6 265 266 /* 267 * There is an additional set of SIGTRAP si_codes used by ptrace 268 * that are of the form: ((PTRACE_EVENT_XXX << 8) | SIGTRAP) 269 */ 270 271 /* 272 * Flags for si_perf_flags if SIGTRAP si_code is TRAP_PERF. 273 */ 274 #define TRAP_PERF_FLAG_ASYNC (1u << 0) 275 276 /* 277 * SIGCHLD si_codes 278 */ 279 #define CLD_EXITED 1 /* child has exited */ 280 #define CLD_KILLED 2 /* child was killed */ 281 #define CLD_DUMPED 3 /* child terminated abnormally */ 282 #define CLD_TRAPPED 4 /* traced child has trapped */ 283 #define CLD_STOPPED 5 /* child has stopped */ 284 #define CLD_CONTINUED 6 /* stopped child has continued */ 285 #define NSIGCHLD 6 286 287 /* 288 * SIGPOLL (or any other signal without signal specific si_codes) si_codes 289 */ 290 #define POLL_IN 1 /* data input available */ 291 #define POLL_OUT 2 /* output buffers available */ 292 #define POLL_MSG 3 /* input message available */ 293 #define POLL_ERR 4 /* i/o error */ 294 #define POLL_PRI 5 /* high priority input available */ 295 #define POLL_HUP 6 /* device disconnected */ 296 #define NSIGPOLL 6 297 298 /* 299 * SIGSYS si_codes 300 */ 301 #define SYS_SECCOMP 1 /* seccomp triggered */ 302 #define SYS_USER_DISPATCH 2 /* syscall user dispatch triggered */ 303 #define NSIGSYS 2 304 305 /* 306 * SIGEMT si_codes 307 */ 308 #define EMT_TAGOVF 1 /* tag overflow */ 309 #define NSIGEMT 1 310 311 /* 312 * sigevent definitions 313 * 314 * It seems likely that SIGEV_THREAD will have to be handled from 315 * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the 316 * thread manager then catches and does the appropriate nonsense. 317 * However, everything is written out here so as to not get lost. 318 */ 319 #define SIGEV_SIGNAL 0 /* notify via signal */ 320 #define SIGEV_NONE 1 /* other notification: meaningless */ 321 #define SIGEV_THREAD 2 /* deliver via thread creation */ 322 #define SIGEV_THREAD_ID 4 /* deliver to thread */ 323 324 /* 325 * This works because the alignment is ok on all current architectures 326 * but we leave open this being overridden in the future 327 */ 328 #ifndef __ARCH_SIGEV_PREAMBLE_SIZE 329 #define __ARCH_SIGEV_PREAMBLE_SIZE (sizeof(int) * 2 + sizeof(sigval_t)) 330 #endif 331 332 #define SIGEV_MAX_SIZE 64 333 #define SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \ 334 / sizeof(int)) 335 336 typedef struct sigevent { 337 sigval_t sigev_value; 338 int sigev_signo; 339 int sigev_notify; 340 union { 341 int _pad[SIGEV_PAD_SIZE]; 342 int _tid; 343 344 struct { 345 void (*_function)(sigval_t); 346 void *_attribute; /* really pthread_attr_t */ 347 } _sigev_thread; 348 } _sigev_un; 349 } sigevent_t; 350 351 #define sigev_notify_function _sigev_un._sigev_thread._function 352 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute 353 #define sigev_notify_thread_id _sigev_un._tid 354 355 356 #endif /* _UAPI_ASM_GENERIC_SIGINFO_H */ 357