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 to be passed to user */ 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 #ifdef __ia64__ 72 int _imm; /* immediate value for "break" */ 73 unsigned int _flags; /* see ia64 si_flags */ 74 unsigned long _isr; /* isr */ 75 #endif 76 77 #define __ADDR_BND_PKEY_PAD (__alignof__(void *) < sizeof(short) ? \ 78 sizeof(short) : __alignof__(void *)) 79 union { 80 /* used on alpha and sparc */ 81 int _trapno; /* TRAP # which caused the signal */ 82 /* 83 * used when si_code=BUS_MCEERR_AR or 84 * used when si_code=BUS_MCEERR_AO 85 */ 86 short _addr_lsb; /* LSB of the reported address */ 87 /* used when si_code=SEGV_BNDERR */ 88 struct { 89 char _dummy_bnd[__ADDR_BND_PKEY_PAD]; 90 void __user *_lower; 91 void __user *_upper; 92 } _addr_bnd; 93 /* used when si_code=SEGV_PKUERR */ 94 struct { 95 char _dummy_pkey[__ADDR_BND_PKEY_PAD]; 96 __u32 _pkey; 97 } _addr_pkey; 98 /* used when si_code=TRAP_PERF */ 99 struct { 100 unsigned long _data; 101 __u32 _type; 102 __u32 _flags; 103 } _perf; 104 }; 105 } _sigfault; 106 107 /* SIGPOLL */ 108 struct { 109 __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */ 110 int _fd; 111 } _sigpoll; 112 113 /* SIGSYS */ 114 struct { 115 void __user *_call_addr; /* calling user insn */ 116 int _syscall; /* triggering system call number */ 117 unsigned int _arch; /* AUDIT_ARCH_* of syscall */ 118 } _sigsys; 119 }; 120 121 #ifndef __ARCH_HAS_SWAPPED_SIGINFO 122 #define __SIGINFO \ 123 struct { \ 124 int si_signo; \ 125 int si_errno; \ 126 int si_code; \ 127 union __sifields _sifields; \ 128 } 129 #else 130 #define __SIGINFO \ 131 struct { \ 132 int si_signo; \ 133 int si_code; \ 134 int si_errno; \ 135 union __sifields _sifields; \ 136 } 137 #endif /* __ARCH_HAS_SWAPPED_SIGINFO */ 138 139 typedef struct siginfo { 140 union { 141 __SIGINFO; 142 int _si_pad[SI_MAX_SIZE/sizeof(int)]; 143 }; 144 } __ARCH_SI_ATTRIBUTES siginfo_t; 145 146 /* 147 * How these fields are to be accessed. 148 */ 149 #define si_pid _sifields._kill._pid 150 #define si_uid _sifields._kill._uid 151 #define si_tid _sifields._timer._tid 152 #define si_overrun _sifields._timer._overrun 153 #define si_sys_private _sifields._timer._sys_private 154 #define si_status _sifields._sigchld._status 155 #define si_utime _sifields._sigchld._utime 156 #define si_stime _sifields._sigchld._stime 157 #define si_value _sifields._rt._sigval 158 #define si_int _sifields._rt._sigval.sival_int 159 #define si_ptr _sifields._rt._sigval.sival_ptr 160 #define si_addr _sifields._sigfault._addr 161 #define si_trapno _sifields._sigfault._trapno 162 #define si_addr_lsb _sifields._sigfault._addr_lsb 163 #define si_lower _sifields._sigfault._addr_bnd._lower 164 #define si_upper _sifields._sigfault._addr_bnd._upper 165 #define si_pkey _sifields._sigfault._addr_pkey._pkey 166 #define si_perf_data _sifields._sigfault._perf._data 167 #define si_perf_type _sifields._sigfault._perf._type 168 #define si_perf_flags _sifields._sigfault._perf._flags 169 #define si_band _sifields._sigpoll._band 170 #define si_fd _sifields._sigpoll._fd 171 #define si_call_addr _sifields._sigsys._call_addr 172 #define si_syscall _sifields._sigsys._syscall 173 #define si_arch _sifields._sigsys._arch 174 175 /* 176 * si_code values 177 * Digital reserves positive values for kernel-generated signals. 178 */ 179 #define SI_USER 0 /* sent by kill, sigsend, raise */ 180 #define SI_KERNEL 0x80 /* sent by the kernel from somewhere */ 181 #define SI_QUEUE -1 /* sent by sigqueue */ 182 #define SI_TIMER -2 /* sent by timer expiration */ 183 #define SI_MESGQ -3 /* sent by real time mesq state change */ 184 #define SI_ASYNCIO -4 /* sent by AIO completion */ 185 #define SI_SIGIO -5 /* sent by queued SIGIO */ 186 #define SI_TKILL -6 /* sent by tkill system call */ 187 #define SI_DETHREAD -7 /* sent by execve() killing subsidiary threads */ 188 #define SI_ASYNCNL -60 /* sent by glibc async name lookup completion */ 189 190 #define SI_FROMUSER(siptr) ((siptr)->si_code <= 0) 191 #define SI_FROMKERNEL(siptr) ((siptr)->si_code > 0) 192 193 /* 194 * SIGILL si_codes 195 */ 196 #define ILL_ILLOPC 1 /* illegal opcode */ 197 #define ILL_ILLOPN 2 /* illegal operand */ 198 #define ILL_ILLADR 3 /* illegal addressing mode */ 199 #define ILL_ILLTRP 4 /* illegal trap */ 200 #define ILL_PRVOPC 5 /* privileged opcode */ 201 #define ILL_PRVREG 6 /* privileged register */ 202 #define ILL_COPROC 7 /* coprocessor error */ 203 #define ILL_BADSTK 8 /* internal stack error */ 204 #define ILL_BADIADDR 9 /* unimplemented instruction address */ 205 #define __ILL_BREAK 10 /* illegal break */ 206 #define __ILL_BNDMOD 11 /* bundle-update (modification) in progress */ 207 #define NSIGILL 11 208 209 /* 210 * SIGFPE si_codes 211 */ 212 #define FPE_INTDIV 1 /* integer divide by zero */ 213 #define FPE_INTOVF 2 /* integer overflow */ 214 #define FPE_FLTDIV 3 /* floating point divide by zero */ 215 #define FPE_FLTOVF 4 /* floating point overflow */ 216 #define FPE_FLTUND 5 /* floating point underflow */ 217 #define FPE_FLTRES 6 /* floating point inexact result */ 218 #define FPE_FLTINV 7 /* floating point invalid operation */ 219 #define FPE_FLTSUB 8 /* subscript out of range */ 220 #define __FPE_DECOVF 9 /* decimal overflow */ 221 #define __FPE_DECDIV 10 /* decimal division by zero */ 222 #define __FPE_DECERR 11 /* packed decimal error */ 223 #define __FPE_INVASC 12 /* invalid ASCII digit */ 224 #define __FPE_INVDEC 13 /* invalid decimal digit */ 225 #define FPE_FLTUNK 14 /* undiagnosed floating-point exception */ 226 #define FPE_CONDTRAP 15 /* trap on condition */ 227 #define NSIGFPE 15 228 229 /* 230 * SIGSEGV si_codes 231 */ 232 #define SEGV_MAPERR 1 /* address not mapped to object */ 233 #define SEGV_ACCERR 2 /* invalid permissions for mapped object */ 234 #define SEGV_BNDERR 3 /* failed address bound checks */ 235 #ifdef __ia64__ 236 # define __SEGV_PSTKOVF 4 /* paragraph stack overflow */ 237 #else 238 # define SEGV_PKUERR 4 /* failed protection key checks */ 239 #endif 240 #define SEGV_ACCADI 5 /* ADI not enabled for mapped object */ 241 #define SEGV_ADIDERR 6 /* Disrupting MCD error */ 242 #define SEGV_ADIPERR 7 /* Precise MCD exception */ 243 #define SEGV_MTEAERR 8 /* Asynchronous ARM MTE error */ 244 #define SEGV_MTESERR 9 /* Synchronous ARM MTE exception */ 245 #define SEGV_CPERR 10 /* Control protection fault */ 246 #define NSIGSEGV 10 247 248 /* 249 * SIGBUS si_codes 250 */ 251 #define BUS_ADRALN 1 /* invalid address alignment */ 252 #define BUS_ADRERR 2 /* non-existent physical address */ 253 #define BUS_OBJERR 3 /* object specific hardware error */ 254 /* hardware memory error consumed on a machine check: action required */ 255 #define BUS_MCEERR_AR 4 256 /* hardware memory error detected in process but not consumed: action optional*/ 257 #define BUS_MCEERR_AO 5 258 #define NSIGBUS 5 259 260 /* 261 * SIGTRAP si_codes 262 */ 263 #define TRAP_BRKPT 1 /* process breakpoint */ 264 #define TRAP_TRACE 2 /* process trace trap */ 265 #define TRAP_BRANCH 3 /* process taken branch trap */ 266 #define TRAP_HWBKPT 4 /* hardware breakpoint/watchpoint */ 267 #define TRAP_UNK 5 /* undiagnosed trap */ 268 #define TRAP_PERF 6 /* perf event with sigtrap=1 */ 269 #define NSIGTRAP 6 270 271 /* 272 * There is an additional set of SIGTRAP si_codes used by ptrace 273 * that are of the form: ((PTRACE_EVENT_XXX << 8) | SIGTRAP) 274 */ 275 276 /* 277 * Flags for si_perf_flags if SIGTRAP si_code is TRAP_PERF. 278 */ 279 #define TRAP_PERF_FLAG_ASYNC (1u << 0) 280 281 /* 282 * SIGCHLD si_codes 283 */ 284 #define CLD_EXITED 1 /* child has exited */ 285 #define CLD_KILLED 2 /* child was killed */ 286 #define CLD_DUMPED 3 /* child terminated abnormally */ 287 #define CLD_TRAPPED 4 /* traced child has trapped */ 288 #define CLD_STOPPED 5 /* child has stopped */ 289 #define CLD_CONTINUED 6 /* stopped child has continued */ 290 #define NSIGCHLD 6 291 292 /* 293 * SIGPOLL (or any other signal without signal specific si_codes) si_codes 294 */ 295 #define POLL_IN 1 /* data input available */ 296 #define POLL_OUT 2 /* output buffers available */ 297 #define POLL_MSG 3 /* input message available */ 298 #define POLL_ERR 4 /* i/o error */ 299 #define POLL_PRI 5 /* high priority input available */ 300 #define POLL_HUP 6 /* device disconnected */ 301 #define NSIGPOLL 6 302 303 /* 304 * SIGSYS si_codes 305 */ 306 #define SYS_SECCOMP 1 /* seccomp triggered */ 307 #define SYS_USER_DISPATCH 2 /* syscall user dispatch triggered */ 308 #define NSIGSYS 2 309 310 /* 311 * SIGEMT si_codes 312 */ 313 #define EMT_TAGOVF 1 /* tag overflow */ 314 #define NSIGEMT 1 315 316 /* 317 * sigevent definitions 318 * 319 * It seems likely that SIGEV_THREAD will have to be handled from 320 * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the 321 * thread manager then catches and does the appropriate nonsense. 322 * However, everything is written out here so as to not get lost. 323 */ 324 #define SIGEV_SIGNAL 0 /* notify via signal */ 325 #define SIGEV_NONE 1 /* other notification: meaningless */ 326 #define SIGEV_THREAD 2 /* deliver via thread creation */ 327 #define SIGEV_THREAD_ID 4 /* deliver to thread */ 328 329 /* 330 * This works because the alignment is ok on all current architectures 331 * but we leave open this being overridden in the future 332 */ 333 #ifndef __ARCH_SIGEV_PREAMBLE_SIZE 334 #define __ARCH_SIGEV_PREAMBLE_SIZE (sizeof(int) * 2 + sizeof(sigval_t)) 335 #endif 336 337 #define SIGEV_MAX_SIZE 64 338 #define SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE - __ARCH_SIGEV_PREAMBLE_SIZE) \ 339 / sizeof(int)) 340 341 typedef struct sigevent { 342 sigval_t sigev_value; 343 int sigev_signo; 344 int sigev_notify; 345 union { 346 int _pad[SIGEV_PAD_SIZE]; 347 int _tid; 348 349 struct { 350 void (*_function)(sigval_t); 351 void *_attribute; /* really pthread_attr_t */ 352 } _sigev_thread; 353 } _sigev_un; 354 } sigevent_t; 355 356 #define sigev_notify_function _sigev_un._sigev_thread._function 357 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute 358 #define sigev_notify_thread_id _sigev_un._tid 359 360 361 #endif /* _UAPI_ASM_GENERIC_SIGINFO_H */ 362