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 8typedef 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 */ 37union __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 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 \ 118struct { \ 119 int si_signo; \ 120 int si_errno; \ 121 int si_code; \ 122 union __sifields _sifields; \ 123} 124#else 125#define __SIGINFO \ 126struct { \ 127 int si_signo; \ 128 int si_code; \ 129 int si_errno; \ 130 union __sifields _sifields; \ 131} 132#endif /* __ARCH_HAS_SWAPPED_SIGINFO */ 133 134typedef 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 336typedef 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