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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2#ifndef _UAPI_ASM_GENERIC_SIGINFO_H3#define _UAPI_ASM_GENERIC_SIGINFO_H4 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 12814 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_T21#define __ARCH_SI_BAND_T long22#endif23 24#ifndef __ARCH_SI_CLOCK_T25#define __ARCH_SI_CLOCK_T __kernel_clock_t26#endif27 28#ifndef __ARCH_SI_ATTRIBUTES29#define __ARCH_SI_ATTRIBUTES30#endif31 32/*33 * Be careful when extending this union. On 32bit siginfo_t is 32bit34 * aligned. Which means that a 64bit field or any other field that35 * 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 or79 * used when si_code=BUS_MCEERR_AO80 */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_SIGINFO117#define __SIGINFO \118struct { \119 int si_signo; \120 int si_errno; \121 int si_code; \122 union __sifields _sifields; \123}124#else125#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._pid145#define si_uid _sifields._kill._uid146#define si_tid _sifields._timer._tid147#define si_overrun _sifields._timer._overrun148#define si_sys_private _sifields._timer._sys_private149#define si_status _sifields._sigchld._status150#define si_utime _sifields._sigchld._utime151#define si_stime _sifields._sigchld._stime152#define si_value _sifields._rt._sigval153#define si_int _sifields._rt._sigval.sival_int154#define si_ptr _sifields._rt._sigval.sival_ptr155#define si_addr _sifields._sigfault._addr156#define si_trapno _sifields._sigfault._trapno157#define si_addr_lsb _sifields._sigfault._addr_lsb158#define si_lower _sifields._sigfault._addr_bnd._lower159#define si_upper _sifields._sigfault._addr_bnd._upper160#define si_pkey _sifields._sigfault._addr_pkey._pkey161#define si_perf_data _sifields._sigfault._perf._data162#define si_perf_type _sifields._sigfault._perf._type163#define si_perf_flags _sifields._sigfault._perf._flags164#define si_band _sifields._sigpoll._band165#define si_fd _sifields._sigpoll._fd166#define si_call_addr _sifields._sigsys._call_addr167#define si_syscall _sifields._sigsys._syscall168#define si_arch _sifields._sigsys._arch169 170/*171 * si_code values172 * 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_codes190 */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 11203 204/*205 * SIGFPE si_codes206 */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 15223 224/*225 * SIGSEGV si_codes226 */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#else233# define SEGV_PKUERR 4 /* failed protection key checks */234#endif235#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 10242 243/*244 * SIGBUS si_codes245 */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 4251/* hardware memory error detected in process but not consumed: action optional*/252#define BUS_MCEERR_AO 5253#define NSIGBUS 5254 255/*256 * SIGTRAP si_codes257 */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 6265 266/*267 * There is an additional set of SIGTRAP si_codes used by ptrace268 * 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_codes278 */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 6286 287/*288 * SIGPOLL (or any other signal without signal specific si_codes) si_codes289 */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 6297 298/*299 * SIGSYS si_codes300 */301#define SYS_SECCOMP 1 /* seccomp triggered */302#define SYS_USER_DISPATCH 2 /* syscall user dispatch triggered */303#define NSIGSYS 2304 305/*306 * SIGEMT si_codes307 */308#define EMT_TAGOVF 1 /* tag overflow */309#define NSIGEMT 1310 311/*312 * sigevent definitions313 * 314 * It seems likely that SIGEV_THREAD will have to be handled from 315 * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the316 * 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 architectures326 * but we leave open this being overridden in the future327 */328#ifndef __ARCH_SIGEV_PREAMBLE_SIZE329#define __ARCH_SIGEV_PREAMBLE_SIZE (sizeof(int) * 2 + sizeof(sigval_t))330#endif331 332#define SIGEV_MAX_SIZE 64333#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._function352#define sigev_notify_attributes _sigev_un._sigev_thread._attribute353#define sigev_notify_thread_id _sigev_un._tid354 355 356#endif /* _UAPI_ASM_GENERIC_SIGINFO_H */357