|  | // Copyright 2014 The Go Authors. All rights reserved. | 
|  | // Use of this source code is governed by a BSD-style | 
|  | // license that can be found in the LICENSE file. | 
|  |  | 
|  | package runtime | 
|  |  | 
|  | import "unsafe" | 
|  |  | 
|  | // Constants | 
|  | const ( | 
|  | _EINTR  = 0x4 | 
|  | _ENOMEM = 0xc | 
|  | _EAGAIN = 0xb | 
|  |  | 
|  | _PROT_NONE  = 0 | 
|  | _PROT_READ  = 0x1 | 
|  | _PROT_WRITE = 0x2 | 
|  | _PROT_EXEC  = 0x4 | 
|  |  | 
|  | _MAP_ANON    = 0x20 | 
|  | _MAP_PRIVATE = 0x2 | 
|  | _MAP_FIXED   = 0x10 | 
|  |  | 
|  | _MADV_DONTNEED   = 0x4 | 
|  | _MADV_FREE       = 0x8 | 
|  | _MADV_HUGEPAGE   = 0xe | 
|  | _MADV_NOHUGEPAGE = 0xf | 
|  | _MADV_COLLAPSE   = 0x19 | 
|  |  | 
|  | _SA_RESTART     = 0x10000000 | 
|  | _SA_ONSTACK     = 0x8000000 | 
|  | _SA_RESTORER    = 0 // unused on ARM | 
|  | _SA_SIGINFO     = 0x4 | 
|  | _SI_KERNEL      = 0x80 | 
|  | _SI_TIMER       = -0x2 | 
|  | _SIGHUP         = 0x1 | 
|  | _SIGINT         = 0x2 | 
|  | _SIGQUIT        = 0x3 | 
|  | _SIGILL         = 0x4 | 
|  | _SIGTRAP        = 0x5 | 
|  | _SIGABRT        = 0x6 | 
|  | _SIGBUS         = 0x7 | 
|  | _SIGFPE         = 0x8 | 
|  | _SIGKILL        = 0x9 | 
|  | _SIGUSR1        = 0xa | 
|  | _SIGSEGV        = 0xb | 
|  | _SIGUSR2        = 0xc | 
|  | _SIGPIPE        = 0xd | 
|  | _SIGALRM        = 0xe | 
|  | _SIGSTKFLT      = 0x10 | 
|  | _SIGCHLD        = 0x11 | 
|  | _SIGCONT        = 0x12 | 
|  | _SIGSTOP        = 0x13 | 
|  | _SIGTSTP        = 0x14 | 
|  | _SIGTTIN        = 0x15 | 
|  | _SIGTTOU        = 0x16 | 
|  | _SIGURG         = 0x17 | 
|  | _SIGXCPU        = 0x18 | 
|  | _SIGXFSZ        = 0x19 | 
|  | _SIGVTALRM      = 0x1a | 
|  | _SIGPROF        = 0x1b | 
|  | _SIGWINCH       = 0x1c | 
|  | _SIGIO          = 0x1d | 
|  | _SIGPWR         = 0x1e | 
|  | _SIGSYS         = 0x1f | 
|  | _SIGRTMIN       = 0x20 | 
|  | _FPE_INTDIV     = 0x1 | 
|  | _FPE_INTOVF     = 0x2 | 
|  | _FPE_FLTDIV     = 0x3 | 
|  | _FPE_FLTOVF     = 0x4 | 
|  | _FPE_FLTUND     = 0x5 | 
|  | _FPE_FLTRES     = 0x6 | 
|  | _FPE_FLTINV     = 0x7 | 
|  | _FPE_FLTSUB     = 0x8 | 
|  | _BUS_ADRALN     = 0x1 | 
|  | _BUS_ADRERR     = 0x2 | 
|  | _BUS_OBJERR     = 0x3 | 
|  | _SEGV_MAPERR    = 0x1 | 
|  | _SEGV_ACCERR    = 0x2 | 
|  | _ITIMER_REAL    = 0 | 
|  | _ITIMER_PROF    = 0x2 | 
|  | _ITIMER_VIRTUAL = 0x1 | 
|  | _O_RDONLY       = 0 | 
|  | _O_WRONLY       = 0x1 | 
|  | _O_CREAT        = 0x40 | 
|  | _O_TRUNC        = 0x200 | 
|  | _O_NONBLOCK     = 0x800 | 
|  | _O_CLOEXEC      = 0x80000 | 
|  |  | 
|  | _CLOCK_THREAD_CPUTIME_ID = 0x3 | 
|  |  | 
|  | _SIGEV_THREAD_ID = 0x4 | 
|  |  | 
|  | _AF_UNIX    = 0x1 | 
|  | _SOCK_DGRAM = 0x2 | 
|  | ) | 
|  |  | 
|  | type timespec struct { | 
|  | tv_sec  int32 | 
|  | tv_nsec int32 | 
|  | } | 
|  |  | 
|  | //go:nosplit | 
|  | func (ts *timespec) setNsec(ns int64) { | 
|  | ts.tv_sec = timediv(ns, 1e9, &ts.tv_nsec) | 
|  | } | 
|  |  | 
|  | type stackt struct { | 
|  | ss_sp    *byte | 
|  | ss_flags int32 | 
|  | ss_size  uintptr | 
|  | } | 
|  |  | 
|  | type sigcontext struct { | 
|  | trap_no       uint32 | 
|  | error_code    uint32 | 
|  | oldmask       uint32 | 
|  | r0            uint32 | 
|  | r1            uint32 | 
|  | r2            uint32 | 
|  | r3            uint32 | 
|  | r4            uint32 | 
|  | r5            uint32 | 
|  | r6            uint32 | 
|  | r7            uint32 | 
|  | r8            uint32 | 
|  | r9            uint32 | 
|  | r10           uint32 | 
|  | fp            uint32 | 
|  | ip            uint32 | 
|  | sp            uint32 | 
|  | lr            uint32 | 
|  | pc            uint32 | 
|  | cpsr          uint32 | 
|  | fault_address uint32 | 
|  | } | 
|  |  | 
|  | type ucontext struct { | 
|  | uc_flags    uint32 | 
|  | uc_link     *ucontext | 
|  | uc_stack    stackt | 
|  | uc_mcontext sigcontext | 
|  | uc_sigmask  uint32 | 
|  | __unused    [31]int32 | 
|  | uc_regspace [128]uint32 | 
|  | } | 
|  |  | 
|  | type timeval struct { | 
|  | tv_sec  int32 | 
|  | tv_usec int32 | 
|  | } | 
|  |  | 
|  | func (tv *timeval) set_usec(x int32) { | 
|  | tv.tv_usec = x | 
|  | } | 
|  |  | 
|  | type itimerspec struct { | 
|  | it_interval timespec | 
|  | it_value    timespec | 
|  | } | 
|  |  | 
|  | type itimerval struct { | 
|  | it_interval timeval | 
|  | it_value    timeval | 
|  | } | 
|  |  | 
|  | type sigeventFields struct { | 
|  | value  uintptr | 
|  | signo  int32 | 
|  | notify int32 | 
|  | // below here is a union; sigev_notify_thread_id is the only field we use | 
|  | sigev_notify_thread_id int32 | 
|  | } | 
|  |  | 
|  | type sigevent struct { | 
|  | sigeventFields | 
|  |  | 
|  | // Pad struct to the max size in the kernel. | 
|  | _ [_sigev_max_size - unsafe.Sizeof(sigeventFields{})]byte | 
|  | } | 
|  |  | 
|  | type siginfoFields struct { | 
|  | si_signo int32 | 
|  | si_errno int32 | 
|  | si_code  int32 | 
|  | // below here is a union; si_addr is the only field we use | 
|  | si_addr uint32 | 
|  | } | 
|  |  | 
|  | type siginfo struct { | 
|  | siginfoFields | 
|  |  | 
|  | // Pad struct to the max size in the kernel. | 
|  | _ [_si_max_size - unsafe.Sizeof(siginfoFields{})]byte | 
|  | } | 
|  |  | 
|  | type sigactiont struct { | 
|  | sa_handler  uintptr | 
|  | sa_flags    uint32 | 
|  | sa_restorer uintptr | 
|  | sa_mask     uint64 | 
|  | } | 
|  |  | 
|  | type sockaddr_un struct { | 
|  | family uint16 | 
|  | path   [108]byte | 
|  | } |