mirror of
https://github.com/golang/go
synced 2024-11-19 13:04:45 -07:00
23aad448b1
On systems that use kqueue, we always register descriptors for both EVFILT_READ and EVFILT_WRITE. On at least FreeBSD and OpenBSD, when the write end of a pipe is registered for EVFILT_READ and EVFILT_WRITE events, and the read end of the pipe is closed, kqueue reports an EVFILT_READ event with EV_EOF set, but does not report an EVFILT_WRITE event. Since the write to the pipe is waiting for an EVFILT_WRITE event, closing the read end of a pipe can cause the write end to hang rather than attempt another write which will fail with EPIPE. Fix this by treating EVFILT_READ with EV_EOF set as making both reads and writes ready to proceed. The real test for this is in CL 71770, which tests using various timeouts with pipes. Updates #22114 Change-Id: Ib23fbaaddbccd8eee77bdf18f27a7f0aa50e2742 Reviewed-on: https://go-review.googlesource.com/71973 Reviewed-by: Matthew Dempsky <mdempsky@google.com>
253 lines
4.5 KiB
Go
253 lines
4.5 KiB
Go
// Note: cgo can't handle some Darwin/ARM structures, so this file can't
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// be auto generated by cgo yet.
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// Created based on output of `cgo -cdefs defs_darwin.go` and Darwin/ARM
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// specific header (mainly mcontext and ucontext related stuff)
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package runtime
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import "unsafe"
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const (
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_EINTR = 0x4
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_EFAULT = 0xe
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_PROT_NONE = 0x0
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_PROT_READ = 0x1
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_PROT_WRITE = 0x2
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_PROT_EXEC = 0x4
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_MAP_ANON = 0x1000
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_MAP_PRIVATE = 0x2
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_MAP_FIXED = 0x10
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_MADV_DONTNEED = 0x4
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_MADV_FREE = 0x5
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_MACH_MSG_TYPE_MOVE_RECEIVE = 0x10
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_MACH_MSG_TYPE_MOVE_SEND = 0x11
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_MACH_MSG_TYPE_MOVE_SEND_ONCE = 0x12
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_MACH_MSG_TYPE_COPY_SEND = 0x13
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_MACH_MSG_TYPE_MAKE_SEND = 0x14
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_MACH_MSG_TYPE_MAKE_SEND_ONCE = 0x15
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_MACH_MSG_TYPE_COPY_RECEIVE = 0x16
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_MACH_MSG_PORT_DESCRIPTOR = 0x0
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_MACH_MSG_OOL_DESCRIPTOR = 0x1
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_MACH_MSG_OOL_PORTS_DESCRIPTOR = 0x2
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_MACH_MSG_OOL_VOLATILE_DESCRIPTOR = 0x3
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_MACH_MSGH_BITS_COMPLEX = 0x80000000
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_MACH_SEND_MSG = 0x1
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_MACH_RCV_MSG = 0x2
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_MACH_RCV_LARGE = 0x4
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_MACH_SEND_TIMEOUT = 0x10
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_MACH_SEND_INTERRUPT = 0x40
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_MACH_SEND_ALWAYS = 0x10000
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_MACH_SEND_TRAILER = 0x20000
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_MACH_RCV_TIMEOUT = 0x100
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_MACH_RCV_NOTIFY = 0x200
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_MACH_RCV_INTERRUPT = 0x400
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_MACH_RCV_OVERWRITE = 0x1000
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_NDR_PROTOCOL_2_0 = 0x0
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_NDR_INT_BIG_ENDIAN = 0x0
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_NDR_INT_LITTLE_ENDIAN = 0x1
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_NDR_FLOAT_IEEE = 0x0
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_NDR_CHAR_ASCII = 0x0
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_SA_SIGINFO = 0x40
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_SA_RESTART = 0x2
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_SA_ONSTACK = 0x1
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_SA_USERTRAMP = 0x100
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_SA_64REGSET = 0x200
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_SIGHUP = 0x1
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_SIGINT = 0x2
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_SIGQUIT = 0x3
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_SIGILL = 0x4
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_SIGTRAP = 0x5
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_SIGABRT = 0x6
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_SIGEMT = 0x7
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_SIGFPE = 0x8
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_SIGKILL = 0x9
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_SIGBUS = 0xa
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_SIGSEGV = 0xb
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_SIGSYS = 0xc
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_SIGPIPE = 0xd
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_SIGALRM = 0xe
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_SIGTERM = 0xf
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_SIGURG = 0x10
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_SIGSTOP = 0x11
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_SIGTSTP = 0x12
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_SIGCONT = 0x13
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_SIGCHLD = 0x14
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_SIGTTIN = 0x15
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_SIGTTOU = 0x16
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_SIGIO = 0x17
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_SIGXCPU = 0x18
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_SIGXFSZ = 0x19
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_SIGVTALRM = 0x1a
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_SIGPROF = 0x1b
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_SIGWINCH = 0x1c
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_SIGINFO = 0x1d
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_SIGUSR1 = 0x1e
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_SIGUSR2 = 0x1f
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_FPE_INTDIV = 0x7
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_FPE_INTOVF = 0x8
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_FPE_FLTDIV = 0x1
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_FPE_FLTOVF = 0x2
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_FPE_FLTUND = 0x3
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_FPE_FLTRES = 0x4
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_FPE_FLTINV = 0x5
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_FPE_FLTSUB = 0x6
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_BUS_ADRALN = 0x1
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_BUS_ADRERR = 0x2
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_BUS_OBJERR = 0x3
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_SEGV_MAPERR = 0x1
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_SEGV_ACCERR = 0x2
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_ITIMER_REAL = 0x0
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_ITIMER_VIRTUAL = 0x1
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_ITIMER_PROF = 0x2
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_EV_ADD = 0x1
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_EV_DELETE = 0x2
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_EV_CLEAR = 0x20
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_EV_RECEIPT = 0x40
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_EV_ERROR = 0x4000
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_EV_EOF = 0x8000
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_EVFILT_READ = -0x1
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_EVFILT_WRITE = -0x2
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)
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type machbody struct {
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msgh_descriptor_count uint32
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}
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type machheader struct {
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msgh_bits uint32
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msgh_size uint32
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msgh_remote_port uint32
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msgh_local_port uint32
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msgh_reserved uint32
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msgh_id int32
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}
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type machndr struct {
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mig_vers uint8
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if_vers uint8
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reserved1 uint8
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mig_encoding uint8
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int_rep uint8
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char_rep uint8
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float_rep uint8
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reserved2 uint8
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}
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type machport struct {
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name uint32
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pad1 uint32
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pad2 uint16
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disposition uint8
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_type uint8
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}
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type stackt struct {
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ss_sp *byte
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ss_size uintptr
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ss_flags int32
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}
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type sigactiont struct {
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__sigaction_u [4]byte
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sa_tramp unsafe.Pointer
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sa_mask uint32
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sa_flags int32
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}
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type usigactiont struct {
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__sigaction_u [4]byte
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sa_mask uint32
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sa_flags int32
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}
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type siginfo struct {
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si_signo int32
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si_errno int32
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si_code int32
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si_pid int32
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si_uid uint32
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si_status int32
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si_addr uint32
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si_value [4]byte
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si_band int32
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__pad [7]uint32
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}
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type timeval struct {
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tv_sec int32
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tv_usec int32
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}
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func (tv *timeval) set_usec(x int32) {
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tv.tv_usec = x
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}
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type itimerval struct {
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it_interval timeval
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it_value timeval
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}
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type timespec struct {
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tv_sec int32
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tv_nsec int32
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}
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type floatstate32 struct {
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r [32]uint32
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fpscr uint32
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}
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type regs32 struct {
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r [13]uint32 // r0 to r12
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sp uint32 // r13
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lr uint32 // r14
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pc uint32 // r15
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cpsr uint32
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}
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type exceptionstate32 struct {
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trapno uint32 // NOTE: on 386, the trapno field is split into trapno and cpu
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err uint32
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faultvaddr uint32
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}
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type mcontext32 struct {
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es exceptionstate32
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ss regs32
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fs floatstate32
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}
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type ucontext struct {
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uc_onstack int32
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uc_sigmask uint32
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uc_stack stackt
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uc_link *ucontext
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uc_mcsize uint32
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uc_mcontext *mcontext32
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}
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type keventt struct {
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ident uint32
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filter int16
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flags uint16
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fflags uint32
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data int32
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udata *byte
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}
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