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Source file src/runtime/sys_x86.go

     1	// Copyright 2013 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	// +build amd64 amd64p32 386
     6	
     7	package runtime
     8	
     9	import (
    10		"runtime/internal/sys"
    11		"unsafe"
    12	)
    13	
    14	// adjust Gobuf as it if executed a call to fn with context ctxt
    15	// and then did an immediate gosave.
    16	func gostartcall(buf *gobuf, fn, ctxt unsafe.Pointer) {
    17		sp := buf.sp
    18		if sys.RegSize > sys.PtrSize {
    19			sp -= sys.PtrSize
    20			*(*uintptr)(unsafe.Pointer(sp)) = 0
    21		}
    22		sp -= sys.PtrSize
    23		*(*uintptr)(unsafe.Pointer(sp)) = buf.pc
    24		buf.sp = sp
    25		buf.pc = uintptr(fn)
    26		buf.ctxt = ctxt
    27	}
    28	

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