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Source file src/runtime/sys_x86.go

Documentation: runtime

     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 if it 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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