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  //go:build amd64 || 386
     6  // +build amd64 386
     7  
     8  package runtime
     9  
    10  import (
    11  	"runtime/internal/sys"
    12  	"unsafe"
    13  )
    14  
    15  // adjust Gobuf as if it executed a call to fn with context ctxt
    16  // and then stopped before the first instruction in fn.
    17  func gostartcall(buf *gobuf, fn, ctxt unsafe.Pointer) {
    18  	sp := buf.sp
    19  	sp -= sys.PtrSize
    20  	*(*uintptr)(unsafe.Pointer(sp)) = buf.pc
    21  	buf.sp = sp
    22  	buf.pc = uintptr(fn)
    23  	buf.ctxt = ctxt
    24  }
    25
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