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Source file src/cmd/internal/obj/ld.go

Documentation: cmd/internal/obj

  // Derived from Inferno utils/6l/obj.c and utils/6l/span.c
  // https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6l/obj.c
  // https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6l/span.c
  //
  //	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
  //	Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
  //	Portions Copyright © 1997-1999 Vita Nuova Limited
  //	Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
  //	Portions Copyright © 2004,2006 Bruce Ellis
  //	Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
  //	Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
  //	Portions Copyright © 2009 The Go Authors. All rights reserved.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  
  package obj
  
  /*
   * add library to library list.
   *	srcref: src file referring to package
   *	objref: object file referring to package
   *	file: object file, e.g., /home/rsc/go/pkg/container/vector.a
   *	pkg: package import path, e.g. container/vector
   */
  
  const (
  	LOG = 5
  )
  
  func mkfwd(sym *LSym) {
  	var dwn [LOG]int32
  	var cnt [LOG]int32
  	var lst [LOG]*Prog
  
  	for i := 0; i < LOG; i++ {
  		if i == 0 {
  			cnt[i] = 1
  		} else {
  			cnt[i] = LOG * cnt[i-1]
  		}
  		dwn[i] = 1
  		lst[i] = nil
  	}
  
  	i := 0
  	for p := sym.Func.Text; p != nil && p.Link != nil; p = p.Link {
  		i--
  		if i < 0 {
  			i = LOG - 1
  		}
  		p.Forwd = nil
  		dwn[i]--
  		if dwn[i] <= 0 {
  			dwn[i] = cnt[i]
  			if lst[i] != nil {
  				lst[i].Forwd = p
  			}
  			lst[i] = p
  		}
  	}
  }
  
  func Appendp(q *Prog, newprog ProgAlloc) *Prog {
  	p := newprog()
  	p.Link = q.Link
  	q.Link = p
  	p.Pos = q.Pos
  	return p
  }
  

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