1 // Derived from Inferno utils/6l/obj.c and utils/6l/span.c 2 // https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6l/obj.c 3 // https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6l/span.c 4 // 5 // Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved. 6 // Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net) 7 // Portions Copyright © 1997-1999 Vita Nuova Limited 8 // Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com) 9 // Portions Copyright © 2004,2006 Bruce Ellis 10 // Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net) 11 // Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others 12 // Portions Copyright © 2009 The Go Authors. All rights reserved. 13 // 14 // Permission is hereby granted, free of charge, to any person obtaining a copy 15 // of this software and associated documentation files (the "Software"), to deal 16 // in the Software without restriction, including without limitation the rights 17 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 18 // copies of the Software, and to permit persons to whom the Software is 19 // furnished to do so, subject to the following conditions: 20 // 21 // The above copyright notice and this permission notice shall be included in 22 // all copies or substantial portions of the Software. 23 // 24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 25 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 26 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 27 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 28 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 29 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 30 // THE SOFTWARE. 31 32 package obj 33 34 /* 35 * add library to library list. 36 * srcref: src file referring to package 37 * objref: object file referring to package 38 * file: object file, e.g., /home/rsc/go/pkg/container/vector.a 39 * pkg: package import path, e.g. container/vector 40 */ 41 42 const ( 43 LOG = 5 44 ) 45 46 func mkfwd(sym *LSym) { 47 var dwn [LOG]int32 48 var cnt [LOG]int32 49 var lst [LOG]*Prog 50 51 for i := 0; i < LOG; i++ { 52 if i == 0 { 53 cnt[i] = 1 54 } else { 55 cnt[i] = LOG * cnt[i-1] 56 } 57 dwn[i] = 1 58 lst[i] = nil 59 } 60 61 i := 0 62 for p := sym.Func.Text; p != nil && p.Link != nil; p = p.Link { 63 i-- 64 if i < 0 { 65 i = LOG - 1 66 } 67 p.Forwd = nil 68 dwn[i]-- 69 if dwn[i] <= 0 { 70 dwn[i] = cnt[i] 71 if lst[i] != nil { 72 lst[i].Forwd = p 73 } 74 lst[i] = p 75 } 76 } 77 } 78 79 func Appendp(q *Prog, newprog ProgAlloc) *Prog { 80 p := newprog() 81 p.Link = q.Link 82 q.Link = p 83 p.Pos = q.Pos 84 return p 85 } 86