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405a280d01
There were only two versions, 0 and 1, and the only user of version 1 was the assembler, to indicate that a symbol was static. Rename LSym.Version to Static, and add it to LSym.Attributes. Simplify call-sites. Passes toolstash-check. Change-Id: Iabd39918f5019cce78f381d13f0481ae09f3871f Reviewed-on: https://go-review.googlesource.com/41201 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
124 lines
3.9 KiB
Go
124 lines
3.9 KiB
Go
// Derived from Inferno utils/6l/obj.c and utils/6l/span.c
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// https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6l/obj.c
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// https://bitbucket.org/inferno-os/inferno-os/src/default/utils/6l/span.c
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//
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// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
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// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
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// Portions Copyright © 1997-1999 Vita Nuova Limited
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// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
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// Portions Copyright © 2004,2006 Bruce Ellis
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// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
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// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
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// Portions Copyright © 2009 The Go Authors. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package obj
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import (
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"cmd/internal/objabi"
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"fmt"
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"log"
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"math"
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)
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func Linknew(arch *LinkArch) *Link {
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ctxt := new(Link)
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ctxt.hash = make(map[string]*LSym)
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ctxt.statichash = make(map[string]*LSym)
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ctxt.Arch = arch
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ctxt.Pathname = objabi.WorkingDir()
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ctxt.Headtype.Set(objabi.GOOS)
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if ctxt.Headtype < 0 {
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log.Fatalf("unknown goos %s", objabi.GOOS)
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}
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ctxt.Flag_optimize = true
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ctxt.Framepointer_enabled = objabi.Framepointer_enabled(objabi.GOOS, arch.Name)
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return ctxt
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}
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// LookupDerived looks up or creates the symbol with name name derived from symbol s.
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// The resulting symbol will be static iff s is.
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func (ctxt *Link) LookupDerived(s *LSym, name string) *LSym {
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if s.Static() {
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return ctxt.LookupStatic(name)
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}
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return ctxt.Lookup(name)
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}
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// LookupStatic looks up the static symbol with name name.
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// If it does not exist, it creates it.
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func (ctxt *Link) LookupStatic(name string) *LSym {
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s := ctxt.statichash[name]
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if s == nil {
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s = &LSym{Name: name, Attribute: AttrStatic}
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ctxt.statichash[name] = s
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}
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return s
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}
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// Lookup looks up the symbol with name name.
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// If it does not exist, it creates it.
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func (ctxt *Link) Lookup(name string) *LSym {
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return ctxt.LookupInit(name, nil)
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}
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// LookupInit looks up the symbol with name name.
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// If it does not exist, it creates it and
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// passes it to init for one-time initialization.
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func (ctxt *Link) LookupInit(name string, init func(s *LSym)) *LSym {
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s := ctxt.hash[name]
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if s == nil {
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s = &LSym{Name: name}
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ctxt.hash[name] = s
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if init != nil {
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init(s)
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}
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}
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return s
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}
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func (ctxt *Link) Float32Sym(f float32) *LSym {
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i := math.Float32bits(f)
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name := fmt.Sprintf("$f32.%08x", i)
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return ctxt.LookupInit(name, func(s *LSym) {
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s.Size = 4
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s.Set(AttrLocal, true)
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})
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}
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func (ctxt *Link) Float64Sym(f float64) *LSym {
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i := math.Float64bits(f)
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name := fmt.Sprintf("$f64.%016x", i)
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return ctxt.LookupInit(name, func(s *LSym) {
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s.Size = 8
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s.Set(AttrLocal, true)
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})
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}
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func (ctxt *Link) Int64Sym(i int64) *LSym {
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name := fmt.Sprintf("$i64.%016x", uint64(i))
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return ctxt.LookupInit(name, func(s *LSym) {
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s.Size = 8
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s.Set(AttrLocal, true)
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})
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}
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