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[dev.cc] cmd/internal/obj: convert liblink C to Go
This CL adds the real cmd/internal/obj packages. Collectively they correspond to the liblink library. The conversion was done using rsc.io/c2go's run script at rsc.io/c2go repo version 706fac7. This is not the final conversion, just the first working draft. There will be more updates, but this works well enough to use with go tool objwriter and pass all.bash. Change-Id: I9359e835425f995a392bb2fcdbebf29511477bed Reviewed-on: https://go-review.googlesource.com/3046 Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Russ Cox
parent
db52315c88
commit
d6f6e420fc
40 changed files with 27998 additions and 7 deletions
292
src/cmd/internal/obj/data.go
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292
src/cmd/internal/obj/data.go
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// Derived from Inferno utils/6l/obj.c and utils/6l/span.c
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// http://code.google.com/p/inferno-os/source/browse/utils/6l/obj.c
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// http://code.google.com/p/inferno-os/source/browse/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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"log"
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"math"
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)
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func mangle(file string) {
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log.Fatalf("%s: mangled input file", file)
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}
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func Symgrow(ctxt *Link, s *LSym, lsiz int64) {
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var siz int
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siz = int(lsiz)
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if int64(siz) != lsiz {
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log.Fatal("Symgrow size %d too long", lsiz)
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}
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if len(s.P) >= siz {
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return
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}
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for cap(s.P) < siz {
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s.P = append(s.P[:cap(s.P)], 0)
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}
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s.P = s.P[:siz]
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}
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func savedata(ctxt *Link, s *LSym, p *Prog, pn string) {
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off := int32(p.From.Offset)
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siz := int32(ctxt.Arch.Datasize(p))
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if off < 0 || siz < 0 || off >= 1<<30 || siz >= 100 {
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mangle(pn)
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}
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if ctxt.Enforce_data_order != 0 && off < int32(len(s.P)) {
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ctxt.Diag("data out of order (already have %d)\n%P", len(s.P), p)
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}
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Symgrow(ctxt, s, int64(off+siz))
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switch int(p.To.Type_) {
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default:
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ctxt.Diag("bad data: %P", p)
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case ctxt.Arch.D_FCONST:
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switch siz {
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default:
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ctxt.Diag("unexpected %d-byte floating point constant", siz)
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case 4:
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flt := math.Float32bits(float32(p.To.U.Dval))
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ctxt.Arch.ByteOrder.PutUint32(s.P[off:], flt)
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case 8:
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flt := math.Float64bits(p.To.U.Dval)
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ctxt.Arch.ByteOrder.PutUint64(s.P[off:], flt)
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}
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case ctxt.Arch.D_SCONST:
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copy(s.P[off:off+siz], p.To.U.Sval)
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case ctxt.Arch.D_CONST, ctxt.Arch.D_ADDR:
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if p.To.Sym != nil || int(p.To.Type_) == ctxt.Arch.D_ADDR {
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r := Addrel(s)
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r.Off = off
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r.Siz = uint8(siz)
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r.Sym = p.To.Sym
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r.Type_ = R_ADDR
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r.Add = p.To.Offset
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break
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}
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o := p.To.Offset
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switch siz {
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default:
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ctxt.Diag("unexpected %d-byte integer constant", siz)
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case 1:
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s.P[off] = byte(o)
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case 2:
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ctxt.Arch.ByteOrder.PutUint16(s.P[off:], uint16(o))
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case 4:
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ctxt.Arch.ByteOrder.PutUint32(s.P[off:], uint32(o))
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case 8:
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ctxt.Arch.ByteOrder.PutUint64(s.P[off:], uint64(o))
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}
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}
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}
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func Addrel(s *LSym) *Reloc {
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s.R = append(s.R, Reloc{})
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return &s.R[len(s.R)-1]
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}
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func setuintxx(ctxt *Link, s *LSym, off int64, v uint64, wid int64) int64 {
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if s.Type_ == 0 {
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s.Type_ = SDATA
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}
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s.Reachable = 1
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if s.Size < off+wid {
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s.Size = off + wid
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Symgrow(ctxt, s, s.Size)
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}
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switch wid {
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case 1:
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s.P[off] = uint8(v)
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case 2:
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ctxt.Arch.ByteOrder.PutUint16(s.P[off:], uint16(v))
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case 4:
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ctxt.Arch.ByteOrder.PutUint32(s.P[off:], uint32(v))
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case 8:
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ctxt.Arch.ByteOrder.PutUint64(s.P[off:], uint64(v))
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}
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return off + wid
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}
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func adduintxx(ctxt *Link, s *LSym, v uint64, wid int) int64 {
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var off int64
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off = s.Size
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setuintxx(ctxt, s, off, v, int64(wid))
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return off
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}
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func adduint8(ctxt *Link, s *LSym, v uint8) int64 {
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return adduintxx(ctxt, s, uint64(v), 1)
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}
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func adduint16(ctxt *Link, s *LSym, v uint16) int64 {
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return adduintxx(ctxt, s, uint64(v), 2)
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}
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func Adduint32(ctxt *Link, s *LSym, v uint32) int64 {
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return adduintxx(ctxt, s, uint64(v), 4)
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}
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func Adduint64(ctxt *Link, s *LSym, v uint64) int64 {
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return adduintxx(ctxt, s, v, 8)
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}
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func setuint8(ctxt *Link, s *LSym, r int64, v uint8) int64 {
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return setuintxx(ctxt, s, r, uint64(v), 1)
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}
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func setuint16(ctxt *Link, s *LSym, r int64, v uint16) int64 {
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return setuintxx(ctxt, s, r, uint64(v), 2)
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}
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func setuint32(ctxt *Link, s *LSym, r int64, v uint32) int64 {
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return setuintxx(ctxt, s, r, uint64(v), 4)
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}
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func setuint64(ctxt *Link, s *LSym, r int64, v uint64) int64 {
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return setuintxx(ctxt, s, r, v, 8)
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}
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func addaddrplus(ctxt *Link, s *LSym, t *LSym, add int64) int64 {
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var i int64
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var r *Reloc
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if s.Type_ == 0 {
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s.Type_ = SDATA
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}
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s.Reachable = 1
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i = s.Size
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s.Size += int64(ctxt.Arch.Ptrsize)
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Symgrow(ctxt, s, s.Size)
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r = Addrel(s)
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r.Sym = t
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r.Off = int32(i)
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r.Siz = uint8(ctxt.Arch.Ptrsize)
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r.Type_ = R_ADDR
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r.Add = add
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return i + int64(r.Siz)
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}
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func addpcrelplus(ctxt *Link, s *LSym, t *LSym, add int64) int64 {
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var i int64
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var r *Reloc
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if s.Type_ == 0 {
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s.Type_ = SDATA
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}
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s.Reachable = 1
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i = s.Size
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s.Size += 4
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Symgrow(ctxt, s, s.Size)
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r = Addrel(s)
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r.Sym = t
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r.Off = int32(i)
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r.Add = add
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r.Type_ = R_PCREL
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r.Siz = 4
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return i + int64(r.Siz)
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}
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func addaddr(ctxt *Link, s *LSym, t *LSym) int64 {
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return addaddrplus(ctxt, s, t, 0)
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}
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func setaddrplus(ctxt *Link, s *LSym, off int64, t *LSym, add int64) int64 {
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var r *Reloc
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if s.Type_ == 0 {
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s.Type_ = SDATA
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}
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s.Reachable = 1
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if off+int64(ctxt.Arch.Ptrsize) > s.Size {
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s.Size = off + int64(ctxt.Arch.Ptrsize)
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Symgrow(ctxt, s, s.Size)
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}
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r = Addrel(s)
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r.Sym = t
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r.Off = int32(off)
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r.Siz = uint8(ctxt.Arch.Ptrsize)
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r.Type_ = R_ADDR
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r.Add = add
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return off + int64(r.Siz)
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}
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func setaddr(ctxt *Link, s *LSym, off int64, t *LSym) int64 {
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return setaddrplus(ctxt, s, off, t, 0)
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}
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func addsize(ctxt *Link, s *LSym, t *LSym) int64 {
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var i int64
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var r *Reloc
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if s.Type_ == 0 {
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s.Type_ = SDATA
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}
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s.Reachable = 1
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i = s.Size
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s.Size += int64(ctxt.Arch.Ptrsize)
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Symgrow(ctxt, s, s.Size)
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r = Addrel(s)
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r.Sym = t
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r.Off = int32(i)
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r.Siz = uint8(ctxt.Arch.Ptrsize)
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r.Type_ = R_SIZE
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return i + int64(r.Siz)
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}
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func addaddrplus4(ctxt *Link, s *LSym, t *LSym, add int64) int64 {
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var i int64
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var r *Reloc
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if s.Type_ == 0 {
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s.Type_ = SDATA
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}
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s.Reachable = 1
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i = s.Size
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s.Size += 4
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Symgrow(ctxt, s, s.Size)
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r = Addrel(s)
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r.Sym = t
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r.Off = int32(i)
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r.Siz = 4
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r.Type_ = R_ADDR
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r.Add = add
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return i + int64(r.Siz)
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}
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