mirror of
https://github.com/golang/go.git
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a037c73ccf
This updates dwarf.go to generate debug information as symbols instead of directly writing to the output file. This should make it easier to move generation of some of the debug info into the compiler. Change-Id: Id2358988bfb689865ab4d68f82716f0676336df4 Reviewed-on: https://go-review.googlesource.com/20679 Reviewed-by: David Crawshaw <crawshaw@golang.org> Run-TryBot: David Crawshaw <crawshaw@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
758 lines
18 KiB
Go
758 lines
18 KiB
Go
// Inferno utils/8l/asm.c
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// http://code.google.com/p/inferno-os/source/browse/utils/8l/asm.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 x86
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import (
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"cmd/internal/obj"
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"cmd/link/internal/ld"
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"fmt"
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"log"
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)
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// Append 4 bytes to s and create a R_CALL relocation targeting t to fill them in.
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func addcall(ctxt *ld.Link, s *ld.LSym, t *ld.LSym) {
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s.Attr |= ld.AttrReachable
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i := s.Size
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s.Size += 4
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ld.Symgrow(ctxt, s, s.Size)
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r := ld.Addrel(s)
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r.Sym = t
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r.Off = int32(i)
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r.Type = obj.R_CALL
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r.Siz = 4
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}
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func gentext() {
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if !ld.DynlinkingGo() && ld.Buildmode != ld.BuildmodePIE && ld.Buildmode != ld.BuildmodeCShared {
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return
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}
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thunkfunc := ld.Linklookup(ld.Ctxt, "__x86.get_pc_thunk.cx", 0)
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thunkfunc.Type = obj.STEXT
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thunkfunc.Attr |= ld.AttrLocal
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thunkfunc.Attr |= ld.AttrReachable
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o := func(op ...uint8) {
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for _, op1 := range op {
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ld.Adduint8(ld.Ctxt, thunkfunc, op1)
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}
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}
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// 8b 0c 24 mov (%esp),%ecx
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o(0x8b, 0x0c, 0x24)
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// c3 ret
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o(0xc3)
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if ld.Ctxt.Etextp != nil {
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ld.Ctxt.Etextp.Next = thunkfunc
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} else {
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ld.Ctxt.Textp = thunkfunc
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}
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ld.Ctxt.Etextp = thunkfunc
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addmoduledata := ld.Linklookup(ld.Ctxt, "runtime.addmoduledata", 0)
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if addmoduledata.Type == obj.STEXT {
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// we're linking a module containing the runtime -> no need for
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// an init function
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return
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}
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addmoduledata.Attr |= ld.AttrReachable
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initfunc := ld.Linklookup(ld.Ctxt, "go.link.addmoduledata", 0)
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initfunc.Type = obj.STEXT
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initfunc.Attr |= ld.AttrLocal
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initfunc.Attr |= ld.AttrReachable
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o = func(op ...uint8) {
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for _, op1 := range op {
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ld.Adduint8(ld.Ctxt, initfunc, op1)
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}
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}
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// go.link.addmoduledata:
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// 53 push %ebx
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// e8 00 00 00 00 call __x86.get_pc_thunk.cx + R_CALL __x86.get_pc_thunk.cx
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// 8d 81 00 00 00 00 lea 0x0(%ecx), %eax + R_PCREL ld.Ctxt.Moduledata
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// 8d 99 00 00 00 00 lea 0x0(%ecx), %ebx + R_GOTPC _GLOBAL_OFFSET_TABLE_
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// e8 00 00 00 00 call runtime.addmoduledata@plt + R_CALL runtime.addmoduledata
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// 5b pop %ebx
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// c3 ret
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o(0x53)
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o(0xe8)
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addcall(ld.Ctxt, initfunc, ld.Linklookup(ld.Ctxt, "__x86.get_pc_thunk.cx", 0))
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o(0x8d, 0x81)
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ld.Addpcrelplus(ld.Ctxt, initfunc, ld.Ctxt.Moduledata, 6)
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o(0x8d, 0x99)
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i := initfunc.Size
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initfunc.Size += 4
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ld.Symgrow(ld.Ctxt, initfunc, initfunc.Size)
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r := ld.Addrel(initfunc)
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r.Sym = ld.Linklookup(ld.Ctxt, "_GLOBAL_OFFSET_TABLE_", 0)
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r.Off = int32(i)
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r.Type = obj.R_PCREL
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r.Add = 12
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r.Siz = 4
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o(0xe8)
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addcall(ld.Ctxt, initfunc, addmoduledata)
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o(0x5b)
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o(0xc3)
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ld.Ctxt.Etextp.Next = initfunc
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ld.Ctxt.Etextp = initfunc
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initarray_entry := ld.Linklookup(ld.Ctxt, "go.link.addmoduledatainit", 0)
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initarray_entry.Attr |= ld.AttrReachable
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initarray_entry.Attr |= ld.AttrLocal
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initarray_entry.Type = obj.SINITARR
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ld.Addaddr(ld.Ctxt, initarray_entry, initfunc)
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}
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func adddynrela(rela *ld.LSym, s *ld.LSym, r *ld.Reloc) {
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log.Fatalf("adddynrela not implemented")
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}
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func adddynrel(s *ld.LSym, r *ld.Reloc) {
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targ := r.Sym
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ld.Ctxt.Cursym = s
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switch r.Type {
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default:
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if r.Type >= 256 {
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ld.Diag("unexpected relocation type %d", r.Type)
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return
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}
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// Handle relocations found in ELF object files.
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case 256 + ld.R_386_PC32:
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if targ.Type == obj.SDYNIMPORT {
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ld.Diag("unexpected R_386_PC32 relocation for dynamic symbol %s", targ.Name)
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}
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if targ.Type == 0 || targ.Type == obj.SXREF {
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ld.Diag("unknown symbol %s in pcrel", targ.Name)
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}
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r.Type = obj.R_PCREL
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r.Add += 4
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return
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case 256 + ld.R_386_PLT32:
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r.Type = obj.R_PCREL
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r.Add += 4
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if targ.Type == obj.SDYNIMPORT {
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addpltsym(ld.Ctxt, targ)
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r.Sym = ld.Linklookup(ld.Ctxt, ".plt", 0)
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r.Add += int64(targ.Plt)
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}
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return
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case 256 + ld.R_386_GOT32, 256 + ld.R_386_GOT32X:
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if targ.Type != obj.SDYNIMPORT {
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// have symbol
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if r.Off >= 2 && s.P[r.Off-2] == 0x8b {
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// turn MOVL of GOT entry into LEAL of symbol address, relative to GOT.
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s.P[r.Off-2] = 0x8d
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r.Type = obj.R_GOTOFF
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return
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}
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if r.Off >= 2 && s.P[r.Off-2] == 0xff && s.P[r.Off-1] == 0xb3 {
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// turn PUSHL of GOT entry into PUSHL of symbol itself.
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// use unnecessary SS prefix to keep instruction same length.
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s.P[r.Off-2] = 0x36
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s.P[r.Off-1] = 0x68
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r.Type = obj.R_ADDR
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return
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}
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ld.Diag("unexpected GOT reloc for non-dynamic symbol %s", targ.Name)
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return
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}
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addgotsym(ld.Ctxt, targ)
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r.Type = obj.R_CONST // write r->add during relocsym
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r.Sym = nil
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r.Add += int64(targ.Got)
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return
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case 256 + ld.R_386_GOTOFF:
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r.Type = obj.R_GOTOFF
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return
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case 256 + ld.R_386_GOTPC:
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r.Type = obj.R_PCREL
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r.Sym = ld.Linklookup(ld.Ctxt, ".got", 0)
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r.Add += 4
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return
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case 256 + ld.R_386_32:
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if targ.Type == obj.SDYNIMPORT {
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ld.Diag("unexpected R_386_32 relocation for dynamic symbol %s", targ.Name)
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}
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r.Type = obj.R_ADDR
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return
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case 512 + ld.MACHO_GENERIC_RELOC_VANILLA*2 + 0:
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r.Type = obj.R_ADDR
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if targ.Type == obj.SDYNIMPORT {
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ld.Diag("unexpected reloc for dynamic symbol %s", targ.Name)
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}
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return
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case 512 + ld.MACHO_GENERIC_RELOC_VANILLA*2 + 1:
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if targ.Type == obj.SDYNIMPORT {
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addpltsym(ld.Ctxt, targ)
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r.Sym = ld.Linklookup(ld.Ctxt, ".plt", 0)
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r.Add = int64(targ.Plt)
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r.Type = obj.R_PCREL
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return
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}
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r.Type = obj.R_PCREL
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return
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case 512 + ld.MACHO_FAKE_GOTPCREL:
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if targ.Type != obj.SDYNIMPORT {
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// have symbol
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// turn MOVL of GOT entry into LEAL of symbol itself
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if r.Off < 2 || s.P[r.Off-2] != 0x8b {
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ld.Diag("unexpected GOT reloc for non-dynamic symbol %s", targ.Name)
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return
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}
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s.P[r.Off-2] = 0x8d
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r.Type = obj.R_PCREL
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return
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}
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addgotsym(ld.Ctxt, targ)
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r.Sym = ld.Linklookup(ld.Ctxt, ".got", 0)
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r.Add += int64(targ.Got)
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r.Type = obj.R_PCREL
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return
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}
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// Handle references to ELF symbols from our own object files.
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if targ.Type != obj.SDYNIMPORT {
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return
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}
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switch r.Type {
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case obj.R_CALL,
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obj.R_PCREL:
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addpltsym(ld.Ctxt, targ)
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r.Sym = ld.Linklookup(ld.Ctxt, ".plt", 0)
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r.Add = int64(targ.Plt)
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return
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case obj.R_ADDR:
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if s.Type != obj.SDATA {
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break
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}
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if ld.Iself {
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ld.Adddynsym(ld.Ctxt, targ)
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rel := ld.Linklookup(ld.Ctxt, ".rel", 0)
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ld.Addaddrplus(ld.Ctxt, rel, s, int64(r.Off))
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ld.Adduint32(ld.Ctxt, rel, ld.ELF32_R_INFO(uint32(targ.Dynid), ld.R_386_32))
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r.Type = obj.R_CONST // write r->add during relocsym
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r.Sym = nil
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return
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}
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if ld.HEADTYPE == obj.Hdarwin && s.Size == PtrSize && r.Off == 0 {
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// Mach-O relocations are a royal pain to lay out.
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// They use a compact stateful bytecode representation
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// that is too much bother to deal with.
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// Instead, interpret the C declaration
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// void *_Cvar_stderr = &stderr;
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// as making _Cvar_stderr the name of a GOT entry
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// for stderr. This is separate from the usual GOT entry,
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// just in case the C code assigns to the variable,
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// and of course it only works for single pointers,
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// but we only need to support cgo and that's all it needs.
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ld.Adddynsym(ld.Ctxt, targ)
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got := ld.Linklookup(ld.Ctxt, ".got", 0)
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s.Type = got.Type | obj.SSUB
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s.Outer = got
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s.Sub = got.Sub
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got.Sub = s
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s.Value = got.Size
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ld.Adduint32(ld.Ctxt, got, 0)
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ld.Adduint32(ld.Ctxt, ld.Linklookup(ld.Ctxt, ".linkedit.got", 0), uint32(targ.Dynid))
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r.Type = 256 // ignore during relocsym
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return
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}
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if ld.HEADTYPE == obj.Hwindows && s.Size == PtrSize {
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// nothing to do, the relocation will be laid out in pereloc1
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return
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}
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}
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ld.Ctxt.Cursym = s
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ld.Diag("unsupported relocation for dynamic symbol %s (type=%d stype=%d)", targ.Name, r.Type, targ.Type)
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}
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func elfreloc1(r *ld.Reloc, sectoff int64) int {
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ld.Thearch.Lput(uint32(sectoff))
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elfsym := r.Xsym.ElfsymForReloc()
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switch r.Type {
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default:
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return -1
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case obj.R_ADDR:
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if r.Siz == 4 {
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ld.Thearch.Lput(ld.R_386_32 | uint32(elfsym)<<8)
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} else {
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return -1
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}
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case obj.R_GOTPCREL:
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if r.Siz == 4 {
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ld.Thearch.Lput(ld.R_386_GOTPC)
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if r.Xsym.Name != "_GLOBAL_OFFSET_TABLE_" {
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ld.Thearch.Lput(uint32(sectoff))
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ld.Thearch.Lput(ld.R_386_GOT32 | uint32(elfsym)<<8)
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}
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} else {
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return -1
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}
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case obj.R_CALL:
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if r.Siz == 4 {
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if r.Xsym.Type == obj.SDYNIMPORT {
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ld.Thearch.Lput(ld.R_386_PLT32 | uint32(elfsym)<<8)
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} else {
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ld.Thearch.Lput(ld.R_386_PC32 | uint32(elfsym)<<8)
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}
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} else {
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return -1
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}
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case obj.R_PCREL:
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if r.Siz == 4 {
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ld.Thearch.Lput(ld.R_386_PC32 | uint32(elfsym)<<8)
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} else {
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return -1
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}
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case obj.R_TLS_LE:
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if r.Siz == 4 {
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ld.Thearch.Lput(ld.R_386_TLS_LE | uint32(elfsym)<<8)
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} else {
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return -1
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}
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case obj.R_TLS_IE:
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if r.Siz == 4 {
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ld.Thearch.Lput(ld.R_386_GOTPC)
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ld.Thearch.Lput(uint32(sectoff))
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ld.Thearch.Lput(ld.R_386_TLS_GOTIE | uint32(elfsym)<<8)
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} else {
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return -1
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}
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}
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return 0
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}
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func machoreloc1(r *ld.Reloc, sectoff int64) int {
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var v uint32
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rs := r.Xsym
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if rs.Type == obj.SHOSTOBJ {
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if rs.Dynid < 0 {
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ld.Diag("reloc %d to non-macho symbol %s type=%d", r.Type, rs.Name, rs.Type)
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return -1
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}
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v = uint32(rs.Dynid)
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v |= 1 << 27 // external relocation
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} else {
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v = uint32(rs.Sect.Extnum)
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if v == 0 {
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ld.Diag("reloc %d to symbol %s in non-macho section %s type=%d", r.Type, rs.Name, rs.Sect.Name, rs.Type)
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return -1
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}
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}
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switch r.Type {
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default:
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return -1
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case obj.R_ADDR:
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v |= ld.MACHO_GENERIC_RELOC_VANILLA << 28
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case obj.R_CALL,
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obj.R_PCREL:
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v |= 1 << 24 // pc-relative bit
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v |= ld.MACHO_GENERIC_RELOC_VANILLA << 28
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}
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switch r.Siz {
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default:
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return -1
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case 1:
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v |= 0 << 25
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case 2:
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v |= 1 << 25
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case 4:
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v |= 2 << 25
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case 8:
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v |= 3 << 25
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}
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ld.Thearch.Lput(uint32(sectoff))
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ld.Thearch.Lput(v)
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return 0
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}
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func pereloc1(r *ld.Reloc, sectoff int64) bool {
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var v uint32
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rs := r.Xsym
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if rs.Dynid < 0 {
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ld.Diag("reloc %d to non-coff symbol %s type=%d", r.Type, rs.Name, rs.Type)
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return false
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}
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ld.Thearch.Lput(uint32(sectoff))
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ld.Thearch.Lput(uint32(rs.Dynid))
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switch r.Type {
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default:
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return false
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case obj.R_ADDR:
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v = ld.IMAGE_REL_I386_DIR32
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case obj.R_CALL,
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obj.R_PCREL:
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v = ld.IMAGE_REL_I386_REL32
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}
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ld.Thearch.Wput(uint16(v))
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return true
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}
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func archreloc(r *ld.Reloc, s *ld.LSym, val *int64) int {
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if ld.Linkmode == ld.LinkExternal {
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return -1
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}
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switch r.Type {
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case obj.R_CONST:
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*val = r.Add
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return 0
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case obj.R_GOTOFF:
|
|
*val = ld.Symaddr(r.Sym) + r.Add - ld.Symaddr(ld.Linklookup(ld.Ctxt, ".got", 0))
|
|
return 0
|
|
}
|
|
|
|
return -1
|
|
}
|
|
|
|
func archrelocvariant(r *ld.Reloc, s *ld.LSym, t int64) int64 {
|
|
log.Fatalf("unexpected relocation variant")
|
|
return t
|
|
}
|
|
|
|
func elfsetupplt() {
|
|
plt := ld.Linklookup(ld.Ctxt, ".plt", 0)
|
|
got := ld.Linklookup(ld.Ctxt, ".got.plt", 0)
|
|
if plt.Size == 0 {
|
|
// pushl got+4
|
|
ld.Adduint8(ld.Ctxt, plt, 0xff)
|
|
|
|
ld.Adduint8(ld.Ctxt, plt, 0x35)
|
|
ld.Addaddrplus(ld.Ctxt, plt, got, 4)
|
|
|
|
// jmp *got+8
|
|
ld.Adduint8(ld.Ctxt, plt, 0xff)
|
|
|
|
ld.Adduint8(ld.Ctxt, plt, 0x25)
|
|
ld.Addaddrplus(ld.Ctxt, plt, got, 8)
|
|
|
|
// zero pad
|
|
ld.Adduint32(ld.Ctxt, plt, 0)
|
|
|
|
// assume got->size == 0 too
|
|
ld.Addaddrplus(ld.Ctxt, got, ld.Linklookup(ld.Ctxt, ".dynamic", 0), 0)
|
|
|
|
ld.Adduint32(ld.Ctxt, got, 0)
|
|
ld.Adduint32(ld.Ctxt, got, 0)
|
|
}
|
|
}
|
|
|
|
func addpltsym(ctxt *ld.Link, s *ld.LSym) {
|
|
if s.Plt >= 0 {
|
|
return
|
|
}
|
|
|
|
ld.Adddynsym(ctxt, s)
|
|
|
|
if ld.Iself {
|
|
plt := ld.Linklookup(ctxt, ".plt", 0)
|
|
got := ld.Linklookup(ctxt, ".got.plt", 0)
|
|
rel := ld.Linklookup(ctxt, ".rel.plt", 0)
|
|
if plt.Size == 0 {
|
|
elfsetupplt()
|
|
}
|
|
|
|
// jmpq *got+size
|
|
ld.Adduint8(ctxt, plt, 0xff)
|
|
|
|
ld.Adduint8(ctxt, plt, 0x25)
|
|
ld.Addaddrplus(ctxt, plt, got, got.Size)
|
|
|
|
// add to got: pointer to current pos in plt
|
|
ld.Addaddrplus(ctxt, got, plt, plt.Size)
|
|
|
|
// pushl $x
|
|
ld.Adduint8(ctxt, plt, 0x68)
|
|
|
|
ld.Adduint32(ctxt, plt, uint32(rel.Size))
|
|
|
|
// jmp .plt
|
|
ld.Adduint8(ctxt, plt, 0xe9)
|
|
|
|
ld.Adduint32(ctxt, plt, uint32(-(plt.Size + 4)))
|
|
|
|
// rel
|
|
ld.Addaddrplus(ctxt, rel, got, got.Size-4)
|
|
|
|
ld.Adduint32(ctxt, rel, ld.ELF32_R_INFO(uint32(s.Dynid), ld.R_386_JMP_SLOT))
|
|
|
|
s.Plt = int32(plt.Size - 16)
|
|
} else if ld.HEADTYPE == obj.Hdarwin {
|
|
// Same laziness as in 6l.
|
|
|
|
plt := ld.Linklookup(ctxt, ".plt", 0)
|
|
|
|
addgotsym(ctxt, s)
|
|
|
|
ld.Adduint32(ctxt, ld.Linklookup(ctxt, ".linkedit.plt", 0), uint32(s.Dynid))
|
|
|
|
// jmpq *got+size(IP)
|
|
s.Plt = int32(plt.Size)
|
|
|
|
ld.Adduint8(ctxt, plt, 0xff)
|
|
ld.Adduint8(ctxt, plt, 0x25)
|
|
ld.Addaddrplus(ctxt, plt, ld.Linklookup(ctxt, ".got", 0), int64(s.Got))
|
|
} else {
|
|
ld.Diag("addpltsym: unsupported binary format")
|
|
}
|
|
}
|
|
|
|
func addgotsym(ctxt *ld.Link, s *ld.LSym) {
|
|
if s.Got >= 0 {
|
|
return
|
|
}
|
|
|
|
ld.Adddynsym(ctxt, s)
|
|
got := ld.Linklookup(ctxt, ".got", 0)
|
|
s.Got = int32(got.Size)
|
|
ld.Adduint32(ctxt, got, 0)
|
|
|
|
if ld.Iself {
|
|
rel := ld.Linklookup(ctxt, ".rel", 0)
|
|
ld.Addaddrplus(ctxt, rel, got, int64(s.Got))
|
|
ld.Adduint32(ctxt, rel, ld.ELF32_R_INFO(uint32(s.Dynid), ld.R_386_GLOB_DAT))
|
|
} else if ld.HEADTYPE == obj.Hdarwin {
|
|
ld.Adduint32(ctxt, ld.Linklookup(ctxt, ".linkedit.got", 0), uint32(s.Dynid))
|
|
} else {
|
|
ld.Diag("addgotsym: unsupported binary format")
|
|
}
|
|
}
|
|
|
|
func asmb() {
|
|
if ld.Debug['v'] != 0 {
|
|
fmt.Fprintf(&ld.Bso, "%5.2f asmb\n", obj.Cputime())
|
|
}
|
|
ld.Bso.Flush()
|
|
|
|
if ld.Iself {
|
|
ld.Asmbelfsetup()
|
|
}
|
|
|
|
sect := ld.Segtext.Sect
|
|
ld.Cseek(int64(sect.Vaddr - ld.Segtext.Vaddr + ld.Segtext.Fileoff))
|
|
ld.Codeblk(int64(sect.Vaddr), int64(sect.Length))
|
|
for sect = sect.Next; sect != nil; sect = sect.Next {
|
|
ld.Cseek(int64(sect.Vaddr - ld.Segtext.Vaddr + ld.Segtext.Fileoff))
|
|
ld.Datblk(int64(sect.Vaddr), int64(sect.Length))
|
|
}
|
|
|
|
if ld.Segrodata.Filelen > 0 {
|
|
if ld.Debug['v'] != 0 {
|
|
fmt.Fprintf(&ld.Bso, "%5.2f rodatblk\n", obj.Cputime())
|
|
}
|
|
ld.Bso.Flush()
|
|
|
|
ld.Cseek(int64(ld.Segrodata.Fileoff))
|
|
ld.Datblk(int64(ld.Segrodata.Vaddr), int64(ld.Segrodata.Filelen))
|
|
}
|
|
|
|
if ld.Debug['v'] != 0 {
|
|
fmt.Fprintf(&ld.Bso, "%5.2f datblk\n", obj.Cputime())
|
|
}
|
|
ld.Bso.Flush()
|
|
|
|
ld.Cseek(int64(ld.Segdata.Fileoff))
|
|
ld.Datblk(int64(ld.Segdata.Vaddr), int64(ld.Segdata.Filelen))
|
|
|
|
ld.Cseek(int64(ld.Segdwarf.Fileoff))
|
|
ld.Dwarfblk(int64(ld.Segdwarf.Vaddr), int64(ld.Segdwarf.Filelen))
|
|
|
|
machlink := uint32(0)
|
|
if ld.HEADTYPE == obj.Hdarwin {
|
|
machlink = uint32(ld.Domacholink())
|
|
}
|
|
|
|
ld.Symsize = 0
|
|
ld.Spsize = 0
|
|
ld.Lcsize = 0
|
|
symo := uint32(0)
|
|
if ld.Debug['s'] == 0 {
|
|
// TODO: rationalize
|
|
if ld.Debug['v'] != 0 {
|
|
fmt.Fprintf(&ld.Bso, "%5.2f sym\n", obj.Cputime())
|
|
}
|
|
ld.Bso.Flush()
|
|
switch ld.HEADTYPE {
|
|
default:
|
|
if ld.Iself {
|
|
symo = uint32(ld.Segdwarf.Fileoff + ld.Segdwarf.Filelen)
|
|
symo = uint32(ld.Rnd(int64(symo), int64(ld.INITRND)))
|
|
}
|
|
|
|
case obj.Hplan9:
|
|
symo = uint32(ld.Segdata.Fileoff + ld.Segdata.Filelen)
|
|
|
|
case obj.Hdarwin:
|
|
symo = uint32(ld.Segdwarf.Fileoff + uint64(ld.Rnd(int64(ld.Segdwarf.Filelen), int64(ld.INITRND))) + uint64(machlink))
|
|
|
|
case obj.Hwindows:
|
|
symo = uint32(ld.Segdwarf.Fileoff + ld.Segdwarf.Filelen)
|
|
symo = uint32(ld.Rnd(int64(symo), ld.PEFILEALIGN))
|
|
}
|
|
|
|
ld.Cseek(int64(symo))
|
|
switch ld.HEADTYPE {
|
|
default:
|
|
if ld.Iself {
|
|
if ld.Debug['v'] != 0 {
|
|
fmt.Fprintf(&ld.Bso, "%5.2f elfsym\n", obj.Cputime())
|
|
}
|
|
ld.Asmelfsym()
|
|
ld.Cflush()
|
|
ld.Cwrite(ld.Elfstrdat)
|
|
|
|
if ld.Linkmode == ld.LinkExternal {
|
|
ld.Elfemitreloc()
|
|
}
|
|
}
|
|
|
|
case obj.Hplan9:
|
|
ld.Asmplan9sym()
|
|
ld.Cflush()
|
|
|
|
sym := ld.Linklookup(ld.Ctxt, "pclntab", 0)
|
|
if sym != nil {
|
|
ld.Lcsize = int32(len(sym.P))
|
|
for i := 0; int32(i) < ld.Lcsize; i++ {
|
|
ld.Cput(uint8(sym.P[i]))
|
|
}
|
|
|
|
ld.Cflush()
|
|
}
|
|
|
|
case obj.Hwindows:
|
|
if ld.Debug['v'] != 0 {
|
|
fmt.Fprintf(&ld.Bso, "%5.2f dwarf\n", obj.Cputime())
|
|
}
|
|
|
|
case obj.Hdarwin:
|
|
if ld.Linkmode == ld.LinkExternal {
|
|
ld.Machoemitreloc()
|
|
}
|
|
}
|
|
}
|
|
|
|
if ld.Debug['v'] != 0 {
|
|
fmt.Fprintf(&ld.Bso, "%5.2f headr\n", obj.Cputime())
|
|
}
|
|
ld.Bso.Flush()
|
|
ld.Cseek(0)
|
|
switch ld.HEADTYPE {
|
|
default:
|
|
case obj.Hplan9: /* plan9 */
|
|
magic := int32(4*11*11 + 7)
|
|
|
|
ld.Lputb(uint32(magic)) /* magic */
|
|
ld.Lputb(uint32(ld.Segtext.Filelen)) /* sizes */
|
|
ld.Lputb(uint32(ld.Segdata.Filelen))
|
|
ld.Lputb(uint32(ld.Segdata.Length - ld.Segdata.Filelen))
|
|
ld.Lputb(uint32(ld.Symsize)) /* nsyms */
|
|
ld.Lputb(uint32(ld.Entryvalue())) /* va of entry */
|
|
ld.Lputb(uint32(ld.Spsize)) /* sp offsets */
|
|
ld.Lputb(uint32(ld.Lcsize)) /* line offsets */
|
|
|
|
case obj.Hdarwin:
|
|
ld.Asmbmacho()
|
|
|
|
case obj.Hlinux,
|
|
obj.Hfreebsd,
|
|
obj.Hnetbsd,
|
|
obj.Hopenbsd,
|
|
obj.Hnacl:
|
|
ld.Asmbelf(int64(symo))
|
|
|
|
case obj.Hwindows:
|
|
ld.Asmbpe()
|
|
}
|
|
|
|
ld.Cflush()
|
|
}
|