qbit/go
1
0
Fork 0
mirror of https://github.com/golang/go synced 2024-11-19 14:24:47 -07:00
Code Releases Activity

cmd/link: introduce and use peFile.writeSymbols

Browse Source 
Change-Id: If629b19cebc6ae8dfbf603dcd7f2dd3d0046a935
Reviewed-on: https://go-review.googlesource.com/59425
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Alex Brainman 2017-08-28 13:39:19 +10:00
parent 84af5ea9b4
commit 2034297bdb
1 changed files with 59 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

118
src/cmd/link/internal/ld/pe.go
View File

@ -696,6 +696,64 @@ func (f *peFile) mapToPESection(s *Symbol) (pesectidx int, offset int64, err err
return f.bssSect.index, int64(v - Segdata.Filelen), nil
}
// writeSymbols writes all COFF symbol table records.
func (f *peFile) writeSymbols(ctxt *Link) {
put := func(ctxt *Link, s *Symbol, name string, type_ SymbolType, addr int64, gotype *Symbol) {
if s == nil {
return
}
if s.Sect == nil && type_ != UndefinedSym {
return
}
switch type_ {
default:
return
case DataSym, BSSSym, TextSym, UndefinedSym:
}
// Only windows/386 requires underscore prefix on external symbols.
if SysArch.Family == sys.I386 &&
Linkmode == LinkExternal &&
(s.Type == SHOSTOBJ || s.Attr.CgoExport()) {
s.Name = "_" + s.Name
}
var typ uint16
if Linkmode == LinkExternal {
typ = IMAGE_SYM_TYPE_NULL
} else {
// TODO: fix IMAGE_SYM_DTYPE_ARRAY value and use following expression, instead of 0x0308
typ = IMAGE_SYM_DTYPE_ARRAY<<8 + IMAGE_SYM_TYPE_STRUCT
typ = 0x0308 // "array of structs"
}
sect, value, err := f.mapToPESection(s)
if err != nil {
if type_ == UndefinedSym {
typ = IMAGE_SYM_DTYPE_FUNCTION
} else {
Errorf(s, "addpesym: %v", err)
}
}
class := IMAGE_SYM_CLASS_EXTERNAL
if s.Version != 0 || (s.Type&SHIDDEN != 0) || s.Attr.Local() {
class = IMAGE_SYM_CLASS_STATIC
}
f.writeSymbol(s, value, sect, typ, uint8(class))
}
if Linkmode == LinkExternal {
// Include section symbols as external, because
// .ctors and .debug_* section relocations refer to it.
for _, pesect := range f.sections {
sym := ctxt.Syms.Lookup(pesect.name, 0)
f.writeSymbol(sym, 0, pesect.index, IMAGE_SYM_TYPE_NULL, IMAGE_SYM_CLASS_STATIC)
}
}
genasmsym(ctxt, put)
}
var pefile peFile
func Peinit(ctxt *Link) {
@ -1080,70 +1138,12 @@ func (ctxt *Link) dope() {
initdynexport(ctxt)
}
// writePESymTableRecords writes all COFF symbol table records.
func writePESymTableRecords(ctxt *Link) {
put := func(ctxt *Link, s *Symbol, name string, type_ SymbolType, addr int64, gotype *Symbol) {
if s == nil {
return
}
if s.Sect == nil && type_ != UndefinedSym {
return
}
switch type_ {
default:
return
case DataSym, BSSSym, TextSym, UndefinedSym:
}
// Only windows/386 requires underscore prefix on external symbols.
if SysArch.Family == sys.I386 &&
Linkmode == LinkExternal &&
(s.Type == SHOSTOBJ || s.Attr.CgoExport()) {
s.Name = "_" + s.Name
}
var typ uint16
if Linkmode == LinkExternal {
typ = IMAGE_SYM_TYPE_NULL
} else {
// TODO: fix IMAGE_SYM_DTYPE_ARRAY value and use following expression, instead of 0x0308
typ = IMAGE_SYM_DTYPE_ARRAY<<8 + IMAGE_SYM_TYPE_STRUCT
typ = 0x0308 // "array of structs"
}
sect, value, err := pefile.mapToPESection(s)
if err != nil {
if type_ == UndefinedSym {
typ = IMAGE_SYM_DTYPE_FUNCTION
} else {
Errorf(s, "addpesym: %v", err)
}
}
class := IMAGE_SYM_CLASS_EXTERNAL
if s.Version != 0 || (s.Type&SHIDDEN != 0) || s.Attr.Local() {
class = IMAGE_SYM_CLASS_STATIC
}
pefile.writeSymbol(s, value, sect, typ, uint8(class))
}
if Linkmode == LinkExternal {
// Include section symbols as external, because
// .ctors and .debug_* section relocations refer to it.
for _, pesect := range pefile.sections {
sym := ctxt.Syms.Lookup(pesect.name, 0)
pefile.writeSymbol(sym, 0, pesect.index, IMAGE_SYM_TYPE_NULL, IMAGE_SYM_CLASS_STATIC)
}
}
genasmsym(ctxt, put)
}
func addpesymtable(ctxt *Link) {
symtabStartPos := coutbuf.Offset()
// write COFF symbol table
if !*FlagS || Linkmode == LinkExternal {
writePESymTableRecords(ctxt)
pefile.writeSymbols(ctxt)
}
// update COFF file header and section table