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path: root/src/cmd/link/internal/loadpe/ldpe.go
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Diffstat (limited to 'src/cmd/link/internal/loadpe/ldpe.go')
-rw-r--r--src/cmd/link/internal/loadpe/ldpe.go176
1 files changed, 89 insertions, 87 deletions
diff --git a/src/cmd/link/internal/loadpe/ldpe.go b/src/cmd/link/internal/loadpe/ldpe.go
index 8b6aac338c..88819f3488 100644
--- a/src/cmd/link/internal/loadpe/ldpe.go
+++ b/src/cmd/link/internal/loadpe/ldpe.go
@@ -145,22 +145,26 @@ func (f *peBiobuf) ReadAt(p []byte, off int64) (int, error) {
return n, nil
}
-func Load(l *loader.Loader, arch *sys.Arch, syms *sym.Symbols, input *bio.Reader, pkg string, length int64, pn string) (textp []*sym.Symbol, rsrc *sym.Symbol, err error) {
- lookup := func(name string, version int) *sym.Symbol {
- return l.LookupOrCreate(name, version, syms)
+// makeUpdater creates a loader.SymbolBuilder if one hasn't been created previously.
+// We use this to lazily make SymbolBuilders as we don't always need a builder, and creating them for all symbols might be an error.
+func makeUpdater(l *loader.Loader, bld *loader.SymbolBuilder, s loader.Sym) *loader.SymbolBuilder {
+ if bld != nil {
+ return bld
}
- return load(arch, lookup, syms.IncVersion(), input, pkg, length, pn)
+ bld = l.MakeSymbolUpdater(s)
+ return bld
}
-func LoadOld(arch *sys.Arch, syms *sym.Symbols, input *bio.Reader, pkg string, length int64, pn string) (textp []*sym.Symbol, rsrc *sym.Symbol, err error) {
- return load(arch, syms.Lookup, syms.IncVersion(), input, pkg, length, pn)
-}
-
-// load loads the PE file pn from input.
+// Load loads the PE file pn from input.
// Symbols are written into syms, and a slice of the text symbols is returned.
// If an .rsrc section is found, its symbol is returned as rsrc.
-func load(arch *sys.Arch, lookup func(string, int) *sym.Symbol, localSymVersion int, input *bio.Reader, pkg string, length int64, pn string) (textp []*sym.Symbol, rsrc *sym.Symbol, err error) {
- sectsyms := make(map[*pe.Section]*sym.Symbol)
+func Load(l *loader.Loader, arch *sys.Arch, localSymVersion int, input *bio.Reader, pkg string, length int64, pn string) (textp []loader.Sym, rsrc loader.Sym, err error) {
+ lookup := func(name string, version int) (*loader.SymbolBuilder, loader.Sym) {
+ s := l.LookupOrCreateSym(name, version)
+ sb := l.MakeSymbolUpdater(s)
+ return sb, s
+ }
+ sectsyms := make(map[*pe.Section]loader.Sym)
sectdata := make(map[*pe.Section][]byte)
// Some input files are archives containing multiple of
@@ -172,7 +176,7 @@ func load(arch *sys.Arch, lookup func(string, int) *sym.Symbol, localSymVersion
// TODO: replace pe.NewFile with pe.Load (grep for "add Load function" in debug/pe for details)
f, err := pe.NewFile(sr)
if err != nil {
- return nil, nil, err
+ return nil, 0, err
}
defer f.Close()
@@ -191,34 +195,34 @@ func load(arch *sys.Arch, lookup func(string, int) *sym.Symbol, localSymVersion
}
name := fmt.Sprintf("%s(%s)", pkg, sect.Name)
- s := lookup(name, localSymVersion)
+ bld, s := lookup(name, localSymVersion)
switch sect.Characteristics & (IMAGE_SCN_CNT_UNINITIALIZED_DATA | IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE | IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE) {
case IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ: //.rdata
- s.Type = sym.SRODATA
+ bld.SetType(sym.SRODATA)
case IMAGE_SCN_CNT_UNINITIALIZED_DATA | IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE: //.bss
- s.Type = sym.SNOPTRBSS
+ bld.SetType(sym.SNOPTRBSS)
case IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ | IMAGE_SCN_MEM_WRITE: //.data
- s.Type = sym.SNOPTRDATA
+ bld.SetType(sym.SNOPTRDATA)
case IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE | IMAGE_SCN_MEM_READ: //.text
- s.Type = sym.STEXT
+ bld.SetType(sym.STEXT)
default:
- return nil, nil, fmt.Errorf("unexpected flags %#06x for PE section %s", sect.Characteristics, sect.Name)
+ return nil, 0, fmt.Errorf("unexpected flags %#06x for PE section %s", sect.Characteristics, sect.Name)
}
- if s.Type != sym.SNOPTRBSS {
+ if bld.Type() != sym.SNOPTRBSS {
data, err := sect.Data()
if err != nil {
- return nil, nil, err
+ return nil, 0, err
}
sectdata[sect] = data
- s.P = data
+ bld.SetData(data)
}
- s.Size = int64(sect.Size)
+ bld.SetSize(int64(sect.Size))
sectsyms[sect] = s
if sect.Name == ".rsrc" {
rsrc = s
@@ -242,35 +246,35 @@ func load(arch *sys.Arch, lookup func(string, int) *sym.Symbol, localSymVersion
continue
}
- rs := make([]sym.Reloc, rsect.NumberOfRelocations)
+ rs := make([]loader.Reloc, rsect.NumberOfRelocations)
for j, r := range rsect.Relocs {
rp := &rs[j]
if int(r.SymbolTableIndex) >= len(f.COFFSymbols) {
- return nil, nil, fmt.Errorf("relocation number %d symbol index idx=%d cannot be large then number of symbols %d", j, r.SymbolTableIndex, len(f.COFFSymbols))
+ return nil, 0, fmt.Errorf("relocation number %d symbol index idx=%d cannot be large then number of symbols %d", j, r.SymbolTableIndex, len(f.COFFSymbols))
}
pesym := &f.COFFSymbols[r.SymbolTableIndex]
- gosym, err := readpesym(arch, lookup, f, pesym, sectsyms, localSymVersion)
+ _, gosym, err := readpesym(l, arch, l.LookupOrCreateSym, f, pesym, sectsyms, localSymVersion)
if err != nil {
- return nil, nil, err
+ return nil, 0, err
}
- if gosym == nil {
+ if gosym == 0 {
name, err := pesym.FullName(f.StringTable)
if err != nil {
name = string(pesym.Name[:])
}
- return nil, nil, fmt.Errorf("reloc of invalid sym %s idx=%d type=%d", name, r.SymbolTableIndex, pesym.Type)
+ return nil, 0, fmt.Errorf("reloc of invalid sym %s idx=%d type=%d", name, r.SymbolTableIndex, pesym.Type)
}
rp.Sym = gosym
- rp.Siz = 4
+ rp.Size = 4
rp.Off = int32(r.VirtualAddress)
switch arch.Family {
default:
- return nil, nil, fmt.Errorf("%s: unsupported arch %v", pn, arch.Family)
+ return nil, 0, fmt.Errorf("%s: unsupported arch %v", pn, arch.Family)
case sys.I386, sys.AMD64:
switch r.Type {
default:
- return nil, nil, fmt.Errorf("%s: %v: unknown relocation type %v", pn, sectsyms[rsect], r.Type)
+ return nil, 0, fmt.Errorf("%s: %v: unknown relocation type %v", pn, sectsyms[rsect], r.Type)
case IMAGE_REL_I386_REL32, IMAGE_REL_AMD64_REL32,
IMAGE_REL_AMD64_ADDR32, // R_X86_64_PC32
@@ -286,7 +290,7 @@ func load(arch *sys.Arch, lookup func(string, int) *sym.Symbol, localSymVersion
rp.Add = int64(int32(binary.LittleEndian.Uint32(sectdata[rsect][rp.Off:])))
case IMAGE_REL_AMD64_ADDR64: // R_X86_64_64
- rp.Siz = 8
+ rp.Size = 8
rp.Type = objabi.R_ADDR
@@ -297,7 +301,7 @@ func load(arch *sys.Arch, lookup func(string, int) *sym.Symbol, localSymVersion
case sys.ARM:
switch r.Type {
default:
- return nil, nil, fmt.Errorf("%s: %v: unknown ARM relocation type %v", pn, sectsyms[rsect], r.Type)
+ return nil, 0, fmt.Errorf("%s: %v: unknown ARM relocation type %v", pn, sectsyms[rsect], r.Type)
case IMAGE_REL_ARM_SECREL:
rp.Type = objabi.R_PCREL
@@ -324,11 +328,10 @@ func load(arch *sys.Arch, lookup func(string, int) *sym.Symbol, localSymVersion
}
}
- sort.Sort(sym.RelocByOff(rs[:rsect.NumberOfRelocations]))
+ sort.Sort(loader.RelocByOff(rs[:rsect.NumberOfRelocations]))
- s := sectsyms[rsect]
- s.R = rs
- s.R = s.R[:rsect.NumberOfRelocations]
+ bld := l.MakeSymbolUpdater(sectsyms[rsect])
+ bld.SetRelocs(rs[:rsect.NumberOfRelocations])
}
// enter sub-symbols into symbol table.
@@ -339,7 +342,7 @@ func load(arch *sys.Arch, lookup func(string, int) *sym.Symbol, localSymVersion
name, err := pesym.FullName(f.StringTable)
if err != nil {
- return nil, nil, err
+ return nil, 0, err
}
if name == "" {
continue
@@ -361,54 +364,56 @@ func load(arch *sys.Arch, lookup func(string, int) *sym.Symbol, localSymVersion
}
}
- s, err := readpesym(arch, lookup, f, pesym, sectsyms, localSymVersion)
+ bld, s, err := readpesym(l, arch, l.LookupOrCreateSym, f, pesym, sectsyms, localSymVersion)
if err != nil {
- return nil, nil, err
+ return nil, 0, err
}
if pesym.SectionNumber == 0 { // extern
- if s.Type == sym.SDYNIMPORT {
- s.SetPlt(-2) // flag for dynimport in PE object files.
+ if l.SymType(s) == sym.SDYNIMPORT {
+ bld = makeUpdater(l, bld, s)
+ bld.SetPlt(-2) // flag for dynimport in PE object files.
}
- if s.Type == sym.SXREF && pesym.Value > 0 { // global data
- s.Type = sym.SNOPTRDATA
- s.Size = int64(pesym.Value)
+ if l.SymType(s) == sym.SXREF && pesym.Value > 0 { // global data
+ bld = makeUpdater(l, bld, s)
+ bld.SetType(sym.SNOPTRDATA)
+ bld.SetSize(int64(pesym.Value))
}
continue
} else if pesym.SectionNumber > 0 && int(pesym.SectionNumber) <= len(f.Sections) {
sect = f.Sections[pesym.SectionNumber-1]
if _, found := sectsyms[sect]; !found {
- return nil, nil, fmt.Errorf("%s: %v: missing sect.sym", pn, s)
+ return nil, 0, fmt.Errorf("%s: %v: missing sect.sym", pn, s)
}
} else {
- return nil, nil, fmt.Errorf("%s: %v: sectnum < 0!", pn, s)
+ return nil, 0, fmt.Errorf("%s: %v: sectnum < 0!", pn, s)
}
if sect == nil {
- return nil, rsrc, nil
+ return nil, 0, nil
}
- if s.Outer != nil {
- if s.Attr.DuplicateOK() {
+ if l.OuterSym(s) != 0 {
+ if l.AttrDuplicateOK(s) {
continue
}
- return nil, nil, fmt.Errorf("%s: duplicate symbol reference: %s in both %s and %s", pn, s.Name, s.Outer.Name, sectsyms[sect].Name)
+ outerName := l.SymName(l.OuterSym(s))
+ sectName := l.SymName(sectsyms[sect])
+ return nil, 0, fmt.Errorf("%s: duplicate symbol reference: %s in both %s and %s", pn, l.SymName(s), outerName, sectName)
}
+ bld = makeUpdater(l, bld, s)
sectsym := sectsyms[sect]
- s.Sub = sectsym.Sub
- sectsym.Sub = s
- s.Type = sectsym.Type
- s.Attr |= sym.AttrSubSymbol
- s.Value = int64(pesym.Value)
- s.Size = 4
- s.Outer = sectsym
- if sectsym.Type == sym.STEXT {
- if s.Attr.External() && !s.Attr.DuplicateOK() {
- return nil, nil, fmt.Errorf("%s: duplicate symbol definition", s.Name)
+ bld.SetType(l.SymType(sectsym))
+ l.PrependSub(sectsym, s)
+ bld.SetValue(int64(pesym.Value))
+ bld.SetSize(4)
+ if l.SymType(sectsym) == sym.STEXT {
+ if bld.External() && !bld.DuplicateOK() {
+ return nil, 0, fmt.Errorf("%s: duplicate symbol definition", l.SymName(s))
}
- s.Attr |= sym.AttrExternal
+ bld.SetExternal(true)
}
}
@@ -416,23 +421,16 @@ func load(arch *sys.Arch, lookup func(string, int) *sym.Symbol, localSymVersion
// This keeps textp in increasing address order.
for _, sect := range f.Sections {
s := sectsyms[sect]
- if s == nil {
+ if s == 0 {
continue
}
- if s.Sub != nil {
- s.Sub = sym.SortSub(s.Sub)
- }
- if s.Type == sym.STEXT {
- if s.Attr.OnList() {
- return nil, nil, fmt.Errorf("symbol %s listed multiple times", s.Name)
- }
- s.Attr |= sym.AttrOnList
- textp = append(textp, s)
- for s = s.Sub; s != nil; s = s.Sub {
- if s.Attr.OnList() {
- return nil, nil, fmt.Errorf("symbol %s listed multiple times", s.Name)
+ l.SortSub(s)
+ if l.SymType(s) == sym.STEXT {
+ for ; s != 0; s = l.SubSym(s) {
+ if l.AttrOnList(s) {
+ return nil, 0, fmt.Errorf("symbol %s listed multiple times", l.SymName(s))
}
- s.Attr |= sym.AttrOnList
+ l.SetAttrOnList(s, true)
textp = append(textp, s)
}
}
@@ -445,14 +443,14 @@ func issect(s *pe.COFFSymbol) bool {
return s.StorageClass == IMAGE_SYM_CLASS_STATIC && s.Type == 0 && s.Name[0] == '.'
}
-func readpesym(arch *sys.Arch, lookup func(string, int) *sym.Symbol, f *pe.File, pesym *pe.COFFSymbol, sectsyms map[*pe.Section]*sym.Symbol, localSymVersion int) (*sym.Symbol, error) {
+func readpesym(l *loader.Loader, arch *sys.Arch, lookup func(string, int) loader.Sym, f *pe.File, pesym *pe.COFFSymbol, sectsyms map[*pe.Section]loader.Sym, localSymVersion int) (*loader.SymbolBuilder, loader.Sym, error) {
symname, err := pesym.FullName(f.StringTable)
if err != nil {
- return nil, err
+ return nil, 0, err
}
var name string
if issect(pesym) {
- name = sectsyms[f.Sections[pesym.SectionNumber-1]].Name
+ name = l.SymName(sectsyms[f.Sections[pesym.SectionNumber-1]])
} else {
name = symname
switch arch.Family {
@@ -483,10 +481,11 @@ func readpesym(arch *sys.Arch, lookup func(string, int) *sym.Symbol, f *pe.File,
name = name[:i]
}
- var s *sym.Symbol
+ var s loader.Sym
+ var bld *loader.SymbolBuilder
switch pesym.Type {
default:
- return nil, fmt.Errorf("%s: invalid symbol type %d", symname, pesym.Type)
+ return nil, 0, fmt.Errorf("%s: invalid symbol type %d", symname, pesym.Type)
case IMAGE_SYM_DTYPE_FUNCTION, IMAGE_SYM_DTYPE_NULL:
switch pesym.StorageClass {
@@ -495,19 +494,22 @@ func readpesym(arch *sys.Arch, lookup func(string, int) *sym.Symbol, f *pe.File,
case IMAGE_SYM_CLASS_NULL, IMAGE_SYM_CLASS_STATIC, IMAGE_SYM_CLASS_LABEL:
s = lookup(name, localSymVersion)
- s.Attr |= sym.AttrDuplicateOK
+ bld = makeUpdater(l, bld, s)
+ bld.SetDuplicateOK(true)
default:
- return nil, fmt.Errorf("%s: invalid symbol binding %d", symname, pesym.StorageClass)
+ return nil, 0, fmt.Errorf("%s: invalid symbol binding %d", symname, pesym.StorageClass)
}
}
- if s != nil && s.Type == 0 && (pesym.StorageClass != IMAGE_SYM_CLASS_STATIC || pesym.Value != 0) {
- s.Type = sym.SXREF
+ if s != 0 && l.SymType(s) == 0 && (pesym.StorageClass != IMAGE_SYM_CLASS_STATIC || pesym.Value != 0) {
+ bld = makeUpdater(l, bld, s)
+ bld.SetType(sym.SXREF)
}
if strings.HasPrefix(symname, "__imp_") {
- s.SetGot(-2) // flag for __imp_
+ bld = makeUpdater(l, bld, s)
+ bld.SetGot(-2) // flag for __imp_
}
- return s, nil
+ return bld, s, nil
}
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