debug/elf: add SHT_GNU_VERDEF section parsing

Fixes #63952

Change-Id: Icf93e57e62243d9c3306d4e1c5dadb3f62747710
GitHub-Last-Rev: 5c2952760063474f3aac338fe5bdb65bde238ab6
GitHub-Pull-Request: golang/go#69850
Reviewed-on: https://go-review.googlesource.com/c/go/+/619077
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: David Chase <drchase@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

diff --git a/api/next/63952.txt b/api/next/63952.txt
new file mode 100644 (file)
index 0000000..738e56f
--- /dev/null
+++ b/api/next/63952.txt
@@ -0,0 +1,33 @@
+pkg debug/elf, const VER_FLG_BASE = 1 #63952
+pkg debug/elf, const VER_FLG_BASE DynamicVersionFlag #63952
+pkg debug/elf, const VER_FLG_INFO = 4 #63952
+pkg debug/elf, const VER_FLG_INFO DynamicVersionFlag #63952
+pkg debug/elf, const VER_FLG_WEAK = 2 #63952
+pkg debug/elf, const VER_FLG_WEAK DynamicVersionFlag #63952
+pkg debug/elf, const VerFlagGlobal = 2 #63952
+pkg debug/elf, const VerFlagGlobal SymbolVersionFlag #63952
+pkg debug/elf, const VerFlagHidden = 4 #63952
+pkg debug/elf, const VerFlagHidden SymbolVersionFlag #63952
+pkg debug/elf, const VerFlagLocal = 1 #63952
+pkg debug/elf, const VerFlagLocal SymbolVersionFlag #63952
+pkg debug/elf, const VerFlagNone = 0 #63952
+pkg debug/elf, const VerFlagNone SymbolVersionFlag #63952
+pkg debug/elf, method (*File) DynamicVersionNeeds() ([]DynamicVersionNeed, error) #63952
+pkg debug/elf, method (*File) DynamicVersions() ([]DynamicVersion, error) #63952
+pkg debug/elf, type DynamicVersion struct #63952
+pkg debug/elf, type DynamicVersion struct, Deps []string #63952
+pkg debug/elf, type DynamicVersion struct, Flags DynamicVersionFlag #63952
+pkg debug/elf, type DynamicVersion struct, Index uint16 #63952
+pkg debug/elf, type DynamicVersion struct, Version uint16 #63952
+pkg debug/elf, type DynamicVersionDep struct #63952
+pkg debug/elf, type DynamicVersionDep struct, Dep string #63952
+pkg debug/elf, type DynamicVersionDep struct, Flags DynamicVersionFlag #63952
+pkg debug/elf, type DynamicVersionDep struct, Other uint16 #63952
+pkg debug/elf, type DynamicVersionFlag uint16 #63952
+pkg debug/elf, type DynamicVersionNeed struct #63952
+pkg debug/elf, type DynamicVersionNeed struct, Name string #63952
+pkg debug/elf, type DynamicVersionNeed struct, Needs []DynamicVersionDep #63952
+pkg debug/elf, type DynamicVersionNeed struct, Version uint16 #63952
+pkg debug/elf, type Symbol struct, VersionFlags SymbolVersionFlag #63952
+pkg debug/elf, type Symbol struct, VersionIndex int16 #63952
+pkg debug/elf, type SymbolVersionFlag uint8 #63952

diff --git a/doc/next/6-stdlib/99-minor/debug/elf/63952.md b/doc/next/6-stdlib/99-minor/debug/elf/63952.md
new file mode 100644 (file)
index 0000000..946673f
--- /dev/null
+++ b/doc/next/6-stdlib/99-minor/debug/elf/63952.md
@@ -0,0 +1,20 @@
+The [debug/elf] package adds several new constants, types, and methods to add support for handling dynamic versions and version flags in ELF (Executable and Linkable Format) files:
+
+Several new types have been introduced:
+- [DynamicVersion] struct represents a dynamic version entry in the ELF file.
+- [DynamicVersionDep] struct represents a dependency of a dynamic version.
+- [DynamicVersionNeed] struct represents a required dynamic version in the ELF file.
+- [DynamicVersionFlag] is a new type defined as uint16, representing flags for dynamic versions.
+    - [VER_FLG_BASE] version definition of the file.
+    - [VER_FLG_WEAK] weak version identifier.
+    - [VER_FLG_INFO] reference exists for informational purposes.
+- [SymbolVersionFlag] is a new type defined as uint8, representing version flags for ELF symbols.
+    - [VerFlagNone] no flags.
+    - [VerFlagLocal] symbol has local scope.
+    - [VerFlagGlobal] symbol has global scope.
+    - [VerFlagHidden] symbol is hidden.
+
+The following methods have been added:
+- [File.DynamicVersionNeeds] method returns a list of dynamic version needs in the ELF file, representing dependencies required by the executable.
+- [File.DynamicVersions] retrieves a list of dynamic versions defined in the ELF file.
+<!-- go.dev/issue/63952 -->
\ No newline at end of file

diff --git a/src/debug/elf/elf.go b/src/debug/elf/elf.go
index cecda61ed6e8331f2bb767eb9fde5fc9f86654ff..e902f84665d65bad8e7afa25742395360a01078e 100644 (file)
--- a/src/debug/elf/elf.go
+++ b/src/debug/elf/elf.go
@@ -3579,6 +3579,15 @@ type intName struct {
        s string
 }
 
+// Dynamic version flags.
+type DynamicVersionFlag uint16
+
+const (
+       VER_FLG_BASE DynamicVersionFlag = 0x1 /* Version definition of the file. */
+       VER_FLG_WEAK DynamicVersionFlag = 0x2 /* Weak version identifier. */
+       VER_FLG_INFO DynamicVersionFlag = 0x4 /* Reference exists for informational purposes. */
+)
+
 func stringName(i uint32, names []intName, goSyntax bool) string {
        for _, n := range names {
                if n.i == i {

diff --git a/src/debug/elf/file.go b/src/debug/elf/file.go
index 398439dcce6655c04b73a02c1f641185f802c739..05062f1433b5f53b906e3f7024560361a309a02c 100644 (file)
--- a/src/debug/elf/file.go
+++ b/src/debug/elf/file.go
@@ -52,11 +52,12 @@ type FileHeader struct {
 // A File represents an open ELF file.
 type File struct {
        FileHeader
-       Sections  []*Section
-       Progs     []*Prog
-       closer    io.Closer
-       gnuNeed   []verneed
-       gnuVersym []byte
+       Sections    []*Section
+       Progs       []*Prog
+       closer      io.Closer
+       dynVers     []DynamicVersion
+       dynVerNeeds []DynamicVersionNeed
+       gnuVersym   []byte
 }
 
 // A SectionHeader represents a single ELF section header.
@@ -207,11 +208,16 @@ func (p *Prog) Open() io.ReadSeeker { return io.NewSectionReader(p.sr, 0, 1<<63-
 type Symbol struct {
        Name        string
        Info, Other byte
+
+       // These fields are used for symbol versioning
+       // and are present only for the dynamic symbol table.
+       VersionIndex int16
+       VersionFlags SymbolVersionFlag
+
        Section     SectionIndex
        Value, Size uint64
 
-       // Version and Library are present only for the dynamic symbol
-       // table.
+       // These fields are present only for the dynamic symbol table.
        Version string
        Library string
 }
@@ -657,6 +663,7 @@ func (f *File) getSymbols32(typ SectionType) ([]Symbol, []byte, error) {
                symbols[i].Name = str
                symbols[i].Info = sym.Info
                symbols[i].Other = sym.Other
+               symbols[i].VersionIndex = -1
                symbols[i].Section = SectionIndex(sym.Shndx)
                symbols[i].Value = uint64(sym.Value)
                symbols[i].Size = uint64(sym.Size)
@@ -704,6 +711,7 @@ func (f *File) getSymbols64(typ SectionType) ([]Symbol, []byte, error) {
                symbols[i].Name = str
                symbols[i].Info = sym.Info
                symbols[i].Other = sym.Other
+               symbols[i].VersionIndex = -1
                symbols[i].Section = SectionIndex(sym.Shndx)
                symbols[i].Value = sym.Value
                symbols[i].Size = sym.Size
@@ -1446,7 +1454,7 @@ func (f *File) DynamicSymbols() ([]Symbol, error) {
        }
        if f.gnuVersionInit(str) {
                for i := range sym {
-                       sym[i].Library, sym[i].Version = f.gnuVersion(i)
+                       sym[i].VersionIndex, sym[i].Version, sym[i].Library, sym[i].VersionFlags = f.gnuVersion(i)
                }
        }
        return sym, nil
@@ -1473,22 +1481,121 @@ func (f *File) ImportedSymbols() ([]ImportedSymbol, error) {
                if ST_BIND(s.Info) == STB_GLOBAL && s.Section == SHN_UNDEF {
                        all = append(all, ImportedSymbol{Name: s.Name})
                        sym := &all[len(all)-1]
-                       sym.Library, sym.Version = f.gnuVersion(i)
+                       _, sym.Version, sym.Library, _ = f.gnuVersion(i)
                }
        }
        return all, nil
 }
 
-type verneed struct {
-       File string
-       Name string
+type SymbolVersionFlag byte
+
+const (
+       VerFlagNone   SymbolVersionFlag = 0x0 // No flags.
+       VerFlagLocal  SymbolVersionFlag = 0x1 // Symbol has local scope.
+       VerFlagGlobal SymbolVersionFlag = 0x2 // Symbol has global scope.
+       VerFlagHidden SymbolVersionFlag = 0x4 // Symbol is hidden.
+)
+
+// DynamicVersion is a version defined by a dynamic object.
+type DynamicVersion struct {
+       Version uint16 // Version of data structure.
+       Flags   DynamicVersionFlag
+       Index   uint16   // Version index.
+       Deps    []string // Dependencies.
 }
 
-// gnuVersionInit parses the GNU version tables
-// for use by calls to gnuVersion.
-func (f *File) gnuVersionInit(str []byte) bool {
-       if f.gnuNeed != nil {
-               // Already initialized
+type DynamicVersionNeed struct {
+       Version uint16              // Version of data structure.
+       Name    string              // Shared library name.
+       Needs   []DynamicVersionDep // Dependencies.
+}
+
+type DynamicVersionDep struct {
+       Flags DynamicVersionFlag
+       Other uint16 // Version index.
+       Dep   string // Name of required version.
+}
+
+// dynamicVersions returns version information for a dynamic object.
+func (f *File) dynamicVersions(str []byte) bool {
+       if f.dynVers != nil {
+               // Already initialized.
+               return true
+       }
+
+       // Accumulate verdef information.
+       vd := f.SectionByType(SHT_GNU_VERDEF)
+       if vd == nil {
+               return false
+       }
+       d, _ := vd.Data()
+
+       var dynVers []DynamicVersion
+       i := 0
+       for {
+               if i+20 > len(d) {
+                       break
+               }
+               version := f.ByteOrder.Uint16(d[i : i+2])
+               flags := DynamicVersionFlag(f.ByteOrder.Uint16(d[i+2 : i+4]))
+               ndx := f.ByteOrder.Uint16(d[i+4 : i+6])
+               cnt := f.ByteOrder.Uint16(d[i+6 : i+8])
+               aux := f.ByteOrder.Uint32(d[i+12 : i+16])
+               next := f.ByteOrder.Uint32(d[i+16 : i+20])
+
+               var depName string
+               var deps []string
+               j := i + int(aux)
+               for c := 0; c < int(cnt); c++ {
+                       if j+8 > len(d) {
+                               break
+                       }
+                       vname := f.ByteOrder.Uint32(d[j : j+4])
+                       vnext := f.ByteOrder.Uint32(d[j+4 : j+8])
+                       depName, _ = getString(str, int(vname))
+
+                       deps = append(deps, depName)
+
+                       j += int(vnext)
+               }
+
+               dynVers = append(dynVers, DynamicVersion{
+                       Version: version,
+                       Flags:   flags,
+                       Index:   ndx,
+                       Deps:    deps,
+               })
+
+               if next == 0 {
+                       break
+               }
+               i += int(next)
+       }
+
+       f.dynVers = dynVers
+
+       return true
+}
+
+// DynamicVersions returns version information for a dynamic object.
+func (f *File) DynamicVersions() ([]DynamicVersion, error) {
+       if f.dynVers == nil {
+               _, str, err := f.getSymbols(SHT_DYNSYM)
+               if err != nil {
+                       return nil, err
+               }
+               if !f.gnuVersionInit(str) {
+                       return nil, errors.New("DynamicVersions: missing version table")
+               }
+       }
+
+       return f.dynVers, nil
+}
+
+// dynamicVersionNeeds returns version dependencies for a dynamic object.
+func (f *File) dynamicVersionNeeds(str []byte) bool {
+       if f.dynVerNeeds != nil {
+               // Already initialized.
                return true
        }
 
@@ -1499,7 +1606,7 @@ func (f *File) gnuVersionInit(str []byte) bool {
        }
        d, _ := vn.Data()
 
-       var need []verneed
+       var dynVerNeeds []DynamicVersionNeed
        i := 0
        for {
                if i+16 > len(d) {
@@ -1515,68 +1622,124 @@ func (f *File) gnuVersionInit(str []byte) bool {
                next := f.ByteOrder.Uint32(d[i+12 : i+16])
                file, _ := getString(str, int(fileoff))
 
-               var name string
+               var deps []DynamicVersionDep
                j := i + int(aux)
                for c := 0; c < int(cnt); c++ {
                        if j+16 > len(d) {
                                break
                        }
-                       // hash := f.ByteOrder.Uint32(d[j:j+4])
-                       // flags := f.ByteOrder.Uint16(d[j+4:j+6])
+                       flags := DynamicVersionFlag(f.ByteOrder.Uint16(d[j+4 : j+6]))
                        other := f.ByteOrder.Uint16(d[j+6 : j+8])
                        nameoff := f.ByteOrder.Uint32(d[j+8 : j+12])
                        next := f.ByteOrder.Uint32(d[j+12 : j+16])
-                       name, _ = getString(str, int(nameoff))
-                       ndx := int(other)
-                       if ndx >= len(need) {
-                               a := make([]verneed, 2*(ndx+1))
-                               copy(a, need)
-                               need = a
-                       }
+                       depName, _ := getString(str, int(nameoff))
+
+                       deps = append(deps, DynamicVersionDep{
+                               Flags: flags,
+                               Other: other,
+                               Dep:   depName,
+                       })
 
-                       need[ndx] = verneed{file, name}
                        if next == 0 {
                                break
                        }
                        j += int(next)
                }
 
+               dynVerNeeds = append(dynVerNeeds, DynamicVersionNeed{
+                       Version: vers,
+                       Name:    file,
+                       Needs:   deps,
+               })
+
                if next == 0 {
                        break
                }
                i += int(next)
        }
 
+       f.dynVerNeeds = dynVerNeeds
+
+       return true
+}
+
+// DynamicVersionNeeds returns version dependencies for a dynamic object.
+func (f *File) DynamicVersionNeeds() ([]DynamicVersionNeed, error) {
+       if f.dynVerNeeds == nil {
+               _, str, err := f.getSymbols(SHT_DYNSYM)
+               if err != nil {
+                       return nil, err
+               }
+               if !f.gnuVersionInit(str) {
+                       return nil, errors.New("DynamicVersionNeeds: missing version table")
+               }
+       }
+
+       return f.dynVerNeeds, nil
+}
+
+// gnuVersionInit parses the GNU version tables
+// for use by calls to gnuVersion.
+func (f *File) gnuVersionInit(str []byte) bool {
        // Versym parallels symbol table, indexing into verneed.
        vs := f.SectionByType(SHT_GNU_VERSYM)
        if vs == nil {
                return false
        }
-       d, _ = vs.Data()
+       d, _ := vs.Data()
 
-       f.gnuNeed = need
        f.gnuVersym = d
+       f.dynamicVersions(str)
+       f.dynamicVersionNeeds(str)
        return true
 }
 
 // gnuVersion adds Library and Version information to sym,
 // which came from offset i of the symbol table.
-func (f *File) gnuVersion(i int) (library string, version string) {
+func (f *File) gnuVersion(i int) (versionIndex int16, version string, library string, versionFlags SymbolVersionFlag) {
        // Each entry is two bytes; skip undef entry at beginning.
        i = (i + 1) * 2
        if i >= len(f.gnuVersym) {
-               return
+               return -1, "", "", VerFlagNone
        }
        s := f.gnuVersym[i:]
        if len(s) < 2 {
-               return
+               return -1, "", "", VerFlagNone
+       }
+       j := int32(f.ByteOrder.Uint16(s))
+       var ndx = int16(j & 0x7fff)
+
+       if ndx == 0 {
+               return ndx, "", "", VerFlagLocal
+       } else if ndx == 1 {
+               return ndx, "", "", VerFlagGlobal
+       }
+
+       if ndx < 2 {
+               return 0, "", "", VerFlagNone
+       }
+
+       for _, v := range f.dynVerNeeds {
+               for _, n := range v.Needs {
+                       if uint16(ndx) == n.Other {
+                               return ndx, n.Dep, v.Name, VerFlagHidden
+                       }
+               }
        }
-       j := int(f.ByteOrder.Uint16(s))
-       if j < 2 || j >= len(f.gnuNeed) {
-               return
+
+       for _, v := range f.dynVers {
+               if uint16(ndx) == v.Index {
+                       if len(v.Deps) > 0 {
+                               flags := VerFlagNone
+                               if j&0x8000 != 0 {
+                                       flags = VerFlagHidden
+                               }
+                               return ndx, v.Deps[0], "", flags
+                       }
+               }
        }
-       n := &f.gnuNeed[j]
-       return n.File, n.Name
+
+       return -1, "", "", VerFlagNone
 }
 
 // ImportedLibraries returns the names of all libraries

diff --git a/src/debug/elf/file_test.go b/src/debug/elf/file_test.go
index 5dd83a2917618dd76471062546c8adfba98ea7dd..55d58b323405cd0c0b4eb5e1016a286168e92e4d 100644 (file)
--- a/src/debug/elf/file_test.go
+++ b/src/debug/elf/file_test.go
@@ -78,80 +78,80 @@ var fileTests = []fileTest{
                },
                []string{"libc.so.6"},
                []Symbol{
-                       {"", 3, 0, 1, 134512852, 0, "", ""},
-                       {"", 3, 0, 2, 134512876, 0, "", ""},
-                       {"", 3, 0, 3, 134513020, 0, "", ""},
-                       {"", 3, 0, 4, 134513292, 0, "", ""},
-                       {"", 3, 0, 5, 134513480, 0, "", ""},
-                       {"", 3, 0, 6, 134513512, 0, "", ""},
-                       {"", 3, 0, 7, 134513532, 0, "", ""},
-                       {"", 3, 0, 8, 134513612, 0, "", ""},
-                       {"", 3, 0, 9, 134513996, 0, "", ""},
-                       {"", 3, 0, 10, 134514008, 0, "", ""},
-                       {"", 3, 0, 11, 134518268, 0, "", ""},
-                       {"", 3, 0, 12, 134518280, 0, "", ""},
-                       {"", 3, 0, 13, 134518284, 0, "", ""},
-                       {"", 3, 0, 14, 134518436, 0, "", ""},
-                       {"", 3, 0, 15, 134518444, 0, "", ""},
-                       {"", 3, 0, 16, 134518452, 0, "", ""},
-                       {"", 3, 0, 17, 134518456, 0, "", ""},
-                       {"", 3, 0, 18, 134518484, 0, "", ""},
-                       {"", 3, 0, 19, 0, 0, "", ""},
-                       {"", 3, 0, 20, 0, 0, "", ""},
-                       {"", 3, 0, 21, 0, 0, "", ""},
-                       {"", 3, 0, 22, 0, 0, "", ""},
-                       {"", 3, 0, 23, 0, 0, "", ""},
-                       {"", 3, 0, 24, 0, 0, "", ""},
-                       {"", 3, 0, 25, 0, 0, "", ""},
-                       {"", 3, 0, 26, 0, 0, "", ""},
-                       {"", 3, 0, 27, 0, 0, "", ""},
-                       {"", 3, 0, 28, 0, 0, "", ""},
-                       {"", 3, 0, 29, 0, 0, "", ""},
-                       {"crt1.c", 4, 0, 65521, 0, 0, "", ""},
-                       {"/usr/src/lib/csu/i386-elf/crti.S", 4, 0, 65521, 0, 0, "", ""},
-                       {"<command line>", 4, 0, 65521, 0, 0, "", ""},
-                       {"<built-in>", 4, 0, 65521, 0, 0, "", ""},
-                       {"/usr/src/lib/csu/i386-elf/crti.S", 4, 0, 65521, 0, 0, "", ""},
-                       {"crtstuff.c", 4, 0, 65521, 0, 0, "", ""},
-                       {"__CTOR_LIST__", 1, 0, 14, 134518436, 0, "", ""},
-                       {"__DTOR_LIST__", 1, 0, 15, 134518444, 0, "", ""},
-                       {"__EH_FRAME_BEGIN__", 1, 0, 12, 134518280, 0, "", ""},
-                       {"__JCR_LIST__", 1, 0, 16, 134518452, 0, "", ""},
-                       {"p.0", 1, 0, 11, 134518276, 0, "", ""},
-                       {"completed.1", 1, 0, 18, 134518484, 1, "", ""},
-                       {"__do_global_dtors_aux", 2, 0, 8, 134513760, 0, "", ""},
-                       {"object.2", 1, 0, 18, 134518488, 24, "", ""},
-                       {"frame_dummy", 2, 0, 8, 134513836, 0, "", ""},
-                       {"crtstuff.c", 4, 0, 65521, 0, 0, "", ""},
-                       {"__CTOR_END__", 1, 0, 14, 134518440, 0, "", ""},
-                       {"__DTOR_END__", 1, 0, 15, 134518448, 0, "", ""},
-                       {"__FRAME_END__", 1, 0, 12, 134518280, 0, "", ""},
-                       {"__JCR_END__", 1, 0, 16, 134518452, 0, "", ""},
-                       {"__do_global_ctors_aux", 2, 0, 8, 134513960, 0, "", ""},
-                       {"/usr/src/lib/csu/i386-elf/crtn.S", 4, 0, 65521, 0, 0, "", ""},
-                       {"<command line>", 4, 0, 65521, 0, 0, "", ""},
-                       {"<built-in>", 4, 0, 65521, 0, 0, "", ""},
-                       {"/usr/src/lib/csu/i386-elf/crtn.S", 4, 0, 65521, 0, 0, "", ""},
-                       {"hello.c", 4, 0, 65521, 0, 0, "", ""},
-                       {"printf", 18, 0, 0, 0, 44, "", ""},
-                       {"_DYNAMIC", 17, 0, 65521, 134518284, 0, "", ""},
-                       {"__dso_handle", 17, 2, 11, 134518272, 0, "", ""},
-                       {"_init", 18, 0, 6, 134513512, 0, "", ""},
-                       {"environ", 17, 0, 18, 134518512, 4, "", ""},
-                       {"__deregister_frame_info", 32, 0, 0, 0, 0, "", ""},
-                       {"__progname", 17, 0, 11, 134518268, 4, "", ""},
-                       {"_start", 18, 0, 8, 134513612, 145, "", ""},
-                       {"__bss_start", 16, 0, 65521, 134518484, 0, "", ""},
-                       {"main", 18, 0, 8, 134513912, 46, "", ""},
-                       {"_init_tls", 18, 0, 0, 0, 5, "", ""},
-                       {"_fini", 18, 0, 9, 134513996, 0, "", ""},
-                       {"atexit", 18, 0, 0, 0, 43, "", ""},
-                       {"_edata", 16, 0, 65521, 134518484, 0, "", ""},
-                       {"_GLOBAL_OFFSET_TABLE_", 17, 0, 65521, 134518456, 0, "", ""},
-                       {"_end", 16, 0, 65521, 134518516, 0, "", ""},
-                       {"exit", 18, 0, 0, 0, 68, "", ""},
-                       {"_Jv_RegisterClasses", 32, 0, 0, 0, 0, "", ""},
-                       {"__register_frame_info", 32, 0, 0, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 1, 134512852, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 2, 134512876, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 3, 134513020, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 4, 134513292, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 5, 134513480, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 6, 134513512, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 7, 134513532, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 8, 134513612, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 9, 134513996, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 10, 134514008, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 11, 134518268, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 12, 134518280, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 13, 134518284, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 14, 134518436, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 15, 134518444, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 16, 134518452, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 17, 134518456, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 18, 134518484, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 19, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 20, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 21, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 22, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 23, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 24, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 25, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 26, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 27, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 28, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 29, 0, 0, "", ""},
+                       {"crt1.c", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"/usr/src/lib/csu/i386-elf/crti.S", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"<command line>", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"<built-in>", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"/usr/src/lib/csu/i386-elf/crti.S", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"crtstuff.c", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"__CTOR_LIST__", 1, 0, -1, VerFlagNone, 14, 134518436, 0, "", ""},
+                       {"__DTOR_LIST__", 1, 0, -1, VerFlagNone, 15, 134518444, 0, "", ""},
+                       {"__EH_FRAME_BEGIN__", 1, 0, -1, VerFlagNone, 12, 134518280, 0, "", ""},
+                       {"__JCR_LIST__", 1, 0, -1, VerFlagNone, 16, 134518452, 0, "", ""},
+                       {"p.0", 1, 0, -1, VerFlagNone, 11, 134518276, 0, "", ""},
+                       {"completed.1", 1, 0, -1, VerFlagNone, 18, 134518484, 1, "", ""},
+                       {"__do_global_dtors_aux", 2, 0, -1, VerFlagNone, 8, 134513760, 0, "", ""},
+                       {"object.2", 1, 0, -1, VerFlagNone, 18, 134518488, 24, "", ""},
+                       {"frame_dummy", 2, 0, -1, VerFlagNone, 8, 134513836, 0, "", ""},
+                       {"crtstuff.c", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"__CTOR_END__", 1, 0, -1, VerFlagNone, 14, 134518440, 0, "", ""},
+                       {"__DTOR_END__", 1, 0, -1, VerFlagNone, 15, 134518448, 0, "", ""},
+                       {"__FRAME_END__", 1, 0, -1, VerFlagNone, 12, 134518280, 0, "", ""},
+                       {"__JCR_END__", 1, 0, -1, VerFlagNone, 16, 134518452, 0, "", ""},
+                       {"__do_global_ctors_aux", 2, 0, -1, VerFlagNone, 8, 134513960, 0, "", ""},
+                       {"/usr/src/lib/csu/i386-elf/crtn.S", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"<command line>", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"<built-in>", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"/usr/src/lib/csu/i386-elf/crtn.S", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"hello.c", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"printf", 18, 0, -1, VerFlagNone, 0, 0, 44, "", ""},
+                       {"_DYNAMIC", 17, 0, -1, VerFlagNone, 65521, 134518284, 0, "", ""},
+                       {"__dso_handle", 17, 2, -1, VerFlagNone, 11, 134518272, 0, "", ""},
+                       {"_init", 18, 0, -1, VerFlagNone, 6, 134513512, 0, "", ""},
+                       {"environ", 17, 0, -1, VerFlagNone, 18, 134518512, 4, "", ""},
+                       {"__deregister_frame_info", 32, 0, -1, VerFlagNone, 0, 0, 0, "", ""},
+                       {"__progname", 17, 0, -1, VerFlagNone, 11, 134518268, 4, "", ""},
+                       {"_start", 18, 0, -1, VerFlagNone, 8, 134513612, 145, "", ""},
+                       {"__bss_start", 16, 0, -1, VerFlagNone, 65521, 134518484, 0, "", ""},
+                       {"main", 18, 0, -1, VerFlagNone, 8, 134513912, 46, "", ""},
+                       {"_init_tls", 18, 0, -1, VerFlagNone, 0, 0, 5, "", ""},
+                       {"_fini", 18, 0, -1, VerFlagNone, 9, 134513996, 0, "", ""},
+                       {"atexit", 18, 0, -1, VerFlagNone, 0, 0, 43, "", ""},
+                       {"_edata", 16, 0, -1, VerFlagNone, 65521, 134518484, 0, "", ""},
+                       {"_GLOBAL_OFFSET_TABLE_", 17, 0, -1, VerFlagNone, 65521, 134518456, 0, "", ""},
+                       {"_end", 16, 0, -1, VerFlagNone, 65521, 134518516, 0, "", ""},
+                       {"exit", 18, 0, -1, VerFlagNone, 0, 0, 68, "", ""},
+                       {"_Jv_RegisterClasses", 32, 0, -1, VerFlagNone, 0, 0, 0, "", ""},
+                       {"__register_frame_info", 32, 0, -1, VerFlagNone, 0, 0, 0, "", ""},
                },
        },
        {
@@ -208,79 +208,79 @@ var fileTests = []fileTest{
                },
                []string{"libc.so.6"},
                []Symbol{
-                       {"", 3, 0, 1, 4194816, 0, "", ""},
-                       {"", 3, 0, 2, 4194844, 0, "", ""},
-                       {"", 3, 0, 3, 4194880, 0, "", ""},
-                       {"", 3, 0, 4, 4194920, 0, "", ""},
-                       {"", 3, 0, 5, 4194952, 0, "", ""},
-                       {"", 3, 0, 6, 4195048, 0, "", ""},
-                       {"", 3, 0, 7, 4195110, 0, "", ""},
-                       {"", 3, 0, 8, 4195120, 0, "", ""},
-                       {"", 3, 0, 9, 4195152, 0, "", ""},
-                       {"", 3, 0, 10, 4195176, 0, "", ""},
-                       {"", 3, 0, 11, 4195224, 0, "", ""},
-                       {"", 3, 0, 12, 4195248, 0, "", ""},
-                       {"", 3, 0, 13, 4195296, 0, "", ""},
-                       {"", 3, 0, 14, 4195732, 0, "", ""},
-                       {"", 3, 0, 15, 4195748, 0, "", ""},
-                       {"", 3, 0, 16, 4195768, 0, "", ""},
-                       {"", 3, 0, 17, 4195808, 0, "", ""},
-                       {"", 3, 0, 18, 6293128, 0, "", ""},
-                       {"", 3, 0, 19, 6293144, 0, "", ""},
-                       {"", 3, 0, 20, 6293160, 0, "", ""},
-                       {"", 3, 0, 21, 6293168, 0, "", ""},
-                       {"", 3, 0, 22, 6293584, 0, "", ""},
-                       {"", 3, 0, 23, 6293592, 0, "", ""},
-                       {"", 3, 0, 24, 6293632, 0, "", ""},
-                       {"", 3, 0, 25, 6293656, 0, "", ""},
-                       {"", 3, 0, 26, 0, 0, "", ""},
-                       {"", 3, 0, 27, 0, 0, "", ""},
-                       {"", 3, 0, 28, 0, 0, "", ""},
-                       {"", 3, 0, 29, 0, 0, "", ""},
-                       {"", 3, 0, 30, 0, 0, "", ""},
-                       {"", 3, 0, 31, 0, 0, "", ""},
-                       {"", 3, 0, 32, 0, 0, "", ""},
-                       {"", 3, 0, 33, 0, 0, "", ""},
-                       {"init.c", 4, 0, 65521, 0, 0, "", ""},
-                       {"initfini.c", 4, 0, 65521, 0, 0, "", ""},
-                       {"call_gmon_start", 2, 0, 13, 4195340, 0, "", ""},
-                       {"crtstuff.c", 4, 0, 65521, 0, 0, "", ""},
-                       {"__CTOR_LIST__", 1, 0, 18, 6293128, 0, "", ""},
-                       {"__DTOR_LIST__", 1, 0, 19, 6293144, 0, "", ""},
-                       {"__JCR_LIST__", 1, 0, 20, 6293160, 0, "", ""},
-                       {"__do_global_dtors_aux", 2, 0, 13, 4195376, 0, "", ""},
-                       {"completed.6183", 1, 0, 25, 6293656, 1, "", ""},
-                       {"p.6181", 1, 0, 24, 6293648, 0, "", ""},
-                       {"frame_dummy", 2, 0, 13, 4195440, 0, "", ""},
-                       {"crtstuff.c", 4, 0, 65521, 0, 0, "", ""},
-                       {"__CTOR_END__", 1, 0, 18, 6293136, 0, "", ""},
-                       {"__DTOR_END__", 1, 0, 19, 6293152, 0, "", ""},
-                       {"__FRAME_END__", 1, 0, 17, 4195968, 0, "", ""},
-                       {"__JCR_END__", 1, 0, 20, 6293160, 0, "", ""},
-                       {"__do_global_ctors_aux", 2, 0, 13, 4195680, 0, "", ""},
-                       {"initfini.c", 4, 0, 65521, 0, 0, "", ""},
-                       {"hello.c", 4, 0, 65521, 0, 0, "", ""},
-                       {"_GLOBAL_OFFSET_TABLE_", 1, 2, 23, 6293592, 0, "", ""},
-                       {"__init_array_end", 0, 2, 18, 6293124, 0, "", ""},
-                       {"__init_array_start", 0, 2, 18, 6293124, 0, "", ""},
-                       {"_DYNAMIC", 1, 2, 21, 6293168, 0, "", ""},
-                       {"data_start", 32, 0, 24, 6293632, 0, "", ""},
-                       {"__libc_csu_fini", 18, 0, 13, 4195520, 2, "", ""},
-                       {"_start", 18, 0, 13, 4195296, 0, "", ""},
-                       {"__gmon_start__", 32, 0, 0, 0, 0, "", ""},
-                       {"_Jv_RegisterClasses", 32, 0, 0, 0, 0, "", ""},
-                       {"puts@@GLIBC_2.2.5", 18, 0, 0, 0, 396, "", ""},
-                       {"_fini", 18, 0, 14, 4195732, 0, "", ""},
-                       {"__libc_start_main@@GLIBC_2.2.5", 18, 0, 0, 0, 450, "", ""},
-                       {"_IO_stdin_used", 17, 0, 15, 4195748, 4, "", ""},
-                       {"__data_start", 16, 0, 24, 6293632, 0, "", ""},
-                       {"__dso_handle", 17, 2, 24, 6293640, 0, "", ""},
-                       {"__libc_csu_init", 18, 0, 13, 4195536, 137, "", ""},
-                       {"__bss_start", 16, 0, 65521, 6293656, 0, "", ""},
-                       {"_end", 16, 0, 65521, 6293664, 0, "", ""},
-                       {"_edata", 16, 0, 65521, 6293656, 0, "", ""},
-                       {"main", 18, 0, 13, 4195480, 27, "", ""},
-                       {"_init", 18, 0, 11, 4195224, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 1, 4194816, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 2, 4194844, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 3, 4194880, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 4, 4194920, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 5, 4194952, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 6, 4195048, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 7, 4195110, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 8, 4195120, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 9, 4195152, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 10, 4195176, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 11, 4195224, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 12, 4195248, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 13, 4195296, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 14, 4195732, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 15, 4195748, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 16, 4195768, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 17, 4195808, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 18, 6293128, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 19, 6293144, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 20, 6293160, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 21, 6293168, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 22, 6293584, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 23, 6293592, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 24, 6293632, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 25, 6293656, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 26, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 27, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 28, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 29, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 30, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 31, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 32, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 33, 0, 0, "", ""},
+                       {"init.c", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"initfini.c", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"call_gmon_start", 2, 0, -1, VerFlagNone, 13, 4195340, 0, "", ""},
+                       {"crtstuff.c", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"__CTOR_LIST__", 1, 0, -1, VerFlagNone, 18, 6293128, 0, "", ""},
+                       {"__DTOR_LIST__", 1, 0, -1, VerFlagNone, 19, 6293144, 0, "", ""},
+                       {"__JCR_LIST__", 1, 0, -1, VerFlagNone, 20, 6293160, 0, "", ""},
+                       {"__do_global_dtors_aux", 2, 0, -1, VerFlagNone, 13, 4195376, 0, "", ""},
+                       {"completed.6183", 1, 0, -1, VerFlagNone, 25, 6293656, 1, "", ""},
+                       {"p.6181", 1, 0, -1, VerFlagNone, 24, 6293648, 0, "", ""},
+                       {"frame_dummy", 2, 0, -1, VerFlagNone, 13, 4195440, 0, "", ""},
+                       {"crtstuff.c", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"__CTOR_END__", 1, 0, -1, VerFlagNone, 18, 6293136, 0, "", ""},
+                       {"__DTOR_END__", 1, 0, -1, VerFlagNone, 19, 6293152, 0, "", ""},
+                       {"__FRAME_END__", 1, 0, -1, VerFlagNone, 17, 4195968, 0, "", ""},
+                       {"__JCR_END__", 1, 0, -1, VerFlagNone, 20, 6293160, 0, "", ""},
+                       {"__do_global_ctors_aux", 2, 0, -1, VerFlagNone, 13, 4195680, 0, "", ""},
+                       {"initfini.c", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"hello.c", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"_GLOBAL_OFFSET_TABLE_", 1, 2, -1, VerFlagNone, 23, 6293592, 0, "", ""},
+                       {"__init_array_end", 0, 2, -1, VerFlagNone, 18, 6293124, 0, "", ""},
+                       {"__init_array_start", 0, 2, -1, VerFlagNone, 18, 6293124, 0, "", ""},
+                       {"_DYNAMIC", 1, 2, -1, VerFlagNone, 21, 6293168, 0, "", ""},
+                       {"data_start", 32, 0, -1, VerFlagNone, 24, 6293632, 0, "", ""},
+                       {"__libc_csu_fini", 18, 0, -1, VerFlagNone, 13, 4195520, 2, "", ""},
+                       {"_start", 18, 0, -1, VerFlagNone, 13, 4195296, 0, "", ""},
+                       {"__gmon_start__", 32, 0, -1, VerFlagNone, 0, 0, 0, "", ""},
+                       {"_Jv_RegisterClasses", 32, 0, -1, VerFlagNone, 0, 0, 0, "", ""},
+                       {"puts@@GLIBC_2.2.5", 18, 0, -1, VerFlagNone, 0, 0, 396, "", ""},
+                       {"_fini", 18, 0, -1, VerFlagNone, 14, 4195732, 0, "", ""},
+                       {"__libc_start_main@@GLIBC_2.2.5", 18, 0, -1, VerFlagNone, 0, 0, 450, "", ""},
+                       {"_IO_stdin_used", 17, 0, -1, VerFlagNone, 15, 4195748, 4, "", ""},
+                       {"__data_start", 16, 0, -1, VerFlagNone, 24, 6293632, 0, "", ""},
+                       {"__dso_handle", 17, 2, -1, VerFlagNone, 24, 6293640, 0, "", ""},
+                       {"__libc_csu_init", 18, 0, -1, VerFlagNone, 13, 4195536, 137, "", ""},
+                       {"__bss_start", 16, 0, -1, VerFlagNone, 65521, 6293656, 0, "", ""},
+                       {"_end", 16, 0, -1, VerFlagNone, 65521, 6293664, 0, "", ""},
+                       {"_edata", 16, 0, -1, VerFlagNone, 65521, 6293656, 0, "", ""},
+                       {"main", 18, 0, -1, VerFlagNone, 13, 4195480, 27, "", ""},
+                       {"_init", 18, 0, -1, VerFlagNone, 11, 4195224, 0, "", ""},
                },
        },
        {
@@ -338,21 +338,21 @@ var fileTests = []fileTest{
                []ProgHeader{},
                nil,
                []Symbol{
-                       {"hello.c", 4, 0, 65521, 0, 0, "", ""},
-                       {"", 3, 0, 1, 0, 0, "", ""},
-                       {"", 3, 0, 3, 0, 0, "", ""},
-                       {"", 3, 0, 4, 0, 0, "", ""},
-                       {"", 3, 0, 5, 0, 0, "", ""},
-                       {"", 3, 0, 6, 0, 0, "", ""},
-                       {"", 3, 0, 8, 0, 0, "", ""},
-                       {"", 3, 0, 9, 0, 0, "", ""},
-                       {"", 3, 0, 11, 0, 0, "", ""},
-                       {"", 3, 0, 13, 0, 0, "", ""},
-                       {"", 3, 0, 15, 0, 0, "", ""},
-                       {"", 3, 0, 16, 0, 0, "", ""},
-                       {"", 3, 0, 14, 0, 0, "", ""},
-                       {"main", 18, 0, 1, 0, 23, "", ""},
-                       {"puts", 16, 0, 0, 0, 0, "", ""},
+                       {"hello.c", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 1, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 3, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 4, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 5, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 6, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 8, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 9, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 11, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 13, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 15, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 16, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 14, 0, 0, "", ""},
+                       {"main", 18, 0, -1, VerFlagNone, 1, 0, 23, "", ""},
+                       {"puts", 16, 0, -1, VerFlagNone, 0, 0, 0, "", ""},
                },
        },
        {
@@ -384,21 +384,21 @@ var fileTests = []fileTest{
                []ProgHeader{},
                nil,
                []Symbol{
-                       {"hello.c", 4, 0, 65521, 0, 0, "", ""},
-                       {"", 3, 0, 1, 0, 0, "", ""},
-                       {"", 3, 0, 3, 0, 0, "", ""},
-                       {"", 3, 0, 4, 0, 0, "", ""},
-                       {"", 3, 0, 5, 0, 0, "", ""},
-                       {"", 3, 0, 6, 0, 0, "", ""},
-                       {"", 3, 0, 8, 0, 0, "", ""},
-                       {"", 3, 0, 9, 0, 0, "", ""},
-                       {"", 3, 0, 11, 0, 0, "", ""},
-                       {"", 3, 0, 13, 0, 0, "", ""},
-                       {"", 3, 0, 15, 0, 0, "", ""},
-                       {"", 3, 0, 16, 0, 0, "", ""},
-                       {"", 3, 0, 14, 0, 0, "", ""},
-                       {"main", 18, 0, 1, 0, 27, "", ""},
-                       {"puts", 16, 0, 0, 0, 0, "", ""},
+                       {"hello.c", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 1, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 3, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 4, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 5, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 6, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 8, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 9, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 11, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 13, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 15, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 16, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 14, 0, 0, "", ""},
+                       {"main", 18, 0, -1, VerFlagNone, 1, 0, 27, "", ""},
+                       {"puts", 16, 0, -1, VerFlagNone, 0, 0, 0, "", ""},
                },
        },
        {
@@ -430,21 +430,21 @@ var fileTests = []fileTest{
                []ProgHeader{},
                nil,
                []Symbol{
-                       {"hello.c", 4, 0, 65521, 0, 0, "", ""},
-                       {"", 3, 0, 1, 0, 0, "", ""},
-                       {"", 3, 0, 3, 0, 0, "", ""},
-                       {"", 3, 0, 4, 0, 0, "", ""},
-                       {"", 3, 0, 5, 0, 0, "", ""},
-                       {"", 3, 0, 6, 0, 0, "", ""},
-                       {"", 3, 0, 8, 0, 0, "", ""},
-                       {"", 3, 0, 9, 0, 0, "", ""},
-                       {"", 3, 0, 11, 0, 0, "", ""},
-                       {"", 3, 0, 13, 0, 0, "", ""},
-                       {"", 3, 0, 15, 0, 0, "", ""},
-                       {"", 3, 0, 16, 0, 0, "", ""},
-                       {"", 3, 0, 14, 0, 0, "", ""},
-                       {"main", 18, 0, 1, 0, 44, "", ""},
-                       {"puts", 16, 0, 0, 0, 0, "", ""},
+                       {"hello.c", 4, 0, -1, VerFlagNone, 65521, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 1, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 3, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 4, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 5, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 6, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 8, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 9, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 11, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 13, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 15, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 16, 0, 0, "", ""},
+                       {"", 3, 0, -1, VerFlagNone, 14, 0, 0, "", ""},
+                       {"main", 18, 0, -1, VerFlagNone, 1, 0, 44, "", ""},
+                       {"puts", 16, 0, -1, VerFlagNone, 0, 0, 0, "", ""},
                },
        },
 }

diff --git a/src/debug/elf/symbols_test.go b/src/debug/elf/symbols_test.go
index 42f02312e871dda91417d861480631f5ef2e22e5..ecc897b4a8aff689c5ae1106319df42fa7f76cdd 100644 (file)
--- a/src/debug/elf/symbols_test.go
+++ b/src/debug/elf/symbols_test.go
@@ -53,750 +53,936 @@ func TestSymbols(t *testing.T) {
 var symbolsGolden = map[string][]Symbol{
        "testdata/gcc-amd64-linux-exec": {
                Symbol{
-                       Name:    "",
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+                       Section:      0x10,
+                       Value:        0x0,
+                       Size:         0x0,
+               },
+               Symbol{
+                       Name:         "v",
+                       Info:         0x11,
+                       Other:        0x0,
+                       VersionIndex: -1,
+                       VersionFlags: VerFlagNone,
+                       Section:      0xFFF2,
+                       Value:        0x4,
+                       Size:         0x4,
                },
        },
        "testdata/hello-world-core.gz": {},
@@ -805,34 +991,324 @@ var symbolsGolden = map[string][]Symbol{
 var dynamicSymbolsGolden = map[string][]Symbol{
        "testdata/gcc-amd64-linux-exec": {
                Symbol{
-                       Name:    "__gmon_start__",
-                       Info:    0x20,
-                       Other:   0x0,
-                       Section: 0x0,
-                       Value:   0x0,
-                       Size:    0x0,
-               },
-               Symbol{
-                       Name:    "puts",
-                       Info:    0x12,
-                       Other:   0x0,
-                       Section: 0x0,
-                       Value:   0x0,
-                       Size:    0x18C,
-                       Version: "GLIBC_2.2.5",
-                       Library: "libc.so.6",
-               },
-               Symbol{
-                       Name:    "__libc_start_main",
-                       Info:    0x12,
-                       Other:   0x0,
-                       Section: 0x0,
-                       Value:   0x0,
-                       Size:    0x1C2,
-                       Version: "GLIBC_2.2.5",
-                       Library: "libc.so.6",
+                       Name:         "__gmon_start__",
+                       Info:         0x20,
+                       Other:        0x0,
+                       VersionIndex: 0x0,
+                       VersionFlags: VerFlagLocal,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+               },
+               Symbol{
+                       Name:         "puts",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x2,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x18C,
+                       Version:      "GLIBC_2.2.5",
+                       Library:      "libc.so.6",
+               },
+               Symbol{
+                       Name:         "__libc_start_main",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x2,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x1C2,
+                       Version:      "GLIBC_2.2.5",
+                       Library:      "libc.so.6",
                },
        },
        "testdata/go-relocation-test-clang-x86.obj": {},
        "testdata/hello-world-core.gz":              {},
+       "testdata/libtiffxx.so_": {
+               Symbol{
+                       Name:         "_ZNSo3putEc",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x3,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBCXX_3.4",
+                       Library:      "libstdc++.so.6",
+               },
+               Symbol{
+                       Name:         "strchr",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x4,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBC_2.2.5",
+                       Library:      "libc.so.6",
+               },
+               Symbol{
+                       Name:         "__cxa_finalize",
+                       Info:         0x22,
+                       Other:        0x0,
+                       VersionIndex: 0x4,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBC_2.2.5",
+                       Library:      "libc.so.6",
+               },
+               Symbol{
+                       Name:         "_ZNSo5tellpEv",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x3,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBCXX_3.4",
+                       Library:      "libstdc++.so.6",
+               },
+               Symbol{
+                       Name:         "_ZNSo5seekpElSt12_Ios_Seekdir",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x3,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBCXX_3.4",
+                       Library:      "libstdc++.so.6",
+               },
+               Symbol{
+                       Name:         "_Znwm",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x3,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBCXX_3.4",
+                       Library:      "libstdc++.so.6",
+               },
+               Symbol{
+                       Name:         "_ZdlPvm",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x5,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "CXXABI_1.3.9",
+                       Library:      "libstdc++.so.6",
+               },
+               Symbol{
+                       Name:         "__stack_chk_fail",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x6,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBC_2.4",
+                       Library:      "libc.so.6",
+               },
+               Symbol{
+                       Name:         "_ZSt16__ostream_insertIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_PKS3_l",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x7,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBCXX_3.4.9",
+                       Library:      "libstdc++.so.6",
+               },
+               Symbol{
+                       Name:         "_ZNSo5seekpESt4fposI11__mbstate_tE",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x3,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBCXX_3.4",
+                       Library:      "libstdc++.so.6",
+               },
+               Symbol{
+                       Name:         "_ZNSi4readEPcl",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x3,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBCXX_3.4",
+                       Library:      "libstdc++.so.6",
+               },
+               Symbol{
+                       Name:         "_ZNSi5seekgESt4fposI11__mbstate_tE",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x3,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBCXX_3.4",
+                       Library:      "libstdc++.so.6",
+               },
+               Symbol{
+                       Name:         "_ZNSo5writeEPKcl",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x3,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBCXX_3.4",
+                       Library:      "libstdc++.so.6",
+               },
+               Symbol{
+                       Name:         "_ZNSi5seekgElSt12_Ios_Seekdir",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x3,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBCXX_3.4",
+                       Library:      "libstdc++.so.6",
+               },
+               Symbol{
+                       Name:         "_ZSt21ios_base_library_initv",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x8,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBCXX_3.4.32",
+                       Library:      "libstdc++.so.6",
+               },
+               Symbol{
+                       Name:         "TIFFClientOpen",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x9,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "LIBTIFF_4.0",
+                       Library:      "libtiff.so.6",
+               },
+               Symbol{
+                       Name:         "_ZNSt9basic_iosIcSt11char_traitsIcEE5clearESt12_Ios_Iostate",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x3,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBCXX_3.4",
+                       Library:      "libstdc++.so.6",
+               },
+               Symbol{
+                       Name:         "_ZNSi5tellgEv",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x3,
+                       VersionFlags: VerFlagHidden,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "GLIBCXX_3.4",
+                       Library:      "libstdc++.so.6",
+               },
+               Symbol{
+                       Name:         "_ITM_deregisterTMCloneTable",
+                       Info:         0x20,
+                       Other:        0x0,
+                       VersionIndex: 0x1,
+                       VersionFlags: VerFlagGlobal,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+               },
+               Symbol{
+                       Name:         "__gmon_start__",
+                       Info:         0x20,
+                       Other:        0x0,
+                       VersionIndex: 0x1,
+                       VersionFlags: VerFlagGlobal,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+               },
+               Symbol{
+                       Name:         "_ITM_registerTMCloneTable",
+                       Info:         0x20,
+                       Other:        0x0,
+                       VersionIndex: 0x1,
+                       VersionFlags: VerFlagGlobal,
+                       Section:      0x0,
+                       Value:        0x0,
+                       Size:         0x0,
+               },
+               Symbol{
+                       Name:         "LIBTIFFXX_4.0",
+                       Info:         0x11,
+                       Other:        0x0,
+                       VersionIndex: 0x2,
+                       VersionFlags: VerFlagNone,
+                       Section:      0xFFF1,
+                       Value:        0x0,
+                       Size:         0x0,
+                       Version:      "LIBTIFFXX_4.0",
+                       Library:      "",
+               },
+               Symbol{
+                       Name:         "_Z14TIFFStreamOpenPKcPSo",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x2,
+                       VersionFlags: VerFlagNone,
+                       Section:      0xF,
+                       Value:        0x1860,
+                       Size:         0xB8,
+                       Version:      "LIBTIFFXX_4.0",
+                       Library:      "",
+               },
+               Symbol{
+                       Name:         "_Z14TIFFStreamOpenPKcPSi",
+                       Info:         0x12,
+                       Other:        0x0,
+                       VersionIndex: 0x2,
+                       VersionFlags: VerFlagNone,
+                       Section:      0xF,
+                       Value:        0x1920,
+                       Size:         0x13,
+                       Version:      "LIBTIFFXX_4.0",
+                       Library:      "",
+               },
+       },
 }

diff --git a/src/debug/elf/testdata/libtiffxx.so_ b/src/debug/elf/testdata/libtiffxx.so_
new file mode 100644 (file)
index 0000000..4035257
Binary files /dev/null and b/src/debug/elf/testdata/libtiffxx.so_ differ