xtool/nm:version

xtool/nm/nm.go

@@ -62,12 +62,26 @@ const (
  LocalASym = SymbolType('s') // Local symbol in an assembler source file
 )
 
+// VersionType represents the version type of a symbol.
+// This is specific to Linux systems.
+// On macOS , this will always be VersionNone.
+// https://sourceware.org/binutils/docs/binutils/nm.html
+type VersionType int
+
+const (
+ VersionNone VersionType = iota // No version information
+ VersionSpecific // Specific version (@)
+ VersionDefault // Default version (@@)
+)
+
 // Symbol represents a symbol in an object file.
 type Symbol struct {
- Name string // symbol name
- Addr uint64 // symbol address
- Type SymbolType // symbol type
- FAddr bool // address is valid
+ Name string // symbol name
+ Addr uint64 // symbol address
+ Type SymbolType // symbol type
+ FAddr bool // address is valid
+ VersionType VersionType // version type of the symbol
+ Version string // version information of the symbol
 }
 
 // ObjectFile represents an object file.
@@ -143,28 +157,48 @@ func listOutput(data []byte) (items []*ObjectFile, err error) {
  return
  }
  var sym *Symbol
+ var fullSymName string
  if is64bits(line) {
+ fullSymName = string(line[19:])
  sym = &Symbol{
- Name: string(line[19:]),
  Type: SymbolType(line[17]),
  }
  if sym.FAddr = hasAddr(line); sym.FAddr {
  sym.Addr = hexUint64(line)
  }
  } else {
+ fullSymName = string(line[11:])
  sym = &Symbol{
- Name: string(line[11:]),
  Type: SymbolType(line[9]),
  }
  if sym.FAddr = hasAddr(line); sym.FAddr {
  sym.Addr = uint64(hexUint32(line))
  }
  }
+
+ sym.Name, sym.VersionType, sym.Version = parseSymName(fullSymName)
  item.Symbols = append(item.Symbols, sym)
  }
  return
 }
 
+func parseSymName(symName string) (name string, versionType VersionType, version string) {
+ if idx := strings.LastIndex(symName, "@"); idx != -1 {
+ name = symName[:idx]
+ version = symName[idx+1:]
+ if idx > 0 && symName[idx-1] == '@' {
+ versionType = VersionDefault
+ name = symName[:idx-1]
+ } else {
+ versionType = VersionSpecific
+ }
+ } else {
+ name = symName
+ versionType = VersionNone
+ }
+ return
+}
+
 func hasAddr(line []byte) bool {
  c := line[0]
  return c != ' ' && c != '-'