Native Image SBOM: support extracting symbols in .dynsym section for …

…ELF files

Signed-off-by: Joel Rudsberg <[email protected]>

syft/pkg/cataloger/java/graalvm_native_image_cataloger.go

@@ -251,11 +251,11 @@ func (ni nativeImageElf) fetchPkgs() (pkgs []pkg.Package, relationships []artifa
 	var sbomLength elf.Symbol
 	var svmVersion elf.Symbol
 
-	si, err := bi.Symbols()
+	si, err := ni.getSymbols()
 	if err != nil {
-		return nil, nil, fmt.Errorf("no symbols found in binary: %w", err)
+		return nil, nil, err
 	}
-	if si == nil {
+	if len(si) == 0 {
 		return nil, nil, errors.New(nativeImageMissingSymbolsError)
 	}
 	for _, s := range si {
@@ -286,6 +286,31 @@ func (ni nativeImageElf) fetchPkgs() (pkgs []pkg.Package, relationships []artifa
 	return decompressSbom(data, sbomLocation, lengthLocation)
 }
 
+// getSymbols obtains the union of the symbols in the .symtab and .dynsym sections of the ELF file
+func (ni nativeImageElf) getSymbols() ([]elf.Symbol, error) {
+	var symbols []elf.Symbol
+	symsErr := error(nil)
+	dynErr := error(nil)
+
+	if syms, err := ni.file.Symbols(); err == nil {
+		symbols = append(symbols, syms...)
+	} else {
+		symsErr = err
+	}
+
+	if dynSyms, err := ni.file.DynamicSymbols(); err == nil {
+		symbols = append(symbols, dynSyms...)
+	} else {
+		dynErr = err
+	}
+
+	if symsErr != nil && dynErr != nil {
+		return nil, fmt.Errorf("could not retrieve symbols from binary: SHT_SYMTAB error: %v, SHT_DYNSYM error: %v", symsErr, dynErr)
+	}
+
+	return symbols, nil
+}
+
 // fetchPkgs obtains the packages from a Native Image given as a Mach O file.
 func (ni nativeImageMachO) fetchPkgs() (pkgs []pkg.Package, relationships []artifact.Relationship, retErr error) {
 	defer func() {