libgo: update to Go1.14beta1

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/214297

1 files changed, 25 insertions, 0 deletions

diff --git a/libgo/go/debug/dwarf/open.go b/libgo/go/debug/dwarf/open.go
index 9381869..d6d4f78 100644
--- a/libgo/go/debug/dwarf/open.go
+++ b/libgo/go/debug/dwarf/open.go
@@ -22,8 +22,14 @@ type Data struct {
 	ranges   []byte
 	str      []byte
 
+	// New sections added in DWARF 5.
+	addr       []byte
+	lineStr    []byte
+	strOffsets []byte
+
 	// parsed data
 	abbrevCache map[uint64]abbrevTable
+	bigEndian   bool
 	order       binary.ByteOrder
 	typeCache   map[Offset]Type
 	typeSigs    map[uint64]*typeUnit
@@ -72,8 +78,10 @@ func New(abbrev, aranges, frame, info, line, pubnames, ranges, str []byte) (*Dat
 	case x == 0 && y == 0:
 		return nil, DecodeError{"info", 4, "unsupported version 0"}
 	case x == 0:
+		d.bigEndian = true
 		d.order = binary.BigEndian
 	case y == 0:
+		d.bigEndian = false
 		d.order = binary.LittleEndian
 	default:
 		return nil, DecodeError{"info", 4, "cannot determine byte order"}
@@ -94,3 +102,20 @@ func New(abbrev, aranges, frame, info, line, pubnames, ranges, str []byte) (*Dat
 func (d *Data) AddTypes(name string, types []byte) error {
 	return d.parseTypes(name, types)
 }
+
+// AddSection adds another DWARF section by name. The name should be a
+// DWARF section name such as ".debug_addr", ".debug_str_offsets", and
+// so forth. This approach is used for new DWARF sections added in
+// DWARF 5 and later.
+func (d *Data) AddSection(name string, contents []byte) error {
+	switch name {
+	case ".debug_addr":
+		d.addr = contents
+	case ".debug_line_str":
+		d.lineStr = contents
+	case ".debug_str_offsets":
+		d.strOffsets = contents
+	}
+	// Just ignore names that we don't yet support.
+	return nil
+}