gold: Get linkonce/comdate sections for debugging sections

When relocating debug sections, get the section index for the linkonce
section.  Since symbols referenced in debugging sections can be defined
a single comdat section with a different section name, also check the
single comdat section.

	PR gold/26937
	* object.cc (Sized_relobj_file::map_to_kept_section): Get the
	section index for linkonce section.  Also check the single
	comdat section.
	* testsuite/Makefile.am (check_SCRIPTS): Add pr26936.sh.
	(check_DATA): Add pr26936a.stdout and pr26936b.stdout.
	(MOSTLYCLEANFILES): Add pr26936a and pr26936b.
	(pr26936a.stdout): New target.
	(pr26936a): Likewise.
	(pr26936b.stdout): Likewise.
	(pr26936b): Likewise.
	(pr26936a.o): Likewise.
	(pr26936b.o): Likewise.
	(pr26936c.o): Likewise.
	(pr26936d.o): Likewise.
	* testsuite/Makefile.in: Regenerated.
	* testsuite/pr26936.sh: New file.
	* testsuite/pr26936a.s: Likewise.
	* testsuite/pr26936b.s: Likewise.
	* testsuite/pr26936c.s: Likewise.
	* testsuite/pr26936d.s: Likewise.

1 files changed, 55 insertions, 0 deletions

diff --git a/gold/testsuite/pr26936.sh b/gold/testsuite/pr26936.sh
new file mode 100755
index 00000000000..364f50f1a9b
--- /dev/null
+++ b/gold/testsuite/pr26936.sh
@@ -0,0 +1,55 @@
+#!/bin/sh
+
+# pr26936.sh -- Tests for relocations in debug sections against linkonce
+# and comdat sections.
+
+# Copyright (C) 2020 Free Software Foundation, Inc.
+
+# This file is part of gold.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+# MA 02110-1301, USA.
+
+set -e
+
+check()
+{
+    number_of_occurrence=`egrep "$2" ./$1 -o| wc -l`
+    if [ $number_of_occurrence != $3 ]
+    then
+	echo "$1: \"$2\" $3: Failed"
+	status=1
+    fi
+}
+
+status=0
+check pr26936a.stdout "^pr26936a.s +6 +0x10108 +x" 1
+check pr26936a.stdout "^pr26936b.s +5 +0x10109 +x" 1
+check pr26936a.stdout "^pr26936b.s +11 +0x10108 +x" 1
+check pr26936a.stdout "^pr26936c.s +6 +0x10108 +x" 1
+check pr26936a.stdout "^ +0+10108 0+1" 3
+check pr26936a.stdout "^ +0+10109 0+1" 1
+check pr26936a.stdout "^ +0+ 0+10109 0+1010a" 1
+check pr26936a.stdout "^ +0+ 0+10108 0+10109" 1
+check pr26936b.stdout "^pr26936d.s +6 +0x10108 +x" 1
+check pr26936b.stdout "^pr26936b.s +5 +0x10109 +x" 1
+check pr26936b.stdout "^pr26936b.s +11 +0x10108 +x" 1
+check pr26936b.stdout "^pr26936c.s +6 +0x10108 +x" 1
+check pr26936b.stdout "^ +0+10108 0+1" 3
+check pr26936b.stdout "^ +0+10109 0+1" 1
+check pr26936b.stdout "^ +0+ 0+10109 0+1010a" 1
+check pr26936b.stdout "^ +0+ 0+10108 0+10109" 1
+
+exit $status