When using linker scripts, place linker-generated sections by the output section name.

2016-12-12  Igor Kudrin  <ikudrin@accesssoftek.com>
	    Cary Coutant  <ccoutant@gmail.com>

gold/
	PR gold/14676
	* script-sections.cc (Output_section_definition::output_section_name):
	For linker-generated sections, compare with output section name.
	* testsuite/Makefile.am (script_test_13): New test.
	* testsuite/Makefile.in: Regenerate.
	* testsuite/script_test_13.c: New source file.
	* testsuite/script_test_13.sh: New script.
	* testsuite/script_test_13.t: New linker script.


diff --git a/gold/script-sections.cc b/gold/script-sections.cc
index d970e57..90ec8d4 100644
--- a/gold/script-sections.cc
+++ b/gold/script-sections.cc
@@ -2291,6 +2291,17 @@ Output_section_definition::output_section_name(
     Script_sections::Section_type* psection_type,
     bool* keep)
 {
+  // If the input section is linker-created, just look for a match
+  // on the output section name.
+  if (file_name == NULL && this->name_ != "/DISCARD/")
+    {
+      if (this->name_ != section_name)
+	return NULL;
+      *slot = &this->output_section_;
+      *psection_type = this->section_type();
+      return this->name_.c_str();
+    }
+
   // Ask each element whether it matches NAME.
   for (Output_section_elements::const_iterator p = this->elements_.begin();
        p != this->elements_.end();
diff --git a/gold/testsuite/Makefile.am b/gold/testsuite/Makefile.am
index 25db2b8..4d0aaa1 100644
--- a/gold/testsuite/Makefile.am
+++ b/gold/testsuite/Makefile.am
@@ -2008,6 +2008,17 @@ script_test_12a.o: script_test_12a.c
 script_test_12b.o: script_test_12b.c
 	$(COMPILE) -O0 -c -o $@ $<
 
+# Test for ordering internally created sections with a linker script.
+check_SCRIPTS += script_test_13.sh
+check_DATA += script_test_13.stdout
+MOSTLYCLEANFILES += script_test_13
+script_test_13.o: script_test_13.c
+	$(COMPILE) -O0 -c -fPIC -o $@ $<
+script_test_13: $(srcdir)/script_test_13.t script_test_13.o gcctestdir/ld
+	gcctestdir/ld -shared -o $@ script_test_13.o -T $(srcdir)/script_test_13.t
+script_test_13.stdout: script_test_13
+	$(TEST_READELF) -SW script_test_13 > $@
+
 # Test for SORT_BY_INIT_PRIORITY.
 check_SCRIPTS += script_test_14.sh
 check_DATA += script_test_14.stdout
diff --git a/gold/testsuite/script_test_13.c b/gold/testsuite/script_test_13.c
new file mode 100644
index 0000000..83e0948
--- /dev/null
+++ b/gold/testsuite/script_test_13.c
@@ -0,0 +1,2 @@
+extern int a;
+int* pa = &a;
diff --git a/gold/testsuite/script_test_13.sh b/gold/testsuite/script_test_13.sh
new file mode 100755
index 0000000..fff2772
--- /dev/null
+++ b/gold/testsuite/script_test_13.sh
@@ -0,0 +1,41 @@
+#!/bin/sh
+
+# script_test_13.sh -- test that internally created sections obey
+# the order from the linker script.
+
+# Copyright (C) 2016 Free Software Foundation, Inc.
+# Written by Igor Kudrin <ikudrin@accesssoftek.com>.
+
+# 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.
+
+check()
+{
+    file=$1
+    pattern=$2
+    match_pattern=`grep -e "$pattern" $file`
+    if test -z "$match_pattern"; then
+        echo "Expected pattern was not found:"
+        echo "    $pattern"
+        echo ""
+        echo "Actual output below:"
+        cat "$file"
+        exit 1
+    fi
+}
+
+check "script_test_13.stdout" "\\.rela\\.dyn[[:space:]]\\+RELA[[:space:]]\\+0\\+10000\\b"
diff --git a/gold/testsuite/script_test_13.t b/gold/testsuite/script_test_13.t
new file mode 100644
index 0000000..d51e1db
--- /dev/null
+++ b/gold/testsuite/script_test_13.t
@@ -0,0 +1,7 @@
+SECTIONS
+{
+	.text 0 : { *(.text) }
+
+	.rela.dyn 0x10000 : { *(.rela.init) }
+	.rel.dyn 0x10000 : { *(.rela.init) }
+}