Add SHF_COMPRESSED section decompression to gold

This patch adds SHF_COMPRESSED section decompression to gold.

	PR gold/18321
	* compressed_output.h (decompress_input_section): Add arguments
	for ELF class, big endian and sh_flags.
	* compressed_output.cc (decompress_input_section): Likewise.
	Support the SHF_COMPRESSED section.
	* dynobj.h (Dynobj): Add elfsize and is_big_endian member
	functions.
	* plugin.h (Pluginobj): Likewise.
	* layout.cc (Layout::get_output_section_flags): Also clear the
	SHF_COMPRESSED bit.
	* object.h (Compressed_section_info): Add flag to store sh_flags.
	(Object): Add pure virtual elfsize and is_big_endian member
	functions.
	* object.cc (need_decompressed_section): Don't skip the ".zdebug"
	prefix here.
	(build_compressed_section_map): Check SHF_COMPRESSED for
	uncompressed size.  Store sh_flags in Compressed_section_info.
	Pass size, big_endian and sh_flags to decompress_input_section.
	Skip the ".debug"/".zdebug" prefix when passing section name to
	need_decompressed_section.
	(Sized_relobj_file<size, big_endian>::do_find_special_section):
	Don't check ".zdebug_*" sections.
	(Object::decompressed_section_contents): Pass ELF class, big
	endian and sh_flags to decompress_input_section.
	* reloc.cc (Sized_relobj_file<size, big_endian>::write_sections):
	Likewise.
	* testsuite/Makefile.am (check_DATA): Add
	debug_msg_cdebug_gabi.err and gdb_index_test_2_gabi.stdout.
	(MOSTLYCLEANFILES): Add debug_msg_cdebug_gabi.err and
	gdb_index_test_2_gabi.stdout.
	(debug_msg_cdebug_gabi.o): New.
	(odr_violation1_cdebug_gabi.o): Likewise.
	(odr_violation2_cdebug_gabi.o): Likewise.
	(debug_msg_cdebug_gabi.err): Likewise.
	(check_SCRIPTS): Add gdb_index_test_2_gabi.sh.
	(gdb_index_test_cdebug_gabi.o): Likewise.
	(gdb_index_test_2_gabi): Likewise.
	(gdb_index_test_2_gabi.stdout): Likewise.
	* testsuite/gdb_index_test_2_gabi.sh: New file.
	* testsuite/Makefile.in: Regenerated.

3 files changed, 79 insertions, 0 deletions

diff --git a/gold/testsuite/Makefile.am b/gold/testsuite/Makefile.am
index 7669f27..9c28c9a 100644
--- a/gold/testsuite/Makefile.am
+++ b/gold/testsuite/Makefile.am
@@ -1239,6 +1239,22 @@ debug_msg_cdebug.err: debug_msg_cdebug.o odr_violation1_cdebug.o odr_violation2_
 	  rm -f $@; \
 	  exit 1; \
 	fi
+check_DATA += debug_msg_cdebug_gabi.err
+MOSTLYCLEANFILES += debug_msg_cdebug_gabi.err
+debug_msg_cdebug_gabi.o: debug_msg.cc gcctestdir/as
+	$(CXXCOMPILE) -Bgcctestdir/ -O0 -g -Wa,--compress-debug-sections=zlib-gabi -c -w -o $@ $(srcdir)/debug_msg.cc
+odr_violation1_cdebug_gabi.o: odr_violation1.cc gcctestdir/as
+	$(CXXCOMPILE) -Bgcctestdir/ -O0 -g -Wa,--compress-debug-sections=zlib-gabi -c -w -o $@ $(srcdir)/odr_violation1.cc
+odr_violation2_cdebug_gabi.o: odr_violation2.cc gcctestdir/as
+	$(CXXCOMPILE) -Bgcctestdir/ -O2 -g -Wa,--compress-debug-sections=zlib-gabi -c -w -o $@ $(srcdir)/odr_violation2.cc
+debug_msg_cdebug_gabi.err: debug_msg_cdebug_gabi.o odr_violation1_cdebug_gabi.o odr_violation2_cdebug_gabi.o gcctestdir/ld
+	@echo $(CXXLINK) -Bgcctestdir/ -Wl,--detect-odr-violations -o debug_msg_cdebug debug_msg_cdebug_gabi.o odr_violation1_cdebug_gabi.o odr_violation2_cdebug_gabi.o "2>$@"
+	@if $(CXXLINK) -Bgcctestdir/ -Wl,--detect-odr-violations -o debug_msg_cdebug_gabi debug_msg_cdebug_gabi.o odr_violation1_cdebug_gabi.o odr_violation2_cdebug_gabi.o 2>$@; \
+	then \
+	  echo 1>&2 "Link of debug_msg_cdebug_gabi should have failed"; \
+	  rm -f $@; \
+	  exit 1; \
+	fi
 
 # See if we can also detect problems when we're linking .so's, not .o's.
 check_DATA += debug_msg_so.err
@@ -2400,6 +2416,15 @@ gdb_index_test_2: gdb_index_test_cdebug.o gcctestdir/ld
 	$(CXXLINK) -Bgcctestdir/ -Wl,--gdb-index $<
 gdb_index_test_2.stdout: gdb_index_test_2
 	$(TEST_READELF) --debug-dump=gdb_index $< > $@
+check_SCRIPTS += gdb_index_test_2_gabi.sh
+check_DATA += gdb_index_test_2_gabi.stdout
+MOSTLYCLEANFILES += gdb_index_test_2.stdout gdb_index_test_2
+gdb_index_test_cdebug_gabi.o: gdb_index_test.cc
+	$(CXXCOMPILE) -Bgcctestdir/ -O0 -g -Wa,--compress-debug-sections=zlib-gabi -c -o $@ $<
+gdb_index_test_2_gabi: gdb_index_test_cdebug_gabi.o gcctestdir/ld
+	$(CXXLINK) -Bgcctestdir/ -Wl,--gdb-index $<
+gdb_index_test_2_gabi.stdout: gdb_index_test_2_gabi
+	$(TEST_READELF) --debug-dump=gdb_index $< > $@
 
 # Another simple C test (DW_AT_high_pc encoding) for --gdb-index.
 check_SCRIPTS += gdb_index_test_3.sh
diff --git a/gold/testsuite/Makefile.in b/gold/testsuite/Makefile.in
index 3f8818d..1131512 100644
--- a/gold/testsuite/Makefile.in
+++ b/gold/testsuite/Makefile.in
@@ -274,6 +274,7 @@ check_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2) $(am__EXEEXT_3) \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	debug_msg.err \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	missing_key_func.err \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	debug_msg_cdebug.err \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	debug_msg_cdebug_gabi.err \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	debug_msg_so.err \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	debug_msg_ndebug.err \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	undef_symbol.err \
@@ -347,6 +348,7 @@ check_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2) $(am__EXEEXT_3) \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@am__append_36 = debug_msg.err \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	missing_key_func.err \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	debug_msg_cdebug.err \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	debug_msg_cdebug_gabi.err \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	debug_msg_so.err \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	debug_msg_ndebug.err \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	undef_symbol.err \
@@ -599,16 +601,20 @@ check_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2) $(am__EXEEXT_3) \
 # Test that --gdb-index functions correctly with gcc-generated pubnames.
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@am__append_65 = gdb_index_test_1.sh \
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_2.sh \
+@GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_2_gabi.sh \
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_3.sh \
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_4.sh
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@am__append_66 = gdb_index_test_1.stdout \
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_2.stdout \
+@GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_2_gabi.stdout \
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_3.stdout \
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_4.stdout
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@am__append_67 = gdb_index_test_1.stdout \
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_1 \
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_2.stdout \
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_2 \
+@GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_2.stdout \
+@GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_2 \
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_3.stdout \
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_3 \
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	gdb_index_test_4.stdout \
@@ -4412,6 +4418,8 @@ gdb_index_test_1.sh.log: gdb_index_test_1.sh
 	@p='gdb_index_test_1.sh'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
 gdb_index_test_2.sh.log: gdb_index_test_2.sh
 	@p='gdb_index_test_2.sh'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
+gdb_index_test_2_gabi.sh.log: gdb_index_test_2_gabi.sh
+	@p='gdb_index_test_2_gabi.sh'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
 gdb_index_test_3.sh.log: gdb_index_test_3.sh
 	@p='gdb_index_test_3.sh'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
 gdb_index_test_4.sh.log: gdb_index_test_4.sh
@@ -5456,6 +5464,20 @@ uninstall-am:
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	  rm -f $@; \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	  exit 1; \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	fi
+@GCC_TRUE@@NATIVE_LINKER_TRUE@debug_msg_cdebug_gabi.o: debug_msg.cc gcctestdir/as
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(CXXCOMPILE) -Bgcctestdir/ -O0 -g -Wa,--compress-debug-sections=zlib-gabi -c -w -o $@ $(srcdir)/debug_msg.cc
+@GCC_TRUE@@NATIVE_LINKER_TRUE@odr_violation1_cdebug_gabi.o: odr_violation1.cc gcctestdir/as
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(CXXCOMPILE) -Bgcctestdir/ -O0 -g -Wa,--compress-debug-sections=zlib-gabi -c -w -o $@ $(srcdir)/odr_violation1.cc
+@GCC_TRUE@@NATIVE_LINKER_TRUE@odr_violation2_cdebug_gabi.o: odr_violation2.cc gcctestdir/as
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(CXXCOMPILE) -Bgcctestdir/ -O2 -g -Wa,--compress-debug-sections=zlib-gabi -c -w -o $@ $(srcdir)/odr_violation2.cc
+@GCC_TRUE@@NATIVE_LINKER_TRUE@debug_msg_cdebug_gabi.err: debug_msg_cdebug_gabi.o odr_violation1_cdebug_gabi.o odr_violation2_cdebug_gabi.o gcctestdir/ld
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	@echo $(CXXLINK) -Bgcctestdir/ -Wl,--detect-odr-violations -o debug_msg_cdebug debug_msg_cdebug_gabi.o odr_violation1_cdebug_gabi.o odr_violation2_cdebug_gabi.o "2>$@"
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	@if $(CXXLINK) -Bgcctestdir/ -Wl,--detect-odr-violations -o debug_msg_cdebug_gabi debug_msg_cdebug_gabi.o odr_violation1_cdebug_gabi.o odr_violation2_cdebug_gabi.o 2>$@; \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	then \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	  echo 1>&2 "Link of debug_msg_cdebug_gabi should have failed"; \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	  rm -f $@; \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	  exit 1; \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	fi
 @GCC_TRUE@@NATIVE_LINKER_TRUE@debug_msg.so: debug_msg.cc gcctestdir/ld
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	$(CXXCOMPILE) -Bgcctestdir/ -O0 -g -shared -fPIC -w -o $@ $(srcdir)/debug_msg.cc
 @GCC_TRUE@@NATIVE_LINKER_TRUE@odr_violation1.so: odr_violation1.cc gcctestdir/ld
@@ -6043,6 +6065,12 @@ uninstall-am:
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	$(CXXLINK) -Bgcctestdir/ -Wl,--gdb-index $<
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@gdb_index_test_2.stdout: gdb_index_test_2
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	$(TEST_READELF) --debug-dump=gdb_index $< > $@
+@GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@gdb_index_test_cdebug_gabi.o: gdb_index_test.cc
+@GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	$(CXXCOMPILE) -Bgcctestdir/ -O0 -g -Wa,--compress-debug-sections=zlib-gabi -c -o $@ $<
+@GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@gdb_index_test_2_gabi: gdb_index_test_cdebug_gabi.o gcctestdir/ld
+@GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	$(CXXLINK) -Bgcctestdir/ -Wl,--gdb-index $<
+@GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@gdb_index_test_2_gabi.stdout: gdb_index_test_2_gabi
+@GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	$(TEST_READELF) --debug-dump=gdb_index $< > $@
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@gdb_index_test_3.o: gdb_index_test_3.c
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@	$(COMPILE) -O0 -g -c -o $@ $<
 @GCC_TRUE@@HAVE_PUBNAMES_TRUE@@NATIVE_LINKER_TRUE@gdb_index_test_3: gdb_index_test_3.o gcctestdir/ld
diff --git a/gold/testsuite/gdb_index_test_2_gabi.sh b/gold/testsuite/gdb_index_test_2_gabi.sh
new file mode 100755
index 0000000..def9bea
--- /dev/null
+++ b/gold/testsuite/gdb_index_test_2_gabi.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+
+# gdb_index_test_2gabi.sh -- a test case for the --gdb-index option.
+
+# Copyright (C) 2015 Free Software Foundation, Inc.
+# Written by Cary Coutant <ccoutant@google.com>.
+# Modified by H.J. Lu <hongjiu.lu@intel.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.
+
+exec ${srcdir}/gdb_index_test_comm.sh gdb_index_test_2_gabi.stdout