2011-09-29 Sriraman Tallam <tmsriram@google.com>
* layout.h (section_order_map_): New member. (get_section_order_map): New member function. * output.cc (Output_section::add_input_section): Check for patterns only when --section-ordering-file is specified. * gold.cc (queue_middle_tasks): Delay updating order of sections till output_sections have been formed. * layout.cc (Layout_Layout): Initialize section_order_map_. * plugin.cc (update_section_order): Store order in order_map. Do not update the order. * testsuite/Makefile.am: Add test case for plugin_final_layout. * testsuite/Makefile.in: Regenerate. * testsuite/plugin_section_order.c: New file. * testsuite/plugin_final_layout.cc: New file. * testsuite/plugin_final_layout.sh: New file.
This commit is contained in:
Sriraman Tallam
parent
a7dac15368
commit
f0558624db
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@ -1,3 +1,20 @@
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2011-09-29 Sriraman Tallam <tmsriram@google.com>
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* layout.h (section_order_map_): New member.
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(get_section_order_map): New member function.
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* output.cc (Output_section::add_input_section): Check for patterns
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only when --section-ordering-file is specified.
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* gold.cc (queue_middle_tasks): Delay updating order of sections till
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output_sections have been formed.
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* layout.cc (Layout_Layout): Initialize section_order_map_.
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* plugin.cc (update_section_order): Store order in order_map. Do not
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update the order.
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* testsuite/Makefile.am: Add test case for plugin_final_layout.
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* testsuite/Makefile.in: Regenerate.
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* testsuite/plugin_section_order.c: New file.
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* testsuite/plugin_final_layout.cc: New file.
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* testsuite/plugin_final_layout.sh: New file.
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2011-09-29 Cary Coutant <ccoutant@google.com>
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* gold/incremental.cc (Sized_incremental_binary::do_process_got_plt):
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14
gold/gold.cc
14
gold/gold.cc
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@ -539,6 +539,20 @@ queue_middle_tasks(const General_options& options,
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}
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}
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/* If plugins have specified a section order, re-arrange input sections
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according to a specified section order. If --section-ordering-file is
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also specified, do not do anything here. */
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if (parameters->options().has_plugins()
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&& layout->is_section_ordering_specified()
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&& !parameters->options().section_ordering_file ())
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{
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for (Layout::Section_list::const_iterator p
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= layout->section_list().begin();
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p != layout->section_list().end();
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++p)
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(*p)->update_section_layout(layout->get_section_order_map());
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}
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// Layout deferred objects due to plugins.
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if (parameters->options().has_plugins())
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{
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@ -410,6 +410,7 @@ Layout::Layout(int number_of_input_files, Script_options* script_options)
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script_output_section_data_list_(),
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segment_states_(NULL),
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relaxation_debug_check_(NULL),
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section_order_map_(),
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input_section_position_(),
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input_section_glob_(),
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incremental_base_(NULL),
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@ -522,6 +522,10 @@ class Layout
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const char* name, const elfcpp::Shdr<size, big_endian>& shdr,
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unsigned int reloc_shndx, unsigned int reloc_type, off_t* offset);
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std::map<Section_id, unsigned int>*
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get_section_order_map()
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{ return &this->section_order_map_; }
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bool
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is_section_ordering_specified()
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{ return this->section_ordering_specified_; }
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@ -1322,6 +1326,9 @@ class Layout
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Segment_states* segment_states_;
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// A relaxation debug checker. We only create one when in debugging mode.
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Relaxation_debug_check* relaxation_debug_check_;
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// Plugins specify section_ordering using this map. This is set in
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// update_section_order in plugin.cc
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std::map<Section_id, unsigned int> section_order_map_;
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// Hash a pattern to its position in the section ordering file.
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Unordered_map<std::string, unsigned int> input_section_position_;
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// Vector of glob only patterns in the section_ordering file.
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@ -2476,7 +2476,10 @@ Output_section::add_input_section(Layout* layout,
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|| layout->is_section_ordering_specified())
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{
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Input_section isecn(object, shndx, input_section_size, addralign);
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if (layout->is_section_ordering_specified())
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/* If section ordering is requested by specifying a ordering file,
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using --section-ordering-file, match the section name with
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a pattern. */
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if (parameters->options().section_ordering_file())
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{
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unsigned int section_order_index =
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layout->find_section_order_index(std::string(secname));
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@ -3485,7 +3488,7 @@ Output_section::Input_section_sort_section_order_index_compare::operator()(
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void
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Output_section::update_section_layout(
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const Section_layout_order& order_map)
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const Section_layout_order* order_map)
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{
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for (Input_section_list::iterator p = this->input_sections_.begin();
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p != this->input_sections_.end();
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@ -3499,8 +3502,8 @@ Output_section::update_section_layout(
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: p->relaxed_input_section()->relobj());
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unsigned int shndx = p->shndx();
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Section_layout_order::const_iterator it
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= order_map.find(Section_id(obj, shndx));
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if (it == order_map.end())
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= order_map->find(Section_id(obj, shndx));
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if (it == order_map->end())
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continue;
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unsigned int section_order_index = it->second;
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if (section_order_index != 0)
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@ -2761,7 +2761,7 @@ class Output_section : public Output_data
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typedef std::map<Section_id, unsigned int> Section_layout_order;
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void
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update_section_layout(const Section_layout_order& order_map);
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update_section_layout(const Section_layout_order* order_map);
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// Update the output section flags based on input section flags.
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void
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@ -1630,7 +1630,7 @@ get_input_section_contents(const struct ld_plugin_section section,
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// which they should appear in the final layout.
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static enum ld_plugin_status
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update_section_order(const struct ld_plugin_section *section_list,
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update_section_order(const struct ld_plugin_section* section_list,
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unsigned int num_sections)
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{
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gold_assert(parameters->options().has_plugins());
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@ -1641,8 +1641,14 @@ update_section_order(const struct ld_plugin_section *section_list,
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if (section_list == NULL)
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return LDPS_ERR;
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std::map<Section_id, unsigned int> order_map;
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Layout* layout = parameters->options().plugins()->layout();
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gold_assert (layout != NULL);
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std::map<Section_id, unsigned int>* order_map
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= layout->get_section_order_map();
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/* Store the mapping from Section_id to section position in layout's
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order_map to consult after output sections are added. */
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for (unsigned int i = 0; i < num_sections; ++i)
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{
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Object* obj = parameters->options().plugins()->get_elf_object(
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@ -1651,17 +1657,9 @@ update_section_order(const struct ld_plugin_section *section_list,
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return LDPS_BAD_HANDLE;
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unsigned int shndx = section_list[i].shndx;
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Section_id secn_id(obj, shndx);
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order_map[secn_id] = i + 1;
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(*order_map)[secn_id] = i + 1;
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}
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Layout* layout = parameters->options().plugins()->layout();
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gold_assert (layout != NULL);
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for (Layout::Section_list::const_iterator p = layout->section_list().begin();
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p != layout->section_list().end();
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++p)
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(*p)->update_section_layout(order_map);
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return LDPS_OK;
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}
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@ -1510,6 +1510,20 @@ unused.o: unused.c
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unused.c:
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@cp /dev/null $@
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check_SCRIPTS += plugin_final_layout.sh
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check_DATA += plugin_final_layout.stdout
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plugin_final_layout.o: plugin_final_layout.cc
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$(CXXCOMPILE) -O0 -c -ffunction-sections -fdata-sections -g -o $@ $<
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plugin_final_layout: plugin_final_layout.o plugin_section_order.so gcctestdir/ld
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$(CXXLINK) -Bgcctestdir/ -Wl,--plugin,"./plugin_section_order.so" plugin_final_layout.o
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plugin_final_layout.stdout: plugin_final_layout
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$(TEST_NM) -n plugin_final_layout > plugin_final_layout.stdout
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plugin_section_order.so: plugin_section_order.o
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$(LINK) -Bgcctestdir/ -shared plugin_section_order.o
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plugin_section_order.o: plugin_section_order.c
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$(COMPILE) -O0 -c -fpic -o $@ $<
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endif PLUGINS
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check_PROGRAMS += exclude_libs_test
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@ -306,7 +306,8 @@ check_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2) $(am__EXEEXT_3) \
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ plugin_test_3.sh \
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ plugin_test_4.sh \
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ plugin_test_6.sh \
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ plugin_test_7.sh
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ plugin_test_7.sh \
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ plugin_final_layout.sh
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# Test that symbols known in the IR file but not in the replacement file
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# produce an unresolved symbol error.
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@ -318,7 +319,8 @@ check_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2) $(am__EXEEXT_3) \
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ plugin_test_6.err \
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ plugin_test_7.err \
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ plugin_test_7.syms \
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ plugin_test_9.err
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ plugin_test_9.err \
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ plugin_final_layout.stdout
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# Make a copy of two_file_test_1.o, which does not define the symbol _Z4t16av.
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@am__append_36 = \
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ plugin_test_1.err \
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@ -3644,6 +3646,8 @@ plugin_test_6.sh.log: plugin_test_6.sh
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@p='plugin_test_6.sh'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
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plugin_test_7.sh.log: plugin_test_7.sh
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@p='plugin_test_7.sh'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
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plugin_final_layout.sh.log: plugin_final_layout.sh
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@p='plugin_final_layout.sh'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
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exclude_libs_test.sh.log: exclude_libs_test.sh
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@p='exclude_libs_test.sh'; $(am__check_pre) $(LOG_COMPILE) "$$tst" $(am__check_post)
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discard_locals_test.sh.log: discard_locals_test.sh
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@ -4756,6 +4760,17 @@ uninstall-am:
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ $(COMPILE) -c -o $@ $<
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@unused.c:
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ @cp /dev/null $@
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@plugin_final_layout.o: plugin_final_layout.cc
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ $(CXXCOMPILE) -O0 -c -ffunction-sections -fdata-sections -g -o $@ $<
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@plugin_final_layout: plugin_final_layout.o plugin_section_order.so gcctestdir/ld
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ $(CXXLINK) -Bgcctestdir/ -Wl,--plugin,"./plugin_section_order.so" plugin_final_layout.o
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@plugin_final_layout.stdout: plugin_final_layout
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ $(TEST_NM) -n plugin_final_layout > plugin_final_layout.stdout
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@plugin_section_order.so: plugin_section_order.o
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ $(LINK) -Bgcctestdir/ -shared plugin_section_order.o
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@plugin_section_order.o: plugin_section_order.c
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@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@ $(COMPILE) -O0 -c -fpic -o $@ $<
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@GCC_TRUE@@NATIVE_LINKER_TRUE@exclude_libs_test.syms: exclude_libs_test
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@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(TEST_READELF) -sW $< >$@ 2>/dev/null
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@GCC_TRUE@@NATIVE_LINKER_TRUE@libexclude_libs_test_1.a: exclude_libs_test_1.o
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|
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@ -0,0 +1,41 @@
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// plugin_final_layout.cc -- a test case for gold
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// Copyright 2011 Free Software Foundation, Inc.
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// Written by Sriraman Tallam <tmsriram@google.com>.
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|
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// This file is part of gold.
|
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|
||||
// 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.
|
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|
||||
// The goal of this program is to verify if section ordering
|
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// via plugins happens correctly.
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void bar ()
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{
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}
|
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|
||||
void baz ()
|
||||
{
|
||||
}
|
||||
|
||||
void foo ()
|
||||
{
|
||||
}
|
||||
|
||||
int main ()
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
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@ -0,0 +1,60 @@
|
|||
#!/bin/sh
|
||||
|
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# plugin_final_layout.sh -- test
|
||||
|
||||
# Copyright 2011 Free Software Foundation, Inc.
|
||||
# Written by Sriraman Tallam <tmsriram@google.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.
|
||||
|
||||
# The goal of this program is to verify if --section-ordering-file works as
|
||||
# intended. File final_layout.cc is in this test.
|
||||
|
||||
|
||||
set -e
|
||||
|
||||
check()
|
||||
{
|
||||
awk "
|
||||
BEGIN { saw1 = 0; saw2 = 0; err = 0; }
|
||||
/.*$2\$/ { saw1 = 1; }
|
||||
/.*$3\$/ {
|
||||
saw2 = 1;
|
||||
if (!saw1)
|
||||
{
|
||||
printf \"layout of $2 and $3 is not right\\n\";
|
||||
err = 1;
|
||||
exit 1;
|
||||
}
|
||||
}
|
||||
END {
|
||||
if (!saw1 && !err)
|
||||
{
|
||||
printf \"did not see $2\\n\";
|
||||
exit 1;
|
||||
}
|
||||
if (!saw2 && !err)
|
||||
{
|
||||
printf \"did not see $3\\n\";
|
||||
exit 1;
|
||||
}
|
||||
}" $1
|
||||
}
|
||||
|
||||
check plugin_final_layout.stdout "_Z3foov" "_Z3barv"
|
||||
check plugin_final_layout.stdout "_Z3barv" "_Z3bazv"
|
||||
|
|
@ -0,0 +1,167 @@
|
|||
/* plugin_section_reorder.c -- Simple plugin to reorder function sections
|
||||
|
||||
Copyright 2011 Free Software Foundation, Inc.
|
||||
Written by Sriraman Tallam <tmsriram@google.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. */
|
||||
|
||||
#ifdef HAVE_CONFIG_H
|
||||
#include "config.h"
|
||||
#endif
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <assert.h>
|
||||
#include "plugin-api.h"
|
||||
|
||||
static ld_plugin_get_input_section_count get_input_section_count = NULL;
|
||||
static ld_plugin_get_input_section_type get_input_section_type = NULL;
|
||||
static ld_plugin_get_input_section_name get_input_section_name = NULL;
|
||||
static ld_plugin_get_input_section_contents get_input_section_contents = NULL;
|
||||
static ld_plugin_update_section_order update_section_order = NULL;
|
||||
static ld_plugin_allow_section_ordering allow_section_ordering = NULL;
|
||||
|
||||
enum ld_plugin_status onload(struct ld_plugin_tv *tv);
|
||||
enum ld_plugin_status claim_file_hook(const struct ld_plugin_input_file *file,
|
||||
int *claimed);
|
||||
enum ld_plugin_status all_symbols_read_hook(void);
|
||||
|
||||
/* Plugin entry point. */
|
||||
enum ld_plugin_status
|
||||
onload(struct ld_plugin_tv *tv)
|
||||
{
|
||||
struct ld_plugin_tv *entry;
|
||||
for (entry = tv; entry->tv_tag != LDPT_NULL; ++entry)
|
||||
{
|
||||
switch (entry->tv_tag)
|
||||
{
|
||||
case LDPT_REGISTER_CLAIM_FILE_HOOK:
|
||||
assert((*entry->tv_u.tv_register_claim_file) (claim_file_hook) == LDPS_OK);
|
||||
break;
|
||||
case LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK:
|
||||
assert((*entry->tv_u.tv_register_all_symbols_read) (all_symbols_read_hook)
|
||||
== LDPS_OK);
|
||||
break;
|
||||
case LDPT_GET_INPUT_SECTION_COUNT:
|
||||
get_input_section_count = *entry->tv_u.tv_get_input_section_count;
|
||||
break;
|
||||
case LDPT_GET_INPUT_SECTION_TYPE:
|
||||
get_input_section_type = *entry->tv_u.tv_get_input_section_type;
|
||||
break;
|
||||
case LDPT_GET_INPUT_SECTION_NAME:
|
||||
get_input_section_name = *entry->tv_u.tv_get_input_section_name;
|
||||
break;
|
||||
case LDPT_GET_INPUT_SECTION_CONTENTS:
|
||||
get_input_section_contents = *entry->tv_u.tv_get_input_section_contents;
|
||||
break;
|
||||
case LDPT_UPDATE_SECTION_ORDER:
|
||||
update_section_order = *entry->tv_u.tv_update_section_order;
|
||||
break;
|
||||
case LDPT_ALLOW_SECTION_ORDERING:
|
||||
allow_section_ordering = *entry->tv_u.tv_allow_section_ordering;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (get_input_section_count == NULL
|
||||
|| get_input_section_type == NULL
|
||||
|| get_input_section_name == NULL
|
||||
|| get_input_section_contents == NULL
|
||||
|| update_section_order == NULL
|
||||
|| allow_section_ordering == NULL)
|
||||
{
|
||||
fprintf(stderr, "Some interfaces are missing\n");
|
||||
return LDPS_ERR;
|
||||
}
|
||||
|
||||
return LDPS_OK;
|
||||
}
|
||||
|
||||
inline static int is_prefix_of(const char *prefix, const char *str)
|
||||
{
|
||||
return strncmp(prefix, str, strlen (prefix)) == 0;
|
||||
}
|
||||
|
||||
struct ld_plugin_section section_list[3];
|
||||
int num_entries = 0;
|
||||
|
||||
/* This function is called by the linker for every new object it encounters. */
|
||||
enum ld_plugin_status
|
||||
claim_file_hook(const struct ld_plugin_input_file *file, int *claimed)
|
||||
{
|
||||
static int is_ordering_specified = 0;
|
||||
struct ld_plugin_section section;
|
||||
unsigned int count = 0;
|
||||
unsigned int shndx;
|
||||
|
||||
*claimed = 0;
|
||||
if (is_ordering_specified == 0)
|
||||
{
|
||||
/* Inform the linker to prepare for section reordering. */
|
||||
(*allow_section_ordering)();
|
||||
is_ordering_specified = 1;
|
||||
}
|
||||
|
||||
(*get_input_section_count)(file->handle, &count);
|
||||
|
||||
for (shndx = 0; shndx < count; ++shndx)
|
||||
{
|
||||
char *name = NULL;
|
||||
int position = 3;
|
||||
|
||||
section.handle = file->handle;
|
||||
section.shndx = shndx;
|
||||
(*get_input_section_name)(section, &name);
|
||||
|
||||
/* Order is foo() followed by bar() followed by baz() */
|
||||
if (is_prefix_of(".text.", name))
|
||||
{
|
||||
if (strstr(name, "_Z3foov") != NULL)
|
||||
position = 0;
|
||||
else if (strstr(name, "_Z3barv") != NULL)
|
||||
position = 1;
|
||||
else if (strstr(name, "_Z3bazv") != NULL)
|
||||
position = 2;
|
||||
else
|
||||
position = 3;
|
||||
}
|
||||
if (position < 3)
|
||||
{
|
||||
section_list[position].handle = file->handle;
|
||||
section_list[position].shndx = shndx;
|
||||
num_entries++;
|
||||
}
|
||||
}
|
||||
return LDPS_OK;
|
||||
}
|
||||
|
||||
/* This function is called by the linker after all the symbols have been read.
|
||||
At this stage, it is fine to tell the linker the desired function order. */
|
||||
|
||||
enum ld_plugin_status
|
||||
all_symbols_read_hook(void)
|
||||
{
|
||||
if (num_entries == 3)
|
||||
update_section_order(section_list, num_entries);
|
||||
|
||||
return LDPS_OK;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue