// gold.cc -- main linker functions
-// Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2012
-// Free Software Foundation, Inc.
+// Copyright (C) 2006-2020 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
Workqueue* workqueue, Input_objects* input_objects,
Symbol_table* symtab, Layout* layout, Mapfile* mapfile)
{
- if (cmdline.begin() == cmdline.end())
+ if (cmdline.number_of_input_files() == 0)
{
bool is_ok = false;
if (options.printed_version())
if (timer != NULL)
timer->stamp(0);
+ // We have to support the case of not seeing any input objects, and
+ // generate an empty file. Existing builds depend on being able to
+ // pass an empty archive to the linker and get an empty object file
+ // out. In order to do this we need to use a default target.
+ if (input_objects->number_of_input_objects() == 0
+ && layout->incremental_base() == NULL)
+ parameters_force_valid_target();
+
// Add any symbols named with -u options to the symbol table.
symtab->add_undefined_symbols_from_command_line(layout);
if (parameters->options().gc_sections())
{
// Find the start symbol if any.
- Symbol* start_sym = symtab->lookup(parameters->entry());
- if (start_sym != NULL)
- {
- bool is_ordinary;
- unsigned int shndx = start_sym->shndx(&is_ordinary);
- if (is_ordinary)
- {
- symtab->gc()->worklist().push(
- Section_id(start_sym->object(), shndx));
- }
- }
+ Symbol* sym = symtab->lookup(parameters->entry());
+ if (sym != NULL)
+ symtab->gc_mark_symbol(sym);
+ sym = symtab->lookup(parameters->options().init());
+ if (sym != NULL && sym->is_defined() && !sym->is_from_dynobj())
+ symtab->gc_mark_symbol(sym);
+ sym = symtab->lookup(parameters->options().fini());
+ if (sym != NULL && sym->is_defined() && !sym->is_from_dynobj())
+ symtab->gc_mark_symbol(sym);
// Symbols named with -u should not be considered garbage.
symtab->gc_mark_undef_symbols(layout);
gold_assert(symtab->gc() != NULL);
// Call Object::layout for the second time to determine the
// output_sections for all referenced input sections. When
- // --gc-sections or --icf is turned on, Object::layout is
- // called twice. It is called the first time when the
- // symbols are added.
+ // --gc-sections or --icf is turned on, or when certain input
+ // sections have to be mapped to unique segments, Object::layout
+ // is called twice. It is called the first time when symbols
+ // are added.
if (parameters->options().gc_sections()
- || parameters->options().icf_enabled())
+ || parameters->options().icf_enabled()
+ || layout->is_unique_segment_for_sections_specified())
{
for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
p != input_objects->relobj_end();
}
}
+ // Layout deferred objects due to plugins.
+ if (parameters->options().has_plugins())
+ {
+ Plugin_manager* plugins = parameters->options().plugins();
+ gold_assert(plugins != NULL);
+ plugins->layout_deferred_objects();
+ }
+
+ // Finalize the .eh_frame section.
+ layout->finalize_eh_frame_section();
+
/* If plugins have specified a section order, re-arrange input sections
according to a specified section order. If --section-ordering-file is
also specified, do not do anything here. */
(*p)->update_section_layout(layout->get_section_order_map());
}
- // Layout deferred objects due to plugins.
- if (parameters->options().has_plugins())
- {
- Plugin_manager* plugins = parameters->options().plugins();
- gold_assert(plugins != NULL);
- plugins->layout_deferred_objects();
- }
-
if (parameters->options().gc_sections()
|| parameters->options().icf_enabled())
{
}
}
- // We have to support the case of not seeing any input objects, and
- // generate an empty file. Existing builds depend on being able to
- // pass an empty archive to the linker and get an empty object file
- // out. In order to do this we need to use a default target.
- if (input_objects->number_of_input_objects() == 0
- && layout->incremental_base() == NULL)
- parameters_force_valid_target();
-
int thread_count = options.thread_count_middle();
if (thread_count == 0)
thread_count = std::max(2, input_objects->number_of_input_objects());
for (++p; p != input_objects->relobj_end(); ++p)
{
if ((*p)->uses_split_stack() != uses_split_stack)
- gold_fatal(_("cannot mix split-stack '%s' and "
- "non-split-stack '%s' when using -r"),
- (*input_objects->relobj_begin())->name().c_str(),
- (*p)->name().c_str());
+ {
+ const char *name1
+ = (*input_objects->relobj_begin())->name().c_str();
+ const char *name2 = (*p)->name().c_str();
+ const char *name_split = uses_split_stack ? name1 : name2;
+ const char *name_nosplit = uses_split_stack ? name2 : name1;
+ gold_fatal(_("cannot mix split-stack '%s' and "
+ "non-split-stack '%s' when using -r"),
+ name_split, name_nosplit);
+ }
}
}
}
// dynamic objects that it depends upon.
input_objects->check_dynamic_dependencies();
- // See if any of the input definitions violate the One Definition Rule.
- // TODO: if this is too slow, do this as a task, rather than inline.
- symtab->detect_odr_violations(task, options.output_file_name());
-
// Do the --no-undefined-version check.
if (!parameters->options().undefined_version())
{
if (!any_postprocessing_sections)
{
input_sections_blocker = new Task_token(true);
+ // Write_symbols_task, Relocate_tasks.
+ input_sections_blocker->add_blocker();
input_sections_blocker->add_blockers(input_objects->number_of_relobjs());
}
// Queue a task to write out the output sections.
workqueue->queue(new Write_sections_task(layout, of, output_sections_blocker,
+ input_sections_blocker,
final_blocker));
// Queue a task to write out everything else.
final_blocker = new_final_blocker;
}
- // Queue a task to close the output file. This will be blocked by
- // FINAL_BLOCKER.
- workqueue->queue(new Task_function(new Close_task_runner(&options, layout,
- of),
- final_blocker,
- "Task_function Close_task_runner"));
+ // Create tasks for tree-style build ID computation, if necessary.
+ if (strcmp(options.build_id(), "tree") == 0)
+ {
+ // Queue a task to compute the build id. This will be blocked by
+ // FINAL_BLOCKER, and will in turn schedule the task to close
+ // the output file.
+ workqueue->queue(new Task_function(new Build_id_task_runner(&options,
+ layout,
+ of),
+ final_blocker,
+ "Task_function Build_id_task_runner"));
+ }
+ else
+ {
+ // Queue a task to close the output file. This will be blocked by
+ // FINAL_BLOCKER.
+ workqueue->queue(new Task_function(new Close_task_runner(&options, layout,
+ of, NULL, 0),
+ final_blocker,
+ "Task_function Close_task_runner"));
+ }
+
}
} // End namespace gold.
projects / deliverable / binutils-gdb.git / blobdiff