--- /dev/null
+// main.cc -- gold main function.
+
+// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@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.
+
+#include "gold.h"
+
+#include <cstdio>
+#include <cstring>
+
+#ifdef HAVE_MALLINFO
+#include <malloc.h>
+#endif
+
+#include "libiberty.h"
+
+#include "script.h"
+#include "options.h"
+#include "parameters.h"
+#include "errors.h"
+#include "mapfile.h"
+#include "dirsearch.h"
+#include "workqueue.h"
+#include "object.h"
+#include "archive.h"
+#include "symtab.h"
+#include "layout.h"
+#include "plugin.h"
+#include "gc.h"
+#include "icf.h"
+#include "incremental.h"
+
+using namespace gold;
+
+// This function emits the commandline to a hard-coded file in temp.
+// This is useful for debugging since ld is typically invoked by gcc,
+// so its commandline is not always easy to extract. You should be
+// able to run 'gcc -B... foo.o -o foo' to invoke this linker the
+// first time, and then /tmp/ld-run-foo.sh to invoke it on subsequent
+// runes. "/tmp/ld-run-foo.sh debug" will run the linker inside gdb
+// (or whatever value the environment variable GDB is set to), for
+// even easier debugging. Since this is a debugging-only tool, and
+// creates files, it is only turned on when the user explicitly asks
+// for it, by compiling with -DDEBUG. Do not do this for release
+// versions of the linker!
+
+#ifdef DEBUG
+#include <stdio.h>
+#include <sys/stat.h> // for chmod()
+
+static std::string
+collect_argv(int argc, char** argv)
+{
+ // This is used by write_debug_script(), which wants the unedited argv.
+ std::string args;
+ for (int i = 0; i < argc; ++i)
+ {
+ args.append(" '");
+ // Now append argv[i], but with all single-quotes escaped
+ const char* argpos = argv[i];
+ while (1)
+ {
+ const int len = strcspn(argpos, "'");
+ args.append(argpos, len);
+ if (argpos[len] == '\0')
+ break;
+ args.append("'\"'\"'");
+ argpos += len + 1;
+ }
+ args.append("'");
+ }
+ return args;
+}
+
+static void
+write_debug_script(std::string filename_str,
+ const char* argv_0, const char* args)
+{
+ size_t slash = filename_str.rfind('/');
+ if (slash != std::string::npos)
+ filename_str = filename_str.c_str() + slash + 1;
+ filename_str = std::string("/tmp/ld-run-") + filename_str + ".sh";
+ const char* filename = filename_str.c_str();
+ FILE* fp = fopen(filename, "w");
+ if (fp)
+ {
+ fprintf(fp, "[ \"$1\" = debug ]"
+ " && PREFIX=\"${GDB-gdb} --annotate=3 --fullname %s --args\""
+ " && shift\n",
+ argv_0);
+ fprintf(fp, "$PREFIX%s $*\n", args);
+ fclose(fp);
+ chmod(filename, 0755);
+ }
+ else
+ filename = "[none]";
+ fprintf(stderr, "Welcome to gold! Commandline written to %s.\n", filename);
+ fflush(stderr);
+}
+
+#else // !defined(DEBUG)
+
+static inline std::string
+collect_argv(int, char**)
+{
+ return "";
+}
+
+static inline void
+write_debug_script(std::string, const char*, const char*)
+{
+}
+
+#endif // !defined(DEBUG)
+
+
+int
+main(int argc, char** argv)
+{
+#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
+ setlocale (LC_MESSAGES, "");
+#endif
+#if defined (HAVE_SETLOCALE)
+ setlocale (LC_CTYPE, "");
+#endif
+ bindtextdomain (PACKAGE, LOCALEDIR);
+ textdomain (PACKAGE);
+
+ program_name = argv[0];
+
+ // In libiberty; expands @filename to the args in "filename".
+ expandargv(&argc, &argv);
+
+ // This is used by write_debug_script(), which wants the unedited argv.
+ std::string args = collect_argv(argc, argv);
+
+ Errors errors(program_name);
+
+ // Initialize the global parameters, to let random code get to the
+ // errors object.
+ set_parameters_errors(&errors);
+
+ // Handle the command line options.
+ Command_line command_line;
+ command_line.process(argc - 1, const_cast<const char**>(argv + 1));
+
+ long start_time = 0;
+ if (command_line.options().stats())
+ start_time = get_run_time();
+
+ // Store some options in the globally accessible parameters.
+ set_parameters_options(&command_line.options());
+
+ // Do this as early as possible (since it prints a welcome message).
+ write_debug_script(command_line.options().output_file_name(),
+ program_name, args.c_str());
+
+ // If the user asked for a map file, open it.
+ Mapfile* mapfile = NULL;
+ if (command_line.options().user_set_Map())
+ {
+ mapfile = new Mapfile();
+ if (!mapfile->open(command_line.options().Map()))
+ {
+ delete mapfile;
+ mapfile = NULL;
+ }
+ }
+
+ // The GNU linker ignores version scripts when generating
+ // relocatable output. If we are not compatible, then we break the
+ // Linux kernel build, which uses a linker script with -r which must
+ // not force symbols to be local. It would actually be useful to
+ // permit symbols to be forced local with -r, though, as it would
+ // permit some linker optimizations. Perhaps we need yet another
+ // option to control this. FIXME.
+ if (parameters->options().relocatable())
+ command_line.script_options().version_script_info()->clear();
+
+ // Load plugin libraries.
+ if (command_line.options().has_plugins())
+ command_line.options().plugins()->load_plugins();
+
+ // The work queue.
+ Workqueue workqueue(command_line.options());
+
+ // The list of input objects.
+ Input_objects input_objects;
+
+ // The Garbage Collection (GC, --gc-sections) Object.
+ Garbage_collection gc;
+
+ // The Identical Code Folding (ICF, --icf) Object.
+ Icf icf;
+
+ // The symbol table. We're going to guess here how many symbols
+ // we're going to see based on the number of input files. Even when
+ // this is off, it means at worst we don't quite optimize hashtable
+ // resizing as well as we could have (perhap using more memory).
+ Symbol_table symtab(command_line.number_of_input_files() * 1024,
+ command_line.version_script());
+
+ if (parameters->options().gc_sections())
+ symtab.set_gc(&gc);
+
+ if (parameters->options().icf_enabled())
+ symtab.set_icf(&icf);
+
+ // The layout object.
+ Layout layout(command_line.number_of_input_files(),
+ &command_line.script_options());
+
+ if (layout.incremental_inputs() != NULL)
+ {
+ layout.incremental_inputs()->report_command_line(argc, argv);
+ layout.incremental_inputs()->report_inputs(command_line.inputs());
+ }
+
+ // Get the search path from the -L options.
+ Dirsearch search_path;
+ search_path.initialize(&workqueue, &command_line.options().library_path());
+
+ // Queue up the first set of tasks.
+ queue_initial_tasks(command_line.options(), search_path,
+ command_line, &workqueue, &input_objects,
+ &symtab, &layout, mapfile);
+
+ // Run the main task processing loop.
+ workqueue.process(0);
+
+ if (command_line.options().stats())
+ {
+ long run_time = get_run_time() - start_time;
+ fprintf(stderr, _("%s: total run time: %ld.%06ld seconds\n"),
+ program_name, run_time / 1000000, run_time % 1000000);
+#ifdef HAVE_MALLINFO
+ struct mallinfo m = mallinfo();
+ fprintf(stderr, _("%s: total space allocated by malloc: %d bytes\n"),
+ program_name, m.arena);
+#endif
+ File_read::print_stats();
+ Archive::print_stats();
+ fprintf(stderr, _("%s: output file size: %lld bytes\n"),
+ program_name, static_cast<long long>(layout.output_file_size()));
+ symtab.print_stats();
+ layout.print_stats();
+ }
+
+ if (mapfile != NULL)
+ mapfile->close();
+
+ // Issue defined symbol report.
+ if (command_line.options().user_set_print_symbol_counts())
+ input_objects.print_symbol_counts(&symtab);
+
+ if (parameters->options().fatal_warnings()
+ && errors.warning_count() > 0
+ && errors.error_count() == 0)
+ gold_error("treating warnings as errors");
+
+ // If the user used --noinhibit-exec, we force the exit status to be
+ // successful. This is compatible with GNU ld.
+ gold_exit(errors.error_count() == 0
+ || parameters->options().noinhibit_exec());
+}
projects / msp430-binutils.git / blobdiff