// main.cc -- gold main function.
-// Copyright 2006, 2007 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
// This file is part of gold.
#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"
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)
{
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.
- initialize_parameters(&errors);
+ set_parameters_errors(&errors);
// Handle the command line options.
Command_line command_line;
- command_line.process(argc - 1, argv + 1);
+ command_line.process(argc - 1, const_cast<const char**>(argv + 1));
long start_time = 0;
- if (command_line.options().print_stats())
+ if (command_line.options().stats())
start_time = get_run_time();
// Store some options in the globally accessible parameters.
- set_parameters_from_options(&command_line.options());
+ 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();
// The work queue.
Workqueue workqueue(command_line.options());
// 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 worse we don't quite optimize hashtable
+ // 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);
+ Symbol_table symtab(command_line.number_of_input_files() * 1024,
+ command_line.version_script());
// The layout object.
- Layout layout(command_line.options());
+ Layout layout(command_line.options(), &command_line.script_options());
// Get the search path from the -L options.
Dirsearch search_path;
- search_path.initialize(&workqueue, &command_line.options().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);
+ &symtab, &layout, mapfile);
// Run the main task processing loop.
- workqueue.process();
+ workqueue.process(0);
- if (command_line.options().print_stats())
+ if (command_line.options().stats())
{
long run_time = get_run_time() - start_time;
fprintf(stderr, _("%s: total run time: %ld.%06ld seconds\n"),
layout.print_stats();
}
- gold_exit(errors.error_count() == 0);
+ if (mapfile != NULL)
+ mapfile->close();
+
+ 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 / binutils.git / blobdiff