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https://sourceware.org/git/binutils-gdb.git
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1508 lines
41 KiB
C++
1508 lines
41 KiB
C++
// options.c -- handle command line options for gold
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// Copyright (C) 2006-2014 Free Software Foundation, Inc.
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// Written by Ian Lance Taylor <iant@google.com>.
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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
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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// MA 02110-1301, USA.
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#include "gold.h"
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#include <cerrno>
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#include <cstdlib>
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#include <cstring>
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#include <fstream>
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#include <vector>
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#include <iostream>
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#include <sys/stat.h>
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#include "filenames.h"
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#include "libiberty.h"
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#include "demangle.h"
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#include "../bfd/bfdver.h"
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#include "debug.h"
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#include "script.h"
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#include "target-select.h"
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#include "options.h"
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#include "plugin.h"
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namespace gold
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{
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General_options
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Position_dependent_options::default_options_;
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namespace options
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{
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// This flag is TRUE if we should register the command-line options as they
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// are constructed. It is set after construction of the options within
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// class Position_dependent_options.
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static bool ready_to_register = false;
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// This global variable is set up as General_options is constructed.
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static std::vector<const One_option*> registered_options;
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// These are set up at the same time -- the variables that accept one
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// dash, two, or require -z. A single variable may be in more than
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// one of these data structures.
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typedef Unordered_map<std::string, One_option*> Option_map;
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static Option_map* long_options = NULL;
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static One_option* short_options[128];
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void
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One_option::register_option()
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{
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if (!ready_to_register)
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return;
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registered_options.push_back(this);
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// We can't make long_options a static Option_map because we can't
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// guarantee that will be initialized before register_option() is
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// first called.
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if (long_options == NULL)
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long_options = new Option_map;
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// TWO_DASHES means that two dashes are preferred, but one is ok too.
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if (!this->longname.empty())
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(*long_options)[this->longname] = this;
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const int shortname_as_int = static_cast<int>(this->shortname);
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gold_assert(shortname_as_int >= 0 && shortname_as_int < 128);
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if (this->shortname != '\0')
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{
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gold_assert(short_options[shortname_as_int] == NULL);
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short_options[shortname_as_int] = this;
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}
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}
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void
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One_option::print() const
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{
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bool comma = false;
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printf(" ");
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int len = 2;
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if (this->shortname != '\0')
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{
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len += printf("-%c", this->shortname);
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if (this->helparg)
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{
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// -z takes long-names only.
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gold_assert(this->dashes != DASH_Z);
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len += printf(" %s", gettext(this->helparg));
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}
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comma = true;
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}
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if (!this->longname.empty()
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&& !(this->longname[0] == this->shortname
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&& this->longname[1] == '\0'))
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{
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if (comma)
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len += printf(", ");
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switch (this->dashes)
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{
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case options::ONE_DASH: case options::EXACTLY_ONE_DASH:
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len += printf("-");
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break;
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case options::TWO_DASHES: case options::EXACTLY_TWO_DASHES:
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len += printf("--");
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break;
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case options::DASH_Z:
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len += printf("-z ");
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break;
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default:
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gold_unreachable();
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}
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len += printf("%s", this->longname.c_str());
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if (this->helparg)
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{
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// For most options, we print "--frob FOO". But for -z
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// we print "-z frob=FOO".
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len += printf("%c%s", this->dashes == options::DASH_Z ? '=' : ' ',
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gettext(this->helparg));
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}
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}
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if (len >= 30)
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{
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printf("\n");
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len = 0;
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}
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for (; len < 30; ++len)
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std::putchar(' ');
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// TODO: if we're boolean, add " (default)" when appropriate.
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printf("%s\n", gettext(this->helpstring));
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}
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void
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help()
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{
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printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name);
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std::vector<const One_option*>::const_iterator it;
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for (it = registered_options.begin(); it != registered_options.end(); ++it)
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(*it)->print();
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// config.guess and libtool.m4 look in ld --help output for the
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// string "supported targets".
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printf(_("%s: supported targets:"), gold::program_name);
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std::vector<const char*> supported_names;
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gold::supported_target_names(&supported_names);
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for (std::vector<const char*>::const_iterator p = supported_names.begin();
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p != supported_names.end();
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++p)
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printf(" %s", *p);
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printf("\n");
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printf(_("%s: supported emulations:"), gold::program_name);
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supported_names.clear();
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gold::supported_emulation_names(&supported_names);
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for (std::vector<const char*>::const_iterator p = supported_names.begin();
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p != supported_names.end();
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++p)
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printf(" %s", *p);
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printf("\n");
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// REPORT_BUGS_TO is defined in bfd/bfdver.h.
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const char* report = REPORT_BUGS_TO;
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if (*report != '\0')
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printf(_("Report bugs to %s\n"), report);
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}
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// For bool, arg will be NULL (boolean options take no argument);
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// we always just set to true.
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void
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parse_bool(const char*, const char*, bool* retval)
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{
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*retval = true;
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}
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void
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parse_uint(const char* option_name, const char* arg, int* retval)
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{
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char* endptr;
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*retval = strtol(arg, &endptr, 0);
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if (*endptr != '\0' || *retval < 0)
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gold_fatal(_("%s: invalid option value (expected an integer): %s"),
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option_name, arg);
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}
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void
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parse_int(const char* option_name, const char* arg, int* retval)
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{
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char* endptr;
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*retval = strtol(arg, &endptr, 0);
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if (*endptr != '\0')
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gold_fatal(_("%s: invalid option value (expected an integer): %s"),
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option_name, arg);
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}
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void
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parse_uint64(const char* option_name, const char* arg, uint64_t* retval)
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{
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char* endptr;
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*retval = strtoull(arg, &endptr, 0);
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if (*endptr != '\0')
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gold_fatal(_("%s: invalid option value (expected an integer): %s"),
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option_name, arg);
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}
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void
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parse_double(const char* option_name, const char* arg, double* retval)
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{
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char* endptr;
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*retval = strtod(arg, &endptr);
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if (*endptr != '\0')
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gold_fatal(_("%s: invalid option value "
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"(expected a floating point number): %s"),
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option_name, arg);
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}
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void
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parse_percent(const char* option_name, const char* arg, double* retval)
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{
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char* endptr;
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*retval = strtod(arg, &endptr) / 100.0;
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if (*endptr != '\0')
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gold_fatal(_("%s: invalid option value "
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"(expected a floating point number): %s"),
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option_name, arg);
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}
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void
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parse_string(const char* option_name, const char* arg, const char** retval)
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{
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if (*arg == '\0')
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gold_fatal(_("%s: must take a non-empty argument"), option_name);
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*retval = arg;
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}
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void
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parse_optional_string(const char*, const char* arg, const char** retval)
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{
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*retval = arg;
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}
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void
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parse_dirlist(const char*, const char* arg, Dir_list* retval)
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{
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retval->push_back(Search_directory(arg, false));
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}
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void
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parse_set(const char*, const char* arg, String_set* retval)
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{
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retval->insert(std::string(arg));
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}
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void
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parse_choices(const char* option_name, const char* arg, const char** retval,
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const char* choices[], int num_choices)
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{
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for (int i = 0; i < num_choices; i++)
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if (strcmp(choices[i], arg) == 0)
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{
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*retval = arg;
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return;
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}
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// If we get here, the user did not enter a valid choice, so we die.
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std::string choices_list;
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for (int i = 0; i < num_choices; i++)
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{
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choices_list += choices[i];
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if (i != num_choices - 1)
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choices_list += ", ";
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}
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gold_fatal(_("%s: must take one of the following arguments: %s"),
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option_name, choices_list.c_str());
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}
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} // End namespace options.
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// Define the handler for "special" options (set via DEFINE_special).
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void
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General_options::parse_help(const char*, const char*, Command_line*)
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{
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options::help();
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::exit(EXIT_SUCCESS);
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}
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void
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General_options::parse_version(const char* opt, const char*, Command_line*)
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{
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bool print_short = (opt[0] == '-' && opt[1] == 'v');
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gold::print_version(print_short);
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this->printed_version_ = true;
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if (!print_short)
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::exit(EXIT_SUCCESS);
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}
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void
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General_options::parse_V(const char*, const char*, Command_line*)
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{
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gold::print_version(true);
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this->printed_version_ = true;
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printf(_(" Supported targets:\n"));
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std::vector<const char*> supported_names;
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gold::supported_target_names(&supported_names);
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for (std::vector<const char*>::const_iterator p = supported_names.begin();
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p != supported_names.end();
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++p)
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printf(" %s\n", *p);
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printf(_(" Supported emulations:\n"));
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supported_names.clear();
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gold::supported_emulation_names(&supported_names);
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for (std::vector<const char*>::const_iterator p = supported_names.begin();
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p != supported_names.end();
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++p)
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printf(" %s\n", *p);
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}
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void
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General_options::parse_defsym(const char*, const char* arg,
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Command_line* cmdline)
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{
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cmdline->script_options().define_symbol(arg);
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}
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void
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General_options::parse_incremental(const char*, const char*,
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Command_line*)
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{
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this->incremental_mode_ = INCREMENTAL_AUTO;
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}
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void
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General_options::parse_no_incremental(const char*, const char*,
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Command_line*)
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{
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this->incremental_mode_ = INCREMENTAL_OFF;
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}
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void
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General_options::parse_incremental_full(const char*, const char*,
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Command_line*)
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{
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this->incremental_mode_ = INCREMENTAL_FULL;
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}
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void
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General_options::parse_incremental_update(const char*, const char*,
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Command_line*)
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{
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this->incremental_mode_ = INCREMENTAL_UPDATE;
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}
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void
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General_options::parse_incremental_changed(const char*, const char*,
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Command_line*)
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{
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this->implicit_incremental_ = true;
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this->incremental_disposition_ = INCREMENTAL_CHANGED;
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}
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void
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General_options::parse_incremental_unchanged(const char*, const char*,
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Command_line*)
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{
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this->implicit_incremental_ = true;
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this->incremental_disposition_ = INCREMENTAL_UNCHANGED;
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}
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void
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General_options::parse_incremental_unknown(const char*, const char*,
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Command_line*)
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{
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this->implicit_incremental_ = true;
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this->incremental_disposition_ = INCREMENTAL_CHECK;
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}
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void
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General_options::parse_incremental_startup_unchanged(const char*, const char*,
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Command_line*)
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{
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this->implicit_incremental_ = true;
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this->incremental_startup_disposition_ = INCREMENTAL_UNCHANGED;
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}
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void
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General_options::parse_library(const char*, const char* arg,
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Command_line* cmdline)
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{
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Input_file_argument::Input_file_type type;
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const char* name;
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if (arg[0] == ':')
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{
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type = Input_file_argument::INPUT_FILE_TYPE_SEARCHED_FILE;
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name = arg + 1;
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}
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else
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{
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type = Input_file_argument::INPUT_FILE_TYPE_LIBRARY;
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name = arg;
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}
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Input_file_argument file(name, type, "", false, *this);
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cmdline->inputs().add_file(file);
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}
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#ifdef ENABLE_PLUGINS
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void
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General_options::parse_plugin(const char*, const char* arg,
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Command_line*)
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{
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this->add_plugin(arg);
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}
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// Parse --plugin-opt.
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void
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General_options::parse_plugin_opt(const char*, const char* arg,
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Command_line*)
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{
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this->add_plugin_option(arg);
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}
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#endif // ENABLE_PLUGINS
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void
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General_options::parse_R(const char* option, const char* arg,
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Command_line* cmdline)
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{
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struct stat s;
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if (::stat(arg, &s) != 0 || S_ISDIR(s.st_mode))
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this->add_to_rpath(arg);
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else
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this->parse_just_symbols(option, arg, cmdline);
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}
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void
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General_options::parse_just_symbols(const char*, const char* arg,
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Command_line* cmdline)
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{
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Input_file_argument file(arg, Input_file_argument::INPUT_FILE_TYPE_FILE,
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"", true, *this);
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cmdline->inputs().add_file(file);
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}
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// Handle --section-start.
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void
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General_options::parse_section_start(const char*, const char* arg,
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Command_line*)
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{
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const char* eq = strchr(arg, '=');
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if (eq == NULL)
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{
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gold_error(_("invalid argument to --section-start; "
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"must be SECTION=ADDRESS"));
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return;
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}
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std::string section_name(arg, eq - arg);
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++eq;
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const char* val_start = eq;
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if (eq[0] == '0' && (eq[1] == 'x' || eq[1] == 'X'))
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eq += 2;
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if (*eq == '\0')
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{
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gold_error(_("--section-start address missing"));
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return;
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}
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uint64_t addr = 0;
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hex_init();
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for (; *eq != '\0'; ++eq)
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{
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if (!hex_p(*eq))
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{
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gold_error(_("--section-start argument %s is not a valid hex number"),
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val_start);
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return;
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}
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addr <<= 4;
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addr += hex_value(*eq);
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}
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this->section_starts_[section_name] = addr;
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}
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// Look up a --section-start value.
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bool
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General_options::section_start(const char* secname, uint64_t* paddr) const
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{
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if (this->section_starts_.empty())
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return false;
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std::map<std::string, uint64_t>::const_iterator p =
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this->section_starts_.find(secname);
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if (p == this->section_starts_.end())
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return false;
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*paddr = p->second;
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return true;
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}
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void
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General_options::parse_static(const char*, const char*, Command_line*)
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{
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this->set_static(true);
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}
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void
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General_options::parse_script(const char*, const char* arg,
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Command_line* cmdline)
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{
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if (!read_commandline_script(arg, cmdline))
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gold::gold_fatal(_("unable to parse script file %s"), arg);
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}
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void
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General_options::parse_version_script(const char*, const char* arg,
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Command_line* cmdline)
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{
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if (!read_version_script(arg, cmdline))
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gold::gold_fatal(_("unable to parse version script file %s"), arg);
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}
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void
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General_options::parse_dynamic_list(const char*, const char* arg,
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Command_line* cmdline)
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{
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if (!read_dynamic_list(arg, cmdline, &this->dynamic_list_))
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gold::gold_fatal(_("unable to parse dynamic-list script file %s"), arg);
|
|
this->have_dynamic_list_ = true;
|
|
}
|
|
|
|
void
|
|
General_options::parse_start_group(const char*, const char*,
|
|
Command_line* cmdline)
|
|
{
|
|
cmdline->inputs().start_group();
|
|
}
|
|
|
|
void
|
|
General_options::parse_end_group(const char*, const char*,
|
|
Command_line* cmdline)
|
|
{
|
|
cmdline->inputs().end_group();
|
|
}
|
|
|
|
void
|
|
General_options::parse_start_lib(const char*, const char*,
|
|
Command_line* cmdline)
|
|
{
|
|
cmdline->inputs().start_lib(cmdline->position_dependent_options());
|
|
}
|
|
|
|
void
|
|
General_options::parse_end_lib(const char*, const char*,
|
|
Command_line* cmdline)
|
|
{
|
|
cmdline->inputs().end_lib();
|
|
}
|
|
|
|
// The function add_excluded_libs() in ld/ldlang.c of GNU ld breaks up a list
|
|
// of names separated by commas or colons and puts them in a linked list.
|
|
// We implement the same parsing of names here but store names in an unordered
|
|
// map to speed up searching of names.
|
|
|
|
void
|
|
General_options::parse_exclude_libs(const char*, const char* arg,
|
|
Command_line*)
|
|
{
|
|
const char* p = arg;
|
|
|
|
while (*p != '\0')
|
|
{
|
|
size_t length = strcspn(p, ",:");
|
|
this->excluded_libs_.insert(std::string(p, length));
|
|
p += (p[length] ? length + 1 : length);
|
|
}
|
|
}
|
|
|
|
// The checking logic is based on the function check_excluded_libs() in
|
|
// ld/ldlang.c of GNU ld but our implementation is different because we use
|
|
// an unordered map instead of a linked list, which is what GNU ld uses. GNU
|
|
// ld searches sequentially in the excluded libs list. For a given archive,
|
|
// a match is found if the archive's name matches exactly one of the list
|
|
// entry or if the archive's name is of the form FOO.a and FOO matches exactly
|
|
// one of the list entry. An entry "ALL" in the list is considered as a
|
|
// wild-card and matches any given name.
|
|
|
|
bool
|
|
General_options::check_excluded_libs(const std::string &name) const
|
|
{
|
|
Unordered_set<std::string>::const_iterator p;
|
|
|
|
// Exit early for the most common case.
|
|
if (excluded_libs_.empty())
|
|
return false;
|
|
|
|
// If we see "ALL", all archives are excluded from automatic export.
|
|
p = excluded_libs_.find(std::string("ALL"));
|
|
if (p != excluded_libs_.end())
|
|
return true;
|
|
|
|
// First strip off any directories in name.
|
|
const char* basename = lbasename(name.c_str());
|
|
|
|
// Try finding an exact match.
|
|
p = excluded_libs_.find(std::string(basename));
|
|
if (p != excluded_libs_.end())
|
|
return true;
|
|
|
|
// Try matching NAME without ".a" at the end.
|
|
size_t length = strlen(basename);
|
|
if ((length >= 2)
|
|
&& (basename[length - 2] == '.')
|
|
&& (basename[length - 1] == 'a'))
|
|
{
|
|
p = excluded_libs_.find(std::string(basename, length - 2));
|
|
if (p != excluded_libs_.end())
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// Recognize input and output target names. The GNU linker accepts
|
|
// these with --format and --oformat. This code is intended to be
|
|
// minimally compatible. In practice for an ELF target this would be
|
|
// the same target as the input files; that name always start with
|
|
// "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex",
|
|
// "binary", "ihex".
|
|
|
|
General_options::Object_format
|
|
General_options::string_to_object_format(const char* arg)
|
|
{
|
|
if (strncmp(arg, "elf", 3) == 0 || strcmp(arg, "default") == 0)
|
|
return gold::General_options::OBJECT_FORMAT_ELF;
|
|
else if (strcmp(arg, "binary") == 0)
|
|
return gold::General_options::OBJECT_FORMAT_BINARY;
|
|
else
|
|
{
|
|
gold::gold_error(_("format '%s' not supported; treating as elf "
|
|
"(supported formats: elf, binary)"),
|
|
arg);
|
|
return gold::General_options::OBJECT_FORMAT_ELF;
|
|
}
|
|
}
|
|
|
|
void
|
|
General_options::parse_fix_v4bx(const char*, const char*,
|
|
Command_line*)
|
|
{
|
|
this->fix_v4bx_ = FIX_V4BX_REPLACE;
|
|
}
|
|
|
|
void
|
|
General_options::parse_fix_v4bx_interworking(const char*, const char*,
|
|
Command_line*)
|
|
{
|
|
this->fix_v4bx_ = FIX_V4BX_INTERWORKING;
|
|
}
|
|
|
|
void
|
|
General_options::parse_EB(const char*, const char*, Command_line*)
|
|
{
|
|
this->endianness_ = ENDIANNESS_BIG;
|
|
}
|
|
|
|
void
|
|
General_options::parse_EL(const char*, const char*, Command_line*)
|
|
{
|
|
this->endianness_ = ENDIANNESS_LITTLE;
|
|
}
|
|
|
|
} // End namespace gold.
|
|
|
|
namespace
|
|
{
|
|
|
|
void
|
|
usage()
|
|
{
|
|
fprintf(stderr,
|
|
_("%s: use the --help option for usage information\n"),
|
|
gold::program_name);
|
|
::exit(EXIT_FAILURE);
|
|
}
|
|
|
|
void
|
|
usage(const char* msg, const char* opt)
|
|
{
|
|
fprintf(stderr,
|
|
_("%s: %s: %s\n"),
|
|
gold::program_name, opt, msg);
|
|
usage();
|
|
}
|
|
|
|
// If the default sysroot is relocatable, try relocating it based on
|
|
// the prefix FROM.
|
|
|
|
static char*
|
|
get_relative_sysroot(const char* from)
|
|
{
|
|
char* path = make_relative_prefix(gold::program_name, from,
|
|
TARGET_SYSTEM_ROOT);
|
|
if (path != NULL)
|
|
{
|
|
struct stat s;
|
|
if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode))
|
|
return path;
|
|
free(path);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
// Return the default sysroot. This is set by the --with-sysroot
|
|
// option to configure. Note we do not free the return value of
|
|
// get_relative_sysroot, which is a small memory leak, but is
|
|
// necessary since we store this pointer directly in General_options.
|
|
|
|
static const char*
|
|
get_default_sysroot()
|
|
{
|
|
const char* sysroot = TARGET_SYSTEM_ROOT;
|
|
if (*sysroot == '\0')
|
|
return NULL;
|
|
|
|
if (TARGET_SYSTEM_ROOT_RELOCATABLE)
|
|
{
|
|
char* path = get_relative_sysroot(BINDIR);
|
|
if (path == NULL)
|
|
path = get_relative_sysroot(TOOLBINDIR);
|
|
if (path != NULL)
|
|
return path;
|
|
}
|
|
|
|
return sysroot;
|
|
}
|
|
|
|
// Parse a long option. Such options have the form
|
|
// <-|--><option>[=arg]. If "=arg" is not present but the option
|
|
// takes an argument, the next word is taken to the be the argument.
|
|
// If equals_only is set, then only the <option>=<arg> form is
|
|
// accepted, not the <option><space><arg> form. Returns a One_option
|
|
// struct or NULL if argv[i] cannot be parsed as a long option. In
|
|
// the not-NULL case, *arg is set to the option's argument (NULL if
|
|
// the option takes no argument), and *i is advanced past this option.
|
|
// NOTE: it is safe for argv and arg to point to the same place.
|
|
gold::options::One_option*
|
|
parse_long_option(int argc, const char** argv, bool equals_only,
|
|
const char** arg, int* i)
|
|
{
|
|
const char* const this_argv = argv[*i];
|
|
|
|
const char* equals = strchr(this_argv, '=');
|
|
const char* option_start = this_argv + strspn(this_argv, "-");
|
|
std::string option(option_start,
|
|
equals ? equals - option_start : strlen(option_start));
|
|
|
|
gold::options::Option_map::iterator it
|
|
= gold::options::long_options->find(option);
|
|
if (it == gold::options::long_options->end())
|
|
return NULL;
|
|
|
|
gold::options::One_option* retval = it->second;
|
|
|
|
// If the dash-count doesn't match, we fail.
|
|
if (this_argv[0] != '-') // no dashes at all: had better be "-z <longopt>"
|
|
{
|
|
if (retval->dashes != gold::options::DASH_Z)
|
|
return NULL;
|
|
}
|
|
else if (this_argv[1] != '-') // one dash
|
|
{
|
|
if (retval->dashes != gold::options::ONE_DASH
|
|
&& retval->dashes != gold::options::EXACTLY_ONE_DASH
|
|
&& retval->dashes != gold::options::TWO_DASHES)
|
|
return NULL;
|
|
}
|
|
else // two dashes (or more!)
|
|
{
|
|
if (retval->dashes != gold::options::TWO_DASHES
|
|
&& retval->dashes != gold::options::EXACTLY_TWO_DASHES
|
|
&& retval->dashes != gold::options::ONE_DASH)
|
|
return NULL;
|
|
}
|
|
|
|
// Now that we know the option is good (or else bad in a way that
|
|
// will cause us to die), increment i to point past this argv.
|
|
++(*i);
|
|
|
|
// Figure out the option's argument, if any.
|
|
if (!retval->takes_argument())
|
|
{
|
|
if (equals)
|
|
usage(_("unexpected argument"), this_argv);
|
|
else
|
|
*arg = NULL;
|
|
}
|
|
else
|
|
{
|
|
if (equals)
|
|
*arg = equals + 1;
|
|
else if (retval->takes_optional_argument())
|
|
*arg = retval->default_value;
|
|
else if (*i < argc && !equals_only)
|
|
*arg = argv[(*i)++];
|
|
else
|
|
usage(_("missing argument"), this_argv);
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
// Parse a short option. Such options have the form -<option>[arg].
|
|
// If "arg" is not present but the option takes an argument, the next
|
|
// word is taken to the be the argument. If the option does not take
|
|
// an argument, it may be followed by another short option. Returns a
|
|
// One_option struct or NULL if argv[i] cannot be parsed as a short
|
|
// option. In the not-NULL case, *arg is set to the option's argument
|
|
// (NULL if the option takes no argument), and *i is advanced past
|
|
// this option. This function keeps *i the same if we parsed a short
|
|
// option that does not take an argument, that looks to be followed by
|
|
// another short option in the same word.
|
|
gold::options::One_option*
|
|
parse_short_option(int argc, const char** argv, int pos_in_argv_i,
|
|
const char** arg, int* i)
|
|
{
|
|
const char* const this_argv = argv[*i];
|
|
|
|
if (this_argv[0] != '-')
|
|
return NULL;
|
|
|
|
// We handle -z as a special case.
|
|
static gold::options::One_option dash_z("", gold::options::DASH_Z,
|
|
'z', "", NULL, "Z-OPTION", false,
|
|
NULL);
|
|
gold::options::One_option* retval = NULL;
|
|
if (this_argv[pos_in_argv_i] == 'z')
|
|
retval = &dash_z;
|
|
else
|
|
{
|
|
const int char_as_int = static_cast<int>(this_argv[pos_in_argv_i]);
|
|
if (char_as_int > 0 && char_as_int < 128)
|
|
retval = gold::options::short_options[char_as_int];
|
|
}
|
|
|
|
if (retval == NULL)
|
|
return NULL;
|
|
|
|
// Figure out the option's argument, if any.
|
|
if (!retval->takes_argument())
|
|
{
|
|
*arg = NULL;
|
|
// We only advance past this argument if it's the only one in argv.
|
|
if (this_argv[pos_in_argv_i + 1] == '\0')
|
|
++(*i);
|
|
}
|
|
else
|
|
{
|
|
// If we take an argument, we'll eat up this entire argv entry.
|
|
++(*i);
|
|
if (this_argv[pos_in_argv_i + 1] != '\0')
|
|
*arg = this_argv + pos_in_argv_i + 1;
|
|
else if (retval->takes_optional_argument())
|
|
*arg = retval->default_value;
|
|
else if (*i < argc)
|
|
*arg = argv[(*i)++];
|
|
else
|
|
usage(_("missing argument"), this_argv);
|
|
}
|
|
|
|
// If we're a -z option, we need to parse our argument as a
|
|
// long-option, e.g. "-z stacksize=8192".
|
|
if (retval == &dash_z)
|
|
{
|
|
int dummy_i = 0;
|
|
const char* dash_z_arg = *arg;
|
|
retval = parse_long_option(1, arg, true, arg, &dummy_i);
|
|
if (retval == NULL)
|
|
usage(_("unknown -z option"), dash_z_arg);
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
} // End anonymous namespace.
|
|
|
|
namespace gold
|
|
{
|
|
|
|
General_options::General_options()
|
|
: printed_version_(false),
|
|
execstack_status_(EXECSTACK_FROM_INPUT),
|
|
icf_status_(ICF_NONE),
|
|
static_(false),
|
|
do_demangle_(false),
|
|
plugins_(NULL),
|
|
dynamic_list_(),
|
|
have_dynamic_list_(false),
|
|
incremental_mode_(INCREMENTAL_OFF),
|
|
incremental_disposition_(INCREMENTAL_STARTUP),
|
|
incremental_startup_disposition_(INCREMENTAL_CHECK),
|
|
implicit_incremental_(false),
|
|
excluded_libs_(),
|
|
symbols_to_retain_(),
|
|
section_starts_(),
|
|
fix_v4bx_(FIX_V4BX_NONE),
|
|
endianness_(ENDIANNESS_NOT_SET)
|
|
{
|
|
// Turn off option registration once construction is complete.
|
|
gold::options::ready_to_register = false;
|
|
}
|
|
|
|
General_options::Object_format
|
|
General_options::format_enum() const
|
|
{
|
|
return General_options::string_to_object_format(this->format());
|
|
}
|
|
|
|
General_options::Object_format
|
|
General_options::oformat_enum() const
|
|
{
|
|
return General_options::string_to_object_format(this->oformat());
|
|
}
|
|
|
|
// Add the sysroot, if any, to the search paths.
|
|
|
|
void
|
|
General_options::add_sysroot()
|
|
{
|
|
if (this->sysroot() == NULL || this->sysroot()[0] == '\0')
|
|
{
|
|
this->set_sysroot(get_default_sysroot());
|
|
if (this->sysroot() == NULL || this->sysroot()[0] == '\0')
|
|
return;
|
|
}
|
|
|
|
char* canonical_sysroot = lrealpath(this->sysroot());
|
|
|
|
for (Dir_list::iterator p = this->library_path_.value.begin();
|
|
p != this->library_path_.value.end();
|
|
++p)
|
|
p->add_sysroot(this->sysroot(), canonical_sysroot);
|
|
|
|
free(canonical_sysroot);
|
|
}
|
|
|
|
// Return whether FILENAME is in a system directory.
|
|
|
|
bool
|
|
General_options::is_in_system_directory(const std::string& filename) const
|
|
{
|
|
for (Dir_list::const_iterator p = this->library_path_.value.begin();
|
|
p != this->library_path_.value.end();
|
|
++p)
|
|
{
|
|
// We use a straight string comparison rather than calling
|
|
// FILENAME_CMP because we are only interested in the cases
|
|
// where we found the file in a system directory, which means
|
|
// that we used the directory name as a prefix for a -L search.
|
|
if (p->is_system_directory()
|
|
&& filename.compare(0, p->name().size(), p->name()) == 0)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Add a plugin to the list of plugins.
|
|
|
|
void
|
|
General_options::add_plugin(const char* filename)
|
|
{
|
|
if (this->plugins_ == NULL)
|
|
this->plugins_ = new Plugin_manager(*this);
|
|
this->plugins_->add_plugin(filename);
|
|
}
|
|
|
|
// Add a plugin option to a plugin.
|
|
|
|
void
|
|
General_options::add_plugin_option(const char* arg)
|
|
{
|
|
if (this->plugins_ == NULL)
|
|
gold_fatal("--plugin-opt requires --plugin.");
|
|
this->plugins_->add_plugin_option(arg);
|
|
}
|
|
|
|
// Set up variables and other state that isn't set up automatically by
|
|
// the parse routine, and ensure options don't contradict each other
|
|
// and are otherwise kosher.
|
|
|
|
void
|
|
General_options::finalize()
|
|
{
|
|
// Normalize the strip modifiers. They have a total order:
|
|
// strip_all > strip_debug > strip_non_line > strip_debug_gdb.
|
|
// If one is true, set all beneath it to true as well.
|
|
if (this->strip_all())
|
|
this->set_strip_debug(true);
|
|
if (this->strip_debug())
|
|
this->set_strip_debug_non_line(true);
|
|
if (this->strip_debug_non_line())
|
|
this->set_strip_debug_gdb(true);
|
|
|
|
if (this->Bshareable())
|
|
this->set_shared(true);
|
|
|
|
// If the user specifies both -s and -r, convert the -s to -S.
|
|
// -r requires us to keep externally visible symbols!
|
|
if (this->strip_all() && this->relocatable())
|
|
{
|
|
this->set_strip_all(false);
|
|
gold_assert(this->strip_debug());
|
|
}
|
|
|
|
// For us, -dc and -dp are synonyms for --define-common.
|
|
if (this->dc())
|
|
this->set_define_common(true);
|
|
if (this->dp())
|
|
this->set_define_common(true);
|
|
|
|
// We also set --define-common if we're not relocatable, as long as
|
|
// the user didn't explicitly ask for something different.
|
|
if (!this->user_set_define_common())
|
|
this->set_define_common(!this->relocatable());
|
|
|
|
// execstack_status_ is a three-state variable; update it based on
|
|
// -z [no]execstack.
|
|
if (this->execstack())
|
|
this->set_execstack_status(EXECSTACK_YES);
|
|
else if (this->noexecstack())
|
|
this->set_execstack_status(EXECSTACK_NO);
|
|
|
|
// icf_status_ is a three-state variable; update it based on the
|
|
// value of this->icf().
|
|
if (strcmp(this->icf(), "none") == 0)
|
|
this->set_icf_status(ICF_NONE);
|
|
else if (strcmp(this->icf(), "safe") == 0)
|
|
this->set_icf_status(ICF_SAFE);
|
|
else
|
|
this->set_icf_status(ICF_ALL);
|
|
|
|
// Handle the optional argument for --demangle.
|
|
if (this->user_set_demangle())
|
|
{
|
|
this->set_do_demangle(true);
|
|
const char* style = this->demangle();
|
|
if (*style != '\0')
|
|
{
|
|
enum demangling_styles style_code;
|
|
|
|
style_code = cplus_demangle_name_to_style(style);
|
|
if (style_code == unknown_demangling)
|
|
gold_fatal("unknown demangling style '%s'", style);
|
|
cplus_demangle_set_style(style_code);
|
|
}
|
|
}
|
|
else if (this->user_set_no_demangle())
|
|
this->set_do_demangle(false);
|
|
else
|
|
{
|
|
// Testing COLLECT_NO_DEMANGLE makes our default demangling
|
|
// behaviour identical to that of gcc's linker wrapper.
|
|
this->set_do_demangle(getenv("COLLECT_NO_DEMANGLE") == NULL);
|
|
}
|
|
|
|
// -M is equivalent to "-Map -".
|
|
if (this->print_map() && !this->user_set_Map())
|
|
{
|
|
this->set_Map("-");
|
|
this->set_user_set_Map();
|
|
}
|
|
|
|
// Using -n or -N implies -static.
|
|
if (this->nmagic() || this->omagic())
|
|
this->set_static(true);
|
|
|
|
// If --thread_count is specified, it applies to
|
|
// --thread-count-{initial,middle,final}, though it doesn't override
|
|
// them.
|
|
if (this->thread_count() > 0 && this->thread_count_initial() == 0)
|
|
this->set_thread_count_initial(this->thread_count());
|
|
if (this->thread_count() > 0 && this->thread_count_middle() == 0)
|
|
this->set_thread_count_middle(this->thread_count());
|
|
if (this->thread_count() > 0 && this->thread_count_final() == 0)
|
|
this->set_thread_count_final(this->thread_count());
|
|
|
|
// Let's warn if you set the thread-count but we're going to ignore it.
|
|
#ifndef ENABLE_THREADS
|
|
if (this->threads())
|
|
{
|
|
gold_warning(_("ignoring --threads: "
|
|
"%s was compiled without thread support"),
|
|
program_name);
|
|
this->set_threads(false);
|
|
}
|
|
if (this->thread_count() > 0 || this->thread_count_initial() > 0
|
|
|| this->thread_count_middle() > 0 || this->thread_count_final() > 0)
|
|
gold_warning(_("ignoring --thread-count: "
|
|
"%s was compiled without thread support"),
|
|
program_name);
|
|
#endif
|
|
|
|
std::string libpath;
|
|
if (this->user_set_Y())
|
|
{
|
|
libpath = this->Y();
|
|
if (libpath.compare(0, 2, "P,") == 0)
|
|
libpath.erase(0, 2);
|
|
}
|
|
else if (!this->nostdlib())
|
|
{
|
|
#ifndef NATIVE_LINKER
|
|
#define NATIVE_LINKER 0
|
|
#endif
|
|
const char* p = LIB_PATH;
|
|
if (strcmp(p, "::DEFAULT::") != 0)
|
|
libpath = p;
|
|
else if (NATIVE_LINKER
|
|
|| this->user_set_sysroot()
|
|
|| *TARGET_SYSTEM_ROOT != '\0')
|
|
{
|
|
this->add_to_library_path_with_sysroot("/lib");
|
|
this->add_to_library_path_with_sysroot("/usr/lib");
|
|
}
|
|
else
|
|
this->add_to_library_path_with_sysroot(TOOLLIBDIR);
|
|
}
|
|
|
|
if (!libpath.empty())
|
|
{
|
|
size_t pos = 0;
|
|
size_t next_pos;
|
|
do
|
|
{
|
|
next_pos = libpath.find(':', pos);
|
|
size_t len = (next_pos == std::string::npos
|
|
? next_pos
|
|
: next_pos - pos);
|
|
if (len != 0)
|
|
this->add_to_library_path_with_sysroot(libpath.substr(pos, len));
|
|
pos = next_pos + 1;
|
|
}
|
|
while (next_pos != std::string::npos);
|
|
}
|
|
|
|
// Parse the contents of -retain-symbols-file into a set.
|
|
if (this->retain_symbols_file())
|
|
{
|
|
std::ifstream in;
|
|
in.open(this->retain_symbols_file());
|
|
if (!in)
|
|
gold_fatal(_("unable to open -retain-symbols-file file %s: %s"),
|
|
this->retain_symbols_file(), strerror(errno));
|
|
std::string line;
|
|
std::getline(in, line); // this chops off the trailing \n, if any
|
|
while (in)
|
|
{
|
|
if (!line.empty() && line[line.length() - 1] == '\r') // Windows
|
|
line.resize(line.length() - 1);
|
|
this->symbols_to_retain_.insert(line);
|
|
std::getline(in, line);
|
|
}
|
|
}
|
|
|
|
// -Bgroup implies --unresolved-symbols=report-all.
|
|
if (this->Bgroup() && !this->user_set_unresolved_symbols())
|
|
this->set_unresolved_symbols("report-all");
|
|
|
|
// -shared implies --allow-shlib-undefined. Currently
|
|
// ---allow-shlib-undefined controls warnings issued based on the
|
|
// -symbol table. --unresolved-symbols controls warnings issued
|
|
// -based on relocations.
|
|
if (this->shared() && !this->user_set_allow_shlib_undefined())
|
|
this->set_allow_shlib_undefined(true);
|
|
|
|
// Normalize library_path() by adding the sysroot to all directories
|
|
// in the path, as appropriate.
|
|
this->add_sysroot();
|
|
|
|
// --dynamic-list overrides -Bsymbolic and -Bsymbolic-functions.
|
|
if (this->have_dynamic_list())
|
|
{
|
|
this->set_Bsymbolic(false);
|
|
this->set_Bsymbolic_functions(false);
|
|
}
|
|
|
|
// Now that we've normalized the options, check for contradictory ones.
|
|
if (this->shared() && this->is_static())
|
|
gold_fatal(_("-shared and -static are incompatible"));
|
|
if (this->shared() && this->pie())
|
|
gold_fatal(_("-shared and -pie are incompatible"));
|
|
if (this->pie() && this->is_static())
|
|
gold_fatal(_("-pie and -static are incompatible"));
|
|
|
|
if (this->shared() && this->relocatable())
|
|
gold_fatal(_("-shared and -r are incompatible"));
|
|
if (this->pie() && this->relocatable())
|
|
gold_fatal(_("-pie and -r are incompatible"));
|
|
|
|
if (!this->shared())
|
|
{
|
|
if (this->filter() != NULL)
|
|
gold_fatal(_("-F/--filter may not used without -shared"));
|
|
if (this->any_auxiliary())
|
|
gold_fatal(_("-f/--auxiliary may not be used without -shared"));
|
|
}
|
|
|
|
// TODO: implement support for -retain-symbols-file with -r, if needed.
|
|
if (this->relocatable() && this->retain_symbols_file())
|
|
gold_fatal(_("-retain-symbols-file does not yet work with -r"));
|
|
|
|
if (this->oformat_enum() != General_options::OBJECT_FORMAT_ELF
|
|
&& (this->shared()
|
|
|| this->pie()
|
|
|| this->relocatable()))
|
|
gold_fatal(_("binary output format not compatible "
|
|
"with -shared or -pie or -r"));
|
|
|
|
if (this->user_set_hash_bucket_empty_fraction()
|
|
&& (this->hash_bucket_empty_fraction() < 0.0
|
|
|| this->hash_bucket_empty_fraction() >= 1.0))
|
|
gold_fatal(_("--hash-bucket-empty-fraction value %g out of range "
|
|
"[0.0, 1.0)"),
|
|
this->hash_bucket_empty_fraction());
|
|
|
|
if (this->implicit_incremental_ && this->incremental_mode_ == INCREMENTAL_OFF)
|
|
gold_fatal(_("Options --incremental-changed, --incremental-unchanged, "
|
|
"--incremental-unknown require the use of --incremental"));
|
|
|
|
// Check for options that are not compatible with incremental linking.
|
|
// Where an option can be disabled without seriously changing the semantics
|
|
// of the link, we turn the option off; otherwise, we issue a fatal error.
|
|
|
|
if (this->incremental_mode_ != INCREMENTAL_OFF)
|
|
{
|
|
if (this->relocatable())
|
|
gold_fatal(_("incremental linking is not compatible with -r"));
|
|
if (this->emit_relocs())
|
|
gold_fatal(_("incremental linking is not compatible with "
|
|
"--emit-relocs"));
|
|
if (this->has_plugins())
|
|
gold_fatal(_("incremental linking is not compatible with --plugin"));
|
|
if (this->gc_sections())
|
|
{
|
|
gold_warning(_("ignoring --gc-sections for an incremental link"));
|
|
this->set_gc_sections(false);
|
|
}
|
|
if (this->icf_enabled())
|
|
{
|
|
gold_warning(_("ignoring --icf for an incremental link"));
|
|
this->set_icf_status(ICF_NONE);
|
|
}
|
|
if (strcmp(this->compress_debug_sections(), "none") != 0)
|
|
{
|
|
gold_warning(_("ignoring --compress-debug-sections for an "
|
|
"incremental link"));
|
|
this->set_compress_debug_sections("none");
|
|
}
|
|
}
|
|
|
|
// --rosegment-gap implies --rosegment.
|
|
if (this->user_set_rosegment_gap())
|
|
this->set_rosegment(true);
|
|
|
|
// FIXME: we can/should be doing a lot more sanity checking here.
|
|
}
|
|
|
|
// Search_directory methods.
|
|
|
|
// This is called if we have a sysroot. Apply the sysroot if
|
|
// appropriate. Record whether the directory is in the sysroot.
|
|
|
|
void
|
|
Search_directory::add_sysroot(const char* sysroot,
|
|
const char* canonical_sysroot)
|
|
{
|
|
gold_assert(*sysroot != '\0');
|
|
if (this->put_in_sysroot_)
|
|
{
|
|
if (!IS_DIR_SEPARATOR(this->name_[0])
|
|
&& !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1]))
|
|
this->name_ = '/' + this->name_;
|
|
this->name_ = sysroot + this->name_;
|
|
this->is_in_sysroot_ = true;
|
|
}
|
|
else
|
|
{
|
|
// Check whether this entry is in the sysroot. To do this
|
|
// correctly, we need to use canonical names. Otherwise we will
|
|
// get confused by the ../../.. paths that gcc tends to use.
|
|
char* canonical_name = lrealpath(this->name_.c_str());
|
|
int canonical_name_len = strlen(canonical_name);
|
|
int canonical_sysroot_len = strlen(canonical_sysroot);
|
|
if (canonical_name_len > canonical_sysroot_len
|
|
&& IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len]))
|
|
{
|
|
canonical_name[canonical_sysroot_len] = '\0';
|
|
if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0)
|
|
this->is_in_sysroot_ = true;
|
|
}
|
|
free(canonical_name);
|
|
}
|
|
}
|
|
|
|
// Input_arguments methods.
|
|
|
|
// Add a file to the list.
|
|
|
|
Input_argument&
|
|
Input_arguments::add_file(Input_file_argument& file)
|
|
{
|
|
file.set_arg_serial(++this->file_count_);
|
|
if (this->in_group_)
|
|
{
|
|
gold_assert(!this->input_argument_list_.empty());
|
|
gold_assert(this->input_argument_list_.back().is_group());
|
|
return this->input_argument_list_.back().group()->add_file(file);
|
|
}
|
|
if (this->in_lib_)
|
|
{
|
|
gold_assert(!this->input_argument_list_.empty());
|
|
gold_assert(this->input_argument_list_.back().is_lib());
|
|
return this->input_argument_list_.back().lib()->add_file(file);
|
|
}
|
|
this->input_argument_list_.push_back(Input_argument(file));
|
|
return this->input_argument_list_.back();
|
|
}
|
|
|
|
// Start a group.
|
|
|
|
void
|
|
Input_arguments::start_group()
|
|
{
|
|
if (this->in_group_)
|
|
gold_fatal(_("May not nest groups"));
|
|
if (this->in_lib_)
|
|
gold_fatal(_("may not nest groups in libraries"));
|
|
Input_file_group* group = new Input_file_group();
|
|
this->input_argument_list_.push_back(Input_argument(group));
|
|
this->in_group_ = true;
|
|
}
|
|
|
|
// End a group.
|
|
|
|
void
|
|
Input_arguments::end_group()
|
|
{
|
|
if (!this->in_group_)
|
|
gold_fatal(_("Group end without group start"));
|
|
this->in_group_ = false;
|
|
}
|
|
|
|
// Start a lib.
|
|
|
|
void
|
|
Input_arguments::start_lib(const Position_dependent_options& options)
|
|
{
|
|
if (this->in_lib_)
|
|
gold_fatal(_("may not nest libraries"));
|
|
if (this->in_group_)
|
|
gold_fatal(_("may not nest libraries in groups"));
|
|
Input_file_lib* lib = new Input_file_lib(options);
|
|
this->input_argument_list_.push_back(Input_argument(lib));
|
|
this->in_lib_ = true;
|
|
}
|
|
|
|
// End a lib.
|
|
|
|
void
|
|
Input_arguments::end_lib()
|
|
{
|
|
if (!this->in_lib_)
|
|
gold_fatal(_("lib end without lib start"));
|
|
this->in_lib_ = false;
|
|
}
|
|
|
|
// Command_line options.
|
|
|
|
Command_line::Command_line()
|
|
{
|
|
}
|
|
|
|
// Pre_options is the hook that sets the ready_to_register flag.
|
|
|
|
Command_line::Pre_options::Pre_options()
|
|
{
|
|
gold::options::ready_to_register = true;
|
|
}
|
|
|
|
// Process the command line options. For process_one_option, i is the
|
|
// index of argv to process next, and must be an option (that is,
|
|
// start with a dash). The return value is the index of the next
|
|
// option to process (i+1 or i+2, or argc to indicate processing is
|
|
// done). no_more_options is set to true if (and when) "--" is seen
|
|
// as an option.
|
|
|
|
int
|
|
Command_line::process_one_option(int argc, const char** argv, int i,
|
|
bool* no_more_options)
|
|
{
|
|
gold_assert(argv[i][0] == '-' && !(*no_more_options));
|
|
|
|
// If we are reading "--", then just set no_more_options and return.
|
|
if (argv[i][1] == '-' && argv[i][2] == '\0')
|
|
{
|
|
*no_more_options = true;
|
|
return i + 1;
|
|
}
|
|
|
|
int new_i = i;
|
|
options::One_option* option = NULL;
|
|
const char* arg = NULL;
|
|
|
|
// First, try to process argv as a long option.
|
|
option = parse_long_option(argc, argv, false, &arg, &new_i);
|
|
if (option)
|
|
{
|
|
option->reader->parse_to_value(argv[i], arg, this, &this->options_);
|
|
return new_i;
|
|
}
|
|
|
|
// Now, try to process argv as a short option. Since several short
|
|
// options can be combined in one argv, we may have to parse a lot
|
|
// until we're done reading this argv.
|
|
int pos_in_argv_i = 1;
|
|
while (new_i == i)
|
|
{
|
|
option = parse_short_option(argc, argv, pos_in_argv_i, &arg, &new_i);
|
|
if (!option)
|
|
break;
|
|
option->reader->parse_to_value(argv[i], arg, this, &this->options_);
|
|
++pos_in_argv_i;
|
|
}
|
|
if (option)
|
|
return new_i;
|
|
|
|
// I guess it's neither a long option nor a short option.
|
|
usage(_("unknown option"), argv[i]);
|
|
return argc;
|
|
}
|
|
|
|
|
|
void
|
|
Command_line::process(int argc, const char** argv)
|
|
{
|
|
bool no_more_options = false;
|
|
int i = 0;
|
|
while (i < argc)
|
|
{
|
|
this->position_options_.copy_from_options(this->options());
|
|
if (no_more_options || argv[i][0] != '-')
|
|
{
|
|
Input_file_argument file(argv[i],
|
|
Input_file_argument::INPUT_FILE_TYPE_FILE,
|
|
"", false, this->position_options_);
|
|
this->inputs_.add_file(file);
|
|
++i;
|
|
}
|
|
else
|
|
i = process_one_option(argc, argv, i, &no_more_options);
|
|
}
|
|
|
|
if (this->inputs_.in_group())
|
|
{
|
|
fprintf(stderr, _("%s: missing group end\n"), program_name);
|
|
usage();
|
|
}
|
|
|
|
// Normalize the options and ensure they don't contradict each other.
|
|
this->options_.finalize();
|
|
}
|
|
|
|
// Finalize the version script options and return them.
|
|
|
|
const Version_script_info&
|
|
Command_line::version_script()
|
|
{
|
|
this->options_.finalize_dynamic_list();
|
|
Version_script_info* vsi = this->script_options_.version_script_info();
|
|
vsi->finalize();
|
|
return *vsi;
|
|
}
|
|
|
|
} // End namespace gold.
|