21bb3914d6
* arm.cc (Scan::local_reloc_may_be_function_pointer): New function. (Scan::global_reloc_may_be_function_pointer): New function. * sparc.cc (Scan::local_reloc_may_be_function_pointer): New function. (Scan::global_reloc_may_be_function_pointer): New function. * powerpc.cc (Scan::local_reloc_may_be_function_pointer): New function. (Scan::global_reloc_may_be_function_pointer): New function. * i386.cc (Scan::local_reloc_may_be_function_pointer): New function. (Scan::global_reloc_may_be_function_pointer): New function. * x86_64.cc (Scan::local_reloc_may_be_function_pointer): New function. (Scan::global_reloc_may_be_function_pointer): New function. (Scan::possible_function_pointer_reloc): New function. (Target_x86_64::can_check_for_function_pointers): New function. * gc.h (gc_process_relocs): Scan relocation types to determine if function pointers were taken for targets that support it. * icf.cc (Icf::find_identical_sections): Include functions for folding in safe ICF whose pointer is not taken. * icf.h (Secn_fptr_taken_set): New typedef. (fptr_section_id_): New member. (section_has_function_pointers): New function. (set_section_has_function_pointers): New function. (check_section_for_function_pointers): New function. * options.h: Fix comment for safe ICF option. * target.h (can_check_for_function_pointers): New function. * testsuite/Makefile.am: Add icf_safe_so_test test case. Modify icf_safe_test for X86-64. * testsuite/Makefile.in: Regenerate. * testsuite/icf_safe_so_test.cc: New file. * testsuite/icf_safe_so_test.sh: New file. * testsuite/icf_safe_test.cc (kept_func_3): New function. (main): Change to take pointer to function kept_func_3. * testsuite/icf_safe_test.sh (arch_specific_safe_fold): Check if safe folding is done correctly for X86-64.
1718 lines
65 KiB
C++
1718 lines
65 KiB
C++
// options.h -- handle command line options for gold -*- C++ -*-
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// Copyright 2006, 2007, 2008, 2009, 2010 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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// General_options (from Command_line::options())
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// All the options (a.k.a. command-line flags)
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// Input_argument (from Command_line::inputs())
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// The list of input files, including -l options.
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// Command_line
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// Everything we get from the command line -- the General_options
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// plus the Input_arguments.
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//
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// There are also some smaller classes, such as
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// Position_dependent_options which hold a subset of General_options
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// that change as options are parsed (as opposed to the usual behavior
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// of the last instance of that option specified on the commandline wins).
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#ifndef GOLD_OPTIONS_H
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#define GOLD_OPTIONS_H
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#include <cstdlib>
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#include <cstring>
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#include <list>
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#include <map>
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#include <string>
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#include <vector>
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#include "elfcpp.h"
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#include "script.h"
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namespace gold
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{
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class Command_line;
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class General_options;
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class Search_directory;
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class Input_file_group;
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class Position_dependent_options;
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class Target;
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class Plugin_manager;
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// Incremental build action for a specific file, as selected by the user.
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enum Incremental_disposition
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{
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// Determine the status from the timestamp (default).
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INCREMENTAL_CHECK,
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// Assume the file changed from the previous build.
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INCREMENTAL_CHANGED,
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// Assume the file didn't change from the previous build.
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INCREMENTAL_UNCHANGED
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};
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// The nested namespace is to contain all the global variables and
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// structs that need to be defined in the .h file, but do not need to
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// be used outside this class.
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namespace options
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{
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typedef std::vector<Search_directory> Dir_list;
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typedef Unordered_set<std::string> String_set;
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// These routines convert from a string option to various types.
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// Each gives a fatal error if it cannot parse the argument.
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extern void
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parse_bool(const char* option_name, const char* arg, bool* retval);
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extern void
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parse_int(const char* option_name, const char* arg, int* retval);
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extern void
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parse_uint(const char* option_name, const char* arg, int* retval);
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extern void
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parse_uint64(const char* option_name, const char* arg, uint64_t* retval);
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extern void
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parse_double(const char* option_name, const char* arg, double* retval);
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extern void
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parse_string(const char* option_name, const char* arg, const char** retval);
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extern void
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parse_optional_string(const char* option_name, const char* arg,
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const char** retval);
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extern void
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parse_dirlist(const char* option_name, const char* arg, Dir_list* retval);
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extern void
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parse_set(const char* option_name, const char* arg, String_set* retval);
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extern 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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struct Struct_var;
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// Most options have both a shortname (one letter) and a longname.
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// This enum controls how many dashes are expected for longname access
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// -- shortnames always use one dash. Most longnames will accept
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// either one dash or two; the only difference between ONE_DASH and
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// TWO_DASHES is how we print the option in --help. However, some
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// longnames require two dashes, and some require only one. The
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// special value DASH_Z means that the option is preceded by "-z".
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enum Dashes
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{
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ONE_DASH, TWO_DASHES, EXACTLY_ONE_DASH, EXACTLY_TWO_DASHES, DASH_Z
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};
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// LONGNAME is the long-name of the option with dashes converted to
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// underscores, or else the short-name if the option has no long-name.
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// It is never the empty string.
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// DASHES is an instance of the Dashes enum: ONE_DASH, TWO_DASHES, etc.
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// SHORTNAME is the short-name of the option, as a char, or '\0' if the
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// option has no short-name. If the option has no long-name, you
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// should specify the short-name in *both* VARNAME and here.
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// DEFAULT_VALUE is the value of the option if not specified on the
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// commandline, as a string.
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// HELPSTRING is the descriptive text used with the option via --help
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// HELPARG is how you define the argument to the option.
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// --help output is "-shortname HELPARG, --longname HELPARG: HELPSTRING"
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// HELPARG should be NULL iff the option is a bool and takes no arg.
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// OPTIONAL_ARG is true if this option takes an optional argument. An
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// optional argument must be specifid as --OPTION=VALUE, not
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// --OPTION VALUE.
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// READER provides parse_to_value, which is a function that will convert
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// a char* argument into the proper type and store it in some variable.
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// A One_option struct initializes itself with the global list of options
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// at constructor time, so be careful making one of these.
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struct One_option
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{
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std::string longname;
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Dashes dashes;
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char shortname;
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const char* default_value;
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const char* helpstring;
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const char* helparg;
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bool optional_arg;
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Struct_var* reader;
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One_option(const char* ln, Dashes d, char sn, const char* dv,
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const char* hs, const char* ha, bool oa, Struct_var* r)
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: longname(ln), dashes(d), shortname(sn), default_value(dv ? dv : ""),
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helpstring(hs), helparg(ha), optional_arg(oa), reader(r)
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{
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// In longname, we convert all underscores to dashes, since GNU
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// style uses dashes in option names. longname is likely to have
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// underscores in it because it's also used to declare a C++
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// function.
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const char* pos = strchr(this->longname.c_str(), '_');
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for (; pos; pos = strchr(pos, '_'))
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this->longname[pos - this->longname.c_str()] = '-';
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// We only register ourselves if our helpstring is not NULL. This
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// is to support the "no-VAR" boolean variables, which we
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// conditionally turn on by defining "no-VAR" help text.
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if (this->helpstring)
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this->register_option();
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}
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// This option takes an argument iff helparg is not NULL.
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bool
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takes_argument() const
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{ return this->helparg != NULL; }
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// Whether the argument is optional.
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bool
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takes_optional_argument() const
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{ return this->optional_arg; }
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// Register this option with the global list of options.
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void
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register_option();
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// Print this option to stdout (used with --help).
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void
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print() const;
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};
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// All options have a Struct_##varname that inherits from this and
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// actually implements parse_to_value for that option.
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struct Struct_var
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{
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// OPTION: the name of the option as specified on the commandline,
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// including leading dashes, and any text following the option:
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// "-O", "--defsym=mysym=0x1000", etc.
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// ARG: the arg associated with this option, or NULL if the option
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// takes no argument: "2", "mysym=0x1000", etc.
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// CMDLINE: the global Command_line object. Used by DEFINE_special.
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// OPTIONS: the global General_options object. Used by DEFINE_special.
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virtual void
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parse_to_value(const char* option, const char* arg,
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Command_line* cmdline, General_options* options) = 0;
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virtual
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~Struct_var() // To make gcc happy.
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{ }
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};
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// This is for "special" options that aren't of any predefined type.
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struct Struct_special : public Struct_var
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{
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// If you change this, change the parse-fn in DEFINE_special as well.
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typedef void (General_options::*Parse_function)(const char*, const char*,
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Command_line*);
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Struct_special(const char* varname, Dashes dashes, char shortname,
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Parse_function parse_function,
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const char* helpstring, const char* helparg)
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: option(varname, dashes, shortname, "", helpstring, helparg, false, this),
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parse(parse_function)
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{ }
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void parse_to_value(const char* option, const char* arg,
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Command_line* cmdline, General_options* options)
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{ (options->*(this->parse))(option, arg, cmdline); }
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One_option option;
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Parse_function parse;
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};
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} // End namespace options.
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// These are helper macros use by DEFINE_uint64/etc below.
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// This macro is used inside the General_options_ class, so defines
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// var() and set_var() as General_options methods. Arguments as are
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// for the constructor for One_option. param_type__ is the same as
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// type__ for built-in types, and "const type__ &" otherwise.
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//
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// When we define the linker command option "assert", the macro argument
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// varname__ of DEFINE_var below will be replaced by "assert". On Mac OSX
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// assert.h is included implicitly by one of the library headers we use. To
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// avoid unintended macro substitution of "assert()", we need to enclose
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// varname__ with parenthese.
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#define DEFINE_var(varname__, dashes__, shortname__, default_value__, \
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default_value_as_string__, helpstring__, helparg__, \
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optional_arg__, type__, param_type__, parse_fn__) \
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public: \
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param_type__ \
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(varname__)() const \
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{ return this->varname__##_.value; } \
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\
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bool \
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user_set_##varname__() const \
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{ return this->varname__##_.user_set_via_option; } \
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\
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void \
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set_user_set_##varname__() \
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{ this->varname__##_.user_set_via_option = true; } \
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\
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private: \
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struct Struct_##varname__ : public options::Struct_var \
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{ \
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Struct_##varname__() \
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: option(#varname__, dashes__, shortname__, default_value_as_string__, \
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helpstring__, helparg__, optional_arg__, this), \
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user_set_via_option(false), value(default_value__) \
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{ } \
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\
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void \
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parse_to_value(const char* option_name, const char* arg, \
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Command_line*, General_options*) \
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{ \
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parse_fn__(option_name, arg, &this->value); \
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this->user_set_via_option = true; \
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} \
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\
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options::One_option option; \
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bool user_set_via_option; \
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type__ value; \
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}; \
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Struct_##varname__ varname__##_; \
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void \
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set_##varname__(param_type__ value) \
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{ this->varname__##_.value = value; }
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// These macros allow for easy addition of a new commandline option.
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// If no_helpstring__ is not NULL, then in addition to creating
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// VARNAME, we also create an option called no-VARNAME (or, for a -z
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// option, noVARNAME).
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#define DEFINE_bool(varname__, dashes__, shortname__, default_value__, \
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helpstring__, no_helpstring__) \
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DEFINE_var(varname__, dashes__, shortname__, default_value__, \
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default_value__ ? "true" : "false", helpstring__, NULL, \
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false, bool, bool, options::parse_bool) \
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struct Struct_no_##varname__ : public options::Struct_var \
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{ \
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Struct_no_##varname__() : option((dashes__ == options::DASH_Z \
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? "no" #varname__ \
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: "no-" #varname__), \
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dashes__, '\0', \
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default_value__ ? "false" : "true", \
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no_helpstring__, NULL, false, this) \
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{ } \
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\
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void \
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parse_to_value(const char*, const char*, \
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Command_line*, General_options* options) \
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{ \
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options->set_##varname__(false); \
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options->set_user_set_##varname__(); \
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} \
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\
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options::One_option option; \
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}; \
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Struct_no_##varname__ no_##varname__##_initializer_
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#define DEFINE_enable(varname__, dashes__, shortname__, default_value__, \
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helpstring__, no_helpstring__) \
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DEFINE_var(enable_##varname__, dashes__, shortname__, default_value__, \
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default_value__ ? "true" : "false", helpstring__, NULL, \
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false, bool, bool, options::parse_bool) \
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struct Struct_disable_##varname__ : public options::Struct_var \
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{ \
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Struct_disable_##varname__() : option("disable-" #varname__, \
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dashes__, '\0', \
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default_value__ ? "false" : "true", \
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no_helpstring__, NULL, false, this) \
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{ } \
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\
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void \
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parse_to_value(const char*, const char*, \
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Command_line*, General_options* options) \
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{ options->set_enable_##varname__(false); } \
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\
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options::One_option option; \
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}; \
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Struct_disable_##varname__ disable_##varname__##_initializer_
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#define DEFINE_int(varname__, dashes__, shortname__, default_value__, \
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helpstring__, helparg__) \
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DEFINE_var(varname__, dashes__, shortname__, default_value__, \
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#default_value__, helpstring__, helparg__, false, \
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int, int, options::parse_int)
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#define DEFINE_uint(varname__, dashes__, shortname__, default_value__, \
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helpstring__, helparg__) \
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DEFINE_var(varname__, dashes__, shortname__, default_value__, \
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#default_value__, helpstring__, helparg__, false, \
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int, int, options::parse_uint)
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#define DEFINE_uint64(varname__, dashes__, shortname__, default_value__, \
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helpstring__, helparg__) \
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DEFINE_var(varname__, dashes__, shortname__, default_value__, \
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#default_value__, helpstring__, helparg__, false, \
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uint64_t, uint64_t, options::parse_uint64)
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#define DEFINE_double(varname__, dashes__, shortname__, default_value__, \
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helpstring__, helparg__) \
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DEFINE_var(varname__, dashes__, shortname__, default_value__, \
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#default_value__, helpstring__, helparg__, false, \
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double, double, options::parse_double)
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#define DEFINE_string(varname__, dashes__, shortname__, default_value__, \
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helpstring__, helparg__) \
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DEFINE_var(varname__, dashes__, shortname__, default_value__, \
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default_value__, helpstring__, helparg__, false, \
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const char*, const char*, options::parse_string)
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// This is like DEFINE_string, but we convert each occurrence to a
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// Search_directory and store it in a vector. Thus we also have the
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// add_to_VARNAME() method, to append to the vector.
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#define DEFINE_dirlist(varname__, dashes__, shortname__, \
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helpstring__, helparg__) \
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DEFINE_var(varname__, dashes__, shortname__, , \
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"", helpstring__, helparg__, false, options::Dir_list, \
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const options::Dir_list&, options::parse_dirlist) \
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void \
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add_to_##varname__(const char* new_value) \
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{ options::parse_dirlist(NULL, new_value, &this->varname__##_.value); } \
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void \
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add_search_directory_to_##varname__(const Search_directory& dir) \
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{ this->varname__##_.value.push_back(dir); }
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// This is like DEFINE_string, but we store a set of strings.
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#define DEFINE_set(varname__, dashes__, shortname__, \
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helpstring__, helparg__) \
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DEFINE_var(varname__, dashes__, shortname__, , \
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"", helpstring__, helparg__, false, options::String_set, \
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const options::String_set&, options::parse_set) \
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public: \
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bool \
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any_##varname__() const \
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{ return !this->varname__##_.value.empty(); } \
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\
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bool \
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is_##varname__(const char* symbol) const \
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{ \
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return (!this->varname__##_.value.empty() \
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&& (this->varname__##_.value.find(std::string(symbol)) \
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!= this->varname__##_.value.end())); \
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} \
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\
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options::String_set::const_iterator \
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varname__##_begin() const \
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{ return this->varname__##_.value.begin(); } \
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\
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options::String_set::const_iterator \
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varname__##_end() const \
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{ return this->varname__##_.value.end(); }
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|
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// When you have a list of possible values (expressed as string)
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// After helparg__ should come an initializer list, like
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// {"foo", "bar", "baz"}
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#define DEFINE_enum(varname__, dashes__, shortname__, default_value__, \
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helpstring__, helparg__, ...) \
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DEFINE_var(varname__, dashes__, shortname__, default_value__, \
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default_value__, helpstring__, helparg__, false, \
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const char*, const char*, parse_choices_##varname__) \
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private: \
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static void parse_choices_##varname__(const char* option_name, \
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const char* arg, \
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const char** retval) { \
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const char* choices[] = __VA_ARGS__; \
|
|
options::parse_choices(option_name, arg, retval, \
|
|
choices, sizeof(choices) / sizeof(*choices)); \
|
|
}
|
|
|
|
// This is like DEFINE_bool, but VARNAME is the name of a different
|
|
// option. This option becomes an alias for that one. INVERT is true
|
|
// if this option is an inversion of the other one.
|
|
#define DEFINE_bool_alias(option__, varname__, dashes__, shortname__, \
|
|
helpstring__, no_helpstring__, invert__) \
|
|
private: \
|
|
struct Struct_##option__ : public options::Struct_var \
|
|
{ \
|
|
Struct_##option__() \
|
|
: option(#option__, dashes__, shortname__, "", helpstring__, \
|
|
NULL, false, this) \
|
|
{ } \
|
|
\
|
|
void \
|
|
parse_to_value(const char*, const char*, \
|
|
Command_line*, General_options* options) \
|
|
{ \
|
|
options->set_##varname__(!invert__); \
|
|
options->set_user_set_##varname__(); \
|
|
} \
|
|
\
|
|
options::One_option option; \
|
|
}; \
|
|
Struct_##option__ option__##_; \
|
|
\
|
|
struct Struct_no_##option__ : public options::Struct_var \
|
|
{ \
|
|
Struct_no_##option__() \
|
|
: option((dashes__ == options::DASH_Z \
|
|
? "no" #option__ \
|
|
: "no-" #option__), \
|
|
dashes__, '\0', "", no_helpstring__, \
|
|
NULL, false, this) \
|
|
{ } \
|
|
\
|
|
void \
|
|
parse_to_value(const char*, const char*, \
|
|
Command_line*, General_options* options) \
|
|
{ \
|
|
options->set_##varname__(invert__); \
|
|
options->set_user_set_##varname__(); \
|
|
} \
|
|
\
|
|
options::One_option option; \
|
|
}; \
|
|
Struct_no_##option__ no_##option__##_initializer_
|
|
|
|
// This is used for non-standard flags. It defines no functions; it
|
|
// just calls General_options::parse_VARNAME whenever the flag is
|
|
// seen. We declare parse_VARNAME as a static member of
|
|
// General_options; you are responsible for defining it there.
|
|
// helparg__ should be NULL iff this special-option is a boolean.
|
|
#define DEFINE_special(varname__, dashes__, shortname__, \
|
|
helpstring__, helparg__) \
|
|
private: \
|
|
void parse_##varname__(const char* option, const char* arg, \
|
|
Command_line* inputs); \
|
|
struct Struct_##varname__ : public options::Struct_special \
|
|
{ \
|
|
Struct_##varname__() \
|
|
: options::Struct_special(#varname__, dashes__, shortname__, \
|
|
&General_options::parse_##varname__, \
|
|
helpstring__, helparg__) \
|
|
{ } \
|
|
}; \
|
|
Struct_##varname__ varname__##_initializer_
|
|
|
|
// An option that takes an optional string argument. If the option is
|
|
// used with no argument, the value will be the default, and
|
|
// user_set_via_option will be true.
|
|
#define DEFINE_optional_string(varname__, dashes__, shortname__, \
|
|
default_value__, \
|
|
helpstring__, helparg__) \
|
|
DEFINE_var(varname__, dashes__, shortname__, default_value__, \
|
|
default_value__, helpstring__, helparg__, true, \
|
|
const char*, const char*, options::parse_optional_string)
|
|
|
|
// A directory to search. For each directory we record whether it is
|
|
// in the sysroot. We need to know this so that, if a linker script
|
|
// is found within the sysroot, we will apply the sysroot to any files
|
|
// named by that script.
|
|
|
|
class Search_directory
|
|
{
|
|
public:
|
|
// We need a default constructor because we put this in a
|
|
// std::vector.
|
|
Search_directory()
|
|
: name_(NULL), put_in_sysroot_(false), is_in_sysroot_(false)
|
|
{ }
|
|
|
|
// This is the usual constructor.
|
|
Search_directory(const char* name, bool put_in_sysroot)
|
|
: name_(name), put_in_sysroot_(put_in_sysroot), is_in_sysroot_(false)
|
|
{
|
|
if (this->name_.empty())
|
|
this->name_ = ".";
|
|
}
|
|
|
|
// This is called if we have a sysroot. The sysroot is prefixed to
|
|
// any entries for which put_in_sysroot_ is true. is_in_sysroot_ is
|
|
// set to true for any enries which are in the sysroot (this will
|
|
// naturally include any entries for which put_in_sysroot_ is true).
|
|
// SYSROOT is the sysroot, CANONICAL_SYSROOT is the result of
|
|
// passing SYSROOT to lrealpath.
|
|
void
|
|
add_sysroot(const char* sysroot, const char* canonical_sysroot);
|
|
|
|
// Get the directory name.
|
|
const std::string&
|
|
name() const
|
|
{ return this->name_; }
|
|
|
|
// Return whether this directory is in the sysroot.
|
|
bool
|
|
is_in_sysroot() const
|
|
{ return this->is_in_sysroot_; }
|
|
|
|
// Return whether this is considered a system directory.
|
|
bool
|
|
is_system_directory() const
|
|
{ return this->put_in_sysroot_ || this->is_in_sysroot_; }
|
|
|
|
private:
|
|
// The directory name.
|
|
std::string name_;
|
|
// True if the sysroot should be added as a prefix for this
|
|
// directory (if there is a sysroot). This is true for system
|
|
// directories that we search by default.
|
|
bool put_in_sysroot_;
|
|
// True if this directory is in the sysroot (if there is a sysroot).
|
|
// This is true if there is a sysroot and either 1) put_in_sysroot_
|
|
// is true, or 2) the directory happens to be in the sysroot based
|
|
// on a pathname comparison.
|
|
bool is_in_sysroot_;
|
|
};
|
|
|
|
class General_options
|
|
{
|
|
private:
|
|
// NOTE: For every option that you add here, also consider if you
|
|
// should add it to Position_dependent_options.
|
|
DEFINE_special(help, options::TWO_DASHES, '\0',
|
|
N_("Report usage information"), NULL);
|
|
DEFINE_special(version, options::TWO_DASHES, 'v',
|
|
N_("Report version information"), NULL);
|
|
DEFINE_special(V, options::EXACTLY_ONE_DASH, '\0',
|
|
N_("Report version and target information"), NULL);
|
|
|
|
// These options are sorted approximately so that for each letter in
|
|
// the alphabet, we show the option whose shortname is that letter
|
|
// (if any) and then every longname that starts with that letter (in
|
|
// alphabetical order). For both, lowercase sorts before uppercase.
|
|
// The -z options come last.
|
|
|
|
DEFINE_bool(add_needed, options::TWO_DASHES, '\0', false,
|
|
N_("Not supported"),
|
|
N_("Do not copy DT_NEEDED tags from shared libraries"));
|
|
|
|
DEFINE_bool_alias(allow_multiple_definition, muldefs, options::TWO_DASHES,
|
|
'\0', N_("Allow multiple definitions of symbols"),
|
|
N_("Do not allow multiple definitions"), false);
|
|
|
|
DEFINE_bool(allow_shlib_undefined, options::TWO_DASHES, '\0', false,
|
|
N_("Allow unresolved references in shared libraries"),
|
|
N_("Do not allow unresolved references in shared libraries"));
|
|
|
|
DEFINE_bool(as_needed, options::TWO_DASHES, '\0', false,
|
|
N_("Only set DT_NEEDED for shared libraries if used"),
|
|
N_("Always DT_NEEDED for shared libraries"));
|
|
|
|
DEFINE_enum(assert, options::ONE_DASH, '\0', NULL,
|
|
N_("Ignored"), N_("[ignored]"),
|
|
{"definitions", "nodefinitions", "nosymbolic", "pure-text"});
|
|
|
|
// This should really be an "enum", but it's too easy for folks to
|
|
// forget to update the list as they add new targets. So we just
|
|
// accept any string. We'll fail later (when the string is parsed),
|
|
// if the target isn't actually supported.
|
|
DEFINE_string(format, options::TWO_DASHES, 'b', "elf",
|
|
N_("Set input format"), ("[elf,binary]"));
|
|
|
|
DEFINE_bool(Bdynamic, options::ONE_DASH, '\0', true,
|
|
N_("-l searches for shared libraries"), NULL);
|
|
DEFINE_bool_alias(Bstatic, Bdynamic, options::ONE_DASH, '\0',
|
|
N_("-l does not search for shared libraries"), NULL,
|
|
true);
|
|
|
|
DEFINE_bool(Bsymbolic, options::ONE_DASH, '\0', false,
|
|
N_("Bind defined symbols locally"), NULL);
|
|
|
|
DEFINE_bool(Bsymbolic_functions, options::ONE_DASH, '\0', false,
|
|
N_("Bind defined function symbols locally"), NULL);
|
|
|
|
DEFINE_optional_string(build_id, options::TWO_DASHES, '\0', "sha1",
|
|
N_("Generate build ID note"),
|
|
N_("[=STYLE]"));
|
|
|
|
DEFINE_bool(check_sections, options::TWO_DASHES, '\0', true,
|
|
N_("Check segment addresses for overlaps (default)"),
|
|
N_("Do not check segment addresses for overlaps"));
|
|
|
|
#ifdef HAVE_ZLIB_H
|
|
DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none",
|
|
N_("Compress .debug_* sections in the output file"),
|
|
("[none,zlib]"),
|
|
{"none", "zlib"});
|
|
#else
|
|
DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none",
|
|
N_("Compress .debug_* sections in the output file"),
|
|
N_("[none]"),
|
|
{"none"});
|
|
#endif
|
|
|
|
DEFINE_bool(copy_dt_needed_entries, options::TWO_DASHES, '\0', false,
|
|
N_("Not supported"),
|
|
N_("Do not copy DT_NEEDED tags from shared libraries"));
|
|
|
|
DEFINE_bool(cref, options::TWO_DASHES, '\0', false,
|
|
N_("Output cross reference table"),
|
|
N_("Do not output cross reference table"));
|
|
|
|
DEFINE_bool(define_common, options::TWO_DASHES, 'd', false,
|
|
N_("Define common symbols"),
|
|
N_("Do not define common symbols"));
|
|
DEFINE_bool(dc, options::ONE_DASH, '\0', false,
|
|
N_("Alias for -d"), NULL);
|
|
DEFINE_bool(dp, options::ONE_DASH, '\0', false,
|
|
N_("Alias for -d"), NULL);
|
|
|
|
DEFINE_string(debug, options::TWO_DASHES, '\0', "",
|
|
N_("Turn on debugging"),
|
|
N_("[all,files,script,task][,...]"));
|
|
|
|
DEFINE_special(defsym, options::TWO_DASHES, '\0',
|
|
N_("Define a symbol"), N_("SYMBOL=EXPRESSION"));
|
|
|
|
DEFINE_optional_string(demangle, options::TWO_DASHES, '\0', NULL,
|
|
N_("Demangle C++ symbols in log messages"),
|
|
N_("[=STYLE]"));
|
|
|
|
DEFINE_bool(no_demangle, options::TWO_DASHES, '\0', false,
|
|
N_("Do not demangle C++ symbols in log messages"),
|
|
NULL);
|
|
|
|
DEFINE_bool(detect_odr_violations, options::TWO_DASHES, '\0', false,
|
|
N_("Try to detect violations of the One Definition Rule"),
|
|
NULL);
|
|
|
|
DEFINE_bool(discard_all, options::TWO_DASHES, 'x', false,
|
|
N_("Delete all local symbols"), NULL);
|
|
DEFINE_bool(discard_locals, options::TWO_DASHES, 'X', false,
|
|
N_("Delete all temporary local symbols"), NULL);
|
|
|
|
DEFINE_bool(dynamic_list_data, options::TWO_DASHES, '\0', false,
|
|
N_("Add data symbols to dynamic symbols"), NULL);
|
|
|
|
DEFINE_bool(dynamic_list_cpp_new, options::TWO_DASHES, '\0', false,
|
|
N_("Add C++ operator new/delete to dynamic symbols"), NULL);
|
|
|
|
DEFINE_bool(dynamic_list_cpp_typeinfo, options::TWO_DASHES, '\0', false,
|
|
N_("Add C++ typeinfo to dynamic symbols"), NULL);
|
|
|
|
DEFINE_special(dynamic_list, options::TWO_DASHES, '\0',
|
|
N_("Read a list of dynamic symbols"), N_("FILE"));
|
|
|
|
DEFINE_string(entry, options::TWO_DASHES, 'e', NULL,
|
|
N_("Set program start address"), N_("ADDRESS"));
|
|
|
|
DEFINE_special(exclude_libs, options::TWO_DASHES, '\0',
|
|
N_("Exclude libraries from automatic export"),
|
|
N_(("lib,lib ...")));
|
|
|
|
DEFINE_bool(export_dynamic, options::TWO_DASHES, 'E', false,
|
|
N_("Export all dynamic symbols"),
|
|
N_("Do not export all dynamic symbols (default)"));
|
|
|
|
DEFINE_bool(eh_frame_hdr, options::TWO_DASHES, '\0', false,
|
|
N_("Create exception frame header"), NULL);
|
|
|
|
DEFINE_bool(fatal_warnings, options::TWO_DASHES, '\0', false,
|
|
N_("Treat warnings as errors"),
|
|
N_("Do not treat warnings as errors"));
|
|
|
|
DEFINE_string(fini, options::ONE_DASH, '\0', "_fini",
|
|
N_("Call SYMBOL at unload-time"), N_("SYMBOL"));
|
|
|
|
DEFINE_bool(fix_cortex_a8, options::TWO_DASHES, '\0', false,
|
|
N_("(ARM only) Fix binaries for Cortex-A8 erratum."),
|
|
N_("(ARM only) Do not fix binaries for Cortex-A8 erratum."));
|
|
|
|
DEFINE_special(fix_v4bx, options::TWO_DASHES, '\0',
|
|
N_("(ARM only) Rewrite BX rn as MOV pc, rn for ARMv4"),
|
|
NULL);
|
|
|
|
DEFINE_special(fix_v4bx_interworking, options::TWO_DASHES, '\0',
|
|
N_("(ARM only) Rewrite BX rn branch to ARMv4 interworking "
|
|
"veneer"),
|
|
NULL);
|
|
|
|
DEFINE_bool(g, options::EXACTLY_ONE_DASH, '\0', false,
|
|
N_("Ignored"), NULL);
|
|
|
|
DEFINE_string(soname, options::ONE_DASH, 'h', NULL,
|
|
N_("Set shared library name"), N_("FILENAME"));
|
|
|
|
DEFINE_bool(i, options::EXACTLY_ONE_DASH, '\0', false,
|
|
N_("Ignored"), NULL);
|
|
|
|
DEFINE_double(hash_bucket_empty_fraction, options::TWO_DASHES, '\0', 0.0,
|
|
N_("Min fraction of empty buckets in dynamic hash"),
|
|
N_("FRACTION"));
|
|
|
|
DEFINE_enum(hash_style, options::TWO_DASHES, '\0', "sysv",
|
|
N_("Dynamic hash style"), N_("[sysv,gnu,both]"),
|
|
{"sysv", "gnu", "both"});
|
|
|
|
DEFINE_string(dynamic_linker, options::TWO_DASHES, 'I', NULL,
|
|
N_("Set dynamic linker path"), N_("PROGRAM"));
|
|
|
|
DEFINE_bool(incremental, options::TWO_DASHES, '\0', false,
|
|
N_("Work in progress; do not use"),
|
|
N_("Do a full build"));
|
|
|
|
DEFINE_special(incremental_changed, options::TWO_DASHES, '\0',
|
|
N_("Assume files changed"), NULL);
|
|
|
|
DEFINE_special(incremental_unchanged, options::TWO_DASHES, '\0',
|
|
N_("Assume files didn't change"), NULL);
|
|
|
|
DEFINE_special(incremental_unknown, options::TWO_DASHES, '\0',
|
|
N_("Use timestamps to check files (default)"), NULL);
|
|
|
|
DEFINE_string(init, options::ONE_DASH, '\0', "_init",
|
|
N_("Call SYMBOL at load-time"), N_("SYMBOL"));
|
|
|
|
DEFINE_special(just_symbols, options::TWO_DASHES, '\0',
|
|
N_("Read only symbol values from FILE"), N_("FILE"));
|
|
|
|
DEFINE_bool(keep_files_mapped, options::TWO_DASHES, '\0',
|
|
sizeof(void*) >= 8,
|
|
N_("Map whole files to memory (default on 64-bit hosts)"),
|
|
N_("Map relevant file parts to memory (default on 32-bit "
|
|
"hosts)"));
|
|
|
|
DEFINE_special(library, options::TWO_DASHES, 'l',
|
|
N_("Search for library LIBNAME"), N_("LIBNAME"));
|
|
|
|
DEFINE_dirlist(library_path, options::TWO_DASHES, 'L',
|
|
N_("Add directory to search path"), N_("DIR"));
|
|
|
|
DEFINE_string(m, options::EXACTLY_ONE_DASH, 'm', "",
|
|
N_("Ignored for compatibility"), N_("EMULATION"));
|
|
|
|
DEFINE_bool(print_map, options::TWO_DASHES, 'M', false,
|
|
N_("Write map file on standard output"), NULL);
|
|
DEFINE_string(Map, options::ONE_DASH, '\0', NULL, N_("Write map file"),
|
|
N_("MAPFILENAME"));
|
|
|
|
DEFINE_bool(nmagic, options::TWO_DASHES, 'n', false,
|
|
N_("Do not page align data"), NULL);
|
|
DEFINE_bool(omagic, options::EXACTLY_TWO_DASHES, 'N', false,
|
|
N_("Do not page align data, do not make text readonly"),
|
|
N_("Page align data, make text readonly"));
|
|
|
|
DEFINE_enable(new_dtags, options::EXACTLY_TWO_DASHES, '\0', false,
|
|
N_("Enable use of DT_RUNPATH and DT_FLAGS"),
|
|
N_("Disable use of DT_RUNPATH and DT_FLAGS"));
|
|
|
|
DEFINE_bool(noinhibit_exec, options::TWO_DASHES, '\0', false,
|
|
N_("Create an output file even if errors occur"), NULL);
|
|
|
|
DEFINE_bool_alias(no_undefined, defs, options::TWO_DASHES, '\0',
|
|
N_("Report undefined symbols (even with --shared)"),
|
|
NULL, false);
|
|
|
|
DEFINE_string(output, options::TWO_DASHES, 'o', "a.out",
|
|
N_("Set output file name"), N_("FILE"));
|
|
|
|
DEFINE_uint(optimize, options::EXACTLY_ONE_DASH, 'O', 0,
|
|
N_("Optimize output file size"), N_("LEVEL"));
|
|
|
|
DEFINE_string(oformat, options::EXACTLY_TWO_DASHES, '\0', "elf",
|
|
N_("Set output format"), N_("[binary]"));
|
|
|
|
DEFINE_bool(pie, options::ONE_DASH, '\0', false,
|
|
N_("Create a position independent executable"), NULL);
|
|
DEFINE_bool_alias(pic_executable, pie, options::TWO_DASHES, '\0',
|
|
N_("Create a position independent executable"), NULL,
|
|
false);
|
|
|
|
#ifdef ENABLE_PLUGINS
|
|
DEFINE_special(plugin, options::TWO_DASHES, '\0',
|
|
N_("Load a plugin library"), N_("PLUGIN"));
|
|
DEFINE_special(plugin_opt, options::TWO_DASHES, '\0',
|
|
N_("Pass an option to the plugin"), N_("OPTION"));
|
|
#endif
|
|
|
|
DEFINE_bool(preread_archive_symbols, options::TWO_DASHES, '\0', false,
|
|
N_("Preread archive symbols when multi-threaded"), NULL);
|
|
|
|
DEFINE_string(print_symbol_counts, options::TWO_DASHES, '\0', NULL,
|
|
N_("Print symbols defined and used for each input"),
|
|
N_("FILENAME"));
|
|
|
|
DEFINE_bool(Qy, options::EXACTLY_ONE_DASH, '\0', false,
|
|
N_("Ignored for SVR4 compatibility"), NULL);
|
|
|
|
DEFINE_bool(emit_relocs, options::TWO_DASHES, 'q', false,
|
|
N_("Generate relocations in output"), NULL);
|
|
|
|
DEFINE_bool(relocatable, options::EXACTLY_ONE_DASH, 'r', false,
|
|
N_("Generate relocatable output"), NULL);
|
|
|
|
DEFINE_bool(relax, options::TWO_DASHES, '\0', false,
|
|
N_("Relax branches on certain targets"), NULL);
|
|
|
|
DEFINE_string(retain_symbols_file, options::TWO_DASHES, '\0', NULL,
|
|
N_("keep only symbols listed in this file"), N_("FILE"));
|
|
|
|
// -R really means -rpath, but can mean --just-symbols for
|
|
// compatibility with GNU ld. -rpath is always -rpath, so we list
|
|
// it separately.
|
|
DEFINE_special(R, options::EXACTLY_ONE_DASH, 'R',
|
|
N_("Add DIR to runtime search path"), N_("DIR"));
|
|
|
|
DEFINE_dirlist(rpath, options::ONE_DASH, '\0',
|
|
N_("Add DIR to runtime search path"), N_("DIR"));
|
|
|
|
DEFINE_dirlist(rpath_link, options::TWO_DASHES, '\0',
|
|
N_("Add DIR to link time shared library search path"),
|
|
N_("DIR"));
|
|
|
|
DEFINE_special(section_start, options::TWO_DASHES, '\0',
|
|
N_("Set address of section"), N_("SECTION=ADDRESS"));
|
|
|
|
DEFINE_optional_string(sort_common, options::TWO_DASHES, '\0', NULL,
|
|
N_("Sort common symbols by alignment"),
|
|
N_("[={ascending,descending}]"));
|
|
|
|
DEFINE_bool(strip_all, options::TWO_DASHES, 's', false,
|
|
N_("Strip all symbols"), NULL);
|
|
DEFINE_bool(strip_debug, options::TWO_DASHES, 'S', false,
|
|
N_("Strip debugging information"), NULL);
|
|
DEFINE_bool(strip_debug_non_line, options::TWO_DASHES, '\0', false,
|
|
N_("Emit only debug line number information"), NULL);
|
|
DEFINE_bool(strip_debug_gdb, options::TWO_DASHES, '\0', false,
|
|
N_("Strip debug symbols that are unused by gdb "
|
|
"(at least versions <= 6.7)"), NULL);
|
|
DEFINE_bool(strip_lto_sections, options::TWO_DASHES, '\0', true,
|
|
N_("Strip LTO intermediate code sections"), NULL);
|
|
|
|
DEFINE_int(stub_group_size, options::TWO_DASHES , '\0', 1,
|
|
N_("(ARM only) The maximum distance from instructions in a group "
|
|
"of sections to their stubs. Negative values mean stubs "
|
|
"are always after the group. 1 means using default size.\n"),
|
|
N_("SIZE"));
|
|
|
|
DEFINE_bool(no_keep_memory, options::TWO_DASHES, '\0', false,
|
|
N_("Use less memory and more disk I/O "
|
|
"(included only for compatibility with GNU ld)"), NULL);
|
|
|
|
DEFINE_bool(shared, options::ONE_DASH, 'G', false,
|
|
N_("Generate shared library"), NULL);
|
|
|
|
DEFINE_bool(Bshareable, options::ONE_DASH, '\0', false,
|
|
N_("Generate shared library"), NULL);
|
|
|
|
DEFINE_uint(split_stack_adjust_size, options::TWO_DASHES, '\0', 0x4000,
|
|
N_("Stack size when -fsplit-stack function calls non-split"),
|
|
N_("SIZE"));
|
|
|
|
// This is not actually special in any way, but I need to give it
|
|
// a non-standard accessor-function name because 'static' is a keyword.
|
|
DEFINE_special(static, options::ONE_DASH, '\0',
|
|
N_("Do not link against shared libraries"), NULL);
|
|
|
|
DEFINE_enum(icf, options::TWO_DASHES, '\0', "none",
|
|
N_("Identical Code Folding. "
|
|
"\'--icf=safe\' Folds ctors, dtors and functions whose"
|
|
" pointers are definitely not taken."),
|
|
("[none,all,safe]"),
|
|
{"none", "all", "safe"});
|
|
|
|
DEFINE_uint(icf_iterations, options::TWO_DASHES , '\0', 0,
|
|
N_("Number of iterations of ICF (default 2)"), N_("COUNT"));
|
|
|
|
DEFINE_bool(print_icf_sections, options::TWO_DASHES, '\0', false,
|
|
N_("List folded identical sections on stderr"),
|
|
N_("Do not list folded identical sections"));
|
|
|
|
DEFINE_set(keep_unique, options::TWO_DASHES, '\0',
|
|
N_("Do not fold this symbol during ICF"), N_("SYMBOL"));
|
|
|
|
DEFINE_bool(gc_sections, options::TWO_DASHES, '\0', false,
|
|
N_("Remove unused sections"),
|
|
N_("Don't remove unused sections (default)"));
|
|
|
|
DEFINE_bool(print_gc_sections, options::TWO_DASHES, '\0', false,
|
|
N_("List removed unused sections on stderr"),
|
|
N_("Do not list removed unused sections"));
|
|
|
|
DEFINE_bool(stats, options::TWO_DASHES, '\0', false,
|
|
N_("Print resource usage statistics"), NULL);
|
|
|
|
DEFINE_string(sysroot, options::TWO_DASHES, '\0', "",
|
|
N_("Set target system root directory"), N_("DIR"));
|
|
|
|
DEFINE_bool(trace, options::TWO_DASHES, 't', false,
|
|
N_("Print the name of each input file"), NULL);
|
|
|
|
DEFINE_special(script, options::TWO_DASHES, 'T',
|
|
N_("Read linker script"), N_("FILE"));
|
|
|
|
DEFINE_bool(threads, options::TWO_DASHES, '\0', false,
|
|
N_("Run the linker multi-threaded"),
|
|
N_("Do not run the linker multi-threaded"));
|
|
DEFINE_uint(thread_count, options::TWO_DASHES, '\0', 0,
|
|
N_("Number of threads to use"), N_("COUNT"));
|
|
DEFINE_uint(thread_count_initial, options::TWO_DASHES, '\0', 0,
|
|
N_("Number of threads to use in initial pass"), N_("COUNT"));
|
|
DEFINE_uint(thread_count_middle, options::TWO_DASHES, '\0', 0,
|
|
N_("Number of threads to use in middle pass"), N_("COUNT"));
|
|
DEFINE_uint(thread_count_final, options::TWO_DASHES, '\0', 0,
|
|
N_("Number of threads to use in final pass"), N_("COUNT"));
|
|
|
|
DEFINE_uint64(Tbss, options::ONE_DASH, '\0', -1U,
|
|
N_("Set the address of the bss segment"), N_("ADDRESS"));
|
|
DEFINE_uint64(Tdata, options::ONE_DASH, '\0', -1U,
|
|
N_("Set the address of the data segment"), N_("ADDRESS"));
|
|
DEFINE_uint64(Ttext, options::ONE_DASH, '\0', -1U,
|
|
N_("Set the address of the text segment"), N_("ADDRESS"));
|
|
|
|
DEFINE_set(undefined, options::TWO_DASHES, 'u',
|
|
N_("Create undefined reference to SYMBOL"), N_("SYMBOL"));
|
|
|
|
DEFINE_bool(verbose, options::TWO_DASHES, '\0', false,
|
|
N_("Synonym for --debug=files"), NULL);
|
|
|
|
DEFINE_special(version_script, options::TWO_DASHES, '\0',
|
|
N_("Read version script"), N_("FILE"));
|
|
|
|
DEFINE_bool(warn_common, options::TWO_DASHES, '\0', false,
|
|
N_("Warn about duplicate common symbols"),
|
|
N_("Do not warn about duplicate common symbols (default)"));
|
|
|
|
DEFINE_bool(warn_constructors, options::TWO_DASHES, '\0', false,
|
|
N_("Ignored"), N_("Ignored"));
|
|
|
|
DEFINE_bool(warn_multiple_gp, options::TWO_DASHES, '\0', false,
|
|
N_("Ignored"), NULL);
|
|
|
|
DEFINE_bool(warn_search_mismatch, options::TWO_DASHES, '\0', true,
|
|
N_("Warn when skipping an incompatible library"),
|
|
N_("Don't warn when skipping an incompatible library"));
|
|
|
|
DEFINE_bool(warn_shared_textrel, options::TWO_DASHES, '\0', false,
|
|
N_("Warn if text segment is not shareable"),
|
|
N_("Do not warn if text segment is not shareable (default)"));
|
|
|
|
DEFINE_bool(warn_unresolved_symbols, options::TWO_DASHES, '\0', false,
|
|
N_("Report unresolved symbols as warnings"),
|
|
NULL);
|
|
DEFINE_bool_alias(error_unresolved_symbols, warn_unresolved_symbols,
|
|
options::TWO_DASHES, '\0',
|
|
N_("Report unresolved symbols as errors"),
|
|
NULL, true);
|
|
|
|
DEFINE_bool(whole_archive, options::TWO_DASHES, '\0', false,
|
|
N_("Include all archive contents"),
|
|
N_("Include only needed archive contents"));
|
|
|
|
DEFINE_set(wrap, options::TWO_DASHES, '\0',
|
|
N_("Use wrapper functions for SYMBOL"), N_("SYMBOL"));
|
|
|
|
DEFINE_set(trace_symbol, options::TWO_DASHES, 'y',
|
|
N_("Trace references to symbol"), N_("SYMBOL"));
|
|
|
|
DEFINE_bool(undefined_version, options::TWO_DASHES, '\0', true,
|
|
N_("Allow unused version in script (default)"),
|
|
N_("Do not allow unused version in script"));
|
|
|
|
DEFINE_string(Y, options::EXACTLY_ONE_DASH, 'Y', "",
|
|
N_("Default search path for Solaris compatibility"),
|
|
N_("PATH"));
|
|
|
|
DEFINE_special(start_group, options::TWO_DASHES, '(',
|
|
N_("Start a library search group"), NULL);
|
|
DEFINE_special(end_group, options::TWO_DASHES, ')',
|
|
N_("End a library search group"), NULL);
|
|
|
|
// The -z options.
|
|
|
|
DEFINE_bool(combreloc, options::DASH_Z, '\0', true,
|
|
N_("Sort dynamic relocs"),
|
|
N_("Do not sort dynamic relocs"));
|
|
DEFINE_uint64(common_page_size, options::DASH_Z, '\0', 0,
|
|
N_("Set common page size to SIZE"), N_("SIZE"));
|
|
DEFINE_bool(defs, options::DASH_Z, '\0', false,
|
|
N_("Report undefined symbols (even with --shared)"),
|
|
NULL);
|
|
DEFINE_bool(execstack, options::DASH_Z, '\0', false,
|
|
N_("Mark output as requiring executable stack"), NULL);
|
|
DEFINE_bool(initfirst, options::DASH_Z, '\0', false,
|
|
N_("Mark DSO to be initialized first at runtime"),
|
|
NULL);
|
|
DEFINE_bool(interpose, options::DASH_Z, '\0', false,
|
|
N_("Mark object to interpose all DSOs but executable"),
|
|
NULL);
|
|
DEFINE_bool(lazy, options::DASH_Z, '\0', false,
|
|
N_("Mark object for lazy runtime binding (default)"),
|
|
NULL);
|
|
DEFINE_bool(loadfltr, options::DASH_Z, '\0', false,
|
|
N_("Mark object requiring immediate process"),
|
|
NULL);
|
|
DEFINE_uint64(max_page_size, options::DASH_Z, '\0', 0,
|
|
N_("Set maximum page size to SIZE"), N_("SIZE"));
|
|
DEFINE_bool(muldefs, options::DASH_Z, '\0', false,
|
|
N_("Allow multiple definitions of symbols"),
|
|
NULL);
|
|
// copyreloc is here in the list because there is only -z
|
|
// nocopyreloc, not -z copyreloc.
|
|
DEFINE_bool(copyreloc, options::DASH_Z, '\0', true,
|
|
NULL,
|
|
N_("Do not create copy relocs"));
|
|
DEFINE_bool(nodefaultlib, options::DASH_Z, '\0', false,
|
|
N_("Mark object not to use default search paths"),
|
|
NULL);
|
|
DEFINE_bool(nodelete, options::DASH_Z, '\0', false,
|
|
N_("Mark DSO non-deletable at runtime"),
|
|
NULL);
|
|
DEFINE_bool(nodlopen, options::DASH_Z, '\0', false,
|
|
N_("Mark DSO not available to dlopen"),
|
|
NULL);
|
|
DEFINE_bool(nodump, options::DASH_Z, '\0', false,
|
|
N_("Mark DSO not available to dldump"),
|
|
NULL);
|
|
DEFINE_bool(noexecstack, options::DASH_Z, '\0', false,
|
|
N_("Mark output as not requiring executable stack"), NULL);
|
|
DEFINE_bool(now, options::DASH_Z, '\0', false,
|
|
N_("Mark object for immediate function binding"),
|
|
NULL);
|
|
DEFINE_bool(origin, options::DASH_Z, '\0', false,
|
|
N_("Mark DSO to indicate that needs immediate $ORIGIN "
|
|
"processing at runtime"), NULL);
|
|
DEFINE_bool(relro, options::DASH_Z, '\0', false,
|
|
N_("Where possible mark variables read-only after relocation"),
|
|
N_("Don't mark variables read-only after relocation"));
|
|
DEFINE_bool(text, options::DASH_Z, '\0', false,
|
|
N_("Do not permit relocations in read-only segments"),
|
|
NULL);
|
|
DEFINE_bool_alias(textoff, text, options::DASH_Z, '\0',
|
|
N_("Permit relocations in read-only segments (default)"),
|
|
NULL, true);
|
|
|
|
public:
|
|
typedef options::Dir_list Dir_list;
|
|
|
|
General_options();
|
|
|
|
// Does post-processing on flags, making sure they all have
|
|
// non-conflicting values. Also converts some flags from their
|
|
// "standard" types (string, etc), to another type (enum, DirList),
|
|
// which can be accessed via a separate method. Dies if it notices
|
|
// any problems.
|
|
void finalize();
|
|
|
|
// True if we printed the version information.
|
|
bool
|
|
printed_version() const
|
|
{ return this->printed_version_; }
|
|
|
|
// The macro defines output() (based on --output), but that's a
|
|
// generic name. Provide this alternative name, which is clearer.
|
|
const char*
|
|
output_file_name() const
|
|
{ return this->output(); }
|
|
|
|
// This is not defined via a flag, but combines flags to say whether
|
|
// the output is position-independent or not.
|
|
bool
|
|
output_is_position_independent() const
|
|
{ return this->shared() || this->pie(); }
|
|
|
|
// Return true if the output is something that can be exec()ed, such
|
|
// as a static executable, or a position-dependent or
|
|
// position-independent executable, but not a dynamic library or an
|
|
// object file.
|
|
bool
|
|
output_is_executable() const
|
|
{ return !this->shared() && !this->relocatable(); }
|
|
|
|
// This would normally be static(), and defined automatically, but
|
|
// since static is a keyword, we need to come up with our own name.
|
|
bool
|
|
is_static() const
|
|
{ return static_; }
|
|
|
|
// In addition to getting the input and output formats as a string
|
|
// (via format() and oformat()), we also give access as an enum.
|
|
enum Object_format
|
|
{
|
|
// Ordinary ELF.
|
|
OBJECT_FORMAT_ELF,
|
|
// Straight binary format.
|
|
OBJECT_FORMAT_BINARY
|
|
};
|
|
|
|
// Convert a string to an Object_format. Gives an error if the
|
|
// string is not recognized.
|
|
static Object_format
|
|
string_to_object_format(const char* arg);
|
|
|
|
// Note: these functions are not very fast.
|
|
Object_format format_enum() const;
|
|
Object_format oformat_enum() const;
|
|
|
|
// Return whether FILENAME is in a system directory.
|
|
bool
|
|
is_in_system_directory(const std::string& name) const;
|
|
|
|
// RETURN whether SYMBOL_NAME should be kept, according to symbols_to_retain_.
|
|
bool
|
|
should_retain_symbol(const char* symbol_name) const
|
|
{
|
|
if (symbols_to_retain_.empty()) // means flag wasn't specified
|
|
return true;
|
|
return symbols_to_retain_.find(symbol_name) != symbols_to_retain_.end();
|
|
}
|
|
|
|
// These are the best way to get access to the execstack state,
|
|
// not execstack() and noexecstack() which are hard to use properly.
|
|
bool
|
|
is_execstack_set() const
|
|
{ return this->execstack_status_ != EXECSTACK_FROM_INPUT; }
|
|
|
|
bool
|
|
is_stack_executable() const
|
|
{ return this->execstack_status_ == EXECSTACK_YES; }
|
|
|
|
bool
|
|
icf_enabled() const
|
|
{ return this->icf_status_ != ICF_NONE; }
|
|
|
|
bool
|
|
icf_safe_folding() const
|
|
{ return this->icf_status_ == ICF_SAFE; }
|
|
|
|
// The --demangle option takes an optional string, and there is also
|
|
// a --no-demangle option. This is the best way to decide whether
|
|
// to demangle or not.
|
|
bool
|
|
do_demangle() const
|
|
{ return this->do_demangle_; }
|
|
|
|
// Returns TRUE if any plugin libraries have been loaded.
|
|
bool
|
|
has_plugins() const
|
|
{ return this->plugins_ != NULL; }
|
|
|
|
// Return a pointer to the plugin manager.
|
|
Plugin_manager*
|
|
plugins() const
|
|
{ return this->plugins_; }
|
|
|
|
// True iff SYMBOL was found in the file specified by dynamic-list.
|
|
bool
|
|
in_dynamic_list(const char* symbol) const
|
|
{ return this->dynamic_list_.version_script_info()->symbol_is_local(symbol); }
|
|
|
|
// Finalize the dynamic list.
|
|
void
|
|
finalize_dynamic_list()
|
|
{ this->dynamic_list_.version_script_info()->finalize(); }
|
|
|
|
// The disposition given by the --incremental-changed,
|
|
// --incremental-unchanged or --incremental-unknown option. The
|
|
// value may change as we proceed parsing the command line flags.
|
|
Incremental_disposition
|
|
incremental_disposition() const
|
|
{ return this->incremental_disposition_; }
|
|
|
|
// Return true if S is the name of a library excluded from automatic
|
|
// symbol export.
|
|
bool
|
|
check_excluded_libs (const std::string &s) const;
|
|
|
|
// If an explicit start address was given for section SECNAME with
|
|
// the --section-start option, return true and set *PADDR to the
|
|
// address. Otherwise return false.
|
|
bool
|
|
section_start(const char* secname, uint64_t* paddr) const;
|
|
|
|
enum Fix_v4bx
|
|
{
|
|
// Leave original instruction.
|
|
FIX_V4BX_NONE,
|
|
// Replace instruction.
|
|
FIX_V4BX_REPLACE,
|
|
// Generate an interworking veneer.
|
|
FIX_V4BX_INTERWORKING
|
|
};
|
|
|
|
Fix_v4bx
|
|
fix_v4bx() const
|
|
{ return (this->fix_v4bx_); }
|
|
|
|
private:
|
|
// Don't copy this structure.
|
|
General_options(const General_options&);
|
|
General_options& operator=(const General_options&);
|
|
|
|
// Whether to mark the stack as executable.
|
|
enum Execstack
|
|
{
|
|
// Not set on command line.
|
|
EXECSTACK_FROM_INPUT,
|
|
// Mark the stack as executable (-z execstack).
|
|
EXECSTACK_YES,
|
|
// Mark the stack as not executable (-z noexecstack).
|
|
EXECSTACK_NO
|
|
};
|
|
|
|
enum Icf_status
|
|
{
|
|
// Do not fold any functions (Default or --icf=none).
|
|
ICF_NONE,
|
|
// All functions are candidates for folding. (--icf=all).
|
|
ICF_ALL,
|
|
// Only ctors and dtors are candidates for folding. (--icf=safe).
|
|
ICF_SAFE
|
|
};
|
|
|
|
void
|
|
set_icf_status(Icf_status value)
|
|
{ this->icf_status_ = value; }
|
|
|
|
void
|
|
set_execstack_status(Execstack value)
|
|
{ this->execstack_status_ = value; }
|
|
|
|
void
|
|
set_do_demangle(bool value)
|
|
{ this->do_demangle_ = value; }
|
|
|
|
void
|
|
set_static(bool value)
|
|
{ static_ = value; }
|
|
|
|
// These are called by finalize() to set up the search-path correctly.
|
|
void
|
|
add_to_library_path_with_sysroot(const char* arg)
|
|
{ this->add_search_directory_to_library_path(Search_directory(arg, true)); }
|
|
|
|
// Apply any sysroot to the directory lists.
|
|
void
|
|
add_sysroot();
|
|
|
|
// Add a plugin and its arguments to the list of plugins.
|
|
void
|
|
add_plugin(const char *filename);
|
|
|
|
// Add a plugin option.
|
|
void
|
|
add_plugin_option(const char* opt);
|
|
|
|
// Whether we printed version information.
|
|
bool printed_version_;
|
|
// Whether to mark the stack as executable.
|
|
Execstack execstack_status_;
|
|
// Whether to do code folding.
|
|
Icf_status icf_status_;
|
|
// Whether to do a static link.
|
|
bool static_;
|
|
// Whether to do demangling.
|
|
bool do_demangle_;
|
|
// List of plugin libraries.
|
|
Plugin_manager* plugins_;
|
|
// The parsed output of --dynamic-list files. For convenience in
|
|
// script.cc, we store this as a Script_options object, even though
|
|
// we only use a single Version_tree from it.
|
|
Script_options dynamic_list_;
|
|
// The disposition given by the --incremental-changed,
|
|
// --incremental-unchanged or --incremental-unknown option. The
|
|
// value may change as we proceed parsing the command line flags.
|
|
Incremental_disposition incremental_disposition_;
|
|
// Whether we have seen one of the options that require incremental
|
|
// build (--incremental-changed, --incremental-unchanged or
|
|
// --incremental-unknown)
|
|
bool implicit_incremental_;
|
|
// Libraries excluded from automatic export, via --exclude-libs.
|
|
Unordered_set<std::string> excluded_libs_;
|
|
// List of symbol-names to keep, via -retain-symbol-info.
|
|
Unordered_set<std::string> symbols_to_retain_;
|
|
// Map from section name to address from --section-start.
|
|
std::map<std::string, uint64_t> section_starts_;
|
|
// Whether to process armv4 bx instruction relocation.
|
|
Fix_v4bx fix_v4bx_;
|
|
};
|
|
|
|
// The position-dependent options. We use this to store the state of
|
|
// the commandline at a particular point in parsing for later
|
|
// reference. For instance, if we see "ld --whole-archive foo.a
|
|
// --no-whole-archive," we want to store the whole-archive option with
|
|
// foo.a, so when the time comes to parse foo.a we know we should do
|
|
// it in whole-archive mode. We could store all of General_options,
|
|
// but that's big, so we just pick the subset of flags that actually
|
|
// change in a position-dependent way.
|
|
|
|
#define DEFINE_posdep(varname__, type__) \
|
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public: \
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type__ \
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varname__() const \
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{ return this->varname__##_; } \
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\
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void \
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set_##varname__(type__ value) \
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{ this->varname__##_ = value; } \
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private: \
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type__ varname__##_
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class Position_dependent_options
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{
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public:
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Position_dependent_options(const General_options& options
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= Position_dependent_options::default_options_)
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{ copy_from_options(options); }
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void copy_from_options(const General_options& options)
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{
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this->set_as_needed(options.as_needed());
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this->set_Bdynamic(options.Bdynamic());
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this->set_format_enum(options.format_enum());
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this->set_whole_archive(options.whole_archive());
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this->set_incremental_disposition(options.incremental_disposition());
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}
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DEFINE_posdep(as_needed, bool);
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DEFINE_posdep(Bdynamic, bool);
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DEFINE_posdep(format_enum, General_options::Object_format);
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DEFINE_posdep(whole_archive, bool);
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DEFINE_posdep(incremental_disposition, Incremental_disposition);
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private:
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// This is a General_options with everything set to its default
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// value. A Position_dependent_options created with no argument
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// will take its values from here.
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static General_options default_options_;
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};
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// A single file or library argument from the command line.
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class Input_file_argument
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{
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public:
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enum Input_file_type
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{
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// A regular file, name used as-is, not searched.
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INPUT_FILE_TYPE_FILE,
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// A library name. When used, "lib" will be prepended and ".so" or
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// ".a" appended to make a filename, and that filename will be searched
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// for using the -L paths.
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INPUT_FILE_TYPE_LIBRARY,
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// A regular file, name used as-is, but searched using the -L paths.
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INPUT_FILE_TYPE_SEARCHED_FILE
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};
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// name: file name or library name
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// type: the type of this input file.
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// extra_search_path: an extra directory to look for the file, prior
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// to checking the normal library search path. If this is "",
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// then no extra directory is added.
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// just_symbols: whether this file only defines symbols.
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// options: The position dependent options at this point in the
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// command line, such as --whole-archive.
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Input_file_argument()
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: name_(), type_(INPUT_FILE_TYPE_FILE), extra_search_path_(""),
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just_symbols_(false), options_()
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{ }
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Input_file_argument(const char* name, Input_file_type type,
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const char* extra_search_path,
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bool just_symbols,
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const Position_dependent_options& options)
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: name_(name), type_(type), extra_search_path_(extra_search_path),
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just_symbols_(just_symbols), options_(options)
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{ }
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// You can also pass in a General_options instance instead of a
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// Position_dependent_options. In that case, we extract the
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// position-independent vars from the General_options and only store
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// those.
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Input_file_argument(const char* name, Input_file_type type,
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const char* extra_search_path,
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bool just_symbols,
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const General_options& options)
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: name_(name), type_(type), extra_search_path_(extra_search_path),
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just_symbols_(just_symbols), options_(options)
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{ }
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const char*
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name() const
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{ return this->name_.c_str(); }
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const Position_dependent_options&
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options() const
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{ return this->options_; }
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bool
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is_lib() const
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{ return type_ == INPUT_FILE_TYPE_LIBRARY; }
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bool
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is_searched_file() const
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{ return type_ == INPUT_FILE_TYPE_SEARCHED_FILE; }
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const char*
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extra_search_path() const
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{
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return (this->extra_search_path_.empty()
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? NULL
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: this->extra_search_path_.c_str());
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}
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// Return whether we should only read symbols from this file.
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bool
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just_symbols() const
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{ return this->just_symbols_; }
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// Return whether this file may require a search using the -L
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// options.
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bool
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may_need_search() const
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{
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return (this->is_lib()
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|| this->is_searched_file()
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|| !this->extra_search_path_.empty());
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}
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private:
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// We use std::string, not const char*, here for convenience when
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// using script files, so that we do not have to preserve the string
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// in that case.
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std::string name_;
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Input_file_type type_;
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std::string extra_search_path_;
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bool just_symbols_;
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Position_dependent_options options_;
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};
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// A file or library, or a group, from the command line.
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class Input_argument
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{
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public:
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// Create a file or library argument.
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explicit Input_argument(Input_file_argument file)
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: is_file_(true), file_(file), group_(NULL)
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{ }
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// Create a group argument.
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explicit Input_argument(Input_file_group* group)
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: is_file_(false), group_(group)
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{ }
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// Return whether this is a file.
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bool
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is_file() const
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{ return this->is_file_; }
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// Return whether this is a group.
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bool
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is_group() const
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{ return !this->is_file_; }
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// Return the information about the file.
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const Input_file_argument&
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file() const
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{
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gold_assert(this->is_file_);
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return this->file_;
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}
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// Return the information about the group.
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const Input_file_group*
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group() const
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{
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gold_assert(!this->is_file_);
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return this->group_;
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}
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Input_file_group*
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group()
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{
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gold_assert(!this->is_file_);
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return this->group_;
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}
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private:
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bool is_file_;
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Input_file_argument file_;
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Input_file_group* group_;
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};
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typedef std::vector<Input_argument> Input_argument_list;
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// A group from the command line. This is a set of arguments within
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// --start-group ... --end-group.
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class Input_file_group
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{
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public:
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typedef Input_argument_list::const_iterator const_iterator;
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Input_file_group()
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: files_()
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{ }
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// Add a file to the end of the group.
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void
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add_file(const Input_file_argument& arg)
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{ this->files_.push_back(Input_argument(arg)); }
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// Iterators to iterate over the group contents.
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const_iterator
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begin() const
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{ return this->files_.begin(); }
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const_iterator
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end() const
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{ return this->files_.end(); }
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private:
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Input_argument_list files_;
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};
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// A list of files from the command line or a script.
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class Input_arguments
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{
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public:
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typedef Input_argument_list::const_iterator const_iterator;
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Input_arguments()
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: input_argument_list_(), in_group_(false)
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{ }
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// Add a file.
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void
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add_file(const Input_file_argument& arg);
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// Start a group (the --start-group option).
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void
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start_group();
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// End a group (the --end-group option).
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void
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end_group();
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// Return whether we are currently in a group.
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bool
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in_group() const
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{ return this->in_group_; }
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// The number of entries in the list.
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int
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size() const
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{ return this->input_argument_list_.size(); }
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// Iterators to iterate over the list of input files.
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const_iterator
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begin() const
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{ return this->input_argument_list_.begin(); }
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const_iterator
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end() const
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{ return this->input_argument_list_.end(); }
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// Return whether the list is empty.
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bool
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empty() const
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{ return this->input_argument_list_.empty(); }
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private:
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Input_argument_list input_argument_list_;
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bool in_group_;
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};
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// All the information read from the command line. These are held in
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// three separate structs: one to hold the options (--foo), one to
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// hold the filenames listed on the commandline, and one to hold
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// linker script information. This third is not a subset of the other
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// two because linker scripts can be specified either as options (via
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// -T) or as a file.
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class Command_line
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{
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public:
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typedef Input_arguments::const_iterator const_iterator;
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Command_line();
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// Process the command line options. This will exit with an
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// appropriate error message if an unrecognized option is seen.
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void
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process(int argc, const char** argv);
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// Process one command-line option. This takes the index of argv to
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// process, and returns the index for the next option. no_more_options
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// is set to true if argv[i] is "--".
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int
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process_one_option(int argc, const char** argv, int i,
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bool* no_more_options);
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// Get the general options.
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const General_options&
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options() const
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{ return this->options_; }
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// Get the position dependent options.
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const Position_dependent_options&
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position_dependent_options() const
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{ return this->position_options_; }
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// Get the linker-script options.
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Script_options&
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script_options()
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{ return this->script_options_; }
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// Finalize the version-script options and return them.
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const Version_script_info&
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version_script();
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// Get the input files.
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Input_arguments&
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inputs()
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{ return this->inputs_; }
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// The number of input files.
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int
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number_of_input_files() const
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{ return this->inputs_.size(); }
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// Iterators to iterate over the list of input files.
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const_iterator
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begin() const
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{ return this->inputs_.begin(); }
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const_iterator
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end() const
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{ return this->inputs_.end(); }
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private:
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Command_line(const Command_line&);
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Command_line& operator=(const Command_line&);
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// This is a dummy class to provide a constructor that runs before
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// the constructor for the General_options. The Pre_options constructor
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// is used as a hook to set the flag enabling the options to register
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// themselves.
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struct Pre_options {
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Pre_options();
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};
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// This must come before options_!
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Pre_options pre_options_;
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General_options options_;
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Position_dependent_options position_options_;
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Script_options script_options_;
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Input_arguments inputs_;
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};
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} // End namespace gold.
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#endif // !defined(GOLD_OPTIONS_H)
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