// options.c -- handle command line options for gold
-// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
#include "gold.h"
+#include <cerrno>
#include <cstdlib>
#include <cstring>
+#include <fstream>
#include <vector>
#include <iostream>
#include <sys/stat.h>
namespace options
{
+// This flag is TRUE if we should register the command-line options as they
+// are constructed. It is set after construction of the options within
+// class Position_dependent_options.
+static bool ready_to_register = false;
+
// This global variable is set up as General_options is constructed.
static std::vector<const One_option*> registered_options;
// These are set up at the same time -- the variables that accept one
// dash, two, or require -z. A single variable may be in more than
-// one of thes data structures.
+// one of these data structures.
typedef Unordered_map<std::string, One_option*> Option_map;
static Option_map* long_options = NULL;
static One_option* short_options[128];
void
One_option::register_option()
{
+ if (!ready_to_register)
+ return;
+
registered_options.push_back(this);
// We can't make long_options a static Option_map because we can't
const int shortname_as_int = static_cast<int>(this->shortname);
gold_assert(shortname_as_int >= 0 && shortname_as_int < 128);
if (this->shortname != '\0')
- short_options[shortname_as_int] = this;
+ {
+ gold_assert(short_options[shortname_as_int] == NULL);
+ short_options[shortname_as_int] = this;
+ }
}
void
printf(" %s", *p);
printf("\n");
+ printf(_("%s: supported emulations:"), gold::program_name);
+ supported_names.clear();
+ gold::supported_emulation_names(&supported_names);
+ for (std::vector<const char*>::const_iterator p = supported_names.begin();
+ p != supported_names.end();
+ ++p)
+ printf(" %s", *p);
+ printf("\n");
+
// REPORT_BUGS_TO is defined in bfd/bfdver.h.
const char* report = REPORT_BUGS_TO;
if (*report != '\0')
{
char* endptr;
*retval = strtol(arg, &endptr, 0);
- if (*endptr != '\0' || retval < 0)
+ if (*endptr != '\0' || *retval < 0)
+ gold_fatal(_("%s: invalid option value (expected an integer): %s"),
+ option_name, arg);
+}
+
+void
+parse_int(const char* option_name, const char* arg, int* retval)
+{
+ char* endptr;
+ *retval = strtol(arg, &endptr, 0);
+ if (*endptr != '\0')
gold_fatal(_("%s: invalid option value (expected an integer): %s"),
option_name, arg);
}
void
-parse_uint64(const char* option_name, const char* arg, uint64_t *retval)
+parse_uint64(const char* option_name, const char* arg, uint64_t* retval)
{
char* endptr;
*retval = strtoull(arg, &endptr, 0);
}
void
+parse_percent(const char* option_name, const char* arg, double* retval)
+{
+ char* endptr;
+ *retval = strtod(arg, &endptr) / 100.0;
+ if (*endptr != '\0')
+ gold_fatal(_("%s: invalid option value "
+ "(expected a floating point number): %s"),
+ option_name, arg);
+}
+
+void
parse_string(const char* option_name, const char* arg, const char** retval)
{
if (*arg == '\0')
void
General_options::parse_version(const char* opt, const char*, Command_line*)
{
- gold::print_version(opt[0] == '-' && opt[1] == 'v');
- ::exit(EXIT_SUCCESS);
+ bool print_short = (opt[0] == '-' && opt[1] == 'v');
+ gold::print_version(print_short);
+ this->printed_version_ = true;
+ if (!print_short)
+ ::exit(EXIT_SUCCESS);
}
void
General_options::parse_V(const char*, const char*, Command_line*)
{
gold::print_version(true);
+ this->printed_version_ = true;
+
printf(_(" Supported targets:\n"));
std::vector<const char*> supported_names;
gold::supported_target_names(&supported_names);
p != supported_names.end();
++p)
printf(" %s\n", *p);
+
+ printf(_(" Supported emulations:\n"));
+ supported_names.clear();
+ gold::supported_emulation_names(&supported_names);
+ for (std::vector<const char*>::const_iterator p = supported_names.begin();
+ p != supported_names.end();
+ ++p)
+ printf(" %s\n", *p);
}
void
}
void
+General_options::parse_incremental(const char*, const char*,
+ Command_line*)
+{
+ this->incremental_mode_ = INCREMENTAL_AUTO;
+}
+
+void
+General_options::parse_no_incremental(const char*, const char*,
+ Command_line*)
+{
+ this->incremental_mode_ = INCREMENTAL_OFF;
+}
+
+void
+General_options::parse_incremental_full(const char*, const char*,
+ Command_line*)
+{
+ this->incremental_mode_ = INCREMENTAL_FULL;
+}
+
+void
+General_options::parse_incremental_update(const char*, const char*,
+ Command_line*)
+{
+ this->incremental_mode_ = INCREMENTAL_UPDATE;
+}
+
+void
General_options::parse_incremental_changed(const char*, const char*,
Command_line*)
{
}
void
+General_options::parse_incremental_startup_unchanged(const char*, const char*,
+ Command_line*)
+{
+ this->implicit_incremental_ = true;
+ this->incremental_startup_disposition_ = INCREMENTAL_UNCHANGED;
+}
+
+void
General_options::parse_library(const char*, const char* arg,
Command_line* cmdline)
{
- Input_file_argument file(arg, true, "", false, *this);
+ Input_file_argument::Input_file_type type;
+ const char* name;
+ if (arg[0] == ':')
+ {
+ type = Input_file_argument::INPUT_FILE_TYPE_SEARCHED_FILE;
+ name = arg + 1;
+ }
+ else
+ {
+ type = Input_file_argument::INPUT_FILE_TYPE_LIBRARY;
+ name = arg;
+ }
+ Input_file_argument file(name, type, "", false, *this);
cmdline->inputs().add_file(file);
}
General_options::parse_just_symbols(const char*, const char* arg,
Command_line* cmdline)
{
- Input_file_argument file(arg, false, "", true, *this);
+ Input_file_argument file(arg, Input_file_argument::INPUT_FILE_TYPE_FILE,
+ "", true, *this);
cmdline->inputs().add_file(file);
}
+// Handle --section-start.
+
+void
+General_options::parse_section_start(const char*, const char* arg,
+ Command_line*)
+{
+ const char* eq = strchr(arg, '=');
+ if (eq == NULL)
+ {
+ gold_error(_("invalid argument to --section-start; "
+ "must be SECTION=ADDRESS"));
+ return;
+ }
+
+ std::string section_name(arg, eq - arg);
+
+ ++eq;
+ const char* val_start = eq;
+ if (eq[0] == '0' && (eq[1] == 'x' || eq[1] == 'X'))
+ eq += 2;
+ if (*eq == '\0')
+ {
+ gold_error(_("--section-start address missing"));
+ return;
+ }
+ uint64_t addr = 0;
+ hex_init();
+ for (; *eq != '\0'; ++eq)
+ {
+ if (!hex_p(*eq))
+ {
+ gold_error(_("--section-start argument %s is not a valid hex number"),
+ val_start);
+ return;
+ }
+ addr <<= 4;
+ addr += hex_value(*eq);
+ }
+
+ this->section_starts_[section_name] = addr;
+}
+
+// Look up a --section-start value.
+
+bool
+General_options::section_start(const char* secname, uint64_t* paddr) const
+{
+ if (this->section_starts_.empty())
+ return false;
+ std::map<std::string, uint64_t>::const_iterator p =
+ this->section_starts_.find(secname);
+ if (p == this->section_starts_.end())
+ return false;
+ *paddr = p->second;
+ return true;
+}
+
void
General_options::parse_static(const char*, const char*, Command_line*)
{
cmdline->inputs().end_group();
}
-} // End namespace gold.
-
-namespace
+void
+General_options::parse_start_lib(const char*, const char*,
+ Command_line* cmdline)
{
+ cmdline->inputs().start_lib(cmdline->position_dependent_options());
+}
void
-usage()
+General_options::parse_end_lib(const char*, const char*,
+ Command_line* cmdline)
{
- fprintf(stderr,
- _("%s: use the --help option for usage information\n"),
- gold::program_name);
- ::exit(EXIT_FAILURE);
+ cmdline->inputs().end_lib();
}
+// The function add_excluded_libs() in ld/ldlang.c of GNU ld breaks up a list
+// of names separated by commas or colons and puts them in a linked list.
+// We implement the same parsing of names here but store names in an unordered
+// map to speed up searching of names.
+
void
-usage(const char* msg, const char *opt)
+General_options::parse_exclude_libs(const char*, const char* arg,
+ Command_line*)
{
- fprintf(stderr,
- _("%s: %s: %s\n"),
- gold::program_name, opt, msg);
- usage();
+ const char* p = arg;
+
+ while (*p != '\0')
+ {
+ size_t length = strcspn(p, ",:");
+ this->excluded_libs_.insert(std::string(p, length));
+ p += (p[length] ? length + 1 : length);
+ }
+}
+
+// The checking logic is based on the function check_excluded_libs() in
+// ld/ldlang.c of GNU ld but our implementation is different because we use
+// an unordered map instead of a linked list, which is what GNU ld uses. GNU
+// ld searches sequentially in the excluded libs list. For a given archive,
+// a match is found if the archive's name matches exactly one of the list
+// entry or if the archive's name is of the form FOO.a and FOO matches exactly
+// one of the list entry. An entry "ALL" in the list is considered as a
+// wild-card and matches any given name.
+
+bool
+General_options::check_excluded_libs(const std::string &name) const
+{
+ Unordered_set<std::string>::const_iterator p;
+
+ // Exit early for the most common case.
+ if (excluded_libs_.empty())
+ return false;
+
+ // If we see "ALL", all archives are excluded from automatic export.
+ p = excluded_libs_.find(std::string("ALL"));
+ if (p != excluded_libs_.end())
+ return true;
+
+ // First strip off any directories in name.
+ const char* basename = lbasename(name.c_str());
+
+ // Try finding an exact match.
+ p = excluded_libs_.find(std::string(basename));
+ if (p != excluded_libs_.end())
+ return true;
+
+ // Try matching NAME without ".a" at the end.
+ size_t length = strlen(basename);
+ if ((length >= 2)
+ && (basename[length - 2] == '.')
+ && (basename[length - 1] == 'a'))
+ {
+ p = excluded_libs_.find(std::string(basename, length - 2));
+ if (p != excluded_libs_.end())
+ return true;
+ }
+
+ return false;
}
// Recognize input and output target names. The GNU linker accepts
// "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex",
// "binary", "ihex".
-gold::General_options::Object_format
-string_to_object_format(const char* arg)
+General_options::Object_format
+General_options::string_to_object_format(const char* arg)
{
- if (strncmp(arg, "elf", 3) == 0)
+ if (strncmp(arg, "elf", 3) == 0 || strcmp(arg, "default") == 0)
return gold::General_options::OBJECT_FORMAT_ELF;
else if (strcmp(arg, "binary") == 0)
return gold::General_options::OBJECT_FORMAT_BINARY;
}
}
+void
+General_options::parse_fix_v4bx(const char*, const char*,
+ Command_line*)
+{
+ this->fix_v4bx_ = FIX_V4BX_REPLACE;
+}
+
+void
+General_options::parse_fix_v4bx_interworking(const char*, const char*,
+ Command_line*)
+{
+ this->fix_v4bx_ = FIX_V4BX_INTERWORKING;
+}
+
+void
+General_options::parse_EB(const char*, const char*, Command_line*)
+{
+ this->endianness_ = ENDIANNESS_BIG;
+}
+
+void
+General_options::parse_EL(const char*, const char*, Command_line*)
+{
+ this->endianness_ = ENDIANNESS_LITTLE;
+}
+
+} // End namespace gold.
+
+namespace
+{
+
+void
+usage()
+{
+ fprintf(stderr,
+ _("%s: use the --help option for usage information\n"),
+ gold::program_name);
+ ::exit(EXIT_FAILURE);
+}
+
+void
+usage(const char* msg, const char* opt)
+{
+ fprintf(stderr,
+ _("%s: %s: %s\n"),
+ gold::program_name, opt, msg);
+ usage();
+}
+
// If the default sysroot is relocatable, try relocating it based on
// the prefix FROM.
// We handle -z as a special case.
static gold::options::One_option dash_z("", gold::options::DASH_Z,
- 'z', "", "-z", "Z-OPTION", false,
+ 'z', "", NULL, "Z-OPTION", false,
NULL);
gold::options::One_option* retval = NULL;
if (this_argv[pos_in_argv_i] == 'z')
{
General_options::General_options()
- : execstack_status_(General_options::EXECSTACK_FROM_INPUT), static_(false),
- do_demangle_(false), plugins_(),
- incremental_disposition_(INCREMENTAL_CHECK), implicit_incremental_(false)
+ : printed_version_(false),
+ execstack_status_(EXECSTACK_FROM_INPUT),
+ icf_status_(ICF_NONE),
+ static_(false),
+ do_demangle_(false),
+ plugins_(NULL),
+ dynamic_list_(),
+ incremental_mode_(INCREMENTAL_OFF),
+ incremental_disposition_(INCREMENTAL_STARTUP),
+ incremental_startup_disposition_(INCREMENTAL_CHECK),
+ implicit_incremental_(false),
+ excluded_libs_(),
+ symbols_to_retain_(),
+ section_starts_(),
+ fix_v4bx_(FIX_V4BX_NONE),
+ endianness_(ENDIANNESS_NOT_SET)
{
+ // Turn off option registration once construction is complete.
+ gold::options::ready_to_register = false;
}
General_options::Object_format
General_options::format_enum() const
{
- return string_to_object_format(this->format());
+ return General_options::string_to_object_format(this->format());
}
General_options::Object_format
General_options::oformat_enum() const
{
- return string_to_object_format(this->oformat());
+ return General_options::string_to_object_format(this->oformat());
}
// Add the sysroot, if any, to the search paths.
else if (this->noexecstack())
this->set_execstack_status(EXECSTACK_NO);
+ // icf_status_ is a three-state variable; update it based on the
+ // value of this->icf().
+ if (strcmp(this->icf(), "none") == 0)
+ this->set_icf_status(ICF_NONE);
+ else if (strcmp(this->icf(), "safe") == 0)
+ this->set_icf_status(ICF_SAFE);
+ else
+ this->set_icf_status(ICF_ALL);
+
// Handle the optional argument for --demangle.
if (this->user_set_demangle())
{
program_name);
#endif
+ std::string libpath;
if (this->user_set_Y())
{
- std::string s = this->Y();
- if (s.compare(0, 2, "P,") == 0)
- s.erase(0, 2);
+ libpath = this->Y();
+ if (libpath.compare(0, 2, "P,") == 0)
+ libpath.erase(0, 2);
+ }
+ else if (!this->nostdlib())
+ {
+#ifndef NATIVE_LINKER
+#define NATIVE_LINKER 0
+#endif
+ const char* p = LIB_PATH;
+ if (strcmp(p, "::DEFAULT::") != 0)
+ libpath = p;
+ else if (NATIVE_LINKER
+ || this->user_set_sysroot()
+ || *TARGET_SYSTEM_ROOT != '\0')
+ {
+ this->add_to_library_path_with_sysroot("/lib");
+ this->add_to_library_path_with_sysroot("/usr/lib");
+ }
+ else
+ this->add_to_library_path_with_sysroot(TOOLLIBDIR);
+ }
+ if (!libpath.empty())
+ {
size_t pos = 0;
size_t next_pos;
do
{
- next_pos = s.find(':', pos);
+ next_pos = libpath.find(':', pos);
size_t len = (next_pos == std::string::npos
? next_pos
: next_pos - pos);
if (len != 0)
- this->add_to_library_path_with_sysroot(s.substr(pos, len).c_str());
+ this->add_to_library_path_with_sysroot(libpath.substr(pos, len));
pos = next_pos + 1;
}
while (next_pos != std::string::npos);
}
- else
+
+ // Parse the contents of -retain-symbols-file into a set.
+ if (this->retain_symbols_file())
{
- // Even if they don't specify it, we add -L /lib and -L /usr/lib.
- // FIXME: We should only do this when configured in native mode.
- this->add_to_library_path_with_sysroot("/lib");
- this->add_to_library_path_with_sysroot("/usr/lib");
+ std::ifstream in;
+ in.open(this->retain_symbols_file());
+ if (!in)
+ gold_fatal(_("unable to open -retain-symbols-file file %s: %s"),
+ this->retain_symbols_file(), strerror(errno));
+ std::string line;
+ std::getline(in, line); // this chops off the trailing \n, if any
+ while (in)
+ {
+ if (!line.empty() && line[line.length() - 1] == '\r') // Windows
+ line.resize(line.length() - 1);
+ this->symbols_to_retain_.insert(line);
+ std::getline(in, line);
+ }
}
+ // -Bgroup implies --unresolved-symbols=report-all.
+ if (this->Bgroup() && !this->user_set_unresolved_symbols())
+ this->set_unresolved_symbols("report-all");
+
+ // -shared implies --allow-shlib-undefined. Currently
+ // ---allow-shlib-undefined controls warnings issued based on the
+ // -symbol table. --unresolved-symbols controls warnings issued
+ // -based on relocations.
if (this->shared() && !this->user_set_allow_shlib_undefined())
this->set_allow_shlib_undefined(true);
// Now that we've normalized the options, check for contradictory ones.
if (this->shared() && this->is_static())
gold_fatal(_("-shared and -static are incompatible"));
+ if (this->shared() && this->pie())
+ gold_fatal(_("-shared and -pie are incompatible"));
+ if (this->pie() && this->is_static())
+ gold_fatal(_("-pie and -static are incompatible"));
if (this->shared() && this->relocatable())
gold_fatal(_("-shared and -r are incompatible"));
+ if (this->pie() && this->relocatable())
+ gold_fatal(_("-pie and -r are incompatible"));
+
+ if (!this->shared())
+ {
+ if (this->filter() != NULL)
+ gold_fatal(_("-F/--filter may not used without -shared"));
+ if (this->any_auxiliary())
+ gold_fatal(_("-f/--auxiliary may not be used without -shared"));
+ }
+
+ // TODO: implement support for -retain-symbols-file with -r, if needed.
+ if (this->relocatable() && this->retain_symbols_file())
+ gold_fatal(_("-retain-symbols-file does not yet work with -r"));
if (this->oformat_enum() != General_options::OBJECT_FORMAT_ELF
- && (this->shared() || this->relocatable()))
- gold_fatal(_("binary output format not compatible with -shared or -r"));
+ && (this->shared()
+ || this->pie()
+ || this->relocatable()))
+ gold_fatal(_("binary output format not compatible "
+ "with -shared or -pie or -r"));
if (this->user_set_hash_bucket_empty_fraction()
&& (this->hash_bucket_empty_fraction() < 0.0
"[0.0, 1.0)"),
this->hash_bucket_empty_fraction());
- if (this->implicit_incremental_ && !this->incremental())
+ if (this->implicit_incremental_ && this->incremental_mode_ == INCREMENTAL_OFF)
gold_fatal(_("Options --incremental-changed, --incremental-unchanged, "
"--incremental-unknown require the use of --incremental"));
+ // Check for options that are not compatible with incremental linking.
+ // Where an option can be disabled without seriously changing the semantics
+ // of the link, we turn the option off; otherwise, we issue a fatal error.
+
+ if (this->incremental_mode_ != INCREMENTAL_OFF)
+ {
+ if (this->relocatable())
+ gold_fatal(_("incremental linking is not compatible with -r"));
+ if (this->emit_relocs())
+ gold_fatal(_("incremental linking is not compatible with "
+ "--emit-relocs"));
+ if (this->has_plugins())
+ gold_fatal(_("incremental linking is not compatible with --plugin"));
+ if (this->gc_sections())
+ {
+ gold_warning(_("ignoring --gc-sections for an incremental link"));
+ this->set_gc_sections(false);
+ }
+ if (this->icf_enabled())
+ {
+ gold_warning(_("ignoring --icf for an incremental link"));
+ this->set_icf_status(ICF_NONE);
+ }
+ if (strcmp(this->compress_debug_sections(), "none") != 0)
+ {
+ gold_warning(_("ignoring --compress-debug-sections for an "
+ "incremental link"));
+ this->set_compress_debug_sections("none");
+ }
+ }
+
// FIXME: we can/should be doing a lot more sanity checking here.
}
// Add a file to the list.
-void
-Input_arguments::add_file(const Input_file_argument& file)
+Input_argument&
+Input_arguments::add_file(Input_file_argument& file)
{
- if (!this->in_group_)
- this->input_argument_list_.push_back(Input_argument(file));
- else
+ file.set_arg_serial(++this->file_count_);
+ if (this->in_group_)
{
gold_assert(!this->input_argument_list_.empty());
gold_assert(this->input_argument_list_.back().is_group());
- this->input_argument_list_.back().group()->add_file(file);
+ return this->input_argument_list_.back().group()->add_file(file);
}
+ if (this->in_lib_)
+ {
+ gold_assert(!this->input_argument_list_.empty());
+ gold_assert(this->input_argument_list_.back().is_lib());
+ return this->input_argument_list_.back().lib()->add_file(file);
+ }
+ this->input_argument_list_.push_back(Input_argument(file));
+ return this->input_argument_list_.back();
}
// Start a group.
{
if (this->in_group_)
gold_fatal(_("May not nest groups"));
+ if (this->in_lib_)
+ gold_fatal(_("may not nest groups in libraries"));
Input_file_group* group = new Input_file_group();
this->input_argument_list_.push_back(Input_argument(group));
this->in_group_ = true;
this->in_group_ = false;
}
+// Start a lib.
+
+void
+Input_arguments::start_lib(const Position_dependent_options& options)
+{
+ if (this->in_lib_)
+ gold_fatal(_("may not nest libraries"));
+ if (this->in_group_)
+ gold_fatal(_("may not nest libraries in groups"));
+ Input_file_lib* lib = new Input_file_lib(options);
+ this->input_argument_list_.push_back(Input_argument(lib));
+ this->in_lib_ = true;
+}
+
+// End a lib.
+
+void
+Input_arguments::end_lib()
+{
+ if (!this->in_lib_)
+ gold_fatal(_("lib end without lib start"));
+ this->in_lib_ = false;
+}
+
// Command_line options.
Command_line::Command_line()
{
}
+// Pre_options is the hook that sets the ready_to_register flag.
+
+Command_line::Pre_options::Pre_options()
+{
+ gold::options::ready_to_register = true;
+}
+
// Process the command line options. For process_one_option, i is the
// index of argv to process next, and must be an option (that is,
// start with a dash). The return value is the index of the next
this->position_options_.copy_from_options(this->options());
if (no_more_options || argv[i][0] != '-')
{
- Input_file_argument file(argv[i], false, "", false,
- this->position_options_);
+ Input_file_argument file(argv[i],
+ Input_file_argument::INPUT_FILE_TYPE_FILE,
+ "", false, this->position_options_);
this->inputs_.add_file(file);
++i;
}
this->options_.finalize();
}
+// Finalize the version script options and return them.
+
+const Version_script_info&
+Command_line::version_script()
+{
+ this->options_.finalize_dynamic_list();
+ Version_script_info* vsi = this->script_options_.version_script_info();
+ vsi->finalize();
+ return *vsi;
+}
+
} // End namespace gold.
projects / external / binutils.git / blobdiff