diff options
Diffstat (limited to 'gold/options.h')
| -rw-r--r-- | gold/options.h | 1238 |
1 files changed, 588 insertions, 650 deletions
diff --git a/gold/options.h b/gold/options.h index 1b3f39686e2..30ffb8c5468 100644 --- a/gold/options.h +++ b/gold/options.h @@ -20,14 +20,18 @@ // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, // MA 02110-1301, USA. -// Command_line -// Holds everything we get from the command line. // General_options (from Command_line::options()) -// Options which are not position dependent. +// All the options (a.k.a. command-line flags) // Input_argument (from Command_line::inputs()) // The list of input files, including -l options. -// Position_dependent_options (from Input_argument::options()) -// Position dependent options which apply to this argument. +// Command_line +// Everything we get from the command line -- the General_options +// plus the Input_arguments. +// +// There are also some smaller classes, such as +// Position_dependent_options which hold a subset of General_options +// that change as options are parsed (as opposed to the usual behavior +// of the last instance of that option specified on the commandline wins). #ifndef GOLD_OPTIONS_H #define GOLD_OPTIONS_H @@ -44,19 +48,297 @@ namespace gold { class Command_line; +class General_options; +class Search_directory; class Input_file_group; class Position_dependent_options; class Target; +// The nested namespace is to contain all the global variables and +// structs that need to be defined in the .h file, but do not need to +// be used outside this class. namespace options { +typedef std::vector<Search_directory> Dir_list; + +// These routines convert from a string option to various types. +// Each gives a fatal error if it cannot parse the argument. + +extern void +parse_bool(const char* option_name, const char* arg, bool* retval); + +extern void +parse_uint(const char* option_name, const char* arg, int* retval); + +extern void +parse_uint64(const char* option_name, const char* arg, uint64_t *retval); + +extern void +parse_string(const char* option_name, const char* arg, const char** retval); + +extern void +parse_dirlist(const char* option_name, const char* arg, Dir_list* retval); + +extern void +parse_choices(const char* option_name, const char* arg, const char** retval, + const char* choices[], int num_choices); + +struct Struct_var; + +// Most options have both a shortname (one letter) and a longname. +// This enum controls how many dashes are expected for longname access +// -- shortnames always use one dash. Most longnames will accept +// either one dash or two; the only difference between ONE_DASH and +// TWO_DASHES is how we print the option in --help. However, some +// longnames require two dashes, and some require only one. The +// special value DASH_Z means that the option is preceded by "-z". +enum Dashes +{ + ONE_DASH, TWO_DASHES, EXACTLY_ONE_DASH, EXACTLY_TWO_DASHES, DASH_Z +}; + +// LONGNAME is the long-name of the option with dashes converted to +// underscores, or else the short-name if the option has no long-name. +// It is never the empty string. +// DASHES is an instance of the Dashes enum: ONE_DASH, TWO_DASHES, etc. +// SHORTNAME is the short-name of the option, as a char, or '\0' if the +// option has no short-name. If the option has no long-name, you +// should specify the short-name in *both* VARNAME and here. +// DEFAULT_VALUE is the value of the option if not specified on the +// commandline, as a string. +// HELPSTRING is the descriptive text used with the option via --help +// HELPARG is how you define the argument to the option. +// --help output is "-shortname HELPARG, --longname HELPARG: HELPSTRING" +// HELPARG should be NULL iff the option is a bool and takes no arg. +// READER provides parse_to_value, which is a function that will convert +// a char* argument into the proper type and store it in some variable. +// A One_option struct initializes itself with the global list of options +// at constructor time, so be careful making one of these. +struct One_option +{ + std::string longname; + Dashes dashes; + char shortname; + const char* default_value; + const char* helpstring; + const char* helparg; + Struct_var* reader; + + One_option(const char* ln, Dashes d, char sn, const char* dv, + const char* hs, const char* ha, Struct_var* r) + : longname(ln), dashes(d), shortname(sn), default_value(dv ? dv : ""), + helpstring(hs), helparg(ha), reader(r) + { + // In longname, we convert all underscores to dashes, since GNU + // style uses dashes in option names. longname is likely to have + // underscores in it because it's also used to declare a C++ + // function. + const char* pos = strchr(this->longname.c_str(), '_'); + for (; pos; pos = strchr(pos, '_')) + this->longname[pos - this->longname.c_str()] = '-'; + + // We only register ourselves if our helpstring is not NULL. This + // is to support the "no-VAR" boolean variables, which we + // conditionally turn on by defining "no-VAR" help text. + if (this->helpstring) + this->register_option(); + } + + // This option takes an argument iff helparg is not NULL. + bool + takes_argument() const + { return this->helparg != NULL; } + + // Register this option with the global list of options. + void + register_option(); + + // Print this option to stdout (used with --help). + void + print() const; +}; + +// All options have a Struct_##varname that inherits from this and +// actually implements parse_to_value for that option. +struct Struct_var +{ + // OPTION: the name of the option as specified on the commandline, + // including leading dashes, and any text following the option: + // "-O", "--defsym=mysym=0x1000", etc. + // ARG: the arg associated with this option, or NULL if the option + // takes no argument: "2", "mysym=0x1000", etc. + // CMDLINE: the global Command_line object. Used by DEFINE_special. + // OPTIONS: the global General_options object. Used by DEFINE_special. + virtual void + parse_to_value(const char* option, const char* arg, + Command_line* cmdline, General_options* options) = 0; + virtual + ~Struct_var() // To make gcc happy. + { } +}; -class Command_line_options; -struct One_option; -struct One_z_option; -struct One_debug_option; +// This is for "special" options that aren't of any predefined type. +struct Struct_special : public Struct_var +{ + // If you change this, change the parse-fn in DEFINE_special as well. + typedef void (General_options::*Parse_function)(const char*, const char*, + Command_line*); + Struct_special(const char* varname, Dashes dashes, char shortname, + Parse_function parse_function, + const char* helpstring, const char* helparg) + : option(varname, dashes, shortname, "", helpstring, helparg, this), + parse(parse_function) + { } + + void parse_to_value(const char* option, const char* arg, + Command_line* cmdline, General_options* options) + { (options->*(this->parse))(option, arg, cmdline); } + + One_option option; + Parse_function parse; +}; + +} // End namespace options. + + +// These are helper macros use by DEFINE_uint64/etc below. +// This macro is used inside the General_options_ class, so defines +// var() and set_var() as General_options methods. Arguments as are +// for the constructor for One_option. param_type__ is the same as +// type__ for built-in types, and "const type__ &" otherwise. +#define DEFINE_var(varname__, dashes__, shortname__, default_value__, \ + default_value_as_string__, helpstring__, helparg__, \ + type__, param_type__, parse_fn__) \ + public: \ + param_type__ \ + varname__() const \ + { return this->varname__##_.value; } \ + \ + bool \ + user_set_##varname__() const \ + { return this->varname__##_.user_set_via_option; } \ + \ + private: \ + struct Struct_##varname__ : public options::Struct_var \ + { \ + Struct_##varname__() \ + : option(#varname__, dashes__, shortname__, default_value_as_string__, \ + helpstring__, helparg__, this), \ + user_set_via_option(false), value(default_value__) \ + { } \ + \ + void \ + parse_to_value(const char* option_name, const char* arg, \ + Command_line*, General_options*) \ + { \ + parse_fn__(option_name, arg, &this->value); \ + this->user_set_via_option = true; \ + } \ + \ + options::One_option option; \ + bool user_set_via_option; \ + type__ value; \ + }; \ + Struct_##varname__ varname__##_; \ + void \ + set_##varname__(param_type__ value) \ + { this->varname__##_.value = value; } + +// These macros allow for easy addition of a new commandline option. + +// If no_helpstring__ is not NULL, then in addition to creating +// VARNAME, we also create an option called no-VARNAME. +#define DEFINE_bool(varname__, dashes__, shortname__, default_value__, \ + helpstring__, no_helpstring__) \ + DEFINE_var(varname__, dashes__, shortname__, default_value__, \ + default_value__ ? "true" : "false", helpstring__, NULL, \ + bool, bool, options::parse_bool) \ + struct Struct_no_##varname__ : public options::Struct_var \ + { \ + Struct_no_##varname__() : option("no-" #varname__, dashes__, '\0', \ + default_value__ ? "false" : "true", \ + no_helpstring__, NULL, this) \ + { } \ + \ + void \ + parse_to_value(const char*, const char*, \ + Command_line*, General_options* options) \ + { options->set_##varname__(false); } \ + \ + options::One_option option; \ + }; \ + Struct_no_##varname__ no_##varname__##_initializer_ + +#define DEFINE_uint(varname__, dashes__, shortname__, default_value__, \ + helpstring__, helparg__) \ + DEFINE_var(varname__, dashes__, shortname__, default_value__, \ + #default_value__, helpstring__, helparg__, \ + int, int, options::parse_uint) + +#define DEFINE_uint64(varname__, dashes__, shortname__, default_value__, \ + helpstring__, helparg__) \ + DEFINE_var(varname__, dashes__, shortname__, default_value__, \ + #default_value__, helpstring__, helparg__, \ + uint64_t, uint64_t, options::parse_uint64) + +#define DEFINE_string(varname__, dashes__, shortname__, default_value__, \ + helpstring__, helparg__) \ + DEFINE_var(varname__, dashes__, shortname__, default_value__, \ + default_value__, helpstring__, helparg__, \ + const char*, const char*, options::parse_string) + +// This is like DEFINE_string, but we convert each occurrence to a +// Search_directory and store it in a vector. Thus we also have the +// add_to_VARNAME() method, to append to the vector. +#define DEFINE_dirlist(varname__, dashes__, shortname__, \ + helpstring__, helparg__) \ + DEFINE_var(varname__, dashes__, shortname__, , \ + "", helpstring__, helparg__, options::Dir_list, \ + const options::Dir_list&, options::parse_dirlist) \ + void \ + add_to_##varname__(const char* new_value) \ + { options::parse_dirlist(NULL, new_value, &this->varname__##_.value); } \ + void \ + add_search_directory_to_##varname__(const Search_directory& dir) \ + { this->varname__##_.value.push_back(dir); } + +// When you have a list of possible values (expressed as string) +// After helparg__ should come an initializer list, like +// {"foo", "bar", "baz"} +#define DEFINE_enum(varname__, dashes__, shortname__, default_value__, \ + helpstring__, helparg__, ...) \ + DEFINE_var(varname__, dashes__, shortname__, default_value__, \ + default_value__, helpstring__, helparg__, \ + const char*, const char*, parse_choices_##varname__) \ + private: \ + static void parse_choices_##varname__(const char* option_name, \ + const char* arg, \ + const char** retval) { \ + const char* choices[] = __VA_ARGS__; \ + options::parse_choices(option_name, arg, retval, \ + choices, sizeof(choices) / sizeof(*choices)); \ + } + +// 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_ -} // End namespace gold::options. // 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 @@ -105,154 +387,216 @@ class Search_directory bool is_in_sysroot_; }; -// The position independent options which apply to the whole link. -// There are a lot of them. - class General_options { - public: - enum Object_format - { - // Ordinary ELF. - OBJECT_FORMAT_ELF, - // Straight binary format. - OBJECT_FORMAT_BINARY - }; - - 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', + _("Report usage information"), NULL); + DEFINE_special(version, options::TWO_DASHES, 'v', + _("Report version information"), NULL); + + DEFINE_bool(allow_shlib_undefined, options::TWO_DASHES, '\0', false, + _("Allow unresolved references in shared libraries"), + _("Do not allow unresolved references in shared libraries")); + + DEFINE_bool(as_needed, options::TWO_DASHES, '\0', false, + _("Only set DT_NEEDED for dynamic libs if used"), + _("Always DT_NEEDED for dynamic libs")); + + DEFINE_bool(Bdynamic, options::ONE_DASH, '\0', true, + _("-l searches for shared libraries"), NULL); + // Bstatic affects the same variable as Bdynamic, so we have to use + // the "special" macro to make that happen. + DEFINE_special(Bstatic, options::ONE_DASH, '\0', + _("-l does not search for shared libraries"), NULL); + + DEFINE_bool(Bsymbolic, options::ONE_DASH, '\0', false, + _("Bind defined symbols locally"), NULL); + + DEFINE_enum(format, options::TWO_DASHES, 'b', "elf", + _("Set input format"), _("[elf,binary]"), + {"elf", "binary", + "elf32-i386", "elf32-little", "elf32-big", + "elf64-x86_64", "elf64-little", "elf64-big"}); - // -d: define common symbols. - bool - define_common() const - { return this->define_common_; } +#ifdef HAVE_ZLIB_H + DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none", + _("Compress .debug_* sections in the output file"), + _("[none,zlib]"), + {"none", "zlib"}); +#else + DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none", + _("Compress .debug_* sections in the output file"), + _("[none]"), + {"none"}); +#endif - // -e: set entry address. - const char* - entry() const - { return this->entry_; } + DEFINE_bool(define_common, options::TWO_DASHES, 'd', false, + _("Define common symbols"), + _("Do not define common symbols")); + DEFINE_bool(dc, options::ONE_DASH, '\0', false, + _("Alias for -d"), NULL); + DEFINE_bool(dp, options::ONE_DASH, '\0', false, + _("Alias for -d"), NULL); - // -E: export dynamic symbols. - bool - export_dynamic() const - { return this->export_dynamic_; } + DEFINE_special(defsym, options::TWO_DASHES, '\0', + _("Define a symbol"), _("SYMBOL=EXPRESSION")); - // -h: shared library name. - const char* - soname() const - { return this->soname_; } + DEFINE_bool(demangle, options::TWO_DASHES, '\0', + getenv("COLLECT_NO_DEMANGLE") == NULL, + _("Demangle C++ symbols in log messages"), + _("Do not demangle C++ symbols in log messages")); - // -I: dynamic linker name. - const char* - dynamic_linker() const - { return this->dynamic_linker_; } + DEFINE_bool(detect_odr_violations, options::TWO_DASHES, '\0', false, + _("Try to detect violations of the One Definition Rule"), + NULL); + + DEFINE_string(entry, options::TWO_DASHES, 'e', NULL, + _("Set program start address"), _("ADDRESS")); + + DEFINE_bool(export_dynamic, options::TWO_DASHES, 'E', false, + _("Export all dynamic symbols"), NULL); - // -L: Library search path. - typedef std::vector<Search_directory> Dir_list; + DEFINE_bool(eh_frame_hdr, options::TWO_DASHES, '\0', false, + _("Create exception frame header"), NULL); + + DEFINE_string(soname, options::ONE_DASH, 'h', NULL, + _("Set shared library name"), _("FILENAME")); + + DEFINE_string(dynamic_linker, options::TWO_DASHES, 'I', NULL, + _("Set dynamic linker path"), _("PROGRAM")); + + DEFINE_special(library, options::TWO_DASHES, 'l', + _("Search for library LIBNAME"), _("LIBNAME")); - const Dir_list& - library_path() const - { return this->search_path_; } + DEFINE_dirlist(library_path, options::TWO_DASHES, 'L', + _("Add directory to search path"), _("DIR")); + + DEFINE_string(m, options::EXACTLY_ONE_DASH, 'm', "", + _("Ignored for compatibility"), _("EMULATION")); + + DEFINE_string(output, options::TWO_DASHES, 'o', "a.out", + _("Set output file name"), _("FILE")); + + DEFINE_uint(optimize, options::EXACTLY_ONE_DASH, 'O', 0, + _("Optimize output file size"), _("LEVEL")); + + DEFINE_enum(oformat, options::EXACTLY_TWO_DASHES, '\0', "elf", + _("Set output format"), _("[binary]"), + {"elf", "binary"}); + + DEFINE_bool(emit_relocs, options::TWO_DASHES, 'q', false, + _("Generate relocations in output"), NULL); + + DEFINE_bool(relocatable, options::EXACTLY_ONE_DASH, 'r', false, + _("Generate relocatable output"), NULL); + + // -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', + _("Add DIR to runtime search path"), _("DIR")); + + DEFINE_dirlist(rpath, options::ONE_DASH, '\0', + _("Add DIR to runtime search path"), _("DIR")); + + DEFINE_special(just_symbols, options::TWO_DASHES, '\0', + _("Read only symbol values from FILE"), _("FILE")); + + DEFINE_dirlist(rpath_link, options::TWO_DASHES, '\0', + _("Add DIR to link time shared library search path"), + _("DIR")); + + DEFINE_bool(strip_all, options::TWO_DASHES, 's', false, + _("Strip all symbols"), NULL); + DEFINE_bool(strip_debug_gdb, options::TWO_DASHES, '\0', false, + _("Strip debug symbols that are unused by gdb " + "(at least versions <= 6.7)"), NULL); + DEFINE_bool(strip_debug, options::TWO_DASHES, 'S', false, + _("Strip debugging information"), NULL); + + DEFINE_bool(shared, options::ONE_DASH, '\0', false, + _("Generate shared library"), NULL); + + // 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', + _("Do not link against shared libraries"), NULL); + + DEFINE_bool(stats, options::TWO_DASHES, '\0', false, + _("Print resource usage statistics"), NULL); + + DEFINE_string(sysroot, options::TWO_DASHES, '\0', "", + _("Set target system root directory"), _("DIR")); + + DEFINE_uint64(Tbss, options::ONE_DASH, '\0', -1U, + _("Set the address of the bss segment"), _("ADDRESS")); + DEFINE_uint64(Tdata, options::ONE_DASH, '\0', -1U, + _("Set the address of the data segment"), _("ADDRESS")); + DEFINE_uint64(Ttext, options::ONE_DASH, '\0', -1U, + _("Set the address of the text segment"), _("ADDRESS")); + + DEFINE_special(script, options::TWO_DASHES, 'T', + _("Read linker script"), _("FILE")); + DEFINE_special(version_script, options::TWO_DASHES, '\0', + _("Read version script"), _("FILE")); + + DEFINE_bool(threads, options::TWO_DASHES, '\0', false, + _("Run the linker multi-threaded"), + _("Do not run the linker multi-threaded")); + DEFINE_uint(thread_count, options::TWO_DASHES, '\0', 0, + _("Number of threads to use"), _("COUNT")); + DEFINE_uint(thread_count_initial, options::TWO_DASHES, '\0', 0, + _("Number of threads to use in initial pass"), _("COUNT")); + DEFINE_uint(thread_count_middle, options::TWO_DASHES, '\0', 0, + _("Number of threads to use in middle pass"), _("COUNT")); + DEFINE_uint(thread_count_final, options::TWO_DASHES, '\0', 0, + _("Number of threads to use in final pass"), _("COUNT")); + + DEFINE_bool(whole_archive, options::TWO_DASHES, '\0', false, + _("Include all archive contents"), + _("Include only needed archive contents")); + + DEFINE_special(start_group, options::TWO_DASHES, '(', + _("Start a library search group"), NULL); + DEFINE_special(end_group, options::TWO_DASHES, ')', + _("End a library search group"), NULL); + + DEFINE_string(debug, options::TWO_DASHES, '\0', "", + _("Turn on debugging"), _("[task,script,all][,...]")); + + // The -z flags. + + // Both execstack and noexecstack differ from the default execstack_ + // value, so we need to use different variables for them. + DEFINE_bool(execstack, options::DASH_Z, '\0', false, + _("Mark output as requiring executable stack"), NULL); + DEFINE_bool(noexecstack, options::DASH_Z, '\0', false, + _("Mark output as not requiring executable stack"), NULL); + DEFINE_uint64(max_page_size, options::DASH_Z, '\0', 0, + _("Set maximum page size to SIZE"), _("SIZE")); + DEFINE_uint64(common_page_size, options::DASH_Z, '\0', 0, + _("Set common page size to SIZE"), _("SIZE")); - // -O: optimization level (0: don't try to optimize output size). - int - optimize() const - { return this->optimization_level_; } + public: + typedef options::Dir_list Dir_list; - // -o: Output file name. - const char* - output_file_name() const - { return this->output_file_name_; } + General_options(); - // --oformat: Output format. - Object_format - oformat_enum() const - { return this->oformat_; } + // 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(); + // The macro defines output() (based on --output), but that's a + // generic name. Provide this alternative name, which is clearer. const char* - oformat() const - { return this->oformat_string_; } - - // Return the default target. - Target* - default_target() const; - - // -q: Whether to emit relocations. - bool - emit_relocs() const - { return this->emit_relocs_; } - - // -r: Whether we are doing a relocatable link. - bool - relocatable() const - { return this->is_relocatable_; } - - // -s: Strip all symbols. - bool - strip_all() const - { return this->strip_ == STRIP_ALL; } - - // -S: Strip debugging information. - bool - strip_debug() const - { return this->strip_ == STRIP_ALL || this->strip_ == STRIP_DEBUG; } - - // --strip-debug-gdb: strip only debugging information that's not - // used by gdb (at least, for gdb versions <= 6.7). - bool - strip_debug_gdb() const - { return this->strip_debug() || this->strip_ == STRIP_DEBUG_UNUSED_BY_GDB; } - - // --allow-shlib-undefined: do not warn about unresolved symbols in - // --shared libraries. - bool - allow_shlib_undefined() const - { return this->allow_shlib_undefined_; } - - // -Bsymbolic: bind defined symbols locally. - bool - Bsymbolic() const - { return this->symbolic_; } - - // --compress-debug-sections: compress .debug_* sections in the - // output file using the given compression method. This is useful - // when the tools (such as gdb) support compressed sections. - bool - compress_debug_sections() const - { return this->compress_debug_sections_ != NO_COMPRESSION; } - - bool - zlib_compress_debug_sections() const - { return this->compress_debug_sections_ == ZLIB_COMPRESSION; } - - // --demangle: demangle C++ symbols in our log messages. - bool - demangle() const - { return this->demangle_; } - - // --detect-odr-violations: Whether to search for One Defn Rule violations. - bool - detect_odr_violations() const - { return this->detect_odr_violations_; } - - // --eh-frame-hdr: Whether to generate an exception frame header. - bool - eh_frame_hdr() const - { return this->create_eh_frame_hdr_; } - - // --rpath: The runtime search path. - const Dir_list& - rpath() const - { return this->rpath_; } - - // --rpath-link: The link time search patch for shared libraries. - const Dir_list& - rpath_link() const - { return this->rpath_link_; } - - // --shared: Whether generating a shared object. - bool - shared() const - { return this->is_shared_; } + 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. @@ -260,500 +604,121 @@ class General_options output_is_position_independent() const { return this->shared(); } - // --static: Whether doing a static link. + // 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 this->is_static_; } - - // --stats: Print resource usage statistics. - bool - stats() const - { return this->print_stats_; } - - // --sysroot: The system root of a cross-linker. - const std::string& - sysroot() const - { return this->sysroot_; } - - // -Tbss: The address of the BSS segment - uint64_t - Tbss() const - { return this->bss_segment_address_; } + { return static_; } - // Whether -Tbss was used. - bool - user_set_Tbss() const - { return this->bss_segment_address_ != -1U; } - - // -Tdata: The address of the data segment - uint64_t - Tdata() const - { return this->data_segment_address_; } - - // Whether -Tdata was used. - bool - user_set_Tdata() const - { return this->data_segment_address_ != -1U; } - - // -Ttext: The address of the .text section - uint64_t - Ttext() const - { return this->text_segment_address_; } - - // Whether -Ttext was used. - bool - user_set_Ttext() const - { return this->text_segment_address_ != -1U; } - - // --threads: Whether to use threads. - bool - threads() const - { return this->threads_; } - - // --thread-count-initial: Threads to use in initial pass. - int - thread_count_initial() const - { return this->thread_count_initial_; } - - // --thread-count-middle: Threads to use in middle pass. - int - thread_count_middle() const - { return this->thread_count_middle_; } + // 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 + }; - // --thread-count-final: Threads to use in final pass. - int - thread_count_final() const - { return this->thread_count_final_; } + // Note: these functions are not very fast. + Object_format format_enum() const; + Object_format oformat_enum() const; - // -z execstack, -z noexecstack + // 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_ != EXECSTACK_FROM_INPUT; } + { return this->execstack_status_ != EXECSTACK_FROM_INPUT; } bool is_stack_executable() const - { return this->execstack_ == EXECSTACK_YES; } - - // -z max-page-size - uint64_t - max_page_size() const - { return this->max_page_size_; } - - // -z common-page-size - uint64_t - common_page_size() const - { return this->common_page_size_; } - - // --debug - unsigned int - debug() const - { return this->debug_; } + { return this->execstack_status_ == EXECSTACK_YES; } private: // Don't copy this structure. General_options(const General_options&); General_options& operator=(const General_options&); - friend class Command_line; - friend class options::Command_line_options; - - // Which symbols to strip. - enum Strip - { - // Don't strip any symbols. - STRIP_NONE, - // Strip all symbols. - STRIP_ALL, - // Strip debugging information. - STRIP_DEBUG, - // Strip debugging information that's not used by gdb (at least <= 6.7) - STRIP_DEBUG_UNUSED_BY_GDB - }; - // Whether to mark the stack as executable. enum Execstack { // Not set on command line. EXECSTACK_FROM_INPUT, - // Mark the stack as executable. + // Mark the stack as executable (-z execstack). EXECSTACK_YES, - // Mark the stack as not executable. + // Mark the stack as not executable (-z noexecstack). EXECSTACK_NO }; - // What compression method to use - enum CompressionMethod - { - NO_COMPRESSION, - ZLIB_COMPRESSION, - }; - - void - set_define_common(bool value) - { - this->define_common_ = value; - this->user_set_define_common_ = true; - } - - void - set_no_define_common(bool value) - { this->set_define_common(!value); } - - bool - user_set_define_common() const - { return this->user_set_define_common_; } - - void - set_entry(const char* arg) - { this->entry_ = arg; } - - void - set_export_dynamic(bool value) - { this->export_dynamic_ = value; } - - void - set_soname(const char* arg) - { this->soname_ = arg; } - - void - set_dynamic_linker(const char* arg) - { this->dynamic_linker_ = arg; } - - void - add_to_search_path(const char* arg) - { this->search_path_.push_back(Search_directory(arg, false)); } - - void - add_to_search_path_with_sysroot(const char* arg) - { this->search_path_.push_back(Search_directory(arg, true)); } - - void - set_optimize(const char* arg) - { - char* endptr; - this->optimization_level_ = strtol(arg, &endptr, 0); - if (*endptr != '\0' || this->optimization_level_ < 0) - gold_fatal(_("invalid optimization level: %s"), arg); - } - - void - set_output(const char* arg) - { this->output_file_name_ = arg; } - - void - set_oformat(const char*); - - void - set_emit_relocs(bool value) - { this->emit_relocs_ = value; } - - void - set_relocatable(bool value) - { this->is_relocatable_ = value; } - - void - set_strip_all(bool) - { this->strip_ = STRIP_ALL; } - - // Note: normalize_options() depends on the fact that this turns off - // STRIP_ALL if it were already set. - void - set_strip_debug(bool) - { this->strip_ = STRIP_DEBUG; } - - void - set_strip_debug_gdb(bool) - { this->strip_ = STRIP_DEBUG_UNUSED_BY_GDB; } - - void - set_allow_shlib_undefined(bool value) - { this->allow_shlib_undefined_ = value; } - - void - set_no_allow_shlib_undefined(bool value) - { this->set_allow_shlib_undefined(!value); } - - void - set_Bsymbolic(bool value) - { this->symbolic_ = value; } - - void set_compress_debug_sections(const char* arg) - { - if (strcmp(arg, "none") == 0) - this->compress_debug_sections_ = NO_COMPRESSION; -#ifdef HAVE_ZLIB_H - else if (strcmp(arg, "zlib") == 0) - this->compress_debug_sections_ = ZLIB_COMPRESSION; -#endif - else - gold_fatal(_("unsupported argument to --compress-debug-sections: %s"), - arg); - } - - void - add_to_defsym(const char* arg); - - void - set_demangle(bool value) - { this->demangle_ = value; } - - void - set_no_demangle(bool value) - { this->set_demangle(!value); } - - void - set_detect_odr_violations(bool value) - { this->detect_odr_violations_ = value; } - - void - set_eh_frame_hdr(bool value) - { this->create_eh_frame_hdr_ = value; } - - void - add_to_rpath(const char* arg) - { this->rpath_.push_back(Search_directory(arg, false)); } - - void - add_to_rpath_link(const char* arg) - { this->rpath_link_.push_back(Search_directory(arg, false)); } - + Execstack execstack_status_; void - set_shared(bool value) - { this->is_shared_ = value; } + set_execstack_status(Execstack value) + { execstack_status_ = value; } + bool static_; void set_static(bool value) - { this->is_static_ = value; } - - void - set_stats(bool value) - { this->print_stats_ = value; } - - void - set_sysroot(const char* arg) - { this->sysroot_ = arg; } - - void - set_segment_address(const char* name, const char* arg, uint64_t* val) - { - char* endptr; - *val = strtoull(arg, &endptr, 0); - if (*endptr != '\0' || *val == -1U) - gold_fatal(_("invalid argument to %s: %s"), name, arg); - } - - void - set_Tbss(const char* arg) - { this->set_segment_address("-Tbss", arg, &this->bss_segment_address_); } - - void - set_Tdata(const char* arg) - { this->set_segment_address("-Tdata", arg, &this->data_segment_address_); } - - void - set_Ttext(const char* arg) - { this->set_segment_address("-Ttext", arg, &this->text_segment_address_); } - - int - parse_thread_count(const char* arg) - { - char* endptr; - const int count = strtol(arg, &endptr, 0); - if (*endptr != '\0' || count < 0) - gold_fatal(_("invalid thread count: %s"), arg); - return count; - } - - void - set_threads(bool value) - { -#ifndef ENABLE_THREADS - if (value) - gold_fatal(_("--threads not supported")); -#endif - this->threads_ = value; - } - - void - set_no_threads(bool value) - { this->set_threads(!value); } - - void - set_thread_count(const char* arg) - { - int count = this->parse_thread_count(arg); - this->thread_count_initial_ = count; - this->thread_count_middle_ = count; - this->thread_count_final_ = count; - } - - void - set_thread_count_initial(const char* arg) - { this->thread_count_initial_ = this->parse_thread_count(arg); } - - void - set_thread_count_middle(const char* arg) - { this->thread_count_middle_ = this->parse_thread_count(arg); } - - void - set_thread_count_final(const char* arg) - { this->thread_count_final_ = this->parse_thread_count(arg); } - - void - ignore(const char*) - { } + { static_ = value; } + // These are called by finalize() to set up the search-path correctly. void - set_execstack(bool) - { this->execstack_ = EXECSTACK_YES; } - - void - set_noexecstack(bool) - { this->execstack_ = EXECSTACK_NO; } - - void - set_max_page_size(const char* arg) - { - char* endptr; - this->max_page_size_ = strtoull(arg, &endptr, 0); - if (*endptr != '\0' || this->max_page_size_ == 0) - gold_fatal(_("invalid max-page-size: %s"), arg); - } - - void - set_common_page_size(const char* arg) - { - char* endptr; - this->common_page_size_ = strtoull(arg, &endptr, 0); - if (*endptr != '\0' || this->common_page_size_ == 0) - gold_fatal(_("invalid common-page-size: %s"), arg); - } - - void - set_debug(unsigned int flags) - { this->debug_ = flags; } - - // Handle the -z option. - void - handle_z_option(const char*); - - // Handle the --debug option. - void - handle_debug_option(const char*); + 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(); - - bool define_common_; - bool user_set_define_common_; - const char* entry_; - bool export_dynamic_; - const char* soname_; - const char* dynamic_linker_; - Dir_list search_path_; - int optimization_level_; - const char* output_file_name_; - Object_format oformat_; - const char* oformat_string_; - bool emit_relocs_; - bool is_relocatable_; - Strip strip_; - bool allow_shlib_undefined_; - bool symbolic_; - CompressionMethod compress_debug_sections_; - bool demangle_; - bool detect_odr_violations_; - bool create_eh_frame_hdr_; - Dir_list rpath_; - Dir_list rpath_link_; - bool is_shared_; - bool is_static_; - bool print_stats_; - std::string sysroot_; - uint64_t bss_segment_address_; - uint64_t data_segment_address_; - uint64_t text_segment_address_; - bool threads_; - int thread_count_initial_; - int thread_count_middle_; - int thread_count_final_; - Execstack execstack_; - uint64_t max_page_size_; - uint64_t common_page_size_; - unsigned int debug_; }; -// The current state of the position dependent options. +// 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__) \ + public: \ + type__ \ + varname__() const \ + { return this->varname__##_; } \ + \ + void \ + set_##varname__(type__ value) \ + { this->varname__##_ = value; } \ + private: \ + type__ varname__##_ class Position_dependent_options { public: - typedef General_options::Object_format Object_format; - - Position_dependent_options(); - - // -Bdynamic/-Bstatic: Whether we are searching for a static archive - // -rather than a shared object. - bool - Bdynamic() const - { return !this->do_static_search_; } - - // --as-needed: Whether to add a DT_NEEDED argument only if the - // dynamic object is used. - bool - as_needed() const - { return this->as_needed_; } - - // --whole-archive: Whether to include the entire contents of an - // --archive. - bool - whole_archive() const - { return this->include_whole_archive_; } - - // --format: The format of the input file. - Object_format - format_enum() const - { return this->input_format_; } - - void - set_Bstatic(bool value) - { this->do_static_search_ = value; } - - void - set_Bdynamic(bool value) - { this->set_Bstatic(!value); } + Position_dependent_options(const General_options& options + = Position_dependent_options::default_options_) + { copy_from_options(options); } - void - set_as_needed(bool value) - { this->as_needed_ = value; } - - void - set_no_as_needed(bool value) - { this->set_as_needed(!value); } - - void - set_whole_archive(bool value) - { this->include_whole_archive_ = value; } - - void - set_no_whole_archive(bool value) - { this->set_whole_archive(!value); } - - void - set_format(const char*); + void copy_from_options(const General_options& options) + { + this->set_as_needed(options.as_needed()); + this->set_Bdynamic(options.Bdynamic()); + this->set_format_enum(options.format_enum()); + this->set_whole_archive(options.whole_archive()); + } - void - set_format_enum(Object_format value) - { this->input_format_ = value; } + DEFINE_posdep(as_needed, bool); + DEFINE_posdep(Bdynamic, bool); + DEFINE_posdep(format_enum, General_options::Object_format); + DEFINE_posdep(whole_archive, bool); private: - bool do_static_search_; - bool as_needed_; - bool include_whole_archive_; - Object_format input_format_; + // This is a General_options with everything set to its default + // value. A Position_dependent_options created with no argument + // will take its values from here. + static General_options default_options_; }; + // A single file or library argument from the command line. class Input_file_argument @@ -775,8 +740,20 @@ class Input_file_argument Input_file_argument(const char* name, bool is_lib, const char* extra_search_path, - bool just_symbols, - const Position_dependent_options& options) + bool just_symbols, + const Position_dependent_options& options) + : name_(name), is_lib_(is_lib), extra_search_path_(extra_search_path), + just_symbols_(just_symbols), options_(options) + { } + + // You can also pass in a General_options instance instead of a + // Position_dependent_options. In that case, we extract the + // position-independent vars from the General_options and only store + // those. + Input_file_argument(const char* name, bool is_lib, + const char* extra_search_path, + bool just_symbols, + const General_options& options) : name_(name), is_lib_(is_lib), extra_search_path_(extra_search_path), just_symbols_(just_symbols), options_(options) { } @@ -798,7 +775,7 @@ class Input_file_argument { return (this->extra_search_path_.empty() ? NULL - : this->extra_search_path_.c_str()); + : this->extra_search_path_.c_str()); } // Return whether we should only read symbols from this file. @@ -963,7 +940,13 @@ class Input_arguments bool in_group_; }; -// All the information read from the command line. + +// All the information read from the command line. These are held in +// three separate structs: one to hold the options (--foo), one to +// hold the filenames listed on the commandline, and one to hold +// linker script information. This third is not a subset of the other +// two because linker scripts can be specified either as options (via +// -T) or as a file. class Command_line { @@ -975,43 +958,14 @@ class Command_line // Process the command line options. This will exit with an // appropriate error message if an unrecognized option is seen. void - process(int argc, char** argv); + process(int argc, const char** argv); // Process one command-line option. This takes the index of argv to - // process, and returns the index for the next option. - int - process_one_option(int argc, char** argv, int i, bool* no_more_options); - - // Handle a -l option. + // process, and returns the index for the next option. no_more_options + // is set to true if argv[i] is "--". int - process_l_option(int, char**, char*, bool); - - // Handle a -R option when it means --rpath. - void - add_to_rpath(const char* arg) - { this->options_.add_to_rpath(arg); } - - // Add a file for which we just read the symbols. - void - add_just_symbols_file(const char* arg) - { - this->inputs_.add_file(Input_file_argument(arg, false, "", true, - this->position_options_)); - } - - // Handle a --start-group option. - void - start_group(const char* arg); - - // Handle a --end-group option. - void - end_group(const char* arg); - - // Get an option argument--a helper function for special processing. - const char* - get_special_argument(const char* longname, int argc, char** argv, - const char* arg, bool long_option, - int *pret); + process_one_option(int argc, const char** argv, int i, + bool* no_more_options); // Get the general options. const General_options& @@ -1033,6 +987,11 @@ class Command_line version_script() const { return *this->script_options_.version_script_info(); } + // Get the input files. + Input_arguments& + inputs() + { return this->inputs_; } + // The number of input files. int number_of_input_files() const @@ -1052,27 +1011,6 @@ class Command_line Command_line(const Command_line&); Command_line& operator=(const Command_line&); - // Report usage error. - void - usage() ATTRIBUTE_NORETURN; - void - usage(const char* msg, const char* opt) ATTRIBUTE_NORETURN; - void - usage(const char* msg, char opt) ATTRIBUTE_NORETURN; - - // Apply a command line option. - void - apply_option(const gold::options::One_option&, const char*); - - // Add a file. - void - add_file(const char* name, bool is_lib); - - // Examine the result of processing the command-line, and verify - // the flags do not contradict each other or are otherwise illegal. - void - normalize_options(); - General_options options_; Position_dependent_options position_options_; Script_options script_options_; |