This is binutils.info, produced by makeinfo version 7.0.2 from binutils.texi. Copyright © 1991-2023 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled “GNU Free Documentation License”. INFO-DIR-SECTION Software development START-INFO-DIR-ENTRY * Binutils: (binutils). The GNU binary utilities. END-INFO-DIR-ENTRY INFO-DIR-SECTION Individual utilities START-INFO-DIR-ENTRY * addr2line: (binutils)addr2line. Convert addresses to file and line. * ar: (binutils)ar. Create, modify, and extract from archives. * c++filt: (binutils)c++filt. Filter to demangle encoded C++ symbols. * cxxfilt: (binutils)c++filt. MS-DOS name for c++filt. * dlltool: (binutils)dlltool. Create files needed to build and use DLLs. * nm: (binutils)nm. List symbols from object files. * objcopy: (binutils)objcopy. Copy and translate object files. * objdump: (binutils)objdump. Display information from object files. * ranlib: (binutils)ranlib. Generate index to archive contents. * readelf: (binutils)readelf. Display the contents of ELF format files. * size: (binutils)size. List section sizes and total size. * strings: (binutils)strings. List printable strings from files. * strip: (binutils)strip. Discard symbols. * elfedit: (binutils)elfedit. Update ELF header and property of ELF files. * windmc: (binutils)windmc. Generator for Windows message resources. * windres: (binutils)windres. Manipulate Windows resources. END-INFO-DIR-ENTRY  File: binutils.info, Node: Top, Next: ar, Up: (dir) Introduction ************ This brief manual contains documentation for the GNU binary utilities (GNU Binutils) version 2.40.90: This document is distributed under the terms of the GNU Free Documentation License version 1.3. A copy of the license is included in the section entitled “GNU Free Documentation License”. * Menu: * ar:: Create, modify, and extract from archives * nm:: List symbols from object files * objcopy:: Copy and translate object files * objdump:: Display information from object files * ranlib:: Generate index to archive contents * size:: List section sizes and total size * strings:: List printable strings from files * strip:: Discard symbols * c++filt:: Filter to demangle encoded C++ symbols * cxxfilt: c++filt. MS-DOS name for c++filt * addr2line:: Convert addresses or symbol+offset to file and line * windmc:: Generator for Windows message resources * windres:: Manipulate Windows resources * dlltool:: Create files needed to build and use DLLs * readelf:: Display the contents of ELF format files * elfedit:: Update ELF header and property of ELF files * Common Options:: Command-line options for all utilities * Selecting the Target System:: How these utilities determine the target * debuginfod:: Using binutils with debuginfod * Reporting Bugs:: Reporting Bugs * GNU Free Documentation License:: GNU Free Documentation License * Binutils Index:: Binutils Index  File: binutils.info, Node: ar, Next: nm, Prev: Top, Up: Top 1 ar **** ar [-]P[MOD] [--plugin NAME] [--target BFDNAME] [--output DIRNAME] [--record-libdeps LIBDEPS] [RELPOS] [COUNT] ARCHIVE [MEMBER...] ar -M [ ’), and continues executing even after errors. If you redirect standard input to a script file, no prompts are issued, and ‘ar’ abandons execution (with a nonzero exit code) on any error. The ‘ar’ command language is _not_ designed to be equivalent to the command-line options; in fact, it provides somewhat less control over archives. The only purpose of the command language is to ease the transition to GNU ‘ar’ for developers who already have scripts written for the MRI “librarian” program. The syntax for the ‘ar’ command language is straightforward: • commands are recognized in upper or lower case; for example, ‘LIST’ is the same as ‘list’. In the following descriptions, commands are shown in upper case for clarity. • a single command may appear on each line; it is the first word on the line. • empty lines are allowed, and have no effect. • comments are allowed; text after either of the characters ‘*’ or ‘;’ is ignored. • Whenever you use a list of names as part of the argument to an ‘ar’ command, you can separate the individual names with either commas or blanks. Commas are shown in the explanations below, for clarity. • ‘+’ is used as a line continuation character; if ‘+’ appears at the end of a line, the text on the following line is considered part of the current command. Here are the commands you can use in ‘ar’ scripts, or when using ‘ar’ interactively. Three of them have special significance: ‘OPEN’ or ‘CREATE’ specify a “current archive”, which is a temporary file required for most of the other commands. ‘SAVE’ commits the changes so far specified by the script. Prior to ‘SAVE’, commands affect only the temporary copy of the current archive. ‘ADDLIB ARCHIVE’ ‘ADDLIB ARCHIVE (MODULE, MODULE, ... MODULE)’ Add all the contents of ARCHIVE (or, if specified, each named MODULE from ARCHIVE) to the current archive. Requires prior use of ‘OPEN’ or ‘CREATE’. ‘ADDMOD MEMBER, MEMBER, ... MEMBER’ Add each named MEMBER as a module in the current archive. Requires prior use of ‘OPEN’ or ‘CREATE’. ‘CLEAR’ Discard the contents of the current archive, canceling the effect of any operations since the last ‘SAVE’. May be executed (with no effect) even if no current archive is specified. ‘CREATE ARCHIVE’ Creates an archive, and makes it the current archive (required for many other commands). The new archive is created with a temporary name; it is not actually saved as ARCHIVE until you use ‘SAVE’. You can overwrite existing archives; similarly, the contents of any existing file named ARCHIVE will not be destroyed until ‘SAVE’. ‘DELETE MODULE, MODULE, ... MODULE’ Delete each listed MODULE from the current archive; equivalent to ‘ar -d ARCHIVE MODULE ... MODULE’. Requires prior use of ‘OPEN’ or ‘CREATE’. ‘DIRECTORY ARCHIVE (MODULE, ... MODULE)’ ‘DIRECTORY ARCHIVE (MODULE, ... MODULE) OUTPUTFILE’ List each named MODULE present in ARCHIVE. The separate command ‘VERBOSE’ specifies the form of the output: when verbose output is off, output is like that of ‘ar -t ARCHIVE MODULE...’. When verbose output is on, the listing is like ‘ar -tv ARCHIVE MODULE...’. Output normally goes to the standard output stream; however, if you specify OUTPUTFILE as a final argument, ‘ar’ directs the output to that file. ‘END’ Exit from ‘ar’, with a ‘0’ exit code to indicate successful completion. This command does not save the output file; if you have changed the current archive since the last ‘SAVE’ command, those changes are lost. ‘EXTRACT MODULE, MODULE, ... MODULE’ Extract each named MODULE from the current archive, writing them into the current directory as separate files. Equivalent to ‘ar -x ARCHIVE MODULE...’. Requires prior use of ‘OPEN’ or ‘CREATE’. ‘LIST’ Display full contents of the current archive, in “verbose” style regardless of the state of ‘VERBOSE’. The effect is like ‘ar tv ARCHIVE’. (This single command is a GNU ‘ar’ enhancement, rather than present for MRI compatibility.) Requires prior use of ‘OPEN’ or ‘CREATE’. ‘OPEN ARCHIVE’ Opens an existing archive for use as the current archive (required for many other commands). Any changes as the result of subsequent commands will not actually affect ARCHIVE until you next use ‘SAVE’. ‘REPLACE MODULE, MODULE, ... MODULE’ In the current archive, replace each existing MODULE (named in the ‘REPLACE’ arguments) from files in the current working directory. To execute this command without errors, both the file, and the module in the current archive, must exist. Requires prior use of ‘OPEN’ or ‘CREATE’. ‘VERBOSE’ Toggle an internal flag governing the output from ‘DIRECTORY’. When the flag is on, ‘DIRECTORY’ output matches output from ‘ar -tv ’.... ‘SAVE’ Commit your changes to the current archive, and actually save it as a file with the name specified in the last ‘CREATE’ or ‘OPEN’ command. Requires prior use of ‘OPEN’ or ‘CREATE’.  File: binutils.info, Node: nm, Next: objcopy, Prev: ar, Up: Top 2 nm **** nm [-A|-o|--print-file-name] [-a|--debug-syms] [-B|--format=bsd] [-C|--demangle[=STYLE]] [-D|--dynamic] [-fFORMAT|--format=FORMAT] [-g|--extern-only] [-h|--help] [--ifunc-chars=CHARS] [-j|--format=just-symbols] [-l|--line-numbers] [--inlines] [-n|-v|--numeric-sort] [-P|--portability] [-p|--no-sort] [-r|--reverse-sort] [-S|--print-size] [-s|--print-armap] [-t RADIX|--radix=RADIX] [-u|--undefined-only] [-U|--defined-only] [-V|--version] [-W|--no-weak] [-X 32_64] [--no-demangle] [--no-recurse-limit|--recurse-limit]] [--plugin NAME] [--size-sort] [--special-syms] [--synthetic] [--target=BFDNAME] [--unicode=METHOD] [--with-symbol-versions] [--without-symbol-versions] [OBJFILE...] GNU ‘nm’ lists the symbols from object files OBJFILE.... If no object files are listed as arguments, ‘nm’ assumes the file ‘a.out’. For each symbol, ‘nm’ shows: • The symbol value, in the radix selected by options (see below), or hexadecimal by default. • The symbol type. At least the following types are used; others are, as well, depending on the object file format. If lowercase, the symbol is usually local; if uppercase, the symbol is global (external). There are however a few lowercase symbols that are shown for special global symbols (‘u’, ‘v’ and ‘w’). ‘A’ The symbol’s value is absolute, and will not be changed by further linking. ‘B’ ‘b’ The symbol is in the BSS data section. This section typically contains zero-initialized or uninitialized data, although the exact behavior is system dependent. ‘C’ ‘c’ The symbol is common. Common symbols are uninitialized data. When linking, multiple common symbols may appear with the same name. If the symbol is defined anywhere, the common symbols are treated as undefined references. For more details on common symbols, see the discussion of –warn-common in *note Linker options: (ld.info)Options. The lower case C character is used when the symbol is in a special section for small commons. ‘D’ ‘d’ The symbol is in the initialized data section. ‘G’ ‘g’ The symbol is in an initialized data section for small objects. Some object file formats permit more efficient access to small data objects, such as a global int variable as opposed to a large global array. ‘i’ For PE format files this indicates that the symbol is in a section specific to the implementation of DLLs. For ELF format files this indicates that the symbol is an indirect function. This is a GNU extension to the standard set of ELF symbol types. It indicates a symbol which if referenced by a relocation does not evaluate to its address, but instead must be invoked at runtime. The runtime execution will then return the value to be used in the relocation. Note - the actual symbols display for GNU indirect symbols is controlled by the ‘--ifunc-chars’ command line option. If this option has been provided then the first character in the string will be used for global indirect function symbols. If the string contains a second character then that will be used for local indirect function symbols. ‘I’ The symbol is an indirect reference to another symbol. ‘N’ The symbol is a debugging symbol. ‘n’ The symbol is in a non-data, non-code, non-debug read-only section. ‘p’ The symbol is in a stack unwind section. ‘R’ ‘r’ The symbol is in a read only data section. ‘S’ ‘s’ The symbol is in an uninitialized or zero-initialized data section for small objects. ‘T’ ‘t’ The symbol is in the text (code) section. ‘U’ The symbol is undefined. ‘u’ The symbol is a unique global symbol. This is a GNU extension to the standard set of ELF symbol bindings. For such a symbol the dynamic linker will make sure that in the entire process there is just one symbol with this name and type in use. ‘V’ ‘v’ The symbol is a weak object. When a weak defined symbol is linked with a normal defined symbol, the normal defined symbol is used with no error. When a weak undefined symbol is linked and the symbol is not defined, the value of the weak symbol becomes zero with no error. On some systems, uppercase indicates that a default value has been specified. ‘W’ ‘w’ The symbol is a weak symbol that has not been specifically tagged as a weak object symbol. When a weak defined symbol is linked with a normal defined symbol, the normal defined symbol is used with no error. When a weak undefined symbol is linked and the symbol is not defined, the value of the symbol is determined in a system-specific manner without error. On some systems, uppercase indicates that a default value has been specified. ‘-’ The symbol is a stabs symbol in an a.out object file. In this case, the next values printed are the stabs other field, the stabs desc field, and the stab type. Stabs symbols are used to hold debugging information. ‘?’ The symbol type is unknown, or object file format specific. • The symbol name. If a symbol has version information associated with it, then the version information is displayed as well. If the versioned symbol is undefined or hidden from linker, the version string is displayed as a suffix to the symbol name, preceded by an @ character. For example ‘foo@VER_1’. If the version is the default version to be used when resolving unversioned references to the symbol, then it is displayed as a suffix preceded by two @ characters. For example ‘foo@@VER_2’. The long and short forms of options, shown here as alternatives, are equivalent. ‘-A’ ‘-o’ ‘--print-file-name’ Precede each symbol by the name of the input file (or archive member) in which it was found, rather than identifying the input file once only, before all of its symbols. ‘-a’ ‘--debug-syms’ Display all symbols, even debugger-only symbols; normally these are not listed. ‘-B’ The same as ‘--format=bsd’ (for compatibility with the MIPS ‘nm’). ‘-C’ ‘--demangle[=STYLE]’ Decode (“demangle”) low-level symbol names into user-level names. Besides removing any initial underscore prepended by the system, this makes C++ function names readable. Different compilers have different mangling styles. The optional demangling style argument can be used to choose an appropriate demangling style for your compiler. *Note c++filt::, for more information on demangling. ‘--no-demangle’ Do not demangle low-level symbol names. This is the default. ‘--recurse-limit’ ‘--no-recurse-limit’ ‘--recursion-limit’ ‘--no-recursion-limit’ Enables or disables a limit on the amount of recursion performed whilst demangling strings. Since the name mangling formats allow for an infinite level of recursion it is possible to create strings whose decoding will exhaust the amount of stack space available on the host machine, triggering a memory fault. The limit tries to prevent this from happening by restricting recursion to 2048 levels of nesting. The default is for this limit to be enabled, but disabling it may be necessary in order to demangle truly complicated names. Note however that if the recursion limit is disabled then stack exhaustion is possible and any bug reports about such an event will be rejected. ‘-D’ ‘--dynamic’ Display the dynamic symbols rather than the normal symbols. This is only meaningful for dynamic objects, such as certain types of shared libraries. ‘-f FORMAT’ ‘--format=FORMAT’ Use the output format FORMAT, which can be ‘bsd’, ‘sysv’, ‘posix’ or ‘just-symbols’. The default is ‘bsd’. Only the first character of FORMAT is significant; it can be either upper or lower case. ‘-g’ ‘--extern-only’ Display only external symbols. ‘-h’ ‘--help’ Show a summary of the options to ‘nm’ and exit. ‘--ifunc-chars=CHARS’ When display GNU indirect function symbols ‘nm’ will default to using the ‘i’ character for both local indirect functions and global indirect functions. The ‘--ifunc-chars’ option allows the user to specify a string containing one or two characters. The first character will be used for global indirect function symbols and the second character, if present, will be used for local indirect function symbols. ‘j’ The same as ‘--format=just-symbols’. ‘-l’ ‘--line-numbers’ For each symbol, use debugging information to try to find a filename and line number. For a defined symbol, look for the line number of the address of the symbol. For an undefined symbol, look for the line number of a relocation entry which refers to the symbol. If line number information can be found, print it after the other symbol information. ‘--inlines’ When option ‘-l’ is active, if the address belongs to a function that was inlined, then this option causes the source information for all enclosing scopes back to the first non-inlined function to be printed as well. For example, if ‘main’ inlines ‘callee1’ which inlines ‘callee2’, and address is from ‘callee2’, the source information for ‘callee1’ and ‘main’ will also be printed. ‘-n’ ‘-v’ ‘--numeric-sort’ Sort symbols numerically by their addresses, rather than alphabetically by their names. ‘-p’ ‘--no-sort’ Do not bother to sort the symbols in any order; print them in the order encountered. ‘-P’ ‘--portability’ Use the POSIX.2 standard output format instead of the default format. Equivalent to ‘-f posix’. ‘-r’ ‘--reverse-sort’ Reverse the order of the sort (whether numeric or alphabetic); let the last come first. ‘-S’ ‘--print-size’ Print both value and size of defined symbols for the ‘bsd’ output style. This option has no effect for object formats that do not record symbol sizes, unless ‘--size-sort’ is also used in which case a calculated size is displayed. ‘-s’ ‘--print-armap’ When listing symbols from archive members, include the index: a mapping (stored in the archive by ‘ar’ or ‘ranlib’) of which modules contain definitions for which names. ‘-t RADIX’ ‘--radix=RADIX’ Use RADIX as the radix for printing the symbol values. It must be ‘d’ for decimal, ‘o’ for octal, or ‘x’ for hexadecimal. ‘-u’ ‘--undefined-only’ Display only undefined symbols (those external to each object file). By default both defined and undefined symbols are displayed. ‘-U’ ‘--defined-only’ Display only defined symbols for each object file. By default both defined and undefined symbols are displayed. ‘-V’ ‘--version’ Show the version number of ‘nm’ and exit. ‘-X’ This option is ignored for compatibility with the AIX version of ‘nm’. It takes one parameter which must be the string ‘32_64’. The default mode of AIX ‘nm’ corresponds to ‘-X 32’, which is not supported by GNU ‘nm’. ‘--plugin NAME’ Load the plugin called NAME to add support for extra target types. This option is only available if the toolchain has been built with plugin support enabled. If ‘--plugin’ is not provided, but plugin support has been enabled then ‘nm’ iterates over the files in ‘${libdir}/bfd-plugins’ in alphabetic order and the first plugin that claims the object in question is used. Please note that this plugin search directory is _not_ the one used by ‘ld’’s ‘-plugin’ option. In order to make ‘nm’ use the linker plugin it must be copied into the ‘${libdir}/bfd-plugins’ directory. For GCC based compilations the linker plugin is called ‘liblto_plugin.so.0.0.0’. For Clang based compilations it is called ‘LLVMgold.so’. The GCC plugin is always backwards compatible with earlier versions, so it is sufficient to just copy the newest one. ‘--size-sort’ Sort symbols by size. For ELF objects symbol sizes are read from the ELF, for other object types the symbol sizes are computed as the difference between the value of the symbol and the value of the symbol with the next higher value. If the ‘bsd’ output format is used the size of the symbol is printed, rather than the value, and ‘-S’ must be used in order both size and value to be printed. Note - this option does not work if ‘--undefined-only’ has been enabled as undefined symbols have no size. ‘--special-syms’ Display symbols which have a target-specific special meaning. These symbols are usually used by the target for some special processing and are not normally helpful when included in the normal symbol lists. For example for ARM targets this option would skip the mapping symbols used to mark transitions between ARM code, THUMB code and data. ‘--synthetic’ Include synthetic symbols in the output. These are special symbols created by the linker for various purposes. They are not shown by default since they are not part of the binary’s original source code. ‘--unicode=[DEFAULT|INVALID|LOCALE|ESCAPE|HEX|HIGHLIGHT]’ Controls the display of UTF-8 encoded multibyte characters in strings. The default (‘--unicode=default’) is to give them no special treatment. The ‘--unicode=locale’ option displays the sequence in the current locale, which may or may not support them. The options ‘--unicode=hex’ and ‘--unicode=invalid’ display them as hex byte sequences enclosed by either angle brackets or curly braces. The ‘--unicode=escape’ option displays them as escape sequences (\UXXXX) and the ‘--unicode=highlight’ option displays them as escape sequences highlighted in red (if supported by the output device). The colouring is intended to draw attention to the presence of unicode sequences where they might not be expected. ‘-W’ ‘--no-weak’ Do not display weak symbols. ‘--with-symbol-versions’ ‘--without-symbol-versions’ Enables or disables the display of symbol version information. The version string is displayed as a suffix to the symbol name, preceded by an @ character. For example ‘foo@VER_1’. If the version is the default version to be used when resolving unversioned references to the symbol then it is displayed as a suffix preceded by two @ characters. For example ‘foo@@VER_2’. By default, symbol version information is displayed. ‘--target=BFDNAME’ Specify an object code format other than your system’s default format. *Note Target Selection::, for more information.  File: binutils.info, Node: objcopy, Next: objdump, Prev: nm, Up: Top 3 objcopy ********* objcopy [-F BFDNAME|--target=BFDNAME] [-I BFDNAME|--input-target=BFDNAME] [-O BFDNAME|--output-target=BFDNAME] [-B BFDARCH|--binary-architecture=BFDARCH] [-S|--strip-all] [-g|--strip-debug] [--strip-unneeded] [-K SYMBOLNAME|--keep-symbol=SYMBOLNAME] [--keep-file-symbols] [--keep-section-symbols] [-N SYMBOLNAME|--strip-symbol=SYMBOLNAME] [--strip-unneeded-symbol=SYMBOLNAME] [-G SYMBOLNAME|--keep-global-symbol=SYMBOLNAME] [--localize-hidden] [-L SYMBOLNAME|--localize-symbol=SYMBOLNAME] [--globalize-symbol=SYMBOLNAME] [--globalize-symbols=FILENAME] [-W SYMBOLNAME|--weaken-symbol=SYMBOLNAME] [-w|--wildcard] [-x|--discard-all] [-X|--discard-locals] [-b BYTE|--byte=BYTE] [-i [BREADTH]|--interleave[=BREADTH]] [--interleave-width=WIDTH] [-j SECTIONPATTERN|--only-section=SECTIONPATTERN] [-R SECTIONPATTERN|--remove-section=SECTIONPATTERN] [--keep-section=SECTIONPATTERN] [--remove-relocations=SECTIONPATTERN] [--strip-section-headers] [-p|--preserve-dates] [-D|--enable-deterministic-archives] [-U|--disable-deterministic-archives] [--debugging] [--gap-fill=VAL] [--pad-to=ADDRESS] [--set-start=VAL] [--adjust-start=INCR] [--change-addresses=INCR] [--change-section-address SECTIONPATTERN{=,+,-}VAL] [--change-section-lma SECTIONPATTERN{=,+,-}VAL] [--change-section-vma SECTIONPATTERN{=,+,-}VAL] [--change-warnings] [--no-change-warnings] [--set-section-flags SECTIONPATTERN=FLAGS] [--set-section-alignment SECTIONPATTERN=ALIGN] [--add-section SECTIONNAME=FILENAME] [--dump-section SECTIONNAME=FILENAME] [--update-section SECTIONNAME=FILENAME] [--rename-section OLDNAME=NEWNAME[,FLAGS]] [--long-section-names {enable,disable,keep}] [--change-leading-char] [--remove-leading-char] [--reverse-bytes=NUM] [--srec-len=IVAL] [--srec-forceS3] [--redefine-sym OLD=NEW] [--redefine-syms=FILENAME] [--weaken] [--keep-symbols=FILENAME] [--strip-symbols=FILENAME] [--strip-unneeded-symbols=FILENAME] [--keep-global-symbols=FILENAME] [--localize-symbols=FILENAME] [--weaken-symbols=FILENAME] [--add-symbol NAME=[SECTION:]VALUE[,FLAGS]] [--alt-machine-code=INDEX] [--prefix-symbols=STRING] [--prefix-sections=STRING] [--prefix-alloc-sections=STRING] [--add-gnu-debuglink=PATH-TO-FILE] [--only-keep-debug] [--strip-dwo] [--extract-dwo] [--extract-symbol] [--writable-text] [--readonly-text] [--pure] [--impure] [--file-alignment=NUM] [--heap=SIZE] [--image-base=ADDRESS] [--section-alignment=NUM] [--stack=SIZE] [--subsystem=WHICH:MAJOR.MINOR] [--compress-debug-sections] [--decompress-debug-sections] [--elf-stt-common=VAL] [--merge-notes] [--no-merge-notes] [--verilog-data-width=VAL] [-v|--verbose] [-V|--version] [--help] [--info] INFILE [OUTFILE] The GNU ‘objcopy’ utility copies the contents of an object file to another. ‘objcopy’ uses the GNU BFD Library to read and write the object files. It can write the destination object file in a format different from that of the source object file. The exact behavior of ‘objcopy’ is controlled by command-line options. Note that ‘objcopy’ should be able to copy a fully linked file between any two formats. However, copying a relocatable object file between any two formats may not work as expected. ‘objcopy’ creates temporary files to do its translations and deletes them afterward. ‘objcopy’ uses BFD to do all its translation work; it has access to all the formats described in BFD and thus is able to recognize most formats without being told explicitly. *Note BFD: (ld.info)BFD. ‘objcopy’ can be used to generate S-records by using an output target of ‘srec’ (e.g., use ‘-O srec’). ‘objcopy’ can be used to generate a raw binary file by using an output target of ‘binary’ (e.g., use ‘-O binary’). When ‘objcopy’ generates a raw binary file, it will essentially produce a memory dump of the contents of the input object file. All symbols and relocation information will be discarded. The memory dump will start at the load address of the lowest section copied into the output file. When generating an S-record or a raw binary file, it may be helpful to use ‘-S’ to remove sections containing debugging information. In some cases ‘-R’ will be useful to remove sections which contain information that is not needed by the binary file. Note—‘objcopy’ is not able to change the endianness of its input files. If the input format has an endianness (some formats do not), ‘objcopy’ can only copy the inputs into file formats that have the same endianness or which have no endianness (e.g., ‘srec’). (However, see the ‘--reverse-bytes’ option.) ‘INFILE’ ‘OUTFILE’ The input and output files, respectively. If you do not specify OUTFILE, ‘objcopy’ creates a temporary file and destructively renames the result with the name of INFILE. ‘-I BFDNAME’ ‘--input-target=BFDNAME’ Consider the source file’s object format to be BFDNAME, rather than attempting to deduce it. *Note Target Selection::, for more information. ‘-O BFDNAME’ ‘--output-target=BFDNAME’ Write the output file using the object format BFDNAME. *Note Target Selection::, for more information. ‘-F BFDNAME’ ‘--target=BFDNAME’ Use BFDNAME as the object format for both the input and the output file; i.e., simply transfer data from source to destination with no translation. *Note Target Selection::, for more information. ‘-B BFDARCH’ ‘--binary-architecture=BFDARCH’ Useful when transforming a architecture-less input file into an object file. In this case the output architecture can be set to BFDARCH. This option will be ignored if the input file has a known BFDARCH. You can access this binary data inside a program by referencing the special symbols that are created by the conversion process. These symbols are called _binary_OBJFILE_start, _binary_OBJFILE_end and _binary_OBJFILE_size. e.g. you can transform a picture file into an object file and then access it in your code using these symbols. ‘-j SECTIONPATTERN’ ‘--only-section=SECTIONPATTERN’ Copy only the indicated sections from the input file to the output file. This option may be given more than once. Note that using this option inappropriately may make the output file unusable. Wildcard characters are accepted in SECTIONPATTERN. If the first character of SECTIONPATTERN is the exclamation point (!) then matching sections will not be copied, even if earlier use of ‘--only-section’ on the same command line would otherwise copy it. For example: --only-section=.text.* --only-section=!.text.foo will copy all sectinos matching ’.text.*’ but not the section ’.text.foo’. ‘-R SECTIONPATTERN’ ‘--remove-section=SECTIONPATTERN’ Remove any section matching SECTIONPATTERN from the output file. This option may be given more than once. Note that using this option inappropriately may make the output file unusable. Wildcard characters are accepted in SECTIONPATTERN. Using both the ‘-j’ and ‘-R’ options together results in undefined behaviour. If the first character of SECTIONPATTERN is the exclamation point (!) then matching sections will not be removed even if an earlier use of ‘--remove-section’ on the same command line would otherwise remove it. For example: --remove-section=.text.* --remove-section=!.text.foo will remove all sections matching the pattern ’.text.*’, but will not remove the section ’.text.foo’. ‘--keep-section=SECTIONPATTERN’ When removing sections from the output file, keep sections that match SECTIONPATTERN. ‘--remove-relocations=SECTIONPATTERN’ Remove non-dynamic relocations from the output file for any section matching SECTIONPATTERN. This option may be given more than once. Note that using this option inappropriately may make the output file unusable, and attempting to remove a dynamic relocation section such as ‘.rela.plt’ from an executable or shared library with ‘--remove-relocations=.plt’ will not work. Wildcard characters are accepted in SECTIONPATTERN. For example: --remove-relocations=.text.* will remove the relocations for all sections matching the pattern ’.text.*’. If the first character of SECTIONPATTERN is the exclamation point (!) then matching sections will not have their relocation removed even if an earlier use of ‘--remove-relocations’ on the same command line would otherwise cause the relocations to be removed. For example: --remove-relocations=.text.* --remove-relocations=!.text.foo will remove all relocations for sections matching the pattern ’.text.*’, but will not remove relocations for the section ’.text.foo’. ‘--strip-section-headers’ Strip section header This option is specific to ELF files. Implies ‘--strip-all’ and ‘--merge-notes’. ‘-S’ ‘--strip-all’ Do not copy relocation and symbol information from the source file. Also deletes debug sections. ‘-g’ ‘--strip-debug’ Do not copy debugging symbols or sections from the source file. ‘--strip-unneeded’ Remove all symbols that are not needed for relocation processing in addition to debugging symbols and sections stripped by ‘--strip-debug’. ‘-K SYMBOLNAME’ ‘--keep-symbol=SYMBOLNAME’ When stripping symbols, keep symbol SYMBOLNAME even if it would normally be stripped. This option may be given more than once. ‘-N SYMBOLNAME’ ‘--strip-symbol=SYMBOLNAME’ Do not copy symbol SYMBOLNAME from the source file. This option may be given more than once. ‘--strip-unneeded-symbol=SYMBOLNAME’ Do not copy symbol SYMBOLNAME from the source file unless it is needed by a relocation. This option may be given more than once. ‘-G SYMBOLNAME’ ‘--keep-global-symbol=SYMBOLNAME’ Keep only symbol SYMBOLNAME global. Make all other symbols local to the file, so that they are not visible externally. This option may be given more than once. Note: this option cannot be used in conjunction with the ‘--globalize-symbol’ or ‘--globalize-symbols’ options. ‘--localize-hidden’ In an ELF object, mark all symbols that have hidden or internal visibility as local. This option applies on top of symbol-specific localization options such as ‘-L’. ‘-L SYMBOLNAME’ ‘--localize-symbol=SYMBOLNAME’ Convert a global or weak symbol called SYMBOLNAME into a local symbol, so that it is not visible externally. This option may be given more than once. Note - unique symbols are not converted. ‘-W SYMBOLNAME’ ‘--weaken-symbol=SYMBOLNAME’ Make symbol SYMBOLNAME weak. This option may be given more than once. ‘--globalize-symbol=SYMBOLNAME’ Give symbol SYMBOLNAME global scoping so that it is visible outside of the file in which it is defined. This option may be given more than once. Note: this option cannot be used in conjunction with the ‘-G’ or ‘--keep-global-symbol’ options. ‘-w’ ‘--wildcard’ Permit regular expressions in SYMBOLNAMEs used in other command line options. The question mark (?), asterisk (*), backslash (\) and square brackets ([]) operators can be used anywhere in the symbol name. If the first character of the symbol name is the exclamation point (!) then the sense of the switch is reversed for that symbol. For example: -w -W !foo -W fo* would cause objcopy to weaken all symbols that start with “fo” except for the symbol “foo”. ‘-x’ ‘--discard-all’ Do not copy non-global symbols from the source file. ‘-X’ ‘--discard-locals’ Do not copy compiler-generated local symbols. (These usually start with ‘L’ or ‘.’.) ‘-b BYTE’ ‘--byte=BYTE’ If interleaving has been enabled via the ‘--interleave’ option then start the range of bytes to keep at the BYTEth byte. BYTE can be in the range from 0 to BREADTH-1, where BREADTH is the value given by the ‘--interleave’ option. ‘-i [BREADTH]’ ‘--interleave[=BREADTH]’ Only copy a range out of every BREADTH bytes. (Header data is not affected). Select which byte in the range begins the copy with the ‘--byte’ option. Select the width of the range with the ‘--interleave-width’ option. This option is useful for creating files to program ROM. It is typically used with an ‘srec’ output target. Note that ‘objcopy’ will complain if you do not specify the ‘--byte’ option as well. The default interleave breadth is 4, so with ‘--byte’ set to 0, ‘objcopy’ would copy the first byte out of every four bytes from the input to the output. ‘--interleave-width=WIDTH’ When used with the ‘--interleave’ option, copy WIDTH bytes at a time. The start of the range of bytes to be copied is set by the ‘--byte’ option, and the extent of the range is set with the ‘--interleave’ option. The default value for this option is 1. The value of WIDTH plus the BYTE value set by the ‘--byte’ option must not exceed the interleave breadth set by the ‘--interleave’ option. This option can be used to create images for two 16-bit flashes interleaved in a 32-bit bus by passing ‘-b 0 -i 4 --interleave-width=2’ and ‘-b 2 -i 4 --interleave-width=2’ to two ‘objcopy’ commands. If the input was ’12345678’ then the outputs would be ’1256’ and ’3478’ respectively. ‘-p’ ‘--preserve-dates’ Set the access and modification dates of the output file to be the same as those of the input file. ‘-D’ ‘--enable-deterministic-archives’ Operate in _deterministic_ mode. When copying archive members and writing the archive index, use zero for UIDs, GIDs, timestamps, and use consistent file modes for all files. If ‘binutils’ was configured with ‘--enable-deterministic-archives’, then this mode is on by default. It can be disabled with the ‘-U’ option, below. ‘-U’ ‘--disable-deterministic-archives’ Do _not_ operate in _deterministic_ mode. This is the inverse of the ‘-D’ option, above: when copying archive members and writing the archive index, use their actual UID, GID, timestamp, and file mode values. This is the default unless ‘binutils’ was configured with ‘--enable-deterministic-archives’. ‘--debugging’ Convert debugging information, if possible. This is not the default because only certain debugging formats are supported, and the conversion process can be time consuming. ‘--gap-fill VAL’ Fill gaps between sections with VAL. This operation applies to the _load address_ (LMA) of the sections. It is done by increasing the size of the section with the lower address, and filling in the extra space created with VAL. ‘--pad-to ADDRESS’ Pad the output file up to the load address ADDRESS. This is done by increasing the size of the last section. The extra space is filled in with the value specified by ‘--gap-fill’ (default zero). ‘--set-start VAL’ Set the start address (also known as the entry address) of the new file to VAL. Not all object file formats support setting the start address. ‘--change-start INCR’ ‘--adjust-start INCR’ Change the start address (also known as the entry address) by adding INCR. Not all object file formats support setting the start address. ‘--change-addresses INCR’ ‘--adjust-vma INCR’ Change the VMA and LMA addresses of all sections, as well as the start address, by adding INCR. Some object file formats do not permit section addresses to be changed arbitrarily. Note that this does not relocate the sections; if the program expects sections to be loaded at a certain address, and this option is used to change the sections such that they are loaded at a different address, the program may fail. ‘--change-section-address SECTIONPATTERN{=,+,-}VAL’ ‘--adjust-section-vma SECTIONPATTERN{=,+,-}VAL’ Set or change both the VMA address and the LMA address of any section matching SECTIONPATTERN. If ‘=’ is used, the section address is set to VAL. Otherwise, VAL is added to or subtracted from the section address. See the comments under ‘--change-addresses’, above. If SECTIONPATTERN does not match any sections in the input file, a warning will be issued, unless ‘--no-change-warnings’ is used. ‘--change-section-lma SECTIONPATTERN{=,+,-}VAL’ Set or change the LMA address of any sections matching SECTIONPATTERN. The LMA address is the address where the section will be loaded into memory at program load time. Normally this is the same as the VMA address, which is the address of the section at program run time, but on some systems, especially those where a program is held in ROM, the two can be different. If ‘=’ is used, the section address is set to VAL. Otherwise, VAL is added to or subtracted from the section address. See the comments under ‘--change-addresses’, above. If SECTIONPATTERN does not match any sections in the input file, a warning will be issued, unless ‘--no-change-warnings’ is used. ‘--change-section-vma SECTIONPATTERN{=,+,-}VAL’ Set or change the VMA address of any section matching SECTIONPATTERN. The VMA address is the address where the section will be located once the program has started executing. Normally this is the same as the LMA address, which is the address where the section will be loaded into memory, but on some systems, especially those where a program is held in ROM, the two can be different. If ‘=’ is used, the section address is set to VAL. Otherwise, VAL is added to or subtracted from the section address. See the comments under ‘--change-addresses’, above. If SECTIONPATTERN does not match any sections in the input file, a warning will be issued, unless ‘--no-change-warnings’ is used. ‘--change-warnings’ ‘--adjust-warnings’ If ‘--change-section-address’ or ‘--change-section-lma’ or ‘--change-section-vma’ is used, and the section pattern does not match any sections, issue a warning. This is the default. ‘--no-change-warnings’ ‘--no-adjust-warnings’ Do not issue a warning if ‘--change-section-address’ or ‘--adjust-section-lma’ or ‘--adjust-section-vma’ is used, even if the section pattern does not match any sections. ‘--set-section-flags SECTIONPATTERN=FLAGS’ Set the flags for any sections matching SECTIONPATTERN. The FLAGS argument is a comma separated string of flag names. The recognized names are ‘alloc’, ‘contents’, ‘load’, ‘noload’, ‘readonly’, ‘code’, ‘data’, ‘rom’, ‘exclude’, ‘share’, and ‘debug’. You can set the ‘contents’ flag for a section which does not have contents, but it is not meaningful to clear the ‘contents’ flag of a section which does have contents–just remove the section instead. Not all flags are meaningful for all object file formats. In particular the ‘share’ flag is only meaningful for COFF format files and not for ELF format files. ‘--set-section-alignment SECTIONPATTERN=ALIGN’ Set the alignment for any sections matching SECTIONPATTERN. ALIGN specifies the alignment in bytes and must be a power of two, i.e. 1, 2, 4, 8.... ‘--add-section SECTIONNAME=FILENAME’ Add a new section named SECTIONNAME while copying the file. The contents of the new section are taken from the file FILENAME. The size of the section will be the size of the file. This option only works on file formats which can support sections with arbitrary names. Note - it may be necessary to use the ‘--set-section-flags’ option to set the attributes of the newly created section. ‘--dump-section SECTIONNAME=FILENAME’ Place the contents of section named SECTIONNAME into the file FILENAME, overwriting any contents that may have been there previously. This option is the inverse of ‘--add-section’. This option is similar to the ‘--only-section’ option except that it does not create a formatted file, it just dumps the contents as raw binary data, without applying any relocations. The option can be specified more than once. ‘--update-section SECTIONNAME=FILENAME’ Replace the existing contents of a section named SECTIONNAME with the contents of file FILENAME. The size of the section will be adjusted to the size of the file. The section flags for SECTIONNAME will be unchanged. For ELF format files the section to segment mapping will also remain unchanged, something which is not possible using ‘--remove-section’ followed by ‘--add-section’. The option can be specified more than once. Note - it is possible to use ‘--rename-section’ and ‘--update-section’ to both update and rename a section from one command line. In this case, pass the original section name to ‘--update-section’, and the original and new section names to ‘--rename-section’. ‘--add-symbol NAME=[SECTION:]VALUE[,FLAGS]’ Add a new symbol named NAME while copying the file. This option may be specified multiple times. If the SECTION is given, the symbol will be associated with and relative to that section, otherwise it will be an ABS symbol. Specifying an undefined section will result in a fatal error. There is no check for the value, it will be taken as specified. Symbol flags can be specified and not all flags will be meaningful for all object file formats. By default, the symbol will be global. The special flag ’before=OTHERSYM’ will insert the new symbol in front of the specified OTHERSYM, otherwise the symbol(s) will be added at the end of the symbol table in the order they appear. ‘--rename-section OLDNAME=NEWNAME[,FLAGS]’ Rename a section from OLDNAME to NEWNAME, optionally changing the section’s flags to FLAGS in the process. This has the advantage over using a linker script to perform the rename in that the output stays as an object file and does not become a linked executable. This option accepts the same set of flags as the ‘--sect-section-flags’ option. This option is particularly helpful when the input format is binary, since this will always create a section called .data. If for example, you wanted instead to create a section called .rodata containing binary data you could use the following command line to achieve it: objcopy -I binary -O -B \ --rename-section .data=.rodata,alloc,load,readonly,data,contents \ ‘--long-section-names {enable,disable,keep}’ Controls the handling of long section names when processing ‘COFF’ and ‘PE-COFF’ object formats. The default behaviour, ‘keep’, is to preserve long section names if any are present in the input file. The ‘enable’ and ‘disable’ options forcibly enable or disable the use of long section names in the output object; when ‘disable’ is in effect, any long section names in the input object will be truncated. The ‘enable’ option will only emit long section names if any are present in the inputs; this is mostly the same as ‘keep’, but it is left undefined whether the ‘enable’ option might force the creation of an empty string table in the output file. ‘--change-leading-char’ Some object file formats use special characters at the start of symbols. The most common such character is underscore, which compilers often add before every symbol. This option tells ‘objcopy’ to change the leading character of every symbol when it converts between object file formats. If the object file formats use the same leading character, this option has no effect. Otherwise, it will add a character, or remove a character, or change a character, as appropriate. ‘--remove-leading-char’ If the first character of a global symbol is a special symbol leading character used by the object file format, remove the character. The most common symbol leading character is underscore. This option will remove a leading underscore from all global symbols. This can be useful if you want to link together objects of different file formats with different conventions for symbol names. This is different from ‘--change-leading-char’ because it always changes the symbol name when appropriate, regardless of the object file format of the output file. ‘--reverse-bytes=NUM’ Reverse the bytes in a section with output contents. A section length must be evenly divisible by the value given in order for the swap to be able to take place. Reversing takes place before the interleaving is performed. This option is used typically in generating ROM images for problematic target systems. For example, on some target boards, the 32-bit words fetched from 8-bit ROMs are re-assembled in little-endian byte order regardless of the CPU byte order. Depending on the programming model, the endianness of the ROM may need to be modified. Consider a simple file with a section containing the following eight bytes: ‘12345678’. Using ‘--reverse-bytes=2’ for the above example, the bytes in the output file would be ordered ‘21436587’. Using ‘--reverse-bytes=4’ for the above example, the bytes in the output file would be ordered ‘43218765’. By using ‘--reverse-bytes=2’ for the above example, followed by ‘--reverse-bytes=4’ on the output file, the bytes in the second output file would be ordered ‘34127856’. ‘--srec-len=IVAL’ Meaningful only for srec output. Set the maximum length of the Srecords being produced to IVAL. This length covers both address, data and crc fields. ‘--srec-forceS3’ Meaningful only for srec output. Avoid generation of S1/S2 records, creating S3-only record format. ‘--redefine-sym OLD=NEW’ Change the name of a symbol OLD, to NEW. This can be useful when one is trying link two things together for which you have no source, and there are name collisions. ‘--redefine-syms=FILENAME’ Apply ‘--redefine-sym’ to each symbol pair "OLD NEW" listed in the file FILENAME. FILENAME is simply a flat file, with one symbol pair per line. Line comments may be introduced by the hash character. This option may be given more than once. ‘--weaken’ Change all global symbols in the file to be weak. This can be useful when building an object which will be linked against other objects using the ‘-R’ option to the linker. This option is only effective when using an object file format which supports weak symbols. ‘--keep-symbols=FILENAME’ Apply ‘--keep-symbol’ option to each symbol listed in the file FILENAME. FILENAME is simply a flat file, with one symbol name per line. Line comments may be introduced by the hash character. This option may be given more than once. ‘--strip-symbols=FILENAME’ Apply ‘--strip-symbol’ option to each symbol listed in the file FILENAME. FILENAME is simply a flat file, with one symbol name per line. Line comments may be introduced by the hash character. This option may be given more than once. ‘--strip-unneeded-symbols=FILENAME’ Apply ‘--strip-unneeded-symbol’ option to each symbol listed in the file FILENAME. FILENAME is simply a flat file, with one symbol name per line. Line comments may be introduced by the hash character. This option may be given more than once. ‘--keep-global-symbols=FILENAME’ Apply ‘--keep-global-symbol’ option to each symbol listed in the file FILENAME. FILENAME is simply a flat file, with one symbol name per line. Line comments may be introduced by the hash character. This option may be given more than once. ‘--localize-symbols=FILENAME’ Apply ‘--localize-symbol’ option to each symbol listed in the file FILENAME. FILENAME is simply a flat file, with one symbol name per line. Line comments may be introduced by the hash character. This option may be given more than once. ‘--globalize-symbols=FILENAME’ Apply ‘--globalize-symbol’ option to each symbol listed in the file FILENAME. FILENAME is simply a flat file, with one symbol name per line. Line comments may be introduced by the hash character. This option may be given more than once. Note: this option cannot be used in conjunction with the ‘-G’ or ‘--keep-global-symbol’ options. ‘--weaken-symbols=FILENAME’ Apply ‘--weaken-symbol’ option to each symbol listed in the file FILENAME. FILENAME is simply a flat file, with one symbol name per line. Line comments may be introduced by the hash character. This option may be given more than once. ‘--alt-machine-code=INDEX’ If the output architecture has alternate machine codes, use the INDEXth code instead of the default one. This is useful in case a machine is assigned an official code and the tool-chain adopts the new code, but other applications still depend on the original code being used. For ELF based architectures if the INDEX alternative does not exist then the value is treated as an absolute number to be stored in the e_machine field of the ELF header. ‘--writable-text’ Mark the output text as writable. This option isn’t meaningful for all object file formats. ‘--readonly-text’ Make the output text write protected. This option isn’t meaningful for all object file formats. ‘--pure’ Mark the output file as demand paged. This option isn’t meaningful for all object file formats. ‘--impure’ Mark the output file as impure. This option isn’t meaningful for all object file formats. ‘--prefix-symbols=STRING’ Prefix all symbols in the output file with STRING. ‘--prefix-sections=STRING’ Prefix all section names in the output file with STRING. ‘--prefix-alloc-sections=STRING’ Prefix all the names of all allocated sections in the output file with STRING. ‘--add-gnu-debuglink=PATH-TO-FILE’ Creates a .gnu_debuglink section which contains a reference to PATH-TO-FILE and adds it to the output file. Note: the file at PATH-TO-FILE must exist. Part of the process of adding the .gnu_debuglink section involves embedding a checksum of the contents of the debug info file into the section. If the debug info file is built in one location but it is going to be installed at a later time into a different location then do not use the path to the installed location. The ‘--add-gnu-debuglink’ option will fail because the installed file does not exist yet. Instead put the debug info file in the current directory and use the ‘--add-gnu-debuglink’ option without any directory components, like this: objcopy --add-gnu-debuglink=foo.debug At debug time the debugger will attempt to look for the separate debug info file in a set of known locations. The exact set of these locations varies depending upon the distribution being used, but it typically includes: ‘* The same directory as the executable.’ ‘* A sub-directory of the directory containing the executable’ called .debug ‘* A global debug directory such as /usr/lib/debug.’ As long as the debug info file has been installed into one of these locations before the debugger is run everything should work correctly. ‘--keep-section-symbils’ When stripping a file, perhaps with ‘--strip-debug’ or ‘--strip-unneeded’, retain any symbols specifying section names, which would otherwise get stripped. ‘--keep-file-symbols’ When stripping a file, perhaps with ‘--strip-debug’ or ‘--strip-unneeded’, retain any symbols specifying source file names, which would otherwise get stripped. ‘--only-keep-debug’ Strip a file, removing contents of any sections that would not be stripped by ‘--strip-debug’ and leaving the debugging sections intact. In ELF files, this preserves all note sections in the output. Note - the section headers of the stripped sections are preserved, including their sizes, but the contents of the section are discarded. The section headers are preserved so that other tools can match up the debuginfo file with the real executable, even if that executable has been relocated to a different address space. The intention is that this option will be used in conjunction with ‘--add-gnu-debuglink’ to create a two part executable. One a stripped binary which will occupy less space in RAM and in a distribution and the second a debugging information file which is only needed if debugging abilities are required. The suggested procedure to create these files is as follows: 1. Link the executable as normal. Assuming that it is called ‘foo’ then... 2. Run ‘objcopy --only-keep-debug foo foo.dbg’ to create a file containing the debugging info. 3. Run ‘objcopy --strip-debug foo’ to create a stripped executable. 4. Run ‘objcopy --add-gnu-debuglink=foo.dbg foo’ to add a link to the debugging info into the stripped executable. Note—the choice of ‘.dbg’ as an extension for the debug info file is arbitrary. Also the ‘--only-keep-debug’ step is optional. You could instead do this: 1. Link the executable as normal. 2. Copy ‘foo’ to ‘foo.full’ 3. Run ‘objcopy --strip-debug foo’ 4. Run ‘objcopy --add-gnu-debuglink=foo.full foo’ i.e., the file pointed to by the ‘--add-gnu-debuglink’ can be the full executable. It does not have to be a file created by the ‘--only-keep-debug’ switch. Note—this switch is only intended for use on fully linked files. It does not make sense to use it on object files where the debugging information may be incomplete. Besides the gnu_debuglink feature currently only supports the presence of one filename containing debugging information, not multiple filenames on a one-per-object-file basis. ‘--strip-dwo’ Remove the contents of all DWARF .dwo sections, leaving the remaining debugging sections and all symbols intact. This option is intended for use by the compiler as part of the ‘-gsplit-dwarf’ option, which splits debug information between the .o file and a separate .dwo file. The compiler generates all debug information in the same file, then uses the ‘--extract-dwo’ option to copy the .dwo sections to the .dwo file, then the ‘--strip-dwo’ option to remove those sections from the original .o file. ‘--extract-dwo’ Extract the contents of all DWARF .dwo sections. See the ‘--strip-dwo’ option for more information. ‘--file-alignment NUM’ Specify the file alignment. Sections in the file will always begin at file offsets which are multiples of this number. This defaults to 512. [This option is specific to PE targets.] ‘--heap RESERVE’ ‘--heap RESERVE,COMMIT’ Specify the number of bytes of memory to reserve (and optionally commit) to be used as heap for this program. [This option is specific to PE targets.] ‘--image-base VALUE’ Use VALUE as the base address of your program or dll. This is the lowest memory location that will be used when your program or dll is loaded. To reduce the need to relocate and improve performance of your dlls, each should have a unique base address and not overlap any other dlls. The default is 0x400000 for executables, and 0x10000000 for dlls. [This option is specific to PE targets.] ‘--section-alignment NUM’ Sets the section alignment field in the PE header. Sections in memory will always begin at addresses which are a multiple of this number. Defaults to 0x1000. [This option is specific to PE targets.] ‘--stack RESERVE’ ‘--stack RESERVE,COMMIT’ Specify the number of bytes of memory to reserve (and optionally commit) to be used as stack for this program. [This option is specific to PE targets.] ‘--subsystem WHICH’ ‘--subsystem WHICH:MAJOR’ ‘--subsystem WHICH:MAJOR.MINOR’ Specifies the subsystem under which your program will execute. The legal values for WHICH are ‘native’, ‘windows’, ‘console’, ‘posix’, ‘efi-app’, ‘efi-bsd’, ‘efi-rtd’, ‘sal-rtd’, and ‘xbox’. You may optionally set the subsystem version also. Numeric values are also accepted for WHICH. [This option is specific to PE targets.] ‘--extract-symbol’ Keep the file’s section flags and symbols but remove all section data. Specifically, the option: • removes the contents of all sections; • sets the size of every section to zero; and • sets the file’s start address to zero. This option is used to build a ‘.sym’ file for a VxWorks kernel. It can also be a useful way of reducing the size of a ‘--just-symbols’ linker input file. ‘--compress-debug-sections’ Compress DWARF debug sections using zlib with SHF_COMPRESSED from the ELF ABI. Note - if compression would actually make a section _larger_, then it is not compressed. ‘--compress-debug-sections=none’ ‘--compress-debug-sections=zlib’ ‘--compress-debug-sections=zlib-gnu’ ‘--compress-debug-sections=zlib-gabi’ ‘--compress-debug-sections=zstd’ For ELF files, these options control how DWARF debug sections are compressed. ‘--compress-debug-sections=none’ is equivalent to ‘--decompress-debug-sections’. ‘--compress-debug-sections=zlib’ and ‘--compress-debug-sections=zlib-gabi’ are equivalent to ‘--compress-debug-sections’. ‘--compress-debug-sections=zlib-gnu’ compresses DWARF debug sections using the obsoleted zlib-gnu format. The debug sections are renamed to begin with ‘.zdebug’. ‘--compress-debug-sections=zstd’ compresses DWARF debug sections using zstd. Note - if compression would actually make a section _larger_, then it is not compressed nor renamed. ‘--decompress-debug-sections’ Decompress DWARF debug sections. For a ‘.zdebug’ section, the original name is restored. ‘--elf-stt-common=yes’ ‘--elf-stt-common=no’ For ELF files, these options control whether common symbols should be converted to the ‘STT_COMMON’ or ‘STT_OBJECT’ type. ‘--elf-stt-common=yes’ converts common symbol type to ‘STT_COMMON’. ‘--elf-stt-common=no’ converts common symbol type to ‘STT_OBJECT’. ‘--merge-notes’ ‘--no-merge-notes’ For ELF files, attempt (or do not attempt) to reduce the size of any SHT_NOTE type sections by removing duplicate notes. ‘-V’ ‘--version’ Show the version number of ‘objcopy’. ‘--verilog-data-width=BYTES’ For Verilog output, this options controls the number of bytes converted for each output data element. The input target controls the endianness of the conversion. ‘-v’ ‘--verbose’ Verbose output: list all object files modified. In the case of archives, ‘objcopy -V’ lists all members of the archive. ‘--help’ Show a summary of the options to ‘objcopy’. ‘--info’ Display a list showing all architectures and object formats available.  File: binutils.info, Node: objdump, Next: ranlib, Prev: objcopy, Up: Top 4 objdump ********* objdump [-a|--archive-headers] [-b BFDNAME|--target=BFDNAME] [-C|--demangle[=STYLE] ] [-d|--disassemble[=SYMBOL]] [-D|--disassemble-all] [-z|--disassemble-zeroes] [-EB|-EL|--endian={big | little }] [-f|--file-headers] [-F|--file-offsets] [--file-start-context] [-g|--debugging] [-e|--debugging-tags] [-h|--section-headers|--headers] [-i|--info] [-j SECTION|--section=SECTION] [-l|--line-numbers] [-S|--source] [--source-comment[=TEXT]] [-m MACHINE|--architecture=MACHINE] [-M OPTIONS|--disassembler-options=OPTIONS] [-p|--private-headers] [-P OPTIONS|--private=OPTIONS] [-r|--reloc] [-R|--dynamic-reloc] [-s|--full-contents] [-W[lLiaprmfFsoORtUuTgAck]| --dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=str-offsets,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links]] [-WK|--dwarf=follow-links] [-WN|--dwarf=no-follow-links] [-wD|--dwarf=use-debuginfod] [-wE|--dwarf=do-not-use-debuginfod] [-L|--process-links] [--ctf=SECTION] [--sframe=SECTION] [-G|--stabs] [-t|--syms] [-T|--dynamic-syms] [-x|--all-headers] [-w|--wide] [--start-address=ADDRESS] [--stop-address=ADDRESS] [--no-addresses] [--prefix-addresses] [--[no-]show-raw-insn] [--adjust-vma=OFFSET] [--show-all-symbols] [--dwarf-depth=N] [--dwarf-start=N] [--ctf-parent=SECTION] [--no-recurse-limit|--recurse-limit] [--special-syms] [--prefix=PREFIX] [--prefix-strip=LEVEL] [--insn-width=WIDTH] [--visualize-jumps[=color|=extended-color|=off] [--disassembler-color=[off|terminal|on|extended] [-U METHOD] [--unicode=METHOD] [-V|--version] [-H|--help] OBJFILE... ‘objdump’ displays information about one or more object files. The options control what particular information to display. This information is mostly useful to programmers who are working on the compilation tools, as opposed to programmers who just want their program to compile and work. OBJFILE... are the object files to be examined. When you specify archives, ‘objdump’ shows information on each of the member object files. The long and short forms of options, shown here as alternatives, are equivalent. At least one option from the list ‘-a,-d,-D,-e,-f,-g,-G,-h,-H,-p,-P,-r,-R,-s,-S,-t,-T,-V,-x’ must be given. ‘-a’ ‘--archive-header’ If any of the OBJFILE files are archives, display the archive header information (in a format similar to ‘ls -l’). Besides the information you could list with ‘ar tv’, ‘objdump -a’ shows the object file format of each archive member. ‘--adjust-vma=OFFSET’ When dumping information, first add OFFSET to all the section addresses. This is useful if the section addresses do not correspond to the symbol table, which can happen when putting sections at particular addresses when using a format which can not represent section addresses, such as a.out. ‘-b BFDNAME’ ‘--target=BFDNAME’ Specify that the object-code format for the object files is BFDNAME. This option may not be necessary; OBJDUMP can automatically recognize many formats. For example, objdump -b oasys -m vax -h fu.o displays summary information from the section headers (‘-h’) of ‘fu.o’, which is explicitly identified (‘-m’) as a VAX object file in the format produced by Oasys compilers. You can list the formats available with the ‘-i’ option. *Note Target Selection::, for more information. ‘-C’ ‘--demangle[=STYLE]’ Decode (“demangle”) low-level symbol names into user-level names. Besides removing any initial underscore prepended by the system, this makes C++ function names readable. Different compilers have different mangling styles. The optional demangling style argument can be used to choose an appropriate demangling style for your compiler. *Note c++filt::, for more information on demangling. ‘--recurse-limit’ ‘--no-recurse-limit’ ‘--recursion-limit’ ‘--no-recursion-limit’ Enables or disables a limit on the amount of recursion performed whilst demangling strings. Since the name mangling formats allow for an infinite level of recursion it is possible to create strings whose decoding will exhaust the amount of stack space available on the host machine, triggering a memory fault. The limit tries to prevent this from happening by restricting recursion to 2048 levels of nesting. The default is for this limit to be enabled, but disabling it may be necessary in order to demangle truly complicated names. Note however that if the recursion limit is disabled then stack exhaustion is possible and any bug reports about such an event will be rejected. ‘-g’ ‘--debugging’ Display debugging information. This attempts to parse STABS debugging format information stored in the file and print it out using a C like syntax. If no STABS debugging was found this option falls back on the ‘-W’ option to print any DWARF information in the file. ‘-e’ ‘--debugging-tags’ Like ‘-g’, but the information is generated in a format compatible with ctags tool. ‘-d’ ‘--disassemble’ ‘--disassemble=SYMBOL’ Display the assembler mnemonics for the machine instructions from the input file. This option only disassembles those sections which are expected to contain instructions. If the optional SYMBOL argument is given, then display the assembler mnemonics starting at SYMBOL. If SYMBOL is a function name then disassembly will stop at the end of the function, otherwise it will stop when the next symbol is encountered. If there are no matches for SYMBOL then nothing will be displayed. Note if the ‘--dwarf=follow-links’ option is enabled then any symbol tables in linked debug info files will be read in and used when disassembling. ‘-D’ ‘--disassemble-all’ Like ‘-d’, but disassemble the contents of all non-empty non-bss sections, not just those expected to contain instructions. ‘-j’ may be used to select specific sections. This option also has a subtle effect on the disassembly of instructions in code sections. When option ‘-d’ is in effect objdump will assume that any symbols present in a code section occur on the boundary between instructions and it will refuse to disassemble across such a boundary. When option ‘-D’ is in effect however this assumption is supressed. This means that it is possible for the output of ‘-d’ and ‘-D’ to differ if, for example, data is stored in code sections. If the target is an ARM architecture this switch also has the effect of forcing the disassembler to decode pieces of data found in code sections as if they were instructions. Note if the ‘--dwarf=follow-links’ option is enabled then any symbol tables in linked debug info files will be read in and used when disassembling. ‘--no-addresses’ When disassembling, don’t print addresses on each line or for symbols and relocation offsets. In combination with ‘--no-show-raw-insn’ this may be useful for comparing compiler output. ‘--prefix-addresses’ When disassembling, print the complete address on each line. This is the older disassembly format. ‘-EB’ ‘-EL’ ‘--endian={big|little}’ Specify the endianness of the object files. This only affects disassembly. This can be useful when disassembling a file format which does not describe endianness information, such as S-records. ‘-f’ ‘--file-headers’ Display summary information from the overall header of each of the OBJFILE files. ‘-F’ ‘--file-offsets’ When disassembling sections, whenever a symbol is displayed, also display the file offset of the region of data that is about to be dumped. If zeroes are being skipped, then when disassembly resumes, tell the user how many zeroes were skipped and the file offset of the location from where the disassembly resumes. When dumping sections, display the file offset of the location from where the dump starts. ‘--file-start-context’ Specify that when displaying interlisted source code/disassembly (assumes ‘-S’) from a file that has not yet been displayed, extend the context to the start of the file. ‘-h’ ‘--section-headers’ ‘--headers’ Display summary information from the section headers of the object file. File segments may be relocated to nonstandard addresses, for example by using the ‘-Ttext’, ‘-Tdata’, or ‘-Tbss’ options to ‘ld’. However, some object file formats, such as a.out, do not store the starting address of the file segments. In those situations, although ‘ld’ relocates the sections correctly, using ‘objdump -h’ to list the file section headers cannot show the correct addresses. Instead, it shows the usual addresses, which are implicit for the target. Note, in some cases it is possible for a section to have both the READONLY and the NOREAD attributes set. In such cases the NOREAD attribute takes precedence, but ‘objdump’ will report both since the exact setting of the flag bits might be important. ‘-H’ ‘--help’ Print a summary of the options to ‘objdump’ and exit. ‘-i’ ‘--info’ Display a list showing all architectures and object formats available for specification with ‘-b’ or ‘-m’. ‘-j NAME’ ‘--section=NAME’ Display information for section NAME. This option may be specified multiple times. ‘-L’ ‘--process-links’ Display the contents of non-debug sections found in separate debuginfo files that are linked to the main file. This option automatically implies the ‘-WK’ option, and only sections requested by other command line options will be displayed. ‘-l’ ‘--line-numbers’ Label the display (using debugging information) with the filename and source line numbers corresponding to the object code or relocs shown. Only useful with ‘-d’, ‘-D’, or ‘-r’. ‘-m MACHINE’ ‘--architecture=MACHINE’ Specify the architecture to use when disassembling object files. This can be useful when disassembling object files which do not describe architecture information, such as S-records. You can list the available architectures with the ‘-i’ option. For most architectures it is possible to supply an architecture name and a machine name, separated by a colon. For example ‘foo:bar’ would refer to the ‘bar’ machine type in the ‘foo’ architecture. This can be helpful if objdump has been configured to support multiple architectures. If the target is an ARM architecture then this switch has an additional effect. It restricts the disassembly to only those instructions supported by the architecture specified by MACHINE. If it is necessary to use this switch because the input file does not contain any architecture information, but it is also desired to disassemble all the instructions use ‘-marm’. ‘-M OPTIONS’ ‘--disassembler-options=OPTIONS’ Pass target specific information to the disassembler. Only supported on some targets. If it is necessary to specify more than one disassembler option then multiple ‘-M’ options can be used or can be placed together into a comma separated list. For ARC, ‘dsp’ controls the printing of DSP instructions, ‘spfp’ selects the printing of FPX single precision FP instructions, ‘dpfp’ selects the printing of FPX double precision FP instructions, ‘quarkse_em’ selects the printing of special QuarkSE-EM instructions, ‘fpuda’ selects the printing of double precision assist instructions, ‘fpus’ selects the printing of FPU single precision FP instructions, while ‘fpud’ selects the printing of FPU double precision FP instructions. Additionally, one can choose to have all the immediates printed in hexadecimal using ‘hex’. By default, the short immediates are printed using the decimal representation, while the long immediate values are printed as hexadecimal. ‘cpu=...’ allows one to enforce a particular ISA when disassembling instructions, overriding the ‘-m’ value or whatever is in the ELF file. This might be useful to select ARC EM or HS ISA, because architecture is same for those and disassembler relies on private ELF header data to decide if code is for EM or HS. This option might be specified multiple times - only the latest value will be used. Valid values are same as for the assembler ‘-mcpu=...’ option. If the target is an ARM architecture then this switch can be used to select which register name set is used during disassembler. Specifying ‘-M reg-names-std’ (the default) will select the register names as used in ARM’s instruction set documentation, but with register 13 called ’sp’, register 14 called ’lr’ and register 15 called ’pc’. Specifying ‘-M reg-names-apcs’ will select the name set used by the ARM Procedure Call Standard, whilst specifying ‘-M reg-names-raw’ will just use ‘r’ followed by the register number. There are also two variants on the APCS register naming scheme enabled by ‘-M reg-names-atpcs’ and ‘-M reg-names-special-atpcs’ which use the ARM/Thumb Procedure Call Standard naming conventions. (Either with the normal register names or the special register names). This option can also be used for ARM architectures to force the disassembler to interpret all instructions as Thumb instructions by using the switch ‘--disassembler-options=force-thumb’. This can be useful when attempting to disassemble thumb code produced by other compilers. For AArch64 targets this switch can be used to set whether instructions are disassembled as the most general instruction using the ‘-M no-aliases’ option or whether instruction notes should be generated as comments in the disasssembly using ‘-M notes’. For the x86, some of the options duplicate functions of the ‘-m’ switch, but allow finer grained control. ‘x86-64’ ‘i386’ ‘i8086’ Select disassembly for the given architecture. ‘intel’ ‘att’ Select between intel syntax mode and AT&T syntax mode. ‘amd64’ ‘intel64’ Select between AMD64 ISA and Intel64 ISA. ‘intel-mnemonic’ ‘att-mnemonic’ Select between intel mnemonic mode and AT&T mnemonic mode. Note: ‘intel-mnemonic’ implies ‘intel’ and ‘att-mnemonic’ implies ‘att’. ‘addr64’ ‘addr32’ ‘addr16’ ‘data32’ ‘data16’ Specify the default address size and operand size. These five options will be overridden if ‘x86-64’, ‘i386’ or ‘i8086’ appear later in the option string. ‘suffix’ When in AT&T mode and also for a limited set of instructions when in Intel mode, instructs the disassembler to print a mnemonic suffix even when the suffix could be inferred by the operands or, for certain instructions, the execution mode’s defaults. For PowerPC, the ‘-M’ argument ‘raw’ selects disasssembly of hardware insns rather than aliases. For example, you will see ‘rlwinm’ rather than ‘clrlwi’, and ‘addi’ rather than ‘li’. All of the ‘-m’ arguments for ‘gas’ that select a CPU are supported. These are: ‘403’, ‘405’, ‘440’, ‘464’, ‘476’, ‘601’, ‘603’, ‘604’, ‘620’, ‘7400’, ‘7410’, ‘7450’, ‘7455’, ‘750cl’, ‘821’, ‘850’, ‘860’, ‘a2’, ‘booke’, ‘booke32’, ‘cell’, ‘com’, ‘e200z2’, ‘e200z4’, ‘e300’, ‘e500’, ‘e500mc’, ‘e500mc64’, ‘e500x2’, ‘e5500’, ‘e6500’, ‘efs’, ‘power4’, ‘power5’, ‘power6’, ‘power7’, ‘power8’, ‘power9’, ‘power10’, ‘ppc’, ‘ppc32’, ‘ppc64’, ‘ppc64bridge’, ‘ppcps’, ‘pwr’, ‘pwr2’, ‘pwr4’, ‘pwr5’, ‘pwr5x’, ‘pwr6’, ‘pwr7’, ‘pwr8’, ‘pwr9’, ‘pwr10’, ‘pwrx’, ‘titan’, ‘vle’, and ‘future’. ‘32’ and ‘64’ modify the default or a prior CPU selection, disabling and enabling 64-bit insns respectively. In addition, ‘altivec’, ‘any’, ‘lsp’, ‘htm’, ‘vsx’, ‘spe’ and ‘spe2’ add capabilities to a previous _or later_ CPU selection. ‘any’ will disassemble any opcode known to binutils, but in cases where an opcode has two different meanings or different arguments, you may not see the disassembly you expect. If you disassemble without giving a CPU selection, a default will be chosen from information gleaned by BFD from the object files headers, but the result again may not be as you expect. For MIPS, this option controls the printing of instruction mnemonic names and register names in disassembled instructions. Multiple selections from the following may be specified as a comma separated string, and invalid options are ignored: ‘no-aliases’ Print the ’raw’ instruction mnemonic instead of some pseudo instruction mnemonic. I.e., print ’daddu’ or ’or’ instead of ’move’, ’sll’ instead of ’nop’, etc. ‘msa’ Disassemble MSA instructions. ‘virt’ Disassemble the virtualization ASE instructions. ‘xpa’ Disassemble the eXtended Physical Address (XPA) ASE instructions. ‘gpr-names=ABI’ Print GPR (general-purpose register) names as appropriate for the specified ABI. By default, GPR names are selected according to the ABI of the binary being disassembled. ‘fpr-names=ABI’ Print FPR (floating-point register) names as appropriate for the specified ABI. By default, FPR numbers are printed rather than names. ‘cp0-names=ARCH’ Print CP0 (system control coprocessor; coprocessor 0) register names as appropriate for the CPU or architecture specified by ARCH. By default, CP0 register names are selected according to the architecture and CPU of the binary being disassembled. ‘hwr-names=ARCH’ Print HWR (hardware register, used by the ‘rdhwr’ instruction) names as appropriate for the CPU or architecture specified by ARCH. By default, HWR names are selected according to the architecture and CPU of the binary being disassembled. ‘reg-names=ABI’ Print GPR and FPR names as appropriate for the selected ABI. ‘reg-names=ARCH’ Print CPU-specific register names (CP0 register and HWR names) as appropriate for the selected CPU or architecture. For any of the options listed above, ABI or ARCH may be specified as ‘numeric’ to have numbers printed rather than names, for the selected types of registers. You can list the available values of ABI and ARCH using the ‘--help’ option. For VAX, you can specify function entry addresses with ‘-M entry:0xf00ba’. You can use this multiple times to properly disassemble VAX binary files that don’t contain symbol tables (like ROM dumps). In these cases, the function entry mask would otherwise be decoded as VAX instructions, which would probably lead the rest of the function being wrongly disassembled. ‘-p’ ‘--private-headers’ Print information that is specific to the object file format. The exact information printed depends upon the object file format. For some object file formats, no additional information is printed. ‘-P OPTIONS’ ‘--private=OPTIONS’ Print information that is specific to the object file format. The argument OPTIONS is a comma separated list that depends on the format (the lists of options is displayed with the help). For XCOFF, the available options are: ‘header’ ‘aout’ ‘sections’ ‘syms’ ‘relocs’ ‘lineno,’ ‘loader’ ‘except’ ‘typchk’ ‘traceback’ ‘toc’ ‘ldinfo’ For PE, the available options are: ‘header’ ‘sections’ Not all object formats support this option. In particular the ELF format does not use it. ‘-r’ ‘--reloc’ Print the relocation entries of the file. If used with ‘-d’ or ‘-D’, the relocations are printed interspersed with the disassembly. ‘-R’ ‘--dynamic-reloc’ Print the dynamic relocation entries of the file. This is only meaningful for dynamic objects, such as certain types of shared libraries. As for ‘-r’, if used with ‘-d’ or ‘-D’, the relocations are printed interspersed with the disassembly. ‘-s’ ‘--full-contents’ Display the full contents of sections, often used in combination with ‘-j’ to request specific sections. By default all non-empty non-bss sections are displayed. ‘-S’ ‘--source’ Display source code intermixed with disassembly, if possible. Implies ‘-d’. ‘--show-all-symbols’ When disassembling, show all the symbols that match a given address, not just the first one. ‘--source-comment[=TXT]’ Like the ‘-S’ option, but all source code lines are displayed with a prefix of TXT. Typically TXT will be a comment string which can be used to distinguish the assembler code from the source code. If TXT is not provided then a default string of “# “ (hash followed by a space), will be used. ‘--prefix=PREFIX’ Specify PREFIX to add to the absolute paths when used with ‘-S’. ‘--prefix-strip=LEVEL’ Indicate how many initial directory names to strip off the hardwired absolute paths. It has no effect without ‘--prefix=’PREFIX. ‘--show-raw-insn’ When disassembling instructions, print the instruction in hex as well as in symbolic form. This is the default except when ‘--prefix-addresses’ is used. ‘--no-show-raw-insn’ When disassembling instructions, do not print the instruction bytes. This is the default when ‘--prefix-addresses’ is used. ‘--insn-width=WIDTH’ Display WIDTH bytes on a single line when disassembling instructions. ‘--visualize-jumps[=color|=extended-color|=off]’ Visualize jumps that stay inside a function by drawing ASCII art between the start and target addresses. The optional ‘=color’ argument adds color to the output using simple terminal colors. Alternatively the ‘=extended-color’ argument will add color using 8bit colors, but these might not work on all terminals. If it is necessary to disable the ‘visualize-jumps’ option after it has previously been enabled then use ‘visualize-jumps=off’. ‘--disassembler-color=off’ ‘--disassembler-color=terminal’ ‘--disassembler-color=on|color|colour’ ‘--disassembler-color=extened|extended-color|extened-colour’ Enables or disables the use of colored syntax highlighting in disassembly output. The default behaviour is determined via a configure time option. Note, not all architectures support colored syntax highlighting, and depending upon the terminal used, colored output may not actually be legible. The ‘on’ argument adds colors using simple terminal colors. The ‘terminal’ argument does the same, but only if the output device is a terminal. The ‘extended-color’ argument is similar to the ‘on’ argument, but it uses 8-bit colors. These may not work on all terminals. The ‘off’ argument disables colored disassembly. ‘-W[lLiaprmfFsoORtUuTgAckK]’ ‘--dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=str-offsets,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]’ Displays the contents of the DWARF debug sections in the file, if any are present. Compressed debug sections are automatically decompressed (temporarily) before they are displayed. If one or more of the optional letters or words follows the switch then only those type(s) of data will be dumped. The letters and words refer to the following information: ‘a’ ‘=abbrev’ Displays the contents of the ‘.debug_abbrev’ section. ‘A’ ‘=addr’ Displays the contents of the ‘.debug_addr’ section. ‘c’ ‘=cu_index’ Displays the contents of the ‘.debug_cu_index’ and/or ‘.debug_tu_index’ sections. ‘f’ ‘=frames’ Display the raw contents of a ‘.debug_frame’ section. ‘F’ ‘=frames-interp’ Display the interpreted contents of a ‘.debug_frame’ section. ‘g’ ‘=gdb_index’ Displays the contents of the ‘.gdb_index’ and/or ‘.debug_names’ sections. ‘i’ ‘=info’ Displays the contents of the ‘.debug_info’ section. Note: the output from this option can also be restricted by the use of the ‘--dwarf-depth’ and ‘--dwarf-start’ options. ‘k’ ‘=links’ Displays the contents of the ‘.gnu_debuglink’, ‘.gnu_debugaltlink’ and ‘.debug_sup’ sections, if any of them are present. Also displays any links to separate dwarf object files (dwo), if they are specified by the DW_AT_GNU_dwo_name or DW_AT_dwo_name attributes in the ‘.debug_info’ section. ‘K’ ‘=follow-links’ Display the contents of any selected debug sections that are found in linked, separate debug info file(s). This can result in multiple versions of the same debug section being displayed if it exists in more than one file. In addition, when displaying DWARF attributes, if a form is found that references the separate debug info file, then the referenced contents will also be displayed. Note - in some distributions this option is enabled by default. It can be disabled via the ‘N’ debug option. The default can be chosen when configuring the binutils via the ‘--enable-follow-debug-links=yes’ or ‘--enable-follow-debug-links=no’ options. If these are not used then the default is to enable the following of debug links. Note - if support for the debuginfod protocol was enabled when the binutils were built then this option will also include an attempt to contact any debuginfod servers mentioned in the DEBUGINFOD_URLS environment variable. This could take some time to resolve. This behaviour can be disabled via the ‘=do-not-use-debuginfod’ debug option. ‘N’ ‘=no-follow-links’ Disables the following of links to separate debug info files. ‘D’ ‘=use-debuginfod’ Enables contacting debuginfod servers if there is a need to follow debug links. This is the default behaviour. ‘E’ ‘=do-not-use-debuginfod’ Disables contacting debuginfod servers when there is a need to follow debug links. ‘l’ ‘=rawline’ Displays the contents of the ‘.debug_line’ section in a raw format. ‘L’ ‘=decodedline’ Displays the interpreted contents of the ‘.debug_line’ section. ‘m’ ‘=macro’ Displays the contents of the ‘.debug_macro’ and/or ‘.debug_macinfo’ sections. ‘o’ ‘=loc’ Displays the contents of the ‘.debug_loc’ and/or ‘.debug_loclists’ sections. ‘O’ ‘=str-offsets’ Displays the contents of the ‘.debug_str_offsets’ section. ‘p’ ‘=pubnames’ Displays the contents of the ‘.debug_pubnames’ and/or ‘.debug_gnu_pubnames’ sections. ‘r’ ‘=aranges’ Displays the contents of the ‘.debug_aranges’ section. ‘R’ ‘=Ranges’ Displays the contents of the ‘.debug_ranges’ and/or ‘.debug_rnglists’ sections. ‘s’ ‘=str’ Displays the contents of the ‘.debug_str’, ‘.debug_line_str’ and/or ‘.debug_str_offsets’ sections. ‘t’ ‘=pubtype’ Displays the contents of the ‘.debug_pubtypes’ and/or ‘.debug_gnu_pubtypes’ sections. ‘T’ ‘=trace_aranges’ Displays the contents of the ‘.trace_aranges’ section. ‘u’ ‘=trace_abbrev’ Displays the contents of the ‘.trace_abbrev’ section. ‘U’ ‘=trace_info’ Displays the contents of the ‘.trace_info’ section. Note: displaying the contents of ‘.debug_static_funcs’, ‘.debug_static_vars’ and ‘debug_weaknames’ sections is not currently supported. ‘--dwarf-depth=N’ Limit the dump of the ‘.debug_info’ section to N children. This is only useful with ‘--debug-dump=info’. The default is to print all DIEs; the special value 0 for N will also have this effect. With a non-zero value for N, DIEs at or deeper than N levels will not be printed. The range for N is zero-based. ‘--dwarf-start=N’ Print only DIEs beginning with the DIE numbered N. This is only useful with ‘--debug-dump=info’. If specified, this option will suppress printing of any header information and all DIEs before the DIE numbered N. Only siblings and children of the specified DIE will be printed. This can be used in conjunction with ‘--dwarf-depth’. ‘--dwarf-check’ Enable additional checks for consistency of Dwarf information. ‘--ctf[=SECTION]’ Display the contents of the specified CTF section. CTF sections themselves contain many subsections, all of which are displayed in order. By default, display the name of the section named .CTF, which is the name emitted by ‘ld’. ‘--ctf-parent=MEMBER’ If the CTF section contains ambiguously-defined types, it will consist of an archive of many CTF dictionaries, all inheriting from one dictionary containing unambiguous types. This member is by default named .CTF, like the section containing it, but it is possible to change this name using the ‘ctf_link_set_memb_name_changer’ function at link time. When looking at CTF archives that have been created by a linker that uses the name changer to rename the parent archive member, ‘--ctf-parent’ can be used to specify the name used for the parent. ‘--sframe[=SECTION]’ Display the contents of the specified SFrame section. By default, display the name of the section named .SFRAME, which is the name emitted by ‘ld’. ‘-G’ ‘--stabs’ Display the full contents of any sections requested. Display the contents of the .stab and .stab.index and .stab.excl sections from an ELF file. This is only useful on systems (such as Solaris 2.0) in which ‘.stab’ debugging symbol-table entries are carried in an ELF section. In most other file formats, debugging symbol-table entries are interleaved with linkage symbols, and are visible in the ‘--syms’ output. ‘--start-address=ADDRESS’ Start displaying data at the specified address. This affects the output of the ‘-d’, ‘-r’ and ‘-s’ options. ‘--stop-address=ADDRESS’ Stop displaying data at the specified address. This affects the output of the ‘-d’, ‘-r’ and ‘-s’ options. ‘-t’ ‘--syms’ Print the symbol table entries of the file. This is similar to the information provided by the ‘nm’ program, although the display format is different. The format of the output depends upon the format of the file being dumped, but there are two main types. One looks like this: [ 4](sec 3)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000000 .bss [ 6](sec 1)(fl 0x00)(ty 0)(scl 2) (nx 0) 0x00000000 fred where the number inside the square brackets is the number of the entry in the symbol table, the SEC number is the section number, the FL value are the symbol’s flag bits, the TY number is the symbol’s type, the SCL number is the symbol’s storage class and the NX value is the number of auxiliary entries associated with the symbol. The last two fields are the symbol’s value and its name. The other common output format, usually seen with ELF based files, looks like this: 00000000 l d .bss 00000000 .bss 00000000 g .text 00000000 fred Here the first number is the symbol’s value (sometimes referred to as its address). The next field is actually a set of characters and spaces indicating the flag bits that are set on the symbol. These characters are described below. Next is the section with which the symbol is associated or _*ABS*_ if the section is absolute (ie not connected with any section), or _*UND*_ if the section is referenced in the file being dumped, but not defined there. After the section name comes another field, a number, which for common symbols is the alignment and for other symbol is the size. Finally the symbol’s name is displayed. The flag characters are divided into 7 groups as follows: ‘l’ ‘g’ ‘u’ ‘!’ The symbol is a local (l), global (g), unique global (u), neither global nor local (a space) or both global and local (!). A symbol can be neither local or global for a variety of reasons, e.g., because it is used for debugging, but it is probably an indication of a bug if it is ever both local and global. Unique global symbols are a GNU extension to the standard set of ELF symbol bindings. For such a symbol the dynamic linker will make sure that in the entire process there is just one symbol with this name and type in use. ‘w’ The symbol is weak (w) or strong (a space). ‘C’ The symbol denotes a constructor (C) or an ordinary symbol (a space). ‘W’ The symbol is a warning (W) or a normal symbol (a space). A warning symbol’s name is a message to be displayed if the symbol following the warning symbol is ever referenced. ‘I’ ‘i’ The symbol is an indirect reference to another symbol (I), a function to be evaluated during reloc processing (i) or a normal symbol (a space). ‘d’ ‘D’ The symbol is a debugging symbol (d) or a dynamic symbol (D) or a normal symbol (a space). ‘F’ ‘f’ ‘O’ The symbol is the name of a function (F) or a file (f) or an object (O) or just a normal symbol (a space). ‘-T’ ‘--dynamic-syms’ Print the dynamic symbol table entries of the file. This is only meaningful for dynamic objects, such as certain types of shared libraries. This is similar to the information provided by the ‘nm’ program when given the ‘-D’ (‘--dynamic’) option. The output format is similar to that produced by the ‘--syms’ option, except that an extra field is inserted before the symbol’s name, giving the version information associated with the symbol. If the version is the default version to be used when resolving unversioned references to the symbol then it’s displayed as is, otherwise it’s put into parentheses. ‘--special-syms’ When displaying symbols include those which the target considers to be special in some way and which would not normally be of interest to the user. ‘-U [D|I|L|E|X|H]’ ‘--unicode=[DEFAULT|INVALID|LOCALE|ESCAPE|HEX|HIGHLIGHT]’ Controls the display of UTF-8 encoded multibyte characters in strings. The default (‘--unicode=default’) is to give them no special treatment. The ‘--unicode=locale’ option displays the sequence in the current locale, which may or may not support them. The options ‘--unicode=hex’ and ‘--unicode=invalid’ display them as hex byte sequences enclosed by either angle brackets or curly braces. The ‘--unicode=escape’ option displays them as escape sequences (\UXXXX) and the ‘--unicode=highlight’ option displays them as escape sequences highlighted in red (if supported by the output device). The colouring is intended to draw attention to the presence of unicode sequences where they might not be expected. ‘-V’ ‘--version’ Print the version number of ‘objdump’ and exit. ‘-x’ ‘--all-headers’ Display all available header information, including the symbol table and relocation entries. Using ‘-x’ is equivalent to specifying all of ‘-a -f -h -p -r -t’. ‘-w’ ‘--wide’ Format some lines for output devices that have more than 80 columns. Also do not truncate symbol names when they are displayed. ‘-z’ ‘--disassemble-zeroes’ Normally the disassembly output will skip blocks of zeroes. This option directs the disassembler to disassemble those blocks, just like any other data.  File: binutils.info, Node: ranlib, Next: size, Prev: objdump, Up: Top 5 ranlib ******** ranlib [--plugin NAME] [-DhHvVt] ARCHIVE ‘ranlib’ generates an index to the contents of an archive and stores it in the archive. The index lists each symbol defined by a member of an archive that is a relocatable object file. You may use ‘nm -s’ or ‘nm --print-armap’ to list this index. An archive with such an index speeds up linking to the library and allows routines in the library to call each other without regard to their placement in the archive. The GNU ‘ranlib’ program is another form of GNU ‘ar’; running ‘ranlib’ is completely equivalent to executing ‘ar -s’. *Note ar::. ‘-h’ ‘-H’ ‘--help’ Show usage information for ‘ranlib’. ‘-v’ ‘-V’ ‘--version’ Show the version number of ‘ranlib’. ‘-D’ Operate in _deterministic_ mode. The symbol map archive member’s header will show zero for the UID, GID, and timestamp. When this option is used, multiple runs will produce identical output files. If ‘binutils’ was configured with ‘--enable-deterministic-archives’, then this mode is on by default. It can be disabled with the ‘-U’ option, described below. ‘-t’ Update the timestamp of the symbol map of an archive. ‘-U’ Do _not_ operate in _deterministic_ mode. This is the inverse of the ‘-D’ option, above: the archive index will get actual UID, GID, timestamp, and file mode values. If ‘binutils’ was configured _without_ ‘--enable-deterministic-archives’, then this mode is on by default.  File: binutils.info, Node: size, Next: strings, Prev: ranlib, Up: Top 6 size ****** size [-A|-B|-G|--format=COMPATIBILITY] [--help] [-d|-o|-x|--radix=NUMBER] [--common] [-t|--totals] [--target=BFDNAME] [-V|--version] [-f] [OBJFILE...] The GNU ‘size’ utility lists the section sizes and the total size for each of the binary files OBJFILE on its argument list. By default, one line of output is generated for each file or each module if the file is an archive. OBJFILE... are the files to be examined. If none are specified, the file ‘a.out’ will be used instead. The command-line options have the following meanings: ‘-A’ ‘-B’ ‘-G’ ‘--format=COMPATIBILITY’ Using one of these options, you can choose whether the output from GNU ‘size’ resembles output from System V ‘size’ (using ‘-A’, or ‘--format=sysv’), or Berkeley ‘size’ (using ‘-B’, or ‘--format=berkeley’). The default is the one-line format similar to Berkeley’s. Alternatively, you can choose the GNU format output (using ‘-G’, or ‘--format=gnu’), this is similar to Berkeley’s output format, but sizes are counted differently. Here is an example of the Berkeley (default) format of output from ‘size’: $ size --format=Berkeley ranlib size text data bss dec hex filename 294880 81920 11592 388392 5ed28 ranlib 294880 81920 11888 388688 5ee50 size The Berkeley style output counts read only data in the ‘text’ column, not in the ‘data’ column, the ‘dec’ and ‘hex’ columns both display the sum of the ‘text’, ‘data’, and ‘bss’ columns in decimal and hexadecimal respectively. The GNU format counts read only data in the ‘data’ column, not the ‘text’ column, and only displays the sum of the ‘text’, ‘data’, and ‘bss’ columns once, in the ‘total’ column. The ‘--radix’ option can be used to change the number base for all columns. Here is the same data displayed with GNU conventions: $ size --format=GNU ranlib size text data bss total filename 279880 96920 11592 388392 ranlib 279880 96920 11888 388688 size This is the same data, but displayed closer to System V conventions: $ size --format=SysV ranlib size ranlib : section size addr .text 294880 8192 .data 81920 303104 .bss 11592 385024 Total 388392 size : section size addr .text 294880 8192 .data 81920 303104 .bss 11888 385024 Total 388688 ‘--help’ ‘-h’ ‘-H’ ‘-?’ Show a summary of acceptable arguments and options. ‘-d’ ‘-o’ ‘-x’ ‘--radix=NUMBER’ Using one of these options, you can control whether the size of each section is given in decimal (‘-d’, or ‘--radix=10’); octal (‘-o’, or ‘--radix=8’); or hexadecimal (‘-x’, or ‘--radix=16’). In ‘--radix=NUMBER’, only the three values (8, 10, 16) are supported. The total size is always given in two radices; decimal and hexadecimal for ‘-d’ or ‘-x’ output, or octal and hexadecimal if you’re using ‘-o’. ‘--common’ Print total size of common symbols in each file. When using Berkeley or GNU format these are included in the bss size. ‘-t’ ‘--totals’ Show totals of all objects listed (Berkeley or GNU format mode only). ‘--target=BFDNAME’ Specify that the object-code format for OBJFILE is BFDNAME. This option may not be necessary; ‘size’ can automatically recognize many formats. *Note Target Selection::, for more information. ‘-v’ ‘-V’ ‘--version’ Display the version number of ‘size’. ‘-f’ Ignored. This option is used by other versions of the ‘size’ program, but it is not supported by the GNU Binutils version.  File: binutils.info, Node: strings, Next: strip, Prev: size, Up: Top 7 strings ********* strings [-afovV] [-MIN-LEN] [-n MIN-LEN] [--bytes=MIN-LEN] [-t RADIX] [--radix=RADIX] [-e ENCODING] [--encoding=ENCODING] [-U METHOD] [--unicode=METHOD] [-] [--all] [--print-file-name] [-T BFDNAME] [--target=BFDNAME] [-w] [--include-all-whitespace] [-s] [--output-separator SEP_STRING] [--help] [--version] FILE... For each FILE given, GNU ‘strings’ prints the printable character sequences that are at least 4 characters long (or the number given with the options below) and are followed by an unprintable character. Depending upon how the strings program was configured it will default to either displaying all the printable sequences that it can find in each file, or only those sequences that are in loadable, initialized data sections. If the file type is unrecognizable, or if strings is reading from stdin then it will always display all of the printable sequences that it can find. For backwards compatibility any file that occurs after a command-line option of just ‘-’ will also be scanned in full, regardless of the presence of any ‘-d’ option. ‘strings’ is mainly useful for determining the contents of non-text files. ‘-a’ ‘--all’ ‘-’ Scan the whole file, regardless of what sections it contains or whether those sections are loaded or initialized. Normally this is the default behaviour, but strings can be configured so that the ‘-d’ is the default instead. The ‘-’ option is position dependent and forces strings to perform full scans of any file that is mentioned after the ‘-’ on the command line, even if the ‘-d’ option has been specified. ‘-d’ ‘--data’ Only print strings from initialized, loaded data sections in the file. This may reduce the amount of garbage in the output, but it also exposes the strings program to any security flaws that may be present in the BFD library used to scan and load sections. Strings can be configured so that this option is the default behaviour. In such cases the ‘-a’ option can be used to avoid using the BFD library and instead just print all of the strings found in the file. ‘-f’ ‘--print-file-name’ Print the name of the file before each string. ‘--help’ Print a summary of the program usage on the standard output and exit. ‘-MIN-LEN’ ‘-n MIN-LEN’ ‘--bytes=MIN-LEN’ Print sequences of displayable characters that are at least MIN-LEN characters long. If not specified a default minimum length of 4 is used. The distinction between displayable and non-displayable characters depends upon the setting of the ‘-e’ and ‘-U’ options. Sequences are always terminated at control characters such as new-line and carriage-return, but not the tab character. ‘-o’ Like ‘-t o’. Some other versions of ‘strings’ have ‘-o’ act like ‘-t d’ instead. Since we can not be compatible with both ways, we simply chose one. ‘-t RADIX’ ‘--radix=RADIX’ Print the offset within the file before each string. The single character argument specifies the radix of the offset—‘o’ for octal, ‘x’ for hexadecimal, or ‘d’ for decimal. ‘-e ENCODING’ ‘--encoding=ENCODING’ Select the character encoding of the strings that are to be found. Possible values for ENCODING are: ‘s’ = single-7-bit-byte characters (default), ‘S’ = single-8-bit-byte characters, ‘b’ = 16-bit bigendian, ‘l’ = 16-bit littleendian, ‘B’ = 32-bit bigendian, ‘L’ = 32-bit littleendian. Useful for finding wide character strings. (‘l’ and ‘b’ apply to, for example, Unicode UTF-16/UCS-2 encodings). ‘-U [D|I|L|E|X|H]’ ‘--unicode=[DEFAULT|INVALID|LOCALE|ESCAPE|HEX|HIGHLIGHT]’ Controls the display of UTF-8 encoded multibyte characters in strings. The default (‘--unicode=default’) is to give them no special treatment, and instead rely upon the setting of the ‘--encoding’ option. The other values for this option automatically enable ‘--encoding=S’. The ‘--unicode=invalid’ option treats them as non-graphic characters and hence not part of a valid string. All the remaining options treat them as valid string characters. The ‘--unicode=locale’ option displays them in the current locale, which may or may not support UTF-8 encoding. The ‘--unicode=hex’ option displays them as hex byte sequences enclosed between <> characters. The ‘--unicode=escape’ option displays them as escape sequences (\UXXXX) and the ‘--unicode=highlight’ option displays them as escape sequences highlighted in red (if supported by the output device). The colouring is intended to draw attention to the presence of unicode sequences where they might not be expected. ‘-T BFDNAME’ ‘--target=BFDNAME’ Specify an object code format other than your system’s default format. *Note Target Selection::, for more information. ‘-v’ ‘-V’ ‘--version’ Print the program version number on the standard output and exit. ‘-w’ ‘--include-all-whitespace’ By default tab and space characters are included in the strings that are displayed, but other whitespace characters, such a newlines and carriage returns, are not. The ‘-w’ option changes this so that all whitespace characters are considered to be part of a string. ‘-s’ ‘--output-separator’ By default, output strings are delimited by a new-line. This option allows you to supply any string to be used as the output record separator. Useful with –include-all-whitespace where strings may contain new-lines internally.  File: binutils.info, Node: strip, Next: c++filt, Prev: strings, Up: Top 8 strip ******* strip [-F BFDNAME |--target=BFDNAME] [-I BFDNAME |--input-target=BFDNAME] [-O BFDNAME |--output-target=BFDNAME] [-s|--strip-all] [-S|-g|-d|--strip-debug] [--strip-dwo] [-K SYMBOLNAME|--keep-symbol=SYMBOLNAME] [-M|--merge-notes][--no-merge-notes] [-N SYMBOLNAME |--strip-symbol=SYMBOLNAME] [-w|--wildcard] [-x|--discard-all] [-X |--discard-locals] [-R SECTIONNAME |--remove-section=SECTIONNAME] [--keep-section=SECTIONPATTERN] [--remove-relocations=SECTIONPATTERN] [--strip-section-headers] [-o FILE] [-p|--preserve-dates] [-D|--enable-deterministic-archives] [-U|--disable-deterministic-archives] [--keep-section-symbols] [--keep-file-symbols] [--only-keep-debug] [-v |--verbose] [-V|--version] [--help] [--info] OBJFILE... GNU ‘strip’ discards all symbols from object files OBJFILE. The list of object files may include archives. At least one object file must be given. ‘strip’ modifies the files named in its argument, rather than writing modified copies under different names. ‘-F BFDNAME’ ‘--target=BFDNAME’ Treat the original OBJFILE as a file with the object code format BFDNAME, and rewrite it in the same format. *Note Target Selection::, for more information. ‘--help’ Show a summary of the options to ‘strip’ and exit. ‘--info’ Display a list showing all architectures and object formats available. ‘-I BFDNAME’ ‘--input-target=BFDNAME’ Treat the original OBJFILE as a file with the object code format BFDNAME. *Note Target Selection::, for more information. ‘-O BFDNAME’ ‘--output-target=BFDNAME’ Replace OBJFILE with a file in the output format BFDNAME. *Note Target Selection::, for more information. ‘-R SECTIONNAME’ ‘--remove-section=SECTIONNAME’ Remove any section named SECTIONNAME from the output file, in addition to whatever sections would otherwise be removed. This option may be given more than once. Note that using this option inappropriately may make the output file unusable. The wildcard character ‘*’ may be given at the end of SECTIONNAME. If so, then any section starting with SECTIONNAME will be removed. If the first character of SECTIONPATTERN is the exclamation point (!) then matching sections will not be removed even if an earlier use of ‘--remove-section’ on the same command line would otherwise remove it. For example: --remove-section=.text.* --remove-section=!.text.foo will remove all sections matching the pattern ’.text.*’, but will not remove the section ’.text.foo’. ‘--keep-section=SECTIONPATTERN’ When removing sections from the output file, keep sections that match SECTIONPATTERN. ‘--remove-relocations=SECTIONPATTERN’ Remove relocations from the output file for any section matching SECTIONPATTERN. This option may be given more than once. Note that using this option inappropriately may make the output file unusable. Wildcard characters are accepted in SECTIONPATTERN. For example: --remove-relocations=.text.* will remove the relocations for all sections matching the patter ’.text.*’. If the first character of SECTIONPATTERN is the exclamation point (!) then matching sections will not have their relocation removed even if an earlier use of ‘--remove-relocations’ on the same command line would otherwise cause the relocations to be removed. For example: --remove-relocations=.text.* --remove-relocations=!.text.foo will remove all relocations for sections matching the pattern ’.text.*’, but will not remove relocations for the section ’.text.foo’. ‘--strip-section-headers’ Strip section headers. This option is specific to ELF files. Implies ‘--strip-all’ and ‘--merge-notes’. ‘-s’ ‘--strip-all’ Remove all symbols. ‘-g’ ‘-S’ ‘-d’ ‘--strip-debug’ Remove debugging symbols only. ‘--strip-dwo’ Remove the contents of all DWARF .dwo sections, leaving the remaining debugging sections and all symbols intact. See the description of this option in the ‘objcopy’ section for more information. ‘--strip-unneeded’ Remove all symbols that are not needed for relocation processing in addition to debugging symbols and sections stripped by ‘--strip-debug’. ‘-K SYMBOLNAME’ ‘--keep-symbol=SYMBOLNAME’ When stripping symbols, keep symbol SYMBOLNAME even if it would normally be stripped. This option may be given more than once. ‘-M’ ‘--merge-notes’ ‘--no-merge-notes’ For ELF files, attempt (or do not attempt) to reduce the size of any SHT_NOTE type sections by removing duplicate notes. The default is to attempt this reduction unless stripping debug or DWO information. ‘-N SYMBOLNAME’ ‘--strip-symbol=SYMBOLNAME’ Remove symbol SYMBOLNAME from the source file. This option may be given more than once, and may be combined with strip options other than ‘-K’. ‘-o FILE’ Put the stripped output in FILE, rather than replacing the existing file. When this argument is used, only one OBJFILE argument may be specified. ‘-p’ ‘--preserve-dates’ Preserve the access and modification dates of the file. ‘-D’ ‘--enable-deterministic-archives’ Operate in _deterministic_ mode. When copying archive members and writing the archive index, use zero for UIDs, GIDs, timestamps, and use consistent file modes for all files. If ‘binutils’ was configured with ‘--enable-deterministic-archives’, then this mode is on by default. It can be disabled with the ‘-U’ option, below. ‘-U’ ‘--disable-deterministic-archives’ Do _not_ operate in _deterministic_ mode. This is the inverse of the ‘-D’ option, above: when copying archive members and writing the archive index, use their actual UID, GID, timestamp, and file mode values. This is the default unless ‘binutils’ was configured with ‘--enable-deterministic-archives’. ‘-w’ ‘--wildcard’ Permit regular expressions in SYMBOLNAMEs used in other command line options. The question mark (?), asterisk (*), backslash (\) and square brackets ([]) operators can be used anywhere in the symbol name. If the first character of the symbol name is the exclamation point (!) then the sense of the switch is reversed for that symbol. For example: -w -K !foo -K fo* would cause strip to only keep symbols that start with the letters “fo”, but to discard the symbol “foo”. ‘-x’ ‘--discard-all’ Remove non-global symbols. ‘-X’ ‘--discard-locals’ Remove compiler-generated local symbols. (These usually start with ‘L’ or ‘.’.) ‘--keep-section-symbols’ When stripping a file, perhaps with ‘--strip-debug’ or ‘--strip-unneeded’, retain any symbols specifying section names, which would otherwise get stripped. ‘--keep-file-symbols’ When stripping a file, perhaps with ‘--strip-debug’ or ‘--strip-unneeded’, retain any symbols specifying source file names, which would otherwise get stripped. ‘--only-keep-debug’ Strip a file, emptying the contents of any sections that would not be stripped by ‘--strip-debug’ and leaving the debugging sections intact. In ELF files, this preserves all the note sections in the output as well. Note - the section headers of the stripped sections are preserved, including their sizes, but the contents of the section are discarded. The section headers are preserved so that other tools can match up the debuginfo file with the real executable, even if that executable has been relocated to a different address space. The intention is that this option will be used in conjunction with ‘--add-gnu-debuglink’ to create a two part executable. One a stripped binary which will occupy less space in RAM and in a distribution and the second a debugging information file which is only needed if debugging abilities are required. The suggested procedure to create these files is as follows: 1. Link the executable as normal. Assuming that it is called ‘foo’ then... 2. Run ‘objcopy --only-keep-debug foo foo.dbg’ to create a file containing the debugging info. 3. Run ‘objcopy --strip-debug foo’ to create a stripped executable. 4. Run ‘objcopy --add-gnu-debuglink=foo.dbg foo’ to add a link to the debugging info into the stripped executable. Note—the choice of ‘.dbg’ as an extension for the debug info file is arbitrary. Also the ‘--only-keep-debug’ step is optional. You could instead do this: 1. Link the executable as normal. 2. Copy ‘foo’ to ‘foo.full’ 3. Run ‘strip --strip-debug foo’ 4. Run ‘objcopy --add-gnu-debuglink=foo.full foo’ i.e., the file pointed to by the ‘--add-gnu-debuglink’ can be the full executable. It does not have to be a file created by the ‘--only-keep-debug’ switch. Note—this switch is only intended for use on fully linked files. It does not make sense to use it on object files where the debugging information may be incomplete. Besides the gnu_debuglink feature currently only supports the presence of one filename containing debugging information, not multiple filenames on a one-per-object-file basis. ‘-V’ ‘--version’ Show the version number for ‘strip’. ‘-v’ ‘--verbose’ Verbose output: list all object files modified. In the case of archives, ‘strip -v’ lists all members of the archive.  File: binutils.info, Node: c++filt, Next: addr2line, Prev: strip, Up: Top 9 c++filt ********* c++filt [-_|--strip-underscore] [-n|--no-strip-underscore] [-p|--no-params] [-t|--types] [-i|--no-verbose] [-r|--no-recurse-limit] [-R|--recurse-limit] [-s FORMAT|--format=FORMAT] [--help] [--version] [SYMBOL...] The C++ and Java languages provide function overloading, which means that you can write many functions with the same name, providing that each function takes parameters of different types. In order to be able to distinguish these similarly named functions C++ and Java encode them into a low-level assembler name which uniquely identifies each different version. This process is known as “mangling”. The ‘c++filt’ (1) program does the inverse mapping: it decodes (“demangles”) low-level names into user-level names so that they can be read. Every alphanumeric word (consisting of letters, digits, underscores, dollars, or periods) seen in the input is a potential mangled name. If the name decodes into a C++ name, the C++ name replaces the low-level name in the output, otherwise the original word is output. In this way you can pass an entire assembler source file, containing mangled names, through ‘c++filt’ and see the same source file containing demangled names. You can also use ‘c++filt’ to decipher individual symbols by passing them on the command line: c++filt SYMBOL If no SYMBOL arguments are given, ‘c++filt’ reads symbol names from the standard input instead. All the results are printed on the standard output. The difference between reading names from the command line versus reading names from the standard input is that command-line arguments are expected to be just mangled names and no checking is performed to separate them from surrounding text. Thus for example: c++filt -n _Z1fv will work and demangle the name to “f()” whereas: c++filt -n _Z1fv, will not work. (Note the extra comma at the end of the mangled name which makes it invalid). This command however will work: echo _Z1fv, | c++filt -n and will display “f(),”, i.e., the demangled name followed by a trailing comma. This behaviour is because when the names are read from the standard input it is expected that they might be part of an assembler source file where there might be extra, extraneous characters trailing after a mangled name. For example: .type _Z1fv, @function ‘-_’ ‘--strip-underscore’ On some systems, both the C and C++ compilers put an underscore in front of every name. For example, the C name ‘foo’ gets the low-level name ‘_foo’. This option removes the initial underscore. Whether ‘c++filt’ removes the underscore by default is target dependent. ‘-n’ ‘--no-strip-underscore’ Do not remove the initial underscore. ‘-p’ ‘--no-params’ When demangling the name of a function, do not display the types of the function’s parameters. ‘-t’ ‘--types’ Attempt to demangle types as well as function names. This is disabled by default since mangled types are normally only used internally in the compiler, and they can be confused with non-mangled names. For example, a function called “a” treated as a mangled type name would be demangled to “signed char”. ‘-i’ ‘--no-verbose’ Do not include implementation details (if any) in the demangled output. ‘-r’ ‘-R’ ‘--recurse-limit’ ‘--no-recurse-limit’ ‘--recursion-limit’ ‘--no-recursion-limit’ Enables or disables a limit on the amount of recursion performed whilst demangling strings. Since the name mangling formats allow for an infinite level of recursion it is possible to create strings whose decoding will exhaust the amount of stack space available on the host machine, triggering a memory fault. The limit tries to prevent this from happening by restricting recursion to 2048 levels of nesting. The default is for this limit to be enabled, but disabling it may be necessary in order to demangle truly complicated names. Note however that if the recursion limit is disabled then stack exhaustion is possible and any bug reports about such an event will be rejected. The ‘-r’ option is a synonym for the ‘--no-recurse-limit’ option. The ‘-R’ option is a synonym for the ‘--recurse-limit’ option. ‘-s FORMAT’ ‘--format=FORMAT’ ‘c++filt’ can decode various methods of mangling, used by different compilers. The argument to this option selects which method it uses: ‘auto’ Automatic selection based on executable (the default method) ‘gnu’ the one used by the GNU C++ compiler (g++) ‘lucid’ the one used by the Lucid compiler (lcc) ‘arm’ the one specified by the C++ Annotated Reference Manual ‘hp’ the one used by the HP compiler (aCC) ‘edg’ the one used by the EDG compiler ‘gnu-v3’ the one used by the GNU C++ compiler (g++) with the V3 ABI. ‘java’ the one used by the GNU Java compiler (gcj) ‘gnat’ the one used by the GNU Ada compiler (GNAT). ‘--help’ Print a summary of the options to ‘c++filt’ and exit. ‘--version’ Print the version number of ‘c++filt’ and exit. _Warning:_ ‘c++filt’ is a new utility, and the details of its user interface are subject to change in future releases. In particular, a command-line option may be required in the future to decode a name passed as an argument on the command line; in other words, c++filt SYMBOL may in a future release become c++filt OPTION SYMBOL ---------- Footnotes ---------- (1) MS-DOS does not allow ‘+’ characters in file names, so on MS-DOS this program is named ‘CXXFILT’.  File: binutils.info, Node: addr2line, Next: windmc, Prev: c++filt, Up: Top 10 addr2line ************ addr2line [-a|--addresses] [-b BFDNAME|--target=BFDNAME] [-C|--demangle[=STYLE]] [-r|--no-recurse-limit] [-R|--recurse-limit] [-e FILENAME|--exe=FILENAME] [-f|--functions] [-s|--basename] [-i|--inlines] [-p|--pretty-print] [-j|--section=NAME] [-H|--help] [-V|--version] [addr addr ...] ‘addr2line’ translates addresses or symbol+offset into file names and line numbers. Given an address or symbol+offset in an executable or an offset in a section of a relocatable object, it uses the debugging information to figure out which file name and line number are associated with it. The executable or relocatable object to use is specified with the ‘-e’ option. The default is the file ‘a.out’. The section in the relocatable object to use is specified with the ‘-j’ option. ‘addr2line’ has two modes of operation. In the first, hexadecimal addresses or symbol+offset are specified on the command line, and ‘addr2line’ displays the file name and line number for each address. In the second, ‘addr2line’ reads hexadecimal addresses or symbol+offset from standard input, and prints the file name and line number for each address on standard output. In this mode, ‘addr2line’ may be used in a pipe to convert dynamically chosen addresses. The format of the output is ‘FILENAME:LINENO’. By default each input address generates one line of output. Two options can generate additional lines before each ‘FILENAME:LINENO’ line (in that order). If the ‘-a’ option is used then a line with the input address is displayed. If the ‘-f’ option is used, then a line with the ‘FUNCTIONNAME’ is displayed. This is the name of the function containing the address. One option can generate additional lines after the ‘FILENAME:LINENO’ line. If the ‘-i’ option is used and the code at the given address is present there because of inlining by the compiler then additional lines are displayed afterwards. One or two extra lines (if the ‘-f’ option is used) are displayed for each inlined function. Alternatively if the ‘-p’ option is used then each input address generates a single, long, output line containing the address, the function name, the file name and the line number. If the ‘-i’ option has also been used then any inlined functions will be displayed in the same manner, but on separate lines, and prefixed by the text ‘(inlined by)’. If the file name or function name can not be determined, ‘addr2line’ will print two question marks in their place. If the line number can not be determined, ‘addr2line’ will print 0. When symbol+offset is used, +offset is optional, except when the symbol is ambigious with a hex number. The resolved symbols can be mangled or unmangled, except unmangled symbols with + are not allowed. The long and short forms of options, shown here as alternatives, are equivalent. ‘-a’ ‘--addresses’ Display the address before the function name, file and line number information. The address is printed with a ‘0x’ prefix to easily identify it. ‘-b BFDNAME’ ‘--target=BFDNAME’ Specify that the object-code format for the object files is BFDNAME. ‘-C’ ‘--demangle[=STYLE]’ Decode (“demangle”) low-level symbol names into user-level names. Besides removing any initial underscore prepended by the system, this makes C++ function names readable. Different compilers have different mangling styles. The optional demangling style argument can be used to choose an appropriate demangling style for your compiler. *Note c++filt::, for more information on demangling. ‘-e FILENAME’ ‘--exe=FILENAME’ Specify the name of the executable for which addresses should be translated. The default file is ‘a.out’. ‘-f’ ‘--functions’ Display function names as well as file and line number information. ‘-s’ ‘--basenames’ Display only the base of each file name. ‘-i’ ‘--inlines’ If the address belongs to a function that was inlined, the source information for all enclosing scopes back to the first non-inlined function will also be printed. For example, if ‘main’ inlines ‘callee1’ which inlines ‘callee2’, and address is from ‘callee2’, the source information for ‘callee1’ and ‘main’ will also be printed. ‘-j’ ‘--section’ Read offsets relative to the specified section instead of absolute addresses. ‘-p’ ‘--pretty-print’ Make the output more human friendly: each location are printed on one line. If option ‘-i’ is specified, lines for all enclosing scopes are prefixed with ‘(inlined by)’. ‘-r’ ‘-R’ ‘--recurse-limit’ ‘--no-recurse-limit’ ‘--recursion-limit’ ‘--no-recursion-limit’ Enables or disables a limit on the amount of recursion performed whilst demangling strings. Since the name mangling formats allow for an infinite level of recursion it is possible to create strings whose decoding will exhaust the amount of stack space available on the host machine, triggering a memory fault. The limit tries to prevent this from happening by restricting recursion to 2048 levels of nesting. The default is for this limit to be enabled, but disabling it may be necessary in order to demangle truly complicated names. Note however that if the recursion limit is disabled then stack exhaustion is possible and any bug reports about such an event will be rejected. The ‘-r’ option is a synonym for the ‘--no-recurse-limit’ option. The ‘-R’ option is a synonym for the ‘--recurse-limit’ option. Note this option is only effective if the ‘-C’ or ‘--demangle’ option has been enabled.  File: binutils.info, Node: windmc, Next: windres, Prev: addr2line, Up: Top 11 windmc ********* ‘windmc’ may be used to generator Windows message resources. _Warning:_ ‘windmc’ is not always built as part of the binary utilities, since it is only useful for Windows targets. windmc [options] input-file ‘windmc’ reads message definitions from an input file (.mc) and translate them into a set of output files. The output files may be of four kinds: ‘h’ A C header file containing the message definitions. ‘rc’ A resource file compilable by the ‘windres’ tool. ‘bin’ One or more binary files containing the resource data for a specific message language. ‘dbg’ A C include file that maps message id’s to their symbolic name. The exact description of these different formats is available in documentation from Microsoft. When ‘windmc’ converts from the ‘mc’ format to the ‘bin’ format, ‘rc’, ‘h’, and optional ‘dbg’ it is acting like the Windows Message Compiler. ‘-a’ ‘--ascii_in’ Specifies that the input file specified is ASCII. This is the default behaviour. ‘-A’ ‘--ascii_out’ Specifies that messages in the output ‘bin’ files should be in ASCII format. ‘-b’ ‘--binprefix’ Specifies that ‘bin’ filenames should have to be prefixed by the basename of the source file. ‘-c’ ‘--customflag’ Sets the customer bit in all message id’s. ‘-C CODEPAGE’ ‘--codepage_in CODEPAGE’ Sets the default codepage to be used to convert input file to UTF16. The default is ocdepage 1252. ‘-d’ ‘--decimal_values’ Outputs the constants in the header file in decimal. Default is using hexadecimal output. ‘-e EXT’ ‘--extension EXT’ The extension for the header file. The default is .h extension. ‘-F TARGET’ ‘--target TARGET’ Specify the BFD format to use for a bin file as output. This is a BFD target name; you can use the ‘--help’ option to see a list of supported targets. Normally ‘windmc’ will use the default format, which is the first one listed by the ‘--help’ option. *note Target Selection::. ‘-h PATH’ ‘--headerdir PATH’ The target directory of the generated header file. The default is the current directory. ‘-H’ ‘--help’ Displays a list of command-line options and then exits. ‘-m CHARACTERS’ ‘--maxlength CHARACTERS’ Instructs ‘windmc’ to generate a warning if the length of any message exceeds the number specified. ‘-n’ ‘--nullterminate’ Terminate message text in ‘bin’ files by zero. By default they are terminated by CR/LF. ‘-o’ ‘--hresult_use’ Not yet implemented. Instructs ‘windmc’ to generate an OLE2 header file, using HRESULT definitions. Status codes are used if the flag is not specified. ‘-O CODEPAGE’ ‘--codepage_out CODEPAGE’ Sets the default codepage to be used to output text files. The default is ocdepage 1252. ‘-r PATH’ ‘--rcdir PATH’ The target directory for the generated ‘rc’ script and the generated ‘bin’ files that the resource compiler script includes. The default is the current directory. ‘-u’ ‘--unicode_in’ Specifies that the input file is UTF16. ‘-U’ ‘--unicode_out’ Specifies that messages in the output ‘bin’ file should be in UTF16 format. This is the default behaviour. ‘-v’ ‘--verbose’ Enable verbose mode. ‘-V’ ‘--version’ Prints the version number for ‘windmc’. ‘-x PATH’ ‘--xdgb PATH’ The path of the ‘dbg’ C include file that maps message id’s to the symbolic name. No such file is generated without specifying the switch.  File: binutils.info, Node: windres, Next: dlltool, Prev: windmc, Up: Top 12 windres ********** ‘windres’ may be used to manipulate Windows resources. _Warning:_ ‘windres’ is not always built as part of the binary utilities, since it is only useful for Windows targets. windres [options] [input-file] [output-file] ‘windres’ reads resources from an input file and copies them into an output file. Either file may be in one of three formats: ‘rc’ A text format read by the Resource Compiler. ‘res’ A binary format generated by the Resource Compiler. ‘coff’ A COFF object or executable. The exact description of these different formats is available in documentation from Microsoft. When ‘windres’ converts from the ‘rc’ format to the ‘res’ format, it is acting like the Windows Resource Compiler. When ‘windres’ converts from the ‘res’ format to the ‘coff’ format, it is acting like the Windows ‘CVTRES’ program. When ‘windres’ generates an ‘rc’ file, the output is similar but not identical to the format expected for the input. When an input ‘rc’ file refers to an external filename, an output ‘rc’ file will instead include the file contents. If the input or output format is not specified, ‘windres’ will guess based on the file name, or, for the input file, the file contents. A file with an extension of ‘.rc’ will be treated as an ‘rc’ file, a file with an extension of ‘.res’ will be treated as a ‘res’ file, and a file with an extension of ‘.o’ or ‘.exe’ will be treated as a ‘coff’ file. If no output file is specified, ‘windres’ will print the resources in ‘rc’ format to standard output. The normal use is for you to write an ‘rc’ file, use ‘windres’ to convert it to a COFF object file, and then link the COFF file into your application. This will make the resources described in the ‘rc’ file available to Windows. ‘-i FILENAME’ ‘--input FILENAME’ The name of the input file. If this option is not used, then ‘windres’ will use the first non-option argument as the input file name. If there are no non-option arguments, then ‘windres’ will read from standard input. ‘windres’ can not read a COFF file from standard input. ‘-o FILENAME’ ‘--output FILENAME’ The name of the output file. If this option is not used, then ‘windres’ will use the first non-option argument, after any used for the input file name, as the output file name. If there is no non-option argument, then ‘windres’ will write to standard output. ‘windres’ can not write a COFF file to standard output. Note, for compatibility with ‘rc’ the option ‘-fo’ is also accepted, but its use is not recommended. ‘-J FORMAT’ ‘--input-format FORMAT’ The input format to read. FORMAT may be ‘res’, ‘rc’, or ‘coff’. If no input format is specified, ‘windres’ will guess, as described above. ‘-O FORMAT’ ‘--output-format FORMAT’ The output format to generate. FORMAT may be ‘res’, ‘rc’, or ‘coff’. If no output format is specified, ‘windres’ will guess, as described above. ‘-F TARGET’ ‘--target TARGET’ Specify the BFD format to use for a COFF file as input or output. This is a BFD target name; you can use the ‘--help’ option to see a list of supported targets. Normally ‘windres’ will use the default format, which is the first one listed by the ‘--help’ option. *note Target Selection::. ‘--preprocessor PROGRAM’ When ‘windres’ reads an ‘rc’ file, it runs it through the C preprocessor first. This option may be used to specify the preprocessor to use. The default preprocessor is ‘gcc’. ‘--preprocessor-arg OPTION’ When ‘windres’ reads an ‘rc’ file, it runs it through the C preprocessor first. This option may be used to specify additional text to be passed to preprocessor on its command line. This option can be used multiple times to add multiple options to the preprocessor command line. If the ‘--preprocessor’ option has not been specified then a default set of preprocessor arguments will be used, with any ‘--preprocessor-arg’ options being placed after them on the command line. These default arguments are ‘-E’, ‘-xc-header’ and ‘-DRC_INVOKED’. ‘-I DIRECTORY’ ‘--include-dir DIRECTORY’ Specify an include directory to use when reading an ‘rc’ file. ‘windres’ will pass this to the preprocessor as an ‘-I’ option. ‘windres’ will also search this directory when looking for files named in the ‘rc’ file. If the argument passed to this command matches any of the supported FORMATS (as described in the ‘-J’ option), it will issue a deprecation warning, and behave just like the ‘-J’ option. New programs should not use this behaviour. If a directory happens to match a FORMAT, simple prefix it with ‘./’ to disable the backward compatibility. ‘-D TARGET’ ‘--define SYM[=VAL]’ Specify a ‘-D’ option to pass to the preprocessor when reading an ‘rc’ file. ‘-U TARGET’ ‘--undefine SYM’ Specify a ‘-U’ option to pass to the preprocessor when reading an ‘rc’ file. ‘-r’ Ignored for compatibility with rc. ‘-v’ Enable verbose mode. This tells you what the preprocessor is if you didn’t specify one. ‘-c VAL’ ‘--codepage VAL’ Specify the default codepage to use when reading an ‘rc’ file. VAL should be a hexadecimal prefixed by ‘0x’ or decimal codepage code. The valid range is from zero up to 0xffff, but the validity of the codepage is host and configuration dependent. ‘-l VAL’ ‘--language VAL’ Specify the default language to use when reading an ‘rc’ file. VAL should be a hexadecimal language code. The low eight bits are the language, and the high eight bits are the sublanguage. ‘--use-temp-file’ Use a temporary file to instead of using popen to read the output of the preprocessor. Use this option if the popen implementation is buggy on the host (eg., certain non-English language versions of Windows 95 and Windows 98 are known to have buggy popen where the output will instead go the console). ‘--no-use-temp-file’ Use popen, not a temporary file, to read the output of the preprocessor. This is the default behaviour. ‘-h’ ‘--help’ Prints a usage summary. ‘-V’ ‘--version’ Prints the version number for ‘windres’. ‘--yydebug’ If ‘windres’ is compiled with ‘YYDEBUG’ defined as ‘1’, this will turn on parser debugging.  File: binutils.info, Node: dlltool, Next: readelf, Prev: windres, Up: Top 13 dlltool ********** ‘dlltool’ is used to create the files needed to create dynamic link libraries (DLLs) on systems which understand PE format image files such as Windows. A DLL contains an export table which contains information that the runtime loader needs to resolve references from a referencing program. The export table is generated by this program by reading in a ‘.def’ file or scanning the ‘.a’ and ‘.o’ files which will be in the DLL. A ‘.o’ file can contain information in special ‘.drectve’ sections with export information. _Note:_ ‘dlltool’ is not always built as part of the binary utilities, since it is only useful for those targets which support DLLs. dlltool [-d|--input-def DEF-FILE-NAME] [-b|--base-file BASE-FILE-NAME] [-e|--output-exp EXPORTS-FILE-NAME] [-z|--output-def DEF-FILE-NAME] [-l|--output-lib LIBRARY-FILE-NAME] [-y|--output-delaylib LIBRARY-FILE-NAME] [--export-all-symbols] [--no-export-all-symbols] [--exclude-symbols LIST] [--no-default-excludes] [-S|--as PATH-TO-ASSEMBLER] [-f|--as-flags OPTIONS] [-D|--dllname NAME] [-m|--machine MACHINE] [-a|--add-indirect] [-U|--add-underscore] [--add-stdcall-underscore] [-k|--kill-at] [-A|--add-stdcall-alias] [-p|--ext-prefix-alias PREFIX] [-x|--no-idata4] [-c|--no-idata5] [--use-nul-prefixed-import-tables] [-I|--identify LIBRARY-FILE-NAME] [--identify-strict] [-i|--interwork] [-n|--nodelete] [-t|--temp-prefix PREFIX] [-v|--verbose] [-h|--help] [-V|--version] [--no-leading-underscore] [--leading-underscore] [--deterministic-libraries] [--non-deterministic-libraries] [object-file ...] ‘dlltool’ reads its inputs, which can come from the ‘-d’ and ‘-b’ options as well as object files specified on the command line. It then processes these inputs and if the ‘-e’ option has been specified it creates a exports file. If the ‘-l’ option has been specified it creates a library file and if the ‘-z’ option has been specified it creates a def file. Any or all of the ‘-e’, ‘-l’ and ‘-z’ options can be present in one invocation of dlltool. When creating a DLL, along with the source for the DLL, it is necessary to have three other files. ‘dlltool’ can help with the creation of these files. The first file is a ‘.def’ file which specifies which functions are exported from the DLL, which functions the DLL imports, and so on. This is a text file and can be created by hand, or ‘dlltool’ can be used to create it using the ‘-z’ option. In this case ‘dlltool’ will scan the object files specified on its command line looking for those functions which have been specially marked as being exported and put entries for them in the ‘.def’ file it creates. In order to mark a function as being exported from a DLL, it needs to have an ‘-export:’ entry in the ‘.drectve’ section of the object file. This can be done in C by using the asm() operator: asm (".section .drectve"); asm (".ascii \"-export:my_func\""); int my_func (void) { ... } The second file needed for DLL creation is an exports file. This file is linked with the object files that make up the body of the DLL and it handles the interface between the DLL and the outside world. This is a binary file and it can be created by giving the ‘-e’ option to ‘dlltool’ when it is creating or reading in a ‘.def’ file. The third file needed for DLL creation is the library file that programs will link with in order to access the functions in the DLL (an ‘import library’). This file can be created by giving the ‘-l’ option to dlltool when it is creating or reading in a ‘.def’ file. If the ‘-y’ option is specified, dlltool generates a delay-import library that can be used instead of the normal import library to allow a program to link to the dll only as soon as an imported function is called for the first time. The resulting executable will need to be linked to the static delayimp library containing __delayLoadHelper2(), which in turn will import LoadLibraryA and GetProcAddress from kernel32. ‘dlltool’ builds the library file by hand, but it builds the exports file by creating temporary files containing assembler statements and then assembling these. The ‘-S’ command-line option can be used to specify the path to the assembler that dlltool will use, and the ‘-f’ option can be used to pass specific flags to that assembler. The ‘-n’ can be used to prevent dlltool from deleting these temporary assembler files when it is done, and if ‘-n’ is specified twice then this will prevent dlltool from deleting the temporary object files it used to build the library. Here is an example of creating a DLL from a source file ‘dll.c’ and also creating a program (from an object file called ‘program.o’) that uses that DLL: gcc -c dll.c dlltool -e exports.o -l dll.lib dll.o gcc dll.o exports.o -o dll.dll gcc program.o dll.lib -o program ‘dlltool’ may also be used to query an existing import library to determine the name of the DLL to which it is associated. See the description of the ‘-I’ or ‘--identify’ option. The command-line options have the following meanings: ‘-d FILENAME’ ‘--input-def FILENAME’ Specifies the name of a ‘.def’ file to be read in and processed. ‘-b FILENAME’ ‘--base-file FILENAME’ Specifies the name of a base file to be read in and processed. The contents of this file will be added to the relocation section in the exports file generated by dlltool. ‘-e FILENAME’ ‘--output-exp FILENAME’ Specifies the name of the export file to be created by dlltool. ‘-z FILENAME’ ‘--output-def FILENAME’ Specifies the name of the ‘.def’ file to be created by dlltool. ‘-l FILENAME’ ‘--output-lib FILENAME’ Specifies the name of the library file to be created by dlltool. ‘-y FILENAME’ ‘--output-delaylib FILENAME’ Specifies the name of the delay-import library file to be created by dlltool. ‘--deterministic-libraries’ ‘--non-deterministic-libraries’ When creating output libraries in response to either the ‘--output-lib’ or ‘--output-delaylib’ options either use the value of zero for any timestamps, user ids and group ids created (‘--deterministic-libraries’) or the actual timestamps, user ids and group ids (‘--non-deterministic-libraries’). ‘--export-all-symbols’ Treat all global and weak defined symbols found in the input object files as symbols to be exported. There is a small list of symbols which are not exported by default; see the ‘--no-default-excludes’ option. You may add to the list of symbols to not export by using the ‘--exclude-symbols’ option. ‘--no-export-all-symbols’ Only export symbols explicitly listed in an input ‘.def’ file or in ‘.drectve’ sections in the input object files. This is the default behaviour. The ‘.drectve’ sections are created by ‘dllexport’ attributes in the source code. ‘--exclude-symbols LIST’ Do not export the symbols in LIST. This is a list of symbol names separated by comma or colon characters. The symbol names should not contain a leading underscore. This is only meaningful when ‘--export-all-symbols’ is used. ‘--no-default-excludes’ When ‘--export-all-symbols’ is used, it will by default avoid exporting certain special symbols. The current list of symbols to avoid exporting is ‘DllMain@12’, ‘DllEntryPoint@0’, ‘impure_ptr’. You may use the ‘--no-default-excludes’ option to go ahead and export these special symbols. This is only meaningful when ‘--export-all-symbols’ is used. ‘-S PATH’ ‘--as PATH’ Specifies the path, including the filename, of the assembler to be used to create the exports file. ‘-f OPTIONS’ ‘--as-flags OPTIONS’ Specifies any specific command-line options to be passed to the assembler when building the exports file. This option will work even if the ‘-S’ option is not used. This option only takes one argument, and if it occurs more than once on the command line, then later occurrences will override earlier occurrences. So if it is necessary to pass multiple options to the assembler they should be enclosed in double quotes. ‘-D NAME’ ‘--dll-name NAME’ Specifies the name to be stored in the ‘.def’ file as the name of the DLL when the ‘-e’ option is used. If this option is not present, then the filename given to the ‘-e’ option will be used as the name of the DLL. ‘-m MACHINE’ ‘-machine MACHINE’ Specifies the type of machine for which the library file should be built. ‘dlltool’ has a built in default type, depending upon how it was created, but this option can be used to override that. This is normally only useful when creating DLLs for an ARM processor, when the contents of the DLL are actually encode using Thumb instructions. ‘-a’ ‘--add-indirect’ Specifies that when ‘dlltool’ is creating the exports file it should add a section which allows the exported functions to be referenced without using the import library. Whatever the hell that means! ‘-U’ ‘--add-underscore’ Specifies that when ‘dlltool’ is creating the exports file it should prepend an underscore to the names of _all_ exported symbols. ‘--no-leading-underscore’ ‘--leading-underscore’ Specifies whether standard symbol should be forced to be prefixed, or not. ‘--add-stdcall-underscore’ Specifies that when ‘dlltool’ is creating the exports file it should prepend an underscore to the names of exported _stdcall_ functions. Variable names and non-stdcall function names are not modified. This option is useful when creating GNU-compatible import libs for third party DLLs that were built with MS-Windows tools. ‘-k’ ‘--kill-at’ Specifies that ‘@’ suffixes should be omitted from the names of stdcall functions that will be imported from the DLL. This is useful when creating an import library for a DLL which exports stdcall functions but without the usual ‘@’ symbol name suffix. This does not change the naming of symbols provided by the import library to programs linked against it, but only the entries in the import table (ie the .idata section). ‘-A’ ‘--add-stdcall-alias’ Specifies that when ‘dlltool’ is creating the exports file it should add aliases for stdcall symbols without ‘@ ’ in addition to the symbols with ‘@ ’. ‘-p’ ‘--ext-prefix-alias PREFIX’ Causes ‘dlltool’ to create external aliases for all DLL imports with the specified prefix. The aliases are created for both external and import symbols with no leading underscore. ‘-x’ ‘--no-idata4’ Specifies that when ‘dlltool’ is creating the exports and library files it should omit the ‘.idata4’ section. This is for compatibility with certain operating systems. ‘--use-nul-prefixed-import-tables’ Specifies that when ‘dlltool’ is creating the exports and library files it should prefix the ‘.idata4’ and ‘.idata5’ by zero an element. This emulates old gnu import library generation of ‘dlltool’. By default this option is turned off. ‘-c’ ‘--no-idata5’ Specifies that when ‘dlltool’ is creating the exports and library files it should omit the ‘.idata5’ section. This is for compatibility with certain operating systems. ‘-I FILENAME’ ‘--identify FILENAME’ Specifies that ‘dlltool’ should inspect the import library indicated by FILENAME and report, on ‘stdout’, the name(s) of the associated DLL(s). This can be performed in addition to any other operations indicated by the other options and arguments. ‘dlltool’ fails if the import library does not exist or is not actually an import library. See also ‘--identify-strict’. ‘--identify-strict’ Modifies the behavior of the ‘--identify’ option, such that an error is reported if FILENAME is associated with more than one DLL. ‘-i’ ‘--interwork’ Specifies that ‘dlltool’ should mark the objects in the library file and exports file that it produces as supporting interworking between ARM and Thumb code. ‘-n’ ‘--nodelete’ Makes ‘dlltool’ preserve the temporary assembler files it used to create the exports file. If this option is repeated then dlltool will also preserve the temporary object files it uses to create the library file. ‘-t PREFIX’ ‘--temp-prefix PREFIX’ Makes ‘dlltool’ use PREFIX when constructing the names of temporary assembler and object files. By default, the temp file prefix is generated from the pid. ‘-v’ ‘--verbose’ Make dlltool describe what it is doing. ‘-h’ ‘--help’ Displays a list of command-line options and then exits. ‘-V’ ‘--version’ Displays dlltool’s version number and then exits. * Menu: * def file format:: The format of the dlltool ‘.def’ file  File: binutils.info, Node: def file format, Up: dlltool 13.1 The format of the ‘dlltool’ ‘.def’ file ============================================ A ‘.def’ file contains any number of the following commands: ‘NAME’ NAME ‘[ ,’ BASE ‘]’ The result is going to be named NAME‘.exe’. ‘LIBRARY’ NAME ‘[ ,’ BASE ‘]’ The result is going to be named NAME‘.dll’. Note: If you want to use LIBRARY as name then you need to quote. Otherwise this will fail due a necessary hack for libtool (see PR binutils/13710 for more details). ‘EXPORTS ( ( (’ NAME1 ‘[ = ’ NAME2 ‘] ) | ( ’ NAME1 ‘=’ MODULE-NAME ‘.’ EXTERNAL-NAME ‘) ) [ == ’ ITS_NAME ‘]’ ‘[’ INTEGER ‘] [ NONAME ] [ CONSTANT ] [ DATA ] [ PRIVATE ] ) *’ Declares NAME1 as an exported symbol from the DLL, with optional ordinal number INTEGER, or declares NAME1 as an alias (forward) of the function EXTERNAL-NAME in the DLL. If ITS_NAME is specified, this name is used as string in export table. MODULE-NAME. Note: The ‘EXPORTS’ has to be the last command in .def file, as keywords are treated - beside ‘LIBRARY’ - as simple name-identifiers. If you want to use LIBRARY as name then you need to quote it. ‘IMPORTS ( (’ INTERNAL-NAME ‘=’ MODULE-NAME ‘.’ INTEGER ‘) | [’ INTERNAL-NAME ‘= ]’ MODULE-NAME ‘.’ EXTERNAL-NAME ‘) [ == ) ITS_NAME ] *’ Declares that EXTERNAL-NAME or the exported function whose ordinal number is INTEGER is to be imported from the file MODULE-NAME. If INTERNAL-NAME is specified then this is the name that the imported function will be referred to in the body of the DLL. If ITS_NAME is specified, this name is used as string in import table. Note: The ‘IMPORTS’ has to be the last command in .def file, as keywords are treated - beside ‘LIBRARY’ - as simple name-identifiers. If you want to use LIBRARY as name then you need to quote it. ‘DESCRIPTION’ STRING Puts STRING into the output ‘.exp’ file in the ‘.rdata’ section. ‘STACKSIZE’ NUMBER-RESERVE ‘[, ’ NUMBER-COMMIT ‘]’ ‘HEAPSIZE’ NUMBER-RESERVE ‘[, ’ NUMBER-COMMIT ‘]’ Generates ‘--stack’ or ‘--heap’ NUMBER-RESERVE,NUMBER-COMMIT in the output ‘.drectve’ section. The linker will see this and act upon it. ‘CODE’ ATTR ‘+’ ‘DATA’ ATTR ‘+’ ‘SECTIONS (’ SECTION-NAME ATTR‘ + ) *’ Generates ‘--attr’ SECTION-NAME ATTR in the output ‘.drectve’ section, where ATTR is one of ‘READ’, ‘WRITE’, ‘EXECUTE’ or ‘SHARED’. The linker will see this and act upon it.  File: binutils.info, Node: readelf, Next: elfedit, Prev: dlltool, Up: Top 14 readelf ********** readelf [-a|--all] [-h|--file-header] [-l|--program-headers|--segments] [-S|--section-headers|--sections] [-g|--section-groups] [-t|--section-details] [-e|--headers] [-s|--syms|--symbols] [--dyn-syms|--lto-syms] [--sym-base=[0|8|10|16]] [--demangle=STYLE|--no-demangle] [--quiet] [--recurse-limit|--no-recurse-limit] [-U METHOD|--unicode=METHOD] [-n|--notes] [-r|--relocs] [-u|--unwind] [-d|--dynamic] [-V|--version-info] [-A|--arch-specific] [-D|--use-dynamic] [-L|--lint|--enable-checks] [-x |--hex-dump=] [-p |--string-dump=] [-R |--relocated-dump=] [-z|--decompress] [-c|--archive-index] [-w[lLiaprmfFsoORtUuTgAck]| --debug-dump[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=str-offsets,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links]] [-wK|--debug-dump=follow-links] [-wN|--debug-dump=no-follow-links] [-wD|--debug-dump=use-debuginfod] [-wE|--debug-dump=do-not-use-debuginfod] [-P|--process-links] [--dwarf-depth=N] [--dwarf-start=N] [--ctf=SECTION] [--ctf-parent=SECTION] [--ctf-symbols=SECTION] [--ctf-strings=SECTION] [--sframe=SECTION] [-I|--histogram] [-v|--version] [-W|--wide] [-T|--silent-truncation] [-H|--help] ELFFILE... ‘readelf’ displays information about one or more ELF format object files. The options control what particular information to display. ELFFILE... are the object files to be examined. 32-bit and 64-bit ELF files are supported, as are archives containing ELF files. This program performs a similar function to ‘objdump’ but it goes into more detail and it exists independently of the BFD library, so if there is a bug in BFD then readelf will not be affected. The long and short forms of options, shown here as alternatives, are equivalent. At least one option besides ‘-v’ or ‘-H’ must be given. ‘-a’ ‘--all’ Equivalent to specifying ‘--file-header’, ‘--program-headers’, ‘--sections’, ‘--symbols’, ‘--relocs’, ‘--dynamic’, ‘--notes’, ‘--version-info’, ‘--arch-specific’, ‘--unwind’, ‘--section-groups’ and ‘--histogram’. Note - this option does not enable ‘--use-dynamic’ itself, so if that option is not present on the command line then dynamic symbols and dynamic relocs will not be displayed. ‘-h’ ‘--file-header’ Displays the information contained in the ELF header at the start of the file. ‘-l’ ‘--program-headers’ ‘--segments’ Displays the information contained in the file’s segment headers, if it has any. ‘--quiet’ Suppress "no symbols" diagnostic. ‘-S’ ‘--sections’ ‘--section-headers’ Displays the information contained in the file’s section headers, if it has any. ‘-g’ ‘--section-groups’ Displays the information contained in the file’s section groups, if it has any. ‘-t’ ‘--section-details’ Displays the detailed section information. Implies ‘-S’. ‘-s’ ‘--symbols’ ‘--syms’ Displays the entries in symbol table section of the file, if it has one. If a symbol has version information associated with it then this is displayed as well. The version string is displayed as a suffix to the symbol name, preceded by an @ character. For example ‘foo@VER_1’. If the version is the default version to be used when resolving unversioned references to the symbol then it is displayed as a suffix preceded by two @ characters. For example ‘foo@@VER_2’. ‘--dyn-syms’ Displays the entries in dynamic symbol table section of the file, if it has one. The output format is the same as the format used by the ‘--syms’ option. ‘--lto-syms’ Displays the contents of any LTO symbol tables in the file. ‘--sym-base=[0|8|10|16]’ Forces the size field of the symbol table to use the given base. Any unrecognized options will be treated as ‘0’. ‘--sym-base=0’ represents the default and legacy behaviour. This will output sizes as decimal for numbers less than 100000. For sizes 100000 and greater hexadecimal notation will be used with a 0x prefix. ‘--sym-base=8’ will give the symbol sizes in octal. ‘--sym-base=10’ will always give the symbol sizes in decimal. ‘--sym-base=16’ will always give the symbol sizes in hexadecimal with a 0x prefix. ‘-C’ ‘--demangle[=STYLE]’ Decode (“demangle”) low-level symbol names into user-level names. This makes C++ function names readable. Different compilers have different mangling styles. The optional demangling style argument can be used to choose an appropriate demangling style for your compiler. *Note c++filt::, for more information on demangling. ‘--no-demangle’ Do not demangle low-level symbol names. This is the default. ‘--recurse-limit’ ‘--no-recurse-limit’ ‘--recursion-limit’ ‘--no-recursion-limit’ Enables or disables a limit on the amount of recursion performed whilst demangling strings. Since the name mangling formats allow for an infinite level of recursion it is possible to create strings whose decoding will exhaust the amount of stack space available on the host machine, triggering a memory fault. The limit tries to prevent this from happening by restricting recursion to 2048 levels of nesting. The default is for this limit to be enabled, but disabling it may be necessary in order to demangle truly complicated names. Note however that if the recursion limit is disabled then stack exhaustion is possible and any bug reports about such an event will be rejected. ‘-U [D|I|L|E|X|H]’ ‘--unicode=[default|invalid|locale|escape|hex|highlight]’ Controls the display of non-ASCII characters in identifier names. The default (‘--unicode=locale’ or ‘--unicode=default’) is to treat them as multibyte characters and display them in the current locale. All other versions of this option treat the bytes as UTF-8 encoded values and attempt to interpret them. If they cannot be interpreted or if the ‘--unicode=invalid’ option is used then they are displayed as a sequence of hex bytes, encloses in curly parethesis characters. Using the ‘--unicode=escape’ option will display the characters as as unicode escape sequences (\UXXXX). Using the ‘--unicode=hex’ will display the characters as hex byte sequences enclosed between angle brackets. Using the ‘--unicode=highlight’ will display the characters as unicode escape sequences but it will also highlighted them in red, assuming that colouring is supported by the output device. The colouring is intended to draw attention to the presence of unicode sequences when they might not be expected. ‘-e’ ‘--headers’ Display all the headers in the file. Equivalent to ‘-h -l -S’. ‘-n’ ‘--notes’ Displays the contents of the NOTE segments and/or sections, if any. ‘-r’ ‘--relocs’ Displays the contents of the file’s relocation section, if it has one. ‘-u’ ‘--unwind’ Displays the contents of the file’s unwind section, if it has one. Only the unwind sections for IA64 ELF files, as well as ARM unwind tables (‘.ARM.exidx’ / ‘.ARM.extab’) are currently supported. If support is not yet implemented for your architecture you could try dumping the contents of the .EH_FRAMES section using the ‘--debug-dump=frames’ or ‘--debug-dump=frames-interp’ options. ‘-d’ ‘--dynamic’ Displays the contents of the file’s dynamic section, if it has one. ‘-V’ ‘--version-info’ Displays the contents of the version sections in the file, it they exist. ‘-A’ ‘--arch-specific’ Displays architecture-specific information in the file, if there is any. ‘-D’ ‘--use-dynamic’ When displaying symbols, this option makes ‘readelf’ use the symbol hash tables in the file’s dynamic section, rather than the symbol table sections. When displaying relocations, this option makes ‘readelf’ display the dynamic relocations rather than the static relocations. ‘-L’ ‘--lint’ ‘--enable-checks’ Displays warning messages about possible problems with the file(s) being examined. If used on its own then all of the contents of the file(s) will be examined. If used with one of the dumping options then the warning messages will only be produced for the things being displayed. ‘-x ’ ‘--hex-dump=’ Displays the contents of the indicated section as a hexadecimal bytes. A number identifies a particular section by index in the section table; any other string identifies all sections with that name in the object file. ‘-R ’ ‘--relocated-dump=’ Displays the contents of the indicated section as a hexadecimal bytes. A number identifies a particular section by index in the section table; any other string identifies all sections with that name in the object file. The contents of the section will be relocated before they are displayed. ‘-p ’ ‘--string-dump=’ Displays the contents of the indicated section as printable strings. A number identifies a particular section by index in the section table; any other string identifies all sections with that name in the object file. ‘-z’ ‘--decompress’ Requests that the section(s) being dumped by ‘x’, ‘R’ or ‘p’ options are decompressed before being displayed. If the section(s) are not compressed then they are displayed as is. ‘-c’ ‘--archive-index’ Displays the file symbol index information contained in the header part of binary archives. Performs the same function as the ‘t’ command to ‘ar’, but without using the BFD library. *Note ar::. ‘-w[lLiaprmfFsOoRtUuTgAckK]’ ‘--debug-dump[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=str-offsets,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]’ Displays the contents of the DWARF debug sections in the file, if any are present. Compressed debug sections are automatically decompressed (temporarily) before they are displayed. If one or more of the optional letters or words follows the switch then only those type(s) of data will be dumped. The letters and words refer to the following information: ‘a’ ‘=abbrev’ Displays the contents of the ‘.debug_abbrev’ section. ‘A’ ‘=addr’ Displays the contents of the ‘.debug_addr’ section. ‘c’ ‘=cu_index’ Displays the contents of the ‘.debug_cu_index’ and/or ‘.debug_tu_index’ sections. ‘f’ ‘=frames’ Display the raw contents of a ‘.debug_frame’ section. ‘F’ ‘=frames-interp’ Display the interpreted contents of a ‘.debug_frame’ section. ‘g’ ‘=gdb_index’ Displays the contents of the ‘.gdb_index’ and/or ‘.debug_names’ sections. ‘i’ ‘=info’ Displays the contents of the ‘.debug_info’ section. Note: the output from this option can also be restricted by the use of the ‘--dwarf-depth’ and ‘--dwarf-start’ options. ‘k’ ‘=links’ Displays the contents of the ‘.gnu_debuglink’, ‘.gnu_debugaltlink’ and ‘.debug_sup’ sections, if any of them are present. Also displays any links to separate dwarf object files (dwo), if they are specified by the DW_AT_GNU_dwo_name or DW_AT_dwo_name attributes in the ‘.debug_info’ section. ‘K’ ‘=follow-links’ Display the contents of any selected debug sections that are found in linked, separate debug info file(s). This can result in multiple versions of the same debug section being displayed if it exists in more than one file. In addition, when displaying DWARF attributes, if a form is found that references the separate debug info file, then the referenced contents will also be displayed. Note - in some distributions this option is enabled by default. It can be disabled via the ‘N’ debug option. The default can be chosen when configuring the binutils via the ‘--enable-follow-debug-links=yes’ or ‘--enable-follow-debug-links=no’ options. If these are not used then the default is to enable the following of debug links. Note - if support for the debuginfod protocol was enabled when the binutils were built then this option will also include an attempt to contact any debuginfod servers mentioned in the DEBUGINFOD_URLS environment variable. This could take some time to resolve. This behaviour can be disabled via the ‘=do-not-use-debuginfod’ debug option. ‘N’ ‘=no-follow-links’ Disables the following of links to separate debug info files. ‘D’ ‘=use-debuginfod’ Enables contacting debuginfod servers if there is a need to follow debug links. This is the default behaviour. ‘E’ ‘=do-not-use-debuginfod’ Disables contacting debuginfod servers when there is a need to follow debug links. ‘l’ ‘=rawline’ Displays the contents of the ‘.debug_line’ section in a raw format. ‘L’ ‘=decodedline’ Displays the interpreted contents of the ‘.debug_line’ section. ‘m’ ‘=macro’ Displays the contents of the ‘.debug_macro’ and/or ‘.debug_macinfo’ sections. ‘o’ ‘=loc’ Displays the contents of the ‘.debug_loc’ and/or ‘.debug_loclists’ sections. ‘O’ ‘=str-offsets’ Displays the contents of the ‘.debug_str_offsets’ section. ‘p’ ‘=pubnames’ Displays the contents of the ‘.debug_pubnames’ and/or ‘.debug_gnu_pubnames’ sections. ‘r’ ‘=aranges’ Displays the contents of the ‘.debug_aranges’ section. ‘R’ ‘=Ranges’ Displays the contents of the ‘.debug_ranges’ and/or ‘.debug_rnglists’ sections. ‘s’ ‘=str’ Displays the contents of the ‘.debug_str’, ‘.debug_line_str’ and/or ‘.debug_str_offsets’ sections. ‘t’ ‘=pubtype’ Displays the contents of the ‘.debug_pubtypes’ and/or ‘.debug_gnu_pubtypes’ sections. ‘T’ ‘=trace_aranges’ Displays the contents of the ‘.trace_aranges’ section. ‘u’ ‘=trace_abbrev’ Displays the contents of the ‘.trace_abbrev’ section. ‘U’ ‘=trace_info’ Displays the contents of the ‘.trace_info’ section. Note: displaying the contents of ‘.debug_static_funcs’, ‘.debug_static_vars’ and ‘debug_weaknames’ sections is not currently supported. ‘--dwarf-depth=N’ Limit the dump of the ‘.debug_info’ section to N children. This is only useful with ‘--debug-dump=info’. The default is to print all DIEs; the special value 0 for N will also have this effect. With a non-zero value for N, DIEs at or deeper than N levels will not be printed. The range for N is zero-based. ‘--dwarf-start=N’ Print only DIEs beginning with the DIE numbered N. This is only useful with ‘--debug-dump=info’. If specified, this option will suppress printing of any header information and all DIEs before the DIE numbered N. Only siblings and children of the specified DIE will be printed. This can be used in conjunction with ‘--dwarf-depth’. ‘-P’ ‘--process-links’ Display the contents of non-debug sections found in separate debuginfo files that are linked to the main file. This option automatically implies the ‘-wK’ option, and only sections requested by other command line options will be displayed. ‘--ctf[=SECTION]’ Display the contents of the specified CTF section. CTF sections themselves contain many subsections, all of which are displayed in order. By default, display the name of the section named .CTF, which is the name emitted by ‘ld’. ‘--ctf-parent=MEMBER’ If the CTF section contains ambiguously-defined types, it will consist of an archive of many CTF dictionaries, all inheriting from one dictionary containing unambiguous types. This member is by default named .CTF, like the section containing it, but it is possible to change this name using the ‘ctf_link_set_memb_name_changer’ function at link time. When looking at CTF archives that have been created by a linker that uses the name changer to rename the parent archive member, ‘--ctf-parent’ can be used to specify the name used for the parent. ‘--ctf-symbols=SECTION’ ‘--ctf-strings=SECTION’ Specify the name of another section from which the CTF file can inherit strings and symbols. By default, the ‘.symtab’ and its linked string table are used. If either of ‘--ctf-symbols’ or ‘--ctf-strings’ is specified, the other must be specified as well. ‘-I’ ‘--histogram’ Display a histogram of bucket list lengths when displaying the contents of the symbol tables. ‘-v’ ‘--version’ Display the version number of readelf. ‘-W’ ‘--wide’ Don’t break output lines to fit into 80 columns. By default ‘readelf’ breaks section header and segment listing lines for 64-bit ELF files, so that they fit into 80 columns. This option causes ‘readelf’ to print each section header resp. each segment one a single line, which is far more readable on terminals wider than 80 columns. ‘-T’ ‘--silent-truncation’ Normally when readelf is displaying a symbol name, and it has to truncate the name to fit into an 80 column display, it will add a suffix of ‘[...]’ to the name. This command line option disables this behaviour, allowing 5 more characters of the name to be displayed and restoring the old behaviour of readelf (prior to release 2.35). ‘-H’ ‘--help’ Display the command-line options understood by ‘readelf’.  File: binutils.info, Node: elfedit, Next: Common Options, Prev: readelf, Up: Top 15 elfedit ********** elfedit [--input-mach=MACHINE] [--input-type=TYPE] [--input-osabi=OSABI] [--input-abiversion=VERSION] --output-mach=MACHINE --output-type=TYPE --output-osabi=OSABI --output-abiversion=VERSION --enable-x86-feature=FEATURE --disable-x86-feature=FEATURE [-v|--version] [-h|--help] ELFFILE... ‘elfedit’ updates the ELF header and program property of ELF files which have the matching ELF machine and file types. The options control how and which fields in the ELF header and program property should be updated. ELFFILE... are the ELF files to be updated. 32-bit and 64-bit ELF files are supported, as are archives containing ELF files. The long and short forms of options, shown here as alternatives, are equivalent. At least one of the ‘--output-mach’, ‘--output-type’, ‘--output-osabi’, ‘--output-abiversion’, ‘--enable-x86-feature’ and ‘--disable-x86-feature’ options must be given. ‘--input-mach=MACHINE’ Set the matching input ELF machine type to MACHINE. If ‘--input-mach’ isn’t specified, it will match any ELF machine types. The supported ELF machine types are, I386, IAMCU, L1OM, K1OM and X86-64. ‘--output-mach=MACHINE’ Change the ELF machine type in the ELF header to MACHINE. The supported ELF machine types are the same as ‘--input-mach’. ‘--input-type=TYPE’ Set the matching input ELF file type to TYPE. If ‘--input-type’ isn’t specified, it will match any ELF file types. The supported ELF file types are, REL, EXEC and DYN. ‘--output-type=TYPE’ Change the ELF file type in the ELF header to TYPE. The supported ELF types are the same as ‘--input-type’. ‘--input-osabi=OSABI’ Set the matching input ELF file OSABI to OSABI. If ‘--input-osabi’ isn’t specified, it will match any ELF OSABIs. The supported ELF OSABIs are, NONE, HPUX, NETBSD, GNU, LINUX (alias for GNU), SOLARIS, AIX, IRIX, FREEBSD, TRU64, MODESTO, OPENBSD, OPENVMS, NSK, AROS and FENIXOS. ‘--output-osabi=OSABI’ Change the ELF OSABI in the ELF header to OSABI. The supported ELF OSABI are the same as ‘--input-osabi’. ‘--input-abiversion=VERSION’ Set the matching input ELF file ABIVERSION to VERSION. VERSION must be between 0 and 255. If ‘--input-abiversion’ isn’t specified, it will match any ELF ABIVERSIONs. ‘--output-abiversion=VERSION’ Change the ELF ABIVERSION in the ELF header to VERSION. VERSION must be between 0 and 255. ‘--enable-x86-feature=FEATURE’ Set the FEATURE bit in program property in EXEC or DYN ELF files with machine types of I386 or X86-64. The supported features are, IBT, SHSTK, LAM_U48 and LAM_U57. ‘--disable-x86-feature=FEATURE’ Clear the FEATURE bit in program property in EXEC or DYN ELF files with machine types of I386 or X86-64. The supported features are the same as ‘--enable-x86-feature’. Note: ‘--enable-x86-feature’ and ‘--disable-x86-feature’ are available only on hosts with ‘mmap’ support. ‘-v’ ‘--version’ Display the version number of ‘elfedit’. ‘-h’ ‘--help’ Display the command-line options understood by ‘elfedit’.  File: binutils.info, Node: Common Options, Next: Selecting the Target System, Prev: elfedit, Up: Top 16 Common Options ***************** The following command-line options are supported by all of the programs described in this manual. ‘@FILE’ Read command-line options from FILE. The options read are inserted in place of the original @FILE option. If FILE does not exist, or cannot be read, then the option will be treated literally, and not removed. Options in FILE are separated by whitespace. A whitespace character may be included in an option by surrounding the entire option in either single or double quotes. Any character (including a backslash) may be included by prefixing the character to be included with a backslash. The FILE may itself contain additional @FILE options; any such options will be processed recursively. ‘--help’ Display the command-line options supported by the program. ‘--version’ Display the version number of the program.  File: binutils.info, Node: Selecting the Target System, Next: debuginfod, Prev: Common Options, Up: Top 17 Selecting the Target System ****************************** You can specify two aspects of the target system to the GNU binary file utilities, each in several ways: • the target • the architecture In the following summaries, the lists of ways to specify values are in order of decreasing precedence. The ways listed first override those listed later. The commands to list valid values only list the values for which the programs you are running were configured. If they were configured with ‘--enable-targets=all’, the commands list most of the available values, but a few are left out; not all targets can be configured in at once because some of them can only be configured “native” (on hosts with the same type as the target system). * Menu: * Target Selection:: * Architecture Selection::  File: binutils.info, Node: Target Selection, Next: Architecture Selection, Up: Selecting the Target System 17.1 Target Selection ===================== A “target” is an object file format. A given target may be supported for multiple architectures (*note Architecture Selection::). A target selection may also have variations for different operating systems or architectures. The command to list valid target values is ‘objdump -i’ (the first column of output contains the relevant information). Some sample values are: ‘a.out-hp300bsd’, ‘ecoff-littlemips’, ‘a.out-sunos-big’. You can also specify a target using a configuration triplet. This is the same sort of name that is passed to ‘configure’ to specify a target. When you use a configuration triplet as an argument, it must be fully canonicalized. You can see the canonical version of a triplet by running the shell script ‘config.sub’ which is included with the sources. Some sample configuration triplets are: ‘m68k-hp-bsd’, ‘mips-dec-ultrix’, ‘sparc-sun-sunos’. ‘objdump’ Target ---------------- Ways to specify: 1. command-line option: ‘-b’ or ‘--target’ 2. environment variable ‘GNUTARGET’ 3. deduced from the input file ‘objcopy’ and ‘strip’ Input Target ---------------------------------- Ways to specify: 1. command-line options: ‘-I’ or ‘--input-target’, or ‘-F’ or ‘--target’ 2. environment variable ‘GNUTARGET’ 3. deduced from the input file ‘objcopy’ and ‘strip’ Output Target ----------------------------------- Ways to specify: 1. command-line options: ‘-O’ or ‘--output-target’, or ‘-F’ or ‘--target’ 2. the input target (see “‘objcopy’ and ‘strip’ Input Target” above) 3. environment variable ‘GNUTARGET’ 4. deduced from the input file ‘nm’, ‘size’, and ‘strings’ Target ---------------------------------- Ways to specify: 1. command-line option: ‘--target’ 2. environment variable ‘GNUTARGET’ 3. deduced from the input file  File: binutils.info, Node: Architecture Selection, Prev: Target Selection, Up: Selecting the Target System 17.2 Architecture Selection =========================== An “architecture” is a type of CPU on which an object file is to run. Its name may contain a colon, separating the name of the processor family from the name of the particular CPU. The command to list valid architecture values is ‘objdump -i’ (the second column contains the relevant information). Sample values: ‘m68k:68020’, ‘mips:3000’, ‘sparc’. ‘objdump’ Architecture ---------------------- Ways to specify: 1. command-line option: ‘-m’ or ‘--architecture’ 2. deduced from the input file ‘objcopy’, ‘nm’, ‘size’, ‘strings’ Architecture ----------------------------------------------- Ways to specify: 1. deduced from the input file  File: binutils.info, Node: debuginfod, Next: Reporting Bugs, Prev: Selecting the Target System, Up: Top 18 debuginfod ************* debuginfod is a web service that indexes ELF/DWARF debugging resources by build-id and serves them over HTTP. For more information see: _https://sourceware.org/elfutils/Debuginfod.html_ Binutils can be built with the debuginfod client library ‘libdebuginfod’ using the ‘--with-debuginfod’ configure option. This option is enabled by default if ‘libdebuginfod’ is installed and found at configure time. This allows ‘objdump’ and ‘readelf’ to automatically query debuginfod servers for separate debug files when the files are otherwise not found. debuginfod is packaged with elfutils, starting with version 0.178. You can get the latest version from ‘https://sourceware.org/elfutils/’. The DWARF info dumping tools (‘readelf’ and ‘objdump’) have options to control when they should access the debuginfod servers. By default this access is enabled.  File: binutils.info, Node: Reporting Bugs, Next: GNU Free Documentation License, Prev: debuginfod, Up: Top 19 Reporting Bugs ***************** Your bug reports play an essential role in making the binary utilities reliable. Reporting a bug may help you by bringing a solution to your problem, or it may not. But in any case the principal function of a bug report is to help the entire community by making the next version of the binary utilities work better. Bug reports are your contribution to their maintenance. In order for a bug report to serve its purpose, you must include the information that enables us to fix the bug. * Menu: * Bug Criteria:: Have you found a bug? * Bug Reporting:: How to report bugs  File: binutils.info, Node: Bug Criteria, Next: Bug Reporting, Up: Reporting Bugs 19.1 Have You Found a Bug? ========================== If you are not sure whether you have found a bug, here are some guidelines: • If a binary utility gets a fatal signal, for any input whatever, that is a bug. Reliable utilities never crash. • If a binary utility produces an error message for valid input, that is a bug. • If you are an experienced user of binary utilities, your suggestions for improvement are welcome in any case.  File: binutils.info, Node: Bug Reporting, Prev: Bug Criteria, Up: Reporting Bugs 19.2 How to Report Bugs ======================= A number of companies and individuals offer support for GNU products. If you obtained the binary utilities from a support organization, we recommend you contact that organization first. You can find contact information for many support companies and individuals in the file ‘etc/SERVICE’ in the GNU Emacs distribution. In any event, we also recommend that you send bug reports for the binary utilities to . The fundamental principle of reporting bugs usefully is this: *report all the facts*. If you are not sure whether to state a fact or leave it out, state it! Often people omit facts because they think they know what causes the problem and assume that some details do not matter. Thus, you might assume that the name of a file you use in an example does not matter. Well, probably it does not, but one cannot be sure. Perhaps the bug is a stray memory reference which happens to fetch from the location where that pathname is stored in memory; perhaps, if the pathname were different, the contents of that location would fool the utility into doing the right thing despite the bug. Play it safe and give a specific, complete example. That is the easiest thing for you to do, and the most helpful. Keep in mind that the purpose of a bug report is to enable us to fix the bug if it is new to us. Therefore, always write your bug reports on the assumption that the bug has not been reported previously. Sometimes people give a few sketchy facts and ask, “Does this ring a bell?” This cannot help us fix a bug, so it is basically useless. We respond by asking for enough details to enable us to investigate. You might as well expedite matters by sending them to begin with. To enable us to fix the bug, you should include all these things: • The version of the utility. Each utility announces it if you start it with the ‘--version’ argument. Without this, we will not know whether there is any point in looking for the bug in the current version of the binary utilities. • Any patches you may have applied to the source, including any patches made to the ‘BFD’ library. • The type of machine you are using, and the operating system name and version number. • What compiler (and its version) was used to compile the utilities—e.g. “‘gcc-2.7’”. • The command arguments you gave the utility to observe the bug. To guarantee you will not omit something important, list them all. A copy of the Makefile (or the output from make) is sufficient. If we were to try to guess the arguments, we would probably guess wrong and then we might not encounter the bug. • A complete input file, or set of input files, that will reproduce the bug. If the utility is reading an object file or files, then it is generally most helpful to send the actual object files. If the source files were produced exclusively using GNU programs (e.g., ‘gcc’, ‘gas’, and/or the GNU ‘ld’), then it may be OK to send the source files rather than the object files. In this case, be sure to say exactly what version of ‘gcc’, or whatever, was used to produce the object files. Also say how ‘gcc’, or whatever, was configured. • A description of what behavior you observe that you believe is incorrect. For example, “It gets a fatal signal.” Of course, if the bug is that the utility gets a fatal signal, then we will certainly notice it. But if the bug is incorrect output, we might not notice unless it is glaringly wrong. You might as well not give us a chance to make a mistake. Even if the problem you experience is a fatal signal, you should still say so explicitly. Suppose something strange is going on, such as your copy of the utility is out of sync, or you have encountered a bug in the C library on your system. (This has happened!) Your copy might crash and ours would not. If you told us to expect a crash, then when ours fails to crash, we would know that the bug was not happening for us. If you had not told us to expect a crash, then we would not be able to draw any conclusion from our observations. • If you wish to suggest changes to the source, send us context diffs, as generated by ‘diff’ with the ‘-u’, ‘-c’, or ‘-p’ option. Always send diffs from the old file to the new file. If you wish to discuss something in the ‘ld’ source, refer to it by context, not by line number. The line numbers in our development sources will not match those in your sources. Your line numbers would convey no useful information to us. Here are some things that are not necessary: • A description of the envelope of the bug. Often people who encounter a bug spend a lot of time investigating which changes to the input file will make the bug go away and which changes will not affect it. This is often time consuming and not very useful, because the way we will find the bug is by running a single example under the debugger with breakpoints, not by pure deduction from a series of examples. We recommend that you save your time for something else. Of course, if you can find a simpler example to report _instead_ of the original one, that is a convenience for us. Errors in the output will be easier to spot, running under the debugger will take less time, and so on. However, simplification is not vital; if you do not want to do this, report the bug anyway and send us the entire test case you used. • A patch for the bug. A patch for the bug does help us if it is a good one. But do not omit the necessary information, such as the test case, on the assumption that a patch is all we need. We might see problems with your patch and decide to fix the problem another way, or we might not understand it at all. Sometimes with programs as complicated as the binary utilities it is very hard to construct an example that will make the program follow a certain path through the code. If you do not send us the example, we will not be able to construct one, so we will not be able to verify that the bug is fixed. And if we cannot understand what bug you are trying to fix, or why your patch should be an improvement, we will not install it. A test case will help us to understand. • A guess about what the bug is or what it depends on. Such guesses are usually wrong. Even we cannot guess right about such things without first using the debugger to find the facts.  File: binutils.info, Node: GNU Free Documentation License, Next: Binutils Index, Prev: Reporting Bugs, Up: Top Appendix A GNU Free Documentation License ***************************************** Version 1.3, 3 November 2008 Copyright © 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc. Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. 0. PREAMBLE The purpose of this License is to make a manual, textbook, or other functional and useful document “free” in the sense of freedom: to assure everyone the effective freedom to copy and redistribute it, with or without modifying it, either commercially or noncommercially. Secondarily, this License preserves for the author and publisher a way to get credit for their work, while not being considered responsible for modifications made by others. This License is a kind of “copyleft”, which means that derivative works of the document must themselves be free in the same sense. It complements the GNU General Public License, which is a copyleft license designed for free software. We have designed this License in order to use it for manuals for free software, because free software needs free documentation: a free program should come with manuals providing the same freedoms that the software does. But this License is not limited to software manuals; it can be used for any textual work, regardless of subject matter or whether it is published as a printed book. We recommend this License principally for works whose purpose is instruction or reference. 1. APPLICABILITY AND DEFINITIONS This License applies to any manual or other work, in any medium, that contains a notice placed by the copyright holder saying it can be distributed under the terms of this License. Such a notice grants a world-wide, royalty-free license, unlimited in duration, to use that work under the conditions stated herein. The “Document”, below, refers to any such manual or work. Any member of the public is a licensee, and is addressed as “you”. You accept the license if you copy, modify or distribute the work in a way requiring permission under copyright law. A “Modified Version” of the Document means any work containing the Document or a portion of it, either copied verbatim, or with modifications and/or translated into another language. A “Secondary Section” is a named appendix or a front-matter section of the Document that deals exclusively with the relationship of the publishers or authors of the Document to the Document’s overall subject (or to related matters) and contains nothing that could fall directly within that overall subject. (Thus, if the Document is in part a textbook of mathematics, a Secondary Section may not explain any mathematics.) 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Termination of your rights under this section does not terminate the licenses of parties who have received copies or rights from you under this License. If your rights have been terminated and not permanently reinstated, receipt of a copy of some or all of the same material does not give you any rights to use it. 10. FUTURE REVISIONS OF THIS LICENSE The Free Software Foundation may publish new, revised versions of the GNU Free Documentation License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. See . Each version of the License is given a distinguishing version number. If the Document specifies that a particular numbered version of this License “or any later version” applies to it, you have the option of following the terms and conditions either of that specified version or of any later version that has been published (not as a draft) by the Free Software Foundation. If the Document does not specify a version number of this License, you may choose any version ever published (not as a draft) by the Free Software Foundation. If the Document specifies that a proxy can decide which future versions of this License can be used, that proxy’s public statement of acceptance of a version permanently authorizes you to choose that version for the Document. 11. RELICENSING “Massive Multiauthor Collaboration Site” (or “MMC Site”) means any World Wide Web server that publishes copyrightable works and also provides prominent facilities for anybody to edit those works. A public wiki that anybody can edit is an example of such a server. A “Massive Multiauthor Collaboration” (or “MMC”) contained in the site means any set of copyrightable works thus published on the MMC site. “CC-BY-SA” means the Creative Commons Attribution-Share Alike 3.0 license published by Creative Commons Corporation, a not-for-profit corporation with a principal place of business in San Francisco, California, as well as future copyleft versions of that license published by that same organization. “Incorporate” means to publish or republish a Document, in whole or in part, as part of another Document. An MMC is “eligible for relicensing” if it is licensed under this License, and if all works that were first published under this License somewhere other than this MMC, and subsequently incorporated in whole or in part into the MMC, (1) had no cover texts or invariant sections, and (2) were thus incorporated prior to November 1, 2008. The operator of an MMC Site may republish an MMC contained in the site under CC-BY-SA on the same site at any time before August 1, 2009, provided the MMC is eligible for relicensing. ADDENDUM: How to use this License for your documents ==================================================== To use this License in a document you have written, include a copy of the License in the document and put the following copyright and license notices just after the title page: Copyright (C) YEAR YOUR NAME. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled ``GNU Free Documentation License''. If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts, replace the “with...Texts.” line with this: with the Invariant Sections being LIST THEIR TITLES, with the Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST. If you have Invariant Sections without Cover Texts, or some other combination of the three, merge those two alternatives to suit the situation. If your document contains nontrivial examples of program code, we recommend releasing these examples in parallel under your choice of free software license, such as the GNU General Public License, to permit their use in free software.  File: binutils.info, Node: Binutils Index, Prev: GNU Free Documentation License, Up: Top Binutils Index ************** [index] * Menu: * –enable-deterministic-archives: ar cmdline. (line 150) * –enable-deterministic-archives <1>: ar cmdline. (line 238) * –enable-deterministic-archives <2>: objcopy. (line 364) * –enable-deterministic-archives <3>: objcopy. (line 374) * –enable-deterministic-archives <4>: ranlib. (line 32) * –enable-deterministic-archives <5>: ranlib. (line 44) * –enable-deterministic-archives <6>: strip. (line 163) * –enable-deterministic-archives <7>: strip. (line 173) * .stab: objdump. (line 793) * Add prefix to absolute paths: objdump. (line 538) * addr2line: addr2line. (line 6) * address to file name and line number: addr2line. (line 6) * all header information, object file: objdump. (line 931) * ar: ar. (line 6) * ar compatibility: ar. (line 63) * architecture: objdump. (line 275) * architectures available: objdump. (line 252) * archive contents: ranlib. (line 6) * Archive file symbol index information: readelf. (line 273) * archive headers: objdump. (line 84) * archives: ar. (line 6) * base files: dlltool. (line 125) * bug criteria: Bug Criteria. (line 6) * bug reports: Bug Reporting. (line 6) * bugs: Reporting Bugs. (line 6) * bugs, reporting: Bug Reporting. (line 6) * c++filt: c++filt. (line 6) * changing object addresses: objcopy. (line 411) * changing section address: objcopy. (line 421) * changing section LMA: objcopy. (line 430) * changing section VMA: objcopy. (line 443) * changing start address: objcopy. (line 405) * collections of files: ar. (line 6) * Compact Type Format: objdump. (line 764) * Compact Type Format <1>: readelf. (line 457) * compatibility, ar: ar. (line 63) * contents of archive: ar cmdline. (line 97) * crash: Bug Criteria. (line 9) * creating archives: ar cmdline. (line 144) * creating thin archive: ar cmdline. (line 314) * CTF: objdump. (line 764) * CTF <1>: readelf. (line 457) * cxxfilt: c++filt. (line 16) * dates in archive: ar cmdline. (line 188) * debug symbols: objdump. (line 793) * debugging symbols: nm. (line 190) * deleting from archive: ar cmdline. (line 26) * demangling C++ symbols: c++filt. (line 6) * demangling in nm: nm. (line 198) * demangling in nm <1>: readelf. (line 140) * demangling in objdump: objdump. (line 112) * demangling in objdump <1>: addr2line. (line 91) * deterministic archives: ar cmdline. (line 150) * deterministic archives <1>: ar cmdline. (line 238) * deterministic archives <2>: objcopy. (line 364) * deterministic archives <3>: objcopy. (line 374) * deterministic archives <4>: ranlib. (line 32) * deterministic archives <5>: ranlib. (line 44) * deterministic archives <6>: strip. (line 163) * deterministic archives <7>: strip. (line 173) * disassembling object code: objdump. (line 153) * disassembly architecture: objdump. (line 275) * disassembly endianness: objdump. (line 202) * disassembly, with source: objdump. (line 523) * disassembly, with source <1>: objdump. (line 531) * discarding symbols: strip. (line 6) * DLL: dlltool. (line 6) * dlltool: dlltool. (line 6) * dynamic relocation entries, in object file: objdump. (line 510) * dynamic symbol table entries, printing: objdump. (line 892) * dynamic symbols: nm. (line 228) * ELF dynamic section information: readelf. (line 213) * ELF dynamic symbol table information: readelf. (line 120) * ELF file header information: readelf. (line 80) * ELF file information: readelf. (line 6) * ELF notes: readelf. (line 195) * ELF object file format: objdump. (line 793) * ELF program header information: readelf. (line 86) * ELF reloc information: readelf. (line 199) * ELF section group information: readelf. (line 100) * ELF section information: readelf. (line 95) * ELF section information <1>: readelf. (line 105) * ELF segment information: readelf. (line 86) * ELF symbol table information: readelf. (line 110) * ELF version sections information: readelf. (line 217) * elfedit: elfedit. (line 6) * endianness: objdump. (line 202) * error on valid input: Bug Criteria. (line 12) * external symbols: nm. (line 240) * external symbols <1>: nm. (line 316) * external symbols <2>: nm. (line 322) * extract from archive: ar cmdline. (line 114) * fatal signal: Bug Criteria. (line 9) * file name: nm. (line 184) * header information, all: objdump. (line 931) * input .def file: dlltool. (line 121) * input file name: nm. (line 184) * Instruction width: objdump. (line 555) * libraries: ar. (line 25) * listings strings: strings. (line 6) * LTO symbol table: readelf. (line 125) * machine instructions: objdump. (line 153) * moving in archive: ar cmdline. (line 34) * MRI compatibility, ar: ar scripts. (line 8) * name duplication in archive: ar cmdline. (line 108) * name length: ar. (line 18) * nm: nm. (line 6) * nm compatibility: nm. (line 194) * nm compatibility <1>: nm. (line 234) * nm format: nm. (line 194) * nm format <1>: nm. (line 234) * not writing archive index: ar cmdline. (line 217) * objdump: objdump. (line 6) * objdump inlines: nm. (line 268) * object code format: nm. (line 409) * object code format <1>: objdump. (line 98) * object code format <2>: size. (line 107) * object code format <3>: strings. (line 120) * object code format <4>: addr2line. (line 86) * object file header: objdump. (line 208) * object file information: objdump. (line 6) * object file offsets: objdump. (line 213) * object file sections: objdump. (line 517) * object formats available: objdump. (line 252) * offsets of files: ar cmdline. (line 193) * operations on archive: ar cmdline. (line 22) * plugins: ar cmdline. (line 272) * plugins <1>: nm. (line 336) * printing from archive: ar cmdline. (line 46) * printing strings: strings. (line 6) * quick append to archive: ar cmdline. (line 54) * quiet: readelf. (line 90) * radix for section sizes: size. (line 89) * ranlib: ranlib. (line 6) * ranlib <1>: ar cmdline. (line 91) * readelf: readelf. (line 6) * relative placement in archive: ar cmdline. (line 132) * relocation entries, in object file: objdump. (line 504) * removing symbols: strip. (line 6) * repeated names in archive: ar cmdline. (line 108) * replacement in archive: ar cmdline. (line 73) * reporting bugs: Reporting Bugs. (line 6) * scripts, ar: ar scripts. (line 8) * section addresses in objdump: objdump. (line 90) * section headers: objdump. (line 229) * section information: objdump. (line 257) * section sizes: size. (line 6) * sections, full contents: objdump. (line 517) * separate debug files: debuginfod. (line 6) * SFrame: objdump. (line 785) * size: size. (line 6) * size display format: size. (line 29) * size number format: size. (line 89) * sorting symbols: nm. (line 283) * source code context: objdump. (line 222) * source disassembly: objdump. (line 523) * source disassembly <1>: objdump. (line 531) * source file name: nm. (line 184) * source filenames for object files: objdump. (line 269) * stab: objdump. (line 793) * start-address: objdump. (line 802) * stop-address: objdump. (line 806) * strings: strings. (line 6) * strings, printing: strings. (line 6) * strip: strip. (line 6) * Strip absolute paths: objdump. (line 541) * symbol index: ar. (line 31) * symbol index <1>: ranlib. (line 6) * symbol index, listing: nm. (line 305) * symbol line numbers: nm. (line 260) * symbol table entries, printing: objdump. (line 811) * symbol table size base: readelf. (line 128) * symbols: nm. (line 6) * symbols, discarding: strip. (line 6) * thin archives: ar. (line 43) * undefined symbols: nm. (line 316) * undefined symbols <1>: nm. (line 322) * Unix compatibility, ar: ar cmdline. (line 8) * unwind information: readelf. (line 204) * Update ELF header: elfedit. (line 6) * updating an archive: ar cmdline. (line 229) * version: Top. (line 6) * VMA in objdump: objdump. (line 90) * wide output, printing: objdump. (line 937) * writing archive index: ar cmdline. (line 211)  Tag Table: Node: Top1839 Node: ar3580 Node: ar cmdline7012 Node: ar scripts20899 Node: nm26905 Node: objcopy43231 Node: objdump85714 Node: ranlib125523 Node: size127220 Node: strings131606 Node: strip137694 Node: c++filt148093 Ref: c++filt-Footnote-1154156 Node: addr2line154270 Node: windmc160473 Node: windres164406 Node: dlltool171414 Node: def file format185469 Node: readelf188219 Node: elfedit208290 Node: Common Options211860 Node: Selecting the Target System212906 Node: Target Selection213846 Node: Architecture Selection215971 Node: debuginfod216847 Node: Reporting Bugs217881 Node: Bug Criteria218643 Node: Bug Reporting219202 Node: GNU Free Documentation License226159 Node: Binutils Index251522  End Tag Table  Local Variables: coding: utf-8 End: