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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,146 @@ NM(1) General Commands Manual NM(1) NAME nm - display name list (symbol table) SYNOPSIS llvm-nm [ -agnoprumxjlPA ] [ - ] [ -t format ] [[ -arch arch_flag ]...] [ file ... ] [ -s segname sectname ] nm-classic [ -agnoprumxjlfPA [ s segname sectname ]] [ - ] [ -t format ] [[ -arch arch_flag ]...] [ file ... ] DESCRIPTION As of Xcode 8.0 the default nm(1) tool is llvm-nm(1). For the most part nm(1) and llvm-nm(1) have the same options; notable exceptions include -f, -s, and -L as described below. This document explains options common between the two commands as well as some historically relevant options supported by nm-classic(1). More help on options for llvm-nm(1) is provided when running it with the --help option. nm displays the name list (symbol table of nlist structures) of each object file in the argument list. In some cases, as with an object that has had strip(1) with its -T option used on the object, that can be different than the dyld information. For that information use dyldinfo(1). If an argument is an archive, a listing for each object file in the archive will be produced. File can be of the form libx.a(x.o), in which case only symbols from that member of the object file are listed. (The parentheses have to be quoted to get by the shell.) If no file is given, the symbols in a.out are listed. Each symbol name is preceded by its value (blanks if undefined). Unless the -m option is specified, this value is followed by one of the following characters, representing the symbol type: U (undefined), A (absolute), T (text section symbol), D (data section symbol), B (bss section symbol), C (common symbol), - (for debugger symbol table entries; see -a below), S (symbol in a section other than those above), or I (indirect symbol). If the symbol is local (non-external), the symbol's type is instead represented by the corresponding lowercase letter. A lower case u in a dynamic shared library indicates a undefined reference to a private external in another module in the same library. If the symbol is a Objective-C method, the symbol name is ±[Class_name(category_name) method:name:], where `+' is for class methods, `-' is for instance methods, and (category_name) is present only when the method is in a category. The output is sorted alphabetically by default. Options are: -a Display all symbol table entries, including those inserted for use by debuggers. -g Display only global (external) symbols. -n Sort numerically rather than alphabetically. -o Prepend file or archive element name to each output line, rather than only once. -p Don't sort; display in symbol-table order. -r Sort in reverse order. -u Display only undefined symbols. -U Don't display undefined symbols. -m Display the N_SECT type symbols (Mach-O symbols) as (segment_name, section_name) followed by either external or non-external and then the symbol name. Undefined, common, absolute and indirect symbols get displayed as (undefined), (common), (absolute), and (indirect), respectively. Other symbol details are displayed in a human-friendly manner, such as "[no dead strip]". nm will display the referenced symbol for indirect symbols and will display the name of the library expected to provide an undefined symbol. See nlist(3) and <mach-o/nlist.h> for more information on the nlist structure. -x Display the symbol table entry's fields in hexadecimal, along with the name as a string. -j Just display the symbol names (no value or type). -s segname sectname List only those symbols in the section (segname,sectname). For llvm-nm(1) this option must be last on the command line, and after the files. -l List a pseudo symbol .section_start if no symbol has as its value the starting address of the section. (This is used with the -s option above.) -arch arch_type Specifies the architecture, arch_type, of the file for nm(1) to operate on when the file is a universal file (see arch(3) for the currently known arch_types). The arch_type can be "all" to operate on all architectures in the file. The default is to display the symbols from only the host architecture, if the file contains it; otherwise, symbols for all architectures in the file are displayed. -f format For llvm-nm(1) this specifies the output format. Where format can be bsd, sysv, posix or darwin. -f For nm-classic(1) this displays the symbol table of a dynamic library flat (as one file not separate modules). This is obsolete and not supported with llvm-nm(1). -A Write the pathname or library name of an object on each line. -P Write information in a portable output format. -t format For the -P output, write the numeric value in the specified format. The format shall be dependent on the single character used as the format option-argument: d The value shall be written in decimal (default). o The value shall be written in octal. x The value shall be written in hexadecimal. -L Display the symbols in the bitcode files in the (__LLVM,__bundle) section if present instead of the object's symbol table. For nm-classic(1) this is the default if the object has no symbol table and an (__LLVM,__bundle) section exists. This option is not supported by llvm-nm(1) where displaying llvm bitcode symbols is the default behavior. SEE ALSO ar(1), ar(5), Mach-O(5), stab(5), nlist(3), dyldinfo(1) BUGS Displaying Mach-O symbols with -m is too verbose. Without the -m, symbols in the Objective-C sections get displayed as an `s'. Apple, Inc. December 13, 2018 NM(1) This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,179 @@ OTOOL-CLASSIC(1) General Commands Manual OTOOL-CLASSIC(1) NAME otool-classic - object file displaying tool SYNOPSIS otool-classic [ option ... ] [ file ... ] DESCRIPTION The otool-classic command displays specified parts of object files or libraries. It is the preferred tool for inspecting Mach-O binaries, especially for binaries that are bad, corrupted, or fuzzed. It is also useful in situations when inspecting files with new or "bleeding-edge" Mach-O file format changes. For historical reasons, the LLVM-based llvm-objdump(1) tool does support displaying Mach-O information in an "otool-compatibility" mode. For more information on using llvm-objdump(1) in this way, see the llvm-otool(1) command-line shim. Note that llvm-objdump(1) is incapable of displaying information in all Mach-O files. If the -m option is not used the file arguments may be of the form libx.a(foo.o), to request information about only that object file and not the entire library. (Typically this argument must be quoted, ``libx.a(foo.o)'', to get it past the shell.) Otool-classic understands both Mach-O (Mach object) files and universal file formats. Otool-classic can display the specified information in either its raw (numeric) form (without the -v flag), or in a symbolic form using macro names of constants, etc. (with the -v or -V flag). At least one of the following options must be specified: -a Display the archive header, if the file is an archive. -S Display the contents of the `__.SYMDEF' file, if the file is an archive. -f Display the universal headers. -h Display the Mach header. -l Display the load commands. -L Display the names and version numbers of the shared libraries that the object file uses, as well as the shared library ID if the file is a shared library. -D Display just the install name of a shared library. See install_name_tool(1) for more info. -s segname sectname Display the contents of the section (segname,sectname). If the -v flag is specified, the section is displayed as its type, unless the type is zero (the section header flags). Also the sections (__OBJC,__protocol), (__OBJC,__string_object) and (__OBJC,__runtime_setup) are displayed symbolically if the -v flag is specified. For unknown section types, if the -V flag is specified, the contents of the section are displayed in a canonical hex+ASCII display, where a column of hexadecimal values print along side a column of ASCII characters. -t Display the contents of the (__TEXT,__text) section. With the -v flag, this disassembles the text. With the -V flag, it also symbolically disassembles the operands. -x Display the contents of every __text section found in the file. This is useful when looking at the Mach kernel and other files with __text sections in more than one segment, or where the __text section is somewhere other than __TEXT. When used with the -v flag, this disassembles the text. When used with the -V flag, it also symbolically disassembles the operands. -d Display the contents of the (__DATA,__data) section. -o Display the contents of the __OBJC segment used by the Objective-C run-time system. -r Display the relocation entries. -c Display the argument strings (argv[] and envp[]) from a core file. -I Display the indirect symbol table. -T Display the table of contents for a dynamically linked shared library. -R Display the reference table of a dynamically linked shared library. -M Display the module table of a dynamically linked shared library. -H Display the two-level namespace hints table. -G Display the data in code table. -C Display the linker optimization hints (-v for verbose mode can also be added). -P Print the info plist section, (__TEXT,__info_plist), as strings. -dyld_info Print bind and rebase information used by dyld to resolve external references in a final linked binary. -dyld_opcodes Print raw dyld bind and rebase opcodes present in a final linked binary. These opcodes are stored in a region pointed to by LC_DYLD_INFO* load commands. -show-latency When doing disassembly print latency annotations for instructions. -chained_fixups Print raw chained fixup data present in a final linked binary built with chained fixups. The chained fixup data are stored either in a region pointed to by the LC_DYLD_CHAINED_FIXUPS load command or in a (__TEXT,__chain_starts) section. This data includes the fixup chain's starting location on each page by segment and symbol information for each bind. Use the -dyld_info option to see the individual links in each chain. The following options may also be given: -j When doing disassembly print the opcode bytes of the instructions. -m The object file names are not assumed to be in the archive(member) syntax, which allows file names containing parenthesis. -p name Used with the -t and -v or -V options to start the disassembly from symbol name and continue to the end of the (__TEXT,__text) section. This option can also be used with the -x option to begin disassembly from symbol name in any segment where a __text section is found. -q Use the llvm disassembler when doing disassembly; this is available for the x86 and arm architectures. This is the default. -Q Use otool-classic(1)'s disassembler when doing disassembly. -v Display verbosely (symbolically) when possible. -V Display the disassembled operands symbolically (this implies the -v option). This is useful with the -s, -t, and -x options. -X Don't print leading addresses or headers with disassembly of sections. -addr_slide=arg When disassembling a binary using the -s, -t, or -o options, add an arbitrary slide to each pointer value when it is displayed. This is useful for matching otool output with that from a running process. -arch arch_type Specifies the architecture, arch_type, of the file for otool-classic(1) to operate on when the file is a universal file (aka a file with multiple architectures). (See arch(3) for the currently known arch_types.) The arch_type can be "all" to operate on all architectures in the file. The default is to display only the host architecture, if the file contains it; otherwise, all architectures in the file are shown. -function_offsets When doing disassembly print the decimal offset from the last label printed. -mcpu=arg When doing disassembly using the llvm disassembler use the cpu arg. --version Print the otool-classic(1) version information. SEE ALSO dyld(1), install_name_tool(1), libtool(1), lipo(1), llvm-otool(1), and vtool(1)