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| .\" ======================================================================== |
| .\" |
| .IX Title "DLLTOOL 1" |
| .TH DLLTOOL 1 "2014-08-01" "binutils-2.24.0" "GNU Development Tools" |
| .\" For nroff, turn off justification. Always turn off hyphenation; it makes |
| .\" way too many mistakes in technical documents. |
| .if n .ad l |
| .nh |
| .SH "NAME" |
| dlltool \- Create files needed to build and use DLLs. |
| .SH "SYNOPSIS" |
| .IX Header "SYNOPSIS" |
| dlltool [\fB\-d\fR|\fB\-\-input\-def\fR \fIdef-file-name\fR] |
| [\fB\-b\fR|\fB\-\-base\-file\fR \fIbase-file-name\fR] |
| [\fB\-e\fR|\fB\-\-output\-exp\fR \fIexports-file-name\fR] |
| [\fB\-z\fR|\fB\-\-output\-def\fR \fIdef-file-name\fR] |
| [\fB\-l\fR|\fB\-\-output\-lib\fR \fIlibrary-file-name\fR] |
| [\fB\-y\fR|\fB\-\-output\-delaylib\fR \fIlibrary-file-name\fR] |
| [\fB\-\-export\-all\-symbols\fR] [\fB\-\-no\-export\-all\-symbols\fR] |
| [\fB\-\-exclude\-symbols\fR \fIlist\fR] |
| [\fB\-\-no\-default\-excludes\fR] |
| [\fB\-S\fR|\fB\-\-as\fR \fIpath-to-assembler\fR] [\fB\-f\fR|\fB\-\-as\-flags\fR \fIoptions\fR] |
| [\fB\-D\fR|\fB\-\-dllname\fR \fIname\fR] [\fB\-m\fR|\fB\-\-machine\fR \fImachine\fR] |
| [\fB\-a\fR|\fB\-\-add\-indirect\fR] |
| [\fB\-U\fR|\fB\-\-add\-underscore\fR] [\fB\-\-add\-stdcall\-underscore\fR] |
| [\fB\-k\fR|\fB\-\-kill\-at\fR] [\fB\-A\fR|\fB\-\-add\-stdcall\-alias\fR] |
| [\fB\-p\fR|\fB\-\-ext\-prefix\-alias\fR \fIprefix\fR] |
| [\fB\-x\fR|\fB\-\-no\-idata4\fR] [\fB\-c\fR|\fB\-\-no\-idata5\fR] |
| [\fB\-\-use\-nul\-prefixed\-import\-tables\fR] |
| [\fB\-I\fR|\fB\-\-identify\fR \fIlibrary-file-name\fR] [\fB\-\-identify\-strict\fR] |
| [\fB\-i\fR|\fB\-\-interwork\fR] |
| [\fB\-n\fR|\fB\-\-nodelete\fR] [\fB\-t\fR|\fB\-\-temp\-prefix\fR \fIprefix\fR] |
| [\fB\-v\fR|\fB\-\-verbose\fR] |
| [\fB\-h\fR|\fB\-\-help\fR] [\fB\-V\fR|\fB\-\-version\fR] |
| [\fB\-\-no\-leading\-underscore\fR] [\fB\-\-leading\-underscore\fR] |
| [object\-file ...] |
| .SH "DESCRIPTION" |
| .IX Header "DESCRIPTION" |
| \&\fBdlltool\fR reads its inputs, which can come from the \fB\-d\fR and |
| \&\fB\-b\fR options as well as object files specified on the command |
| line. It then processes these inputs and if the \fB\-e\fR option has |
| been specified it creates a exports file. If the \fB\-l\fR option |
| has been specified it creates a library file and if the \fB\-z\fR option |
| has been specified it creates a def file. Any or all of the \fB\-e\fR, |
| \&\fB\-l\fR and \fB\-z\fR options can be present in one invocation of |
| dlltool. |
| .PP |
| When creating a \s-1DLL,\s0 along with the source for the \s-1DLL,\s0 it is necessary |
| to have three other files. \fBdlltool\fR can help with the creation of |
| these files. |
| .PP |
| The first file is a \fI.def\fR file which specifies which functions are |
| exported from the \s-1DLL,\s0 which functions the \s-1DLL\s0 imports, and so on. This |
| is a text file and can be created by hand, or \fBdlltool\fR can be used |
| to create it using the \fB\-z\fR option. In this case \fBdlltool\fR |
| 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 \fI.def\fR file it creates. |
| .PP |
| In order to mark a function as being exported from a \s-1DLL,\s0 it needs to |
| have an \fB\-export:<name_of_function>\fR entry in the \fB.drectve\fR |
| section of the object file. This can be done in C by using the |
| \&\fIasm()\fR operator: |
| .PP |
| .Vb 2 |
| \& asm (".section .drectve"); |
| \& asm (".ascii \e"\-export:my_func\e""); |
| \& |
| \& int my_func (void) { ... } |
| .Ve |
| .PP |
| The second file needed for \s-1DLL\s0 creation is an exports file. This file |
| is linked with the object files that make up the body of the \s-1DLL\s0 and it |
| handles the interface between the \s-1DLL\s0 and the outside world. This is a |
| binary file and it can be created by giving the \fB\-e\fR option to |
| \&\fBdlltool\fR when it is creating or reading in a \fI.def\fR file. |
| .PP |
| The third file needed for \s-1DLL\s0 creation is the library file that programs |
| will link with in order to access the functions in the \s-1DLL \s0(an `import |
| library'). This file can be created by giving the \fB\-l\fR option to |
| dlltool when it is creating or reading in a \fI.def\fR file. |
| .PP |
| If the \fB\-y\fR 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 _\|\fI_delayLoadHelper2()\fR, |
| which in turn will import LoadLibraryA and GetProcAddress from kernel32. |
| .PP |
| \&\fBdlltool\fR builds the library file by hand, but it builds the |
| exports file by creating temporary files containing assembler statements |
| and then assembling these. The \fB\-S\fR command line option can be |
| used to specify the path to the assembler that dlltool will use, |
| and the \fB\-f\fR option can be used to pass specific flags to that |
| assembler. The \fB\-n\fR can be used to prevent dlltool from deleting |
| these temporary assembler files when it is done, and if \fB\-n\fR is |
| specified twice then this will prevent dlltool from deleting the |
| temporary object files it used to build the library. |
| .PP |
| Here is an example of creating a \s-1DLL\s0 from a source file \fBdll.c\fR and |
| also creating a program (from an object file called \fBprogram.o\fR) |
| that uses that \s-1DLL:\s0 |
| .PP |
| .Vb 4 |
| \& 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 |
| .Ve |
| .PP |
| \&\fBdlltool\fR may also be used to query an existing import library |
| to determine the name of the \s-1DLL\s0 to which it is associated. See the |
| description of the \fB\-I\fR or \fB\-\-identify\fR option. |
| .SH "OPTIONS" |
| .IX Header "OPTIONS" |
| The command line options have the following meanings: |
| .IP "\fB\-d\fR \fIfilename\fR" 4 |
| .IX Item "-d filename" |
| .PD 0 |
| .IP "\fB\-\-input\-def\fR \fIfilename\fR" 4 |
| .IX Item "--input-def filename" |
| .PD |
| Specifies the name of a \fI.def\fR file to be read in and processed. |
| .IP "\fB\-b\fR \fIfilename\fR" 4 |
| .IX Item "-b filename" |
| .PD 0 |
| .IP "\fB\-\-base\-file\fR \fIfilename\fR" 4 |
| .IX Item "--base-file filename" |
| .PD |
| 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. |
| .IP "\fB\-e\fR \fIfilename\fR" 4 |
| .IX Item "-e filename" |
| .PD 0 |
| .IP "\fB\-\-output\-exp\fR \fIfilename\fR" 4 |
| .IX Item "--output-exp filename" |
| .PD |
| Specifies the name of the export file to be created by dlltool. |
| .IP "\fB\-z\fR \fIfilename\fR" 4 |
| .IX Item "-z filename" |
| .PD 0 |
| .IP "\fB\-\-output\-def\fR \fIfilename\fR" 4 |
| .IX Item "--output-def filename" |
| .PD |
| Specifies the name of the \fI.def\fR file to be created by dlltool. |
| .IP "\fB\-l\fR \fIfilename\fR" 4 |
| .IX Item "-l filename" |
| .PD 0 |
| .IP "\fB\-\-output\-lib\fR \fIfilename\fR" 4 |
| .IX Item "--output-lib filename" |
| .PD |
| Specifies the name of the library file to be created by dlltool. |
| .IP "\fB\-y\fR \fIfilename\fR" 4 |
| .IX Item "-y filename" |
| .PD 0 |
| .IP "\fB\-\-output\-delaylib\fR \fIfilename\fR" 4 |
| .IX Item "--output-delaylib filename" |
| .PD |
| Specifies the name of the delay-import library file to be created by dlltool. |
| .IP "\fB\-\-export\-all\-symbols\fR" 4 |
| .IX Item "--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 \fB\-\-no\-default\-excludes\fR |
| option. You may add to the list of symbols to not export by using the |
| \&\fB\-\-exclude\-symbols\fR option. |
| .IP "\fB\-\-no\-export\-all\-symbols\fR" 4 |
| .IX Item "--no-export-all-symbols" |
| Only export symbols explicitly listed in an input \fI.def\fR file or in |
| \&\fB.drectve\fR sections in the input object files. This is the default |
| behaviour. The \fB.drectve\fR sections are created by \fBdllexport\fR |
| attributes in the source code. |
| .IP "\fB\-\-exclude\-symbols\fR \fIlist\fR" 4 |
| .IX Item "--exclude-symbols list" |
| Do not export the symbols in \fIlist\fR. 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 |
| \&\fB\-\-export\-all\-symbols\fR is used. |
| .IP "\fB\-\-no\-default\-excludes\fR" 4 |
| .IX Item "--no-default-excludes" |
| When \fB\-\-export\-all\-symbols\fR is used, it will by default avoid |
| exporting certain special symbols. The current list of symbols to avoid |
| exporting is \fBDllMain@12\fR, \fBDllEntryPoint@0\fR, |
| \&\fBimpure_ptr\fR. You may use the \fB\-\-no\-default\-excludes\fR option |
| to go ahead and export these special symbols. This is only meaningful |
| when \fB\-\-export\-all\-symbols\fR is used. |
| .IP "\fB\-S\fR \fIpath\fR" 4 |
| .IX Item "-S path" |
| .PD 0 |
| .IP "\fB\-\-as\fR \fIpath\fR" 4 |
| .IX Item "--as path" |
| .PD |
| Specifies the path, including the filename, of the assembler to be used |
| to create the exports file. |
| .IP "\fB\-f\fR \fIoptions\fR" 4 |
| .IX Item "-f options" |
| .PD 0 |
| .IP "\fB\-\-as\-flags\fR \fIoptions\fR" 4 |
| .IX Item "--as-flags options" |
| .PD |
| Specifies any specific command line options to be passed to the |
| assembler when building the exports file. This option will work even if |
| the \fB\-S\fR 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. |
| .IP "\fB\-D\fR \fIname\fR" 4 |
| .IX Item "-D name" |
| .PD 0 |
| .IP "\fB\-\-dll\-name\fR \fIname\fR" 4 |
| .IX Item "--dll-name name" |
| .PD |
| Specifies the name to be stored in the \fI.def\fR file as the name of |
| the \s-1DLL\s0 when the \fB\-e\fR option is used. If this option is not |
| present, then the filename given to the \fB\-e\fR option will be |
| used as the name of the \s-1DLL.\s0 |
| .IP "\fB\-m\fR \fImachine\fR" 4 |
| .IX Item "-m machine" |
| .PD 0 |
| .IP "\fB\-machine\fR \fImachine\fR" 4 |
| .IX Item "-machine machine" |
| .PD |
| Specifies the type of machine for which the library file should be |
| built. \fBdlltool\fR 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 \s-1ARM\s0 processor, when the |
| contents of the \s-1DLL\s0 are actually encode using Thumb instructions. |
| .IP "\fB\-a\fR" 4 |
| .IX Item "-a" |
| .PD 0 |
| .IP "\fB\-\-add\-indirect\fR" 4 |
| .IX Item "--add-indirect" |
| .PD |
| Specifies that when \fBdlltool\fR 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! |
| .IP "\fB\-U\fR" 4 |
| .IX Item "-U" |
| .PD 0 |
| .IP "\fB\-\-add\-underscore\fR" 4 |
| .IX Item "--add-underscore" |
| .PD |
| Specifies that when \fBdlltool\fR is creating the exports file it |
| should prepend an underscore to the names of \fIall\fR exported symbols. |
| .IP "\fB\-\-no\-leading\-underscore\fR" 4 |
| .IX Item "--no-leading-underscore" |
| .PD 0 |
| .IP "\fB\-\-leading\-underscore\fR" 4 |
| .IX Item "--leading-underscore" |
| .PD |
| Specifies whether standard symbol should be forced to be prefixed, or |
| not. |
| .IP "\fB\-\-add\-stdcall\-underscore\fR" 4 |
| .IX Item "--add-stdcall-underscore" |
| Specifies that when \fBdlltool\fR is creating the exports file it |
| should prepend an underscore to the names of exported \fIstdcall\fR |
| 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. |
| .IP "\fB\-k\fR" 4 |
| .IX Item "-k" |
| .PD 0 |
| .IP "\fB\-\-kill\-at\fR" 4 |
| .IX Item "--kill-at" |
| .PD |
| Specifies that when \fBdlltool\fR is creating the exports file it |
| should not append the string \fB@ <number>\fR. These numbers are |
| called ordinal numbers and they represent another way of accessing the |
| function in a \s-1DLL,\s0 other than by name. |
| .IP "\fB\-A\fR" 4 |
| .IX Item "-A" |
| .PD 0 |
| .IP "\fB\-\-add\-stdcall\-alias\fR" 4 |
| .IX Item "--add-stdcall-alias" |
| .PD |
| Specifies that when \fBdlltool\fR is creating the exports file it |
| should add aliases for stdcall symbols without \fB@ <number>\fR |
| in addition to the symbols with \fB@ <number>\fR. |
| .IP "\fB\-p\fR" 4 |
| .IX Item "-p" |
| .PD 0 |
| .IP "\fB\-\-ext\-prefix\-alias\fR \fIprefix\fR" 4 |
| .IX Item "--ext-prefix-alias prefix" |
| .PD |
| Causes \fBdlltool\fR to create external aliases for all \s-1DLL\s0 |
| imports with the specified prefix. The aliases are created for both |
| external and import symbols with no leading underscore. |
| .IP "\fB\-x\fR" 4 |
| .IX Item "-x" |
| .PD 0 |
| .IP "\fB\-\-no\-idata4\fR" 4 |
| .IX Item "--no-idata4" |
| .PD |
| Specifies that when \fBdlltool\fR is creating the exports and library |
| files it should omit the \f(CW\*(C`.idata4\*(C'\fR section. This is for compatibility |
| with certain operating systems. |
| .IP "\fB\-\-use\-nul\-prefixed\-import\-tables\fR" 4 |
| .IX Item "--use-nul-prefixed-import-tables" |
| Specifies that when \fBdlltool\fR is creating the exports and library |
| files it should prefix the \f(CW\*(C`.idata4\*(C'\fR and \f(CW\*(C`.idata5\*(C'\fR by zero an |
| element. This emulates old gnu import library generation of |
| \&\f(CW\*(C`dlltool\*(C'\fR. By default this option is turned off. |
| .IP "\fB\-c\fR" 4 |
| .IX Item "-c" |
| .PD 0 |
| .IP "\fB\-\-no\-idata5\fR" 4 |
| .IX Item "--no-idata5" |
| .PD |
| Specifies that when \fBdlltool\fR is creating the exports and library |
| files it should omit the \f(CW\*(C`.idata5\*(C'\fR section. This is for compatibility |
| with certain operating systems. |
| .IP "\fB\-I\fR \fIfilename\fR" 4 |
| .IX Item "-I filename" |
| .PD 0 |
| .IP "\fB\-\-identify\fR \fIfilename\fR" 4 |
| .IX Item "--identify filename" |
| .PD |
| Specifies that \fBdlltool\fR should inspect the import library |
| indicated by \fIfilename\fR and report, on \f(CW\*(C`stdout\*(C'\fR, the name(s) |
| of the associated \s-1DLL\s0(s). This can be performed in addition to any |
| other operations indicated by the other options and arguments. |
| \&\fBdlltool\fR fails if the import library does not exist or is not |
| actually an import library. See also \fB\-\-identify\-strict\fR. |
| .IP "\fB\-\-identify\-strict\fR" 4 |
| .IX Item "--identify-strict" |
| Modifies the behavior of the \fB\-\-identify\fR option, such |
| that an error is reported if \fIfilename\fR is associated with |
| more than one \s-1DLL.\s0 |
| .IP "\fB\-i\fR" 4 |
| .IX Item "-i" |
| .PD 0 |
| .IP "\fB\-\-interwork\fR" 4 |
| .IX Item "--interwork" |
| .PD |
| Specifies that \fBdlltool\fR should mark the objects in the library |
| file and exports file that it produces as supporting interworking |
| between \s-1ARM\s0 and Thumb code. |
| .IP "\fB\-n\fR" 4 |
| .IX Item "-n" |
| .PD 0 |
| .IP "\fB\-\-nodelete\fR" 4 |
| .IX Item "--nodelete" |
| .PD |
| Makes \fBdlltool\fR 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. |
| .IP "\fB\-t\fR \fIprefix\fR" 4 |
| .IX Item "-t prefix" |
| .PD 0 |
| .IP "\fB\-\-temp\-prefix\fR \fIprefix\fR" 4 |
| .IX Item "--temp-prefix prefix" |
| .PD |
| Makes \fBdlltool\fR use \fIprefix\fR when constructing the names of |
| temporary assembler and object files. By default, the temp file prefix |
| is generated from the pid. |
| .IP "\fB\-v\fR" 4 |
| .IX Item "-v" |
| .PD 0 |
| .IP "\fB\-\-verbose\fR" 4 |
| .IX Item "--verbose" |
| .PD |
| Make dlltool describe what it is doing. |
| .IP "\fB\-h\fR" 4 |
| .IX Item "-h" |
| .PD 0 |
| .IP "\fB\-\-help\fR" 4 |
| .IX Item "--help" |
| .PD |
| Displays a list of command line options and then exits. |
| .IP "\fB\-V\fR" 4 |
| .IX Item "-V" |
| .PD 0 |
| .IP "\fB\-\-version\fR" 4 |
| .IX Item "--version" |
| .PD |
| Displays dlltool's version number and then exits. |
| .IP "\fB@\fR\fIfile\fR" 4 |
| .IX Item "@file" |
| Read command-line options from \fIfile\fR. The options read are |
| inserted in place of the original @\fIfile\fR option. If \fIfile\fR |
| does not exist, or cannot be read, then the option will be treated |
| literally, and not removed. |
| .Sp |
| Options in \fIfile\fR 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 \fIfile\fR may itself contain additional |
| @\fIfile\fR options; any such options will be processed recursively. |
| .SH "SEE ALSO" |
| .IX Header "SEE ALSO" |
| The Info pages for \fIbinutils\fR. |
| .SH "COPYRIGHT" |
| .IX Header "COPYRIGHT" |
| Copyright (c) 1991\-2013 Free Software Foundation, Inc. |
| .PP |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the \s-1GNU\s0 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 \*(L"\s-1GNU\s0 Free Documentation License\*(R". |
