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534 lines
20 KiB
Groff
534 lines
20 KiB
Groff
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.\" ========================================================================
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.\"
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.IX Title "DLLTOOL 1"
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.TH DLLTOOL 1 "2020-07-13" "binutils-2.32" "GNU Development Tools"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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dlltool \- Create files needed to build and use DLLs.
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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dlltool [\fB\-d\fR|\fB\-\-input\-def\fR \fIdef-file-name\fR]
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[\fB\-b\fR|\fB\-\-base\-file\fR \fIbase-file-name\fR]
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[\fB\-e\fR|\fB\-\-output\-exp\fR \fIexports-file-name\fR]
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[\fB\-z\fR|\fB\-\-output\-def\fR \fIdef-file-name\fR]
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[\fB\-l\fR|\fB\-\-output\-lib\fR \fIlibrary-file-name\fR]
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[\fB\-y\fR|\fB\-\-output\-delaylib\fR \fIlibrary-file-name\fR]
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[\fB\-\-export\-all\-symbols\fR] [\fB\-\-no\-export\-all\-symbols\fR]
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[\fB\-\-exclude\-symbols\fR \fIlist\fR]
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[\fB\-\-no\-default\-excludes\fR]
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[\fB\-S\fR|\fB\-\-as\fR \fIpath-to-assembler\fR] [\fB\-f\fR|\fB\-\-as\-flags\fR \fIoptions\fR]
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[\fB\-D\fR|\fB\-\-dllname\fR \fIname\fR] [\fB\-m\fR|\fB\-\-machine\fR \fImachine\fR]
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[\fB\-a\fR|\fB\-\-add\-indirect\fR]
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[\fB\-U\fR|\fB\-\-add\-underscore\fR] [\fB\-\-add\-stdcall\-underscore\fR]
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[\fB\-k\fR|\fB\-\-kill\-at\fR] [\fB\-A\fR|\fB\-\-add\-stdcall\-alias\fR]
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[\fB\-p\fR|\fB\-\-ext\-prefix\-alias\fR \fIprefix\fR]
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[\fB\-x\fR|\fB\-\-no\-idata4\fR] [\fB\-c\fR|\fB\-\-no\-idata5\fR]
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[\fB\-\-use\-nul\-prefixed\-import\-tables\fR]
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[\fB\-I\fR|\fB\-\-identify\fR \fIlibrary-file-name\fR] [\fB\-\-identify\-strict\fR]
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[\fB\-i\fR|\fB\-\-interwork\fR]
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[\fB\-n\fR|\fB\-\-nodelete\fR] [\fB\-t\fR|\fB\-\-temp\-prefix\fR \fIprefix\fR]
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[\fB\-v\fR|\fB\-\-verbose\fR]
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[\fB\-h\fR|\fB\-\-help\fR] [\fB\-V\fR|\fB\-\-version\fR]
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[\fB\-\-no\-leading\-underscore\fR] [\fB\-\-leading\-underscore\fR]
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[object\-file ...]
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\fBdlltool\fR reads its inputs, which can come from the \fB\-d\fR and
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\&\fB\-b\fR options as well as object files specified on the command
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line. It then processes these inputs and if the \fB\-e\fR option has
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been specified it creates a exports file. If the \fB\-l\fR option
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has been specified it creates a library file and if the \fB\-z\fR option
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has been specified it creates a def file. Any or all of the \fB\-e\fR,
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\&\fB\-l\fR and \fB\-z\fR options can be present in one invocation of
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dlltool.
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.PP
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When creating a \s-1DLL\s0, along with the source for the \s-1DLL\s0, it is necessary
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to have three other files. \fBdlltool\fR can help with the creation of
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these files.
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.PP
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The first file is a \fI.def\fR file which specifies which functions are
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exported from the \s-1DLL\s0, which functions the \s-1DLL\s0 imports, and so on. This
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is a text file and can be created by hand, or \fBdlltool\fR can be used
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to create it using the \fB\-z\fR option. In this case \fBdlltool\fR
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will scan the object files specified on its command line looking for
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those functions which have been specially marked as being exported and
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put entries for them in the \fI.def\fR file it creates.
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.PP
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In order to mark a function as being exported from a \s-1DLL\s0, it needs to
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have an \fB\-export:<name_of_function>\fR entry in the \fB.drectve\fR
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section of the object file. This can be done in C by using the
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\&\fIasm()\fR operator:
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.PP
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.Vb 2
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\& asm (".section .drectve");
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\& asm (".ascii \e"\-export:my_func\e"");
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\&
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\& int my_func (void) { ... }
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.Ve
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.PP
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The second file needed for \s-1DLL\s0 creation is an exports file. This file
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is linked with the object files that make up the body of the \s-1DLL\s0 and it
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handles the interface between the \s-1DLL\s0 and the outside world. This is a
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binary file and it can be created by giving the \fB\-e\fR option to
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\&\fBdlltool\fR when it is creating or reading in a \fI.def\fR file.
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.PP
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The third file needed for \s-1DLL\s0 creation is the library file that programs
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will link with in order to access the functions in the \s-1DLL\s0 (an `import
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library'). This file can be created by giving the \fB\-l\fR option to
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dlltool when it is creating or reading in a \fI.def\fR file.
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.PP
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If the \fB\-y\fR option is specified, dlltool generates a delay-import
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library that can be used instead of the normal import library to allow
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a program to link to the dll only as soon as an imported function is
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called for the first time. The resulting executable will need to be
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linked to the static delayimp library containing _\|\fI_delayLoadHelper2()\fR,
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which in turn will import LoadLibraryA and GetProcAddress from kernel32.
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.PP
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\&\fBdlltool\fR builds the library file by hand, but it builds the
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exports file by creating temporary files containing assembler statements
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and then assembling these. The \fB\-S\fR command-line option can be
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used to specify the path to the assembler that dlltool will use,
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and the \fB\-f\fR option can be used to pass specific flags to that
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assembler. The \fB\-n\fR can be used to prevent dlltool from deleting
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these temporary assembler files when it is done, and if \fB\-n\fR is
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specified twice then this will prevent dlltool from deleting the
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temporary object files it used to build the library.
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.PP
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Here is an example of creating a \s-1DLL\s0 from a source file \fBdll.c\fR and
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also creating a program (from an object file called \fBprogram.o\fR)
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that uses that \s-1DLL:\s0
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.PP
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.Vb 4
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\& gcc \-c dll.c
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\& dlltool \-e exports.o \-l dll.lib dll.o
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\& gcc dll.o exports.o \-o dll.dll
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\& gcc program.o dll.lib \-o program
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.Ve
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.PP
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\&\fBdlltool\fR may also be used to query an existing import library
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to determine the name of the \s-1DLL\s0 to which it is associated. See the
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description of the \fB\-I\fR or \fB\-\-identify\fR option.
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.SH "OPTIONS"
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.IX Header "OPTIONS"
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The command-line options have the following meanings:
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.IP "\fB\-d\fR \fIfilename\fR" 4
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.IX Item "-d filename"
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.PD 0
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.IP "\fB\-\-input\-def\fR \fIfilename\fR" 4
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.IX Item "--input-def filename"
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.PD
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Specifies the name of a \fI.def\fR file to be read in and processed.
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.IP "\fB\-b\fR \fIfilename\fR" 4
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.IX Item "-b filename"
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.PD 0
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.IP "\fB\-\-base\-file\fR \fIfilename\fR" 4
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.IX Item "--base-file filename"
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.PD
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Specifies the name of a base file to be read in and processed. The
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contents of this file will be added to the relocation section in the
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exports file generated by dlltool.
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.IP "\fB\-e\fR \fIfilename\fR" 4
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.IX Item "-e filename"
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.PD 0
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.IP "\fB\-\-output\-exp\fR \fIfilename\fR" 4
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.IX Item "--output-exp filename"
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|
.PD
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Specifies the name of the export file to be created by dlltool.
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.IP "\fB\-z\fR \fIfilename\fR" 4
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.IX Item "-z filename"
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|
.PD 0
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|
.IP "\fB\-\-output\-def\fR \fIfilename\fR" 4
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|
.IX Item "--output-def filename"
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|
.PD
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Specifies the name of the \fI.def\fR file to be created by dlltool.
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.IP "\fB\-l\fR \fIfilename\fR" 4
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.IX Item "-l filename"
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|
.PD 0
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|
.IP "\fB\-\-output\-lib\fR \fIfilename\fR" 4
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|
.IX Item "--output-lib filename"
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|
.PD
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Specifies the name of the library file to be created by dlltool.
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|
.IP "\fB\-y\fR \fIfilename\fR" 4
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|
.IX Item "-y filename"
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|
.PD 0
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|
.IP "\fB\-\-output\-delaylib\fR \fIfilename\fR" 4
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|
.IX Item "--output-delaylib filename"
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|
.PD
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Specifies the name of the delay-import library file to be created by dlltool.
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.IP "\fB\-\-export\-all\-symbols\fR" 4
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.IX Item "--export-all-symbols"
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|
Treat all global and weak defined symbols found in the input object
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files as symbols to be exported. There is a small list of symbols which
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are not exported by default; see the \fB\-\-no\-default\-excludes\fR
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option. You may add to the list of symbols to not export by using the
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\&\fB\-\-exclude\-symbols\fR option.
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.IP "\fB\-\-no\-export\-all\-symbols\fR" 4
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.IX Item "--no-export-all-symbols"
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Only export symbols explicitly listed in an input \fI.def\fR file or in
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\&\fB.drectve\fR sections in the input object files. This is the default
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behaviour. The \fB.drectve\fR sections are created by \fBdllexport\fR
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attributes in the source code.
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.IP "\fB\-\-exclude\-symbols\fR \fIlist\fR" 4
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.IX Item "--exclude-symbols list"
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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
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|
\&\fB\-\-export\-all\-symbols\fR is used.
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.IP "\fB\-\-no\-default\-excludes\fR" 4
|
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.IX Item "--no-default-excludes"
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|
When \fB\-\-export\-all\-symbols\fR is used, it will by default avoid
|
|
exporting certain special symbols. The current list of symbols to avoid
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|
exporting is \fBDllMain@12\fR, \fBDllEntryPoint@0\fR,
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|
\&\fBimpure_ptr\fR. You may use the \fB\-\-no\-default\-excludes\fR option
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|
to go ahead and export these special symbols. This is only meaningful
|
|
when \fB\-\-export\-all\-symbols\fR is used.
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.IP "\fB\-S\fR \fIpath\fR" 4
|
|
.IX Item "-S path"
|
|
.PD 0
|
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.IP "\fB\-\-as\fR \fIpath\fR" 4
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|
.IX Item "--as path"
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|
.PD
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Specifies the path, including the filename, of the assembler to be used
|
|
to create the exports file.
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.IP "\fB\-f\fR \fIoptions\fR" 4
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.IX Item "-f options"
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.PD 0
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.IP "\fB\-\-as\-flags\fR \fIoptions\fR" 4
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|
.IX Item "--as-flags options"
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|
.PD
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|
Specifies any specific command-line options to be passed to the
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|
assembler when building the exports file. This option will work even if
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|
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
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|
pass multiple options to the assembler they should be enclosed in
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|
double quotes.
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|
.IP "\fB\-D\fR \fIname\fR" 4
|
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.IX Item "-D name"
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|
.PD 0
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.IP "\fB\-\-dll\-name\fR \fIname\fR" 4
|
|
.IX Item "--dll-name name"
|
|
.PD
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|
Specifies the name to be stored in the \fI.def\fR file as the name of
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|
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.
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|
.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
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|
Specifies the type of machine for which the library file should be
|
|
built. \fBdlltool\fR has a built in default type, depending upon how
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|
it was created, but this option can be used to override that. This is
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|
normally only useful when creating DLLs for an \s-1ARM\s0 processor, when the
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contents of the \s-1DLL\s0 are actually encode using Thumb instructions.
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.IP "\fB\-a\fR" 4
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.IX Item "-a"
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|
.PD 0
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.IP "\fB\-\-add\-indirect\fR" 4
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.IX Item "--add-indirect"
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|
.PD
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Specifies that when \fBdlltool\fR is creating the exports file it
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should add a section which allows the exported functions to be
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referenced without using the import library. Whatever the hell that
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means!
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.IP "\fB\-U\fR" 4
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.IX Item "-U"
|
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.PD 0
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.IP "\fB\-\-add\-underscore\fR" 4
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.IX Item "--add-underscore"
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.PD
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Specifies that when \fBdlltool\fR is creating the exports file it
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should prepend an underscore to the names of \fIall\fR exported symbols.
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.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 \fB@<number>\fR suffixes should be omitted from the names
|
|
of stdcall functions that will be imported from the \s-1DLL\s0. This is
|
|
useful when creating an import library for a \s-1DLL\s0 which exports stdcall
|
|
functions but without the usual \fB@<number>\fR symbol name suffix.
|
|
.Sp
|
|
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).
|
|
.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\-2019 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".
|