82 lines
3.5 KiB
Groff
82 lines
3.5 KiB
Groff
.\" Title: yasm_objfmts
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.\" Author: Peter Johnson <peter@tortall.net>
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.\" Generator: DocBook XSL Stylesheets v1.70.1 <http://docbook.sf.net/>
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.\" Date: February 2007
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.\" Manual: Yasm Supported Object Formats
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.\" Source: Yasm
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.\"
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.TH "YASM_OBJFMTS" "7" "February 2007" "Yasm" "Yasm Supported Object Formats"
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.SH "NAME"
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yasm_objfmts \- Yasm Supported Object Formats
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.SH "SYNOPSIS"
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.HP 5
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\fByasm\fR \fB\-f\ \fR\fB\fIobjfmt\fR\fR \fB\fI...\fR\fR
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.SH "DESCRIPTION"
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.PP
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The standard Yasm distribution includes a number of modules for different object formats (Yasm's primary output).
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.PP
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The object format is selected on the
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\fByasm\fR(1)
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command line by use of the
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\fB\-f \fR\fB\fIobjfmt\fR\fR
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command line option.
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.SH "BIN"
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.PP
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The
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\(lqbin\(rq
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object format produces a flat\-format, non\-relocatable binary file. It is appropriate for producing DOS .COM executables or things like boot blocks. It supports only 3 sections and those sections are written in a predefined order to the output file.
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.SH "COFF"
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.PP
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The COFF object format is an older relocatable object format used on older Unix and compatible systems, and also (more recently) on the DJGPP development system for DOS.
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.SH "DBG"
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.PP
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The
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\(lqdbg\(rq
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object format is not a
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\(lqreal\(rq
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object format; the output file it creates simply describes the sequence of calls made to it by Yasm and the final object and symbol table information in a human\-readable text format (that in a normal object format would get processed into that object format's particular binary representation). This object format is not intended for real use, but rather for debugging Yasm's internals.
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.SH "ELF"
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.PP
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The ELF object format really comes in two flavors:
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\(lqelf32\(rq
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(for 32\-bit targets) and
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\(lqelf64\(rq
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(for 64\-bit targets). ELF is a standard object format in common use on modern Unix and compatible systems (e.g. Linux, FreeBSD). ELF has complex support for relocatable and shared objects.
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.SH "MACHO"
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.PP
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The Mach\-O object format really comes in two flavors:
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\(lqmacho32\(rq
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(for 32\-bit targets) and
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\(lqmacho64\(rq
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(for 64\-bit targets). Mach\-O is used as the object format on MacOS X. As Yasm currently only supports x86 and AMD64 instruction sets, it can only generate Mach\-O objects for Intel\-based Macs.
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.SH "RDF"
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.PP
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The RDOFF2 object format is a simple multi\-section format originally designed for NASM. It supports segment references but not WRT references. It was designed primarily for simplicity and has minimalistic headers for ease of loading and linking. A complete toolchain (linker, librarian, and loader) is distributed with NASM.
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.SH "WIN32"
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.PP
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The Win32 object format produces object files compatible with Microsoft compilers (such as Visual C++) that target the 32\-bit x86 Windows platform. The object format itself is an extended version of COFF.
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.SH "WIN64"
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.PP
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The Win64 object format produces object files compatible with Microsoft compilers that target the 64\-bit
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\(lqx64\(rq
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Windows platform. This format is very similar to the win32 object format, but produces 64\-bit objects.
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.SH "XDF"
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.PP
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The XDF object format is essentially a simplified version of COFF. It's a multi\-section relocatable format that supports 64\-bit physical and virtual addresses.
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.SH "SEE ALSO"
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.PP
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\fByasm\fR(1),
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\fByasm_arch\fR(7)
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.SH "AUTHOR"
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.PP
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\fBPeter\fR \fBJohnson\fR <peter@tortall.net>
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.sp -1n
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.IP "" 3n
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Author.
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.SH "COPYRIGHT"
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Copyright \(co 2006 Peter Johnson
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