1YASM_OBJFMTS(7)          Yasm Supported Object Formats         YASM_OBJFMTS(7)
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NAME

6       yasm_objfmts - Yasm Supported Object Formats
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SYNOPSIS

9       yasm -f objfmt ...
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DESCRIPTION

12       The standard Yasm distribution includes a number of modules for
13       different object formats (Yasm's primary output).
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15       The object format is selected on the yasm(1) command line by use of the
16       -f objfmt command line option.
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BIN

19       The “bin” object format produces a flat-format, non-relocatable binary
20       file. It is appropriate for producing DOS .COM executables or things
21       like boot blocks. It supports only 3 sections and those sections are
22       written in a predefined order to the output file.
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COFF

25       The COFF object format is an older relocatable object format used on
26       older Unix and compatible systems, and also (more recently) on the
27       DJGPP development system for DOS.
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DBG

30       The “dbg” object format is not a “real” object format; the output file
31       it creates simply describes the sequence of calls made to it by Yasm
32       and the final object and symbol table information in a human-readable
33       text format (that in a normal object format would get processed into
34       that object format's particular binary representation). This object
35       format is not intended for real use, but rather for debugging Yasm's
36       internals.
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ELF

39       The ELF object format really comes in three flavors: “elf32” (for
40       32-bit targets), “elf64” (for 64-bit targets and “elfx32” (for x32
41       targets). ELF is a standard object format in common use on modern Unix
42       and compatible systems (e.g. Linux, FreeBSD). ELF has complex support
43       for relocatable and shared objects.
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MACHO

46       The Mach-O object format really comes in two flavors: “macho32” (for
47       32-bit targets) and “macho64” (for 64-bit targets). Mach-O is used as
48       the object format on MacOS X. As Yasm currently only supports x86 and
49       AMD64 instruction sets, it can only generate Mach-O objects for
50       Intel-based Macs.
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RDF

53       The RDOFF2 object format is a simple multi-section format originally
54       designed for NASM. It supports segment references but not WRT
55       references. It was designed primarily for simplicity and has
56       minimalistic headers for ease of loading and linking. A complete
57       toolchain (linker, librarian, and loader) is distributed with NASM.
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WIN32

60       The Win32 object format produces object files compatible with Microsoft
61       compilers (such as Visual C++) that target the 32-bit x86 Windows
62       platform. The object format itself is an extended version of COFF.
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WIN64

65       The Win64 object format produces object files compatible with Microsoft
66       compilers that target the 64-bit “x64” Windows platform. This format is
67       very similar to the win32 object format, but produces 64-bit objects.
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XDF

70       The XDF object format is essentially a simplified version of COFF. It's
71       a multi-section relocatable format that supports 64-bit physical and
72       virtual addresses.
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SEE ALSO

75       yasm(1), yasm_arch(7)
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AUTHOR

78       Peter Johnson <peter@tortall.net>
79           Author.
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82       Copyright © 2006 Peter Johnson
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86Yasm                             February 2007                 YASM_OBJFMTS(7)
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