NAME

       yasm_objfmts - Yasm Supported Object Formats

SYNOPSIS

       yasm -f objfmt ...

DESCRIPTION

       The standard Yasm distribution includes a number of modules for different object formats (Yasm's primary
       output).

       The object format is selected on the yasm(1) command line by use of the -f objfmt command line option.

BIN

       The “bin” 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.

COFF

       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.

DBG

       The “dbg” object format is not a “real” 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.

ELF

       The ELF object format really comes in three flavors: “elf32” (for 32-bit targets), “elf64” (for 64-bit
       targets and “elfx32” (for x32 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.

MACHO

       The Mach-O object format really comes in two flavors: “macho32” (for 32-bit targets) and “macho64” (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.

RDF

       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.

WIN32

       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.

WIN64

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

XDF

       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.

SEE ALSO

       yasm(1), yasm_arch(7)

AUTHOR

       Peter Johnson <peter@tortall.net>
           Author.

COPYRIGHT

       Copyright © 2006 Peter Johnson