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YASM_OBJFMTS

Section: Yasm Supported Object Formats (7)
Updated: February 2007
Index Return to Main Contents
 

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 lqbinrq 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 lqdbgrq object format is not a lqrealrq 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 two flavors: lqelf32rq (for 32-bit targets) and lqelf64rq (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.  

MACHO

The Mach-O object format really comes in two flavors: lqmacho32rq (for 32-bit targets) and lqmacho64rq (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 lqx64rq 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


 

Index

NAME
SYNOPSIS
DESCRIPTION
BIN
COFF
DBG
ELF
MACHO
RDF
WIN32
WIN64
XDF
SEE ALSO
AUTHOR
COPYRIGHT


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