| .\" Title: yasm_objfmts |
| .\" Author: Peter Johnson <peter@tortall.net> |
| .\" Generator: DocBook XSL Stylesheets v1.70.1 <http://docbook.sf.net/> |
| .\" Date: February 2007 |
| .\" Manual: Yasm Supported Object Formats |
| .\" Source: Yasm |
| .\" |
| .TH "YASM_OBJFMTS" "7" "February 2007" "Yasm" "Yasm Supported Object Formats" |
| .\" disable hyphenation |
| .nh |
| .\" disable justification (adjust text to left margin only) |
| .ad l |
| .SH "NAME" |
| yasm_objfmts \- Yasm Supported Object Formats |
| .SH "SYNOPSIS" |
| .HP 5 |
| \fByasm\fR \fB\-f\ \fR\fB\fIobjfmt\fR\fR \fB\fI...\fR\fR |
| .SH "DESCRIPTION" |
| .PP |
| The standard Yasm distribution includes a number of modules for different object formats (Yasm's primary output). |
| .PP |
| The object format is selected on the |
| \fByasm\fR(1) |
| command line by use of the |
| \fB\-f \fR\fB\fIobjfmt\fR\fR |
| command line option. |
| .SH "BIN" |
| .PP |
| The |
| \(lqbin\(rq |
| 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. |
| .SH "COFF" |
| .PP |
| 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. |
| .SH "DBG" |
| .PP |
| The |
| \(lqdbg\(rq |
| object format is not a |
| \(lqreal\(rq |
| 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. |
| .SH "ELF" |
| .PP |
| The ELF object format really comes in two flavors: |
| \(lqelf32\(rq |
| (for 32\-bit targets) and |
| \(lqelf64\(rq |
| (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. |
| .SH "MACHO" |
| .PP |
| The Mach\-O object format really comes in two flavors: |
| \(lqmacho32\(rq |
| (for 32\-bit targets) and |
| \(lqmacho64\(rq |
| (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. |
| .SH "RDF" |
| .PP |
| 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. |
| .SH "WIN32" |
| .PP |
| 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. |
| .SH "WIN64" |
| .PP |
| The Win64 object format produces object files compatible with Microsoft compilers that target the 64\-bit |
| \(lqx64\(rq |
| Windows platform. This format is very similar to the win32 object format, but produces 64\-bit objects. |
| .SH "XDF" |
| .PP |
| 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. |
| .SH "SEE ALSO" |
| .PP |
| \fByasm\fR(1), |
| \fByasm_arch\fR(7) |
| .SH "AUTHOR" |
| .PP |
| \fBPeter\fR \fBJohnson\fR <peter@tortall.net> |
| .sp -1n |
| .IP "" 3n |
| Author. |
| .SH "COPYRIGHT" |
| Copyright \(co 2006 Peter Johnson |