EnglishFrenchSpanish

OnWorks favicon

ndisasm - Online in the Cloud

Run ndisasm in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command ndisasm that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


ndisasm - the Netwide Disassembler, an 80x86 binary file disassembler

SYNOPSIS


ndisasm [ -o origin ] [ -s sync-point [...]] [ -a | -i ] [ -b bits ] [ -u ] [ -e hdrlen ]
[ -p vendor ] [ -k offset,length [...]] infile

DESCRIPTION


The ndisasm command generates a disassembly listing of the binary file infile and directs
it to stdout.

OPTIONS


-h
Causes ndisasm to exit immediately, after giving a summary of its invocation options.

-r|-v
Causes ndisasm to exit immediately, after displaying its version number.

-o origin
Specifies the notional load address for the file. This option causes ndisasm to get
the addresses it lists down the left hand margin, and the target addresses of
PC-relative jumps and calls, right.

-s sync-point
Manually specifies a synchronisation address, such that ndisasm will not output any
machine instruction which encompasses bytes on both sides of the address. Hence the
instruction which starts at that address will be correctly disassembled.

-e hdrlen
Specifies a number of bytes to discard from the beginning of the file before starting
disassembly. This does not count towards the calculation of the disassembly offset:
the first disassembled instruction will be shown starting at the given load address.

-k offset,length
Specifies that length bytes, starting from disassembly offset offset, should be
skipped over without generating any output. The skipped bytes still count towards the
calculation of the disassembly offset.

-a|-i
Enables automatic (or intelligent) sync mode, in which ndisasm will attempt to guess
where synchronisation should be performed, by means of examining the target addresses
of the relative jumps and calls it disassembles.

-b bits
Specifies 16-, 32- or 64-bit mode. The default is 16-bit mode.

-u
Specifies 32-bit mode, more compactly than using ‘-b 32’.

-p vendor
Prefers instructions as defined by vendor in case of a conflict. Known vendor names
include intel, amd, cyrix, and idt. The default is intel.

RESTRICTIONS


ndisasm only disassembles binary files: it has no understanding of the header information
present in object or executable files. If you want to disassemble an object file, you
should probably be using objdump(1).

Auto-sync mode won’t necessarily cure all your synchronisation problems: a sync marker can
only be placed automatically if a jump or call instruction is found to refer to it before
ndisasm actually disassembles that part of the code. Also, if spurious jumps or calls
result from disassembling non-machine-code data, sync markers may get placed in strange
places. Feel free to turn auto-sync off and go back to doing it manually if necessary.

Use ndisasm online using onworks.net services


Free Servers & Workstations

Download Windows & Linux apps

  • 1
    Image Downloader
    Image Downloader
    Crawl and download images using
    Selenium Using python3 and PyQt5.
    Supported Search Engine: Google, Bing,
    Baidu. Keywords input from the keyboard
    or input from ...
    Download Image Downloader
  • 2
    Eclipse Tomcat Plugin
    Eclipse Tomcat Plugin
    The Eclipse Tomcat Plugin provides
    simple integration of a tomcat servlet
    container for the development of java
    web applications. You can join us for
    discussio...
    Download Eclipse Tomcat Plugin
  • 3
    WebTorrent Desktop
    WebTorrent Desktop
    WebTorrent Desktop is for streaming
    torrents on Mac, Windows or Linux. It
    connects to both BitTorrent and
    WebTorrent peers. Now there's no
    need to wait for...
    Download WebTorrent Desktop
  • 4
    GenX
    GenX
    GenX is a scientific program to refine
    x-ray refelcetivity, neutron
    reflectivity and surface x-ray
    diffraction data using the differential
    evolution algorithm....
    Download GenX
  • 5
    pspp4windows
    pspp4windows
    PSPP is a program for statistical
    analysis of sampled data. It is a free
    replacement for the proprietary program
    SPSS. PSPP has both text-based and
    graphical us...
    Download pspp4windows
  • 6
    Git Extensions
    Git Extensions
    Git Extensions is a standalone UI tool
    for managing Git repositories. It also
    integrates with Windows Explorer and
    Microsoft Visual Studio
    (2015/2017/2019). Th...
    Download Git Extensions
  • More »

Linux commands

Ad