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95 lines
2.9 KiB
Plaintext
95 lines
2.9 KiB
Plaintext
ndisasm(1)
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==========
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:doctype: manpage
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:man source: NASM
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:man manual: The Netwide Assembler Project
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NAME
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----
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ndisasm - the Netwide Disassembler, an 80x86 binary file disassembler
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SYNOPSIS
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--------
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*ndisasm* [ *-o* origin ] [ *-s* sync-point [...]] [ *-a* | *-i* ]
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[ *-b* bits ] [ *-u* ] [ *-e* hdrlen ] [ *-p* vendor ]
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[ *-k* offset,length [...]] infile
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DESCRIPTION
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-----------
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The *ndisasm* command generates a disassembly listing of the binary file
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infile and directs it to stdout.
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OPTIONS
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-------
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*-h*::
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Causes *ndisasm* to exit immediately, after giving a summary
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of its invocation options.
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*-r*|*-v*::
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Causes *ndisasm* to exit immediately, after displaying its
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version number.
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*-o* 'origin'::
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Specifies the notional load address for the file. This
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option causes *ndisasm* to get the addresses it lists
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down the left hand margin, and the target addresses
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of PC-relative jumps and calls, right.
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*-s* 'sync-point'::
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Manually specifies a synchronisation address, such that
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*ndisasm* will not output any machine instruction which
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encompasses bytes on both sides of the address. Hence
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the instruction which starts at that address will be
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correctly disassembled.
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*-e* 'hdrlen'::
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Specifies a number of bytes to discard from the beginning
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of the file before starting disassembly. This does not
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count towards the calculation of the disassembly offset:
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the first 'disassembled' instruction will be shown starting
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at the given load address.
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*-k* 'offset,length'::
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Specifies that 'length' bytes, starting from disassembly
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offset 'offset', should be skipped over without generating
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any output. The skipped bytes still count towards the
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calculation of the disassembly offset.
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*-a*|*-i*::
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Enables automatic (or intelligent) sync mode, in which
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*ndisasm* will attempt to guess where synchronisation should
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be performed, by means of examining the target addresses
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of the relative jumps and calls it disassembles.
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*-b* 'bits'::
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Specifies 16-, 32- or 64-bit mode. The default is 16-bit
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mode.
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*-u*::
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Specifies 32-bit mode, more compactly than using `-b 32'.
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*-p* 'vendor'::
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Prefers instructions as defined by 'vendor' in case of
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a conflict. Known 'vendor' names include *intel*, *amd*,
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*cyrix*, and *idt*. The default is *intel*.
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RESTRICTIONS
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------------
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*ndisasm* only disassembles binary files: it has no understanding of
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the header information present in object or executable files.
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If you want to disassemble an object file, you should probably
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be using *objdump*(1).
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Auto-sync mode won't necessarily cure all your synchronisation
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problems: a sync marker can only be placed automatically if a
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jump or call instruction is found to refer to it 'before'
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*ndisasm* actually disassembles that part of the code. Also,
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if spurious jumps or calls result from disassembling
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non-machine-code data, sync markers may get placed in strange
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places. Feel free to turn auto-sync off and go back to doing
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it manually if necessary.
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SEE ALSO
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--------
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*objdump*(1)
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