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plt align=16 execute section number 11, code It might not be, though, since disassembly of stuff like (from /lib/x86_64-linux-gnu/libc.so.6) (So you aren't limited to keeping things the same size.) With no changes, the result should be near-identical. Note that this output is ready to be assembled back into an object file, so you can tweak the code at the asm source level, rather than with a hex-editor on the machine code. It can disassemble into NASM, YASM, MASM, or GNU (AT&T) syntax. It's open source, and easy to compile for Linux. It also indicates NOPs more clearly than other disassemblers (making it clear when there's padding, rather than disassembling it as just another instruction.) Other disassemblers usually disassemble jump instructions with just a numeric destination, and don't put any marker at a branch target to help you find the top of loops and so on. (It doesn't recognize - as shorthand for stdout, and defaults to outputting to a file of similar name to the input file, with. It will add comments to the disassembly output for performance problems (like the dreaded LCP stall from instructions with 16bit immediate constants, for example).
#LINUX DISASSEMBLER PORTABLE#
Portable tools that can disassemble AArch64, MIPS, or whatever machine code include objdump and llvm-objdump.Īgner Fog's disassembler, objconv, is quite nice.
#LINUX DISASSEMBLER FULL#
With full debugging info it's even better. a.out.(no debugging symbols found).done.ĭump of assembler code for function main: You don't have to run the binary or have debuginfo. Feel free to turn auto-sync off and go back to doing it manually if necessary.An interesting alternative to objdump is gdb. Also, if spurious jumps or calls result from disassembling non-machine-code data, sync markers may get placed in strange places. If you want to disassemble an object file, you should probably be using objdump(1).Īuto-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. Ndisasm only disassembles binary files: it has no understanding of the header information present in object or executable files. Specifies 32-bit mode, more compactly than using '-b 32'. Will attempt to guess where synchronisation should be performed, by means of examining the target addresses of the relative jumps and calls it disassembles. The skipped bytes still count towards the calculation of the disassembly offset.Įnables automatic (or intelligent) sync mode, in which Offset, should be skipped over without generating any output. Instruction will be shown starting at the given load address. This does not count towards the calculation of the disassembly offset: the first Specifies a number of bytes to discard from the beginning of the file before starting disassembly. Hence the instruction which starts at that address will be correctly disassembled. Will not output any machine instruction which encompasses bytes on both sides of the address. Manually specifies a synchronisation address, such that To get the addresses it lists down the left hand margin, and the target addresses of PC-relative jumps and calls, right.
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Specifies the notional load address for the file. To exit immediately, after displaying its version number. To exit immediately, after giving a summary of its invocation options.