Disassembling Object Files with dis

Disassembling Object Files with dis

The dis tool disassembles object files into machine instructions. You can disassemble an object, archive library, or executable file.

dis Syntax

The syntax for dis is:

dis options filename1 [filename2...filenamen]

options One or more of the options listed in Table 2-5.

filename: Specifies the name of one or more files to disassemble.

dis Options

Table 2-5 lists dis options. For more information, see the dis(1) reference page. Click dis to view the page.

dis Options
Option Description
-b begin_addr Starts disassembly at begin_address. You can specify the address as decimal, octal (with a leading 0), or hexadecimal (with a leading 0x).
-d section Disassembles the named section as data, and prints the offset of the data from the beginning of the section.
-D section Disassembles the named section as data, and prints the address of the data.
-e end_address Stops disassembly at end_address. You can specify the address as decimal, octal (with a leading 0), or hexadecimal (with a leading 0x).
-F function Disassembles the named function in each object file you specify on the command line.
-h Substitutes the hardware register names for the software register names in the output.
-H Removes the leading source line, and leaves the hex value and the instructions.
-i Removes the leading source line and hexadecimal value of disassembly, and leaves only the instructions.
-I directory Uses directory to help locate source code.
-l string Disassembles the archive file specified by string.
-L Looks up source labels for subsequent printing.
-o Prints numbers in octal. The default is hexadecimal.
-s Performs symbolic disassembly where possible. Prints (using C syntax) symbol names on the line following the instruction. Displays source code mixed with assembly code
-t section Disassembles the named section as text.
-T Specifies the trace flag for debugging the disassembler.
-V Prints (on stderr) the version number of the disassembler being executed.
-w Prints source code to the right of assembly code (produces wide output). Use this option with the -s option.
-x Prints offsets in hexadecimal (the default).

*dis* Options
Option	Description
-b begin_addr	Starts disassembly at begin_address. You can specify the address as decimal, octal (with a leading 0), or hexadecimal (with a leading 0x).
-d section	Disassembles the named section as data, and prints the offset of the data from the beginning of the section.
-D section	Disassembles the named section as data, and prints the address of the data.
-e end_address	Stops disassembly at end_address. You can specify the address as decimal, octal (with a leading 0), or hexadecimal (with a leading 0x).
-F function	Disassembles the named function in each object file you specify on the command line.
-h	Substitutes the hardware register names for the software register names in the output.
-H	Removes the leading source line, and leaves the hex value and the instructions.
-i	Removes the leading source line and hexadecimal value of disassembly, and leaves only the instructions.
-I directory	Uses directory to help locate source code.
-l string	Disassembles the archive file specified by string.
-L	Looks up source labels for subsequent printing.
-o	Prints numbers in octal. The default is hexadecimal.
-s	Performs symbolic disassembly where possible. Prints (using C syntax) symbol names on the line following the instruction. Displays source code mixed with assembly code
-t section	Disassembles the named section as text.
-T	Specifies the trace flag for debugging the disassembler.
-V	Prints (on stderr) the version number of the disassembler being executed.
-w	Prints source code to the right of assembly code (produces wide output). Use this option with the -s option.
-x	Prints offsets in hexadecimal (the default).