elfdump is a diagnostic tool that gives you information about the contents of an ELF object file.

Using the elfdump Command Line Tool ^TOP^

elfdump reads the input ELF object files that you specify and generates a report of information about the ELF object files.

By default, elfdump output includes a header for each file and information for all sections in each file. But the command line options allow you to change the content and format of the output information.

Listing 8.1  Sample elfdump output

 
ELF FILE NAME: samplelib_startup.o 
FILE CLASS:    32-bit objects 
DATA ENCODING: little endian 
FILE TYPE:     relocatable 
ENTRY POINT:   undefined 
TARGET:        ARM/Thumb Architecture 
EABI VERSION:  2 
ATTRIBUTES:     
 
 
SECTION INFORMATION 
 
        section  offset    size      props    alignment  name                                        
        -------------------------------------------------------------------------------------------- 
        1        00000040  00000008  a + w    0004       runtime_helper_data_area                                       
        2        00000048  00000004  a + w    0004       palm$$_slib_boxl_0_0                                           
        . 
        . 
        . 
 
                _________ 
           ___/ Section 1 \_____________________________________________________________________________ 
         / 
        |   name:      runtime_helper_data_area 
        |   type:      0x1 (progbits) 
        |   flags:     0x00000003 (allocated  + writable) 
        |   address:   0x00000000 
        |   offset:    0x00000040 
        |   size:      0x8 
        |   link:      0x0 
        |   info:      0x0 
        |   alignment: 4 
 
        00000000        00 00 00 00 00 00 00 00                                  . . . . . . . . 
                _________ 
           ___/ Section 2 \_____________________________________________________________________________ 
         / 
        |   name:      palm$$_slib_boxl_0_0 
        |   type:      0x1 (progbits) 
        |   flags:     0x00000003 (allocated  + writable) 
        |   address:   0x00000000 
        |   offset:    0x00000048 
        |   size:      0x4 
        |   link:      0x0 
        |   info:      0x0 
        |   alignment: 4 
 
        00000000        00 00 00 00                                              . . . . 
 

elfdump Reference ^TOP^

This section provides reference information for the elfdump tool.

• elfdump Command Line Interface
• elfdump Options

elfdump Command Line Interface ^TOP^

The general format of the elfdump command line interface is this:

elfdump [options] input_files 

options

elfdump options, as described in the section "elfdump Options."

input_files

A list of ELF object files.

elfdump Options ^TOP^

-help

elfdump prints a summary of help.

-o outputfile

Sets the name of the output file to the name specified by outputfile.

If you do not specify an output filename, elfdump sends the output information to stdout (usually dumping the information to the screen).

-V

elfdump writes the its version numbers to stderr, and exits without performing any further actions.

-v level

Sets the elfdump verbosity level:

0

elfdump displays errors only. This is the default verbosity level.

1

elfdump displays warnings and errors.

2

elfdump displays all messages.

-nodis

elfdump disassembles executable bytecode sections, showing them as hex data dumps.

-nodwarfdis

elfdump does not decode debug data.

-sortsyms

elfdump sorts the output symbol table by value.

-disdata

elfdump disassembles data sections as code including labels.

-allsyms

elfdump shows all (possibly superfluous) symbols in the disassembly.

-arch vers

elfdump disassemble for the given instruction set architecture.

vers

An instruction set architecture value.

Valid values: v3, v3M, v4, v4xM, v4T, v4TxM, v5, v5xM, v5T, v5TxM, v5TexP, v5TE

The default value is v5TE.

-summary

elfdump includes only segment and section summaries.