What does readelf command do?

readelf displays information about one or more ELF format object files. The options control what particular information to display. elffile… are the object files to be examined. 32-bit and 64-bit ELF files are supported, as are archives containing ELF files.

What is Linux readelf command?

readelf displays information about one or more ELF format object files. This program performs a similar function to objdump but it goes into more detail and it exists independently of the BFD library, so if there is a bug in BFD then readelf will not be affected.

How do I open an elf file?

Right-click on the file, select “Open With…”, and then select Executable and Linkable Format File, Tasklink for Windows Machine Control Executable and Linking Format, or Playstation Executable/Game Data File. That will create an association between the ELF file extension and your chosen software.

How do you use nm command?


  1. To list the static and external symbols of the object file a.out , enter: nm -e a.out.
  2. To display symbol sizes and values as hexadecimal and sort the symbols by value, enter: nm -xv a.out.
  3. To display symbol of all 64-bit objects in libc.a, ignoring all 32-bit objects: nm -X64 /usr/lib/libc.a.

What is readelf in C?

exists as an independent program to help verify the correct working of BFD. There is also the case that readelf can provide more information about an. ELF file than is provided by objdump. In particular it can display DWARF. debugging information which (at the moment) objdump cannot.

What is entry point address?

In computer programming, an entry point is a point in a program where the execution of a program begins, and where the program has access to command line arguments. In other cases, the entry point is at some other known memory address which can be an absolute address or relative address (offset).

What elf file contains?

An elf file contains the bin information but it is surrounded by lots of other information, possible debug info, symbols, can distinguish code from data within the binary.

What is GNU nm?

nm (name mangling) is a Unix command used to dump the symbol table and their attributes from a binary executable file (including libraries, compiled object modules, shared-object files, and standalone executables). The GNU Project ships an implementation of nm as part of the GNU Binutils package.

What is the symbol for nanometer?

As part of the International System of Units (SI), the standard symbol for nanometre is nm.

How do I run a shell script in gdb?

There are two options that you can do:

  1. Invoke GDB directly within the shell script.
  2. Run the shell script and then attach the debugger to the already running C++ process like so: gdb progname 1234 where 1234 is the process ID of the running C++ process.