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What is objdump in GCC?
According to its manpage, objdump is used to dsplay information from object files. It has a whole host of different switches that you can supply to interrogate object files, but we’ll only have a very simple usage for it in this post. I prefer Intel assembly syntax, so I’ll specify -M intel .
What’s the difference between objdump and readelf?
readelf and objdump objdump has a similar function but with different features like disassembling. The main difference is that readelf does not depend on BFD and helps to check if BFD works.
What does objdump do?
objdump is a command-line program for displaying various information about object files on Unix-like operating systems. For instance, it can be used as a disassembler to view an executable in assembly form. objdump uses the BFD library to read the contents of object files.
What is readelf in Linux?
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 debug with Objdump?
At address 0x10010000 in start() in other words the first line of the program.
- So see the objdump and set the breakpoints at appropriate addresses.
- Press C to Continue.
- PC: 0x10010010 in START, in other words the next instruction that compile executes.
What is BFD format?
BFD is a package which allows applications to use the same routines to operate on object files whatever the object file format. A new object file format can be supported simply by creating a new BFD back end and adding it to the library. The back ends provide BFD its view of the real world.
What does a disassembler do?
A disassembler is a computer program that translates machine language into assembly language—the inverse operation to that of an assembler. A disassembler differs from a decompiler, which targets a high-level language rather than an assembly language.
What is the tool used to read the ELF files?
Tools. readelf is a Unix binary utility that displays information about one or more ELF files. A GNU General Public License implementation is provided by GNU Binutils. elfdump is a command for viewing ELF information in an elf file, available under Solaris and FreeBSD.
Does GDB use Objdump?
Using objdump to examine binary files. In addition to GDB, you can also use the program objdump to display a range of information about a binary file.