Gnu tool objdump

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Linked 2. As you see there are total of 26 only partial output is shown here. So we see that the information related to all the section headers was printed in the output. Consider the following example. The assembler contents of executable sections in the object file are displayed in this output partial output shown below :.

In case the assembler contents of all the sections is required in output, the option -D can be used. So we see that the relevant output was displayed. Since the output was very long, so I clipped it. Note that I used the pager command for controlling the output. Dynamic symbols are those which are resolved during run time. The information related to these symbols can be retrieved using the -D option. Debug using GDB. To debug a MicroBlaze executable, your source files must have been compiled with the "-g -mgas" options.

When the GDB prompt appears, enter the following commands, where "a. You can now provide standard GDB commands to test your program. The "objdump" utility lets you see the contents of an object. To see a listing of the assembly code in your object or executable file, use "mb-objdump -d a. Skip to Navigation Skip to Main Content. Toggle SideBar. Xilinx Support Community. One neat thing you can do with objcopy is convert any binary blob into an object file that can then be linked in your image.

This can be useful for getting a quick summary of what the binary footprint looks like:. No discussion of binary inspection is complete without a shout out to Compiler Explorer. This is an online tool that allows you to compile snippets of code against a ridiculous amount of different compilers. Even better you can create short urls and share links with friends. For example, here is an interesting one I was looking at recently.

For ARMv7-M, 4 byte loads and store instructions ldr and str , respectively support unaligned access. When compiling code for space optimizations using -Os CFLAG , I would have expected unaligned accesses to get optimized using this instruction. What I noticed is for some reason if the unaligned store is through a packed structure, the optimization does not take place.

If you are looking to perform your own analysis on ELF files, I highly recommend checking out the repo. There is an examples folder in the project that you can use as inspiration to get started. As a quick example, we can implement an equivalent of the size binutil command in about 30 lines of Python! This can be an interesting tool to run on ELFs if you are linking libraries compiled with multiple compilers or maintaining a third party binary SDK and want to catch regressions.

I assume you can ompile it yourself on OSX, but I typically just run it in an ubuntu docker image and install via apt-get :. The LLVM project has clones of most of the binutil commands we discussed above as well as a bunch of tools of its own.

Are there are tools or commands you find useful that we did not mention? Let us know in the discussion area below! See anything you'd like to change? Submit a pull request or open an issue at GitHub. This program is free software; you may redistribute it under the terms of the GNU General Public License version 3 or at your option any later version.

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