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asm-parser

Categorises and filters assembly in a way that's understood by Compiler Explorer.

Possible filters as command line parameters:

  • -binary changes to the Binary mode filtering that's based on the assembly output from GNU Objdump
  • -unused_labels try to filter out functions that aren't strongly used
  • -directives filter out .directives
  • -comment_only filter out comments
  • -whitespace
  • -library_functions try to filter out functions that belong in other libraries that are used (filtering is based on filepaths)
  • -dont_mask_filenames always output the filename if available

Other parameters:

  • -plt Also leaves out labels that End with @plt (without this, only labels that Start with .plt are left out)
  • -nocompat Leaves some experimental extra information
  • -stdin Reads assembly from STDIN instead of from a given file
  • -outputtext Instead of writing to JSON, output the filtered assemblys

Example usage

Feeding an objdump via stdin into asm-parser:

objdump --d a.out -l --insn-width=16 | asm-parser -stdin -binary

Building locally

You'll need:

Then you can

$ mkdir build
$ cd build
$ cmake .. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_COMPILER=<path/to/compiler/if/needed>
$ make -j$(nproc)
$ make test

(see https://github.com/compiler-explorer/asm-parser/blob/main/build.sh for an example, you might need to configure PATH first before doing so)