how to transform elf binary in linux x86_64 to llvm IR about mcsema HOT 4 CLOSED

Hi,

That command just builds the binary file. Look deeper into the demo examples (e.g.: https://github.com/trailofbits/mcsema/blob/master/mc-sema/tests/x86_64/demo1.sh):

${BIN_DESCEND_PATH}/bin_descend -march=x86-64 -d -entry-symbol=start -i=demo_test1.o: will recover the CFG from demo_test1.o and save it into demo_test1.cfg

${CFG_TO_BC_PATH}/cfg_to_bc -mtriple=x86_64-pc-linux-gnu -i demo_test1.cfg -driver=demo1_entry,start,raw,return,C -o demo_test1.bc will take the CFG, demo_test1.cfg, and output a LLVM bitcode into demo_test1.bc.

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I have read the content of demo1.sh.
At first, it compiles assembly file to object file with nasm, and then use bin_descend and cfg_to_bc to get the llvm IR bitcode file.
So the original source of demos is object file, not executable file.
As is known to all , object file and executable file are different. What I have now is binary file , not object file.
Besides,why did the author put assembly file in the demo , other than object file ? Maybe for cross-platform.

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The example in https://github.com/trailofbits/mcsema/blob/master/mc-sema/tests/linked_elf_test.sh shows how to lift a fully linked ELF executable.

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Thank you!

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