Using current ELF in Ghidra instead of file on disk?

[Manouchehri]

Right now, ghidra2dwarf.py relies on having the original ELF on disk. It ends up breaking one of my automated workflows, since my tooling cleans up samples off disk after they've been imported to Ghidra.

ghidra2dwarf/src/ghidra2dwarf.py

Lines 69 to 73 in 650597d

	while not os.path.isfile(exe_path):
	print "I couldn't find the original file at path %s. Please specify its path:" % exe_path
	exe_path = askFile("Original binary path", "Open").path
	curr.executablePath = exe_path
	print "Changed binary path to %s." % exe_path

ghidra2dwarf/src/ghidra2dwarf.py

Line 515 in 650597d

add_sections_to_elf(exe_path, out_path, sections)

We should use the ElfExporter class instead to get the original ELF file. https://github.com/NationalSecurityAgency/ghidra/blob/master/Ghidra/Features/Base/src/main/java/ghidra/app/util/exporter/ElfExporter.java

Here's some examples of how to do that:

https://github.com/sengi12/GhidraScripting-Basics/blob/fa6181bf0634a12015296fed54068bff0585acc5/examples/exportLocalCopy.py#L22-L27

https://github.com/riverratz/ghidraheadless_binexport/blob/b69966cc6ece8820588355c5f5b893b6d0d1c613/sample_functions_cpy.py#L17-L32

[Manouchehri]

I'll do this myself, just wanted to make a ticket so I don't forget.