csmith | ||
curiosities | ||
DwarfSynth | ||
libdwarfw@322e118261 | ||
test | ||
.gitignore | ||
.gitmodules | ||
.merlin | ||
_tags | ||
dwarfsynth.ml | ||
DwarfSynth.mlpack | ||
LICENSE | ||
Makefile | ||
README.md | ||
synthesize_dwarf.sh |
dwarf-synthesis
A tool for automatic synthesis of DWARF.
The purpose of this tool is to take any given binary program or library,
examine its assembly code and, based solely on that, generate the corresponding
.eh_frame
DWARF data.
Dependencies
This tool relies on
- BAP version 1.6 as of today, which is available through OPAM;
objcopy
, often packaged asbinutils
libelf
libdwarf
libdwarfw
, packaged as submodule
Installing dependencies
You should be able to easily install objcopy
(binutils
), libelf
,
libdwarf
and opam
via your package manager. Once
opam
is set up, you should be able
to simply opam install bap
. We recommand that you use a fresh opam switch
in case you already have installed packages with opam
.
Compiling
Simply run make
to compile all the necessary tools, including compiling and
installing the BAP plugin dwarfsynth
.
Running with a wrapper script
To generate an .eh_frame
section for some binary foo.bin
and write the
output as foo.eh.bin
, you can run
./synthesize_dwarf foo.bin foo.eh.bin
You can also omit the second parameter to simply overwrite foo.bin
.
Running by hand
If you want, for some reason, to run by hand the multiple components, you can
follow this procedure (by using more appropriate file names, and, possibly, a
temporary directory -- see mktemp -d
).
Running the BAP plugin
bap prog_to_analyze.bin -p dwarfsynth --dwarfsynth-output tmp.marshal
Running ml_dwarf_write
You can get a help text with ./ml_dwarf_write.bin
. Otherwise, you can run
./ml_dwarf_write.bin tmp.marshal prog_to_analyze.bin eh_frame_section`
Stitching the section into a binary
objcopy --add-section .eh_frame=eh_frame_section prog_to_analyze.bin prog_to_analyze.eh.bin
Commonly used commands
List a binary sections
objdump -h blah.bin
Strip a binary of its eh_frame
objcopy --remove-section '.eh_frame' --remove-section '.eh_frame_hdr' blah.bin