FreeCalypso > hg > freecalypso-reveng
view leo-obj/README @ 366:c6a79ac125ac
fluid-mnf: rm Performance, incorporated into README
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 15 Mar 2020 09:00:05 +0000 |
parents | 006d6de4ec6b |
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TI's TCS211 aka Leonardo firmware is a mixture of C sources and linkable object modules (packaged into archive libraries) in the COFF format used by TI's TMS470 compiler toolchain. One of the goals of the FreeCalypso project is to transform this firmware into full C source by analyzing the COFF object blobs with a tool that groks the symbolic information present therein, then replacing each blob either with a matching source piece from another TI firmware leak (e.g., the one in ftp.ifctf.org:/pub/GSM/LoCosto) or with newly written C code that exports the same functions and global variables etc, with logic inside matching the disassembly of the original. The present directory tree holds the just-described project - running 'make' here will first build the tiobjd tool, then run this tool on a bunch of TI's objects, applying some hand-added disassembly hints in many cases. It is noteworthy that there are two kinds of COFF object blobs present in the TCS211 semi-src, with respect to the amount of symbolic information present therein. The objects contained in the binary libraries under g23m/__out__/gsm_<blah>/lib have just the minimal amount of symbolic info needed in order for these objects to be relocatable and linkable, whereas the objects in the GPF libraries under gpf/LIB exhibit much richer "-g"-style symbolic information. Our tiobjd tool makes use of whatever symbolic info is present.