This tool allows for individual functions within a C file to be replaced by assembly code, heavily inspired by asm-processor.
The MWCC compiler does support including raw assembly within a C file, however all variables and functions must be defined, this makes the traditional Ship of Theseus approach to matching decomp rather slow and painful.
Where asm-processor uses an GLOBAL_ASM pragma, mwccgap uses INCLUDE_ASM macro as the first project to use mwccgap uses gcc. In future support might be added to suppport either approach.
Functions that are INCLUDE_ASM'd within the C file are expanded to nops of the appropriate size and the C file is compiled. These functions are then assembled separately, and the resulting object data is transplanted into the C object. Symbols and relocations are updated as necessary.
mwccgap input.c output.o [ -O4,p -sym on ... ]
mwccgap supports the following arguments:
The path to the MWCC executable, defaults to mwccpsp.exe
The path to GNU as, defaults to mipsel-linux-gnu-as
Whether or not to prefix the call to the MWCC executable with wibo, defaults to false.
Path to wibo (i.e. if wibo is not on your path, or you wish to use wine instead), defaults to wibo.
Optional prefix for INCLUDE_ASM files.
All additional arguments will be passed to the MWCC executable.
The limitations currently outnumber the features, PRs are very welcome to improve the tool.
This project is in it's infancy and is full of assumptions, and therefore likely riddled with bugs; again PRs are welcome!
Projects that use mwccgap include: