- Reverse, Document, and Disassemble code into .s files, and data into binary formats.
- Include the .s file into
_link.s - If the file is to be included to a specified section (continuing from the last end address), or a new range:
- If it belongs to a new range, create a section for that range according to the format
.r__firstFile. (Ex: the first range is.r__startsince start.s is the first file in that section.) - Set the section flag to "ax" to ensure it's loaded. (Eg:
.section .r__start, "ax") - include the range, and its start address into
ld_script.x - Set the section of the file:
.section .filename, "ax"
- there may be external symbols declared within. Those are symbols that are used, but not declared anywhere in the file. For that, create a filename.inc file inside the externs directory to specify all external symbols for each file.
- .equ define each symbol as such:
.equ symbolname, symbol_val - Include the external inc file to the start of
_link.s.
- If using IDA, https://github.com/LanHikari22/GBA-IDA-Pseudo-Terminal contains tools that speed up this process by generating the disassembly and external symbols automatically.
- make rom; Build the rom and make sure it's successful
- make checksum; Make sure that the output ROM has an identical checksum to the input binary.
- if (!complete) goto 1; // good luck!