Worked on enhancing ARM M-profile support in the NationalSecurityAgency/ghidra repository by addressing a critical bug affecting interrupt handling. Focused on low-level programming in C, the developer corrected the ISR_NUMBER mask in the mrsipsr instruction, updating it from 0x1f to 0x1ff to align with ARM architecture specifications. This patch improved the accuracy of exception number analysis, reducing the risk of misinterpreted interrupts in embedded systems workflows. By refining how the disassembler and debugger interpret ARM M-profile instructions, the work contributed to more reliable analysis and debugging for ARM targets, demonstrating attention to architectural detail and embedded systems expertise.