Altera Nios II for Ghidra

This repo contains an implementation of the Altera Nios II soft-processor for Ghidra.

Installation

• Copy the extension ZIP file to your local Ghidra/extensions/Ghidra
• Start Ghidra
• File -> Install Extension
• Select Nios2Processor
• Restart Ghidra

Build

git clone [this repo]
cd ghidra_processor_nios_ii
export GHIDRA_INSTALL_DIR=[your local Ghidra install]
gradle buildExtension

• The build artifact will be dropped into the ./dist folder.

Resources used

• Nios II Processor Reference Guide
• Implementing a New CPU Architecture for Ghidra
• Specifying Representations of Machine Instructions

The documentation for ldefs, cspec and pspec files is kind of hidden. Inside the Ghidra repository, it is located at REPO/Ghidra/Features/Decompiler/src/main/doc and can be compiled to html with the following command:
xsltproc cspec_html.xsl cspec.xml > cspec.html

Changelog

Original source: https://gitlab.com/CycleOfTheAbsurd/ghidra_processor_nios_II

• Added fixes for current Ghidra.
• Added build.gradle
• Fixed call offsets
• Added mov and nop pseudo-ops
• Updated calling convention