https://github.com/gdelugre/ida-arm-system-highlight

IDA script for highlighting and decoding ARM system instructions
https://github.com/gdelugre/ida-arm-system-highlight

arm ida-pro python script

Last synced: 30 days ago
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IDA script for highlighting and decoding ARM system instructions

• Host: GitHub
• URL: https://github.com/gdelugre/ida-arm-system-highlight
• Owner: gdelugre
• License: mit
• Created: 2017-05-09T15:52:07.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2021-09-28T12:26:41.000Z (over 3 years ago)
• Last Synced: 2025-03-30T01:09:16.874Z (about 1 month ago)
• Topics: arm, ida-pro, python, script
• Language: Python
• Size: 389 KB
• Stars: 393
• Watchers: 26
• Forks: 55
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
## Decoding ARM system instructions

This script will give you the list of ARM system instructions used in your IDA

database. This is useful for locating specific low-level pieces of code

(setting up the MMU, caches, fault handlers, etc.).

One hassle of reverse engineering low-level ARM code is that IDA Pro does not

decode the internal registers accessed by co-processor instructions

(``MCR``/``MRC`` and ``MSR``/``MRS`` on AArch64).

After applying the script, the system registers accessed will be automatically

commented in the database, as defined in the official ARM reference manuals.

![AArch32 decoding](/img/aarch32_hl.png)

![AArch64 decoding](/img/aarch64_hl.png)

The script will also try to automatically detect the accessed fields for some

registers:

![Field decoding](/img/scr_decode_bits.png)

## Usage

``Alt-F7`` in IDA Pro, then run the script on your open database.

## Compatibility

Should work with ARMv7 and ARMv8 processors.