Linker MemMap Viewer

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Licence & Disclaimer

For development and debugging use only.

This tool is provided as-is, without warranty of any kind, express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, or non-infringement.

The individual or organisation deploying this tool accepts full responsibility for its use. The author(s) and any associated individual or organisation shall not be held liable for any direct, indirect, incidental, special, or consequential damages arising from the use of, or inability to use, this tool — including but not limited to data loss, incorrect memory analysis, or decisions made on the basis of output produced by this tool.

This tool is not validated for use in safety-critical, production, or certification contexts. Output must be independently verified before being relied upon in any engineering decision.

Use of this tool implies acceptance of these terms.

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Quick Start

pip install bottle          # one-time
python app.py               # browser opens automatically

Override port if needed:

python app.py 8080

Usage

Drop any combination of files — each is optional:

File	What it unlocks
.ld	Memory map, regions, sections, startup cost
.elf / .axf	Symbols, sizes, DMA warnings, addr→line
.map	Per-.o flash/RAM breakdown, GC'd sections

Toolchain

In the sidebar Prefix field, paste your toolchain path:

arm-none-eabi-
D:\NXP\S32DS.3.6.4\S32DS\build_tools\gcc_v11.4\gcc-11.4-arm32-eabi\bin\arm-none-eabi-
D:\NXP\S32DS.3.6.4\S32DS\build_tools\gcc_v11.4\gcc-11.4-arm32-eabi\bin\

Trailing dash, backslash, or forward slash all work — auto-detected.

Project Structure

lmv/
├── app.py              ← entry point, server, all routes
├── parsers/
│   ├── ld_parser.py    ← GCC linker script parser
│   ├── elf_parser.py   ← nm/readelf/size/addr2line + warnings
│   └── map_parser.py   ← .map file parser
├── static/
│   ├── app.css         ← all styles
│   ├── state.js        ← app state + feature registry
│   ├── drops.js        ← file drop/upload (isolated — the fix lives here)
│   ├── render.js       ← memory map SVG + sections + symbols + warnings
│   ├── tabs.js         ← bloat/startup/mapfile/dead code/addr2line/debug
│   ├── popups.js       ← modal popup system
│   └── utils.js        ← helpers, tooltip, init
└── templates/
    └── index.html      ← HTML shell, loads static files

Why File Selection Was Broken (and how it's fixed)

The monolithic version embedded JSON.stringify(obj) inside onclick="..." HTML attributes. The browser's HTML parser sees the first " in the JSON as the closing quote of the attribute — everything after that point was broken HTML. Since getElementById() returned null for all elements, no event listeners ever registered.

Fix: drops.js is the only file that touches file input. File inputs are display:none siblings of the drop area divs (not overlaid inside them). The div's click handler calls input.click() explicitly. All wiring runs in DOMContentLoaded so the DOM is guaranteed ready. No data is ever placed inside HTML attribute strings.