mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-07-12 23:26:33 +02:00
Kevin Thomas
71 lines
3.4 KiB
XML
71 lines
3.4 KiB
XML
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 800">
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<style>
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.bg{fill:#0a0a0f}.pnl{fill:#12121a;stroke:#1a1a2e}.hdr{fill:#12121a}
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.title{font:bold 42px 'Courier New',monospace;fill:#00ff41}
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.sub{font:bold 28px 'Courier New',monospace;fill:#00d4ff}
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.txt{font:24px 'Courier New',monospace;fill:#c0c0c0}
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.dim{font:20px 'Courier New',monospace;fill:#888}
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.grn{font:bold 24px 'Courier New',monospace;fill:#00ff41}
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.red{font:bold 24px 'Courier New',monospace;fill:#ff0040}
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.cyn{font:bold 24px 'Courier New',monospace;fill:#00d4ff}
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.amb{font:bold 24px 'Courier New',monospace;fill:#ffaa00}
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.badge{stroke:#00ff41;rx:14}
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</style>
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<rect class="bg" width="1200" height="800"/>
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<!-- Title -->
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<text x="600" y="52" text-anchor="middle" class="title">Double in Ghidra</text>
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<text x="600" y="88" text-anchor="middle" class="dim">Analyzing 42.52525 in memory</text>
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<!-- Decompiled View -->
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<rect x="40" y="110" width="540" height="230" rx="8" class="pnl"/>
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<text x="310" y="148" text-anchor="middle" class="sub">Decompiled main()</text>
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<rect x="60" y="168" width="500" height="150" rx="4" fill="#0a0a0f" stroke="#1a1a2e" stroke-width="1"/>
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<text x="80" y="198" class="cyn">int main(void) {</text>
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<text x="110" y="228" class="txt">double fav_num</text>
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<text x="110" y="258" class="amb"> = 42.52525;</text>
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<text x="110" y="288" class="txt">stdio_init_all();</text>
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<text x="80" y="308" class="cyn">}</text>
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<!-- Key Difference from Float -->
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<rect x="620" y="110" width="540" height="230" rx="8" class="pnl"/>
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<text x="890" y="148" text-anchor="middle" class="sub">Key Difference</text>
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<text x="640" y="188" class="txt">Float (42.5):</text>
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<text x="640" y="218" class="dim">r2 = 0x00000000 (zero!)</text>
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<text x="640" y="248" class="dim">r3 = 0x40454000</text>
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<text x="640" y="288" class="grn">Double (42.52525):</text>
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<text x="640" y="318" class="amb">r2 = 0x645A1CAC (non-zero!)</text>
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<!-- Register Pair -->
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<rect x="40" y="360" width="1120" height="170" rx="8" class="pnl"/>
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<text x="600" y="398" text-anchor="middle" class="sub">Register Pair r2:r3</text>
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<rect x="60" y="418" width="520" height="55" rx="4" fill="#0a0a0f" stroke="#ffaa00" stroke-width="1"/>
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<text x="80" y="445" class="amb">r3 (HIGH):</text>
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<text x="280" y="445" class="grn">0x4045433B</text>
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<rect x="620" y="418" width="520" height="55" rx="4" fill="#0a0a0f" stroke="#ffaa00" stroke-width="1"/>
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<text x="640" y="445" class="amb">r2 (LOW):</text>
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<text x="830" y="445" class="grn">0x645A1CAC</text>
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<text x="60" y="510" class="dim">Combined: 0x4045433B645A1CAC = 42.52525</text>
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<!-- Assembly View -->
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<rect x="40" y="550" width="1120" height="230" rx="8" class="pnl"/>
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<text x="600" y="588" text-anchor="middle" class="sub">Assembly (ldrd)</text>
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<rect x="60" y="608" width="700" height="140" rx="4" fill="#0a0a0f" stroke="#1a1a2e" stroke-width="1"/>
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<text x="80" y="638" class="cyn">ldrd r2,r3,[PC,#0x10]</text>
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<text x="80" y="668" class="dim">; Loads BOTH words at once</text>
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<text x="80" y="698" class="dim">; r2 gets low word</text>
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<text x="80" y="728" class="dim">; r3 gets high word</text>
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<rect x="780" y="608" width="360" height="140" rx="4" fill="#0a0a0f" stroke="#00ff41" stroke-width="1"/>
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<text x="800" y="648" class="grn">ldrd = Load</text>
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<text x="800" y="678" class="grn">Register</text>
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<text x="800" y="708" class="grn">Doubleword</text>
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<text x="800" y="738" class="dim">ARM Cortex-M33</text>
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</svg> |