mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-06-10 00:03:54 +02:00
Kevin Thomas
63 lines
3.3 KiB
XML
63 lines
3.3 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">Memory Sections</text>
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<text x="600" y="88" text-anchor="middle" class="dim">Where Variables Live After Compilation</text>
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<!-- .data Section -->
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<rect x="40" y="110" width="1120" height="170" rx="8" class="pnl"/>
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<rect x="60" y="130" width="180" height="40" rx="6" fill="#0f1a0f" stroke="#00ff41" stroke-width="2"/>
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<text x="150" y="157" text-anchor="middle" class="grn">.data</text>
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<text x="260" y="157" class="txt">Flash -> copied to RAM at startup</text>
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<text x="60" y="200" class="dim">Contains: Initialized global/static variables</text>
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<text x="60" y="230" class="cyn">int counter = 42;</text>
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<text x="60" y="260" class="dim">Initial value stored in flash, copied to SRAM by data_cpy</text>
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<!-- .bss Section -->
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<rect x="40" y="295" width="1120" height="170" rx="8" class="pnl"/>
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<rect x="60" y="315" width="180" height="40" rx="6" fill="#1a0a0a" stroke="#ff0040" stroke-width="2"/>
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<text x="150" y="342" text-anchor="middle" class="red">.bss</text>
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<text x="260" y="342" class="txt">RAM — zeroed at startup</text>
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<text x="60" y="385" class="dim">Contains: Uninitialized global/static variables</text>
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<text x="60" y="415" class="cyn">int counter;</text>
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<text x="60" y="445" class="dim">NOT stored in binary (saves space!) — memset to 0 at boot</text>
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<!-- .rodata Section -->
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<rect x="40" y="480" width="1120" height="170" rx="8" class="pnl"/>
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<rect x="60" y="500" width="180" height="40" rx="6" fill="#0a0a1f" stroke="#00d4ff" stroke-width="2"/>
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<text x="150" y="527" text-anchor="middle" class="cyn">.rodata</text>
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<text x="260" y="527" class="txt">Flash — read only</text>
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<text x="60" y="570" class="dim">Contains: Constants and string literals</text>
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<text x="60" y="600" class="amb">const int MAX = 100;</text>
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<text x="60" y="630" class="dim">Lives in flash permanently — cannot be modified at runtime</text>
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<!-- Summary Table -->
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<rect x="40" y="665" width="1120" height="115" rx="8" class="pnl"/>
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<text x="80" y="700" class="grn">.data</text>
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<text x="260" y="700" class="txt">RAM</text>
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<text x="420" y="700" class="dim">Writable</text>
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<text x="600" y="700" class="dim">Initialized globals</text>
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<text x="80" y="730" class="red">.bss</text>
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<text x="260" y="730" class="txt">RAM</text>
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<text x="420" y="730" class="dim">Writable</text>
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<text x="600" y="730" class="dim">Uninitialized globals (zeroed)</text>
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<text x="80" y="760" class="cyn">.rodata</text>
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<text x="260" y="760" class="txt">Flash</text>
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<text x="420" y="760" class="dim">Read-only</text>
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<text x="600" y="760" class="dim">Constants & strings</text>
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</svg> |