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Hardened WebKit JIT Mapping<br />
Tying it all toge<strong>the</strong>r<br />
Writable mapping to JIT region is randomly located<br />
Emit specialized memcpy <strong>with</strong> base destination address encoded as immediate values<br />
Make it execute-only<br />
Discard <strong>the</strong> address of <strong>the</strong> writable mapping<br />
Use specialized memcpy for all JIT write operations