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<str<strong>on</strong>g>SMEP</str<strong>on</strong>g><br />
• If CR4.<str<strong>on</strong>g>SMEP</str<strong>on</strong>g> = 1, instructi<strong>on</strong>s may not be<br />
fetched from any user-mode address.<br />
(according to Intel)<br />
• CR4 register can be modified using standard<br />
MOV instructi<strong>on</strong>s<br />
• Clear the <str<strong>on</strong>g>SMEP</str<strong>on</strong>g> bit: mov $0x1407e0, %cr4