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Kernel stack frame about arqvengeros HOT 3 CLOSED

champo avatar champo commented on May 23, 2024
Kernel stack frame

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Comments (3)

eordano avatar eordano commented on May 23, 2024

Esto en el SOS nunca lo pude implementar. En algún lado oscuro fallaba.

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champo avatar champo commented on May 23, 2024

Segun lei, el tema esta en que si o si hay que usar Task Gates. Linux lo hace usando un solo task que va manipulando a lo negro.

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eordano avatar eordano commented on May 23, 2024

Más o menos: Podés a lo negro reemplazar tu ESP por el del kernel apenas llegas del "userspace" y después recuperarlo.

Task Gates necesitás si o si para tener un verdadero User Space, pero un stack frame para el kernel es hacible de manera trucha (desde el userspace podés acceder).

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