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Kernel stack frame #18

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champo opened this issue Sep 27, 2011 · 3 comments
Closed

Kernel stack frame #18

champo opened this issue Sep 27, 2011 · 3 comments
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@champo
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feature improvement
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Milestone 7

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@champo
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champo commented Sep 27, 2011

Create a kernel only stack frame for use when handling interrupts.
@eordano
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eordano commented Oct 30, 2011

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

@champo
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champo commented Oct 30, 2011

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.

@eordano
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eordano commented Oct 30, 2011

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).

@ghost ghost assigned champo Nov 1, 2011
@champo champo closed this as completed in a14e7d0 Nov 2, 2011
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