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This commit introduces usage of swapgs to switch out the GS register
with the user GS register. An md_td_kick() function is also introduced
to start up user threads. The this_cpu() function uses the GS register
to read the current CPU structure using a new "self" field.
Signed-off-by: Ian Moffett <ian@osmora.org>
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Add macros that perform certain operations before invoking the actual
handler. This will be useful in the future for more complicated
operations that need to be done before the handler is ran.
Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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