UnmapProcessMemory: Verify that the src page list == dst page list.

[todo]

In UnmapProcessMemory, we don't ensure that src_address is correct, that is, we don't check that the frames in the dst match the frame in the src. HOS/NX does this by building a PageList (essentially a vector of frames) and comparing them.
We could do something similar by iterating over the Mappings and checking if their Frames + PhysOffset are equals.

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SunriseOS/kernel/src/syscalls.rs

Lines 954 to 964 in 27ab3e4

	// TODO: UnmapProcessMemory: Verify that the src page list == dst page list.
	// BODY: In UnmapProcessMemory, we don't ensure that src_address is correct,
	// BODY: that is, we don't check that the frames in the dst match the frame
	// BODY: in the src. HOS/NX does this by building a PageList (essentially
	// BODY: a vector of frames) and comparing them.
	// BODY:
	// BODY: We could do something similar by iterating over the Mappings and
	// BODY: checking if their Frames + PhysOffset are equals.
	// Unmap.
	while size != 0 {

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This issue was generated by todo based on a TODO comment in 27ab3e4 when #458 was merged. cc @roblabla.