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SubjectRe: [Devel] Re: [RFC] Virtualization steps

> How would that work when x86-64 32bit programs have 4GB of address
> space and native on i386 programs only 3GB?

It is not the only obstacle. There are another ones:

1. Different values of segment registers. __USER32_* selectors should match
ones on i386.
2. ia32 vsyscall page. It also must be the same, unless arch/i386 is changed
to allow various mappins like 32bit page x86_64 works.

Well, if we want something to migrate, we have to pay.

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