[WIP] Basic Userspace #81
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phil-opp
reviewed
Apr 29, 2019
| let iomap_addr = (&tss.iomap) as *const _ as usize; | ||
| let iomap_base = (iomap_addr - tss_addr) as u16; | ||
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| tss.tss.get_mut().iomap_base = iomap_base; |
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I don't think that this approach works. The iomap_addr points to your local stack frame, which is no longer valid after the function returns.
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It does work, as the iomap base is relative to the TSS start address's. This is why it is iomap_addr - tss_addr. Otherwise yes, it wouldn't work.
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Ah sorry, I confused RefCell and Rc and thought that the tss lived on the heap.
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Oh, I may have forgot to add the size of the TSS. Not sure if that's needed... In testing it has worked though.
…ve -- I think)" This reverts somes lines of commit 3894986
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This PR will add a basic userspace to flower -- just enough to jump into userspace (in code located inside the kernel) and do some things there. It will not add program loading or elf parsing,