| ▲ | tliltocatl 3 days ago |
| But that wouldn't protect against out-of boundary access (which is the whole point of segments), would it? |
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| ▲ | convolvatron 2 days ago | parent [-] |
| thats enforced by the VM hardware - we just shuffle the PTEs around to match the appropriate segment view |
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| ▲ | rep_lodsb 2 days ago | parent [-] | | As long as it's a linear address space, adding/subtracting a large enough value to a pointer (array, stack) could still cross into another "segment". | | |
| ▲ | convolvatron a day ago | parent [-] | | but those wouldn't be mapped unless you have crossed a call gate that enabled them. the kernel call gate implementation changes the VM map (region visibility) accordingly |
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