Linus Torvalds writes: (Summary) On Tue, Dec 12, 2017 at 11:21 AM, Thomas Gleixner <tglx@linutronix.de> We end up loading the selector for %gs and %fs, and
those selectors end up being connected with whatever user-mode has set
up for them.
up for them.
We then set the FS/GS base pointer to a kernel-specific value, but that is _separately_ from the actual accessed bit that is in the selector.
selector.
So the kernel doesn't care, but the kernel definitely uses them. So the kernel doesn't care, but the kernel definitely uses them. Linus
Linus
Linus
up for them.
We then set the FS/GS base pointer to a kernel-specific value, but that is _separately_ from the actual accessed bit that is in the selector.
selector.
So the kernel doesn't care, but the kernel definitely uses them. So the kernel doesn't care, but the kernel definitely uses them. Linus
Linus
Linus