Hello,
I've some questions about IA-32e in Linux.
- What is the FS and GS segments role inside the kernel ?
(I was thinking about thread local storage)
- When I do a "mov %fs ..." instruction (in a module), it seems that %fs is
equal to 0 (idem for %gs). Are these registers not always filled ?
- What is the purpose of MSR_FS_BASE and MSR_GS_BASE ?
(I thought they were filled with "gdt[fs_entry].base")
- My last question is about the kernel programation of multi-core (or
multiprocessor)
architecture. I don't see a lot of documentation about that on Internet.
Do you have some docs/urls about this topic.
Maybe you can briefly explain how the execution flow are given to the
different cores.
Thanks in advance.
Eric
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