Messages in this thread | | | Date | Sun, 10 May 2020 17:50:28 -0700 | From | Andi Kleen <> | Subject | Re: [PATCH v10 00/18] Enable FSGSBASE instructions |
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> So this is a check that checks if you're running in user mode if > you have a debug trap with single step, but somehow it triggered > for a user segment. > > Probably the regs got corrupted. > > Sasha, I suspect you're missing a mov %rsp,%rdi somewhere in the > debug entry path that sets up the regs argument for the C code.
... Ah never mind. Thomas has a better explanation.
-Andi
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