Messages in this thread | | | From | Andy Lutomirski <> | Date | Thu, 18 Jun 2020 11:08:31 -0700 | Subject | Re: [PATCH v13 00/16] Enable FSGSBASE instructions |
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On Thu, Jun 18, 2020 at 7:18 AM Thomas Gleixner <tglx@linutronix.de> wrote: > > Sasha, > > Sasha Levin <sashal@kernel.org> writes: > > Changes from v12: > > - Reformat the series to be closer to the reverted codebase for easier > > review. > > - Drop a few of the changes introduced in v8 and v9. > > I've pushed the lot out to > > git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/fsgsbase > > Thanks for taking this up! >
Is there a plan to deal with:
/* * This function has some ABI oddities. * * A 32-bit ptracer probably expects that writing FS or GS will change * FSBASE or GSBASE respectively. In the absence of FSGSBASE support, * this code indeed has that effect. When FSGSBASE is added, this * will require a special case. * * For existing 64-bit ptracers, writing FS or GS *also* currently * changes the base if the selector is nonzero the next time the task * is run. This behavior may? not be needed, and trying to preserve it * when FSGSBASE is added would be complicated at best. */
in arch/x86/kernel/ptrace.c?
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