Messages in this thread | | | From | Florian Weimer <> | Subject | Re: [PATCH v11 25/25] x86/cet/shstk: Add arch_prctl functions for shadow stack | Date | Thu, 27 Aug 2020 15:18:39 +0200 |
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* Dave Martin:
> You're right that this has implications: for i386, libc probably pulls > more arguments off the stack than are really there in some situations. > This isn't a new problem though. There are already generic prctls with > fewer than 4 args that are used on x86.
As originally posted, glibc prctl would have to know that it has to pull an u64 argument off the argument list for ARCH_X86_CET_DISABLE. But then the u64 argument is a problem for arch_prctl as well.
Thanks, Florian
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