Date: Wed, 9 Mar 2016 09:58:16 -0800 From: Andy Lutomirski <luto@...capital.net> To: Andy Lutomirski <luto@...nel.org> Cc: X86 ML <x86@...nel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Borislav Petkov <bp@...en8.de>, "musl@...ts.openwall.com" <musl@...ts.openwall.com> Subject: Re: [RFC PATCH] x86/vdso/32: Add AT_SYSINFO cancellation helpers On Tue, Mar 8, 2016 at 5:24 PM, Andy Lutomirski <luto@...nel.org> wrote: > musl implements system call cancellation in an unusual but clever way. > When a thread issues a cancellable syscall, musl issues the syscall > through a special thunk that looks roughly like this: > FWIW, this patch fails disastrously on 64-bit kernels. I fixed it, but it needs kbuild changes. I'll send those out to the maintainers. --Andy
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