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Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit?

From "H. Peter Anvin" <hpa@zytor.com>
Newsgroups linux.kernel
Subject Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit?
Date 2015-12-18 22:00 +0100
Message-ID <qHai5-280-3@gated-at.bofh.it> (permalink)
References (7 earlier) <qH8gi-QC-7@gated-at.bofh.it> <qH8T0-1js-7@gated-at.bofh.it> <qH9vI-1NI-21@gated-at.bofh.it> <qH9YK-1YM-13@gated-at.bofh.it> <qHa8q-23k-23@gated-at.bofh.it>
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On 12/18/2015 12:49 PM, Andy Lutomirski wrote:
> 
> IOW, I like my idea in which signal delivery always sets PKRU to the
> application-requested-by-syscall values and sigreturn restores it.
> Kinda like sigaltstack, but applies to all signals and affects PKRU
> instead of RSP.
> 

I think this is the only sensible option, with the default being all zero.

	-hpa


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Thread

Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Andy Lutomirski <luto@kernel.org> - 2015-12-18 02:50 +0100
  Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Dave Hansen <dave.hansen@linux.intel.com> - 2015-12-18 03:20 +0100
    Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Andy Lutomirski <luto@amacapital.net> - 2015-12-18 03:40 +0100
      Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Dave Hansen <dave.hansen@linux.intel.com> - 2015-12-18 04:00 +0100
        Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Andy Lutomirski <luto@amacapital.net> - 2015-12-18 06:30 +0100
          Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? "H. Peter Anvin" <hpa@zytor.com> - 2015-12-18 07:50 +0100
            Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Andy Lutomirski <luto@amacapital.net> - 2015-12-18 17:10 +0100
              Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Dave Hansen <dave.hansen@linux.intel.com> - 2015-12-18 18:00 +0100
              Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Dave Hansen <dave.hansen@linux.intel.com> - 2015-12-18 19:50 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Andy Lutomirski <luto@amacapital.net> - 2015-12-18 20:30 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Dave Hansen <dave.hansen@linux.intel.com> - 2015-12-18 21:10 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Andy Lutomirski <luto@amacapital.net> - 2015-12-18 21:30 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Linus Torvalds <torvalds@linux-foundation.org> - 2015-12-18 21:40 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Andy Lutomirski <luto@amacapital.net> - 2015-12-18 21:50 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? "H. Peter Anvin" <hpa@zytor.com> - 2015-12-18 22:00 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Andy Lutomirski <luto@amacapital.net> - 2015-12-18 22:10 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Dave Hansen <dave.hansen@linux.intel.com> - 2015-12-18 22:10 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Linus Torvalds <torvalds@linux-foundation.org> - 2015-12-18 22:10 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Dave Hansen <dave.hansen@linux.intel.com> - 2015-12-18 22:20 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Linus Torvalds <torvalds@linux-foundation.org> - 2015-12-18 22:50 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Andy Lutomirski <luto@amacapital.net> - 2015-12-18 23:30 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Linus Torvalds <torvalds@linux-foundation.org> - 2015-12-19 00:10 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Andy Lutomirski <luto@amacapital.net> - 2015-12-19 00:20 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Linus Torvalds <torvalds@linux-foundation.org> - 2015-12-19 00:30 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Dave Hansen <dave.hansen@linux.intel.com> - 2015-12-21 18:10 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Andy Lutomirski <luto@amacapital.net> - 2015-12-22 00:00 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Dave Hansen <dave.hansen@linux.intel.com> - 2015-12-22 00:10 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Andy Lutomirski <luto@amacapital.net> - 2015-12-22 00:10 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Dave Hansen <dave.hansen@linux.intel.com> - 2015-12-22 00:10 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Dave Hansen <dave.hansen@linux.intel.com> - 2015-12-22 00:10 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Andy Lutomirski <luto@amacapital.net> - 2015-12-22 00:10 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Dave Hansen <dave.hansen@linux.intel.com> - 2015-12-30 00:50 +0100
                Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Linus Torvalds <torvalds@linux-foundation.org> - 2015-12-18 22:20 +0100
          Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Ingo Molnar <mingo@kernel.org> - 2015-12-18 09:40 +0100
  Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Christoph Hellwig <hch@infradead.org> - 2015-12-18 10:00 +0100
    Re: Rethinking sigcontext's xfeatures slightly for PKRU's benefit? Borislav Petkov <bp@alien8.de> - 2015-12-18 14:00 +0100

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