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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. Rich Felker‏ @RichFelker Aug 7

      Uhg, gcc is doing the idiotic llvm thing of maximally-hoisting large stack usage, and also float usage (saving call-saved float regs). This surprisingly leads to hardfloat code SIGILL'ing on nofpu machines even when the float code is never reached.

      2 replies 0 retweets 1 like
    2. Eric Gallager‏ @cooljeanius Aug 7
      Replying to @RichFelker

      there a bug open for it yet?

      1 reply 0 retweets 0 likes
    3. Rich Felker‏ @RichFelker Aug 7
      Replying to @cooljeanius

      It's not strictly a "bug", but a QoI issue that can cause code that "should" work at a given stack size to stack overflow, and that hurts performance in some code paths.

      1 reply 0 retweets 1 like
    4. Rich Felker‏ @RichFelker Aug 7
      Replying to @RichFelker @cooljeanius

      I think it's known that gcc shrinkwraps poorly, but I'm not sure if I found new things that aren't already known.

      2 replies 0 retweets 1 like
    5. Alexander Monakov‏ @_monoid Aug 8
      Replying to @RichFelker @cooljeanius

      Would you prefer a user to not bring up an issue they have with musl when they are unsure whether it's already known? Would you prefer them not bring it up when they are sure it was known, but was last discussed couple of years back as far as they know?

      1 reply 0 retweets 1 like
    6. Rich Felker‏ @RichFelker Aug 8
      Replying to @_monoid @cooljeanius

      No, I'm looking into it before posting though.

      1 reply 0 retweets 1 like
      Rich Felker‏ @RichFelker Aug 8
      Replying to @RichFelker @_monoid @cooljeanius

      I want to construct a minimal mips example that saves and restores fpu regs in a non-float code path.

      7:14 AM - 8 Aug 2018
      • 1 Like
      • Eric Gallager
      0 replies 0 retweets 1 like

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