https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206990

Justin Hibbits <[email protected]> changed:

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--- Comment #6 from Justin Hibbits <[email protected]> ---
(In reply to Mark Millard from comment #5)
There is no provision in the ABI for a redzone in 32-bit powerpc.  LLVM is
broken for 32-bit PowerPC regarding this, and there are comments in the source
code to this regard, to the effect:

(PPCFrameLowering.cpp):
    // FIXME: On PPC32 SVR4, we must not spill before claiming the stackframe.

If a signal interrupts the thread at the precise wrong time (when creating the
stack frame, but before adjusting %r1), Bad Things will happen.

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