Date: Mon, 08 Feb 2016 16:37:18 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 206990] powerpc (32-bit), projects/clang380-import vs. 11.0-CURRENT's sendsig: need to avoid signal delivery trashing the stack and so causing SIGSEGV Message-ID: <bug-206990-8-zVIRUeHhMD@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-206990-8@https.bugs.freebsd.org/bugzilla/> References: <bug-206990-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D206990 Justin Hibbits <jhibbits@FreeBSD.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jhibbits@FreeBSD.org --- Comment #6 from Justin Hibbits <jhibbits@FreeBSD.org> --- (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 sou= rce code to this regard, to the effect: (PPCFrameLowering.cpp): // FIXME: On PPC32 SVR4, we must not spill before claiming the stackfra= me. If a signal interrupts the thread at the precise wrong time (when creating = the stack frame, but before adjusting %r1), Bad Things will happen. --=20 You are receiving this mail because: You are the assignee for the bug.=
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