Date: Wed, 07 Sep 2016 18:18:20 -0500 From: Justin Hibbits <chmeeedalf@gmail.com> To: Krzysztof Parzyszek <kristof@swissmail.org>,freebsd-ppc@freebsd.org Subject: Re: From llvm: Fwd: [Bug 26519] Clang 3.8.0's "Target: powerpc-unknown-freebsd11.0" code generation is violating the SVR4 ABI (SEGV can result) [fixed in llvm -r280705] Message-ID: <9CDB0CBC-0B7E-4746-B4BC-418C4DF5540A@gmail.com> In-Reply-To: <e6771fa1-6cc9-6bd9-48de-421c829c4e59@swissmail.org> References: <bug-26519-7604-VMzNnQls1g@http.llvm.org/bugs/> <08136189-299F-4BD6-9E49-8D39A8913D62@dsl-only.net> <0E2783E3-277F-47F1-B696-46FCFF0DB0F1@dsl-only.net> <e6771fa1-6cc9-6bd9-48de-421c829c4e59@swissmail.org>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On September 7, 2016 5:50:17 PM CDT, Krzysztof Parzyszek <kristof@swissmail.org> wrote: >What are the requirements for soft-float, i.e. what conditions exactly >does the generated code need to meet? Is the purpose of it to eliminate > >the use of floating point registers? > >Is there a library that implements the floating point operations? If >not, that is going to be the main obstacle. > >-Krzysztof > > > >On 9/6/2016 8:04 AM, Mark Millard wrote: >> llvm's bugzilla reports that the stack-handling SVR4 ABI violation >for TARGET_ARCH=powerpc has been fixed r280705 (likely on trunk)! See >below. >> >> This still leaves some problems in the C++ Itanium ABI exception >handling support for both powerpc64 and powerpc. Also powerpc64 does >not have softfloat available --which blocks libstand from building. >Overall the META llvm bug 25780 still lists 3 "depends on" defects >pending. One has a partial fix out for review. >> >> >> >> Begin forwarded message: >> >>> From: bugzilla-daemon at llvm.org >>> Subject: [Bug 26519] Clang 3.8.0's "Target: >powerpc-unknown-freebsd11.0" code generation is violating the SVR4 ABI >(SEGV can result) >>> Date: September 6, 2016 at 5:31:17 AM PDT >>> To: <markmi at dsl-only.net> >>> >>> Krzysztof Parzyszek changed bug 26519 >>> What Removed Added >>> Status NEW RESOLVED >>> Resolution --- FIXED >>> >>> Comment # 6 on bug 26519 from Krzysztof Parzyszek >>> Committed in r280705. >>> >>> You are receiving this mail because: >>> • You reported the bug. >> >> Begin forwarded message: >> >>> From: bugzilla-daemon at llvm.org >>> Subject: [Bug 25780] [META] Using Clang as the FreeBSD/ppc system >compiler >>> Date: September 6, 2016 at 5:31:20 AM PDT >>> To: <markmi at dsl-only.net> >>> >>> Bug 25780 depends on bug 26519, which changed state. >>> What Removed Added >>> Status NEW RESOLVED >>> Resolution --- FIXED >>> >>> You are receiving this mail because: >>> • You are on the CC list for the bug. >> >> === >> Mark Millard >> markmi at dsl-only.net >> >> On 2016-Sep-1, at 8:08 AM, Mark Millard <markmi at dsl-only.net> >wrote: >> >> https://reviews.llvm.org/D24093 is a code review for llvm potentially >fixing the violation of the TARGET_ARCH=powerpc SVR4 ABI stack handling >rules, no longer requiring a "red-zone" on the stack. See below for >more information. >> >> === >> Mark Millard >> markmi at dsl-only.net >> >> Begin forwarded message: >> >> From: bugzilla-daemon at llvm.org >> Subject: [Bug 26519] Clang 3.8.0's "Target: >powerpc-unknown-freebsd11.0" code generation is violating the SVR4 ABI >(SEGV can result) >> Date: September 1, 2016 at 7:22:49 AM PDT >> To: <markmi at dsl-only.net> >> >> >> Comment # 5 on bug 26519 from Krzysztof Parzyszek >> Patch for review: https://reviews.llvm.org/D24093 >> >> You are receiving this mail because: >> • You reported the bug. >> >> >> _______________________________________________ >> freebsd-ppc@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-ppc >> To unsubscribe, send any mail to >"freebsd-ppc-unsubscribe@freebsd.org" >> > >_______________________________________________ >freebsd-ppc@freebsd.org mailing list >https://lists.freebsd.org/mailman/listinfo/freebsd-ppc >To unsubscribe, send any mail to "freebsd-ppc-unsubscribe@freebsd.org" Soft float is required when building the kernel to prevent the compiler from using floating point optimizations. - - Justin - -- Sent from my Android device with K-9 Mail. Please excuse my brevity. -----BEGIN PGP SIGNATURE----- Version: APG v1.1.1 iQJDBAEBCgAtBQJX0KA7JhxKdXN0aW4gSGliYml0cyA8Y2htZWVlZGFsZkBnbWFp bC5jb20+AAoJEMpa9wk3xc9DbNEP/j9vlkf4CKbKJe0tckSNntH7xEcCDziiM2M6 31iPRhy1HOXN8E0H3FoiCAod5ji4W98tdz3yzTOVlbsXbMJI4u/ArUR69Q6L9CGO +iQK2Y9ViAi9YpG+vbKiJPD0FpLXLm0Gh2QkJkkz22dB62ps/05WAI3KynZyQJQQ FTS4aLvubA3qS0GYTNTaqZE7Ei69fCuMd+LTVw4Jbln/sL/pXgTD0/2HdKc5rctP c21Yplv6s7oRNX8+U0j1qEGIvJTPl7r0O4Y36gO1fmYq7Wm10n2ANF/5fwKIsmeM aRsADYJvdEGCpCnd7wgsfLuPWqQ8VZspi8a+5EkbgrzMlcDRtgQ2R7Ba14MQ96vo UAWPLS3bOiTKNGEQJw042vLS4WFVnY6f7DBXkkRlmM0QPaTb72MGPovyMJvPuxUe YqrUhXlvZXAu8afQWYh8e5fDEGubRCT0cJGCc1QIthlWSebdOLE9j7pKjy8vlUqr p7Eri4hUft0s0yGIK1MFcbULXvYfZ3Sv6jYrWuvI9dH73jutyEbsb54orO+vWolj xSnCpZUHrEXDNdzS1uu1CahrHNWTlhga/8pXm8B8FWcq9ewIAKlzC0En7/xxmmFJ FSungWLZLtXzYpG3ZVD8WBR0tQBmeyTFXtDqLPyyuhQWRx3fCFd3tUhYXdgwFSVJ h9CxqDh+ =SBgN -----END PGP SIGNATURE-----
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