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]

[Justin Hibbits]

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On September 7, 2016 5:50:17 PM CDT, Krzysztof Parzyszek <kristof at 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.
>>
>>
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>> https://lists.freebsd.org/mailman/listinfo/freebsd-ppc
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>"freebsd-ppc-unsubscribe at freebsd.org"
>>
>
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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.
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