[Patch, ARM, ping1] Fix PR target/56846

[Jonathan Wakely]

On 26/11/14 17:23 -0000, Thomas Preud'homme wrote:
>Ping?

I'm OK with backporting it if a release manager approves it.


>> -----Original Message-----
>> From: gcc-patches-owner@gcc.gnu.org [mailto:gcc-patches-
>> owner@gcc.gnu.org] On Behalf Of Thomas Preud'homme
>> Sent: Wednesday, November 19, 2014 6:00 PM
>> To: Tony Wang; gcc-patches@gcc.gnu.org; dan@debian.org; aph-
>> gcc@littlepinkcloud.com; Richard Earnshaw; Ramana Radhakrishnan;
>> libstdc++@gcc.gnu.org
>> Subject: RE: [Patch ARM] Fix PR target/56846
>>
>> > From: gcc-patches-owner@gcc.gnu.org [mailto:gcc-patches-
>> > owner@gcc.gnu.org] On Behalf Of Tony Wang
>> >
>>
>> >
>> > Hi all,
>> >
>> > The bug is reported at
>> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56846, and it’s about the
>> > problem that
>> > when exception handler is involved in the function, then
>> > _Unwind_Backtrace function will run into deadloop on
>> > arm target.
>>
>> The patch (in r215101) can be backported without any change on 4.8 and
>> 4.9 branches. I checked in QEMU with and without the patch on both
>> branches and it indeed solves the problem.
>>
>> Testsuite run without regression when compiled with arm-none-eabi
>> cross compiler and executed on QEMU emulating Cortex-M3.
>>
>> I also bootstrapped gcc on x86_64-linux-gnu and run the testsuite
>> without
>> regressions.
>>
>> Is it ok for backport?
>>
>> Best regards,
>>
>> Thomas
>>
>>
>>
>>
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