Re: [Libunwind-devel] mips implementation of libunwind SEGV Faulting

[John Knight]

Hi Dave,

I don't have a backtrace for the segv... the backtrace is what we want to use 
libunwind for! :-)

I will try versions 1.1 and 1.0 and see what happens with those.  It may take 
me awhile as my time for this effort is essentially on the back burner.  I will 
let you know.

John


-----Original Message-----
From: Dave Watson [mailto:address@hidden
Sent: Friday, January 27, 2017 8:09 AM
To: John Knight
Cc: address@hidden
Subject: Re: [Libunwind-devel] mips implementation of libunwind SEGV Faulting

On 01/27/17 02:17 AM, John Knight wrote:
> Thanks for the missing .h file for the mips.  With that file, I was able to 
> successfully build the libunwind library files for mips.  I have verified 
> that the libraries built are all MIPS. However, when I go to test the 
> backtrace with the same application as I had tested successfully with arm, it 
> causes the app to SEGV fault (signal 11).   Was the mips implementation 
> validated with the 1.2 release?  I am running GNU/linux 2.6.36.  I used -g 
> -O0 options when compiling libraries and the app, which should turn off all 
> optimization.
>
> I have attached a copy of the app's backtrace.c which I am using to
do the backtrace using libunwind.

Do you have a backtrace from the segv, using gdb or something?

> I am interested in knowing what you think?  I would like to hear if anyone 
> else is seeing issue with the Mips implementation?

I don't have a mips machine at the moment (somewhere on my list of
things to do).  Do v1.1 or v1.0 work for you?   There were only a
small handful of mips-specific diffs between versions, should be easy to bisect 
if so.

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