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Date: Thu, 25 Jan 2007 02:29:00 -0000
From: Bin Chen <binary.chen@gmail.com>
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To: Bin Chen <binary.chen@gmail.com>,  gdb@sourceware.org
Subject: Re: attach gdbserver to itself
References: <45B75585.2030900@gmail.com> <20070124125141.GA3370@nevyn.them.org> <45B7575F.80303@gmail.com> <20070124130510.GA3676@nevyn.them.org> <45B75D05.9030104@gmail.com> <20070124132705.GA5106@nevyn.them.org>
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Daniel Jacobowitz wrote:
> On Wed, Jan 24, 2007 at 09:20:05PM +0800, Bin Chen wrote:
>   
>> But I can do get the backtrace if I running the program through 
>> gdbserver, not dynamic attach when fault.
>>     
>
> That's probably because you aren't inside a called signal handler in
> that case.
>
>   
>> Anyway, I will try to compile 6.6 to ARM platform, is it supported in 
>> the release?
>>     
>
> Yes, but you will have to set solib-absolute-prefix by hand or compile
> it using --with-sysroot (see the manual).
>   

I know what happens now. Seems gdb need unstripped libc-2.3.2.so or 
other important libs. The libs in my device rootfs are stripped so it 
can't get the backtrace properly. After changing solib-absolute-prefix 
to another unstripped version , the gdb can work now...

Something weird is that why manully start prog by gdbserver can get the 
right result...