RE: arm gdbserver and shared object function resolution

["Kevin \"Squail\" Endres" <kevine@wildseed.com>]

Got it now thanks to Kevins patience and help

Issues with native arm gdb were true low memory errors.

Issue with cross targeted remote were solved by:

1) the current snapshot of gdb (04-29-02).
2) making a copy of my target syslibs (ones linked in to my app being
debugged) on my host

CAVEAT: on first attempt i just used the libraries (glibc-2.2.3) from the
toolchain (built from sources)
these libraries did not work. I had to use a build of libc with
--libdir=/lib  (which i did for libraries in the RFS of my target)

3) set solib-absolute-prefix to location of sys-libs on my host machine -
NOTE: target and host libs do not need to be in the same directory (i.e. -
target libs in /lib  host instance of target libs in /target/lib -
`solib-absolute-prefix /target`).

:]k

  

riginal Message-----
From: Daniel Jacobowitz [mailto:drow@mvista.com]
Sent: Tuesday, April 30, 2002 8:00 AM
To: Kevin Squail Endres
Cc: 'Kevin Buettner'; 'gdb@sources.redhat.com'
Subject: Re: arm gdbserver and shared object function resolution


On Mon, Apr 29, 2002 at 05:59:03PM -0700, Kevin Squail Endres wrote:
> 
> 
> my symbols are loading correctly.
> 
> What I need to do: Break into the debugger inside a shared object either
> remotely or locally - platform is arm.
> 
> using 5.2 (the current snapshot was a little flaky..) I am seeing the
> following behavior
> (Note: arm target)
> 
> native arm gdb:
> run gdb targeted at app, set break at main - run - set break at function
> inside shared object - run
> RESULT: gdb dies (out of memory)
> 
> run app - run gdb targeted at app - attach to pid - set break at function
> inside shared object
> RESULT: gdb dies (out of memory)
> 
> cross-targeted:
> run target - run cross (read in symbol file) - set break - continue - i
get
> the error below.

Did you try Kevin's suggestion about solib-absolute-prefix?  That
should fix your warning about shared library breakpoints.

 -----Original Message-----

> It is critical that GDB be able to find your target's dynamic linker
> and load its symbols.  To do this, you normally use
> ``set solib-absolute-prefix'' to tell gdb where to find the sys-root
> for the target's libraries.  If you're not doing this, then perhaps
> that's your problem?
> 
> It is also important for the libraries in the sys-root location on
> the host to be exactly the same as those found on the target.  All
> kinds of strange things can happen if this is not the case.
> 
> Kevin
> 

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer