Date: Thu, 29 Apr 2004 10:45:34 -0400 From: Eric Jacobs <eric@theeric.com> To: freebsd-hackers@freebsd.org Subject: Re: Extracting symbol info out of processes at runtime Message-ID: <20040429104534.17951b8a.eric@theeric.com> In-Reply-To: <1083243107.640.13.camel@edinburgh.thedarkside.tix> References: <1083167960.653.23.camel@edinburgh.thedarkside.tix> <xzpekq7ynjm.fsf@dwp.des.no> <1083243107.640.13.camel@edinburgh.thedarkside.tix>
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On Thu, 29 Apr 2004 14:51:47 +0200 "P. de Boer" <pieter@thelostparadise.com> wrote: > > On Thu, 2004-04-29 at 14:30, Dag-Erling Smørgrav wrote: > > "P. de Boer" <pieter@thelostparadise.com> writes: > > > For a little private project I'm working at, I need to find the address > > > of a function which is inside a shared library of a running process, OR > > > the base address the library is running at > > > > man dlinfo > > Well, yes, dlinfo() would be very useful, if it was not for my wish to > read the link_map from another proces, using ptrace(). I've looked at > rtld-elf.c, to see what dlinfo() does: it finds the object by the given > address and then 'returns' the link_map for that object. However, I > can't find out where this info would be in the memory image of a running > process. Have a look at /proc/NNN/map (If trying to read it gives you "File too large", try it with a bigger buffer size.) The segment load address is in the leftmost column. Eric
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