Date: Thu, 13 Nov 2008 04:18:22 -0800 From: Jeremy Chadwick <koitsu@FreeBSD.org> To: Markus Hoenicka <markus.hoenicka@mhoenicka.de> Cc: freebsd-questions@FreeBSD.org Subject: Re: dlsym can't use handle returned by dlopen? Message-ID: <20081113121822.GA20600@icarus.home.lan> In-Reply-To: <20081113082402.GA14906@icarus.home.lan> References: <18715.28127.306511.577084@yeti.mininet> <20081113042912.GA10018@icarus.home.lan> <20081113090021.less3h5iwwsgwsg4@webmail.df.eu> <20081113081456.GA14564@icarus.home.lan> <20081113092059.gjjufgrxss0gwww0@webmail.df.eu> <20081113082402.GA14906@icarus.home.lan>
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On Thu, Nov 13, 2008 at 12:24:02AM -0800, Jeremy Chadwick wrote: > On Thu, Nov 13, 2008 at 09:20:59AM +0100, Markus Hoenicka wrote: > > Quoting Jeremy Chadwick <koitsu@FreeBSD.org>: > > > >> When I looked at the resulting symbol names using nm or objdump, certain > >> characters were prepended to them. There's a gcc or ld flag which > >> disables this behaviour. I'll have to dig around to remind myself what > >> it is. Once I read about it, it made perfect sense. > >> > >> Again, if you want me to write some code and provide some output of > >> what I'm talking about, I can do so. > >> > > > > I'd greatly appreciate any help here. I feel what I'm doing now is > > writing ugly hacks to make things work somehow. I'd prefer to do it > > properly. > > No problem. I'll try to get something small/simple written up tonight > (I'm at work right now) and send it out. As promised: http://www.malkavian.com/~jdc/myprog.tar.gz I couldn't figure out what the gcc flag was that I needed to keep certain characters from getting prepended to the symbol names. I believe the char added was an underscore, but I could be wrong. Either way, the example should help you, I think. (You can change RTLD_LAZY to RTLD_NOW and it still functions as expected) -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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