Date: Fri, 8 Jun 2001 13:23:21 -0400 From: Alfred Perlstein <bright@rush.net> To: Kevin Day <toasty@temphost.dragondata.com> Cc: Dan Nelson <dnelson@emsphone.com>, hackers@FreeBSD.ORG Subject: Re: Access to symbol table(including dynamics) at runtime Message-ID: <20010608132320.F1832@superconductor.rush.net> In-Reply-To: <200106081720.MAA43236@temphost.dragondata.com>; from toasty@temphost.dragondata.com on Fri, Jun 08, 2001 at 12:20:26PM -0500 References: <20010608121616.A23647@dan.emsphone.com> <200106081720.MAA43236@temphost.dragondata.com>
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* Kevin Day <toasty@temphost.dragondata.com> [010608 13:21] wrote: > > > > In the last episode (Jun 08), Kevin Day said: > > > Is there a simple way that I can lookup a symbol name(by address) > > > during runtime? > > > > > > I know I can exec nm, look up for the address I need, and get local > > > symbols, but it would be really nice if I could get addresses of > > > functions in dynamic libraries as well. I know I could use ldd to get > > > offsets of each .so and calculate from there, but I'm starting to > > > think I'm reproducing work that was done somewhere else. > > > > > > If someone could point me at a man page to something that can do what > > > I need, tell me of a library that does something similar, or tell me > > > why this can't be done, i'd be very thankful. :) > > > > Would dladdr() do what you want? > > > AHH! YES! > > I'll buy a beer to the first person who adds dladdr(3) to the SEE ALSO > section of dlopen's man page. If you want to be able to see symbols in your main executable you _may_ need to also compile it with -export-dynamic or something like that. -- -Alfred Perlstein [alfred@freebsd.org] Instead of asking why a piece of software is using "1970s technology," start asking why software is ignoring 30 years of accumulated wisdom. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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