site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com void *mainHandle = dlopen(NULL, RTLD_LAZY); if( !mainHandle ) { printf("dlopen() failed.\n"); } int *debug_addr = (int *)dlsym(mainHandle, "__debug_level"); printf("debug_addr = 0x%x->0x%x\n", debug_addr, *debug_addr); dlclose(mainHandle); -- Damien Sorresso Macintosh Developer Computer Infrastructure Support Services Illinois State University damien.sorresso@ilstu.edu I've got a loadable bundle in a Cocoa application, and I'd like this bundle to grab the value of a global symbol from the main application after it's been loaded, specifically a global debugging level. Now, I can grab the symbol's address using nlist(...), but I want to in turn take this address and find the location of the variable in memory at runtime. I've already tried CFBundleGetDataPointerForName (...); it doesn't work. Don't ask me why. I've been pouring over the Mach-O documentation, and I'm thinking that the best way to go about it would be to grab the `vmaddr' member of the `segment_command' structure to determine the VM address of the __DATA segment and then work from there, but I'm not sure how to specifically go about doing this. Use dlopen/dlsym, see the manpages. _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... This email sent to site_archiver@lists.apple.com dlsym(...) gives me the information I already have: the symbol address in the Mach-O file. I need the address of the variable the symbol corresponds to at runtime. Or am I doing something wrong here? This is what I'm doing. On 11 Jul, 2006, at 10:52 AM, Peter O'Gorman wrote: On Tue, 2006-07-11 at 10:34 -0500, Damien Sorresso wrote: Peter smime.p7s PGP.sig