void *dlopen(char *filename, int unused)
{
NSObjectFileImage myImage;
NSModule myModule;
if (firstLoad)
{
/* If we are loading our first symbol (huzzah!) we should go ahead
* and install link editor error handling!
*/
NSLinkEditErrorHandlers linkEditorErrorHandlers;
linkEditorErrorHandlers.undefined = undefinedErrorHandler;
linkEditorErrorHandlers.multiple = multipleErrorHandler;
linkEditorErrorHandlers.linkEdit = linkEditErrorHandler;
NSInstallLinkEditErrorHandlers(&linkEditorErrorHandlers);
firstLoad = FALSE;
}
myDlError = NSCreateObjectFileImageFromFile(filename, &myImage);
if (myDlError != NSObjectFileImageSuccess)
return(NULL);
myModule = NSLinkModule(myImage, filename, NSLINKMODULE_OPTION_PRIVATE);
return((void *)myModule);
}
/* ggDarwinDLOpen implements a "dlopen" wrapper
*/
gg_dlhand ggDarwinDLOpen(const char *filename, int flags)
{
gg_dlhand ret = NULL;
struct gg_dlhand_darwin_t *darwin_ret = NULL;
NSLinkEditErrorHandlers error_handlers;
const char *pathname, *modulename;
darwin_ret = (struct gg_dlhand_darwin_t *)malloc(sizeof(struct gg_dlhand_darwin_t));
if (darwin_ret == NULL) return ret;
ret = (void *)darwin_ret;
if (flags & GG_MODULE_GLOBAL) {
darwin_ret->nsmodule_flags = NSLINKMODULE_OPTION_NONE;
} else {
darwin_ret->nsmodule_flags = NSLINKMODULE_OPTION_PRIVATE;
} /* if */
splitstring(filename, &pathname, &modulename);
dlerror_code = NSCreateObjectFileImageFromFile(pathname, &darwin_ret->objectFileImage);
ggstrlcpy(dlerror_filename, filename, sizeof(dlerror_filename));
switch (dlerror_code) {
case NSObjectFileImageSuccess:
break;
case NSObjectFileImageFailure:
case NSObjectFileImageInappropriateFile:
case NSObjectFileImageArch:
case NSObjectFileImageFormat:
case NSObjectFileImageAccess:
goto err0;
} /* switch */
/* Install our own error handlers */
error_handlers.undefined = ggDarwinErrorUndefined;
error_handlers.multiple = ggDarwinErrorMultiple;
error_handlers.linkEdit = ggDarwinErrorLinkEdit;
#if 0
/* Let the default handlers do their work
* as long as our own error handlers are stubs.
*/
NSInstallLinkEditErrorHandlers(&error_handlers);
#endif
/* try to load the module now */
darwin_ret->nsmodule = NSLinkModule(darwin_ret->objectFileImage,
modulename, darwin_ret->nsmodule_flags);
/* Either we return successful here or the error handlers
* already aborted/exited the app before.
*/
return ret;
err0:
free(ret);
return NULL;
} /* ggDarwinDLOpen */
/* Initialize all DSO stuff */
bool dso_init()
{
NSLinkEditErrorHandlers h;
h.undefined = nosymbol;
h.multiple = multiple;
h.linkEdit = linkedit;
NSInstallLinkEditErrorHandlers(&h);
return (true);
}
static void dlinit(void)
{
NSInstallLinkEditErrorHandlers(&errorHandlers);
}
