int mod_registry_foreach(mod_callback_t callback, FAR void *arg)
{
FAR struct module_s *modp;
int ret;
/* Get exclusive access to the module registry */
mod_registry_lock();
/* Visit each installed module */
for (modp = g_mod_registry; modp != NULL; modp = modp->flink)
{
/* Perform the callback */
ret = callback(modp, arg);
if (ret != 0)
{
return ret;
}
}
mod_registry_unlock();
return OK;
}
int insmod(FAR const char *filename, FAR const char *modulename)
{
struct mod_loadinfo_s loadinfo;
FAR struct module_s *modp;
mod_initializer_t initializer;
int ret;
DEBUGASSERT(filename != NULL && modulename != NULL);
sinfo("Loading file: %s\n", filename);
/* Get exclusive access to the module registry */
mod_registry_lock();
/* Check if this module is already installed */
if (mod_registry_find(modulename) != NULL)
{
mod_registry_unlock();
ret = -EEXIST;
goto errout_with_lock;
}
/* Initialize the ELF library to load the program binary. */
ret = mod_initialize(filename, &loadinfo);
mod_dumploadinfo(&loadinfo);
if (ret != 0)
{
serr("ERROR: Failed to initialize to load module: %d\n", ret);
goto errout_with_lock;
}
/* Allocate a module registry entry to hold the module data */
modp = (FAR struct module_s *)kmm_zalloc(sizeof(struct module_s));
if (ret != 0)
{
sinfo("Failed to initialize for load of ELF program: %d\n", ret);
goto errout_with_loadinfo;
}
/* Save the module name in the registry entry */
strncpy(modp->modulename, modulename, MODULENAME_MAX);
/* Load the program binary */
ret = mod_load(&loadinfo);
mod_dumploadinfo(&loadinfo);
if (ret != 0)
{
sinfo("Failed to load ELF program binary: %d\n", ret);
goto errout_with_registry_entry;
}
/* Bind the program to the kernel symbol table */
ret = mod_bind(&loadinfo);
if (ret != 0)
{
sinfo("Failed to bind symbols program binary: %d\n", ret);
goto errout_with_load;
}
/* Return the load information */
modp->alloc = (FAR void *)loadinfo.textalloc;
#if defined(CONFIG_FS_PROCFS) && !defined(CONFIG_FS_PROCFS_EXCLUDE_MODULE)
modp->textsize = loadinfo.textsize;
modp->datasize = loadinfo.datasize;
#endif
/* Get the module initializer entry point */
initializer = (mod_initializer_t)(loadinfo.textalloc + loadinfo.ehdr.e_entry);
#if defined(CONFIG_FS_PROCFS) && !defined(CONFIG_FS_PROCFS_EXCLUDE_MODULE)
modp->initializer = initializer;
#endif
mod_dumpinitializer(initializer, &loadinfo);
/* Call the module initializer */
ret = initializer(&modp->uninitializer, &modp->arg);
if (ret < 0)
{
sinfo("Failed to initialize the module: %d\n", ret);
goto errout_with_load;
}
/* Add the new module entry to the registry */
mod_registry_add(modp);
mod_uninitialize(&loadinfo);
mod_registry_unlock();
return OK;
errout_with_load:
mod_unload(&loadinfo);
errout_with_registry_entry:
kmm_free(modp);
errout_with_loadinfo:
mod_uninitialize(&loadinfo);
errout_with_lock:
mod_registry_unlock();
set_errno(-ret);
return ERROR;
}
