diff options
Diffstat (limited to 'qemu/util/module.c')
| -rw-r--r-- | qemu/util/module.c | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/qemu/util/module.c b/qemu/util/module.c deleted file mode 100644 index ce058aef6..000000000 --- a/qemu/util/module.c +++ /dev/null @@ -1,219 +0,0 @@ -/* - * QEMU Module Infrastructure - * - * Copyright IBM, Corp. 2009 - * - * Authors: - * Anthony Liguori <aliguori@us.ibm.com> - * - * This work is licensed under the terms of the GNU GPL, version 2. See - * the COPYING file in the top-level directory. - * - * Contributions after 2012-01-13 are licensed under the terms of the - * GNU GPL, version 2 or (at your option) any later version. - */ - -#include "qemu/osdep.h" -#include "qemu-common.h" -#ifdef CONFIG_MODULES -#include <gmodule.h> -#endif -#include "qemu/queue.h" -#include "qemu/module.h" - -typedef struct ModuleEntry -{ - void (*init)(void); - QTAILQ_ENTRY(ModuleEntry) node; - module_init_type type; -} ModuleEntry; - -typedef QTAILQ_HEAD(, ModuleEntry) ModuleTypeList; - -static ModuleTypeList init_type_list[MODULE_INIT_MAX]; - -static ModuleTypeList dso_init_list; - -static void init_lists(void) -{ - static int inited; - int i; - - if (inited) { - return; - } - - for (i = 0; i < MODULE_INIT_MAX; i++) { - QTAILQ_INIT(&init_type_list[i]); - } - - QTAILQ_INIT(&dso_init_list); - - inited = 1; -} - - -static ModuleTypeList *find_type(module_init_type type) -{ - ModuleTypeList *l; - - init_lists(); - - l = &init_type_list[type]; - - return l; -} - -void register_module_init(void (*fn)(void), module_init_type type) -{ - ModuleEntry *e; - ModuleTypeList *l; - - e = g_malloc0(sizeof(*e)); - e->init = fn; - e->type = type; - - l = find_type(type); - - QTAILQ_INSERT_TAIL(l, e, node); -} - -void register_dso_module_init(void (*fn)(void), module_init_type type) -{ - ModuleEntry *e; - - init_lists(); - - e = g_malloc0(sizeof(*e)); - e->init = fn; - e->type = type; - - QTAILQ_INSERT_TAIL(&dso_init_list, e, node); -} - -static void module_load(module_init_type type); - -void module_call_init(module_init_type type) -{ - ModuleTypeList *l; - ModuleEntry *e; - - module_load(type); - l = find_type(type); - - QTAILQ_FOREACH(e, l, node) { - e->init(); - } -} - -#ifdef CONFIG_MODULES -static int module_load_file(const char *fname) -{ - GModule *g_module; - void (*sym)(void); - const char *dsosuf = HOST_DSOSUF; - int len = strlen(fname); - int suf_len = strlen(dsosuf); - ModuleEntry *e, *next; - int ret; - - if (len <= suf_len || strcmp(&fname[len - suf_len], dsosuf)) { - /* wrong suffix */ - ret = -EINVAL; - goto out; - } - if (access(fname, F_OK)) { - ret = -ENOENT; - goto out; - } - - assert(QTAILQ_EMPTY(&dso_init_list)); - - g_module = g_module_open(fname, G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL); - if (!g_module) { - fprintf(stderr, "Failed to open module: %s\n", - g_module_error()); - ret = -EINVAL; - goto out; - } - if (!g_module_symbol(g_module, DSO_STAMP_FUN_STR, (gpointer *)&sym)) { - fprintf(stderr, "Failed to initialize module: %s\n", - fname); - /* Print some info if this is a QEMU module (but from different build), - * this will make debugging user problems easier. */ - if (g_module_symbol(g_module, "qemu_module_dummy", (gpointer *)&sym)) { - fprintf(stderr, - "Note: only modules from the same build can be loaded.\n"); - } - g_module_close(g_module); - ret = -EINVAL; - } else { - QTAILQ_FOREACH(e, &dso_init_list, node) { - register_module_init(e->init, e->type); - } - ret = 0; - } - - QTAILQ_FOREACH_SAFE(e, &dso_init_list, node, next) { - QTAILQ_REMOVE(&dso_init_list, e, node); - g_free(e); - } -out: - return ret; -} -#endif - -static void module_load(module_init_type type) -{ -#ifdef CONFIG_MODULES - char *fname = NULL; - const char **mp; - static const char *block_modules[] = { - CONFIG_BLOCK_MODULES - }; - char *exec_dir; - char *dirs[3]; - int i = 0; - int ret; - - if (!g_module_supported()) { - fprintf(stderr, "Module is not supported by system.\n"); - return; - } - - switch (type) { - case MODULE_INIT_BLOCK: - mp = block_modules; - break; - default: - /* no other types have dynamic modules for now*/ - return; - } - - exec_dir = qemu_get_exec_dir(); - dirs[i++] = g_strdup_printf("%s", CONFIG_QEMU_MODDIR); - dirs[i++] = g_strdup_printf("%s/..", exec_dir ? : ""); - dirs[i++] = g_strdup_printf("%s", exec_dir ? : ""); - assert(i == ARRAY_SIZE(dirs)); - g_free(exec_dir); - exec_dir = NULL; - - for ( ; *mp; mp++) { - for (i = 0; i < ARRAY_SIZE(dirs); i++) { - fname = g_strdup_printf("%s/%s%s", dirs[i], *mp, HOST_DSOSUF); - ret = module_load_file(fname); - g_free(fname); - fname = NULL; - /* Try loading until loaded a module file */ - if (!ret) { - break; - } - } - } - - for (i = 0; i < ARRAY_SIZE(dirs); i++) { - g_free(dirs[i]); - } - -#endif -} |