#endif
#include "qemu/queue.h"
#include "qemu/module.h"
+#include "qemu/cutils.h"
+#include "qemu/config-file.h"
#ifdef CONFIG_MODULE_UPGRADES
#include "qemu-version.h"
#endif
+#include "trace.h"
typedef struct ModuleEntry
{
}
#ifdef CONFIG_MODULES
-static int module_load_file(const char *fname)
+
+static const QemuModinfo module_info_stub[] = { {
+ /* end of list */
+} };
+static const QemuModinfo *module_info = module_info_stub;
+static const char *module_arch;
+
+void module_init_info(const QemuModinfo *info)
+{
+ module_info = info;
+}
+
+void module_allow_arch(const char *arch)
+{
+ module_arch = arch;
+}
+
+static bool module_check_arch(const QemuModinfo *modinfo)
+{
+ if (modinfo->arch) {
+ if (!module_arch) {
+ /* no arch set -> ignore all */
+ return false;
+ }
+ if (strcmp(module_arch, modinfo->arch) != 0) {
+ /* mismatch */
+ return false;
+ }
+ }
+ return true;
+}
+
+static int module_load_file(const char *fname, bool mayfail, bool export_symbols)
{
GModule *g_module;
void (*sym)(void);
- const char *dsosuf = HOST_DSOSUF;
+ const char *dsosuf = CONFIG_HOST_DSOSUF;
int len = strlen(fname);
int suf_len = strlen(dsosuf);
ModuleEntry *e, *next;
- int ret;
+ int ret, flags;
if (len <= suf_len || strcmp(&fname[len - suf_len], dsosuf)) {
/* wrong suffix */
assert(QTAILQ_EMPTY(&dso_init_list));
- g_module = g_module_open(fname, G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL);
+ flags = 0;
+ if (!export_symbols) {
+ flags |= G_MODULE_BIND_LOCAL;
+ }
+ g_module = g_module_open(fname, flags);
if (!g_module) {
- fprintf(stderr, "Failed to open module: %s\n",
- g_module_error());
+ if (!mayfail) {
+ fprintf(stderr, "Failed to open module: %s\n",
+ g_module_error());
+ }
ret = -EINVAL;
goto out;
}
ret = 0;
}
+ trace_module_load_module(fname);
QTAILQ_FOREACH_SAFE(e, &dso_init_list, node, next) {
QTAILQ_REMOVE(&dso_init_list, e, node);
g_free(e);
}
#endif
-bool module_load_one(const char *prefix, const char *lib_name)
+bool module_load_one(const char *prefix, const char *lib_name, bool mayfail)
{
bool success = false;
#ifdef CONFIG_MODULES
char *fname = NULL;
- char *exec_dir;
#ifdef CONFIG_MODULE_UPGRADES
char *version_dir;
#endif
char *module_name;
int i = 0, n_dirs = 0;
int ret;
+ bool export_symbols = false;
static GHashTable *loaded_modules;
+ const QemuModinfo *modinfo;
+ const char **sl;
if (!g_module_supported()) {
fprintf(stderr, "Module is not supported by system.\n");
module_name = g_strdup_printf("%s%s", prefix, lib_name);
- if (!g_hash_table_add(loaded_modules, module_name)) {
+ if (g_hash_table_contains(loaded_modules, module_name)) {
g_free(module_name);
return true;
}
+ g_hash_table_add(loaded_modules, module_name);
+
+ for (modinfo = module_info; modinfo->name != NULL; modinfo++) {
+ if (modinfo->arch) {
+ if (strcmp(modinfo->name, module_name) == 0) {
+ if (!module_check_arch(modinfo)) {
+ return false;
+ }
+ }
+ }
+ if (modinfo->deps) {
+ if (strcmp(modinfo->name, module_name) == 0) {
+ /* we depend on other module(s) */
+ for (sl = modinfo->deps; *sl != NULL; sl++) {
+ module_load_one("", *sl, false);
+ }
+ } else {
+ for (sl = modinfo->deps; *sl != NULL; sl++) {
+ if (strcmp(module_name, *sl) == 0) {
+ /* another module depends on us */
+ export_symbols = true;
+ }
+ }
+ }
+ }
+ }
- exec_dir = qemu_get_exec_dir();
search_dir = getenv("QEMU_MODULE_DIR");
if (search_dir != NULL) {
dirs[n_dirs++] = g_strdup_printf("%s", search_dir);
}
- dirs[n_dirs++] = g_strdup_printf("%s", CONFIG_QEMU_MODDIR);
- dirs[n_dirs++] = g_strdup_printf("%s/..", exec_dir ? : "");
- dirs[n_dirs++] = g_strdup_printf("%s", exec_dir ? : "");
+ dirs[n_dirs++] = get_relocated_path(CONFIG_QEMU_MODDIR);
+ dirs[n_dirs++] = g_strdup(qemu_get_exec_dir());
#ifdef CONFIG_MODULE_UPGRADES
version_dir = g_strcanon(g_strdup(QEMU_PKGVERSION),
assert(n_dirs <= ARRAY_SIZE(dirs));
- g_free(exec_dir);
- exec_dir = NULL;
-
for (i = 0; i < n_dirs; i++) {
fname = g_strdup_printf("%s/%s%s",
- dirs[i], module_name, HOST_DSOSUF);
- ret = module_load_file(fname);
+ dirs[i], module_name, CONFIG_HOST_DSOSUF);
+ ret = module_load_file(fname, mayfail, export_symbols);
g_free(fname);
fname = NULL;
/* Try loading until loaded a module file */
return success;
}
-/*
- * Building devices and other qom objects modular is mostly useful in
- * case they have dependencies to external shared libraries, so we can
- * cut down the core qemu library dependencies. Which is the case for
- * only a very few devices & objects.
- *
- * So with the expectation that this will be rather the exception than
- * to rule and the list will not gain that many entries go with a
- * simple manually maintained list for now.
- */
-static struct {
- const char *type;
- const char *prefix;
- const char *module;
-} const qom_modules[] = {
- { "ccid-card-passthru", "hw-", "usb-smartcard" },
- { "ccid-card-emulated", "hw-", "usb-smartcard" },
- { "usb-redir", "hw-", "usb-redirect" },
- { "qxl-vga", "hw-", "display-qxl" },
- { "qxl", "hw-", "display-qxl" },
- { "chardev-braille", "chardev-", "baum" },
-};
+#ifdef CONFIG_MODULES
static bool module_loaded_qom_all;
void module_load_qom_one(const char *type)
{
- int i;
+ const QemuModinfo *modinfo;
+ const char **sl;
if (!type) {
return;
}
- if (module_loaded_qom_all) {
- return;
- }
- for (i = 0; i < ARRAY_SIZE(qom_modules); i++) {
- if (strcmp(qom_modules[i].type, type) == 0) {
- module_load_one(qom_modules[i].prefix,
- qom_modules[i].module);
- return;
+
+ trace_module_lookup_object_type(type);
+ for (modinfo = module_info; modinfo->name != NULL; modinfo++) {
+ if (!modinfo->objs) {
+ continue;
+ }
+ if (!module_check_arch(modinfo)) {
+ continue;
+ }
+ for (sl = modinfo->objs; *sl != NULL; sl++) {
+ if (strcmp(type, *sl) == 0) {
+ module_load_one("", modinfo->name, false);
+ }
}
}
}
void module_load_qom_all(void)
{
- int i;
+ const QemuModinfo *modinfo;
if (module_loaded_qom_all) {
return;
}
- for (i = 0; i < ARRAY_SIZE(qom_modules); i++) {
- if (i > 0 && (strcmp(qom_modules[i - 1].module,
- qom_modules[i].module) == 0 &&
- strcmp(qom_modules[i - 1].prefix,
- qom_modules[i].prefix) == 0)) {
- /* one module implementing multiple types -> load only once */
+
+ for (modinfo = module_info; modinfo->name != NULL; modinfo++) {
+ if (!modinfo->objs) {
+ continue;
+ }
+ if (!module_check_arch(modinfo)) {
continue;
}
- module_load_one(qom_modules[i].prefix, qom_modules[i].module);
+ module_load_one("", modinfo->name, false);
}
module_loaded_qom_all = true;
}
+
+void qemu_load_module_for_opts(const char *group)
+{
+ const QemuModinfo *modinfo;
+ const char **sl;
+
+ for (modinfo = module_info; modinfo->name != NULL; modinfo++) {
+ if (!modinfo->opts) {
+ continue;
+ }
+ for (sl = modinfo->opts; *sl != NULL; sl++) {
+ if (strcmp(group, *sl) == 0) {
+ module_load_one("", modinfo->name, false);
+ }
+ }
+ }
+}
+
+#else
+
+void module_allow_arch(const char *arch) {}
+void qemu_load_module_for_opts(const char *group) {}
+void module_load_qom_one(const char *type) {}
+void module_load_qom_all(void) {}
+
+#endif
projects / qemu.git / blobdiff