1/*
2 * QEMU Module Infrastructure
3 *
4 * Copyright IBM, Corp. 2009
5 *
6 * Authors:
7 * Anthony Liguori <aliguori@us.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
11 *
12 */
13
14#ifndef QEMU_MODULE_H
15#define QEMU_MODULE_H
16
17
18#define DSO_STAMP_FUN glue(qemu_stamp, CONFIG_STAMP)
19#define DSO_STAMP_FUN_STR stringify(DSO_STAMP_FUN)
20
21#ifdef BUILD_DSO
22void DSO_STAMP_FUN(void);
23/* This is a dummy symbol to identify a loaded DSO as a QEMU module, so we can
24 * distinguish "version mismatch" from "not a QEMU module", when the stamp
25 * check fails during module loading */
26void qemu_module_dummy(void);
27
28#define module_init(function, type) \
29static void __attribute__((constructor)) do_qemu_init_ ## function(void) \
30{ \
31 register_dso_module_init(function, type); \
32}
33#else
34/* This should not be used directly. Use block_init etc. instead. */
35#define module_init(function, type) \
36static void __attribute__((constructor)) do_qemu_init_ ## function(void) \
37{ \
38 register_module_init(function, type); \
39}
40#endif
41
42typedef enum {
43 MODULE_INIT_BLOCK,
44 MODULE_INIT_OPTS,
45 MODULE_INIT_QOM,
46 MODULE_INIT_TRACE,
47 MODULE_INIT_XEN_BACKEND,
48 MODULE_INIT_LIBQOS,
49 MODULE_INIT_MAX
50} module_init_type;
51
52#define block_init(function) module_init(function, MODULE_INIT_BLOCK)
53#define opts_init(function) module_init(function, MODULE_INIT_OPTS)
54#define type_init(function) module_init(function, MODULE_INIT_QOM)
55#define trace_init(function) module_init(function, MODULE_INIT_TRACE)
56#define xen_backend_init(function) module_init(function, \
57 MODULE_INIT_XEN_BACKEND)
58#define libqos_init(function) module_init(function, MODULE_INIT_LIBQOS)
59
60#define block_module_load_one(lib) module_load_one("block-", lib)
61#define ui_module_load_one(lib) module_load_one("ui-", lib)
62#define audio_module_load_one(lib) module_load_one("audio-", lib)
63
64void register_module_init(void (*fn)(void), module_init_type type);
65void register_dso_module_init(void (*fn)(void), module_init_type type);
66
67void module_call_init(module_init_type type);
68bool module_load_one(const char *prefix, const char *lib_name);
69
70#endif
71