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 22 void 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 */ 26 void qemu_module_dummy(void); 27 28 #define module_init(function, type) \ 29 static 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) \ 36 static void __attribute__((constructor)) do_qemu_init_ ## function(void) \ 37 { \ 38 register_module_init(function, type); \ 39 } 40 #endif 41 42 typedef enum { 43 MODULE_INIT_MIGRATION, 44 MODULE_INIT_BLOCK, 45 MODULE_INIT_OPTS, 46 MODULE_INIT_QOM, 47 MODULE_INIT_TRACE, 48 MODULE_INIT_XEN_BACKEND, 49 MODULE_INIT_LIBQOS, 50 MODULE_INIT_FUZZ_TARGET, 51 MODULE_INIT_MAX 52 } module_init_type; 53 54 #define block_init(function) module_init(function, MODULE_INIT_BLOCK) 55 #define opts_init(function) module_init(function, MODULE_INIT_OPTS) 56 #define type_init(function) module_init(function, MODULE_INIT_QOM) 57 #define trace_init(function) module_init(function, MODULE_INIT_TRACE) 58 #define xen_backend_init(function) module_init(function, \ 59 MODULE_INIT_XEN_BACKEND) 60 #define libqos_init(function) module_init(function, MODULE_INIT_LIBQOS) 61 #define fuzz_target_init(function) module_init(function, \ 62 MODULE_INIT_FUZZ_TARGET) 63 #define migration_init(function) module_init(function, MODULE_INIT_MIGRATION) 64 #define block_module_load_one(lib) module_load_one("block-", lib, false) 65 #define ui_module_load_one(lib) module_load_one("ui-", lib, false) 66 #define audio_module_load_one(lib) module_load_one("audio-", lib, false) 67 68 void register_module_init(void (*fn)(void), module_init_type type); 69 void register_dso_module_init(void (*fn)(void), module_init_type type); 70 71 void module_call_init(module_init_type type); 72 bool module_load_one(const char *prefix, const char *lib_name, bool mayfail); 73 void module_load_qom_one(const char *type); 74 void module_load_qom_all(void); 75 76 #endif 77