WiiUModuleSystem/include/wums/hooks.h

/* based on blsug.h
 *   by Alex Chadwick
 *
 * Copyright (C) 2014, Alex Chadwick
 * Modified by Maschell, 2018-2021
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#pragma once

#include "common.h"
#include "defines/module_defines.h"

#ifdef __cplusplus
extern "C" {
#endif

#define WUMS_HOOK_EX(type_def, original_func) \
    extern const wums_hook_t wums_hooks_ ## original_func WUMS_SECTION("hooks"); \
    const wums_hook_t wums_hooks_ ## original_func = { \
        .type = type_def, \
        .target = (const void*)&(original_func) \
    }

typedef enum wums_hook_type_t {
    WUMS_HOOK_INIT_WUT_MALLOC,
    WUMS_HOOK_FINI_WUT_MALLOC,
    WUMS_HOOK_INIT_WUT_NEWLIB,
    WUMS_HOOK_FINI_WUT_NEWLIB,
    WUMS_HOOK_INIT_WUT_STDCPP,
    WUMS_HOOK_FINI_WUT_STDCPP,
    WUMS_HOOK_INIT_WUT_DEVOPTAB,
    WUMS_HOOK_FINI_WUT_DEVOPTAB,
    WUMS_HOOK_INIT_WUT_SOCKETS,
    WUMS_HOOK_FINI_WUT_SOCKETS,

    WUMS_HOOK_INIT,
    WUMS_HOOK_APPLICATION_STARTS,
    WUMS_HOOK_APPLICATION_ENDS,
    WUMS_HOOK_RELOCATIONS_DONE,
    WUMS_HOOK_APPLICATION_REQUESTS_EXIT,
} wums_hook_type_t;

typedef struct wums_hook_t {
    wums_hook_type_t type;          /*  Defines the type of the hook */
    const void *target;             /*  Address of our own, new function */
} wums_hook_t;

typedef struct wums_app_init_args_t {
    module_information_t *module_information;
} wums_app_init_args_t;

typedef struct wums_relocs_done_args_t {
    module_information_t *module_information;
} wums_relocs_done_args_t;

#define WUMS_INITIALIZE(myargs) \
    void __wums__init(wums_app_init_args_t);\
    WUMS_HOOK_EX(WUMS_HOOK_INIT, __wums__init); \
    void __wums__init(wums_app_init_args_t myargs)

#define WUMS_APPLICATION_STARTS() \
    void __wums_start(void);\
    WUMS_HOOK_EX(WUMS_HOOK_APPLICATION_STARTS, __wums_start); \
    void __wums_start()

#define WUMS_APPLICATION_ENDS() \
    void __wums_end(void);\
    WUMS_HOOK_EX(WUMS_HOOK_APPLICATION_ENDS, __wums_end); \
    void __wums_end()

#define WUMS_APPLICATION_REQUESTS_EXIT() \
    void __wums_requests_exit(void);\
    WUMS_HOOK_EX(WUMS_HOOK_APPLICATION_REQUESTS_EXIT, __wums_requests_exit); \
    void __wums_requests_exit()

#define WUMS_RELOCATIONS_DONE(myargs) \
    void __wums_relocations_done(wums_relocs_done_args_t);\
    WUMS_HOOK_EX(WUMS_HOOK_RELOCATIONS_DONE, __wums_relocations_done); \
    void __wums_relocations_done(wums_relocs_done_args_t myargs)

#ifdef __cplusplus
#define __EXTERN_C_MACRO extern "C" 
#else
#define __EXTERN_C_MACRO
#endif

#define WUMS_USE_WUT_MALLOC() \
    __EXTERN_C_MACRO void __init_wut_malloc(); \
    void on_init_wut_malloc(){ \
        __init_wut_malloc(); \
    }\
    WUMS_HOOK_EX(WUMS_HOOK_INIT_WUT_MALLOC,on_init_wut_malloc); \
    __EXTERN_C_MACRO void __fini_wut_malloc(); \
    void on_fini_wut_malloc(){ \
        __fini_wut_malloc(); \
    } \
    WUMS_HOOK_EX(WUMS_HOOK_FINI_WUT_MALLOC,on_fini_wut_malloc)

#define WUMS_USE_WUT_DEVOPTAB() \
    __EXTERN_C_MACRO void __init_wut_devoptab(); \
    void on_init_wut_devoptab(){ \
        __init_wut_devoptab(); \
    }\
    WUMS_HOOK_EX(WUMS_HOOK_INIT_WUT_DEVOPTAB,on_init_wut_devoptab); \
    __EXTERN_C_MACRO void __fini_wut_devoptab(); \
    void on_fini_wut_devoptab(){ \
        __fini_wut_devoptab(); \
    }\
    WUMS_HOOK_EX(WUMS_HOOK_FINI_WUT_DEVOPTAB,on_fini_wut_devoptab)

#define WUMS_USE_WUT_NEWLIB() \
    __EXTERN_C_MACRO void __init_wut_newlib(); \
    void on_init_wut_newlib(){ \
        __init_wut_newlib(); \
    }\
    WUMS_HOOK_EX(WUMS_HOOK_INIT_WUT_NEWLIB,on_init_wut_newlib); \
    __EXTERN_C_MACRO void __fini_wut_newlib(); \
    void on_fini_wut_newlib(){ \
        __fini_wut_newlib(); \
    }\
    WUMS_HOOK_EX(WUMS_HOOK_FINI_WUT_NEWLIB,on_fini_wut_newlib)

#define WUMS_USE_WUT_STDCPP() \
    __EXTERN_C_MACRO void __init_wut_stdcpp(); \
    void on_init_wut_stdcpp(){ \
        __init_wut_stdcpp(); \
    }\
    WUMS_HOOK_EX(WUMS_HOOK_INIT_WUT_STDCPP,on_init_wut_stdcpp); \
    __EXTERN_C_MACRO  void __fini_wut_stdcpp(); \
    void on_fini_wut_stdcpp(){ \
        __fini_wut_stdcpp(); \
    }\
    WUMS_HOOK_EX(WUMS_HOOK_FINI_WUT_STDCPP,on_fini_wut_stdcpp)

#define WUMS_USE_WUT_SOCKETS() \
    __EXTERN_C_MACRO void __init_wut_socket(); \
    WUMS_HOOK_EX(WUMS_HOOK_INIT_WUT_SOCKETS,__init_wut_socket); \
    __EXTERN_C_MACRO void __fini_wut_socket(); \
    WUMS_HOOK_EX(WUMS_HOOK_FINI_WUT_SOCKETS,__fini_wut_socket)

#ifdef __cplusplus
}
#endif