WiiUPluginLoaderBackend/source/utils/function_patcher.h

/****************************************************************************
 * Copyright (C) 2016-2020 Maschell
 * With code from chadderz and dimok
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ****************************************************************************/

#ifndef _FUNCTION_HOOKS_H_
#define _FUNCTION_HOOKS_H_

#ifdef __cplusplus
extern "C" {
#endif

#include <coreinit/dynload.h>

/* Macros for libs */
#define LIB_CORE_INIT           0
#define LIB_NSYSNET             1
#define LIB_GX2                 2
#define LIB_AOC                 3
#define LIB_AX                  4
#define LIB_FS                  5
#define LIB_OS                  6
#define LIB_PADSCORE            7
#define LIB_SOCKET              8
#define LIB_SYS                 9
#define LIB_VPAD                10
#define LIB_NN_ACP              11
#define LIB_SYSHID              12
#define LIB_VPADBASE            13
#define LIB_AX_OLD              14
#define LIB_PROC_UI             15
#define LIB_NTAG                16
#define LIB_NFP                 17
#define LIB_SAVE                18
#define LIB_ACT                 19
#define LIB_NIM                 20

// functions types
#define STATIC_FUNCTION         0
#define DYNAMIC_FUNCTION        1

//Orignal code by Chadderz.
#define DECL(res, name, ...) \
        res (* real_ ## name)(__VA_ARGS__) __attribute__((section(".data"))); \
        res my_ ## name(__VA_ARGS__)

#define FUNCTION_PATCHER_METHOD_STORE_SIZE  7

typedef struct {
    const uint32_t replaceAddr;
    const uint32_t replaceCall;
    const uint32_t library;
    const char functionName[50];
    uint32_t realAddr;
    uint32_t restoreInstruction;
    uint8_t functionType;
    uint8_t alreadyPatched;
} hooks_magic_t;

void PatchInvidualMethodHooks(hooks_magic_t hook_information[], int32_t hook_information_size, volatile uint32_t dynamic_method_calls[]);
void RestoreInvidualInstructions(hooks_magic_t hook_information[], int32_t hook_information_size);
uint32_t GetAddressOfFunction(const char *functionName, uint32_t library);
int32_t isDynamicFunction(uint32_t physicalAddress);
void resetLibs();

//Orignal code by Chadderz.
#define MAKE_MAGIC(x, lib, functionType) { (uint32_t) my_ ## x, (uint32_t) &real_ ## x, lib, # x,0,0,functionType,0}
#define MAKE_MAGIC_NAME(x, y, lib, functionType) { (uint32_t) my_ ## x, (uint32_t) &real_ ## x, lib, # y,0,0,functionType,0}

#ifdef __cplusplus
}
#endif

#endif /* _FS_H */