WiiUPluginLoaderBackend/source/utils/function_patcher_.cpp

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/****************************************************************************
* Copyright (C) 2016 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/>.
****************************************************************************/
#include <vector>
#include <algorithm>
#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <coreinit/memorymap.h>
#include <coreinit/cache.h>
#include <coreinit/dynload.h>
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#include "kernel/kernel_utils.h"
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#include "function_patcher.h"
#include "logger.h"
#define LIB_CODE_RW_BASE_OFFSET 0xC1000000
#define CODE_RW_BASE_OFFSET 0x00000000
#define DEBUG_LOG_DYN 0
OSDynLoad_Module acp_handle_internal = 0;
OSDynLoad_Module aoc_handle_internal = 0;
OSDynLoad_Module sound_handle_internal = 0;
OSDynLoad_Module sound_handle_internal_old = 0;
OSDynLoad_Module libcurl_handle_internal = 0;
OSDynLoad_Module gx2_handle_internal = 0;
OSDynLoad_Module nfp_handle_internal = 0;
OSDynLoad_Module nn_act_handle_internal = 0;
OSDynLoad_Module nn_nim_handle_internal = 0;
OSDynLoad_Module nn_save_handle_internal = 0;
OSDynLoad_Module ntag_handle_internal = 0;
OSDynLoad_Module coreinit_handle_internal = 0;
OSDynLoad_Module padscore_handle_internal = 0;
OSDynLoad_Module proc_ui_handle_internal = 0;
OSDynLoad_Module nsysnet_handle_internal = 0;
OSDynLoad_Module sysapp_handle_internal = 0;
OSDynLoad_Module syshid_handle_internal = 0;
OSDynLoad_Module vpad_handle_internal = 0;
OSDynLoad_Module vpadbase_handle_internal = 0;
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/*
* Patches a function that is loaded at the start of each application. Its not required to restore, at least when they are really dynamic.
* "normal" functions should be patch with the normal patcher. Current Code by Maschell with the help of dimok. Orignal code by Chadderz.
*/
void PatchInvidualMethodHooks(hooks_magic_t method_hooks[],int32_t hook_information_size, volatile uint32_t dynamic_method_calls[]) {
resetLibs();
DEBUG_FUNCTION_LINE("Patching %d given functions",hook_information_size);
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/* Patch branches to it. */
volatile uint32_t *space = &dynamic_method_calls[0];
int32_t method_hooks_count = hook_information_size;
uint32_t skip_instr = 1;
uint32_t my_instr_len = 6;
uint32_t instr_len = my_instr_len + skip_instr;
uint32_t flush_len = 4*instr_len;
for(int32_t i = 0; i < method_hooks_count; i++) {
log_printf("Patching %s ...",method_hooks[i].functionName);
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if(method_hooks[i].functionType == STATIC_FUNCTION && method_hooks[i].alreadyPatched == 1) {
if(isDynamicFunction((uint32_t)OSEffectiveToPhysical(method_hooks[i].realAddr))) {
log_printf("The function %s is a dynamic function. Please fix that <3", method_hooks[i].functionName);
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method_hooks[i].functionType = DYNAMIC_FUNCTION;
} else {
log_printf("Skipping %s, its already patched", method_hooks[i].functionName);
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space += instr_len;
continue;
}
}
uint32_t physical = 0;
uint32_t repl_addr = (uint32_t)method_hooks[i].replaceAddr;
uint32_t call_addr = (uint32_t)method_hooks[i].replaceCall;
uint32_t real_addr = GetAddressOfFunction(method_hooks[i].functionName,method_hooks[i].library);
if(!real_addr) {
log_printf("");
DEBUG_FUNCTION_LINE("OSDynLoad_FindExport failed for %s", method_hooks[i].functionName);
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space += instr_len;
continue;
}
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("%s is located at %08X!", method_hooks[i].functionName,real_addr);
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}
physical = (uint32_t)OSEffectiveToPhysical(real_addr);
if(!physical) {
log_printf("Error. Something is wrong with the physical address");
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space += instr_len;
continue;
}
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("%s physical is located at %08X!", method_hooks[i].functionName,physical);
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}
*(volatile uint32_t *)(call_addr) = (uint32_t)(space) - CODE_RW_BASE_OFFSET;
uint32_t targetAddr = (uint32_t)space;
if(targetAddr < 0x00800000 || targetAddr >= 0x01000000) {
targetAddr = (uint32_t) OSEffectiveToPhysical(targetAddr);
} else {
targetAddr = targetAddr + 0x30800000 - 0x00800000;
}
KernelCopyData(targetAddr, physical, 4);
ICInvalidateRange((void*)(space), 4);
DCFlushRange((void*)(space), 4);
space++;
//Only works if skip_instr == 1
if(skip_instr == 1) {
// fill the restore instruction section
method_hooks[i].realAddr = real_addr;
method_hooks[i].restoreInstruction = *(space-1);
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("method_hooks[i].realAddr = %08X!", method_hooks[i].realAddr);
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}
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("method_hooks[i].restoreInstruction = %08X!",method_hooks[i].restoreInstruction) ;
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}
} else {
log_printf("Error. Can't save %s for restoring!", method_hooks[i].functionName);
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}
//adding jump to real function thx @ dimok for the assembler code
/*
90 61 ff e0 stw r3,-32(r1)
3c 60 12 34 lis r3,4660
60 63 56 78 ori r3,r3,22136
7c 69 03 a6 mtctr r3
80 61 ff e0 lwz r3,-32(r1)
4e 80 04 20 bctr*/
*space = 0x9061FFE0;
space++;
*space = 0x3C600000 | (((real_addr + (skip_instr * 4)) >> 16) & 0x0000FFFF); // lis r3, real_addr@h
space++;
*space = 0x60630000 | ((real_addr + (skip_instr * 4)) & 0x0000ffff); // ori r3, r3, real_addr@l
space++;
*space = 0x7C6903A6; // mtctr r3
space++;
*space = 0x8061FFE0; // lwz r3,-32(r1)
space++;
*space = 0x4E800420; // bctr
space++;
DCFlushRange((void*)(space - instr_len), flush_len);
ICInvalidateRange((unsigned char*)(space - instr_len), flush_len);
//setting jump back
uint32_t replace_instr = 0x48000002 | (repl_addr & 0x03fffffc);
DCFlushRange(&replace_instr, 4);
KernelCopyData(physical, (uint32_t)OSEffectiveToPhysical((uint32_t)&replace_instr), 4);
ICInvalidateRange((void*)(real_addr), 4);
method_hooks[i].alreadyPatched = 1;
log_printf("done!\n");
}
DEBUG_FUNCTION_LINE("Done with patching given functions!");
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}
/* ****************************************************************** */
/* RESTORE ORIGINAL INSTRUCTIONS */
/* ****************************************************************** */
void RestoreInvidualInstructions(hooks_magic_t method_hooks[],int32_t hook_information_size) {
resetLibs();
DEBUG_FUNCTION_LINE("Restoring given functions!");
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int32_t method_hooks_count = hook_information_size;
for(int32_t i = 0; i < method_hooks_count; i++) {
DEBUG_FUNCTION_LINE("Restoring %s... ",method_hooks[i].functionName);
if(method_hooks[i].restoreInstruction == 0 || method_hooks[i].realAddr == 0) {
log_printf("I dont have the information for the restore =( skip");
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continue;
}
uint32_t real_addr = GetAddressOfFunction(method_hooks[i].functionName,method_hooks[i].library);
if(!real_addr) {
log_printf("OSDynLoad_FindExport failed for %s", method_hooks[i].functionName);
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continue;
}
uint32_t physical = (uint32_t)OSEffectiveToPhysical(real_addr);
if(!physical) {
log_printf("Something is wrong with the physical address");
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continue;
}
if(isDynamicFunction(physical)) {
log_printf("Its a dynamic function. We don't need to restore it!",method_hooks[i].functionName);
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} else {
physical = (uint32_t)OSEffectiveToPhysical(method_hooks[i].realAddr); //When its an static function, we need to use the old location
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("Restoring %08X to %08X",(uint32_t)method_hooks[i].restoreInstruction,physical);
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}
uint32_t targetAddr = (uint32_t)&method_hooks[i].restoreInstruction;
if(targetAddr < 0x00800000 || targetAddr >= 0x01000000) {
targetAddr = (uint32_t) OSEffectiveToPhysical(targetAddr);
} else {
targetAddr = targetAddr + 0x30800000 - 0x00800000;
}
KernelCopyData(physical,targetAddr, 4);
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("ICInvalidateRange %08X",(void*)method_hooks[i].realAddr);
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}
ICInvalidateRange((void*)method_hooks[i].realAddr, 4);
log_printf("done");
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}
method_hooks[i].alreadyPatched = 0; // In case a
}
DEBUG_FUNCTION_LINE("Done with restoring given functions!");
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}
int32_t isDynamicFunction(uint32_t physicalAddress) {
if((physicalAddress & 0x80000000) == 0x80000000) {
return 1;
}
return 0;
}
uint32_t GetAddressOfFunction(const char * functionName,uint32_t library) {
uint32_t real_addr = 0;
/*
if(strcmp(functionName, "OSDynLoad_Acquire") == 0) {
memcpy(&real_addr, &OSDynLoad_Acquire, 4);
return real_addr;
} else if(strcmp(functionName, "LiWaitOneChunk") == 0) {
real_addr = (uint32_t)addr_LiWaitOneChunk;
return real_addr;
} else if(strcmp(functionName, "LiBounceOneChunk") == 0) {
//! not required on firmwares above 3.1.0
if(OS_FIRMWARE >= 400)
return 0;
uint32_t addr_LiBounceOneChunk = 0x010003A0;
real_addr = (uint32_t)addr_LiBounceOneChunk;
return real_addr;
}
*/
OSDynLoad_Module rpl_handle = 0;
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if(library == LIB_CORE_INIT) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_CORE_INIT", functionName);
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}
if(coreinit_handle_internal == 0) {
OSDynLoad_Acquire("coreinit.rpl", &coreinit_handle_internal);
}
if(coreinit_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_CORE_INIT failed to acquire");
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return 0;
}
rpl_handle = coreinit_handle_internal;
} else if(library == LIB_NSYSNET) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_NSYSNET", functionName);
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}
if(nsysnet_handle_internal == 0) {
OSDynLoad_Acquire("nsysnet.rpl", &nsysnet_handle_internal);
}
if(nsysnet_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_NSYSNET failed to acquire");
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return 0;
}
rpl_handle = nsysnet_handle_internal;
} else if(library == LIB_GX2) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_GX2", functionName);
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}
if(gx2_handle_internal == 0) {
OSDynLoad_Acquire("gx2.rpl", &gx2_handle_internal);
}
if(gx2_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_GX2 failed to acquire");
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return 0;
}
rpl_handle = gx2_handle_internal;
} else if(library == LIB_AOC) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_AOC", functionName);
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}
if(aoc_handle_internal == 0) {
OSDynLoad_Acquire("nn_aoc.rpl", &aoc_handle_internal);
}
if(aoc_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_AOC failed to acquire");
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return 0;
}
rpl_handle = aoc_handle_internal;
} else if(library == LIB_AX) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_AX", functionName);
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}
if(sound_handle_internal == 0) {
OSDynLoad_Acquire("sndcore2.rpl", &sound_handle_internal);
}
if(sound_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_AX failed to acquire");
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return 0;
}
rpl_handle = sound_handle_internal;
} else if(library == LIB_AX_OLD) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_AX_OLD", functionName);
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}
if(sound_handle_internal_old == 0) {
OSDynLoad_Acquire("snd_core.rpl", &sound_handle_internal_old);
}
if(sound_handle_internal_old == 0) {
DEBUG_FUNCTION_LINE("LIB_AX_OLD failed to acquire");
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return 0;
}
rpl_handle = sound_handle_internal_old;
} else if(library == LIB_FS) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_FS", functionName);
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}
if(coreinit_handle_internal == 0) {
OSDynLoad_Acquire("coreinit.rpl", &coreinit_handle_internal);
}
if(coreinit_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_FS failed to acquire");
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return 0;
}
rpl_handle = coreinit_handle_internal;
} else if(library == LIB_OS) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_OS", functionName);
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}
if(coreinit_handle_internal == 0) {
OSDynLoad_Acquire("coreinit.rpl", &coreinit_handle_internal);
}
if(coreinit_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_OS failed to acquire");
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return 0;
}
rpl_handle = coreinit_handle_internal;
} else if(library == LIB_PADSCORE) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_PADSCORE", functionName);
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}
if(padscore_handle_internal == 0) {
OSDynLoad_Acquire("padscore.rpl", &padscore_handle_internal);
}
if(padscore_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_PADSCORE failed to acquire");
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return 0;
}
rpl_handle = padscore_handle_internal;
} else if(library == LIB_SOCKET) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_SOCKET", functionName);
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}
if(nsysnet_handle_internal == 0) {
OSDynLoad_Acquire("nsysnet.rpl", &nsysnet_handle_internal);
}
if(nsysnet_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_SOCKET failed to acquire");
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return 0;
}
rpl_handle = nsysnet_handle_internal;
} else if(library == LIB_SYS) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_SYS", functionName);
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}
if(sysapp_handle_internal == 0) {
OSDynLoad_Acquire("sysapp.rpl", &sysapp_handle_internal);
}
if(sysapp_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_SYS failed to acquire");
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return 0;
}
rpl_handle = sysapp_handle_internal;
} else if(library == LIB_VPAD) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_VPAD", functionName);
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}
if(vpad_handle_internal == 0) {
OSDynLoad_Acquire("vpad.rpl", &vpad_handle_internal);
}
if(vpad_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_VPAD failed to acquire");
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return 0;
}
rpl_handle = vpad_handle_internal;
} else if(library == LIB_NN_ACP) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_NN_ACP", functionName);
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}
if(acp_handle_internal == 0) {
OSDynLoad_Acquire("nn_acp.rpl", &acp_handle_internal);
}
if(acp_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_NN_ACP failed to acquire");
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return 0;
}
rpl_handle = acp_handle_internal;
} else if(library == LIB_SYSHID) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_SYSHID", functionName);
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}
if(syshid_handle_internal == 0) {
OSDynLoad_Acquire("nsyshid.rpl", &syshid_handle_internal);
}
if(syshid_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_SYSHID failed to acquire");
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return 0;
}
rpl_handle = syshid_handle_internal;
} else if(library == LIB_VPADBASE) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_VPADBASE", functionName);
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}
if(vpadbase_handle_internal == 0) {
OSDynLoad_Acquire("vpadbase.rpl", &vpadbase_handle_internal);
}
if(vpadbase_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_VPADBASE failed to acquire");
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return 0;
}
rpl_handle = vpadbase_handle_internal;
} else if(library == LIB_PROC_UI) {
if(DEBUG_LOG_DYN) {
DEBUG_FUNCTION_LINE("FindExport of %s! From LIB_PROC_UI", functionName);
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}
if(proc_ui_handle_internal == 0) {
OSDynLoad_Acquire("proc_ui.rpl", &proc_ui_handle_internal);
}
if(proc_ui_handle_internal == 0) {
DEBUG_FUNCTION_LINE("LIB_PROC_UI failed to acquire");
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return 0;
}
rpl_handle = proc_ui_handle_internal;
} else if(library == LIB_NTAG) {
if(DEBUG_LOG_DYN) {
log_printf("FindExport of %s! From LIB_NTAG", functionName);
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}
if(ntag_handle_internal == 0) {
OSDynLoad_Acquire("ntag.rpl", &ntag_handle_internal);
}
if(ntag_handle_internal == 0) {
log_print("LIB_NTAG failed to acquire");
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return 0;
}
rpl_handle = ntag_handle_internal;
} else if(library == LIB_NFP) {
if(DEBUG_LOG_DYN) {
log_printf("FindExport of %s! From LIB_NFP", functionName);
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}
if(nfp_handle_internal == 0) {
OSDynLoad_Acquire("nn_nfp.rpl", &nfp_handle_internal);
}
if(nfp_handle_internal == 0) {
log_print("LIB_NFP failed to acquire");
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return 0;
}
rpl_handle = nfp_handle_internal;
} else if(library == LIB_SAVE) {
if(DEBUG_LOG_DYN) {
log_printf("FindExport of %s! From LIB_SAVE", functionName);
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}
if(nn_save_handle_internal == 0) {
OSDynLoad_Acquire("nn_save.rpl", &nn_save_handle_internal);
}
if(nn_save_handle_internal == 0) {
log_print("LIB_SAVE failed to acquire");
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return 0;
}
rpl_handle = nn_save_handle_internal;
} else if(library == LIB_ACT) {
if(DEBUG_LOG_DYN) {
log_printf("FindExport of %s! From LIB_ACT", functionName);
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}
if(nn_act_handle_internal == 0) {
OSDynLoad_Acquire("nn_act.rpl", &nn_act_handle_internal);
}
if(nn_act_handle_internal == 0) {
log_print("LIB_ACT failed to acquire");
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return 0;
}
rpl_handle = nn_act_handle_internal;
} else if(library == LIB_NIM) {
if(DEBUG_LOG_DYN) {
log_printf("FindExport of %s! From LIB_NIM", functionName);
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}
if(nn_nim_handle_internal == 0) {
OSDynLoad_Acquire("nn_nim.rpl", &nn_nim_handle_internal);
}
if(nn_nim_handle_internal == 0) {
log_print("LIB_NIM failed to acquire");
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return 0;
}
rpl_handle = nn_nim_handle_internal;
}
if(!rpl_handle) {
DEBUG_FUNCTION_LINE("Failed to find the RPL handle for %s", functionName);
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return 0;
}
OSDynLoad_FindExport(rpl_handle, 0, functionName, (void**) &real_addr);
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if(!real_addr) {
OSDynLoad_FindExport(rpl_handle, 1, functionName, (void**) &real_addr);
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if(!real_addr) {
DEBUG_FUNCTION_LINE("OSDynLoad_FindExport failed for %s", functionName);
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return 0;
}
}
if((library == LIB_NN_ACP) && (uint32_t)(*(volatile uint32_t*)(real_addr) & 0x48000002) == 0x48000000) {
uint32_t address_diff = (uint32_t)(*(volatile uint32_t*)(real_addr) & 0x03FFFFFC);
if((address_diff & 0x03000000) == 0x03000000) {
address_diff |= 0xFC000000;
}
real_addr += (int32_t)address_diff;
if((uint32_t)(*(volatile uint32_t*)(real_addr) & 0x48000002) == 0x48000000) {
return 0;
}
}
return real_addr;
}
void resetLibs() {
acp_handle_internal = 0;
aoc_handle_internal = 0;
sound_handle_internal = 0;
sound_handle_internal_old = 0;
libcurl_handle_internal = 0;
gx2_handle_internal = 0;
nfp_handle_internal = 0;
nn_act_handle_internal = 0;
nn_nim_handle_internal = 0;
nn_save_handle_internal = 0;
ntag_handle_internal = 0;
coreinit_handle_internal = 0;
padscore_handle_internal = 0;
proc_ui_handle_internal = 0;
nsysnet_handle_internal = 0;
sysapp_handle_internal = 0;
syshid_handle_internal = 0;
vpad_handle_internal = 0;
vpadbase_handle_internal = 0;
}