79 lines
2.6 KiB
C
79 lines
2.6 KiB
C
/*
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* This file is part of Luma3DS
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* Copyright (C) 2016-2020 Aurora Wright, TuxSH
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Additional Terms 7.b and 7.c of GPLv3 apply to this file:
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* * Requiring preservation of specified reasonable legal notices or
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* author attributions in that material or in the Appropriate Legal
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* Notices displayed by works containing it.
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* * Prohibiting misrepresentation of the origin of that material,
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* or requiring that modified versions of such material be marked in
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* reasonable ways as different from the original version.
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*/
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#include <3ds.h>
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#include <string.h>
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#include "csvc.h"
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#include "process_patches.h"
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#include "utils.h"
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Result OpenProcessByName(const char *name, Handle *h)
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{
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u32 pidList[0x40];
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s32 processCount;
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svcGetProcessList(&processCount, pidList, 0x40);
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Handle dstProcessHandle = 0;
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for(s32 i = 0; i < processCount; i++)
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{
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Handle processHandle;
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Result res = svcOpenProcess(&processHandle, pidList[i]);
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if(R_FAILED(res))
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continue;
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char procName[8] = {0};
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svcGetProcessInfo((s64 *)procName, processHandle, 0x10000);
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if(strncmp(procName, name, 8) == 0)
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dstProcessHandle = processHandle;
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else
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svcCloseHandle(processHandle);
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}
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if(dstProcessHandle == 0)
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return -1;
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*h = dstProcessHandle;
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return 0;
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}
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Result PatchProcessByName(const char *name, Result (*func)(u32 size))
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{
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Result res;
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Handle processHandle;
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OpenProcessByName(name, &processHandle);
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s64 textTotalRoundedSize = 0, startAddress = 0;
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svcGetProcessInfo(&textTotalRoundedSize, processHandle, 0x10002); // only patch .text
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svcGetProcessInfo(&startAddress, processHandle, 0x10005);
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if(R_FAILED(res = svcMapProcessMemoryEx(processHandle, 0x00100000, (u32) startAddress, textTotalRoundedSize)))
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return res;
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res = func(textTotalRoundedSize);
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svcUnmapProcessMemoryEx(processHandle, 0x00100000, textTotalRoundedSize);
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return res;
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}
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