74 lines
2.8 KiB
C++
74 lines
2.8 KiB
C++
/****************************************************************************
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* Copyright (C) 2018-2020 Maschell
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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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#include <coreinit/cache.h>
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#include <coreinit/memorymap.h>
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#include <cstdint>
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#include <cstdio>
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#include <cstring>
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#include "kernel.h"
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/* assembly functions */
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extern "C" void Syscall_0x36(void);
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extern "C" void KernelPatchesRevertHook(void);
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extern "C" void KernelPatches(void);
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void __attribute__((noinline)) kern_write(void *addr, uint32_t value);
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void doKernelSetup() {
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kern_write((void *) (KERN_SYSCALL_TBL_1 + (0x36 * 4)), (unsigned int) KernelPatches);
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kern_write((void *) (KERN_SYSCALL_TBL_2 + (0x36 * 4)), (unsigned int) KernelPatches);
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kern_write((void *) (KERN_SYSCALL_TBL_3 + (0x36 * 4)), (unsigned int) KernelPatches);
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kern_write((void *) (KERN_SYSCALL_TBL_4 + (0x36 * 4)), (unsigned int) KernelPatches);
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kern_write((void *) (KERN_SYSCALL_TBL_5 + (0x36 * 4)), (unsigned int) KernelPatches);
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Syscall_0x36();
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}
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void revertKernelHook() {
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kern_write((void *) (KERN_SYSCALL_TBL_1 + (0x36 * 4)), (unsigned int) KernelPatchesRevertHook);
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kern_write((void *) (KERN_SYSCALL_TBL_2 + (0x36 * 4)), (unsigned int) KernelPatchesRevertHook);
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kern_write((void *) (KERN_SYSCALL_TBL_3 + (0x36 * 4)), (unsigned int) KernelPatchesRevertHook);
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kern_write((void *) (KERN_SYSCALL_TBL_4 + (0x36 * 4)), (unsigned int) KernelPatchesRevertHook);
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kern_write((void *) (KERN_SYSCALL_TBL_5 + (0x36 * 4)), (unsigned int) KernelPatchesRevertHook);
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Syscall_0x36();
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}
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/* Write a 32-bit word with kernel permissions */
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void __attribute__((noinline)) kern_write(void *addr, uint32_t value) {
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asm volatile(
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"li 3,1\n"
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"li 4,0\n"
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"mr 5,%1\n"
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"li 6,0\n"
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"li 7,0\n"
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"lis 8,1\n"
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"mr 9,%0\n"
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"mr %1,1\n"
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"li 0,0x3500\n"
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"sc\n"
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"nop\n"
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"mr 1,%1\n"
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:
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: "r"(addr), "r"(value)
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: "memory", "ctr", "lr", "0", "3", "4", "5", "6", "7", "8", "9", "10",
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"11", "12");
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}
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