mirror of
https://github.com/wiiu-env/EnvironmentLoader.git
synced 2024-11-30 09:24:14 +01:00
55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
#include "kernel.h"
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#include "ElfUtils.h"
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#include <coreinit/cache.h>
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#include <coreinit/memorymap.h>
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extern "C" void SCKernelCopyData(uint32_t addr, uint32_t src, uint32_t len);
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extern "C" void SC_KernelCopyData(uint32_t addr, uint32_t src, uint32_t len);
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void RevertMainHook() {
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kern_write((void *) (KERN_SYSCALL_TBL_1 + (0x25 * 4)), (unsigned int) SCKernelCopyData);
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kern_write((void *) (KERN_SYSCALL_TBL_2 + (0x25 * 4)), (unsigned int) SCKernelCopyData);
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kern_write((void *) (KERN_SYSCALL_TBL_3 + (0x25 * 4)), (unsigned int) SCKernelCopyData);
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kern_write((void *) (KERN_SYSCALL_TBL_4 + (0x25 * 4)), (unsigned int) SCKernelCopyData);
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kern_write((void *) (KERN_SYSCALL_TBL_5 + (0x25 * 4)), (unsigned int) SCKernelCopyData);
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unsigned int repl_addr = ADDRESS_main_entry_hook;
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KernelWriteU32(repl_addr, 0x4E800421);
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DCFlushRange((void *) repl_addr, 4);
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ICInvalidateRange((void *) (repl_addr), 4);
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}
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void KernelWriteU32(uint32_t addr, uint32_t value) {
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ICInvalidateRange(&value, 4);
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DCFlushRange(&value, 4);
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auto dst = (uint32_t) OSEffectiveToPhysical(addr);
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auto src = (uint32_t) OSEffectiveToPhysical((uint32_t) &value);
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SC_KernelCopyData(dst, src, 4);
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DCFlushRange((void *) addr, 4);
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ICInvalidateRange((void *) addr, 4);
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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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