mirror of
https://github.com/wiiu-env/EnvironmentLoader.git
synced 2024-11-23 14:39:15 +01:00
55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
#include "kernel.h"
|
|
#include "ElfUtils.h"
|
|
#include <coreinit/cache.h>
|
|
#include <coreinit/memorymap.h>
|
|
|
|
extern "C" void SCKernelCopyData(uint32_t addr, uint32_t src, uint32_t len);
|
|
extern "C" void SC_KernelCopyData(uint32_t addr, uint32_t src, uint32_t len);
|
|
|
|
void RevertMainHook() {
|
|
kern_write((void *) (KERN_SYSCALL_TBL_1 + (0x25 * 4)), (unsigned int) SCKernelCopyData);
|
|
kern_write((void *) (KERN_SYSCALL_TBL_2 + (0x25 * 4)), (unsigned int) SCKernelCopyData);
|
|
kern_write((void *) (KERN_SYSCALL_TBL_3 + (0x25 * 4)), (unsigned int) SCKernelCopyData);
|
|
kern_write((void *) (KERN_SYSCALL_TBL_4 + (0x25 * 4)), (unsigned int) SCKernelCopyData);
|
|
kern_write((void *) (KERN_SYSCALL_TBL_5 + (0x25 * 4)), (unsigned int) SCKernelCopyData);
|
|
|
|
unsigned int repl_addr = ADDRESS_main_entry_hook;
|
|
KernelWriteU32(repl_addr, 0x4E800421);
|
|
DCFlushRange((void *) repl_addr, 4);
|
|
ICInvalidateRange((void *) (repl_addr), 4);
|
|
}
|
|
|
|
void KernelWriteU32(uint32_t addr, uint32_t value) {
|
|
ICInvalidateRange(&value, 4);
|
|
DCFlushRange(&value, 4);
|
|
|
|
auto dst = (uint32_t) OSEffectiveToPhysical(addr);
|
|
auto src = (uint32_t) OSEffectiveToPhysical((uint32_t) &value);
|
|
|
|
SC_KernelCopyData(dst, src, 4);
|
|
|
|
DCFlushRange((void *) addr, 4);
|
|
ICInvalidateRange((void *) addr, 4);
|
|
}
|
|
|
|
/* Write a 32-bit word with kernel permissions */
|
|
void __attribute__((noinline)) kern_write(void *addr, uint32_t value) {
|
|
asm volatile(
|
|
"li 3,1\n"
|
|
"li 4,0\n"
|
|
"mr 5,%1\n"
|
|
"li 6,0\n"
|
|
"li 7,0\n"
|
|
"lis 8,1\n"
|
|
"mr 9,%0\n"
|
|
"mr %1,1\n"
|
|
"li 0,0x3500\n"
|
|
"sc\n"
|
|
"nop\n"
|
|
"mr 1,%1\n"
|
|
:
|
|
: "r"(addr), "r"(value)
|
|
: "memory", "ctr", "lr", "0", "3", "4", "5", "6", "7", "8", "9", "10",
|
|
"11", "12");
|
|
}
|