mirror of
https://github.com/wiiu-env/WiiUPluginLoaderBackend.git
synced 2024-11-18 02:39:20 +01:00
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
#include "kernel_utils.h"
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#include "kernel_defs.h"
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#include <coreinit/cache.h>
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#include <coreinit/memorymap.h>
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extern void SCKernelCopyData(uint32_t dst, uint32_t src, uint32_t len);
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void KernelWrite(uint32_t addr, const void *data, uint32_t length) {
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uint32_t dst = (uint32_t) OSEffectiveToPhysical(addr);
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uint32_t src = (uint32_t) OSEffectiveToPhysical((uint32_t) data);
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KernelCopyData(dst, src, length);
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DCFlushRange((void *) addr, length);
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ICInvalidateRange((void *) addr, length);
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}
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void KernelWriteU32(uint32_t addr, uint32_t value) {
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uint32_t dst = (uint32_t) OSEffectiveToPhysical(addr);
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uint32_t src = (uint32_t) OSEffectiveToPhysical((uint32_t) &value);
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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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}
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/* Read a 32-bit word with kernel permissions */
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uint32_t __attribute__ ((noinline)) kern_read(const void *addr) {
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uint32_t result;
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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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"li 5,0\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,%1\n"
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"li 0,0x3400\n"
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"mr %0,1\n"
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"sc\n"
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"nop\n"
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"mr 1,%0\n"
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"mr %0,3\n"
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: "=r"(result)
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: "b"(addr)
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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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return result;
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}
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void PatchSyscall(int index, uint32_t addr) {
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//DEBUG_FUNCTION_LINE("Patching Syscall 0x%02X\n",index);
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kern_write((void *) (KERN_SYSCALL_TBL1 + index * 4), addr);
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kern_write((void *) (KERN_SYSCALL_TBL2 + index * 4), addr);
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kern_write((void *) (KERN_SYSCALL_TBL3 + index * 4), addr);
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kern_write((void *) (KERN_SYSCALL_TBL4 + index * 4), addr);
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kern_write((void *) (KERN_SYSCALL_TBL5 + index * 4), addr);
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}
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void kernelInitialize() {
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static uint8_t ucSyscallsSetupRequired = 1;
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if (!ucSyscallsSetupRequired)
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return;
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ucSyscallsSetupRequired = 0;
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PatchSyscall(0x25, (uint32_t) SCKernelCopyData);
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}
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