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Maschell
2020-04-28 14:43:07 +02:00
commit 9a4068d15b
66 changed files with 8989 additions and 0 deletions
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59
source/kernel.cpp Normal file
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#include "kernel.h"
#include "relocator.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 SetupRelocator() {
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);
uint32_t entryPoint = load_loader_elf(0, (char*) ___relocator_relocator_elf, ___relocator_relocator_elf_len);
unsigned int repl_addr = ADDRESS_main_entry_hook;
KernelWriteU32(repl_addr,0x48000003 | entryPoint);
DCFlushRange((void*) repl_addr, 4);
ICInvalidateRange((void*)(repl_addr), 4);
}
void KernelWriteU32(uint32_t addr, uint32_t value) {
ICInvalidateRange(&value, 4);
DCFlushRange(&value, 4);
uint32_t dst = (uint32_t) OSEffectiveToPhysical(addr);
uint32_t 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"
);
}