Add framework for in-game patches

src/patcher/patcher.cpp

@@ -0,0 +1,20 @@
+#include "patcher.h"
+
+#include "utils/logger.h"
+
+#include <kernel/kernel.h>
+#include <coreinit/memorymap.h>
+
+bool replace_string(uint32_t start, uint32_t size, const char* original_val, size_t original_val_sz, const char* new_val, size_t new_val_sz) {
+    for (uint32_t addr = start; addr < start + size - original_val_sz; addr++) {
+        int ret = memcmp(original_val, (void*)addr, original_val_sz);
+        if (ret == 0) {
+            DEBUG_FUNCTION_LINE("found str @%08x: %s", addr, (const char*)addr);
+            KernelCopyData(OSEffectiveToPhysical(addr), OSEffectiveToPhysical((uint32_t)new_val), new_val_sz);
+            DEBUG_FUNCTION_LINE("new str   @%08x: %s", addr, (const char*)addr);
+            return true;
+        }
+    }
+
+    return false;
+}