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Add framework for in-game patches

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This commit is contained in:
Ash Logan 2022-09-26 21:56:56 +10:00
commit e86bb6cf15
13 changed files with 268 additions and 74 deletions
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74
src/main.cpp
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@ -29,6 +29,7 @@
#include "wut_extra.h"
#include <utils/logger.h>
#include "url_patches.h"
#include "patcher/ingame.h"
/**
Mandatory plugin information.
@ -48,22 +49,6 @@ bool prevSkipValue = false;
#include <kernel/kernel.h>
#include <mocha/mocha.h>
//#ifdef OLD_WUPS
extern "C" {
OSDynLoad_Error
OSDynLoad_IsModuleLoaded(char const *name,
OSDynLoad_Module *outModule);
}
//#endif
const char original_url[] = "discovery.olv.nintendo.net/v1/endpoint";
const char new_url[] = "discovery.olv.pretendo.cc/v1/endpoint";
_Static_assert(sizeof(original_url) > sizeof(new_url),
"new_url too long! Must be less than 38chars.");
// We'll keep a handle to nn_olv, just to ensure it doesn't get unloaded
static OSDynLoad_Module olv_handle;
//thanks @Gary#4139 :p
static void write_string(uint32_t addr, const char* str)
{
@ -209,69 +194,14 @@ WUPS_CONFIG_CLOSED() {
prevSkipValue = skipPatches;
}
bool checkForOlvLibs() {
OSDynLoad_Module olv_handle = 0;
OSDynLoad_Error dret;
dret = OSDynLoad_IsModuleLoaded("nn_olv", &olv_handle);
if (dret == OS_DYNLOAD_OK && olv_handle != 0) {
return true;
}
dret = OSDynLoad_IsModuleLoaded("nn_olv2", &olv_handle);
if (dret == OS_DYNLOAD_OK && olv_handle != 0) {
return true;
}
return false;
}
bool replace(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;
}
ON_APPLICATION_START() {
WHBLogUdpInit();
DEBUG_FUNCTION_LINE("Inkay: hewwo!\n");
auto olvLoaded = checkForOlvLibs();
if (!olvLoaded) {
DEBUG_FUNCTION_LINE("Inkay: no olv, quitting for now\n");
return;
}
if (!skipPatches) {
OSDynLoad_Acquire("nn_olv", &olv_handle);
DEBUG_FUNCTION_LINE("Inkay: olv! %08x\n", olv_handle);
//wish there was a better way than "blow through MEM2"
uint32_t base_addr, size;
if (OSGetMemBound(OS_MEM2, &base_addr, &size)) {
DEBUG_FUNCTION_LINE("Inkay: OSGetMemBound failed!");
return;
}
replace(base_addr, size, original_url, sizeof(original_url), new_url, sizeof(new_url));
}
else {
DEBUG_FUNCTION_LINE("Inkay: Miiverse patches skipped.");
}
if (!skipPatches) RunPatcher();
}
ON_APPLICATION_ENDS() {
DEBUG_FUNCTION_LINE("Inkay: shutting down...\n");
OSDynLoad_Release(olv_handle);
}