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Further work on implementing support for cheats

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This commit is contained in:
Gericom
2026-02-21 19:30:03 +01:00
parent 3300c5277c
commit 83046e2cc2
11 changed files with 286 additions and 15 deletions
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31
arm9/source/Arm7Patcher.cpp
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@@ -15,10 +15,12 @@
#include "patches/arm7/DisableArm7WramClearPatch.h"
#include "patches/arm7/sdk5/Sdk5DsiSdCardRedirectPatch.h"
#include "patches/arm7/PokemonDownloaderArm7Patch.h"
#include "patches/arm7/cheats/CheatEnginePatch.h"
#include "Arm7Patcher.h"
void* Arm7Patcher::ApplyPatches(const LoaderPlatform* loaderPlatform) const
void* Arm7Patcher::ApplyPatches(const LoaderPlatform* loaderPlatform, u32 cheatsLength, void*& cheatsPtr) const
{
cheatsPtr = nullptr;
auto romHeader = (const nds_header_ntr_t*)TWL_SHARED_MEMORY->ntrSharedMem.romHeader;
auto twlRomHeader = (const nds_header_twl_t*)TWL_SHARED_MEMORY->twlRomHeader;
ModuleParamsLocator moduleParamsLocator;
@@ -91,10 +93,18 @@ void* Arm7Patcher::ApplyPatches(const LoaderPlatform* loaderPlatform) const
patchCollection.AddPatch(new PokemonDownloaderArm7Patch());
}
CheatEnginePatch* cheatEnginePatch = nullptr;
if (cheatsLength > 0)
{
cheatEnginePatch = new CheatEnginePatch();
patchCollection.AddPatch(cheatEnginePatch);
}
if (arm7ArenaPatch->FindPatchTarget(patchContext))
{
const u32 arm7PatchSpaceSize = 0x800;
void* privateWramHeapStart = arm7ArenaPatch->GetArm7PrivateWramArenaLo();
u32 mainMemoryArenaLo = (u32)arm7ArenaPatch->GetMainMemoryArenaLo();
if (0x0380F780 - (u32)privateWramHeapStart - 0x2100 >= arm7PatchSpaceSize)
{
patchSpaceStart = privateWramHeapStart;
@@ -103,7 +113,6 @@ void* Arm7Patcher::ApplyPatches(const LoaderPlatform* loaderPlatform) const
else
{
LOG_DEBUG("Arm 7 patches placed in main memory\n");
u32 mainMemoryArenaLo = (u32)arm7ArenaPatch->GetMainMemoryArenaLo();
if (gIsDsiMode && romHeader->unitCode == 0)
{
patchSpaceStart = (void*)(mainMemoryArenaLo & ~0xC00000); // 0x023...
@@ -112,8 +121,24 @@ void* Arm7Patcher::ApplyPatches(const LoaderPlatform* loaderPlatform) const
{
patchSpaceStart = (void*)(mainMemoryArenaLo | 0x800000); // make sure it ends up in the right place while in 16MB mode
}
arm7ArenaPatch->SetMainMemoryArenaLo((u8*)mainMemoryArenaLo + arm7PatchSpaceSize);
mainMemoryArenaLo += arm7PatchSpaceSize;
}
if (cheatsLength > 0)
{
void* cheats;
if (gIsDsiMode && romHeader->unitCode == 0)
{
cheats = (void*)(mainMemoryArenaLo & ~0xC00000); // 0x023...
}
else
{
cheats = (void*)(mainMemoryArenaLo | 0x800000); // make sure it ends up in the right place while in 16MB mode
}
cheatsPtr = cheats;
cheatEnginePatch->SetCheats(cheats);
mainMemoryArenaLo += cheatsLength;
}
arm7ArenaPatch->SetMainMemoryArenaLo((void*)mainMemoryArenaLo);
patchContext.GetPatchHeap().AddFreeSpace(patchSpaceStart, arm7PatchSpaceSize);
}