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Initial work on patch list

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This commit is contained in:
Gericom
2026-01-24 21:06:14 +01:00
parent edf18f25e2
commit fe2eff8ffe
27 changed files with 543 additions and 35 deletions
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4
arm7/source/loader/ApListFactory.cpp
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@@ -1,7 +1,7 @@
#include "common.h"
#include "ApListFactory.h"
ApList* ApListFactory::CreateFromFile(const TCHAR *path)
std::unique_ptr<ApList> ApListFactory::CreateFromFile(const TCHAR* path)
{
FIL file;
if (f_open(&file, path, FA_OPEN_EXISTING | FA_READ) != FR_OK)
@@ -20,5 +20,5 @@ ApList* ApListFactory::CreateFromFile(const TCHAR *path)
}
f_close(&file);
return new ApList(std::move(entries), entryCount);
return std::make_unique<ApList>(std::move(entries), entryCount);
}

3
arm7/source/loader/ApListFactory.h
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@@ -1,4 +1,5 @@
#pragma once
#include <memory>
#include "ApList.h"
/// @brief Factory for creating \see ApList instances.
@@ -8,5 +9,5 @@ public:
/// @brief Creates an \see ApList instance from the file at the given \p path.
/// @param path The ap list file path.
/// @return A pointer to the constructed \see ApList instance, or \c nullptr if construction failed.
ApList* CreateFromFile(const TCHAR* path);
std::unique_ptr<ApList> CreateFromFile(const TCHAR* path);
};

3
arm7/source/loader/CardSaveArranger.cpp
View File

@@ -29,7 +29,7 @@ bool CardSaveArranger::SetupCardSave(const nds_header_ntr_t* header, const TCHAR
}
else
{
SaveList* saveList = SaveListFactory().CreateFromFile(SAVE_LIST_PATH);
auto saveList = SaveListFactory().CreateFromFile(SAVE_LIST_PATH);
if (saveList)
{
const auto saveListEntry = saveList->FindEntry(header->gameCode);
@@ -44,7 +44,6 @@ bool CardSaveArranger::SetupCardSave(const nds_header_ntr_t* header, const TCHAR
saveSize = saveListEntry->GetSaveSize();
saveListEntry->Dump();
}
delete saveList;
}
}
if (saveSize == 0)

63
arm7/source/loader/NdsLoader.cpp
View File

@@ -26,9 +26,11 @@
#include "TwlAes.h"
#include "DSMode.h"
#include "Arm7IoRegisterClearer.h"
#include "PatchListFactory.h"
#include "NdsLoader.h"
#define AP_LIST_PATH "/_pico/aplist.bin"
#define PATCH_LIST_PATH "/_pico/patchlist.bin"
#define BIOS_NDS7_PATH "/_pico/biosnds7.rom"
typedef void (*entrypoint_t)(void);
@@ -290,6 +292,8 @@ void NdsLoader::Load(BootMode bootMode)
// wait for arm9 patches to be ready
receiveFromArm9();
HandleGameSpecificPatches();
LOG_DEBUG("Arm9 patches done\n");
ApplyArm7Patches();
@@ -438,6 +442,63 @@ void NdsLoader::InsertArgv()
HOMEBREW_ARGV->length = argSize;
}
void NdsLoader::HandleGameSpecificPatches()
{
auto patchList = PatchListFactory().CreateFromFile(PATCH_LIST_PATH);
if (patchList)
{
auto entry = patchList->FindEntry(_romHeader.gameCode, _romHeader.softwareVersion);
if (entry)
{
auto patch = &entry->firstPatch;
for (int patchIndex = 0; patchIndex < entry->patchCount; patchIndex++)
{
switch (patch->common.patchType)
{
case PatchListPatchType::Replace:
{
LOG_DEBUG("Applying replace patch. %d bytes to 0x%08X\n",
patch->replacePatch.dataLength, patch->replacePatch.address);
memcpy((void*)patch->replacePatch.address, patch->replacePatch.data, patch->replacePatch.dataLength);
patch = (const PatchListEntryPatch*)&patch->replacePatch.data[(patch->replacePatch.dataLength + 3) & ~3];
break;
}
case PatchListPatchType::Metafortress:
{
LOG_DEBUG("Applying Metafortress patch. %d addresses\n", patch->metafortressPatch.addressCount);
auto addresses = patch->metafortressPatch.addresses;
for (uint32_t addressIndex = 0; addressIndex < patch->metafortressPatch.addressCount; addressIndex++)
{
uint32_t address = addresses[addressIndex];
if ((address & 1) != 0)
{
// thumb
*(u16*)(address & ~1) = 0x4280; // cmp r0, r0
}
else
{
// arm
*(u32*)address = 0xE1500000; // cmp r0, r0
}
}
patch = (const PatchListEntryPatch*)&addresses[patch->metafortressPatch.addressCount];
break;
}
default:
{
LOG_ERROR("Unknown patch type\n");
return;
}
}
}
}
else
{
LOG_DEBUG("No entry found in patch list\n");
}
}
}
void NdsLoader::HandleHomebrewPatching()
{
if (_launcherPath != nullptr && _launcherPath[0] != 0)
@@ -660,8 +721,6 @@ void NdsLoader::HandleAntiPiracy()
{
LOG_DEBUG("No entry found in ap list\n");
}
delete apList;
}
}

1
arm7/source/loader/NdsLoader.h
View File

@@ -79,6 +79,7 @@ private:
char driveLetter, const char* deviceName, const char* path, u8 flags, u8 accessRights);
void SetupDsiDeviceList();
void InsertArgv();
void HandleGameSpecificPatches();
void HandleHomebrewPatching();
bool TrySetupDsiWareSave();
bool TryDecryptSecureArea();

32
arm7/source/loader/PatchList.cpp Normal file
View File

@@ -0,0 +1,32 @@
#include "common.h"
#include <algorithm>
#include "PatchList.h"
const PatchListEntry* PatchList::FindEntry(u32 gameCode, u8 gameVersion)
{
auto header = reinterpret_cast<const PatchListHeader*>(_fileContents.get());
u32 count = header->entryCount;
auto entries = header->headerEntries;
if (count != 0)
{
const auto gameEntry = std::lower_bound(entries, entries + count, gameCode,
[gameVersion] (const PatchListHeaderEntry& entry, u32 value)
{
if (entry.gameCode == value)
{
return entry.gameVersion < gameVersion;
}
else
{
return entry.gameCode < value;
}
});
if (gameEntry != entries + count && gameEntry->gameCode == gameCode && gameEntry->gameVersion == gameVersion)
{
return reinterpret_cast<const PatchListEntry*>(_fileContents.get() + gameEntry->offset);
}
}
return nullptr;
}

71
arm7/source/loader/PatchList.h Normal file
View File

@@ -0,0 +1,71 @@
#pragma once
#include <memory>
enum class PatchListPatchType : u8
{
Replace,
Metafortress
};
struct PatchListHeaderEntry
{
u32 gameCode;
u32 gameVersion : 8;
u32 offset : 24;
};
struct PatchListHeader
{
u32 entryCount;
PatchListHeaderEntry headerEntries[1];
};
union PatchListEntryPatch
{
struct
{
PatchListPatchType patchType;
u8 reserved;
} common;
struct
{
PatchListPatchType patchType;
u8 reserved;
u16 dataLength;
u32 address;
u8 data[1];
} replacePatch;
struct
{
PatchListPatchType patchType;
u8 reserved;
u16 addressCount;
u32 addresses[1];
} metafortressPatch;
};
static_assert(offsetof(PatchListEntryPatch, replacePatch.dataLength) == 2);
static_assert(offsetof(PatchListEntryPatch, replacePatch.address) == 4);
static_assert(offsetof(PatchListEntryPatch, replacePatch.data) == 8);
static_assert(offsetof(PatchListEntryPatch, metafortressPatch.addressCount) == 2);
static_assert(offsetof(PatchListEntryPatch, metafortressPatch.addresses) == 4);
struct PatchListEntry
{
u16 length;
u16 patchCount;
PatchListEntryPatch firstPatch;
};
/// @brief Class representing a patch list.
class PatchList
{
public:
PatchList(std::unique_ptr<const u8[]> fileContents)
: _fileContents(std::move(fileContents)) { }
const PatchListEntry* FindEntry(u32 gameCode, u8 gameVersion);
private:
std::unique_ptr<const u8[]> _fileContents;
};

24
arm7/source/loader/PatchListFactory.cpp Normal file
View File

@@ -0,0 +1,24 @@
#include "common.h"
#include "PatchListFactory.h"
std::unique_ptr<PatchList> PatchListFactory::CreateFromFile(const TCHAR* path)
{
FIL file;
if (f_open(&file, path, FA_OPEN_EXISTING | FA_READ) != FR_OK)
{
LOG_FATAL("Failed to open patch list file\n");
return nullptr;
}
u32 fileSize = f_size(&file);
auto fileContents = std::make_unique_for_overwrite<u8[]>(fileSize);
UINT bytesRead = 0;
FRESULT result = f_read(&file, fileContents.get(), fileSize, &bytesRead);
if (result != FR_OK || bytesRead != fileSize)
{
LOG_FATAL("Failed to read patch list file\n");
return nullptr;
}
f_close(&file);
return std::make_unique<PatchList>(std::move(fileContents));
}

12
arm7/source/loader/PatchListFactory.h Normal file
View File

@@ -0,0 +1,12 @@
#pragma once
#include "PatchList.h"
/// @brief Factory for creating \see ApList instances.
class PatchListFactory
{
public:
/// @brief Creates an \see PatchList instance from the file at the given \p path.
/// @param path The patch list file path.
/// @return A pointer to the constructed \see PatchList instance, or \c nullptr if construction failed.
std::unique_ptr<PatchList> CreateFromFile(const TCHAR* path);
};

4
arm7/source/loader/SaveListFactory.cpp
View File

@@ -1,7 +1,7 @@
#include "common.h"
#include "SaveListFactory.h"
SaveList* SaveListFactory::CreateFromFile(const TCHAR *path)
std::unique_ptr<SaveList> SaveListFactory::CreateFromFile(const TCHAR* path)
{
FIL file;
if (f_open(&file, path, FA_OPEN_EXISTING | FA_READ) != FR_OK)
@@ -20,5 +20,5 @@ SaveList* SaveListFactory::CreateFromFile(const TCHAR *path)
}
f_close(&file);
return new SaveList(std::move(entries), entryCount);
return std::make_unique<SaveList>(std::move(entries), entryCount);
}

3
arm7/source/loader/SaveListFactory.h
View File

@@ -1,4 +1,5 @@
#pragma once
#include <memory>
#include "SaveList.h"
/// @brief Factory for creating \see SaveList instances.
@@ -8,5 +9,5 @@ public:
/// @brief Creates a \see SaveList instance from the file at the given \p path.
/// @param path The save list file path.
/// @return A pointer to the constructed \see SaveList instance, or \c nullptr if construction failed.
SaveList* CreateFromFile(const TCHAR* path);
std::unique_ptr<SaveList> CreateFromFile(const TCHAR* path);
};