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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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63
arm7/source/loader/NdsLoader.cpp
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@@ -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;
}
}