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typeinfo cast port

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This commit is contained in:
altalk23 2024-06-01 20:23:03 +03:00
parent cf111ca000
commit 008be9e780
1 changed files with 34 additions and 9 deletions
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43
loader/include/Geode/platform/windows.hpp
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@ -27,36 +27,53 @@ namespace geode::base {
}
}
namespace geode::cast {
template <class Type>
struct ShrunkPointer {
uint32_t m_ptrOffset;
Type* into(uintptr_t base) {
return reinterpret_cast<Type*>(base + m_ptrOffset);
}
};
struct TypeDescriptorType {
void* m_typeinfoTable;
int32_t m_spare;
intptr_t m_spare;
char m_typeDescriptorName[0x100];
};
struct ClassDescriptorType;
struct BaseClassDescriptorType {
TypeDescriptorType* m_typeDescriptor;
ShrunkPointer<TypeDescriptorType> m_typeDescriptor;
int32_t m_numContainedBases;
int32_t m_memberDisplacement[3];
int32_t m_attributes;
ClassDescriptorType* m_classDescriptor;
ShrunkPointer<ClassDescriptorType> m_classDescriptor;
};
struct BaseClassArrayType {
ShrunkPointer<BaseClassDescriptorType> m_descriptorEntries[0x100];
};
struct ClassDescriptorType {
int32_t m_signature;
int32_t m_attributes;
int32_t m_numBaseClasses;
BaseClassDescriptorType** m_baseClassArray;
ShrunkPointer<BaseClassArrayType> m_baseClassArray;
};
struct CompleteLocatorType {
int32_t m_signature;
int32_t m_offset;
int32_t m_cdOffset;
TypeDescriptorType* m_typeDescriptor;
ClassDescriptorType* m_classDescriptor;
ShrunkPointer<TypeDescriptorType> m_typeDescriptor;
ShrunkPointer<ClassDescriptorType> m_classDescriptor;
#ifdef GEODE_IS_X64
int32_t m_locatorOffset;
#endif
};
struct MetaPointerType {
@ -89,12 +106,20 @@ namespace geode::cast {
auto afterIdent = static_cast<char const*>(afterDesc->m_typeDescriptorName);
auto classDesc = metaPtr->m_completeLocator->m_classDescriptor;
#ifdef GEODE_IS_X64
auto locatorOffset = metaPtr->m_completeLocator->m_locatorOffset;
auto base = reinterpret_cast<uintptr_t>(metaPtr->m_completeLocator) - locatorOffset;
#else
auto base = 0;
#endif
auto classDesc = metaPtr->m_completeLocator->m_classDescriptor.into(base);
for (int32_t i = 0; i < classDesc->m_numBaseClasses; ++i) {
auto entry = classDesc->m_baseClassArray.into(base)->m_descriptorEntries[i].into(base);
auto optionIdent = static_cast<char const*>(
classDesc->m_baseClassArray[i]->m_typeDescriptor->m_typeDescriptorName
entry->m_typeDescriptor.into(base)->m_typeDescriptorName
);
auto optionOffset = classDesc->m_baseClassArray[i]->m_memberDisplacement[0];
auto optionOffset = entry->m_memberDisplacement[0];
if (std::strcmp(afterIdent, optionIdent) == 0) {
auto afterPtr = reinterpret_cast<std::byte*>(basePtr) + optionOffset;