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Bus: Protect main RAM buffer

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Get rid of write-time checks.
This commit is contained in:
Stenzek
2023-10-07 18:10:09 +10:00
parent 79e1ae3e54
commit a062b00c1a
12 changed files with 82 additions and 99 deletions
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14
src/core/cpu_code_cache.cpp
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@ -672,7 +672,19 @@ void CPU::CodeCache::ClearBlocks()
Common::PageFaultHandler::HandlerResult CPU::CodeCache::ExceptionHandler(void* exception_pc, void* fault_address,
bool is_write)
{
// TODO: Catch general RAM writes, not just fastmem
if (static_cast<const u8*>(fault_address) >= Bus::g_ram &&
static_cast<const u8*>(fault_address) < (Bus::g_ram + Bus::RAM_8MB_SIZE))
{
// Writing to protected RAM.
DebugAssert(is_write);
const u32 guest_address = static_cast<u32>(static_cast<const u8*>(fault_address) - Bus::g_ram);
const u32 page_index = Bus::GetRAMCodePageIndex(guest_address);
Log_DevFmt("Page fault on protected RAM @ 0x{:08X} (page #{}), invalidating code cache.", guest_address,
page_index);
InvalidateBlocksWithPageIndex(page_index);
return Common::PageFaultHandler::HandlerResult::ContinueExecution;
}
#ifdef ENABLE_RECOMPILER_SUPPORT
return HandleFastmemException(exception_pc, fault_address, is_write);
#else