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Code Issues Releases Activity

memory: check page against address space size

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This commit is contained in:
Liam 2023-07-25 09:51:06 -04:00
parent 18000df5e9
commit 07f71e2620
1 changed files with 18 additions and 3 deletions
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21
src/core/memory.cpp
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@ -24,6 +24,16 @@
namespace Core::Memory { namespace Core::Memory {
namespace {
bool AddressSpaceContains(const Common::PageTable& table, const Common::ProcessAddress addr,
const std::size_t size) {
const Common::ProcessAddress max_addr = 1ULL << table.GetAddressSpaceBits();
return addr + size >= addr && addr + size <= max_addr;
}
} // namespace
// Implementation class used to keep the specifics of the memory subsystem hidden // Implementation class used to keep the specifics of the memory subsystem hidden
// from outside classes. This also allows modification to the internals of the memory // from outside classes. This also allows modification to the internals of the memory
// subsystem without needing to rebuild all files that make use of the memory interface. // subsystem without needing to rebuild all files that make use of the memory interface.
@ -191,6 +201,11 @@ struct Memory::Impl {
std::size_t page_offset = addr & YUZU_PAGEMASK; std::size_t page_offset = addr & YUZU_PAGEMASK;
bool user_accessible = true; bool user_accessible = true;
if (!AddressSpaceContains(page_table, addr, size)) [[unlikely]] {
on_unmapped(size, addr);
return false;
}
while (remaining_size) { while (remaining_size) {
const std::size_t copy_amount = const std::size_t copy_amount =
std::min(static_cast<std::size_t>(YUZU_PAGESIZE) - page_offset, remaining_size); std::min(static_cast<std::size_t>(YUZU_PAGESIZE) - page_offset, remaining_size);
@ -420,7 +435,7 @@ struct Memory::Impl {
} }
void MarkRegionDebug(u64 vaddr, u64 size, bool debug) { void MarkRegionDebug(u64 vaddr, u64 size, bool debug) {
if (vaddr == 0) { if (vaddr == 0 || !AddressSpaceContains(*current_page_table, vaddr, size)) {
return; return;
} }
@ -476,7 +491,7 @@ struct Memory::Impl {
} }
void RasterizerMarkRegionCached(u64 vaddr, u64 size, bool cached) { void RasterizerMarkRegionCached(u64 vaddr, u64 size, bool cached) {
if (vaddr == 0) { if (vaddr == 0 || !AddressSpaceContains(*current_page_table, vaddr, size)) {
return; return;
} }
@ -611,7 +626,7 @@ struct Memory::Impl {
// AARCH64 masks the upper 16 bit of all memory accesses // AARCH64 masks the upper 16 bit of all memory accesses
vaddr = vaddr & 0xffffffffffffULL; vaddr = vaddr & 0xffffffffffffULL;
if (vaddr >= 1uLL << current_page_table->GetAddressSpaceBits()) { if (!AddressSpaceContains(*current_page_table, vaddr, 1)) [[unlikely]] {
on_unmapped(); on_unmapped();
return nullptr; return nullptr;
} }