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Mprotect only over whole pages

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This commit is contained in:
Marcin Mikołajczyk 2025-05-12 20:15:36 +01:00
parent fed064931a
commit b929ecf44e
1 changed files with 6 additions and 3 deletions
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9
src/core/memory.cpp
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@ -552,17 +552,20 @@ s64 MemoryManager::ProtectBytes(VAddr addr, VirtualMemoryArea vma_base, size_t s
s32 MemoryManager::Protect(VAddr addr, size_t size, MemoryProt prot) { s32 MemoryManager::Protect(VAddr addr, size_t size, MemoryProt prot) {
std::scoped_lock lk{mutex}; std::scoped_lock lk{mutex};
s64 protected_bytes = 0; s64 protected_bytes = 0;
auto aligned_addr = Common::AlignDown(addr, 16_KB);
auto aligned_size = Common::AlignUp(size, 16_KB);
do { do {
auto it = FindVMA(addr + protected_bytes); auto it = FindVMA(aligned_addr + protected_bytes);
auto& vma_base = it->second; auto& vma_base = it->second;
auto result = 0; auto result = 0;
result = ProtectBytes(addr + protected_bytes, vma_base, size - protected_bytes, prot); result = ProtectBytes(aligned_addr + protected_bytes, vma_base, aligned_size - protected_bytes, prot);
if (result < 0) { if (result < 0) {
// ProtectBytes returned an error, return it // ProtectBytes returned an error, return it
return result; return result;
} }
protected_bytes += result; protected_bytes += result;
} while (protected_bytes < size); } while (protected_bytes < aligned_size);
return ORBIS_OK; return ORBIS_OK;
} }