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Kernel: Properly implement ControlMemory FREE and COMMIT

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This commit is contained in:
Yuri Kunde Schlesner
2015-07-17 23:19:16 -03:00
parent ccab02c723
commit cdeeecf080
6 changed files with 338 additions and 38 deletions
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91
src/core/hle/kernel/vm_manager.cpp
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@ -60,7 +60,11 @@ void VMManager::Reset() {
}
VMManager::VMAHandle VMManager::FindVMA(VAddr target) const {
return std::prev(vma_map.upper_bound(target));
if (target >= MAX_ADDRESS) {
return vma_map.end();
} else {
return std::prev(vma_map.upper_bound(target));
}
}
ResultVal<VMManager::VMAHandle> VMManager::MapMemoryBlock(VAddr target,
@ -115,10 +119,8 @@ ResultVal<VMManager::VMAHandle> VMManager::MapMMIO(VAddr target, PAddr paddr, u3
return MakeResult<VMAHandle>(MergeAdjacent(vma_handle));
}
void VMManager::Unmap(VMAHandle vma_handle) {
VMAIter iter = StripIterConstness(vma_handle);
VirtualMemoryArea& vma = iter->second;
VMManager::VMAIter VMManager::Unmap(VMAIter vma_handle) {
VirtualMemoryArea& vma = vma_handle->second;
vma.type = VMAType::Free;
vma.permissions = VMAPermission::None;
vma.meminfo_state = MemoryState::Free;
@ -130,17 +132,57 @@ void VMManager::Unmap(VMAHandle vma_handle) {
UpdatePageTableForVMA(vma);
MergeAdjacent(iter);
return MergeAdjacent(vma_handle);
}
void VMManager::Reprotect(VMAHandle vma_handle, VMAPermission new_perms) {
ResultCode VMManager::UnmapRange(VAddr target, u32 size) {
CASCADE_RESULT(VMAIter vma, CarveVMARange(target, size));
VAddr target_end = target + size;
VMAIter end = vma_map.end();
// The comparison against the end of the range must be done using addresses since VMAs can be
// merged during this process, causing invalidation of the iterators.
while (vma != end && vma->second.base < target_end) {
vma = std::next(Unmap(vma));
}
ASSERT(FindVMA(target)->second.size >= size);
return RESULT_SUCCESS;
}
VMManager::VMAHandle VMManager::Reprotect(VMAHandle vma_handle, VMAPermission new_perms) {
VMAIter iter = StripIterConstness(vma_handle);
VirtualMemoryArea& vma = iter->second;
vma.permissions = new_perms;
UpdatePageTableForVMA(vma);
MergeAdjacent(iter);
return MergeAdjacent(iter);
}
ResultCode VMManager::ReprotectRange(VAddr target, u32 size, VMAPermission new_perms) {
CASCADE_RESULT(VMAIter vma, CarveVMARange(target, size));
VAddr target_end = target + size;
VMAIter end = vma_map.end();
// The comparison against the end of the range must be done using addresses since VMAs can be
// merged during this process, causing invalidation of the iterators.
while (vma != end && vma->second.base < target_end) {
vma = std::next(StripIterConstness(Reprotect(vma, new_perms)));
}
return RESULT_SUCCESS;
}
void VMManager::RefreshMemoryBlockMappings(const std::vector<u8>* block) {
// If this ever proves to have a noticeable performance impact, allow users of the function to
// specify a specific range of addresses to limit the scan to.
for (const auto& p : vma_map) {
const VirtualMemoryArea& vma = p.second;
if (block == vma.backing_block.get()) {
UpdatePageTableForVMA(vma);
}
}
}
void VMManager::LogLayout(Log::Level log_level) const {
@ -161,8 +203,8 @@ VMManager::VMAIter VMManager::StripIterConstness(const VMAHandle & iter) {
}
ResultVal<VMManager::VMAIter> VMManager::CarveVMA(VAddr base, u32 size) {
ASSERT_MSG((size & Memory::PAGE_MASK) == 0, "non-page aligned size: %8X", size);
ASSERT_MSG((base & Memory::PAGE_MASK) == 0, "non-page aligned base: %08X", base);
ASSERT_MSG((size & Memory::PAGE_MASK) == 0, "non-page aligned size: 0x%8X", size);
ASSERT_MSG((base & Memory::PAGE_MASK) == 0, "non-page aligned base: 0x%08X", base);
VMAIter vma_handle = StripIterConstness(FindVMA(base));
if (vma_handle == vma_map.end()) {
@ -196,6 +238,35 @@ ResultVal<VMManager::VMAIter> VMManager::CarveVMA(VAddr base, u32 size) {
return MakeResult<VMAIter>(vma_handle);
}
ResultVal<VMManager::VMAIter> VMManager::CarveVMARange(VAddr target, u32 size) {
ASSERT_MSG((size & Memory::PAGE_MASK) == 0, "non-page aligned size: 0x%8X", size);
ASSERT_MSG((target & Memory::PAGE_MASK) == 0, "non-page aligned base: 0x%08X", target);
VAddr target_end = target + size;
ASSERT(target_end >= target);
ASSERT(target_end <= MAX_ADDRESS);
ASSERT(size > 0);
VMAIter begin_vma = StripIterConstness(FindVMA(target));
VMAIter i_end = vma_map.lower_bound(target_end);
for (auto i = begin_vma; i != i_end; ++i) {
if (i->second.type == VMAType::Free) {
return ERR_INVALID_ADDRESS_STATE;
}
}
if (target != begin_vma->second.base) {
begin_vma = SplitVMA(begin_vma, target - begin_vma->second.base);
}
VMAIter end_vma = StripIterConstness(FindVMA(target_end));
if (end_vma != vma_map.end() && target_end != end_vma->second.base) {
end_vma = SplitVMA(end_vma, target_end - end_vma->second.base);
}
return MakeResult<VMAIter>(begin_vma);
}
VMManager::VMAIter VMManager::SplitVMA(VMAIter vma_handle, u32 offset_in_vma) {
VirtualMemoryArea& old_vma = vma_handle->second;
VirtualMemoryArea new_vma = old_vma; // Make a copy of the VMA