mirror of
https://git.suyu.dev/suyu/suyu
synced 2024-12-25 19:02:45 -06:00
Merge pull request #7974 from bunnei/improve-code-mem
Kernel Memory Updates (Part 5): Revamp MapCodeMemory and UnmapCodeMemory.
This commit is contained in:
bunnei
GitHub
commit
1f37896066
2 changed files with 117 additions and 48 deletions
|
|
@ -285,72 +285,141 @@ ResultCode KPageTable::MapProcessCode(VAddr addr, std::size_t num_pages, KMemory
|
|||
return ResultSuccess;
|
||||
}
|
||||
|
||||
ResultCode KPageTable::MapCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size) {
|
||||
ResultCode KPageTable::MapCodeMemory(VAddr dst_address, VAddr src_address, std::size_t size) {
|
||||
// Validate the mapping request.
|
||||
R_UNLESS(this->CanContain(dst_address, size, KMemoryState::AliasCode),
|
||||
ResultInvalidMemoryRegion);
|
||||
|
||||
// Lock the table.
|
||||
KScopedLightLock lk(general_lock);
|
||||
|
||||
const std::size_t num_pages{size / PageSize};
|
||||
// Verify that the source memory is normal heap.
|
||||
KMemoryState src_state{};
|
||||
KMemoryPermission src_perm{};
|
||||
std::size_t num_src_allocator_blocks{};
|
||||
R_TRY(this->CheckMemoryState(&src_state, &src_perm, nullptr, &num_src_allocator_blocks,
|
||||
src_address, size, KMemoryState::All, KMemoryState::Normal,
|
||||
KMemoryPermission::All, KMemoryPermission::UserReadWrite,
|
||||
KMemoryAttribute::All, KMemoryAttribute::None));
|
||||
|
||||
KMemoryState state{};
|
||||
KMemoryPermission perm{};
|
||||
CASCADE_CODE(CheckMemoryState(&state, &perm, nullptr, nullptr, src_addr, size,
|
||||
KMemoryState::All, KMemoryState::Normal, KMemoryPermission::All,
|
||||
KMemoryPermission::UserReadWrite, KMemoryAttribute::Mask,
|
||||
KMemoryAttribute::None, KMemoryAttribute::IpcAndDeviceMapped));
|
||||
|
||||
if (IsRegionMapped(dst_addr, size)) {
|
||||
return ResultInvalidCurrentMemory;
|
||||
}
|
||||
|
||||
KPageLinkedList page_linked_list;
|
||||
AddRegionToPages(src_addr, num_pages, page_linked_list);
|
||||
// Verify that the destination memory is unmapped.
|
||||
std::size_t num_dst_allocator_blocks{};
|
||||
R_TRY(this->CheckMemoryState(&num_dst_allocator_blocks, dst_address, size, KMemoryState::All,
|
||||
KMemoryState::Free, KMemoryPermission::None,
|
||||
KMemoryPermission::None, KMemoryAttribute::None,
|
||||
KMemoryAttribute::None));
|
||||
|
||||
// Map the code memory.
|
||||
{
|
||||
auto block_guard = detail::ScopeExit(
|
||||
[&] { Operate(src_addr, num_pages, perm, OperationType::ChangePermissions); });
|
||||
// Determine the number of pages being operated on.
|
||||
const std::size_t num_pages = size / PageSize;
|
||||
|
||||
CASCADE_CODE(Operate(src_addr, num_pages, KMemoryPermission::None,
|
||||
OperationType::ChangePermissions));
|
||||
CASCADE_CODE(MapPages(dst_addr, page_linked_list, KMemoryPermission::None));
|
||||
// Create page groups for the memory being mapped.
|
||||
KPageLinkedList pg;
|
||||
AddRegionToPages(src_address, num_pages, pg);
|
||||
|
||||
block_guard.Cancel();
|
||||
// Reprotect the source as kernel-read/not mapped.
|
||||
const auto new_perm = static_cast<KMemoryPermission>(KMemoryPermission::KernelRead |
|
||||
KMemoryPermission::NotMapped);
|
||||
R_TRY(Operate(src_address, num_pages, new_perm, OperationType::ChangePermissions));
|
||||
|
||||
// Ensure that we unprotect the source pages on failure.
|
||||
auto unprot_guard = SCOPE_GUARD({
|
||||
ASSERT(this->Operate(src_address, num_pages, src_perm, OperationType::ChangePermissions)
|
||||
.IsSuccess());
|
||||
});
|
||||
|
||||
// Map the alias pages.
|
||||
R_TRY(MapPages(dst_address, pg, new_perm));
|
||||
|
||||
// We successfully mapped the alias pages, so we don't need to unprotect the src pages on
|
||||
// failure.
|
||||
unprot_guard.Cancel();
|
||||
|
||||
// Apply the memory block updates.
|
||||
block_manager->Update(src_address, num_pages, src_state, new_perm,
|
||||
KMemoryAttribute::Locked);
|
||||
block_manager->Update(dst_address, num_pages, KMemoryState::AliasCode, new_perm,
|
||||
KMemoryAttribute::None);
|
||||
}
|
||||
|
||||
block_manager->Update(src_addr, num_pages, state, KMemoryPermission::None,
|
||||
KMemoryAttribute::Locked);
|
||||
block_manager->Update(dst_addr, num_pages, KMemoryState::AliasCode);
|
||||
|
||||
return ResultSuccess;
|
||||
}
|
||||
|
||||
ResultCode KPageTable::UnmapCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size) {
|
||||
ResultCode KPageTable::UnmapCodeMemory(VAddr dst_address, VAddr src_address, std::size_t size) {
|
||||
// Validate the mapping request.
|
||||
R_UNLESS(this->CanContain(dst_address, size, KMemoryState::AliasCode),
|
||||
ResultInvalidMemoryRegion);
|
||||
|
||||
// Lock the table.
|
||||
KScopedLightLock lk(general_lock);
|
||||
|
||||
if (!size) {
|
||||
return ResultSuccess;
|
||||
// Verify that the source memory is locked normal heap.
|
||||
std::size_t num_src_allocator_blocks{};
|
||||
R_TRY(this->CheckMemoryState(std::addressof(num_src_allocator_blocks), src_address, size,
|
||||
KMemoryState::All, KMemoryState::Normal, KMemoryPermission::None,
|
||||
KMemoryPermission::None, KMemoryAttribute::All,
|
||||
KMemoryAttribute::Locked));
|
||||
|
||||
// Verify that the destination memory is aliasable code.
|
||||
std::size_t num_dst_allocator_blocks{};
|
||||
R_TRY(this->CheckMemoryStateContiguous(
|
||||
std::addressof(num_dst_allocator_blocks), dst_address, size, KMemoryState::FlagCanCodeAlias,
|
||||
KMemoryState::FlagCanCodeAlias, KMemoryPermission::None, KMemoryPermission::None,
|
||||
KMemoryAttribute::All, KMemoryAttribute::None));
|
||||
|
||||
// Determine whether any pages being unmapped are code.
|
||||
bool any_code_pages = false;
|
||||
{
|
||||
KMemoryBlockManager::const_iterator it = block_manager->FindIterator(dst_address);
|
||||
while (true) {
|
||||
// Get the memory info.
|
||||
const KMemoryInfo info = it->GetMemoryInfo();
|
||||
|
||||
// Check if the memory has code flag.
|
||||
if ((info.GetState() & KMemoryState::FlagCode) != KMemoryState::None) {
|
||||
any_code_pages = true;
|
||||
break;
|
||||
}
|
||||
|
||||
// Check if we're done.
|
||||
if (dst_address + size - 1 <= info.GetLastAddress()) {
|
||||
break;
|
||||
}
|
||||
|
||||
// Advance.
|
||||
++it;
|
||||
}
|
||||
}
|
||||
|
||||
const std::size_t num_pages{size / PageSize};
|
||||
// Ensure that we maintain the instruction cache.
|
||||
bool reprotected_pages = false;
|
||||
SCOPE_EXIT({
|
||||
if (reprotected_pages && any_code_pages) {
|
||||
system.InvalidateCpuInstructionCacheRange(dst_address, size);
|
||||
}
|
||||
});
|
||||
|
||||
CASCADE_CODE(CheckMemoryState(nullptr, nullptr, nullptr, nullptr, src_addr, size,
|
||||
KMemoryState::All, KMemoryState::Normal, KMemoryPermission::None,
|
||||
KMemoryPermission::None, KMemoryAttribute::Mask,
|
||||
KMemoryAttribute::Locked, KMemoryAttribute::IpcAndDeviceMapped));
|
||||
// Unmap.
|
||||
{
|
||||
// Determine the number of pages being operated on.
|
||||
const std::size_t num_pages = size / PageSize;
|
||||
|
||||
KMemoryState state{};
|
||||
CASCADE_CODE(CheckMemoryState(
|
||||
&state, nullptr, nullptr, nullptr, dst_addr, PageSize, KMemoryState::FlagCanCodeAlias,
|
||||
KMemoryState::FlagCanCodeAlias, KMemoryPermission::None, KMemoryPermission::None,
|
||||
KMemoryAttribute::Mask, KMemoryAttribute::None, KMemoryAttribute::IpcAndDeviceMapped));
|
||||
CASCADE_CODE(CheckMemoryState(dst_addr, size, KMemoryState::All, state, KMemoryPermission::None,
|
||||
KMemoryPermission::None, KMemoryAttribute::Mask,
|
||||
KMemoryAttribute::None));
|
||||
CASCADE_CODE(Operate(dst_addr, num_pages, KMemoryPermission::None, OperationType::Unmap));
|
||||
// Unmap the aliased copy of the pages.
|
||||
R_TRY(Operate(dst_address, num_pages, KMemoryPermission::None, OperationType::Unmap));
|
||||
|
||||
block_manager->Update(dst_addr, num_pages, KMemoryState::Free);
|
||||
block_manager->Update(src_addr, num_pages, KMemoryState::Normal,
|
||||
KMemoryPermission::UserReadWrite);
|
||||
// Try to set the permissions for the source pages back to what they should be.
|
||||
R_TRY(Operate(src_address, num_pages, KMemoryPermission::UserReadWrite,
|
||||
OperationType::ChangePermissions));
|
||||
|
||||
system.InvalidateCpuInstructionCacheRange(dst_addr, size);
|
||||
// Apply the memory block updates.
|
||||
block_manager->Update(dst_address, num_pages, KMemoryState::None);
|
||||
block_manager->Update(src_address, num_pages, KMemoryState::Normal,
|
||||
KMemoryPermission::UserReadWrite);
|
||||
|
||||
// Note that we reprotected pages.
|
||||
reprotected_pages = true;
|
||||
}
|
||||
|
||||
return ResultSuccess;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -36,8 +36,8 @@ public:
|
|||
KMemoryManager::Pool pool);
|
||||
ResultCode MapProcessCode(VAddr addr, std::size_t pages_count, KMemoryState state,
|
||||
KMemoryPermission perm);
|
||||
ResultCode MapCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size);
|
||||
ResultCode UnmapCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size);
|
||||
ResultCode MapCodeMemory(VAddr dst_address, VAddr src_address, std::size_t size);
|
||||
ResultCode UnmapCodeMemory(VAddr dst_address, VAddr src_address, std::size_t size);
|
||||
ResultCode UnmapProcessMemory(VAddr dst_addr, std::size_t size, KPageTable& src_page_table,
|
||||
VAddr src_addr);
|
||||
ResultCode MapPhysicalMemory(VAddr addr, std::size_t size);
|
||||
|
|
|
|||
Loading…
Reference in a new issue