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// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "common/alignment.h"
#include "common/common_types.h"
#include "core/device_memory.h"
#include "core/hle/kernel/k_code_memory.h"
#include "core/hle/kernel/k_light_lock.h"
#include "core/hle/kernel/k_memory_block.h"
#include "core/hle/kernel/k_page_group.h"
#include "core/hle/kernel/k_page_table.h"
#include "core/hle/kernel/k_process.h"
#include "core/hle/kernel/slab_helpers.h"
#include "core/hle/kernel/svc_types.h"
#include "core/hle/result.h"
namespace Kernel {
KCodeMemory::KCodeMemory(KernelCore& kernel)
: KAutoObjectWithSlabHeapAndContainer{kernel}, m_lock(kernel) {}
Result KCodeMemory::Initialize(Core::DeviceMemory& device_memory, VAddr addr, size_t size) {
// Set members.
m_owner = GetCurrentProcessPointer(m_kernel);
// Get the owner page table.
auto& page_table = m_owner->PageTable();
// Construct the page group.
m_page_group.emplace(m_kernel, page_table.GetBlockInfoManager());
// Lock the memory.
R_TRY(page_table.LockForCodeMemory(std::addressof(*m_page_group), addr, size))
// Clear the memory.
for (const auto& block : *m_page_group) {
std::memset(device_memory.GetPointer<void>(block.GetAddress()), 0xFF, block.GetSize());
}
// Set remaining tracking members.
m_owner->Open();
m_address = addr;
m_is_initialized = true;
m_is_owner_mapped = false;
m_is_mapped = false;
// We succeeded.
R_SUCCEED();
}
void KCodeMemory::Finalize() {
// Unlock.
if (!m_is_mapped && !m_is_owner_mapped) {
const size_t size = m_page_group->GetNumPages() * PageSize;
m_owner->PageTable().UnlockForCodeMemory(m_address, size, *m_page_group);
}
// Close the page group.
m_page_group->Close();
m_page_group->Finalize();
// Close our reference to our owner.
m_owner->Close();
}
Result KCodeMemory::Map(VAddr address, size_t size) {
// Validate the size.
R_UNLESS(m_page_group->GetNumPages() == Common::DivideUp(size, PageSize), ResultInvalidSize);
// Lock ourselves.
KScopedLightLock lk(m_lock);
// Ensure we're not already mapped.
R_UNLESS(!m_is_mapped, ResultInvalidState);
// Map the memory.
R_TRY(GetCurrentProcess(m_kernel).PageTable().MapPageGroup(
address, *m_page_group, KMemoryState::CodeOut, KMemoryPermission::UserReadWrite));
// Mark ourselves as mapped.
m_is_mapped = true;
R_SUCCEED();
}
Result KCodeMemory::Unmap(VAddr address, size_t size) {
// Validate the size.
R_UNLESS(m_page_group->GetNumPages() == Common::DivideUp(size, PageSize), ResultInvalidSize);
// Lock ourselves.
KScopedLightLock lk(m_lock);
// Unmap the memory.
R_TRY(GetCurrentProcess(m_kernel).PageTable().UnmapPageGroup(address, *m_page_group,
KMemoryState::CodeOut));
// Mark ourselves as unmapped.
m_is_mapped = false;
R_SUCCEED();
}
Result KCodeMemory::MapToOwner(VAddr address, size_t size, Svc::MemoryPermission perm) {
// Validate the size.
R_UNLESS(m_page_group->GetNumPages() == Common::DivideUp(size, PageSize), ResultInvalidSize);
// Lock ourselves.
KScopedLightLock lk(m_lock);
// Ensure we're not already mapped.
R_UNLESS(!m_is_owner_mapped, ResultInvalidState);
// Convert the memory permission.
KMemoryPermission k_perm{};
switch (perm) {
case Svc::MemoryPermission::Read:
k_perm = KMemoryPermission::UserRead;
break;
case Svc::MemoryPermission::ReadExecute:
k_perm = KMemoryPermission::UserReadExecute;
break;
default:
// Already validated by ControlCodeMemory svc
UNREACHABLE();
}
// Map the memory.
R_TRY(m_owner->PageTable().MapPageGroup(address, *m_page_group, KMemoryState::GeneratedCode,
k_perm));
// Mark ourselves as mapped.
m_is_owner_mapped = true;
R_SUCCEED();
}
Result KCodeMemory::UnmapFromOwner(VAddr address, size_t size) {
// Validate the size.
R_UNLESS(m_page_group->GetNumPages() == Common::DivideUp(size, PageSize), ResultInvalidSize);
// Lock ourselves.
KScopedLightLock lk(m_lock);
// Unmap the memory.
R_TRY(m_owner->PageTable().UnmapPageGroup(address, *m_page_group, KMemoryState::GeneratedCode));
// Mark ourselves as unmapped.
m_is_owner_mapped = false;
R_SUCCEED();
}
} // namespace Kernel
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