mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-18 01:46:47 +00:00
116 lines
4.4 KiB
C++
116 lines
4.4 KiB
C++
/*
|
|
* Copyright (c) 2018-2020 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include <mesosphere.hpp>
|
|
|
|
namespace ams::kern {
|
|
|
|
Result KTransferMemory::Initialize(KProcessAddress addr, size_t size, ams::svc::MemoryPermission own_perm) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Set members. */
|
|
this->owner = GetCurrentProcessPointer();
|
|
|
|
/* Initialize the page group. */
|
|
auto &page_table = this->owner->GetPageTable();
|
|
new (GetPointer(this->page_group)) KPageGroup(page_table.GetBlockInfoManager());
|
|
|
|
/* Ensure that our page group's state is valid on exit. */
|
|
auto pg_guard = SCOPE_GUARD { GetReference(this->page_group).~KPageGroup(); };
|
|
|
|
/* Lock the memory. */
|
|
R_TRY(page_table.LockForTransferMemory(GetPointer(this->page_group), addr, size, ConvertToKMemoryPermission(own_perm)));
|
|
|
|
/* Set remaining tracking members. */
|
|
this->owner->Open();
|
|
this->owner_perm = own_perm;
|
|
this->address = addr;
|
|
this->is_initialized = true;
|
|
this->is_mapped = false;
|
|
|
|
/* We succeeded. */
|
|
pg_guard.Cancel();
|
|
return ResultSuccess();
|
|
}
|
|
|
|
void KTransferMemory::Finalize() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Unmap. */
|
|
if (!this->is_mapped) {
|
|
const size_t size = GetReference(this->page_group).GetNumPages() * PageSize;
|
|
MESOSPHERE_R_ABORT_UNLESS(this->owner->GetPageTable().UnlockForTransferMemory(this->address, size, GetReference(this->page_group)));
|
|
}
|
|
|
|
/* Close the page group. */
|
|
GetReference(this->page_group).Close();
|
|
GetReference(this->page_group).Finalize();
|
|
|
|
/* Perform inherited finalization. */
|
|
KAutoObjectWithSlabHeapAndContainer<KTransferMemory, KAutoObjectWithList>::Finalize();
|
|
}
|
|
|
|
void KTransferMemory::PostDestroy(uintptr_t arg) {
|
|
KProcess *owner = reinterpret_cast<KProcess *>(arg);
|
|
owner->ReleaseResource(ams::svc::LimitableResource_TransferMemoryCountMax, 1);
|
|
owner->Close();
|
|
}
|
|
|
|
Result KTransferMemory::Map(KProcessAddress address, size_t size, ams::svc::MemoryPermission map_perm) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Validate the size. */
|
|
R_UNLESS(GetReference(this->page_group).GetNumPages() == util::DivideUp(size, PageSize), svc::ResultInvalidSize());
|
|
|
|
/* Validate the permission. */
|
|
R_UNLESS(this->owner_perm == map_perm, svc::ResultInvalidState());
|
|
|
|
/* Lock ourselves. */
|
|
KScopedLightLock lk(this->lock);
|
|
|
|
/* Ensure we're not already mapped. */
|
|
R_UNLESS(!this->is_mapped, svc::ResultInvalidState());
|
|
|
|
/* Map the memory. */
|
|
const KMemoryState state = (this->owner_perm == ams::svc::MemoryPermission_None) ? KMemoryState_Transfered : KMemoryState_SharedTransfered;
|
|
R_TRY(GetCurrentProcess().GetPageTable().MapPageGroup(address, GetReference(this->page_group), state, KMemoryPermission_UserReadWrite));
|
|
|
|
/* Mark ourselves as mapped. */
|
|
this->is_mapped = true;
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result KTransferMemory::Unmap(KProcessAddress address, size_t size) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Validate the size. */
|
|
R_UNLESS(GetReference(this->page_group).GetNumPages() == util::DivideUp(size, PageSize), svc::ResultInvalidSize());
|
|
|
|
/* Lock ourselves. */
|
|
KScopedLightLock lk(this->lock);
|
|
|
|
/* Unmap the memory. */
|
|
const KMemoryState state = (this->owner_perm == ams::svc::MemoryPermission_None) ? KMemoryState_Transfered : KMemoryState_SharedTransfered;
|
|
R_TRY(GetCurrentProcess().GetPageTable().UnmapPageGroup(address, GetReference(this->page_group), state));
|
|
|
|
/* Mark ourselves as unmapped. */
|
|
MESOSPHERE_ASSERT(this->is_mapped);
|
|
this->is_mapped = false;
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
}
|