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https://github.com/Atmosphere-NX/Atmosphere-libs.git
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91 lines
3.8 KiB
C++
91 lines
3.8 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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#include "os_io_region_impl.hpp"
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#include "os_aslr_space_manager_types.hpp"
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#include "os_aslr_space_manager.hpp"
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namespace ams::os::impl {
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namespace {
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constexpr svc::MemoryPermission ConvertToSvcMemoryPermission(os::MemoryPermission perm) {
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switch (perm) {
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case os::MemoryPermission_None: return svc::MemoryPermission_None;
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case os::MemoryPermission_ReadOnly: return svc::MemoryPermission_Read;
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case os::MemoryPermission_WriteOnly: return svc::MemoryPermission_Write;
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case os::MemoryPermission_ReadWrite: return svc::MemoryPermission_ReadWrite;
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AMS_UNREACHABLE_DEFAULT_CASE();
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}
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}
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constexpr svc::MemoryMapping ConvertToSvcMemoryMapping(os::MemoryMapping mapping) {
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static_assert(std::same_as<svc::MemoryMapping, os::MemoryMapping>);
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return mapping;
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}
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}
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Result IoRegionImpl::CreateIoRegion(NativeHandle *out, NativeHandle io_pool_handle, uintptr_t address, size_t size, MemoryMapping mapping, MemoryPermission permission) {
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/* Convert mapping/permission. */
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const auto svc_mapping = ConvertToSvcMemoryMapping(mapping);
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const auto svc_perm = ConvertToSvcMemoryPermission(permission);
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/* Create the io region. */
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/* TODO: Result conversion/abort on unexpected result? */
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svc::Handle handle;
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R_TRY(svc::CreateIoRegion(std::addressof(handle), io_pool_handle, address, size, svc_mapping, svc_perm));
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*out = handle;
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R_SUCCEED();
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}
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Result IoRegionImpl::MapIoRegion(void **out, NativeHandle handle, size_t size, MemoryPermission perm) {
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/* Convert permission. */
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const auto svc_perm = ConvertToSvcMemoryPermission(perm);
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/* Map at a random address. */
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uintptr_t mapped_address;
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R_TRY(impl::GetAslrSpaceManager().MapAtRandomAddress(std::addressof(mapped_address),
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[handle, svc_perm](uintptr_t map_address, size_t map_size) -> Result {
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R_TRY_CATCH(svc::MapIoRegion(handle, map_address, map_size, svc_perm)) {
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/* TODO: What's the correct result for these? */
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// R_CONVERT(svc::ResultInvalidHandle, os::ResultInvalidHandle())
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// R_CONVERT(svc::ResultInvalidSize, os::Result???())
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// R_CONVERT(svc::ResultInvalidState, os::Result???())
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R_CONVERT(svc::ResultInvalidCurrentMemory, os::ResultInvalidCurrentMemoryState())
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} R_END_TRY_CATCH_WITH_ABORT_UNLESS;
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R_SUCCEED();
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},
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[handle](uintptr_t map_address, size_t map_size) -> void {
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return IoRegionImpl::UnmapIoRegion(handle, reinterpret_cast<void *>(map_address), map_size);
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},
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size,
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0
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));
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/* Return the address we mapped at. */
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*out = reinterpret_cast<void *>(mapped_address);
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R_SUCCEED();
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}
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void IoRegionImpl::UnmapIoRegion(NativeHandle handle, void *address, size_t size) {
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R_ABORT_UNLESS(svc::UnmapIoRegion(handle, reinterpret_cast<uintptr_t>(address), size));
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}
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}
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