mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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96f95b9f95
* result: try out some experimental shenanigans * result: sketch out some more shenanigans * result: see what it looks like to convert kernel to use result conds instead of guards * make rest of kernel use experimental new macro-ing
218 lines
12 KiB
C++
218 lines
12 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 <mesosphere.hpp>
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namespace ams::kern::svc {
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/* ============================= Common ============================= */
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namespace {
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constexpr inline u64 DeviceAddressSpaceAlignMask = (1ul << 22) - 1;
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constexpr bool IsProcessAndDeviceAligned(uint64_t process_address, uint64_t device_address) {
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return (process_address & DeviceAddressSpaceAlignMask) == (device_address & DeviceAddressSpaceAlignMask);
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}
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Result CreateDeviceAddressSpace(ams::svc::Handle *out, uint64_t das_address, uint64_t das_size) {
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/* Validate input. */
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R_UNLESS(util::IsAligned(das_address, PageSize), svc::ResultInvalidMemoryRegion());
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R_UNLESS(util::IsAligned(das_size, PageSize), svc::ResultInvalidMemoryRegion());
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R_UNLESS(das_size > 0, svc::ResultInvalidMemoryRegion());
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R_UNLESS((das_address < das_address + das_size), svc::ResultInvalidMemoryRegion());
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/* Create the device address space. */
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KDeviceAddressSpace *das = KDeviceAddressSpace::Create();
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R_UNLESS(das != nullptr, svc::ResultOutOfResource());
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ON_SCOPE_EXIT { das->Close(); };
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/* Initialize the device address space. */
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R_TRY(das->Initialize(das_address, das_size));
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/* Register the device address space. */
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KDeviceAddressSpace::Register(das);
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/* Add to the handle table. */
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R_TRY(GetCurrentProcess().GetHandleTable().Add(out, das));
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R_SUCCEED();
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}
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Result AttachDeviceAddressSpace(ams::svc::DeviceName device_name, ams::svc::Handle das_handle) {
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/* Get the device address space. */
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KScopedAutoObject das = GetCurrentProcess().GetHandleTable().GetObject<KDeviceAddressSpace>(das_handle);
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R_UNLESS(das.IsNotNull(), svc::ResultInvalidHandle());
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/* Attach. */
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R_RETURN(das->Attach(device_name));
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}
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Result DetachDeviceAddressSpace(ams::svc::DeviceName device_name, ams::svc::Handle das_handle) {
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/* Get the device address space. */
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KScopedAutoObject das = GetCurrentProcess().GetHandleTable().GetObject<KDeviceAddressSpace>(das_handle);
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R_UNLESS(das.IsNotNull(), svc::ResultInvalidHandle());
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/* Detach. */
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R_RETURN(das->Detach(device_name));
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}
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constexpr bool IsValidDeviceMemoryPermission(ams::svc::MemoryPermission device_perm) {
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switch (device_perm) {
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case ams::svc::MemoryPermission_Read:
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case ams::svc::MemoryPermission_Write:
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case ams::svc::MemoryPermission_ReadWrite:
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return true;
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default:
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return false;
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}
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}
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Result MapDeviceAddressSpaceByForce(ams::svc::Handle das_handle, ams::svc::Handle process_handle, uint64_t process_address, size_t size, uint64_t device_address, ams::svc::MemoryPermission device_perm) {
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/* Validate input. */
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R_UNLESS(util::IsAligned(process_address, PageSize), svc::ResultInvalidAddress());
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R_UNLESS(util::IsAligned(device_address, PageSize), svc::ResultInvalidAddress());
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R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
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R_UNLESS(size > 0, svc::ResultInvalidSize());
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R_UNLESS((process_address < process_address + size), svc::ResultInvalidCurrentMemory());
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R_UNLESS((device_address < device_address + size), svc::ResultInvalidMemoryRegion());
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R_UNLESS((process_address == static_cast<uintptr_t>(process_address)), svc::ResultInvalidCurrentMemory());
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R_UNLESS(IsValidDeviceMemoryPermission(device_perm), svc::ResultInvalidNewMemoryPermission());
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/* Get the device address space. */
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KScopedAutoObject das = GetCurrentProcess().GetHandleTable().GetObject<KDeviceAddressSpace>(das_handle);
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R_UNLESS(das.IsNotNull(), svc::ResultInvalidHandle());
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/* Get the process. */
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KScopedAutoObject process = GetCurrentProcess().GetHandleTable().GetObject<KProcess>(process_handle);
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R_UNLESS(process.IsNotNull(), svc::ResultInvalidHandle());
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/* Validate that the process address is within range. */
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auto &page_table = process->GetPageTable();
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R_UNLESS(page_table.Contains(process_address, size), svc::ResultInvalidCurrentMemory());
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/* Map. */
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R_RETURN(das->MapByForce(std::addressof(page_table), KProcessAddress(process_address), size, device_address, device_perm));
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}
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Result MapDeviceAddressSpaceAligned(ams::svc::Handle das_handle, ams::svc::Handle process_handle, uint64_t process_address, size_t size, uint64_t device_address, ams::svc::MemoryPermission device_perm) {
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/* Validate input. */
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R_UNLESS(util::IsAligned(process_address, PageSize), svc::ResultInvalidAddress());
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R_UNLESS(util::IsAligned(device_address, PageSize), svc::ResultInvalidAddress());
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R_UNLESS(IsProcessAndDeviceAligned(process_address, device_address), svc::ResultInvalidAddress());
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R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
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R_UNLESS(size > 0, svc::ResultInvalidSize());
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R_UNLESS((process_address < process_address + size), svc::ResultInvalidCurrentMemory());
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R_UNLESS((device_address < device_address + size), svc::ResultInvalidMemoryRegion());
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R_UNLESS((process_address == static_cast<uintptr_t>(process_address)), svc::ResultInvalidCurrentMemory());
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R_UNLESS(IsValidDeviceMemoryPermission(device_perm), svc::ResultInvalidNewMemoryPermission());
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/* Get the device address space. */
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KScopedAutoObject das = GetCurrentProcess().GetHandleTable().GetObject<KDeviceAddressSpace>(das_handle);
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R_UNLESS(das.IsNotNull(), svc::ResultInvalidHandle());
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/* Get the process. */
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KScopedAutoObject process = GetCurrentProcess().GetHandleTable().GetObject<KProcess>(process_handle);
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R_UNLESS(process.IsNotNull(), svc::ResultInvalidHandle());
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/* Validate that the process address is within range. */
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auto &page_table = process->GetPageTable();
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R_UNLESS(page_table.Contains(process_address, size), svc::ResultInvalidCurrentMemory());
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/* Map. */
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R_RETURN(das->MapAligned(std::addressof(page_table), KProcessAddress(process_address), size, device_address, device_perm));
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}
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Result UnmapDeviceAddressSpace(ams::svc::Handle das_handle, ams::svc::Handle process_handle, uint64_t process_address, size_t size, uint64_t device_address) {
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/* Validate input. */
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R_UNLESS(util::IsAligned(process_address, PageSize), svc::ResultInvalidAddress());
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R_UNLESS(util::IsAligned(device_address, PageSize), svc::ResultInvalidAddress());
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R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
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R_UNLESS(size > 0, svc::ResultInvalidSize());
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R_UNLESS((process_address < process_address + size), svc::ResultInvalidCurrentMemory());
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R_UNLESS((device_address < device_address + size), svc::ResultInvalidMemoryRegion());
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R_UNLESS((process_address == static_cast<uintptr_t>(process_address)), svc::ResultInvalidCurrentMemory());
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/* Get the device address space. */
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KScopedAutoObject das = GetCurrentProcess().GetHandleTable().GetObject<KDeviceAddressSpace>(das_handle);
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R_UNLESS(das.IsNotNull(), svc::ResultInvalidHandle());
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/* Get the process. */
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KScopedAutoObject process = GetCurrentProcess().GetHandleTable().GetObject<KProcess>(process_handle);
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R_UNLESS(process.IsNotNull(), svc::ResultInvalidHandle());
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/* Validate that the process address is within range. */
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auto &page_table = process->GetPageTable();
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R_UNLESS(page_table.Contains(process_address, size), svc::ResultInvalidCurrentMemory());
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R_RETURN(das->Unmap(std::addressof(page_table), KProcessAddress(process_address), size, device_address));
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}
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}
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/* ============================= 64 ABI ============================= */
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Result CreateDeviceAddressSpace64(ams::svc::Handle *out_handle, uint64_t das_address, uint64_t das_size) {
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R_RETURN(CreateDeviceAddressSpace(out_handle, das_address, das_size));
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}
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Result AttachDeviceAddressSpace64(ams::svc::DeviceName device_name, ams::svc::Handle das_handle) {
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R_RETURN(AttachDeviceAddressSpace(device_name, das_handle));
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}
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Result DetachDeviceAddressSpace64(ams::svc::DeviceName device_name, ams::svc::Handle das_handle) {
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R_RETURN(DetachDeviceAddressSpace(device_name, das_handle));
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}
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Result MapDeviceAddressSpaceByForce64(ams::svc::Handle das_handle, ams::svc::Handle process_handle, uint64_t process_address, ams::svc::Size size, uint64_t device_address, ams::svc::MemoryPermission device_perm) {
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R_RETURN(MapDeviceAddressSpaceByForce(das_handle, process_handle, process_address, size, device_address, device_perm));
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}
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Result MapDeviceAddressSpaceAligned64(ams::svc::Handle das_handle, ams::svc::Handle process_handle, uint64_t process_address, ams::svc::Size size, uint64_t device_address, ams::svc::MemoryPermission device_perm) {
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R_RETURN(MapDeviceAddressSpaceAligned(das_handle, process_handle, process_address, size, device_address, device_perm));
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}
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Result UnmapDeviceAddressSpace64(ams::svc::Handle das_handle, ams::svc::Handle process_handle, uint64_t process_address, ams::svc::Size size, uint64_t device_address) {
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R_RETURN(UnmapDeviceAddressSpace(das_handle, process_handle, process_address, size, device_address));
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}
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/* ============================= 64From32 ABI ============================= */
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Result CreateDeviceAddressSpace64From32(ams::svc::Handle *out_handle, uint64_t das_address, uint64_t das_size) {
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R_RETURN(CreateDeviceAddressSpace(out_handle, das_address, das_size));
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}
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Result AttachDeviceAddressSpace64From32(ams::svc::DeviceName device_name, ams::svc::Handle das_handle) {
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R_RETURN(AttachDeviceAddressSpace(device_name, das_handle));
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}
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Result DetachDeviceAddressSpace64From32(ams::svc::DeviceName device_name, ams::svc::Handle das_handle) {
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R_RETURN(DetachDeviceAddressSpace(device_name, das_handle));
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}
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Result MapDeviceAddressSpaceByForce64From32(ams::svc::Handle das_handle, ams::svc::Handle process_handle, uint64_t process_address, ams::svc::Size size, uint64_t device_address, ams::svc::MemoryPermission device_perm) {
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R_RETURN(MapDeviceAddressSpaceByForce(das_handle, process_handle, process_address, size, device_address, device_perm));
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}
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Result MapDeviceAddressSpaceAligned64From32(ams::svc::Handle das_handle, ams::svc::Handle process_handle, uint64_t process_address, ams::svc::Size size, uint64_t device_address, ams::svc::MemoryPermission device_perm) {
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R_RETURN(MapDeviceAddressSpaceAligned(das_handle, process_handle, process_address, size, device_address, device_perm));
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}
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Result UnmapDeviceAddressSpace64From32(ams::svc::Handle das_handle, ams::svc::Handle process_handle, uint64_t process_address, ams::svc::Size size, uint64_t device_address) {
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R_RETURN(UnmapDeviceAddressSpace(das_handle, process_handle, process_address, size, device_address));
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}
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}
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